diff options
Diffstat (limited to 'lib/lufa/Projects/Webserver/Lib/uip')
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/clock.c | 37 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/clock.h | 13 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/timer.c | 128 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/timer.h | 87 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uip-split.c | 151 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uip-split.h | 104 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uip.c | 1941 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uip.h | 2130 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uip_arp.c | 432 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uip_arp.h | 146 | ||||
| -rw-r--r-- | lib/lufa/Projects/Webserver/Lib/uip/uipopt.h | 740 |
11 files changed, 5909 insertions, 0 deletions
diff --git a/lib/lufa/Projects/Webserver/Lib/uip/clock.c b/lib/lufa/Projects/Webserver/Lib/uip/clock.c new file mode 100644 index 000000000..e71f7209d --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/clock.c @@ -0,0 +1,37 @@ +#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 new file mode 100644 index 000000000..bbfa4ac0e --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/clock.h @@ -0,0 +1,13 @@ +#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 new file mode 100644 index 000000000..eae06f43b --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/timer.c @@ -0,0 +1,128 @@ +/** + * \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 new file mode 100644 index 000000000..04917e4c5 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/timer.h @@ -0,0 +1,87 @@ +/** + * \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 new file mode 100644 index 000000000..5222a05b6 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip-split.c @@ -0,0 +1,151 @@ +/* + * 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 new file mode 100644 index 000000000..0c768ce40 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip-split.h @@ -0,0 +1,104 @@ +/* + * 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 new file mode 100644 index 000000000..fead75775 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip.c @@ -0,0 +1,1941 @@ +#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 new file mode 100644 index 000000000..7b87a2c77 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip.h @@ -0,0 +1,2130 @@ + +/** + * \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 new file mode 100644 index 000000000..fcb783b14 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.c @@ -0,0 +1,432 @@ +/** + * \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 new file mode 100644 index 000000000..4e78ce7b7 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip_arp.h @@ -0,0 +1,146 @@ +/** + * \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 new file mode 100644 index 000000000..520c03f25 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uipopt.h @@ -0,0 +1,740 @@ +/** + * \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__ */ +/** @} */ +/** @} */ + |