Nino Der Kinderen / Mbed 2 deprecated InetTest

Embedded C project:18/12/2014

Dependencies:   DS1307 TextLCD mbed

NetServices/lwip/core/ipv4/autoip.c@0:8d87bc453349, 2014-12-18 (annotated)

Committer:
ninoderkinderen
Date:
Thu Dec 18 09:35:49 2014 +0000
Revision:
0:8d87bc453349
Programma embedded C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ninoderkinderen 0:8d87bc453349 1 /**
ninoderkinderen 0:8d87bc453349 2 * @file
ninoderkinderen 0:8d87bc453349 3 * AutoIP Automatic LinkLocal IP Configuration
ninoderkinderen 0:8d87bc453349 4 *
ninoderkinderen 0:8d87bc453349 5 */
ninoderkinderen 0:8d87bc453349 6
ninoderkinderen 0:8d87bc453349 7 /*
ninoderkinderen 0:8d87bc453349 8 *
ninoderkinderen 0:8d87bc453349 9 * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
ninoderkinderen 0:8d87bc453349 10 * All rights reserved.
ninoderkinderen 0:8d87bc453349 11 *
ninoderkinderen 0:8d87bc453349 12 * Redistribution and use in source and binary forms, with or without modification,
ninoderkinderen 0:8d87bc453349 13 * are permitted provided that the following conditions are met:
ninoderkinderen 0:8d87bc453349 14 *
ninoderkinderen 0:8d87bc453349 15 * 1. Redistributions of source code must retain the above copyright notice,
ninoderkinderen 0:8d87bc453349 16 * this list of conditions and the following disclaimer.
ninoderkinderen 0:8d87bc453349 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
ninoderkinderen 0:8d87bc453349 18 * this list of conditions and the following disclaimer in the documentation
ninoderkinderen 0:8d87bc453349 19 * and/or other materials provided with the distribution.
ninoderkinderen 0:8d87bc453349 20 * 3. The name of the author may not be used to endorse or promote products
ninoderkinderen 0:8d87bc453349 21 * derived from this software without specific prior written permission.
ninoderkinderen 0:8d87bc453349 22 *
ninoderkinderen 0:8d87bc453349 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
ninoderkinderen 0:8d87bc453349 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
ninoderkinderen 0:8d87bc453349 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
ninoderkinderen 0:8d87bc453349 26 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
ninoderkinderen 0:8d87bc453349 27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
ninoderkinderen 0:8d87bc453349 28 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
ninoderkinderen 0:8d87bc453349 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
ninoderkinderen 0:8d87bc453349 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
ninoderkinderen 0:8d87bc453349 31 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
ninoderkinderen 0:8d87bc453349 32 * OF SUCH DAMAGE.
ninoderkinderen 0:8d87bc453349 33 *
ninoderkinderen 0:8d87bc453349 34 * Author: Dominik Spies <kontakt@dspies.de>
ninoderkinderen 0:8d87bc453349 35 *
ninoderkinderen 0:8d87bc453349 36 * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
ninoderkinderen 0:8d87bc453349 37 * with RFC 3927.
ninoderkinderen 0:8d87bc453349 38 *
ninoderkinderen 0:8d87bc453349 39 *
ninoderkinderen 0:8d87bc453349 40 * Please coordinate changes and requests with Dominik Spies
ninoderkinderen 0:8d87bc453349 41 * <kontakt@dspies.de>
ninoderkinderen 0:8d87bc453349 42 */
ninoderkinderen 0:8d87bc453349 43
ninoderkinderen 0:8d87bc453349 44 /*******************************************************************************
ninoderkinderen 0:8d87bc453349 45 * USAGE:
ninoderkinderen 0:8d87bc453349 46 *
ninoderkinderen 0:8d87bc453349 47 * define LWIP_AUTOIP 1 in your lwipopts.h
ninoderkinderen 0:8d87bc453349 48 *
ninoderkinderen 0:8d87bc453349 49 * If you don't use tcpip.c (so, don't call, you don't call tcpip_init):
ninoderkinderen 0:8d87bc453349 50 * - First, call autoip_init().
ninoderkinderen 0:8d87bc453349 51 * - call autoip_tmr() all AUTOIP_TMR_INTERVAL msces,
ninoderkinderen 0:8d87bc453349 52 * that should be defined in autoip.h.
ninoderkinderen 0:8d87bc453349 53 * I recommend a value of 100. The value must divide 1000 with a remainder almost 0.
ninoderkinderen 0:8d87bc453349 54 * Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....
ninoderkinderen 0:8d87bc453349 55 *
ninoderkinderen 0:8d87bc453349 56 * Without DHCP:
ninoderkinderen 0:8d87bc453349 57 * - Call autoip_start() after netif_add().
ninoderkinderen 0:8d87bc453349 58 *
ninoderkinderen 0:8d87bc453349 59 * With DHCP:
ninoderkinderen 0:8d87bc453349 60 * - define LWIP_DHCP_AUTOIP_COOP 1 in your lwipopts.h.
ninoderkinderen 0:8d87bc453349 61 * - Configure your DHCP Client.
ninoderkinderen 0:8d87bc453349 62 *
ninoderkinderen 0:8d87bc453349 63 */
ninoderkinderen 0:8d87bc453349 64
ninoderkinderen 0:8d87bc453349 65 #include "lwip/opt.h"
ninoderkinderen 0:8d87bc453349 66
ninoderkinderen 0:8d87bc453349 67 #if LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
ninoderkinderen 0:8d87bc453349 68
ninoderkinderen 0:8d87bc453349 69 #include "lwip/mem.h"
ninoderkinderen 0:8d87bc453349 70 #include "lwip/udp.h"
ninoderkinderen 0:8d87bc453349 71 #include "lwip/ip_addr.h"
ninoderkinderen 0:8d87bc453349 72 #include "lwip/netif.h"
ninoderkinderen 0:8d87bc453349 73 #include "lwip/autoip.h"
ninoderkinderen 0:8d87bc453349 74 #include "netif/etharp.h"
ninoderkinderen 0:8d87bc453349 75
ninoderkinderen 0:8d87bc453349 76 #include <stdlib.h>
ninoderkinderen 0:8d87bc453349 77 #include <string.h>
ninoderkinderen 0:8d87bc453349 78
ninoderkinderen 0:8d87bc453349 79 /* 169.254.0.0 */
ninoderkinderen 0:8d87bc453349 80 #define AUTOIP_NET 0xA9FE0000
ninoderkinderen 0:8d87bc453349 81 /* 169.254.1.0 */
ninoderkinderen 0:8d87bc453349 82 #define AUTOIP_RANGE_START (AUTOIP_NET | 0x0100)
ninoderkinderen 0:8d87bc453349 83 /* 169.254.254.255 */
ninoderkinderen 0:8d87bc453349 84 #define AUTOIP_RANGE_END (AUTOIP_NET | 0xFEFF)
ninoderkinderen 0:8d87bc453349 85
ninoderkinderen 0:8d87bc453349 86
ninoderkinderen 0:8d87bc453349 87 /** Pseudo random macro based on netif informations.
ninoderkinderen 0:8d87bc453349 88 * You could use "rand()" from the C Library if you define LWIP_AUTOIP_RAND in lwipopts.h */
ninoderkinderen 0:8d87bc453349 89 #ifndef LWIP_AUTOIP_RAND
ninoderkinderen 0:8d87bc453349 90 #define LWIP_AUTOIP_RAND(netif) ( (((u32_t)((netif->hwaddr[5]) & 0xff) << 24) | \
ninoderkinderen 0:8d87bc453349 91 ((u32_t)((netif->hwaddr[3]) & 0xff) << 16) | \
ninoderkinderen 0:8d87bc453349 92 ((u32_t)((netif->hwaddr[2]) & 0xff) << 8) | \
ninoderkinderen 0:8d87bc453349 93 ((u32_t)((netif->hwaddr[4]) & 0xff))) + \
ninoderkinderen 0:8d87bc453349 94 (netif->autoip?netif->autoip->tried_llipaddr:0))
ninoderkinderen 0:8d87bc453349 95 #endif /* LWIP_AUTOIP_RAND */
ninoderkinderen 0:8d87bc453349 96
ninoderkinderen 0:8d87bc453349 97 /**
ninoderkinderen 0:8d87bc453349 98 * Macro that generates the initial IP address to be tried by AUTOIP.
ninoderkinderen 0:8d87bc453349 99 * If you want to override this, define it to something else in lwipopts.h.
ninoderkinderen 0:8d87bc453349 100 */
ninoderkinderen 0:8d87bc453349 101 #ifndef LWIP_AUTOIP_CREATE_SEED_ADDR
ninoderkinderen 0:8d87bc453349 102 #define LWIP_AUTOIP_CREATE_SEED_ADDR(netif) \
ninoderkinderen 0:8d87bc453349 103 htonl(AUTOIP_RANGE_START + ((u32_t)(((u8_t)(netif->hwaddr[4])) | \
ninoderkinderen 0:8d87bc453349 104 ((u32_t)((u8_t)(netif->hwaddr[5]))) << 8)))
ninoderkinderen 0:8d87bc453349 105 #endif /* LWIP_AUTOIP_CREATE_SEED_ADDR */
ninoderkinderen 0:8d87bc453349 106
ninoderkinderen 0:8d87bc453349 107 /* static functions */
ninoderkinderen 0:8d87bc453349 108 static void autoip_handle_arp_conflict(struct netif *netif);
ninoderkinderen 0:8d87bc453349 109
ninoderkinderen 0:8d87bc453349 110 /* creates a pseudo random LL IP-Address for a network interface */
ninoderkinderen 0:8d87bc453349 111 static void autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr);
ninoderkinderen 0:8d87bc453349 112
ninoderkinderen 0:8d87bc453349 113 /* sends an ARP probe */
ninoderkinderen 0:8d87bc453349 114 static err_t autoip_arp_probe(struct netif *netif);
ninoderkinderen 0:8d87bc453349 115
ninoderkinderen 0:8d87bc453349 116 /* sends an ARP announce */
ninoderkinderen 0:8d87bc453349 117 static err_t autoip_arp_announce(struct netif *netif);
ninoderkinderen 0:8d87bc453349 118
ninoderkinderen 0:8d87bc453349 119 /* configure interface for use with current LL IP-Address */
ninoderkinderen 0:8d87bc453349 120 static err_t autoip_bind(struct netif *netif);
ninoderkinderen 0:8d87bc453349 121
ninoderkinderen 0:8d87bc453349 122 /* start sending probes for llipaddr */
ninoderkinderen 0:8d87bc453349 123 static void autoip_start_probing(struct netif *netif);
ninoderkinderen 0:8d87bc453349 124
ninoderkinderen 0:8d87bc453349 125 /**
ninoderkinderen 0:8d87bc453349 126 * Initialize this module
ninoderkinderen 0:8d87bc453349 127 */
ninoderkinderen 0:8d87bc453349 128 void
ninoderkinderen 0:8d87bc453349 129 autoip_init(void)
ninoderkinderen 0:8d87bc453349 130 {
ninoderkinderen 0:8d87bc453349 131 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_init()\n"));
ninoderkinderen 0:8d87bc453349 132 }
ninoderkinderen 0:8d87bc453349 133
ninoderkinderen 0:8d87bc453349 134 /** Set a statically allocated struct autoip to work with.
ninoderkinderen 0:8d87bc453349 135 * Using this prevents autoip_start to allocate it using mem_malloc.
ninoderkinderen 0:8d87bc453349 136 *
ninoderkinderen 0:8d87bc453349 137 * @param netif the netif for which to set the struct autoip
ninoderkinderen 0:8d87bc453349 138 * @param dhcp (uninitialised) dhcp struct allocated by the application
ninoderkinderen 0:8d87bc453349 139 */
ninoderkinderen 0:8d87bc453349 140 void
ninoderkinderen 0:8d87bc453349 141 autoip_set_struct(struct netif *netif, struct autoip *autoip)
ninoderkinderen 0:8d87bc453349 142 {
ninoderkinderen 0:8d87bc453349 143 LWIP_ASSERT("netif != NULL", netif != NULL);
ninoderkinderen 0:8d87bc453349 144 LWIP_ASSERT("autoip != NULL", autoip != NULL);
ninoderkinderen 0:8d87bc453349 145 LWIP_ASSERT("netif already has a struct autoip set", netif->autoip == NULL);
ninoderkinderen 0:8d87bc453349 146
ninoderkinderen 0:8d87bc453349 147 /* clear data structure */
ninoderkinderen 0:8d87bc453349 148 memset(autoip, 0, sizeof(struct autoip));
ninoderkinderen 0:8d87bc453349 149 /* autoip->state = AUTOIP_STATE_OFF; */
ninoderkinderen 0:8d87bc453349 150 netif->autoip = autoip;
ninoderkinderen 0:8d87bc453349 151 }
ninoderkinderen 0:8d87bc453349 152
ninoderkinderen 0:8d87bc453349 153 /** Restart AutoIP client and check the next address (conflict detected)
ninoderkinderen 0:8d87bc453349 154 *
ninoderkinderen 0:8d87bc453349 155 * @param netif The netif under AutoIP control
ninoderkinderen 0:8d87bc453349 156 */
ninoderkinderen 0:8d87bc453349 157 static void
ninoderkinderen 0:8d87bc453349 158 autoip_restart(struct netif *netif)
ninoderkinderen 0:8d87bc453349 159 {
ninoderkinderen 0:8d87bc453349 160 netif->autoip->tried_llipaddr++;
ninoderkinderen 0:8d87bc453349 161 autoip_start(netif);
ninoderkinderen 0:8d87bc453349 162 }
ninoderkinderen 0:8d87bc453349 163
ninoderkinderen 0:8d87bc453349 164 /**
ninoderkinderen 0:8d87bc453349 165 * Handle a IP address conflict after an ARP conflict detection
ninoderkinderen 0:8d87bc453349 166 */
ninoderkinderen 0:8d87bc453349 167 static void
ninoderkinderen 0:8d87bc453349 168 autoip_handle_arp_conflict(struct netif *netif)
ninoderkinderen 0:8d87bc453349 169 {
ninoderkinderen 0:8d87bc453349 170 /* Somehow detect if we are defending or retreating */
ninoderkinderen 0:8d87bc453349 171 unsigned char defend = 1; /* tbd */
ninoderkinderen 0:8d87bc453349 172
ninoderkinderen 0:8d87bc453349 173 if(defend) {
ninoderkinderen 0:8d87bc453349 174 if(netif->autoip->lastconflict > 0) {
ninoderkinderen 0:8d87bc453349 175 /* retreat, there was a conflicting ARP in the last
ninoderkinderen 0:8d87bc453349 176 * DEFEND_INTERVAL seconds
ninoderkinderen 0:8d87bc453349 177 */
ninoderkinderen 0:8d87bc453349 178 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 179 ("autoip_handle_arp_conflict(): we are defending, but in DEFEND_INTERVAL, retreating\n"));
ninoderkinderen 0:8d87bc453349 180
ninoderkinderen 0:8d87bc453349 181 /* TODO: close all TCP sessions */
ninoderkinderen 0:8d87bc453349 182 autoip_restart(netif);
ninoderkinderen 0:8d87bc453349 183 } else {
ninoderkinderen 0:8d87bc453349 184 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 185 ("autoip_handle_arp_conflict(): we are defend, send ARP Announce\n"));
ninoderkinderen 0:8d87bc453349 186 autoip_arp_announce(netif);
ninoderkinderen 0:8d87bc453349 187 netif->autoip->lastconflict = DEFEND_INTERVAL * AUTOIP_TICKS_PER_SECOND;
ninoderkinderen 0:8d87bc453349 188 }
ninoderkinderen 0:8d87bc453349 189 } else {
ninoderkinderen 0:8d87bc453349 190 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 191 ("autoip_handle_arp_conflict(): we do not defend, retreating\n"));
ninoderkinderen 0:8d87bc453349 192 /* TODO: close all TCP sessions */
ninoderkinderen 0:8d87bc453349 193 autoip_restart(netif);
ninoderkinderen 0:8d87bc453349 194 }
ninoderkinderen 0:8d87bc453349 195 }
ninoderkinderen 0:8d87bc453349 196
ninoderkinderen 0:8d87bc453349 197 /**
ninoderkinderen 0:8d87bc453349 198 * Create an IP-Address out of range 169.254.1.0 to 169.254.254.255
ninoderkinderen 0:8d87bc453349 199 *
ninoderkinderen 0:8d87bc453349 200 * @param netif network interface on which create the IP-Address
ninoderkinderen 0:8d87bc453349 201 * @param ipaddr ip address to initialize
ninoderkinderen 0:8d87bc453349 202 */
ninoderkinderen 0:8d87bc453349 203 static void
ninoderkinderen 0:8d87bc453349 204 autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr)
ninoderkinderen 0:8d87bc453349 205 {
ninoderkinderen 0:8d87bc453349 206 /* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255
ninoderkinderen 0:8d87bc453349 207 * compliant to RFC 3927 Section 2.1
ninoderkinderen 0:8d87bc453349 208 * We have 254 * 256 possibilities */
ninoderkinderen 0:8d87bc453349 209
ninoderkinderen 0:8d87bc453349 210 u32_t addr = ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif));
ninoderkinderen 0:8d87bc453349 211 addr += netif->autoip->tried_llipaddr;
ninoderkinderen 0:8d87bc453349 212 addr = AUTOIP_NET | (addr & 0xffff);
ninoderkinderen 0:8d87bc453349 213 /* Now, 169.254.0.0 <= addr <= 169.254.255.255 */
ninoderkinderen 0:8d87bc453349 214
ninoderkinderen 0:8d87bc453349 215 if (addr < AUTOIP_RANGE_START) {
ninoderkinderen 0:8d87bc453349 216 addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
ninoderkinderen 0:8d87bc453349 217 }
ninoderkinderen 0:8d87bc453349 218 if (addr > AUTOIP_RANGE_END) {
ninoderkinderen 0:8d87bc453349 219 addr -= AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
ninoderkinderen 0:8d87bc453349 220 }
ninoderkinderen 0:8d87bc453349 221 LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) &&
ninoderkinderen 0:8d87bc453349 222 (addr <= AUTOIP_RANGE_END));
ninoderkinderen 0:8d87bc453349 223 ip4_addr_set_u32(ipaddr, htonl(addr));
ninoderkinderen 0:8d87bc453349 224
ninoderkinderen 0:8d87bc453349 225 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 226 ("autoip_create_addr(): tried_llipaddr=%"U16_F", %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ninoderkinderen 0:8d87bc453349 227 (u16_t)(netif->autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr),
ninoderkinderen 0:8d87bc453349 228 ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
ninoderkinderen 0:8d87bc453349 229 }
ninoderkinderen 0:8d87bc453349 230
ninoderkinderen 0:8d87bc453349 231 /**
ninoderkinderen 0:8d87bc453349 232 * Sends an ARP probe from a network interface
ninoderkinderen 0:8d87bc453349 233 *
ninoderkinderen 0:8d87bc453349 234 * @param netif network interface used to send the probe
ninoderkinderen 0:8d87bc453349 235 */
ninoderkinderen 0:8d87bc453349 236 static err_t
ninoderkinderen 0:8d87bc453349 237 autoip_arp_probe(struct netif *netif)
ninoderkinderen 0:8d87bc453349 238 {
ninoderkinderen 0:8d87bc453349 239 return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast,
ninoderkinderen 0:8d87bc453349 240 (struct eth_addr *)netif->hwaddr, IP_ADDR_ANY, &ethzero,
ninoderkinderen 0:8d87bc453349 241 &netif->autoip->llipaddr, ARP_REQUEST);
ninoderkinderen 0:8d87bc453349 242 }
ninoderkinderen 0:8d87bc453349 243
ninoderkinderen 0:8d87bc453349 244 /**
ninoderkinderen 0:8d87bc453349 245 * Sends an ARP announce from a network interface
ninoderkinderen 0:8d87bc453349 246 *
ninoderkinderen 0:8d87bc453349 247 * @param netif network interface used to send the announce
ninoderkinderen 0:8d87bc453349 248 */
ninoderkinderen 0:8d87bc453349 249 static err_t
ninoderkinderen 0:8d87bc453349 250 autoip_arp_announce(struct netif *netif)
ninoderkinderen 0:8d87bc453349 251 {
ninoderkinderen 0:8d87bc453349 252 return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast,
ninoderkinderen 0:8d87bc453349 253 (struct eth_addr *)netif->hwaddr, &netif->autoip->llipaddr, &ethzero,
ninoderkinderen 0:8d87bc453349 254 &netif->autoip->llipaddr, ARP_REQUEST);
ninoderkinderen 0:8d87bc453349 255 }
ninoderkinderen 0:8d87bc453349 256
ninoderkinderen 0:8d87bc453349 257 /**
ninoderkinderen 0:8d87bc453349 258 * Configure interface for use with current LL IP-Address
ninoderkinderen 0:8d87bc453349 259 *
ninoderkinderen 0:8d87bc453349 260 * @param netif network interface to configure with current LL IP-Address
ninoderkinderen 0:8d87bc453349 261 */
ninoderkinderen 0:8d87bc453349 262 static err_t
ninoderkinderen 0:8d87bc453349 263 autoip_bind(struct netif *netif)
ninoderkinderen 0:8d87bc453349 264 {
ninoderkinderen 0:8d87bc453349 265 struct autoip *autoip = netif->autoip;
ninoderkinderen 0:8d87bc453349 266 ip_addr_t sn_mask, gw_addr;
ninoderkinderen 0:8d87bc453349 267
ninoderkinderen 0:8d87bc453349 268 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
ninoderkinderen 0:8d87bc453349 269 ("autoip_bind(netif=%p) %c%c%"U16_F" %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ninoderkinderen 0:8d87bc453349 270 (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num,
ninoderkinderen 0:8d87bc453349 271 ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ninoderkinderen 0:8d87bc453349 272 ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
ninoderkinderen 0:8d87bc453349 273
ninoderkinderen 0:8d87bc453349 274 IP4_ADDR(&sn_mask, 255, 255, 0, 0);
ninoderkinderen 0:8d87bc453349 275 IP4_ADDR(&gw_addr, 0, 0, 0, 0);
ninoderkinderen 0:8d87bc453349 276
ninoderkinderen 0:8d87bc453349 277 netif_set_ipaddr(netif, &autoip->llipaddr);
ninoderkinderen 0:8d87bc453349 278 netif_set_netmask(netif, &sn_mask);
ninoderkinderen 0:8d87bc453349 279 netif_set_gw(netif, &gw_addr);
ninoderkinderen 0:8d87bc453349 280
ninoderkinderen 0:8d87bc453349 281 /* bring the interface up */
ninoderkinderen 0:8d87bc453349 282 netif_set_up(netif);
ninoderkinderen 0:8d87bc453349 283
ninoderkinderen 0:8d87bc453349 284 return ERR_OK;
ninoderkinderen 0:8d87bc453349 285 }
ninoderkinderen 0:8d87bc453349 286
ninoderkinderen 0:8d87bc453349 287 /**
ninoderkinderen 0:8d87bc453349 288 * Start AutoIP client
ninoderkinderen 0:8d87bc453349 289 *
ninoderkinderen 0:8d87bc453349 290 * @param netif network interface on which start the AutoIP client
ninoderkinderen 0:8d87bc453349 291 */
ninoderkinderen 0:8d87bc453349 292 err_t
ninoderkinderen 0:8d87bc453349 293 autoip_start(struct netif *netif)
ninoderkinderen 0:8d87bc453349 294 {
ninoderkinderen 0:8d87bc453349 295 struct autoip *autoip = netif->autoip;
ninoderkinderen 0:8d87bc453349 296 err_t result = ERR_OK;
ninoderkinderen 0:8d87bc453349 297
ninoderkinderen 0:8d87bc453349 298 if(netif_is_up(netif)) {
ninoderkinderen 0:8d87bc453349 299 netif_set_down(netif);
ninoderkinderen 0:8d87bc453349 300 }
ninoderkinderen 0:8d87bc453349 301
ninoderkinderen 0:8d87bc453349 302 /* Set IP-Address, Netmask and Gateway to 0 to make sure that
ninoderkinderen 0:8d87bc453349 303 * ARP Packets are formed correctly
ninoderkinderen 0:8d87bc453349 304 */
ninoderkinderen 0:8d87bc453349 305 ip_addr_set_zero(&netif->ip_addr);
ninoderkinderen 0:8d87bc453349 306 ip_addr_set_zero(&netif->netmask);
ninoderkinderen 0:8d87bc453349 307 ip_addr_set_zero(&netif->gw);
ninoderkinderen 0:8d87bc453349 308
ninoderkinderen 0:8d87bc453349 309 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 310 ("autoip_start(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0],
ninoderkinderen 0:8d87bc453349 311 netif->name[1], (u16_t)netif->num));
ninoderkinderen 0:8d87bc453349 312 if(autoip == NULL) {
ninoderkinderen 0:8d87bc453349 313 /* no AutoIP client attached yet? */
ninoderkinderen 0:8d87bc453349 314 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
ninoderkinderen 0:8d87bc453349 315 ("autoip_start(): starting new AUTOIP client\n"));
ninoderkinderen 0:8d87bc453349 316 autoip = (struct autoip *)mem_malloc(sizeof(struct autoip));
ninoderkinderen 0:8d87bc453349 317 if(autoip == NULL) {
ninoderkinderen 0:8d87bc453349 318 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
ninoderkinderen 0:8d87bc453349 319 ("autoip_start(): could not allocate autoip\n"));
ninoderkinderen 0:8d87bc453349 320 return ERR_MEM;
ninoderkinderen 0:8d87bc453349 321 }
ninoderkinderen 0:8d87bc453349 322 memset(autoip, 0, sizeof(struct autoip));
ninoderkinderen 0:8d87bc453349 323 /* store this AutoIP client in the netif */
ninoderkinderen 0:8d87bc453349 324 netif->autoip = autoip;
ninoderkinderen 0:8d87bc453349 325 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_start(): allocated autoip"));
ninoderkinderen 0:8d87bc453349 326 } else {
ninoderkinderen 0:8d87bc453349 327 autoip->state = AUTOIP_STATE_OFF;
ninoderkinderen 0:8d87bc453349 328 autoip->ttw = 0;
ninoderkinderen 0:8d87bc453349 329 autoip->sent_num = 0;
ninoderkinderen 0:8d87bc453349 330 ip_addr_set_zero(&autoip->llipaddr);
ninoderkinderen 0:8d87bc453349 331 autoip->lastconflict = 0;
ninoderkinderen 0:8d87bc453349 332 }
ninoderkinderen 0:8d87bc453349 333
ninoderkinderen 0:8d87bc453349 334 autoip_create_addr(netif, &(autoip->llipaddr));
ninoderkinderen 0:8d87bc453349 335 autoip_start_probing(netif);
ninoderkinderen 0:8d87bc453349 336
ninoderkinderen 0:8d87bc453349 337 return result;
ninoderkinderen 0:8d87bc453349 338 }
ninoderkinderen 0:8d87bc453349 339
ninoderkinderen 0:8d87bc453349 340 static void
ninoderkinderen 0:8d87bc453349 341 autoip_start_probing(struct netif *netif)
ninoderkinderen 0:8d87bc453349 342 {
ninoderkinderen 0:8d87bc453349 343 struct autoip *autoip = netif->autoip;
ninoderkinderen 0:8d87bc453349 344
ninoderkinderen 0:8d87bc453349 345 autoip->state = AUTOIP_STATE_PROBING;
ninoderkinderen 0:8d87bc453349 346 autoip->sent_num = 0;
ninoderkinderen 0:8d87bc453349 347 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 348 ("autoip_start_probing(): changing state to PROBING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ninoderkinderen 0:8d87bc453349 349 ip4_addr1_16(&netif->autoip->llipaddr), ip4_addr2_16(&netif->autoip->llipaddr),
ninoderkinderen 0:8d87bc453349 350 ip4_addr3_16(&netif->autoip->llipaddr), ip4_addr4_16(&netif->autoip->llipaddr)));
ninoderkinderen 0:8d87bc453349 351
ninoderkinderen 0:8d87bc453349 352 /* time to wait to first probe, this is randomly
ninoderkinderen 0:8d87bc453349 353 * choosen out of 0 to PROBE_WAIT seconds.
ninoderkinderen 0:8d87bc453349 354 * compliant to RFC 3927 Section 2.2.1
ninoderkinderen 0:8d87bc453349 355 */
ninoderkinderen 0:8d87bc453349 356 autoip->ttw = (u16_t)(LWIP_AUTOIP_RAND(netif) % (PROBE_WAIT * AUTOIP_TICKS_PER_SECOND));
ninoderkinderen 0:8d87bc453349 357
ninoderkinderen 0:8d87bc453349 358 /*
ninoderkinderen 0:8d87bc453349 359 * if we tried more then MAX_CONFLICTS we must limit our rate for
ninoderkinderen 0:8d87bc453349 360 * accquiring and probing address
ninoderkinderen 0:8d87bc453349 361 * compliant to RFC 3927 Section 2.2.1
ninoderkinderen 0:8d87bc453349 362 */
ninoderkinderen 0:8d87bc453349 363 if(autoip->tried_llipaddr > MAX_CONFLICTS) {
ninoderkinderen 0:8d87bc453349 364 autoip->ttw = RATE_LIMIT_INTERVAL * AUTOIP_TICKS_PER_SECOND;
ninoderkinderen 0:8d87bc453349 365 }
ninoderkinderen 0:8d87bc453349 366 }
ninoderkinderen 0:8d87bc453349 367
ninoderkinderen 0:8d87bc453349 368 /**
ninoderkinderen 0:8d87bc453349 369 * Handle a possible change in the network configuration.
ninoderkinderen 0:8d87bc453349 370 *
ninoderkinderen 0:8d87bc453349 371 * If there is an AutoIP address configured, take the interface down
ninoderkinderen 0:8d87bc453349 372 * and begin probing with the same address.
ninoderkinderen 0:8d87bc453349 373 */
ninoderkinderen 0:8d87bc453349 374 void
ninoderkinderen 0:8d87bc453349 375 autoip_network_changed(struct netif *netif)
ninoderkinderen 0:8d87bc453349 376 {
ninoderkinderen 0:8d87bc453349 377 if (netif->autoip && netif->autoip->state != AUTOIP_STATE_OFF) {
ninoderkinderen 0:8d87bc453349 378 netif_set_down(netif);
ninoderkinderen 0:8d87bc453349 379 autoip_start_probing(netif);
ninoderkinderen 0:8d87bc453349 380 }
ninoderkinderen 0:8d87bc453349 381 }
ninoderkinderen 0:8d87bc453349 382
ninoderkinderen 0:8d87bc453349 383 /**
ninoderkinderen 0:8d87bc453349 384 * Stop AutoIP client
ninoderkinderen 0:8d87bc453349 385 *
ninoderkinderen 0:8d87bc453349 386 * @param netif network interface on which stop the AutoIP client
ninoderkinderen 0:8d87bc453349 387 */
ninoderkinderen 0:8d87bc453349 388 err_t
ninoderkinderen 0:8d87bc453349 389 autoip_stop(struct netif *netif)
ninoderkinderen 0:8d87bc453349 390 {
ninoderkinderen 0:8d87bc453349 391 netif->autoip->state = AUTOIP_STATE_OFF;
ninoderkinderen 0:8d87bc453349 392 netif_set_down(netif);
ninoderkinderen 0:8d87bc453349 393 return ERR_OK;
ninoderkinderen 0:8d87bc453349 394 }
ninoderkinderen 0:8d87bc453349 395
ninoderkinderen 0:8d87bc453349 396 /**
ninoderkinderen 0:8d87bc453349 397 * Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds
ninoderkinderen 0:8d87bc453349 398 */
ninoderkinderen 0:8d87bc453349 399 void
ninoderkinderen 0:8d87bc453349 400 autoip_tmr()
ninoderkinderen 0:8d87bc453349 401 {
ninoderkinderen 0:8d87bc453349 402 struct netif *netif = netif_list;
ninoderkinderen 0:8d87bc453349 403 /* loop through netif's */
ninoderkinderen 0:8d87bc453349 404 while (netif != NULL) {
ninoderkinderen 0:8d87bc453349 405 /* only act on AutoIP configured interfaces */
ninoderkinderen 0:8d87bc453349 406 if (netif->autoip != NULL) {
ninoderkinderen 0:8d87bc453349 407 if(netif->autoip->lastconflict > 0) {
ninoderkinderen 0:8d87bc453349 408 netif->autoip->lastconflict--;
ninoderkinderen 0:8d87bc453349 409 }
ninoderkinderen 0:8d87bc453349 410
ninoderkinderen 0:8d87bc453349 411 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
ninoderkinderen 0:8d87bc453349 412 ("autoip_tmr() AutoIP-State: %"U16_F", ttw=%"U16_F"\n",
ninoderkinderen 0:8d87bc453349 413 (u16_t)(netif->autoip->state), netif->autoip->ttw));
ninoderkinderen 0:8d87bc453349 414
ninoderkinderen 0:8d87bc453349 415 switch(netif->autoip->state) {
ninoderkinderen 0:8d87bc453349 416 case AUTOIP_STATE_PROBING:
ninoderkinderen 0:8d87bc453349 417 if(netif->autoip->ttw > 0) {
ninoderkinderen 0:8d87bc453349 418 netif->autoip->ttw--;
ninoderkinderen 0:8d87bc453349 419 } else {
ninoderkinderen 0:8d87bc453349 420 if(netif->autoip->sent_num >= PROBE_NUM) {
ninoderkinderen 0:8d87bc453349 421 netif->autoip->state = AUTOIP_STATE_ANNOUNCING;
ninoderkinderen 0:8d87bc453349 422 netif->autoip->sent_num = 0;
ninoderkinderen 0:8d87bc453349 423 netif->autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
ninoderkinderen 0:8d87bc453349 424 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 425 ("autoip_tmr(): changing state to ANNOUNCING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ninoderkinderen 0:8d87bc453349 426 ip4_addr1_16(&netif->autoip->llipaddr), ip4_addr2_16(&netif->autoip->llipaddr),
ninoderkinderen 0:8d87bc453349 427 ip4_addr3_16(&netif->autoip->llipaddr), ip4_addr4_16(&netif->autoip->llipaddr)));
ninoderkinderen 0:8d87bc453349 428 } else {
ninoderkinderen 0:8d87bc453349 429 autoip_arp_probe(netif);
ninoderkinderen 0:8d87bc453349 430 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
ninoderkinderen 0:8d87bc453349 431 ("autoip_tmr() PROBING Sent Probe\n"));
ninoderkinderen 0:8d87bc453349 432 netif->autoip->sent_num++;
ninoderkinderen 0:8d87bc453349 433 /* calculate time to wait to next probe */
ninoderkinderen 0:8d87bc453349 434 netif->autoip->ttw = (u16_t)((LWIP_AUTOIP_RAND(netif) %
ninoderkinderen 0:8d87bc453349 435 ((PROBE_MAX - PROBE_MIN) * AUTOIP_TICKS_PER_SECOND) ) +
ninoderkinderen 0:8d87bc453349 436 PROBE_MIN * AUTOIP_TICKS_PER_SECOND);
ninoderkinderen 0:8d87bc453349 437 }
ninoderkinderen 0:8d87bc453349 438 }
ninoderkinderen 0:8d87bc453349 439 break;
ninoderkinderen 0:8d87bc453349 440
ninoderkinderen 0:8d87bc453349 441 case AUTOIP_STATE_ANNOUNCING:
ninoderkinderen 0:8d87bc453349 442 if(netif->autoip->ttw > 0) {
ninoderkinderen 0:8d87bc453349 443 netif->autoip->ttw--;
ninoderkinderen 0:8d87bc453349 444 } else {
ninoderkinderen 0:8d87bc453349 445 if(netif->autoip->sent_num == 0) {
ninoderkinderen 0:8d87bc453349 446 /* We are here the first time, so we waited ANNOUNCE_WAIT seconds
ninoderkinderen 0:8d87bc453349 447 * Now we can bind to an IP address and use it.
ninoderkinderen 0:8d87bc453349 448 *
ninoderkinderen 0:8d87bc453349 449 * autoip_bind calls netif_set_up. This triggers a gratuitous ARP
ninoderkinderen 0:8d87bc453349 450 * which counts as an announcement.
ninoderkinderen 0:8d87bc453349 451 */
ninoderkinderen 0:8d87bc453349 452 autoip_bind(netif);
ninoderkinderen 0:8d87bc453349 453 } else {
ninoderkinderen 0:8d87bc453349 454 autoip_arp_announce(netif);
ninoderkinderen 0:8d87bc453349 455 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
ninoderkinderen 0:8d87bc453349 456 ("autoip_tmr() ANNOUNCING Sent Announce\n"));
ninoderkinderen 0:8d87bc453349 457 }
ninoderkinderen 0:8d87bc453349 458 netif->autoip->ttw = ANNOUNCE_INTERVAL * AUTOIP_TICKS_PER_SECOND;
ninoderkinderen 0:8d87bc453349 459 netif->autoip->sent_num++;
ninoderkinderen 0:8d87bc453349 460
ninoderkinderen 0:8d87bc453349 461 if(netif->autoip->sent_num >= ANNOUNCE_NUM) {
ninoderkinderen 0:8d87bc453349 462 netif->autoip->state = AUTOIP_STATE_BOUND;
ninoderkinderen 0:8d87bc453349 463 netif->autoip->sent_num = 0;
ninoderkinderen 0:8d87bc453349 464 netif->autoip->ttw = 0;
ninoderkinderen 0:8d87bc453349 465 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
ninoderkinderen 0:8d87bc453349 466 ("autoip_tmr(): changing state to BOUND: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ninoderkinderen 0:8d87bc453349 467 ip4_addr1_16(&netif->autoip->llipaddr), ip4_addr2_16(&netif->autoip->llipaddr),
ninoderkinderen 0:8d87bc453349 468 ip4_addr3_16(&netif->autoip->llipaddr), ip4_addr4_16(&netif->autoip->llipaddr)));
ninoderkinderen 0:8d87bc453349 469 }
ninoderkinderen 0:8d87bc453349 470 }
ninoderkinderen 0:8d87bc453349 471 break;
ninoderkinderen 0:8d87bc453349 472 }
ninoderkinderen 0:8d87bc453349 473 }
ninoderkinderen 0:8d87bc453349 474 /* proceed to next network interface */
ninoderkinderen 0:8d87bc453349 475 netif = netif->next;
ninoderkinderen 0:8d87bc453349 476 }
ninoderkinderen 0:8d87bc453349 477 }
ninoderkinderen 0:8d87bc453349 478
ninoderkinderen 0:8d87bc453349 479 /**
ninoderkinderen 0:8d87bc453349 480 * Handles every incoming ARP Packet, called by etharp_arp_input.
ninoderkinderen 0:8d87bc453349 481 *
ninoderkinderen 0:8d87bc453349 482 * @param netif network interface to use for autoip processing
ninoderkinderen 0:8d87bc453349 483 * @param hdr Incoming ARP packet
ninoderkinderen 0:8d87bc453349 484 */
ninoderkinderen 0:8d87bc453349 485 void
ninoderkinderen 0:8d87bc453349 486 autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
ninoderkinderen 0:8d87bc453349 487 {
ninoderkinderen 0:8d87bc453349 488 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_arp_reply()\n"));
ninoderkinderen 0:8d87bc453349 489 if ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) {
ninoderkinderen 0:8d87bc453349 490 /* when ip.src == llipaddr && hw.src != netif->hwaddr
ninoderkinderen 0:8d87bc453349 491 *
ninoderkinderen 0:8d87bc453349 492 * when probing ip.dst == llipaddr && hw.src != netif->hwaddr
ninoderkinderen 0:8d87bc453349 493 * we have a conflict and must solve it
ninoderkinderen 0:8d87bc453349 494 */
ninoderkinderen 0:8d87bc453349 495 ip_addr_t sipaddr, dipaddr;
ninoderkinderen 0:8d87bc453349 496 struct eth_addr netifaddr;
ninoderkinderen 0:8d87bc453349 497 netifaddr.addr[0] = netif->hwaddr[0];
ninoderkinderen 0:8d87bc453349 498 netifaddr.addr[1] = netif->hwaddr[1];
ninoderkinderen 0:8d87bc453349 499 netifaddr.addr[2] = netif->hwaddr[2];
ninoderkinderen 0:8d87bc453349 500 netifaddr.addr[3] = netif->hwaddr[3];
ninoderkinderen 0:8d87bc453349 501 netifaddr.addr[4] = netif->hwaddr[4];
ninoderkinderen 0:8d87bc453349 502 netifaddr.addr[5] = netif->hwaddr[5];
ninoderkinderen 0:8d87bc453349 503
ninoderkinderen 0:8d87bc453349 504 /* Copy struct ip_addr2 to aligned ip_addr, to support compilers without
ninoderkinderen 0:8d87bc453349 505 * structure packing (not using structure copy which breaks strict-aliasing rules).
ninoderkinderen 0:8d87bc453349 506 */
ninoderkinderen 0:8d87bc453349 507 IPADDR2_COPY(&sipaddr, &hdr->sipaddr);
ninoderkinderen 0:8d87bc453349 508 IPADDR2_COPY(&dipaddr, &hdr->dipaddr);
ninoderkinderen 0:8d87bc453349 509
ninoderkinderen 0:8d87bc453349 510 if ((netif->autoip->state == AUTOIP_STATE_PROBING) ||
ninoderkinderen 0:8d87bc453349 511 ((netif->autoip->state == AUTOIP_STATE_ANNOUNCING) &&
ninoderkinderen 0:8d87bc453349 512 (netif->autoip->sent_num == 0))) {
ninoderkinderen 0:8d87bc453349 513 /* RFC 3927 Section 2.2.1:
ninoderkinderen 0:8d87bc453349 514 * from beginning to after ANNOUNCE_WAIT
ninoderkinderen 0:8d87bc453349 515 * seconds we have a conflict if
ninoderkinderen 0:8d87bc453349 516 * ip.src == llipaddr OR
ninoderkinderen 0:8d87bc453349 517 * ip.dst == llipaddr && hw.src != own hwaddr
ninoderkinderen 0:8d87bc453349 518 */
ninoderkinderen 0:8d87bc453349 519 if ((ip_addr_cmp(&sipaddr, &netif->autoip->llipaddr)) ||
ninoderkinderen 0:8d87bc453349 520 (ip_addr_cmp(&dipaddr, &netif->autoip->llipaddr) &&
ninoderkinderen 0:8d87bc453349 521 !eth_addr_cmp(&netifaddr, &hdr->shwaddr))) {
ninoderkinderen 0:8d87bc453349 522 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
ninoderkinderen 0:8d87bc453349 523 ("autoip_arp_reply(): Probe Conflict detected\n"));
ninoderkinderen 0:8d87bc453349 524 autoip_restart(netif);
ninoderkinderen 0:8d87bc453349 525 }
ninoderkinderen 0:8d87bc453349 526 } else {
ninoderkinderen 0:8d87bc453349 527 /* RFC 3927 Section 2.5:
ninoderkinderen 0:8d87bc453349 528 * in any state we have a conflict if
ninoderkinderen 0:8d87bc453349 529 * ip.src == llipaddr && hw.src != own hwaddr
ninoderkinderen 0:8d87bc453349 530 */
ninoderkinderen 0:8d87bc453349 531 if (ip_addr_cmp(&sipaddr, &netif->autoip->llipaddr) &&
ninoderkinderen 0:8d87bc453349 532 !eth_addr_cmp(&netifaddr, &hdr->shwaddr)) {
ninoderkinderen 0:8d87bc453349 533 LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
ninoderkinderen 0:8d87bc453349 534 ("autoip_arp_reply(): Conflicting ARP-Packet detected\n"));
ninoderkinderen 0:8d87bc453349 535 autoip_handle_arp_conflict(netif);
ninoderkinderen 0:8d87bc453349 536 }
ninoderkinderen 0:8d87bc453349 537 }
ninoderkinderen 0:8d87bc453349 538 }
ninoderkinderen 0:8d87bc453349 539 }
ninoderkinderen 0:8d87bc453349 540
ninoderkinderen 0:8d87bc453349 541 #endif /* LWIP_AUTOIP */