Add third_party libs

1 files changed, 374 insertions, 0 deletions

diff --git a/third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/psock.c b/third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/psock.c
new file mode 100644
index 0000000..d29ef01
--- /dev/null
+++ b/third_party/FreeRTOS/Demo/Common/ethernet/FreeRTOS-uIP/psock.c
@@ -0,0 +1,374 @@
+/*

+ * 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 );

+}

+

+/*---------------------------------------------------------------------------*/