Fix the LUFA lib to use a submodule instead of just files (#6245)

* Remove LUFA files

* Update descriptions for newer version of LUFA

* Create PR6245.md

* Fix CDC(Serial) type errors

* Fix missed merge conflict for AUDIO_DTYPE_CSInterface

11 files changed, 0 insertions, 5909 deletions

diff --git a/lib/lufa/Projects/Webserver/Lib/uip/clock.c b/lib/lufa/Projects/Webserver/Lib/uip/clock.c
deleted file mode 100644
index e71f7209d2..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/clock.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#include <LUFA/Common/Common.h>
-
-#include "clock.h"
-
-//Counted time
-volatile clock_time_t clock_datetime = 0;
-
-//Overflow interrupt
-ISR(TIMER1_COMPA_vect, ISR_BLOCK)
-{
-	clock_datetime += 1;
-}
-
-//Initialise the clock
-void clock_init()
-{
-	OCR1A  = (((F_CPU / 1024) / 100) - 1);
-	TCCR1B = ((1 << WGM12) | (1 << CS12) | (1 << CS10));
-	TIMSK1 = (1 << OCIE1A);
-}
-
-//Return time
-clock_time_t clock_time()
-{
-	clock_time_t time;
-
-	GlobalInterruptDisable();
-	time = clock_datetime;
-	GlobalInterruptEnable();
-
-	return time;
-}
-
diff --git a/lib/lufa/Projects/Webserver/Lib/uip/clock.h b/lib/lufa/Projects/Webserver/Lib/uip/clock.h
deleted file mode 100644
index bbfa4ac0e3..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/clock.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#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/lib/lufa/Projects/Webserver/Lib/uip/timer.c b/lib/lufa/Projects/Webserver/Lib/uip/timer.c
deleted file mode 100644
index eae06f43bd..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/timer.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/**
- * \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_restart() function.
- *
- * \param t A pointer to the timer.
- *
- * \sa timer_restart()
- */
-void
-timer_reset(struct timer *t)
-{
-  t->start += t->interval;
-}
-/*---------------------------------------------------------------------------*/
-/**
- * Restart the timer from the current point in time
- *
- * This function restarts a timer with the same interval that was
- * given to the timer_set() function. The timer will start at the
- * current time.
- *
- * \note A periodic timer will drift if this function is used to reset
- * it. For periodic 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/lib/lufa/Projects/Webserver/Lib/uip/timer.h b/lib/lufa/Projects/Webserver/Lib/uip/timer.h
deleted file mode 100644
index 04917e4c52..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/timer.h
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * \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/lib/lufa/Projects/Webserver/Lib/uip/uip-split.c b/lib/lufa/Projects/Webserver/Lib/uip/uip-split.c
deleted file mode 100644
index 5222a05b63..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uip-split.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * 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
-	if (USB_CurrentMode == USB_MODE_Device)
-	  RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len);
-	else
-	  RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, 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 determined 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
-	if (USB_CurrentMode == USB_MODE_Device)
-	  RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len);
-	else
-	  RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len);
-#endif /* UIP_CONF_IPV6 */
-    return;
-  }
-#endif /* UIP_TCP */
-
-  /*    uip_fw_output();*/
-#if UIP_CONF_IPV6
-	tcpip_ipv6_output();
-#else
-	if (USB_CurrentMode == USB_MODE_Device)
-	  RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len);
-	else
-	  RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len);
-#endif /* UIP_CONF_IPV6 */
-}
-
-/*-----------------------------------------------------------------------------*/
-
diff --git a/lib/lufa/Projects/Webserver/Lib/uip/uip-split.h b/lib/lufa/Projects/Webserver/Lib/uip/uip-split.h
deleted file mode 100644
index 0c768ce40a..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uip-split.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * 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/USB.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/lib/lufa/Projects/Webserver/Lib/uip/uip.c b/lib/lufa/Projects/Webserver/Lib/uip/uip.c
deleted file mode 100644
index fead75775c..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uip.c
+++ /dev/null
@@ -1,1941 +0,0 @@
-#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 optimizer 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
-				listening 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 pseudo-header. */
-
-  /* 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 in-between 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 periodic timer firing. */
-  } 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 back-off. */
-	  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))
-	{
-		if (uip_ipaddr_cmp(&BUF->srcipaddr, &uip_all_zeroes_addr))
-		  uip_ipaddr_copy(&BUF->srcipaddr, &uip_broadcast_addr);
-
-		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
-     yourself. */
-#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 solicitation 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 available. 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 within 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 mechanism.
-    */
-    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: checksum 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/lib/lufa/Projects/Webserver/Lib/uip/uip.h b/lib/lufa/Projects/Webserver/Lib/uip/uip.h
deleted file mode 100644
index 7b87a2c77c..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uip.h
+++ /dev/null
@@ -1,2130 +0,0 @@
-
-/**
- * \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];			/* Initialiser, 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];			/* Initialiser, 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 initialize 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 connection, 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 sixteen 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 received 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 received 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 available. */
-    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 received 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 received 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/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.c b/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.c
deleted file mode 100644
index fcb783b140..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.c
+++ /dev/null
@@ -1,432 +0,0 @@
-/**
- * \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 address 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/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.h b/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.h
deleted file mode 100644
index 4e78ce7b77..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.h
+++ /dev/null
@@ -1,146 +0,0 @@
-/**
- * \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/lib/lufa/Projects/Webserver/Lib/uip/uipopt.h b/lib/lufa/Projects/Webserver/Lib/uip/uipopt.h
deleted file mode 100644
index 520c03f25e..0000000000
--- a/lib/lufa/Projects/Webserver/Lib/uip/uipopt.h
+++ /dev/null
@@ -1,740 +0,0 @@
-/**
- * \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__
-
-#include "Config/AppConfig.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 TCP support should be compiled in or not.
- *
- * \hideinitializer
- */
-#ifdef UIP_CONF_TCP
-#define UIP_TCP UIP_CONF_TCP
-#else /* UIP_CONF_TCP */
-#define UIP_TCP           1
-#endif /* UIP_CONF_TCP */
-
-/**
- * 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__ */
-/** @} */
-/** @} */
-