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This commit is contained in:
Eyck Jentzsch
2019-06-28 23:08:36 +02:00
commit 4d8973e20b
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47
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/Makefile.include Normal file
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ifdef APPS
APPDIRS = $(foreach APP, $(APPS), ../apps/$(APP))
-include $(foreach APP, $(APPS), ../apps/$(APP)/Makefile.$(APP))
CFLAGS += $(addprefix -I../apps/,$(APPS))
endif
ifndef CCDEP
CCDEP = $(CC)
endif
ifndef CCDEPCFLAGS
CCDEPCFLAGS = $(CFLAGS)
endif
ifndef OBJECTDIR
OBJECTDIR = obj
endif
ifeq (${wildcard $(OBJECTDIR)},)
DUMMY := ${shell mkdir $(OBJECTDIR)}
endif
vpath %.c . ../uip ../lib $(APPDIRS)
$(OBJECTDIR)/%.o: %.c
$(CC) $(CFLAGS) -c $< -o $@
$(OBJECTDIR)/%.d: %.c
@set -e; rm -f $@; \
$(CCDEP) -MM $(CCDEPCFLAGS) $< > $@.$$$$; \
sed 's,\($*\)\.o[ :]*,$(OBJECTDIR)/\1.o $@ : ,g' < $@.$$$$ > $@; \
rm -f $@.$$$$
UIP_SOURCES=uip.c uip_arp.c uiplib.c psock.c timer.c uip-neighbor.c
ifneq ($(MAKECMDGOALS),clean)
-include $(addprefix $(OBJECTDIR)/,$(UIP_SOURCES:.c=.d) \
$(APP_SOURCES:.c=.d))
endif
uip.a: ${addprefix $(OBJECTDIR)/, $(UIP_SOURCES:.c=.o)}
$(AR) rcf $@ $^
apps.a: ${addprefix $(OBJECTDIR)/, $(APP_SOURCES:.c=.o)}
$(AR) rcf $@ $^

42
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/clock-arch.h Normal file
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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* $Id: clock-arch.h,v 1.2 2006/06/12 08:00:31 adam Exp $
*/
#ifndef __CLOCK_ARCH_H__
#define __CLOCK_ARCH_H__
#include "FreeRTOS.h"
typedef unsigned long clock_time_t;
#define CLOCK_CONF_SECOND configTICK_RATE_HZ
#endif /* __CLOCK_ARCH_H__ */

88
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/clock.h Normal file
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/**
* \defgroup clock Clock interface
*
* The clock interface is the interface between the \ref timer "timer library"
* and the platform specific clock functionality. The clock
* interface must be implemented for each platform that uses the \ref
* timer "timer library".
*
* The clock interface does only one this: it measures time. The clock
* interface provides a macro, CLOCK_SECOND, which corresponds to one
* second of system time.
*
* \sa \ref timer "Timer library"
*
* @{
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: clock.h,v 1.3 2006/06/11 21:46:39 adam Exp $
*/
#ifndef __CLOCK_H__
#define __CLOCK_H__
#include "clock-arch.h"
/**
* Initialize the clock library.
*
* This function initializes the clock library and should be called
* from the main() function of the system.
*
*/
void clock_init(void);
/**
* Get the current clock time.
*
* This function returns the current system clock time.
*
* \return The current clock time, measured in system ticks.
*/
clock_time_t clock_time(void);
/**
* A second, measured in system clock time.
*
* \hideinitializer
*/
#ifdef CLOCK_CONF_SECOND
#define CLOCK_SECOND CLOCK_CONF_SECOND
#else
#define CLOCK_SECOND (clock_time_t)32
#endif
#endif /* __CLOCK_H__ */
/** @} */

83
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/lc-addrlabels.h Normal file
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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: lc-addrlabels.h,v 1.3 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup lc
* @{
*/
/**
* \file
* Implementation of local continuations based on the "Labels as
* values" feature of gcc
* \author
* Adam Dunkels <adam@sics.se>
*
* This implementation of local continuations is based on a special
* feature of the GCC C compiler called "labels as values". This
* feature allows assigning pointers with the address of the code
* corresponding to a particular C label.
*
* For more information, see the GCC documentation:
* http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html
*
* Thanks to dividuum for finding the nice local scope label
* implementation.
*/
#ifndef __LC_ADDRLABELS_H__
#define __LC_ADDRLABELS_H__
/** \hideinitializer */
typedef void * lc_t;
#define LC_INIT(s) s = NULL
#define LC_RESUME(s) \
do { \
if(s != NULL) { \
goto *s; \
} \
} while(0)
#define LC_SET(s) \
do { ({ __label__ resume; resume: (s) = &&resume; }); }while(0)
#define LC_END(s)
#endif /* __LC_ADDRLABELS_H__ */
/** @} */

76
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/lc-switch.h Normal file
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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: lc-switch.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup lc
* @{
*/
/**
* \file
* Implementation of local continuations based on switch() statment
* \author Adam Dunkels <adam@sics.se>
*
* This implementation of local continuations uses the C switch()
* statement to resume execution of a function somewhere inside the
* function's body. The implementation is based on the fact that
* switch() statements are able to jump directly into the bodies of
* control structures such as if() or while() statmenets.
*
* This implementation borrows heavily from Simon Tatham's coroutines
* implementation in C:
* http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
*/
#ifndef __LC_SWITCH_H__
#define __LC_SWTICH_H__
/* WARNING! lc implementation using switch() does not work if an
LC_SET() is done within another switch() statement! */
/** \hideinitializer */
typedef unsigned short lc_t;
#define LC_INIT(s) s = 0;
#define LC_RESUME(s) switch(s) { case 0:
#define LC_SET(s) s = __LINE__; case __LINE__:
#define LC_END(s) }
#endif /* __LC_SWITCH_H__ */
/** @} */

131
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/lc.h Normal file
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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: lc.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup pt
* @{
*/
/**
* \defgroup lc Local continuations
* @{
*
* Local continuations form the basis for implementing protothreads. A
* local continuation can be <i>set</i> in a specific function to
* capture the state of the function. After a local continuation has
* been set can be <i>resumed</i> in order to restore the state of the
* function at the point where the local continuation was set.
*
*
*/
/**
* \file lc.h
* Local continuations
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifdef DOXYGEN
/**
* Initialize a local continuation.
*
* This operation initializes the local continuation, thereby
* unsetting any previously set continuation state.
*
* \hideinitializer
*/
#define LC_INIT(lc)
/**
* Set a local continuation.
*
* The set operation saves the state of the function at the point
* where the operation is executed. As far as the set operation is
* concerned, the state of the function does <b>not</b> include the
* call-stack or local (automatic) variables, but only the program
* counter and such CPU registers that needs to be saved.
*
* \hideinitializer
*/
#define LC_SET(lc)
/**
* Resume a local continuation.
*
* The resume operation resumes a previously set local continuation, thus
* restoring the state in which the function was when the local
* continuation was set. If the local continuation has not been
* previously set, the resume operation does nothing.
*
* \hideinitializer
*/
#define LC_RESUME(lc)
/**
* Mark the end of local continuation usage.
*
* The end operation signifies that local continuations should not be
* used any more in the function. This operation is not needed for
* most implementations of local continuation, but is required by a
* few implementations.
*
* \hideinitializer
*/
#define LC_END(lc)
/**
* \var typedef lc_t;
*
* The local continuation type.
*
* \hideinitializer
*/
#endif /* DOXYGEN */
#ifndef __LC_H__
#define __LC_H__
#ifdef LC_CONF_INCLUDE
#include LC_CONF_INCLUDE
#else
#include "lc-switch.h"
#endif /* LC_CONF_INCLUDE */
#endif /* __LC_H__ */
/** @} */
/** @} */

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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: psock.c,v 1.1 2007/01/04 11:06:40 adamdunkels Exp $
*/
#include <stdio.h>
#include <string.h>
#include "uipopt.h"
#include "psock.h"
#include "uip.h"
#define STATE_NONE 0
#define STATE_ACKED 1
#define STATE_READ 2
#define STATE_BLOCKED_NEWDATA 3
#define STATE_BLOCKED_CLOSE 4
#define STATE_BLOCKED_SEND 5
#define STATE_DATA_SENT 6
/*
* Return value of the buffering functions that indicates that a
* buffer was not filled by incoming data.
*
*/
#define BUF_NOT_FULL 0
#define BUF_NOT_FOUND 0
/*
* Return value of the buffering functions that indicates that a
* buffer was completely filled by incoming data.
*
*/
#define BUF_FULL 1
/*
* Return value of the buffering functions that indicates that an
* end-marker byte was found.
*
*/
#define BUF_FOUND 2
/*---------------------------------------------------------------------------*/
static void buf_setup( struct psock_buf *buf, u8_t *bufptr, u16_t bufsize )
{
buf->ptr = bufptr;
buf->left = bufsize;
}
/*---------------------------------------------------------------------------*/
static u8_t buf_bufdata( struct psock_buf *buf, u16_t len, u8_t **dataptr, u16_t *datalen )
{
( void ) len;
if( *datalen < buf->left )
{
memcpy( buf->ptr, *dataptr, *datalen );
buf->ptr += *datalen;
buf->left -= *datalen;
*dataptr += *datalen;
*datalen = 0;
return BUF_NOT_FULL;
}
else if( *datalen == buf->left )
{
memcpy( buf->ptr, *dataptr, *datalen );
buf->ptr += *datalen;
buf->left = 0;
*dataptr += *datalen;
*datalen = 0;
return BUF_FULL;
}
else
{
memcpy( buf->ptr, *dataptr, buf->left );
buf->ptr += buf->left;
*datalen -= buf->left;
*dataptr += buf->left;
buf->left = 0;
return BUF_FULL;
}
}
/*---------------------------------------------------------------------------*/
static u8_t buf_bufto( register struct psock_buf *buf, u8_t endmarker, register u8_t **dataptr, register u16_t *datalen )
{
u8_t c;
while( buf->left > 0 && *datalen > 0 )
{
c = *buf->ptr = **dataptr;
++ *dataptr;
++buf->ptr;
-- *datalen;
--buf->left;
if( c == endmarker )
{
return BUF_FOUND;
}
}
if( *datalen == 0 )
{
return BUF_NOT_FOUND;
}
while( *datalen > 0 )
{
c = **dataptr;
-- *datalen;
++ *dataptr;
if( c == endmarker )
{
return BUF_FOUND | BUF_FULL;
}
}
return BUF_FULL;
}
/*---------------------------------------------------------------------------*/
static char send_data( register struct psock *s )
{
if( s->state != STATE_DATA_SENT || uip_rexmit() )
{
if( s->sendlen > uip_mss() )
{
uip_send( s->sendptr, uip_mss() );
}
else
{
uip_send( s->sendptr, s->sendlen );
}
s->state = STATE_DATA_SENT;
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static char data_acked( register struct psock *s )
{
if( s->state == STATE_DATA_SENT && uip_acked() )
{
if( s->sendlen > uip_mss() )
{
s->sendlen -= uip_mss();
s->sendptr += uip_mss();
}
else
{
s->sendptr += s->sendlen;
s->sendlen = 0;
}
s->state = STATE_ACKED;
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
PT_THREAD( psock_send ( register struct psock *s, const char *buf, unsigned int len ) )
{
PT_BEGIN( &s->psockpt );
/* If there is no data to send, we exit immediately. */
if( len == 0 )
{
PT_EXIT( &s->psockpt );
}
/* Save the length of and a pointer to the data that is to be
sent. */
s->sendptr = ( u8_t * ) buf;
s->sendlen = len;
s->state = STATE_NONE;
/* We loop here until all data is sent. The s->sendlen variable is
updated by the data_sent() function. */
while( s->sendlen > 0 )
{
/*
* The condition for this PT_WAIT_UNTIL is a little tricky: the
* protothread will wait here until all data has been acknowledged
* (data_acked() returns true) and until all data has been sent
* (send_data() returns true). The two functions data_acked() and
* send_data() must be called in succession to ensure that all
* data is sent. Therefore the & operator is used instead of the
* && operator, which would cause only the data_acked() function
* to be called when it returns false.
*/
PT_WAIT_UNTIL( &s->psockpt, data_acked(s) & send_data(s) );
}
s->state = STATE_NONE;
PT_END( &s->psockpt );
}
/*---------------------------------------------------------------------------*/
PT_THREAD( psock_generator_send ( register struct psock *s, unsigned short ( *generate ) ( void * ), void *arg ) )
{
PT_BEGIN( &s->psockpt );
/* Ensure that there is a generator function to call. */
if( generate == NULL )
{
PT_EXIT( &s->psockpt );
}
/* Call the generator function to generate the data in the
uip_appdata buffer. */
s->sendlen = generate( arg );
s->sendptr = uip_appdata;
s->state = STATE_NONE;
do
{
/* Call the generator function again if we are called to perform a
retransmission. */
if( uip_rexmit() )
{
generate( arg );
}
/* Wait until all data is sent and acknowledged. */
PT_WAIT_UNTIL( &s->psockpt, data_acked(s) & send_data(s) );
} while( s->sendlen > 0 );
s->state = STATE_NONE;
PT_END( &s->psockpt );
}
/*---------------------------------------------------------------------------*/
u16_t psock_datalen( struct psock *psock )
{
return psock->bufsize - psock->buf.left;
}
/*---------------------------------------------------------------------------*/
char psock_newdata( struct psock *s )
{
if( s->readlen > 0 )
{
/* There is data in the uip_appdata buffer that has not yet been
read with the PSOCK_READ functions. */
return 1;
}
else if( s->state == STATE_READ )
{
/* All data in uip_appdata buffer already consumed. */
s->state = STATE_BLOCKED_NEWDATA;
return 0;
}
else if( uip_newdata() )
{
/* There is new data that has not been consumed. */
return 1;
}
else
{
/* There is no new data. */
return 0;
}
}
/*---------------------------------------------------------------------------*/
PT_THREAD( psock_readto ( register struct psock *psock, unsigned char c ) )
{
PT_BEGIN( &psock->psockpt );
buf_setup( &psock->buf, ( u8_t * ) psock->bufptr, psock->bufsize );
/* XXX: Should add buf_checkmarker() before do{} loop, if
incoming data has been handled while waiting for a write. */
do
{
if( psock->readlen == 0 )
{
PT_WAIT_UNTIL( &psock->psockpt, psock_newdata(psock) );
psock->state = STATE_READ;
psock->readptr = ( u8_t * ) uip_appdata;
psock->readlen = uip_datalen();
}
} while( (buf_bufto(&psock->buf, c, &psock->readptr, &psock->readlen) & BUF_FOUND) == 0 );
if( psock_datalen(psock) == 0 )
{
psock->state = STATE_NONE;
PT_RESTART( &psock->psockpt );
}
PT_END( &psock->psockpt );
}
/*---------------------------------------------------------------------------*/
PT_THREAD( psock_readbuf ( register struct psock *psock ) )
{
PT_BEGIN( &psock->psockpt );
buf_setup( &psock->buf, ( u8_t * ) psock->bufptr, psock->bufsize );
/* XXX: Should add buf_checkmarker() before do{} loop, if
incoming data has been handled while waiting for a write. */
do
{
if( psock->readlen == 0 )
{
PT_WAIT_UNTIL( &psock->psockpt, psock_newdata(psock) );
printf( "Waited for newdata\n" );
psock->state = STATE_READ;
psock->readptr = ( u8_t * ) uip_appdata;
psock->readlen = uip_datalen();
}
} while( buf_bufdata(&psock->buf, psock->bufsize, &psock->readptr, &psock->readlen) != BUF_FULL );
if( psock_datalen(psock) == 0 )
{
psock->state = STATE_NONE;
PT_RESTART( &psock->psockpt );
}
PT_END( &psock->psockpt );
}
/*---------------------------------------------------------------------------*/
void psock_init( register struct psock *psock, char *buffer, unsigned int buffersize )
{
psock->state = STATE_NONE;
psock->readlen = 0;
psock->bufptr = buffer;
psock->bufsize = buffersize;
buf_setup( &psock->buf, ( u8_t * ) buffer, buffersize );
PT_INIT( &psock->pt );
PT_INIT( &psock->psockpt );
}
/*---------------------------------------------------------------------------*/

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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: psock.h,v 1.3 2006/06/12 08:00:30 adam Exp $
*/
/**
* \defgroup psock Protosockets library
* @{
*
* The protosocket library provides an interface to the uIP stack that is
* similar to the traditional BSD socket interface. Unlike programs
* written for the ordinary uIP event-driven interface, programs
* written with the protosocket library are executed in a sequential
* fashion and does not have to be implemented as explicit state
* machines.
*
* Protosockets only work with TCP connections.
*
* The protosocket library uses \ref pt protothreads to provide
* sequential control flow. This makes the protosockets lightweight in
* terms of memory, but also means that protosockets inherits the
* functional limitations of protothreads. Each protosocket lives only
* within a single function. Automatic variables (stack variables) are
* not retained across a protosocket library function call.
*
* \note Because the protosocket library uses protothreads, local
* variables will not always be saved across a call to a protosocket
* library function. It is therefore advised that local variables are
* used with extreme care.
*
* The protosocket library provides functions for sending data without
* having to deal with retransmissions and acknowledgements, as well
* as functions for reading data without having to deal with data
* being split across more than one TCP segment.
*
* Because each protosocket runs as a protothread, the protosocket has to be
* started with a call to PSOCK_BEGIN() at the start of the function
* in which the protosocket is used. Similarly, the protosocket protothread can
* be terminated by a call to PSOCK_EXIT().
*
*/
/**
* \file
* Protosocket library header file
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifndef __PSOCK_H__
#define __PSOCK_H__
#include "uipopt.h"
#include "pt.h"
/*
* The structure that holds the state of a buffer.
*
* This structure holds the state of a uIP buffer. The structure has
* no user-visible elements, but is used through the functions
* provided by the library.
*
*/
struct psock_buf {
u8_t *ptr;
unsigned short left;
};
/**
* The representation of a protosocket.
*
* The protosocket structrure is an opaque structure with no user-visible
* elements.
*/
struct psock {
struct pt pt, psockpt; /* Protothreads - one that's using the psock
functions, and one that runs inside the
psock functions. */
const u8_t *sendptr; /* Pointer to the next data to be sent. */
u8_t *readptr; /* Pointer to the next data to be read. */
char *bufptr; /* Pointer to the buffer used for buffering
incoming data. */
u16_t sendlen; /* The number of bytes left to be sent. */
u16_t readlen; /* The number of bytes left to be read. */
struct psock_buf buf; /* The structure holding the state of the
input buffer. */
unsigned int bufsize; /* The size of the input buffer. */
unsigned char state; /* The state of the protosocket. */
};
void psock_init(struct psock *psock, char *buffer, unsigned int buffersize);
/**
* Initialize a protosocket.
*
* This macro initializes a protosocket and must be called before the
* protosocket is used. The initialization also specifies the input buffer
* for the protosocket.
*
* \param psock (struct psock *) A pointer to the protosocket to be
* initialized
*
* \param buffer (char *) A pointer to the input buffer for the
* protosocket.
*
* \param buffersize (unsigned int) The size of the input buffer.
*
* \hideinitializer
*/
#define PSOCK_INIT(psock, buffer, buffersize) \
psock_init(psock, buffer, buffersize)
/**
* Start the protosocket protothread in a function.
*
* This macro starts the protothread associated with the protosocket and
* must come before other protosocket calls in the function it is used.
*
* \param psock (struct psock *) A pointer to the protosocket to be
* started.
*
* \hideinitializer
*/
#define PSOCK_BEGIN(psock) PT_BEGIN(&((psock)->pt))
PT_THREAD(psock_send(struct psock *psock, const char *buf, unsigned int len));
/**
* Send data.
*
* This macro sends data over a protosocket. The protosocket protothread blocks
* until all data has been sent and is known to have been received by
* the remote end of the TCP connection.
*
* \param psock (struct psock *) A pointer to the protosocket over which
* data is to be sent.
*
* \param data (char *) A pointer to the data that is to be sent.
*
* \param datalen (unsigned int) The length of the data that is to be
* sent.
*
* \hideinitializer
*/
#define PSOCK_SEND(psock, data, datalen) \
PT_WAIT_THREAD(&((psock)->pt), psock_send(psock, data, datalen))
/**
* \brief Send a null-terminated string.
* \param psock Pointer to the protosocket.
* \param str The string to be sent.
*
* This function sends a null-terminated string over the
* protosocket.
*
* \hideinitializer
*/
#define PSOCK_SEND_STR(psock, str) \
PT_WAIT_THREAD(&((psock)->pt), psock_send(psock, str, strlen(str)))
PT_THREAD(psock_generator_send(struct psock *psock,
unsigned short (*f)(void *), void *arg));
/**
* \brief Generate data with a function and send it
* \param psock Pointer to the protosocket.
* \param generator Pointer to the generator function
* \param arg Argument to the generator function
*
* This function generates data and sends it over the
* protosocket. This can be used to dynamically generate
* data for a transmission, instead of generating the data
* in a buffer beforehand. This function reduces the need for
* buffer memory. The generator function is implemented by
* the application, and a pointer to the function is given
* as an argument with the call to PSOCK_GENERATOR_SEND().
*
* The generator function should place the generated data
* directly in the uip_appdata buffer, and return the
* length of the generated data. The generator function is
* called by the protosocket layer when the data first is
* sent, and once for every retransmission that is needed.
*
* \hideinitializer
*/
#define PSOCK_GENERATOR_SEND(psock, generator, arg) \
PT_WAIT_THREAD(&((psock)->pt), \
psock_generator_send(psock, generator, arg))
/**
* Close a protosocket.
*
* This macro closes a protosocket and can only be called from within the
* protothread in which the protosocket lives.
*
* \param psock (struct psock *) A pointer to the protosocket that is to
* be closed.
*
* \hideinitializer
*/
#define PSOCK_CLOSE(psock) uip_close()
PT_THREAD(psock_readbuf(struct psock *psock));
/**
* Read data until the buffer is full.
*
* This macro will block waiting for data and read the data into the
* input buffer specified with the call to PSOCK_INIT(). Data is read
* until the buffer is full..
*
* \param psock (struct psock *) A pointer to the protosocket from which
* data should be read.
*
* \hideinitializer
*/
#define PSOCK_READBUF(psock) \
PT_WAIT_THREAD(&((psock)->pt), psock_readbuf(psock))
PT_THREAD(psock_readto(struct psock *psock, unsigned char c));
/**
* Read data up to a specified character.
*
* This macro will block waiting for data and read the data into the
* input buffer specified with the call to PSOCK_INIT(). Data is only
* read until the specifieed character appears in the data stream.
*
* \param psock (struct psock *) A pointer to the protosocket from which
* data should be read.
*
* \param c (char) The character at which to stop reading.
*
* \hideinitializer
*/
#define PSOCK_READTO(psock, c) \
PT_WAIT_THREAD(&((psock)->pt), psock_readto(psock, c))
/**
* The length of the data that was previously read.
*
* This macro returns the length of the data that was previously read
* using PSOCK_READTO() or PSOCK_READ().
*
* \param psock (struct psock *) A pointer to the protosocket holding the data.
*
* \hideinitializer
*/
#define PSOCK_DATALEN(psock) psock_datalen(psock)
u16_t psock_datalen(struct psock *psock);
/**
* Exit the protosocket's protothread.
*
* This macro terminates the protothread of the protosocket and should
* almost always be used in conjunction with PSOCK_CLOSE().
*
* \sa PSOCK_CLOSE_EXIT()
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_EXIT(psock) PT_EXIT(&((psock)->pt))
/**
* Close a protosocket and exit the protosocket's protothread.
*
* This macro closes a protosocket and exits the protosocket's protothread.
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_CLOSE_EXIT(psock) \
do { \
PSOCK_CLOSE(psock); \
PSOCK_EXIT(psock); \
} while(0)
/**
* Declare the end of a protosocket's protothread.
*
* This macro is used for declaring that the protosocket's protothread
* ends. It must always be used together with a matching PSOCK_BEGIN()
* macro.
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_END(psock) PT_END(&((psock)->pt))
char psock_newdata(struct psock *s);
/**
* Check if new data has arrived on a protosocket.
*
* This macro is used in conjunction with the PSOCK_WAIT_UNTIL()
* macro to check if data has arrived on a protosocket.
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_NEWDATA(psock) psock_newdata(psock)
/**
* Wait until a condition is true.
*
* This macro blocks the protothread until the specified condition is
* true. The macro PSOCK_NEWDATA() can be used to check if new data
* arrives when the protosocket is waiting.
*
* Typically, this macro is used as follows:
*
\code
PT_THREAD(thread(struct psock *s, struct timer *t))
{
PSOCK_BEGIN(s);
PSOCK_WAIT_UNTIL(s, PSOCK_NEWADATA(s) || timer_expired(t));
if(PSOCK_NEWDATA(s)) {
PSOCK_READTO(s, '\n');
} else {
handle_timed_out(s);
}
PSOCK_END(s);
}
\endcode
*
* \param psock (struct psock *) A pointer to the protosocket.
* \param condition The condition to wait for.
*
* \hideinitializer
*/
#define PSOCK_WAIT_UNTIL(psock, condition) \
PT_WAIT_UNTIL(&((psock)->pt), (condition));
#define PSOCK_WAIT_THREAD(psock, condition) \
PT_WAIT_THREAD(&((psock)->pt), (condition))
#endif /* __PSOCK_H__ */
/** @} */

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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: pt.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup pt
* @{
*/
/**
* \file
* Protothreads implementation.
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifndef __PT_H__
#define __PT_H__
#include "lc.h"
struct pt {
lc_t lc;
};
#define PT_WAITING 0
#define PT_EXITED 1
#define PT_ENDED 2
#define PT_YIELDED 3
/**
* \name Initialization
* @{
*/
/**
* Initialize a protothread.
*
* Initializes a protothread. Initialization must be done prior to
* starting to execute the protothread.
*
* \param pt A pointer to the protothread control structure.
*
* \sa PT_SPAWN()
*
* \hideinitializer
*/
#define PT_INIT(pt) LC_INIT((pt)->lc)
/** @} */
/**
* \name Declaration and definition
* @{
*/
/**
* Declaration of a protothread.
*
* This macro is used to declare a protothread. All protothreads must
* be declared with this macro.
*
* \param name_args The name and arguments of the C function
* implementing the protothread.
*
* \hideinitializer
*/
#define PT_THREAD(name_args) char name_args
/**
* Declare the start of a protothread inside the C function
* implementing the protothread.
*
* This macro is used to declare the starting point of a
* protothread. It should be placed at the start of the function in
* which the protothread runs. All C statements above the PT_BEGIN()
* invokation will be executed each time the protothread is scheduled.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_BEGIN(pt) { char PT_YIELD_FLAG = 1; LC_RESUME((pt)->lc)
/**
* Declare the end of a protothread.
*
* This macro is used for declaring that a protothread ends. It must
* always be used together with a matching PT_BEGIN() macro.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_END(pt) LC_END((pt)->lc); PT_YIELD_FLAG = 0; \
PT_INIT(pt); return PT_ENDED; }
/** @} */
/**
* \name Blocked wait
* @{
*/
/**
* Block and wait until condition is true.
*
* This macro blocks the protothread until the specified condition is
* true.
*
* \param pt A pointer to the protothread control structure.
* \param condition The condition.
*
* \hideinitializer
*/
#define PT_WAIT_UNTIL(pt, condition) \
do { \
LC_SET((pt)->lc); \
if(!(condition)) { \
return PT_WAITING; \
} \
} while(0)
/**
* Block and wait while condition is true.
*
* This function blocks and waits while condition is true. See
* PT_WAIT_UNTIL().
*
* \param pt A pointer to the protothread control structure.
* \param cond The condition.
*
* \hideinitializer
*/
#define PT_WAIT_WHILE(pt, cond) PT_WAIT_UNTIL((pt), !(cond))
/** @} */
/**
* \name Hierarchical protothreads
* @{
*/
/**
* Block and wait until a child protothread completes.
*
* This macro schedules a child protothread. The current protothread
* will block until the child protothread completes.
*
* \note The child protothread must be manually initialized with the
* PT_INIT() function before this function is used.
*
* \param pt A pointer to the protothread control structure.
* \param thread The child protothread with arguments
*
* \sa PT_SPAWN()
*
* \hideinitializer
*/
#define PT_WAIT_THREAD(pt, thread) PT_WAIT_WHILE((pt), PT_SCHEDULE(thread))
/**
* Spawn a child protothread and wait until it exits.
*
* This macro spawns a child protothread and waits until it exits. The
* macro can only be used within a protothread.
*
* \param pt A pointer to the protothread control structure.
* \param child A pointer to the child protothread's control structure.
* \param thread The child protothread with arguments
*
* \hideinitializer
*/
#define PT_SPAWN(pt, child, thread) \
do { \
PT_INIT((child)); \
PT_WAIT_THREAD((pt), (thread)); \
} while(0)
/** @} */
/**
* \name Exiting and restarting
* @{
*/
/**
* Restart the protothread.
*
* This macro will block and cause the running protothread to restart
* its execution at the place of the PT_BEGIN() call.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_RESTART(pt) \
do { \
PT_INIT(pt); \
return PT_WAITING; \
} while(0)
/**
* Exit the protothread.
*
* This macro causes the protothread to exit. If the protothread was
* spawned by another protothread, the parent protothread will become
* unblocked and can continue to run.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_EXIT(pt) \
do { \
PT_INIT(pt); \
return PT_EXITED; \
} while(0)
/** @} */
/**
* \name Calling a protothread
* @{
*/
/**
* Schedule a protothread.
*
* This function shedules a protothread. The return value of the
* function is non-zero if the protothread is running or zero if the
* protothread has exited.
*
* \param f The call to the C function implementing the protothread to
* be scheduled
*
* \hideinitializer
*/
#define PT_SCHEDULE(f) ((f) == PT_WAITING)
/** @} */
/**
* \name Yielding from a protothread
* @{
*/
/**
* Yield from the current protothread.
*
* This function will yield the protothread, thereby allowing other
* processing to take place in the system.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_YIELD(pt) \
do { \
PT_YIELD_FLAG = 0; \
LC_SET((pt)->lc); \
if(PT_YIELD_FLAG == 0) { \
return PT_YIELDED; \
} \
} while(0)
/**
* \brief Yield from the protothread until a condition occurs.
* \param pt A pointer to the protothread control structure.
* \param cond The condition.
*
* This function will yield the protothread, until the
* specified condition evaluates to true.
*
*
* \hideinitializer
*/
#define PT_YIELD_UNTIL(pt, cond) \
do { \
PT_YIELD_FLAG = 0; \
LC_SET((pt)->lc); \
if((PT_YIELD_FLAG == 0) || !(cond)) { \
return PT_YIELDED; \
} \
} while(0)
/** @} */
#endif /* __PT_H__ */
/** @} */

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/**
* \addtogroup timer
* @{
*/
/**
* \file
* Timer library implementation.
* \author
* Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: timer.c,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
#include "clock.h"
#include "uip_timer.h"
/*---------------------------------------------------------------------------*/
/**
* Set a timer.
*
* This function is used to set a timer for a time sometime in the
* future. The function timer_expired() will evaluate to true after
* the timer has expired.
*
* \param t A pointer to the timer
* \param interval The interval before the timer expires.
*
*/
void timer_set( struct timer *t, clock_time_t interval )
{
t->interval = interval;
t->start = clock_time();
}
/*---------------------------------------------------------------------------*/
/**
* Reset the timer with the same interval.
*
* This function resets the timer with the same interval that was
* given to the timer_set() function. The start point of the interval
* is the exact time that the timer last expired. Therefore, this
* function will cause the timer to be stable over time, unlike the
* timer_rester() function.
*
* \param t A pointer to the timer.
*
* \sa timer_restart()
*/
void timer_reset( struct timer *t )
{
t->start += t->interval;
}
/*---------------------------------------------------------------------------*/
/**
* Restart the timer from the current point in time
*
* This function restarts a timer with the same interval that was
* given to the timer_set() function. The timer will start at the
* current time.
*
* \note A periodic timer will drift if this function is used to reset
* it. For preioric timers, use the timer_reset() function instead.
*
* \param t A pointer to the timer.
*
* \sa timer_reset()
*/
void timer_restart( struct timer *t )
{
t->start = clock_time();
}
/*---------------------------------------------------------------------------*/
/**
* Check if a timer has expired.
*
* This function tests if a timer has expired and returns true or
* false depending on its status.
*
* \param t A pointer to the timer
*
* \return Non-zero if the timer has expired, zero otherwise.
*
*/
int timer_expired( struct timer *t )
{
return( clock_time_t ) ( clock_time() - t->start ) >= ( clock_time_t ) t->interval;
}
/*---------------------------------------------------------------------------*/
/** @} */

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/**
* \defgroup timer Timer library
*
* The timer library provides functions for setting, resetting and
* restarting timers, and for checking if a timer has expired. An
* application must "manually" check if its timers have expired; this
* is not done automatically.
*
* A timer is declared as a \c struct \c timer and all access to the
* timer is made by a pointer to the declared timer.
*
* \note The timer library uses the \ref clock "Clock library" to
* measure time. Intervals should be specified in the format used by
* the clock library.
*
* @{
*/
/**
* \file
* Timer library header file.
* \author
* Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: timer.h,v 1.3 2006/06/11 21:46:39 adam Exp $
*/
#ifndef __TIMER_H__
#define __TIMER_H__
#include "clock.h"
/**
* A timer.
*
* This structure is used for declaring a timer. The timer must be set
* with timer_set() before it can be used.
*
* \hideinitializer
*/
struct timer {
clock_time_t start;
clock_time_t interval;
};
void timer_set(struct timer *t, clock_time_t interval);
void timer_reset(struct timer *t);
void timer_restart(struct timer *t);
int timer_expired(struct timer *t);
#endif /* __TIMER_H__ */
/** @} */

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/**
* \addtogroup uipfw
* @{
*/
/**
* \file
* uIP packet forwarding header file.
* \author Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: uip-fw.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
#ifndef __UIP_FW_H__
#define __UIP_FW_H__
#include "uip.h"
/**
* Representation of a uIP network interface.
*/
struct uip_fw_netif {
struct uip_fw_netif *next; /**< Pointer to the next interface when
linked in a list. */
u16_t ipaddr[2]; /**< The IP address of this interface. */
u16_t netmask[2]; /**< The netmask of the interface. */
u8_t (* output)(void);
/**< A pointer to the function that
sends a packet. */
};
/**
* Intantiating macro for a uIP network interface.
*
* Example:
\code
struct uip_fw_netif slipnetif =
{UIP_FW_NETIF(192,168,76,1, 255,255,255,0, slip_output)};
\endcode
* \param ip1,ip2,ip3,ip4 The IP address of the network interface.
*
* \param nm1,nm2,nm3,nm4 The netmask of the network interface.
*
* \param outputfunc A pointer to the output function of the network interface.
*
* \hideinitializer
*/
#define UIP_FW_NETIF(ip1,ip2,ip3,ip4, nm1,nm2,nm3,nm4, outputfunc) \
NULL, \
{HTONS((ip1 << 8) | ip2), HTONS((ip3 << 8) | ip4)}, \
{HTONS((nm1 << 8) | nm2), HTONS((nm3 << 8) | nm4)}, \
outputfunc
/**
* Set the IP address of a network interface.
*
* \param netif A pointer to the uip_fw_netif structure for the network interface.
*
* \param addr A pointer to an IP address.
*
* \hideinitializer
*/
#define uip_fw_setipaddr(netif, addr) \
do { (netif)->ipaddr[0] = ((u16_t *)(addr))[0]; \
(netif)->ipaddr[1] = ((u16_t *)(addr))[1]; } while(0)
/**
* Set the netmask of a network interface.
*
* \param netif A pointer to the uip_fw_netif structure for the network interface.
*
* \param addr A pointer to an IP address representing the netmask.
*
* \hideinitializer
*/
#define uip_fw_setnetmask(netif, addr) \
do { (netif)->netmask[0] = ((u16_t *)(addr))[0]; \
(netif)->netmask[1] = ((u16_t *)(addr))[1]; } while(0)
void uip_fw_init(void);
u8_t uip_fw_forward(void);
u8_t uip_fw_output(void);
void uip_fw_register(struct uip_fw_netif *netif);
void uip_fw_default(struct uip_fw_netif *netif);
void uip_fw_periodic(void);
/**
* A non-error message that indicates that a packet should be
* processed locally.
*
* \hideinitializer
*/
#define UIP_FW_LOCAL 0
/**
* A non-error message that indicates that something went OK.
*
* \hideinitializer
*/
#define UIP_FW_OK 0
/**
* A non-error message that indicates that a packet was forwarded.
*
* \hideinitializer
*/
#define UIP_FW_FORWARDED 1
/**
* A non-error message that indicates that a zero-length packet
* transmission was attempted, and that no packet was sent.
*
* \hideinitializer
*/
#define UIP_FW_ZEROLEN 2
/**
* An error message that indicates that a packet that was too large
* for the outbound network interface was detected.
*
* \hideinitializer
*/
#define UIP_FW_TOOLARGE 3
/**
* An error message that indicates that no suitable interface could be
* found for an outbound packet.
*
* \hideinitializer
*/
#define UIP_FW_NOROUTE 4
/**
* An error message that indicates that a packet that should be
* forwarded or output was dropped.
*
* \hideinitializer
*/
#define UIP_FW_DROPPED 5
#endif /* __UIP_FW_H__ */
/** @} */

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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* $Id: uip-neighbor.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \file
* Header file for database of link-local neighbors, used by
* IPv6 code and to be used by future ARP code.
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef __UIP_NEIGHBOR_H__
#define __UIP_NEIGHBOR_H__
#include "uip.h"
struct uip_neighbor_addr {
#if UIP_NEIGHBOR_CONF_ADDRTYPE
UIP_NEIGHBOR_CONF_ADDRTYPE addr;
#else
struct uip_eth_addr addr;
#endif
};
void uip_neighbor_init(void);
void uip_neighbor_add(uip_ipaddr_t ipaddr, struct uip_neighbor_addr *addr);
void uip_neighbor_update(uip_ipaddr_t ipaddr);
struct uip_neighbor_addr *uip_neighbor_lookup(uip_ipaddr_t ipaddr);
void uip_neighbor_periodic(void);
#endif /* __UIP-NEIGHBOR_H__ */

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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: uip-split.c,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
#include <string.h>
#include "uip-split.h"
#include "uip.h"
#include "uip-fw.h"
#include "uip_arch.h"
#define BUF ( ( struct uip_tcpip_hdr * ) &uip_buf[UIP_LLH_LEN] )
/*-----------------------------------------------------------------------------*/
void uip_split_output( void )
{
u16_t tcplen, len1, len2;
/* We only try to split maximum sized TCP segments. */
if( BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE - UIP_LLH_LEN )
{
tcplen = uip_len - UIP_TCPIP_HLEN;
/* Split the segment in two. If the original packet length was
odd, we make the second packet one byte larger. */
len1 = len2 = tcplen / 2;
if( len1 + len2 < tcplen )
{
++len2;
}
/* Create the first packet. This is done by altering the length
field of the IP header and updating the checksums. */
uip_len = len1 + UIP_TCPIP_HLEN;
#if UIP_CONF_IPV6
/* For IPv6, the IP length field does not include the IPv6 IP header
length. */
BUF->len[0] = ( (uip_len - UIP_IPH_LEN) >> 8 );
BUF->len[1] = ( (uip_len - UIP_IPH_LEN) & 0xff );
#else /* UIP_CONF_IPV6 */
BUF->len[0] = uip_len >> 8;
BUF->len[1] = uip_len & 0xff;
#endif /* UIP_CONF_IPV6 */
/* Recalculate the TCP checksum. */
BUF->tcpchksum = 0;
BUF->tcpchksum = ~( uip_tcpchksum() );
#if !UIP_CONF_IPV6
/* Recalculate the IP checksum. */
BUF->ipchksum = 0;
BUF->ipchksum = ~( uip_ipchksum() );
#endif /* UIP_CONF_IPV6 */
/* Transmit the first packet. */
/* uip_fw_output();*/
// tcpip_output();
/* Now, create the second packet. To do this, it is not enough to
just alter the length field, but we must also update the TCP
sequence number and point the uip_appdata to a new place in
memory. This place is detemined by the length of the first
packet (len1). */
uip_len = len2 + UIP_TCPIP_HLEN;
#if UIP_CONF_IPV6
/* For IPv6, the IP length field does not include the IPv6 IP header
length. */
BUF->len[0] = ( (uip_len - UIP_IPH_LEN) >> 8 );
BUF->len[1] = ( (uip_len - UIP_IPH_LEN) & 0xff );
#else /* UIP_CONF_IPV6 */
BUF->len[0] = uip_len >> 8;
BUF->len[1] = uip_len & 0xff;
#endif /* UIP_CONF_IPV6 */
/* uip_appdata += len1;*/
memcpy( uip_appdata, ( u8_t * ) uip_appdata + len1, len2 );
uip_add32( BUF->seqno, len1 );
BUF->seqno[0] = uip_acc32[0];
BUF->seqno[1] = uip_acc32[1];
BUF->seqno[2] = uip_acc32[2];
BUF->seqno[3] = uip_acc32[3];
/* Recalculate the TCP checksum. */
BUF->tcpchksum = 0;
BUF->tcpchksum = ~( uip_tcpchksum() );
#if !UIP_CONF_IPV6
/* Recalculate the IP checksum. */
BUF->ipchksum = 0;
BUF->ipchksum = ~( uip_ipchksum() );
#endif /* UIP_CONF_IPV6 */
/* Transmit the second packet. */
/* uip_fw_output();*/
// tcpip_output();
}
else
{
/* uip_fw_output();*/
// tcpip_output();
}
}
/*-----------------------------------------------------------------------------*/

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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: uip-split.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup uip
* @{
*/
/**
* \defgroup uipsplit uIP TCP throughput booster hack
* @{
*
* The basic uIP TCP implementation only allows each TCP connection to
* have a single TCP segment in flight at any given time. Because of
* the delayed ACK algorithm employed by most TCP receivers, uIP's
* limit on the amount of in-flight TCP segments seriously reduces the
* maximum achievable throughput for sending data from uIP.
*
* The uip-split module is a hack which tries to remedy this
* situation. By splitting maximum sized outgoing TCP segments into
* two, the delayed ACK algorithm is not invoked at TCP
* receivers. This improves the throughput when sending data from uIP
* by orders of magnitude.
*
* The uip-split module uses the uip-fw module (uIP IP packet
* forwarding) for sending packets. Therefore, the uip-fw module must
* be set up with the appropriate network interfaces for this module
* to work.
*/
/**
* \file
* Module for splitting outbound TCP segments in two to avoid the
* delayed ACK throughput degradation.
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifndef __UIP_SPLIT_H__
#define __UIP_SPLIT_H__
/**
* Handle outgoing packets.
*
* This function inspects an outgoing packet in the uip_buf buffer and
* sends it out using the uip_fw_output() function. If the packet is a
* full-sized TCP segment it will be split into two segments and
* transmitted separately. This function should be called instead of
* the actual device driver output function, or the uip_fw_output()
* function.
*
* The headers of the outgoing packet is assumed to be in the uip_buf
* buffer and the payload is assumed to be wherever uip_appdata
* points. The length of the outgoing packet is assumed to be in the
* uip_len variable.
*
*/
void uip_split_output(void);
#endif /* __UIP_SPLIT_H__ */
/** @} */
/** @} */

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/**
* \addtogroup uip
* {@
*/
/**
* \defgroup uiparch Architecture specific uIP functions
* @{
*
* The functions in the architecture specific module implement the IP
* check sum and 32-bit additions.
*
* The IP checksum calculation is the most computationally expensive
* operation in the TCP/IP stack and it therefore pays off to
* implement this in efficient assembler. The purpose of the uip-arch
* module is to let the checksum functions to be implemented in
* architecture specific assembler.
*
*/
/**
* \file
* Declarations of architecture specific functions.
* \author Adam Dunkels <adam@dunkels.com>
*/
/*
* Copyright (c) 2001, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip_arch.h,v 1.2 2006/06/07 09:15:19 adam Exp $
*
*/
#ifndef __UIP_ARCH_H__
#define __UIP_ARCH_H__
#include "uip.h"
/**
* Carry out a 32-bit addition.
*
* Because not all architectures for which uIP is intended has native
* 32-bit arithmetic, uIP uses an external C function for doing the
* required 32-bit additions in the TCP protocol processing. This
* function should add the two arguments and place the result in the
* global variable uip_acc32.
*
* \note The 32-bit integer pointed to by the op32 parameter and the
* result in the uip_acc32 variable are in network byte order (big
* endian).
*
* \param op32 A pointer to a 4-byte array representing a 32-bit
* integer in network byte order (big endian).
*
* \param op16 A 16-bit integer in host byte order.
*/
void uip_add32(u8_t *op32, u16_t op16);
/**
* Calculate the Internet checksum over a buffer.
*
* The Internet checksum is the one's complement of the one's
* complement sum of all 16-bit words in the buffer.
*
* See RFC1071.
*
* \note This function is not called in the current version of uIP,
* but future versions might make use of it.
*
* \param buf A pointer to the buffer over which the checksum is to be
* computed.
*
* \param len The length of the buffer over which the checksum is to
* be computed.
*
* \return The Internet checksum of the buffer.
*/
u16_t uip_chksum(u16_t *buf, u16_t len);
/**
* Calculate the IP header checksum of the packet header in uip_buf.
*
* The IP header checksum is the Internet checksum of the 20 bytes of
* the IP header.
*
* \return The IP header checksum of the IP header in the uip_buf
* buffer.
*/
u16_t uip_ipchksum(void);
/**
* Calculate the TCP checksum of the packet in uip_buf and uip_appdata.
*
* The TCP checksum is the Internet checksum of data contents of the
* TCP segment, and a pseudo-header as defined in RFC793.
*
* \note The uip_appdata pointer that points to the packet data may
* point anywhere in memory, so it is not possible to simply calculate
* the Internet checksum of the contents of the uip_buf buffer.
*
* \return The TCP checksum of the TCP segment in uip_buf and pointed
* to by uip_appdata.
*/
u16_t uip_tcpchksum(void);
u16_t uip_udpchksum(void);
/** @} */
/** @} */
#endif /* __UIP_ARCH_H__ */

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/**
* \addtogroup uip
* @{
*/
/**
* \defgroup uiparp uIP Address Resolution Protocol
* @{
*
* The Address Resolution Protocol ARP is used for mapping between IP
* addresses and link level addresses such as the Ethernet MAC
* addresses. ARP uses broadcast queries to ask for the link level
* address of a known IP address and the host which is configured with
* the IP address for which the query was meant, will respond with its
* link level address.
*
* \note This ARP implementation only supports Ethernet.
*/
/**
* \file
* Implementation of the ARP Address Resolution Protocol.
* \author Adam Dunkels <adam@dunkels.com>
*
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip_arp.c,v 1.8 2006/06/02 23:36:21 adam Exp $
*
*/
#include "uip_arp.h"
#include <string.h>
#ifdef __ICCARM__
#pragma pack( 1 )
#endif
struct arp_hdr
{
struct uip_eth_hdr ethhdr;
u16_t hwtype;
u16_t protocol;
u8_t hwlen;
u8_t protolen;
u16_t opcode;
struct uip_eth_addr shwaddr;
u16_t sipaddr[2];
struct uip_eth_addr dhwaddr;
u16_t dipaddr[2];
} PACK_STRUCT_END;
#ifdef __ICCARM__
#pragma pack()
#endif
#ifdef __ICCARM__
#pragma pack( 1 )
#endif
struct ethip_hdr
{
struct uip_eth_hdr ethhdr;
/* IP header. */
u8_t vhl, tos, len[2], ipid[2], ipoffset[2], ttl, proto;
u16_t ipchksum;
u16_t srcipaddr[2], destipaddr[2];
} PACK_STRUCT_END;
#ifdef __ICCARM__
#pragma pack()
#endif
#define ARP_REQUEST 1
#define ARP_REPLY 2
#define ARP_HWTYPE_ETH 1
struct arp_entry
{
u16_t ipaddr[2];
struct uip_eth_addr ethaddr;
u8_t time;
};
static const struct uip_eth_addr broadcast_ethaddr = { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
static const u16_t broadcast_ipaddr[2] = { 0xffff, 0xffff };
static struct arp_entry arp_table[UIP_ARPTAB_SIZE];
static u16_t ipaddr[2];
static u8_t i, c;
static u8_t arptime;
static u8_t tmpage;
#define BUF ( ( struct arp_hdr * ) &uip_buf[0] )
#define IPBUF ( ( struct ethip_hdr * ) &uip_buf[0] )
/*-----------------------------------------------------------------------------------*/
/**
* Initialize the ARP module.
*
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_init( void )
{
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
memset( arp_table[i].ipaddr, 0, 4 );
}
}
/*-----------------------------------------------------------------------------------*/
/**
* Periodic ARP processing function.
*
* This function performs periodic timer processing in the ARP module
* and should be called at regular intervals. The recommended interval
* is 10 seconds between the calls.
*
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_timer( void )
{
struct arp_entry *tabptr;
++arptime;
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( (tabptr->ipaddr[0] | tabptr->ipaddr[1]) != 0 && arptime - tabptr->time >= UIP_ARP_MAXAGE )
{
memset( tabptr->ipaddr, 0, 4 );
}
}
}
/*-----------------------------------------------------------------------------------*/
static void uip_arp_update( u16_t *ipaddr, struct uip_eth_addr *ethaddr )
{
register struct arp_entry *tabptr;
/* Walk through the ARP mapping table and try to find an entry to
update. If none is found, the IP -> MAC address mapping is
inserted in the ARP table. */
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
/* Only check those entries that are actually in use. */
if( tabptr->ipaddr[0] != 0 && tabptr->ipaddr[1] != 0 )
{
/* Check if the source IP address of the incoming packet matches
the IP address in this ARP table entry. */
if( ipaddr[0] == tabptr->ipaddr[0] && ipaddr[1] == tabptr->ipaddr[1] )
{
/* An old entry found, update this and return. */
memcpy( tabptr->ethaddr.addr, ethaddr->addr, 6 );
tabptr->time = arptime;
return;
}
}
}
/* If we get here, no existing ARP table entry was found, so we
create one. */
/* First, we try to find an unused entry in the ARP table. */
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( tabptr->ipaddr[0] == 0 && tabptr->ipaddr[1] == 0 )
{
break;
}
}
/* If no unused entry is found, we try to find the oldest entry and
throw it away. */
if( i == UIP_ARPTAB_SIZE )
{
tmpage = 0;
c = 0;
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( arptime - tabptr->time > tmpage )
{
tmpage = arptime - tabptr->time;
c = i;
}
}
i = c;
tabptr = &arp_table[i];
}
/* Now, i is the ARP table entry which we will fill with the new
information. */
memcpy( tabptr->ipaddr, ipaddr, 4 );
memcpy( tabptr->ethaddr.addr, ethaddr->addr, 6 );
tabptr->time = arptime;
}
/*-----------------------------------------------------------------------------------*/
/**
* ARP processing for incoming IP packets
*
* This function should be called by the device driver when an IP
* packet has been received. The function will check if the address is
* in the ARP cache, and if so the ARP cache entry will be
* refreshed. If no ARP cache entry was found, a new one is created.
*
* This function expects an IP packet with a prepended Ethernet header
* in the uip_buf[] buffer, and the length of the packet in the global
* variable uip_len.
*/
/*-----------------------------------------------------------------------------------*/
#if 1
void uip_arp_ipin( void )
{
uip_len -= sizeof( struct uip_eth_hdr );
/* Only insert/update an entry if the source IP address of the
incoming IP packet comes from a host on the local network. */
if( (IPBUF->srcipaddr[0] & uip_netmask[0]) != (uip_hostaddr[0] & uip_netmask[0]) )
{
return;
}
if( (IPBUF->srcipaddr[1] & uip_netmask[1]) != (uip_hostaddr[1] & uip_netmask[1]) )
{
return;
}
uip_arp_update( IPBUF->srcipaddr, &(IPBUF->ethhdr.src) );
return;
}
#endif /* 0 */
/*-----------------------------------------------------------------------------------*/
/**
* ARP processing for incoming ARP packets.
*
* This function should be called by the device driver when an ARP
* packet has been received. The function will act differently
* depending on the ARP packet type: if it is a reply for a request
* that we previously sent out, the ARP cache will be filled in with
* the values from the ARP reply. If the incoming ARP packet is an ARP
* request for our IP address, an ARP reply packet is created and put
* into the uip_buf[] buffer.
*
* When the function returns, the value of the global variable uip_len
* indicates whether the device driver should send out a packet or
* not. If uip_len is zero, no packet should be sent. If uip_len is
* non-zero, it contains the length of the outbound packet that is
* present in the uip_buf[] buffer.
*
* This function expects an ARP packet with a prepended Ethernet
* header in the uip_buf[] buffer, and the length of the packet in the
* global variable uip_len.
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_arpin( void )
{
if( uip_len < sizeof(struct arp_hdr) )
{
uip_len = 0;
return;
}
uip_len = 0;
switch( BUF->opcode )
{
case HTONS( ARP_REQUEST ):
/* ARP request. If it asked for our address, we send out a
reply. */
if( uip_ipaddr_cmp(BUF->dipaddr, uip_hostaddr) )
{
/* First, we register the one who made the request in our ARP
table, since it is likely that we will do more communication
with this host in the future. */
uip_arp_update( BUF->sipaddr, &BUF->shwaddr );
/* The reply opcode is 2. */
BUF->opcode = HTONS( 2 );
memcpy( BUF->dhwaddr.addr, BUF->shwaddr.addr, 6 );
memcpy( BUF->shwaddr.addr, uip_ethaddr.addr, 6 );
memcpy( BUF->ethhdr.src.addr, uip_ethaddr.addr, 6 );
memcpy( BUF->ethhdr.dest.addr, BUF->dhwaddr.addr, 6 );
BUF->dipaddr[0] = BUF->sipaddr[0];
BUF->dipaddr[1] = BUF->sipaddr[1];
BUF->sipaddr[0] = uip_hostaddr[0];
BUF->sipaddr[1] = uip_hostaddr[1];
BUF->ethhdr.type = HTONS( UIP_ETHTYPE_ARP );
uip_len = sizeof( struct arp_hdr );
}
break;
case HTONS( ARP_REPLY ):
/* ARP reply. We insert or update the ARP table if it was meant
for us. */
if( uip_ipaddr_cmp(BUF->dipaddr, uip_hostaddr) )
{
uip_arp_update( BUF->sipaddr, &BUF->shwaddr );
}
break;
}
return;
}
/*-----------------------------------------------------------------------------------*/
/**
* Prepend Ethernet header to an outbound IP packet and see if we need
* to send out an ARP request.
*
* This function should be called before sending out an IP packet. The
* function checks the destination IP address of the IP packet to see
* what Ethernet MAC address that should be used as a destination MAC
* address on the Ethernet.
*
* If the destination IP address is in the local network (determined
* by logical ANDing of netmask and our IP address), the function
* checks the ARP cache to see if an entry for the destination IP
* address is found. If so, an Ethernet header is prepended and the
* function returns. If no ARP cache entry is found for the
* destination IP address, the packet in the uip_buf[] is replaced by
* an ARP request packet for the IP address. The IP packet is dropped
* and it is assumed that they higher level protocols (e.g., TCP)
* eventually will retransmit the dropped packet.
*
* If the destination IP address is not on the local network, the IP
* address of the default router is used instead.
*
* When the function returns, a packet is present in the uip_buf[]
* buffer, and the length of the packet is in the global variable
* uip_len.
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_out( void )
{
struct arp_entry *tabptr;
/* Find the destination IP address in the ARP table and construct
the Ethernet header. If the destination IP addres isn't on the
local network, we use the default router's IP address instead.
If not ARP table entry is found, we overwrite the original IP
packet with an ARP request for the IP address. */
/* First check if destination is a local broadcast. */
if( uip_ipaddr_cmp(IPBUF->destipaddr, broadcast_ipaddr) )
{
memcpy( IPBUF->ethhdr.dest.addr, broadcast_ethaddr.addr, 6 );
}
else
{
/* Check if the destination address is on the local network. */
if( !uip_ipaddr_maskcmp(IPBUF->destipaddr, uip_hostaddr, uip_netmask) )
{
/* Destination address was not on the local network, so we need to
use the default router's IP address instead of the destination
address when determining the MAC address. */
uip_ipaddr_copy( ipaddr, uip_draddr );
}
else
{
/* Else, we use the destination IP address. */
uip_ipaddr_copy( ipaddr, IPBUF->destipaddr );
}
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( uip_ipaddr_cmp(ipaddr, tabptr->ipaddr) )
{
break;
}
}
if( i == UIP_ARPTAB_SIZE )
{
/* The destination address was not in our ARP table, so we
overwrite the IP packet with an ARP request. */
memset( BUF->ethhdr.dest.addr, 0xff, 6 );
memset( BUF->dhwaddr.addr, 0x00, 6 );
memcpy( BUF->ethhdr.src.addr, uip_ethaddr.addr, 6 );
memcpy( BUF->shwaddr.addr, uip_ethaddr.addr, 6 );
uip_ipaddr_copy( BUF->dipaddr, ipaddr );
uip_ipaddr_copy( BUF->sipaddr, uip_hostaddr );
BUF->opcode = HTONS( ARP_REQUEST ); /* ARP request. */
BUF->hwtype = HTONS( ARP_HWTYPE_ETH );
BUF->protocol = HTONS( UIP_ETHTYPE_IP );
BUF->hwlen = 6;
BUF->protolen = 4;
BUF->ethhdr.type = HTONS( UIP_ETHTYPE_ARP );
uip_appdata = &uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN];
uip_len = sizeof( struct arp_hdr );
return;
}
/* Build an ethernet header. */
memcpy( IPBUF->ethhdr.dest.addr, tabptr->ethaddr.addr, 6 );
}
memcpy( IPBUF->ethhdr.src.addr, uip_ethaddr.addr, 6 );
IPBUF->ethhdr.type = HTONS( UIP_ETHTYPE_IP );
uip_len += sizeof( struct uip_eth_hdr );
}
/*-----------------------------------------------------------------------------------*/
/** @} */
/** @} */

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/**
* \addtogroup uip
* @{
*/
/**
* \addtogroup uiparp
* @{
*/
/**
* \file
* Macros and definitions for the ARP module.
* \author Adam Dunkels <adam@dunkels.com>
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip_arp.h,v 1.5 2006/06/11 21:46:39 adam Exp $
*
*/
#ifndef __UIP_ARP_H__
#define __UIP_ARP_H__
#include "uip.h"
extern struct uip_eth_addr uip_ethaddr;
/**
* The Ethernet header.
*/
#ifdef __ICCARM__
#pragma pack(1)
#endif
struct uip_eth_hdr {
struct uip_eth_addr dest;
struct uip_eth_addr src;
u16_t type;
}PACK_STRUCT_END;
#ifdef __ICCARM__
#pragma pack()
#endif
#define UIP_ETHTYPE_ARP 0x0806
#define UIP_ETHTYPE_IP 0x0800
#define UIP_ETHTYPE_IP6 0x86dd
/* The uip_arp_init() function must be called before any of the other
ARP functions. */
void uip_arp_init(void);
/* The uip_arp_ipin() function should be called whenever an IP packet
arrives from the Ethernet. This function refreshes the ARP table or
inserts a new mapping if none exists. The function assumes that an
IP packet with an Ethernet header is present in the uip_buf buffer
and that the length of the packet is in the uip_len variable. */
void uip_arp_ipin(void);
//#define uip_arp_ipin()
/* The uip_arp_arpin() should be called when an ARP packet is received
by the Ethernet driver. This function also assumes that the
Ethernet frame is present in the uip_buf buffer. When the
uip_arp_arpin() function returns, the contents of the uip_buf
buffer should be sent out on the Ethernet if the uip_len variable
is > 0. */
void uip_arp_arpin(void);
/* The uip_arp_out() function should be called when an IP packet
should be sent out on the Ethernet. This function creates an
Ethernet header before the IP header in the uip_buf buffer. The
Ethernet header will have the correct Ethernet MAC destination
address filled in if an ARP table entry for the destination IP
address (or the IP address of the default router) is present. If no
such table entry is found, the IP packet is overwritten with an ARP
request and we rely on TCP to retransmit the packet that was
overwritten. In any case, the uip_len variable holds the length of
the Ethernet frame that should be transmitted. */
void uip_arp_out(void);
/* The uip_arp_timer() function should be called every ten seconds. It
is responsible for flushing old entries in the ARP table. */
void uip_arp_timer(void);
/** @} */
/**
* \addtogroup uipconffunc
* @{
*/
/**
* Specifiy the Ethernet MAC address.
*
* The ARP code needs to know the MAC address of the Ethernet card in
* order to be able to respond to ARP queries and to generate working
* Ethernet headers.
*
* \note This macro only specifies the Ethernet MAC address to the ARP
* code. It cannot be used to change the MAC address of the Ethernet
* card.
*
* \param eaddr A pointer to a struct uip_eth_addr containing the
* Ethernet MAC address of the Ethernet card.
*
* \hideinitializer
*/
#define uip_setethaddr(eaddr) do {uip_ethaddr.addr[0] = eaddr.addr[0]; \
uip_ethaddr.addr[1] = eaddr.addr[1];\
uip_ethaddr.addr[2] = eaddr.addr[2];\
uip_ethaddr.addr[3] = eaddr.addr[3];\
uip_ethaddr.addr[4] = eaddr.addr[4];\
uip_ethaddr.addr[5] = eaddr.addr[5];} while(0)
/** @} */
/** @} */
#endif /* __UIP_ARP_H__ */

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/**
* \defgroup timer Timer library
*
* The timer library provides functions for setting, resetting and
* restarting timers, and for checking if a timer has expired. An
* application must "manually" check if its timers have expired; this
* is not done automatically.
*
* A timer is declared as a \c struct \c timer and all access to the
* timer is made by a pointer to the declared timer.
*
* \note The timer library uses the \ref clock "Clock library" to
* measure time. Intervals should be specified in the format used by
* the clock library.
*
* @{
*/
/**
* \file
* Timer library header file.
* \author
* Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: timer.h,v 1.3 2006/06/11 21:46:39 adam Exp $
*/
#ifndef __TIMER_H__
#define __TIMER_H__
#include "clock.h"
/**
* A timer.
*
* This structure is used for declaring a timer. The timer must be set
* with timer_set() before it can be used.
*
* \hideinitializer
*/
struct timer {
clock_time_t start;
clock_time_t interval;
};
void timer_set(struct timer *t, clock_time_t interval);
void timer_reset(struct timer *t);
void timer_restart(struct timer *t);
int timer_expired(struct timer *t);
#endif /* __TIMER_H__ */
/** @} */

81
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/*
* Copyright (c) 2004, Adam Dunkels and the Swedish Institute of
* Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* $Id: uiplib.c,v 1.2 2006/06/12 08:00:31 adam Exp $
*
*/
#include "uip.h"
#include "uiplib.h"
/*-----------------------------------------------------------------------------------*/
unsigned char uiplib_ipaddrconv( char *addrstr, unsigned char *ipaddr )
{
unsigned char tmp;
char c;
unsigned char i, j;
tmp = 0;
for( i = 0; i < 4; ++i )
{
j = 0;
do
{
c = *addrstr;
++j;
if( j > 4 )
{
return 0;
}
if( c == '.' || c == 0 )
{
*ipaddr = tmp;
++ipaddr;
tmp = 0;
}
else if( c >= '0' && c <= '9' )
{
tmp = ( tmp * 10 ) + ( c - '0' );
}
else
{
return 0;
}
++addrstr;
} while( c != '.' && c != 0 );
}
return 1;
}
/*-----------------------------------------------------------------------------------*/

71
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/**
* \file
* Various uIP library functions.
* \author
* Adam Dunkels <adam@sics.se>
*
*/
/*
* Copyright (c) 2002, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* $Id: uiplib.h,v 1.1 2006/06/07 09:15:19 adam Exp $
*
*/
#ifndef __UIPLIB_H__
#define __UIPLIB_H__
/**
* \addtogroup uipconvfunc
* @{
*/
/**
* Convert a textual representation of an IP address to a numerical representation.
*
* This function takes a textual representation of an IP address in
* the form a.b.c.d and converts it into a 4-byte array that can be
* used by other uIP functions.
*
* \param addrstr A pointer to a string containing the IP address in
* textual form.
*
* \param addr A pointer to a 4-byte array that will be filled in with
* the numerical representation of the address.
*
* \retval 0 If the IP address could not be parsed.
* \retval Non-zero If the IP address was parsed.
*/
unsigned char uiplib_ipaddrconv(char *addrstr, unsigned char *addr);
/** @} */
#endif /* __UIPLIB_H__ */

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/**
* \defgroup uipopt Configuration options for uIP
* @{
*
* uIP is configured using the per-project configuration file
* uipopt.h. This file contains all compile-time options for uIP and
* should be tweaked to match each specific project. The uIP
* distribution contains a documented example "uipopt.h" that can be
* copied and modified for each project.
*
* \note Most of the configuration options in the uipopt.h should not
* be changed, but rather the per-project uip-conf.h file.
*/
/**
* \file
* Configuration options for uIP.
* \author Adam Dunkels <adam@dunkels.com>
*
* This file is used for tweaking various configuration options for
* uIP. You should make a copy of this file into one of your project's
* directories instead of editing this example "uipopt.h" file that
* comes with the uIP distribution.
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uipopt.h,v 1.4 2006/06/12 08:00:31 adam Exp $
*
*/
#ifndef __UIPOPT_H__
#define __UIPOPT_H__
#ifndef UIP_LITTLE_ENDIAN
#define UIP_LITTLE_ENDIAN 3412
#endif /* UIP_LITTLE_ENDIAN */
#ifndef UIP_BIG_ENDIAN
#define UIP_BIG_ENDIAN 1234
#endif /* UIP_BIG_ENDIAN */
#include "uip-conf.h"
/*------------------------------------------------------------------------------*/
/**
* \name Static configuration options
* @{
*
* These configuration options can be used for setting the IP address
* settings statically, but only if UIP_FIXEDADDR is set to 1. The
* configuration options for a specific node includes IP address,
* netmask and default router as well as the Ethernet address. The
* netmask, default router and Ethernet address are appliciable only
* if uIP should be run over Ethernet.
*
* All of these should be changed to suit your project.
*/
/**
* Determines if uIP should use a fixed IP address or not.
*
* If uIP should use a fixed IP address, the settings are set in the
* uipopt.h file. If not, the macros uip_sethostaddr(),
* uip_setdraddr() and uip_setnetmask() should be used instead.
*
* \hideinitializer
*/
#define UIP_FIXEDADDR 0
/**
* Ping IP address asignment.
*
* uIP uses a "ping" packets for setting its own IP address if this
* option is set. If so, uIP will start with an empty IP address and
* the destination IP address of the first incoming "ping" (ICMP echo)
* packet will be used for setting the hosts IP address.
*
* \note This works only if UIP_FIXEDADDR is 0.
*
* \hideinitializer
*/
#ifdef UIP_CONF_PINGADDRCONF
#define UIP_PINGADDRCONF UIP_CONF_PINGADDRCONF
#else /* UIP_CONF_PINGADDRCONF */
#define UIP_PINGADDRCONF 0
#endif /* UIP_CONF_PINGADDRCONF */
/**
* Specifies if the uIP ARP module should be compiled with a fixed
* Ethernet MAC address or not.
*
* If this configuration option is 0, the macro uip_setethaddr() can
* be used to specify the Ethernet address at run-time.
*
* \hideinitializer
*/
#define UIP_FIXEDETHADDR 0
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name IP configuration options
* @{
*
*/
/**
* The IP TTL (time to live) of IP packets sent by uIP.
*
* This should normally not be changed.
*/
#define UIP_TTL 64
/**
* Turn on support for IP packet reassembly.
*
* uIP supports reassembly of fragmented IP packets. This features
* requires an additonal amount of RAM to hold the reassembly buffer
* and the reassembly code size is approximately 700 bytes. The
* reassembly buffer is of the same size as the uip_buf buffer
* (configured by UIP_BUFSIZE).
*
* \note IP packet reassembly is not heavily tested.
*
* \hideinitializer
*/
#define UIP_REASSEMBLY 0
/**
* The maximum time an IP fragment should wait in the reassembly
* buffer before it is dropped.
*
*/
#define UIP_REASS_MAXAGE 40
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name UDP configuration options
* @{
*/
/**
* Toggles wether UDP support should be compiled in or not.
*
* \hideinitializer
*/
#ifdef UIP_CONF_UDP
#define UIP_UDP UIP_CONF_UDP
#else /* UIP_CONF_UDP */
#define UIP_UDP 0
#endif /* UIP_CONF_UDP */
/**
* Toggles if UDP checksums should be used or not.
*
* \note Support for UDP checksums is currently not included in uIP,
* so this option has no function.
*
* \hideinitializer
*/
#ifdef UIP_CONF_UDP_CHECKSUMS
#define UIP_UDP_CHECKSUMS UIP_CONF_UDP_CHECKSUMS
#else
#define UIP_UDP_CHECKSUMS 0
#endif
/**
* The maximum amount of concurrent UDP connections.
*
* \hideinitializer
*/
#ifdef UIP_CONF_UDP_CONNS
#define UIP_UDP_CONNS UIP_CONF_UDP_CONNS
#else /* UIP_CONF_UDP_CONNS */
#define UIP_UDP_CONNS 10
#endif /* UIP_CONF_UDP_CONNS */
/**
* The name of the function that should be called when UDP datagrams arrive.
*
* \hideinitializer
*/
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name TCP configuration options
* @{
*/
/**
* Determines if support for opening connections from uIP should be
* compiled in.
*
* If the applications that are running on top of uIP for this project
* do not need to open outgoing TCP connections, this configration
* option can be turned off to reduce the code size of uIP.
*
* \hideinitializer
*/
#define UIP_ACTIVE_OPEN 1
/**
* The maximum number of simultaneously open TCP connections.
*
* Since the TCP connections are statically allocated, turning this
* configuration knob down results in less RAM used. Each TCP
* connection requires approximatly 30 bytes of memory.
*
* \hideinitializer
*/
#ifndef UIP_CONF_MAX_CONNECTIONS
#define UIP_CONNS 10
#else /* UIP_CONF_MAX_CONNECTIONS */
#define UIP_CONNS UIP_CONF_MAX_CONNECTIONS
#endif /* UIP_CONF_MAX_CONNECTIONS */
/**
* The maximum number of simultaneously listening TCP ports.
*
* Each listening TCP port requires 2 bytes of memory.
*
* \hideinitializer
*/
#ifndef UIP_CONF_MAX_LISTENPORTS
#define UIP_LISTENPORTS 20
#else /* UIP_CONF_MAX_LISTENPORTS */
#define UIP_LISTENPORTS UIP_CONF_MAX_LISTENPORTS
#endif /* UIP_CONF_MAX_LISTENPORTS */
/**
* Determines if support for TCP urgent data notification should be
* compiled in.
*
* Urgent data (out-of-band data) is a rarely used TCP feature that
* very seldom would be required.
*
* \hideinitializer
*/
#define UIP_URGDATA 0
/**
* The initial retransmission timeout counted in timer pulses.
*
* This should not be changed.
*/
#define UIP_RTO 3
/**
* The maximum number of times a segment should be retransmitted
* before the connection should be aborted.
*
* This should not be changed.
*/
#define UIP_MAXRTX 8
/**
* The maximum number of times a SYN segment should be retransmitted
* before a connection request should be deemed to have been
* unsuccessful.
*
* This should not need to be changed.
*/
#define UIP_MAXSYNRTX 5
/**
* The TCP maximum segment size.
*
* This is should not be to set to more than
* UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN.
*/
#define UIP_TCP_MSS (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN)
/**
* The size of the advertised receiver's window.
*
* Should be set low (i.e., to the size of the uip_buf buffer) is the
* application is slow to process incoming data, or high (32768 bytes)
* if the application processes data quickly.
*
* \hideinitializer
*/
#ifndef UIP_CONF_RECEIVE_WINDOW
#define UIP_RECEIVE_WINDOW UIP_TCP_MSS
#else
#define UIP_RECEIVE_WINDOW UIP_CONF_RECEIVE_WINDOW
#endif
/**
* How long a connection should stay in the TIME_WAIT state.
*
* This configiration option has no real implication, and it should be
* left untouched.
*/
#define UIP_TIME_WAIT_TIMEOUT 120
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name ARP configuration options
* @{
*/
/**
* The size of the ARP table.
*
* This option should be set to a larger value if this uIP node will
* have many connections from the local network.
*
* \hideinitializer
*/
#ifdef UIP_CONF_ARPTAB_SIZE
#define UIP_ARPTAB_SIZE UIP_CONF_ARPTAB_SIZE
#else
#define UIP_ARPTAB_SIZE 8
#endif
/**
* The maxium age of ARP table entries measured in 10ths of seconds.
*
* An UIP_ARP_MAXAGE of 120 corresponds to 20 minutes (BSD
* default).
*/
#define UIP_ARP_MAXAGE 120
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name General configuration options
* @{
*/
/**
* The size of the uIP packet buffer.
*
* The uIP packet buffer should not be smaller than 60 bytes, and does
* not need to be larger than 1500 bytes. Lower size results in lower
* TCP throughput, larger size results in higher TCP throughput.
*
* \hideinitializer
*/
#ifndef UIP_CONF_BUFFER_SIZE
#define UIP_BUFSIZE 1500
#else /* UIP_CONF_BUFFER_SIZE */
#define UIP_BUFSIZE UIP_CONF_BUFFER_SIZE
#endif /* UIP_CONF_BUFFER_SIZE */
/**
* Determines if statistics support should be compiled in.
*
* The statistics is useful for debugging and to show the user.
*
* \hideinitializer
*/
#ifndef UIP_CONF_STATISTICS
#define UIP_STATISTICS 0
#else /* UIP_CONF_STATISTICS */
#define UIP_STATISTICS UIP_CONF_STATISTICS
#endif /* UIP_CONF_STATISTICS */
/**
* Determines if logging of certain events should be compiled in.
*
* This is useful mostly for debugging. The function uip_log()
* must be implemented to suit the architecture of the project, if
* logging is turned on.
*
* \hideinitializer
*/
#ifndef UIP_CONF_LOGGING
#define UIP_LOGGING 0
#else /* UIP_CONF_LOGGING */
#define UIP_LOGGING UIP_CONF_LOGGING
#endif /* UIP_CONF_LOGGING */
/**
* Broadcast support.
*
* This flag configures IP broadcast support. This is useful only
* together with UDP.
*
* \hideinitializer
*
*/
#ifndef UIP_CONF_BROADCAST
#define UIP_BROADCAST 0
#else /* UIP_CONF_BROADCAST */
#define UIP_BROADCAST UIP_CONF_BROADCAST
#endif /* UIP_CONF_BROADCAST */
/**
* Print out a uIP log message.
*
* This function must be implemented by the module that uses uIP, and
* is called by uIP whenever a log message is generated.
*/
void uip_log(char *msg);
/**
* The link level header length.
*
* This is the offset into the uip_buf where the IP header can be
* found. For Ethernet, this should be set to 14. For SLIP, this
* should be set to 0.
*
* \hideinitializer
*/
#ifdef UIP_CONF_LLH_LEN
#define UIP_LLH_LEN UIP_CONF_LLH_LEN
#else /* UIP_CONF_LLH_LEN */
#define UIP_LLH_LEN 14
#endif /* UIP_CONF_LLH_LEN */
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name CPU architecture configuration
* @{
*
* The CPU architecture configuration is where the endianess of the
* CPU on which uIP is to be run is specified. Most CPUs today are
* little endian, and the most notable exception are the Motorolas
* which are big endian. The BYTE_ORDER macro should be changed to
* reflect the CPU architecture on which uIP is to be run.
*/
/**
* The byte order of the CPU architecture on which uIP is to be run.
*
* This option can be either BIG_ENDIAN (Motorola byte order) or
* LITTLE_ENDIAN (Intel byte order).
*
* \hideinitializer
*/
#define UIP_BYTE_ORDER UIP_CONF_BYTE_ORDER
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \name Appication specific configurations
* @{
*
* An uIP application is implemented using a single application
* function that is called by uIP whenever a TCP/IP event occurs. The
* name of this function must be registered with uIP at compile time
* using the UIP_APPCALL definition.
*
* uIP applications can store the application state within the
* uip_conn structure by specifying the type of the application
* structure by typedef:ing the type uip_tcp_appstate_t and uip_udp_appstate_t.
*
* The file containing the definitions must be included in the
* uipopt.h file.
*
* The following example illustrates how this can look.
\code
void httpd_appcall(void);
#define UIP_APPCALL httpd_appcall
struct httpd_state {
u8_t state;
u16_t count;
char *dataptr;
char *script;
};
typedef struct httpd_state uip_tcp_appstate_t
\endcode
*/
/**
* \var #define UIP_APPCALL
*
* The name of the application function that uIP should call in
* response to TCP/IP events.
*
*/
/**
* \var typedef uip_tcp_appstate_t
*
* The type of the application state that is to be stored in the
* uip_conn structure. This usually is typedef:ed to a struct holding
* application state information.
*/
/**
* \var typedef uip_udp_appstate_t
*
* The type of the application state that is to be stored in the
* uip_conn structure. This usually is typedef:ed to a struct holding
* application state information.
*/
/** @} */
/** @} */
#endif /* __UIPOPT_H__ */

486
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeTCPIP/apps/httpd/http-strings.c Normal file
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@ -0,0 +1,486 @@
const char http_http[8] = /* "http://" */ { 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, };
const char http_200[5] = /* "200 " */ { 0x32, 0x30, 0x30, 0x20, };
const char http_301[5] = /* "301 " */ { 0x33, 0x30, 0x31, 0x20, };
const char http_302[5] = /* "302 " */ { 0x33, 0x30, 0x32, 0x20, };
const char http_get[5] = /* "GET " */ { 0x47, 0x45, 0x54, 0x20, };
const char http_10[9] = /* "HTTP/1.0" */ { 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, };
const char http_11[9] = /* "HTTP/1.1" */ { 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x31, };
const char http_content_type[15] =
/* "content-type: " */
{ 0x63,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
};
const char http_texthtml[10] = /* "text/html" */ { 0x74, 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, };
const char http_location[11] = /* "location: " */ { 0x6c, 0x6f, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x20, };
const char http_host[7] = /* "host: " */ { 0x68, 0x6f, 0x73, 0x74, 0x3a, 0x20, };
const char http_crnl[3] = /* "\r\n" */ { 0xd, 0xa, };
const char http_index_html[12] = /* "/index.html" */ { 0x2f, 0x69, 0x6e, 0x64, 0x65, 0x78, 0x2e, 0x68, 0x74, 0x6d, 0x6c, };
const char http_404_html[10] = /* "/404.html" */ { 0x2f, 0x34, 0x30, 0x34, 0x2e, 0x68, 0x74, 0x6d, 0x6c, };
const char http_referer[9] = /* "Referer:" */ { 0x52, 0x65, 0x66, 0x65, 0x72, 0x65, 0x72, 0x3a, };
const char http_header_200[84] =
/* "HTTP/1.0 200 OK\r\nServer: uIP/1.0 http://www.sics.se/~adam/uip/\r\nConnection: close\r\n" */
{ 0x48,
0x54,
0x54,
0x50,
0x2f,
0x31,
0x2e,
0x30,
0x20,
0x32,
0x30,
0x30,
0x20,
0x4f,
0x4b,
0xd,
0xa,
0x53,
0x65,
0x72,
0x76,
0x65,
0x72,
0x3a,
0x20,
0x75,
0x49,
0x50,
0x2f,
0x31,
0x2e,
0x30,
0x20,
0x68,
0x74,
0x74,
0x70,
0x3a,
0x2f,
0x2f,
0x77,
0x77,
0x77,
0x2e,
0x73,
0x69,
0x63,
0x73,
0x2e,
0x73,
0x65,
0x2f,
0x7e,
0x61,
0x64,
0x61,
0x6d,
0x2f,
0x75,
0x69,
0x70,
0x2f,
0xd,
0xa,
0x43,
0x6f,
0x6e,
0x6e,
0x65,
0x63,
0x74,
0x69,
0x6f,
0x6e,
0x3a,
0x20,
0x63,
0x6c,
0x6f,
0x73,
0x65,
0xd,
0xa,
};
const char http_header_404[91] =
/* "HTTP/1.0 404 Not found\r\nServer: uIP/1.0 http://www.sics.se/~adam/uip/\r\nConnection: close\r\n" */
{ 0x48,
0x54,
0x54,
0x50,
0x2f,
0x31,
0x2e,
0x30,
0x20,
0x34,
0x30,
0x34,
0x20,
0x4e,
0x6f,
0x74,
0x20,
0x66,
0x6f,
0x75,
0x6e,
0x64,
0xd,
0xa,
0x53,
0x65,
0x72,
0x76,
0x65,
0x72,
0x3a,
0x20,
0x75,
0x49,
0x50,
0x2f,
0x31,
0x2e,
0x30,
0x20,
0x68,
0x74,
0x74,
0x70,
0x3a,
0x2f,
0x2f,
0x77,
0x77,
0x77,
0x2e,
0x73,
0x69,
0x63,
0x73,
0x2e,
0x73,
0x65,
0x2f,
0x7e,
0x61,
0x64,
0x61,
0x6d,
0x2f,
0x75,
0x69,
0x70,
0x2f,
0xd,
0xa,
0x43,
0x6f,
0x6e,
0x6e,
0x65,
0x63,
0x74,
0x69,
0x6f,
0x6e,
0x3a,
0x20,
0x63,
0x6c,
0x6f,
0x73,
0x65,
0xd,
0xa,
};
const char http_content_type_plain[29] =
/* "Content-type: text/plain\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x74,
0x65,
0x78,
0x74,
0x2f,
0x70,
0x6c,
0x61,
0x69,
0x6e,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_html[28] =
/* "Content-type: text/html\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x74,
0x65,
0x78,
0x74,
0x2f,
0x68,
0x74,
0x6d,
0x6c,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_css[27] =
/* "Content-type: text/css\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x74,
0x65,
0x78,
0x74,
0x2f,
0x63,
0x73,
0x73,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_text[28] =
/* "Content-type: text/text\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x74,
0x65,
0x78,
0x74,
0x2f,
0x74,
0x65,
0x78,
0x74,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_png[28] =
/* "Content-type: image/png\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x69,
0x6d,
0x61,
0x67,
0x65,
0x2f,
0x70,
0x6e,
0x67,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_gif[28] =
/* "Content-type: image/gif\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x69,
0x6d,
0x61,
0x67,
0x65,
0x2f,
0x67,
0x69,
0x66,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_jpg[29] =
/* "Content-type: image/jpeg\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x69,
0x6d,
0x61,
0x67,
0x65,
0x2f,
0x6a,
0x70,
0x65,
0x67,
0xd,
0xa,
0xd,
0xa,
};
const char http_content_type_binary[43] =
/* "Content-type: application/octet-stream\r\n\r\n" */
{ 0x43,
0x6f,
0x6e,
0x74,
0x65,
0x6e,
0x74,
0x2d,
0x74,
0x79,
0x70,
0x65,
0x3a,
0x20,
0x61,
0x70,
0x70,
0x6c,
0x69,
0x63,
0x61,
0x74,
0x69,
0x6f,
0x6e,
0x2f,
0x6f,
0x63,
0x74,
0x65,
0x74,
0x2d,
0x73,
0x74,
0x72,
0x65,
0x61,
0x6d,
0xd,
0xa,
0xd,
0xa,
};
const char http_html[6] = /* ".html" */ { 0x2e, 0x68, 0x74, 0x6d, 0x6c, };
const char http_shtml[7] = /* ".shtml" */ { 0x2e, 0x73, 0x68, 0x74, 0x6d, 0x6c, };
const char http_htm[5] = /* ".htm" */ { 0x2e, 0x68, 0x74, 0x6d, };
const char http_css[5] = /* ".css" */ { 0x2e, 0x63, 0x73, 0x73, };
const char http_png[5] = /* ".png" */ { 0x2e, 0x70, 0x6e, 0x67, };
const char http_gif[5] = /* ".gif" */ { 0x2e, 0x67, 0x69, 0x66, };
const char http_jpg[5] = /* ".jpg" */ { 0x2e, 0x6a, 0x70, 0x67, };
const char http_text[5] = /* ".txt" */ { 0x2e, 0x74, 0x78, 0x74, };
const char http_txt[5] = /* ".txt" */ { 0x2e, 0x74, 0x78, 0x74, };

34
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extern const char http_http[8];
extern const char http_200[5];
extern const char http_301[5];
extern const char http_302[5];
extern const char http_get[5];
extern const char http_10[9];
extern const char http_11[9];
extern const char http_content_type[15];
extern const char http_texthtml[10];
extern const char http_location[11];
extern const char http_host[7];
extern const char http_crnl[3];
extern const char http_index_html[12];
extern const char http_404_html[10];
extern const char http_referer[9];
extern const char http_header_200[84];
extern const char http_header_404[91];
extern const char http_content_type_plain[29];
extern const char http_content_type_html[28];
extern const char http_content_type_css[27];
extern const char http_content_type_text[28];
extern const char http_content_type_png[28];
extern const char http_content_type_gif[28];
extern const char http_content_type_jpg[29];
extern const char http_content_type_binary[43];
extern const char http_html[6];
extern const char http_shtml[7];
extern const char http_htm[5];
extern const char http_css[5];
extern const char http_png[5];
extern const char http_gif[5];
extern const char http_jpg[5];
extern const char http_text[5];
extern const char http_txt[5];

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/**
* \addtogroup httpd
* @{
*/
/**
* \file
* Web server script interface
* \author
* Adam Dunkels <adam@sics.se>
*
*/
/*
* Copyright (c) 2001-2006, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: httpd-cgi.c,v 1.2 2006/06/11 21:46:37 adam Exp $
*
*/
#include "net/uip.h"
#include "net/psock.h"
#include "httpd.h"
#include "httpd-cgi.h"
#include "httpd-fs.h"
#include <stdio.h>
#include <string.h>
HTTPD_CGI_CALL( file, "file-stats", file_stats );
HTTPD_CGI_CALL( tcp, "tcp-connections", tcp_stats );
HTTPD_CGI_CALL( net, "net-stats", net_stats );
static const struct httpd_cgi_call *calls[] = { &file, &tcp, &net, NULL };
/*---------------------------------------------------------------------------*/
static PT_THREAD( nullfunction ( struct httpd_state *s, char *ptr ) )
{
PSOCK_BEGIN( &s->sout );
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
httpd_cgifunction httpd_cgi( char *name )
{
const struct httpd_cgi_call **f;
/* Find the matching name in the table, return the function. */
for( f = calls; *f != NULL; ++f )
{
if( strncmp((*f)->name, name, strlen((*f)->name)) == 0 )
{
return( *f )->function;
}
}
return nullfunction;
}
/*---------------------------------------------------------------------------*/
static unsigned short generate_file_stats( void *arg )
{
char *f = ( char * ) arg;
return snprintf( ( char * ) uip_appdata, UIP_APPDATA_SIZE, "%5u", httpd_fs_count(f) );
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( file_stats ( struct httpd_state *s, char *ptr ) )
{
PSOCK_BEGIN( &s->sout );
PSOCK_GENERATOR_SEND( &s->sout, generate_file_stats, strchr(ptr, ' ') + 1 );
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
static const char closed[] = /* "CLOSED",*/ { 0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0 };
static const char syn_rcvd[] = /* "SYN-RCVD",*/ { 0x53, 0x59, 0x4e, 0x2d, 0x52, 0x43, 0x56, 0x44, 0 };
static const char syn_sent[] = /* "SYN-SENT",*/ { 0x53, 0x59, 0x4e, 0x2d, 0x53, 0x45, 0x4e, 0x54, 0 };
static const char established[] = /* "ESTABLISHED",*/ { 0x45, 0x53, 0x54, 0x41, 0x42, 0x4c, 0x49, 0x53, 0x48, 0x45, 0x44, 0 };
static const char fin_wait_1[] = /* "FIN-WAIT-1",*/ { 0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 0x54, 0x2d, 0x31, 0 };
static const char fin_wait_2[] = /* "FIN-WAIT-2",*/ { 0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49, 0x54, 0x2d, 0x32, 0 };
static const char closing[] = /* "CLOSING",*/ { 0x43, 0x4c, 0x4f, 0x53, 0x49, 0x4e, 0x47, 0 };
static const char time_wait[] = /* "TIME-WAIT,"*/ { 0x54, 0x49, 0x4d, 0x45, 0x2d, 0x57, 0x41, 0x49, 0x54, 0 };
static const char last_ack[] = /* "LAST-ACK"*/ { 0x4c, 0x41, 0x53, 0x54, 0x2d, 0x41, 0x43, 0x4b, 0 };
static const char *states[] = { closed, syn_rcvd, syn_sent, established, fin_wait_1, fin_wait_2, closing, time_wait, last_ack };
static unsigned short generate_tcp_stats( void *arg )
{
struct uip_conn *conn;
struct httpd_state *s = ( struct httpd_state * ) arg;
conn = &uip_conns[s->count];
return snprintf( ( char * ) uip_appdata, UIP_APPDATA_SIZE,
"<tr><td>%d</td><td>%u.%u.%u.%u:%u</td><td>%s</td><td>%u</td><td>%u</td><td>%c %c</td></tr>\r\n", htons(conn->lport),
htons(conn->ripaddr[0]) >> 8, htons(conn->ripaddr[0]) & 0xff, htons(conn->ripaddr[1]) >> 8,
htons(conn->ripaddr[1]) & 0xff, htons(conn->rport), states[conn->tcpstateflags & UIP_TS_MASK], conn->nrtx, conn->timer,
(uip_outstanding(conn)) ? '*' : ' ', (uip_stopped(conn)) ? '!' : ' ' );
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( tcp_stats ( struct httpd_state *s, char *ptr ) )
{
PSOCK_BEGIN( &s->sout );
for( s->count = 0; s->count < UIP_CONNS; ++s->count )
{
if( (uip_conns[s->count].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED )
{
PSOCK_GENERATOR_SEND( &s->sout, generate_tcp_stats, s );
}
}
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
static unsigned short generate_net_stats( void *arg )
{
struct httpd_state *s = ( struct httpd_state * ) arg;
return snprintf( ( char * ) uip_appdata, UIP_APPDATA_SIZE, "%5u\n", (( uip_stats_t * ) &uip_stat)[s->count] );
}
static PT_THREAD( net_stats ( struct httpd_state *s, char *ptr ) )
{
PSOCK_BEGIN( &s->sout );
#if UIP_STATISTICS
for( s->count = 0; s->count < sizeof(uip_stat) / sizeof(uip_stats_t); ++s->count )
{
PSOCK_GENERATOR_SEND( &s->sout, generate_net_stats, s );
}
#endif /* UIP_STATISTICS */
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
/** @} */

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/**
* \addtogroup httpd
* @{
*/
/**
* \file
* Web server script interface header file
* \author
* Adam Dunkels <adam@sics.se>
*
*/
/*
* Copyright (c) 2001, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: httpd-cgi.h,v 1.2 2006/06/11 21:46:38 adam Exp $
*
*/
#ifndef __HTTPD_CGI_H__
#define __HTTPD_CGI_H__
#include "net/psock.h"
#include "httpd.h"
typedef PT_THREAD( (*httpd_cgifunction) ( struct httpd_state *, char * ) );
httpd_cgifunction httpd_cgi( char *name );
struct httpd_cgi_call
{
const char *name;
const httpd_cgifunction function;
};
/**
* \brief HTTPD CGI function declaration
* \param name The C variable name of the function
* \param str The string name of the function, used in the script file
* \param function A pointer to the function that implements it
*
* This macro is used for declaring a HTTPD CGI
* function. This function is then added to the list of
* HTTPD CGI functions with the httpd_cgi_add() function.
*
* \hideinitializer
*/
#define HTTPD_CGI_CALL( name, str, function ) \
static PT_THREAD( function ( struct httpd_state *, char * ) ); \
static const struct httpd_cgi_call name = \
{ \
str, function \
}
void httpd_cgi_init( void );
#endif /* __HTTPD_CGI_H__ */
/** @} */

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/*
* Copyright (c) 2001, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: httpd-fs.c,v 1.1 2006/06/07 09:13:08 adam Exp $
*/
#include "httpd.h"
#include "httpd-fs.h"
#include "httpd-fsdata.h"
#ifndef NULL
#define NULL 0
#endif /* NULL */
#include "httpd-fsdata.c"
#if HTTPD_FS_STATISTICS
static u16_t count[HTTPD_FS_NUMFILES];
#endif /* HTTPD_FS_STATISTICS */
/*-----------------------------------------------------------------------------------*/
static u8_t httpd_fs_strcmp( const char *str1, const char *str2 )
{
u8_t i;
i = 0;
loop:
if( str2[i] == 0 || str1[i] == '\r' || str1[i] == '\n' )
{
return 0;
}
if( str1[i] != str2[i] )
{
return 1;
}
++i;
goto loop;
}
/*-----------------------------------------------------------------------------------*/
int httpd_fs_open( const char *name, struct httpd_fs_file *file )
{
#if HTTPD_FS_STATISTICS
u16_t i = 0;
#endif /* HTTPD_FS_STATISTICS */
struct httpd_fsdata_file_noconst *f;
for( f = ( struct httpd_fsdata_file_noconst * ) HTTPD_FS_ROOT; f != NULL; f = ( struct httpd_fsdata_file_noconst * ) f->next )
{
if( httpd_fs_strcmp(name, f->name) == 0 )
{
file->data = f->data;
file->len = f->len;
#if HTTPD_FS_STATISTICS
++count[i];
#endif /* HTTPD_FS_STATISTICS */
return 1;
}
#if HTTPD_FS_STATISTICS
++i;
#endif /* HTTPD_FS_STATISTICS */
}
return 0;
}
/*-----------------------------------------------------------------------------------*/
void httpd_fs_init( void )
{
#if HTTPD_FS_STATISTICS
u16_t i;
for( i = 0; i < HTTPD_FS_NUMFILES; i++ )
{
count[i] = 0;
}
#endif /* HTTPD_FS_STATISTICS */
}
/*-----------------------------------------------------------------------------------*/
#if HTTPD_FS_STATISTICS
u16_t httpd_fs_count( char *name )
{
struct httpd_fsdata_file_noconst *f;
u16_t i;
i = 0;
for( f = ( struct httpd_fsdata_file_noconst * ) HTTPD_FS_ROOT; f != NULL; f = ( struct httpd_fsdata_file_noconst * ) f->next )
{
if( httpd_fs_strcmp(name, f->name) == 0 )
{
return count[i];
}
++i;
}
return 0;
}
#endif /* HTTPD_FS_STATISTICS */
/*-----------------------------------------------------------------------------------*/

57
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/*
* Copyright (c) 2001, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: httpd-fs.h,v 1.1 2006/06/07 09:13:08 adam Exp $
*/
#ifndef __HTTPD_FS_H__
#define __HTTPD_FS_H__
#define HTTPD_FS_STATISTICS 1
struct httpd_fs_file
{
char *data;
int len;
};
/* file must be allocated by caller and will be filled in
by the function. */
int httpd_fs_open( const char *name, struct httpd_fs_file *file );
#ifdef HTTPD_FS_STATISTICS
#if HTTPD_FS_STATISTICS == 1
u16_t httpd_fs_count( char *name );
#endif /* HTTPD_FS_STATISTICS */
#endif /* HTTPD_FS_STATISTICS */
void httpd_fs_init( void );
#endif /* __HTTPD_FS_H__ */

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/*
* Copyright (c) 2001, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: httpd-fsdata.h,v 1.1 2006/06/17 22:41:14 adamdunkels Exp $
*/
#ifndef __HTTPD_FSDATA_H__
#define __HTTPD_FSDATA_H__
struct httpd_fsdata_file {
const struct httpd_fsdata_file *next;
const char *name;
const char *data;
const int len;
#ifdef HTTPD_FS_STATISTICS
#if HTTPD_FS_STATISTICS == 1
u16_t count;
#endif /* HTTPD_FS_STATISTICS */
#endif /* HTTPD_FS_STATISTICS */
};
struct httpd_fsdata_file_noconst {
struct httpd_fsdata_file *next;
char *name;
char *data;
int len;
#ifdef HTTPD_FS_STATISTICS
#if HTTPD_FS_STATISTICS == 1
u16_t count;
#endif /* HTTPD_FS_STATISTICS */
#endif /* HTTPD_FS_STATISTICS */
};
#endif /* __HTTPD_FSDATA_H__ */

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/**
* \addtogroup apps
* @{
*/
/**
* \defgroup httpd Web server
* @{
* The uIP web server is a very simplistic implementation of an HTTP
* server. It can serve web pages and files from a read-only ROM
* filesystem, and provides a very small scripting language.
*/
/**
* \file
* Web server
* \author
* Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: httpd.c,v 1.2 2006/06/11 21:46:38 adam Exp $
*/
#include "net/uip.h"
#include "apps/httpd/httpd.h"
#include "apps/httpd/httpd-fs.h"
#include "apps/httpd/httpd-cgi.h"
#include "apps/httpd/http-strings.h"
#include <string.h>
#define STATE_WAITING 0
#define STATE_OUTPUT 1
#define ISO_nl 0x0a
#define ISO_space 0x20
#define ISO_bang 0x21
#define ISO_percent 0x25
#define ISO_period 0x2e
#define ISO_slash 0x2f
#define ISO_colon 0x3a
/*---------------------------------------------------------------------------*/
static unsigned short generate_part_of_file( void *state )
{
struct httpd_state *s = ( struct httpd_state * ) state;
if( s->file.len > uip_mss() )
{
s->len = uip_mss();
}
else
{
s->len = s->file.len;
}
memcpy( uip_appdata, s->file.data, s->len );
return s->len;
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( send_file ( struct httpd_state *s ) )
{
PSOCK_BEGIN( &s->sout );
( void ) PT_YIELD_FLAG;
do
{
PSOCK_GENERATOR_SEND( &s->sout, generate_part_of_file, s );
s->file.len -= s->len;
s->file.data += s->len;
} while( s->file.len > 0 );
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( send_part_of_file ( struct httpd_state *s ) )
{
PSOCK_BEGIN( &s->sout );
( void ) PT_YIELD_FLAG;
PSOCK_SEND( &s->sout, s->file.data, s->len );
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
static void next_scriptstate( struct httpd_state *s )
{
char *p;
p = strchr( s->scriptptr, ISO_nl ) + 1;
s->scriptlen -= ( unsigned short ) ( p - s->scriptptr );
s->scriptptr = p;
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( handle_script ( struct httpd_state *s ) )
{
char *ptr;
PT_BEGIN( &s->scriptpt );
( void ) PT_YIELD_FLAG;
while( s->file.len > 0 )
{
/* Check if we should start executing a script. */
if( *s->file.data == ISO_percent && *(s->file.data + 1) == ISO_bang )
{
s->scriptptr = s->file.data + 3;
s->scriptlen = s->file.len - 3;
if( *(s->scriptptr - 1) == ISO_colon )
{
httpd_fs_open( s->scriptptr + 1, &s->file );
PT_WAIT_THREAD( &s->scriptpt, send_file(s) );
}
else
{
PT_WAIT_THREAD( &s->scriptpt, httpd_cgi(s->scriptptr) (s, s->scriptptr) );
}
next_scriptstate( s );
/* The script is over, so we reset the pointers and continue
sending the rest of the file. */
s->file.data = s->scriptptr;
s->file.len = s->scriptlen;
}
else
{
/* See if we find the start of script marker in the block of HTML
to be sent. */
if( s->file.len > uip_mss() )
{
s->len = uip_mss();
}
else
{
s->len = s->file.len;
}
if( *s->file.data == ISO_percent )
{
ptr = strchr( s->file.data + 1, ISO_percent );
}
else
{
ptr = strchr( s->file.data, ISO_percent );
}
if( ptr != NULL && ptr != s->file.data )
{
s->len = ( int ) ( ptr - s->file.data );
if( s->len >= uip_mss() )
{
s->len = uip_mss();
}
}
PT_WAIT_THREAD( &s->scriptpt, send_part_of_file(s) );
s->file.data += s->len;
s->file.len -= s->len;
}
}
PT_END( &s->scriptpt );
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( send_headers ( struct httpd_state *s, const char *statushdr ) )
{
char *ptr;
PSOCK_BEGIN( &s->sout );
( void ) PT_YIELD_FLAG;
PSOCK_SEND_STR( &s->sout, statushdr );
ptr = strrchr( s->filename, ISO_period );
if( ptr == NULL )
{
PSOCK_SEND_STR( &s->sout, http_content_type_binary );
}
else if( strncmp(http_html, ptr, 5) == 0 || strncmp(http_shtml, ptr, 6) == 0 )
{
PSOCK_SEND_STR( &s->sout, http_content_type_html );
}
else if( strncmp(http_css, ptr, 4) == 0 )
{
PSOCK_SEND_STR( &s->sout, http_content_type_css );
}
else if( strncmp(http_png, ptr, 4) == 0 )
{
PSOCK_SEND_STR( &s->sout, http_content_type_png );
}
else if( strncmp(http_gif, ptr, 4) == 0 )
{
PSOCK_SEND_STR( &s->sout, http_content_type_gif );
}
else if( strncmp(http_jpg, ptr, 4) == 0 )
{
PSOCK_SEND_STR( &s->sout, http_content_type_jpg );
}
else
{
PSOCK_SEND_STR( &s->sout, http_content_type_plain );
}
PSOCK_END( &s->sout );
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( handle_output ( struct httpd_state *s ) )
{
char *ptr;
PT_BEGIN( &s->outputpt );
( void ) PT_YIELD_FLAG;
if( !httpd_fs_open(s->filename, &s->file) )
{
httpd_fs_open( http_404_html, &s->file );
strcpy( s->filename, http_404_html );
PT_WAIT_THREAD( &s->outputpt, send_headers(s, http_header_404) );
PT_WAIT_THREAD( &s->outputpt, send_file(s) );
}
else
{
PT_WAIT_THREAD( &s->outputpt, send_headers(s, http_header_200) );
ptr = strchr( s->filename, ISO_period );
if( ptr != NULL && strncmp(ptr, http_shtml, 6) == 0 )
{
PT_INIT( &s->scriptpt );
PT_WAIT_THREAD( &s->outputpt, handle_script(s) );
}
else
{
PT_WAIT_THREAD( &s->outputpt, send_file(s) );
}
}
PSOCK_CLOSE( &s->sout );
PT_END( &s->outputpt );
}
/*---------------------------------------------------------------------------*/
static PT_THREAD( handle_input ( struct httpd_state *s ) )
{
PSOCK_BEGIN( &s->sin );
( void ) PT_YIELD_FLAG;
PSOCK_READTO( &s->sin, ISO_space );
if( strncmp(s->inputbuf, http_get, 4) != 0 )
{
PSOCK_CLOSE_EXIT( &s->sin );
}
PSOCK_READTO( &s->sin, ISO_space );
if( s->inputbuf[0] != ISO_slash )
{
PSOCK_CLOSE_EXIT( &s->sin );
}
if( s->inputbuf[1] == ISO_space )
{
strncpy( s->filename, http_index_html, sizeof(s->filename) );
}
else
{
s->inputbuf[PSOCK_DATALEN( &s->sin ) - 1] = 0;
/* Process any form input being sent to the server. */
#if UIP_CONF_PROCESS_HTTPD_FORMS == 1
{
extern void vApplicationProcessFormInput( char *pcInputString );
vApplicationProcessFormInput( s->inputbuf );
}
#endif
strncpy( s->filename, &s->inputbuf[0], sizeof(s->filename) );
}
/* httpd_log_file(uip_conn->ripaddr, s->filename);*/
s->state = STATE_OUTPUT;
while( 1 )
{
PSOCK_READTO( &s->sin, ISO_nl );
if( strncmp(s->inputbuf, http_referer, 8) == 0 )
{
s->inputbuf[PSOCK_DATALEN( &s->sin ) - 2] = 0;
/* httpd_log(&s->inputbuf[9]);*/
}
}
PSOCK_END( &s->sin );
}
/*---------------------------------------------------------------------------*/
static void handle_connection( struct httpd_state *s )
{
handle_input( s );
if( s->state == STATE_OUTPUT )
{
handle_output( s );
}
}
/*---------------------------------------------------------------------------*/
void httpd_appcall( void )
{
struct httpd_state *s = ( struct httpd_state * ) &( uip_conn->appstate );
if( uip_closed() || uip_aborted() || uip_timedout() )
{
}
else if( uip_connected() )
{
PSOCK_INIT( &s->sin, s->inputbuf, sizeof(s->inputbuf) - 1 );
PSOCK_INIT( &s->sout, s->inputbuf, sizeof(s->inputbuf) - 1 );
PT_INIT( &s->outputpt );
s->state = STATE_WAITING;
/* timer_set(&s->timer, CLOCK_SECOND * 100);*/
s->timer = 0;
handle_connection( s );
}
else if( s != NULL )
{
if( uip_poll() )
{
++s->timer;
if( s->timer >= 20 )
{
uip_abort();
}
}
else
{
s->timer = 0;
}
handle_connection( s );
}
else
{
uip_abort();
}
}
/*---------------------------------------------------------------------------*/
/**
* \brief Initialize the web server
*
* This function initializes the web server and should be
* called at system boot-up.
*/
void httpd_init( void )
{
uip_listen( HTONS(80) );
}
/*---------------------------------------------------------------------------*/
/** @} */

61
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/*
* Copyright (c) 2001-2005, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: httpd.h,v 1.2 2006/06/11 21:46:38 adam Exp $
*
*/
#ifndef __HTTPD_H__
#define __HTTPD_H__
#include "net/psock.h"
#include "httpd-fs.h"
struct httpd_state
{
unsigned char timer;
struct psock sin, sout;
struct pt outputpt, scriptpt;
char inputbuf[50];
char filename[20];
char state;
struct httpd_fs_file file;
int len;
char *scriptptr;
int scriptlen;
unsigned short count;
};
void httpd_init( void );
void httpd_appcall( void );
void httpd_log( char *msg );
void httpd_log_file( u16_t *requester, char *file );
#endif /* __HTTPD_H__ */

78
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#!/usr/bin/perl
open(OUTPUT, "> httpd-fsdata.c");
chdir("httpd-fs");
opendir(DIR, ".");
@files = grep { !/^\./ && !/(CVS|~)/ } readdir(DIR);
closedir(DIR);
foreach $file (@files) {
if(-d $file && $file !~ /^\./) {
print "Processing directory $file\n";
opendir(DIR, $file);
@newfiles = grep { !/^\./ && !/(CVS|~)/ } readdir(DIR);
closedir(DIR);
printf "Adding files @newfiles\n";
@files = (@files, map { $_ = "$file/$_" } @newfiles);
next;
}
}
foreach $file (@files) {
if(-f $file) {
print "Adding file $file\n";
open(FILE, $file) || die "Could not open file $file\n";
$file =~ s-^-/-;
$fvar = $file;
$fvar =~ s-/-_-g;
$fvar =~ s-\.-_-g;
# for AVR, add PROGMEM here
print(OUTPUT "static const unsigned char data".$fvar."[] = {\n");
print(OUTPUT "\t/* $file */\n\t");
for($j = 0; $j < length($file); $j++) {
printf(OUTPUT "%#02x, ", unpack("C", substr($file, $j, 1)));
}
printf(OUTPUT "0,\n");
$i = 0;
while(read(FILE, $data, 1)) {
if($i == 0) {
print(OUTPUT "\t");
}
printf(OUTPUT "%#02x, ", unpack("C", $data));
$i++;
if($i == 10) {
print(OUTPUT "\n");
$i = 0;
}
}
print(OUTPUT "0};\n\n");
close(FILE);
push(@fvars, $fvar);
push(@pfiles, $file);
}
}
for($i = 0; $i < @fvars; $i++) {
$file = $pfiles[$i];
$fvar = $fvars[$i];
if($i == 0) {
$prevfile = "NULL";
} else {
$prevfile = "file" . $fvars[$i - 1];
}
print(OUTPUT "const struct httpd_fsdata_file file".$fvar."[] = {{$prevfile, data$fvar, ");
print(OUTPUT "data$fvar + ". (length($file) + 1) .", ");
print(OUTPUT "sizeof(data$fvar) - ". (length($file) + 1) ."}};\n\n");
}
print(OUTPUT "#define HTTPD_FS_ROOT file$fvars[$i - 1]\n\n");
print(OUTPUT "#define HTTPD_FS_NUMFILES $i\n");

42
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeTCPIP/net/clock-arch.h Normal file
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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* $Id: clock-arch.h,v 1.2 2006/06/12 08:00:31 adam Exp $
*/
#ifndef __CLOCK_ARCH_H__
#define __CLOCK_ARCH_H__
#include "FreeRTOS.h"
typedef TickType_t clock_time_t;
#define CLOCK_CONF_SECOND configTICK_RATE_HZ
#endif /* __CLOCK_ARCH_H__ */

76
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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: lc-switch.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup lc
* @{
*/
/**
* \file
* Implementation of local continuations based on switch() statment
* \author Adam Dunkels <adam@sics.se>
*
* This implementation of local continuations uses the C switch()
* statement to resume execution of a function somewhere inside the
* function's body. The implementation is based on the fact that
* switch() statements are able to jump directly into the bodies of
* control structures such as if() or while() statmenets.
*
* This implementation borrows heavily from Simon Tatham's coroutines
* implementation in C:
* http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
*/
#ifndef __LC_SWITCH_H__
#define __LC_SWTICH_H__
/* WARNING! lc implementation using switch() does not work if an
LC_SET() is done within another switch() statement! */
/** \hideinitializer */
typedef unsigned short lc_t;
#define LC_INIT(s) s = 0;
#define LC_RESUME(s) switch(s) { case 0:
#define LC_SET(s) s = __LINE__; case __LINE__:
#define LC_END(s) }
#endif /* __LC_SWITCH_H__ */
/** @} */

131
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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: lc.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup pt
* @{
*/
/**
* \defgroup lc Local continuations
* @{
*
* Local continuations form the basis for implementing protothreads. A
* local continuation can be <i>set</i> in a specific function to
* capture the state of the function. After a local continuation has
* been set can be <i>resumed</i> in order to restore the state of the
* function at the point where the local continuation was set.
*
*
*/
/**
* \file lc.h
* Local continuations
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifdef DOXYGEN
/**
* Initialize a local continuation.
*
* This operation initializes the local continuation, thereby
* unsetting any previously set continuation state.
*
* \hideinitializer
*/
#define LC_INIT(lc)
/**
* Set a local continuation.
*
* The set operation saves the state of the function at the point
* where the operation is executed. As far as the set operation is
* concerned, the state of the function does <b>not</b> include the
* call-stack or local (automatic) variables, but only the program
* counter and such CPU registers that needs to be saved.
*
* \hideinitializer
*/
#define LC_SET(lc)
/**
* Resume a local continuation.
*
* The resume operation resumes a previously set local continuation, thus
* restoring the state in which the function was when the local
* continuation was set. If the local continuation has not been
* previously set, the resume operation does nothing.
*
* \hideinitializer
*/
#define LC_RESUME(lc)
/**
* Mark the end of local continuation usage.
*
* The end operation signifies that local continuations should not be
* used any more in the function. This operation is not needed for
* most implementations of local continuation, but is required by a
* few implementations.
*
* \hideinitializer
*/
#define LC_END(lc)
/**
* \var typedef lc_t;
*
* The local continuation type.
*
* \hideinitializer
*/
#endif /* DOXYGEN */
#ifndef __LC_H__
#define __LC_H__
#ifdef LC_CONF_INCLUDE
#include LC_CONF_INCLUDE
#else
#include "lc-switch.h"
#endif /* LC_CONF_INCLUDE */
#endif /* __LC_H__ */
/** @} */
/** @} */

33
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h Normal file
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#ifdef __GNUC__
__attribute__( (packed) );
#endif
#ifdef _SH
#ifdef __RENESAS__
;
#pragma unpack
#endif
#endif
#ifdef __RX
#ifdef __RENESAS__
;
/* Nothing to do. */
#endif
#endif
#ifdef __ICCRX__
;
#pragma pack()
#endif
#ifdef __ICCARM__
;
#pragma pack()
#endif
#ifdef __CC_ARM
;
#endif

34
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#ifdef __GNUC__
/* Nothing to do here. */
;
#endif
/* Used by SH2A port. */
#ifdef _SH
#ifdef __RENESAS__
#pragma pack 1
#endif
#endif
#ifdef __RX
#ifdef __RENESAS__
/* Nothing to do. */
#endif
#endif
#ifdef __ICCRX__
#pragma pack(1)
#endif
#ifdef __ICCARM__
#pragma pack(1)
#endif
#ifdef __CC_ARM
__packed
#endif

380
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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: psock.h,v 1.3 2006/06/12 08:00:30 adam Exp $
*/
/**
* \defgroup psock Protosockets library
* @{
*
* The protosocket library provides an interface to the uIP stack that is
* similar to the traditional BSD socket interface. Unlike programs
* written for the ordinary uIP event-driven interface, programs
* written with the protosocket library are executed in a sequential
* fashion and does not have to be implemented as explicit state
* machines.
*
* Protosockets only work with TCP connections.
*
* The protosocket library uses \ref pt protothreads to provide
* sequential control flow. This makes the protosockets lightweight in
* terms of memory, but also means that protosockets inherits the
* functional limitations of protothreads. Each protosocket lives only
* within a single function. Automatic variables (stack variables) are
* not retained across a protosocket library function call.
*
* \note Because the protosocket library uses protothreads, local
* variables will not always be saved across a call to a protosocket
* library function. It is therefore advised that local variables are
* used with extreme care.
*
* The protosocket library provides functions for sending data without
* having to deal with retransmissions and acknowledgements, as well
* as functions for reading data without having to deal with data
* being split across more than one TCP segment.
*
* Because each protosocket runs as a protothread, the protosocket has to be
* started with a call to PSOCK_BEGIN() at the start of the function
* in which the protosocket is used. Similarly, the protosocket protothread can
* be terminated by a call to PSOCK_EXIT().
*
*/
/**
* \file
* Protosocket library header file
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifndef __PSOCK_H__
#define __PSOCK_H__
#include "uipopt.h"
#include "pt.h"
/*
* The structure that holds the state of a buffer.
*
* This structure holds the state of a uIP buffer. The structure has
* no user-visible elements, but is used through the functions
* provided by the library.
*
*/
struct psock_buf {
u8_t *ptr;
unsigned short left;
};
/**
* The representation of a protosocket.
*
* The protosocket structrure is an opaque structure with no user-visible
* elements.
*/
struct psock {
struct pt pt, psockpt; /* Protothreads - one that's using the psock
functions, and one that runs inside the
psock functions. */
const u8_t *sendptr; /* Pointer to the next data to be sent. */
u8_t *readptr; /* Pointer to the next data to be read. */
char *bufptr; /* Pointer to the buffer used for buffering
incoming data. */
u16_t sendlen; /* The number of bytes left to be sent. */
u16_t readlen; /* The number of bytes left to be read. */
struct psock_buf buf; /* The structure holding the state of the
input buffer. */
unsigned int bufsize; /* The size of the input buffer. */
unsigned char state; /* The state of the protosocket. */
};
void psock_init(struct psock *psock, char *buffer, unsigned int buffersize);
/**
* Initialize a protosocket.
*
* This macro initializes a protosocket and must be called before the
* protosocket is used. The initialization also specifies the input buffer
* for the protosocket.
*
* \param psock (struct psock *) A pointer to the protosocket to be
* initialized
*
* \param buffer (char *) A pointer to the input buffer for the
* protosocket.
*
* \param buffersize (unsigned int) The size of the input buffer.
*
* \hideinitializer
*/
#define PSOCK_INIT(psock, buffer, buffersize) \
psock_init(psock, buffer, buffersize)
/**
* Start the protosocket protothread in a function.
*
* This macro starts the protothread associated with the protosocket and
* must come before other protosocket calls in the function it is used.
*
* \param psock (struct psock *) A pointer to the protosocket to be
* started.
*
* \hideinitializer
*/
#define PSOCK_BEGIN(psock) PT_BEGIN(&((psock)->pt))
PT_THREAD(psock_send(struct psock *psock, const char *buf, unsigned int len));
/**
* Send data.
*
* This macro sends data over a protosocket. The protosocket protothread blocks
* until all data has been sent and is known to have been received by
* the remote end of the TCP connection.
*
* \param psock (struct psock *) A pointer to the protosocket over which
* data is to be sent.
*
* \param data (char *) A pointer to the data that is to be sent.
*
* \param datalen (unsigned int) The length of the data that is to be
* sent.
*
* \hideinitializer
*/
#define PSOCK_SEND(psock, data, datalen) \
PT_WAIT_THREAD(&((psock)->pt), psock_send(psock, data, datalen))
/**
* \brief Send a null-terminated string.
* \param psock Pointer to the protosocket.
* \param str The string to be sent.
*
* This function sends a null-terminated string over the
* protosocket.
*
* \hideinitializer
*/
#define PSOCK_SEND_STR(psock, str) \
PT_WAIT_THREAD(&((psock)->pt), psock_send(psock, str, strlen(str)))
PT_THREAD(psock_generator_send(struct psock *psock,
unsigned short (*f)(void *), void *arg));
/**
* \brief Generate data with a function and send it
* \param psock Pointer to the protosocket.
* \param generator Pointer to the generator function
* \param arg Argument to the generator function
*
* This function generates data and sends it over the
* protosocket. This can be used to dynamically generate
* data for a transmission, instead of generating the data
* in a buffer beforehand. This function reduces the need for
* buffer memory. The generator function is implemented by
* the application, and a pointer to the function is given
* as an argument with the call to PSOCK_GENERATOR_SEND().
*
* The generator function should place the generated data
* directly in the uip_appdata buffer, and return the
* length of the generated data. The generator function is
* called by the protosocket layer when the data first is
* sent, and once for every retransmission that is needed.
*
* \hideinitializer
*/
#define PSOCK_GENERATOR_SEND(psock, generator, arg) \
PT_WAIT_THREAD(&((psock)->pt), \
psock_generator_send(psock, generator, arg))
/**
* Close a protosocket.
*
* This macro closes a protosocket and can only be called from within the
* protothread in which the protosocket lives.
*
* \param psock (struct psock *) A pointer to the protosocket that is to
* be closed.
*
* \hideinitializer
*/
#define PSOCK_CLOSE(psock) uip_close()
PT_THREAD(psock_readbuf(struct psock *psock));
/**
* Read data until the buffer is full.
*
* This macro will block waiting for data and read the data into the
* input buffer specified with the call to PSOCK_INIT(). Data is read
* until the buffer is full..
*
* \param psock (struct psock *) A pointer to the protosocket from which
* data should be read.
*
* \hideinitializer
*/
#define PSOCK_READBUF(psock) \
PT_WAIT_THREAD(&((psock)->pt), psock_readbuf(psock))
PT_THREAD(psock_readto(struct psock *psock, unsigned char c));
/**
* Read data up to a specified character.
*
* This macro will block waiting for data and read the data into the
* input buffer specified with the call to PSOCK_INIT(). Data is only
* read until the specifieed character appears in the data stream.
*
* \param psock (struct psock *) A pointer to the protosocket from which
* data should be read.
*
* \param c (char) The character at which to stop reading.
*
* \hideinitializer
*/
#define PSOCK_READTO(psock, c) \
PT_WAIT_THREAD(&((psock)->pt), psock_readto(psock, c))
/**
* The length of the data that was previously read.
*
* This macro returns the length of the data that was previously read
* using PSOCK_READTO() or PSOCK_READ().
*
* \param psock (struct psock *) A pointer to the protosocket holding the data.
*
* \hideinitializer
*/
#define PSOCK_DATALEN(psock) psock_datalen(psock)
u16_t psock_datalen(struct psock *psock);
/**
* Exit the protosocket's protothread.
*
* This macro terminates the protothread of the protosocket and should
* almost always be used in conjunction with PSOCK_CLOSE().
*
* \sa PSOCK_CLOSE_EXIT()
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_EXIT(psock) PT_EXIT(&((psock)->pt))
/**
* Close a protosocket and exit the protosocket's protothread.
*
* This macro closes a protosocket and exits the protosocket's protothread.
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_CLOSE_EXIT(psock) \
do { \
PSOCK_CLOSE(psock); \
PSOCK_EXIT(psock); \
} while(0)
/**
* Declare the end of a protosocket's protothread.
*
* This macro is used for declaring that the protosocket's protothread
* ends. It must always be used together with a matching PSOCK_BEGIN()
* macro.
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_END(psock) PT_END(&((psock)->pt))
char psock_newdata(struct psock *s);
/**
* Check if new data has arrived on a protosocket.
*
* This macro is used in conjunction with the PSOCK_WAIT_UNTIL()
* macro to check if data has arrived on a protosocket.
*
* \param psock (struct psock *) A pointer to the protosocket.
*
* \hideinitializer
*/
#define PSOCK_NEWDATA(psock) psock_newdata(psock)
/**
* Wait until a condition is true.
*
* This macro blocks the protothread until the specified condition is
* true. The macro PSOCK_NEWDATA() can be used to check if new data
* arrives when the protosocket is waiting.
*
* Typically, this macro is used as follows:
*
\code
PT_THREAD(thread(struct psock *s, struct timer *t))
{
PSOCK_BEGIN(s);
PSOCK_WAIT_UNTIL(s, PSOCK_NEWADATA(s) || timer_expired(t));
if(PSOCK_NEWDATA(s)) {
PSOCK_READTO(s, '\n');
} else {
handle_timed_out(s);
}
PSOCK_END(s);
}
\endcode
*
* \param psock (struct psock *) A pointer to the protosocket.
* \param condition The condition to wait for.
*
* \hideinitializer
*/
#define PSOCK_WAIT_UNTIL(psock, condition) \
PT_WAIT_UNTIL(&((psock)->pt), (condition));
#define PSOCK_WAIT_THREAD(psock, condition) \
PT_WAIT_THREAD(&((psock)->pt), (condition))
#endif /* __PSOCK_H__ */
/** @} */

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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: pt.h,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
/**
* \addtogroup pt
* @{
*/
/**
* \file
* Protothreads implementation.
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifndef __PT_H__
#define __PT_H__
#include "lc.h"
struct pt {
lc_t lc;
};
#define PT_WAITING 0
#define PT_EXITED 1
#define PT_ENDED 2
#define PT_YIELDED 3
/**
* \name Initialization
* @{
*/
/**
* Initialize a protothread.
*
* Initializes a protothread. Initialization must be done prior to
* starting to execute the protothread.
*
* \param pt A pointer to the protothread control structure.
*
* \sa PT_SPAWN()
*
* \hideinitializer
*/
#define PT_INIT(pt) LC_INIT((pt)->lc)
/** @} */
/**
* \name Declaration and definition
* @{
*/
/**
* Declaration of a protothread.
*
* This macro is used to declare a protothread. All protothreads must
* be declared with this macro.
*
* \param name_args The name and arguments of the C function
* implementing the protothread.
*
* \hideinitializer
*/
#define PT_THREAD(name_args) char name_args
/**
* Declare the start of a protothread inside the C function
* implementing the protothread.
*
* This macro is used to declare the starting point of a
* protothread. It should be placed at the start of the function in
* which the protothread runs. All C statements above the PT_BEGIN()
* invokation will be executed each time the protothread is scheduled.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_BEGIN(pt) { char PT_YIELD_FLAG = 1; LC_RESUME((pt)->lc)
/**
* Declare the end of a protothread.
*
* This macro is used for declaring that a protothread ends. It must
* always be used together with a matching PT_BEGIN() macro.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_END(pt) LC_END((pt)->lc); PT_YIELD_FLAG = 0; \
PT_INIT(pt); return PT_ENDED; }
/** @} */
/**
* \name Blocked wait
* @{
*/
/**
* Block and wait until condition is true.
*
* This macro blocks the protothread until the specified condition is
* true.
*
* \param pt A pointer to the protothread control structure.
* \param condition The condition.
*
* \hideinitializer
*/
#define PT_WAIT_UNTIL(pt, condition) \
do { \
LC_SET((pt)->lc); \
if(!(condition)) { \
return PT_WAITING; \
} \
} while(0)
/**
* Block and wait while condition is true.
*
* This function blocks and waits while condition is true. See
* PT_WAIT_UNTIL().
*
* \param pt A pointer to the protothread control structure.
* \param cond The condition.
*
* \hideinitializer
*/
#define PT_WAIT_WHILE(pt, cond) PT_WAIT_UNTIL((pt), !(cond))
/** @} */
/**
* \name Hierarchical protothreads
* @{
*/
/**
* Block and wait until a child protothread completes.
*
* This macro schedules a child protothread. The current protothread
* will block until the child protothread completes.
*
* \note The child protothread must be manually initialized with the
* PT_INIT() function before this function is used.
*
* \param pt A pointer to the protothread control structure.
* \param thread The child protothread with arguments
*
* \sa PT_SPAWN()
*
* \hideinitializer
*/
#define PT_WAIT_THREAD(pt, thread) PT_WAIT_WHILE((pt), PT_SCHEDULE(thread))
/**
* Spawn a child protothread and wait until it exits.
*
* This macro spawns a child protothread and waits until it exits. The
* macro can only be used within a protothread.
*
* \param pt A pointer to the protothread control structure.
* \param child A pointer to the child protothread's control structure.
* \param thread The child protothread with arguments
*
* \hideinitializer
*/
#define PT_SPAWN(pt, child, thread) \
do { \
PT_INIT((child)); \
PT_WAIT_THREAD((pt), (thread)); \
} while(0)
/** @} */
/**
* \name Exiting and restarting
* @{
*/
/**
* Restart the protothread.
*
* This macro will block and cause the running protothread to restart
* its execution at the place of the PT_BEGIN() call.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_RESTART(pt) \
do { \
PT_INIT(pt); \
return PT_WAITING; \
} while(0)
/**
* Exit the protothread.
*
* This macro causes the protothread to exit. If the protothread was
* spawned by another protothread, the parent protothread will become
* unblocked and can continue to run.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_EXIT(pt) \
do { \
PT_INIT(pt); \
return PT_EXITED; \
} while(0)
/** @} */
/**
* \name Calling a protothread
* @{
*/
/**
* Schedule a protothread.
*
* This function shedules a protothread. The return value of the
* function is non-zero if the protothread is running or zero if the
* protothread has exited.
*
* \param f The call to the C function implementing the protothread to
* be scheduled
*
* \hideinitializer
*/
#define PT_SCHEDULE(f) ((f) == PT_WAITING)
/** @} */
/**
* \name Yielding from a protothread
* @{
*/
/**
* Yield from the current protothread.
*
* This function will yield the protothread, thereby allowing other
* processing to take place in the system.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_YIELD(pt) \
do { \
PT_YIELD_FLAG = 0; \
LC_SET((pt)->lc); \
if(PT_YIELD_FLAG == 0) { \
return PT_YIELDED; \
} \
} while(0)
/**
* \brief Yield from the protothread until a condition occurs.
* \param pt A pointer to the protothread control structure.
* \param cond The condition.
*
* This function will yield the protothread, until the
* specified condition evaluates to true.
*
*
* \hideinitializer
*/
#define PT_YIELD_UNTIL(pt, cond) \
do { \
PT_YIELD_FLAG = 0; \
LC_SET((pt)->lc); \
if((PT_YIELD_FLAG == 0) || !(cond)) { \
return PT_YIELDED; \
} \
} while(0)
/** @} */
#endif /* __PT_H__ */
/** @} */

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/**
* \addtogroup uip
* {@
*/
/**
* \defgroup uiparch Architecture specific uIP functions
* @{
*
* The functions in the architecture specific module implement the IP
* check sum and 32-bit additions.
*
* The IP checksum calculation is the most computationally expensive
* operation in the TCP/IP stack and it therefore pays off to
* implement this in efficient assembler. The purpose of the uip-arch
* module is to let the checksum functions to be implemented in
* architecture specific assembler.
*
*/
/**
* \file
* Declarations of architecture specific functions.
* \author Adam Dunkels <adam@dunkels.com>
*/
/*
* Copyright (c) 2001, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip_arch.h,v 1.1 2006/06/17 22:41:19 adamdunkels Exp $
*
*/
#ifndef __UIP_ARCH_H__
#define __UIP_ARCH_H__
#include "net/uip.h"
/**
* Carry out a 32-bit addition.
*
* Because not all architectures for which uIP is intended has native
* 32-bit arithmetic, uIP uses an external C function for doing the
* required 32-bit additions in the TCP protocol processing. This
* function should add the two arguments and place the result in the
* global variable uip_acc32.
*
* \note The 32-bit integer pointed to by the op32 parameter and the
* result in the uip_acc32 variable are in network byte order (big
* endian).
*
* \param op32 A pointer to a 4-byte array representing a 32-bit
* integer in network byte order (big endian).
*
* \param op16 A 16-bit integer in host byte order.
*/
void uip_add32(u8_t *op32, u16_t op16);
/**
* Calculate the Internet checksum over a buffer.
*
* The Internet checksum is the one's complement of the one's
* complement sum of all 16-bit words in the buffer.
*
* See RFC1071.
*
* \note This function is not called in the current version of uIP,
* but future versions might make use of it.
*
* \param buf A pointer to the buffer over which the checksum is to be
* computed.
*
* \param len The length of the buffer over which the checksum is to
* be computed.
*
* \return The Internet checksum of the buffer.
*/
u16_t uip_chksum(u16_t *buf, u16_t len);
/**
* Calculate the IP header checksum of the packet header in uip_buf.
*
* The IP header checksum is the Internet checksum of the 20 bytes of
* the IP header.
*
* \return The IP header checksum of the IP header in the uip_buf
* buffer.
*/
u16_t uip_ipchksum(void);
/**
* Calculate the TCP checksum of the packet in uip_buf and uip_appdata.
*
* The TCP checksum is the Internet checksum of data contents of the
* TCP segment, and a pseudo-header as defined in RFC793.
*
* \note The uip_appdata pointer that points to the packet data may
* point anywhere in memory, so it is not possible to simply calculate
* the Internet checksum of the contents of the uip_buf buffer.
*
* \return The TCP checksum of the TCP segment in uip_buf and pointed
* to by uip_appdata.
*/
u16_t uip_tcpchksum(void);
u16_t uip_udpchksum(void);
/** @} */
/** @} */
#endif /* __UIP_ARCH_H__ */

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/**
* \addtogroup uip
* @{
*/
/**
* \addtogroup uiparp
* @{
*/
/**
* \file
* Macros and definitions for the ARP module.
* \author Adam Dunkels <adam@dunkels.com>
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip_arp.h,v 1.2 2006/08/26 23:58:45 oliverschmidt Exp $
*
*/
#ifndef __UIP_ARP_H__
#define __UIP_ARP_H__
#include "net/uip.h"
CCIF extern struct uip_eth_addr uip_ethaddr;
/**
* The Ethernet header.
*/
#include "net/pack_struct_start.h"
struct uip_eth_hdr
{
struct uip_eth_addr dest;
struct uip_eth_addr src;
u16_t type;
}
#include "net/pack_struct_end.h"
#define UIP_ETHTYPE_ARP 0x0806
#define UIP_ETHTYPE_IP 0x0800
#define UIP_ETHTYPE_IPV6 0x86dd
/* The uip_arp_init() function must be called before any of the other
ARP functions. */
void uip_arp_init( void );
/* The uip_arp_ipin() function should be called whenever an IP packet
arrives from the Ethernet. This function refreshes the ARP table or
inserts a new mapping if none exists. The function assumes that an
IP packet with an Ethernet header is present in the uip_buf buffer
and that the length of the packet is in the uip_len variable. */
/*void uip_arp_ipin(void);*/
#define uip_arp_ipin()
/* The uip_arp_arpin() should be called when an ARP packet is received
by the Ethernet driver. This function also assumes that the
Ethernet frame is present in the uip_buf buffer. When the
uip_arp_arpin() function returns, the contents of the uip_buf
buffer should be sent out on the Ethernet if the uip_len variable
is > 0. */
void uip_arp_arpin( void );
/* The uip_arp_out() function should be called when an IP packet
should be sent out on the Ethernet. This function creates an
Ethernet header before the IP header in the uip_buf buffer. The
Ethernet header will have the correct Ethernet MAC destination
address filled in if an ARP table entry for the destination IP
address (or the IP address of the default router) is present. If no
such table entry is found, the IP packet is overwritten with an ARP
request and we rely on TCP to retransmit the packet that was
overwritten. In any case, the uip_len variable holds the length of
the Ethernet frame that should be transmitted. */
void uip_arp_out( void );
/* The uip_arp_timer() function should be called every ten seconds. It
is responsible for flushing old entries in the ARP table. */
void uip_arp_timer( void );
/** @} */
/**
* \addtogroup uipconffunc
* @{
*/
/**
* Specifiy the Ethernet MAC address.
*
* The ARP code needs to know the MAC address of the Ethernet card in
* order to be able to respond to ARP queries and to generate working
* Ethernet headers.
*
* \note This macro only specifies the Ethernet MAC address to the ARP
* code. It cannot be used to change the MAC address of the Ethernet
* card.
*
* \param eaddr A pointer to a struct uip_eth_addr containing the
* Ethernet MAC address of the Ethernet card.
*
* \hideinitializer
*/
#define uip_setethaddr( eaddr ) \
do \
{ \
uip_ethaddr.addr[0] = eaddr.addr[0]; \
uip_ethaddr.addr[1] = eaddr.addr[1]; \
uip_ethaddr.addr[2] = eaddr.addr[2]; \
uip_ethaddr.addr[3] = eaddr.addr[3]; \
uip_ethaddr.addr[4] = eaddr.addr[4]; \
uip_ethaddr.addr[5] = eaddr.addr[5]; \
} while( 0 )
/** @} */
#endif /* __UIP_ARP_H__ */
/** @} */

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/**
* \addtogroup uip
* @{
*/
/**
* \defgroup uipopt Configuration options for uIP
* @{
*
* uIP is configured using the per-project configuration file
* "uipopt.h". This file contains all compile-time options for uIP and
* should be tweaked to match each specific project. The uIP
* distribution contains a documented example "uipopt.h" that can be
* copied and modified for each project.
*
* \note Contiki does not use the uipopt.h file to configure uIP, but
* uses a per-port uip-conf.h file that should be edited instead.
*/
/**
* \file
* Configuration options for uIP.
* \author Adam Dunkels <adam@dunkels.com>
*
* This file is used for tweaking various configuration options for
* uIP. You should make a copy of this file into one of your project's
* directories instead of editing this example "uipopt.h" file that
* comes with the uIP distribution.
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uipopt.h,v 1.11 2009/04/10 00:37:48 adamdunkels Exp $
*
*/
#ifndef __UIPOPT_H__
#define __UIPOPT_H__
#ifndef UIP_LITTLE_ENDIAN
#define UIP_LITTLE_ENDIAN 3412
#endif /* UIP_LITTLE_ENDIAN */
#ifndef UIP_BIG_ENDIAN
#define UIP_BIG_ENDIAN 1234
#endif /* UIP_BIG_ENDIAN */
#include "uip-conf.h"
//_RB_#include "contiki-conf.h"
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptstaticconf Static configuration options
* @{
*
* These configuration options can be used for setting the IP address
* settings statically, but only if UIP_FIXEDADDR is set to 1. The
* configuration options for a specific node includes IP address,
* netmask and default router as well as the Ethernet address. The
* netmask, default router and Ethernet address are applicable only
* if uIP should be run over Ethernet.
*
* This options are meaningful only for the IPv4 code.
*
* All of these should be changed to suit your project.
*/
/**
* Determines if uIP should use a fixed IP address or not.
*
* If uIP should use a fixed IP address, the settings are set in the
* uipopt.h file. If not, the macros uip_sethostaddr(),
* uip_setdraddr() and uip_setnetmask() should be used instead.
*
* \hideinitializer
*/
#ifdef UIP_CONF_FIXEDADDR
#define UIP_FIXED_ADDR UIP_CONF_FIXEDADDR
#define UIP_FIXEDADDR 1
#endif
/**
* Ping IP address assignment.
*
* uIP uses a "ping" packets for setting its own IP address if this
* option is set. If so, uIP will start with an empty IP address and
* the destination IP address of the first incoming "ping" (ICMP echo)
* packet will be used for setting the hosts IP address.
*
* \note This works only if UIP_FIXEDADDR is 0.
*
* \hideinitializer
*/
#ifdef UIP_CONF_PINGADDRCONF
#define UIP_PINGADDRCONF UIP_CONF_PINGADDRCONF
#else /* UIP_CONF_PINGADDRCONF */
#define UIP_PINGADDRCONF 0
#endif /* UIP_CONF_PINGADDRCONF */
/**
* Specifies if the uIP ARP module should be compiled with a fixed
* Ethernet MAC address or not.
*
* If this configuration option is 0, the macro uip_setethaddr() can
* be used to specify the Ethernet address at run-time.
*
* \hideinitializer
*/
#define UIP_FIXEDETHADDR 0
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptip IP configuration options
* @{
*
*/
/**
* The IP TTL (time to live) of IP packets sent by uIP.
*
* This should normally not be changed.
*/
#define UIP_TTL 64
/**
* The maximum time an IP fragment should wait in the reassembly
* buffer before it is dropped.
*
*/
#define UIP_REASS_MAXAGE 60 /*60s*/
/**
* Turn on support for IP packet reassembly.
*
* uIP supports reassembly of fragmented IP packets. This features
* requires an additional amount of RAM to hold the reassembly buffer
* and the reassembly code size is approximately 700 bytes. The
* reassembly buffer is of the same size as the uip_buf buffer
* (configured by UIP_BUFSIZE).
*
* \note IP packet reassembly is not heavily tested.
*
* \hideinitializer
*/
#ifdef UIP_CONF_REASSEMBLY
#define UIP_REASSEMBLY UIP_CONF_REASSEMBLY
#else /* UIP_CONF_REASSEMBLY */
#define UIP_REASSEMBLY 0
#endif /* UIP_CONF_REASSEMBLY */
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptipv6 IPv6 configuration options
* @{
*
*/
/** The maximum transmission unit at the IP Layer*/
#define UIP_LINK_MTU 1280
#ifndef UIP_CONF_IPV6
/** Do we use IPv6 or not (default: no) */
#define UIP_CONF_IPV6 0
#endif
#ifndef UIP_CONF_IPV6_QUEUE_PKT
/** Do we do per %neighbor queuing during address resolution (default: no) */
#define UIP_CONF_IPV6_QUEUE_PKT 0
#endif
#ifndef UIP_CONF_IPV6_CHECKS
/** Do we do IPv6 consistency checks (highly recommended, default: yes) */
#define UIP_CONF_IPV6_CHECKS 1
#endif
#ifndef UIP_CONF_IPV6_REASSEMBLY
/** Do we do IPv6 fragmentation (default: no) */
#define UIP_CONF_IPV6_REASSEMBLY 0
#endif
#ifndef UIP_CONF_NETIF_MAX_ADDRESSES
/** Default number of IPv6 addresses associated to the node's interface */
#define UIP_CONF_NETIF_MAX_ADDRESSES 3
#endif
#ifndef UIP_CONF_ND6_MAX_PREFIXES
/** Default number of IPv6 prefixes associated to the node's interface */
#define UIP_CONF_ND6_MAX_PREFIXES 3
#endif
#ifndef UIP_CONF_ND6_MAX_NEIGHBORS
/** Default number of neighbors that can be stored in the %neighbor cache */
#define UIP_CONF_ND6_MAX_NEIGHBORS 4
#endif
#ifndef UIP_CONF_ND6_MAX_DEFROUTERS
/** Minimum number of default routers */
#define UIP_CONF_ND6_MAX_DEFROUTERS 2
#endif
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptudp UDP configuration options
* @{
*
* \note The UDP support in uIP is still not entirely complete; there
* is no support for sending or receiving broadcast or multicast
* packets, but it works well enough to support a number of vital
* applications such as DNS queries, though
*/
/**
* Toggles whether UDP support should be compiled in or not.
*
* \hideinitializer
*/
#ifdef UIP_CONF_UDP
#define UIP_UDP UIP_CONF_UDP
#else /* UIP_CONF_UDP */
#define UIP_UDP 0
#endif /* UIP_CONF_UDP */
/**
* Toggles if UDP checksums should be used or not.
*
* \note Support for UDP checksums is currently not included in uIP,
* so this option has no function.
*
* \hideinitializer
*/
#ifdef UIP_CONF_UDP_CHECKSUMS
#define UIP_UDP_CHECKSUMS UIP_CONF_UDP_CHECKSUMS
#else
#define UIP_UDP_CHECKSUMS 0
#endif
/**
* The maximum amount of concurrent UDP connections.
*
* \hideinitializer
*/
#ifdef UIP_CONF_UDP_CONNS
#define UIP_UDP_CONNS UIP_CONF_UDP_CONNS
#else /* UIP_CONF_UDP_CONNS */
#define UIP_UDP_CONNS 10
#endif /* UIP_CONF_UDP_CONNS */
/**
* The name of the function that should be called when UDP datagrams arrive.
*
* \hideinitializer
*/
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipopttcp TCP configuration options
* @{
*/
/**
* Toggles whether UDP support should be compiled in or not.
*
* \hideinitializer
*/
#ifdef UIP_CONF_TCP
#define UIP_TCP UIP_CONF_TCP
#else /* UIP_CONF_UDP */
#define UIP_TCP 1
#endif /* UIP_CONF_UDP */
/**
* Determines if support for opening connections from uIP should be
* compiled in.
*
* If the applications that are running on top of uIP for this project
* do not need to open outgoing TCP connections, this configuration
* option can be turned off to reduce the code size of uIP.
*
* \hideinitializer
*/
#ifndef UIP_CONF_ACTIVE_OPEN
#define UIP_ACTIVE_OPEN 1
#else /* UIP_CONF_ACTIVE_OPEN */
#define UIP_ACTIVE_OPEN UIP_CONF_ACTIVE_OPEN
#endif /* UIP_CONF_ACTIVE_OPEN */
/**
* The maximum number of simultaneously open TCP connections.
*
* Since the TCP connections are statically allocated, turning this
* configuration knob down results in less RAM used. Each TCP
* connection requires approximately 30 bytes of memory.
*
* \hideinitializer
*/
#ifndef UIP_CONF_MAX_CONNECTIONS
#define UIP_CONNS 10
#else /* UIP_CONF_MAX_CONNECTIONS */
#define UIP_CONNS UIP_CONF_MAX_CONNECTIONS
#endif /* UIP_CONF_MAX_CONNECTIONS */
/**
* The maximum number of simultaneously listening TCP ports.
*
* Each listening TCP port requires 2 bytes of memory.
*
* \hideinitializer
*/
#ifndef UIP_CONF_MAX_LISTENPORTS
#define UIP_LISTENPORTS 20
#else /* UIP_CONF_MAX_LISTENPORTS */
#define UIP_LISTENPORTS UIP_CONF_MAX_LISTENPORTS
#endif /* UIP_CONF_MAX_LISTENPORTS */
/**
* Determines if support for TCP urgent data notification should be
* compiled in.
*
* Urgent data (out-of-band data) is a rarely used TCP feature that
* very seldom would be required.
*
* \hideinitializer
*/
#define UIP_URGDATA 0
/**
* The initial retransmission timeout counted in timer pulses.
*
* This should not be changed.
*/
#define UIP_RTO 3
/**
* The maximum number of times a segment should be retransmitted
* before the connection should be aborted.
*
* This should not be changed.
*/
#define UIP_MAXRTX 8
/**
* The maximum number of times a SYN segment should be retransmitted
* before a connection request should be deemed to have been
* unsuccessful.
*
* This should not need to be changed.
*/
#define UIP_MAXSYNRTX 5
/**
* The TCP maximum segment size.
*
* This is should not be to set to more than
* UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN.
*/
#ifdef UIP_CONF_TCP_MSS
#define UIP_TCP_MSS UIP_CONF_TCP_MSS
#else
#define UIP_TCP_MSS ( UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN )
#endif
/**
* The size of the advertised receiver's window.
*
* Should be set low (i.e., to the size of the uip_buf buffer) if the
* application is slow to process incoming data, or high (32768 bytes)
* if the application processes data quickly.
*
* \hideinitializer
*/
#ifndef UIP_CONF_RECEIVE_WINDOW
#define UIP_RECEIVE_WINDOW UIP_TCP_MSS
#else
#define UIP_RECEIVE_WINDOW UIP_CONF_RECEIVE_WINDOW
#endif
/**
* How long a connection should stay in the TIME_WAIT state.
*
* This configuration option has no real implication, and it should be
* left untouched.
*/
#define UIP_TIME_WAIT_TIMEOUT 120
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptarp ARP configuration options
* @{
*/
/**
* The size of the ARP table.
*
* This option should be set to a larger value if this uIP node will
* have many connections from the local network.
*
* \hideinitializer
*/
#ifdef UIP_CONF_ARPTAB_SIZE
#define UIP_ARPTAB_SIZE UIP_CONF_ARPTAB_SIZE
#else
#define UIP_ARPTAB_SIZE 8
#endif
/**
* The maximum age of ARP table entries measured in 10ths of seconds.
*
* An UIP_ARP_MAXAGE of 120 corresponds to 20 minutes (BSD
* default).
*/
#define UIP_ARP_MAXAGE 120
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptmac layer 2 options (for ipv6)
* @{
*/
#define UIP_DEFAULT_PREFIX_LEN 64
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptsics 6lowpan options (for ipv6)
* @{
*/
/**
* Timeout for packet reassembly at the 6lowpan layer
* (should be < 60s)
*/
#ifdef SICSLOWPAN_CONF_MAXAGE
#define SICSLOWPAN_REASS_MAXAGE SICSLOWPAN_CONF_MAXAGE
#else
#define SICSLOWPAN_REASS_MAXAGE 20
#endif
/**
* Do we compress the IP header or not (default: no)
*/
#ifndef SICSLOWPAN_CONF_COMPRESSION
#define SICSLOWPAN_CONF_COMPRESSION 0
#endif
/**
* If we use IPHC compression, how many address contexts do we support
*/
#ifndef SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS
#define SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS 1
#endif
/**
* Do we support 6lowpan fragmentation
*/
#ifndef SICSLOWPAN_CONF_FRAG
#define SICSLOWPAN_CONF_FRAG 0
#endif
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptgeneral General configuration options
* @{
*/
/**
* The size of the uIP packet buffer.
*
* The uIP packet buffer should not be smaller than 60 bytes, and does
* not need to be larger than 1514 bytes. Lower size results in lower
* TCP throughput, larger size results in higher TCP throughput.
*
* \hideinitializer
*/
#ifndef UIP_CONF_BUFFER_SIZE
#define UIP_BUFSIZE UIP_LINK_MTU + UIP_LLH_LEN
#else /* UIP_CONF_BUFFER_SIZE */
#define UIP_BUFSIZE UIP_CONF_BUFFER_SIZE
#endif /* UIP_CONF_BUFFER_SIZE */
/**
* Determines if statistics support should be compiled in.
*
* The statistics is useful for debugging and to show the user.
*
* \hideinitializer
*/
#ifndef UIP_CONF_STATISTICS
#define UIP_STATISTICS 0
#else /* UIP_CONF_STATISTICS */
#define UIP_STATISTICS UIP_CONF_STATISTICS
#endif /* UIP_CONF_STATISTICS */
/**
* Determines if logging of certain events should be compiled in.
*
* This is useful mostly for debugging. The function uip_log()
* must be implemented to suit the architecture of the project, if
* logging is turned on.
*
* \hideinitializer
*/
#ifndef UIP_CONF_LOGGING
#define UIP_LOGGING 0
#else /* UIP_CONF_LOGGING */
#define UIP_LOGGING UIP_CONF_LOGGING
#endif /* UIP_CONF_LOGGING */
/**
* Broadcast support.
*
* This flag configures IP broadcast support. This is useful only
* together with UDP.
*
* \hideinitializer
*
*/
#ifndef UIP_CONF_BROADCAST
#define UIP_BROADCAST 0
#else /* UIP_CONF_BROADCAST */
#define UIP_BROADCAST UIP_CONF_BROADCAST
#endif /* UIP_CONF_BROADCAST */
/**
* Print out a uIP log message.
*
* This function must be implemented by the module that uses uIP, and
* is called by uIP whenever a log message is generated.
*/
void uip_log( char *msg );
/**
* The link level header length.
*
* This is the offset into the uip_buf where the IP header can be
* found. For Ethernet, this should be set to 14. For SLIP, this
* should be set to 0.
*
* \note we probably won't use this constant for other link layers than
* ethernet as they have variable header length (this is due to variable
* number and type of address fields and to optional security features)
* E.g.: 802.15.4 -> 2 + (1/2*4/8) + 0/5/6/10/14
* 802.11 -> 4 + (6*3/4) + 2
* \hideinitializer
*/
#ifdef UIP_CONF_LLH_LEN
#define UIP_LLH_LEN UIP_CONF_LLH_LEN
#else /* UIP_LLH_LEN */
#define UIP_LLH_LEN 14
#endif /* UIP_CONF_LLH_LEN */
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptcpu CPU architecture configuration
* @{
*
* The CPU architecture configuration is where the endianess of the
* CPU on which uIP is to be run is specified. Most CPUs today are
* little endian, and the most notable exception are the Motorolas
* which are big endian. The BYTE_ORDER macro should be changed to
* reflect the CPU architecture on which uIP is to be run.
*/
/**
* The byte order of the CPU architecture on which uIP is to be run.
*
* This option can be either UIP_BIG_ENDIAN (Motorola byte order) or
* UIP_LITTLE_ENDIAN (Intel byte order).
*
* \hideinitializer
*/
#ifdef UIP_CONF_BYTE_ORDER
#define UIP_BYTE_ORDER UIP_CONF_BYTE_ORDER
#else /* UIP_CONF_BYTE_ORDER */
#define UIP_BYTE_ORDER UIP_LITTLE_ENDIAN
#endif /* UIP_CONF_BYTE_ORDER */
/** @} */
/*------------------------------------------------------------------------------*/
/**
* \defgroup uipoptapp Application specific configurations
* @{
*
* An uIP application is implemented using a single application
* function that is called by uIP whenever a TCP/IP event occurs. The
* name of this function must be registered with uIP at compile time
* using the UIP_APPCALL definition.
*
* uIP applications can store the application state within the
* uip_conn structure by specifying the type of the application
* structure by typedef:ing the type uip_tcp_appstate_t and uip_udp_appstate_t.
*
* The file containing the definitions must be included in the
* uipopt.h file.
*
* The following example illustrates how this can look.
\code
void httpd_appcall(void);
#define UIP_APPCALL httpd_appcall
struct httpd_state {
u8_t state;
u16_t count;
char *dataptr;
char *script;
};
typedef struct httpd_state uip_tcp_appstate_t
\endcode
*/
/**
* \var #define UIP_APPCALL
*
* The name of the application function that uIP should call in
* response to TCP/IP events.
*
*/
/**
* \var typedef uip_tcp_appstate_t
*
* The type of the application state that is to be stored in the
* uip_conn structure. This usually is typedef:ed to a struct holding
* application state information.
*/
/**
* \var typedef uip_udp_appstate_t
*
* The type of the application state that is to be stored in the
* uip_conn structure. This usually is typedef:ed to a struct holding
* application state information.
*/
/** @} */
#endif /* __UIPOPT_H__ */
/** @} */
/** @} */

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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: psock.c,v 1.2 2006/06/12 08:00:30 adam Exp $
*/
#include <stdio.h>
#include <string.h>
#include "net/uipopt.h"
#include "net/psock.h"
#include "net/uip.h"
#define STATE_NONE 0
#define STATE_ACKED 1
#define STATE_READ 2
#define STATE_BLOCKED_NEWDATA 3
#define STATE_BLOCKED_CLOSE 4
#define STATE_BLOCKED_SEND 5
#define STATE_DATA_SENT 6
/*
* Return value of the buffering functions that indicates that a
* buffer was not filled by incoming data.
*
*/
#define BUF_NOT_FULL 0
#define BUF_NOT_FOUND 0
/*
* Return value of the buffering functions that indicates that a
* buffer was completely filled by incoming data.
*
*/
#define BUF_FULL 1
/*
* Return value of the buffering functions that indicates that an
* end-marker byte was found.
*
*/
#define BUF_FOUND 2
/*---------------------------------------------------------------------------*/
static void
buf_setup(struct psock_buf *buf,
u8_t *bufptr, u16_t bufsize)
{
buf->ptr = bufptr;
buf->left = bufsize;
}
/*---------------------------------------------------------------------------*/
static u8_t
buf_bufdata(struct psock_buf *buf, u16_t len,
u8_t **dataptr, u16_t *datalen)
{
( void ) len;
if(*datalen < buf->left) {
memcpy(buf->ptr, *dataptr, *datalen);
buf->ptr += *datalen;
buf->left -= *datalen;
*dataptr += *datalen;
*datalen = 0;
return BUF_NOT_FULL;
} else if(*datalen == buf->left) {
memcpy(buf->ptr, *dataptr, *datalen);
buf->ptr += *datalen;
buf->left = 0;
*dataptr += *datalen;
*datalen = 0;
return BUF_FULL;
} else {
memcpy(buf->ptr, *dataptr, buf->left);
buf->ptr += buf->left;
*datalen -= buf->left;
*dataptr += buf->left;
buf->left = 0;
return BUF_FULL;
}
}
/*---------------------------------------------------------------------------*/
static u8_t
buf_bufto(register struct psock_buf *buf, u8_t endmarker,
register u8_t **dataptr, register u16_t *datalen)
{
u8_t c;
while(buf->left > 0 && *datalen > 0) {
c = *buf->ptr = **dataptr;
++*dataptr;
++buf->ptr;
--*datalen;
--buf->left;
if(c == endmarker) {
return BUF_FOUND;
}
}
if(*datalen == 0) {
return BUF_NOT_FOUND;
}
while(*datalen > 0) {
c = **dataptr;
--*datalen;
++*dataptr;
if(c == endmarker) {
return BUF_FOUND | BUF_FULL;
}
}
return BUF_FULL;
}
/*---------------------------------------------------------------------------*/
static char
send_data(register struct psock *s)
{
if(s->state != STATE_DATA_SENT || uip_rexmit()) {
if(s->sendlen > uip_mss()) {
uip_send(s->sendptr, uip_mss());
} else {
uip_send(s->sendptr, s->sendlen);
}
s->state = STATE_DATA_SENT;
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static char
data_acked(register struct psock *s)
{
if(s->state == STATE_DATA_SENT && uip_acked()) {
if(s->sendlen > uip_mss()) {
s->sendlen -= uip_mss();
s->sendptr += uip_mss();
} else {
s->sendptr += s->sendlen;
s->sendlen = 0;
}
s->state = STATE_ACKED;
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
PT_THREAD(psock_send(register struct psock *s, const char *buf,
unsigned int len))
{
PT_BEGIN(&s->psockpt);
( void ) PT_YIELD_FLAG;
/* If there is no data to send, we exit immediately. */
if(len == 0) {
PT_EXIT(&s->psockpt);
}
/* Save the length of and a pointer to the data that is to be
sent. */
s->sendptr = (unsigned char*)buf;
s->sendlen = (unsigned short)len;
s->state = STATE_NONE;
/* We loop here until all data is sent. The s->sendlen variable is
updated by the data_sent() function. */
while(s->sendlen > 0) {
/*
* The condition for this PT_WAIT_UNTIL is a little tricky: the
* protothread will wait here until all data has been acknowledged
* (data_acked() returns true) and until all data has been sent
* (send_data() returns true). The two functions data_acked() and
* send_data() must be called in succession to ensure that all
* data is sent. Therefore the & operator is used instead of the
* && operator, which would cause only the data_acked() function
* to be called when it returns false.
*/
PT_WAIT_UNTIL(&s->psockpt, data_acked(s) & send_data(s));
}
s->state = STATE_NONE;
PT_END(&s->psockpt);
}
/*---------------------------------------------------------------------------*/
PT_THREAD(psock_generator_send(register struct psock *s,
unsigned short (*generate)(void *), void *arg))
{
PT_BEGIN(&s->psockpt);
( void ) PT_YIELD_FLAG;
/* Ensure that there is a generator function to call. */
if(generate == NULL) {
PT_EXIT(&s->psockpt);
}
/* Call the generator function to generate the data in the
uip_appdata buffer. */
s->sendlen = generate(arg);
s->sendptr = uip_appdata;
s->state = STATE_NONE;
do {
/* Call the generator function again if we are called to perform a
retransmission. */
if(uip_rexmit()) {
generate(arg);
}
/* Wait until all data is sent and acknowledged. */
PT_WAIT_UNTIL(&s->psockpt, data_acked(s) & send_data(s));
} while(s->sendlen > 0);
s->state = STATE_NONE;
PT_END(&s->psockpt);
}
/*---------------------------------------------------------------------------*/
u16_t
psock_datalen(struct psock *psock)
{
return psock->bufsize - psock->buf.left;
}
/*---------------------------------------------------------------------------*/
char
psock_newdata(struct psock *s)
{
if(s->readlen > 0) {
/* There is data in the uip_appdata buffer that has not yet been
read with the PSOCK_READ functions. */
return 1;
} else if(s->state == STATE_READ) {
/* All data in uip_appdata buffer already consumed. */
s->state = STATE_BLOCKED_NEWDATA;
return 0;
} else if(uip_newdata()) {
/* There is new data that has not been consumed. */
return 1;
} else {
/* There is no new data. */
return 0;
}
}
/*---------------------------------------------------------------------------*/
PT_THREAD(psock_readto(register struct psock *psock, unsigned char c))
{
PT_BEGIN(&psock->psockpt);
( void ) PT_YIELD_FLAG;
buf_setup(&psock->buf, (unsigned char*)psock->bufptr, psock->bufsize);
/* XXX: Should add buf_checkmarker() before do{} loop, if
incoming data has been handled while waiting for a write. */
do {
if(psock->readlen == 0) {
PT_WAIT_UNTIL(&psock->psockpt, psock_newdata(psock));
psock->state = STATE_READ;
psock->readptr = (u8_t *)uip_appdata;
psock->readlen = uip_datalen();
}
} while((buf_bufto(&psock->buf, c,
&psock->readptr,
&psock->readlen) & BUF_FOUND) == 0);
if(psock_datalen(psock) == 0) {
psock->state = STATE_NONE;
PT_RESTART(&psock->psockpt);
}
PT_END(&psock->psockpt);
}
/*---------------------------------------------------------------------------*/
PT_THREAD(psock_readbuf(register struct psock *psock))
{
PT_BEGIN(&psock->psockpt);
( void ) PT_YIELD_FLAG;
buf_setup(&psock->buf, (unsigned char * ) psock->bufptr, psock->bufsize);
/* XXX: Should add buf_checkmarker() before do{} loop, if
incoming data has been handled while waiting for a write. */
do {
if(psock->readlen == 0) {
PT_WAIT_UNTIL(&psock->psockpt, psock_newdata(psock));
psock->state = STATE_READ;
psock->readptr = (u8_t *)uip_appdata;
psock->readlen = uip_datalen();
}
} while(buf_bufdata(&psock->buf, psock->bufsize,
&psock->readptr,
&psock->readlen) != BUF_FULL);
if(psock_datalen(psock) == 0) {
psock->state = STATE_NONE;
PT_RESTART(&psock->psockpt);
}
PT_END(&psock->psockpt);
}
/*---------------------------------------------------------------------------*/
void
psock_init(register struct psock *psock, char *buffer, unsigned int buffersize)
{
psock->state = STATE_NONE;
psock->readlen = 0;
psock->bufptr = buffer;
psock->bufsize = buffersize;
buf_setup(&psock->buf, (unsigned char*) buffer, buffersize);
PT_INIT(&psock->pt);
PT_INIT(&psock->psockpt);
}
/*---------------------------------------------------------------------------*/

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/** \addtogroup sys
* @{
*/
/**
* \defgroup clock Clock library
*
* The clock library is the interface between Contiki and the platform
* specific clock functionality. The clock library performs a single
* function: measuring time. Additionally, the clock library provides
* a macro, CLOCK_SECOND, which corresponds to one second of system
* time.
*
* \note The clock library need in many cases not be used
* directly. Rather, the \ref timer "timer library" or the \ref etimer
* "event timers" should be used.
*
* \sa \ref timer "Timer library"
* \sa \ref etimer "Event timers"
*
* @{
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: clock.h,v 1.11 2009/01/24 15:20:11 adamdunkels Exp $
*/
#ifndef __CLOCK_H__
#define __CLOCK_H__
#include "net/clock-arch.h"
//_RB_#include "contiki-conf.h"
#if 0 /* XXX problems with signedness and use in timer_expired(). #if:ed it out for now. */
/**
* Check if a clock time value is less than another clock time value.
*
* This macro checks if a clock time value is less than another clock
* time value. This macro is needed to correctly handle wrap-around of
* clock time values.
*
*/
#define CLOCK_LT( a, b ) ( (clock_time_t) ((a) - (b)) < ((clock_time_t) (~((clock_time_t) 0)) >> 1) )
#endif /* 0 */
/**
* Initialize the clock library.
*
* This function initializes the clock library and should be called
* from the main() function of the system.
*
*/
void clock_init( void );
/**
* Get the current clock time.
*
* This function returns the current system clock time.
*
* \return The current clock time, measured in system ticks.
*/
CCIF clock_time_t clock_time( void );
void clock_delay( unsigned int );
/**
* A second, measured in system clock time.
*
* \hideinitializer
*/
#ifdef CLOCK_CONF_SECOND
#define CLOCK_SECOND CLOCK_CONF_SECOND
#else
#define CLOCK_SECOND ( clock_time_t ) 32
#endif
int clock_fine_max( void );
unsigned short clock_fine( void );
CCIF unsigned long clock_seconds( void );
#endif /* __CLOCK_H__ */
/** @} */
/** @} */

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/*
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: pt.h,v 1.3 2008/10/14 12:46:39 nvt-se Exp $
*/
/**
* \addtogroup pt
* @{
*/
/**
* \file
* Protothreads implementation.
* \author
* Adam Dunkels <adam@sics.se>
*
*/
#ifndef __PT_H__
#define __PT_H__
#include "sys/lc.h"
struct pt
{
lc_t lc;
};
#define PT_WAITING 0
#define PT_YIELDED 1
#define PT_EXITED 2
#define PT_ENDED 3
/**
* \name Initialization
* @{
*/
/**
* Initialize a protothread.
*
* Initializes a protothread. Initialization must be done prior to
* starting to execute the protothread.
*
* \param pt A pointer to the protothread control structure.
*
* \sa PT_SPAWN()
*
* \hideinitializer
*/
#define PT_INIT( pt ) LC_INIT( (pt)->lc )
/** @} */
/**
* \name Declaration and definition
* @{
*/
/**
* Declaration of a protothread.
*
* This macro is used to declare a protothread. All protothreads must
* be declared with this macro.
*
* \param name_args The name and arguments of the C function
* implementing the protothread.
*
* \hideinitializer
*/
#define PT_THREAD( name_args ) char name_args
/**
* Declare the start of a protothread inside the C function
* implementing the protothread.
*
* This macro is used to declare the starting point of a
* protothread. It should be placed at the start of the function in
* which the protothread runs. All C statements above the PT_BEGIN()
* invokation will be executed each time the protothread is scheduled.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_BEGIN( pt ) \
{ \
char PT_YIELD_FLAG = 1; \
LC_RESUME( (pt)->lc )
/**
* Declare the end of a protothread.
*
* This macro is used for declaring that a protothread ends. It must
* always be used together with a matching PT_BEGIN() macro.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_END( pt ) \
LC_END( (pt)->lc ); \
PT_YIELD_FLAG = 0; \
PT_INIT( pt ); \
return PT_ENDED; \
}
/** @} */
/**
* \name Blocked wait
* @{
*/
/**
* Block and wait until condition is true.
*
* This macro blocks the protothread until the specified condition is
* true.
*
* \param pt A pointer to the protothread control structure.
* \param condition The condition.
*
* \hideinitializer
*/
#define PT_WAIT_UNTIL( pt, condition ) \
do \
{ \
LC_SET( (pt)->lc ); \
if( !(condition) ) \
{ \
return PT_WAITING; \
} \
} while( 0 )
/**
* Block and wait while condition is true.
*
* This function blocks and waits while condition is true. See
* PT_WAIT_UNTIL().
*
* \param pt A pointer to the protothread control structure.
* \param cond The condition.
*
* \hideinitializer
*/
#define PT_WAIT_WHILE( pt, cond ) PT_WAIT_UNTIL( (pt), !(cond) )
/** @} */
/**
* \name Hierarchical protothreads
* @{
*/
/**
* Block and wait until a child protothread completes.
*
* This macro schedules a child protothread. The current protothread
* will block until the child protothread completes.
*
* \note The child protothread must be manually initialized with the
* PT_INIT() function before this function is used.
*
* \param pt A pointer to the protothread control structure.
* \param thread The child protothread with arguments
*
* \sa PT_SPAWN()
*
* \hideinitializer
*/
#define PT_WAIT_THREAD( pt, thread ) PT_WAIT_WHILE( (pt), PT_SCHEDULE(thread) )
/**
* Spawn a child protothread and wait until it exits.
*
* This macro spawns a child protothread and waits until it exits. The
* macro can only be used within a protothread.
*
* \param pt A pointer to the protothread control structure.
* \param child A pointer to the child protothread's control structure.
* \param thread The child protothread with arguments
*
* \hideinitializer
*/
#define PT_SPAWN( pt, child, thread ) \
do \
{ \
PT_INIT( (child) ); \
PT_WAIT_THREAD( (pt), (thread) ); \
} while( 0 )
/** @} */
/**
* \name Exiting and restarting
* @{
*/
/**
* Restart the protothread.
*
* This macro will block and cause the running protothread to restart
* its execution at the place of the PT_BEGIN() call.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_RESTART( pt ) \
do \
{ \
PT_INIT( pt ); \
return PT_WAITING; \
} while( 0 )
/**
* Exit the protothread.
*
* This macro causes the protothread to exit. If the protothread was
* spawned by another protothread, the parent protothread will become
* unblocked and can continue to run.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_EXIT( pt ) \
do \
{ \
PT_INIT( pt ); \
return PT_EXITED; \
} while( 0 )
/** @} */
/**
* \name Calling a protothread
* @{
*/
/**
* Schedule a protothread.
*
* This function schedules a protothread. The return value of the
* function is non-zero if the protothread is running or zero if the
* protothread has exited.
*
* \param f The call to the C function implementing the protothread to
* be scheduled
*
* \hideinitializer
*/
#define PT_SCHEDULE( f ) ( (f) < PT_EXITED )
/** @} */
/**
* \name Yielding from a protothread
* @{
*/
/**
* Yield from the current protothread.
*
* This function will yield the protothread, thereby allowing other
* processing to take place in the system.
*
* \param pt A pointer to the protothread control structure.
*
* \hideinitializer
*/
#define PT_YIELD( pt ) \
do \
{ \
PT_YIELD_FLAG = 0; \
LC_SET( (pt)->lc ); \
if( PT_YIELD_FLAG == 0 ) \
{ \
return PT_YIELDED; \
} \
} while( 0 )
/**
* \brief Yield from the protothread until a condition occurs.
* \param pt A pointer to the protothread control structure.
* \param cond The condition.
*
* This function will yield the protothread, until the
* specified condition evaluates to true.
*
*
* \hideinitializer
*/
#define PT_YIELD_UNTIL( pt, cond ) \
do \
{ \
PT_YIELD_FLAG = 0; \
LC_SET( (pt)->lc ); \
if( (PT_YIELD_FLAG == 0) || !(cond) ) \
{ \
return PT_YIELDED; \
} \
} while( 0 )
/** @} */
#endif /* __PT_H__ */
/** @} */

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/** \addtogroup sys
* @{ */
/**
* \defgroup timer Timer library
*
* The Contiki kernel does not provide support for timed
* events. Rather, an application that wants to use timers needs to
* explicitly use the timer library.
*
* The timer library provides functions for setting, resetting and
* restarting timers, and for checking if a timer has expired. An
* application must "manually" check if its timers have expired; this
* is not done automatically.
*
* A timer is declared as a \c struct \c timer and all access to the
* timer is made by a pointer to the declared timer.
*
* \note The timer library is not able to post events when a timer
* expires. The \ref etimer "Event timers" should be used for this
* purpose.
*
* \note The timer library uses the \ref clock "Clock library" to
* measure time. Intervals should be specified in the format used by
* the clock library.
*
* \sa \ref etimer "Event timers"
*
* @{
*/
/**
* \file
* Timer library header file.
* \author
* Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: timer.h,v 1.2 2008/09/21 08:58:05 adamdunkels Exp $
*/
#ifndef __TIMER_H__
#define __TIMER_H__
#include "sys/clock.h"
/**
* A timer.
*
* This structure is used for declaring a timer. The timer must be set
* with timer_set() before it can be used.
*
* \hideinitializer
*/
struct timer
{
clock_time_t start;
clock_time_t interval;
};
void timer_set( struct timer *t, clock_time_t interval );
void timer_reset( struct timer *t );
void timer_restart( struct timer *t );
int timer_expired( struct timer *t );
clock_time_t timer_remaining( struct timer *t );
#endif /* __TIMER_H__ */
/** @} */
/** @} */

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/**
* \addtogroup timer
* @{
*/
/**
* \file
* Timer library implementation.
* \author
* Adam Dunkels <adam@sics.se>
*/
/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: timer.c,v 1.5 2009/01/24 15:20:11 adamdunkels Exp $
*/
//_RB_#include "contiki-conf.h"
#include "uip-conf.h"
#include "net/clock-arch.h"
#include "sys/clock.h"
#include "sys/timer.h"
/*---------------------------------------------------------------------------*/
/**
* Set a timer.
*
* This function is used to set a timer for a time sometime in the
* future. The function timer_expired() will evaluate to true after
* the timer has expired.
*
* \param t A pointer to the timer
* \param interval The interval before the timer expires.
*
*/
void timer_set( struct timer *t, clock_time_t interval )
{
t->interval = interval;
t->start = clock_time();
}
/*---------------------------------------------------------------------------*/
/**
* Reset the timer with the same interval.
*
* This function resets the timer with the same interval that was
* given to the timer_set() function. The start point of the interval
* is the exact time that the timer last expired. Therefore, this
* function will cause the timer to be stable over time, unlike the
* timer_restart() function.
*
* \param t A pointer to the timer.
*
* \sa timer_restart()
*/
void timer_reset( struct timer *t )
{
t->start += t->interval;
}
/*---------------------------------------------------------------------------*/
/**
* Restart the timer from the current point in time
*
* This function restarts a timer with the same interval that was
* given to the timer_set() function. The timer will start at the
* current time.
*
* \note A periodic timer will drift if this function is used to reset
* it. For preioric timers, use the timer_reset() function instead.
*
* \param t A pointer to the timer.
*
* \sa timer_reset()
*/
void timer_restart( struct timer *t )
{
t->start = clock_time();
}
/*---------------------------------------------------------------------------*/
/**
* Check if a timer has expired.
*
* This function tests if a timer has expired and returns true or
* false depending on its status.
*
* \param t A pointer to the timer
*
* \return Non-zero if the timer has expired, zero otherwise.
*
*/
int timer_expired( struct timer *t )
{
return( clock_time_t ) ( clock_time() - t->start ) >= ( clock_time_t ) t->interval;
}
/*---------------------------------------------------------------------------*/
/**
* The time until the timer expires
*
* This function returns the time until the timer expires.
*
* \param t A pointer to the timer
*
* \return The time until the timer expires
*
*/
clock_time_t timer_remaining( struct timer *t )
{
return t->start + t->interval - clock_time();
}
/*---------------------------------------------------------------------------*/
/** @} */

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/**
* \addtogroup uip
* @{
*/
/**
* \defgroup uiparp uIP Address Resolution Protocol
* @{
*
* The Address Resolution Protocol ARP is used for mapping between IP
* addresses and link level addresses such as the Ethernet MAC
* addresses. ARP uses broadcast queries to ask for the link level
* address of a known IP address and the host which is configured with
* the IP address for which the query was meant, will respond with its
* link level address.
*
* \note This ARP implementation only supports Ethernet.
*/
/**
* \file
* Implementation of the ARP Address Resolution Protocol.
* \author Adam Dunkels <adam@dunkels.com>
*
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip_arp.c,v 1.5 2008/02/07 01:35:00 adamdunkels Exp $
*
*/
#include "net/uip_arp.h"
#include <string.h>
#include "net/pack_struct_start.h"
struct arp_hdr
{
struct uip_eth_hdr ethhdr;
u16_t hwtype;
u16_t protocol;
u8_t hwlen;
u8_t protolen;
u16_t opcode;
struct uip_eth_addr shwaddr;
uip_ipaddr_t sipaddr;
struct uip_eth_addr dhwaddr;
uip_ipaddr_t dipaddr;
}
#include "net/pack_struct_end.h"
#include "net/pack_struct_start.h"
struct ethip_hdr
{
struct uip_eth_hdr ethhdr;
/* IP header. */
u8_t vhl, tos, len[2], ipid[2], ipoffset[2], ttl, proto;
u16_t ipchksum;
uip_ipaddr_t srcipaddr, destipaddr;
}
#include "net/pack_struct_end.h"
#define ARP_REQUEST 1
#define ARP_REPLY 2
#define ARP_HWTYPE_ETH 1
struct arp_entry
{
uip_ipaddr_t ipaddr;
struct uip_eth_addr ethaddr;
u8_t time;
};
static const struct uip_eth_addr broadcast_ethaddr = { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
static struct arp_entry arp_table[UIP_ARPTAB_SIZE];
static uip_ipaddr_t ipaddr;
static u8_t i, c;
static u8_t arptime;
static u8_t tmpage;
#define BUF ( ( struct arp_hdr * ) &uip_buf[0] )
#define IPBUF ( ( struct ethip_hdr * ) &uip_buf[0] )
#ifdef DEBUG
#undef DEBUG
#endif
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF( ... ) printf( __VA_ARGS__ )
#else
//#define PRINTF( ... )
#endif
/*-----------------------------------------------------------------------------------*/
/**
* Initialize the ARP module.
*
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_init( void )
{
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
memset( &arp_table[i].ipaddr, 0, 4 );
}
}
/*-----------------------------------------------------------------------------------*/
/**
* Periodic ARP processing function.
*
* This function performs periodic timer processing in the ARP module
* and should be called at regular intervals. The recommended interval
* is 10 seconds between the calls.
*
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_timer( void )
{
struct arp_entry *tabptr;
++arptime;
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( uip_ipaddr_cmp(&tabptr->ipaddr, &uip_all_zeroes_addr) && arptime - tabptr->time >= UIP_ARP_MAXAGE )
{
memset( &tabptr->ipaddr, 0, 4 );
}
}
}
/*-----------------------------------------------------------------------------------*/
static void uip_arp_update( uip_ipaddr_t *ipaddr, struct uip_eth_addr *ethaddr )
{
register struct arp_entry *tabptr;
/* Walk through the ARP mapping table and try to find an entry to
update. If none is found, the IP -> MAC address mapping is
inserted in the ARP table. */
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
/* Only check those entries that are actually in use. */
if( !uip_ipaddr_cmp(&tabptr->ipaddr, &uip_all_zeroes_addr) )
{
/* Check if the source IP address of the incoming packet matches
the IP address in this ARP table entry. */
if( uip_ipaddr_cmp(ipaddr, &tabptr->ipaddr) )
{
/* An old entry found, update this and return. */
memcpy( tabptr->ethaddr.addr, ethaddr->addr, 6 );
tabptr->time = arptime;
return;
}
}
}
/* If we get here, no existing ARP table entry was found, so we
create one. */
/* First, we try to find an unused entry in the ARP table. */
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( uip_ipaddr_cmp(&tabptr->ipaddr, &uip_all_zeroes_addr) )
{
break;
}
}
/* If no unused entry is found, we try to find the oldest entry and
throw it away. */
if( i == UIP_ARPTAB_SIZE )
{
tmpage = 0;
c = 0;
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( arptime - tabptr->time > tmpage )
{
tmpage = arptime - tabptr->time;
c = i;
}
}
i = c;
tabptr = &arp_table[i];
}
/* Now, i is the ARP table entry which we will fill with the new
information. */
uip_ipaddr_copy( &tabptr->ipaddr, ipaddr );
memcpy( tabptr->ethaddr.addr, ethaddr->addr, 6 );
tabptr->time = arptime;
}
/*-----------------------------------------------------------------------------------*/
/**
* ARP processing for incoming IP packets
*
* This function should be called by the device driver when an IP
* packet has been received. The function will check if the address is
* in the ARP cache, and if so the ARP cache entry will be
* refreshed. If no ARP cache entry was found, a new one is created.
*
* This function expects an IP packet with a prepended Ethernet header
* in the uip_buf[] buffer, and the length of the packet in the global
* variable uip_len.
*/
/*-----------------------------------------------------------------------------------*/
#if 0
void uip_arp_ipin( void )
{
uip_len -= sizeof( struct uip_eth_hdr );
/* Only insert/update an entry if the source IP address of the
incoming IP packet comes from a host on the local network. */
if( (IPBUF->srcipaddr[0] & uip_netmask[0]) != (uip_hostaddr[0] & uip_netmask[0]) )
{
return;
}
if( (IPBUF->srcipaddr[1] & uip_netmask[1]) != (uip_hostaddr[1] & uip_netmask[1]) )
{
return;
}
uip_arp_update( IPBUF->srcipaddr, &(IPBUF->ethhdr.src) );
return;
}
#endif /* 0 */
/*-----------------------------------------------------------------------------------*/
/**
* ARP processing for incoming ARP packets.
*
* This function should be called by the device driver when an ARP
* packet has been received. The function will act differently
* depending on the ARP packet type: if it is a reply for a request
* that we previously sent out, the ARP cache will be filled in with
* the values from the ARP reply. If the incoming ARP packet is an ARP
* request for our IP address, an ARP reply packet is created and put
* into the uip_buf[] buffer.
*
* When the function returns, the value of the global variable uip_len
* indicates whether the device driver should send out a packet or
* not. If uip_len is zero, no packet should be sent. If uip_len is
* non-zero, it contains the length of the outbound packet that is
* present in the uip_buf[] buffer.
*
* This function expects an ARP packet with a prepended Ethernet
* header in the uip_buf[] buffer, and the length of the packet in the
* global variable uip_len.
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_arpin( void )
{
if( uip_len < sizeof(struct arp_hdr) )
{
uip_len = 0;
return;
}
uip_len = 0;
switch( BUF->opcode )
{
case HTONS( ARP_REQUEST ):
/* ARP request. If it asked for our address, we send out a
reply. */
/* if(BUF->dipaddr[0] == uip_hostaddr[0] &&
BUF->dipaddr[1] == uip_hostaddr[1]) {*/
//PRINTF( "uip_arp_arpin: request for %d.%d.%d.%d (we are %d.%d.%d.%d)\n", BUF->dipaddr.u8[0], BUF->dipaddr.u8[1], BUF->dipaddr.u8[2],
//BUF->dipaddr.u8[3], uip_hostaddr.u8[0], uip_hostaddr.u8[1], uip_hostaddr.u8[2], uip_hostaddr.u8[3] );
if( uip_ipaddr_cmp(&BUF->dipaddr, &uip_hostaddr) )
{
/* First, we register the one who made the request in our ARP
table, since it is likely that we will do more communication
with this host in the future. */
uip_arp_update( &BUF->sipaddr, &BUF->shwaddr );
BUF->opcode = HTONS( ARP_REPLY );
memcpy( BUF->dhwaddr.addr, BUF->shwaddr.addr, 6 );
memcpy( BUF->shwaddr.addr, uip_ethaddr.addr, 6 );
memcpy( BUF->ethhdr.src.addr, uip_ethaddr.addr, 6 );
memcpy( BUF->ethhdr.dest.addr, BUF->dhwaddr.addr, 6 );
uip_ipaddr_copy( &BUF->dipaddr, &BUF->sipaddr );
uip_ipaddr_copy( &BUF->sipaddr, &uip_hostaddr );
BUF->ethhdr.type = HTONS( UIP_ETHTYPE_ARP );
uip_len = sizeof( struct arp_hdr );
}
break;
case HTONS( ARP_REPLY ):
/* ARP reply. We insert or update the ARP table if it was meant
for us. */
if( uip_ipaddr_cmp(&BUF->dipaddr, &uip_hostaddr) )
{
uip_arp_update( &BUF->sipaddr, &BUF->shwaddr );
}
break;
}
return;
}
/*-----------------------------------------------------------------------------------*/
/**
* Prepend Ethernet header to an outbound IP packet and see if we need
* to send out an ARP request.
*
* This function should be called before sending out an IP packet. The
* function checks the destination IP address of the IP packet to see
* what Ethernet MAC address that should be used as a destination MAC
* address on the Ethernet.
*
* If the destination IP address is in the local network (determined
* by logical ANDing of netmask and our IP address), the function
* checks the ARP cache to see if an entry for the destination IP
* address is found. If so, an Ethernet header is prepended and the
* function returns. If no ARP cache entry is found for the
* destination IP address, the packet in the uip_buf[] is replaced by
* an ARP request packet for the IP address. The IP packet is dropped
* and it is assumed that they higher level protocols (e.g., TCP)
* eventually will retransmit the dropped packet.
*
* If the destination IP address is not on the local network, the IP
* address of the default router is used instead.
*
* When the function returns, a packet is present in the uip_buf[]
* buffer, and the length of the packet is in the global variable
* uip_len.
*/
/*-----------------------------------------------------------------------------------*/
void uip_arp_out( void )
{
struct arp_entry *tabptr;
/* Find the destination IP address in the ARP table and construct
the Ethernet header. If the destination IP addres isn't on the
local network, we use the default router's IP address instead.
If not ARP table entry is found, we overwrite the original IP
packet with an ARP request for the IP address. */
/* First check if destination is a local broadcast. */
if( uip_ipaddr_cmp(&IPBUF->destipaddr, &uip_broadcast_addr) )
{
memcpy( IPBUF->ethhdr.dest.addr, broadcast_ethaddr.addr, 6 );
}
else
{
/* Check if the destination address is on the local network. */
if( !uip_ipaddr_maskcmp(&IPBUF->destipaddr, &uip_hostaddr, &uip_netmask) )
{
/* Destination address was not on the local network, so we need to
use the default router's IP address instead of the destination
address when determining the MAC address. */
uip_ipaddr_copy( &ipaddr, &uip_draddr );
}
else
{
/* Else, we use the destination IP address. */
uip_ipaddr_copy( &ipaddr, &IPBUF->destipaddr );
}
for( i = 0; i < UIP_ARPTAB_SIZE; ++i )
{
tabptr = &arp_table[i];
if( uip_ipaddr_cmp(&ipaddr, &tabptr->ipaddr) )
{
break;
}
}
if( i == UIP_ARPTAB_SIZE )
{
/* The destination address was not in our ARP table, so we
overwrite the IP packet with an ARP request. */
memset( BUF->ethhdr.dest.addr, 0xff, 6 );
memset( BUF->dhwaddr.addr, 0x00, 6 );
memcpy( BUF->ethhdr.src.addr, uip_ethaddr.addr, 6 );
memcpy( BUF->shwaddr.addr, uip_ethaddr.addr, 6 );
uip_ipaddr_copy( &BUF->dipaddr, &ipaddr );
uip_ipaddr_copy( &BUF->sipaddr, &uip_hostaddr );
BUF->opcode = HTONS( ARP_REQUEST ); /* ARP request. */
BUF->hwtype = HTONS( ARP_HWTYPE_ETH );
BUF->protocol = HTONS( UIP_ETHTYPE_IP );
BUF->hwlen = 6;
BUF->protolen = 4;
BUF->ethhdr.type = HTONS( UIP_ETHTYPE_ARP );
uip_appdata = &uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN];
uip_len = sizeof( struct arp_hdr );
return;
}
/* Build an ethernet header. */
memcpy( IPBUF->ethhdr.dest.addr, tabptr->ethaddr.addr, 6 );
}
memcpy( IPBUF->ethhdr.src.addr, uip_ethaddr.addr, 6 );
IPBUF->ethhdr.type = HTONS( UIP_ETHTYPE_IP );
uip_len += sizeof( struct uip_eth_hdr );
}
/*-----------------------------------------------------------------------------------*/
/** @} */
/** @} */

6
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@ -0,0 +1,6 @@
[InternetShortcut]
URL=http://www.freertos.org/tcp
IDList=
HotKey=0
[{000214A0-0000-0000-C000-000000000046}]
Prop3=19,2

13
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api/ - The code for the high-level wrapper API. Not needed if
you use the lowel-level call-back/raw API.
core/ - The core of the TPC/IP stack; protocol implementations,
memory and buffer management, and the low-level raw API.
include/ - lwIP include files.
netif/ - Generic network interface device drivers are kept here,
as well as the ARP module.
For more information on the various subdirectories, check the FILES
file in each directory.

722
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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/* This is the part of the API that is linked with
the application */
#include "lwip/opt.h"
#include "lwip/api.h"
#include "lwip/api_msg.h"
#include "lwip/memp.h"
struct
netbuf *netbuf_new(void)
{
struct netbuf *buf;
buf = memp_malloc(MEMP_NETBUF);
if (buf != NULL) {
buf->p = NULL;
buf->ptr = NULL;
return buf;
} else {
return NULL;
}
}
void
netbuf_delete(struct netbuf *buf)
{
if (buf != NULL) {
if (buf->p != NULL) {
pbuf_free(buf->p);
buf->p = buf->ptr = NULL;
}
memp_free(MEMP_NETBUF, buf);
}
}
void *
netbuf_alloc(struct netbuf *buf, u16_t size)
{
/* Deallocate any previously allocated memory. */
if (buf->p != NULL) {
pbuf_free(buf->p);
}
buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
if (buf->p == NULL) {
return NULL;
}
buf->ptr = buf->p;
return buf->p->payload;
}
void
netbuf_free(struct netbuf *buf)
{
if (buf->p != NULL) {
pbuf_free(buf->p);
}
buf->p = buf->ptr = NULL;
}
void
netbuf_ref(struct netbuf *buf, void *dataptr, u16_t size)
{
if (buf->p != NULL) {
pbuf_free(buf->p);
}
buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
buf->p->payload = dataptr;
buf->p->len = buf->p->tot_len = size;
buf->ptr = buf->p;
}
void
netbuf_chain(struct netbuf *head, struct netbuf *tail)
{
pbuf_chain(head->p, tail->p);
head->ptr = head->p;
memp_free(MEMP_NETBUF, tail);
}
u16_t
netbuf_len(struct netbuf *buf)
{
return buf->p->tot_len;
}
err_t
netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
{
if (buf->ptr == NULL) {
return ERR_BUF;
}
*dataptr = buf->ptr->payload;
*len = buf->ptr->len;
return ERR_OK;
}
s8_t
netbuf_next(struct netbuf *buf)
{
if (buf->ptr->next == NULL) {
return -1;
}
buf->ptr = buf->ptr->next;
if (buf->ptr->next == NULL) {
return 1;
}
return 0;
}
void
netbuf_first(struct netbuf *buf)
{
buf->ptr = buf->p;
}
void
netbuf_copy_partial(struct netbuf *buf, void *dataptr, u16_t len, u16_t offset)
{
struct pbuf *p;
u16_t i, left;
left = 0;
if(buf == NULL || dataptr == NULL) {
return;
}
/* This implementation is bad. It should use bcopy
instead. */
for(p = buf->p; left < len && p != NULL; p = p->next) {
if (offset != 0 && offset >= p->len) {
offset -= p->len;
} else {
for(i = offset; i < p->len; ++i) {
((u8_t *)dataptr)[left] = ((u8_t *)p->payload)[i];
if (++left >= len) {
return;
}
}
offset = 0;
}
}
}
void
netbuf_copy(struct netbuf *buf, void *dataptr, u16_t len)
{
netbuf_copy_partial(buf, dataptr, len, 0);
}
struct ip_addr *
netbuf_fromaddr(struct netbuf *buf)
{
return buf->fromaddr;
}
u16_t
netbuf_fromport(struct netbuf *buf)
{
return buf->fromport;
}
struct
netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u16_t proto,
void (*callback)(struct netconn *, enum netconn_evt, u16_t len))
{
struct netconn *conn;
struct api_msg *msg;
conn = memp_malloc(MEMP_NETCONN);
if (conn == NULL) {
return NULL;
}
conn->err = ERR_OK;
conn->type = t;
conn->pcb.tcp = NULL;
if ((conn->mbox = sys_mbox_new()) == SYS_MBOX_NULL) {
memp_free(MEMP_NETCONN, conn);
return NULL;
}
conn->recvmbox = SYS_MBOX_NULL;
conn->acceptmbox = SYS_MBOX_NULL;
conn->sem = sys_sem_new(0);
if (conn->sem == SYS_SEM_NULL) {
memp_free(MEMP_NETCONN, conn);
return NULL;
}
conn->state = NETCONN_NONE;
conn->socket = 0;
conn->callback = callback;
conn->recv_avail = 0;
if((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
memp_free(MEMP_NETCONN, conn);
return NULL;
}
msg->type = API_MSG_NEWCONN;
msg->msg.msg.bc.port = proto; /* misusing the port field */
msg->msg.conn = conn;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
if ( conn->err != ERR_OK ) {
memp_free(MEMP_NETCONN, conn);
return NULL;
}
return conn;
}
struct
netconn *netconn_new(enum netconn_type t)
{
return netconn_new_with_proto_and_callback(t,0,NULL);
}
struct
netconn *netconn_new_with_callback(enum netconn_type t,
void (*callback)(struct netconn *, enum netconn_evt, u16_t len))
{
return netconn_new_with_proto_and_callback(t,0,callback);
}
err_t
netconn_delete(struct netconn *conn)
{
struct api_msg *msg;
void *mem;
if (conn == NULL) {
return ERR_OK;
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return ERR_MEM;
}
msg->type = API_MSG_DELCONN;
msg->msg.conn = conn;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
/* Drain the recvmbox. */
if (conn->recvmbox != SYS_MBOX_NULL) {
while (sys_arch_mbox_fetch(conn->recvmbox, &mem, 1) != SYS_ARCH_TIMEOUT) {
if (conn->type == NETCONN_TCP) {
if(mem != NULL)
pbuf_free((struct pbuf *)mem);
} else {
netbuf_delete((struct netbuf *)mem);
}
}
sys_mbox_free(conn->recvmbox);
conn->recvmbox = SYS_MBOX_NULL;
}
/* Drain the acceptmbox. */
if (conn->acceptmbox != SYS_MBOX_NULL) {
while (sys_arch_mbox_fetch(conn->acceptmbox, &mem, 1) != SYS_ARCH_TIMEOUT) {
netconn_delete((struct netconn *)mem);
}
sys_mbox_free(conn->acceptmbox);
conn->acceptmbox = SYS_MBOX_NULL;
}
sys_mbox_free(conn->mbox);
conn->mbox = SYS_MBOX_NULL;
if (conn->sem != SYS_SEM_NULL) {
sys_sem_free(conn->sem);
}
/* conn->sem = SYS_SEM_NULL;*/
memp_free(MEMP_NETCONN, conn);
return ERR_OK;
}
enum netconn_type
netconn_type(struct netconn *conn)
{
return conn->type;
}
err_t
netconn_peer(struct netconn *conn, struct ip_addr *addr,
u16_t *port)
{
switch (conn->type) {
case NETCONN_RAW:
/* return an error as connecting is only a helper for upper layers */
return ERR_CONN;
case NETCONN_UDPLITE:
case NETCONN_UDPNOCHKSUM:
case NETCONN_UDP:
if (conn->pcb.udp == NULL ||
((conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0))
return ERR_CONN;
*addr = (conn->pcb.udp->remote_ip);
*port = conn->pcb.udp->remote_port;
break;
case NETCONN_TCP:
if (conn->pcb.tcp == NULL)
return ERR_CONN;
*addr = (conn->pcb.tcp->remote_ip);
*port = conn->pcb.tcp->remote_port;
break;
}
return (conn->err = ERR_OK);
}
err_t
netconn_addr(struct netconn *conn, struct ip_addr **addr,
u16_t *port)
{
switch (conn->type) {
case NETCONN_RAW:
*addr = &(conn->pcb.raw->local_ip);
*port = conn->pcb.raw->protocol;
break;
case NETCONN_UDPLITE:
case NETCONN_UDPNOCHKSUM:
case NETCONN_UDP:
*addr = &(conn->pcb.udp->local_ip);
*port = conn->pcb.udp->local_port;
break;
case NETCONN_TCP:
*addr = &(conn->pcb.tcp->local_ip);
*port = conn->pcb.tcp->local_port;
break;
}
return (conn->err = ERR_OK);
}
err_t
netconn_bind(struct netconn *conn, struct ip_addr *addr,
u16_t port)
{
struct api_msg *msg;
if (conn == NULL) {
return ERR_VAL;
}
if (conn->type != NETCONN_TCP &&
conn->recvmbox == SYS_MBOX_NULL) {
if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) {
return ERR_MEM;
}
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return (conn->err = ERR_MEM);
}
msg->type = API_MSG_BIND;
msg->msg.conn = conn;
msg->msg.msg.bc.ipaddr = addr;
msg->msg.msg.bc.port = port;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
return conn->err;
}
err_t
netconn_connect(struct netconn *conn, struct ip_addr *addr,
u16_t port)
{
struct api_msg *msg;
if (conn == NULL) {
return ERR_VAL;
}
if (conn->recvmbox == SYS_MBOX_NULL) {
if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) {
return ERR_MEM;
}
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return ERR_MEM;
}
msg->type = API_MSG_CONNECT;
msg->msg.conn = conn;
msg->msg.msg.bc.ipaddr = addr;
msg->msg.msg.bc.port = port;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
return conn->err;
}
err_t
netconn_disconnect(struct netconn *conn)
{
struct api_msg *msg;
if (conn == NULL) {
return ERR_VAL;
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return ERR_MEM;
}
msg->type = API_MSG_DISCONNECT;
msg->msg.conn = conn;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
return conn->err;
}
err_t
netconn_listen(struct netconn *conn)
{
struct api_msg *msg;
if (conn == NULL) {
return ERR_VAL;
}
if (conn->acceptmbox == SYS_MBOX_NULL) {
conn->acceptmbox = sys_mbox_new();
if (conn->acceptmbox == SYS_MBOX_NULL) {
return ERR_MEM;
}
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return (conn->err = ERR_MEM);
}
msg->type = API_MSG_LISTEN;
msg->msg.conn = conn;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
return conn->err;
}
struct netconn *
netconn_accept(struct netconn *conn)
{
struct netconn *newconn;
if (conn == NULL) {
return NULL;
}
sys_mbox_fetch(conn->acceptmbox, (void *)&newconn);
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVMINUS, 0);
return newconn;
}
struct netbuf *
netconn_recv(struct netconn *conn)
{
struct api_msg *msg;
struct netbuf *buf;
struct pbuf *p;
u16_t len;
if (conn == NULL) {
return NULL;
}
if (conn->recvmbox == SYS_MBOX_NULL) {
conn->err = ERR_CONN;
return NULL;
}
if (conn->err != ERR_OK) {
return NULL;
}
if (conn->type == NETCONN_TCP) {
if (conn->pcb.tcp->state == LISTEN) {
conn->err = ERR_CONN;
return NULL;
}
buf = memp_malloc(MEMP_NETBUF);
if (buf == NULL) {
conn->err = ERR_MEM;
return NULL;
}
sys_mbox_fetch(conn->recvmbox, (void *)&p);
if (p != NULL)
{
len = p->tot_len;
conn->recv_avail -= len;
}
else
len = 0;
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVMINUS, len);
/* If we are closed, we indicate that we no longer wish to receive
data by setting conn->recvmbox to SYS_MBOX_NULL. */
if (p == NULL) {
memp_free(MEMP_NETBUF, buf);
sys_mbox_free(conn->recvmbox);
conn->recvmbox = SYS_MBOX_NULL;
return NULL;
}
buf->p = p;
buf->ptr = p;
buf->fromport = 0;
buf->fromaddr = NULL;
/* Let the stack know that we have taken the data. */
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
conn->err = ERR_MEM;
return buf;
}
msg->type = API_MSG_RECV;
msg->msg.conn = conn;
if (buf != NULL) {
msg->msg.msg.len = buf->p->tot_len;
} else {
msg->msg.msg.len = 1;
}
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
} else {
sys_mbox_fetch(conn->recvmbox, (void *)&buf);
conn->recv_avail -= buf->p->tot_len;
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVMINUS, buf->p->tot_len);
}
LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv: received %p (err %d)\n", (void *)buf, conn->err));
return buf;
}
err_t
netconn_send(struct netconn *conn, struct netbuf *buf)
{
struct api_msg *msg;
if (conn == NULL) {
return ERR_VAL;
}
if (conn->err != ERR_OK) {
return conn->err;
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return (conn->err = ERR_MEM);
}
LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %d bytes\n", buf->p->tot_len));
msg->type = API_MSG_SEND;
msg->msg.conn = conn;
msg->msg.msg.p = buf->p;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
memp_free(MEMP_API_MSG, msg);
return conn->err;
}
err_t
netconn_write(struct netconn *conn, void *dataptr, u16_t size, u8_t copy)
{
struct api_msg *msg;
u16_t len;
if (conn == NULL) {
return ERR_VAL;
}
if (conn->err != ERR_OK) {
return conn->err;
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return (conn->err = ERR_MEM);
}
msg->type = API_MSG_WRITE;
msg->msg.conn = conn;
conn->state = NETCONN_WRITE;
while (conn->err == ERR_OK && size > 0) {
msg->msg.msg.w.dataptr = dataptr;
msg->msg.msg.w.copy = copy;
if (conn->type == NETCONN_TCP) {
if (tcp_sndbuf(conn->pcb.tcp) == 0) {
sys_sem_wait(conn->sem);
if (conn->err != ERR_OK) {
goto ret;
}
}
if (size > tcp_sndbuf(conn->pcb.tcp)) {
/* We cannot send more than one send buffer's worth of data at a
time. */
len = tcp_sndbuf(conn->pcb.tcp);
} else {
len = size;
}
} else {
len = size;
}
LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_write: writing %d bytes (%d)\n", len, copy));
msg->msg.msg.w.len = len;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
if (conn->err == ERR_OK) {
dataptr = (void *)((u8_t *)dataptr + len);
size -= len;
} else if (conn->err == ERR_MEM) {
conn->err = ERR_OK;
sys_sem_wait(conn->sem);
} else {
goto ret;
}
}
ret:
memp_free(MEMP_API_MSG, msg);
conn->state = NETCONN_NONE;
return conn->err;
}
err_t
netconn_close(struct netconn *conn)
{
struct api_msg *msg;
if (conn == NULL) {
return ERR_VAL;
}
if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
return (conn->err = ERR_MEM);
}
conn->state = NETCONN_CLOSE;
again:
msg->type = API_MSG_CLOSE;
msg->msg.conn = conn;
api_msg_post(msg);
sys_mbox_fetch(conn->mbox, NULL);
if (conn->err == ERR_MEM &&
conn->sem != SYS_SEM_NULL) {
sys_sem_wait(conn->sem);
goto again;
}
conn->state = NETCONN_NONE;
memp_free(MEMP_API_MSG, msg);
return conn->err;
}
err_t
netconn_err(struct netconn *conn)
{
return conn->err;
}

807
FreeRTOSv10.2.1/FreeRTOS/Demo/Common/ethernet/lwIP/api/api_msg.c Normal file
View File

@ -0,0 +1,807 @@
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/arch.h"
#include "lwip/api_msg.h"
#include "lwip/memp.h"
#include "lwip/sys.h"
#include "lwip/tcpip.h"
#if LWIP_RAW
static u8_t
recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
struct ip_addr *addr)
{
struct netbuf *buf;
struct netconn *conn;
conn = arg;
if (!conn) return 0;
if (conn->recvmbox != SYS_MBOX_NULL) {
if (!(buf = memp_malloc(MEMP_NETBUF))) {
return 0;
}
pbuf_ref(p);
buf->p = p;
buf->ptr = p;
buf->fromaddr = addr;
buf->fromport = pcb->protocol;
conn->recv_avail += p->tot_len;
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, p->tot_len);
sys_mbox_post(conn->recvmbox, buf);
}
return 0; /* do not eat the packet */
}
#endif
#if LWIP_UDP
static void
recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
struct ip_addr *addr, u16_t port)
{
struct netbuf *buf;
struct netconn *conn;
conn = arg;
if (conn == NULL) {
pbuf_free(p);
return;
}
if (conn->recvmbox != SYS_MBOX_NULL) {
buf = memp_malloc(MEMP_NETBUF);
if (buf == NULL) {
pbuf_free(p);
return;
} else {
buf->p = p;
buf->ptr = p;
buf->fromaddr = addr;
buf->fromport = port;
}
conn->recv_avail += p->tot_len;
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, p->tot_len);
sys_mbox_post(conn->recvmbox, buf);
}
}
#endif /* LWIP_UDP */
#if LWIP_TCP
static err_t
recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
{
struct netconn *conn;
u16_t len;
conn = arg;
if (conn == NULL) {
pbuf_free(p);
return ERR_VAL;
}
if (conn->recvmbox != SYS_MBOX_NULL) {
conn->err = err;
if (p != NULL) {
len = p->tot_len;
conn->recv_avail += len;
}
else
len = 0;
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, len);
sys_mbox_post(conn->recvmbox, p);
}
return ERR_OK;
}
static err_t
poll_tcp(void *arg, struct tcp_pcb *pcb)
{
struct netconn *conn;
conn = arg;
if (conn != NULL &&
(conn->state == NETCONN_WRITE || conn->state == NETCONN_CLOSE) &&
conn->sem != SYS_SEM_NULL) {
sys_sem_signal(conn->sem);
}
return ERR_OK;
}
static err_t
sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
{
struct netconn *conn;
conn = arg;
if (conn != NULL && conn->sem != SYS_SEM_NULL) {
sys_sem_signal(conn->sem);
}
if (conn && conn->callback)
if (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT)
(*conn->callback)(conn, NETCONN_EVT_SENDPLUS, len);
return ERR_OK;
}
static void
err_tcp(void *arg, err_t err)
{
struct netconn *conn;
conn = arg;
conn->pcb.tcp = NULL;
conn->err = err;
if (conn->recvmbox != SYS_MBOX_NULL) {
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0);
sys_mbox_post(conn->recvmbox, NULL);
}
if (conn->mbox != SYS_MBOX_NULL) {
sys_mbox_post(conn->mbox, NULL);
}
if (conn->acceptmbox != SYS_MBOX_NULL) {
/* Register event with callback */
if (conn->callback)
(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0);
sys_mbox_post(conn->acceptmbox, NULL);
}
if (conn->sem != SYS_SEM_NULL) {
sys_sem_signal(conn->sem);
}
}
static void
setup_tcp(struct netconn *conn)
{
struct tcp_pcb *pcb;
pcb = conn->pcb.tcp;
tcp_arg(pcb, conn);
tcp_recv(pcb, recv_tcp);
tcp_sent(pcb, sent_tcp);
tcp_poll(pcb, poll_tcp, 4);
tcp_err(pcb, err_tcp);
}
static err_t
accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
{
sys_mbox_t mbox;
struct netconn *newconn;
struct netconn *conn;
#if API_MSG_DEBUG
#if TCP_DEBUG
tcp_debug_print_state(newpcb->state);
#endif /* TCP_DEBUG */
#endif /* API_MSG_DEBUG */
conn = (struct netconn *)arg;
mbox = conn->acceptmbox;
newconn = memp_malloc(MEMP_NETCONN);
if (newconn == NULL) {
return ERR_MEM;
}
newconn->recvmbox = sys_mbox_new();
if (newconn->recvmbox == SYS_MBOX_NULL) {
memp_free(MEMP_NETCONN, newconn);
return ERR_MEM;
}
newconn->mbox = sys_mbox_new();
if (newconn->mbox == SYS_MBOX_NULL) {
sys_mbox_free(newconn->recvmbox);
memp_free(MEMP_NETCONN, newconn);
return ERR_MEM;
}
newconn->sem = sys_sem_new(0);
if (newconn->sem == SYS_SEM_NULL) {
sys_mbox_free(newconn->recvmbox);
sys_mbox_free(newconn->mbox);
memp_free(MEMP_NETCONN, newconn);
return ERR_MEM;
}
/* Allocations were OK, setup the PCB etc */
newconn->type = NETCONN_TCP;
newconn->pcb.tcp = newpcb;
setup_tcp(newconn);
newconn->acceptmbox = SYS_MBOX_NULL;
newconn->err = err;
/* Register event with callback */
if (conn->callback)
{
(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0);
}
/* We have to set the callback here even though
* the new socket is unknown. Mark the socket as -1. */
newconn->callback = conn->callback;
newconn->socket = -1;
newconn->recv_avail = 0;
sys_mbox_post(mbox, newconn);
return ERR_OK;
}
#endif /* LWIP_TCP */
static void
do_newconn(struct api_msg_msg *msg)
{
if(msg->conn->pcb.tcp != NULL) {
/* This "new" connection already has a PCB allocated. */
/* Is this an error condition? Should it be deleted?
We currently just are happy and return. */
sys_mbox_post(msg->conn->mbox, NULL);
return;
}
msg->conn->err = ERR_OK;
/* Allocate a PCB for this connection */
switch(msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field */
raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
msg->conn->pcb.udp = udp_new();
if(msg->conn->pcb.udp == NULL) {
msg->conn->err = ERR_MEM;
break;
}
udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
case NETCONN_UDPNOCHKSUM:
msg->conn->pcb.udp = udp_new();
if(msg->conn->pcb.udp == NULL) {
msg->conn->err = ERR_MEM;
break;
}
udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
case NETCONN_UDP:
msg->conn->pcb.udp = udp_new();
if(msg->conn->pcb.udp == NULL) {
msg->conn->err = ERR_MEM;
break;
}
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
msg->conn->pcb.tcp = tcp_new();
if(msg->conn->pcb.tcp == NULL) {
msg->conn->err = ERR_MEM;
break;
}
setup_tcp(msg->conn);
break;
#endif
}
sys_mbox_post(msg->conn->mbox, NULL);
}
static void
do_delconn(struct api_msg_msg *msg)
{
if (msg->conn->pcb.tcp != NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
raw_remove(msg->conn->pcb.raw);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
msg->conn->pcb.udp->recv_arg = NULL;
udp_remove(msg->conn->pcb.udp);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
if (msg->conn->pcb.tcp->state == LISTEN) {
tcp_arg(msg->conn->pcb.tcp, NULL);
tcp_accept(msg->conn->pcb.tcp, NULL);
tcp_close(msg->conn->pcb.tcp);
} else {
tcp_arg(msg->conn->pcb.tcp, NULL);
tcp_sent(msg->conn->pcb.tcp, NULL);
tcp_recv(msg->conn->pcb.tcp, NULL);
tcp_poll(msg->conn->pcb.tcp, NULL, 0);
tcp_err(msg->conn->pcb.tcp, NULL);
if (tcp_close(msg->conn->pcb.tcp) != ERR_OK) {
tcp_abort(msg->conn->pcb.tcp);
}
}
#endif
default:
break;
}
}
/* Trigger select() in socket layer */
if (msg->conn->callback)
{
(*msg->conn->callback)(msg->conn, NETCONN_EVT_RCVPLUS, 0);
(*msg->conn->callback)(msg->conn, NETCONN_EVT_SENDPLUS, 0);
}
if (msg->conn->mbox != SYS_MBOX_NULL) {
sys_mbox_post(msg->conn->mbox, NULL);
}
}
static void
do_bind(struct api_msg_msg *msg)
{
if (msg->conn->pcb.tcp == NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field as protocol */
raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
msg->conn->pcb.udp = udp_new();
udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
case NETCONN_UDPNOCHKSUM:
msg->conn->pcb.udp = udp_new();
udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
case NETCONN_UDP:
msg->conn->pcb.udp = udp_new();
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
msg->conn->pcb.tcp = tcp_new();
setup_tcp(msg->conn);
#endif /* LWIP_TCP */
default:
break;
}
}
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
msg->conn->err = raw_bind(msg->conn->pcb.raw,msg->msg.bc.ipaddr);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
msg->conn->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
msg->conn->err = tcp_bind(msg->conn->pcb.tcp,
msg->msg.bc.ipaddr, msg->msg.bc.port);
#endif /* LWIP_TCP */
default:
break;
}
sys_mbox_post(msg->conn->mbox, NULL);
}
#if LWIP_TCP
static err_t
do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
{
struct netconn *conn;
conn = arg;
if (conn == NULL) {
return ERR_VAL;
}
conn->err = err;
if (conn->type == NETCONN_TCP && err == ERR_OK) {
setup_tcp(conn);
}
sys_mbox_post(conn->mbox, NULL);
return ERR_OK;
}
#endif
static void
do_connect(struct api_msg_msg *msg)
{
if (msg->conn->pcb.tcp == NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field as protocol */
raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
msg->conn->pcb.udp = udp_new();
if (msg->conn->pcb.udp == NULL) {
msg->conn->err = ERR_MEM;
sys_mbox_post(msg->conn->mbox, NULL);
return;
}
udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
case NETCONN_UDPNOCHKSUM:
msg->conn->pcb.udp = udp_new();
if (msg->conn->pcb.udp == NULL) {
msg->conn->err = ERR_MEM;
sys_mbox_post(msg->conn->mbox, NULL);
return;
}
udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
case NETCONN_UDP:
msg->conn->pcb.udp = udp_new();
if (msg->conn->pcb.udp == NULL) {
msg->conn->err = ERR_MEM;
sys_mbox_post(msg->conn->mbox, NULL);
return;
}
udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
msg->conn->pcb.tcp = tcp_new();
if (msg->conn->pcb.tcp == NULL) {
msg->conn->err = ERR_MEM;
sys_mbox_post(msg->conn->mbox, NULL);
return;
}
#endif
default:
break;
}
}
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
sys_mbox_post(msg->conn->mbox, NULL);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
sys_mbox_post(msg->conn->mbox, NULL);
break;
#endif
#if LWIP_TCP
case NETCONN_TCP:
/* tcp_arg(msg->conn->pcb.tcp, msg->conn);*/
setup_tcp(msg->conn);
tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port,
do_connected);
/*tcp_output(msg->conn->pcb.tcp);*/
#endif
default:
break;
}
}
static void
do_disconnect(struct api_msg_msg *msg)
{
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
/* Do nothing as connecting is only a helper for upper lwip layers */
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
udp_disconnect(msg->conn->pcb.udp);
break;
#endif
case NETCONN_TCP:
break;
}
sys_mbox_post(msg->conn->mbox, NULL);
}
static void
do_listen(struct api_msg_msg *msg)
{
if (msg->conn->pcb.tcp != NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: listen RAW: cannot listen for RAW.\n"));
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: listen UDP: cannot listen for UDP.\n"));
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
msg->conn->pcb.tcp = tcp_listen(msg->conn->pcb.tcp);
if (msg->conn->pcb.tcp == NULL) {
msg->conn->err = ERR_MEM;
} else {
if (msg->conn->acceptmbox == SYS_MBOX_NULL) {
msg->conn->acceptmbox = sys_mbox_new();
if (msg->conn->acceptmbox == SYS_MBOX_NULL) {
msg->conn->err = ERR_MEM;
break;
}
}
tcp_arg(msg->conn->pcb.tcp, msg->conn);
tcp_accept(msg->conn->pcb.tcp, accept_function);
}
#endif
default:
break;
}
}
sys_mbox_post(msg->conn->mbox, NULL);
}
static void
do_accept(struct api_msg_msg *msg)
{
if (msg->conn->pcb.tcp != NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: accept RAW: cannot accept for RAW.\n"));
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: accept UDP: cannot accept for UDP.\n"));
break;
#endif /* LWIP_UDP */
case NETCONN_TCP:
break;
}
}
}
static void
do_send(struct api_msg_msg *msg)
{
if (msg->conn->pcb.tcp != NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
raw_send(msg->conn->pcb.raw, msg->msg.p);
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
udp_send(msg->conn->pcb.udp, msg->msg.p);
break;
#endif /* LWIP_UDP */
case NETCONN_TCP:
break;
}
}
sys_mbox_post(msg->conn->mbox, NULL);
}
static void
do_recv(struct api_msg_msg *msg)
{
#if LWIP_TCP
if (msg->conn->pcb.tcp != NULL) {
if (msg->conn->type == NETCONN_TCP) {
tcp_recved(msg->conn->pcb.tcp, msg->msg.len);
}
}
#endif
sys_mbox_post(msg->conn->mbox, NULL);
}
static void
do_write(struct api_msg_msg *msg)
{
#if LWIP_TCP
err_t err;
#endif
if (msg->conn->pcb.tcp != NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
msg->conn->err = ERR_VAL;
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
msg->conn->err = ERR_VAL;
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
err = tcp_write(msg->conn->pcb.tcp, msg->msg.w.dataptr,
msg->msg.w.len, msg->msg.w.copy);
/* This is the Nagle algorithm: inhibit the sending of new TCP
segments when new outgoing data arrives from the user if any
previously transmitted data on the connection remains
unacknowledged. */
if(err == ERR_OK && (msg->conn->pcb.tcp->unacked == NULL ||
(msg->conn->pcb.tcp->flags & TF_NODELAY) ||
(msg->conn->pcb.tcp->snd_queuelen) > 1)) {
tcp_output(msg->conn->pcb.tcp);
}
msg->conn->err = err;
if (msg->conn->callback)
if (err == ERR_OK)
{
if (tcp_sndbuf(msg->conn->pcb.tcp) <= TCP_SNDLOWAT)
(*msg->conn->callback)(msg->conn, NETCONN_EVT_SENDMINUS, msg->msg.w.len);
}
#endif
default:
break;
}
}
sys_mbox_post(msg->conn->mbox, NULL);
}
static void
do_close(struct api_msg_msg *msg)
{
err_t err;
err = ERR_OK;
if (msg->conn->pcb.tcp != NULL) {
switch (msg->conn->type) {
#if LWIP_RAW
case NETCONN_RAW:
break;
#endif
#if LWIP_UDP
case NETCONN_UDPLITE:
/* FALLTHROUGH */
case NETCONN_UDPNOCHKSUM:
/* FALLTHROUGH */
case NETCONN_UDP:
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case NETCONN_TCP:
if (msg->conn->pcb.tcp->state == LISTEN) {
err = tcp_close(msg->conn->pcb.tcp);
}
else if (msg->conn->pcb.tcp->state == CLOSE_WAIT) {
err = tcp_output(msg->conn->pcb.tcp);
}
msg->conn->err = err;
#endif
default:
break;
}
}
sys_mbox_post(msg->conn->mbox, NULL);
}
typedef void (* api_msg_decode)(struct api_msg_msg *msg);
static api_msg_decode decode[API_MSG_MAX] = {
do_newconn,
do_delconn,
do_bind,
do_connect,
do_disconnect,
do_listen,
do_accept,
do_send,
do_recv,
do_write,
do_close
};
void
api_msg_input(struct api_msg *msg)
{
decode[msg->type](&(msg->msg));
}
void
api_msg_post(struct api_msg *msg)
{
tcpip_apimsg(msg);
}

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/err.h"
#ifdef LWIP_DEBUG
static char *err_strerr[] = {"Ok.",
"Out of memory error.",
"Buffer error.",
"Connection aborted.",
"Connection reset.",
"Connection closed.",
"Not connected.",
"Illegal value.",
"Illegal argument.",
"Routing problem.",
"Address in use."
};
char *
lwip_strerr(err_t err)
{
return err_strerr[-err];
}
#endif /* LWIP_DEBUG */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/sys.h"
#include "lwip/memp.h"
#include "lwip/pbuf.h"
#include "lwip/ip.h"
#include "lwip/ip_frag.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/tcpip.h"
static void (* tcpip_init_done)(void *arg) = NULL;
static void *tcpip_init_done_arg;
static sys_mbox_t mbox;
#if LWIP_TCP
static int tcpip_tcp_timer_active = 0;
static void
tcpip_tcp_timer(void *arg)
{
(void)arg;
/* call TCP timer handler */
tcp_tmr();
/* timer still needed? */
if (tcp_active_pcbs || tcp_tw_pcbs) {
/* restart timer */
sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
} else {
/* disable timer */
tcpip_tcp_timer_active = 0;
}
}
#if !NO_SYS
void
tcp_timer_needed(void)
{
/* timer is off but needed again? */
if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
/* enable and start timer */
tcpip_tcp_timer_active = 1;
sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
}
}
#endif /* !NO_SYS */
#endif /* LWIP_TCP */
#if IP_REASSEMBLY
static void
ip_timer(void *data)
{
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n"));
ip_reass_tmr();
sys_timeout(1000, ip_timer, NULL);
}
#endif
static void
tcpip_thread(void *arg)
{
struct tcpip_msg *msg;
(void)arg;
ip_init();
#if LWIP_UDP
udp_init();
#endif
#if LWIP_TCP
tcp_init();
#endif
#if IP_REASSEMBLY
sys_timeout(1000, ip_timer, NULL);
#endif
if (tcpip_init_done != NULL) {
tcpip_init_done(tcpip_init_done_arg);
}
while (1) { /* MAIN Loop */
sys_mbox_fetch(mbox, (void *)&msg);
switch (msg->type) {
case TCPIP_MSG_API:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
api_msg_input(msg->msg.apimsg);
break;
case TCPIP_MSG_INPUT:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: IP packet %p\n", (void *)msg));
ip_input(msg->msg.inp.p, msg->msg.inp.netif);
break;
case TCPIP_MSG_CALLBACK:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
msg->msg.cb.f(msg->msg.cb.ctx);
break;
default:
break;
}
memp_free(MEMP_TCPIP_MSG, msg);
}
}
err_t
tcpip_input(struct pbuf *p, struct netif *inp)
{
struct tcpip_msg *msg;
msg = memp_malloc(MEMP_TCPIP_MSG);
if (msg == NULL) {
pbuf_free(p);
return ERR_MEM;
}
msg->type = TCPIP_MSG_INPUT;
msg->msg.inp.p = p;
msg->msg.inp.netif = inp;
sys_mbox_post(mbox, msg);
return ERR_OK;
}
err_t
tcpip_callback(void (*f)(void *ctx), void *ctx)
{
struct tcpip_msg *msg;
msg = memp_malloc(MEMP_TCPIP_MSG);
if (msg == NULL) {
return ERR_MEM;
}
msg->type = TCPIP_MSG_CALLBACK;
msg->msg.cb.f = f;
msg->msg.cb.ctx = ctx;
sys_mbox_post(mbox, msg);
return ERR_OK;
}
void
tcpip_apimsg(struct api_msg *apimsg)
{
struct tcpip_msg *msg;
msg = memp_malloc(MEMP_TCPIP_MSG);
if (msg == NULL) {
memp_free(MEMP_API_MSG, apimsg);
return;
}
msg->type = TCPIP_MSG_API;
msg->msg.apimsg = apimsg;
sys_mbox_post(mbox, msg);
}
void
tcpip_init(void (* initfunc)(void *), void *arg)
{
tcpip_init_done = initfunc;
tcpip_init_done_arg = arg;
mbox = sys_mbox_new();
sys_thread_new(tcpip_thread, NULL, TCPIP_THREAD_PRIO);
}

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/* inet.c
*
* Functions common to all TCP/IP modules, such as the Internet checksum and the
* byte order functions.
*
*/
#include "lwip/opt.h"
#include "lwip/arch.h"
#include "lwip/def.h"
#include "lwip/inet.h"
#include "lwip/sys.h"
/* These are some reference implementations of the checksum algorithm, with the
* aim of being simple, correct and fully portable. Checksumming is the
* first thing you would want to optimize for your platform. If you create
* your own version, link it in and in your sys_arch.h put:
*
* #define LWIP_CHKSUM <your_checksum_routine>
*/
#ifndef LWIP_CHKSUM
#define LWIP_CHKSUM lwip_standard_chksum
#if 1 /* Version A */
/**
* lwip checksum
*
* @param dataptr points to start of data to be summed at any boundary
* @param len length of data to be summed
* @return host order (!) lwip checksum (non-inverted Internet sum)
*
* @note accumulator size limits summable length to 64k
* @note host endianess is irrelevant (p3 RFC1071)
*/
static u16_t
lwip_standard_chksum(void *dataptr, u16_t len)
{
u32_t acc;
u16_t src;
u8_t *octetptr;
acc = 0;
/* dataptr may be at odd or even addresses */
octetptr = (u8_t*)dataptr;
while (len > 1)
{
/* declare first octet as most significant
thus assume network order, ignoring host order */
src = (*octetptr) << 8;
octetptr++;
/* declare second octet as least significant */
src |= (*octetptr);
octetptr++;
acc += src;
len -= 2;
}
if (len > 0)
{
/* accumulate remaining octet */
src = (*octetptr) << 8;
acc += src;
}
/* add deferred carry bits */
acc = (acc >> 16) + (acc & 0x0000ffffUL);
if ((acc & 0xffff0000) != 0) {
acc = (acc >> 16) + (acc & 0x0000ffffUL);
}
/* This maybe a little confusing: reorder sum using htons()
instead of ntohs() since it has a little less call overhead.
The caller must invert bits for Internet sum ! */
return htons((u16_t)acc);
}
#endif
#if 0 /* Version B */
/*
* Curt McDowell
* Broadcom Corp.
* csm@broadcom.com
*
* IP checksum two bytes at a time with support for
* unaligned buffer.
* Works for len up to and including 0x20000.
* by Curt McDowell, Broadcom Corp. 12/08/2005
*/
static u16_t
lwip_standard_chksum(void *dataptr, int len)
{
u8_t *pb = dataptr;
u16_t *ps, t = 0;
u32_t sum = 0;
int odd = ((u32_t)pb & 1);
/* Get aligned to u16_t */
if (odd && len > 0) {
((u8_t *)&t)[1] = *pb++;
len--;
}
/* Add the bulk of the data */
ps = (u16_t *)pb;
while (len > 1) {
sum += *ps++;
len -= 2;
}
/* Consume left-over byte, if any */
if (len > 0)
((u8_t *)&t)[0] = *(u8_t *)ps;;
/* Add end bytes */
sum += t;
/* Fold 32-bit sum to 16 bits */
while (sum >> 16)
sum = (sum & 0xffff) + (sum >> 16);
/* Swap if alignment was odd */
if (odd)
sum = ((sum & 0xff) << 8) | ((sum & 0xff00) >> 8);
return sum;
}
#endif
#if 0 /* Version C */
/**
* An optimized checksum routine. Basically, it uses loop-unrolling on
* the checksum loop, treating the head and tail bytes specially, whereas
* the inner loop acts on 8 bytes at a time.
*
* @arg start of buffer to be checksummed. May be an odd byte address.
* @len number of bytes in the buffer to be checksummed.
*
* by Curt McDowell, Broadcom Corp. December 8th, 2005
*/
static u16_t
lwip_standard_chksum(void *dataptr, int len)
{
u8_t *pb = dataptr;
u16_t *ps, t = 0;
u32_t *pl;
u32_t sum = 0, tmp;
/* starts at odd byte address? */
int odd = ((u32_t)pb & 1);
if (odd && len > 0) {
((u8_t *)&t)[1] = *pb++;
len--;
}
ps = (u16_t *)pb;
if (((u32_t)ps & 3) && len > 1) {
sum += *ps++;
len -= 2;
}
pl = (u32_t *)ps;
while (len > 7) {
tmp = sum + *pl++; /* ping */
if (tmp < sum)
tmp++; /* add back carry */
sum = tmp + *pl++; /* pong */
if (sum < tmp)
sum++; /* add back carry */
len -= 8;
}
/* make room in upper bits */
sum = (sum >> 16) + (sum & 0xffff);
ps = (u16_t *)pl;
/* 16-bit aligned word remaining? */
while (len > 1) {
sum += *ps++;
len -= 2;
}
/* dangling tail byte remaining? */
if (len > 0) /* include odd byte */
((u8_t *)&t)[0] = *(u8_t *)ps;
sum += t; /* add end bytes */
while (sum >> 16) /* combine halves */
sum = (sum >> 16) + (sum & 0xffff);
if (odd)
sum = ((sum & 0xff) << 8) | ((sum & 0xff00) >> 8);
return sum;
}
#endif
#endif /* LWIP_CHKSUM */
/* inet_chksum_pseudo:
*
* Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
*/
u16_t
inet_chksum_pseudo(struct pbuf *p,
struct ip_addr *src, struct ip_addr *dest,
u8_t proto, u16_t proto_len)
{
u32_t acc;
struct pbuf *q;
u8_t swapped;
acc = 0;
swapped = 0;
/* iterate through all pbuf in chain */
for(q = p; q != NULL; q = q->next) {
LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n",
(void *)q, (void *)q->next));
acc += LWIP_CHKSUM(q->payload, q->len);
/*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/
while (acc >> 16) {
acc = (acc & 0xffffUL) + (acc >> 16);
}
if (q->len % 2 != 0) {
swapped = 1 - swapped;
acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8);
}
/*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/
}
if (swapped) {
acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8);
}
acc += (src->addr & 0xffffUL);
acc += ((src->addr >> 16) & 0xffffUL);
acc += (dest->addr & 0xffffUL);
acc += ((dest->addr >> 16) & 0xffffUL);
acc += (u32_t)htons((u16_t)proto);
acc += (u32_t)htons(proto_len);
while (acc >> 16) {
acc = (acc & 0xffffUL) + (acc >> 16);
}
LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc));
return (u16_t)~(acc & 0xffffUL);
}
/* inet_chksum:
*
* Calculates the Internet checksum over a portion of memory. Used primarily for IP
* and ICMP.
*/
u16_t
inet_chksum(void *dataptr, u16_t len)
{
u32_t acc;
acc = LWIP_CHKSUM(dataptr, len);
while (acc >> 16) {
acc = (acc & 0xffff) + (acc >> 16);
}
return (u16_t)~(acc & 0xffff);
}
u16_t
inet_chksum_pbuf(struct pbuf *p)
{
u32_t acc;
struct pbuf *q;
u8_t swapped;
acc = 0;
swapped = 0;
for(q = p; q != NULL; q = q->next) {
acc += LWIP_CHKSUM(q->payload, q->len);
while (acc >> 16) {
acc = (acc & 0xffffUL) + (acc >> 16);
}
if (q->len % 2 != 0) {
swapped = 1 - swapped;
acc = (acc & 0x00ffUL << 8) | (acc & 0xff00UL >> 8);
}
}
if (swapped) {
acc = ((acc & 0x00ffUL) << 8) | ((acc & 0xff00UL) >> 8);
}
return (u16_t)~(acc & 0xffffUL);
}
/* Here for now until needed in other places in lwIP */
#ifndef isprint
#define in_range(c, lo, up) ((u8_t)c >= lo && (u8_t)c <= up)
#define isprint(c) in_range(c, 0x20, 0x7f)
#define isdigit(c) in_range(c, '0', '9')
#define isxdigit(c) (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F'))
#define islower(c) in_range(c, 'a', 'z')
#define isspace(c) (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v')
#endif
/*
* Ascii internet address interpretation routine.
* The value returned is in network order.
*/
u32_t
inet_addr(const char *cp)
{
struct in_addr val;
if (inet_aton(cp, &val)) {
return (val.s_addr);
}
return (INADDR_NONE);
}
/*
* Check whether "cp" is a valid ascii representation
* of an Internet address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.
* This replaces inet_addr, the return value from which
* cannot distinguish between failure and a local broadcast address.
*/
int
inet_aton(const char *cp, struct in_addr *addr)
{
u32_t val;
int base, n, c;
u32_t parts[4];
u32_t *pp = parts;
c = *cp;
for (;;) {
/*
* Collect number up to ``.''.
* Values are specified as for C:
* 0x=hex, 0=octal, 1-9=decimal.
*/
if (!isdigit(c))
return (0);
val = 0;
base = 10;
if (c == '0') {
c = *++cp;
if (c == 'x' || c == 'X') {
base = 16;
c = *++cp;
} else
base = 8;
}
for (;;) {
if (isdigit(c)) {
val = (val * base) + (int)(c - '0');
c = *++cp;
} else if (base == 16 && isxdigit(c)) {
val = (val << 4) | (int)(c + 10 - (islower(c) ? 'a' : 'A'));
c = *++cp;
} else
break;
}
if (c == '.') {
/*
* Internet format:
* a.b.c.d
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
*/
if (pp >= parts + 3)
return (0);
*pp++ = val;
c = *++cp;
} else
break;
}
/*
* Check for trailing characters.
*/
if (c != '\0' && (!isprint(c) || !isspace(c)))
return (0);
/*
* Concoct the address according to
* the number of parts specified.
*/
n = pp - parts + 1;
switch (n) {
case 0:
return (0); /* initial nondigit */
case 1: /* a -- 32 bits */
break;
case 2: /* a.b -- 8.24 bits */
if (val > 0xffffff)
return (0);
val |= parts[0] << 24;
break;
case 3: /* a.b.c -- 8.8.16 bits */
if (val > 0xffff)
return (0);
val |= (parts[0] << 24) | (parts[1] << 16);
break;
case 4: /* a.b.c.d -- 8.8.8.8 bits */
if (val > 0xff)
return (0);
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
break;
}
if (addr)
addr->s_addr = htonl(val);
return (1);
}
/* Convert numeric IP address into decimal dotted ASCII representation.
* returns ptr to static buffer; not reentrant!
*/
char *
inet_ntoa(struct in_addr addr)
{
static char str[16];
u32_t s_addr = addr.s_addr;
char inv[3];
char *rp;
u8_t *ap;
u8_t rem;
u8_t n;
u8_t i;
rp = str;
ap = (u8_t *)&s_addr;
for(n = 0; n < 4; n++) {
i = 0;
do {
rem = *ap % (u8_t)10;
*ap /= (u8_t)10;
inv[i++] = '0' + rem;
} while(*ap);
while(i--)
*rp++ = inv[i];
*rp++ = '.';
ap++;
}
*--rp = 0;
return str;
}
/*
* These are reference implementations of the byte swapping functions.
* Again with the aim of being simple, correct and fully portable.
* Byte swapping is the second thing you would want to optimize. You will
* need to port it to your architecture and in your cc.h:
*
* #define LWIP_PLATFORM_BYTESWAP 1
* #define LWIP_PLATFORM_HTONS(x) <your_htons>
* #define LWIP_PLATFORM_HTONL(x) <your_htonl>
*
* Note ntohs() and ntohl() are merely references to the htonx counterparts.
*/
#ifndef BYTE_ORDER
#error BYTE_ORDER is not defined
#endif
#if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
u16_t
htons(u16_t n)
{
return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
}
u16_t
ntohs(u16_t n)
{
return htons(n);
}
u32_t
htonl(u32_t n)
{
return ((n & 0xff) << 24) |
((n & 0xff00) << 8) |
((n & 0xff0000) >> 8) |
((n & 0xff000000) >> 24);
}
u32_t
ntohl(u32_t n)
{
return htonl(n);
}
#endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/* inet6.c
*
* Functions common to all TCP/IP modules, such as the Internet checksum and the
* byte order functions.
*
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/inet.h"
/* chksum:
*
* Sums up all 16 bit words in a memory portion. Also includes any odd byte.
* This function is used by the other checksum functions.
*
* For now, this is not optimized. Must be optimized for the particular processor
* arcitecture on which it is to run. Preferebly coded in assembler.
*/
static u32_t
chksum(void *dataptr, u16_t len)
{
u16_t *sdataptr = dataptr;
u32_t acc;
for(acc = 0; len > 1; len -= 2) {
acc += *sdataptr++;
}
/* add up any odd byte */
if (len == 1) {
acc += htons((u16_t)(*(u8_t *)dataptr) << 8);
}
return acc;
}
/* inet_chksum_pseudo:
*
* Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
*/
u16_t
inet_chksum_pseudo(struct pbuf *p,
struct ip_addr *src, struct ip_addr *dest,
u8_t proto, u32_t proto_len)
{
u32_t acc;
struct pbuf *q;
u8_t swapped, i;
acc = 0;
swapped = 0;
for(q = p; q != NULL; q = q->next) {
acc += chksum(q->payload, q->len);
while (acc >> 16) {
acc = (acc & 0xffff) + (acc >> 16);
}
if (q->len % 2 != 0) {
swapped = 1 - swapped;
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
}
}
if (swapped) {
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
}
for(i = 0; i < 8; i++) {
acc += ((u16_t *)src->addr)[i] & 0xffff;
acc += ((u16_t *)dest->addr)[i] & 0xffff;
while (acc >> 16) {
acc = (acc & 0xffff) + (acc >> 16);
}
}
acc += (u16_t)htons((u16_t)proto);
acc += ((u16_t *)&proto_len)[0] & 0xffff;
acc += ((u16_t *)&proto_len)[1] & 0xffff;
while (acc >> 16) {
acc = (acc & 0xffff) + (acc >> 16);
}
return ~(acc & 0xffff);
}
/* inet_chksum:
*
* Calculates the Internet checksum over a portion of memory. Used primarely for IP
* and ICMP.
*/
u16_t
inet_chksum(void *dataptr, u16_t len)
{
u32_t acc, sum;
acc = chksum(dataptr, len);
sum = (acc & 0xffff) + (acc >> 16);
sum += (sum >> 16);
return ~(sum & 0xffff);
}
u16_t
inet_chksum_pbuf(struct pbuf *p)
{
u32_t acc;
struct pbuf *q;
u8_t swapped;
acc = 0;
swapped = 0;
for(q = p; q != NULL; q = q->next) {
acc += chksum(q->payload, q->len);
while (acc >> 16) {
acc = (acc & 0xffff) + (acc >> 16);
}
if (q->len % 2 != 0) {
swapped = 1 - swapped;
acc = (acc & 0xff << 8) | (acc & 0xff00 >> 8);
}
}
if (swapped) {
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
}
return ~(acc & 0xffff);
}

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/* Some ICMP messages should be passed to the transport protocols. This
is not implemented. */
#include <string.h>
#include "lwip/opt.h"
#include "lwip/icmp.h"
#include "lwip/inet.h"
#include "lwip/ip.h"
#include "lwip/def.h"
#include "lwip/stats.h"
#include "lwip/snmp.h"
void
icmp_input(struct pbuf *p, struct netif *inp)
{
u8_t type;
u8_t code;
struct icmp_echo_hdr *iecho;
struct ip_hdr *iphdr;
struct ip_addr tmpaddr;
u16_t hlen;
ICMP_STATS_INC(icmp.recv);
snmp_inc_icmpinmsgs();
iphdr = p->payload;
hlen = IPH_HL(iphdr) * 4;
if (pbuf_header(p, -((s16_t)hlen)) || (p->tot_len < sizeof(u16_t)*2)) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short ICMP (%"U16_F" bytes) received\n", p->tot_len));
pbuf_free(p);
ICMP_STATS_INC(icmp.lenerr);
snmp_inc_icmpinerrors();
return;
}
type = *((u8_t *)p->payload);
code = *(((u8_t *)p->payload)+1);
switch (type) {
case ICMP_ECHO:
/* broadcast or multicast destination address? */
if (ip_addr_isbroadcast(&iphdr->dest, inp) || ip_addr_ismulticast(&iphdr->dest)) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: Not echoing to multicast or broadcast pings\n"));
ICMP_STATS_INC(icmp.err);
pbuf_free(p);
return;
}
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n"));
if (p->tot_len < sizeof(struct icmp_echo_hdr)) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n"));
pbuf_free(p);
ICMP_STATS_INC(icmp.lenerr);
snmp_inc_icmpinerrors();
return;
}
iecho = p->payload;
if (inet_chksum_pbuf(p) != 0) {
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo\n"));
pbuf_free(p);
ICMP_STATS_INC(icmp.chkerr);
snmp_inc_icmpinerrors();
return;
}
tmpaddr.addr = iphdr->src.addr;
iphdr->src.addr = iphdr->dest.addr;
iphdr->dest.addr = tmpaddr.addr;
ICMPH_TYPE_SET(iecho, ICMP_ER);
/* adjust the checksum */
if (iecho->chksum >= htons(0xffff - (ICMP_ECHO << 8))) {
iecho->chksum += htons(ICMP_ECHO << 8) + 1;
} else {
iecho->chksum += htons(ICMP_ECHO << 8);
}
ICMP_STATS_INC(icmp.xmit);
/* increase number of messages attempted to send */
snmp_inc_icmpoutmsgs();
/* increase number of echo replies attempted to send */
snmp_inc_icmpoutechoreps();
pbuf_header(p, hlen);
ip_output_if(p, &(iphdr->src), IP_HDRINCL,
IPH_TTL(iphdr), 0, IP_PROTO_ICMP, inp);
break;
default:
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" code %"S16_F" not supported.\n", (s16_t)type, (s16_t)code));
ICMP_STATS_INC(icmp.proterr);
ICMP_STATS_INC(icmp.drop);
}
pbuf_free(p);
}
void
icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
{
struct pbuf *q;
struct ip_hdr *iphdr;
struct icmp_dur_hdr *idur;
q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
/* ICMP header + IP header + 8 bytes of data */
iphdr = p->payload;
idur = q->payload;
ICMPH_TYPE_SET(idur, ICMP_DUR);
ICMPH_CODE_SET(idur, t);
memcpy((u8_t *)q->payload + 8, p->payload, IP_HLEN + 8);
/* calculate checksum */
idur->chksum = 0;
idur->chksum = inet_chksum(idur, q->len);
ICMP_STATS_INC(icmp.xmit);
/* increase number of messages attempted to send */
snmp_inc_icmpoutmsgs();
/* increase number of destination unreachable messages attempted to send */
snmp_inc_icmpoutdestunreachs();
ip_output(q, NULL, &(iphdr->src),
ICMP_TTL, 0, IP_PROTO_ICMP);
pbuf_free(q);
}
#if IP_FORWARD
void
icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
{
struct pbuf *q;
struct ip_hdr *iphdr;
struct icmp_te_hdr *tehdr;
q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
iphdr = p->payload;
LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded from "));
ip_addr_debug_print(ICMP_DEBUG, &(iphdr->src));
LWIP_DEBUGF(ICMP_DEBUG, (" to "));
ip_addr_debug_print(ICMP_DEBUG, &(iphdr->dest));
LWIP_DEBUGF(ICMP_DEBUG, ("\n"));
tehdr = q->payload;
ICMPH_TYPE_SET(tehdr, ICMP_TE);
ICMPH_CODE_SET(tehdr, t);
/* copy fields from original packet */
memcpy((u8_t *)q->payload + 8, (u8_t *)p->payload, IP_HLEN + 8);
/* calculate checksum */
tehdr->chksum = 0;
tehdr->chksum = inet_chksum(tehdr, q->len);
ICMP_STATS_INC(icmp.xmit);
/* increase number of messages attempted to send */
snmp_inc_icmpoutmsgs();
/* increase number of destination unreachable messages attempted to send */
snmp_inc_icmpouttimeexcds();
ip_output(q, NULL, &(iphdr->src),
ICMP_TTL, 0, IP_PROTO_ICMP);
pbuf_free(q);
}
#endif /* IP_FORWARD */

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/* @file
*
* This is the IP layer implementation for incoming and outgoing IP traffic.
*
* @see ip_frag.c
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/ip.h"
#include "lwip/ip_frag.h"
#include "lwip/inet.h"
#include "lwip/netif.h"
#include "lwip/icmp.h"
#include "lwip/raw.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/stats.h"
#include "arch/perf.h"
#include "lwip/snmp.h"
#if LWIP_DHCP
# include "lwip/dhcp.h"
#endif /* LWIP_DHCP */
/**
* Initializes the IP layer.
*/
void
ip_init(void)
{
#if IP_FRAG
ip_frag_init();
#endif
}
/**
* Finds the appropriate network interface for a given IP address. It
* searches the list of network interfaces linearly. A match is found
* if the masked IP address of the network interface equals the masked
* IP address given to the function.
*/
struct netif *
ip_route(struct ip_addr *dest)
{
struct netif *netif;
/* iterate through netifs */
for(netif = netif_list; netif != NULL; netif = netif->next) {
/* network mask matches? */
if (ip_addr_netcmp(dest, &(netif->ip_addr), &(netif->netmask))) {
/* return netif on which to forward IP packet */
return netif;
}
}
/* no matching netif found, use default netif */
return netif_default;
}
#if IP_FORWARD
/**
* Forwards an IP packet. It finds an appropriate route for the
* packet, decrements the TTL value of the packet, adjusts the
* checksum and outputs the packet on the appropriate interface.
*/
static struct netif *
ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp)
{
struct netif *netif;
PERF_START;
/* Find network interface where to forward this IP packet to. */
netif = ip_route((struct ip_addr *)&(iphdr->dest));
if (netif == NULL) {
LWIP_DEBUGF(IP_DEBUG, ("ip_forward: no forwarding route for 0x%"X32_F" found\n",
iphdr->dest.addr));
snmp_inc_ipoutnoroutes();
return (struct netif *)NULL;
}
/* Do not forward packets onto the same network interface on which
* they arrived. */
if (netif == inp) {
LWIP_DEBUGF(IP_DEBUG, ("ip_forward: not bouncing packets back on incoming interface.\n"));
snmp_inc_ipoutnoroutes();
return (struct netif *)NULL;
}
/* decrement TTL */
IPH_TTL_SET(iphdr, IPH_TTL(iphdr) - 1);
/* send ICMP if TTL == 0 */
if (IPH_TTL(iphdr) == 0) {
snmp_inc_ipinhdrerrors();
/* Don't send ICMP messages in response to ICMP messages */
if (IPH_PROTO(iphdr) != IP_PROTO_ICMP) {
icmp_time_exceeded(p, ICMP_TE_TTL);
}
return (struct netif *)NULL;
}
/* Incrementally update the IP checksum. */
if (IPH_CHKSUM(iphdr) >= htons(0xffff - 0x100)) {
IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + htons(0x100) + 1);
} else {
IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + htons(0x100));
}
LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to 0x%"X32_F"\n",
iphdr->dest.addr));
IP_STATS_INC(ip.fw);
IP_STATS_INC(ip.xmit);
snmp_inc_ipforwdatagrams();
PERF_STOP("ip_forward");
/* transmit pbuf on chosen interface */
netif->output(netif, p, (struct ip_addr *)&(iphdr->dest));
return netif;
}
#endif /* IP_FORWARD */
/**
* This function is called by the network interface device driver when
* an IP packet is received. The function does the basic checks of the
* IP header such as packet size being at least larger than the header
* size etc. If the packet was not destined for us, the packet is
* forwarded (using ip_forward). The IP checksum is always checked.
*
* Finally, the packet is sent to the upper layer protocol input function.
*
*
*
*/
err_t
ip_input(struct pbuf *p, struct netif *inp) {
struct ip_hdr *iphdr;
struct netif *netif;
u16_t iphdrlen;
IP_STATS_INC(ip.recv);
snmp_inc_ipinreceives();
/* identify the IP header */
iphdr = p->payload;
if (IPH_V(iphdr) != 4) {
LWIP_DEBUGF(IP_DEBUG | 1, ("IP packet dropped due to bad version number %"U16_F"\n", IPH_V(iphdr)));
ip_debug_print(p);
pbuf_free(p);
IP_STATS_INC(ip.err);
IP_STATS_INC(ip.drop);
snmp_inc_ipinhdrerrors();
return ERR_OK;
}
/* obtain IP header length in number of 32-bit words */
iphdrlen = IPH_HL(iphdr);
/* calculate IP header length in bytes */
iphdrlen *= 4;
/* header length exceeds first pbuf length? */
if (iphdrlen > p->len) {
LWIP_DEBUGF(IP_DEBUG | 2, ("IP header (len %"U16_F") does not fit in first pbuf (len %"U16_F"), IP packet droppped.\n",
iphdrlen, p->len));
/* free (drop) packet pbufs */
pbuf_free(p);
IP_STATS_INC(ip.lenerr);
IP_STATS_INC(ip.drop);
snmp_inc_ipindiscards();
return ERR_OK;
}
/* verify checksum */
#if CHECKSUM_CHECK_IP
if (inet_chksum(iphdr, iphdrlen) != 0) {
LWIP_DEBUGF(IP_DEBUG | 2, ("Checksum (0x%"X16_F") failed, IP packet dropped.\n", inet_chksum(iphdr, iphdrlen)));
ip_debug_print(p);
pbuf_free(p);
IP_STATS_INC(ip.chkerr);
IP_STATS_INC(ip.drop);
snmp_inc_ipinhdrerrors();
return ERR_OK;
}
#endif
/* Trim pbuf. This should have been done at the netif layer,
* but we'll do it anyway just to be sure that its done. */
pbuf_realloc(p, ntohs(IPH_LEN(iphdr)));
/* match packet against an interface, i.e. is this packet for us? */
for (netif = netif_list; netif != NULL; netif = netif->next) {
LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest 0x%"X32_F" netif->ip_addr 0x%"X32_F" (0x%"X32_F", 0x%"X32_F", 0x%"X32_F")\n",
iphdr->dest.addr, netif->ip_addr.addr,
iphdr->dest.addr & netif->netmask.addr,
netif->ip_addr.addr & netif->netmask.addr,
iphdr->dest.addr & ~(netif->netmask.addr)));
/* interface is up and configured? */
if ((netif_is_up(netif)) && (!ip_addr_isany(&(netif->ip_addr))))
{
/* unicast to this interface address? */
if (ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr)) ||
/* or broadcast on this interface network address? */
ip_addr_isbroadcast(&(iphdr->dest), netif)) {
LWIP_DEBUGF(IP_DEBUG, ("ip_input: packet accepted on interface %c%c\n",
netif->name[0], netif->name[1]));
/* break out of for loop */
break;
}
}
}
#if LWIP_DHCP
/* Pass DHCP messages regardless of destination address. DHCP traffic is addressed
* using link layer addressing (such as Ethernet MAC) so we must not filter on IP.
* According to RFC 1542 section 3.1.1, referred by RFC 2131).
*/
if (netif == NULL) {
/* remote port is DHCP server? */
if (IPH_PROTO(iphdr) == IP_PROTO_UDP) {
LWIP_DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: UDP packet to DHCP client port %"U16_F"\n",
ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdrlen))->dest)));
if (ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdrlen))->dest) == DHCP_CLIENT_PORT) {
LWIP_DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: DHCP packet accepted.\n"));
netif = inp;
}
}
}
#endif /* LWIP_DHCP */
/* packet not for us? */
if (netif == NULL) {
/* packet not for us, route or discard */
LWIP_DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: packet not for us.\n"));
#if IP_FORWARD
/* non-broadcast packet? */
if (!ip_addr_isbroadcast(&(iphdr->dest), inp)) {
/* try to forward IP packet on (other) interfaces */
ip_forward(p, iphdr, inp);
}
else
#endif /* IP_FORWARD */
{
snmp_inc_ipinaddrerrors();
snmp_inc_ipindiscards();
}
pbuf_free(p);
return ERR_OK;
}
/* packet consists of multiple fragments? */
if ((IPH_OFFSET(iphdr) & htons(IP_OFFMASK | IP_MF)) != 0) {
#if IP_REASSEMBLY /* packet fragment reassembly code present? */
LWIP_DEBUGF(IP_DEBUG, ("IP packet is a fragment (id=0x%04"X16_F" tot_len=%"U16_F" len=%"U16_F" MF=%"U16_F" offset=%"U16_F"), calling ip_reass()\n",
ntohs(IPH_ID(iphdr)), p->tot_len, ntohs(IPH_LEN(iphdr)), !!(IPH_OFFSET(iphdr) & htons(IP_MF)), (ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK)*8));
/* reassemble the packet*/
p = ip_reass(p);
/* packet not fully reassembled yet? */
if (p == NULL) {
return ERR_OK;
}
iphdr = p->payload;
#else /* IP_REASSEMBLY == 0, no packet fragment reassembly code present */
pbuf_free(p);
LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since it was fragmented (0x%"X16_F") (while IP_REASSEMBLY == 0).\n",
ntohs(IPH_OFFSET(iphdr))));
IP_STATS_INC(ip.opterr);
IP_STATS_INC(ip.drop);
/* unsupported protocol feature */
snmp_inc_ipinunknownprotos();
return ERR_OK;
#endif /* IP_REASSEMBLY */
}
#if IP_OPTIONS == 0 /* no support for IP options in the IP header? */
if (iphdrlen > IP_HLEN) {
LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since there were IP options (while IP_OPTIONS == 0).\n"));
pbuf_free(p);
IP_STATS_INC(ip.opterr);
IP_STATS_INC(ip.drop);
/* unsupported protocol feature */
snmp_inc_ipinunknownprotos();
return ERR_OK;
}
#endif /* IP_OPTIONS == 0 */
/* send to upper layers */
LWIP_DEBUGF(IP_DEBUG, ("ip_input: \n"));
ip_debug_print(p);
LWIP_DEBUGF(IP_DEBUG, ("ip_input: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len));
#if LWIP_RAW
/* raw input did not eat the packet? */
if (raw_input(p, inp) == 0) {
#endif /* LWIP_RAW */
switch (IPH_PROTO(iphdr)) {
#if LWIP_UDP
case IP_PROTO_UDP:
case IP_PROTO_UDPLITE:
snmp_inc_ipindelivers();
udp_input(p, inp);
break;
#endif /* LWIP_UDP */
#if LWIP_TCP
case IP_PROTO_TCP:
snmp_inc_ipindelivers();
tcp_input(p, inp);
break;
#endif /* LWIP_TCP */
case IP_PROTO_ICMP:
snmp_inc_ipindelivers();
icmp_input(p, inp);
break;
default:
/* send ICMP destination protocol unreachable unless is was a broadcast */
if (!ip_addr_isbroadcast(&(iphdr->dest), inp) &&
!ip_addr_ismulticast(&(iphdr->dest))) {
p->payload = iphdr;
icmp_dest_unreach(p, ICMP_DUR_PROTO);
}
pbuf_free(p);
LWIP_DEBUGF(IP_DEBUG | 2, ("Unsupported transport protocol %"U16_F"\n", IPH_PROTO(iphdr)));
IP_STATS_INC(ip.proterr);
IP_STATS_INC(ip.drop);
snmp_inc_ipinunknownprotos();
}
#if LWIP_RAW
} /* LWIP_RAW */
#endif
return ERR_OK;
}
/**
* Sends an IP packet on a network interface. This function constructs
* the IP header and calculates the IP header checksum. If the source
* IP address is NULL, the IP address of the outgoing network
* interface is filled in as source address.
*
* @note ip_id: RFC791 "some host may be able to simply use
* unique identifiers independent of destination"
*/
err_t
ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
u8_t ttl, u8_t tos,
u8_t proto, struct netif *netif)
{
struct ip_hdr *iphdr;
static u16_t ip_id = 0;
snmp_inc_ipoutrequests();
if (dest != IP_HDRINCL) {
if (pbuf_header(p, IP_HLEN)) {
LWIP_DEBUGF(IP_DEBUG | 2, ("ip_output: not enough room for IP header in pbuf\n"));
IP_STATS_INC(ip.err);
snmp_inc_ipoutdiscards();
return ERR_BUF;
}
iphdr = p->payload;
IPH_TTL_SET(iphdr, ttl);
IPH_PROTO_SET(iphdr, proto);
ip_addr_set(&(iphdr->dest), dest);
IPH_VHLTOS_SET(iphdr, 4, IP_HLEN / 4, tos);
IPH_LEN_SET(iphdr, htons(p->tot_len));
IPH_OFFSET_SET(iphdr, htons(IP_DF));
IPH_ID_SET(iphdr, htons(ip_id));
++ip_id;
if (ip_addr_isany(src)) {
ip_addr_set(&(iphdr->src), &(netif->ip_addr));
} else {
ip_addr_set(&(iphdr->src), src);
}
IPH_CHKSUM_SET(iphdr, 0);
#if CHECKSUM_GEN_IP
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
#endif
} else {
iphdr = p->payload;
dest = &(iphdr->dest);
}
#if IP_FRAG
/* don't fragment if interface has mtu set to 0 [loopif] */
if (netif->mtu && (p->tot_len > netif->mtu))
return ip_frag(p,netif,dest);
#endif
IP_STATS_INC(ip.xmit);
LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c%"U16_F"\n", netif->name[0], netif->name[1], netif->num));
ip_debug_print(p);
LWIP_DEBUGF(IP_DEBUG, ("netif->output()"));
return netif->output(netif, p, dest);
}
/**
* Simple interface to ip_output_if. It finds the outgoing network
* interface and calls upon ip_output_if to do the actual work.
*/
err_t
ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
u8_t ttl, u8_t tos, u8_t proto)
{
struct netif *netif;
if ((netif = ip_route(dest)) == NULL) {
LWIP_DEBUGF(IP_DEBUG | 2, ("ip_output: No route to 0x%"X32_F"\n", dest->addr));
IP_STATS_INC(ip.rterr);
snmp_inc_ipoutnoroutes();
return ERR_RTE;
}
return ip_output_if(p, src, dest, ttl, tos, proto, netif);
}
#if IP_DEBUG
void
ip_debug_print(struct pbuf *p)
{
struct ip_hdr *iphdr = p->payload;
u8_t *payload;
payload = (u8_t *)iphdr + IP_HLEN;
LWIP_DEBUGF(IP_DEBUG, ("IP header:\n"));
LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(IP_DEBUG, ("|%2"S16_F" |%2"S16_F" | 0x%02"X16_F" | %5"U16_F" | (v, hl, tos, len)\n",
IPH_V(iphdr),
IPH_HL(iphdr),
IPH_TOS(iphdr),
ntohs(IPH_LEN(iphdr))));
LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(IP_DEBUG, ("| %5"U16_F" |%"U16_F"%"U16_F"%"U16_F"| %4"U16_F" | (id, flags, offset)\n",
ntohs(IPH_ID(iphdr)),
ntohs(IPH_OFFSET(iphdr)) >> 15 & 1,
ntohs(IPH_OFFSET(iphdr)) >> 14 & 1,
ntohs(IPH_OFFSET(iphdr)) >> 13 & 1,
ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK));
LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | 0x%04"X16_F" | (ttl, proto, chksum)\n",
IPH_TTL(iphdr),
IPH_PROTO(iphdr),
ntohs(IPH_CHKSUM(iphdr))));
LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | %3"U16_F" | %3"U16_F" | (src)\n",
ip4_addr1(&iphdr->src),
ip4_addr2(&iphdr->src),
ip4_addr3(&iphdr->src),
ip4_addr4(&iphdr->src)));
LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | %3"U16_F" | %3"U16_F" | (dest)\n",
ip4_addr1(&iphdr->dest),
ip4_addr2(&iphdr->dest),
ip4_addr3(&iphdr->dest),
ip4_addr4(&iphdr->dest)));
LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
}
#endif /* IP_DEBUG */

78
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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/ip_addr.h"
#include "lwip/inet.h"
#include "lwip/netif.h"
#define IP_ADDR_ANY_VALUE 0x00000000UL
#define IP_ADDR_BROADCAST_VALUE 0xffffffffUL
/* used by IP_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */
const struct ip_addr ip_addr_any = { IP_ADDR_ANY_VALUE };
const struct ip_addr ip_addr_broadcast = { IP_ADDR_BROADCAST_VALUE };
/* Determine if an address is a broadcast address on a network interface
*
* @param addr address to be checked
* @param netif the network interface against which the address is checked
* @return returns non-zero if the address is a broadcast address
*
*/
u8_t ip_addr_isbroadcast(struct ip_addr *addr, struct netif *netif)
{
u32_t addr2test;
addr2test = addr->addr;
/* all ones (broadcast) or all zeroes (old skool broadcast) */
if ((~addr2test == IP_ADDR_ANY_VALUE) ||
(addr2test == IP_ADDR_ANY_VALUE))
return 1;
/* no broadcast support on this network interface? */
else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0)
/* the given address cannot be a broadcast address
* nor can we check against any broadcast addresses */
return 0;
/* address matches network interface address exactly? => no broadcast */
else if (addr2test == netif->ip_addr.addr)
return 0;
/* on the same (sub) network... */
else if (ip_addr_netcmp(addr, &(netif->ip_addr), &(netif->netmask))
/* ...and host identifier bits are all ones? =>... */
&& ((addr2test & ~netif->netmask.addr) ==
(IP_ADDR_BROADCAST_VALUE & ~netif->netmask.addr)))
/* => network broadcast address */
return 1;
else
return 0;
}

388
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/* @file
*
* This is the IP packet segmentation and reassembly implementation.
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Jani Monoses <jani@iv.ro>
* original reassembly code by Adam Dunkels <adam@sics.se>
*
*/
#include <string.h>
#include "lwip/opt.h"
#include "lwip/ip.h"
#include "lwip/ip_frag.h"
#include "lwip/netif.h"
#include "lwip/snmp.h"
#include "lwip/stats.h"
static u8_t ip_reassbuf[IP_HLEN + IP_REASS_BUFSIZE];
static u8_t ip_reassbitmap[IP_REASS_BUFSIZE / (8 * 8) + 1];
static const u8_t bitmap_bits[8] = { 0xff, 0x7f, 0x3f, 0x1f,
0x0f, 0x07, 0x03, 0x01
};
static u16_t ip_reasslen;
static u8_t ip_reassflags;
#define IP_REASS_FLAG_LASTFRAG 0x01
static u8_t ip_reasstmr;
/*
* Copy len bytes from offset in pbuf to buffer
*
* helper used by both ip_reass and ip_frag
*/
static struct pbuf *
copy_from_pbuf(struct pbuf *p, u16_t * offset,
u8_t * buffer, u16_t len)
{
u16_t l;
p->payload = (u8_t *)p->payload + *offset;
p->len -= *offset;
while (len) {
l = len < p->len ? len : p->len;
memcpy(buffer, p->payload, l);
buffer += l;
len -= l;
if (len)
p = p->next;
else
*offset = l;
}
return p;
}
/**
* Initializes IP reassembly and fragmentation states.
*/
void
ip_frag_init(void)
{
ip_reasstmr = 0;
ip_reassflags = 0;
ip_reasslen = 0;
memset(ip_reassbitmap, 0, sizeof(ip_reassbitmap));
}
/**
* Reassembly timer base function
* for both NO_SYS == 0 and 1 (!).
*
* Should be called every 1000 msec.
*/
void
ip_reass_tmr(void)
{
if (ip_reasstmr > 0) {
ip_reasstmr--;
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer dec %"U16_F"\n",(u16_t)ip_reasstmr));
if (ip_reasstmr == 0) {
/* reassembly timed out */
snmp_inc_ipreasmfails();
}
}
}
/**
* Reassembles incoming IP fragments into an IP datagram.
*
* @param p points to a pbuf chain of the fragment
* @return NULL if reassembly is incomplete, ? otherwise
*/
struct pbuf *
ip_reass(struct pbuf *p)
{
struct pbuf *q;
struct ip_hdr *fraghdr, *iphdr;
u16_t offset, len;
u16_t i;
IPFRAG_STATS_INC(ip_frag.recv);
snmp_inc_ipreasmreqds();
iphdr = (struct ip_hdr *) ip_reassbuf;
fraghdr = (struct ip_hdr *) p->payload;
/* If ip_reasstmr is zero, no packet is present in the buffer, so we
write the IP header of the fragment into the reassembly
buffer. The timer is updated with the maximum age. */
if (ip_reasstmr == 0) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: new packet\n"));
memcpy(iphdr, fraghdr, IP_HLEN);
ip_reasstmr = IP_REASS_MAXAGE;
ip_reassflags = 0;
/* Clear the bitmap. */
memset(ip_reassbitmap, 0, sizeof(ip_reassbitmap));
}
/* Check if the incoming fragment matches the one currently present
in the reasembly buffer. If so, we proceed with copying the
fragment into the buffer. */
if (ip_addr_cmp(&iphdr->src, &fraghdr->src) &&
ip_addr_cmp(&iphdr->dest, &fraghdr->dest) &&
IPH_ID(iphdr) == IPH_ID(fraghdr)) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: matching previous fragment ID=%"X16_F"\n",
ntohs(IPH_ID(fraghdr))));
IPFRAG_STATS_INC(ip_frag.cachehit);
/* Find out the offset in the reassembly buffer where we should
copy the fragment. */
len = ntohs(IPH_LEN(fraghdr)) - IPH_HL(fraghdr) * 4;
offset = (ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) * 8;
/* If the offset or the offset + fragment length overflows the
reassembly buffer, we discard the entire packet. */
if ((offset > IP_REASS_BUFSIZE) || ((offset + len) > IP_REASS_BUFSIZE)) {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: fragment outside of buffer (%"S16_F":%"S16_F"/%"S16_F").\n", offset,
offset + len, IP_REASS_BUFSIZE));
ip_reasstmr = 0;
snmp_inc_ipreasmfails();
goto nullreturn;
}
/* Copy the fragment into the reassembly buffer, at the right
offset. */
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: copying with offset %"S16_F" into %"S16_F":%"S16_F"\n", offset,
IP_HLEN + offset, IP_HLEN + offset + len));
i = IPH_HL(fraghdr) * 4;
copy_from_pbuf(p, &i, &ip_reassbuf[IP_HLEN + offset], len);
/* Update the bitmap. */
if (offset / (8 * 8) == (offset + len) / (8 * 8)) {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: updating single byte in bitmap.\n"));
/* If the two endpoints are in the same byte, we only update that byte. */
LWIP_ASSERT("offset / (8 * 8) < sizeof(ip_reassbitmap)",
offset / (8 * 8) < sizeof(ip_reassbitmap));
ip_reassbitmap[offset / (8 * 8)] |=
bitmap_bits[(offset / 8) & 7] &
~bitmap_bits[((offset + len) / 8) & 7];
} else {
/* If the two endpoints are in different bytes, we update the
bytes in the endpoints and fill the stuff inbetween with
0xff. */
LWIP_ASSERT("offset / (8 * 8) < sizeof(ip_reassbitmap)",
offset / (8 * 8) < sizeof(ip_reassbitmap));
ip_reassbitmap[offset / (8 * 8)] |= bitmap_bits[(offset / 8) & 7];
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: updating many bytes in bitmap (%"S16_F":%"S16_F").\n",
1 + offset / (8 * 8), (offset + len) / (8 * 8)));
for (i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) {
ip_reassbitmap[i] = 0xff;
}
LWIP_ASSERT("(offset + len) / (8 * 8) < sizeof(ip_reassbitmap)",
(offset + len) / (8 * 8) < sizeof(ip_reassbitmap));
ip_reassbitmap[(offset + len) / (8 * 8)] |=
~bitmap_bits[((offset + len) / 8) & 7];
}
/* If this fragment has the More Fragments flag set to zero, we
know that this is the last fragment, so we can calculate the
size of the entire packet. We also set the
IP_REASS_FLAG_LASTFRAG flag to indicate that we have received
the final fragment. */
if ((ntohs(IPH_OFFSET(fraghdr)) & IP_MF) == 0) {
ip_reassflags |= IP_REASS_FLAG_LASTFRAG;
ip_reasslen = offset + len;
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: last fragment seen, total len %"S16_F"\n",
ip_reasslen));
}
/* Finally, we check if we have a full packet in the buffer. We do
this by checking if we have the last fragment and if all bits
in the bitmap are set. */
if (ip_reassflags & IP_REASS_FLAG_LASTFRAG) {
/* Check all bytes up to and including all but the last byte in
the bitmap. */
LWIP_ASSERT("ip_reasslen / (8 * 8) - 1 < sizeof(ip_reassbitmap)",
ip_reasslen / (8 * 8) - 1 < ((u16_t) sizeof(ip_reassbitmap)));
for (i = 0; i < ip_reasslen / (8 * 8) - 1; ++i) {
if (ip_reassbitmap[i] != 0xff) {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: last fragment seen, bitmap %"S16_F"/%"S16_F" failed (%"X16_F")\n",
i, ip_reasslen / (8 * 8) - 1, ip_reassbitmap[i]));
goto nullreturn;
}
}
/* Check the last byte in the bitmap. It should contain just the
right amount of bits. */
LWIP_ASSERT("ip_reasslen / (8 * 8) < sizeof(ip_reassbitmap)",
ip_reasslen / (8 * 8) < sizeof(ip_reassbitmap));
if (ip_reassbitmap[ip_reasslen / (8 * 8)] !=
(u8_t) ~ bitmap_bits[ip_reasslen / 8 & 7]) {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: last fragment seen, bitmap %"S16_F" didn't contain %"X16_F" (%"X16_F")\n",
ip_reasslen / (8 * 8), ~bitmap_bits[ip_reasslen / 8 & 7],
ip_reassbitmap[ip_reasslen / (8 * 8)]));
goto nullreturn;
}
/* Pretend to be a "normal" (i.e., not fragmented) IP packet
from now on. */
ip_reasslen += IP_HLEN;
IPH_LEN_SET(iphdr, htons(ip_reasslen));
IPH_OFFSET_SET(iphdr, 0);
IPH_CHKSUM_SET(iphdr, 0);
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
/* If we have come this far, we have a full packet in the
buffer, so we allocate a pbuf and copy the packet into it. We
also reset the timer. */
ip_reasstmr = 0;
pbuf_free(p);
p = pbuf_alloc(PBUF_LINK, ip_reasslen, PBUF_POOL);
if (p != NULL) {
i = 0;
for (q = p; q != NULL; q = q->next) {
/* Copy enough bytes to fill this pbuf in the chain. The
available data in the pbuf is given by the q->len variable. */
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: memcpy from %p (%"S16_F") to %p, %"S16_F" bytes\n",
(void *)&ip_reassbuf[i], i, q->payload,
q->len > ip_reasslen - i ? ip_reasslen - i : q->len));
memcpy(q->payload, &ip_reassbuf[i],
q->len > ip_reasslen - i ? ip_reasslen - i : q->len);
i += q->len;
}
IPFRAG_STATS_INC(ip_frag.fw);
snmp_inc_ipreasmoks();
} else {
LWIP_DEBUGF(IP_REASS_DEBUG,
("ip_reass: pbuf_alloc(PBUF_LINK, ip_reasslen=%"U16_F", PBUF_POOL) failed\n", ip_reasslen));
IPFRAG_STATS_INC(ip_frag.memerr);
snmp_inc_ipreasmfails();
}
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: p %p\n", (void*)p));
return p;
}
}
nullreturn:
IPFRAG_STATS_INC(ip_frag.drop);
pbuf_free(p);
return NULL;
}
static u8_t buf[MEM_ALIGN_SIZE(IP_FRAG_MAX_MTU)];
/**
* Fragment an IP datagram if too large for the netif.
*
* Chop the datagram in MTU sized chunks and send them in order
* by using a fixed size static memory buffer (PBUF_ROM)
*/
err_t
ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest)
{
struct pbuf *rambuf;
struct pbuf *header;
struct ip_hdr *iphdr;
u16_t nfb = 0;
u16_t left, cop;
u16_t mtu = netif->mtu;
u16_t ofo, omf;
u16_t last;
u16_t poff = IP_HLEN;
u16_t tmp;
/* Get a RAM based MTU sized pbuf */
rambuf = pbuf_alloc(PBUF_LINK, 0, PBUF_REF);
if (rambuf == NULL) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc(PBUF_LINK, 0, PBUF_REF) failed\n"));
return ERR_MEM;
}
rambuf->tot_len = rambuf->len = mtu;
rambuf->payload = MEM_ALIGN((void *)buf);
/* Copy the IP header in it */
iphdr = rambuf->payload;
memcpy(iphdr, p->payload, IP_HLEN);
/* Save original offset */
tmp = ntohs(IPH_OFFSET(iphdr));
ofo = tmp & IP_OFFMASK;
omf = tmp & IP_MF;
left = p->tot_len - IP_HLEN;
while (left) {
last = (left <= mtu - IP_HLEN);
/* Set new offset and MF flag */
ofo += nfb;
tmp = omf | (IP_OFFMASK & (ofo));
if (!last)
tmp = tmp | IP_MF;
IPH_OFFSET_SET(iphdr, htons(tmp));
/* Fill this fragment */
nfb = (mtu - IP_HLEN) / 8;
cop = last ? left : nfb * 8;
p = copy_from_pbuf(p, &poff, (u8_t *) iphdr + IP_HLEN, cop);
/* Correct header */
IPH_LEN_SET(iphdr, htons(cop + IP_HLEN));
IPH_CHKSUM_SET(iphdr, 0);
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
if (last)
pbuf_realloc(rambuf, left + IP_HLEN);
/* This part is ugly: we alloc a RAM based pbuf for
* the link level header for each chunk and then
* free it.A PBUF_ROM style pbuf for which pbuf_header
* worked would make things simpler.
*/
header = pbuf_alloc(PBUF_LINK, 0, PBUF_RAM);
if (header != NULL) {
pbuf_chain(header, rambuf);
netif->output(netif, header, dest);
IPFRAG_STATS_INC(ip_frag.xmit);
snmp_inc_ipfragcreates();
pbuf_free(header);
} else {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc() for header failed\n"));
pbuf_free(rambuf);
return ERR_MEM;
}
left -= cop;
}
pbuf_free(rambuf);
snmp_inc_ipfragoks();
return ERR_OK;
}

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/** @file
*
* Dynamic memory manager
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <string.h>
#include "lwip/arch.h"
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/sys.h"
#include "lwip/stats.h"
#if (MEM_LIBC_MALLOC == 0)
/* lwIP replacement for your libc malloc() */
struct mem {
mem_size_t next, prev;
#if MEM_ALIGNMENT == 1
u8_t used;
#elif MEM_ALIGNMENT == 2
u16_t used;
#elif MEM_ALIGNMENT == 4
u32_t used;
#elif MEM_ALIGNMENT == 8
u64_t used;
#else
#error "unhandled MEM_ALIGNMENT size"
#endif /* MEM_ALIGNMENT */
};
static struct mem *ram_end;
#if 1
/* Adam original */
static u8_t ram[MEM_SIZE + sizeof(struct mem) + MEM_ALIGNMENT];
#else
/* Christiaan alignment fix */
static u8_t *ram;
static struct mem ram_heap[1 + ( (MEM_SIZE + sizeof(struct mem) - 1) / sizeof(struct mem))];
#endif
#define MIN_SIZE 12
#if 0 /* this one does not align correctly for some, resulting in crashes */
#define SIZEOF_STRUCT_MEM (unsigned int)MEM_ALIGN_SIZE(sizeof(struct mem))
#else
#define SIZEOF_STRUCT_MEM (sizeof(struct mem) + \
(((sizeof(struct mem) % MEM_ALIGNMENT) == 0)? 0 : \
(4 - (sizeof(struct mem) % MEM_ALIGNMENT))))
#endif
static struct mem *lfree; /* pointer to the lowest free block */
static sys_sem_t mem_sem;
static void
plug_holes(struct mem *mem)
{
struct mem *nmem;
struct mem *pmem;
LWIP_ASSERT("plug_holes: mem >= ram", (u8_t *)mem >= ram);
LWIP_ASSERT("plug_holes: mem < ram_end", (u8_t *)mem < (u8_t *)ram_end);
LWIP_ASSERT("plug_holes: mem->used == 0", mem->used == 0);
/* plug hole forward */
LWIP_ASSERT("plug_holes: mem->next <= MEM_SIZE", mem->next <= MEM_SIZE);
nmem = (struct mem *)&ram[mem->next];
if (mem != nmem && nmem->used == 0 && (u8_t *)nmem != (u8_t *)ram_end) {
if (lfree == nmem) {
lfree = mem;
}
mem->next = nmem->next;
((struct mem *)&ram[nmem->next])->prev = (u8_t *)mem - ram;
}
/* plug hole backward */
pmem = (struct mem *)&ram[mem->prev];
if (pmem != mem && pmem->used == 0) {
if (lfree == mem) {
lfree = pmem;
}
pmem->next = mem->next;
((struct mem *)&ram[mem->next])->prev = (u8_t *)pmem - ram;
}
}
void
mem_init(void)
{
struct mem *mem;
#if 1
/* Adam original */
#else
/* Christiaan alignment fix */
ram = (u8_t*)ram_heap;
#endif
memset(ram, 0, MEM_SIZE);
mem = (struct mem *)ram;
mem->next = MEM_SIZE;
mem->prev = 0;
mem->used = 0;
ram_end = (struct mem *)&ram[MEM_SIZE];
ram_end->used = 1;
ram_end->next = MEM_SIZE;
ram_end->prev = MEM_SIZE;
mem_sem = sys_sem_new(1);
lfree = (struct mem *)ram;
#if MEM_STATS
lwip_stats.mem.avail = MEM_SIZE;
#endif /* MEM_STATS */
}
void
mem_free(void *rmem)
{
struct mem *mem;
if (rmem == NULL) {
LWIP_DEBUGF(MEM_DEBUG | DBG_TRACE | 2, ("mem_free(p == NULL) was called.\n"));
return;
}
sys_sem_wait(mem_sem);
LWIP_ASSERT("mem_free: legal memory", (u8_t *)rmem >= (u8_t *)ram &&
(u8_t *)rmem < (u8_t *)ram_end);
if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) {
LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_free: illegal memory\n"));
#if MEM_STATS
++lwip_stats.mem.err;
#endif /* MEM_STATS */
sys_sem_signal(mem_sem);
return;
}
mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM);
LWIP_ASSERT("mem_free: mem->used", mem->used);
mem->used = 0;
if (mem < lfree) {
lfree = mem;
}
#if MEM_STATS
lwip_stats.mem.used -= mem->next - ((u8_t *)mem - ram);
#endif /* MEM_STATS */
plug_holes(mem);
sys_sem_signal(mem_sem);
}
void *
mem_realloc(void *rmem, mem_size_t newsize)
{
mem_size_t size;
mem_size_t ptr, ptr2;
struct mem *mem, *mem2;
/* Expand the size of the allocated memory region so that we can
adjust for alignment. */
if ((newsize % MEM_ALIGNMENT) != 0) {
newsize += MEM_ALIGNMENT - ((newsize + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT);
}
if (newsize > MEM_SIZE) {
return NULL;
}
sys_sem_wait(mem_sem);
LWIP_ASSERT("mem_realloc: legal memory", (u8_t *)rmem >= (u8_t *)ram &&
(u8_t *)rmem < (u8_t *)ram_end);
if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) {
LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_realloc: illegal memory\n"));
return rmem;
}
mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM);
ptr = (u8_t *)mem - ram;
size = mem->next - ptr - SIZEOF_STRUCT_MEM;
#if MEM_STATS
lwip_stats.mem.used -= (size - newsize);
#endif /* MEM_STATS */
if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE < size) {
ptr2 = ptr + SIZEOF_STRUCT_MEM + newsize;
mem2 = (struct mem *)&ram[ptr2];
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
mem->next = ptr2;
if (mem2->next != MEM_SIZE) {
((struct mem *)&ram[mem2->next])->prev = ptr2;
}
plug_holes(mem2);
}
sys_sem_signal(mem_sem);
return rmem;
}
#if 1
/**
* Adam's mem_malloc(), suffers from bug #17922
* Set if to 0 for alternative mem_malloc().
*/
void *
mem_malloc(mem_size_t size)
{
mem_size_t ptr, ptr2;
struct mem *mem, *mem2;
if (size == 0) {
return NULL;
}
/* Expand the size of the allocated memory region so that we can
adjust for alignment. */
if ((size % MEM_ALIGNMENT) != 0) {
size += MEM_ALIGNMENT - ((size + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT);
}
if (size > MEM_SIZE) {
return NULL;
}
sys_sem_wait(mem_sem);
for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE; ptr = ((struct mem *)&ram[ptr])->next) {
mem = (struct mem *)&ram[ptr];
if (!mem->used &&
mem->next - (ptr + SIZEOF_STRUCT_MEM) >= size + SIZEOF_STRUCT_MEM) {
ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
mem2 = (struct mem *)&ram[ptr2];
mem2->prev = ptr;
mem2->next = mem->next;
mem->next = ptr2;
if (mem2->next != MEM_SIZE) {
((struct mem *)&ram[mem2->next])->prev = ptr2;
}
mem2->used = 0;
mem->used = 1;
#if MEM_STATS
lwip_stats.mem.used += (size + SIZEOF_STRUCT_MEM);
/* if (lwip_stats.mem.max < lwip_stats.mem.used) {
lwip_stats.mem.max = lwip_stats.mem.used;
} */
if (lwip_stats.mem.max < ptr2) {
lwip_stats.mem.max = ptr2;
}
#endif /* MEM_STATS */
if (mem == lfree) {
/* Find next free block after mem */
while (lfree->used && lfree != ram_end) {
lfree = (struct mem *)&ram[lfree->next];
}
LWIP_ASSERT("mem_malloc: !lfree->used", !lfree->used);
}
sys_sem_signal(mem_sem);
LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.",
(mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end);
LWIP_ASSERT("mem_malloc: allocated memory properly aligned.",
(unsigned long)((u8_t *)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0);
return (u8_t *)mem + SIZEOF_STRUCT_MEM;
}
}
LWIP_DEBUGF(MEM_DEBUG | 2, ("mem_malloc: could not allocate %"S16_F" bytes\n", (s16_t)size));
#if MEM_STATS
++lwip_stats.mem.err;
#endif /* MEM_STATS */
sys_sem_signal(mem_sem);
return NULL;
}
#else
/**
* Adam's mem_malloc() plus solution for bug #17922
*/
void *
mem_malloc(mem_size_t size)
{
mem_size_t ptr, ptr2;
struct mem *mem, *mem2;
if (size == 0) {
return NULL;
}
/* Expand the size of the allocated memory region so that we can
adjust for alignment. */
if ((size % MEM_ALIGNMENT) != 0) {
size += MEM_ALIGNMENT - ((size + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT);
}
if (size > MEM_SIZE) {
return NULL;
}
sys_sem_wait(mem_sem);
for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE - size; ptr = ((struct mem *)&ram[ptr])->next) {
mem = (struct mem *)&ram[ptr];
if (!mem->used) {
ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
if (mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) >= size) {
/* split large block, create empty remainder */
mem->next = ptr2;
mem->used = 1;
/* create mem2 struct */
mem2 = (struct mem *)&ram[ptr2];
mem2->used = 0;
mem2->next = mem->next;
mem2->prev = ptr;
if (mem2->next != MEM_SIZE) {
((struct mem *)&ram[mem2->next])->prev = ptr2;
}
}
else if (mem->next - (ptr + SIZEOF_STRUCT_MEM) > size) {
/* near fit, no split, no mem2 creation,
round up to mem->next */
ptr2 = mem->next;
mem->used = 1;
}
else if (mem->next - (ptr + SIZEOF_STRUCT_MEM) == size) {
/* exact fit, do not split, no mem2 creation */
mem->next = ptr2;
mem->used = 1;
}
if (mem->used) {
#if MEM_STATS
lwip_stats.mem.used += (size + SIZEOF_STRUCT_MEM);
if (lwip_stats.mem.max < ptr2) {
lwip_stats.mem.max = ptr2;
}
#endif /* MEM_STATS */
if (mem == lfree) {
/* Find next free block after mem */
while (lfree->used && lfree != ram_end) {
lfree = (struct mem *)&ram[lfree->next];
}
LWIP_ASSERT("mem_malloc: !lfree->used", !lfree->used);
}
sys_sem_signal(mem_sem);
LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.",
(mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end);
LWIP_ASSERT("mem_malloc: allocated memory properly aligned.",
(unsigned long)((u8_t *)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0);
return (u8_t *)mem + SIZEOF_STRUCT_MEM;
}
}
}
LWIP_DEBUGF(MEM_DEBUG | 2, ("mem_malloc: could not allocate %"S16_F" bytes\n", (s16_t)size));
#if MEM_STATS
++lwip_stats.mem.err;
#endif /* MEM_STATS */
sys_sem_signal(mem_sem);
return NULL;
}
#endif
#endif /* MEM_LIBC_MALLOC == 0 */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/memp.h"
#include "lwip/pbuf.h"
#include "lwip/udp.h"
#include "lwip/raw.h"
#include "lwip/tcp.h"
#include "lwip/api.h"
#include "lwip/api_msg.h"
#include "lwip/tcpip.h"
#include "lwip/sys.h"
#include "lwip/stats.h"
struct memp {
struct memp *next;
};
#define MEMP_SIZE MEM_ALIGN_SIZE(sizeof(struct memp))
static struct memp *memp_tab[MEMP_MAX];
static const u16_t memp_sizes[MEMP_MAX] = {
MEM_ALIGN_SIZE(sizeof(struct pbuf)),
MEM_ALIGN_SIZE(sizeof(struct raw_pcb)),
MEM_ALIGN_SIZE(sizeof(struct udp_pcb)),
MEM_ALIGN_SIZE(sizeof(struct tcp_pcb)),
MEM_ALIGN_SIZE(sizeof(struct tcp_pcb_listen)),
MEM_ALIGN_SIZE(sizeof(struct tcp_seg)),
MEM_ALIGN_SIZE(sizeof(struct netbuf)),
MEM_ALIGN_SIZE(sizeof(struct netconn)),
MEM_ALIGN_SIZE(sizeof(struct api_msg)),
MEM_ALIGN_SIZE(sizeof(struct tcpip_msg)),
MEM_ALIGN_SIZE(sizeof(struct sys_timeo))
};
static const u16_t memp_num[MEMP_MAX] = {
MEMP_NUM_PBUF,
MEMP_NUM_RAW_PCB,
MEMP_NUM_UDP_PCB,
MEMP_NUM_TCP_PCB,
MEMP_NUM_TCP_PCB_LISTEN,
MEMP_NUM_TCP_SEG,
MEMP_NUM_NETBUF,
MEMP_NUM_NETCONN,
MEMP_NUM_API_MSG,
MEMP_NUM_TCPIP_MSG,
MEMP_NUM_SYS_TIMEOUT
};
#define MEMP_TYPE_SIZE(qty, type) \
((qty) * (MEMP_SIZE + MEM_ALIGN_SIZE(sizeof(type))))
static u8_t memp_memory[MEM_ALIGNMENT - 1 +
MEMP_TYPE_SIZE(MEMP_NUM_PBUF, struct pbuf) +
MEMP_TYPE_SIZE(MEMP_NUM_RAW_PCB, struct raw_pcb) +
MEMP_TYPE_SIZE(MEMP_NUM_UDP_PCB, struct udp_pcb) +
MEMP_TYPE_SIZE(MEMP_NUM_TCP_PCB, struct tcp_pcb) +
MEMP_TYPE_SIZE(MEMP_NUM_TCP_PCB_LISTEN, struct tcp_pcb_listen) +
MEMP_TYPE_SIZE(MEMP_NUM_TCP_SEG, struct tcp_seg) +
MEMP_TYPE_SIZE(MEMP_NUM_NETBUF, struct netbuf) +
MEMP_TYPE_SIZE(MEMP_NUM_NETCONN, struct netconn) +
MEMP_TYPE_SIZE(MEMP_NUM_API_MSG, struct api_msg) +
MEMP_TYPE_SIZE(MEMP_NUM_TCPIP_MSG, struct tcpip_msg) +
MEMP_TYPE_SIZE(MEMP_NUM_SYS_TIMEOUT, struct sys_timeo)];
#if !SYS_LIGHTWEIGHT_PROT
static sys_sem_t mutex;
#endif
#if MEMP_SANITY_CHECK
static int
memp_sanity(void)
{
s16_t i, c;
struct memp *m, *n;
for (i = 0; i < MEMP_MAX; i++) {
for (m = memp_tab[i]; m != NULL; m = m->next) {
c = 1;
for (n = memp_tab[i]; n != NULL; n = n->next) {
if (n == m && --c < 0) {
return 0; /* LW was: abort(); */
}
}
}
}
return 1;
}
#endif /* MEMP_SANITY_CHECK*/
void
memp_init(void)
{
struct memp *memp;
u16_t i, j;
#if MEMP_STATS
for (i = 0; i < MEMP_MAX; ++i) {
lwip_stats.memp[i].used = lwip_stats.memp[i].max =
lwip_stats.memp[i].err = 0;
lwip_stats.memp[i].avail = memp_num[i];
}
#endif /* MEMP_STATS */
memp = MEM_ALIGN(memp_memory);
for (i = 0; i < MEMP_MAX; ++i) {
memp_tab[i] = NULL;
for (j = 0; j < memp_num[i]; ++j) {
memp->next = memp_tab[i];
memp_tab[i] = memp;
memp = (struct memp *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]);
}
}
#if !SYS_LIGHTWEIGHT_PROT
mutex = sys_sem_new(1);
#endif
}
void *
memp_malloc(memp_t type)
{
struct memp *memp;
void *mem;
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_DECL_PROTECT(old_level);
#endif
LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX);
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_PROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_wait(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
memp = memp_tab[type];
if (memp != NULL) {
memp_tab[type] = memp->next;
memp->next = NULL;
#if MEMP_STATS
++lwip_stats.memp[type].used;
if (lwip_stats.memp[type].used > lwip_stats.memp[type].max) {
lwip_stats.memp[type].max = lwip_stats.memp[type].used;
}
#endif /* MEMP_STATS */
mem = (u8_t *)memp + MEMP_SIZE;
LWIP_ASSERT("memp_malloc: memp properly aligned",
((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
} else {
LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %"S16_F"\n", type));
#if MEMP_STATS
++lwip_stats.memp[type].err;
#endif /* MEMP_STATS */
mem = NULL;
}
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_UNPROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_signal(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
return mem;
}
void
memp_free(memp_t type, void *mem)
{
struct memp *memp;
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_DECL_PROTECT(old_level);
#endif /* SYS_LIGHTWEIGHT_PROT */
if (mem == NULL) {
return;
}
memp = (struct memp *)((u8_t *)mem - MEMP_SIZE);
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_PROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_wait(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
#if MEMP_STATS
lwip_stats.memp[type].used--;
#endif /* MEMP_STATS */
memp->next = memp_tab[type];
memp_tab[type] = memp;
#if MEMP_SANITY_CHECK
LWIP_ASSERT("memp sanity", memp_sanity());
#endif
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_UNPROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_signal(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
}

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/**
* @file
*
* lwIP network interface abstraction
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/tcp.h"
#include "lwip/snmp.h"
struct netif *netif_list = NULL;
struct netif *netif_default = NULL;
/**
* Add a network interface to the list of lwIP netifs.
*
* @param netif a pre-allocated netif structure
* @param ipaddr IP address for the new netif
* @param netmask network mask for the new netif
* @param gw default gateway IP address for the new netif
* @param state opaque data passed to the new netif
* @param init callback function that initializes the interface
* @param input callback function that is called to pass
* ingress packets up in the protocol layer stack.
*
* @return netif, or NULL if failed.
*/
struct netif *
netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
struct ip_addr *gw,
void *state,
err_t (* init)(struct netif *netif),
err_t (* input)(struct pbuf *p, struct netif *netif))
{
static s16_t netifnum = 0;
/* reset new interface configuration state */
netif->ip_addr.addr = 0;
netif->netmask.addr = 0;
netif->gw.addr = 0;
netif->flags = 0;
#if LWIP_DHCP
/* netif not under DHCP control by default */
netif->dhcp = NULL;
#endif
/* remember netif specific state information data */
netif->state = state;
netif->num = netifnum++;
netif->input = input;
netif_set_addr(netif, ipaddr, netmask, gw);
/* call user specified initialization function for netif */
if (init(netif) != ERR_OK) {
return NULL;
}
/* add this netif to the list */
netif->next = netif_list;
netif_list = netif;
snmp_inc_iflist();
LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
netif->name[0], netif->name[1]));
ip_addr_debug_print(NETIF_DEBUG, ipaddr);
LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
ip_addr_debug_print(NETIF_DEBUG, netmask);
LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
ip_addr_debug_print(NETIF_DEBUG, gw);
LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
return netif;
}
void
netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask,
struct ip_addr *gw)
{
netif_set_ipaddr(netif, ipaddr);
netif_set_netmask(netif, netmask);
netif_set_gw(netif, gw);
}
void netif_remove(struct netif * netif)
{
if ( netif == NULL ) return;
snmp_delete_ipaddridx_tree(netif);
/* is it the first netif? */
if (netif_list == netif) {
netif_list = netif->next;
snmp_dec_iflist();
}
else {
/* look for netif further down the list */
struct netif * tmpNetif;
for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
if (tmpNetif->next == netif) {
tmpNetif->next = netif->next;
snmp_dec_iflist();
break;
}
}
if (tmpNetif == NULL)
return; /* we didn't find any netif today */
}
/* this netif is default? */
if (netif_default == netif)
/* reset default netif */
netif_default = NULL;
LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
}
struct netif *
netif_find(char *name)
{
struct netif *netif;
u8_t num;
if (name == NULL) {
return NULL;
}
num = name[2] - '0';
for(netif = netif_list; netif != NULL; netif = netif->next) {
if (num == netif->num &&
name[0] == netif->name[0] &&
name[1] == netif->name[1]) {
LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
return netif;
}
}
LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
return NULL;
}
void
netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
{
/* TODO: Handling of obsolete pcbs */
/* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
#if LWIP_TCP
struct tcp_pcb *pcb;
struct tcp_pcb_listen *lpcb;
/* address is actually being changed? */
if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0)
{
/* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: netif address being changed\n"));
pcb = tcp_active_pcbs;
while (pcb != NULL) {
/* PCB bound to current local interface address? */
if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) {
/* this connection must be aborted */
struct tcp_pcb *next = pcb->next;
LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
tcp_abort(pcb);
pcb = next;
} else {
pcb = pcb->next;
}
}
for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
/* PCB bound to current local interface address? */
if (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr))) {
/* The PCB is listening to the old ipaddr and
* is set to listen to the new one instead */
ip_addr_set(&(lpcb->local_ip), ipaddr);
}
}
}
#endif
snmp_delete_ipaddridx_tree(netif);
snmp_delete_iprteidx_tree(0,netif);
/* set new IP address to netif */
ip_addr_set(&(netif->ip_addr), ipaddr);
snmp_insert_ipaddridx_tree(netif);
snmp_insert_iprteidx_tree(0,netif);
#if 0 /* only allowed for Ethernet interfaces TODO: how can we check? */
/** For Ethernet network interfaces, we would like to send a
* "gratuitous ARP"; this is an ARP packet sent by a node in order
* to spontaneously cause other nodes to update an entry in their
* ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
*/
etharp_query(netif, ipaddr, NULL);
#endif
LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
netif->name[0], netif->name[1],
ip4_addr1(&netif->ip_addr),
ip4_addr2(&netif->ip_addr),
ip4_addr3(&netif->ip_addr),
ip4_addr4(&netif->ip_addr)));
}
void
netif_set_gw(struct netif *netif, struct ip_addr *gw)
{
ip_addr_set(&(netif->gw), gw);
LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
netif->name[0], netif->name[1],
ip4_addr1(&netif->gw),
ip4_addr2(&netif->gw),
ip4_addr3(&netif->gw),
ip4_addr4(&netif->gw)));
}
void
netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
{
snmp_delete_iprteidx_tree(0, netif);
/* set new netmask to netif */
ip_addr_set(&(netif->netmask), netmask);
snmp_insert_iprteidx_tree(0, netif);
LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
netif->name[0], netif->name[1],
ip4_addr1(&netif->netmask),
ip4_addr2(&netif->netmask),
ip4_addr3(&netif->netmask),
ip4_addr4(&netif->netmask)));
}
void
netif_set_default(struct netif *netif)
{
if (netif == NULL)
{
/* remove default route */
snmp_delete_iprteidx_tree(1, netif);
}
else
{
/* install default route */
snmp_insert_iprteidx_tree(1, netif);
}
netif_default = netif;
LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
}
/**
* Bring an interface up, available for processing
* traffic.
*
* @note: Enabling DHCP on a down interface will make it come
* up once configured.
*
* @see dhcp_start()
*/
void netif_set_up(struct netif *netif)
{
netif->flags |= NETIF_FLAG_UP;
#if LWIP_SNMP
snmp_get_sysuptime(&netif->ts);
#endif
}
/**
* Ask if an interface is up
*/
u8_t netif_is_up(struct netif *netif)
{
return (netif->flags & NETIF_FLAG_UP)?1:0;
}
/**
* Bring an interface down, disabling any traffic processing.
*
* @note: Enabling DHCP on a down interface will make it come
* up once configured.
*
* @see dhcp_start()
*/
void netif_set_down(struct netif *netif)
{
netif->flags &= ~NETIF_FLAG_UP;
#if LWIP_SNMP
snmp_get_sysuptime(&netif->ts);
#endif
}
void
netif_init(void)
{
netif_list = netif_default = NULL;
}

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/**
* @file
* Packet buffer management
*
* Packets are built from the pbuf data structure. It supports dynamic
* memory allocation for packet contents or can reference externally
* managed packet contents both in RAM and ROM. Quick allocation for
* incoming packets is provided through pools with fixed sized pbufs.
*
* A packet may span over multiple pbufs, chained as a singly linked
* list. This is called a "pbuf chain".
*
* Multiple packets may be queued, also using this singly linked list.
* This is called a "packet queue".
*
* So, a packet queue consists of one or more pbuf chains, each of
* which consist of one or more pbufs. Currently, queues are only
* supported in a limited section of lwIP, this is the etharp queueing
* code. Outside of this section no packet queues are supported yet.
*
* The differences between a pbuf chain and a packet queue are very
* precise but subtle.
*
* The last pbuf of a packet has a ->tot_len field that equals the
* ->len field. It can be found by traversing the list. If the last
* pbuf of a packet has a ->next field other than NULL, more packets
* are on the queue.
*
* Therefore, looping through a pbuf of a single packet, has an
* loop end condition (tot_len == p->len), NOT (next == NULL).
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <string.h>
#include "lwip/opt.h"
#include "lwip/stats.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include "arch/perf.h"
static u8_t pbuf_pool_memory[MEM_ALIGNMENT - 1 + PBUF_POOL_SIZE * MEM_ALIGN_SIZE(PBUF_POOL_BUFSIZE + sizeof(struct pbuf))];
#if !SYS_LIGHTWEIGHT_PROT
static volatile u8_t pbuf_pool_free_lock, pbuf_pool_alloc_lock;
static sys_sem_t pbuf_pool_free_sem;
#endif
static struct pbuf *pbuf_pool = NULL;
/**
* Initializes the pbuf module.
*
* A large part of memory is allocated for holding the pool of pbufs.
* The size of the individual pbufs in the pool is given by the size
* parameter, and the number of pbufs in the pool by the num parameter.
*
* After the memory has been allocated, the pbufs are set up. The
* ->next pointer in each pbuf is set up to point to the next pbuf in
* the pool.
*
*/
void
pbuf_init(void)
{
struct pbuf *p, *q = NULL;
u16_t i;
pbuf_pool = (struct pbuf *)MEM_ALIGN(pbuf_pool_memory);
#if PBUF_STATS
lwip_stats.pbuf.avail = PBUF_POOL_SIZE;
#endif /* PBUF_STATS */
/* Set up ->next pointers to link the pbufs of the pool together */
p = pbuf_pool;
for(i = 0; i < PBUF_POOL_SIZE; ++i) {
p->next = (struct pbuf *)((u8_t *)p + PBUF_POOL_BUFSIZE + sizeof(struct pbuf));
p->len = p->tot_len = PBUF_POOL_BUFSIZE;
p->payload = MEM_ALIGN((void *)((u8_t *)p + sizeof(struct pbuf)));
p->flags = PBUF_FLAG_POOL;
q = p;
p = p->next;
}
/* The ->next pointer of last pbuf is NULL to indicate that there
are no more pbufs in the pool */
q->next = NULL;
#if !SYS_LIGHTWEIGHT_PROT
pbuf_pool_alloc_lock = 0;
pbuf_pool_free_lock = 0;
pbuf_pool_free_sem = sys_sem_new(1);
#endif
}
/**
* @internal only called from pbuf_alloc()
*/
static struct pbuf *
pbuf_pool_alloc(void)
{
struct pbuf *p = NULL;
SYS_ARCH_DECL_PROTECT(old_level);
SYS_ARCH_PROTECT(old_level);
#if !SYS_LIGHTWEIGHT_PROT
/* Next, check the actual pbuf pool, but if the pool is locked, we
pretend to be out of buffers and return NULL. */
if (pbuf_pool_free_lock) {
#if PBUF_STATS
++lwip_stats.pbuf.alloc_locked;
#endif /* PBUF_STATS */
return NULL;
}
pbuf_pool_alloc_lock = 1;
if (!pbuf_pool_free_lock) {
#endif /* SYS_LIGHTWEIGHT_PROT */
p = pbuf_pool;
if (p) {
pbuf_pool = p->next;
}
#if !SYS_LIGHTWEIGHT_PROT
#if PBUF_STATS
} else {
++lwip_stats.pbuf.alloc_locked;
#endif /* PBUF_STATS */
}
pbuf_pool_alloc_lock = 0;
#endif /* SYS_LIGHTWEIGHT_PROT */
#if PBUF_STATS
if (p != NULL) {
++lwip_stats.pbuf.used;
if (lwip_stats.pbuf.used > lwip_stats.pbuf.max) {
lwip_stats.pbuf.max = lwip_stats.pbuf.used;
}
}
#endif /* PBUF_STATS */
SYS_ARCH_UNPROTECT(old_level);
return p;
}
/**
* Allocates a pbuf of the given type (possibly a chain for PBUF_POOL type).
*
* The actual memory allocated for the pbuf is determined by the
* layer at which the pbuf is allocated and the requested size
* (from the size parameter).
*
* @param flag this parameter decides how and where the pbuf
* should be allocated as follows:
*
* - PBUF_RAM: buffer memory for pbuf is allocated as one large
* chunk. This includes protocol headers as well.
* - PBUF_ROM: no buffer memory is allocated for the pbuf, even for
* protocol headers. Additional headers must be prepended
* by allocating another pbuf and chain in to the front of
* the ROM pbuf. It is assumed that the memory used is really
* similar to ROM in that it is immutable and will not be
* changed. Memory which is dynamic should generally not
* be attached to PBUF_ROM pbufs. Use PBUF_REF instead.
* - PBUF_REF: no buffer memory is allocated for the pbuf, even for
* protocol headers. It is assumed that the pbuf is only
* being used in a single thread. If the pbuf gets queued,
* then pbuf_take should be called to copy the buffer.
* - PBUF_POOL: the pbuf is allocated as a pbuf chain, with pbufs from
* the pbuf pool that is allocated during pbuf_init().
*
* @return the allocated pbuf. If multiple pbufs where allocated, this
* is the first pbuf of a pbuf chain.
*/
struct pbuf *
pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
{
struct pbuf *p, *q, *r;
u16_t offset;
s32_t rem_len; /* remaining length */
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_alloc(length=%"U16_F")\n", length));
/* determine header offset */
offset = 0;
switch (l) {
case PBUF_TRANSPORT:
/* add room for transport (often TCP) layer header */
offset += PBUF_TRANSPORT_HLEN;
/* FALLTHROUGH */
case PBUF_IP:
/* add room for IP layer header */
offset += PBUF_IP_HLEN;
/* FALLTHROUGH */
case PBUF_LINK:
/* add room for link layer header */
offset += PBUF_LINK_HLEN;
break;
case PBUF_RAW:
break;
default:
LWIP_ASSERT("pbuf_alloc: bad pbuf layer", 0);
return NULL;
}
switch (flag) {
case PBUF_POOL:
/* allocate head of pbuf chain into p */
p = pbuf_pool_alloc();
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_alloc: allocated pbuf %p\n", (void *)p));
if (p == NULL) {
#if PBUF_STATS
++lwip_stats.pbuf.err;
#endif /* PBUF_STATS */
return NULL;
}
p->next = NULL;
/* make the payload pointer point 'offset' bytes into pbuf data memory */
p->payload = MEM_ALIGN((void *)((u8_t *)p + (sizeof(struct pbuf) + offset)));
LWIP_ASSERT("pbuf_alloc: pbuf p->payload properly aligned",
((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
/* the total length of the pbuf chain is the requested size */
p->tot_len = length;
/* set the length of the first pbuf in the chain */
p->len = length > PBUF_POOL_BUFSIZE - offset? PBUF_POOL_BUFSIZE - offset: length;
/* set reference count (needed here in case we fail) */
p->ref = 1;
/* now allocate the tail of the pbuf chain */
/* remember first pbuf for linkage in next iteration */
r = p;
/* remaining length to be allocated */
rem_len = length - p->len;
/* any remaining pbufs to be allocated? */
while (rem_len > 0) {
q = pbuf_pool_alloc();
if (q == NULL) {
LWIP_DEBUGF(PBUF_DEBUG | 2, ("pbuf_alloc: Out of pbufs in pool.\n"));
#if PBUF_STATS
++lwip_stats.pbuf.err;
#endif /* PBUF_STATS */
/* free chain so far allocated */
pbuf_free(p);
/* bail out unsuccesfully */
return NULL;
}
q->next = NULL;
/* make previous pbuf point to this pbuf */
r->next = q;
/* set total length of this pbuf and next in chain */
q->tot_len = rem_len;
/* this pbuf length is pool size, unless smaller sized tail */
q->len = rem_len > PBUF_POOL_BUFSIZE? PBUF_POOL_BUFSIZE: rem_len;
q->payload = (void *)((u8_t *)q + sizeof(struct pbuf));
LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned",
((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0);
q->ref = 1;
/* calculate remaining length to be allocated */
rem_len -= q->len;
/* remember this pbuf for linkage in next iteration */
r = q;
}
/* end of chain */
/*r->next = NULL;*/
break;
case PBUF_RAM:
/* If pbuf is to be allocated in RAM, allocate memory for it. */
p = mem_malloc(MEM_ALIGN_SIZE(sizeof(struct pbuf) + offset) + MEM_ALIGN_SIZE(length));
if (p == NULL) {
return NULL;
}
/* Set up internal structure of the pbuf. */
p->payload = MEM_ALIGN((void *)((u8_t *)p + sizeof(struct pbuf) + offset));
p->len = p->tot_len = length;
p->next = NULL;
p->flags = PBUF_FLAG_RAM;
LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned",
((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
break;
/* pbuf references existing (non-volatile static constant) ROM payload? */
case PBUF_ROM:
/* pbuf references existing (externally allocated) RAM payload? */
case PBUF_REF:
/* only allocate memory for the pbuf structure */
p = memp_malloc(MEMP_PBUF);
if (p == NULL) {
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_alloc: Could not allocate MEMP_PBUF for PBUF_%s.\n", flag == PBUF_ROM?"ROM":"REF"));
return NULL;
}
/* caller must set this field properly, afterwards */
p->payload = NULL;
p->len = p->tot_len = length;
p->next = NULL;
p->flags = (flag == PBUF_ROM? PBUF_FLAG_ROM: PBUF_FLAG_REF);
break;
default:
LWIP_ASSERT("pbuf_alloc: erroneous flag", 0);
return NULL;
}
/* set reference count */
p->ref = 1;
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_alloc(length=%"U16_F") == %p\n", length, (void *)p));
return p;
}
#if PBUF_STATS
#define DEC_PBUF_STATS do { --lwip_stats.pbuf.used; } while (0)
#else /* PBUF_STATS */
#define DEC_PBUF_STATS
#endif /* PBUF_STATS */
#define PBUF_POOL_FAST_FREE(p) do { \
p->next = pbuf_pool; \
pbuf_pool = p; \
DEC_PBUF_STATS; \
} while (0)
#if SYS_LIGHTWEIGHT_PROT
#define PBUF_POOL_FREE(p) do { \
SYS_ARCH_DECL_PROTECT(old_level); \
SYS_ARCH_PROTECT(old_level); \
PBUF_POOL_FAST_FREE(p); \
SYS_ARCH_UNPROTECT(old_level); \
} while (0)
#else /* SYS_LIGHTWEIGHT_PROT */
#define PBUF_POOL_FREE(p) do { \
sys_sem_wait(pbuf_pool_free_sem); \
PBUF_POOL_FAST_FREE(p); \
sys_sem_signal(pbuf_pool_free_sem); \
} while (0)
#endif /* SYS_LIGHTWEIGHT_PROT */
/**
* Shrink a pbuf chain to a desired length.
*
* @param p pbuf to shrink.
* @param new_len desired new length of pbuf chain
*
* Depending on the desired length, the first few pbufs in a chain might
* be skipped and left unchanged. The new last pbuf in the chain will be
* resized, and any remaining pbufs will be freed.
*
* @note If the pbuf is ROM/REF, only the ->tot_len and ->len fields are adjusted.
* @note May not be called on a packet queue.
*
* @bug Cannot grow the size of a pbuf (chain) (yet).
*/
void
pbuf_realloc(struct pbuf *p, u16_t new_len)
{
struct pbuf *q;
u16_t rem_len; /* remaining length */
s16_t grow;
LWIP_ASSERT("pbuf_realloc: sane p->flags", p->flags == PBUF_FLAG_POOL ||
p->flags == PBUF_FLAG_ROM ||
p->flags == PBUF_FLAG_RAM ||
p->flags == PBUF_FLAG_REF);
/* desired length larger than current length? */
if (new_len >= p->tot_len) {
/* enlarging not yet supported */
return;
}
/* the pbuf chain grows by (new_len - p->tot_len) bytes
* (which may be negative in case of shrinking) */
grow = new_len - p->tot_len;
/* first, step over any pbufs that should remain in the chain */
rem_len = new_len;
q = p;
/* should this pbuf be kept? */
while (rem_len > q->len) {
/* decrease remaining length by pbuf length */
rem_len -= q->len;
/* decrease total length indicator */
q->tot_len += grow;
/* proceed to next pbuf in chain */
q = q->next;
}
/* we have now reached the new last pbuf (in q) */
/* rem_len == desired length for pbuf q */
/* shrink allocated memory for PBUF_RAM */
/* (other types merely adjust their length fields */
if ((q->flags == PBUF_FLAG_RAM) && (rem_len != q->len)) {
/* reallocate and adjust the length of the pbuf that will be split */
mem_realloc(q, (u8_t *)q->payload - (u8_t *)q + rem_len);
}
/* adjust length fields for new last pbuf */
q->len = rem_len;
q->tot_len = q->len;
/* any remaining pbufs in chain? */
if (q->next != NULL) {
/* free remaining pbufs in chain */
pbuf_free(q->next);
}
/* q is last packet in chain */
q->next = NULL;
}
/**
* Adjusts the payload pointer to hide or reveal headers in the payload.
*
* Adjusts the ->payload pointer so that space for a header
* (dis)appears in the pbuf payload.
*
* The ->payload, ->tot_len and ->len fields are adjusted.
*
* @param hdr_size_inc Number of bytes to increment header size which
* increases the size of the pbuf. New space is on the front.
* (Using a negative value decreases the header size.)
* If hdr_size_inc is 0, this function does nothing and returns succesful.
*
* PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so
* the call will fail. A check is made that the increase in header size does
* not move the payload pointer in front of the start of the buffer.
* @return non-zero on failure, zero on success.
*
*/
u8_t
pbuf_header(struct pbuf *p, s16_t header_size_increment)
{
u16_t flags;
void *payload;
LWIP_ASSERT("p != NULL", p != NULL);
if ((header_size_increment == 0) || (p == NULL)) return 0;
flags = p->flags;
/* remember current payload pointer */
payload = p->payload;
/* pbuf types containing payloads? */
if (flags == PBUF_FLAG_RAM || flags == PBUF_FLAG_POOL) {
/* set new payload pointer */
p->payload = (u8_t *)p->payload - header_size_increment;
/* boundary check fails? */
if ((u8_t *)p->payload < (u8_t *)p + sizeof(struct pbuf)) {
LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_header: failed as %p < %p (not enough space for new header size)\n",
(void *)p->payload,
(void *)(p + 1)));\
/* restore old payload pointer */
p->payload = payload;
/* bail out unsuccesfully */
return 1;
}
/* pbuf types refering to external payloads? */
} else if (flags == PBUF_FLAG_REF || flags == PBUF_FLAG_ROM) {
/* hide a header in the payload? */
if ((header_size_increment < 0) && (header_size_increment - p->len <= 0)) {
/* increase payload pointer */
p->payload = (u8_t *)p->payload - header_size_increment;
} else {
/* cannot expand payload to front (yet!)
* bail out unsuccesfully */
return 1;
}
}
/* modify pbuf length fields */
p->len += header_size_increment;
p->tot_len += header_size_increment;
LWIP_DEBUGF( PBUF_DEBUG, ("pbuf_header: old %p new %p (%"S16_F")\n",
(void *)payload, (void *)p->payload, header_size_increment));
return 0;
}
/**
* Dereference a pbuf chain or queue and deallocate any no-longer-used
* pbufs at the head of this chain or queue.
*
* Decrements the pbuf reference count. If it reaches zero, the pbuf is
* deallocated.
*
* For a pbuf chain, this is repeated for each pbuf in the chain,
* up to the first pbuf which has a non-zero reference count after
* decrementing. So, when all reference counts are one, the whole
* chain is free'd.
*
* @param pbuf The pbuf (chain) to be dereferenced.
*
* @return the number of pbufs that were de-allocated
* from the head of the chain.
*
* @note MUST NOT be called on a packet queue (Not verified to work yet).
* @note the reference counter of a pbuf equals the number of pointers
* that refer to the pbuf (or into the pbuf).
*
* @internal examples:
*
* Assuming existing chains a->b->c with the following reference
* counts, calling pbuf_free(a) results in:
*
* 1->2->3 becomes ...1->3
* 3->3->3 becomes 2->3->3
* 1->1->2 becomes ......1
* 2->1->1 becomes 1->1->1
* 1->1->1 becomes .......
*
*/
u8_t
pbuf_free(struct pbuf *p)
{
u16_t flags;
struct pbuf *q;
u8_t count;
SYS_ARCH_DECL_PROTECT(old_level);
LWIP_ASSERT("p != NULL", p != NULL);
/* if assertions are disabled, proceed with debug output */
if (p == NULL) {
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_free(p == NULL) was called.\n"));
return 0;
}
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_free(%p)\n", (void *)p));
PERF_START;
LWIP_ASSERT("pbuf_free: sane flags",
p->flags == PBUF_FLAG_RAM || p->flags == PBUF_FLAG_ROM ||
p->flags == PBUF_FLAG_REF || p->flags == PBUF_FLAG_POOL);
count = 0;
/* Since decrementing ref cannot be guaranteed to be a single machine operation
* we must protect it. Also, the later test of ref must be protected.
*/
SYS_ARCH_PROTECT(old_level);
/* de-allocate all consecutive pbufs from the head of the chain that
* obtain a zero reference count after decrementing*/
while (p != NULL) {
/* all pbufs in a chain are referenced at least once */
LWIP_ASSERT("pbuf_free: p->ref > 0", p->ref > 0);
/* decrease reference count (number of pointers to pbuf) */
p->ref--;
/* this pbuf is no longer referenced to? */
if (p->ref == 0) {
/* remember next pbuf in chain for next iteration */
q = p->next;
LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_free: deallocating %p\n", (void *)p));
flags = p->flags;
/* is this a pbuf from the pool? */
if (flags == PBUF_FLAG_POOL) {
p->len = p->tot_len = PBUF_POOL_BUFSIZE;
p->payload = (void *)((u8_t *)p + sizeof(struct pbuf));
PBUF_POOL_FREE(p);
/* is this a ROM or RAM referencing pbuf? */
} else if (flags == PBUF_FLAG_ROM || flags == PBUF_FLAG_REF) {
memp_free(MEMP_PBUF, p);
/* flags == PBUF_FLAG_RAM */
} else {
mem_free(p);
}
count++;
/* proceed to next pbuf */
p = q;
/* p->ref > 0, this pbuf is still referenced to */
/* (and so the remaining pbufs in chain as well) */
} else {
LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_free: %p has ref %"U16_F", ending here.\n", (void *)p, (u16_t)p->ref));
/* stop walking through the chain */
p = NULL;
}
}
SYS_ARCH_UNPROTECT(old_level);
PERF_STOP("pbuf_free");
/* return number of de-allocated pbufs */
return count;
}
/**
* Count number of pbufs in a chain
*
* @param p first pbuf of chain
* @return the number of pbufs in a chain
*/
u8_t
pbuf_clen(struct pbuf *p)
{
u8_t len;
len = 0;
while (p != NULL) {
++len;
p = p->next;
}
return len;
}
/**
* Increment the reference count of the pbuf.
*
* @param p pbuf to increase reference counter of
*
*/
void
pbuf_ref(struct pbuf *p)
{
SYS_ARCH_DECL_PROTECT(old_level);
/* pbuf given? */
if (p != NULL) {
SYS_ARCH_PROTECT(old_level);
++(p->ref);
SYS_ARCH_UNPROTECT(old_level);
}
}
/**
* Concatenate two pbufs (each may be a pbuf chain) and take over
* the caller's reference of the tail pbuf.
*
* @note The caller MAY NOT reference the tail pbuf afterwards.
* Use pbuf_chain() for that purpose.
*
* @see pbuf_chain()
*/
void
pbuf_cat(struct pbuf *h, struct pbuf *t)
{
struct pbuf *p;
LWIP_ASSERT("h != NULL (programmer violates API)", h != NULL);
LWIP_ASSERT("t != NULL (programmer violates API)", t != NULL);
if ((h == NULL) || (t == NULL)) return;
/* proceed to last pbuf of chain */
for (p = h; p->next != NULL; p = p->next) {
/* add total length of second chain to all totals of first chain */
p->tot_len += t->tot_len;
}
/* { p is last pbuf of first h chain, p->next == NULL } */
LWIP_ASSERT("p->tot_len == p->len (of last pbuf in chain)", p->tot_len == p->len);
LWIP_ASSERT("p->next == NULL", p->next == NULL);
/* add total length of second chain to last pbuf total of first chain */
p->tot_len += t->tot_len;
/* chain last pbuf of head (p) with first of tail (t) */
p->next = t;
/* p->next now references t, but the caller will drop its reference to t,
* so netto there is no change to the reference count of t.
*/
}
/**
* Chain two pbufs (or pbuf chains) together.
*
* The caller MUST call pbuf_free(t) once it has stopped
* using it. Use pbuf_cat() instead if you no longer use t.
*
* @param h head pbuf (chain)
* @param t tail pbuf (chain)
* @note The pbufs MUST belong to the same packet.
* @note MAY NOT be called on a packet queue.
*
* The ->tot_len fields of all pbufs of the head chain are adjusted.
* The ->next field of the last pbuf of the head chain is adjusted.
* The ->ref field of the first pbuf of the tail chain is adjusted.
*
*/
void
pbuf_chain(struct pbuf *h, struct pbuf *t)
{
pbuf_cat(h, t);
/* t is now referenced by h */
pbuf_ref(t);
LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_chain: %p references %p\n", (void *)h, (void *)t));
}
/* For packet queueing. Note that queued packets MUST be dequeued first
* using pbuf_dequeue() before calling other pbuf_() functions. */
#if ARP_QUEUEING
/**
* Add a packet to the end of a queue.
*
* @param q pointer to first packet on the queue
* @param n packet to be queued
*
* Both packets MUST be given, and must be different.
*/
void
pbuf_queue(struct pbuf *p, struct pbuf *n)
{
#if PBUF_DEBUG /* remember head of queue */
struct pbuf *q = p;
#endif
/* programmer stupidity checks */
LWIP_ASSERT("p == NULL in pbuf_queue: this indicates a programmer error\n", p != NULL);
LWIP_ASSERT("n == NULL in pbuf_queue: this indicates a programmer error\n", n != NULL);
LWIP_ASSERT("p == n in pbuf_queue: this indicates a programmer error\n", p != n);
if ((p == NULL) || (n == NULL) || (p == n)){
LWIP_DEBUGF(PBUF_DEBUG | DBG_HALT | 3, ("pbuf_queue: programmer argument error\n"));
return;
}
/* iterate through all packets on queue */
while (p->next != NULL) {
/* be very picky about pbuf chain correctness */
#if PBUF_DEBUG
/* iterate through all pbufs in packet */
while (p->tot_len != p->len) {
/* make sure invariant condition holds */
LWIP_ASSERT("p->len < p->tot_len", p->len < p->tot_len);
/* make sure each packet is complete */
LWIP_ASSERT("p->next != NULL", p->next != NULL);
p = p->next;
/* { p->tot_len == p->len => p is last pbuf of a packet } */
}
/* { p is last pbuf of a packet } */
/* proceed to next packet on queue */
#endif
/* proceed to next pbuf */
if (p->next != NULL) p = p->next;
}
/* { p->tot_len == p->len and p->next == NULL } ==>
* { p is last pbuf of last packet on queue } */
/* chain last pbuf of queue with n */
p->next = n;
/* n is now referenced to by the (packet p in the) queue */
pbuf_ref(n);
#if PBUF_DEBUG
LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2,
("pbuf_queue: newly queued packet %p sits after packet %p in queue %p\n",
(void *)n, (void *)p, (void *)q));
#endif
}
/**
* Remove a packet from the head of a queue.
*
* The caller MUST reference the remainder of the queue (as returned). The
* caller MUST NOT call pbuf_ref() as it implicitly takes over the reference
* from p.
*
* @param p pointer to first packet on the queue which will be dequeued.
* @return first packet on the remaining queue (NULL if no further packets).
*
*/
struct pbuf *
pbuf_dequeue(struct pbuf *p)
{
struct pbuf *q;
LWIP_ASSERT("p != NULL", p != NULL);
/* iterate through all pbufs in packet p */
while (p->tot_len != p->len) {
/* make sure invariant condition holds */
LWIP_ASSERT("p->len < p->tot_len", p->len < p->tot_len);
/* make sure each packet is complete */
LWIP_ASSERT("p->next != NULL", p->next != NULL);
p = p->next;
}
/* { p->tot_len == p->len } => p is the last pbuf of the first packet */
/* remember next packet on queue in q */
q = p->next;
/* dequeue packet p from queue */
p->next = NULL;
/* any next packet on queue? */
if (q != NULL) {
/* although q is no longer referenced by p, it MUST be referenced by
* the caller, who is maintaining this packet queue. So, we do not call
* pbuf_free(q) here, resulting in an implicit pbuf_ref(q) for the caller. */
LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_dequeue: first remaining packet on queue is %p\n", (void *)q));
} else {
LWIP_DEBUGF(PBUF_DEBUG | DBG_FRESH | 2, ("pbuf_dequeue: no further packets on queue\n"));
}
return q;
}
#endif
/**
*
* Create PBUF_POOL (or PBUF_RAM) copies of PBUF_REF pbufs.
*
* Used to queue packets on behalf of the lwIP stack, such as
* ARP based queueing.
*
* Go through a pbuf chain and replace any PBUF_REF buffers
* with PBUF_POOL (or PBUF_RAM) pbufs, each taking a copy of
* the referenced data.
*
* @note You MUST explicitly use p = pbuf_take(p);
* The pbuf you give as argument, may have been replaced
* by a (differently located) copy through pbuf_take()!
*
* @note Any replaced pbufs will be freed through pbuf_free().
* This may deallocate them if they become no longer referenced.
*
* @param p Head of pbuf chain to process
*
* @return Pointer to head of pbuf chain
*/
struct pbuf *
pbuf_take(struct pbuf *p)
{
struct pbuf *q , *prev, *head;
LWIP_ASSERT("pbuf_take: p != NULL\n", p != NULL);
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 3, ("pbuf_take(%p)\n", (void*)p));
prev = NULL;
head = p;
/* iterate through pbuf chain */
do
{
/* pbuf is of type PBUF_REF? */
if (p->flags == PBUF_FLAG_REF) {
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE, ("pbuf_take: encountered PBUF_REF %p\n", (void *)p));
/* allocate a pbuf (w/ payload) fully in RAM */
/* PBUF_POOL buffers are faster if we can use them */
if (p->len <= PBUF_POOL_BUFSIZE) {
q = pbuf_alloc(PBUF_RAW, p->len, PBUF_POOL);
if (q == NULL) {
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_take: Could not allocate PBUF_POOL\n"));
}
} else {
/* no replacement pbuf yet */
q = NULL;
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_take: PBUF_POOL too small to replace PBUF_REF\n"));
}
/* no (large enough) PBUF_POOL was available? retry with PBUF_RAM */
if (q == NULL) {
q = pbuf_alloc(PBUF_RAW, p->len, PBUF_RAM);
if (q == NULL) {
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_take: Could not allocate PBUF_RAM\n"));
}
}
/* replacement pbuf could be allocated? */
if (q != NULL)
{
/* copy p to q */
/* copy successor */
q->next = p->next;
/* remove linkage from original pbuf */
p->next = NULL;
/* remove linkage to original pbuf */
if (prev != NULL) {
/* prev->next == p at this point */
LWIP_ASSERT("prev->next == p", prev->next == p);
/* break chain and insert new pbuf instead */
prev->next = q;
/* prev == NULL, so we replaced the head pbuf of the chain */
} else {
head = q;
}
/* copy pbuf payload */
memcpy(q->payload, p->payload, p->len);
q->tot_len = p->tot_len;
q->len = p->len;
/* in case p was the first pbuf, it is no longer refered to by
* our caller, as the caller MUST do p = pbuf_take(p);
* in case p was not the first pbuf, it is no longer refered to
* by prev. we can safely free the pbuf here.
* (note that we have set p->next to NULL already so that
* we will not free the rest of the chain by accident.)
*/
pbuf_free(p);
/* do not copy ref, since someone else might be using the old buffer */
LWIP_DEBUGF(PBUF_DEBUG, ("pbuf_take: replaced PBUF_REF %p with %p\n", (void *)p, (void *)q));
p = q;
} else {
/* deallocate chain */
pbuf_free(head);
LWIP_DEBUGF(PBUF_DEBUG | 2, ("pbuf_take: failed to allocate replacement pbuf for %p\n", (void *)p));
return NULL;
}
/* p->flags != PBUF_FLAG_REF */
} else {
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 1, ("pbuf_take: skipping pbuf not of type PBUF_REF\n"));
}
/* remember this pbuf */
prev = p;
/* proceed to next pbuf in original chain */
p = p->next;
} while (p);
LWIP_DEBUGF(PBUF_DEBUG | DBG_TRACE | 1, ("pbuf_take: end of chain reached.\n"));
return head;
}
/**
* Dechains the first pbuf from its succeeding pbufs in the chain.
*
* Makes p->tot_len field equal to p->len.
* @param p pbuf to dechain
* @return remainder of the pbuf chain, or NULL if it was de-allocated.
* @note May not be called on a packet queue.
*/
struct pbuf *
pbuf_dechain(struct pbuf *p)
{
struct pbuf *q;
u8_t tail_gone = 1;
/* tail */
q = p->next;
/* pbuf has successor in chain? */
if (q != NULL) {
/* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */
LWIP_ASSERT("p->tot_len == p->len + q->tot_len", q->tot_len == p->tot_len - p->len);
/* enforce invariant if assertion is disabled */
q->tot_len = p->tot_len - p->len;
/* decouple pbuf from remainder */
p->next = NULL;
/* total length of pbuf p is its own length only */
p->tot_len = p->len;
/* q is no longer referenced by p, free it */
LWIP_DEBUGF(PBUF_DEBUG | DBG_STATE, ("pbuf_dechain: unreferencing %p\n", (void *)q));
tail_gone = pbuf_free(q);
if (tail_gone > 0) {
LWIP_DEBUGF(PBUF_DEBUG | DBG_STATE,
("pbuf_dechain: deallocated %p (as it is no longer referenced)\n", (void *)q));
}
/* return remaining tail or NULL if deallocated */
}
/* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */
LWIP_ASSERT("p->tot_len == p->len", p->tot_len == p->len);
return (tail_gone > 0? NULL: q);
}

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@ -0,0 +1,326 @@
/**
* @file
*
* Implementation of raw protocol PCBs for low-level handling of
* different types of protocols besides (or overriding) those
* already available in lwIP.
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <string.h>
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/memp.h"
#include "lwip/inet.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/raw.h"
#include "lwip/stats.h"
#include "arch/perf.h"
#include "lwip/snmp.h"
#if LWIP_RAW
/** The list of RAW PCBs */
static struct raw_pcb *raw_pcbs = NULL;
void
raw_init(void)
{
raw_pcbs = NULL;
}
/**
* Determine if in incoming IP packet is covered by a RAW PCB
* and if so, pass it to a user-provided receive callback function.
*
* Given an incoming IP datagram (as a chain of pbufs) this function
* finds a corresponding RAW PCB and calls the corresponding receive
* callback function.
*
* @param pbuf pbuf to be demultiplexed to a RAW PCB.
* @param netif network interface on which the datagram was received.
* @Return - 1 if the packet has been eaten by a RAW PCB receive
* callback function. The caller MAY NOT not reference the
* packet any longer, and MAY NOT call pbuf_free().
* @return - 0 if packet is not eaten (pbuf is still referenced by the
* caller).
*
*/
u8_t
raw_input(struct pbuf *p, struct netif *inp)
{
struct raw_pcb *pcb;
struct ip_hdr *iphdr;
s16_t proto;
u8_t eaten = 0;
iphdr = p->payload;
proto = IPH_PROTO(iphdr);
pcb = raw_pcbs;
/* loop through all raw pcbs until the packet is eaten by one */
/* this allows multiple pcbs to match against the packet by design */
while ((eaten == 0) && (pcb != NULL)) {
if (pcb->protocol == proto) {
/* receive callback function available? */
if (pcb->recv != NULL) {
/* the receive callback function did not eat the packet? */
if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0)
{
/* receive function ate the packet */
p = NULL;
eaten = 1;
}
}
/* no receive callback function was set for this raw PCB */
/* drop the packet */
}
pcb = pcb->next;
}
return eaten;
}
/**
* Bind a RAW PCB.
*
* @param pcb RAW PCB to be bound with a local address ipaddr.
* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
* bind to all local interfaces.
*
* @return lwIP error code.
* - ERR_OK. Successful. No error occured.
* - ERR_USE. The specified IP address is already bound to by
* another RAW PCB.
*
* @see raw_disconnect()
*/
err_t
raw_bind(struct raw_pcb *pcb, struct ip_addr *ipaddr)
{
ip_addr_set(&pcb->local_ip, ipaddr);
return ERR_OK;
}
/**
* Connect an RAW PCB. This function is required by upper layers
* of lwip. Using the raw api you could use raw_sendto() instead
*
* This will associate the RAW PCB with the remote address.
*
* @param pcb RAW PCB to be connected with remote address ipaddr and port.
* @param ipaddr remote IP address to connect with.
*
* @return lwIP error code
*
* @see raw_disconnect() and raw_sendto()
*/
err_t
raw_connect(struct raw_pcb *pcb, struct ip_addr *ipaddr)
{
ip_addr_set(&pcb->remote_ip, ipaddr);
return ERR_OK;
}
/**
* Set the callback function for received packets that match the
* raw PCB's protocol and binding.
*
* The callback function MUST either
* - eat the packet by calling pbuf_free() and returning non-zero. The
* packet will not be passed to other raw PCBs or other protocol layers.
* - not free the packet, and return zero. The packet will be matched
* against further PCBs and/or forwarded to another protocol layers.
*
* @return non-zero if the packet was free()d, zero if the packet remains
* available for others.
*/
void
raw_recv(struct raw_pcb *pcb,
u8_t (* recv)(void *arg, struct raw_pcb *upcb, struct pbuf *p,
struct ip_addr *addr),
void *recv_arg)
{
/* remember recv() callback and user data */
pcb->recv = recv;
pcb->recv_arg = recv_arg;
}
/**
* Send the raw IP packet to the given address. Note that actually you cannot
* modify the IP headers (this is inconsistent with the receive callback where
* you actually get the IP headers), you can only specify the IP payload here.
* It requires some more changes in lwIP. (there will be a raw_send() function
* then.)
*
* @param pcb the raw pcb which to send
* @param p the IP payload to send
* @param ipaddr the destination address of the IP packet
*
*/
err_t
raw_sendto(struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr)
{
err_t err;
struct netif *netif;
struct ip_addr *src_ip;
struct pbuf *q; /* q will be sent down the stack */
LWIP_DEBUGF(RAW_DEBUG | DBG_TRACE | 3, ("raw_sendto\n"));
/* not enough space to add an IP header to first pbuf in given p chain? */
if (pbuf_header(p, IP_HLEN)) {
/* allocate header in new pbuf */
q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
/* new header pbuf could not be allocated? */
if (q == NULL) {
LWIP_DEBUGF(RAW_DEBUG | DBG_TRACE | 2, ("raw_sendto: could not allocate header\n"));
return ERR_MEM;
}
/* chain header q in front of given pbuf p */
pbuf_chain(q, p);
/* { first pbuf q points to header pbuf } */
LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
} else {
/* first pbuf q equals given pbuf */
q = p;
pbuf_header(q, -IP_HLEN);
}
if ((netif = ip_route(ipaddr)) == NULL) {
LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: No route to 0x%"X32_F"\n", ipaddr->addr));
#if RAW_STATS
/* ++lwip_stats.raw.rterr;*/
#endif /* RAW_STATS */
/* free any temporary header pbuf allocated by pbuf_header() */
if (q != p) {
pbuf_free(q);
}
return ERR_RTE;
}
if (ip_addr_isany(&pcb->local_ip)) {
/* use outgoing network interface IP address as source address */
src_ip = &(netif->ip_addr);
} else {
/* use RAW PCB local IP address as source address */
src_ip = &(pcb->local_ip);
}
err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
/* did we chain a header earlier? */
if (q != p) {
/* free the header */
pbuf_free(q);
}
return err;
}
/**
* Send the raw IP packet to the address given by raw_connect()
*
* @param pcb the raw pcb which to send
* @param p the IP payload to send
* @param ipaddr the destination address of the IP packet
*
*/
err_t
raw_send(struct raw_pcb *pcb, struct pbuf *p)
{
return raw_sendto(pcb, p, &pcb->remote_ip);
}
/**
* Remove an RAW PCB.
*
* @param pcb RAW PCB to be removed. The PCB is removed from the list of
* RAW PCB's and the data structure is freed from memory.
*
* @see raw_new()
*/
void
raw_remove(struct raw_pcb *pcb)
{
struct raw_pcb *pcb2;
/* pcb to be removed is first in list? */
if (raw_pcbs == pcb) {
/* make list start at 2nd pcb */
raw_pcbs = raw_pcbs->next;
/* pcb not 1st in list */
} else for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
/* find pcb in raw_pcbs list */
if (pcb2->next != NULL && pcb2->next == pcb) {
/* remove pcb from list */
pcb2->next = pcb->next;
}
}
memp_free(MEMP_RAW_PCB, pcb);
}
/**
* Create a RAW PCB.
*
* @return The RAW PCB which was created. NULL if the PCB data structure
* could not be allocated.
*
* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
*
* @see raw_remove()
*/
struct raw_pcb *
raw_new(u16_t proto) {
struct raw_pcb *pcb;
LWIP_DEBUGF(RAW_DEBUG | DBG_TRACE | 3, ("raw_new\n"));
pcb = memp_malloc(MEMP_RAW_PCB);
/* could allocate RAW PCB? */
if (pcb != NULL) {
/* initialize PCB to all zeroes */
memset(pcb, 0, sizeof(struct raw_pcb));
pcb->protocol = proto;
pcb->ttl = RAW_TTL;
pcb->next = raw_pcbs;
raw_pcbs = pcb;
}
return pcb;
}
#endif /* LWIP_RAW */

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/**
* @file
* Abstract Syntax Notation One (ISO 8824, 8825) decoding
*
* @todo not optimised (yet), favor correctness over speed, favor speed over size
*/
/*
* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Christiaan Simons <christiaan.simons@axon.tv>
*/
#include "lwip/opt.h"
#if LWIP_SNMP
#include "lwip/snmp_asn1.h"
/**
* Retrieves type field from incoming pbuf chain.
*
* @param p points to a pbuf holding an ASN1 coded type field
* @param ofs points to the offset within the pbuf chain of the ASN1 coded type field
* @param type return ASN1 type
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
*/
err_t
snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
*type = *msg_ptr;
return ERR_OK;
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Decodes length field from incoming pbuf chain into host length.
*
* @param p points to a pbuf holding an ASN1 coded length
* @param ofs points to the offset within the pbuf chain of the ASN1 coded length
* @param octets_used returns number of octets used by the length code
* @param length return host order length, upto 64k
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
*/
err_t
snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if (*msg_ptr < 0x80)
{
/* primitive definite length format */
*octets_used = 1;
*length = *msg_ptr;
return ERR_OK;
}
else if (*msg_ptr == 0x80)
{
/* constructed indefinite length format, termination with two zero octets */
u8_t zeros;
u8_t i;
*length = 0;
zeros = 0;
while (zeros != 2)
{
i = 2;
while (i > 0)
{
i--;
(*length) += 1;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
if (*msg_ptr == 0)
{
zeros++;
if (zeros == 2)
{
/* stop while (i > 0) */
i = 0;
}
}
else
{
zeros = 0;
}
}
}
*octets_used = 1;
return ERR_OK;
}
else if (*msg_ptr == 0x81)
{
/* constructed definite length format, one octet */
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
*length = *msg_ptr;
*octets_used = 2;
return ERR_OK;
}
else if (*msg_ptr == 0x82)
{
u8_t i;
/* constructed definite length format, two octets */
i = 2;
while (i > 0)
{
i--;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
if (i == 0)
{
/* least significant length octet */
*length |= *msg_ptr;
}
else
{
/* most significant length octet */
*length = (*msg_ptr) << 8;
}
}
*octets_used = 3;
return ERR_OK;
}
else
{
/* constructed definite length format 3..127 octets, this is too big (>64k) */
/** @todo: do we need to accept inefficient codings with many leading zero's? */
*octets_used = 1 + ((*msg_ptr) & 0x7f);
return ERR_ARG;
}
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Decodes positive integer (counter, gauge, timeticks) into u32_t.
*
* @param p points to a pbuf holding an ASN1 coded integer
* @param ofs points to the offset within the pbuf chain of the ASN1 coded integer
* @param len length of the coded integer field
* @param value return host order integer
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
*
* @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded
* as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value
* of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!!
*/
err_t
snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if ((len > 0) && (len < 6))
{
/* start from zero */
*value = 0;
if (*msg_ptr & 0x80)
{
/* negative, expecting zero sign bit! */
return ERR_ARG;
}
else
{
/* positive */
if ((len > 1) && (*msg_ptr == 0))
{
/* skip leading "sign byte" octet 0x00 */
len--;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
}
/* OR octets with value */
while (len > 1)
{
len--;
*value |= *msg_ptr;
*value <<= 8;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
*value |= *msg_ptr;
return ERR_OK;
}
else
{
return ERR_ARG;
}
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Decodes integer into s32_t.
*
* @param p points to a pbuf holding an ASN1 coded integer
* @param ofs points to the offset within the pbuf chain of the ASN1 coded integer
* @param len length of the coded integer field
* @param value return host order integer
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
*
* @note ASN coded integers are _always_ signed!
*/
err_t
snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value)
{
u16_t plen, base;
u8_t *msg_ptr;
u8_t *lsb_ptr = (u8_t*)value;
u8_t sign;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if ((len > 0) && (len < 5))
{
if (*msg_ptr & 0x80)
{
/* negative, start from -1 */
*value = -1;
sign = 1;
}
else
{
/* positive, start from 0 */
*value = 0;
sign = 0;
}
/* OR/AND octets with value */
while (len > 1)
{
len--;
if (sign)
{
*lsb_ptr &= *msg_ptr;
*value <<= 8;
*lsb_ptr |= 255;
}
else
{
*lsb_ptr |= *msg_ptr;
*value <<= 8;
}
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
if (sign)
{
*lsb_ptr &= *msg_ptr;
}
else
{
*lsb_ptr |= *msg_ptr;
}
return ERR_OK;
}
else
{
return ERR_ARG;
}
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Decodes object identifier from incoming message into array of s32_t.
*
* @param p points to a pbuf holding an ASN1 coded object identifier
* @param ofs points to the offset within the pbuf chain of the ASN1 coded object identifier
* @param len length of the coded object identifier
* @param oid return object identifier struct
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
*/
err_t
snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid)
{
u16_t plen, base;
u8_t *msg_ptr;
s32_t *oid_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
oid->len = 0;
oid_ptr = &oid->id[0];
if (len > 0)
{
/* first compressed octet */
if (*msg_ptr == 0x2B)
{
/* (most) common case 1.3 (iso.org) */
*oid_ptr = 1;
oid_ptr++;
*oid_ptr = 3;
oid_ptr++;
}
else if (*msg_ptr < 40)
{
*oid_ptr = 0;
oid_ptr++;
*oid_ptr = *msg_ptr;
oid_ptr++;
}
else if (*msg_ptr < 80)
{
*oid_ptr = 1;
oid_ptr++;
*oid_ptr = (*msg_ptr) - 40;
oid_ptr++;
}
else
{
*oid_ptr = 2;
oid_ptr++;
*oid_ptr = (*msg_ptr) - 80;
oid_ptr++;
}
oid->len = 2;
}
else
{
/* accepting zero length identifiers e.g. for
getnext operation. uncommon but valid */
return ERR_OK;
}
len--;
if (len > 0)
{
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
while ((len > 0) && (oid->len < LWIP_SNMP_OBJ_ID_LEN))
{
/* sub-identifier uses multiple octets */
if (*msg_ptr & 0x80)
{
s32_t sub_id = 0;
while ((*msg_ptr & 0x80) && (len > 1))
{
len--;
sub_id = (sub_id << 7) + (*msg_ptr & ~0x80);
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
if (!(*msg_ptr & 0x80) && (len > 0))
{
/* last octet sub-identifier */
len--;
sub_id = (sub_id << 7) + *msg_ptr;
*oid_ptr = sub_id;
}
}
else
{
/* !(*msg_ptr & 0x80) sub-identifier uses single octet */
len--;
*oid_ptr = *msg_ptr;
}
if (len > 0)
{
/* remaining oid bytes available ... */
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
oid_ptr++;
oid->len++;
}
if (len == 0)
{
/* len == 0, end of oid */
return ERR_OK;
}
else
{
/* len > 0, oid->len == LWIP_SNMP_OBJ_ID_LEN or malformed encoding */
return ERR_ARG;
}
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Decodes (copies) raw data (ip-addresses, octet strings, opaque encoding)
* from incoming message into array.
*
* @param p points to a pbuf holding an ASN1 coded raw data
* @param ofs points to the offset within the pbuf chain of the ASN1 coded raw data
* @param len length of the coded raw data (zero is valid, e.g. empty string!)
* @param raw_len length of the raw return value
* @param raw return raw bytes
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
*/
err_t
snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw)
{
u16_t plen, base;
u8_t *msg_ptr;
if (len > 0)
{
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if (raw_len >= len)
{
while (len > 1)
{
/* copy len - 1 octets */
len--;
*raw = *msg_ptr;
raw++;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
/* copy last octet */
*raw = *msg_ptr;
return ERR_OK;
}
else
{
/* raw_len < len, not enough dst space */
return ERR_ARG;
}
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
else
{
/* len == 0, empty string */
return ERR_OK;
}
}
#endif /* LWIP_SNMP */

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/**
* @file
* Abstract Syntax Notation One (ISO 8824, 8825) encoding
*
* @todo not optimised (yet), favor correctness over speed, favor speed over size
*/
/*
* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Christiaan Simons <christiaan.simons@axon.tv>
*/
#include "lwip/opt.h"
#if LWIP_SNMP
#include "lwip/snmp_asn1.h"
/**
* Returns octet count for length.
*
* @param length
* @param octets_needed points to the return value
*/
void
snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed)
{
if (length < 0x80U)
{
*octets_needed = 1;
}
else if (length < 0x100U)
{
*octets_needed = 2;
}
else
{
*octets_needed = 3;
}
}
/**
* Returns octet count for an u32_t.
*
* @param value
* @param octets_needed points to the return value
*
* @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded
* as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value
* of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!!
*/
void
snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed)
{
if (value < 0x80UL)
{
*octets_needed = 1;
}
else if (value < 0x8000UL)
{
*octets_needed = 2;
}
else if (value < 0x800000UL)
{
*octets_needed = 3;
}
else if (value < 0x80000000UL)
{
*octets_needed = 4;
}
else
{
*octets_needed = 5;
}
}
/**
* Returns octet count for an s32_t.
*
* @param value
* @param octets_needed points to the return value
*
* @note ASN coded integers are _always_ signed.
*/
void
snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed)
{
if (value < 0)
{
value = ~value;
}
if (value < 0x80L)
{
*octets_needed = 1;
}
else if (value < 0x8000L)
{
*octets_needed = 2;
}
else if (value < 0x800000L)
{
*octets_needed = 3;
}
else
{
*octets_needed = 4;
}
}
/**
* Returns octet count for an object identifier.
*
* @param ident_len object identifier array length
* @param ident points to object identifier array
* @param octets_needed points to the return value
*/
void
snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed)
{
s32_t sub_id;
u8_t cnt;
cnt = 0;
if (ident_len > 1)
{
/* compressed prefix in one octet */
cnt++;
ident_len -= 2;
ident += 2;
}
while(ident_len > 0)
{
ident_len--;
sub_id = *ident;
sub_id >>= 7;
cnt++;
while(sub_id > 0)
{
sub_id >>= 7;
cnt++;
}
ident++;
}
*octets_needed = cnt;
}
/**
* Encodes ASN type field into a pbuf chained ASN1 msg.
*
* @param p points to output pbuf to encode value into
* @param ofs points to the offset within the pbuf chain
* @param type input ASN1 type
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
*/
err_t
snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
*msg_ptr = type;
return ERR_OK;
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Encodes host order length field into a pbuf chained ASN1 msg.
*
* @param p points to output pbuf to encode length into
* @param ofs points to the offset within the pbuf chain
* @param length is the host order length to be encoded
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
*/
err_t
snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if (length < 0x80)
{
*msg_ptr = length;
return ERR_OK;
}
else if (length < 0x100)
{
*msg_ptr = 0x81;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
*msg_ptr = length;
return ERR_OK;
}
else
{
u8_t i;
/* length >= 0x100 && length <= 0xFFFF */
*msg_ptr = 0x82;
i = 2;
while (i > 0)
{
i--;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
if (i == 0)
{
/* least significant length octet */
*msg_ptr = length;
}
else
{
/* most significant length octet */
*msg_ptr = length >> 8;
}
}
return ERR_OK;
}
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Encodes u32_t (counter, gauge, timeticks) into a pbuf chained ASN1 msg.
*
* @param p points to output pbuf to encode value into
* @param ofs points to the offset within the pbuf chain
* @param octets_needed encoding length (from snmp_asn1_enc_u32t_cnt())
* @param value is the host order u32_t value to be encoded
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
*
* @see snmp_asn1_enc_u32t_cnt()
*/
err_t
snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if (octets_needed == 5)
{
/* not enough bits in 'value' add leading 0x00 */
octets_needed--;
*msg_ptr = 0x00;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
while (octets_needed > 1)
{
octets_needed--;
*msg_ptr = value >> (octets_needed << 3);
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
/* (only) one least significant octet */
*msg_ptr = value;
return ERR_OK;
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Encodes s32_t integer into a pbuf chained ASN1 msg.
*
* @param p points to output pbuf to encode value into
* @param ofs points to the offset within the pbuf chain
* @param octets_needed encoding length (from snmp_asn1_enc_s32t_cnt())
* @param value is the host order s32_t value to be encoded
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
*
* @see snmp_asn1_enc_s32t_cnt()
*/
err_t
snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
while (octets_needed > 1)
{
octets_needed--;
*msg_ptr = value >> (octets_needed << 3);
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
/* (only) one least significant octet */
*msg_ptr = value;
return ERR_OK;
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Encodes object identifier into a pbuf chained ASN1 msg.
*
* @param p points to output pbuf to encode oid into
* @param ofs points to the offset within the pbuf chain
* @param ident_len object identifier array length
* @param ident points to object identifier array
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
*/
err_t
snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
if (ident_len > 1)
{
if ((ident[0] == 1) && (ident[1] == 3))
{
/* compressed (most common) prefix .iso.org */
*msg_ptr = 0x2b;
}
else
{
/* calculate prefix */
*msg_ptr = (ident[0] * 40) + ident[1];
}
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
ident_len -= 2;
ident += 2;
}
else
{
/* @bug: allow empty varbinds for symmetry (we must decode them for getnext), allow partial compression?? */
/* ident_len <= 1, at least we need zeroDotZero (0.0) (ident_len == 2) */
return ERR_ARG;
}
while (ident_len > 0)
{
s32_t sub_id;
u8_t shift, tail;
ident_len--;
sub_id = *ident;
tail = 0;
shift = 28;
while(shift > 0)
{
u8_t code;
code = sub_id >> shift;
if ((code != 0) || (tail != 0))
{
tail = 1;
*msg_ptr = code | 0x80;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
shift -= 7;
}
*msg_ptr = (u8_t)sub_id & 0x7F;
if (ident_len > 0)
{
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
/* proceed to next sub-identifier */
ident++;
}
return ERR_OK;
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
/**
* Encodes raw data (octet string, opaque) into a pbuf chained ASN1 msg.
*
* @param p points to output pbuf to encode raw data into
* @param ofs points to the offset within the pbuf chain
* @param raw_len raw data length
* @param raw points raw data
* @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
*/
err_t
snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw)
{
u16_t plen, base;
u8_t *msg_ptr;
plen = 0;
while (p != NULL)
{
base = plen;
plen += p->len;
if (ofs < plen)
{
msg_ptr = p->payload;
msg_ptr += ofs - base;
while (raw_len > 1)
{
/* copy raw_len - 1 octets */
raw_len--;
*msg_ptr = *raw;
raw++;
ofs += 1;
if (ofs >= plen)
{
/* next octet in next pbuf */
p = p->next;
if (p == NULL) { return ERR_ARG; }
msg_ptr = p->payload;
plen += p->len;
}
else
{
/* next octet in same pbuf */
msg_ptr++;
}
}
if (raw_len > 0)
{
/* copy last or single octet */
*msg_ptr = *raw;
}
return ERR_OK;
}
p = p->next;
}
/* p == NULL, ofs >= plen */
return ERR_ARG;
}
#endif /* LWIP_SNMP */

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/**
* @file
* SNMP output message processing (RFC1157).
*
* Output responses and traps are build in two passes:
*
* Pass 0: iterate over the output message backwards to determine encoding lengths
* Pass 1: the actual forward encoding of internal form into ASN1
*
* The single-pass encoding method described by Comer & Stevens
* requires extra buffer space and copying for reversal of the packet.
* The buffer requirement can be prohibitively large for big payloads
* (>= 484) therefore we use the two encoding passes.
*/
/*
* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Christiaan Simons <christiaan.simons@axon.tv>
*/
#include "lwip/opt.h"
#if LWIP_SNMP
#include "arch/cc.h"
#include "lwip/udp.h"
#include "lwip/netif.h"
#include "lwip/snmp.h"
#include "lwip/snmp_asn1.h"
#include "lwip/snmp_msg.h"
struct snmp_trap_dst
{
/* destination IP address in network order */
struct ip_addr dip;
/* set to 0 when disabled, >0 when enabled */
u8_t enable;
};
#if (SNMP_TRAP_DESTINATIONS == 0)
#error "need at least one trap destination"
#endif
struct snmp_trap_dst trap_dst[SNMP_TRAP_DESTINATIONS];
/** TRAP message structure */
struct snmp_msg_trap trap_msg;
static u16_t snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len);
static u16_t snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len);
static u16_t snmp_varbind_list_sum(struct snmp_varbind_root *root);
static u16_t snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p);
static u16_t snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p);
static u16_t snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs);
/**
* Sets enable switch for this trap destination.
* @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1
* @param enable switch if 0 destination is disabled >0 enabled.
*/
void
snmp_trap_dst_enable(u8_t dst_idx, u8_t enable)
{
if (dst_idx < SNMP_TRAP_DESTINATIONS)
{
trap_dst[dst_idx].enable = enable;
}
}
/**
* Sets IPv4 address for this trap destination.
* @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1
* @param dst IPv4 address in host order.
*/
void
snmp_trap_dst_ip_set(u8_t dst_idx, struct ip_addr *dst)
{
if (dst_idx < SNMP_TRAP_DESTINATIONS)
{
trap_dst[dst_idx].dip.addr = htonl(dst->addr);
}
}
/**
* Sends a 'getresponse' message to the request originator.
*
* @param m_stat points to the current message request state source
* @return ERR_OK when success, ERR_MEM if we're out of memory
*
* @note the caller is responsible for filling in outvb in the m_stat
* and provide error-status and index (except for tooBig errors) ...
*/
err_t
snmp_send_response(struct snmp_msg_pstat *m_stat)
{
struct snmp_varbind_root emptyvb = {NULL, NULL, 0, 0, 0};
struct pbuf *p;
u16_t tot_len;
err_t err;
/* pass 0, calculate length fields */
tot_len = snmp_varbind_list_sum(&m_stat->outvb);
tot_len = snmp_resp_header_sum(m_stat, tot_len);
/* try allocating pbuf(s) for complete response */
p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
if (p == NULL)
{
LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() tooBig\n"));
/* can't construct reply, return error-status tooBig */
m_stat->error_status = SNMP_ES_TOOBIG;
m_stat->error_index = 0;
/* pass 0, recalculate lengths, for empty varbind-list */
tot_len = snmp_varbind_list_sum(&emptyvb);
tot_len = snmp_resp_header_sum(m_stat, tot_len);
/* retry allocation once for header and empty varbind-list */
p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
}
if (p != NULL)
{
/* first pbuf alloc try or retry alloc success */
u16_t ofs;
LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() p != NULL\n"));
/* pass 1, size error, encode packet ino the pbuf(s) */
ofs = snmp_resp_header_enc(m_stat, p);
if (m_stat->error_status == SNMP_ES_TOOBIG)
{
snmp_varbind_list_enc(&emptyvb, p, ofs);
}
else
{
snmp_varbind_list_enc(&m_stat->outvb, p, ofs);
}
switch (m_stat->error_status)
{
case SNMP_ES_TOOBIG:
snmp_inc_snmpouttoobigs();
break;
case SNMP_ES_NOSUCHNAME:
snmp_inc_snmpoutnosuchnames();
break;
case SNMP_ES_BADVALUE:
snmp_inc_snmpoutbadvalues();
break;
case SNMP_ES_GENERROR:
snmp_inc_snmpoutgenerrs();
break;
}
snmp_inc_snmpoutgetresponses();
snmp_inc_snmpoutpkts();
/** @todo do we need separate rx and tx pcbs for threaded case? */
/** connect to the originating source */
udp_connect(m_stat->pcb, &m_stat->sip, m_stat->sp);
err = udp_send(m_stat->pcb, p);
if (err == ERR_MEM)
{
/** @todo release some memory, retry and return tooBig? tooMuchHassle? */
err = ERR_MEM;
}
else
{
err = ERR_OK;
}
/** disassociate remote address and port with this pcb */
udp_disconnect(m_stat->pcb);
pbuf_free(p);
LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() done\n"));
return err;
}
else
{
/* first pbuf alloc try or retry alloc failed
very low on memory, couldn't return tooBig */
return ERR_MEM;
}
}
/**
* Sends an generic or enterprise specific trap message.
*
* @param generic_trap is the trap code
* @param eoid points to enterprise object identifier
* @param specific_trap used for enterprise traps when generic_trap == 6
* @return ERR_OK when success, ERR_MEM if we're out of memory
*
* @note the caller is responsible for filling in outvb in the trap_msg
* @note the use of the enterpise identifier field
* is per RFC1215.
* Use .iso.org.dod.internet.mgmt.mib-2.snmp for generic traps
* and .iso.org.dod.internet.private.enterprises.yourenterprise
* (sysObjectID) for specific traps.
*/
err_t
snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap)
{
struct snmp_trap_dst *td;
struct netif *dst_if;
struct ip_addr dst_ip;
struct pbuf *p;
u16_t i,tot_len;
for (i=0, td = &trap_dst[0]; i<SNMP_TRAP_DESTINATIONS; i++, td++)
{
if ((td->enable != 0) && (td->dip.addr != 0))
{
/* network order trap destination */
trap_msg.dip.addr = td->dip.addr;
/* lookup current source address for this dst */
dst_if = ip_route(&td->dip);
dst_ip.addr = ntohl(dst_if->ip_addr.addr);
trap_msg.sip_raw[0] = dst_ip.addr >> 24;
trap_msg.sip_raw[1] = dst_ip.addr >> 16;
trap_msg.sip_raw[2] = dst_ip.addr >> 8;
trap_msg.sip_raw[3] = dst_ip.addr;
trap_msg.gen_trap = generic_trap;
trap_msg.spc_trap = specific_trap;
if (generic_trap == SNMP_GENTRAP_ENTERPRISESPC)
{
/* enterprise-Specific trap */
trap_msg.enterprise = eoid;
}
else
{
/* generic (MIB-II) trap */
snmp_get_snmpgrpid_ptr(&trap_msg.enterprise);
}
snmp_get_sysuptime(&trap_msg.ts);
/* pass 0, calculate length fields */
tot_len = snmp_varbind_list_sum(&trap_msg.outvb);
tot_len = snmp_trap_header_sum(&trap_msg, tot_len);
/* allocate pbuf(s) */
p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
if (p != NULL)
{
u16_t ofs;
/* pass 1, encode packet ino the pbuf(s) */
ofs = snmp_trap_header_enc(&trap_msg, p);
snmp_varbind_list_enc(&trap_msg.outvb, p, ofs);
snmp_inc_snmpouttraps();
snmp_inc_snmpoutpkts();
/** connect to the TRAP destination */
udp_connect(trap_msg.pcb, &trap_msg.dip, SNMP_TRAP_PORT);
udp_send(trap_msg.pcb, p);
/** disassociate remote address and port with this pcb */
udp_disconnect(trap_msg.pcb);
pbuf_free(p);
}
else
{
return ERR_MEM;
}
}
}
return ERR_OK;
}
void
snmp_coldstart_trap(void)
{
trap_msg.outvb.head = NULL;
trap_msg.outvb.tail = NULL;
trap_msg.outvb.count = 0;
snmp_send_trap(SNMP_GENTRAP_COLDSTART, NULL, 0);
}
void
snmp_authfail_trap(void)
{
u8_t enable;
snmp_get_snmpenableauthentraps(&enable);
if (enable == 1)
{
trap_msg.outvb.head = NULL;
trap_msg.outvb.tail = NULL;
trap_msg.outvb.count = 0;
snmp_send_trap(SNMP_GENTRAP_AUTHFAIL, NULL, 0);
}
}
/**
* Sums response header field lengths from tail to head and
* returns resp_header_lengths for second encoding pass.
*
* @param vb_len varbind-list length
* @param rhl points to returned header lengths
* @return the required lenght for encoding the response header
*/
static u16_t
snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len)
{
u16_t tot_len;
struct snmp_resp_header_lengths *rhl;
rhl = &m_stat->rhl;
tot_len = vb_len;
snmp_asn1_enc_s32t_cnt(m_stat->error_index, &rhl->erridxlen);
snmp_asn1_enc_length_cnt(rhl->erridxlen, &rhl->erridxlenlen);
tot_len += 1 + rhl->erridxlenlen + rhl->erridxlen;
snmp_asn1_enc_s32t_cnt(m_stat->error_status, &rhl->errstatlen);
snmp_asn1_enc_length_cnt(rhl->errstatlen, &rhl->errstatlenlen);
tot_len += 1 + rhl->errstatlenlen + rhl->errstatlen;
snmp_asn1_enc_s32t_cnt(m_stat->rid, &rhl->ridlen);
snmp_asn1_enc_length_cnt(rhl->ridlen, &rhl->ridlenlen);
tot_len += 1 + rhl->ridlenlen + rhl->ridlen;
rhl->pdulen = tot_len;
snmp_asn1_enc_length_cnt(rhl->pdulen, &rhl->pdulenlen);
tot_len += 1 + rhl->pdulenlen;
rhl->comlen = m_stat->com_strlen;
snmp_asn1_enc_length_cnt(rhl->comlen, &rhl->comlenlen);
tot_len += 1 + rhl->comlenlen + rhl->comlen;
snmp_asn1_enc_s32t_cnt(snmp_version, &rhl->verlen);
snmp_asn1_enc_length_cnt(rhl->verlen, &rhl->verlenlen);
tot_len += 1 + rhl->verlen + rhl->verlenlen;
rhl->seqlen = tot_len;
snmp_asn1_enc_length_cnt(rhl->seqlen, &rhl->seqlenlen);
tot_len += 1 + rhl->seqlenlen;
return tot_len;
}
/**
* Sums trap header field lengths from tail to head and
* returns trap_header_lengths for second encoding pass.
*
* @param vb_len varbind-list length
* @param thl points to returned header lengths
* @return the required lenght for encoding the trap header
*/
static u16_t
snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len)
{
u16_t tot_len;
struct snmp_trap_header_lengths *thl;
thl = &m_trap->thl;
tot_len = vb_len;
snmp_asn1_enc_u32t_cnt(m_trap->ts, &thl->tslen);
snmp_asn1_enc_length_cnt(thl->tslen, &thl->tslenlen);
tot_len += 1 + thl->tslen + thl->tslenlen;
snmp_asn1_enc_s32t_cnt(m_trap->spc_trap, &thl->strplen);
snmp_asn1_enc_length_cnt(thl->strplen, &thl->strplenlen);
tot_len += 1 + thl->strplen + thl->strplenlen;
snmp_asn1_enc_s32t_cnt(m_trap->gen_trap, &thl->gtrplen);
snmp_asn1_enc_length_cnt(thl->gtrplen, &thl->gtrplenlen);
tot_len += 1 + thl->gtrplen + thl->gtrplenlen;
thl->aaddrlen = 4;
snmp_asn1_enc_length_cnt(thl->aaddrlen, &thl->aaddrlenlen);
tot_len += 1 + thl->aaddrlen + thl->aaddrlenlen;
snmp_asn1_enc_oid_cnt(m_trap->enterprise->len, &m_trap->enterprise->id[0], &thl->eidlen);
snmp_asn1_enc_length_cnt(thl->eidlen, &thl->eidlenlen);
tot_len += 1 + thl->eidlen + thl->eidlenlen;
thl->pdulen = tot_len;
snmp_asn1_enc_length_cnt(thl->pdulen, &thl->pdulenlen);
tot_len += 1 + thl->pdulenlen;
thl->comlen = sizeof(snmp_publiccommunity) - 1;
snmp_asn1_enc_length_cnt(thl->comlen, &thl->comlenlen);
tot_len += 1 + thl->comlenlen + thl->comlen;
snmp_asn1_enc_s32t_cnt(snmp_version, &thl->verlen);
snmp_asn1_enc_length_cnt(thl->verlen, &thl->verlenlen);
tot_len += 1 + thl->verlen + thl->verlenlen;
thl->seqlen = tot_len;
snmp_asn1_enc_length_cnt(thl->seqlen, &thl->seqlenlen);
tot_len += 1 + thl->seqlenlen;
return tot_len;
}
/**
* Sums varbind lengths from tail to head and
* annotates lengths in varbind for second encoding pass.
*
* @param root points to the root of the variable binding list
* @return the required lenght for encoding the variable bindings
*/
static u16_t
snmp_varbind_list_sum(struct snmp_varbind_root *root)
{
struct snmp_varbind *vb;
u32_t *uint_ptr;
s32_t *sint_ptr;
u16_t tot_len;
tot_len = 0;
vb = root->tail;
while ( vb != NULL )
{
/* encoded value lenght depends on type */
switch (vb->value_type)
{
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
sint_ptr = vb->value;
snmp_asn1_enc_s32t_cnt(*sint_ptr, &vb->vlen);
break;
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
uint_ptr = vb->value;
snmp_asn1_enc_u32t_cnt(*uint_ptr, &vb->vlen);
break;
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
vb->vlen = vb->value_len;
break;
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
sint_ptr = vb->value;
snmp_asn1_enc_oid_cnt(vb->value_len / sizeof(s32_t), sint_ptr, &vb->vlen);
break;
default:
/* unsupported type */
vb->vlen = 0;
break;
};
/* encoding length of value length field */
snmp_asn1_enc_length_cnt(vb->vlen, &vb->vlenlen);
snmp_asn1_enc_oid_cnt(vb->ident_len, vb->ident, &vb->olen);
snmp_asn1_enc_length_cnt(vb->olen, &vb->olenlen);
vb->seqlen = 1 + vb->vlenlen + vb->vlen;
vb->seqlen += 1 + vb->olenlen + vb->olen;
snmp_asn1_enc_length_cnt(vb->seqlen, &vb->seqlenlen);
/* varbind seq */
tot_len += 1 + vb->seqlenlen + vb->seqlen;
vb = vb->prev;
}
/* varbind-list seq */
root->seqlen = tot_len;
snmp_asn1_enc_length_cnt(root->seqlen, &root->seqlenlen);
tot_len += 1 + root->seqlenlen;
return tot_len;
}
/**
* Encodes response header from head to tail.
*/
static u16_t
snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p)
{
u16_t ofs;
ofs = 0;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.seqlen);
ofs += m_stat->rhl.seqlenlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.verlen);
ofs += m_stat->rhl.verlenlen;
snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.verlen, snmp_version);
ofs += m_stat->rhl.verlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.comlen);
ofs += m_stat->rhl.comlenlen;
snmp_asn1_enc_raw(p, ofs, m_stat->rhl.comlen, m_stat->community);
ofs += m_stat->rhl.comlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.pdulen);
ofs += m_stat->rhl.pdulenlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.ridlen);
ofs += m_stat->rhl.ridlenlen;
snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.ridlen, m_stat->rid);
ofs += m_stat->rhl.ridlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.errstatlen);
ofs += m_stat->rhl.errstatlenlen;
snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.errstatlen, m_stat->error_status);
ofs += m_stat->rhl.errstatlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_stat->rhl.erridxlen);
ofs += m_stat->rhl.erridxlenlen;
snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.erridxlen, m_stat->error_index);
ofs += m_stat->rhl.erridxlen;
return ofs;
}
/**
* Encodes trap header from head to tail.
*/
static u16_t
snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p)
{
u16_t ofs;
ofs = 0;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.seqlen);
ofs += m_trap->thl.seqlenlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.verlen);
ofs += m_trap->thl.verlenlen;
snmp_asn1_enc_s32t(p, ofs, m_trap->thl.verlen, snmp_version);
ofs += m_trap->thl.verlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.comlen);
ofs += m_trap->thl.comlenlen;
snmp_asn1_enc_raw(p, ofs, m_trap->thl.comlen, (u8_t *)&snmp_publiccommunity[0]);
ofs += m_trap->thl.comlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.pdulen);
ofs += m_trap->thl.pdulenlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.eidlen);
ofs += m_trap->thl.eidlenlen;
snmp_asn1_enc_oid(p, ofs, m_trap->enterprise->len, &m_trap->enterprise->id[0]);
ofs += m_trap->thl.eidlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.aaddrlen);
ofs += m_trap->thl.aaddrlenlen;
snmp_asn1_enc_raw(p, ofs, m_trap->thl.aaddrlen, &m_trap->sip_raw[0]);
ofs += m_trap->thl.aaddrlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.gtrplen);
ofs += m_trap->thl.gtrplenlen;
snmp_asn1_enc_u32t(p, ofs, m_trap->thl.gtrplen, m_trap->gen_trap);
ofs += m_trap->thl.gtrplen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.strplen);
ofs += m_trap->thl.strplenlen;
snmp_asn1_enc_u32t(p, ofs, m_trap->thl.strplen, m_trap->spc_trap);
ofs += m_trap->thl.strplen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS));
ofs += 1;
snmp_asn1_enc_length(p, ofs, m_trap->thl.tslen);
ofs += m_trap->thl.tslenlen;
snmp_asn1_enc_u32t(p, ofs, m_trap->thl.tslen, m_trap->ts);
ofs += m_trap->thl.tslen;
return ofs;
}
/**
* Encodes varbind list from head to tail.
*/
static u16_t
snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs)
{
struct snmp_varbind *vb;
s32_t *sint_ptr;
u32_t *uint_ptr;
u8_t *raw_ptr;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
ofs += 1;
snmp_asn1_enc_length(p, ofs, root->seqlen);
ofs += root->seqlenlen;
vb = root->head;
while ( vb != NULL )
{
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
ofs += 1;
snmp_asn1_enc_length(p, ofs, vb->seqlen);
ofs += vb->seqlenlen;
snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID));
ofs += 1;
snmp_asn1_enc_length(p, ofs, vb->olen);
ofs += vb->olenlen;
snmp_asn1_enc_oid(p, ofs, vb->ident_len, &vb->ident[0]);
ofs += vb->olen;
snmp_asn1_enc_type(p, ofs, vb->value_type);
ofs += 1;
snmp_asn1_enc_length(p, ofs, vb->vlen);
ofs += vb->vlenlen;
switch (vb->value_type)
{
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
sint_ptr = vb->value;
snmp_asn1_enc_s32t(p, ofs, vb->vlen, *sint_ptr);
break;
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
uint_ptr = vb->value;
snmp_asn1_enc_u32t(p, ofs, vb->vlen, *uint_ptr);
break;
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
raw_ptr = vb->value;
snmp_asn1_enc_raw(p, ofs, vb->vlen, raw_ptr);
break;
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
break;
case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
sint_ptr = vb->value;
snmp_asn1_enc_oid(p, ofs, vb->value_len / sizeof(s32_t), sint_ptr);
break;
default:
/* unsupported type */
break;
};
ofs += vb->vlen;
vb = vb->next;
}
return ofs;
}
#endif /* LWIP_SNMP */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <string.h>
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/stats.h"
#include "lwip/mem.h"
#if LWIP_STATS
struct stats_ lwip_stats;
void
stats_init(void)
{
memset(&lwip_stats, 0, sizeof(struct stats_));
}
#if LWIP_STATS_DISPLAY
void
stats_display_proto(struct stats_proto *proto, char *name)
{
LWIP_PLATFORM_DIAG(("\n%s\n\t", name));
LWIP_PLATFORM_DIAG(("xmit: %"S16_F"\n\t", proto->xmit));
LWIP_PLATFORM_DIAG(("rexmit: %"S16_F"\n\t", proto->rexmit));
LWIP_PLATFORM_DIAG(("recv: %"S16_F"\n\t", proto->recv));
LWIP_PLATFORM_DIAG(("fw: %"S16_F"\n\t", proto->fw));
LWIP_PLATFORM_DIAG(("drop: %"S16_F"\n\t", proto->drop));
LWIP_PLATFORM_DIAG(("chkerr: %"S16_F"\n\t", proto->chkerr));
LWIP_PLATFORM_DIAG(("lenerr: %"S16_F"\n\t", proto->lenerr));
LWIP_PLATFORM_DIAG(("memerr: %"S16_F"\n\t", proto->memerr));
LWIP_PLATFORM_DIAG(("rterr: %"S16_F"\n\t", proto->rterr));
LWIP_PLATFORM_DIAG(("proterr: %"S16_F"\n\t", proto->proterr));
LWIP_PLATFORM_DIAG(("opterr: %"S16_F"\n\t", proto->opterr));
LWIP_PLATFORM_DIAG(("err: %"S16_F"\n\t", proto->err));
LWIP_PLATFORM_DIAG(("cachehit: %"S16_F"\n", proto->cachehit));
}
void
stats_display_pbuf(struct stats_pbuf *pbuf)
{
LWIP_PLATFORM_DIAG(("\nPBUF\n\t"));
LWIP_PLATFORM_DIAG(("avail: %"S16_F"\n\t", pbuf->avail));
LWIP_PLATFORM_DIAG(("used: %"S16_F"\n\t", pbuf->used));
LWIP_PLATFORM_DIAG(("max: %"S16_F"\n\t", pbuf->max));
LWIP_PLATFORM_DIAG(("err: %"S16_F"\n\t", pbuf->err));
LWIP_PLATFORM_DIAG(("alloc_locked: %"S16_F"\n\t", pbuf->alloc_locked));
LWIP_PLATFORM_DIAG(("refresh_locked: %"S16_F"\n", pbuf->refresh_locked));
}
void
stats_display_mem(struct stats_mem *mem, char *name)
{
LWIP_PLATFORM_DIAG(("\n MEM %s\n\t", name));
LWIP_PLATFORM_DIAG(("avail: %"MEM_SIZE_F"\n\t", mem->avail));
LWIP_PLATFORM_DIAG(("used: %"MEM_SIZE_F"\n\t", mem->used));
LWIP_PLATFORM_DIAG(("max: %"MEM_SIZE_F"\n\t", mem->max));
LWIP_PLATFORM_DIAG(("err: %"MEM_SIZE_F"\n", mem->err));
}
void
stats_display(void)
{
s16_t i;
char * memp_names[] = {"PBUF", "RAW_PCB", "UDP_PCB", "TCP_PCB", "TCP_PCB_LISTEN",
"TCP_SEG", "NETBUF", "NETCONN", "API_MSG", "TCP_MSG", "TIMEOUT"};
stats_display_proto(&lwip_stats.link, "LINK");
stats_display_proto(&lwip_stats.ip_frag, "IP_FRAG");
stats_display_proto(&lwip_stats.ip, "IP");
stats_display_proto(&lwip_stats.icmp, "ICMP");
stats_display_proto(&lwip_stats.udp, "UDP");
stats_display_proto(&lwip_stats.tcp, "TCP");
stats_display_pbuf(&lwip_stats.pbuf);
stats_display_mem(&lwip_stats.mem, "HEAP");
for (i = 0; i < MEMP_MAX; i++) {
stats_display_mem(&lwip_stats.memp[i], memp_names[i]);
}
}
#endif /* LWIP_STATS_DISPLAY */
#endif /* LWIP_STATS */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "lwip/sys.h"
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/memp.h"
#if (NO_SYS == 0)
struct sswt_cb
{
s16_t timeflag;
sys_sem_t *psem;
};
void
sys_mbox_fetch(sys_mbox_t mbox, void **msg)
{
u32_t time;
struct sys_timeouts *timeouts;
struct sys_timeo *tmptimeout;
sys_timeout_handler h;
void *arg;
again:
timeouts = sys_arch_timeouts();
if (!timeouts || !timeouts->next) {
sys_arch_mbox_fetch(mbox, msg, 0);
} else {
if (timeouts->next->time > 0) {
time = sys_arch_mbox_fetch(mbox, msg, timeouts->next->time);
} else {
time = SYS_ARCH_TIMEOUT;
}
if (time == SYS_ARCH_TIMEOUT) {
/* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
could be fetched. We should now call the timeout handler and
deallocate the memory allocated for the timeout. */
tmptimeout = timeouts->next;
timeouts->next = tmptimeout->next;
h = tmptimeout->h;
arg = tmptimeout->arg;
memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
if (h != NULL) {
LWIP_DEBUGF(SYS_DEBUG, ("smf calling h=%p(%p)\n", (void *)h, (void *)arg));
h(arg);
}
/* We try again to fetch a message from the mbox. */
goto again;
} else {
/* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
occured. The time variable is set to the number of
milliseconds we waited for the message. */
if (time <= timeouts->next->time) {
timeouts->next->time -= time;
} else {
timeouts->next->time = 0;
}
}
}
}
void
sys_sem_wait(sys_sem_t sem)
{
u32_t time;
struct sys_timeouts *timeouts;
struct sys_timeo *tmptimeout;
sys_timeout_handler h;
void *arg;
/* while (sys_arch_sem_wait(sem, 1000) == 0);
return;*/
again:
timeouts = sys_arch_timeouts();
if (!timeouts || !timeouts->next) {
sys_arch_sem_wait(sem, 0);
} else {
if (timeouts->next->time > 0) {
time = sys_arch_sem_wait(sem, timeouts->next->time);
} else {
time = SYS_ARCH_TIMEOUT;
}
if (time == SYS_ARCH_TIMEOUT) {
/* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
could be fetched. We should now call the timeout handler and
deallocate the memory allocated for the timeout. */
tmptimeout = timeouts->next;
timeouts->next = tmptimeout->next;
h = tmptimeout->h;
arg = tmptimeout->arg;
memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
if (h != NULL) {
LWIP_DEBUGF(SYS_DEBUG, ("ssw h=%p(%p)\n", (void *)h, (void *)arg));
h(arg);
}
/* We try again to fetch a message from the mbox. */
goto again;
} else {
/* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
occured. The time variable is set to the number of
milliseconds we waited for the message. */
if (time <= timeouts->next->time) {
timeouts->next->time -= time;
} else {
timeouts->next->time = 0;
}
}
}
}
void
sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
{
struct sys_timeouts *timeouts;
struct sys_timeo *timeout, *t;
timeout = memp_malloc(MEMP_SYS_TIMEOUT);
if (timeout == NULL) {
return;
}
timeout->next = NULL;
timeout->h = h;
timeout->arg = arg;
timeout->time = msecs;
timeouts = sys_arch_timeouts();
LWIP_DEBUGF(SYS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" h=%p arg=%p\n",
(void *)timeout, msecs, (void *)h, (void *)arg));
LWIP_ASSERT("sys_timeout: timeouts != NULL", timeouts != NULL);
if (timeouts->next == NULL) {
timeouts->next = timeout;
return;
}
if (timeouts->next->time > msecs) {
timeouts->next->time -= msecs;
timeout->next = timeouts->next;
timeouts->next = timeout;
} else {
for(t = timeouts->next; t != NULL; t = t->next) {
timeout->time -= t->time;
if (t->next == NULL || t->next->time > timeout->time) {
if (t->next != NULL) {
t->next->time -= timeout->time;
}
timeout->next = t->next;
t->next = timeout;
break;
}
}
}
}
/* Go through timeout list (for this task only) and remove the first matching entry,
even though the timeout has not triggered yet.
*/
void
sys_untimeout(sys_timeout_handler h, void *arg)
{
struct sys_timeouts *timeouts;
struct sys_timeo *prev_t, *t;
timeouts = sys_arch_timeouts();
if (timeouts->next == NULL)
return;
for (t = timeouts->next, prev_t = NULL; t != NULL; prev_t = t, t = t->next)
{
if ((t->h == h) && (t->arg == arg))
{
/* We have a match */
/* Unlink from previous in list */
if (prev_t == NULL)
timeouts->next = t->next;
else
prev_t->next = t->next;
/* If not the last one, add time of this one back to next */
if (t->next != NULL)
t->next->time += t->time;
memp_free(MEMP_SYS_TIMEOUT, t);
return;
}
}
return;
}
static void
sswt_handler(void *arg)
{
struct sswt_cb *sswt_cb = (struct sswt_cb *) arg;
/* Timeout. Set flag to TRUE and signal semaphore */
sswt_cb->timeflag = 1;
sys_sem_signal(*(sswt_cb->psem));
}
/* Wait for a semaphore with timeout (specified in ms) */
/* timeout = 0: wait forever */
/* Returns 0 on timeout. 1 otherwise */
int
sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout)
{
struct sswt_cb sswt_cb;
sswt_cb.psem = &sem;
sswt_cb.timeflag = 0;
/* If timeout is zero, then just wait forever */
if (timeout > 0)
/* Create a timer and pass it the address of our flag */
sys_timeout(timeout, sswt_handler, &sswt_cb);
sys_sem_wait(sem);
/* Was it a timeout? */
if (sswt_cb.timeflag)
{
/* timeout */
return 0;
} else {
/* Not a timeout. Remove timeout entry */
sys_untimeout(sswt_handler, &sswt_cb);
return 1;
}
}
void
sys_msleep(u32_t ms)
{
sys_sem_t delaysem = sys_sem_new(0);
sys_sem_wait_timeout(delaysem, ms);
sys_sem_free(delaysem);
}
#endif /* NO_SYS */

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/**
* @file
*
* Transmission Control Protocol, outgoing traffic
*
* The output functions of TCP.
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <string.h>
#include "lwip/def.h"
#include "lwip/opt.h"
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/sys.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/inet.h"
#include "lwip/tcp.h"
#include "lwip/stats.h"
#include "lwip/snmp.h"
#if LWIP_TCP
/* Forward declarations.*/
static void tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb);
err_t
tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags)
{
/* no data, no length, flags, copy=1, no optdata, no optdatalen */
return tcp_enqueue(pcb, NULL, 0, flags, 1, NULL, 0);
}
/**
* Write data for sending (but does not send it immediately).
*
* It waits in the expectation of more data being sent soon (as
* it can send them more efficiently by combining them together).
* To prompt the system to send data now, call tcp_output() after
* calling tcp_write().
*
* @arg pcb Protocol control block of the TCP connection to enqueue data for.
*
* @see tcp_write()
*/
err_t
tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t copy)
{
LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_write(pcb=%p, arg=%p, len=%"U16_F", copy=%"U16_F")\n", (void *)pcb,
arg, len, (u16_t)copy));
/* connection is in valid state for data transmission? */
if (pcb->state == ESTABLISHED ||
pcb->state == CLOSE_WAIT ||
pcb->state == SYN_SENT ||
pcb->state == SYN_RCVD) {
if (len > 0) {
return tcp_enqueue(pcb, (void *)arg, len, 0, copy, NULL, 0);
}
return ERR_OK;
} else {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | DBG_STATE | 3, ("tcp_write() called in invalid state\n"));
return ERR_CONN;
}
}
/**
* Enqueue either data or TCP options (but not both) for tranmission
*
*
*
* @arg pcb Protocol control block for the TCP connection to enqueue data for.
* @arg arg Pointer to the data to be enqueued for sending.
* @arg len Data length in bytes
* @arg flags
* @arg copy 1 if data must be copied, 0 if data is non-volatile and can be
* referenced.
* @arg optdata
* @arg optlen
*/
err_t
tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
u8_t flags, u8_t copy,
u8_t *optdata, u8_t optlen)
{
struct pbuf *p;
struct tcp_seg *seg, *useg, *queue;
u32_t left, seqno;
u16_t seglen;
void *ptr;
u8_t queuelen;
LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_enqueue(pcb=%p, arg=%p, len=%"U16_F", flags=%"X16_F", copy=%"U16_F")\n",
(void *)pcb, arg, len, (u16_t)flags, (u16_t)copy));
LWIP_ASSERT("tcp_enqueue: len == 0 || optlen == 0 (programmer violates API)",
len == 0 || optlen == 0);
LWIP_ASSERT("tcp_enqueue: arg == NULL || optdata == NULL (programmer violates API)",
arg == NULL || optdata == NULL);
/* fail on too much data */
if (len > pcb->snd_buf) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too much data (len=%"U16_F" > snd_buf=%"U16_F")\n", len, pcb->snd_buf));
return ERR_MEM;
}
left = len;
ptr = arg;
/* seqno will be the sequence number of the first segment enqueued
* by the call to this function. */
seqno = pcb->snd_lbb;
LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: queuelen: %"U16_F"\n", (u16_t)pcb->snd_queuelen));
/* If total number of pbufs on the unsent/unacked queues exceeds the
* configured maximum, return an error */
queuelen = pcb->snd_queuelen;
if (queuelen >= TCP_SND_QUEUELEN) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too long queue %"U16_F" (max %"U16_F")\n", queuelen, TCP_SND_QUEUELEN));
TCP_STATS_INC(tcp.memerr);
return ERR_MEM;
}
if (queuelen != 0) {
LWIP_ASSERT("tcp_enqueue: pbufs on queue => at least one queue non-empty",
pcb->unacked != NULL || pcb->unsent != NULL);
} else {
LWIP_ASSERT("tcp_enqueue: no pbufs on queue => both queues empty",
pcb->unacked == NULL && pcb->unsent == NULL);
}
/* First, break up the data into segments and tuck them together in
* the local "queue" variable. */
useg = queue = seg = NULL;
seglen = 0;
while (queue == NULL || left > 0) {
/* The segment length should be the MSS if the data to be enqueued
* is larger than the MSS. */
seglen = left > pcb->mss? pcb->mss: left;
/* Allocate memory for tcp_seg, and fill in fields. */
seg = memp_malloc(MEMP_TCP_SEG);
if (seg == NULL) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: could not allocate memory for tcp_seg\n"));
goto memerr;
}
seg->next = NULL;
seg->p = NULL;
/* first segment of to-be-queued data? */
if (queue == NULL) {
queue = seg;
}
/* subsequent segments of to-be-queued data */
else {
/* Attach the segment to the end of the queued segments */
LWIP_ASSERT("useg != NULL", useg != NULL);
useg->next = seg;
}
/* remember last segment of to-be-queued data for next iteration */
useg = seg;
/* If copy is set, memory should be allocated
* and data copied into pbuf, otherwise data comes from
* ROM or other static memory, and need not be copied. If
* optdata is != NULL, we have options instead of data. */
/* options? */
if (optdata != NULL) {
if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) {
goto memerr;
}
++queuelen;
seg->dataptr = seg->p->payload;
}
/* copy from volatile memory? */
else if (copy) {
if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, seglen, PBUF_RAM)) == NULL) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue : could not allocate memory for pbuf copy size %"U16_F"\n", seglen));
goto memerr;
}
++queuelen;
if (arg != NULL) {
memcpy(seg->p->payload, ptr, seglen);
}
seg->dataptr = seg->p->payload;
}
/* do not copy data */
else {
/* First, allocate a pbuf for holding the data.
* since the referenced data is available at least until it is sent out on the
* link (as it has to be ACKed by the remote party) we can safely use PBUF_ROM
* instead of PBUF_REF here.
*/
if ((p = pbuf_alloc(PBUF_TRANSPORT, seglen, PBUF_ROM)) == NULL) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: could not allocate memory for zero-copy pbuf\n"));
goto memerr;
}
++queuelen;
/* reference the non-volatile payload data */
p->payload = ptr;
seg->dataptr = ptr;
/* Second, allocate a pbuf for the headers. */
if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_RAM)) == NULL) {
/* If allocation fails, we have to deallocate the data pbuf as
* well. */
pbuf_free(p);
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: could not allocate memory for header pbuf\n"));
goto memerr;
}
++queuelen;
/* Concatenate the headers and data pbufs together. */
pbuf_cat(seg->p/*header*/, p/*data*/);
p = NULL;
}
/* Now that there are more segments queued, we check again if the
length of the queue exceeds the configured maximum. */
if (queuelen > TCP_SND_QUEUELEN) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: queue too long %"U16_F" (%"U16_F")\n", queuelen, TCP_SND_QUEUELEN));
goto memerr;
}
seg->len = seglen;
/* build TCP header */
if (pbuf_header(seg->p, TCP_HLEN)) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: no room for TCP header in pbuf.\n"));
TCP_STATS_INC(tcp.err);
goto memerr;
}
seg->tcphdr = seg->p->payload;
seg->tcphdr->src = htons(pcb->local_port);
seg->tcphdr->dest = htons(pcb->remote_port);
seg->tcphdr->seqno = htonl(seqno);
seg->tcphdr->urgp = 0;
TCPH_FLAGS_SET(seg->tcphdr, flags);
/* don't fill in tcphdr->ackno and tcphdr->wnd until later */
/* Copy the options into the header, if they are present. */
if (optdata == NULL) {
TCPH_HDRLEN_SET(seg->tcphdr, 5);
}
else {
TCPH_HDRLEN_SET(seg->tcphdr, (5 + optlen / 4));
/* Copy options into data portion of segment.
Options can thus only be sent in non data carrying
segments such as SYN|ACK. */
memcpy(seg->dataptr, optdata, optlen);
}
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | DBG_TRACE, ("tcp_enqueue: queueing %"U32_F":%"U32_F" (0x%"X16_F")\n",
ntohl(seg->tcphdr->seqno),
ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg),
(u16_t)flags));
left -= seglen;
seqno += seglen;
ptr = (void *)((u8_t *)ptr + seglen);
}
/* Now that the data to be enqueued has been broken up into TCP
segments in the queue variable, we add them to the end of the
pcb->unsent queue. */
if (pcb->unsent == NULL) {
useg = NULL;
}
else {
for (useg = pcb->unsent; useg->next != NULL; useg = useg->next);
}
/* { useg is last segment on the unsent queue, NULL if list is empty } */
/* If there is room in the last pbuf on the unsent queue,
chain the first pbuf on the queue together with that. */
if (useg != NULL &&
TCP_TCPLEN(useg) != 0 &&
!(TCPH_FLAGS(useg->tcphdr) & (TCP_SYN | TCP_FIN)) &&
!(flags & (TCP_SYN | TCP_FIN)) &&
/* fit within max seg size */
useg->len + queue->len <= pcb->mss) {
/* Remove TCP header from first segment of our to-be-queued list */
pbuf_header(queue->p, -TCP_HLEN);
pbuf_cat(useg->p, queue->p);
useg->len += queue->len;
useg->next = queue->next;
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | DBG_TRACE | DBG_STATE, ("tcp_enqueue: chaining segments, new len %"U16_F"\n", useg->len));
if (seg == queue) {
seg = NULL;
}
memp_free(MEMP_TCP_SEG, queue);
}
else {
/* empty list */
if (useg == NULL) {
/* initialize list with this segment */
pcb->unsent = queue;
}
/* enqueue segment */
else {
useg->next = queue;
}
}
if ((flags & TCP_SYN) || (flags & TCP_FIN)) {
++len;
}
pcb->snd_lbb += len;
pcb->snd_buf -= len;
/* update number of segments on the queues */
pcb->snd_queuelen = queuelen;
LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: %"S16_F" (after enqueued)\n", pcb->snd_queuelen));
if (pcb->snd_queuelen != 0) {
LWIP_ASSERT("tcp_enqueue: valid queue length",
pcb->unacked != NULL || pcb->unsent != NULL);
}
/* Set the PSH flag in the last segment that we enqueued, but only
if the segment has data (indicated by seglen > 0). */
if (seg != NULL && seglen > 0 && seg->tcphdr != NULL) {
TCPH_SET_FLAG(seg->tcphdr, TCP_PSH);
}
return ERR_OK;
memerr:
TCP_STATS_INC(tcp.memerr);
if (queue != NULL) {
tcp_segs_free(queue);
}
if (pcb->snd_queuelen != 0) {
LWIP_ASSERT("tcp_enqueue: valid queue length", pcb->unacked != NULL ||
pcb->unsent != NULL);
}
LWIP_DEBUGF(TCP_QLEN_DEBUG | DBG_STATE, ("tcp_enqueue: %"S16_F" (with mem err)\n", pcb->snd_queuelen));
return ERR_MEM;
}
/* find out what we can send and send it */
err_t
tcp_output(struct tcp_pcb *pcb)
{
struct pbuf *p;
struct tcp_hdr *tcphdr;
struct tcp_seg *seg, *useg;
u32_t wnd;
#if TCP_CWND_DEBUG
s16_t i = 0;
#endif /* TCP_CWND_DEBUG */
/* First, check if we are invoked by the TCP input processing
code. If so, we do not output anything. Instead, we rely on the
input processing code to call us when input processing is done
with. */
if (tcp_input_pcb == pcb) {
return ERR_OK;
}
wnd = LWIP_MIN(pcb->snd_wnd, pcb->cwnd);
seg = pcb->unsent;
/* useg should point to last segment on unacked queue */
useg = pcb->unacked;
if (useg != NULL) {
for (; useg->next != NULL; useg = useg->next);
}
/* If the TF_ACK_NOW flag is set and no data will be sent (either
* because the ->unsent queue is empty or because the window does
* not allow it), construct an empty ACK segment and send it.
*
* If data is to be sent, we will just piggyback the ACK (see below).
*/
if (pcb->flags & TF_ACK_NOW &&
(seg == NULL ||
ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > wnd)) {
p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
if (p == NULL) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) could not allocate pbuf\n"));
return ERR_BUF;
}
LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: sending ACK for %"U32_F"\n", pcb->rcv_nxt));
/* remove ACK flags from the PCB, as we send an empty ACK now */
pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
tcphdr = p->payload;
tcphdr->src = htons(pcb->local_port);
tcphdr->dest = htons(pcb->remote_port);
tcphdr->seqno = htonl(pcb->snd_nxt);
tcphdr->ackno = htonl(pcb->rcv_nxt);
TCPH_FLAGS_SET(tcphdr, TCP_ACK);
tcphdr->wnd = htons(pcb->rcv_wnd);
tcphdr->urgp = 0;
TCPH_HDRLEN_SET(tcphdr, 5);
tcphdr->chksum = 0;
#if CHECKSUM_GEN_TCP
tcphdr->chksum = inet_chksum_pseudo(p, &(pcb->local_ip), &(pcb->remote_ip),
IP_PROTO_TCP, p->tot_len);
#endif
ip_output(p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos,
IP_PROTO_TCP);
pbuf_free(p);
return ERR_OK;
}
#if TCP_OUTPUT_DEBUG
if (seg == NULL) {
LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: nothing to send (%p)\n", (void*)pcb->unsent));
}
#endif /* TCP_OUTPUT_DEBUG */
#if TCP_CWND_DEBUG
if (seg == NULL) {
LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"U32_F", cwnd %"U16_F", wnd %"U32_F", seg == NULL, ack %"U32_F"\n",
pcb->snd_wnd, pcb->cwnd, wnd,
pcb->lastack));
} else {
LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"U32_F", cwnd %"U16_F", wnd %"U32_F", effwnd %"U32_F", seq %"U32_F", ack %"U32_F"\n",
pcb->snd_wnd, pcb->cwnd, wnd,
ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len,
ntohl(seg->tcphdr->seqno), pcb->lastack));
}
#endif /* TCP_CWND_DEBUG */
/* data available and window allows it to be sent? */
while (seg != NULL &&
ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) {
#if TCP_CWND_DEBUG
LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"U32_F", cwnd %"U16_F", wnd %"U32_F", effwnd %"U32_F", seq %"U32_F", ack %"U32_F", i %"S16_F"\n",
pcb->snd_wnd, pcb->cwnd, wnd,
ntohl(seg->tcphdr->seqno) + seg->len -
pcb->lastack,
ntohl(seg->tcphdr->seqno), pcb->lastack, i));
++i;
#endif /* TCP_CWND_DEBUG */
pcb->unsent = seg->next;
if (pcb->state != SYN_SENT) {
TCPH_SET_FLAG(seg->tcphdr, TCP_ACK);
pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
}
tcp_output_segment(seg, pcb);
pcb->snd_nxt = ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg);
if (TCP_SEQ_LT(pcb->snd_max, pcb->snd_nxt)) {
pcb->snd_max = pcb->snd_nxt;
}
/* put segment on unacknowledged list if length > 0 */
if (TCP_TCPLEN(seg) > 0) {
seg->next = NULL;
/* unacked list is empty? */
if (pcb->unacked == NULL) {
pcb->unacked = seg;
useg = seg;
/* unacked list is not empty? */
} else {
/* In the case of fast retransmit, the packet should not go to the tail
* of the unacked queue, but rather at the head. We need to check for
* this case. -STJ Jul 27, 2004 */
if (TCP_SEQ_LT(ntohl(seg->tcphdr->seqno), ntohl(useg->tcphdr->seqno))){
/* add segment to head of unacked list */
seg->next = pcb->unacked;
pcb->unacked = seg;
} else {
/* add segment to tail of unacked list */
useg->next = seg;
useg = useg->next;
}
}
/* do not queue empty segments on the unacked list */
} else {
tcp_seg_free(seg);
}
seg = pcb->unsent;
}
return ERR_OK;
}
/**
* Actually send a TCP segment over IP
*/
static void
tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb)
{
u16_t len;
struct netif *netif;
/** @bug Exclude retransmitted segments from this count. */
snmp_inc_tcpoutsegs();
/* The TCP header has already been constructed, but the ackno and
wnd fields remain. */
seg->tcphdr->ackno = htonl(pcb->rcv_nxt);
/* silly window avoidance */
if (pcb->rcv_wnd < pcb->mss) {
seg->tcphdr->wnd = 0;
} else {
/* advertise our receive window size in this TCP segment */
seg->tcphdr->wnd = htons(pcb->rcv_wnd);
}
/* If we don't have a local IP address, we get one by
calling ip_route(). */
if (ip_addr_isany(&(pcb->local_ip))) {
netif = ip_route(&(pcb->remote_ip));
if (netif == NULL) {
return;
}
ip_addr_set(&(pcb->local_ip), &(netif->ip_addr));
}
pcb->rtime = 0;
if (pcb->rttest == 0) {
pcb->rttest = tcp_ticks;
pcb->rtseq = ntohl(seg->tcphdr->seqno);
LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_output_segment: rtseq %"U32_F"\n", pcb->rtseq));
}
LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output_segment: %"U32_F":%"U32_F"\n",
htonl(seg->tcphdr->seqno), htonl(seg->tcphdr->seqno) +
seg->len));
len = (u16_t)((u8_t *)seg->tcphdr - (u8_t *)seg->p->payload);
seg->p->len -= len;
seg->p->tot_len -= len;
seg->p->payload = seg->tcphdr;
seg->tcphdr->chksum = 0;
#if CHECKSUM_GEN_TCP
seg->tcphdr->chksum = inet_chksum_pseudo(seg->p,
&(pcb->local_ip),
&(pcb->remote_ip),
IP_PROTO_TCP, seg->p->tot_len);
#endif
TCP_STATS_INC(tcp.xmit);
ip_output(seg->p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos,
IP_PROTO_TCP);
}
void
tcp_rst(u32_t seqno, u32_t ackno,
struct ip_addr *local_ip, struct ip_addr *remote_ip,
u16_t local_port, u16_t remote_port)
{
struct pbuf *p;
struct tcp_hdr *tcphdr;
p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
if (p == NULL) {
LWIP_DEBUGF(TCP_DEBUG, ("tcp_rst: could not allocate memory for pbuf\n"));
return;
}
tcphdr = p->payload;
tcphdr->src = htons(local_port);
tcphdr->dest = htons(remote_port);
tcphdr->seqno = htonl(seqno);
tcphdr->ackno = htonl(ackno);
TCPH_FLAGS_SET(tcphdr, TCP_RST | TCP_ACK);
tcphdr->wnd = htons(TCP_WND);
tcphdr->urgp = 0;
TCPH_HDRLEN_SET(tcphdr, 5);
tcphdr->chksum = 0;
#if CHECKSUM_GEN_TCP
tcphdr->chksum = inet_chksum_pseudo(p, local_ip, remote_ip,
IP_PROTO_TCP, p->tot_len);
#endif
TCP_STATS_INC(tcp.xmit);
snmp_inc_tcpoutrsts();
/* Send output with hardcoded TTL since we have no access to the pcb */
ip_output(p, local_ip, remote_ip, TCP_TTL, 0, IP_PROTO_TCP);
pbuf_free(p);
LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_rst: seqno %"U32_F" ackno %"U32_F".\n", seqno, ackno));
}
/* requeue all unacked segments for retransmission */
void
tcp_rexmit_rto(struct tcp_pcb *pcb)
{
struct tcp_seg *seg;
if (pcb->unacked == NULL) {
return;
}
/* Move all unacked segments to the head of the unsent queue */
for (seg = pcb->unacked; seg->next != NULL; seg = seg->next);
/* concatenate unsent queue after unacked queue */
seg->next = pcb->unsent;
/* unsent queue is the concatenated queue (of unacked, unsent) */
pcb->unsent = pcb->unacked;
/* unacked queue is now empty */
pcb->unacked = NULL;
pcb->snd_nxt = ntohl(pcb->unsent->tcphdr->seqno);
/* increment number of retransmissions */
++pcb->nrtx;
/* Don't take any RTT measurements after retransmitting. */
pcb->rttest = 0;
/* Do the actual retransmission */
tcp_output(pcb);
}
void
tcp_rexmit(struct tcp_pcb *pcb)
{
struct tcp_seg *seg;
if (pcb->unacked == NULL) {
return;
}
/* Move the first unacked segment to the unsent queue */
seg = pcb->unacked->next;
pcb->unacked->next = pcb->unsent;
pcb->unsent = pcb->unacked;
pcb->unacked = seg;
pcb->snd_nxt = ntohl(pcb->unsent->tcphdr->seqno);
++pcb->nrtx;
/* Don't take any rtt measurements after retransmitting. */
pcb->rttest = 0;
/* Do the actual retransmission. */
snmp_inc_tcpretranssegs();
tcp_output(pcb);
}
void
tcp_keepalive(struct tcp_pcb *pcb)
{
struct pbuf *p;
struct tcp_hdr *tcphdr;
LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: sending KEEPALIVE probe to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip),
ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip)));
LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: tcp_ticks %"U32_F" pcb->tmr %"U32_F" pcb->keep_cnt %"U16_F"\n", tcp_ticks, pcb->tmr, pcb->keep_cnt));
p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
if(p == NULL) {
LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: could not allocate memory for pbuf\n"));
return;
}
tcphdr = p->payload;
tcphdr->src = htons(pcb->local_port);
tcphdr->dest = htons(pcb->remote_port);
tcphdr->seqno = htonl(pcb->snd_nxt - 1);
tcphdr->ackno = htonl(pcb->rcv_nxt);
tcphdr->wnd = htons(pcb->rcv_wnd);
tcphdr->urgp = 0;
TCPH_HDRLEN_SET(tcphdr, 5);
tcphdr->chksum = 0;
#if CHECKSUM_GEN_TCP
tcphdr->chksum = inet_chksum_pseudo(p, &pcb->local_ip, &pcb->remote_ip, IP_PROTO_TCP, p->tot_len);
#endif
TCP_STATS_INC(tcp.xmit);
/* Send output to IP */
ip_output(p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, 0, IP_PROTO_TCP);
pbuf_free(p);
LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_keepalive: seqno %"U32_F" ackno %"U32_F".\n", pcb->snd_nxt - 1, pcb->rcv_nxt));
}
#endif /* LWIP_TCP */

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@ -0,0 +1,665 @@
/**
* @file
* User Datagram Protocol module
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/* udp.c
*
* The code for the User Datagram Protocol UDP.
*
*/
#include <string.h>
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/memp.h"
#include "lwip/inet.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/udp.h"
#include "lwip/icmp.h"
#include "lwip/stats.h"
#include "arch/perf.h"
#include "lwip/snmp.h"
/* The list of UDP PCBs */
#if LWIP_UDP
/* exported in udp.h (was static) */
struct udp_pcb *udp_pcbs = NULL;
static struct udp_pcb *pcb_cache = NULL;
void
udp_init(void)
{
udp_pcbs = pcb_cache = NULL;
}
/**
* Process an incoming UDP datagram.
*
* Given an incoming UDP datagram (as a chain of pbufs) this function
* finds a corresponding UDP PCB and
*
* @param pbuf pbuf to be demultiplexed to a UDP PCB.
* @param netif network interface on which the datagram was received.
*
*/
void
udp_input(struct pbuf *p, struct netif *inp)
{
struct udp_hdr *udphdr;
struct udp_pcb *pcb;
struct udp_pcb *uncon_pcb;
struct ip_hdr *iphdr;
u16_t src, dest;
u8_t local_match;
PERF_START;
UDP_STATS_INC(udp.recv);
iphdr = p->payload;
if (p->tot_len < (IPH_HL(iphdr) * 4 + UDP_HLEN)) {
/* drop short packets */
// LWIP_DEBUGF(UDP_DEBUG,
// ("udp_input: short UDP datagram (%"U16_F" bytes) discarded\n", p->tot_len));
LWIP_DEBUGF(UDP_DEBUG,
("udp_input: short UDP datagram (%u bytes) discarded\n", p->tot_len));
UDP_STATS_INC(udp.lenerr);
UDP_STATS_INC(udp.drop);
snmp_inc_udpinerrors();
pbuf_free(p);
goto end;
}
pbuf_header(p, -((s16_t)(IPH_HL(iphdr) * 4)));
udphdr = (struct udp_hdr *)p->payload;
LWIP_DEBUGF(UDP_DEBUG, ("udp_input: received datagram of length %"U16_F"\n", p->tot_len));
src = ntohs(udphdr->src);
dest = ntohs(udphdr->dest);
udp_debug_print(udphdr);
/* print the UDP source and destination */
LWIP_DEBUGF(UDP_DEBUG,
("udp (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") <-- "
"(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n",
ip4_addr1(&iphdr->dest), ip4_addr2(&iphdr->dest),
ip4_addr3(&iphdr->dest), ip4_addr4(&iphdr->dest), ntohs(udphdr->dest),
ip4_addr1(&iphdr->src), ip4_addr2(&iphdr->src),
ip4_addr3(&iphdr->src), ip4_addr4(&iphdr->src), ntohs(udphdr->src)));
local_match = 0;
uncon_pcb = NULL;
/* Iterate through the UDP pcb list for a matching pcb */
for (pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) {
/* print the PCB local and remote address */
LWIP_DEBUGF(UDP_DEBUG,
("pcb (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") --- "
"(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n",
ip4_addr1(&pcb->local_ip), ip4_addr2(&pcb->local_ip),
ip4_addr3(&pcb->local_ip), ip4_addr4(&pcb->local_ip), pcb->local_port,
ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip),
ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip), pcb->remote_port));
/* compare PCB local addr+port to UDP destination addr+port */
if ((pcb->local_port == dest) &&
(ip_addr_isany(&pcb->local_ip) ||
ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)) ||
ip_addr_isbroadcast(&(iphdr->dest), inp))) {
local_match = 1;
if ((uncon_pcb == NULL) &&
((pcb->flags & UDP_FLAGS_CONNECTED) == 0)) {
/* the first unconnected matching PCB */
uncon_pcb = pcb;
}
}
/* compare PCB remote addr+port to UDP source addr+port */
if ((local_match != 0) &&
(pcb->remote_port == src) &&
(ip_addr_isany(&pcb->remote_ip) ||
ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src)))) {
/* the first fully matching PCB */
break;
}
}
/* no fully matching pcb found? then look for an unconnected pcb */
if (pcb == NULL) {
pcb = uncon_pcb;
}
/* Check checksum if this is a match or if it was directed at us. */
if (pcb != NULL || ip_addr_cmp(&inp->ip_addr, &iphdr->dest)) {
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE, ("udp_input: calculating checksum\n"));
#ifdef IPv6
if (iphdr->nexthdr == IP_PROTO_UDPLITE) {
#else
if (IPH_PROTO(iphdr) == IP_PROTO_UDPLITE) {
#endif /* IPv4 */
/* Do the UDP Lite checksum */
#if CHECKSUM_CHECK_UDP
if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src),
(struct ip_addr *)&(iphdr->dest),
IP_PROTO_UDPLITE, ntohs(udphdr->len)) != 0) {
LWIP_DEBUGF(UDP_DEBUG | 2,
("udp_input: UDP Lite datagram discarded due to failing checksum\n"));
UDP_STATS_INC(udp.chkerr);
UDP_STATS_INC(udp.drop);
snmp_inc_udpinerrors();
pbuf_free(p);
goto end;
}
#endif
} else {
#if CHECKSUM_CHECK_UDP
if (udphdr->chksum != 0) {
if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src),
(struct ip_addr *)&(iphdr->dest),
IP_PROTO_UDP, p->tot_len) != 0) {
LWIP_DEBUGF(UDP_DEBUG | 2,
("udp_input: UDP datagram discarded due to failing checksum\n"));
UDP_STATS_INC(udp.chkerr);
UDP_STATS_INC(udp.drop);
snmp_inc_udpinerrors();
pbuf_free(p);
goto end;
}
}
#endif
}
pbuf_header(p, -UDP_HLEN);
if (pcb != NULL) {
snmp_inc_udpindatagrams();
/* callback */
if (pcb->recv != NULL)
pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src), src);
} else {
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE, ("udp_input: not for us.\n"));
/* No match was found, send ICMP destination port unreachable unless
destination address was broadcast/multicast. */
if (!ip_addr_isbroadcast(&iphdr->dest, inp) &&
!ip_addr_ismulticast(&iphdr->dest)) {
/* restore pbuf pointer */
p->payload = iphdr;
icmp_dest_unreach(p, ICMP_DUR_PORT);
}
UDP_STATS_INC(udp.proterr);
UDP_STATS_INC(udp.drop);
snmp_inc_udpnoports();
pbuf_free(p);
}
} else {
pbuf_free(p);
}
end:
PERF_STOP("udp_input");
}
/**
* Send data to a specified address using UDP.
*
* @param pcb UDP PCB used to send the data.
* @param pbuf chain of pbuf's to be sent.
* @param dst_ip Destination IP address.
* @param dst_port Destination UDP port.
*
* If the PCB already has a remote address association, it will
* be restored after the data is sent.
*
* @return lwIP error code.
* - ERR_OK. Successful. No error occured.
* - ERR_MEM. Out of memory.
* - ERR_RTE. Could not find route to destination address.
*
* @see udp_disconnect() udp_send()
*/
err_t
udp_sendto(struct udp_pcb *pcb, struct pbuf *p,
struct ip_addr *dst_ip, u16_t dst_port)
{
err_t err;
/* temporary space for current PCB remote address */
struct ip_addr pcb_remote_ip;
u16_t pcb_remote_port;
/* remember current remote peer address of PCB */
pcb_remote_ip.addr = pcb->remote_ip.addr;
pcb_remote_port = pcb->remote_port;
/* copy packet destination address to PCB remote peer address */
pcb->remote_ip.addr = dst_ip->addr;
pcb->remote_port = dst_port;
/* send to the packet destination address */
err = udp_send(pcb, p);
/* restore PCB remote peer address */
pcb->remote_ip.addr = pcb_remote_ip.addr;
pcb->remote_port = pcb_remote_port;
return err;
}
/**
* Send data using UDP.
*
* @param pcb UDP PCB used to send the data.
* @param pbuf chain of pbuf's to be sent.
*
* @return lwIP error code.
* - ERR_OK. Successful. No error occured.
* - ERR_MEM. Out of memory.
* - ERR_RTE. Could not find route to destination address.
*
* @see udp_disconnect() udp_sendto()
*/
err_t
udp_send(struct udp_pcb *pcb, struct pbuf *p)
{
struct udp_hdr *udphdr;
struct netif *netif;
struct ip_addr *src_ip;
err_t err;
struct pbuf *q; /* q will be sent down the stack */
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 3, ("udp_send\n"));
/* if the PCB is not yet bound to a port, bind it here */
if (pcb->local_port == 0) {
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: not yet bound to a port, binding now\n"));
err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
if (err != ERR_OK) {
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: forced port bind failed\n"));
return err;
}
}
/* find the outgoing network interface for this packet */
netif = ip_route(&(pcb->remote_ip));
/* no outgoing network interface could be found? */
if (netif == NULL) {
LWIP_DEBUGF(UDP_DEBUG | 1, ("udp_send: No route to 0x%"X32_F"\n", pcb->remote_ip.addr));
UDP_STATS_INC(udp.rterr);
return ERR_RTE;
}
/* not enough space to add an UDP header to first pbuf in given p chain? */
if (pbuf_header(p, UDP_HLEN)) {
/* allocate header in a seperate new pbuf */
q = pbuf_alloc(PBUF_IP, UDP_HLEN, PBUF_RAM);
/* new header pbuf could not be allocated? */
if (q == NULL) {
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 2, ("udp_send: could not allocate header\n"));
return ERR_MEM;
}
/* chain header q in front of given pbuf p */
pbuf_chain(q, p);
/* first pbuf q points to header pbuf */
LWIP_DEBUGF(UDP_DEBUG,
("udp_send: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
/* adding a header within p succeeded */
} else {
/* first pbuf q equals given pbuf */
q = p;
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header in given pbuf %p\n", (void *)p));
}
/* q now represents the packet to be sent */
udphdr = q->payload;
udphdr->src = htons(pcb->local_port);
udphdr->dest = htons(pcb->remote_port);
/* in UDP, 0 checksum means 'no checksum' */
udphdr->chksum = 0x0000;
/* PCB local address is IP_ANY_ADDR? */
if (ip_addr_isany(&pcb->local_ip)) {
/* use outgoing network interface IP address as source address */
src_ip = &(netif->ip_addr);
} else {
/* use UDP PCB local IP address as source address */
src_ip = &(pcb->local_ip);
}
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %"U16_F"\n", q->tot_len));
/* UDP Lite protocol? */
if (pcb->flags & UDP_FLAGS_UDPLITE) {
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %"U16_F"\n", q->tot_len));
/* set UDP message length in UDP header */
udphdr->len = htons(pcb->chksum_len);
/* calculate checksum */
#if CHECKSUM_GEN_UDP
udphdr->chksum = inet_chksum_pseudo(q, src_ip, &(pcb->remote_ip),
IP_PROTO_UDP, pcb->chksum_len);
/* chksum zero must become 0xffff, as zero means 'no checksum' */
if (udphdr->chksum == 0x0000)
udphdr->chksum = 0xffff;
#else
udphdr->chksum = 0x0000;
#endif
/* output to IP */
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDPLITE,)\n"));
err = ip_output_if(q, src_ip, &pcb->remote_ip, pcb->ttl, pcb->tos, IP_PROTO_UDPLITE, netif);
} else { /* UDP */
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %"U16_F"\n", q->tot_len));
udphdr->len = htons(q->tot_len);
/* calculate checksum */
#if CHECKSUM_GEN_UDP
if ((pcb->flags & UDP_FLAGS_NOCHKSUM) == 0) {
udphdr->chksum = inet_chksum_pseudo(q, src_ip, &pcb->remote_ip, IP_PROTO_UDP, q->tot_len);
/* chksum zero must become 0xffff, as zero means 'no checksum' */
if (udphdr->chksum == 0x0000) udphdr->chksum = 0xffff;
}
#else
udphdr->chksum = 0x0000;
#endif
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04"X16_F"\n", udphdr->chksum));
LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDP,)\n"));
/* output to IP */
err = ip_output_if(q, src_ip, &pcb->remote_ip, pcb->ttl, pcb->tos, IP_PROTO_UDP, netif);
}
/* TODO: must this be increased even if error occured? */
snmp_inc_udpoutdatagrams();
/* did we chain a seperate header pbuf earlier? */
if (q != p) {
/* free the header pbuf */
pbuf_free(q);
q = NULL;
/* p is still referenced by the caller, and will live on */
}
UDP_STATS_INC(udp.xmit);
return err;
}
/**
* Bind an UDP PCB.
*
* @param pcb UDP PCB to be bound with a local address ipaddr and port.
* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
* bind to all local interfaces.
* @param port local UDP port to bind with.
*
* @return lwIP error code.
* - ERR_OK. Successful. No error occured.
* - ERR_USE. The specified ipaddr and port are already bound to by
* another UDP PCB.
*
* @see udp_disconnect()
*/
err_t
udp_bind(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
{
struct udp_pcb *ipcb;
u8_t rebind;
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 3, ("udp_bind(ipaddr = "));
ip_addr_debug_print(UDP_DEBUG, ipaddr);
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | 3, (", port = %"U16_F")\n", port));
rebind = 0;
/* Check for double bind and rebind of the same pcb */
for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
/* is this UDP PCB already on active list? */
if (pcb == ipcb) {
/* pcb may occur at most once in active list */
LWIP_ASSERT("rebind == 0", rebind == 0);
/* pcb already in list, just rebind */
rebind = 1;
}
/* this code does not allow upper layer to share a UDP port for
listening to broadcast or multicast traffic (See SO_REUSE_ADDR and
SO_REUSE_PORT under *BSD). TODO: See where it fits instead, OR
combine with implementation of UDP PCB flags. Leon Woestenberg. */
#ifdef LWIP_UDP_TODO
/* port matches that of PCB in list? */
else
if ((ipcb->local_port == port) &&
/* IP address matches, or one is IP_ADDR_ANY? */
(ip_addr_isany(&(ipcb->local_ip)) ||
ip_addr_isany(ipaddr) ||
ip_addr_cmp(&(ipcb->local_ip), ipaddr))) {
/* other PCB already binds to this local IP and port */
LWIP_DEBUGF(UDP_DEBUG,
("udp_bind: local port %"U16_F" already bound by another pcb\n", port));
return ERR_USE;
}
#endif
}
ip_addr_set(&pcb->local_ip, ipaddr);
/* no port specified? */
if (port == 0) {
#ifndef UDP_LOCAL_PORT_RANGE_START
#define UDP_LOCAL_PORT_RANGE_START 4096
#define UDP_LOCAL_PORT_RANGE_END 0x7fff
#endif
port = UDP_LOCAL_PORT_RANGE_START;
ipcb = udp_pcbs;
while ((ipcb != NULL) && (port != UDP_LOCAL_PORT_RANGE_END)) {
if (ipcb->local_port == port) {
port++;
ipcb = udp_pcbs;
} else
ipcb = ipcb->next;
}
if (ipcb != NULL) {
/* no more ports available in local range */
LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: out of free UDP ports\n"));
return ERR_USE;
}
}
pcb->local_port = port;
snmp_insert_udpidx_tree(pcb);
/* pcb not active yet? */
if (rebind == 0) {
/* place the PCB on the active list if not already there */
pcb->next = udp_pcbs;
udp_pcbs = pcb;
}
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | DBG_STATE,
("udp_bind: bound to %"U16_F".%"U16_F".%"U16_F".%"U16_F", port %"U16_F"\n",
(u16_t)(ntohl(pcb->local_ip.addr) >> 24 & 0xff),
(u16_t)(ntohl(pcb->local_ip.addr) >> 16 & 0xff),
(u16_t)(ntohl(pcb->local_ip.addr) >> 8 & 0xff),
(u16_t)(ntohl(pcb->local_ip.addr) & 0xff), pcb->local_port));
return ERR_OK;
}
/**
* Connect an UDP PCB.
*
* This will associate the UDP PCB with the remote address.
*
* @param pcb UDP PCB to be connected with remote address ipaddr and port.
* @param ipaddr remote IP address to connect with.
* @param port remote UDP port to connect with.
*
* @return lwIP error code
*
* @see udp_disconnect()
*/
err_t
udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
{
struct udp_pcb *ipcb;
if (pcb->local_port == 0) {
err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
if (err != ERR_OK)
return err;
}
ip_addr_set(&pcb->remote_ip, ipaddr);
pcb->remote_port = port;
pcb->flags |= UDP_FLAGS_CONNECTED;
/** TODO: this functionality belongs in upper layers */
#ifdef LWIP_UDP_TODO
/* Nail down local IP for netconn_addr()/getsockname() */
if (ip_addr_isany(&pcb->local_ip) && !ip_addr_isany(&pcb->remote_ip)) {
struct netif *netif;
if ((netif = ip_route(&(pcb->remote_ip))) == NULL) {
LWIP_DEBUGF(UDP_DEBUG, ("udp_connect: No route to 0x%lx\n", pcb->remote_ip.addr));
UDP_STATS_INC(udp.rterr);
return ERR_RTE;
}
/** TODO: this will bind the udp pcb locally, to the interface which
is used to route output packets to the remote address. However, we
might want to accept incoming packets on any interface! */
pcb->local_ip = netif->ip_addr;
} else if (ip_addr_isany(&pcb->remote_ip)) {
pcb->local_ip.addr = 0;
}
#endif
LWIP_DEBUGF(UDP_DEBUG | DBG_TRACE | DBG_STATE,
("udp_connect: connected to %"U16_F".%"U16_F".%"U16_F".%"U16_F",port %"U16_F"\n",
(u16_t)(ntohl(pcb->remote_ip.addr) >> 24 & 0xff),
(u16_t)(ntohl(pcb->remote_ip.addr) >> 16 & 0xff),
(u16_t)(ntohl(pcb->remote_ip.addr) >> 8 & 0xff),
(u16_t)(ntohl(pcb->remote_ip.addr) & 0xff), pcb->remote_port));
/* Insert UDP PCB into the list of active UDP PCBs. */
for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
if (pcb == ipcb) {
/* already on the list, just return */
return ERR_OK;
}
}
/* PCB not yet on the list, add PCB now */
pcb->next = udp_pcbs;
udp_pcbs = pcb;
return ERR_OK;
}
void
udp_disconnect(struct udp_pcb *pcb)
{
/* reset remote address association */
ip_addr_set(&pcb->remote_ip, IP_ADDR_ANY);
pcb->remote_port = 0;
/* mark PCB as unconnected */
pcb->flags &= ~UDP_FLAGS_CONNECTED;
}
void
udp_recv(struct udp_pcb *pcb,
void (* recv)(void *arg, struct udp_pcb *upcb, struct pbuf *p,
struct ip_addr *addr, u16_t port),
void *recv_arg)
{
/* remember recv() callback and user data */
pcb->recv = recv;
pcb->recv_arg = recv_arg;
}
/**
* Remove an UDP PCB.
*
* @param pcb UDP PCB to be removed. The PCB is removed from the list of
* UDP PCB's and the data structure is freed from memory.
*
* @see udp_new()
*/
void
udp_remove(struct udp_pcb *pcb)
{
struct udp_pcb *pcb2;
snmp_delete_udpidx_tree(pcb);
/* pcb to be removed is first in list? */
if (udp_pcbs == pcb) {
/* make list start at 2nd pcb */
udp_pcbs = udp_pcbs->next;
/* pcb not 1st in list */
} else
for (pcb2 = udp_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
/* find pcb in udp_pcbs list */
if (pcb2->next != NULL && pcb2->next == pcb) {
/* remove pcb from list */
pcb2->next = pcb->next;
}
}
memp_free(MEMP_UDP_PCB, pcb);
}
/**
* Create a UDP PCB.
*
* @return The UDP PCB which was created. NULL if the PCB data structure
* could not be allocated.
*
* @see udp_remove()
*/
struct udp_pcb *
udp_new(void)
{
struct udp_pcb *pcb;
pcb = memp_malloc(MEMP_UDP_PCB);
/* could allocate UDP PCB? */
if (pcb != NULL) {
/* initialize PCB to all zeroes */
memset(pcb, 0, sizeof(struct udp_pcb));
pcb->ttl = UDP_TTL;
}
return pcb;
}
#if UDP_DEBUG
void
udp_debug_print(struct udp_hdr *udphdr)
{
LWIP_DEBUGF(UDP_DEBUG, ("UDP header:\n"));
LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(UDP_DEBUG, ("| %5"U16_F" | %5"U16_F" | (src port, dest port)\n",
ntohs(udphdr->src), ntohs(udphdr->dest)));
LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
LWIP_DEBUGF(UDP_DEBUG, ("| %5"U16_F" | 0x%04"X16_F" | (len, chksum)\n",
ntohs(udphdr->len), ntohs(udphdr->chksum)));
LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
}
#endif /* UDP_DEBUG */
#endif /* LWIP_UDP */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_ICMP_H__
#define __LWIP_ICMP_H__
#include "lwip/arch.h"
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#define ICMP_ER 0 /* echo reply */
#define ICMP_DUR 3 /* destination unreachable */
#define ICMP_SQ 4 /* source quench */
#define ICMP_RD 5 /* redirect */
#define ICMP_ECHO 8 /* echo */
#define ICMP_TE 11 /* time exceeded */
#define ICMP_PP 12 /* parameter problem */
#define ICMP_TS 13 /* timestamp */
#define ICMP_TSR 14 /* timestamp reply */
#define ICMP_IRQ 15 /* information request */
#define ICMP_IR 16 /* information reply */
enum icmp_dur_type {
ICMP_DUR_NET = 0, /* net unreachable */
ICMP_DUR_HOST = 1, /* host unreachable */
ICMP_DUR_PROTO = 2, /* protocol unreachable */
ICMP_DUR_PORT = 3, /* port unreachable */
ICMP_DUR_FRAG = 4, /* fragmentation needed and DF set */
ICMP_DUR_SR = 5 /* source route failed */
};
enum icmp_te_type {
ICMP_TE_TTL = 0, /* time to live exceeded in transit */
ICMP_TE_FRAG = 1 /* fragment reassembly time exceeded */
};
void icmp_input(struct pbuf *p, struct netif *inp);
void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct icmp_echo_hdr {
PACK_STRUCT_FIELD(u16_t _type_code);
PACK_STRUCT_FIELD(u16_t chksum);
PACK_STRUCT_FIELD(u16_t id);
PACK_STRUCT_FIELD(u16_t seqno);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
PACK_STRUCT_BEGIN
struct icmp_dur_hdr {
PACK_STRUCT_FIELD(u16_t _type_code);
PACK_STRUCT_FIELD(u16_t chksum);
PACK_STRUCT_FIELD(u32_t unused);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
PACK_STRUCT_BEGIN
struct icmp_te_hdr {
PACK_STRUCT_FIELD(u16_t _type_code);
PACK_STRUCT_FIELD(u16_t chksum);
PACK_STRUCT_FIELD(u32_t unused);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#define ICMPH_TYPE(hdr) (ntohs((hdr)->_type_code) >> 8)
#define ICMPH_CODE(hdr) (ntohs((hdr)->_type_code) & 0xff)
#define ICMPH_TYPE_SET(hdr, type) ((hdr)->_type_code = htons(ICMPH_CODE(hdr) | ((type) << 8)))
#define ICMPH_CODE_SET(hdr, code) ((hdr)->_type_code = htons((code) | (ICMPH_TYPE(hdr) << 8)))
#endif /* __LWIP_ICMP_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_INET_H__
#define __LWIP_INET_H__
#include "lwip/arch.h"
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
u16_t inet_chksum(void *dataptr, u16_t len);
#if 0 /* optimized routine */
u16_t inet_chksum4(u8_t *dataptr, u16_t len);
#endif
u16_t inet_chksum_pbuf(struct pbuf *p);
u16_t inet_chksum_pseudo(struct pbuf *p,
struct ip_addr *src, struct ip_addr *dest,
u8_t proto, u16_t proto_len);
u32_t inet_addr(const char *cp);
int inet_aton(const char *cp, struct in_addr *addr);
char *inet_ntoa(struct in_addr addr); /* returns ptr to static buffer; not reentrant! */
#ifdef htons
#undef htons
#endif /* htons */
#ifdef htonl
#undef htonl
#endif /* htonl */
#ifdef ntohs
#undef ntohs
#endif /* ntohs */
#ifdef ntohl
#undef ntohl
#endif /* ntohl */
#ifndef LWIP_PLATFORM_BYTESWAP
#define LWIP_PLATFORM_BYTESWAP 0
#endif
#if BYTE_ORDER == BIG_ENDIAN
#define htons(x) (x)
#define ntohs(x) (x)
#define htonl(x) (x)
#define ntohl(x) (x)
#else /* BYTE_ORDER != BIG_ENDIAN */
#ifdef LWIP_PREFIX_BYTEORDER_FUNCS
/* workaround for naming collisions on some platforms */
#define htons lwip_htons
#define ntohs lwip_ntohs
#define htonl lwip_htonl
#define ntohl lwip_ntohl
#endif
#if LWIP_PLATFORM_BYTESWAP
#define htons(x) LWIP_PLATFORM_HTONS(x)
#define ntohs(x) LWIP_PLATFORM_HTONS(x)
#define htonl(x) LWIP_PLATFORM_HTONL(x)
#define ntohl(x) LWIP_PLATFORM_HTONL(x)
#else
u16_t htons(u16_t x);
u16_t ntohs(u16_t x);
u32_t htonl(u32_t x);
u32_t ntohl(u32_t x);
#endif
#endif
#endif /* __LWIP_INET_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_IP_H__
#define __LWIP_IP_H__
#include "lwip/arch.h"
#include "lwip/def.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"
#include "lwip/err.h"
void ip_init(void);
struct netif *ip_route(struct ip_addr *dest);
err_t ip_input(struct pbuf *p, struct netif *inp);
err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
u8_t ttl, u8_t tos, u8_t proto);
err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
u8_t ttl, u8_t tos, u8_t proto,
struct netif *netif);
#define IP_HLEN 20
#define IP_PROTO_ICMP 1
#define IP_PROTO_UDP 17
#define IP_PROTO_UDPLITE 136
#define IP_PROTO_TCP 6
/* This is passed as the destination address to ip_output_if (not
to ip_output), meaning that an IP header already is constructed
in the pbuf. This is used when TCP retransmits. */
#ifdef IP_HDRINCL
#undef IP_HDRINCL
#endif /* IP_HDRINCL */
#define IP_HDRINCL NULL
/* This is the common part of all PCB types. It needs to be at the
beginning of a PCB type definition. It is located here so that
changes to this common part are made in one location instead of
having to change all PCB structs. */
#define IP_PCB struct ip_addr local_ip; \
struct ip_addr remote_ip; \
/* Socket options */ \
u16_t so_options; \
/* Type Of Service */ \
u8_t tos; \
/* Time To Live */ \
u8_t ttl
/*
* Option flags per-socket. These are the same like SO_XXX.
*/
#define SOF_DEBUG (u16_t)0x0001U /* turn on debugging info recording */
#define SOF_ACCEPTCONN (u16_t)0x0002U /* socket has had listen() */
#define SOF_REUSEADDR (u16_t)0x0004U /* allow local address reuse */
#define SOF_KEEPALIVE (u16_t)0x0008U /* keep connections alive */
#define SOF_DONTROUTE (u16_t)0x0010U /* just use interface addresses */
#define SOF_BROADCAST (u16_t)0x0020U /* permit sending of broadcast msgs */
#define SOF_USELOOPBACK (u16_t)0x0040U /* bypass hardware when possible */
#define SOF_LINGER (u16_t)0x0080U /* linger on close if data present */
#define SOF_OOBINLINE (u16_t)0x0100U /* leave received OOB data in line */
#define SOF_REUSEPORT (u16_t)0x0200U /* allow local address & port reuse */
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct ip_hdr {
/* version / header length / type of service */
PACK_STRUCT_FIELD(u16_t _v_hl_tos);
/* total length */
PACK_STRUCT_FIELD(u16_t _len);
/* identification */
PACK_STRUCT_FIELD(u16_t _id);
/* fragment offset field */
PACK_STRUCT_FIELD(u16_t _offset);
#define IP_RF 0x8000 /* reserved fragment flag */
#define IP_DF 0x4000 /* dont fragment flag */
#define IP_MF 0x2000 /* more fragments flag */
#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
/* time to live / protocol*/
PACK_STRUCT_FIELD(u16_t _ttl_proto);
/* checksum */
PACK_STRUCT_FIELD(u16_t _chksum);
/* source and destination IP addresses */
PACK_STRUCT_FIELD(struct ip_addr src);
PACK_STRUCT_FIELD(struct ip_addr dest);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#define IPH_V(hdr) (ntohs((hdr)->_v_hl_tos) >> 12)
#define IPH_HL(hdr) ((ntohs((hdr)->_v_hl_tos) >> 8) & 0x0f)
#define IPH_TOS(hdr) (ntohs((hdr)->_v_hl_tos) & 0xff)
#define IPH_LEN(hdr) ((hdr)->_len)
#define IPH_ID(hdr) ((hdr)->_id)
#define IPH_OFFSET(hdr) ((hdr)->_offset)
#define IPH_TTL(hdr) (ntohs((hdr)->_ttl_proto) >> 8)
#define IPH_PROTO(hdr) (ntohs((hdr)->_ttl_proto) & 0xff)
#define IPH_CHKSUM(hdr) ((hdr)->_chksum)
#define IPH_VHLTOS_SET(hdr, v, hl, tos) (hdr)->_v_hl_tos = (htons(((v) << 12) | ((hl) << 8) | (tos)))
#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len)
#define IPH_ID_SET(hdr, id) (hdr)->_id = (id)
#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off)
#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl_proto = (htons(IPH_PROTO(hdr) | ((u16_t)(ttl) << 8)))
#define IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (htons((proto) | (IPH_TTL(hdr) << 8)))
#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
#if IP_DEBUG
void ip_debug_print(struct pbuf *p);
#else
#define ip_debug_print(p)
#endif /* IP_DEBUG */
#endif /* __LWIP_IP_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_IP_ADDR_H__
#define __LWIP_IP_ADDR_H__
#include "lwip/arch.h"
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct ip_addr {
PACK_STRUCT_FIELD(u32_t addr);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
/*
* struct ipaddr2 is used in the definition of the ARP packet format in
* order to support compilers that don't have structure packing.
*/
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct ip_addr2 {
PACK_STRUCT_FIELD(u16_t addrw[2]);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
/* For compatibility with BSD code */
struct in_addr {
u32_t s_addr;
};
struct netif;
extern const struct ip_addr ip_addr_any;
extern const struct ip_addr ip_addr_broadcast;
/** IP_ADDR_ can be used as a fixed IP address
* for the wildcard and the broadcast address
*/
#define IP_ADDR_ANY ((struct ip_addr *)&ip_addr_any)
#define IP_ADDR_BROADCAST ((struct ip_addr *)&ip_addr_broadcast)
#define INADDR_NONE ((u32_t)0xffffffff) /* 255.255.255.255 */
#define INADDR_LOOPBACK ((u32_t)0x7f000001) /* 127.0.0.1 */
/* Definitions of the bits in an Internet address integer.
On subnets, host and network parts are found according to
the subnet mask, not these masks. */
#define IN_CLASSA(a) ((((u32_t)(a)) & 0x80000000) == 0)
#define IN_CLASSA_NET 0xff000000
#define IN_CLASSA_NSHIFT 24
#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
#define IN_CLASSA_MAX 128
#define IN_CLASSB(a) ((((u32_t)(a)) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET 0xffff0000
#define IN_CLASSB_NSHIFT 16
#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
#define IN_CLASSB_MAX 65536
#define IN_CLASSC(a) ((((u32_t)(a)) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET 0xffffff00
#define IN_CLASSC_NSHIFT 8
#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
#define IN_CLASSD(a) (((u32_t)(a) & 0xf0000000) == 0xe0000000)
#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */
#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */
#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */
#define IN_MULTICAST(a) IN_CLASSD(a)
#define IN_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000) == 0xf0000000)
#define IN_BADCLASS(a) (((u32_t)(a) & 0xf0000000) == 0xf0000000)
#define IN_LOOPBACKNET 127 /* official! */
#define IP4_ADDR(ipaddr, a,b,c,d) \
(ipaddr)->addr = htonl(((u32_t)((a) & 0xff) << 24) | \
((u32_t)((b) & 0xff) << 16) | \
((u32_t)((c) & 0xff) << 8) | \
(u32_t)((d) & 0xff))
#define ip_addr_set(dest, src) (dest)->addr = \
((src) == NULL? 0:\
(src)->addr)
/**
* Determine if two address are on the same network.
*
* @arg addr1 IP address 1
* @arg addr2 IP address 2
* @arg mask network identifier mask
* @return !0 if the network identifiers of both address match
*/
#define ip_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \
(mask)->addr) == \
((addr2)->addr & \
(mask)->addr))
#define ip_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr)
#define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == 0)
u8_t ip_addr_isbroadcast(struct ip_addr *, struct netif *);
#define ip_addr_ismulticast(addr1) (((addr1)->addr & ntohl(0xf0000000)) == ntohl(0xe0000000))
#define ip_addr_debug_print(debug, ipaddr) \
LWIP_DEBUGF(debug, ("%"U16_F".%"U16_F".%"U16_F".%"U16_F, \
ipaddr ? (u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff : 0, \
ipaddr ? (u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff : 0, \
ipaddr ? (u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff : 0, \
ipaddr ? (u16_t)ntohl((ipaddr)->addr) & 0xff : 0))
/* These are cast to u16_t, with the intent that they are often arguments
* to printf using the U16_F format from cc.h. */
#define ip4_addr1(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff)
#define ip4_addr2(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff)
#define ip4_addr3(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff)
#define ip4_addr4(ipaddr) ((u16_t)(ntohl((ipaddr)->addr)) & 0xff)
#endif /* __LWIP_IP_ADDR_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Jani Monoses <jani@iv.ro>
*
*/
#ifndef __LWIP_IP_FRAG_H__
#define __LWIP_IP_FRAG_H__
#include "lwip/opt.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#include "lwip/netif.h"
#include "lwip/ip_addr.h"
void ip_frag_init(void);
void ip_reass_tmr(void);
struct pbuf * ip_reass(struct pbuf *p);
err_t ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest);
#endif /* __LWIP_IP_FRAG_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_API_H__
#define __LWIP_API_H__
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include "lwip/ip.h"
#include "lwip/raw.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/err.h"
#define NETCONN_NOCOPY 0x00
#define NETCONN_COPY 0x01
enum netconn_type {
NETCONN_TCP,
NETCONN_UDP,
NETCONN_UDPLITE,
NETCONN_UDPNOCHKSUM,
NETCONN_RAW
};
enum netconn_state {
NETCONN_NONE,
NETCONN_WRITE,
NETCONN_ACCEPT,
NETCONN_RECV,
NETCONN_CONNECT,
NETCONN_CLOSE
};
enum netconn_evt {
NETCONN_EVT_RCVPLUS,
NETCONN_EVT_RCVMINUS,
NETCONN_EVT_SENDPLUS,
NETCONN_EVT_SENDMINUS
};
struct netbuf {
struct pbuf *p, *ptr;
struct ip_addr *fromaddr;
u16_t fromport;
err_t err;
};
struct netconn {
enum netconn_type type;
enum netconn_state state;
union {
struct tcp_pcb *tcp;
struct udp_pcb *udp;
struct raw_pcb *raw;
} pcb;
err_t err;
sys_mbox_t mbox;
sys_mbox_t recvmbox;
sys_mbox_t acceptmbox;
sys_sem_t sem;
int socket;
u16_t recv_avail;
void (* callback)(struct netconn *, enum netconn_evt, u16_t len);
};
/* Network buffer functions: */
struct netbuf * netbuf_new (void);
void netbuf_delete (struct netbuf *buf);
void * netbuf_alloc (struct netbuf *buf, u16_t size);
void netbuf_free (struct netbuf *buf);
void netbuf_ref (struct netbuf *buf,
void *dataptr, u16_t size);
void netbuf_chain (struct netbuf *head,
struct netbuf *tail);
u16_t netbuf_len (struct netbuf *buf);
err_t netbuf_data (struct netbuf *buf,
void **dataptr, u16_t *len);
s8_t netbuf_next (struct netbuf *buf);
void netbuf_first (struct netbuf *buf);
void netbuf_copy (struct netbuf *buf,
void *dataptr, u16_t len);
void netbuf_copy_partial(struct netbuf *buf, void *dataptr,
u16_t len, u16_t offset);
struct ip_addr * netbuf_fromaddr (struct netbuf *buf);
u16_t netbuf_fromport (struct netbuf *buf);
/* Network connection functions: */
struct netconn * netconn_new (enum netconn_type type);
struct
netconn *netconn_new_with_callback(enum netconn_type t,
void (*callback)(struct netconn *, enum netconn_evt, u16_t len));
struct
netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u16_t proto,
void (*callback)(struct netconn *, enum netconn_evt, u16_t len));
err_t netconn_delete (struct netconn *conn);
enum netconn_type netconn_type (struct netconn *conn);
err_t netconn_peer (struct netconn *conn,
struct ip_addr *addr,
u16_t *port);
err_t netconn_addr (struct netconn *conn,
struct ip_addr **addr,
u16_t *port);
err_t netconn_bind (struct netconn *conn,
struct ip_addr *addr,
u16_t port);
err_t netconn_connect (struct netconn *conn,
struct ip_addr *addr,
u16_t port);
err_t netconn_disconnect (struct netconn *conn);
err_t netconn_listen (struct netconn *conn);
struct netconn * netconn_accept (struct netconn *conn);
struct netbuf * netconn_recv (struct netconn *conn);
err_t netconn_send (struct netconn *conn,
struct netbuf *buf);
err_t netconn_write (struct netconn *conn,
void *dataptr, u16_t size,
u8_t copy);
err_t netconn_close (struct netconn *conn);
err_t netconn_err (struct netconn *conn);
#endif /* __LWIP_API_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_API_MSG_H__
#define __LWIP_API_MSG_H__
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include "lwip/ip.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/api.h"
enum api_msg_type {
API_MSG_NEWCONN,
API_MSG_DELCONN,
API_MSG_BIND,
API_MSG_CONNECT,
API_MSG_DISCONNECT,
API_MSG_LISTEN,
API_MSG_ACCEPT,
API_MSG_SEND,
API_MSG_RECV,
API_MSG_WRITE,
API_MSG_CLOSE,
API_MSG_MAX
};
struct api_msg_msg {
struct netconn *conn;
enum netconn_type conntype;
union {
struct pbuf *p;
struct {
struct ip_addr *ipaddr;
u16_t port;
} bc;
struct {
void *dataptr;
u16_t len;
u8_t copy;
} w;
sys_mbox_t mbox;
u16_t len;
} msg;
};
struct api_msg {
enum api_msg_type type;
struct api_msg_msg msg;
};
void api_msg_input(struct api_msg *msg);
void api_msg_post(struct api_msg *msg);
#endif /* __LWIP_API_MSG_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_ARCH_H__
#define __LWIP_ARCH_H__
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#endif
#ifndef BIG_ENDIAN
#define BIG_ENDIAN 4321
#endif
#include "arch/cc.h"
#ifndef PACK_STRUCT_BEGIN
#define PACK_STRUCT_BEGIN
#endif /* PACK_STRUCT_BEGIN */
#ifndef PACK_STRUCT_END
#define PACK_STRUCT_END
#endif /* PACK_STRUCT_END */
#ifndef PACK_STRUCT_FIELD
#define PACK_STRUCT_FIELD(x) x
#endif /* PACK_STRUCT_FIELD */
#ifndef PACK_STRUCT_STRUCT
#define PACK_STRUCT_STRUCT
#endif /* PACK_STRUCT_STRUCT */
#ifdef LWIP_PROVIDE_ERRNO
#define EPERM 1 /* Operation not permitted */
#define ENOENT 2 /* No such file or directory */
#define ESRCH 3 /* No such process */
#define EINTR 4 /* Interrupted system call */
#define EIO 5 /* I/O error */
#define ENXIO 6 /* No such device or address */
#define E2BIG 7 /* Arg list too long */
#define ENOEXEC 8 /* Exec format error */
#define EBADF 9 /* Bad file number */
#define ECHILD 10 /* No child processes */
#define EAGAIN 11 /* Try again */
#define ENOMEM 12 /* Out of memory */
#define EACCES 13 /* Permission denied */
#define EFAULT 14 /* Bad address */
#define ENOTBLK 15 /* Block device required */
#define EBUSY 16 /* Device or resource busy */
#define EEXIST 17 /* File exists */
#define EXDEV 18 /* Cross-device link */
#define ENODEV 19 /* No such device */
#define ENOTDIR 20 /* Not a directory */
#define EISDIR 21 /* Is a directory */
#define EINVAL 22 /* Invalid argument */
#define ENFILE 23 /* File table overflow */
#define EMFILE 24 /* Too many open files */
#define ENOTTY 25 /* Not a typewriter */
#define ETXTBSY 26 /* Text file busy */
#define EFBIG 27 /* File too large */
#define ENOSPC 28 /* No space left on device */
#define ESPIPE 29 /* Illegal seek */
#define EROFS 30 /* Read-only file system */
#define EMLINK 31 /* Too many links */
#define EPIPE 32 /* Broken pipe */
#define EDOM 33 /* Math argument out of domain of func */
#define ERANGE 34 /* Math result not representable */
#define EDEADLK 35 /* Resource deadlock would occur */
#define ENAMETOOLONG 36 /* File name too long */
#define ENOLCK 37 /* No record locks available */
#define ENOSYS 38 /* Function not implemented */
#define ENOTEMPTY 39 /* Directory not empty */
#define ELOOP 40 /* Too many symbolic links encountered */
#define EWOULDBLOCK EAGAIN /* Operation would block */
#define ENOMSG 42 /* No message of desired type */
#define EIDRM 43 /* Identifier removed */
#define ECHRNG 44 /* Channel number out of range */
#define EL2NSYNC 45 /* Level 2 not synchronized */
#define EL3HLT 46 /* Level 3 halted */
#define EL3RST 47 /* Level 3 reset */
#define ELNRNG 48 /* Link number out of range */
#define EUNATCH 49 /* Protocol driver not attached */
#define ENOCSI 50 /* No CSI structure available */
#define EL2HLT 51 /* Level 2 halted */
#define EBADE 52 /* Invalid exchange */
#define EBADR 53 /* Invalid request descriptor */
#define EXFULL 54 /* Exchange full */
#define ENOANO 55 /* No anode */
#define EBADRQC 56 /* Invalid request code */
#define EBADSLT 57 /* Invalid slot */
#define EDEADLOCK EDEADLK
#define EBFONT 59 /* Bad font file format */
#define ENOSTR 60 /* Device not a stream */
#define ENODATA 61 /* No data available */
#define ETIME 62 /* Timer expired */
#define ENOSR 63 /* Out of streams resources */
#define ENONET 64 /* Machine is not on the network */
#define ENOPKG 65 /* Package not installed */
#define EREMOTE 66 /* Object is remote */
#define ENOLINK 67 /* Link has been severed */
#define EADV 68 /* Advertise error */
#define ESRMNT 69 /* Srmount error */
#define ECOMM 70 /* Communication error on send */
#define EPROTO 71 /* Protocol error */
#define EMULTIHOP 72 /* Multihop attempted */
#define EDOTDOT 73 /* RFS specific error */
#define EBADMSG 74 /* Not a data message */
#define EOVERFLOW 75 /* Value too large for defined data type */
#define ENOTUNIQ 76 /* Name not unique on network */
#define EBADFD 77 /* File descriptor in bad state */
#define EREMCHG 78 /* Remote address changed */
#define ELIBACC 79 /* Can not access a needed shared library */
#define ELIBBAD 80 /* Accessing a corrupted shared library */
#define ELIBSCN 81 /* .lib section in a.out corrupted */
#define ELIBMAX 82 /* Attempting to link in too many shared libraries */
#define ELIBEXEC 83 /* Cannot exec a shared library directly */
#define EILSEQ 84 /* Illegal byte sequence */
#define ERESTART 85 /* Interrupted system call should be restarted */
#define ESTRPIPE 86 /* Streams pipe error */
#define EUSERS 87 /* Too many users */
#define ENOTSOCK 88 /* Socket operation on non-socket */
#define EDESTADDRREQ 89 /* Destination address required */
#define EMSGSIZE 90 /* Message too long */
#define EPROTOTYPE 91 /* Protocol wrong type for socket */
#define ENOPROTOOPT 92 /* Protocol not available */
#define EPROTONOSUPPORT 93 /* Protocol not supported */
#define ESOCKTNOSUPPORT 94 /* Socket type not supported */
#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */
#define EPFNOSUPPORT 96 /* Protocol family not supported */
#define EAFNOSUPPORT 97 /* Address family not supported by protocol */
#define EADDRINUSE 98 /* Address already in use */
#define EADDRNOTAVAIL 99 /* Cannot assign requested address */
#define ENETDOWN 100 /* Network is down */
#define ENETUNREACH 101 /* Network is unreachable */
#define ENETRESET 102 /* Network dropped connection because of reset */
#define ECONNABORTED 103 /* Software caused connection abort */
#define ECONNRESET 104 /* Connection reset by peer */
#define ENOBUFS 105 /* No buffer space available */
#define EISCONN 106 /* Transport endpoint is already connected */
#define ENOTCONN 107 /* Transport endpoint is not connected */
#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */
#define ETOOMANYREFS 109 /* Too many references: cannot splice */
#define ETIMEDOUT 110 /* Connection timed out */
#define ECONNREFUSED 111 /* Connection refused */
#define EHOSTDOWN 112 /* Host is down */
#define EHOSTUNREACH 113 /* No route to host */
#define EALREADY 114 /* Operation already in progress */
#define EINPROGRESS 115 /* Operation now in progress */
#define ESTALE 116 /* Stale NFS file handle */
#define EUCLEAN 117 /* Structure needs cleaning */
#define ENOTNAM 118 /* Not a XENIX named type file */
#define ENAVAIL 119 /* No XENIX semaphores available */
#define EISNAM 120 /* Is a named type file */
#define EREMOTEIO 121 /* Remote I/O error */
#define EDQUOT 122 /* Quota exceeded */
#define ENOMEDIUM 123 /* No medium found */
#define EMEDIUMTYPE 124 /* Wrong medium type */
#define ENSROK 0 /* DNS server returned answer with no data */
#define ENSRNODATA 160 /* DNS server returned answer with no data */
#define ENSRFORMERR 161 /* DNS server claims query was misformatted */
#define ENSRSERVFAIL 162 /* DNS server returned general failure */
#define ENSRNOTFOUND 163 /* Domain name not found */
#define ENSRNOTIMP 164 /* DNS server does not implement requested operation */
#define ENSRREFUSED 165 /* DNS server refused query */
#define ENSRBADQUERY 166 /* Misformatted DNS query */
#define ENSRBADNAME 167 /* Misformatted domain name */
#define ENSRBADFAMILY 168 /* Unsupported address family */
#define ENSRBADRESP 169 /* Misformatted DNS reply */
#define ENSRCONNREFUSED 170 /* Could not contact DNS servers */
#define ENSRTIMEOUT 171 /* Timeout while contacting DNS servers */
#define ENSROF 172 /* End of file */
#define ENSRFILE 173 /* Error reading file */
#define ENSRNOMEM 174 /* Out of memory */
#define ENSRDESTRUCTION 175 /* Application terminated lookup */
#define ENSRQUERYDOMAINTOOLONG 176 /* Domain name is too long */
#define ENSRCNAMELOOP 177 /* Domain name is too long */
#ifndef errno
extern int errno;
#endif
#endif /* LWIP_PROVIDE_ERRNO */
#endif /* __LWIP_ARCH_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_DEBUG_H__
#define __LWIP_DEBUG_H__
#include "arch/cc.h"
/** lower two bits indicate debug level
* - 0 off
* - 1 warning
* - 2 serious
* - 3 severe
*/
#define DBG_LEVEL_OFF 0
#define DBG_LEVEL_WARNING 1 /* bad checksums, dropped packets, ... */
#define DBG_LEVEL_SERIOUS 2 /* memory allocation failures, ... */
#define DBG_LEVEL_SEVERE 3 /* */
#define DBG_MASK_LEVEL 3
/** flag for LWIP_DEBUGF to enable that debug message */
#define DBG_ON 0x80U
/** flag for LWIP_DEBUGF to disable that debug message */
#define DBG_OFF 0x00U
/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
#define DBG_TRACE 0x40U
/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
#define DBG_STATE 0x20U
/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
#define DBG_FRESH 0x10U
/** flag for LWIP_DEBUGF to halt after printing this debug message */
#define DBG_HALT 0x08U
#ifndef LWIP_NOASSERT
# define LWIP_ASSERT(x,y) do { if(!(y)) LWIP_PLATFORM_ASSERT(x); } while(0)
#else
# define LWIP_ASSERT(x,y)
#endif
#ifdef LWIP_DEBUG
/** print debug message only if debug message type is enabled...
* AND is of correct type AND is at least DBG_LEVEL
*/
# define LWIP_DEBUGF(debug,x) do { if (((debug) & DBG_ON) && ((debug) & DBG_TYPES_ON) && ((s16_t)((debug) & DBG_MASK_LEVEL) >= DBG_MIN_LEVEL)) { LWIP_PLATFORM_DIAG(x); if ((debug) & DBG_HALT) while(1); } } while(0)
# define LWIP_ERROR(x) do { LWIP_PLATFORM_DIAG(x); } while(0)
#else /* LWIP_DEBUG */
# define LWIP_DEBUGF(debug,x)
# define LWIP_ERROR(x)
#endif /* LWIP_DEBUG */
#endif /* __LWIP_DEBUG_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_DEF_H__
#define __LWIP_DEF_H__
/* this might define NULL already */
#include "arch/cc.h"
#define LWIP_MAX(x , y) (x) > (y) ? (x) : (y)
#define LWIP_MIN(x , y) (x) < (y) ? (x) : (y)
#ifndef NULL
#define NULL ((void *)0)
#endif
#endif /* __LWIP_DEF_H__ */

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/** @file
*/
#ifndef __LWIP_DHCP_H__
#define __LWIP_DHCP_H__
#include "lwip/opt.h"
#include "lwip/netif.h"
#include "lwip/udp.h"
/** period (in seconds) of the application calling dhcp_coarse_tmr() */
#define DHCP_COARSE_TIMER_SECS 60
/** period (in milliseconds) of the application calling dhcp_fine_tmr() */
#define DHCP_FINE_TIMER_MSECS 500
struct dhcp
{
/** current DHCP state machine state */
u8_t state;
/** retries of current request */
u8_t tries;
/** transaction identifier of last sent request */
u32_t xid;
/** our connection to the DHCP server */
struct udp_pcb *pcb;
/** (first) pbuf of incoming msg */
struct pbuf *p;
/** incoming msg */
struct dhcp_msg *msg_in;
/** incoming msg options */
struct dhcp_msg *options_in;
/** ingoing msg options length */
u16_t options_in_len;
struct pbuf *p_out; /* pbuf of outcoming msg */
struct dhcp_msg *msg_out; /* outgoing msg */
u16_t options_out_len; /* outgoing msg options length */
u16_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */
u16_t t1_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */
u16_t t2_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */
struct ip_addr server_ip_addr; /* dhcp server address that offered this lease */
struct ip_addr offered_ip_addr;
struct ip_addr offered_sn_mask;
struct ip_addr offered_gw_addr;
struct ip_addr offered_bc_addr;
#define DHCP_MAX_DNS 2
u32_t dns_count; /* actual number of DNS servers obtained */
struct ip_addr offered_dns_addr[DHCP_MAX_DNS]; /* DNS server addresses */
u32_t offered_t0_lease; /* lease period (in seconds) */
u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */
u32_t offered_t2_rebind; /* recommended rebind time (usually 66% of lease period) */
/** Patch #1308
* TODO: See dhcp.c "TODO"s
*/
#if 0
struct ip_addr offered_si_addr;
u8_t *boot_file_name;
#endif
};
/* MUST be compiled with "pack structs" or equivalent! */
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
/** minimum set of fields of any DHCP message */
struct dhcp_msg
{
PACK_STRUCT_FIELD(u8_t op);
PACK_STRUCT_FIELD(u8_t htype);
PACK_STRUCT_FIELD(u8_t hlen);
PACK_STRUCT_FIELD(u8_t hops);
PACK_STRUCT_FIELD(u32_t xid);
PACK_STRUCT_FIELD(u16_t secs);
PACK_STRUCT_FIELD(u16_t flags);
PACK_STRUCT_FIELD(struct ip_addr ciaddr);
PACK_STRUCT_FIELD(struct ip_addr yiaddr);
PACK_STRUCT_FIELD(struct ip_addr siaddr);
PACK_STRUCT_FIELD(struct ip_addr giaddr);
#define DHCP_CHADDR_LEN 16U
PACK_STRUCT_FIELD(u8_t chaddr[DHCP_CHADDR_LEN]);
#define DHCP_SNAME_LEN 64U
PACK_STRUCT_FIELD(u8_t sname[DHCP_SNAME_LEN]);
#define DHCP_FILE_LEN 128U
PACK_STRUCT_FIELD(u8_t file[DHCP_FILE_LEN]);
PACK_STRUCT_FIELD(u32_t cookie);
#define DHCP_MIN_OPTIONS_LEN 68U
/** make sure user does not configure this too small */
#if ((defined(DHCP_OPTIONS_LEN)) && (DHCP_OPTIONS_LEN < DHCP_MIN_OPTIONS_LEN))
# undef DHCP_OPTIONS_LEN
#endif
/** allow this to be configured in lwipopts.h, but not too small */
#if (!defined(DHCP_OPTIONS_LEN))
/** set this to be sufficient for your options in outgoing DHCP msgs */
# define DHCP_OPTIONS_LEN DHCP_MIN_OPTIONS_LEN
#endif
PACK_STRUCT_FIELD(u8_t options[DHCP_OPTIONS_LEN]);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
/** start DHCP configuration */
err_t dhcp_start(struct netif *netif);
/** enforce early lease renewal (not needed normally)*/
err_t dhcp_renew(struct netif *netif);
/** release the DHCP lease, usually called before dhcp_stop()*/
err_t dhcp_release(struct netif *netif);
/** stop DHCP configuration */
void dhcp_stop(struct netif *netif);
/** inform server of our manual IP address */
void dhcp_inform(struct netif *netif);
/** if enabled, check whether the offered IP address is not in use, using ARP */
#if DHCP_DOES_ARP_CHECK
void dhcp_arp_reply(struct netif *netif, struct ip_addr *addr);
#endif
/** to be called every minute */
void dhcp_coarse_tmr(void);
/** to be called every half second */
void dhcp_fine_tmr(void);
/** DHCP message item offsets and length */
#define DHCP_MSG_OFS (UDP_DATA_OFS)
#define DHCP_OP_OFS (DHCP_MSG_OFS + 0)
#define DHCP_HTYPE_OFS (DHCP_MSG_OFS + 1)
#define DHCP_HLEN_OFS (DHCP_MSG_OFS + 2)
#define DHCP_HOPS_OFS (DHCP_MSG_OFS + 3)
#define DHCP_XID_OFS (DHCP_MSG_OFS + 4)
#define DHCP_SECS_OFS (DHCP_MSG_OFS + 8)
#define DHCP_FLAGS_OFS (DHCP_MSG_OFS + 10)
#define DHCP_CIADDR_OFS (DHCP_MSG_OFS + 12)
#define DHCP_YIADDR_OFS (DHCP_MSG_OFS + 16)
#define DHCP_SIADDR_OFS (DHCP_MSG_OFS + 20)
#define DHCP_GIADDR_OFS (DHCP_MSG_OFS + 24)
#define DHCP_CHADDR_OFS (DHCP_MSG_OFS + 28)
#define DHCP_SNAME_OFS (DHCP_MSG_OFS + 44)
#define DHCP_FILE_OFS (DHCP_MSG_OFS + 108)
#define DHCP_MSG_LEN 236
#define DHCP_COOKIE_OFS (DHCP_MSG_OFS + DHCP_MSG_LEN)
#define DHCP_OPTIONS_OFS (DHCP_MSG_OFS + DHCP_MSG_LEN + 4)
#define DHCP_CLIENT_PORT 68
#define DHCP_SERVER_PORT 67
/** DHCP client states */
#define DHCP_REQUESTING 1
#define DHCP_INIT 2
#define DHCP_REBOOTING 3
#define DHCP_REBINDING 4
#define DHCP_RENEWING 5
#define DHCP_SELECTING 6
#define DHCP_INFORMING 7
#define DHCP_CHECKING 8
#define DHCP_PERMANENT 9
#define DHCP_BOUND 10
/** not yet implemented #define DHCP_RELEASING 11 */
#define DHCP_BACKING_OFF 12
#define DHCP_OFF 13
#define DHCP_BOOTREQUEST 1
#define DHCP_BOOTREPLY 2
#define DHCP_DISCOVER 1
#define DHCP_OFFER 2
#define DHCP_REQUEST 3
#define DHCP_DECLINE 4
#define DHCP_ACK 5
#define DHCP_NAK 6
#define DHCP_RELEASE 7
#define DHCP_INFORM 8
#define DHCP_HTYPE_ETH 1
#define DHCP_HLEN_ETH 6
#define DHCP_BROADCAST_FLAG 15
#define DHCP_BROADCAST_MASK (1 << DHCP_FLAG_BROADCAST)
/** BootP options */
#define DHCP_OPTION_PAD 0
#define DHCP_OPTION_SUBNET_MASK 1 /* RFC 2132 3.3 */
#define DHCP_OPTION_ROUTER 3
#define DHCP_OPTION_DNS_SERVER 6
#define DHCP_OPTION_HOSTNAME 12
#define DHCP_OPTION_IP_TTL 23
#define DHCP_OPTION_MTU 26
#define DHCP_OPTION_BROADCAST 28
#define DHCP_OPTION_TCP_TTL 37
#define DHCP_OPTION_END 255
/** DHCP options */
#define DHCP_OPTION_REQUESTED_IP 50 /* RFC 2132 9.1, requested IP address */
#define DHCP_OPTION_LEASE_TIME 51 /* RFC 2132 9.2, time in seconds, in 4 bytes */
#define DHCP_OPTION_OVERLOAD 52 /* RFC2132 9.3, use file and/or sname field for options */
#define DHCP_OPTION_MESSAGE_TYPE 53 /* RFC 2132 9.6, important for DHCP */
#define DHCP_OPTION_MESSAGE_TYPE_LEN 1
#define DHCP_OPTION_SERVER_ID 54 /* RFC 2132 9.7, server IP address */
#define DHCP_OPTION_PARAMETER_REQUEST_LIST 55 /* RFC 2132 9.8, requested option types */
#define DHCP_OPTION_MAX_MSG_SIZE 57 /* RFC 2132 9.10, message size accepted >= 576 */
#define DHCP_OPTION_MAX_MSG_SIZE_LEN 2
#define DHCP_OPTION_T1 58 /* T1 renewal time */
#define DHCP_OPTION_T2 59 /* T2 rebinding time */
#define DHCP_OPTION_CLIENT_ID 61
#define DHCP_OPTION_TFTP_SERVERNAME 66
#define DHCP_OPTION_BOOTFILE 67
/** possible combinations of overloading the file and sname fields with options */
#define DHCP_OVERLOAD_NONE 0
#define DHCP_OVERLOAD_FILE 1
#define DHCP_OVERLOAD_SNAME 2
#define DHCP_OVERLOAD_SNAME_FILE 3
#endif /*__LWIP_DHCP_H__*/

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_ERR_H__
#define __LWIP_ERR_H__
#include "lwip/opt.h"
#include "arch/cc.h"
typedef s8_t err_t;
/* Definitions for error constants. */
#define ERR_OK 0 /* No error, everything OK. */
#define ERR_MEM -1 /* Out of memory error. */
#define ERR_BUF -2 /* Buffer error. */
#define ERR_ABRT -3 /* Connection aborted. */
#define ERR_RST -4 /* Connection reset. */
#define ERR_CLSD -5 /* Connection closed. */
#define ERR_CONN -6 /* Not connected. */
#define ERR_VAL -7 /* Illegal value. */
#define ERR_ARG -8 /* Illegal argument. */
#define ERR_RTE -9 /* Routing problem. */
#define ERR_USE -10 /* Address in use. */
#define ERR_IF -11 /* Low-level netif error */
#define ERR_ISCONN -12 /* Already connected. */
#ifdef LWIP_DEBUG
extern char *lwip_strerr(err_t err);
#else
#define lwip_strerr(x) ""
#endif /* LWIP_DEBUG */
#endif /* __LWIP_ERR_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_MEM_H__
#define __LWIP_MEM_H__
#include "lwip/opt.h"
#include "lwip/arch.h"
#if MEM_SIZE > 64000l
typedef u32_t mem_size_t;
#define MEM_SIZE_F U32_F
#else
typedef u16_t mem_size_t;
#define MEM_SIZE_F U16_F
#endif /* MEM_SIZE > 64000 */
#if MEM_LIBC_MALLOC
/* aliases for C library malloc() */
#define mem_init()
#define mem_free(x) free(x)
#define mem_malloc(x) malloc(x)
#define mem_realloc(x, size) realloc(x,size)
#else
/* lwIP alternative malloc */
void mem_init(void);
void *mem_malloc(mem_size_t size);
void mem_free(void *mem);
void *mem_realloc(void *mem, mem_size_t size);
#endif
#ifndef MEM_ALIGN_SIZE
#define MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
#endif
#ifndef MEM_ALIGN
#define MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
#endif
#endif /* __LWIP_MEM_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_MEMP_H__
#define __LWIP_MEMP_H__
#include "lwip/opt.h"
typedef enum {
MEMP_PBUF,
MEMP_RAW_PCB,
MEMP_UDP_PCB,
MEMP_TCP_PCB,
MEMP_TCP_PCB_LISTEN,
MEMP_TCP_SEG,
MEMP_NETBUF,
MEMP_NETCONN,
MEMP_API_MSG,
MEMP_TCPIP_MSG,
MEMP_SYS_TIMEOUT,
MEMP_MAX
} memp_t;
void memp_init(void);
void *memp_malloc(memp_t type);
void *memp_realloc(memp_t fromtype, memp_t totype, void *mem);
void memp_free(memp_t type, void *mem);
#endif /* __LWIP_MEMP_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_NETIF_H__
#define __LWIP_NETIF_H__
#include "lwip/opt.h"
#include "lwip/err.h"
#include "lwip/ip_addr.h"
#include "lwip/inet.h"
#include "lwip/pbuf.h"
#if LWIP_DHCP
# include "lwip/dhcp.h"
#endif
/** must be the maximum of all used hardware address lengths
across all types of interfaces in use */
#define NETIF_MAX_HWADDR_LEN 6U
/** TODO: define the use (where, when, whom) of netif flags */
/** whether the network interface is 'up'. this is
* a software flag used to control whether this network
* interface is enabled and processes traffic.
*/
#define NETIF_FLAG_UP 0x1U
/** if set, the netif has broadcast capability */
#define NETIF_FLAG_BROADCAST 0x2U
/** if set, the netif is one end of a point-to-point connection */
#define NETIF_FLAG_POINTTOPOINT 0x4U
/** if set, the interface is configured using DHCP */
#define NETIF_FLAG_DHCP 0x08U
/** if set, the interface has an active link
* (set by the network interface driver) */
#define NETIF_FLAG_LINK_UP 0x10U
/** Generic data structure used for all lwIP network interfaces.
* The following fields should be filled in by the initialization
* function for the device driver: hwaddr_len, hwaddr[], mtu, flags */
struct netif {
/** pointer to next in linked list */
struct netif *next;
/** IP address configuration in network byte order */
struct ip_addr ip_addr;
struct ip_addr netmask;
struct ip_addr gw;
/** This function is called by the network device driver
* to pass a packet up the TCP/IP stack. */
err_t (* input)(struct pbuf *p, struct netif *inp);
/** This function is called by the IP module when it wants
* to send a packet on the interface. This function typically
* first resolves the hardware address, then sends the packet. */
err_t (* output)(struct netif *netif, struct pbuf *p,
struct ip_addr *ipaddr);
/** This function is called by the ARP module when it wants
* to send a packet on the interface. This function outputs
* the pbuf as-is on the link medium. */
err_t (* linkoutput)(struct netif *netif, struct pbuf *p);
/** This field can be set by the device driver and could point
* to state information for the device. */
void *state;
#if LWIP_DHCP
/** the DHCP client state information for this netif */
struct dhcp *dhcp;
#endif
/** number of bytes used in hwaddr */
u8_t hwaddr_len;
/** link level hardware address of this interface */
u8_t hwaddr[NETIF_MAX_HWADDR_LEN];
/** maximum transfer unit (in bytes) */
u16_t mtu;
/** flags (see NETIF_FLAG_ above) */
u8_t flags;
/** descriptive abbreviation */
char name[2];
/** number of this interface */
u8_t num;
#if LWIP_SNMP
/** link type (ifType values per RFC1213) */
u8_t link_type;
/** (estimate) link speed */
u32_t link_speed;
/** timestamp at last change made (up/down) */
u32_t ts;
/** counters */
u32_t ifinoctets;
u32_t ifinucastpkts;
u32_t ifinnucastpkts;
u32_t ifindiscards;
u32_t ifoutoctets;
u32_t ifoutucastpkts;
u32_t ifoutnucastpkts;
u32_t ifoutdiscards;
#endif
};
/** The list of network interfaces. */
extern struct netif *netif_list;
/** The default network interface. */
extern struct netif *netif_default;
/* netif_init() must be called first. */
void netif_init(void);
struct netif *netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
struct ip_addr *gw,
void *state,
err_t (* init)(struct netif *netif),
err_t (* input)(struct pbuf *p, struct netif *netif));
void
netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask,
struct ip_addr *gw);
void netif_remove(struct netif * netif);
/* Returns a network interface given its name. The name is of the form
"et0", where the first two letters are the "name" field in the
netif structure, and the digit is in the num field in the same
structure. */
struct netif *netif_find(char *name);
void netif_set_default(struct netif *netif);
void netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr);
void netif_set_netmask(struct netif *netif, struct ip_addr *netmast);
void netif_set_gw(struct netif *netif, struct ip_addr *gw);
void netif_set_up(struct netif *netif);
void netif_set_down(struct netif *netif);
u8_t netif_is_up(struct netif *netif);
#endif /* __LWIP_NETIF_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_PBUF_H__
#define __LWIP_PBUF_H__
#include "arch/cc.h"
#define PBUF_TRANSPORT_HLEN 20
#define PBUF_IP_HLEN 20
typedef enum {
PBUF_TRANSPORT,
PBUF_IP,
PBUF_LINK,
PBUF_RAW
} pbuf_layer;
typedef enum {
PBUF_RAM,
PBUF_ROM,
PBUF_REF,
PBUF_POOL
} pbuf_flag;
/* Definitions for the pbuf flag field. These are NOT the flags that
* are passed to pbuf_alloc(). */
#define PBUF_FLAG_RAM 0x00U /* Flags that pbuf data is stored in RAM */
#define PBUF_FLAG_ROM 0x01U /* Flags that pbuf data is stored in ROM */
#define PBUF_FLAG_POOL 0x02U /* Flags that the pbuf comes from the pbuf pool */
#define PBUF_FLAG_REF 0x04U /* Flags thet the pbuf payload refers to RAM */
/** indicates this packet was broadcast on the link */
#define PBUF_FLAG_LINK_BROADCAST 0x80U
struct pbuf {
/** next pbuf in singly linked pbuf chain */
struct pbuf *next;
/** pointer to the actual data in the buffer */
void *payload;
/**
* total length of this buffer and all next buffers in chain
* belonging to the same packet.
*
* For non-queue packet chains this is the invariant:
* p->tot_len == p->len + (p->next? p->next->tot_len: 0)
*/
u16_t tot_len;
/** length of this buffer */
u16_t len;
/** flags telling the type of pbuf, see PBUF_FLAG_ */
u16_t flags;
/**
* the reference count always equals the number of pointers
* that refer to this pbuf. This can be pointers from an application,
* the stack itself, or pbuf->next pointers from a chain.
*/
u16_t ref;
};
void pbuf_init(void);
struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag);
void pbuf_realloc(struct pbuf *p, u16_t size);
u8_t pbuf_header(struct pbuf *p, s16_t header_size);
void pbuf_ref(struct pbuf *p);
void pbuf_ref_chain(struct pbuf *p);
u8_t pbuf_free(struct pbuf *p);
u8_t pbuf_clen(struct pbuf *p);
void pbuf_cat(struct pbuf *h, struct pbuf *t);
void pbuf_chain(struct pbuf *h, struct pbuf *t);
struct pbuf *pbuf_take(struct pbuf *f);
struct pbuf *pbuf_dechain(struct pbuf *p);
void pbuf_queue(struct pbuf *p, struct pbuf *n);
struct pbuf * pbuf_dequeue(struct pbuf *p);
#endif /* __LWIP_PBUF_H__ */

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/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __LWIP_RAW_H__
#define __LWIP_RAW_H__
#include "lwip/arch.h"
#include "lwip/pbuf.h"
#include "lwip/inet.h"
#include "lwip/ip.h"
struct raw_pcb {
/* Common members of all PCB types */
IP_PCB;
struct raw_pcb *next;
u16_t protocol;
u8_t (* recv)(void *arg, struct raw_pcb *pcb, struct pbuf *p,
struct ip_addr *addr);
void *recv_arg;
};
/* The following functions is the application layer interface to the
RAW code. */
struct raw_pcb * raw_new (u16_t proto);
void raw_remove (struct raw_pcb *pcb);
err_t raw_bind (struct raw_pcb *pcb, struct ip_addr *ipaddr);
err_t raw_connect (struct raw_pcb *pcb, struct ip_addr *ipaddr);
void raw_recv (struct raw_pcb *pcb,
u8_t (* recv)(void *arg, struct raw_pcb *pcb,
struct pbuf *p,
struct ip_addr *addr),
void *recv_arg);
err_t raw_sendto (struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr);
err_t raw_send (struct raw_pcb *pcb, struct pbuf *p);
/* The following functions are the lower layer interface to RAW. */
u8_t raw_input (struct pbuf *p, struct netif *inp);
void raw_init (void);
#endif /* __LWIP_RAW_H__ */

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