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-rw-r--r--Projects/Webserver/Lib/uip/clock.c76
-rw-r--r--Projects/Webserver/Lib/uip/clock.h24
-rw-r--r--Projects/Webserver/Lib/uip/timer.c254
-rw-r--r--Projects/Webserver/Lib/uip/timer.h172
-rw-r--r--Projects/Webserver/Lib/uip/uip-split.c282
-rw-r--r--Projects/Webserver/Lib/uip/uip-split.h206
-rw-r--r--Projects/Webserver/Lib/uip/uip.c3876
-rw-r--r--Projects/Webserver/Lib/uip/uip.h4258
-rw-r--r--Projects/Webserver/Lib/uip/uip_arp.c862
-rw-r--r--Projects/Webserver/Lib/uip/uip_arp.h290
-rw-r--r--Projects/Webserver/Lib/uip/uipopt.h1474
11 files changed, 5887 insertions, 5887 deletions
diff --git a/Projects/Webserver/Lib/uip/clock.c b/Projects/Webserver/Lib/uip/clock.c
index 450714888..046b6e344 100644
--- a/Projects/Webserver/Lib/uip/clock.c
+++ b/Projects/Webserver/Lib/uip/clock.c
@@ -1,38 +1,38 @@
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <avr/interrupt.h>
-#include <avr/io.h>
-#include <avr/sfr_defs.h>
-
-#include "clock.h"
-
-//Counted time
-volatile clock_time_t clock_datetime = 0;
-
-//Overflow interrupt
-ISR(TIMER1_COMPA_vect)
-{
- clock_datetime += 1;
-}
-
-//Initialise the clock
-void clock_init()
-{
- OCR1A = ((F_CPU / 1024) / 100);
- TCCR1B = ((1 << WGM12) | (1 << CS12) | (1 << CS10));
- TIMSK1 = (1 << OCIE1A);
-}
-
-//Return time
-clock_time_t clock_time()
-{
- clock_time_t time;
-
- ATOMIC_BLOCK(ATOMIC_FORCEON)
- {
- time = clock_datetime;
- }
-
- return time;
-}
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <avr/sfr_defs.h>
+
+#include "clock.h"
+
+//Counted time
+volatile clock_time_t clock_datetime = 0;
+
+//Overflow interrupt
+ISR(TIMER1_COMPA_vect)
+{
+ clock_datetime += 1;
+}
+
+//Initialise the clock
+void clock_init()
+{
+ OCR1A = ((F_CPU / 1024) / 100);
+ TCCR1B = ((1 << WGM12) | (1 << CS12) | (1 << CS10));
+ TIMSK1 = (1 << OCIE1A);
+}
+
+//Return time
+clock_time_t clock_time()
+{
+ clock_time_t time;
+
+ ATOMIC_BLOCK(ATOMIC_FORCEON)
+ {
+ time = clock_datetime;
+ }
+
+ return time;
+}
diff --git a/Projects/Webserver/Lib/uip/clock.h b/Projects/Webserver/Lib/uip/clock.h
index b585f47aa..05d30386b 100644
--- a/Projects/Webserver/Lib/uip/clock.h
+++ b/Projects/Webserver/Lib/uip/clock.h
@@ -1,12 +1,12 @@
-#ifndef __CLOCK_ARCH_H__
-#define __CLOCK_ARCH_H__
-
-#include <stdint.h>
-#include <util/atomic.h>
-
-typedef uint16_t clock_time_t;
-#define CLOCK_SECOND 100
-void clock_init(void);
-clock_time_t clock_time(void);
-
-#endif /* __CLOCK_ARCH_H__ */
+#ifndef __CLOCK_ARCH_H__
+#define __CLOCK_ARCH_H__
+
+#include <stdint.h>
+#include <util/atomic.h>
+
+typedef uint16_t clock_time_t;
+#define CLOCK_SECOND 100
+void clock_init(void);
+clock_time_t clock_time(void);
+
+#endif /* __CLOCK_ARCH_H__ */
diff --git a/Projects/Webserver/Lib/uip/timer.c b/Projects/Webserver/Lib/uip/timer.c
index 8c270b233..74eedf611 100644
--- a/Projects/Webserver/Lib/uip/timer.c
+++ b/Projects/Webserver/Lib/uip/timer.c
@@ -1,127 +1,127 @@
-/**
- * \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 "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;
-}
-/*---------------------------------------------------------------------------*/
-
-/** @} */
+/**
+ * \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 "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;
+}
+/*---------------------------------------------------------------------------*/
+
+/** @} */
diff --git a/Projects/Webserver/Lib/uip/timer.h b/Projects/Webserver/Lib/uip/timer.h
index e28e3ca5f..057bea49c 100644
--- a/Projects/Webserver/Lib/uip/timer.h
+++ b/Projects/Webserver/Lib/uip/timer.h
@@ -1,86 +1,86 @@
-/**
- * \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__ */
-
-/** @} */
+/**
+ * \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__ */
+
+/** @} */
diff --git a/Projects/Webserver/Lib/uip/uip-split.c b/Projects/Webserver/Lib/uip/uip-split.c
index 9b1d1ce88..5924fabe5 100644
--- a/Projects/Webserver/Lib/uip/uip-split.c
+++ b/Projects/Webserver/Lib/uip/uip-split.c
@@ -1,141 +1,141 @@
-/*
- * 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: uip-split.c,v 1.2 2008/10/14 13:39:12 julienabeille Exp $
- */
-
-#include "uip-split.h"
-
-
-#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
-
-/*-----------------------------------------------------------------------------*/
-void
-uip_split_output(void)
-{
-#if UIP_TCP
- u16_t tcplen, len1, len2;
-
- /* We only try to split maximum sized TCP segments. */
- if(BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE) {
-
- tcplen = uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN;
- /* 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 + UIP_LLH_LEN;
-#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 - UIP_LLH_LEN) >> 8;
- BUF->len[1] = (uip_len - UIP_LLH_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. */
-#if UIP_CONF_IPV6
- tcpip_ipv6_output();
-#else
- RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
-#endif /* UIP_CONF_IPV6 */
-
- /* 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 + UIP_LLH_LEN;
-#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 - UIP_LLH_LEN) >> 8;
- BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff;
-#endif /* UIP_CONF_IPV6 */
-
- 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. */
-#if UIP_CONF_IPV6
- tcpip_ipv6_output();
-#else
- RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
-#endif /* UIP_CONF_IPV6 */
- return;
- }
-#endif /* UIP_TCP */
-
- /* uip_fw_output();*/
-#if UIP_CONF_IPV6
- tcpip_ipv6_output();
-#else
- RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
-#endif /* UIP_CONF_IPV6 */
-}
-
-/*-----------------------------------------------------------------------------*/
+/*
+ * 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: uip-split.c,v 1.2 2008/10/14 13:39:12 julienabeille Exp $
+ */
+
+#include "uip-split.h"
+
+
+#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
+
+/*-----------------------------------------------------------------------------*/
+void
+uip_split_output(void)
+{
+#if UIP_TCP
+ u16_t tcplen, len1, len2;
+
+ /* We only try to split maximum sized TCP segments. */
+ if(BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE) {
+
+ tcplen = uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN;
+ /* 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 + UIP_LLH_LEN;
+#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 - UIP_LLH_LEN) >> 8;
+ BUF->len[1] = (uip_len - UIP_LLH_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. */
+#if UIP_CONF_IPV6
+ tcpip_ipv6_output();
+#else
+ RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
+#endif /* UIP_CONF_IPV6 */
+
+ /* 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 + UIP_LLH_LEN;
+#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 - UIP_LLH_LEN) >> 8;
+ BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff;
+#endif /* UIP_CONF_IPV6 */
+
+ 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. */
+#if UIP_CONF_IPV6
+ tcpip_ipv6_output();
+#else
+ RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
+#endif /* UIP_CONF_IPV6 */
+ return;
+ }
+#endif /* UIP_TCP */
+
+ /* uip_fw_output();*/
+#if UIP_CONF_IPV6
+ tcpip_ipv6_output();
+#else
+ RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
+#endif /* UIP_CONF_IPV6 */
+}
+
+/*-----------------------------------------------------------------------------*/
diff --git a/Projects/Webserver/Lib/uip/uip-split.h b/Projects/Webserver/Lib/uip/uip-split.h
index 1df837ef3..c7274c36a 100644
--- a/Projects/Webserver/Lib/uip/uip-split.h
+++ b/Projects/Webserver/Lib/uip/uip-split.h
@@ -1,103 +1,103 @@
-/*
- * 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: uip-split.h,v 1.1 2006/06/17 22:41:19 adamdunkels 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__
-
-#include <string.h>
-#include <uip.h>
-
-#include "../../USBHostMode.h"
-
-#include <LUFA/Drivers/USB/Class/RNDIS.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);
-void uip_add32(u8_t *op32, u16_t op16);
-#endif /* __UIP_SPLIT_H__ */
-
-/** @} */
-/** @} */
+/*
+ * 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: uip-split.h,v 1.1 2006/06/17 22:41:19 adamdunkels 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__
+
+#include <string.h>
+#include <uip.h>
+
+#include "../../USBHostMode.h"
+
+#include <LUFA/Drivers/USB/Class/RNDIS.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);
+void uip_add32(u8_t *op32, u16_t op16);
+#endif /* __UIP_SPLIT_H__ */
+
+/** @} */
+/** @} */
diff --git a/Projects/Webserver/Lib/uip/uip.c b/Projects/Webserver/Lib/uip/uip.c
index b2c422825..22a72043f 100644
--- a/Projects/Webserver/Lib/uip/uip.c
+++ b/Projects/Webserver/Lib/uip/uip.c
@@ -1,1938 +1,1938 @@
-#define DEBUG_PRINTF(...) /*printf(__VA_ARGS__)*/
-
-/**
- * \addtogroup uip
- * @{
- */
-
-/**
- * \file
- * The uIP TCP/IP stack code.
- * \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.c,v 1.15 2008/10/15 08:08:32 adamdunkels Exp $
- *
- */
-
-/*
- * uIP is a small implementation of the IP, UDP and TCP protocols (as
- * well as some basic ICMP stuff). The implementation couples the IP,
- * UDP, TCP and the application layers very tightly. To keep the size
- * of the compiled code down, this code frequently uses the goto
- * statement. While it would be possible to break the uip_process()
- * function into many smaller functions, this would increase the code
- * size because of the overhead of parameter passing and the fact that
- * the optimier would not be as efficient.
- *
- * The principle is that we have a small buffer, called the uip_buf,
- * in which the device driver puts an incoming packet. The TCP/IP
- * stack parses the headers in the packet, and calls the
- * application. If the remote host has sent data to the application,
- * this data is present in the uip_buf and the application read the
- * data from there. It is up to the application to put this data into
- * a byte stream if needed. The application will not be fed with data
- * that is out of sequence.
- *
- * If the application whishes to send data to the peer, it should put
- * its data into the uip_buf. The uip_appdata pointer points to the
- * first available byte. The TCP/IP stack will calculate the
- * checksums, and fill in the necessary header fields and finally send
- * the packet back to the peer.
-*/
-
-#include "uip.h"
-#include "uipopt.h"
-#include "uip_arp.h"
-
-#if !UIP_CONF_IPV6 /* If UIP_CONF_IPV6 is defined, we compile the
- uip6.c file instead of this one. Therefore
- this #ifndef removes the entire compilation
- output of the uip.c file */
-
-
-#if UIP_CONF_IPV6
-#include "net/uip-neighbor.h"
-#endif /* UIP_CONF_IPV6 */
-
-#include <string.h>
-
-/*---------------------------------------------------------------------------*/
-/* Variable definitions. */
-
-
-/* The IP address of this host. If it is defined to be fixed (by
- setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set
- here. Otherwise, the address */
-#if UIP_FIXEDADDR > 0
-const uip_ipaddr_t uip_hostaddr =
- { UIP_IPADDR0, UIP_IPADDR1, UIP_IPADDR2, UIP_IPADDR3 };
-const uip_ipaddr_t uip_draddr =
- { UIP_DRIPADDR0, UIP_DRIPADDR1, UIP_DRIPADDR2, UIP_DRIPADDR3 };
-const uip_ipaddr_t uip_netmask =
- { UIP_NETMASK0, UIP_NETMASK1, UIP_NETMASK2, UIP_NETMASK3 };
-#else
-uip_ipaddr_t uip_hostaddr, uip_draddr, uip_netmask;
-#endif /* UIP_FIXEDADDR */
-
-const uip_ipaddr_t uip_broadcast_addr =
-#if UIP_CONF_IPV6
- { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
-#else /* UIP_CONF_IPV6 */
- { { 0xff, 0xff, 0xff, 0xff } };
-#endif /* UIP_CONF_IPV6 */
-const uip_ipaddr_t uip_all_zeroes_addr = { { 0x0, /* rest is 0 */ } };
-
-#if UIP_FIXEDETHADDR
-const struct uip_eth_addr uip_ethaddr = {{UIP_ETHADDR0,
- UIP_ETHADDR1,
- UIP_ETHADDR2,
- UIP_ETHADDR3,
- UIP_ETHADDR4,
- UIP_ETHADDR5}};
-#else
-struct uip_eth_addr uip_ethaddr = {{0,0,0,0,0,0}};
-#endif
-
-#ifndef UIP_CONF_EXTERNAL_BUFFER
-u8_t uip_buf[UIP_BUFSIZE + 2]; /* The packet buffer that contains
- incoming packets. */
-#endif /* UIP_CONF_EXTERNAL_BUFFER */
-
-void *uip_appdata; /* The uip_appdata pointer points to
- application data. */
-void *uip_sappdata; /* The uip_appdata pointer points to
- the application data which is to
- be sent. */
-#if UIP_URGDATA > 0
-void *uip_urgdata; /* The uip_urgdata pointer points to
- urgent data (out-of-band data), if
- present. */
-u16_t uip_urglen, uip_surglen;
-#endif /* UIP_URGDATA > 0 */
-
-u16_t uip_len, uip_slen;
- /* The uip_len is either 8 or 16 bits,
- depending on the maximum packet
- size. */
-
-u8_t uip_flags; /* The uip_flags variable is used for
- communication between the TCP/IP stack
- and the application program. */
-struct uip_conn *uip_conn; /* uip_conn always points to the current
- connection. */
-
-struct uip_conn uip_conns[UIP_CONNS];
- /* The uip_conns array holds all TCP
- connections. */
-u16_t uip_listenports[UIP_LISTENPORTS];
- /* The uip_listenports list all currently
- listning ports. */
-#if UIP_UDP
-struct uip_udp_conn *uip_udp_conn;
-struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
-#endif /* UIP_UDP */
-
-static u16_t ipid; /* Ths ipid variable is an increasing
- number that is used for the IP ID
- field. */
-
-void uip_setipid(u16_t id) { ipid = id; }
-
-static u8_t iss[4]; /* The iss variable is used for the TCP
- initial sequence number. */
-
-#if UIP_ACTIVE_OPEN
-static u16_t lastport; /* Keeps track of the last port used for
- a new connection. */
-#endif /* UIP_ACTIVE_OPEN */
-
-/* Temporary variables. */
-u8_t uip_acc32[4];
-static u8_t c, opt;
-static u16_t tmp16;
-
-/* Structures and definitions. */
-#define TCP_FIN 0x01
-#define TCP_SYN 0x02
-#define TCP_RST 0x04
-#define TCP_PSH 0x08
-#define TCP_ACK 0x10
-#define TCP_URG 0x20
-#define TCP_CTL 0x3f
-
-#define TCP_OPT_END 0 /* End of TCP options list */
-#define TCP_OPT_NOOP 1 /* "No-operation" TCP option */
-#define TCP_OPT_MSS 2 /* Maximum segment size TCP option */
-
-#define TCP_OPT_MSS_LEN 4 /* Length of TCP MSS option. */
-
-#define ICMP_ECHO_REPLY 0
-#define ICMP_ECHO 8
-
-#define ICMP_DEST_UNREACHABLE 3
-#define ICMP_PORT_UNREACHABLE 3
-
-#define ICMP6_ECHO_REPLY 129
-#define ICMP6_ECHO 128
-#define ICMP6_NEIGHBOR_SOLICITATION 135
-#define ICMP6_NEIGHBOR_ADVERTISEMENT 136
-
-#define ICMP6_FLAG_S (1 << 6)
-
-#define ICMP6_OPTION_SOURCE_LINK_ADDRESS 1
-#define ICMP6_OPTION_TARGET_LINK_ADDRESS 2
-
-
-/* Macros. */
-#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
-#define FBUF ((struct uip_tcpip_hdr *)&uip_reassbuf[0])
-#define ICMPBUF ((struct uip_icmpip_hdr *)&uip_buf[UIP_LLH_LEN])
-#define UDPBUF ((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])
-
-
-#if UIP_STATISTICS == 1
-struct uip_stats uip_stat;
-#define UIP_STAT(s) s
-#else
-#define UIP_STAT(s)
-#endif /* UIP_STATISTICS == 1 */
-
-#if UIP_LOGGING == 1
-#include <stdio.h>
-void uip_log(char *msg);
-#define UIP_LOG(m) uip_log(m)
-#else
-#define UIP_LOG(m)
-#endif /* UIP_LOGGING == 1 */
-
-#if ! UIP_ARCH_ADD32
-void
-uip_add32(u8_t *op32, u16_t op16)
-{
- uip_acc32[3] = op32[3] + (op16 & 0xff);
- uip_acc32[2] = op32[2] + (op16 >> 8);
- uip_acc32[1] = op32[1];
- uip_acc32[0] = op32[0];
-
- if(uip_acc32[2] < (op16 >> 8)) {
- ++uip_acc32[1];
- if(uip_acc32[1] == 0) {
- ++uip_acc32[0];
- }
- }
-
-
- if(uip_acc32[3] < (op16 & 0xff)) {
- ++uip_acc32[2];
- if(uip_acc32[2] == 0) {
- ++uip_acc32[1];
- if(uip_acc32[1] == 0) {
- ++uip_acc32[0];
- }
- }
- }
-}
-
-#endif /* UIP_ARCH_ADD32 */
-
-#if ! UIP_ARCH_CHKSUM
-/*---------------------------------------------------------------------------*/
-static u16_t
-chksum(u16_t sum, const u8_t *data, u16_t len)
-{
- u16_t t;
- const u8_t *dataptr;
- const u8_t *last_byte;
-
- dataptr = data;
- last_byte = data + len - 1;
-
- while(dataptr < last_byte) { /* At least two more bytes */
- t = (dataptr[0] << 8) + dataptr[1];
- sum += t;
- if(sum < t) {
- sum++; /* carry */
- }
- dataptr += 2;
- }
-
- if(dataptr == last_byte) {
- t = (dataptr[0] << 8) + 0;
- sum += t;
- if(sum < t) {
- sum++; /* carry */
- }
- }
-
- /* Return sum in host byte order. */
- return sum;
-}
-/*---------------------------------------------------------------------------*/
-u16_t
-uip_chksum(u16_t *data, u16_t len)
-{
- return htons(chksum(0, (u8_t *)data, len));
-}
-/*---------------------------------------------------------------------------*/
-#ifndef UIP_ARCH_IPCHKSUM
-u16_t
-uip_ipchksum(void)
-{
- u16_t sum;
-
- sum = chksum(0, &uip_buf[UIP_LLH_LEN], UIP_IPH_LEN);
- DEBUG_PRINTF("uip_ipchksum: sum 0x%04x\n", sum);
- return (sum == 0) ? 0xffff : htons(sum);
-}
-#endif
-/*---------------------------------------------------------------------------*/
-static u16_t
-upper_layer_chksum(u8_t proto)
-{
- u16_t upper_layer_len;
- u16_t sum;
-
-#if UIP_CONF_IPV6
- upper_layer_len = (((u16_t)(BUF->len[0]) << 8) + BUF->len[1]);
-#else /* UIP_CONF_IPV6 */
- upper_layer_len = (((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - UIP_IPH_LEN;
-#endif /* UIP_CONF_IPV6 */
-
- /* First sum pseudoheader. */
-
- /* IP protocol and length fields. This addition cannot carry. */
- sum = upper_layer_len + proto;
- /* Sum IP source and destination addresses. */
- sum = chksum(sum, (u8_t *)&BUF->srcipaddr, 2 * sizeof(uip_ipaddr_t));
-
- /* Sum TCP header and data. */
- sum = chksum(sum, &uip_buf[UIP_IPH_LEN + UIP_LLH_LEN],
- upper_layer_len);
-
- return (sum == 0) ? 0xffff : htons(sum);
-}
-/*---------------------------------------------------------------------------*/
-#if UIP_CONF_IPV6
-u16_t
-uip_icmp6chksum(void)
-{
- return upper_layer_chksum(UIP_PROTO_ICMP6);
-
-}
-#endif /* UIP_CONF_IPV6 */
-/*---------------------------------------------------------------------------*/
-u16_t
-uip_tcpchksum(void)
-{
- return upper_layer_chksum(UIP_PROTO_TCP);
-}
-/*---------------------------------------------------------------------------*/
-#if UIP_UDP_CHECKSUMS
-u16_t
-uip_udpchksum(void)
-{
- return upper_layer_chksum(UIP_PROTO_UDP);
-}
-#endif /* UIP_UDP_CHECKSUMS */
-#endif /* UIP_ARCH_CHKSUM */
-/*---------------------------------------------------------------------------*/
-void
-uip_init(void)
-{
- for(c = 0; c < UIP_LISTENPORTS; ++c) {
- uip_listenports[c] = 0;
- }
- for(c = 0; c < UIP_CONNS; ++c) {
- uip_conns[c].tcpstateflags = UIP_CLOSED;
- }
-#if UIP_ACTIVE_OPEN
- lastport = 1024;
-#endif /* UIP_ACTIVE_OPEN */
-
-#if UIP_UDP
- for(c = 0; c < UIP_UDP_CONNS; ++c) {
- uip_udp_conns[c].lport = 0;
- }
-#endif /* UIP_UDP */
-
-
- /* IPv4 initialization. */
-#if UIP_FIXEDADDR == 0
- /* uip_hostaddr[0] = uip_hostaddr[1] = 0;*/
-#endif /* UIP_FIXEDADDR */
-
-}
-/*---------------------------------------------------------------------------*/
-#if UIP_ACTIVE_OPEN
-struct uip_conn *
-uip_connect(uip_ipaddr_t *ripaddr, u16_t rport)
-{
- register struct uip_conn *conn, *cconn;
-
- /* Find an unused local port. */
- again:
- ++lastport;
-
- if(lastport >= 32000) {
- lastport = 4096;
- }
-
- /* Check if this port is already in use, and if so try to find
- another one. */
- for(c = 0; c < UIP_CONNS; ++c) {
- conn = &uip_conns[c];
- if(conn->tcpstateflags != UIP_CLOSED &&
- conn->lport == htons(lastport)) {
- goto again;
- }
- }
-
- conn = 0;
- for(c = 0; c < UIP_CONNS; ++c) {
- cconn = &uip_conns[c];
- if(cconn->tcpstateflags == UIP_CLOSED) {
- conn = cconn;
- break;
- }
- if(cconn->tcpstateflags == UIP_TIME_WAIT) {
- if(conn == 0 ||
- cconn->timer > conn->timer) {
- conn = cconn;
- }
- }
- }
-
- if(conn == 0) {
- return 0;
- }
-
- conn->tcpstateflags = UIP_SYN_SENT;
-
- conn->snd_nxt[0] = iss[0];
- conn->snd_nxt[1] = iss[1];
- conn->snd_nxt[2] = iss[2];
- conn->snd_nxt[3] = iss[3];
-
- conn->initialmss = conn->mss = UIP_TCP_MSS;
-
- conn->len = 1; /* TCP length of the SYN is one. */
- conn->nrtx = 0;
- conn->timer = 1; /* Send the SYN next time around. */
- conn->rto = UIP_RTO;
- conn->sa = 0;
- conn->sv = 16; /* Initial value of the RTT variance. */
- conn->lport = htons(lastport);
- conn->rport = rport;
- uip_ipaddr_copy(&conn->ripaddr, ripaddr);
-
- return conn;
-}
-#endif /* UIP_ACTIVE_OPEN */
-/*---------------------------------------------------------------------------*/
-#if UIP_UDP
-struct uip_udp_conn *
-uip_udp_new(const uip_ipaddr_t *ripaddr, u16_t rport)
-{
- register struct uip_udp_conn *conn;
-
- /* Find an unused local port. */
- again:
- ++lastport;
-
- if(lastport >= 32000) {
- lastport = 4096;
- }
-
- for(c = 0; c < UIP_UDP_CONNS; ++c) {
- if(uip_udp_conns[c].lport == htons(lastport)) {
- goto again;
- }
- }
-
-
- conn = 0;
- for(c = 0; c < UIP_UDP_CONNS; ++c) {
- if(uip_udp_conns[c].lport == 0) {
- conn = &uip_udp_conns[c];
- break;
- }
- }
-
- if(conn == 0) {
- return 0;
- }
-
- conn->lport = HTONS(lastport);
- conn->rport = rport;
- if(ripaddr == NULL) {
- memset(&conn->ripaddr, 0, sizeof(uip_ipaddr_t));
- } else {
- uip_ipaddr_copy(&conn->ripaddr, ripaddr);
- }
- conn->ttl = UIP_TTL;
-
- return conn;
-}
-#endif /* UIP_UDP */
-/*---------------------------------------------------------------------------*/
-void
-uip_unlisten(u16_t port)
-{
- for(c = 0; c < UIP_LISTENPORTS; ++c) {
- if(uip_listenports[c] == port) {
- uip_listenports[c] = 0;
- return;
- }
- }
-}
-/*---------------------------------------------------------------------------*/
-void
-uip_listen(u16_t port)
-{
- for(c = 0; c < UIP_LISTENPORTS; ++c) {
- if(uip_listenports[c] == 0) {
- uip_listenports[c] = port;
- return;
- }
- }
-}
-/*---------------------------------------------------------------------------*/
-/* XXX: IP fragment reassembly: not well-tested. */
-
-#if UIP_REASSEMBLY && !UIP_CONF_IPV6
-#define UIP_REASS_BUFSIZE (UIP_BUFSIZE - UIP_LLH_LEN)
-static u8_t uip_reassbuf[UIP_REASS_BUFSIZE];
-static u8_t uip_reassbitmap[UIP_REASS_BUFSIZE / (8 * 8)];
-static const u8_t bitmap_bits[8] = {0xff, 0x7f, 0x3f, 0x1f,
- 0x0f, 0x07, 0x03, 0x01};
-static u16_t uip_reasslen;
-static u8_t uip_reassflags;
-#define UIP_REASS_FLAG_LASTFRAG 0x01
-static u8_t uip_reasstmr;
-
-#define IP_MF 0x20
-
-static u8_t
-uip_reass(void)
-{
- u16_t offset, len;
- u16_t i;
-
- /* 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(uip_reasstmr == 0) {
- memcpy(uip_reassbuf, &BUF->vhl, UIP_IPH_LEN);
- uip_reasstmr = UIP_REASS_MAXAGE;
- uip_reassflags = 0;
- /* Clear the bitmap. */
- memset(uip_reassbitmap, 0, sizeof(uip_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(BUF->srcipaddr[0] == FBUF->srcipaddr[0] &&
- BUF->srcipaddr[1] == FBUF->srcipaddr[1] &&
- BUF->destipaddr[0] == FBUF->destipaddr[0] &&
- BUF->destipaddr[1] == FBUF->destipaddr[1] &&
- BUF->ipid[0] == FBUF->ipid[0] &&
- BUF->ipid[1] == FBUF->ipid[1]) {
-
- len = (BUF->len[0] << 8) + BUF->len[1] - (BUF->vhl & 0x0f) * 4;
- offset = (((BUF->ipoffset[0] & 0x3f) << 8) + BUF->ipoffset[1]) * 8;
-
- /* If the offset or the offset + fragment length overflows the
- reassembly buffer, we discard the entire packet. */
- if(offset > UIP_REASS_BUFSIZE ||
- offset + len > UIP_REASS_BUFSIZE) {
- uip_reasstmr = 0;
- goto nullreturn;
- }
-
- /* Copy the fragment into the reassembly buffer, at the right
- offset. */
- memcpy(&uip_reassbuf[UIP_IPH_LEN + offset],
- (char *)BUF + (int)((BUF->vhl & 0x0f) * 4),
- len);
-
- /* Update the bitmap. */
- if(offset / (8 * 8) == (offset + len) / (8 * 8)) {
- /* If the two endpoints are in the same byte, we only update
- that byte. */
-
- uip_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. */
- uip_reassbitmap[offset / (8 * 8)] |=
- bitmap_bits[(offset / 8 ) & 7];
- for(i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) {
- uip_reassbitmap[i] = 0xff;
- }
- uip_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((BUF->ipoffset[0] & IP_MF) == 0) {
- uip_reassflags |= UIP_REASS_FLAG_LASTFRAG;
- uip_reasslen = offset + len;
- }
-
- /* 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(uip_reassflags & UIP_REASS_FLAG_LASTFRAG) {
- /* Check all bytes up to and including all but the last byte in
- the bitmap. */
- for(i = 0; i < uip_reasslen / (8 * 8) - 1; ++i) {
- if(uip_reassbitmap[i] != 0xff) {
- goto nullreturn;
- }
- }
- /* Check the last byte in the bitmap. It should contain just the
- right amount of bits. */
- if(uip_reassbitmap[uip_reasslen / (8 * 8)] !=
- (u8_t)~bitmap_bits[uip_reasslen / 8 & 7]) {
- goto nullreturn;
- }
-
- /* 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. */
- uip_reasstmr = 0;
- memcpy(BUF, FBUF, uip_reasslen);
-
- /* Pretend to be a "normal" (i.e., not fragmented) IP packet
- from now on. */
- BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
- BUF->len[0] = uip_reasslen >> 8;
- BUF->len[1] = uip_reasslen & 0xff;
- BUF->ipchksum = 0;
- BUF->ipchksum = ~(uip_ipchksum());
-
- return uip_reasslen;
- }
- }
-
- nullreturn:
- return 0;
-}
-#endif /* UIP_REASSEMBLY */
-/*---------------------------------------------------------------------------*/
-static void
-uip_add_rcv_nxt(u16_t n)
-{
- uip_add32(uip_conn->rcv_nxt, n);
- uip_conn->rcv_nxt[0] = uip_acc32[0];
- uip_conn->rcv_nxt[1] = uip_acc32[1];
- uip_conn->rcv_nxt[2] = uip_acc32[2];
- uip_conn->rcv_nxt[3] = uip_acc32[3];
-}
-/*---------------------------------------------------------------------------*/
-void
-uip_process(u8_t flag)
-{
- register struct uip_conn *uip_connr = uip_conn;
-
-#if UIP_UDP
- if(flag == UIP_UDP_SEND_CONN) {
- goto udp_send;
- }
-#endif /* UIP_UDP */
-
- uip_sappdata = uip_appdata = &uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN];
-
- /* Check if we were invoked because of a poll request for a
- particular connection. */
- if(flag == UIP_POLL_REQUEST) {
- if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED &&
- !uip_outstanding(uip_connr)) {
- uip_len = uip_slen = 0;
- uip_flags = UIP_POLL;
- UIP_APPCALL();
- goto appsend;
- }
- goto drop;
-
- /* Check if we were invoked because of the perodic timer fireing. */
- } else if(flag == UIP_TIMER) {
-#if UIP_REASSEMBLY
- if(uip_reasstmr != 0) {
- --uip_reasstmr;
- }
-#endif /* UIP_REASSEMBLY */
- /* Increase the initial sequence number. */
- if(++iss[3] == 0) {
- if(++iss[2] == 0) {
- if(++iss[1] == 0) {
- ++iss[0];
- }
- }
- }
-
- /* Reset the length variables. */
- uip_len = 0;
- uip_slen = 0;
-
- /* Check if the connection is in a state in which we simply wait
- for the connection to time out. If so, we increase the
- connection's timer and remove the connection if it times
- out. */
- if(uip_connr->tcpstateflags == UIP_TIME_WAIT ||
- uip_connr->tcpstateflags == UIP_FIN_WAIT_2) {
- ++(uip_connr->timer);
- if(uip_connr->timer == UIP_TIME_WAIT_TIMEOUT) {
- uip_connr->tcpstateflags = UIP_CLOSED;
- }
- } else if(uip_connr->tcpstateflags != UIP_CLOSED) {
- /* If the connection has outstanding data, we increase the
- connection's timer and see if it has reached the RTO value
- in which case we retransmit. */
- if(uip_outstanding(uip_connr)) {
- if(uip_connr->timer-- == 0) {
- if(uip_connr->nrtx == UIP_MAXRTX ||
- ((uip_connr->tcpstateflags == UIP_SYN_SENT ||
- uip_connr->tcpstateflags == UIP_SYN_RCVD) &&
- uip_connr->nrtx == UIP_MAXSYNRTX)) {
- uip_connr->tcpstateflags = UIP_CLOSED;
-
- /* We call UIP_APPCALL() with uip_flags set to
- UIP_TIMEDOUT to inform the application that the
- connection has timed out. */
- uip_flags = UIP_TIMEDOUT;
- UIP_APPCALL();
-
- /* We also send a reset packet to the remote host. */
- BUF->flags = TCP_RST | TCP_ACK;
- goto tcp_send_nodata;
- }
-
- /* Exponential backoff. */
- uip_connr->timer = UIP_RTO << (uip_connr->nrtx > 4?
- 4:
- uip_connr->nrtx);
- ++(uip_connr->nrtx);
-
- /* Ok, so we need to retransmit. We do this differently
- depending on which state we are in. In ESTABLISHED, we
- call upon the application so that it may prepare the
- data for the retransmit. In SYN_RCVD, we resend the
- SYNACK that we sent earlier and in LAST_ACK we have to
- retransmit our FINACK. */
- UIP_STAT(++uip_stat.tcp.rexmit);
- switch(uip_connr->tcpstateflags & UIP_TS_MASK) {
- case UIP_SYN_RCVD:
- /* In the SYN_RCVD state, we should retransmit our
- SYNACK. */
- goto tcp_send_synack;
-
-#if UIP_ACTIVE_OPEN
- case UIP_SYN_SENT:
- /* In the SYN_SENT state, we retransmit out SYN. */
- BUF->flags = 0;
- goto tcp_send_syn;
-#endif /* UIP_ACTIVE_OPEN */
-
- case UIP_ESTABLISHED:
- /* In the ESTABLISHED state, we call upon the application
- to do the actual retransmit after which we jump into
- the code for sending out the packet (the apprexmit
- label). */
- uip_flags = UIP_REXMIT;
- UIP_APPCALL();
- goto apprexmit;
-
- case UIP_FIN_WAIT_1:
- case UIP_CLOSING:
- case UIP_LAST_ACK:
- /* In all these states we should retransmit a FINACK. */
- goto tcp_send_finack;
-
- }
- }
- } else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED) {
- /* If there was no need for a retransmission, we poll the
- application for new data. */
- uip_len = uip_slen = 0;
- uip_flags = UIP_POLL;
- UIP_APPCALL();
- goto appsend;
- }
- }
- goto drop;
- }
-#if UIP_UDP
- if(flag == UIP_UDP_TIMER) {
- if(uip_udp_conn->lport != 0) {
- uip_conn = NULL;
- uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
- uip_len = uip_slen = 0;
- uip_flags = UIP_POLL;
- UIP_UDP_APPCALL();
- goto udp_send;
- } else {
- goto drop;
- }
- }
-#endif
-
- /* This is where the input processing starts. */
- UIP_STAT(++uip_stat.ip.recv);
-
- /* Start of IP input header processing code. */
-
-#if UIP_CONF_IPV6
- /* Check validity of the IP header. */
- if((BUF->vtc & 0xf0) != 0x60) { /* IP version and header length. */
- UIP_STAT(++uip_stat.ip.drop);
- UIP_STAT(++uip_stat.ip.vhlerr);
- UIP_LOG("ipv6: invalid version.");
- goto drop;
- }
-#else /* UIP_CONF_IPV6 */
- /* Check validity of the IP header. */
- if(BUF->vhl != 0x45) { /* IP version and header length. */
- UIP_STAT(++uip_stat.ip.drop);
- UIP_STAT(++uip_stat.ip.vhlerr);
- UIP_LOG("ip: invalid version or header length.");
- goto drop;
- }
-#endif /* UIP_CONF_IPV6 */
-
- /* Check the size of the packet. If the size reported to us in
- uip_len is smaller the size reported in the IP header, we assume
- that the packet has been corrupted in transit. If the size of
- uip_len is larger than the size reported in the IP packet header,
- the packet has been padded and we set uip_len to the correct
- value.. */
-
- if((BUF->len[0] << 8) + BUF->len[1] <= uip_len) {
- uip_len = (BUF->len[0] << 8) + BUF->len[1];
-#if UIP_CONF_IPV6
- uip_len += 40; /* The length reported in the IPv6 header is the
- length of the payload that follows the
- header. However, uIP uses the uip_len variable
- for holding the size of the entire packet,
- including the IP header. For IPv4 this is not a
- problem as the length field in the IPv4 header
- contains the length of the entire packet. But
- for IPv6 we need to add the size of the IPv6
- header (40 bytes). */
-#endif /* UIP_CONF_IPV6 */
- } else {
- UIP_LOG("ip: packet shorter than reported in IP header.");
- goto drop;
- }
-
-#if !UIP_CONF_IPV6
- /* Check the fragment flag. */
- if((BUF->ipoffset[0] & 0x3f) != 0 ||
- BUF->ipoffset[1] != 0) {
-#if UIP_REASSEMBLY
- uip_len = uip_reass();
- if(uip_len == 0) {
- goto drop;
- }
-#else /* UIP_REASSEMBLY */
- UIP_STAT(++uip_stat.ip.drop);
- UIP_STAT(++uip_stat.ip.fragerr);
- UIP_LOG("ip: fragment dropped.");
- goto drop;
-#endif /* UIP_REASSEMBLY */
- }
-#endif /* UIP_CONF_IPV6 */
-
- if(uip_ipaddr_cmp(&uip_hostaddr, &uip_all_zeroes_addr)) {
- /* If we are configured to use ping IP address configuration and
- hasn't been assigned an IP address yet, we accept all ICMP
- packets. */
-#if UIP_PINGADDRCONF && !UIP_CONF_IPV6
- if(BUF->proto == UIP_PROTO_ICMP) {
- UIP_LOG("ip: possible ping config packet received.");
- goto icmp_input;
- } else {
- UIP_LOG("ip: packet dropped since no address assigned.");
- goto drop;
- }
-#endif /* UIP_PINGADDRCONF */
-
- } else {
- /* If IP broadcast support is configured, we check for a broadcast
- UDP packet, which may be destined to us. */
-#if UIP_BROADCAST
- DEBUG_PRINTF("UDP IP checksum 0x%04x\n", uip_ipchksum());
- if(BUF->proto == UIP_PROTO_UDP &&
- uip_ipaddr_cmp(&BUF->destipaddr, &uip_broadcast_addr)
- /*&&
- uip_ipchksum() == 0xffff*/) {
- goto udp_input;
- }
-#endif /* UIP_BROADCAST */
-
- /* Check if the packet is destined for our IP address. */
-#if !UIP_CONF_IPV6
- if(!uip_ipaddr_cmp(&BUF->destipaddr, &uip_hostaddr)) {
- UIP_STAT(++uip_stat.ip.drop);
- goto drop;
- }
-#else /* UIP_CONF_IPV6 */
- /* For IPv6, packet reception is a little trickier as we need to
- make sure that we listen to certain multicast addresses (all
- hosts multicast address, and the solicited-node multicast
- address) as well. However, we will cheat here and accept all
- multicast packets that are sent to the ff02::/16 addresses. */
- if(!uip_ipaddr_cmp(&BUF->destipaddr, &uip_hostaddr) &&
- BUF->destipaddr.u16[0] != HTONS(0xff02)) {
- UIP_STAT(++uip_stat.ip.drop);
- goto drop;
- }
-#endif /* UIP_CONF_IPV6 */
- }
-
-#if !UIP_CONF_IPV6
- if(uip_ipchksum() != 0xffff) { /* Compute and check the IP header
- checksum. */
- UIP_STAT(++uip_stat.ip.drop);
- UIP_STAT(++uip_stat.ip.chkerr);
- UIP_LOG("ip: bad checksum.");
- goto drop;
- }
-#endif /* UIP_CONF_IPV6 */
-
- if(BUF->proto == UIP_PROTO_TCP) { /* Check for TCP packet. If so,
- proceed with TCP input
- processing. */
- goto tcp_input;
- }
-
-#if UIP_UDP
- if(BUF->proto == UIP_PROTO_UDP) {
- goto udp_input;
- }
-#endif /* UIP_UDP */
-
-#if !UIP_CONF_IPV6
- /* ICMPv4 processing code follows. */
- if(BUF->proto != UIP_PROTO_ICMP) { /* We only allow ICMP packets from
- here. */
- UIP_STAT(++uip_stat.ip.drop);
- UIP_STAT(++uip_stat.ip.protoerr);
- UIP_LOG("ip: neither tcp nor icmp.");
- goto drop;
- }
-
-#if UIP_PINGADDRCONF
- icmp_input:
-#endif /* UIP_PINGADDRCONF */
- UIP_STAT(++uip_stat.icmp.recv);
-
- /* ICMP echo (i.e., ping) processing. This is simple, we only change
- the ICMP type from ECHO to ECHO_REPLY and adjust the ICMP
- checksum before we return the packet. */
- if(ICMPBUF->type != ICMP_ECHO) {
- UIP_STAT(++uip_stat.icmp.drop);
- UIP_STAT(++uip_stat.icmp.typeerr);
- UIP_LOG("icmp: not icmp echo.");
- goto drop;
- }
-
- /* If we are configured to use ping IP address assignment, we use
- the destination IP address of this ping packet and assign it to
- ourself. */
-#if UIP_PINGADDRCONF
- if(uip_ipaddr_cmp(&uip_hostaddr, &uip_all_zeroes_addr)) {
- uip_hostaddr = BUF->destipaddr;
- }
-#endif /* UIP_PINGADDRCONF */
-
- ICMPBUF->type = ICMP_ECHO_REPLY;
-
- if(ICMPBUF->icmpchksum >= HTONS(0xffff - (ICMP_ECHO << 8))) {
- ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8) + 1;
- } else {
- ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8);
- }
-
- /* Swap IP addresses. */
- uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
- uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
-
- UIP_STAT(++uip_stat.icmp.sent);
- BUF->ttl = UIP_TTL;
- goto ip_send_nolen;
-
- /* End of IPv4 input header processing code. */
-#else /* !UIP_CONF_IPV6 */
-
- /* This is IPv6 ICMPv6 processing code. */
- DEBUG_PRINTF("icmp6_input: length %d\n", uip_len);
-
- if(BUF->proto != UIP_PROTO_ICMP6) { /* We only allow ICMPv6 packets from
- here. */
- UIP_STAT(++uip_stat.ip.drop);
- UIP_STAT(++uip_stat.ip.protoerr);
- UIP_LOG("ip: neither tcp nor icmp6.");
- goto drop;
- }
-
- UIP_STAT(++uip_stat.icmp.recv);
-
- /* If we get a neighbor solicitation for our address we should send
- a neighbor advertisement message back. */
- if(ICMPBUF->type == ICMP6_NEIGHBOR_SOLICITATION) {
- if(uip_ipaddr_cmp(&ICMPBUF->icmp6data, &uip_hostaddr)) {
-
- if(ICMPBUF->options[0] == ICMP6_OPTION_SOURCE_LINK_ADDRESS) {
- /* Save the sender's address in our neighbor list. */
- uip_neighbor_add(&ICMPBUF->srcipaddr, &(ICMPBUF->options[2]));
- }
-
- /* We should now send a neighbor advertisement back to where the
- neighbor solicication came from. */
- ICMPBUF->type = ICMP6_NEIGHBOR_ADVERTISEMENT;
- ICMPBUF->flags = ICMP6_FLAG_S; /* Solicited flag. */
-
- ICMPBUF->reserved1 = ICMPBUF->reserved2 = ICMPBUF->reserved3 = 0;
-
- uip_ipaddr_copy(&ICMPBUF->destipaddr, &ICMPBUF->srcipaddr);
- uip_ipaddr_copy(&ICMPBUF->srcipaddr, &uip_hostaddr);
- ICMPBUF->options[0] = ICMP6_OPTION_TARGET_LINK_ADDRESS;
- ICMPBUF->options[1] = 1; /* Options length, 1 = 8 bytes. */
- memcpy(&(ICMPBUF->options[2]), &uip_ethaddr, sizeof(uip_ethaddr));
- ICMPBUF->icmpchksum = 0;
- ICMPBUF->icmpchksum = ~uip_icmp6chksum();
-
- goto send;
-
- }
- goto drop;
- } else if(ICMPBUF->type == ICMP6_ECHO) {
- /* ICMP echo (i.e., ping) processing. This is simple, we only
- change the ICMP type from ECHO to ECHO_REPLY and update the
- ICMP checksum before we return the packet. */
-
- ICMPBUF->type = ICMP6_ECHO_REPLY;
-
- uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
- uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
- ICMPBUF->icmpchksum = 0;
- ICMPBUF->icmpchksum = ~uip_icmp6chksum();
-
- UIP_STAT(++uip_stat.icmp.sent);
- goto send;
- } else {
- DEBUG_PRINTF("Unknown icmp6 message type %d\n", ICMPBUF->type);
- UIP_STAT(++uip_stat.icmp.drop);
- UIP_STAT(++uip_stat.icmp.typeerr);
- UIP_LOG("icmp: unknown ICMP message.");
- goto drop;
- }
-
- /* End of IPv6 ICMP processing. */
-
-#endif /* !UIP_CONF_IPV6 */
-
-#if UIP_UDP
- /* UDP input processing. */
- udp_input:
- /* UDP processing is really just a hack. We don't do anything to the
- UDP/IP headers, but let the UDP application do all the hard
- work. If the application sets uip_slen, it has a packet to
- send. */
-#if UIP_UDP_CHECKSUMS
- uip_len = uip_len - UIP_IPUDPH_LEN;
- uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
- if(UDPBUF->udpchksum != 0 && uip_udpchksum() != 0xffff) {
- UIP_STAT(++uip_stat.udp.drop);
- UIP_STAT(++uip_stat.udp.chkerr);
- UIP_LOG("udp: bad checksum.");
- goto drop;
- }
-#else /* UIP_UDP_CHECKSUMS */
- uip_len = uip_len - UIP_IPUDPH_LEN;
-#endif /* UIP_UDP_CHECKSUMS */
-
- /* Demultiplex this UDP packet between the UDP "connections". */
- for(uip_udp_conn = &uip_udp_conns[0];
- uip_udp_conn < &uip_udp_conns[UIP_UDP_CONNS];
- ++uip_udp_conn) {
- /* If the local UDP port is non-zero, the connection is considered
- to be used. If so, the local port number is checked against the
- destination port number in the received packet. If the two port
- numbers match, the remote port number is checked if the
- connection is bound to a remote port. Finally, if the
- connection is bound to a remote IP address, the source IP
- address of the packet is checked. */
- if(uip_udp_conn->lport != 0 &&
- UDPBUF->destport == uip_udp_conn->lport &&
- (uip_udp_conn->rport == 0 ||
- UDPBUF->srcport == uip_udp_conn->rport) &&
- (uip_ipaddr_cmp(&uip_udp_conn->ripaddr, &uip_all_zeroes_addr) ||
- uip_ipaddr_cmp(&uip_udp_conn->ripaddr, &uip_broadcast_addr) ||
- uip_ipaddr_cmp(&BUF->srcipaddr, &uip_udp_conn->ripaddr))) {
- goto udp_found;
- }
- }
- UIP_LOG("udp: no matching connection found");
-#if UIP_CONF_ICMP_DEST_UNREACH && !UIP_CONF_IPV6
- /* Copy fields from packet header into payload of this ICMP packet. */
- memcpy(&(ICMPBUF->payload[0]), ICMPBUF, UIP_IPH_LEN + 8);
-
- /* Set the ICMP type and code. */
- ICMPBUF->type = ICMP_DEST_UNREACHABLE;
- ICMPBUF->icode = ICMP_PORT_UNREACHABLE;
-
- /* Calculate the ICMP checksum. */
- ICMPBUF->icmpchksum = 0;
- ICMPBUF->icmpchksum = ~uip_chksum((u16_t *)&(ICMPBUF->type), 36);
-
- /* Set the IP destination address to be the source address of the
- original packet. */
- uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
-
- /* Set our IP address as the source address. */
- uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
-
- /* The size of the ICMP destination unreachable packet is 36 + the
- size of the IP header (20) = 56. */
- uip_len = 36 + UIP_IPH_LEN;
- ICMPBUF->len[0] = 0;
- ICMPBUF->len[1] = (u8_t)uip_len;
- ICMPBUF->ttl = UIP_TTL;
- ICMPBUF->proto = UIP_PROTO_ICMP;
-
- goto ip_send_nolen;
-#else /* UIP_CONF_ICMP_DEST_UNREACH */
- goto drop;
-#endif /* UIP_CONF_ICMP_DEST_UNREACH */
-
- udp_found:
- uip_conn = NULL;
- uip_flags = UIP_NEWDATA;
- uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
- uip_slen = 0;
- UIP_UDP_APPCALL();
-
- udp_send:
- if(uip_slen == 0) {
- goto drop;
- }
- uip_len = uip_slen + UIP_IPUDPH_LEN;
-
-#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 */
-
- BUF->ttl = uip_udp_conn->ttl;
- BUF->proto = UIP_PROTO_UDP;
-
- UDPBUF->udplen = HTONS(uip_slen + UIP_UDPH_LEN);
- UDPBUF->udpchksum = 0;
-
- BUF->srcport = uip_udp_conn->lport;
- BUF->destport = uip_udp_conn->rport;
-
- uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
- uip_ipaddr_copy(&BUF->destipaddr, &uip_udp_conn->ripaddr);
-
- uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPTCPH_LEN];
-
-#if UIP_UDP_CHECKSUMS
- /* Calculate UDP checksum. */
- UDPBUF->udpchksum = ~(uip_udpchksum());
- if(UDPBUF->udpchksum == 0) {
- UDPBUF->udpchksum = 0xffff;
- }
-#endif /* UIP_UDP_CHECKSUMS */
-
- goto ip_send_nolen;
-#endif /* UIP_UDP */
-
- /* TCP input processing. */
- tcp_input:
- UIP_STAT(++uip_stat.tcp.recv);
-
- /* Start of TCP input header processing code. */
-
- if(uip_tcpchksum() != 0xffff) { /* Compute and check the TCP
- checksum. */
- UIP_STAT(++uip_stat.tcp.drop);
- UIP_STAT(++uip_stat.tcp.chkerr);
- UIP_LOG("tcp: bad checksum.");
- goto drop;
- }
-
- /* Demultiplex this segment. */
- /* First check any active connections. */
- for(uip_connr = &uip_conns[0]; uip_connr <= &uip_conns[UIP_CONNS - 1];
- ++uip_connr) {
- if(uip_connr->tcpstateflags != UIP_CLOSED &&
- BUF->destport == uip_connr->lport &&
- BUF->srcport == uip_connr->rport &&
- uip_ipaddr_cmp(&BUF->srcipaddr, &uip_connr->ripaddr)) {
- goto found;
- }
- }
-
- /* If we didn't find and active connection that expected the packet,
- either this packet is an old duplicate, or this is a SYN packet
- destined for a connection in LISTEN. If the SYN flag isn't set,
- it is an old packet and we send a RST. */
- if((BUF->flags & TCP_CTL) != TCP_SYN) {
- goto reset;
- }
-
- tmp16 = BUF->destport;
- /* Next, check listening connections. */
- for(c = 0; c < UIP_LISTENPORTS; ++c) {
- if(tmp16 == uip_listenports[c]) {
- goto found_listen;
- }
- }
-
- /* No matching connection found, so we send a RST packet. */
- UIP_STAT(++uip_stat.tcp.synrst);
-
- reset:
- /* We do not send resets in response to resets. */
- if(BUF->flags & TCP_RST) {
- goto drop;
- }
-
- UIP_STAT(++uip_stat.tcp.rst);
-
- BUF->flags = TCP_RST | TCP_ACK;
- uip_len = UIP_IPTCPH_LEN;
- BUF->tcpoffset = 5 << 4;
-
- /* Flip the seqno and ackno fields in the TCP header. */
- c = BUF->seqno[3];
- BUF->seqno[3] = BUF->ackno[3];
- BUF->ackno[3] = c;
-
- c = BUF->seqno[2];
- BUF->seqno[2] = BUF->ackno[2];
- BUF->ackno[2] = c;
-
- c = BUF->seqno[1];
- BUF->seqno[1] = BUF->ackno[1];
- BUF->ackno[1] = c;
-
- c = BUF->seqno[0];
- BUF->seqno[0] = BUF->ackno[0];
- BUF->ackno[0] = c;
-
- /* We also have to increase the sequence number we are
- acknowledging. If the least significant byte overflowed, we need
- to propagate the carry to the other bytes as well. */
- if(++BUF->ackno[3] == 0) {
- if(++BUF->ackno[2] == 0) {
- if(++BUF->ackno[1] == 0) {
- ++BUF->ackno[0];
- }
- }
- }
-
- /* Swap port numbers. */
- tmp16 = BUF->srcport;
- BUF->srcport = BUF->destport;
- BUF->destport = tmp16;
-
- /* Swap IP addresses. */
- uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
- uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
-
- /* And send out the RST packet! */
- goto tcp_send_noconn;
-
- /* This label will be jumped to if we matched the incoming packet
- with a connection in LISTEN. In that case, we should create a new
- connection and send a SYNACK in return. */
- found_listen:
- /* First we check if there are any connections avaliable. Unused
- connections are kept in the same table as used connections, but
- unused ones have the tcpstate set to CLOSED. Also, connections in
- TIME_WAIT are kept track of and we'll use the oldest one if no
- CLOSED connections are found. Thanks to Eddie C. Dost for a very
- nice algorithm for the TIME_WAIT search. */
- uip_connr = 0;
- for(c = 0; c < UIP_CONNS; ++c) {
- if(uip_conns[c].tcpstateflags == UIP_CLOSED) {
- uip_connr = &uip_conns[c];
- break;
- }
- if(uip_conns[c].tcpstateflags == UIP_TIME_WAIT) {
- if(uip_connr == 0 ||
- uip_conns[c].timer > uip_connr->timer) {
- uip_connr = &uip_conns[c];
- }
- }
- }
-
- if(uip_connr == 0) {
- /* All connections are used already, we drop packet and hope that
- the remote end will retransmit the packet at a time when we
- have more spare connections. */
- UIP_STAT(++uip_stat.tcp.syndrop);
- UIP_LOG("tcp: found no unused connections.");
- goto drop;
- }
- uip_conn = uip_connr;
-
- /* Fill in the necessary fields for the new connection. */
- uip_connr->rto = uip_connr->timer = UIP_RTO;
- uip_connr->sa = 0;
- uip_connr->sv = 4;
- uip_connr->nrtx = 0;
- uip_connr->lport = BUF->destport;
- uip_connr->rport = BUF->srcport;
- uip_ipaddr_copy(&uip_connr->ripaddr, &BUF->srcipaddr);
- uip_connr->tcpstateflags = UIP_SYN_RCVD;
-
- uip_connr->snd_nxt[0] = iss[0];
- uip_connr->snd_nxt[1] = iss[1];
- uip_connr->snd_nxt[2] = iss[2];
- uip_connr->snd_nxt[3] = iss[3];
- uip_connr->len = 1;
-
- /* rcv_nxt should be the seqno from the incoming packet + 1. */
- uip_connr->rcv_nxt[3] = BUF->seqno[3];
- uip_connr->rcv_nxt[2] = BUF->seqno[2];
- uip_connr->rcv_nxt[1] = BUF->seqno[1];
- uip_connr->rcv_nxt[0] = BUF->seqno[0];
- uip_add_rcv_nxt(1);
-
- /* Parse the TCP MSS option, if present. */
- if((BUF->tcpoffset & 0xf0) > 0x50) {
- for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
- opt = uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + c];
- if(opt == TCP_OPT_END) {
- /* End of options. */
- break;
- } else if(opt == TCP_OPT_NOOP) {
- ++c;
- /* NOP option. */
- } else if(opt == TCP_OPT_MSS &&
- uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
- /* An MSS option with the right option length. */
- tmp16 = ((u16_t)uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
- (u16_t)uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + 3 + c];
- uip_connr->initialmss = uip_connr->mss =
- tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
-
- /* And we are done processing options. */
- break;
- } else {
- /* All other options have a length field, so that we easily
- can skip past them. */
- if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
- /* If the length field is zero, the options are malformed
- and we don't process them further. */
- break;
- }
- c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
- }
- }
- }
-
- /* Our response will be a SYNACK. */
-#if UIP_ACTIVE_OPEN
- tcp_send_synack:
- BUF->flags = TCP_ACK;
-
- tcp_send_syn:
- BUF->flags |= TCP_SYN;
-#else /* UIP_ACTIVE_OPEN */
- tcp_send_synack:
- BUF->flags = TCP_SYN | TCP_ACK;
-#endif /* UIP_ACTIVE_OPEN */
-
- /* We send out the TCP Maximum Segment Size option with our
- SYNACK. */
- BUF->optdata[0] = TCP_OPT_MSS;
- BUF->optdata[1] = TCP_OPT_MSS_LEN;
- BUF->optdata[2] = (UIP_TCP_MSS) / 256;
- BUF->optdata[3] = (UIP_TCP_MSS) & 255;
- uip_len = UIP_IPTCPH_LEN + TCP_OPT_MSS_LEN;
- BUF->tcpoffset = ((UIP_TCPH_LEN + TCP_OPT_MSS_LEN) / 4) << 4;
- goto tcp_send;
-
- /* This label will be jumped to if we found an active connection. */
- found:
- uip_conn = uip_connr;
- uip_flags = 0;
- /* We do a very naive form of TCP reset processing; we just accept
- any RST and kill our connection. We should in fact check if the
- sequence number of this reset is wihtin our advertised window
- before we accept the reset. */
- if(BUF->flags & TCP_RST) {
- uip_connr->tcpstateflags = UIP_CLOSED;
- UIP_LOG("tcp: got reset, aborting connection.");
- uip_flags = UIP_ABORT;
- UIP_APPCALL();
- goto drop;
- }
- /* Calculate the length of the data, if the application has sent
- any data to us. */
- c = (BUF->tcpoffset >> 4) << 2;
- /* uip_len will contain the length of the actual TCP data. This is
- calculated by subtracing the length of the TCP header (in
- c) and the length of the IP header (20 bytes). */
- uip_len = uip_len - c - UIP_IPH_LEN;
-
- /* First, check if the sequence number of the incoming packet is
- what we're expecting next. If not, we send out an ACK with the
- correct numbers in. */
- if(!(((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_SENT) &&
- ((BUF->flags & TCP_CTL) == (TCP_SYN | TCP_ACK)))) {
- if((uip_len > 0 || ((BUF->flags & (TCP_SYN | TCP_FIN)) != 0)) &&
- (BUF->seqno[0] != uip_connr->rcv_nxt[0] ||
- BUF->seqno[1] != uip_connr->rcv_nxt[1] ||
- BUF->seqno[2] != uip_connr->rcv_nxt[2] ||
- BUF->seqno[3] != uip_connr->rcv_nxt[3])) {
- goto tcp_send_ack;
- }
- }
-
- /* Next, check if the incoming segment acknowledges any outstanding
- data. If so, we update the sequence number, reset the length of
- the outstanding data, calculate RTT estimations, and reset the
- retransmission timer. */
- if((BUF->flags & TCP_ACK) && uip_outstanding(uip_connr)) {
- uip_add32(uip_connr->snd_nxt, uip_connr->len);
-
- if(BUF->ackno[0] == uip_acc32[0] &&
- BUF->ackno[1] == uip_acc32[1] &&
- BUF->ackno[2] == uip_acc32[2] &&
- BUF->ackno[3] == uip_acc32[3]) {
- /* Update sequence number. */
- uip_connr->snd_nxt[0] = uip_acc32[0];
- uip_connr->snd_nxt[1] = uip_acc32[1];
- uip_connr->snd_nxt[2] = uip_acc32[2];
- uip_connr->snd_nxt[3] = uip_acc32[3];
-
- /* Do RTT estimation, unless we have done retransmissions. */
- if(uip_connr->nrtx == 0) {
- signed char m;
- m = uip_connr->rto - uip_connr->timer;
- /* This is taken directly from VJs original code in his paper */
- m = m - (uip_connr->sa >> 3);
- uip_connr->sa += m;
- if(m < 0) {
- m = -m;
- }
- m = m - (uip_connr->sv >> 2);
- uip_connr->sv += m;
- uip_connr->rto = (uip_connr->sa >> 3) + uip_connr->sv;
-
- }
- /* Set the acknowledged flag. */
- uip_flags = UIP_ACKDATA;
- /* Reset the retransmission timer. */
- uip_connr->timer = uip_connr->rto;
-
- /* Reset length of outstanding data. */
- uip_connr->len = 0;
- }
-
- }
-
- /* Do different things depending on in what state the connection is. */
- switch(uip_connr->tcpstateflags & UIP_TS_MASK) {
- /* CLOSED and LISTEN are not handled here. CLOSE_WAIT is not
- implemented, since we force the application to close when the
- peer sends a FIN (hence the application goes directly from
- ESTABLISHED to LAST_ACK). */
- case UIP_SYN_RCVD:
- /* In SYN_RCVD we have sent out a SYNACK in response to a SYN, and
- we are waiting for an ACK that acknowledges the data we sent
- out the last time. Therefore, we want to have the UIP_ACKDATA
- flag set. If so, we enter the ESTABLISHED state. */
- if(uip_flags & UIP_ACKDATA) {
- uip_connr->tcpstateflags = UIP_ESTABLISHED;
- uip_flags = UIP_CONNECTED;
- uip_connr->len = 0;
- if(uip_len > 0) {
- uip_flags |= UIP_NEWDATA;
- uip_add_rcv_nxt(uip_len);
- }
- uip_slen = 0;
- UIP_APPCALL();
- goto appsend;
- }
- goto drop;
-#if UIP_ACTIVE_OPEN
- case UIP_SYN_SENT:
- /* In SYN_SENT, we wait for a SYNACK that is sent in response to
- our SYN. The rcv_nxt is set to sequence number in the SYNACK
- plus one, and we send an ACK. We move into the ESTABLISHED
- state. */
- if((uip_flags & UIP_ACKDATA) &&
- (BUF->flags & TCP_CTL) == (TCP_SYN | TCP_ACK)) {
-
- /* Parse the TCP MSS option, if present. */
- if((BUF->tcpoffset & 0xf0) > 0x50) {
- for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
- opt = uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + c];
- if(opt == TCP_OPT_END) {
- /* End of options. */
- break;
- } else if(opt == TCP_OPT_NOOP) {
- ++c;
- /* NOP option. */
- } else if(opt == TCP_OPT_MSS &&
- uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
- /* An MSS option with the right option length. */
- tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
- uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c];
- uip_connr->initialmss =
- uip_connr->mss = tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
-
- /* And we are done processing options. */
- break;
- } else {
- /* All other options have a length field, so that we easily
- can skip past them. */
- if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
- /* If the length field is zero, the options are malformed
- and we don't process them further. */
- break;
- }
- c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
- }
- }
- }
- uip_connr->tcpstateflags = UIP_ESTABLISHED;
- uip_connr->rcv_nxt[0] = BUF->seqno[0];
- uip_connr->rcv_nxt[1] = BUF->seqno[1];
- uip_connr->rcv_nxt[2] = BUF->seqno[2];
- uip_connr->rcv_nxt[3] = BUF->seqno[3];
- uip_add_rcv_nxt(1);
- uip_flags = UIP_CONNECTED | UIP_NEWDATA;
- uip_connr->len = 0;
- uip_len = 0;
- uip_slen = 0;
- UIP_APPCALL();
- goto appsend;
- }
- /* Inform the application that the connection failed */
- uip_flags = UIP_ABORT;
- UIP_APPCALL();
- /* The connection is closed after we send the RST */
- uip_conn->tcpstateflags = UIP_CLOSED;
- goto reset;
-#endif /* UIP_ACTIVE_OPEN */
-
- case UIP_ESTABLISHED:
- /* In the ESTABLISHED state, we call upon the application to feed
- data into the uip_buf. If the UIP_ACKDATA flag is set, the
- application should put new data into the buffer, otherwise we are
- retransmitting an old segment, and the application should put that
- data into the buffer.
-
- If the incoming packet is a FIN, we should close the connection on
- this side as well, and we send out a FIN and enter the LAST_ACK
- state. We require that there is no outstanding data; otherwise the
- sequence numbers will be screwed up. */
-
- if(BUF->flags & TCP_FIN && !(uip_connr->tcpstateflags & UIP_STOPPED)) {
- if(uip_outstanding(uip_connr)) {
- goto drop;
- }
- uip_add_rcv_nxt(1 + uip_len);
- uip_flags |= UIP_CLOSE;
- if(uip_len > 0) {
- uip_flags |= UIP_NEWDATA;
- }
- UIP_APPCALL();
- uip_connr->len = 1;
- uip_connr->tcpstateflags = UIP_LAST_ACK;
- uip_connr->nrtx = 0;
- tcp_send_finack:
- BUF->flags = TCP_FIN | TCP_ACK;
- goto tcp_send_nodata;
- }
-
- /* Check the URG flag. If this is set, the segment carries urgent
- data that we must pass to the application. */
- if((BUF->flags & TCP_URG) != 0) {
-#if UIP_URGDATA > 0
- uip_urglen = (BUF->urgp[0] << 8) | BUF->urgp[1];
- if(uip_urglen > uip_len) {
- /* There is more urgent data in the next segment to come. */
- uip_urglen = uip_len;
- }
- uip_add_rcv_nxt(uip_urglen);
- uip_len -= uip_urglen;
- uip_urgdata = uip_appdata;
- uip_appdata += uip_urglen;
- } else {
- uip_urglen = 0;
-#else /* UIP_URGDATA > 0 */
- uip_appdata = ((char *)uip_appdata) + ((BUF->urgp[0] << 8) | BUF->urgp[1]);
- uip_len -= (BUF->urgp[0] << 8) | BUF->urgp[1];
-#endif /* UIP_URGDATA > 0 */
- }
-
- /* If uip_len > 0 we have TCP data in the packet, and we flag this
- by setting the UIP_NEWDATA flag and update the sequence number
- we acknowledge. If the application has stopped the dataflow
- using uip_stop(), we must not accept any data packets from the
- remote host. */
- if(uip_len > 0 && !(uip_connr->tcpstateflags & UIP_STOPPED)) {
- uip_flags |= UIP_NEWDATA;
- uip_add_rcv_nxt(uip_len);
- }
-
- /* Check if the available buffer space advertised by the other end
- is smaller than the initial MSS for this connection. If so, we
- set the current MSS to the window size to ensure that the
- application does not send more data than the other end can
- handle.
-
- If the remote host advertises a zero window, we set the MSS to
- the initial MSS so that the application will send an entire MSS
- of data. This data will not be acknowledged by the receiver,
- and the application will retransmit it. This is called the
- "persistent timer" and uses the retransmission mechanim.
- */
- tmp16 = ((u16_t)BUF->wnd[0] << 8) + (u16_t)BUF->wnd[1];
- if(tmp16 > uip_connr->initialmss ||
- tmp16 == 0) {
- tmp16 = uip_connr->initialmss;
- }
- uip_connr->mss = tmp16;
-
- /* If this packet constitutes an ACK for outstanding data (flagged
- by the UIP_ACKDATA flag, we should call the application since it
- might want to send more data. If the incoming packet had data
- from the peer (as flagged by the UIP_NEWDATA flag), the
- application must also be notified.
-
- When the application is called, the global variable uip_len
- contains the length of the incoming data. The application can
- access the incoming data through the global pointer
- uip_appdata, which usually points UIP_IPTCPH_LEN + UIP_LLH_LEN
- bytes into the uip_buf array.
-
- If the application wishes to send any data, this data should be
- put into the uip_appdata and the length of the data should be
- put into uip_len. If the application don't have any data to
- send, uip_len must be set to 0. */
- if(uip_flags & (UIP_NEWDATA | UIP_ACKDATA)) {
- uip_slen = 0;
- UIP_APPCALL();
-
- appsend:
-
- if(uip_flags & UIP_ABORT) {
- uip_slen = 0;
- uip_connr->tcpstateflags = UIP_CLOSED;
- BUF->flags = TCP_RST | TCP_ACK;
- goto tcp_send_nodata;
- }
-
- if(uip_flags & UIP_CLOSE) {
- uip_slen = 0;
- uip_connr->len = 1;
- uip_connr->tcpstateflags = UIP_FIN_WAIT_1;
- uip_connr->nrtx = 0;
- BUF->flags = TCP_FIN | TCP_ACK;
- goto tcp_send_nodata;
- }
-
- /* If uip_slen > 0, the application has data to be sent. */
- if(uip_slen > 0) {
-
- /* If the connection has acknowledged data, the contents of
- the ->len variable should be discarded. */
- if((uip_flags & UIP_ACKDATA) != 0) {
- uip_connr->len = 0;
- }
-
- /* If the ->len variable is non-zero the connection has
- already data in transit and cannot send anymore right
- now. */
- if(uip_connr->len == 0) {
-
- /* The application cannot send more than what is allowed by
- the mss (the minumum of the MSS and the available
- window). */
- if(uip_slen > uip_connr->mss) {
- uip_slen = uip_connr->mss;
- }
-
- /* Remember how much data we send out now so that we know
- when everything has been acknowledged. */
- uip_connr->len = uip_slen;
- } else {
-
- /* If the application already had unacknowledged data, we
- make sure that the application does not send (i.e.,
- retransmit) out more than it previously sent out. */
- uip_slen = uip_connr->len;
- }
- }
- uip_connr->nrtx = 0;
- apprexmit:
- uip_appdata = uip_sappdata;
-
- /* If the application has data to be sent, or if the incoming
- packet had new data in it, we must send out a packet. */
- if(uip_slen > 0 && uip_connr->len > 0) {
- /* Add the length of the IP and TCP headers. */
- uip_len = uip_connr->len + UIP_TCPIP_HLEN;
- /* We always set the ACK flag in response packets. */
- BUF->flags = TCP_ACK | TCP_PSH;
- /* Send the packet. */
- goto tcp_send_noopts;
- }
- /* If there is no data to send, just send out a pure ACK if
- there is newdata. */
- if(uip_flags & UIP_NEWDATA) {
- uip_len = UIP_TCPIP_HLEN;
- BUF->flags = TCP_ACK;
- goto tcp_send_noopts;
- }
- }
- goto drop;
- case UIP_LAST_ACK:
- /* We can close this connection if the peer has acknowledged our
- FIN. This is indicated by the UIP_ACKDATA flag. */
- if(uip_flags & UIP_ACKDATA) {
- uip_connr->tcpstateflags = UIP_CLOSED;
- uip_flags = UIP_CLOSE;
- UIP_APPCALL();
- }
- break;
-
- case UIP_FIN_WAIT_1:
- /* The application has closed the connection, but the remote host
- hasn't closed its end yet. Thus we do nothing but wait for a
- FIN from the other side. */
- if(uip_len > 0) {
- uip_add_rcv_nxt(uip_len);
- }
- if(BUF->flags & TCP_FIN) {
- if(uip_flags & UIP_ACKDATA) {
- uip_connr->tcpstateflags = UIP_TIME_WAIT;
- uip_connr->timer = 0;
- uip_connr->len = 0;
- } else {
- uip_connr->tcpstateflags = UIP_CLOSING;
- }
- uip_add_rcv_nxt(1);
- uip_flags = UIP_CLOSE;
- UIP_APPCALL();
- goto tcp_send_ack;
- } else if(uip_flags & UIP_ACKDATA) {
- uip_connr->tcpstateflags = UIP_FIN_WAIT_2;
- uip_connr->len = 0;
- goto drop;
- }
- if(uip_len > 0) {
- goto tcp_send_ack;
- }
- goto drop;
-
- case UIP_FIN_WAIT_2:
- if(uip_len > 0) {
- uip_add_rcv_nxt(uip_len);
- }
- if(BUF->flags & TCP_FIN) {
- uip_connr->tcpstateflags = UIP_TIME_WAIT;
- uip_connr->timer = 0;
- uip_add_rcv_nxt(1);
- uip_flags = UIP_CLOSE;
- UIP_APPCALL();
- goto tcp_send_ack;
- }
- if(uip_len > 0) {
- goto tcp_send_ack;
- }
- goto drop;
-
- case UIP_TIME_WAIT:
- goto tcp_send_ack;
-
- case UIP_CLOSING:
- if(uip_flags & UIP_ACKDATA) {
- uip_connr->tcpstateflags = UIP_TIME_WAIT;
- uip_connr->timer = 0;
- }
- }
- goto drop;
-
- /* We jump here when we are ready to send the packet, and just want
- to set the appropriate TCP sequence numbers in the TCP header. */
- tcp_send_ack:
- BUF->flags = TCP_ACK;
-
- tcp_send_nodata:
- uip_len = UIP_IPTCPH_LEN;
-
- tcp_send_noopts:
- BUF->tcpoffset = (UIP_TCPH_LEN / 4) << 4;
-
- /* We're done with the input processing. We are now ready to send a
- reply. Our job is to fill in all the fields of the TCP and IP
- headers before calculating the checksum and finally send the
- packet. */
- tcp_send:
- BUF->ackno[0] = uip_connr->rcv_nxt[0];
- BUF->ackno[1] = uip_connr->rcv_nxt[1];
- BUF->ackno[2] = uip_connr->rcv_nxt[2];
- BUF->ackno[3] = uip_connr->rcv_nxt[3];
-
- BUF->seqno[0] = uip_connr->snd_nxt[0];
- BUF->seqno[1] = uip_connr->snd_nxt[1];
- BUF->seqno[2] = uip_connr->snd_nxt[2];
- BUF->seqno[3] = uip_connr->snd_nxt[3];
-
- BUF->proto = UIP_PROTO_TCP;
-
- BUF->srcport = uip_connr->lport;
- BUF->destport = uip_connr->rport;
-
- uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
- uip_ipaddr_copy(&BUF->destipaddr, &uip_connr->ripaddr);
-
- if(uip_connr->tcpstateflags & UIP_STOPPED) {
- /* If the connection has issued uip_stop(), we advertise a zero
- window so that the remote host will stop sending data. */
- BUF->wnd[0] = BUF->wnd[1] = 0;
- } else {
- BUF->wnd[0] = ((UIP_RECEIVE_WINDOW) >> 8);
- BUF->wnd[1] = ((UIP_RECEIVE_WINDOW) & 0xff);
- }
-
- tcp_send_noconn:
- BUF->ttl = UIP_TTL;
-#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 */
-
- BUF->urgp[0] = BUF->urgp[1] = 0;
-
- /* Calculate TCP checksum. */
- BUF->tcpchksum = 0;
- BUF->tcpchksum = ~(uip_tcpchksum());
-
- ip_send_nolen:
-#if UIP_CONF_IPV6
- BUF->vtc = 0x60;
- BUF->tcflow = 0x00;
- BUF->flow = 0x00;
-#else /* UIP_CONF_IPV6 */
- BUF->vhl = 0x45;
- BUF->tos = 0;
- BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
- ++ipid;
- BUF->ipid[0] = ipid >> 8;
- BUF->ipid[1] = ipid & 0xff;
- /* Calculate IP checksum. */
- BUF->ipchksum = 0;
- BUF->ipchksum = ~(uip_ipchksum());
- DEBUG_PRINTF("uip ip_send_nolen: chkecum 0x%04x\n", uip_ipchksum());
-#endif /* UIP_CONF_IPV6 */
- UIP_STAT(++uip_stat.tcp.sent);
-#if UIP_CONF_IPV6
- send:
-#endif /* UIP_CONF_IPV6 */
- DEBUG_PRINTF("Sending packet with length %d (%d)\n", uip_len,
- (BUF->len[0] << 8) | BUF->len[1]);
-
- UIP_STAT(++uip_stat.ip.sent);
- /* Return and let the caller do the actual transmission. */
- uip_flags = 0;
- return;
-
- drop:
- uip_len = 0;
- uip_flags = 0;
- return;
-}
-/*---------------------------------------------------------------------------*/
-u16_t
-htons(u16_t val)
-{
- return HTONS(val);
-}
-
-u32_t
-htonl(u32_t val)
-{
- return HTONL(val);
-}
-/*---------------------------------------------------------------------------*/
-void
-uip_send(const void *data, int len)
-{
- int copylen;
-#define MIN(a,b) ((a) < (b)? (a): (b))
- copylen = MIN(len, UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN -
- (int)((char *)uip_sappdata - (char *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN]));
- if(copylen > 0) {
- uip_slen = copylen;
- if(data != uip_sappdata) {
- memcpy(uip_sappdata, (data), uip_slen);
- }
- }
-}
-/*---------------------------------------------------------------------------*/
-/** @} */
-#endif /* UIP_CONF_IPV6 */
+#define DEBUG_PRINTF(...) /*printf(__VA_ARGS__)*/
+
+/**
+ * \addtogroup uip
+ * @{
+ */
+
+/**
+ * \file
+ * The uIP TCP/IP stack code.
+ * \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.c,v 1.15 2008/10/15 08:08:32 adamdunkels Exp $
+ *
+ */
+
+/*
+ * uIP is a small implementation of the IP, UDP and TCP protocols (as
+ * well as some basic ICMP stuff). The implementation couples the IP,
+ * UDP, TCP and the application layers very tightly. To keep the size
+ * of the compiled code down, this code frequently uses the goto
+ * statement. While it would be possible to break the uip_process()
+ * function into many smaller functions, this would increase the code
+ * size because of the overhead of parameter passing and the fact that
+ * the optimier would not be as efficient.
+ *
+ * The principle is that we have a small buffer, called the uip_buf,
+ * in which the device driver puts an incoming packet. The TCP/IP
+ * stack parses the headers in the packet, and calls the
+ * application. If the remote host has sent data to the application,
+ * this data is present in the uip_buf and the application read the
+ * data from there. It is up to the application to put this data into
+ * a byte stream if needed. The application will not be fed with data
+ * that is out of sequence.
+ *
+ * If the application whishes to send data to the peer, it should put
+ * its data into the uip_buf. The uip_appdata pointer points to the
+ * first available byte. The TCP/IP stack will calculate the
+ * checksums, and fill in the necessary header fields and finally send
+ * the packet back to the peer.
+*/
+
+#include "uip.h"
+#include "uipopt.h"
+#include "uip_arp.h"
+
+#if !UIP_CONF_IPV6 /* If UIP_CONF_IPV6 is defined, we compile the
+ uip6.c file instead of this one. Therefore
+ this #ifndef removes the entire compilation
+ output of the uip.c file */
+
+
+#if UIP_CONF_IPV6
+#include "net/uip-neighbor.h"
+#endif /* UIP_CONF_IPV6 */
+
+#include <string.h>
+
+/*---------------------------------------------------------------------------*/
+/* Variable definitions. */
+
+
+/* The IP address of this host. If it is defined to be fixed (by
+ setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set
+ here. Otherwise, the address */
+#if UIP_FIXEDADDR > 0
+const uip_ipaddr_t uip_hostaddr =
+ { UIP_IPADDR0, UIP_IPADDR1, UIP_IPADDR2, UIP_IPADDR3 };
+const uip_ipaddr_t uip_draddr =
+ { UIP_DRIPADDR0, UIP_DRIPADDR1, UIP_DRIPADDR2, UIP_DRIPADDR3 };
+const uip_ipaddr_t uip_netmask =
+ { UIP_NETMASK0, UIP_NETMASK1, UIP_NETMASK2, UIP_NETMASK3 };
+#else
+uip_ipaddr_t uip_hostaddr, uip_draddr, uip_netmask;
+#endif /* UIP_FIXEDADDR */
+
+const uip_ipaddr_t uip_broadcast_addr =
+#if UIP_CONF_IPV6
+ { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
+#else /* UIP_CONF_IPV6 */
+ { { 0xff, 0xff, 0xff, 0xff } };
+#endif /* UIP_CONF_IPV6 */
+const uip_ipaddr_t uip_all_zeroes_addr = { { 0x0, /* rest is 0 */ } };
+
+#if UIP_FIXEDETHADDR
+const struct uip_eth_addr uip_ethaddr = {{UIP_ETHADDR0,
+ UIP_ETHADDR1,
+ UIP_ETHADDR2,
+ UIP_ETHADDR3,
+ UIP_ETHADDR4,
+ UIP_ETHADDR5}};
+#else
+struct uip_eth_addr uip_ethaddr = {{0,0,0,0,0,0}};
+#endif
+
+#ifndef UIP_CONF_EXTERNAL_BUFFER
+u8_t uip_buf[UIP_BUFSIZE + 2]; /* The packet buffer that contains
+ incoming packets. */
+#endif /* UIP_CONF_EXTERNAL_BUFFER */
+
+void *uip_appdata; /* The uip_appdata pointer points to
+ application data. */
+void *uip_sappdata; /* The uip_appdata pointer points to
+ the application data which is to
+ be sent. */
+#if UIP_URGDATA > 0
+void *uip_urgdata; /* The uip_urgdata pointer points to
+ urgent data (out-of-band data), if
+ present. */
+u16_t uip_urglen, uip_surglen;
+#endif /* UIP_URGDATA > 0 */
+
+u16_t uip_len, uip_slen;
+ /* The uip_len is either 8 or 16 bits,
+ depending on the maximum packet
+ size. */
+
+u8_t uip_flags; /* The uip_flags variable is used for
+ communication between the TCP/IP stack
+ and the application program. */
+struct uip_conn *uip_conn; /* uip_conn always points to the current
+ connection. */
+
+struct uip_conn uip_conns[UIP_CONNS];
+ /* The uip_conns array holds all TCP
+ connections. */
+u16_t uip_listenports[UIP_LISTENPORTS];
+ /* The uip_listenports list all currently
+ listning ports. */
+#if UIP_UDP
+struct uip_udp_conn *uip_udp_conn;
+struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
+#endif /* UIP_UDP */
+
+static u16_t ipid; /* Ths ipid variable is an increasing
+ number that is used for the IP ID
+ field. */
+
+void uip_setipid(u16_t id) { ipid = id; }
+
+static u8_t iss[4]; /* The iss variable is used for the TCP
+ initial sequence number. */
+
+#if UIP_ACTIVE_OPEN
+static u16_t lastport; /* Keeps track of the last port used for
+ a new connection. */
+#endif /* UIP_ACTIVE_OPEN */
+
+/* Temporary variables. */
+u8_t uip_acc32[4];
+static u8_t c, opt;
+static u16_t tmp16;
+
+/* Structures and definitions. */
+#define TCP_FIN 0x01
+#define TCP_SYN 0x02
+#define TCP_RST 0x04
+#define TCP_PSH 0x08
+#define TCP_ACK 0x10
+#define TCP_URG 0x20
+#define TCP_CTL 0x3f
+
+#define TCP_OPT_END 0 /* End of TCP options list */
+#define TCP_OPT_NOOP 1 /* "No-operation" TCP option */
+#define TCP_OPT_MSS 2 /* Maximum segment size TCP option */
+
+#define TCP_OPT_MSS_LEN 4 /* Length of TCP MSS option. */
+
+#define ICMP_ECHO_REPLY 0
+#define ICMP_ECHO 8
+
+#define ICMP_DEST_UNREACHABLE 3
+#define ICMP_PORT_UNREACHABLE 3
+
+#define ICMP6_ECHO_REPLY 129
+#define ICMP6_ECHO 128
+#define ICMP6_NEIGHBOR_SOLICITATION 135
+#define ICMP6_NEIGHBOR_ADVERTISEMENT 136
+
+#define ICMP6_FLAG_S (1 << 6)
+
+#define ICMP6_OPTION_SOURCE_LINK_ADDRESS 1
+#define ICMP6_OPTION_TARGET_LINK_ADDRESS 2
+
+
+/* Macros. */
+#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
+#define FBUF ((struct uip_tcpip_hdr *)&uip_reassbuf[0])
+#define ICMPBUF ((struct uip_icmpip_hdr *)&uip_buf[UIP_LLH_LEN])
+#define UDPBUF ((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])
+
+
+#if UIP_STATISTICS == 1
+struct uip_stats uip_stat;
+#define UIP_STAT(s) s
+#else
+#define UIP_STAT(s)
+#endif /* UIP_STATISTICS == 1 */
+
+#if UIP_LOGGING == 1
+#include <stdio.h>
+void uip_log(char *msg);
+#define UIP_LOG(m) uip_log(m)
+#else
+#define UIP_LOG(m)
+#endif /* UIP_LOGGING == 1 */
+
+#if ! UIP_ARCH_ADD32
+void
+uip_add32(u8_t *op32, u16_t op16)
+{
+ uip_acc32[3] = op32[3] + (op16 & 0xff);
+ uip_acc32[2] = op32[2] + (op16 >> 8);
+ uip_acc32[1] = op32[1];
+ uip_acc32[0] = op32[0];
+
+ if(uip_acc32[2] < (op16 >> 8)) {
+ ++uip_acc32[1];
+ if(uip_acc32[1] == 0) {
+ ++uip_acc32[0];
+ }
+ }
+
+
+ if(uip_acc32[3] < (op16 & 0xff)) {
+ ++uip_acc32[2];
+ if(uip_acc32[2] == 0) {
+ ++uip_acc32[1];
+ if(uip_acc32[1] == 0) {
+ ++uip_acc32[0];
+ }
+ }
+ }
+}
+
+#endif /* UIP_ARCH_ADD32 */
+
+#if ! UIP_ARCH_CHKSUM
+/*---------------------------------------------------------------------------*/
+static u16_t
+chksum(u16_t sum, const u8_t *data, u16_t len)
+{
+ u16_t t;
+ const u8_t *dataptr;
+ const u8_t *last_byte;
+
+ dataptr = data;
+ last_byte = data + len - 1;
+
+ while(dataptr < last_byte) { /* At least two more bytes */
+ t = (dataptr[0] << 8) + dataptr[1];
+ sum += t;
+ if(sum < t) {
+ sum++; /* carry */
+ }
+ dataptr += 2;
+ }
+
+ if(dataptr == last_byte) {
+ t = (dataptr[0] << 8) + 0;
+ sum += t;
+ if(sum < t) {
+ sum++; /* carry */
+ }
+ }
+
+ /* Return sum in host byte order. */
+ return sum;
+}
+/*---------------------------------------------------------------------------*/
+u16_t
+uip_chksum(u16_t *data, u16_t len)
+{
+ return htons(chksum(0, (u8_t *)data, len));
+}
+/*---------------------------------------------------------------------------*/
+#ifndef UIP_ARCH_IPCHKSUM
+u16_t
+uip_ipchksum(void)
+{
+ u16_t sum;
+
+ sum = chksum(0, &uip_buf[UIP_LLH_LEN], UIP_IPH_LEN);
+ DEBUG_PRINTF("uip_ipchksum: sum 0x%04x\n", sum);
+ return (sum == 0) ? 0xffff : htons(sum);
+}
+#endif
+/*---------------------------------------------------------------------------*/
+static u16_t
+upper_layer_chksum(u8_t proto)
+{
+ u16_t upper_layer_len;
+ u16_t sum;
+
+#if UIP_CONF_IPV6
+ upper_layer_len = (((u16_t)(BUF->len[0]) << 8) + BUF->len[1]);
+#else /* UIP_CONF_IPV6 */
+ upper_layer_len = (((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) - UIP_IPH_LEN;
+#endif /* UIP_CONF_IPV6 */
+
+ /* First sum pseudoheader. */
+
+ /* IP protocol and length fields. This addition cannot carry. */
+ sum = upper_layer_len + proto;
+ /* Sum IP source and destination addresses. */
+ sum = chksum(sum, (u8_t *)&BUF->srcipaddr, 2 * sizeof(uip_ipaddr_t));
+
+ /* Sum TCP header and data. */
+ sum = chksum(sum, &uip_buf[UIP_IPH_LEN + UIP_LLH_LEN],
+ upper_layer_len);
+
+ return (sum == 0) ? 0xffff : htons(sum);
+}
+/*---------------------------------------------------------------------------*/
+#if UIP_CONF_IPV6
+u16_t
+uip_icmp6chksum(void)
+{
+ return upper_layer_chksum(UIP_PROTO_ICMP6);
+
+}
+#endif /* UIP_CONF_IPV6 */
+/*---------------------------------------------------------------------------*/
+u16_t
+uip_tcpchksum(void)
+{
+ return upper_layer_chksum(UIP_PROTO_TCP);
+}
+/*---------------------------------------------------------------------------*/
+#if UIP_UDP_CHECKSUMS
+u16_t
+uip_udpchksum(void)
+{
+ return upper_layer_chksum(UIP_PROTO_UDP);
+}
+#endif /* UIP_UDP_CHECKSUMS */
+#endif /* UIP_ARCH_CHKSUM */
+/*---------------------------------------------------------------------------*/
+void
+uip_init(void)
+{
+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
+ uip_listenports[c] = 0;
+ }
+ for(c = 0; c < UIP_CONNS; ++c) {
+ uip_conns[c].tcpstateflags = UIP_CLOSED;
+ }
+#if UIP_ACTIVE_OPEN
+ lastport = 1024;
+#endif /* UIP_ACTIVE_OPEN */
+
+#if UIP_UDP
+ for(c = 0; c < UIP_UDP_CONNS; ++c) {
+ uip_udp_conns[c].lport = 0;
+ }
+#endif /* UIP_UDP */
+
+
+ /* IPv4 initialization. */
+#if UIP_FIXEDADDR == 0
+ /* uip_hostaddr[0] = uip_hostaddr[1] = 0;*/
+#endif /* UIP_FIXEDADDR */
+
+}
+/*---------------------------------------------------------------------------*/
+#if UIP_ACTIVE_OPEN
+struct uip_conn *
+uip_connect(uip_ipaddr_t *ripaddr, u16_t rport)
+{
+ register struct uip_conn *conn, *cconn;
+
+ /* Find an unused local port. */
+ again:
+ ++lastport;
+
+ if(lastport >= 32000) {
+ lastport = 4096;
+ }
+
+ /* Check if this port is already in use, and if so try to find
+ another one. */
+ for(c = 0; c < UIP_CONNS; ++c) {
+ conn = &uip_conns[c];
+ if(conn->tcpstateflags != UIP_CLOSED &&
+ conn->lport == htons(lastport)) {
+ goto again;
+ }
+ }
+
+ conn = 0;
+ for(c = 0; c < UIP_CONNS; ++c) {
+ cconn = &uip_conns[c];
+ if(cconn->tcpstateflags == UIP_CLOSED) {
+ conn = cconn;
+ break;
+ }
+ if(cconn->tcpstateflags == UIP_TIME_WAIT) {
+ if(conn == 0 ||
+ cconn->timer > conn->timer) {
+ conn = cconn;
+ }
+ }
+ }
+
+ if(conn == 0) {
+ return 0;
+ }
+
+ conn->tcpstateflags = UIP_SYN_SENT;
+
+ conn->snd_nxt[0] = iss[0];
+ conn->snd_nxt[1] = iss[1];
+ conn->snd_nxt[2] = iss[2];
+ conn->snd_nxt[3] = iss[3];
+
+ conn->initialmss = conn->mss = UIP_TCP_MSS;
+
+ conn->len = 1; /* TCP length of the SYN is one. */
+ conn->nrtx = 0;
+ conn->timer = 1; /* Send the SYN next time around. */
+ conn->rto = UIP_RTO;
+ conn->sa = 0;
+ conn->sv = 16; /* Initial value of the RTT variance. */
+ conn->lport = htons(lastport);
+ conn->rport = rport;
+ uip_ipaddr_copy(&conn->ripaddr, ripaddr);
+
+ return conn;
+}
+#endif /* UIP_ACTIVE_OPEN */
+/*---------------------------------------------------------------------------*/
+#if UIP_UDP
+struct uip_udp_conn *
+uip_udp_new(const uip_ipaddr_t *ripaddr, u16_t rport)
+{
+ register struct uip_udp_conn *conn;
+
+ /* Find an unused local port. */
+ again:
+ ++lastport;
+
+ if(lastport >= 32000) {
+ lastport = 4096;
+ }
+
+ for(c = 0; c < UIP_UDP_CONNS; ++c) {
+ if(uip_udp_conns[c].lport == htons(lastport)) {
+ goto again;
+ }
+ }
+
+
+ conn = 0;
+ for(c = 0; c < UIP_UDP_CONNS; ++c) {
+ if(uip_udp_conns[c].lport == 0) {
+ conn = &uip_udp_conns[c];
+ break;
+ }
+ }
+
+ if(conn == 0) {
+ return 0;
+ }
+
+ conn->lport = HTONS(lastport);
+ conn->rport = rport;
+ if(ripaddr == NULL) {
+ memset(&conn->ripaddr, 0, sizeof(uip_ipaddr_t));
+ } else {
+ uip_ipaddr_copy(&conn->ripaddr, ripaddr);
+ }
+ conn->ttl = UIP_TTL;
+
+ return conn;
+}
+#endif /* UIP_UDP */
+/*---------------------------------------------------------------------------*/
+void
+uip_unlisten(u16_t port)
+{
+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
+ if(uip_listenports[c] == port) {
+ uip_listenports[c] = 0;
+ return;
+ }
+ }
+}
+/*---------------------------------------------------------------------------*/
+void
+uip_listen(u16_t port)
+{
+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
+ if(uip_listenports[c] == 0) {
+ uip_listenports[c] = port;
+ return;
+ }
+ }
+}
+/*---------------------------------------------------------------------------*/
+/* XXX: IP fragment reassembly: not well-tested. */
+
+#if UIP_REASSEMBLY && !UIP_CONF_IPV6
+#define UIP_REASS_BUFSIZE (UIP_BUFSIZE - UIP_LLH_LEN)
+static u8_t uip_reassbuf[UIP_REASS_BUFSIZE];
+static u8_t uip_reassbitmap[UIP_REASS_BUFSIZE / (8 * 8)];
+static const u8_t bitmap_bits[8] = {0xff, 0x7f, 0x3f, 0x1f,
+ 0x0f, 0x07, 0x03, 0x01};
+static u16_t uip_reasslen;
+static u8_t uip_reassflags;
+#define UIP_REASS_FLAG_LASTFRAG 0x01
+static u8_t uip_reasstmr;
+
+#define IP_MF 0x20
+
+static u8_t
+uip_reass(void)
+{
+ u16_t offset, len;
+ u16_t i;
+
+ /* 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(uip_reasstmr == 0) {
+ memcpy(uip_reassbuf, &BUF->vhl, UIP_IPH_LEN);
+ uip_reasstmr = UIP_REASS_MAXAGE;
+ uip_reassflags = 0;
+ /* Clear the bitmap. */
+ memset(uip_reassbitmap, 0, sizeof(uip_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(BUF->srcipaddr[0] == FBUF->srcipaddr[0] &&
+ BUF->srcipaddr[1] == FBUF->srcipaddr[1] &&
+ BUF->destipaddr[0] == FBUF->destipaddr[0] &&
+ BUF->destipaddr[1] == FBUF->destipaddr[1] &&
+ BUF->ipid[0] == FBUF->ipid[0] &&
+ BUF->ipid[1] == FBUF->ipid[1]) {
+
+ len = (BUF->len[0] << 8) + BUF->len[1] - (BUF->vhl & 0x0f) * 4;
+ offset = (((BUF->ipoffset[0] & 0x3f) << 8) + BUF->ipoffset[1]) * 8;
+
+ /* If the offset or the offset + fragment length overflows the
+ reassembly buffer, we discard the entire packet. */
+ if(offset > UIP_REASS_BUFSIZE ||
+ offset + len > UIP_REASS_BUFSIZE) {
+ uip_reasstmr = 0;
+ goto nullreturn;
+ }
+
+ /* Copy the fragment into the reassembly buffer, at the right
+ offset. */
+ memcpy(&uip_reassbuf[UIP_IPH_LEN + offset],
+ (char *)BUF + (int)((BUF->vhl & 0x0f) * 4),
+ len);
+
+ /* Update the bitmap. */
+ if(offset / (8 * 8) == (offset + len) / (8 * 8)) {
+ /* If the two endpoints are in the same byte, we only update
+ that byte. */
+
+ uip_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. */
+ uip_reassbitmap[offset / (8 * 8)] |=
+ bitmap_bits[(offset / 8 ) & 7];
+ for(i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) {
+ uip_reassbitmap[i] = 0xff;
+ }
+ uip_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((BUF->ipoffset[0] & IP_MF) == 0) {
+ uip_reassflags |= UIP_REASS_FLAG_LASTFRAG;
+ uip_reasslen = offset + len;
+ }
+
+ /* 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(uip_reassflags & UIP_REASS_FLAG_LASTFRAG) {
+ /* Check all bytes up to and including all but the last byte in
+ the bitmap. */
+ for(i = 0; i < uip_reasslen / (8 * 8) - 1; ++i) {
+ if(uip_reassbitmap[i] != 0xff) {
+ goto nullreturn;
+ }
+ }
+ /* Check the last byte in the bitmap. It should contain just the
+ right amount of bits. */
+ if(uip_reassbitmap[uip_reasslen / (8 * 8)] !=
+ (u8_t)~bitmap_bits[uip_reasslen / 8 & 7]) {
+ goto nullreturn;
+ }
+
+ /* 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. */
+ uip_reasstmr = 0;
+ memcpy(BUF, FBUF, uip_reasslen);
+
+ /* Pretend to be a "normal" (i.e., not fragmented) IP packet
+ from now on. */
+ BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
+ BUF->len[0] = uip_reasslen >> 8;
+ BUF->len[1] = uip_reasslen & 0xff;
+ BUF->ipchksum = 0;
+ BUF->ipchksum = ~(uip_ipchksum());
+
+ return uip_reasslen;
+ }
+ }
+
+ nullreturn:
+ return 0;
+}
+#endif /* UIP_REASSEMBLY */
+/*---------------------------------------------------------------------------*/
+static void
+uip_add_rcv_nxt(u16_t n)
+{
+ uip_add32(uip_conn->rcv_nxt, n);
+ uip_conn->rcv_nxt[0] = uip_acc32[0];
+ uip_conn->rcv_nxt[1] = uip_acc32[1];
+ uip_conn->rcv_nxt[2] = uip_acc32[2];
+ uip_conn->rcv_nxt[3] = uip_acc32[3];
+}
+/*---------------------------------------------------------------------------*/
+void
+uip_process(u8_t flag)
+{
+ register struct uip_conn *uip_connr = uip_conn;
+
+#if UIP_UDP
+ if(flag == UIP_UDP_SEND_CONN) {
+ goto udp_send;
+ }
+#endif /* UIP_UDP */
+
+ uip_sappdata = uip_appdata = &uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN];
+
+ /* Check if we were invoked because of a poll request for a
+ particular connection. */
+ if(flag == UIP_POLL_REQUEST) {
+ if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED &&
+ !uip_outstanding(uip_connr)) {
+ uip_len = uip_slen = 0;
+ uip_flags = UIP_POLL;
+ UIP_APPCALL();
+ goto appsend;
+ }
+ goto drop;
+
+ /* Check if we were invoked because of the perodic timer fireing. */
+ } else if(flag == UIP_TIMER) {
+#if UIP_REASSEMBLY
+ if(uip_reasstmr != 0) {
+ --uip_reasstmr;
+ }
+#endif /* UIP_REASSEMBLY */
+ /* Increase the initial sequence number. */
+ if(++iss[3] == 0) {
+ if(++iss[2] == 0) {
+ if(++iss[1] == 0) {
+ ++iss[0];
+ }
+ }
+ }
+
+ /* Reset the length variables. */
+ uip_len = 0;
+ uip_slen = 0;
+
+ /* Check if the connection is in a state in which we simply wait
+ for the connection to time out. If so, we increase the
+ connection's timer and remove the connection if it times
+ out. */
+ if(uip_connr->tcpstateflags == UIP_TIME_WAIT ||
+ uip_connr->tcpstateflags == UIP_FIN_WAIT_2) {
+ ++(uip_connr->timer);
+ if(uip_connr->timer == UIP_TIME_WAIT_TIMEOUT) {
+ uip_connr->tcpstateflags = UIP_CLOSED;
+ }
+ } else if(uip_connr->tcpstateflags != UIP_CLOSED) {
+ /* If the connection has outstanding data, we increase the
+ connection's timer and see if it has reached the RTO value
+ in which case we retransmit. */
+ if(uip_outstanding(uip_connr)) {
+ if(uip_connr->timer-- == 0) {
+ if(uip_connr->nrtx == UIP_MAXRTX ||
+ ((uip_connr->tcpstateflags == UIP_SYN_SENT ||
+ uip_connr->tcpstateflags == UIP_SYN_RCVD) &&
+ uip_connr->nrtx == UIP_MAXSYNRTX)) {
+ uip_connr->tcpstateflags = UIP_CLOSED;
+
+ /* We call UIP_APPCALL() with uip_flags set to
+ UIP_TIMEDOUT to inform the application that the
+ connection has timed out. */
+ uip_flags = UIP_TIMEDOUT;
+ UIP_APPCALL();
+
+ /* We also send a reset packet to the remote host. */
+ BUF->flags = TCP_RST | TCP_ACK;
+ goto tcp_send_nodata;
+ }
+
+ /* Exponential backoff. */
+ uip_connr->timer = UIP_RTO << (uip_connr->nrtx > 4?
+ 4:
+ uip_connr->nrtx);
+ ++(uip_connr->nrtx);
+
+ /* Ok, so we need to retransmit. We do this differently
+ depending on which state we are in. In ESTABLISHED, we
+ call upon the application so that it may prepare the
+ data for the retransmit. In SYN_RCVD, we resend the
+ SYNACK that we sent earlier and in LAST_ACK we have to
+ retransmit our FINACK. */
+ UIP_STAT(++uip_stat.tcp.rexmit);
+ switch(uip_connr->tcpstateflags & UIP_TS_MASK) {
+ case UIP_SYN_RCVD:
+ /* In the SYN_RCVD state, we should retransmit our
+ SYNACK. */
+ goto tcp_send_synack;
+
+#if UIP_ACTIVE_OPEN
+ case UIP_SYN_SENT:
+ /* In the SYN_SENT state, we retransmit out SYN. */
+ BUF->flags = 0;
+ goto tcp_send_syn;
+#endif /* UIP_ACTIVE_OPEN */
+
+ case UIP_ESTABLISHED:
+ /* In the ESTABLISHED state, we call upon the application
+ to do the actual retransmit after which we jump into
+ the code for sending out the packet (the apprexmit
+ label). */
+ uip_flags = UIP_REXMIT;
+ UIP_APPCALL();
+ goto apprexmit;
+
+ case UIP_FIN_WAIT_1:
+ case UIP_CLOSING:
+ case UIP_LAST_ACK:
+ /* In all these states we should retransmit a FINACK. */
+ goto tcp_send_finack;
+
+ }
+ }
+ } else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED) {
+ /* If there was no need for a retransmission, we poll the
+ application for new data. */
+ uip_len = uip_slen = 0;
+ uip_flags = UIP_POLL;
+ UIP_APPCALL();
+ goto appsend;
+ }
+ }
+ goto drop;
+ }
+#if UIP_UDP
+ if(flag == UIP_UDP_TIMER) {
+ if(uip_udp_conn->lport != 0) {
+ uip_conn = NULL;
+ uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
+ uip_len = uip_slen = 0;
+ uip_flags = UIP_POLL;
+ UIP_UDP_APPCALL();
+ goto udp_send;
+ } else {
+ goto drop;
+ }
+ }
+#endif
+
+ /* This is where the input processing starts. */
+ UIP_STAT(++uip_stat.ip.recv);
+
+ /* Start of IP input header processing code. */
+
+#if UIP_CONF_IPV6
+ /* Check validity of the IP header. */
+ if((BUF->vtc & 0xf0) != 0x60) { /* IP version and header length. */
+ UIP_STAT(++uip_stat.ip.drop);
+ UIP_STAT(++uip_stat.ip.vhlerr);
+ UIP_LOG("ipv6: invalid version.");
+ goto drop;
+ }
+#else /* UIP_CONF_IPV6 */
+ /* Check validity of the IP header. */
+ if(BUF->vhl != 0x45) { /* IP version and header length. */
+ UIP_STAT(++uip_stat.ip.drop);
+ UIP_STAT(++uip_stat.ip.vhlerr);
+ UIP_LOG("ip: invalid version or header length.");
+ goto drop;
+ }
+#endif /* UIP_CONF_IPV6 */
+
+ /* Check the size of the packet. If the size reported to us in
+ uip_len is smaller the size reported in the IP header, we assume
+ that the packet has been corrupted in transit. If the size of
+ uip_len is larger than the size reported in the IP packet header,
+ the packet has been padded and we set uip_len to the correct
+ value.. */
+
+ if((BUF->len[0] << 8) + BUF->len[1] <= uip_len) {
+ uip_len = (BUF->len[0] << 8) + BUF->len[1];
+#if UIP_CONF_IPV6
+ uip_len += 40; /* The length reported in the IPv6 header is the
+ length of the payload that follows the
+ header. However, uIP uses the uip_len variable
+ for holding the size of the entire packet,
+ including the IP header. For IPv4 this is not a
+ problem as the length field in the IPv4 header
+ contains the length of the entire packet. But
+ for IPv6 we need to add the size of the IPv6
+ header (40 bytes). */
+#endif /* UIP_CONF_IPV6 */
+ } else {
+ UIP_LOG("ip: packet shorter than reported in IP header.");
+ goto drop;
+ }
+
+#if !UIP_CONF_IPV6
+ /* Check the fragment flag. */
+ if((BUF->ipoffset[0] & 0x3f) != 0 ||
+ BUF->ipoffset[1] != 0) {
+#if UIP_REASSEMBLY
+ uip_len = uip_reass();
+ if(uip_len == 0) {
+ goto drop;
+ }
+#else /* UIP_REASSEMBLY */
+ UIP_STAT(++uip_stat.ip.drop);
+ UIP_STAT(++uip_stat.ip.fragerr);
+ UIP_LOG("ip: fragment dropped.");
+ goto drop;
+#endif /* UIP_REASSEMBLY */
+ }
+#endif /* UIP_CONF_IPV6 */
+
+ if(uip_ipaddr_cmp(&uip_hostaddr, &uip_all_zeroes_addr)) {
+ /* If we are configured to use ping IP address configuration and
+ hasn't been assigned an IP address yet, we accept all ICMP
+ packets. */
+#if UIP_PINGADDRCONF && !UIP_CONF_IPV6
+ if(BUF->proto == UIP_PROTO_ICMP) {
+ UIP_LOG("ip: possible ping config packet received.");
+ goto icmp_input;
+ } else {
+ UIP_LOG("ip: packet dropped since no address assigned.");
+ goto drop;
+ }
+#endif /* UIP_PINGADDRCONF */
+
+ } else {
+ /* If IP broadcast support is configured, we check for a broadcast
+ UDP packet, which may be destined to us. */
+#if UIP_BROADCAST
+ DEBUG_PRINTF("UDP IP checksum 0x%04x\n", uip_ipchksum());
+ if(BUF->proto == UIP_PROTO_UDP &&
+ uip_ipaddr_cmp(&BUF->destipaddr, &uip_broadcast_addr)
+ /*&&
+ uip_ipchksum() == 0xffff*/) {
+ goto udp_input;
+ }
+#endif /* UIP_BROADCAST */
+
+ /* Check if the packet is destined for our IP address. */
+#if !UIP_CONF_IPV6
+ if(!uip_ipaddr_cmp(&BUF->destipaddr, &uip_hostaddr)) {
+ UIP_STAT(++uip_stat.ip.drop);
+ goto drop;
+ }
+#else /* UIP_CONF_IPV6 */
+ /* For IPv6, packet reception is a little trickier as we need to
+ make sure that we listen to certain multicast addresses (all
+ hosts multicast address, and the solicited-node multicast
+ address) as well. However, we will cheat here and accept all
+ multicast packets that are sent to the ff02::/16 addresses. */
+ if(!uip_ipaddr_cmp(&BUF->destipaddr, &uip_hostaddr) &&
+ BUF->destipaddr.u16[0] != HTONS(0xff02)) {
+ UIP_STAT(++uip_stat.ip.drop);
+ goto drop;
+ }
+#endif /* UIP_CONF_IPV6 */
+ }
+
+#if !UIP_CONF_IPV6
+ if(uip_ipchksum() != 0xffff) { /* Compute and check the IP header
+ checksum. */
+ UIP_STAT(++uip_stat.ip.drop);
+ UIP_STAT(++uip_stat.ip.chkerr);
+ UIP_LOG("ip: bad checksum.");
+ goto drop;
+ }
+#endif /* UIP_CONF_IPV6 */
+
+ if(BUF->proto == UIP_PROTO_TCP) { /* Check for TCP packet. If so,
+ proceed with TCP input
+ processing. */
+ goto tcp_input;
+ }
+
+#if UIP_UDP
+ if(BUF->proto == UIP_PROTO_UDP) {
+ goto udp_input;
+ }
+#endif /* UIP_UDP */
+
+#if !UIP_CONF_IPV6
+ /* ICMPv4 processing code follows. */
+ if(BUF->proto != UIP_PROTO_ICMP) { /* We only allow ICMP packets from
+ here. */
+ UIP_STAT(++uip_stat.ip.drop);
+ UIP_STAT(++uip_stat.ip.protoerr);
+ UIP_LOG("ip: neither tcp nor icmp.");
+ goto drop;
+ }
+
+#if UIP_PINGADDRCONF
+ icmp_input:
+#endif /* UIP_PINGADDRCONF */
+ UIP_STAT(++uip_stat.icmp.recv);
+
+ /* ICMP echo (i.e., ping) processing. This is simple, we only change
+ the ICMP type from ECHO to ECHO_REPLY and adjust the ICMP
+ checksum before we return the packet. */
+ if(ICMPBUF->type != ICMP_ECHO) {
+ UIP_STAT(++uip_stat.icmp.drop);
+ UIP_STAT(++uip_stat.icmp.typeerr);
+ UIP_LOG("icmp: not icmp echo.");
+ goto drop;
+ }
+
+ /* If we are configured to use ping IP address assignment, we use
+ the destination IP address of this ping packet and assign it to
+ ourself. */
+#if UIP_PINGADDRCONF
+ if(uip_ipaddr_cmp(&uip_hostaddr, &uip_all_zeroes_addr)) {
+ uip_hostaddr = BUF->destipaddr;
+ }
+#endif /* UIP_PINGADDRCONF */
+
+ ICMPBUF->type = ICMP_ECHO_REPLY;
+
+ if(ICMPBUF->icmpchksum >= HTONS(0xffff - (ICMP_ECHO << 8))) {
+ ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8) + 1;
+ } else {
+ ICMPBUF->icmpchksum += HTONS(ICMP_ECHO << 8);
+ }
+
+ /* Swap IP addresses. */
+ uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
+ uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
+
+ UIP_STAT(++uip_stat.icmp.sent);
+ BUF->ttl = UIP_TTL;
+ goto ip_send_nolen;
+
+ /* End of IPv4 input header processing code. */
+#else /* !UIP_CONF_IPV6 */
+
+ /* This is IPv6 ICMPv6 processing code. */
+ DEBUG_PRINTF("icmp6_input: length %d\n", uip_len);
+
+ if(BUF->proto != UIP_PROTO_ICMP6) { /* We only allow ICMPv6 packets from
+ here. */
+ UIP_STAT(++uip_stat.ip.drop);
+ UIP_STAT(++uip_stat.ip.protoerr);
+ UIP_LOG("ip: neither tcp nor icmp6.");
+ goto drop;
+ }
+
+ UIP_STAT(++uip_stat.icmp.recv);
+
+ /* If we get a neighbor solicitation for our address we should send
+ a neighbor advertisement message back. */
+ if(ICMPBUF->type == ICMP6_NEIGHBOR_SOLICITATION) {
+ if(uip_ipaddr_cmp(&ICMPBUF->icmp6data, &uip_hostaddr)) {
+
+ if(ICMPBUF->options[0] == ICMP6_OPTION_SOURCE_LINK_ADDRESS) {
+ /* Save the sender's address in our neighbor list. */
+ uip_neighbor_add(&ICMPBUF->srcipaddr, &(ICMPBUF->options[2]));
+ }
+
+ /* We should now send a neighbor advertisement back to where the
+ neighbor solicication came from. */
+ ICMPBUF->type = ICMP6_NEIGHBOR_ADVERTISEMENT;
+ ICMPBUF->flags = ICMP6_FLAG_S; /* Solicited flag. */
+
+ ICMPBUF->reserved1 = ICMPBUF->reserved2 = ICMPBUF->reserved3 = 0;
+
+ uip_ipaddr_copy(&ICMPBUF->destipaddr, &ICMPBUF->srcipaddr);
+ uip_ipaddr_copy(&ICMPBUF->srcipaddr, &uip_hostaddr);
+ ICMPBUF->options[0] = ICMP6_OPTION_TARGET_LINK_ADDRESS;
+ ICMPBUF->options[1] = 1; /* Options length, 1 = 8 bytes. */
+ memcpy(&(ICMPBUF->options[2]), &uip_ethaddr, sizeof(uip_ethaddr));
+ ICMPBUF->icmpchksum = 0;
+ ICMPBUF->icmpchksum = ~uip_icmp6chksum();
+
+ goto send;
+
+ }
+ goto drop;
+ } else if(ICMPBUF->type == ICMP6_ECHO) {
+ /* ICMP echo (i.e., ping) processing. This is simple, we only
+ change the ICMP type from ECHO to ECHO_REPLY and update the
+ ICMP checksum before we return the packet. */
+
+ ICMPBUF->type = ICMP6_ECHO_REPLY;
+
+ uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
+ uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
+ ICMPBUF->icmpchksum = 0;
+ ICMPBUF->icmpchksum = ~uip_icmp6chksum();
+
+ UIP_STAT(++uip_stat.icmp.sent);
+ goto send;
+ } else {
+ DEBUG_PRINTF("Unknown icmp6 message type %d\n", ICMPBUF->type);
+ UIP_STAT(++uip_stat.icmp.drop);
+ UIP_STAT(++uip_stat.icmp.typeerr);
+ UIP_LOG("icmp: unknown ICMP message.");
+ goto drop;
+ }
+
+ /* End of IPv6 ICMP processing. */
+
+#endif /* !UIP_CONF_IPV6 */
+
+#if UIP_UDP
+ /* UDP input processing. */
+ udp_input:
+ /* UDP processing is really just a hack. We don't do anything to the
+ UDP/IP headers, but let the UDP application do all the hard
+ work. If the application sets uip_slen, it has a packet to
+ send. */
+#if UIP_UDP_CHECKSUMS
+ uip_len = uip_len - UIP_IPUDPH_LEN;
+ uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
+ if(UDPBUF->udpchksum != 0 && uip_udpchksum() != 0xffff) {
+ UIP_STAT(++uip_stat.udp.drop);
+ UIP_STAT(++uip_stat.udp.chkerr);
+ UIP_LOG("udp: bad checksum.");
+ goto drop;
+ }
+#else /* UIP_UDP_CHECKSUMS */
+ uip_len = uip_len - UIP_IPUDPH_LEN;
+#endif /* UIP_UDP_CHECKSUMS */
+
+ /* Demultiplex this UDP packet between the UDP "connections". */
+ for(uip_udp_conn = &uip_udp_conns[0];
+ uip_udp_conn < &uip_udp_conns[UIP_UDP_CONNS];
+ ++uip_udp_conn) {
+ /* If the local UDP port is non-zero, the connection is considered
+ to be used. If so, the local port number is checked against the
+ destination port number in the received packet. If the two port
+ numbers match, the remote port number is checked if the
+ connection is bound to a remote port. Finally, if the
+ connection is bound to a remote IP address, the source IP
+ address of the packet is checked. */
+ if(uip_udp_conn->lport != 0 &&
+ UDPBUF->destport == uip_udp_conn->lport &&
+ (uip_udp_conn->rport == 0 ||
+ UDPBUF->srcport == uip_udp_conn->rport) &&
+ (uip_ipaddr_cmp(&uip_udp_conn->ripaddr, &uip_all_zeroes_addr) ||
+ uip_ipaddr_cmp(&uip_udp_conn->ripaddr, &uip_broadcast_addr) ||
+ uip_ipaddr_cmp(&BUF->srcipaddr, &uip_udp_conn->ripaddr))) {
+ goto udp_found;
+ }
+ }
+ UIP_LOG("udp: no matching connection found");
+#if UIP_CONF_ICMP_DEST_UNREACH && !UIP_CONF_IPV6
+ /* Copy fields from packet header into payload of this ICMP packet. */
+ memcpy(&(ICMPBUF->payload[0]), ICMPBUF, UIP_IPH_LEN + 8);
+
+ /* Set the ICMP type and code. */
+ ICMPBUF->type = ICMP_DEST_UNREACHABLE;
+ ICMPBUF->icode = ICMP_PORT_UNREACHABLE;
+
+ /* Calculate the ICMP checksum. */
+ ICMPBUF->icmpchksum = 0;
+ ICMPBUF->icmpchksum = ~uip_chksum((u16_t *)&(ICMPBUF->type), 36);
+
+ /* Set the IP destination address to be the source address of the
+ original packet. */
+ uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
+
+ /* Set our IP address as the source address. */
+ uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
+
+ /* The size of the ICMP destination unreachable packet is 36 + the
+ size of the IP header (20) = 56. */
+ uip_len = 36 + UIP_IPH_LEN;
+ ICMPBUF->len[0] = 0;
+ ICMPBUF->len[1] = (u8_t)uip_len;
+ ICMPBUF->ttl = UIP_TTL;
+ ICMPBUF->proto = UIP_PROTO_ICMP;
+
+ goto ip_send_nolen;
+#else /* UIP_CONF_ICMP_DEST_UNREACH */
+ goto drop;
+#endif /* UIP_CONF_ICMP_DEST_UNREACH */
+
+ udp_found:
+ uip_conn = NULL;
+ uip_flags = UIP_NEWDATA;
+ uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
+ uip_slen = 0;
+ UIP_UDP_APPCALL();
+
+ udp_send:
+ if(uip_slen == 0) {
+ goto drop;
+ }
+ uip_len = uip_slen + UIP_IPUDPH_LEN;
+
+#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 */
+
+ BUF->ttl = uip_udp_conn->ttl;
+ BUF->proto = UIP_PROTO_UDP;
+
+ UDPBUF->udplen = HTONS(uip_slen + UIP_UDPH_LEN);
+ UDPBUF->udpchksum = 0;
+
+ BUF->srcport = uip_udp_conn->lport;
+ BUF->destport = uip_udp_conn->rport;
+
+ uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
+ uip_ipaddr_copy(&BUF->destipaddr, &uip_udp_conn->ripaddr);
+
+ uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPTCPH_LEN];
+
+#if UIP_UDP_CHECKSUMS
+ /* Calculate UDP checksum. */
+ UDPBUF->udpchksum = ~(uip_udpchksum());
+ if(UDPBUF->udpchksum == 0) {
+ UDPBUF->udpchksum = 0xffff;
+ }
+#endif /* UIP_UDP_CHECKSUMS */
+
+ goto ip_send_nolen;
+#endif /* UIP_UDP */
+
+ /* TCP input processing. */
+ tcp_input:
+ UIP_STAT(++uip_stat.tcp.recv);
+
+ /* Start of TCP input header processing code. */
+
+ if(uip_tcpchksum() != 0xffff) { /* Compute and check the TCP
+ checksum. */
+ UIP_STAT(++uip_stat.tcp.drop);
+ UIP_STAT(++uip_stat.tcp.chkerr);
+ UIP_LOG("tcp: bad checksum.");
+ goto drop;
+ }
+
+ /* Demultiplex this segment. */
+ /* First check any active connections. */
+ for(uip_connr = &uip_conns[0]; uip_connr <= &uip_conns[UIP_CONNS - 1];
+ ++uip_connr) {
+ if(uip_connr->tcpstateflags != UIP_CLOSED &&
+ BUF->destport == uip_connr->lport &&
+ BUF->srcport == uip_connr->rport &&
+ uip_ipaddr_cmp(&BUF->srcipaddr, &uip_connr->ripaddr)) {
+ goto found;
+ }
+ }
+
+ /* If we didn't find and active connection that expected the packet,
+ either this packet is an old duplicate, or this is a SYN packet
+ destined for a connection in LISTEN. If the SYN flag isn't set,
+ it is an old packet and we send a RST. */
+ if((BUF->flags & TCP_CTL) != TCP_SYN) {
+ goto reset;
+ }
+
+ tmp16 = BUF->destport;
+ /* Next, check listening connections. */
+ for(c = 0; c < UIP_LISTENPORTS; ++c) {
+ if(tmp16 == uip_listenports[c]) {
+ goto found_listen;
+ }
+ }
+
+ /* No matching connection found, so we send a RST packet. */
+ UIP_STAT(++uip_stat.tcp.synrst);
+
+ reset:
+ /* We do not send resets in response to resets. */
+ if(BUF->flags & TCP_RST) {
+ goto drop;
+ }
+
+ UIP_STAT(++uip_stat.tcp.rst);
+
+ BUF->flags = TCP_RST | TCP_ACK;
+ uip_len = UIP_IPTCPH_LEN;
+ BUF->tcpoffset = 5 << 4;
+
+ /* Flip the seqno and ackno fields in the TCP header. */
+ c = BUF->seqno[3];
+ BUF->seqno[3] = BUF->ackno[3];
+ BUF->ackno[3] = c;
+
+ c = BUF->seqno[2];
+ BUF->seqno[2] = BUF->ackno[2];
+ BUF->ackno[2] = c;
+
+ c = BUF->seqno[1];
+ BUF->seqno[1] = BUF->ackno[1];
+ BUF->ackno[1] = c;
+
+ c = BUF->seqno[0];
+ BUF->seqno[0] = BUF->ackno[0];
+ BUF->ackno[0] = c;
+
+ /* We also have to increase the sequence number we are
+ acknowledging. If the least significant byte overflowed, we need
+ to propagate the carry to the other bytes as well. */
+ if(++BUF->ackno[3] == 0) {
+ if(++BUF->ackno[2] == 0) {
+ if(++BUF->ackno[1] == 0) {
+ ++BUF->ackno[0];
+ }
+ }
+ }
+
+ /* Swap port numbers. */
+ tmp16 = BUF->srcport;
+ BUF->srcport = BUF->destport;
+ BUF->destport = tmp16;
+
+ /* Swap IP addresses. */
+ uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr);
+ uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
+
+ /* And send out the RST packet! */
+ goto tcp_send_noconn;
+
+ /* This label will be jumped to if we matched the incoming packet
+ with a connection in LISTEN. In that case, we should create a new
+ connection and send a SYNACK in return. */
+ found_listen:
+ /* First we check if there are any connections avaliable. Unused
+ connections are kept in the same table as used connections, but
+ unused ones have the tcpstate set to CLOSED. Also, connections in
+ TIME_WAIT are kept track of and we'll use the oldest one if no
+ CLOSED connections are found. Thanks to Eddie C. Dost for a very
+ nice algorithm for the TIME_WAIT search. */
+ uip_connr = 0;
+ for(c = 0; c < UIP_CONNS; ++c) {
+ if(uip_conns[c].tcpstateflags == UIP_CLOSED) {
+ uip_connr = &uip_conns[c];
+ break;
+ }
+ if(uip_conns[c].tcpstateflags == UIP_TIME_WAIT) {
+ if(uip_connr == 0 ||
+ uip_conns[c].timer > uip_connr->timer) {
+ uip_connr = &uip_conns[c];
+ }
+ }
+ }
+
+ if(uip_connr == 0) {
+ /* All connections are used already, we drop packet and hope that
+ the remote end will retransmit the packet at a time when we
+ have more spare connections. */
+ UIP_STAT(++uip_stat.tcp.syndrop);
+ UIP_LOG("tcp: found no unused connections.");
+ goto drop;
+ }
+ uip_conn = uip_connr;
+
+ /* Fill in the necessary fields for the new connection. */
+ uip_connr->rto = uip_connr->timer = UIP_RTO;
+ uip_connr->sa = 0;
+ uip_connr->sv = 4;
+ uip_connr->nrtx = 0;
+ uip_connr->lport = BUF->destport;
+ uip_connr->rport = BUF->srcport;
+ uip_ipaddr_copy(&uip_connr->ripaddr, &BUF->srcipaddr);
+ uip_connr->tcpstateflags = UIP_SYN_RCVD;
+
+ uip_connr->snd_nxt[0] = iss[0];
+ uip_connr->snd_nxt[1] = iss[1];
+ uip_connr->snd_nxt[2] = iss[2];
+ uip_connr->snd_nxt[3] = iss[3];
+ uip_connr->len = 1;
+
+ /* rcv_nxt should be the seqno from the incoming packet + 1. */
+ uip_connr->rcv_nxt[3] = BUF->seqno[3];
+ uip_connr->rcv_nxt[2] = BUF->seqno[2];
+ uip_connr->rcv_nxt[1] = BUF->seqno[1];
+ uip_connr->rcv_nxt[0] = BUF->seqno[0];
+ uip_add_rcv_nxt(1);
+
+ /* Parse the TCP MSS option, if present. */
+ if((BUF->tcpoffset & 0xf0) > 0x50) {
+ for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
+ opt = uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + c];
+ if(opt == TCP_OPT_END) {
+ /* End of options. */
+ break;
+ } else if(opt == TCP_OPT_NOOP) {
+ ++c;
+ /* NOP option. */
+ } else if(opt == TCP_OPT_MSS &&
+ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
+ /* An MSS option with the right option length. */
+ tmp16 = ((u16_t)uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
+ (u16_t)uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + 3 + c];
+ uip_connr->initialmss = uip_connr->mss =
+ tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
+
+ /* And we are done processing options. */
+ break;
+ } else {
+ /* All other options have a length field, so that we easily
+ can skip past them. */
+ if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
+ /* If the length field is zero, the options are malformed
+ and we don't process them further. */
+ break;
+ }
+ c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
+ }
+ }
+ }
+
+ /* Our response will be a SYNACK. */
+#if UIP_ACTIVE_OPEN
+ tcp_send_synack:
+ BUF->flags = TCP_ACK;
+
+ tcp_send_syn:
+ BUF->flags |= TCP_SYN;
+#else /* UIP_ACTIVE_OPEN */
+ tcp_send_synack:
+ BUF->flags = TCP_SYN | TCP_ACK;
+#endif /* UIP_ACTIVE_OPEN */
+
+ /* We send out the TCP Maximum Segment Size option with our
+ SYNACK. */
+ BUF->optdata[0] = TCP_OPT_MSS;
+ BUF->optdata[1] = TCP_OPT_MSS_LEN;
+ BUF->optdata[2] = (UIP_TCP_MSS) / 256;
+ BUF->optdata[3] = (UIP_TCP_MSS) & 255;
+ uip_len = UIP_IPTCPH_LEN + TCP_OPT_MSS_LEN;
+ BUF->tcpoffset = ((UIP_TCPH_LEN + TCP_OPT_MSS_LEN) / 4) << 4;
+ goto tcp_send;
+
+ /* This label will be jumped to if we found an active connection. */
+ found:
+ uip_conn = uip_connr;
+ uip_flags = 0;
+ /* We do a very naive form of TCP reset processing; we just accept
+ any RST and kill our connection. We should in fact check if the
+ sequence number of this reset is wihtin our advertised window
+ before we accept the reset. */
+ if(BUF->flags & TCP_RST) {
+ uip_connr->tcpstateflags = UIP_CLOSED;
+ UIP_LOG("tcp: got reset, aborting connection.");
+ uip_flags = UIP_ABORT;
+ UIP_APPCALL();
+ goto drop;
+ }
+ /* Calculate the length of the data, if the application has sent
+ any data to us. */
+ c = (BUF->tcpoffset >> 4) << 2;
+ /* uip_len will contain the length of the actual TCP data. This is
+ calculated by subtracing the length of the TCP header (in
+ c) and the length of the IP header (20 bytes). */
+ uip_len = uip_len - c - UIP_IPH_LEN;
+
+ /* First, check if the sequence number of the incoming packet is
+ what we're expecting next. If not, we send out an ACK with the
+ correct numbers in. */
+ if(!(((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_SENT) &&
+ ((BUF->flags & TCP_CTL) == (TCP_SYN | TCP_ACK)))) {
+ if((uip_len > 0 || ((BUF->flags & (TCP_SYN | TCP_FIN)) != 0)) &&
+ (BUF->seqno[0] != uip_connr->rcv_nxt[0] ||
+ BUF->seqno[1] != uip_connr->rcv_nxt[1] ||
+ BUF->seqno[2] != uip_connr->rcv_nxt[2] ||
+ BUF->seqno[3] != uip_connr->rcv_nxt[3])) {
+ goto tcp_send_ack;
+ }
+ }
+
+ /* Next, check if the incoming segment acknowledges any outstanding
+ data. If so, we update the sequence number, reset the length of
+ the outstanding data, calculate RTT estimations, and reset the
+ retransmission timer. */
+ if((BUF->flags & TCP_ACK) && uip_outstanding(uip_connr)) {
+ uip_add32(uip_connr->snd_nxt, uip_connr->len);
+
+ if(BUF->ackno[0] == uip_acc32[0] &&
+ BUF->ackno[1] == uip_acc32[1] &&
+ BUF->ackno[2] == uip_acc32[2] &&
+ BUF->ackno[3] == uip_acc32[3]) {
+ /* Update sequence number. */
+ uip_connr->snd_nxt[0] = uip_acc32[0];
+ uip_connr->snd_nxt[1] = uip_acc32[1];
+ uip_connr->snd_nxt[2] = uip_acc32[2];
+ uip_connr->snd_nxt[3] = uip_acc32[3];
+
+ /* Do RTT estimation, unless we have done retransmissions. */
+ if(uip_connr->nrtx == 0) {
+ signed char m;
+ m = uip_connr->rto - uip_connr->timer;
+ /* This is taken directly from VJs original code in his paper */
+ m = m - (uip_connr->sa >> 3);
+ uip_connr->sa += m;
+ if(m < 0) {
+ m = -m;
+ }
+ m = m - (uip_connr->sv >> 2);
+ uip_connr->sv += m;
+ uip_connr->rto = (uip_connr->sa >> 3) + uip_connr->sv;
+
+ }
+ /* Set the acknowledged flag. */
+ uip_flags = UIP_ACKDATA;
+ /* Reset the retransmission timer. */
+ uip_connr->timer = uip_connr->rto;
+
+ /* Reset length of outstanding data. */
+ uip_connr->len = 0;
+ }
+
+ }
+
+ /* Do different things depending on in what state the connection is. */
+ switch(uip_connr->tcpstateflags & UIP_TS_MASK) {
+ /* CLOSED and LISTEN are not handled here. CLOSE_WAIT is not
+ implemented, since we force the application to close when the
+ peer sends a FIN (hence the application goes directly from
+ ESTABLISHED to LAST_ACK). */
+ case UIP_SYN_RCVD:
+ /* In SYN_RCVD we have sent out a SYNACK in response to a SYN, and
+ we are waiting for an ACK that acknowledges the data we sent
+ out the last time. Therefore, we want to have the UIP_ACKDATA
+ flag set. If so, we enter the ESTABLISHED state. */
+ if(uip_flags & UIP_ACKDATA) {
+ uip_connr->tcpstateflags = UIP_ESTABLISHED;
+ uip_flags = UIP_CONNECTED;
+ uip_connr->len = 0;
+ if(uip_len > 0) {
+ uip_flags |= UIP_NEWDATA;
+ uip_add_rcv_nxt(uip_len);
+ }
+ uip_slen = 0;
+ UIP_APPCALL();
+ goto appsend;
+ }
+ goto drop;
+#if UIP_ACTIVE_OPEN
+ case UIP_SYN_SENT:
+ /* In SYN_SENT, we wait for a SYNACK that is sent in response to
+ our SYN. The rcv_nxt is set to sequence number in the SYNACK
+ plus one, and we send an ACK. We move into the ESTABLISHED
+ state. */
+ if((uip_flags & UIP_ACKDATA) &&
+ (BUF->flags & TCP_CTL) == (TCP_SYN | TCP_ACK)) {
+
+ /* Parse the TCP MSS option, if present. */
+ if((BUF->tcpoffset & 0xf0) > 0x50) {
+ for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) {
+ opt = uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + c];
+ if(opt == TCP_OPT_END) {
+ /* End of options. */
+ break;
+ } else if(opt == TCP_OPT_NOOP) {
+ ++c;
+ /* NOP option. */
+ } else if(opt == TCP_OPT_MSS &&
+ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
+ /* An MSS option with the right option length. */
+ tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
+ uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c];
+ uip_connr->initialmss =
+ uip_connr->mss = tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
+
+ /* And we are done processing options. */
+ break;
+ } else {
+ /* All other options have a length field, so that we easily
+ can skip past them. */
+ if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
+ /* If the length field is zero, the options are malformed
+ and we don't process them further. */
+ break;
+ }
+ c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
+ }
+ }
+ }
+ uip_connr->tcpstateflags = UIP_ESTABLISHED;
+ uip_connr->rcv_nxt[0] = BUF->seqno[0];
+ uip_connr->rcv_nxt[1] = BUF->seqno[1];
+ uip_connr->rcv_nxt[2] = BUF->seqno[2];
+ uip_connr->rcv_nxt[3] = BUF->seqno[3];
+ uip_add_rcv_nxt(1);
+ uip_flags = UIP_CONNECTED | UIP_NEWDATA;
+ uip_connr->len = 0;
+ uip_len = 0;
+ uip_slen = 0;
+ UIP_APPCALL();
+ goto appsend;
+ }
+ /* Inform the application that the connection failed */
+ uip_flags = UIP_ABORT;
+ UIP_APPCALL();
+ /* The connection is closed after we send the RST */
+ uip_conn->tcpstateflags = UIP_CLOSED;
+ goto reset;
+#endif /* UIP_ACTIVE_OPEN */
+
+ case UIP_ESTABLISHED:
+ /* In the ESTABLISHED state, we call upon the application to feed
+ data into the uip_buf. If the UIP_ACKDATA flag is set, the
+ application should put new data into the buffer, otherwise we are
+ retransmitting an old segment, and the application should put that
+ data into the buffer.
+
+ If the incoming packet is a FIN, we should close the connection on
+ this side as well, and we send out a FIN and enter the LAST_ACK
+ state. We require that there is no outstanding data; otherwise the
+ sequence numbers will be screwed up. */
+
+ if(BUF->flags & TCP_FIN && !(uip_connr->tcpstateflags & UIP_STOPPED)) {
+ if(uip_outstanding(uip_connr)) {
+ goto drop;
+ }
+ uip_add_rcv_nxt(1 + uip_len);
+ uip_flags |= UIP_CLOSE;
+ if(uip_len > 0) {
+ uip_flags |= UIP_NEWDATA;
+ }
+ UIP_APPCALL();
+ uip_connr->len = 1;
+ uip_connr->tcpstateflags = UIP_LAST_ACK;
+ uip_connr->nrtx = 0;
+ tcp_send_finack:
+ BUF->flags = TCP_FIN | TCP_ACK;
+ goto tcp_send_nodata;
+ }
+
+ /* Check the URG flag. If this is set, the segment carries urgent
+ data that we must pass to the application. */
+ if((BUF->flags & TCP_URG) != 0) {
+#if UIP_URGDATA > 0
+ uip_urglen = (BUF->urgp[0] << 8) | BUF->urgp[1];
+ if(uip_urglen > uip_len) {
+ /* There is more urgent data in the next segment to come. */
+ uip_urglen = uip_len;
+ }
+ uip_add_rcv_nxt(uip_urglen);
+ uip_len -= uip_urglen;
+ uip_urgdata = uip_appdata;
+ uip_appdata += uip_urglen;
+ } else {
+ uip_urglen = 0;
+#else /* UIP_URGDATA > 0 */
+ uip_appdata = ((char *)uip_appdata) + ((BUF->urgp[0] << 8) | BUF->urgp[1]);
+ uip_len -= (BUF->urgp[0] << 8) | BUF->urgp[1];
+#endif /* UIP_URGDATA > 0 */
+ }
+
+ /* If uip_len > 0 we have TCP data in the packet, and we flag this
+ by setting the UIP_NEWDATA flag and update the sequence number
+ we acknowledge. If the application has stopped the dataflow
+ using uip_stop(), we must not accept any data packets from the
+ remote host. */
+ if(uip_len > 0 && !(uip_connr->tcpstateflags & UIP_STOPPED)) {
+ uip_flags |= UIP_NEWDATA;
+ uip_add_rcv_nxt(uip_len);
+ }
+
+ /* Check if the available buffer space advertised by the other end
+ is smaller than the initial MSS for this connection. If so, we
+ set the current MSS to the window size to ensure that the
+ application does not send more data than the other end can
+ handle.
+
+ If the remote host advertises a zero window, we set the MSS to
+ the initial MSS so that the application will send an entire MSS
+ of data. This data will not be acknowledged by the receiver,
+ and the application will retransmit it. This is called the
+ "persistent timer" and uses the retransmission mechanim.
+ */
+ tmp16 = ((u16_t)BUF->wnd[0] << 8) + (u16_t)BUF->wnd[1];
+ if(tmp16 > uip_connr->initialmss ||
+ tmp16 == 0) {
+ tmp16 = uip_connr->initialmss;
+ }
+ uip_connr->mss = tmp16;
+
+ /* If this packet constitutes an ACK for outstanding data (flagged
+ by the UIP_ACKDATA flag, we should call the application since it
+ might want to send more data. If the incoming packet had data
+ from the peer (as flagged by the UIP_NEWDATA flag), the
+ application must also be notified.
+
+ When the application is called, the global variable uip_len
+ contains the length of the incoming data. The application can
+ access the incoming data through the global pointer
+ uip_appdata, which usually points UIP_IPTCPH_LEN + UIP_LLH_LEN
+ bytes into the uip_buf array.
+
+ If the application wishes to send any data, this data should be
+ put into the uip_appdata and the length of the data should be
+ put into uip_len. If the application don't have any data to
+ send, uip_len must be set to 0. */
+ if(uip_flags & (UIP_NEWDATA | UIP_ACKDATA)) {
+ uip_slen = 0;
+ UIP_APPCALL();
+
+ appsend:
+
+ if(uip_flags & UIP_ABORT) {
+ uip_slen = 0;
+ uip_connr->tcpstateflags = UIP_CLOSED;
+ BUF->flags = TCP_RST | TCP_ACK;
+ goto tcp_send_nodata;
+ }
+
+ if(uip_flags & UIP_CLOSE) {
+ uip_slen = 0;
+ uip_connr->len = 1;
+ uip_connr->tcpstateflags = UIP_FIN_WAIT_1;
+ uip_connr->nrtx = 0;
+ BUF->flags = TCP_FIN | TCP_ACK;
+ goto tcp_send_nodata;
+ }
+
+ /* If uip_slen > 0, the application has data to be sent. */
+ if(uip_slen > 0) {
+
+ /* If the connection has acknowledged data, the contents of
+ the ->len variable should be discarded. */
+ if((uip_flags & UIP_ACKDATA) != 0) {
+ uip_connr->len = 0;
+ }
+
+ /* If the ->len variable is non-zero the connection has
+ already data in transit and cannot send anymore right
+ now. */
+ if(uip_connr->len == 0) {
+
+ /* The application cannot send more than what is allowed by
+ the mss (the minumum of the MSS and the available
+ window). */
+ if(uip_slen > uip_connr->mss) {
+ uip_slen = uip_connr->mss;
+ }
+
+ /* Remember how much data we send out now so that we know
+ when everything has been acknowledged. */
+ uip_connr->len = uip_slen;
+ } else {
+
+ /* If the application already had unacknowledged data, we
+ make sure that the application does not send (i.e.,
+ retransmit) out more than it previously sent out. */
+ uip_slen = uip_connr->len;
+ }
+ }
+ uip_connr->nrtx = 0;
+ apprexmit:
+ uip_appdata = uip_sappdata;
+
+ /* If the application has data to be sent, or if the incoming
+ packet had new data in it, we must send out a packet. */
+ if(uip_slen > 0 && uip_connr->len > 0) {
+ /* Add the length of the IP and TCP headers. */
+ uip_len = uip_connr->len + UIP_TCPIP_HLEN;
+ /* We always set the ACK flag in response packets. */
+ BUF->flags = TCP_ACK | TCP_PSH;
+ /* Send the packet. */
+ goto tcp_send_noopts;
+ }
+ /* If there is no data to send, just send out a pure ACK if
+ there is newdata. */
+ if(uip_flags & UIP_NEWDATA) {
+ uip_len = UIP_TCPIP_HLEN;
+ BUF->flags = TCP_ACK;
+ goto tcp_send_noopts;
+ }
+ }
+ goto drop;
+ case UIP_LAST_ACK:
+ /* We can close this connection if the peer has acknowledged our
+ FIN. This is indicated by the UIP_ACKDATA flag. */
+ if(uip_flags & UIP_ACKDATA) {
+ uip_connr->tcpstateflags = UIP_CLOSED;
+ uip_flags = UIP_CLOSE;
+ UIP_APPCALL();
+ }
+ break;
+
+ case UIP_FIN_WAIT_1:
+ /* The application has closed the connection, but the remote host
+ hasn't closed its end yet. Thus we do nothing but wait for a
+ FIN from the other side. */
+ if(uip_len > 0) {
+ uip_add_rcv_nxt(uip_len);
+ }
+ if(BUF->flags & TCP_FIN) {
+ if(uip_flags & UIP_ACKDATA) {
+ uip_connr->tcpstateflags = UIP_TIME_WAIT;
+ uip_connr->timer = 0;
+ uip_connr->len = 0;
+ } else {
+ uip_connr->tcpstateflags = UIP_CLOSING;
+ }
+ uip_add_rcv_nxt(1);
+ uip_flags = UIP_CLOSE;
+ UIP_APPCALL();
+ goto tcp_send_ack;
+ } else if(uip_flags & UIP_ACKDATA) {
+ uip_connr->tcpstateflags = UIP_FIN_WAIT_2;
+ uip_connr->len = 0;
+ goto drop;
+ }
+ if(uip_len > 0) {
+ goto tcp_send_ack;
+ }
+ goto drop;
+
+ case UIP_FIN_WAIT_2:
+ if(uip_len > 0) {
+ uip_add_rcv_nxt(uip_len);
+ }
+ if(BUF->flags & TCP_FIN) {
+ uip_connr->tcpstateflags = UIP_TIME_WAIT;
+ uip_connr->timer = 0;
+ uip_add_rcv_nxt(1);
+ uip_flags = UIP_CLOSE;
+ UIP_APPCALL();
+ goto tcp_send_ack;
+ }
+ if(uip_len > 0) {
+ goto tcp_send_ack;
+ }
+ goto drop;
+
+ case UIP_TIME_WAIT:
+ goto tcp_send_ack;
+
+ case UIP_CLOSING:
+ if(uip_flags & UIP_ACKDATA) {
+ uip_connr->tcpstateflags = UIP_TIME_WAIT;
+ uip_connr->timer = 0;
+ }
+ }
+ goto drop;
+
+ /* We jump here when we are ready to send the packet, and just want
+ to set the appropriate TCP sequence numbers in the TCP header. */
+ tcp_send_ack:
+ BUF->flags = TCP_ACK;
+
+ tcp_send_nodata:
+ uip_len = UIP_IPTCPH_LEN;
+
+ tcp_send_noopts:
+ BUF->tcpoffset = (UIP_TCPH_LEN / 4) << 4;
+
+ /* We're done with the input processing. We are now ready to send a
+ reply. Our job is to fill in all the fields of the TCP and IP
+ headers before calculating the checksum and finally send the
+ packet. */
+ tcp_send:
+ BUF->ackno[0] = uip_connr->rcv_nxt[0];
+ BUF->ackno[1] = uip_connr->rcv_nxt[1];
+ BUF->ackno[2] = uip_connr->rcv_nxt[2];
+ BUF->ackno[3] = uip_connr->rcv_nxt[3];
+
+ BUF->seqno[0] = uip_connr->snd_nxt[0];
+ BUF->seqno[1] = uip_connr->snd_nxt[1];
+ BUF->seqno[2] = uip_connr->snd_nxt[2];
+ BUF->seqno[3] = uip_connr->snd_nxt[3];
+
+ BUF->proto = UIP_PROTO_TCP;
+
+ BUF->srcport = uip_connr->lport;
+ BUF->destport = uip_connr->rport;
+
+ uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr);
+ uip_ipaddr_copy(&BUF->destipaddr, &uip_connr->ripaddr);
+
+ if(uip_connr->tcpstateflags & UIP_STOPPED) {
+ /* If the connection has issued uip_stop(), we advertise a zero
+ window so that the remote host will stop sending data. */
+ BUF->wnd[0] = BUF->wnd[1] = 0;
+ } else {
+ BUF->wnd[0] = ((UIP_RECEIVE_WINDOW) >> 8);
+ BUF->wnd[1] = ((UIP_RECEIVE_WINDOW) & 0xff);
+ }
+
+ tcp_send_noconn:
+ BUF->ttl = UIP_TTL;
+#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 */
+
+ BUF->urgp[0] = BUF->urgp[1] = 0;
+
+ /* Calculate TCP checksum. */
+ BUF->tcpchksum = 0;
+ BUF->tcpchksum = ~(uip_tcpchksum());
+
+ ip_send_nolen:
+#if UIP_CONF_IPV6
+ BUF->vtc = 0x60;
+ BUF->tcflow = 0x00;
+ BUF->flow = 0x00;
+#else /* UIP_CONF_IPV6 */
+ BUF->vhl = 0x45;
+ BUF->tos = 0;
+ BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
+ ++ipid;
+ BUF->ipid[0] = ipid >> 8;
+ BUF->ipid[1] = ipid & 0xff;
+ /* Calculate IP checksum. */
+ BUF->ipchksum = 0;
+ BUF->ipchksum = ~(uip_ipchksum());
+ DEBUG_PRINTF("uip ip_send_nolen: chkecum 0x%04x\n", uip_ipchksum());
+#endif /* UIP_CONF_IPV6 */
+ UIP_STAT(++uip_stat.tcp.sent);
+#if UIP_CONF_IPV6
+ send:
+#endif /* UIP_CONF_IPV6 */
+ DEBUG_PRINTF("Sending packet with length %d (%d)\n", uip_len,
+ (BUF->len[0] << 8) | BUF->len[1]);
+
+ UIP_STAT(++uip_stat.ip.sent);
+ /* Return and let the caller do the actual transmission. */
+ uip_flags = 0;
+ return;
+
+ drop:
+ uip_len = 0;
+ uip_flags = 0;
+ return;
+}
+/*---------------------------------------------------------------------------*/
+u16_t
+htons(u16_t val)
+{
+ return HTONS(val);
+}
+
+u32_t
+htonl(u32_t val)
+{
+ return HTONL(val);
+}
+/*---------------------------------------------------------------------------*/
+void
+uip_send(const void *data, int len)
+{
+ int copylen;
+#define MIN(a,b) ((a) < (b)? (a): (b))
+ copylen = MIN(len, UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN -
+ (int)((char *)uip_sappdata - (char *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN]));
+ if(copylen > 0) {
+ uip_slen = copylen;
+ if(data != uip_sappdata) {
+ memcpy(uip_sappdata, (data), uip_slen);
+ }
+ }
+}
+/*---------------------------------------------------------------------------*/
+/** @} */
+#endif /* UIP_CONF_IPV6 */
diff --git a/Projects/Webserver/Lib/uip/uip.h b/Projects/Webserver/Lib/uip/uip.h
index 3e8504c49..a10699dc1 100644
--- a/Projects/Webserver/Lib/uip/uip.h
+++ b/Projects/Webserver/Lib/uip/uip.h
@@ -1,2129 +1,2129 @@
-
-/**
- * \addtogroup uip
- * @{
- */
-
-/**
- * \file
- * Header file for the uIP TCP/IP stack.
- * \author Adam Dunkels <adam@dunkels.com>
- * \author Julien Abeille <jabeille@cisco.com> (IPv6 related code)
- * \author Mathilde Durvy <mdurvy@cisco.com> (IPv6 related code)
- *
- * The uIP TCP/IP stack header file contains definitions for a number
- * of C macros that are used by uIP programs as well as internal uIP
- * structures, TCP/IP header structures and function declarations.
- *
- */
-
-/*
- * 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.h,v 1.24 2009/04/06 13:18:50 nvt-se Exp $
- *
- */
-
-#ifndef __UIP_H__
-#define __UIP_H__
-
-#include "uipopt.h"
-
-/**
- * Representation of an IP address.
- *
- */
-#if UIP_CONF_IPV6
-typedef union uip_ip6addr_t {
- u8_t u8[16]; /* Initializer, must come first!!! */
- u16_t u16[8];
-} uip_ip6addr_t;
-
-typedef uip_ip6addr_t uip_ipaddr_t;
-#else /* UIP_CONF_IPV6 */
-typedef union uip_ip4addr_t {
- u8_t u8[4]; /* Initializer, must come first!!! */
- u16_t u16[2];
-#if 0
- u32_t u32;
-#endif
-} uip_ip4addr_t;
-typedef uip_ip4addr_t uip_ipaddr_t;
-#endif /* UIP_CONF_IPV6 */
-
-
-/*---------------------------------------------------------------------------*/
-
-/** \brief 16 bit 802.15.4 address */
-struct uip_802154_shortaddr {
- u8_t addr[2];
-};
-/** \brief 64 bit 802.15.4 address */
-struct uip_802154_longaddr {
- u8_t addr[8];
-};
-
-/** \brief 802.11 address */
-struct uip_80211_addr {
- u8_t addr[6];
-};
-
-/** \brief 802.3 address */
-struct uip_eth_addr {
- u8_t addr[6];
-};
-
-#if UIP_CONF_LL_802154
-/** \brief 802.15.4 address */
-typedef struct uip_802154_longaddr uip_lladdr_t;
-#define UIP_802154_SHORTADDR_LEN 2
-#define UIP_802154_LONGADDR_LEN 8
-#define UIP_LLADDR_LEN UIP_802154_LONGADDR_LEN
-#else /*UIP_CONF_LL_802154*/
-#if UIP_CONF_LL_80211
-/** \brief 802.11 address */
-typedef struct uip_80211_addr uip_lladdr_t;
-#define UIP_LLADDR_LEN 6
-#else /*UIP_CONF_LL_80211*/
-/** \brief Ethernet address */
-typedef struct uip_eth_addr uip_lladdr_t;
-#define UIP_LLADDR_LEN 6
-#endif /*UIP_CONF_LL_80211*/
-#endif /*UIP_CONF_LL_802154*/
-
-/*---------------------------------------------------------------------------*/
-/* First, the functions that should be called from the
- * system. Initialization, the periodic timer, and incoming packets are
- * handled by the following three functions.
- */
-/**
- * \defgroup uipconffunc uIP configuration functions
- * @{
- *
- * The uIP configuration functions are used for setting run-time
- * parameters in uIP such as IP addresses.
- */
-
-/**
- * Set the IP address of this host.
- *
- * The IP address is represented as a 4-byte array where the first
- * octet of the IP address is put in the first member of the 4-byte
- * array.
- *
- * Example:
- \code
-
- uip_ipaddr_t addr;
-
- uip_ipaddr(&addr, 192,168,1,2);
- uip_sethostaddr(&addr);
-
- \endcode
- * \param addr A pointer to an IP address of type uip_ipaddr_t;
- *
- * \sa uip_ipaddr()
- *
- * \hideinitializer
- */
-#define uip_sethostaddr(addr) uip_ipaddr_copy(&uip_hostaddr, (addr))
-
-/**
- * Get the IP address of this host.
- *
- * The IP address is represented as a 4-byte array where the first
- * octet of the IP address is put in the first member of the 4-byte
- * array.
- *
- * Example:
- \code
- uip_ipaddr_t hostaddr;
-
- uip_gethostaddr(&hostaddr);
- \endcode
- * \param addr A pointer to a uip_ipaddr_t variable that will be
- * filled in with the currently configured IP address.
- *
- * \hideinitializer
- */
-#define uip_gethostaddr(addr) uip_ipaddr_copy((addr), &uip_hostaddr)
-
-/**
- * Set the default router's IP address.
- *
- * \param addr A pointer to a uip_ipaddr_t variable containing the IP
- * address of the default router.
- *
- * \sa uip_ipaddr()
- *
- * \hideinitializer
- */
-#define uip_setdraddr(addr) uip_ipaddr_copy(&uip_draddr, (addr))
-
-/**
- * Set the netmask.
- *
- * \param addr A pointer to a uip_ipaddr_t variable containing the IP
- * address of the netmask.
- *
- * \sa uip_ipaddr()
- *
- * \hideinitializer
- */
-#define uip_setnetmask(addr) uip_ipaddr_copy(&uip_netmask, (addr))
-
-
-/**
- * Get the default router's IP address.
- *
- * \param addr A pointer to a uip_ipaddr_t variable that will be
- * filled in with the IP address of the default router.
- *
- * \hideinitializer
- */
-#define uip_getdraddr(addr) uip_ipaddr_copy((addr), &uip_draddr)
-
-/**
- * Get the netmask.
- *
- * \param addr A pointer to a uip_ipaddr_t variable that will be
- * filled in with the value of the netmask.
- *
- * \hideinitializer
- */
-#define uip_getnetmask(addr) uip_ipaddr_copy((addr), &uip_netmask)
-
-/** @} */
-
-/**
- * \defgroup uipinit uIP initialization functions
- * @{
- *
- * The uIP initialization functions are used for booting uIP.
- */
-
-/**
- * uIP initialization function.
- *
- * This function should be called at boot up to initilize the uIP
- * TCP/IP stack.
- */
-void uip_init(void);
-
-/**
- * uIP initialization function.
- *
- * This function may be used at boot time to set the initial ip_id.
- */
-void uip_setipid(u16_t id);
-
-/** @} */
-
-/**
- * \defgroup uipdevfunc uIP device driver functions
- * @{
- *
- * These functions are used by a network device driver for interacting
- * with uIP.
- */
-
-/**
- * Process an incoming packet.
- *
- * This function should be called when the device driver has received
- * a packet from the network. The packet from the device driver must
- * be present in the uip_buf buffer, and the length of the packet
- * should be placed in the uip_len variable.
- *
- * When the function returns, there may be an outbound packet placed
- * in the uip_buf packet buffer. If so, the uip_len variable is set to
- * the length of the packet. If no packet is to be sent out, the
- * uip_len variable is set to 0.
- *
- * The usual way of calling the function is presented by the source
- * code below.
- \code
- uip_len = devicedriver_poll();
- if(uip_len > 0) {
- uip_input();
- if(uip_len > 0) {
- devicedriver_send();
- }
- }
- \endcode
- *
- * \note If you are writing a uIP device driver that needs ARP
- * (Address Resolution Protocol), e.g., when running uIP over
- * Ethernet, you will need to call the uIP ARP code before calling
- * this function:
- \code
- #define BUF ((struct uip_eth_hdr *)&uip_buf[0])
- uip_len = ethernet_devicedrver_poll();
- if(uip_len > 0) {
- if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
- uip_arp_ipin();
- uip_input();
- if(uip_len > 0) {
- uip_arp_out();
- ethernet_devicedriver_send();
- }
- } else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
- uip_arp_arpin();
- if(uip_len > 0) {
- ethernet_devicedriver_send();
- }
- }
- \endcode
- *
- * \hideinitializer
- */
-#define uip_input() uip_process(UIP_DATA)
-
-
-/**
- * Periodic processing for a connection identified by its number.
- *
- * This function does the necessary periodic processing (timers,
- * polling) for a uIP TCP conneciton, and should be called when the
- * periodic uIP timer goes off. It should be called for every
- * connection, regardless of whether they are open of closed.
- *
- * When the function returns, it may have an outbound packet waiting
- * for service in the uIP packet buffer, and if so the uip_len
- * variable is set to a value larger than zero. The device driver
- * should be called to send out the packet.
- *
- * The usual way of calling the function is through a for() loop like
- * this:
- \code
- for(i = 0; i < UIP_CONNS; ++i) {
- uip_periodic(i);
- if(uip_len > 0) {
- devicedriver_send();
- }
- }
- \endcode
- *
- * \note If you are writing a uIP device driver that needs ARP
- * (Address Resolution Protocol), e.g., when running uIP over
- * Ethernet, you will need to call the uip_arp_out() function before
- * calling the device driver:
- \code
- for(i = 0; i < UIP_CONNS; ++i) {
- uip_periodic(i);
- if(uip_len > 0) {
- uip_arp_out();
- ethernet_devicedriver_send();
- }
- }
- \endcode
- *
- * \param conn The number of the connection which is to be periodically polled.
- *
- * \hideinitializer
- */
-#if UIP_TCP
-#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \
- uip_process(UIP_TIMER); } while (0)
-
-/**
- *
- *
- */
-#define uip_conn_active(conn) (uip_conns[conn].tcpstateflags != UIP_CLOSED)
-
-/**
- * Perform periodic processing for a connection identified by a pointer
- * to its structure.
- *
- * Same as uip_periodic() but takes a pointer to the actual uip_conn
- * struct instead of an integer as its argument. This function can be
- * used to force periodic processing of a specific connection.
- *
- * \param conn A pointer to the uip_conn struct for the connection to
- * be processed.
- *
- * \hideinitializer
- */
-#define uip_periodic_conn(conn) do { uip_conn = conn; \
- uip_process(UIP_TIMER); } while (0)
-
-/**
- * Request that a particular connection should be polled.
- *
- * Similar to uip_periodic_conn() but does not perform any timer
- * processing. The application is polled for new data.
- *
- * \param conn A pointer to the uip_conn struct for the connection to
- * be processed.
- *
- * \hideinitializer
- */
-#define uip_poll_conn(conn) do { uip_conn = conn; \
- uip_process(UIP_POLL_REQUEST); } while (0)
-
-#endif /* UIP_TCP */
-
-#if UIP_UDP
-/**
- * Periodic processing for a UDP connection identified by its number.
- *
- * This function is essentially the same as uip_periodic(), but for
- * UDP connections. It is called in a similar fashion as the
- * uip_periodic() function:
- \code
- for(i = 0; i < UIP_UDP_CONNS; i++) {
- uip_udp_periodic(i);
- if(uip_len > 0) {
- devicedriver_send();
- }
- }
- \endcode
- *
- * \note As for the uip_periodic() function, special care has to be
- * taken when using uIP together with ARP and Ethernet:
- \code
- for(i = 0; i < UIP_UDP_CONNS; i++) {
- uip_udp_periodic(i);
- if(uip_len > 0) {
- uip_arp_out();
- ethernet_devicedriver_send();
- }
- }
- \endcode
- *
- * \param conn The number of the UDP connection to be processed.
- *
- * \hideinitializer
- */
-#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \
- uip_process(UIP_UDP_TIMER); } while(0)
-
-/**
- * Periodic processing for a UDP connection identified by a pointer to
- * its structure.
- *
- * Same as uip_udp_periodic() but takes a pointer to the actual
- * uip_conn struct instead of an integer as its argument. This
- * function can be used to force periodic processing of a specific
- * connection.
- *
- * \param conn A pointer to the uip_udp_conn struct for the connection
- * to be processed.
- *
- * \hideinitializer
- */
-#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \
- uip_process(UIP_UDP_TIMER); } while(0)
-#endif /* UIP_UDP */
-
-/** \brief Abandon the reassembly of the current packet */
-void uip_reass_over(void);
-
-/**
- * The uIP packet buffer.
- *
- * The uip_buf array is used to hold incoming and outgoing
- * packets. The device driver should place incoming data into this
- * buffer. When sending data, the device driver should read the link
- * level headers and the TCP/IP headers from this buffer. The size of
- * the link level headers is configured by the UIP_LLH_LEN define.
- *
- * \note The application data need not be placed in this buffer, so
- * the device driver must read it from the place pointed to by the
- * uip_appdata pointer as illustrated by the following example:
- \code
- void
- devicedriver_send(void)
- {
- hwsend(&uip_buf[0], UIP_LLH_LEN);
- if(uip_len <= UIP_LLH_LEN + UIP_TCPIP_HLEN) {
- hwsend(&uip_buf[UIP_LLH_LEN], uip_len - UIP_LLH_LEN);
- } else {
- hwsend(&uip_buf[UIP_LLH_LEN], UIP_TCPIP_HLEN);
- hwsend(uip_appdata, uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN);
- }
- }
- \endcode
-*/
-extern u8_t uip_buf[UIP_BUFSIZE+2];
-
-
-
-/** @} */
-
-/*---------------------------------------------------------------------------*/
-/* Functions that are used by the uIP application program. Opening and
- * closing connections, sending and receiving data, etc. is all
- * handled by the functions below.
- */
-/**
- * \defgroup uipappfunc uIP application functions
- * @{
- *
- * Functions used by an application running of top of uIP.
- */
-
-/**
- * Start listening to the specified port.
- *
- * \note Since this function expects the port number in network byte
- * order, a conversion using HTONS() or htons() is necessary.
- *
- \code
- uip_listen(HTONS(80));
- \endcode
- *
- * \param port A 16-bit port number in network byte order.
- */
-void uip_listen(u16_t port);
-
-/**
- * Stop listening to the specified port.
- *
- * \note Since this function expects the port number in network byte
- * order, a conversion using HTONS() or htons() is necessary.
- *
- \code
- uip_unlisten(HTONS(80));
- \endcode
- *
- * \param port A 16-bit port number in network byte order.
- */
-void uip_unlisten(u16_t port);
-
-/**
- * Connect to a remote host using TCP.
- *
- * This function is used to start a new connection to the specified
- * port on the specified host. It allocates a new connection identifier,
- * sets the connection to the SYN_SENT state and sets the
- * retransmission timer to 0. This will cause a TCP SYN segment to be
- * sent out the next time this connection is periodically processed,
- * which usually is done within 0.5 seconds after the call to
- * uip_connect().
- *
- * \note This function is available only if support for active open
- * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h.
- *
- * \note Since this function requires the port number to be in network
- * byte order, a conversion using HTONS() or htons() is necessary.
- *
- \code
- uip_ipaddr_t ipaddr;
-
- uip_ipaddr(&ipaddr, 192,168,1,2);
- uip_connect(&ipaddr, HTONS(80));
- \endcode
- *
- * \param ripaddr The IP address of the remote host.
- *
- * \param port A 16-bit port number in network byte order.
- *
- * \return A pointer to the uIP connection identifier for the new connection,
- * or NULL if no connection could be allocated.
- *
- */
-struct uip_conn *uip_connect(uip_ipaddr_t *ripaddr, u16_t port);
-
-
-
-/**
- * \internal
- *
- * Check if a connection has outstanding (i.e., unacknowledged) data.
- *
- * \param conn A pointer to the uip_conn structure for the connection.
- *
- * \hideinitializer
- */
-#define uip_outstanding(conn) ((conn)->len)
-
-/**
- * Send data on the current connection.
- *
- * This function is used to send out a single segment of TCP
- * data. Only applications that have been invoked by uIP for event
- * processing can send data.
- *
- * The amount of data that actually is sent out after a call to this
- * function is determined by the maximum amount of data TCP allows. uIP
- * will automatically crop the data so that only the appropriate
- * amount of data is sent. The function uip_mss() can be used to query
- * uIP for the amount of data that actually will be sent.
- *
- * \note This function does not guarantee that the sent data will
- * arrive at the destination. If the data is lost in the network, the
- * application will be invoked with the uip_rexmit() event being
- * set. The application will then have to resend the data using this
- * function.
- *
- * \param data A pointer to the data which is to be sent.
- *
- * \param len The maximum amount of data bytes to be sent.
- *
- * \hideinitializer
- */
-void uip_send(const void *data, int len);
-
-/**
- * The length of any incoming data that is currently available (if available)
- * in the uip_appdata buffer.
- *
- * The test function uip_data() must first be used to check if there
- * is any data available at all.
- *
- * \hideinitializer
- */
-/*void uip_datalen(void);*/
-#define uip_datalen() uip_len
-
-/**
- * The length of any out-of-band data (urgent data) that has arrived
- * on the connection.
- *
- * \note The configuration parameter UIP_URGDATA must be set for this
- * function to be enabled.
- *
- * \hideinitializer
- */
-#define uip_urgdatalen() uip_urglen
-
-/**
- * Close the current connection.
- *
- * This function will close the current connection in a nice way.
- *
- * \hideinitializer
- */
-#define uip_close() (uip_flags = UIP_CLOSE)
-
-/**
- * Abort the current connection.
- *
- * This function will abort (reset) the current connection, and is
- * usually used when an error has occurred that prevents using the
- * uip_close() function.
- *
- * \hideinitializer
- */
-#define uip_abort() (uip_flags = UIP_ABORT)
-
-/**
- * Tell the sending host to stop sending data.
- *
- * This function will close our receiver's window so that we stop
- * receiving data for the current connection.
- *
- * \hideinitializer
- */
-#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
-
-/**
- * Find out if the current connection has been previously stopped with
- * uip_stop().
- *
- * \hideinitializer
- */
-#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED)
-
-/**
- * Restart the current connection, if is has previously been stopped
- * with uip_stop().
- *
- * This function will open the receiver's window again so that we
- * start receiving data for the current connection.
- *
- * \hideinitializer
- */
-#define uip_restart() do { uip_flags |= UIP_NEWDATA; \
- uip_conn->tcpstateflags &= ~UIP_STOPPED; \
- } while(0)
-
-
-/* uIP tests that can be made to determine in what state the current
- connection is, and what the application function should do. */
-
-/**
- * Is the current connection a UDP connection?
- *
- * This function checks whether the current connection is a UDP connection.
- *
- * \hideinitializer
- *
- */
-#define uip_udpconnection() (uip_conn == NULL)
-
-/**
- * Is new incoming data available?
- *
- * Will reduce to non-zero if there is new data for the application
- * present at the uip_appdata pointer. The size of the data is
- * available through the uip_len variable.
- *
- * \hideinitializer
- */
-#define uip_newdata() (uip_flags & UIP_NEWDATA)
-
-/**
- * Has previously sent data been acknowledged?
- *
- * Will reduce to non-zero if the previously sent data has been
- * acknowledged by the remote host. This means that the application
- * can send new data.
- *
- * \hideinitializer
- */
-#define uip_acked() (uip_flags & UIP_ACKDATA)
-
-/**
- * Has the connection just been connected?
- *
- * Reduces to non-zero if the current connection has been connected to
- * a remote host. This will happen both if the connection has been
- * actively opened (with uip_connect()) or passively opened (with
- * uip_listen()).
- *
- * \hideinitializer
- */
-#define uip_connected() (uip_flags & UIP_CONNECTED)
-
-/**
- * Has the connection been closed by the other end?
- *
- * Is non-zero if the connection has been closed by the remote
- * host. The application may then do the necessary clean-ups.
- *
- * \hideinitializer
- */
-#define uip_closed() (uip_flags & UIP_CLOSE)
-
-/**
- * Has the connection been aborted by the other end?
- *
- * Non-zero if the current connection has been aborted (reset) by the
- * remote host.
- *
- * \hideinitializer
- */
-#define uip_aborted() (uip_flags & UIP_ABORT)
-
-/**
- * Has the connection timed out?
- *
- * Non-zero if the current connection has been aborted due to too many
- * retransmissions.
- *
- * \hideinitializer
- */
-#define uip_timedout() (uip_flags & UIP_TIMEDOUT)
-
-/**
- * Do we need to retransmit previously data?
- *
- * Reduces to non-zero if the previously sent data has been lost in
- * the network, and the application should retransmit it. The
- * application should send the exact same data as it did the last
- * time, using the uip_send() function.
- *
- * \hideinitializer
- */
-#define uip_rexmit() (uip_flags & UIP_REXMIT)
-
-/**
- * Is the connection being polled by uIP?
- *
- * Is non-zero if the reason the application is invoked is that the
- * current connection has been idle for a while and should be
- * polled.
- *
- * The polling event can be used for sending data without having to
- * wait for the remote host to send data.
- *
- * \hideinitializer
- */
-#define uip_poll() (uip_flags & UIP_POLL)
-
-/**
- * Get the initial maximum segment size (MSS) of the current
- * connection.
- *
- * \hideinitializer
- */
-#define uip_initialmss() (uip_conn->initialmss)
-
-/**
- * Get the current maximum segment size that can be sent on the current
- * connection.
- *
- * The current maximum segment size that can be sent on the
- * connection is computed from the receiver's window and the MSS of
- * the connection (which also is available by calling
- * uip_initialmss()).
- *
- * \hideinitializer
- */
-#define uip_mss() (uip_conn->mss)
-
-/**
- * Set up a new UDP connection.
- *
- * This function sets up a new UDP connection. The function will
- * automatically allocate an unused local port for the new
- * connection. However, another port can be chosen by using the
- * uip_udp_bind() call, after the uip_udp_new() function has been
- * called.
- *
- * Example:
- \code
- uip_ipaddr_t addr;
- struct uip_udp_conn *c;
-
- uip_ipaddr(&addr, 192,168,2,1);
- c = uip_udp_new(&addr, HTONS(12345));
- if(c != NULL) {
- uip_udp_bind(c, HTONS(12344));
- }
- \endcode
- * \param ripaddr The IP address of the remote host.
- *
- * \param rport The remote port number in network byte order.
- *
- * \return The uip_udp_conn structure for the new connection or NULL
- * if no connection could be allocated.
- */
-struct uip_udp_conn *uip_udp_new(const uip_ipaddr_t *ripaddr, u16_t rport);
-
-/**
- * Removed a UDP connection.
- *
- * \param conn A pointer to the uip_udp_conn structure for the connection.
- *
- * \hideinitializer
- */
-#define uip_udp_remove(conn) (conn)->lport = 0
-
-/**
- * Bind a UDP connection to a local port.
- *
- * \param conn A pointer to the uip_udp_conn structure for the
- * connection.
- *
- * \param port The local port number, in network byte order.
- *
- * \hideinitializer
- */
-#define uip_udp_bind(conn, port) (conn)->lport = port
-
-/**
- * Send a UDP datagram of length len on the current connection.
- *
- * This function can only be called in response to a UDP event (poll
- * or newdata). The data must be present in the uip_buf buffer, at the
- * place pointed to by the uip_appdata pointer.
- *
- * \param len The length of the data in the uip_buf buffer.
- *
- * \hideinitializer
- */
-#define uip_udp_send(len) uip_send((char *)uip_appdata, len)
-
-/** @} */
-
-/* uIP convenience and converting functions. */
-
-/**
- * \defgroup uipconvfunc uIP conversion functions
- * @{
- *
- * These functions can be used for converting between different data
- * formats used by uIP.
- */
-
-/**
- * Convert an IP address to four bytes separated by commas.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr;
- printf("ipaddr=%d.%d.%d.%d\n", uip_ipaddr_to_quad(&ipaddr));
- \endcode
- *
- * \param a A pointer to a uip_ipaddr_t.
- * \hideinitializer
- */
-#define uip_ipaddr_to_quad(a) (a)->u8[0],(a)->u8[1],(a)->u8[2],(a)->u8[3]
-
-/**
- * Construct an IP address from four bytes.
- *
- * This function constructs an IP address of the type that uIP handles
- * internally from four bytes. The function is handy for specifying IP
- * addresses to use with e.g. the uip_connect() function.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr;
- struct uip_conn *c;
-
- uip_ipaddr(&ipaddr, 192,168,1,2);
- c = uip_connect(&ipaddr, HTONS(80));
- \endcode
- *
- * \param addr A pointer to a uip_ipaddr_t variable that will be
- * filled in with the IP address.
- *
- * \param addr0 The first octet of the IP address.
- * \param addr1 The second octet of the IP address.
- * \param addr2 The third octet of the IP address.
- * \param addr3 The forth octet of the IP address.
- *
- * \hideinitializer
- */
-#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
- (addr)->u8[0] = addr0; \
- (addr)->u8[1] = addr1; \
- (addr)->u8[2] = addr2; \
- (addr)->u8[3] = addr3; \
- } while(0)
-
-/**
- * Construct an IPv6 address from eight 16-bit words.
- *
- * This function constructs an IPv6 address.
- *
- * \hideinitializer
- */
-#define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \
- (addr)->u16[0] = HTONS(addr0); \
- (addr)->u16[1] = HTONS(addr1); \
- (addr)->u16[2] = HTONS(addr2); \
- (addr)->u16[3] = HTONS(addr3); \
- (addr)->u16[4] = HTONS(addr4); \
- (addr)->u16[5] = HTONS(addr5); \
- (addr)->u16[6] = HTONS(addr6); \
- (addr)->u16[7] = HTONS(addr7); \
- } while(0)
-
-/**
- * Construct an IPv6 address from eight 8-bit words.
- *
- * This function constructs an IPv6 address.
- *
- * \hideinitializer
- */
-#define uip_ip6addr_u8(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7,addr8,addr9,addr10,addr11,addr12,addr13,addr14,addr15) do { \
- (addr)->u8[0] = addr0; \
- (addr)->u8[1] = addr1; \
- (addr)->u8[2] = addr2; \
- (addr)->u8[3] = addr3; \
- (addr)->u8[4] = addr4; \
- (addr)->u8[5] = addr5; \
- (addr)->u8[6] = addr6; \
- (addr)->u8[7] = addr7; \
- (addr)->u8[8] = addr8; \
- (addr)->u8[9] = addr9; \
- (addr)->u8[10] = addr10; \
- (addr)->u8[11] = addr11; \
- (addr)->u8[12] = addr12; \
- (addr)->u8[13] = addr13; \
- (addr)->u8[14] = addr14; \
- (addr)->u8[15] = addr15; \
- } while(0)
-
-
-/**
- * Copy an IP address to another IP address.
- *
- * Copies an IP address from one place to another.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr1, ipaddr2;
-
- uip_ipaddr(&ipaddr1, 192,16,1,2);
- uip_ipaddr_copy(&ipaddr2, &ipaddr1);
- \endcode
- *
- * \param dest The destination for the copy.
- * \param src The source from where to copy.
- *
- * \hideinitializer
- */
-#ifndef uip_ipaddr_copy
-#define uip_ipaddr_copy(dest, src) (*(dest) = *(src))
-#endif
-
-/**
- * Compare two IP addresses
- *
- * Compares two IP addresses.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr1, ipaddr2;
-
- uip_ipaddr(&ipaddr1, 192,16,1,2);
- if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) {
- printf("They are the same");
- }
- \endcode
- *
- * \param addr1 The first IP address.
- * \param addr2 The second IP address.
- *
- * \hideinitializer
- */
-#if !UIP_CONF_IPV6
-#define uip_ipaddr_cmp(addr1, addr2) ((addr1)->u16[0] == (addr2)->u16[0] && \
- (addr1)->u16[1] == (addr2)->u16[1])
-#else /* !UIP_CONF_IPV6 */
-#define uip_ipaddr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0)
-#endif /* !UIP_CONF_IPV6 */
-
-/**
- * Compare two IP addresses with netmasks
- *
- * Compares two IP addresses with netmasks. The masks are used to mask
- * out the bits that are to be compared.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr1, ipaddr2, mask;
-
- uip_ipaddr(&mask, 255,255,255,0);
- uip_ipaddr(&ipaddr1, 192,16,1,2);
- uip_ipaddr(&ipaddr2, 192,16,1,3);
- if(uip_ipaddr_maskcmp(&ipaddr1, &ipaddr2, &mask)) {
- printf("They are the same");
- }
- \endcode
- *
- * \param addr1 The first IP address.
- * \param addr2 The second IP address.
- * \param mask The netmask.
- *
- * \hideinitializer
- */
-#if !UIP_CONF_IPV6
-#define uip_ipaddr_maskcmp(addr1, addr2, mask) \
- (((((u16_t *)addr1)[0] & ((u16_t *)mask)[0]) == \
- (((u16_t *)addr2)[0] & ((u16_t *)mask)[0])) && \
- ((((u16_t *)addr1)[1] & ((u16_t *)mask)[1]) == \
- (((u16_t *)addr2)[1] & ((u16_t *)mask)[1])))
-#else
-#define uip_ipaddr_prefixcmp(addr1, addr2, length) (memcmp(addr1, addr2, length>>3) == 0)
-#endif
-
-
-/**
- * Check if an address is a broadcast address for a network.
- *
- * Checks if an address is the broadcast address for a network. The
- * network is defined by an IP address that is on the network and the
- * network's netmask.
- *
- * \param addr The IP address.
- * \param netaddr The network's IP address.
- * \param netmask The network's netmask.
- *
- * \hideinitializer
- */
-/*#define uip_ipaddr_isbroadcast(addr, netaddr, netmask)
- ((uip_ipaddr_t *)(addr)).u16 & ((uip_ipaddr_t *)(addr)).u16*/
-
-
-
-/**
- * Mask out the network part of an IP address.
- *
- * Masks out the network part of an IP address, given the address and
- * the netmask.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr1, ipaddr2, netmask;
-
- uip_ipaddr(&ipaddr1, 192,16,1,2);
- uip_ipaddr(&netmask, 255,255,255,0);
- uip_ipaddr_mask(&ipaddr2, &ipaddr1, &netmask);
- \endcode
- *
- * In the example above, the variable "ipaddr2" will contain the IP
- * address 192.168.1.0.
- *
- * \param dest Where the result is to be placed.
- * \param src The IP address.
- * \param mask The netmask.
- *
- * \hideinitializer
- */
-#define uip_ipaddr_mask(dest, src, mask) do { \
- ((u16_t *)dest)[0] = ((u16_t *)src)[0] & ((u16_t *)mask)[0]; \
- ((u16_t *)dest)[1] = ((u16_t *)src)[1] & ((u16_t *)mask)[1]; \
- } while(0)
-
-/**
- * Pick the first octet of an IP address.
- *
- * Picks out the first octet of an IP address.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr;
- u8_t octet;
-
- uip_ipaddr(&ipaddr, 1,2,3,4);
- octet = uip_ipaddr1(&ipaddr);
- \endcode
- *
- * In the example above, the variable "octet" will contain the value 1.
- *
- * \hideinitializer
- */
-#define uip_ipaddr1(addr) ((addr)->u8[0])
-
-/**
- * Pick the second octet of an IP address.
- *
- * Picks out the second octet of an IP address.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr;
- u8_t octet;
-
- uip_ipaddr(&ipaddr, 1,2,3,4);
- octet = uip_ipaddr2(&ipaddr);
- \endcode
- *
- * In the example above, the variable "octet" will contain the value 2.
- *
- * \hideinitializer
- */
-#define uip_ipaddr2(addr) ((addr)->u8[1])
-
-/**
- * Pick the third octet of an IP address.
- *
- * Picks out the third octet of an IP address.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr;
- u8_t octet;
-
- uip_ipaddr(&ipaddr, 1,2,3,4);
- octet = uip_ipaddr3(&ipaddr);
- \endcode
- *
- * In the example above, the variable "octet" will contain the value 3.
- *
- * \hideinitializer
- */
-#define uip_ipaddr3(addr) ((addr)->u8[2])
-
-/**
- * Pick the fourth octet of an IP address.
- *
- * Picks out the fourth octet of an IP address.
- *
- * Example:
- \code
- uip_ipaddr_t ipaddr;
- u8_t octet;
-
- uip_ipaddr(&ipaddr, 1,2,3,4);
- octet = uip_ipaddr4(&ipaddr);
- \endcode
- *
- * In the example above, the variable "octet" will contain the value 4.
- *
- * \hideinitializer
- */
-#define uip_ipaddr4(addr) ((addr)->u8[3])
-
-/**
- * Convert 16-bit quantity from host byte order to network byte order.
- *
- * This macro is primarily used for converting constants from host
- * byte order to network byte order. For converting variables to
- * network byte order, use the htons() function instead.
- *
- * \hideinitializer
- */
-#ifndef HTONS
-# if UIP_BYTE_ORDER == UIP_BIG_ENDIAN
-# define HTONS(n) (n)
-# define HTONL(n) (n)
-# else /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */
-# define HTONS(n) (u16_t)((((u16_t) (n)) << 8) | (((u16_t) (n)) >> 8))
-# define HTONL(n) (((u32_t)HTONS(n) << 16) | HTONS((u32_t)(n) >> 16))
-# endif /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */
-#else
-#error "HTONS already defined!"
-#endif /* HTONS */
-
-/**
- * Convert 16-bit quantity from host byte order to network byte order.
- *
- * This function is primarily used for converting variables from host
- * byte order to network byte order. For converting constants to
- * network byte order, use the HTONS() macro instead.
- */
-#ifndef htons
-u16_t htons(u16_t val);
-#endif /* htons */
-#ifndef ntohs
-#define ntohs htons
-#endif
-
-#ifndef htonl
-u32_t htonl(u32_t val);
-#endif /* htonl */
-#ifndef ntohl
-#define ntohl htonl
-#endif
-
-/** @} */
-
-/**
- * Pointer to the application data in the packet buffer.
- *
- * This pointer points to the application data when the application is
- * called. If the application wishes to send data, the application may
- * use this space to write the data into before calling uip_send().
- */
-extern void *uip_appdata;
-
-#if UIP_URGDATA > 0
-/* u8_t *uip_urgdata:
- *
- * This pointer points to any urgent data that has been received. Only
- * present if compiled with support for urgent data (UIP_URGDATA).
- */
-extern void *uip_urgdata;
-#endif /* UIP_URGDATA > 0 */
-
-
-/**
- * \defgroup uipdrivervars Variables used in uIP device drivers
- * @{
- *
- * uIP has a few global variables that are used in device drivers for
- * uIP.
- */
-
-/**
- * The length of the packet in the uip_buf buffer.
- *
- * The global variable uip_len holds the length of the packet in the
- * uip_buf buffer.
- *
- * When the network device driver calls the uIP input function,
- * uip_len should be set to the length of the packet in the uip_buf
- * buffer.
- *
- * When sending packets, the device driver should use the contents of
- * the uip_len variable to determine the length of the outgoing
- * packet.
- *
- */
-extern u16_t uip_len;
-
-/**
- * The length of the extension headers
- */
-extern u8_t uip_ext_len;
-/** @} */
-
-#if UIP_URGDATA > 0
-extern u16_t uip_urglen, uip_surglen;
-#endif /* UIP_URGDATA > 0 */
-
-
-/**
- * Representation of a uIP TCP connection.
- *
- * The uip_conn structure is used for identifying a connection. All
- * but one field in the structure are to be considered read-only by an
- * application. The only exception is the appstate field whose purpose
- * is to let the application store application-specific state (e.g.,
- * file pointers) for the connection. The type of this field is
- * configured in the "uipopt.h" header file.
- */
-struct uip_conn {
- uip_ipaddr_t ripaddr; /**< The IP address of the remote host. */
-
- u16_t lport; /**< The local TCP port, in network byte order. */
- u16_t rport; /**< The local remote TCP port, in network byte
- order. */
-
- u8_t rcv_nxt[4]; /**< The sequence number that we expect to
- receive next. */
- u8_t snd_nxt[4]; /**< The sequence number that was last sent by
- us. */
- u16_t len; /**< Length of the data that was previously sent. */
- u16_t mss; /**< Current maximum segment size for the
- connection. */
- u16_t initialmss; /**< Initial maximum segment size for the
- connection. */
- u8_t sa; /**< Retransmission time-out calculation state
- variable. */
- u8_t sv; /**< Retransmission time-out calculation state
- variable. */
- u8_t rto; /**< Retransmission time-out. */
- u8_t tcpstateflags; /**< TCP state and flags. */
- u8_t timer; /**< The retransmission timer. */
- u8_t nrtx; /**< The number of retransmissions for the last
- segment sent. */
-
- /** The application state. */
- uip_tcp_appstate_t appstate;
-};
-
-
-/**
- * Pointer to the current TCP connection.
- *
- * The uip_conn pointer can be used to access the current TCP
- * connection.
- */
-
-extern struct uip_conn *uip_conn;
-#if UIP_TCP
-/* The array containing all uIP connections. */
-extern struct uip_conn uip_conns[UIP_CONNS];
-#endif
-
-/**
- * \addtogroup uiparch
- * @{
- */
-
-/**
- * 4-byte array used for the 32-bit sequence number calculations.
- */
-extern u8_t uip_acc32[4];
-/** @} */
-
-/**
- * Representation of a uIP UDP connection.
- */
-struct uip_udp_conn {
- uip_ipaddr_t ripaddr; /**< The IP address of the remote peer. */
- u16_t lport; /**< The local port number in network byte order. */
- u16_t rport; /**< The remote port number in network byte order. */
- u8_t ttl; /**< Default time-to-live. */
-
- /** The application state. */
- uip_udp_appstate_t appstate;
-};
-
-/**
- * The current UDP connection.
- */
-extern struct uip_udp_conn *uip_udp_conn;
-extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
-
-struct uip_router {
- int (*activate)(void);
- int (*deactivate)(void);
- uip_ipaddr_t *(*lookup)(uip_ipaddr_t *destipaddr, uip_ipaddr_t *nexthop);
-};
-
-#if UIP_CONF_ROUTER
-extern const struct uip_router *uip_router;
-
-/**
- * uIP routing driver registration function.
- */
-void uip_router_register(const struct uip_router *router);
-#endif /*UIP_CONF_ROUTER*/
-
-#if UIP_CONF_ICMP6
-struct uip_icmp6_conn {
- uip_icmp6_appstate_t appstate;
-};
-extern struct uip_icmp6_conn uip_icmp6_conns;
-#endif /*UIP_CONF_ICMP6*/
-
-/**
- * The uIP TCP/IP statistics.
- *
- * This is the variable in which the uIP TCP/IP statistics are gathered.
- */
-#if UIP_STATISTICS == 1
-extern struct uip_stats uip_stat;
-#define UIP_STAT(s) s
-#else
-#define UIP_STAT(s)
-#endif /* UIP_STATISTICS == 1 */
-
-/**
- * The structure holding the TCP/IP statistics that are gathered if
- * UIP_STATISTICS is set to 1.
- *
- */
-struct uip_stats {
- struct {
- uip_stats_t recv; /**< Number of received packets at the IP
- layer. */
- uip_stats_t sent; /**< Number of sent packets at the IP
- layer. */
- uip_stats_t forwarded;/**< Number of forwarded packets at the IP
- layer. */
- uip_stats_t drop; /**< Number of dropped packets at the IP
- layer. */
- uip_stats_t vhlerr; /**< Number of packets dropped due to wrong
- IP version or header length. */
- uip_stats_t hblenerr; /**< Number of packets dropped due to wrong
- IP length, high byte. */
- uip_stats_t lblenerr; /**< Number of packets dropped due to wrong
- IP length, low byte. */
- uip_stats_t fragerr; /**< Number of packets dropped since they
- were IP fragments. */
- uip_stats_t chkerr; /**< Number of packets dropped due to IP
- checksum errors. */
- uip_stats_t protoerr; /**< Number of packets dropped since they
- were neither ICMP, UDP nor TCP. */
- } ip; /**< IP statistics. */
- struct {
- uip_stats_t recv; /**< Number of received ICMP packets. */
- uip_stats_t sent; /**< Number of sent ICMP packets. */
- uip_stats_t drop; /**< Number of dropped ICMP packets. */
- uip_stats_t typeerr; /**< Number of ICMP packets with a wrong
- type. */
- uip_stats_t chkerr; /**< Number of ICMP packets with a bad
- checksum. */
- } icmp; /**< ICMP statistics. */
-#if UIP_TCP
- struct {
- uip_stats_t recv; /**< Number of recived TCP segments. */
- uip_stats_t sent; /**< Number of sent TCP segments. */
- uip_stats_t drop; /**< Number of dropped TCP segments. */
- uip_stats_t chkerr; /**< Number of TCP segments with a bad
- checksum. */
- uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK
- number. */
- uip_stats_t rst; /**< Number of recevied TCP RST (reset) segments. */
- uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */
- uip_stats_t syndrop; /**< Number of dropped SYNs due to too few
- connections was avaliable. */
- uip_stats_t synrst; /**< Number of SYNs for closed ports,
- triggering a RST. */
- } tcp; /**< TCP statistics. */
-#endif
-#if UIP_UDP
- struct {
- uip_stats_t drop; /**< Number of dropped UDP segments. */
- uip_stats_t recv; /**< Number of recived UDP segments. */
- uip_stats_t sent; /**< Number of sent UDP segments. */
- uip_stats_t chkerr; /**< Number of UDP segments with a bad
- checksum. */
- } udp; /**< UDP statistics. */
-#endif /* UIP_UDP */
-#if UIP_CONF_IPV6
- struct {
- uip_stats_t drop; /**< Number of dropped ND6 packets. */
- uip_stats_t recv; /**< Number of recived ND6 packets */
- uip_stats_t sent; /**< Number of sent ND6 packets */
- } nd6;
-#endif /*UIP_CONF_IPV6*/
-};
-
-
-/*---------------------------------------------------------------------------*/
-/* All the stuff below this point is internal to uIP and should not be
- * used directly by an application or by a device driver.
- */
-/*---------------------------------------------------------------------------*/
-
-
-
-/* u8_t uip_flags:
- *
- * When the application is called, uip_flags will contain the flags
- * that are defined in this file. Please read below for more
- * information.
- */
-extern u8_t uip_flags;
-
-/* The following flags may be set in the global variable uip_flags
- before calling the application callback. The UIP_ACKDATA,
- UIP_NEWDATA, and UIP_CLOSE flags may both be set at the same time,
- whereas the others are mutually exclusive. Note that these flags
- should *NOT* be accessed directly, but only through the uIP
- functions/macros. */
-
-#define UIP_ACKDATA 1 /* Signifies that the outstanding data was
- acked and the application should send
- out new data instead of retransmitting
- the last data. */
-#define UIP_NEWDATA 2 /* Flags the fact that the peer has sent
- us new data. */
-#define UIP_REXMIT 4 /* Tells the application to retransmit the
- data that was last sent. */
-#define UIP_POLL 8 /* Used for polling the application, to
- check if the application has data that
- it wants to send. */
-#define UIP_CLOSE 16 /* The remote host has closed the
- connection, thus the connection has
- gone away. Or the application signals
- that it wants to close the
- connection. */
-#define UIP_ABORT 32 /* The remote host has aborted the
- connection, thus the connection has
- gone away. Or the application signals
- that it wants to abort the
- connection. */
-#define UIP_CONNECTED 64 /* We have got a connection from a remote
- host and have set up a new connection
- for it, or an active connection has
- been successfully established. */
-
-#define UIP_TIMEDOUT 128 /* The connection has been aborted due to
- too many retransmissions. */
-
-
-/**
- * \brief process the options within a hop by hop or destination option header
- * \retval 0: nothing to send,
- * \retval 1: drop pkt
- * \retval 2: ICMP error message to send
-*/
-/*static u8_t
-uip_ext_hdr_options_process(); */
-
-/* uip_process(flag):
- *
- * The actual uIP function which does all the work.
- */
-void uip_process(u8_t flag);
-
- /* The following flags are passed as an argument to the uip_process()
- function. They are used to distinguish between the two cases where
- uip_process() is called. It can be called either because we have
- incoming data that should be processed, or because the periodic
- timer has fired. These values are never used directly, but only in
- the macros defined in this file. */
-
-#define UIP_DATA 1 /* Tells uIP that there is incoming
- data in the uip_buf buffer. The
- length of the data is stored in the
- global variable uip_len. */
-#define UIP_TIMER 2 /* Tells uIP that the periodic timer
- has fired. */
-#define UIP_POLL_REQUEST 3 /* Tells uIP that a connection should
- be polled. */
-#define UIP_UDP_SEND_CONN 4 /* Tells uIP that a UDP datagram
- should be constructed in the
- uip_buf buffer. */
-#if UIP_UDP
-#define UIP_UDP_TIMER 5
-#endif /* UIP_UDP */
-
-/* The TCP states used in the uip_conn->tcpstateflags. */
-#define UIP_CLOSED 0
-#define UIP_SYN_RCVD 1
-#define UIP_SYN_SENT 2
-#define UIP_ESTABLISHED 3
-#define UIP_FIN_WAIT_1 4
-#define UIP_FIN_WAIT_2 5
-#define UIP_CLOSING 6
-#define UIP_TIME_WAIT 7
-#define UIP_LAST_ACK 8
-#define UIP_TS_MASK 15
-
-#define UIP_STOPPED 16
-
-/* The TCP and IP headers. */
-struct uip_tcpip_hdr {
-#if UIP_CONF_IPV6
- /* IPv6 header. */
- u8_t vtc,
- tcflow;
- u16_t flow;
- u8_t len[2];
- u8_t proto, ttl;
- uip_ip6addr_t srcipaddr, destipaddr;
-#else /* UIP_CONF_IPV6 */
- /* IPv4 header. */
- u8_t vhl,
- tos,
- len[2],
- ipid[2],
- ipoffset[2],
- ttl,
- proto;
- u16_t ipchksum;
- uip_ipaddr_t srcipaddr, destipaddr;
-#endif /* UIP_CONF_IPV6 */
-
- /* TCP header. */
- u16_t srcport,
- destport;
- u8_t seqno[4],
- ackno[4],
- tcpoffset,
- flags,
- wnd[2];
- u16_t tcpchksum;
- u8_t urgp[2];
- u8_t optdata[4];
-};
-
-/* The ICMP and IP headers. */
-struct uip_icmpip_hdr {
-#if UIP_CONF_IPV6
- /* IPv6 header. */
- u8_t vtc,
- tcf;
- u16_t flow;
- u8_t len[2];
- u8_t proto, ttl;
- uip_ip6addr_t srcipaddr, destipaddr;
-#else /* UIP_CONF_IPV6 */
- /* IPv4 header. */
- u8_t vhl,
- tos,
- len[2],
- ipid[2],
- ipoffset[2],
- ttl,
- proto;
- u16_t ipchksum;
- uip_ipaddr_t srcipaddr, destipaddr;
-#endif /* UIP_CONF_IPV6 */
-
- /* ICMP header. */
- u8_t type, icode;
- u16_t icmpchksum;
-#if !UIP_CONF_IPV6
- u16_t id, seqno;
- u8_t payload[1];
-#endif /* !UIP_CONF_IPV6 */
-};
-
-
-/* The UDP and IP headers. */
-struct uip_udpip_hdr {
-#if UIP_CONF_IPV6
- /* IPv6 header. */
- u8_t vtc,
- tcf;
- u16_t flow;
- u8_t len[2];
- u8_t proto, ttl;
- uip_ip6addr_t srcipaddr, destipaddr;
-#else /* UIP_CONF_IPV6 */
- /* IP header. */
- u8_t vhl,
- tos,
- len[2],
- ipid[2],
- ipoffset[2],
- ttl,
- proto;
- u16_t ipchksum;
- uip_ipaddr_t srcipaddr, destipaddr;
-#endif /* UIP_CONF_IPV6 */
-
- /* UDP header. */
- u16_t srcport,
- destport;
- u16_t udplen;
- u16_t udpchksum;
-};
-
-/*
- * In IPv6 the length of the L3 headers before the transport header is
- * not fixed, due to the possibility to include extension option headers
- * after the IP header. hence we split here L3 and L4 headers
- */
-/* The IP header */
-struct uip_ip_hdr {
-#if UIP_CONF_IPV6
- /* IPV6 header */
- u8_t vtc;
- u8_t tcflow;
- u16_t flow;
- u8_t len[2];
- u8_t proto, ttl;
- uip_ip6addr_t srcipaddr, destipaddr;
-#else /* UIP_CONF_IPV6 */
- /* IPV4 header */
- u8_t vhl,
- tos,
- len[2],
- ipid[2],
- ipoffset[2],
- ttl,
- proto;
- u16_t ipchksum;
- uip_ipaddr_t srcipaddr, destipaddr;
-#endif /* UIP_CONF_IPV6 */
-};
-
-
-/*
- * IPv6 extension option headers: we are able to process
- * the 4 extension headers defined in RFC2460 (IPv6):
- * - Hop by hop option header, destination option header:
- * These two are not used by any core IPv6 protocol, hence
- * we just read them and go to the next. They convey options,
- * the options defined in RFC2460 are Pad1 and PadN, which do
- * some padding, and that we do not need to read (the length
- * field in the header is enough)
- * - Routing header: this one is most notably used by MIPv6,
- * which we do not implement, hence we just read it and go
- * to the next
- * - Fragmentation header: we read this header and are able to
- * reassemble packets
- *
- * We do not offer any means to send packets with extension headers
- *
- * We do not implement Authentication and ESP headers, which are
- * used in IPSec and defined in RFC4302,4303,4305,4385
- */
-/* common header part */
-struct uip_ext_hdr {
- u8_t next;
- u8_t len;
-};
-
-/* Hop by Hop option header */
-struct uip_hbho_hdr {
- u8_t next;
- u8_t len;
-};
-
-/* destination option header */
-struct uip_desto_hdr {
- u8_t next;
- u8_t len;
-};
-
-/* We do not define structures for PAD1 and PADN options */
-
-/*
- * routing header
- * the routing header as 4 common bytes, then routing header type
- * specific data there are several types of routing header. Type 0 was
- * deprecated as per RFC5095 most notable other type is 2, used in
- * RFC3775 (MIPv6) here we do not implement MIPv6, so we just need to
- * parse the 4 first bytes
- */
-struct uip_routing_hdr {
- u8_t next;
- u8_t len;
- u8_t routing_type;
- u8_t seg_left;
-};
-
-/* fragmentation header */
-struct uip_frag_hdr {
- u8_t next;
- u8_t res;
- u16_t offsetresmore;
- u32_t id;
-};
-
-/*
- * an option within the destination or hop by hop option headers
- * it contains type an length, which is true for all options but PAD1
- */
-struct uip_ext_hdr_opt {
- u8_t type;
- u8_t len;
-};
-
-/* PADN option */
-struct uip_ext_hdr_opt_padn {
- u8_t opt_type;
- u8_t opt_len;
-};
-
-/* TCP header */
-struct uip_tcp_hdr {
- u16_t srcport;
- u16_t destport;
- u8_t seqno[4];
- u8_t ackno[4];
- u8_t tcpoffset;
- u8_t flags;
- u8_t wnd[2];
- u16_t tcpchksum;
- u8_t urgp[2];
- u8_t optdata[4];
-};
-
-/* The ICMP headers. */
-struct uip_icmp_hdr {
- u8_t type, icode;
- u16_t icmpchksum;
-#if !UIP_CONF_IPV6
- u16_t id, seqno;
-#endif /* !UIP_CONF_IPV6 */
-};
-
-
-/* The UDP headers. */
-struct uip_udp_hdr {
- u16_t srcport;
- u16_t destport;
- u16_t udplen;
- u16_t udpchksum;
-};
-
-
-/**
- * The buffer size available for user data in the \ref uip_buf buffer.
- *
- * This macro holds the available size for user data in the \ref
- * uip_buf buffer. The macro is intended to be used for checking
- * bounds of available user data.
- *
- * Example:
- \code
- snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i);
- \endcode
- *
- * \hideinitializer
- */
-#define UIP_APPDATA_SIZE (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN)
-#define UIP_APPDATA_PTR (void *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN]
-
-#define UIP_PROTO_ICMP 1
-#define UIP_PROTO_TCP 6
-#define UIP_PROTO_UDP 17
-#define UIP_PROTO_ICMP6 58
-
-
-#if UIP_CONF_IPV6
-/** @{ */
-/** \brief extension headers types */
-#define UIP_PROTO_HBHO 0
-#define UIP_PROTO_DESTO 60
-#define UIP_PROTO_ROUTING 43
-#define UIP_PROTO_FRAG 44
-#define UIP_PROTO_NONE 59
-/** @} */
-
-/** @{ */
-/** \brief Destination and Hop By Hop extension headers option types */
-#define UIP_EXT_HDR_OPT_PAD1 0
-#define UIP_EXT_HDR_OPT_PADN 1
-/** @} */
-
-/** @{ */
-/**
- * \brief Bitmaps for extension header processing
- *
- * When processing extension headers, we should record somehow which one we
- * see, because you cannot have twice the same header, except for destination
- * We store all this in one u8_t bitmap one bit for each header expected. The
- * order in the bitmap is the order recommended in RFC2460
- */
-#define UIP_EXT_HDR_BITMAP_HBHO 0x01
-#define UIP_EXT_HDR_BITMAP_DESTO1 0x02
-#define UIP_EXT_HDR_BITMAP_ROUTING 0x04
-#define UIP_EXT_HDR_BITMAP_FRAG 0x08
-#define UIP_EXT_HDR_BITMAP_AH 0x10
-#define UIP_EXT_HDR_BITMAP_ESP 0x20
-#define UIP_EXT_HDR_BITMAP_DESTO2 0x40
-/** @} */
-
-
-#endif /* UIP_CONF_IPV6 */
-
-
-/* Header sizes. */
-#if UIP_CONF_IPV6
-#define UIP_IPH_LEN 40
-#define UIP_FRAGH_LEN 8
-#else /* UIP_CONF_IPV6 */
-#define UIP_IPH_LEN 20 /* Size of IP header */
-#endif /* UIP_CONF_IPV6 */
-
-#define UIP_UDPH_LEN 8 /* Size of UDP header */
-#define UIP_TCPH_LEN 20 /* Size of TCP header */
-#ifdef UIP_IPH_LEN
-#define UIP_ICMPH_LEN 4 /* Size of ICMP header */
-#endif
-#define UIP_IPUDPH_LEN (UIP_UDPH_LEN + UIP_IPH_LEN) /* Size of IP +
- * UDP
- * header */
-#define UIP_IPTCPH_LEN (UIP_TCPH_LEN + UIP_IPH_LEN) /* Size of IP +
- * TCP
- * header */
-#define UIP_TCPIP_HLEN UIP_IPTCPH_LEN
-#define UIP_IPICMPH_LEN (UIP_IPH_LEN + UIP_ICMPH_LEN) /* size of ICMP
- + IP header */
-#define UIP_LLIPH_LEN (UIP_LLH_LEN + UIP_IPH_LEN) /* size of L2
- + IP header */
-#if UIP_CONF_IPV6
-/**
- * The sums below are quite used in ND. When used for uip_buf, we
- * include link layer length when used for uip_len, we do not, hence
- * we need values with and without LLH_LEN we do not use capital
- * letters as these values are variable
- */
-#define uip_l2_l3_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len)
-#define uip_l2_l3_icmp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN)
-#define uip_l3_hdr_len (UIP_IPH_LEN + uip_ext_len)
-#define uip_l3_icmp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN)
-#endif /*UIP_CONF_IPV6*/
-
-
-#if UIP_FIXEDADDR
-extern const uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr;
-#else /* UIP_FIXEDADDR */
-extern uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr;
-#endif /* UIP_FIXEDADDR */
-extern const uip_ipaddr_t uip_broadcast_addr;
-extern const uip_ipaddr_t uip_all_zeroes_addr;
-
-#if UIP_FIXEDETHADDR
-extern const uip_lladdr_t uip_lladdr;
-#else
-extern uip_lladdr_t uip_lladdr;
-#endif
-
-
-
-
-#ifdef UIP_CONF_IPV6
-/**
- * \brief Is IPv6 address a the unspecified address
- * a is of type uip_ipaddr_t
- */
-#define uip_is_addr_unspecified(a) \
- ((((a)->u16[0]) == 0) && \
- (((a)->u16[1]) == 0) && \
- (((a)->u16[2]) == 0) && \
- (((a)->u16[3]) == 0) && \
- (((a)->u16[4]) == 0) && \
- (((a)->u16[5]) == 0) && \
- (((a)->u16[6]) == 0) && \
- (((a)->u16[7]) == 0))
-
-/** \brief Is IPv6 address a the link local all-nodes multicast address */
-#define uip_is_addr_linklocal_allnodes_mcast(a) \
- ((((a)->u8[0]) == 0xff) && \
- (((a)->u8[1]) == 0x02) && \
- (((a)->u16[1]) == 0) && \
- (((a)->u16[2]) == 0) && \
- (((a)->u16[3]) == 0) && \
- (((a)->u16[4]) == 0) && \
- (((a)->u16[5]) == 0) && \
- (((a)->u16[6]) == 0) && \
- (((a)->u8[14]) == 0) && \
- (((a)->u8[15]) == 0x01))
-
-/** \brief set IP address a to unspecified */
-#define uip_create_unspecified(a) uip_ip6addr(a, 0, 0, 0, 0, 0, 0, 0, 0)
-
-/** \brief set IP address a to the link local all-nodes multicast address */
-#define uip_create_linklocal_allnodes_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0001)
-
-/** \brief set IP address a to the link local all-routers multicast address */
-#define uip_create_linklocal_allrouters_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0002)
-
-/**
- * \brief is addr (a) a solicited node multicast address, see RFC3513
- * a is of type uip_ipaddr_t*
- */
-#define uip_is_addr_solicited_node(a) \
- ((((a)->u8[0]) == 0xFF) && \
- (((a)->u8[1]) == 0x02) && \
- (((a)->u16[1]) == 0) && \
- (((a)->u16[2]) == 0) && \
- (((a)->u16[3]) == 0) && \
- (((a)->u16[4]) == 0) && \
- (((a)->u16[5]) == 1) && \
- (((a)->u8[12]) == 0xFF))
-
-/**
- * \briefput in b the solicited node address corresponding to address a
- * both a and b are of type uip_ipaddr_t*
- * */
-#define uip_create_solicited_node(a, b) \
- (((b)->u8[0]) = 0xFF); \
- (((b)->u8[1]) = 0x02); \
- (((b)->u16[1]) = 0); \
- (((b)->u16[2]) = 0); \
- (((b)->u16[3]) = 0); \
- (((b)->u16[4]) = 0); \
- (((b)->u8[10]) = 0); \
- (((b)->u8[11]) = 0x01); \
- (((b)->u8[12]) = 0xFF); \
- (((b)->u8[13]) = ((a)->u8[13])); \
- (((b)->u16[7]) = ((a)->u16[7]))
-
-/**
- * \brief is addr (a) a link local unicast address, see RFC3513
- * i.e. is (a) on prefix FE80::/10
- * a is of type uip_ipaddr_t*
- */
-#define uip_is_addr_link_local(a) \
- ((((a)->u8[0]) == 0xFE) && \
- (((a)->u8[1]) == 0x80))
-
-/**
- * \brief was addr (a) forged based on the mac address m
- * a type is uip_ipaddr_t
- * m type is uiplladdr_t
- */
-#if UIP_CONF_LL_802154
-#define uip_is_addr_mac_addr_based(a, m) \
- ((((a)->u8[8]) == (((m)->addr[0]) ^ 0x02)) && \
- (((a)->u8[9]) == (m)->addr[1]) && \
- (((a)->u8[10]) == (m)->addr[2]) && \
- (((a)->u8[11]) == (m)->addr[3]) && \
- (((a)->u8[12]) == (m)->addr[4]) && \
- (((a)->u8[13]) == (m)->addr[5]) && \
- (((a)->u8[14]) == (m)->addr[6]) && \
- (((a)->u8[15]) == (m)->addr[7]))
-#else
-
-#define uip_is_addr_mac_addr_based(a, m) \
- ((((a)->u8[8]) == (((m)->addr[0]) | 0x02)) && \
- (((a)->u8[9]) == (m)->addr[1]) && \
- (((a)->u8[10]) == (m)->addr[2]) && \
- (((a)->u8[11]) == 0xff) && \
- (((a)->u8[12]) == 0xfe) && \
- (((a)->u8[13]) == (m)->addr[3]) && \
- (((a)->u8[14]) == (m)->addr[4]) && \
- (((a)->u8[15]) == (m)->addr[5]))
-
-#endif /*UIP_CONF_LL_802154*/
-
-/**
- * \brief is address a multicast address, see RFC 3513
- * a is of type uip_ipaddr_t*
- * */
-#define uip_is_addr_mcast(a) \
- (((a)->u8[0]) == 0xFF)
-
-/**
- * \brief is group-id of multicast address a
- * the all nodes group-id
- */
-#define uip_is_mcast_group_id_all_nodes(a) \
- ((((a)->u16[1]) == 0) && \
- (((a)->u16[2]) == 0) && \
- (((a)->u16[3]) == 0) && \
- (((a)->u16[4]) == 0) && \
- (((a)->u16[5]) == 0) && \
- (((a)->u16[6]) == 0) && \
- (((a)->u8[14]) == 0) && \
- (((a)->u8[15]) == 1))
-
-/**
- * \brief is group-id of multicast address a
- * the all routers group-id
- */
-#define uip_is_mcast_group_id_all_routers(a) \
- ((((a)->u16[1]) == 0) && \
- (((a)->u16[2]) == 0) && \
- (((a)->u16[3]) == 0) && \
- (((a)->u16[4]) == 0) && \
- (((a)->u16[5]) == 0) && \
- (((a)->u16[6]) == 0) && \
- (((a)->u8[14]) == 0) && \
- (((a)->u8[15]) == 2))
-
-
-#endif /*UIP_CONF_IPV6*/
-
-/**
- * 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.
- *
- * \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.
- *
- * \return The TCP checksum of the TCP segment in uip_buf and pointed
- * to by uip_appdata.
- */
-u16_t uip_tcpchksum(void);
-
-/**
- * Calculate the UDP checksum of the packet in uip_buf and uip_appdata.
- *
- * The UDP checksum is the Internet checksum of data contents of the
- * UDP segment, and a pseudo-header as defined in RFC768.
- *
- * \return The UDP checksum of the UDP segment in uip_buf and pointed
- * to by uip_appdata.
- */
-u16_t uip_udpchksum(void);
-
-/**
- * Calculate the ICMP checksum of the packet in uip_buf.
- *
- * \return The ICMP checksum of the ICMP packet in uip_buf
- */
-u16_t uip_icmp6chksum(void);
-
-
-#endif /* __UIP_H__ */
-
-
-/** @} */
+
+/**
+ * \addtogroup uip
+ * @{
+ */
+
+/**
+ * \file
+ * Header file for the uIP TCP/IP stack.
+ * \author Adam Dunkels <adam@dunkels.com>
+ * \author Julien Abeille <jabeille@cisco.com> (IPv6 related code)
+ * \author Mathilde Durvy <mdurvy@cisco.com> (IPv6 related code)
+ *
+ * The uIP TCP/IP stack header file contains definitions for a number
+ * of C macros that are used by uIP programs as well as internal uIP
+ * structures, TCP/IP header structures and function declarations.
+ *
+ */
+
+/*
+ * 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.h,v 1.24 2009/04/06 13:18:50 nvt-se Exp $
+ *
+ */
+
+#ifndef __UIP_H__
+#define __UIP_H__
+
+#include "uipopt.h"
+
+/**
+ * Representation of an IP address.
+ *
+ */
+#if UIP_CONF_IPV6
+typedef union uip_ip6addr_t {
+ u8_t u8[16]; /* Initializer, must come first!!! */
+ u16_t u16[8];
+} uip_ip6addr_t;
+
+typedef uip_ip6addr_t uip_ipaddr_t;
+#else /* UIP_CONF_IPV6 */
+typedef union uip_ip4addr_t {
+ u8_t u8[4]; /* Initializer, must come first!!! */
+ u16_t u16[2];
+#if 0
+ u32_t u32;
+#endif
+} uip_ip4addr_t;
+typedef uip_ip4addr_t uip_ipaddr_t;
+#endif /* UIP_CONF_IPV6 */
+
+
+/*---------------------------------------------------------------------------*/
+
+/** \brief 16 bit 802.15.4 address */
+struct uip_802154_shortaddr {
+ u8_t addr[2];
+};
+/** \brief 64 bit 802.15.4 address */
+struct uip_802154_longaddr {
+ u8_t addr[8];
+};
+
+/** \brief 802.11 address */
+struct uip_80211_addr {
+ u8_t addr[6];
+};
+
+/** \brief 802.3 address */
+struct uip_eth_addr {
+ u8_t addr[6];
+};
+
+#if UIP_CONF_LL_802154
+/** \brief 802.15.4 address */
+typedef struct uip_802154_longaddr uip_lladdr_t;
+#define UIP_802154_SHORTADDR_LEN 2
+#define UIP_802154_LONGADDR_LEN 8
+#define UIP_LLADDR_LEN UIP_802154_LONGADDR_LEN
+#else /*UIP_CONF_LL_802154*/
+#if UIP_CONF_LL_80211
+/** \brief 802.11 address */
+typedef struct uip_80211_addr uip_lladdr_t;
+#define UIP_LLADDR_LEN 6
+#else /*UIP_CONF_LL_80211*/
+/** \brief Ethernet address */
+typedef struct uip_eth_addr uip_lladdr_t;
+#define UIP_LLADDR_LEN 6
+#endif /*UIP_CONF_LL_80211*/
+#endif /*UIP_CONF_LL_802154*/
+
+/*---------------------------------------------------------------------------*/
+/* First, the functions that should be called from the
+ * system. Initialization, the periodic timer, and incoming packets are
+ * handled by the following three functions.
+ */
+/**
+ * \defgroup uipconffunc uIP configuration functions
+ * @{
+ *
+ * The uIP configuration functions are used for setting run-time
+ * parameters in uIP such as IP addresses.
+ */
+
+/**
+ * Set the IP address of this host.
+ *
+ * The IP address is represented as a 4-byte array where the first
+ * octet of the IP address is put in the first member of the 4-byte
+ * array.
+ *
+ * Example:
+ \code
+
+ uip_ipaddr_t addr;
+
+ uip_ipaddr(&addr, 192,168,1,2);
+ uip_sethostaddr(&addr);
+
+ \endcode
+ * \param addr A pointer to an IP address of type uip_ipaddr_t;
+ *
+ * \sa uip_ipaddr()
+ *
+ * \hideinitializer
+ */
+#define uip_sethostaddr(addr) uip_ipaddr_copy(&uip_hostaddr, (addr))
+
+/**
+ * Get the IP address of this host.
+ *
+ * The IP address is represented as a 4-byte array where the first
+ * octet of the IP address is put in the first member of the 4-byte
+ * array.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t hostaddr;
+
+ uip_gethostaddr(&hostaddr);
+ \endcode
+ * \param addr A pointer to a uip_ipaddr_t variable that will be
+ * filled in with the currently configured IP address.
+ *
+ * \hideinitializer
+ */
+#define uip_gethostaddr(addr) uip_ipaddr_copy((addr), &uip_hostaddr)
+
+/**
+ * Set the default router's IP address.
+ *
+ * \param addr A pointer to a uip_ipaddr_t variable containing the IP
+ * address of the default router.
+ *
+ * \sa uip_ipaddr()
+ *
+ * \hideinitializer
+ */
+#define uip_setdraddr(addr) uip_ipaddr_copy(&uip_draddr, (addr))
+
+/**
+ * Set the netmask.
+ *
+ * \param addr A pointer to a uip_ipaddr_t variable containing the IP
+ * address of the netmask.
+ *
+ * \sa uip_ipaddr()
+ *
+ * \hideinitializer
+ */
+#define uip_setnetmask(addr) uip_ipaddr_copy(&uip_netmask, (addr))
+
+
+/**
+ * Get the default router's IP address.
+ *
+ * \param addr A pointer to a uip_ipaddr_t variable that will be
+ * filled in with the IP address of the default router.
+ *
+ * \hideinitializer
+ */
+#define uip_getdraddr(addr) uip_ipaddr_copy((addr), &uip_draddr)
+
+/**
+ * Get the netmask.
+ *
+ * \param addr A pointer to a uip_ipaddr_t variable that will be
+ * filled in with the value of the netmask.
+ *
+ * \hideinitializer
+ */
+#define uip_getnetmask(addr) uip_ipaddr_copy((addr), &uip_netmask)
+
+/** @} */
+
+/**
+ * \defgroup uipinit uIP initialization functions
+ * @{
+ *
+ * The uIP initialization functions are used for booting uIP.
+ */
+
+/**
+ * uIP initialization function.
+ *
+ * This function should be called at boot up to initilize the uIP
+ * TCP/IP stack.
+ */
+void uip_init(void);
+
+/**
+ * uIP initialization function.
+ *
+ * This function may be used at boot time to set the initial ip_id.
+ */
+void uip_setipid(u16_t id);
+
+/** @} */
+
+/**
+ * \defgroup uipdevfunc uIP device driver functions
+ * @{
+ *
+ * These functions are used by a network device driver for interacting
+ * with uIP.
+ */
+
+/**
+ * Process an incoming packet.
+ *
+ * This function should be called when the device driver has received
+ * a packet from the network. The packet from the device driver must
+ * be present in the uip_buf buffer, and the length of the packet
+ * should be placed in the uip_len variable.
+ *
+ * When the function returns, there may be an outbound packet placed
+ * in the uip_buf packet buffer. If so, the uip_len variable is set to
+ * the length of the packet. If no packet is to be sent out, the
+ * uip_len variable is set to 0.
+ *
+ * The usual way of calling the function is presented by the source
+ * code below.
+ \code
+ uip_len = devicedriver_poll();
+ if(uip_len > 0) {
+ uip_input();
+ if(uip_len > 0) {
+ devicedriver_send();
+ }
+ }
+ \endcode
+ *
+ * \note If you are writing a uIP device driver that needs ARP
+ * (Address Resolution Protocol), e.g., when running uIP over
+ * Ethernet, you will need to call the uIP ARP code before calling
+ * this function:
+ \code
+ #define BUF ((struct uip_eth_hdr *)&uip_buf[0])
+ uip_len = ethernet_devicedrver_poll();
+ if(uip_len > 0) {
+ if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
+ uip_arp_ipin();
+ uip_input();
+ if(uip_len > 0) {
+ uip_arp_out();
+ ethernet_devicedriver_send();
+ }
+ } else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
+ uip_arp_arpin();
+ if(uip_len > 0) {
+ ethernet_devicedriver_send();
+ }
+ }
+ \endcode
+ *
+ * \hideinitializer
+ */
+#define uip_input() uip_process(UIP_DATA)
+
+
+/**
+ * Periodic processing for a connection identified by its number.
+ *
+ * This function does the necessary periodic processing (timers,
+ * polling) for a uIP TCP conneciton, and should be called when the
+ * periodic uIP timer goes off. It should be called for every
+ * connection, regardless of whether they are open of closed.
+ *
+ * When the function returns, it may have an outbound packet waiting
+ * for service in the uIP packet buffer, and if so the uip_len
+ * variable is set to a value larger than zero. The device driver
+ * should be called to send out the packet.
+ *
+ * The usual way of calling the function is through a for() loop like
+ * this:
+ \code
+ for(i = 0; i < UIP_CONNS; ++i) {
+ uip_periodic(i);
+ if(uip_len > 0) {
+ devicedriver_send();
+ }
+ }
+ \endcode
+ *
+ * \note If you are writing a uIP device driver that needs ARP
+ * (Address Resolution Protocol), e.g., when running uIP over
+ * Ethernet, you will need to call the uip_arp_out() function before
+ * calling the device driver:
+ \code
+ for(i = 0; i < UIP_CONNS; ++i) {
+ uip_periodic(i);
+ if(uip_len > 0) {
+ uip_arp_out();
+ ethernet_devicedriver_send();
+ }
+ }
+ \endcode
+ *
+ * \param conn The number of the connection which is to be periodically polled.
+ *
+ * \hideinitializer
+ */
+#if UIP_TCP
+#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \
+ uip_process(UIP_TIMER); } while (0)
+
+/**
+ *
+ *
+ */
+#define uip_conn_active(conn) (uip_conns[conn].tcpstateflags != UIP_CLOSED)
+
+/**
+ * Perform periodic processing for a connection identified by a pointer
+ * to its structure.
+ *
+ * Same as uip_periodic() but takes a pointer to the actual uip_conn
+ * struct instead of an integer as its argument. This function can be
+ * used to force periodic processing of a specific connection.
+ *
+ * \param conn A pointer to the uip_conn struct for the connection to
+ * be processed.
+ *
+ * \hideinitializer
+ */
+#define uip_periodic_conn(conn) do { uip_conn = conn; \
+ uip_process(UIP_TIMER); } while (0)
+
+/**
+ * Request that a particular connection should be polled.
+ *
+ * Similar to uip_periodic_conn() but does not perform any timer
+ * processing. The application is polled for new data.
+ *
+ * \param conn A pointer to the uip_conn struct for the connection to
+ * be processed.
+ *
+ * \hideinitializer
+ */
+#define uip_poll_conn(conn) do { uip_conn = conn; \
+ uip_process(UIP_POLL_REQUEST); } while (0)
+
+#endif /* UIP_TCP */
+
+#if UIP_UDP
+/**
+ * Periodic processing for a UDP connection identified by its number.
+ *
+ * This function is essentially the same as uip_periodic(), but for
+ * UDP connections. It is called in a similar fashion as the
+ * uip_periodic() function:
+ \code
+ for(i = 0; i < UIP_UDP_CONNS; i++) {
+ uip_udp_periodic(i);
+ if(uip_len > 0) {
+ devicedriver_send();
+ }
+ }
+ \endcode
+ *
+ * \note As for the uip_periodic() function, special care has to be
+ * taken when using uIP together with ARP and Ethernet:
+ \code
+ for(i = 0; i < UIP_UDP_CONNS; i++) {
+ uip_udp_periodic(i);
+ if(uip_len > 0) {
+ uip_arp_out();
+ ethernet_devicedriver_send();
+ }
+ }
+ \endcode
+ *
+ * \param conn The number of the UDP connection to be processed.
+ *
+ * \hideinitializer
+ */
+#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \
+ uip_process(UIP_UDP_TIMER); } while(0)
+
+/**
+ * Periodic processing for a UDP connection identified by a pointer to
+ * its structure.
+ *
+ * Same as uip_udp_periodic() but takes a pointer to the actual
+ * uip_conn struct instead of an integer as its argument. This
+ * function can be used to force periodic processing of a specific
+ * connection.
+ *
+ * \param conn A pointer to the uip_udp_conn struct for the connection
+ * to be processed.
+ *
+ * \hideinitializer
+ */
+#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \
+ uip_process(UIP_UDP_TIMER); } while(0)
+#endif /* UIP_UDP */
+
+/** \brief Abandon the reassembly of the current packet */
+void uip_reass_over(void);
+
+/**
+ * The uIP packet buffer.
+ *
+ * The uip_buf array is used to hold incoming and outgoing
+ * packets. The device driver should place incoming data into this
+ * buffer. When sending data, the device driver should read the link
+ * level headers and the TCP/IP headers from this buffer. The size of
+ * the link level headers is configured by the UIP_LLH_LEN define.
+ *
+ * \note The application data need not be placed in this buffer, so
+ * the device driver must read it from the place pointed to by the
+ * uip_appdata pointer as illustrated by the following example:
+ \code
+ void
+ devicedriver_send(void)
+ {
+ hwsend(&uip_buf[0], UIP_LLH_LEN);
+ if(uip_len <= UIP_LLH_LEN + UIP_TCPIP_HLEN) {
+ hwsend(&uip_buf[UIP_LLH_LEN], uip_len - UIP_LLH_LEN);
+ } else {
+ hwsend(&uip_buf[UIP_LLH_LEN], UIP_TCPIP_HLEN);
+ hwsend(uip_appdata, uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN);
+ }
+ }
+ \endcode
+*/
+extern u8_t uip_buf[UIP_BUFSIZE+2];
+
+
+
+/** @} */
+
+/*---------------------------------------------------------------------------*/
+/* Functions that are used by the uIP application program. Opening and
+ * closing connections, sending and receiving data, etc. is all
+ * handled by the functions below.
+ */
+/**
+ * \defgroup uipappfunc uIP application functions
+ * @{
+ *
+ * Functions used by an application running of top of uIP.
+ */
+
+/**
+ * Start listening to the specified port.
+ *
+ * \note Since this function expects the port number in network byte
+ * order, a conversion using HTONS() or htons() is necessary.
+ *
+ \code
+ uip_listen(HTONS(80));
+ \endcode
+ *
+ * \param port A 16-bit port number in network byte order.
+ */
+void uip_listen(u16_t port);
+
+/**
+ * Stop listening to the specified port.
+ *
+ * \note Since this function expects the port number in network byte
+ * order, a conversion using HTONS() or htons() is necessary.
+ *
+ \code
+ uip_unlisten(HTONS(80));
+ \endcode
+ *
+ * \param port A 16-bit port number in network byte order.
+ */
+void uip_unlisten(u16_t port);
+
+/**
+ * Connect to a remote host using TCP.
+ *
+ * This function is used to start a new connection to the specified
+ * port on the specified host. It allocates a new connection identifier,
+ * sets the connection to the SYN_SENT state and sets the
+ * retransmission timer to 0. This will cause a TCP SYN segment to be
+ * sent out the next time this connection is periodically processed,
+ * which usually is done within 0.5 seconds after the call to
+ * uip_connect().
+ *
+ * \note This function is available only if support for active open
+ * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h.
+ *
+ * \note Since this function requires the port number to be in network
+ * byte order, a conversion using HTONS() or htons() is necessary.
+ *
+ \code
+ uip_ipaddr_t ipaddr;
+
+ uip_ipaddr(&ipaddr, 192,168,1,2);
+ uip_connect(&ipaddr, HTONS(80));
+ \endcode
+ *
+ * \param ripaddr The IP address of the remote host.
+ *
+ * \param port A 16-bit port number in network byte order.
+ *
+ * \return A pointer to the uIP connection identifier for the new connection,
+ * or NULL if no connection could be allocated.
+ *
+ */
+struct uip_conn *uip_connect(uip_ipaddr_t *ripaddr, u16_t port);
+
+
+
+/**
+ * \internal
+ *
+ * Check if a connection has outstanding (i.e., unacknowledged) data.
+ *
+ * \param conn A pointer to the uip_conn structure for the connection.
+ *
+ * \hideinitializer
+ */
+#define uip_outstanding(conn) ((conn)->len)
+
+/**
+ * Send data on the current connection.
+ *
+ * This function is used to send out a single segment of TCP
+ * data. Only applications that have been invoked by uIP for event
+ * processing can send data.
+ *
+ * The amount of data that actually is sent out after a call to this
+ * function is determined by the maximum amount of data TCP allows. uIP
+ * will automatically crop the data so that only the appropriate
+ * amount of data is sent. The function uip_mss() can be used to query
+ * uIP for the amount of data that actually will be sent.
+ *
+ * \note This function does not guarantee that the sent data will
+ * arrive at the destination. If the data is lost in the network, the
+ * application will be invoked with the uip_rexmit() event being
+ * set. The application will then have to resend the data using this
+ * function.
+ *
+ * \param data A pointer to the data which is to be sent.
+ *
+ * \param len The maximum amount of data bytes to be sent.
+ *
+ * \hideinitializer
+ */
+void uip_send(const void *data, int len);
+
+/**
+ * The length of any incoming data that is currently available (if available)
+ * in the uip_appdata buffer.
+ *
+ * The test function uip_data() must first be used to check if there
+ * is any data available at all.
+ *
+ * \hideinitializer
+ */
+/*void uip_datalen(void);*/
+#define uip_datalen() uip_len
+
+/**
+ * The length of any out-of-band data (urgent data) that has arrived
+ * on the connection.
+ *
+ * \note The configuration parameter UIP_URGDATA must be set for this
+ * function to be enabled.
+ *
+ * \hideinitializer
+ */
+#define uip_urgdatalen() uip_urglen
+
+/**
+ * Close the current connection.
+ *
+ * This function will close the current connection in a nice way.
+ *
+ * \hideinitializer
+ */
+#define uip_close() (uip_flags = UIP_CLOSE)
+
+/**
+ * Abort the current connection.
+ *
+ * This function will abort (reset) the current connection, and is
+ * usually used when an error has occurred that prevents using the
+ * uip_close() function.
+ *
+ * \hideinitializer
+ */
+#define uip_abort() (uip_flags = UIP_ABORT)
+
+/**
+ * Tell the sending host to stop sending data.
+ *
+ * This function will close our receiver's window so that we stop
+ * receiving data for the current connection.
+ *
+ * \hideinitializer
+ */
+#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
+
+/**
+ * Find out if the current connection has been previously stopped with
+ * uip_stop().
+ *
+ * \hideinitializer
+ */
+#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED)
+
+/**
+ * Restart the current connection, if is has previously been stopped
+ * with uip_stop().
+ *
+ * This function will open the receiver's window again so that we
+ * start receiving data for the current connection.
+ *
+ * \hideinitializer
+ */
+#define uip_restart() do { uip_flags |= UIP_NEWDATA; \
+ uip_conn->tcpstateflags &= ~UIP_STOPPED; \
+ } while(0)
+
+
+/* uIP tests that can be made to determine in what state the current
+ connection is, and what the application function should do. */
+
+/**
+ * Is the current connection a UDP connection?
+ *
+ * This function checks whether the current connection is a UDP connection.
+ *
+ * \hideinitializer
+ *
+ */
+#define uip_udpconnection() (uip_conn == NULL)
+
+/**
+ * Is new incoming data available?
+ *
+ * Will reduce to non-zero if there is new data for the application
+ * present at the uip_appdata pointer. The size of the data is
+ * available through the uip_len variable.
+ *
+ * \hideinitializer
+ */
+#define uip_newdata() (uip_flags & UIP_NEWDATA)
+
+/**
+ * Has previously sent data been acknowledged?
+ *
+ * Will reduce to non-zero if the previously sent data has been
+ * acknowledged by the remote host. This means that the application
+ * can send new data.
+ *
+ * \hideinitializer
+ */
+#define uip_acked() (uip_flags & UIP_ACKDATA)
+
+/**
+ * Has the connection just been connected?
+ *
+ * Reduces to non-zero if the current connection has been connected to
+ * a remote host. This will happen both if the connection has been
+ * actively opened (with uip_connect()) or passively opened (with
+ * uip_listen()).
+ *
+ * \hideinitializer
+ */
+#define uip_connected() (uip_flags & UIP_CONNECTED)
+
+/**
+ * Has the connection been closed by the other end?
+ *
+ * Is non-zero if the connection has been closed by the remote
+ * host. The application may then do the necessary clean-ups.
+ *
+ * \hideinitializer
+ */
+#define uip_closed() (uip_flags & UIP_CLOSE)
+
+/**
+ * Has the connection been aborted by the other end?
+ *
+ * Non-zero if the current connection has been aborted (reset) by the
+ * remote host.
+ *
+ * \hideinitializer
+ */
+#define uip_aborted() (uip_flags & UIP_ABORT)
+
+/**
+ * Has the connection timed out?
+ *
+ * Non-zero if the current connection has been aborted due to too many
+ * retransmissions.
+ *
+ * \hideinitializer
+ */
+#define uip_timedout() (uip_flags & UIP_TIMEDOUT)
+
+/**
+ * Do we need to retransmit previously data?
+ *
+ * Reduces to non-zero if the previously sent data has been lost in
+ * the network, and the application should retransmit it. The
+ * application should send the exact same data as it did the last
+ * time, using the uip_send() function.
+ *
+ * \hideinitializer
+ */
+#define uip_rexmit() (uip_flags & UIP_REXMIT)
+
+/**
+ * Is the connection being polled by uIP?
+ *
+ * Is non-zero if the reason the application is invoked is that the
+ * current connection has been idle for a while and should be
+ * polled.
+ *
+ * The polling event can be used for sending data without having to
+ * wait for the remote host to send data.
+ *
+ * \hideinitializer
+ */
+#define uip_poll() (uip_flags & UIP_POLL)
+
+/**
+ * Get the initial maximum segment size (MSS) of the current
+ * connection.
+ *
+ * \hideinitializer
+ */
+#define uip_initialmss() (uip_conn->initialmss)
+
+/**
+ * Get the current maximum segment size that can be sent on the current
+ * connection.
+ *
+ * The current maximum segment size that can be sent on the
+ * connection is computed from the receiver's window and the MSS of
+ * the connection (which also is available by calling
+ * uip_initialmss()).
+ *
+ * \hideinitializer
+ */
+#define uip_mss() (uip_conn->mss)
+
+/**
+ * Set up a new UDP connection.
+ *
+ * This function sets up a new UDP connection. The function will
+ * automatically allocate an unused local port for the new
+ * connection. However, another port can be chosen by using the
+ * uip_udp_bind() call, after the uip_udp_new() function has been
+ * called.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t addr;
+ struct uip_udp_conn *c;
+
+ uip_ipaddr(&addr, 192,168,2,1);
+ c = uip_udp_new(&addr, HTONS(12345));
+ if(c != NULL) {
+ uip_udp_bind(c, HTONS(12344));
+ }
+ \endcode
+ * \param ripaddr The IP address of the remote host.
+ *
+ * \param rport The remote port number in network byte order.
+ *
+ * \return The uip_udp_conn structure for the new connection or NULL
+ * if no connection could be allocated.
+ */
+struct uip_udp_conn *uip_udp_new(const uip_ipaddr_t *ripaddr, u16_t rport);
+
+/**
+ * Removed a UDP connection.
+ *
+ * \param conn A pointer to the uip_udp_conn structure for the connection.
+ *
+ * \hideinitializer
+ */
+#define uip_udp_remove(conn) (conn)->lport = 0
+
+/**
+ * Bind a UDP connection to a local port.
+ *
+ * \param conn A pointer to the uip_udp_conn structure for the
+ * connection.
+ *
+ * \param port The local port number, in network byte order.
+ *
+ * \hideinitializer
+ */
+#define uip_udp_bind(conn, port) (conn)->lport = port
+
+/**
+ * Send a UDP datagram of length len on the current connection.
+ *
+ * This function can only be called in response to a UDP event (poll
+ * or newdata). The data must be present in the uip_buf buffer, at the
+ * place pointed to by the uip_appdata pointer.
+ *
+ * \param len The length of the data in the uip_buf buffer.
+ *
+ * \hideinitializer
+ */
+#define uip_udp_send(len) uip_send((char *)uip_appdata, len)
+
+/** @} */
+
+/* uIP convenience and converting functions. */
+
+/**
+ * \defgroup uipconvfunc uIP conversion functions
+ * @{
+ *
+ * These functions can be used for converting between different data
+ * formats used by uIP.
+ */
+
+/**
+ * Convert an IP address to four bytes separated by commas.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr;
+ printf("ipaddr=%d.%d.%d.%d\n", uip_ipaddr_to_quad(&ipaddr));
+ \endcode
+ *
+ * \param a A pointer to a uip_ipaddr_t.
+ * \hideinitializer
+ */
+#define uip_ipaddr_to_quad(a) (a)->u8[0],(a)->u8[1],(a)->u8[2],(a)->u8[3]
+
+/**
+ * Construct an IP address from four bytes.
+ *
+ * This function constructs an IP address of the type that uIP handles
+ * internally from four bytes. The function is handy for specifying IP
+ * addresses to use with e.g. the uip_connect() function.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr;
+ struct uip_conn *c;
+
+ uip_ipaddr(&ipaddr, 192,168,1,2);
+ c = uip_connect(&ipaddr, HTONS(80));
+ \endcode
+ *
+ * \param addr A pointer to a uip_ipaddr_t variable that will be
+ * filled in with the IP address.
+ *
+ * \param addr0 The first octet of the IP address.
+ * \param addr1 The second octet of the IP address.
+ * \param addr2 The third octet of the IP address.
+ * \param addr3 The forth octet of the IP address.
+ *
+ * \hideinitializer
+ */
+#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
+ (addr)->u8[0] = addr0; \
+ (addr)->u8[1] = addr1; \
+ (addr)->u8[2] = addr2; \
+ (addr)->u8[3] = addr3; \
+ } while(0)
+
+/**
+ * Construct an IPv6 address from eight 16-bit words.
+ *
+ * This function constructs an IPv6 address.
+ *
+ * \hideinitializer
+ */
+#define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \
+ (addr)->u16[0] = HTONS(addr0); \
+ (addr)->u16[1] = HTONS(addr1); \
+ (addr)->u16[2] = HTONS(addr2); \
+ (addr)->u16[3] = HTONS(addr3); \
+ (addr)->u16[4] = HTONS(addr4); \
+ (addr)->u16[5] = HTONS(addr5); \
+ (addr)->u16[6] = HTONS(addr6); \
+ (addr)->u16[7] = HTONS(addr7); \
+ } while(0)
+
+/**
+ * Construct an IPv6 address from eight 8-bit words.
+ *
+ * This function constructs an IPv6 address.
+ *
+ * \hideinitializer
+ */
+#define uip_ip6addr_u8(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7,addr8,addr9,addr10,addr11,addr12,addr13,addr14,addr15) do { \
+ (addr)->u8[0] = addr0; \
+ (addr)->u8[1] = addr1; \
+ (addr)->u8[2] = addr2; \
+ (addr)->u8[3] = addr3; \
+ (addr)->u8[4] = addr4; \
+ (addr)->u8[5] = addr5; \
+ (addr)->u8[6] = addr6; \
+ (addr)->u8[7] = addr7; \
+ (addr)->u8[8] = addr8; \
+ (addr)->u8[9] = addr9; \
+ (addr)->u8[10] = addr10; \
+ (addr)->u8[11] = addr11; \
+ (addr)->u8[12] = addr12; \
+ (addr)->u8[13] = addr13; \
+ (addr)->u8[14] = addr14; \
+ (addr)->u8[15] = addr15; \
+ } while(0)
+
+
+/**
+ * Copy an IP address to another IP address.
+ *
+ * Copies an IP address from one place to another.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr1, ipaddr2;
+
+ uip_ipaddr(&ipaddr1, 192,16,1,2);
+ uip_ipaddr_copy(&ipaddr2, &ipaddr1);
+ \endcode
+ *
+ * \param dest The destination for the copy.
+ * \param src The source from where to copy.
+ *
+ * \hideinitializer
+ */
+#ifndef uip_ipaddr_copy
+#define uip_ipaddr_copy(dest, src) (*(dest) = *(src))
+#endif
+
+/**
+ * Compare two IP addresses
+ *
+ * Compares two IP addresses.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr1, ipaddr2;
+
+ uip_ipaddr(&ipaddr1, 192,16,1,2);
+ if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) {
+ printf("They are the same");
+ }
+ \endcode
+ *
+ * \param addr1 The first IP address.
+ * \param addr2 The second IP address.
+ *
+ * \hideinitializer
+ */
+#if !UIP_CONF_IPV6
+#define uip_ipaddr_cmp(addr1, addr2) ((addr1)->u16[0] == (addr2)->u16[0] && \
+ (addr1)->u16[1] == (addr2)->u16[1])
+#else /* !UIP_CONF_IPV6 */
+#define uip_ipaddr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0)
+#endif /* !UIP_CONF_IPV6 */
+
+/**
+ * Compare two IP addresses with netmasks
+ *
+ * Compares two IP addresses with netmasks. The masks are used to mask
+ * out the bits that are to be compared.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr1, ipaddr2, mask;
+
+ uip_ipaddr(&mask, 255,255,255,0);
+ uip_ipaddr(&ipaddr1, 192,16,1,2);
+ uip_ipaddr(&ipaddr2, 192,16,1,3);
+ if(uip_ipaddr_maskcmp(&ipaddr1, &ipaddr2, &mask)) {
+ printf("They are the same");
+ }
+ \endcode
+ *
+ * \param addr1 The first IP address.
+ * \param addr2 The second IP address.
+ * \param mask The netmask.
+ *
+ * \hideinitializer
+ */
+#if !UIP_CONF_IPV6
+#define uip_ipaddr_maskcmp(addr1, addr2, mask) \
+ (((((u16_t *)addr1)[0] & ((u16_t *)mask)[0]) == \
+ (((u16_t *)addr2)[0] & ((u16_t *)mask)[0])) && \
+ ((((u16_t *)addr1)[1] & ((u16_t *)mask)[1]) == \
+ (((u16_t *)addr2)[1] & ((u16_t *)mask)[1])))
+#else
+#define uip_ipaddr_prefixcmp(addr1, addr2, length) (memcmp(addr1, addr2, length>>3) == 0)
+#endif
+
+
+/**
+ * Check if an address is a broadcast address for a network.
+ *
+ * Checks if an address is the broadcast address for a network. The
+ * network is defined by an IP address that is on the network and the
+ * network's netmask.
+ *
+ * \param addr The IP address.
+ * \param netaddr The network's IP address.
+ * \param netmask The network's netmask.
+ *
+ * \hideinitializer
+ */
+/*#define uip_ipaddr_isbroadcast(addr, netaddr, netmask)
+ ((uip_ipaddr_t *)(addr)).u16 & ((uip_ipaddr_t *)(addr)).u16*/
+
+
+
+/**
+ * Mask out the network part of an IP address.
+ *
+ * Masks out the network part of an IP address, given the address and
+ * the netmask.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr1, ipaddr2, netmask;
+
+ uip_ipaddr(&ipaddr1, 192,16,1,2);
+ uip_ipaddr(&netmask, 255,255,255,0);
+ uip_ipaddr_mask(&ipaddr2, &ipaddr1, &netmask);
+ \endcode
+ *
+ * In the example above, the variable "ipaddr2" will contain the IP
+ * address 192.168.1.0.
+ *
+ * \param dest Where the result is to be placed.
+ * \param src The IP address.
+ * \param mask The netmask.
+ *
+ * \hideinitializer
+ */
+#define uip_ipaddr_mask(dest, src, mask) do { \
+ ((u16_t *)dest)[0] = ((u16_t *)src)[0] & ((u16_t *)mask)[0]; \
+ ((u16_t *)dest)[1] = ((u16_t *)src)[1] & ((u16_t *)mask)[1]; \
+ } while(0)
+
+/**
+ * Pick the first octet of an IP address.
+ *
+ * Picks out the first octet of an IP address.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr;
+ u8_t octet;
+
+ uip_ipaddr(&ipaddr, 1,2,3,4);
+ octet = uip_ipaddr1(&ipaddr);
+ \endcode
+ *
+ * In the example above, the variable "octet" will contain the value 1.
+ *
+ * \hideinitializer
+ */
+#define uip_ipaddr1(addr) ((addr)->u8[0])
+
+/**
+ * Pick the second octet of an IP address.
+ *
+ * Picks out the second octet of an IP address.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr;
+ u8_t octet;
+
+ uip_ipaddr(&ipaddr, 1,2,3,4);
+ octet = uip_ipaddr2(&ipaddr);
+ \endcode
+ *
+ * In the example above, the variable "octet" will contain the value 2.
+ *
+ * \hideinitializer
+ */
+#define uip_ipaddr2(addr) ((addr)->u8[1])
+
+/**
+ * Pick the third octet of an IP address.
+ *
+ * Picks out the third octet of an IP address.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr;
+ u8_t octet;
+
+ uip_ipaddr(&ipaddr, 1,2,3,4);
+ octet = uip_ipaddr3(&ipaddr);
+ \endcode
+ *
+ * In the example above, the variable "octet" will contain the value 3.
+ *
+ * \hideinitializer
+ */
+#define uip_ipaddr3(addr) ((addr)->u8[2])
+
+/**
+ * Pick the fourth octet of an IP address.
+ *
+ * Picks out the fourth octet of an IP address.
+ *
+ * Example:
+ \code
+ uip_ipaddr_t ipaddr;
+ u8_t octet;
+
+ uip_ipaddr(&ipaddr, 1,2,3,4);
+ octet = uip_ipaddr4(&ipaddr);
+ \endcode
+ *
+ * In the example above, the variable "octet" will contain the value 4.
+ *
+ * \hideinitializer
+ */
+#define uip_ipaddr4(addr) ((addr)->u8[3])
+
+/**
+ * Convert 16-bit quantity from host byte order to network byte order.
+ *
+ * This macro is primarily used for converting constants from host
+ * byte order to network byte order. For converting variables to
+ * network byte order, use the htons() function instead.
+ *
+ * \hideinitializer
+ */
+#ifndef HTONS
+# if UIP_BYTE_ORDER == UIP_BIG_ENDIAN
+# define HTONS(n) (n)
+# define HTONL(n) (n)
+# else /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */
+# define HTONS(n) (u16_t)((((u16_t) (n)) << 8) | (((u16_t) (n)) >> 8))
+# define HTONL(n) (((u32_t)HTONS(n) << 16) | HTONS((u32_t)(n) >> 16))
+# endif /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */
+#else
+#error "HTONS already defined!"
+#endif /* HTONS */
+
+/**
+ * Convert 16-bit quantity from host byte order to network byte order.
+ *
+ * This function is primarily used for converting variables from host
+ * byte order to network byte order. For converting constants to
+ * network byte order, use the HTONS() macro instead.
+ */
+#ifndef htons
+u16_t htons(u16_t val);
+#endif /* htons */
+#ifndef ntohs
+#define ntohs htons
+#endif
+
+#ifndef htonl
+u32_t htonl(u32_t val);
+#endif /* htonl */
+#ifndef ntohl
+#define ntohl htonl
+#endif
+
+/** @} */
+
+/**
+ * Pointer to the application data in the packet buffer.
+ *
+ * This pointer points to the application data when the application is
+ * called. If the application wishes to send data, the application may
+ * use this space to write the data into before calling uip_send().
+ */
+extern void *uip_appdata;
+
+#if UIP_URGDATA > 0
+/* u8_t *uip_urgdata:
+ *
+ * This pointer points to any urgent data that has been received. Only
+ * present if compiled with support for urgent data (UIP_URGDATA).
+ */
+extern void *uip_urgdata;
+#endif /* UIP_URGDATA > 0 */
+
+
+/**
+ * \defgroup uipdrivervars Variables used in uIP device drivers
+ * @{
+ *
+ * uIP has a few global variables that are used in device drivers for
+ * uIP.
+ */
+
+/**
+ * The length of the packet in the uip_buf buffer.
+ *
+ * The global variable uip_len holds the length of the packet in the
+ * uip_buf buffer.
+ *
+ * When the network device driver calls the uIP input function,
+ * uip_len should be set to the length of the packet in the uip_buf
+ * buffer.
+ *
+ * When sending packets, the device driver should use the contents of
+ * the uip_len variable to determine the length of the outgoing
+ * packet.
+ *
+ */
+extern u16_t uip_len;
+
+/**
+ * The length of the extension headers
+ */
+extern u8_t uip_ext_len;
+/** @} */
+
+#if UIP_URGDATA > 0
+extern u16_t uip_urglen, uip_surglen;
+#endif /* UIP_URGDATA > 0 */
+
+
+/**
+ * Representation of a uIP TCP connection.
+ *
+ * The uip_conn structure is used for identifying a connection. All
+ * but one field in the structure are to be considered read-only by an
+ * application. The only exception is the appstate field whose purpose
+ * is to let the application store application-specific state (e.g.,
+ * file pointers) for the connection. The type of this field is
+ * configured in the "uipopt.h" header file.
+ */
+struct uip_conn {
+ uip_ipaddr_t ripaddr; /**< The IP address of the remote host. */
+
+ u16_t lport; /**< The local TCP port, in network byte order. */
+ u16_t rport; /**< The local remote TCP port, in network byte
+ order. */
+
+ u8_t rcv_nxt[4]; /**< The sequence number that we expect to
+ receive next. */
+ u8_t snd_nxt[4]; /**< The sequence number that was last sent by
+ us. */
+ u16_t len; /**< Length of the data that was previously sent. */
+ u16_t mss; /**< Current maximum segment size for the
+ connection. */
+ u16_t initialmss; /**< Initial maximum segment size for the
+ connection. */
+ u8_t sa; /**< Retransmission time-out calculation state
+ variable. */
+ u8_t sv; /**< Retransmission time-out calculation state
+ variable. */
+ u8_t rto; /**< Retransmission time-out. */
+ u8_t tcpstateflags; /**< TCP state and flags. */
+ u8_t timer; /**< The retransmission timer. */
+ u8_t nrtx; /**< The number of retransmissions for the last
+ segment sent. */
+
+ /** The application state. */
+ uip_tcp_appstate_t appstate;
+};
+
+
+/**
+ * Pointer to the current TCP connection.
+ *
+ * The uip_conn pointer can be used to access the current TCP
+ * connection.
+ */
+
+extern struct uip_conn *uip_conn;
+#if UIP_TCP
+/* The array containing all uIP connections. */
+extern struct uip_conn uip_conns[UIP_CONNS];
+#endif
+
+/**
+ * \addtogroup uiparch
+ * @{
+ */
+
+/**
+ * 4-byte array used for the 32-bit sequence number calculations.
+ */
+extern u8_t uip_acc32[4];
+/** @} */
+
+/**
+ * Representation of a uIP UDP connection.
+ */
+struct uip_udp_conn {
+ uip_ipaddr_t ripaddr; /**< The IP address of the remote peer. */
+ u16_t lport; /**< The local port number in network byte order. */
+ u16_t rport; /**< The remote port number in network byte order. */
+ u8_t ttl; /**< Default time-to-live. */
+
+ /** The application state. */
+ uip_udp_appstate_t appstate;
+};
+
+/**
+ * The current UDP connection.
+ */
+extern struct uip_udp_conn *uip_udp_conn;
+extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
+
+struct uip_router {
+ int (*activate)(void);
+ int (*deactivate)(void);
+ uip_ipaddr_t *(*lookup)(uip_ipaddr_t *destipaddr, uip_ipaddr_t *nexthop);
+};
+
+#if UIP_CONF_ROUTER
+extern const struct uip_router *uip_router;
+
+/**
+ * uIP routing driver registration function.
+ */
+void uip_router_register(const struct uip_router *router);
+#endif /*UIP_CONF_ROUTER*/
+
+#if UIP_CONF_ICMP6
+struct uip_icmp6_conn {
+ uip_icmp6_appstate_t appstate;
+};
+extern struct uip_icmp6_conn uip_icmp6_conns;
+#endif /*UIP_CONF_ICMP6*/
+
+/**
+ * The uIP TCP/IP statistics.
+ *
+ * This is the variable in which the uIP TCP/IP statistics are gathered.
+ */
+#if UIP_STATISTICS == 1
+extern struct uip_stats uip_stat;
+#define UIP_STAT(s) s
+#else
+#define UIP_STAT(s)
+#endif /* UIP_STATISTICS == 1 */
+
+/**
+ * The structure holding the TCP/IP statistics that are gathered if
+ * UIP_STATISTICS is set to 1.
+ *
+ */
+struct uip_stats {
+ struct {
+ uip_stats_t recv; /**< Number of received packets at the IP
+ layer. */
+ uip_stats_t sent; /**< Number of sent packets at the IP
+ layer. */
+ uip_stats_t forwarded;/**< Number of forwarded packets at the IP
+ layer. */
+ uip_stats_t drop; /**< Number of dropped packets at the IP
+ layer. */
+ uip_stats_t vhlerr; /**< Number of packets dropped due to wrong
+ IP version or header length. */
+ uip_stats_t hblenerr; /**< Number of packets dropped due to wrong
+ IP length, high byte. */
+ uip_stats_t lblenerr; /**< Number of packets dropped due to wrong
+ IP length, low byte. */
+ uip_stats_t fragerr; /**< Number of packets dropped since they
+ were IP fragments. */
+ uip_stats_t chkerr; /**< Number of packets dropped due to IP
+ checksum errors. */
+ uip_stats_t protoerr; /**< Number of packets dropped since they
+ were neither ICMP, UDP nor TCP. */
+ } ip; /**< IP statistics. */
+ struct {
+ uip_stats_t recv; /**< Number of received ICMP packets. */
+ uip_stats_t sent; /**< Number of sent ICMP packets. */
+ uip_stats_t drop; /**< Number of dropped ICMP packets. */
+ uip_stats_t typeerr; /**< Number of ICMP packets with a wrong
+ type. */
+ uip_stats_t chkerr; /**< Number of ICMP packets with a bad
+ checksum. */
+ } icmp; /**< ICMP statistics. */
+#if UIP_TCP
+ struct {
+ uip_stats_t recv; /**< Number of recived TCP segments. */
+ uip_stats_t sent; /**< Number of sent TCP segments. */
+ uip_stats_t drop; /**< Number of dropped TCP segments. */
+ uip_stats_t chkerr; /**< Number of TCP segments with a bad
+ checksum. */
+ uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK
+ number. */
+ uip_stats_t rst; /**< Number of recevied TCP RST (reset) segments. */
+ uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */
+ uip_stats_t syndrop; /**< Number of dropped SYNs due to too few
+ connections was avaliable. */
+ uip_stats_t synrst; /**< Number of SYNs for closed ports,
+ triggering a RST. */
+ } tcp; /**< TCP statistics. */
+#endif
+#if UIP_UDP
+ struct {
+ uip_stats_t drop; /**< Number of dropped UDP segments. */
+ uip_stats_t recv; /**< Number of recived UDP segments. */
+ uip_stats_t sent; /**< Number of sent UDP segments. */
+ uip_stats_t chkerr; /**< Number of UDP segments with a bad
+ checksum. */
+ } udp; /**< UDP statistics. */
+#endif /* UIP_UDP */
+#if UIP_CONF_IPV6
+ struct {
+ uip_stats_t drop; /**< Number of dropped ND6 packets. */
+ uip_stats_t recv; /**< Number of recived ND6 packets */
+ uip_stats_t sent; /**< Number of sent ND6 packets */
+ } nd6;
+#endif /*UIP_CONF_IPV6*/
+};
+
+
+/*---------------------------------------------------------------------------*/
+/* All the stuff below this point is internal to uIP and should not be
+ * used directly by an application or by a device driver.
+ */
+/*---------------------------------------------------------------------------*/
+
+
+
+/* u8_t uip_flags:
+ *
+ * When the application is called, uip_flags will contain the flags
+ * that are defined in this file. Please read below for more
+ * information.
+ */
+extern u8_t uip_flags;
+
+/* The following flags may be set in the global variable uip_flags
+ before calling the application callback. The UIP_ACKDATA,
+ UIP_NEWDATA, and UIP_CLOSE flags may both be set at the same time,
+ whereas the others are mutually exclusive. Note that these flags
+ should *NOT* be accessed directly, but only through the uIP
+ functions/macros. */
+
+#define UIP_ACKDATA 1 /* Signifies that the outstanding data was
+ acked and the application should send
+ out new data instead of retransmitting
+ the last data. */
+#define UIP_NEWDATA 2 /* Flags the fact that the peer has sent
+ us new data. */
+#define UIP_REXMIT 4 /* Tells the application to retransmit the
+ data that was last sent. */
+#define UIP_POLL 8 /* Used for polling the application, to
+ check if the application has data that
+ it wants to send. */
+#define UIP_CLOSE 16 /* The remote host has closed the
+ connection, thus the connection has
+ gone away. Or the application signals
+ that it wants to close the
+ connection. */
+#define UIP_ABORT 32 /* The remote host has aborted the
+ connection, thus the connection has
+ gone away. Or the application signals
+ that it wants to abort the
+ connection. */
+#define UIP_CONNECTED 64 /* We have got a connection from a remote
+ host and have set up a new connection
+ for it, or an active connection has
+ been successfully established. */
+
+#define UIP_TIMEDOUT 128 /* The connection has been aborted due to
+ too many retransmissions. */
+
+
+/**
+ * \brief process the options within a hop by hop or destination option header
+ * \retval 0: nothing to send,
+ * \retval 1: drop pkt
+ * \retval 2: ICMP error message to send
+*/
+/*static u8_t
+uip_ext_hdr_options_process(); */
+
+/* uip_process(flag):
+ *
+ * The actual uIP function which does all the work.
+ */
+void uip_process(u8_t flag);
+
+ /* The following flags are passed as an argument to the uip_process()
+ function. They are used to distinguish between the two cases where
+ uip_process() is called. It can be called either because we have
+ incoming data that should be processed, or because the periodic
+ timer has fired. These values are never used directly, but only in
+ the macros defined in this file. */
+
+#define UIP_DATA 1 /* Tells uIP that there is incoming
+ data in the uip_buf buffer. The
+ length of the data is stored in the
+ global variable uip_len. */
+#define UIP_TIMER 2 /* Tells uIP that the periodic timer
+ has fired. */
+#define UIP_POLL_REQUEST 3 /* Tells uIP that a connection should
+ be polled. */
+#define UIP_UDP_SEND_CONN 4 /* Tells uIP that a UDP datagram
+ should be constructed in the
+ uip_buf buffer. */
+#if UIP_UDP
+#define UIP_UDP_TIMER 5
+#endif /* UIP_UDP */
+
+/* The TCP states used in the uip_conn->tcpstateflags. */
+#define UIP_CLOSED 0
+#define UIP_SYN_RCVD 1
+#define UIP_SYN_SENT 2
+#define UIP_ESTABLISHED 3
+#define UIP_FIN_WAIT_1 4
+#define UIP_FIN_WAIT_2 5
+#define UIP_CLOSING 6
+#define UIP_TIME_WAIT 7
+#define UIP_LAST_ACK 8
+#define UIP_TS_MASK 15
+
+#define UIP_STOPPED 16
+
+/* The TCP and IP headers. */
+struct uip_tcpip_hdr {
+#if UIP_CONF_IPV6
+ /* IPv6 header. */
+ u8_t vtc,
+ tcflow;
+ u16_t flow;
+ u8_t len[2];
+ u8_t proto, ttl;
+ uip_ip6addr_t srcipaddr, destipaddr;
+#else /* UIP_CONF_IPV6 */
+ /* IPv4 header. */
+ u8_t vhl,
+ tos,
+ len[2],
+ ipid[2],
+ ipoffset[2],
+ ttl,
+ proto;
+ u16_t ipchksum;
+ uip_ipaddr_t srcipaddr, destipaddr;
+#endif /* UIP_CONF_IPV6 */
+
+ /* TCP header. */
+ u16_t srcport,
+ destport;
+ u8_t seqno[4],
+ ackno[4],
+ tcpoffset,
+ flags,
+ wnd[2];
+ u16_t tcpchksum;
+ u8_t urgp[2];
+ u8_t optdata[4];
+};
+
+/* The ICMP and IP headers. */
+struct uip_icmpip_hdr {
+#if UIP_CONF_IPV6
+ /* IPv6 header. */
+ u8_t vtc,
+ tcf;
+ u16_t flow;
+ u8_t len[2];
+ u8_t proto, ttl;
+ uip_ip6addr_t srcipaddr, destipaddr;
+#else /* UIP_CONF_IPV6 */
+ /* IPv4 header. */
+ u8_t vhl,
+ tos,
+ len[2],
+ ipid[2],
+ ipoffset[2],
+ ttl,
+ proto;
+ u16_t ipchksum;
+ uip_ipaddr_t srcipaddr, destipaddr;
+#endif /* UIP_CONF_IPV6 */
+
+ /* ICMP header. */
+ u8_t type, icode;
+ u16_t icmpchksum;
+#if !UIP_CONF_IPV6
+ u16_t id, seqno;
+ u8_t payload[1];
+#endif /* !UIP_CONF_IPV6 */
+};
+
+
+/* The UDP and IP headers. */
+struct uip_udpip_hdr {
+#if UIP_CONF_IPV6
+ /* IPv6 header. */
+ u8_t vtc,
+ tcf;
+ u16_t flow;
+ u8_t len[2];
+ u8_t proto, ttl;
+ uip_ip6addr_t srcipaddr, destipaddr;
+#else /* UIP_CONF_IPV6 */
+ /* IP header. */
+ u8_t vhl,
+ tos,
+ len[2],
+ ipid[2],
+ ipoffset[2],
+ ttl,
+ proto;
+ u16_t ipchksum;
+ uip_ipaddr_t srcipaddr, destipaddr;
+#endif /* UIP_CONF_IPV6 */
+
+ /* UDP header. */
+ u16_t srcport,
+ destport;
+ u16_t udplen;
+ u16_t udpchksum;
+};
+
+/*
+ * In IPv6 the length of the L3 headers before the transport header is
+ * not fixed, due to the possibility to include extension option headers
+ * after the IP header. hence we split here L3 and L4 headers
+ */
+/* The IP header */
+struct uip_ip_hdr {
+#if UIP_CONF_IPV6
+ /* IPV6 header */
+ u8_t vtc;
+ u8_t tcflow;
+ u16_t flow;
+ u8_t len[2];
+ u8_t proto, ttl;
+ uip_ip6addr_t srcipaddr, destipaddr;
+#else /* UIP_CONF_IPV6 */
+ /* IPV4 header */
+ u8_t vhl,
+ tos,
+ len[2],
+ ipid[2],
+ ipoffset[2],
+ ttl,
+ proto;
+ u16_t ipchksum;
+ uip_ipaddr_t srcipaddr, destipaddr;
+#endif /* UIP_CONF_IPV6 */
+};
+
+
+/*
+ * IPv6 extension option headers: we are able to process
+ * the 4 extension headers defined in RFC2460 (IPv6):
+ * - Hop by hop option header, destination option header:
+ * These two are not used by any core IPv6 protocol, hence
+ * we just read them and go to the next. They convey options,
+ * the options defined in RFC2460 are Pad1 and PadN, which do
+ * some padding, and that we do not need to read (the length
+ * field in the header is enough)
+ * - Routing header: this one is most notably used by MIPv6,
+ * which we do not implement, hence we just read it and go
+ * to the next
+ * - Fragmentation header: we read this header and are able to
+ * reassemble packets
+ *
+ * We do not offer any means to send packets with extension headers
+ *
+ * We do not implement Authentication and ESP headers, which are
+ * used in IPSec and defined in RFC4302,4303,4305,4385
+ */
+/* common header part */
+struct uip_ext_hdr {
+ u8_t next;
+ u8_t len;
+};
+
+/* Hop by Hop option header */
+struct uip_hbho_hdr {
+ u8_t next;
+ u8_t len;
+};
+
+/* destination option header */
+struct uip_desto_hdr {
+ u8_t next;
+ u8_t len;
+};
+
+/* We do not define structures for PAD1 and PADN options */
+
+/*
+ * routing header
+ * the routing header as 4 common bytes, then routing header type
+ * specific data there are several types of routing header. Type 0 was
+ * deprecated as per RFC5095 most notable other type is 2, used in
+ * RFC3775 (MIPv6) here we do not implement MIPv6, so we just need to
+ * parse the 4 first bytes
+ */
+struct uip_routing_hdr {
+ u8_t next;
+ u8_t len;
+ u8_t routing_type;
+ u8_t seg_left;
+};
+
+/* fragmentation header */
+struct uip_frag_hdr {
+ u8_t next;
+ u8_t res;
+ u16_t offsetresmore;
+ u32_t id;
+};
+
+/*
+ * an option within the destination or hop by hop option headers
+ * it contains type an length, which is true for all options but PAD1
+ */
+struct uip_ext_hdr_opt {
+ u8_t type;
+ u8_t len;
+};
+
+/* PADN option */
+struct uip_ext_hdr_opt_padn {
+ u8_t opt_type;
+ u8_t opt_len;
+};
+
+/* TCP header */
+struct uip_tcp_hdr {
+ u16_t srcport;
+ u16_t destport;
+ u8_t seqno[4];
+ u8_t ackno[4];
+ u8_t tcpoffset;
+ u8_t flags;
+ u8_t wnd[2];
+ u16_t tcpchksum;
+ u8_t urgp[2];
+ u8_t optdata[4];
+};
+
+/* The ICMP headers. */
+struct uip_icmp_hdr {
+ u8_t type, icode;
+ u16_t icmpchksum;
+#if !UIP_CONF_IPV6
+ u16_t id, seqno;
+#endif /* !UIP_CONF_IPV6 */
+};
+
+
+/* The UDP headers. */
+struct uip_udp_hdr {
+ u16_t srcport;
+ u16_t destport;
+ u16_t udplen;
+ u16_t udpchksum;
+};
+
+
+/**
+ * The buffer size available for user data in the \ref uip_buf buffer.
+ *
+ * This macro holds the available size for user data in the \ref
+ * uip_buf buffer. The macro is intended to be used for checking
+ * bounds of available user data.
+ *
+ * Example:
+ \code
+ snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i);
+ \endcode
+ *
+ * \hideinitializer
+ */
+#define UIP_APPDATA_SIZE (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN)
+#define UIP_APPDATA_PTR (void *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN]
+
+#define UIP_PROTO_ICMP 1
+#define UIP_PROTO_TCP 6
+#define UIP_PROTO_UDP 17
+#define UIP_PROTO_ICMP6 58
+
+
+#if UIP_CONF_IPV6
+/** @{ */
+/** \brief extension headers types */
+#define UIP_PROTO_HBHO 0
+#define UIP_PROTO_DESTO 60
+#define UIP_PROTO_ROUTING 43
+#define UIP_PROTO_FRAG 44
+#define UIP_PROTO_NONE 59
+/** @} */
+
+/** @{ */
+/** \brief Destination and Hop By Hop extension headers option types */
+#define UIP_EXT_HDR_OPT_PAD1 0
+#define UIP_EXT_HDR_OPT_PADN 1
+/** @} */
+
+/** @{ */
+/**
+ * \brief Bitmaps for extension header processing
+ *
+ * When processing extension headers, we should record somehow which one we
+ * see, because you cannot have twice the same header, except for destination
+ * We store all this in one u8_t bitmap one bit for each header expected. The
+ * order in the bitmap is the order recommended in RFC2460
+ */
+#define UIP_EXT_HDR_BITMAP_HBHO 0x01
+#define UIP_EXT_HDR_BITMAP_DESTO1 0x02
+#define UIP_EXT_HDR_BITMAP_ROUTING 0x04
+#define UIP_EXT_HDR_BITMAP_FRAG 0x08
+#define UIP_EXT_HDR_BITMAP_AH 0x10
+#define UIP_EXT_HDR_BITMAP_ESP 0x20
+#define UIP_EXT_HDR_BITMAP_DESTO2 0x40
+/** @} */
+
+
+#endif /* UIP_CONF_IPV6 */
+
+
+/* Header sizes. */
+#if UIP_CONF_IPV6
+#define UIP_IPH_LEN 40
+#define UIP_FRAGH_LEN 8
+#else /* UIP_CONF_IPV6 */
+#define UIP_IPH_LEN 20 /* Size of IP header */
+#endif /* UIP_CONF_IPV6 */
+
+#define UIP_UDPH_LEN 8 /* Size of UDP header */
+#define UIP_TCPH_LEN 20 /* Size of TCP header */
+#ifdef UIP_IPH_LEN
+#define UIP_ICMPH_LEN 4 /* Size of ICMP header */
+#endif
+#define UIP_IPUDPH_LEN (UIP_UDPH_LEN + UIP_IPH_LEN) /* Size of IP +
+ * UDP
+ * header */
+#define UIP_IPTCPH_LEN (UIP_TCPH_LEN + UIP_IPH_LEN) /* Size of IP +
+ * TCP
+ * header */
+#define UIP_TCPIP_HLEN UIP_IPTCPH_LEN
+#define UIP_IPICMPH_LEN (UIP_IPH_LEN + UIP_ICMPH_LEN) /* size of ICMP
+ + IP header */
+#define UIP_LLIPH_LEN (UIP_LLH_LEN + UIP_IPH_LEN) /* size of L2
+ + IP header */
+#if UIP_CONF_IPV6
+/**
+ * The sums below are quite used in ND. When used for uip_buf, we
+ * include link layer length when used for uip_len, we do not, hence
+ * we need values with and without LLH_LEN we do not use capital
+ * letters as these values are variable
+ */
+#define uip_l2_l3_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len)
+#define uip_l2_l3_icmp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN)
+#define uip_l3_hdr_len (UIP_IPH_LEN + uip_ext_len)
+#define uip_l3_icmp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN)
+#endif /*UIP_CONF_IPV6*/
+
+
+#if UIP_FIXEDADDR
+extern const uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr;
+#else /* UIP_FIXEDADDR */
+extern uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr;
+#endif /* UIP_FIXEDADDR */
+extern const uip_ipaddr_t uip_broadcast_addr;
+extern const uip_ipaddr_t uip_all_zeroes_addr;
+
+#if UIP_FIXEDETHADDR
+extern const uip_lladdr_t uip_lladdr;
+#else
+extern uip_lladdr_t uip_lladdr;
+#endif
+
+
+
+
+#ifdef UIP_CONF_IPV6
+/**
+ * \brief Is IPv6 address a the unspecified address
+ * a is of type uip_ipaddr_t
+ */
+#define uip_is_addr_unspecified(a) \
+ ((((a)->u16[0]) == 0) && \
+ (((a)->u16[1]) == 0) && \
+ (((a)->u16[2]) == 0) && \
+ (((a)->u16[3]) == 0) && \
+ (((a)->u16[4]) == 0) && \
+ (((a)->u16[5]) == 0) && \
+ (((a)->u16[6]) == 0) && \
+ (((a)->u16[7]) == 0))
+
+/** \brief Is IPv6 address a the link local all-nodes multicast address */
+#define uip_is_addr_linklocal_allnodes_mcast(a) \
+ ((((a)->u8[0]) == 0xff) && \
+ (((a)->u8[1]) == 0x02) && \
+ (((a)->u16[1]) == 0) && \
+ (((a)->u16[2]) == 0) && \
+ (((a)->u16[3]) == 0) && \
+ (((a)->u16[4]) == 0) && \
+ (((a)->u16[5]) == 0) && \
+ (((a)->u16[6]) == 0) && \
+ (((a)->u8[14]) == 0) && \
+ (((a)->u8[15]) == 0x01))
+
+/** \brief set IP address a to unspecified */
+#define uip_create_unspecified(a) uip_ip6addr(a, 0, 0, 0, 0, 0, 0, 0, 0)
+
+/** \brief set IP address a to the link local all-nodes multicast address */
+#define uip_create_linklocal_allnodes_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0001)
+
+/** \brief set IP address a to the link local all-routers multicast address */
+#define uip_create_linklocal_allrouters_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0002)
+
+/**
+ * \brief is addr (a) a solicited node multicast address, see RFC3513
+ * a is of type uip_ipaddr_t*
+ */
+#define uip_is_addr_solicited_node(a) \
+ ((((a)->u8[0]) == 0xFF) && \
+ (((a)->u8[1]) == 0x02) && \
+ (((a)->u16[1]) == 0) && \
+ (((a)->u16[2]) == 0) && \
+ (((a)->u16[3]) == 0) && \
+ (((a)->u16[4]) == 0) && \
+ (((a)->u16[5]) == 1) && \
+ (((a)->u8[12]) == 0xFF))
+
+/**
+ * \briefput in b the solicited node address corresponding to address a
+ * both a and b are of type uip_ipaddr_t*
+ * */
+#define uip_create_solicited_node(a, b) \
+ (((b)->u8[0]) = 0xFF); \
+ (((b)->u8[1]) = 0x02); \
+ (((b)->u16[1]) = 0); \
+ (((b)->u16[2]) = 0); \
+ (((b)->u16[3]) = 0); \
+ (((b)->u16[4]) = 0); \
+ (((b)->u8[10]) = 0); \
+ (((b)->u8[11]) = 0x01); \
+ (((b)->u8[12]) = 0xFF); \
+ (((b)->u8[13]) = ((a)->u8[13])); \
+ (((b)->u16[7]) = ((a)->u16[7]))
+
+/**
+ * \brief is addr (a) a link local unicast address, see RFC3513
+ * i.e. is (a) on prefix FE80::/10
+ * a is of type uip_ipaddr_t*
+ */
+#define uip_is_addr_link_local(a) \
+ ((((a)->u8[0]) == 0xFE) && \
+ (((a)->u8[1]) == 0x80))
+
+/**
+ * \brief was addr (a) forged based on the mac address m
+ * a type is uip_ipaddr_t
+ * m type is uiplladdr_t
+ */
+#if UIP_CONF_LL_802154
+#define uip_is_addr_mac_addr_based(a, m) \
+ ((((a)->u8[8]) == (((m)->addr[0]) ^ 0x02)) && \
+ (((a)->u8[9]) == (m)->addr[1]) && \
+ (((a)->u8[10]) == (m)->addr[2]) && \
+ (((a)->u8[11]) == (m)->addr[3]) && \
+ (((a)->u8[12]) == (m)->addr[4]) && \
+ (((a)->u8[13]) == (m)->addr[5]) && \
+ (((a)->u8[14]) == (m)->addr[6]) && \
+ (((a)->u8[15]) == (m)->addr[7]))
+#else
+
+#define uip_is_addr_mac_addr_based(a, m) \
+ ((((a)->u8[8]) == (((m)->addr[0]) | 0x02)) && \
+ (((a)->u8[9]) == (m)->addr[1]) && \
+ (((a)->u8[10]) == (m)->addr[2]) && \
+ (((a)->u8[11]) == 0xff) && \
+ (((a)->u8[12]) == 0xfe) && \
+ (((a)->u8[13]) == (m)->addr[3]) && \
+ (((a)->u8[14]) == (m)->addr[4]) && \
+ (((a)->u8[15]) == (m)->addr[5]))
+
+#endif /*UIP_CONF_LL_802154*/
+
+/**
+ * \brief is address a multicast address, see RFC 3513
+ * a is of type uip_ipaddr_t*
+ * */
+#define uip_is_addr_mcast(a) \
+ (((a)->u8[0]) == 0xFF)
+
+/**
+ * \brief is group-id of multicast address a
+ * the all nodes group-id
+ */
+#define uip_is_mcast_group_id_all_nodes(a) \
+ ((((a)->u16[1]) == 0) && \
+ (((a)->u16[2]) == 0) && \
+ (((a)->u16[3]) == 0) && \
+ (((a)->u16[4]) == 0) && \
+ (((a)->u16[5]) == 0) && \
+ (((a)->u16[6]) == 0) && \
+ (((a)->u8[14]) == 0) && \
+ (((a)->u8[15]) == 1))
+
+/**
+ * \brief is group-id of multicast address a
+ * the all routers group-id
+ */
+#define uip_is_mcast_group_id_all_routers(a) \
+ ((((a)->u16[1]) == 0) && \
+ (((a)->u16[2]) == 0) && \
+ (((a)->u16[3]) == 0) && \
+ (((a)->u16[4]) == 0) && \
+ (((a)->u16[5]) == 0) && \
+ (((a)->u16[6]) == 0) && \
+ (((a)->u8[14]) == 0) && \
+ (((a)->u8[15]) == 2))
+
+
+#endif /*UIP_CONF_IPV6*/
+
+/**
+ * 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.
+ *
+ * \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.
+ *
+ * \return The TCP checksum of the TCP segment in uip_buf and pointed
+ * to by uip_appdata.
+ */
+u16_t uip_tcpchksum(void);
+
+/**
+ * Calculate the UDP checksum of the packet in uip_buf and uip_appdata.
+ *
+ * The UDP checksum is the Internet checksum of data contents of the
+ * UDP segment, and a pseudo-header as defined in RFC768.
+ *
+ * \return The UDP checksum of the UDP segment in uip_buf and pointed
+ * to by uip_appdata.
+ */
+u16_t uip_udpchksum(void);
+
+/**
+ * Calculate the ICMP checksum of the packet in uip_buf.
+ *
+ * \return The ICMP checksum of the ICMP packet in uip_buf
+ */
+u16_t uip_icmp6chksum(void);
+
+
+#endif /* __UIP_H__ */
+
+
+/** @} */
diff --git a/Projects/Webserver/Lib/uip/uip_arp.c b/Projects/Webserver/Lib/uip/uip_arp.c
index 88c14cc01..56dff9c43 100644
--- a/Projects/Webserver/Lib/uip/uip_arp.c
+++ b/Projects/Webserver/Lib/uip/uip_arp.c
@@ -1,431 +1,431 @@
-/**
- * \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 "uip_arp.h"
-
-#include <string.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;
-};
-
-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;
-};
-
-#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 const u16_t broadcast_ipaddr[2] = {0xffff,0xffff};
-
-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])
-
-#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 = NULL;
-
- ++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 = NULL;
- /* 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 = NULL;
-
- /* 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);
-}
-/*-----------------------------------------------------------------------------------*/
-
-/** @} */
-/** @} */
+/**
+ * \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 "uip_arp.h"
+
+#include <string.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;
+};
+
+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;
+};
+
+#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 const u16_t broadcast_ipaddr[2] = {0xffff,0xffff};
+
+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])
+
+#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 = NULL;
+
+ ++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 = NULL;
+ /* 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 = NULL;
+
+ /* 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);
+}
+/*-----------------------------------------------------------------------------------*/
+
+/** @} */
+/** @} */
diff --git a/Projects/Webserver/Lib/uip/uip_arp.h b/Projects/Webserver/Lib/uip/uip_arp.h
index ea2fd293c..114d4310c 100644
--- a/Projects/Webserver/Lib/uip/uip_arp.h
+++ b/Projects/Webserver/Lib/uip/uip_arp.h
@@ -1,145 +1,145 @@
-/**
- * \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 "uip.h"
-
-
-extern struct uip_eth_addr uip_ethaddr;
-
-/**
- * The Ethernet header.
- */
-struct uip_eth_hdr {
- struct uip_eth_addr dest;
- struct uip_eth_addr src;
- u16_t type;
-};
-
-#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__ */
-/** @} */
+/**
+ * \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 "uip.h"
+
+
+extern struct uip_eth_addr uip_ethaddr;
+
+/**
+ * The Ethernet header.
+ */
+struct uip_eth_hdr {
+ struct uip_eth_addr dest;
+ struct uip_eth_addr src;
+ u16_t type;
+};
+
+#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__ */
+/** @} */
diff --git a/Projects/Webserver/Lib/uip/uipopt.h b/Projects/Webserver/Lib/uip/uipopt.h
index 7b9d19092..244ce1df1 100644
--- a/Projects/Webserver/Lib/uip/uipopt.h
+++ b/Projects/Webserver/Lib/uip/uipopt.h
@@ -1,737 +1,737 @@
-/**
- * \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.
- */
-
-/**
- * \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 */
-
-/*------------------------------------------------------------------------------*/
-
-/**
- * \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
- */
-#define UIP_FIXEDADDR 0
-
-/**
- * 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 1
-#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
- */
-#if !defined(UIP_URGDATA)
-#define UIP_URGDATA 0
-#endif
-
-/**
- * The initial retransmission timeout counted in timer pulses.
- *
- * This should not be changed.
- */
-#if !defined(UIP_RTO)
-#define UIP_RTO 3
-#endif
-
-/**
- * The maximum number of times a segment should be retransmitted
- * before the connection should be aborted.
- *
- * This should not be changed.
- */
-#if !defined(UIP_MAXRTX)
-#define UIP_MAXRTX 8
-#endif
-
-/**
- * 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.
- */
-#if !defined(UIP_MAXSYNRTX)
-#define UIP_MAXSYNRTX 5
-#endif
-
-/**
- * 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 */
-
-/** @} */
-/*------------------------------------------------------------------------------*/
-
-#include <ff.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-#include "timer.h"
-
-typedef uint8_t u8_t;
-typedef uint16_t u16_t;
-typedef uint32_t u32_t;
-typedef uint32_t uip_stats_t;
-
-/**
- * \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
-*/
-#define UIP_UDP_APPCALL uIPManagement_UDPCallback
-void UIP_UDP_APPCALL(void);
-
-/**
- * \var #define UIP_APPCALL
- *
- * The name of the application function that uIP should call in
- * response to TCP/IP events.
- *
- */
-#define UIP_APPCALL uIPManagement_TCPCallback
-void UIP_APPCALL(void);
-
-/**
- * \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.
- */
-typedef union
-{
- struct
- {
- uint8_t CurrentState;
- uint8_t NextState;
-
- char FileName[MAX_URI_LENGTH];
- FIL FileHandle;
- bool FileOpen;
- uint32_t ACKedFilePos;
- uint16_t SentChunkSize;
- } HTTPServer;
-
- struct
- {
- uint8_t CurrentState;
- uint8_t NextState;
-
- uint8_t IssuedCommand;
- } TELNETServer;
-} uip_tcp_appstate_t;
-
-/**
- * \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.
- */
-typedef union
-{
- struct
- {
- uint8_t CurrentState;
- struct timer Timeout;
-
- struct
- {
- uint8_t AllocatedIP[4];
- uint8_t Netmask[4];
- uint8_t GatewayIP[4];
- uint8_t ServerIP[4];
- } DHCPOffer_Data;
- } DHCPClient;
-} uip_udp_appstate_t;
-/** @} */
-
-#endif /* __UIPOPT_H__ */
-/** @} */
-/** @} */
+/**
+ * \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.
+ */
+
+/**
+ * \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 */
+
+/*------------------------------------------------------------------------------*/
+
+/**
+ * \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
+ */
+#define UIP_FIXEDADDR 0
+
+/**
+ * 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 1
+#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
+ */
+#if !defined(UIP_URGDATA)
+#define UIP_URGDATA 0
+#endif
+
+/**
+ * The initial retransmission timeout counted in timer pulses.
+ *
+ * This should not be changed.
+ */
+#if !defined(UIP_RTO)
+#define UIP_RTO 3
+#endif
+
+/**
+ * The maximum number of times a segment should be retransmitted
+ * before the connection should be aborted.
+ *
+ * This should not be changed.
+ */
+#if !defined(UIP_MAXRTX)
+#define UIP_MAXRTX 8
+#endif
+
+/**
+ * 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.
+ */
+#if !defined(UIP_MAXSYNRTX)
+#define UIP_MAXSYNRTX 5
+#endif
+
+/**
+ * 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 */
+
+/** @} */
+/*------------------------------------------------------------------------------*/
+
+#include <ff.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "timer.h"
+
+typedef uint8_t u8_t;
+typedef uint16_t u16_t;
+typedef uint32_t u32_t;
+typedef uint32_t uip_stats_t;
+
+/**
+ * \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
+*/
+#define UIP_UDP_APPCALL uIPManagement_UDPCallback
+void UIP_UDP_APPCALL(void);
+
+/**
+ * \var #define UIP_APPCALL
+ *
+ * The name of the application function that uIP should call in
+ * response to TCP/IP events.
+ *
+ */
+#define UIP_APPCALL uIPManagement_TCPCallback
+void UIP_APPCALL(void);
+
+/**
+ * \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.
+ */
+typedef union
+{
+ struct
+ {
+ uint8_t CurrentState;
+ uint8_t NextState;
+
+ char FileName[MAX_URI_LENGTH];
+ FIL FileHandle;
+ bool FileOpen;
+ uint32_t ACKedFilePos;
+ uint16_t SentChunkSize;
+ } HTTPServer;
+
+ struct
+ {
+ uint8_t CurrentState;
+ uint8_t NextState;
+
+ uint8_t IssuedCommand;
+ } TELNETServer;
+} uip_tcp_appstate_t;
+
+/**
+ * \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.
+ */
+typedef union
+{
+ struct
+ {
+ uint8_t CurrentState;
+ struct timer Timeout;
+
+ struct
+ {
+ uint8_t AllocatedIP[4];
+ uint8_t Netmask[4];
+ uint8_t GatewayIP[4];
+ uint8_t ServerIP[4];
+ } DHCPOffer_Data;
+ } DHCPClient;
+} uip_udp_appstate_t;
+/** @} */
+
+#endif /* __UIPOPT_H__ */
+/** @} */
+/** @} */
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