Hendrik Lipka / NetServicesMin

Stripped down version of Segundos NetService library (http://mbed.org/users/segundo/libraries/NetServices ). I have removed all NetServices, and all functions which had been disabled. Use this version when you need only pure TCP or UDP functions - this library compiles faster.

Dependencies:   lwip lwip-sys

Dependents:   christmasLights device_server pop3demo device_server_udp ... more

lwip/core/ipv4/ip.c@0:8b387bed54c2, 2011-01-10 (annotated)

Committer:
hlipka
Date:
Mon Jan 10 21:03:11 2011 +0000
Revision:
0:8b387bed54c2
initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hlipka 0:8b387bed54c2 1 /**
hlipka 0:8b387bed54c2 2 * @file
hlipka 0:8b387bed54c2 3 * This is the IPv4 layer implementation for incoming and outgoing IP traffic.
hlipka 0:8b387bed54c2 4 *
hlipka 0:8b387bed54c2 5 * @see ip_frag.c
hlipka 0:8b387bed54c2 6 *
hlipka 0:8b387bed54c2 7 */
hlipka 0:8b387bed54c2 8
hlipka 0:8b387bed54c2 9 /*
hlipka 0:8b387bed54c2 10 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
hlipka 0:8b387bed54c2 11 * All rights reserved.
hlipka 0:8b387bed54c2 12 *
hlipka 0:8b387bed54c2 13 * Redistribution and use in source and binary forms, with or without modification,
hlipka 0:8b387bed54c2 14 * are permitted provided that the following conditions are met:
hlipka 0:8b387bed54c2 15 *
hlipka 0:8b387bed54c2 16 * 1. Redistributions of source code must retain the above copyright notice,
hlipka 0:8b387bed54c2 17 * this list of conditions and the following disclaimer.
hlipka 0:8b387bed54c2 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
hlipka 0:8b387bed54c2 19 * this list of conditions and the following disclaimer in the documentation
hlipka 0:8b387bed54c2 20 * and/or other materials provided with the distribution.
hlipka 0:8b387bed54c2 21 * 3. The name of the author may not be used to endorse or promote products
hlipka 0:8b387bed54c2 22 * derived from this software without specific prior written permission.
hlipka 0:8b387bed54c2 23 *
hlipka 0:8b387bed54c2 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
hlipka 0:8b387bed54c2 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
hlipka 0:8b387bed54c2 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
hlipka 0:8b387bed54c2 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
hlipka 0:8b387bed54c2 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
hlipka 0:8b387bed54c2 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
hlipka 0:8b387bed54c2 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
hlipka 0:8b387bed54c2 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
hlipka 0:8b387bed54c2 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
hlipka 0:8b387bed54c2 33 * OF SUCH DAMAGE.
hlipka 0:8b387bed54c2 34 *
hlipka 0:8b387bed54c2 35 * This file is part of the lwIP TCP/IP stack.
hlipka 0:8b387bed54c2 36 *
hlipka 0:8b387bed54c2 37 * Author: Adam Dunkels <adam@sics.se>
hlipka 0:8b387bed54c2 38 *
hlipka 0:8b387bed54c2 39 */
hlipka 0:8b387bed54c2 40
hlipka 0:8b387bed54c2 41 #include "lwip/opt.h"
hlipka 0:8b387bed54c2 42 #include "lwip/ip.h"
hlipka 0:8b387bed54c2 43 #include "lwip/def.h"
hlipka 0:8b387bed54c2 44 #include "lwip/mem.h"
hlipka 0:8b387bed54c2 45 #include "lwip/ip_frag.h"
hlipka 0:8b387bed54c2 46 #include "lwip/inet_chksum.h"
hlipka 0:8b387bed54c2 47 #include "lwip/netif.h"
hlipka 0:8b387bed54c2 48 #include "lwip/icmp.h"
hlipka 0:8b387bed54c2 49 #include "lwip/igmp.h"
hlipka 0:8b387bed54c2 50 #include "lwip/raw.h"
hlipka 0:8b387bed54c2 51 #include "lwip/udp.h"
hlipka 0:8b387bed54c2 52 #include "lwip/tcp_impl.h"
hlipka 0:8b387bed54c2 53 #include "lwip/snmp.h"
hlipka 0:8b387bed54c2 54 #include "lwip/dhcp.h"
hlipka 0:8b387bed54c2 55 #include "lwip/autoip.h"
hlipka 0:8b387bed54c2 56 #include "lwip/stats.h"
hlipka 0:8b387bed54c2 57 #include "arch/perf.h"
hlipka 0:8b387bed54c2 58
hlipka 0:8b387bed54c2 59 #include <string.h>
hlipka 0:8b387bed54c2 60
hlipka 0:8b387bed54c2 61 /** Set this to 0 in the rare case of wanting to call an extra function to
hlipka 0:8b387bed54c2 62 * generate the IP checksum (in contrast to calculating it on-the-fly). */
hlipka 0:8b387bed54c2 63 #ifndef LWIP_INLINE_IP_CHKSUM
hlipka 0:8b387bed54c2 64 #define LWIP_INLINE_IP_CHKSUM 1
hlipka 0:8b387bed54c2 65 #endif
hlipka 0:8b387bed54c2 66 #if LWIP_INLINE_IP_CHKSUM && CHECKSUM_GEN_IP
hlipka 0:8b387bed54c2 67 #define CHECKSUM_GEN_IP_INLINE 1
hlipka 0:8b387bed54c2 68 #else
hlipka 0:8b387bed54c2 69 #define CHECKSUM_GEN_IP_INLINE 0
hlipka 0:8b387bed54c2 70 #endif
hlipka 0:8b387bed54c2 71
hlipka 0:8b387bed54c2 72 #if LWIP_DHCP || defined(LWIP_IP_ACCEPT_UDP_PORT)
hlipka 0:8b387bed54c2 73 #define IP_ACCEPT_LINK_LAYER_ADDRESSING 1
hlipka 0:8b387bed54c2 74
hlipka 0:8b387bed54c2 75 /** Some defines for DHCP to let link-layer-addressed packets through while the
hlipka 0:8b387bed54c2 76 * netif is down.
hlipka 0:8b387bed54c2 77 * To use this in your own application/protocol, define LWIP_IP_ACCEPT_UDP_PORT
hlipka 0:8b387bed54c2 78 * to return 1 if the port is accepted and 0 if the port is not accepted.
hlipka 0:8b387bed54c2 79 */
hlipka 0:8b387bed54c2 80 #if LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT)
hlipka 0:8b387bed54c2 81 /* accept DHCP client port and custom port */
hlipka 0:8b387bed54c2 82 #define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) (((port) == PP_NTOHS(DHCP_CLIENT_PORT)) \
hlipka 0:8b387bed54c2 83 || (LWIP_IP_ACCEPT_UDP_PORT(port)))
hlipka 0:8b387bed54c2 84 #elif defined(LWIP_IP_ACCEPT_UDP_PORT) /* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */
hlipka 0:8b387bed54c2 85 /* accept custom port only */
hlipka 0:8b387bed54c2 86 #define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) (LWIP_IP_ACCEPT_UDP_PORT(dst_port))
hlipka 0:8b387bed54c2 87 #else /* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */
hlipka 0:8b387bed54c2 88 /* accept DHCP client port only */
hlipka 0:8b387bed54c2 89 #define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) ((port) == PP_NTOHS(DHCP_CLIENT_PORT))
hlipka 0:8b387bed54c2 90 #endif /* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */
hlipka 0:8b387bed54c2 91
hlipka 0:8b387bed54c2 92 #else /* LWIP_DHCP */
hlipka 0:8b387bed54c2 93 #define IP_ACCEPT_LINK_LAYER_ADDRESSING 0
hlipka 0:8b387bed54c2 94 #endif /* LWIP_DHCP */
hlipka 0:8b387bed54c2 95
hlipka 0:8b387bed54c2 96 /**
hlipka 0:8b387bed54c2 97 * The interface that provided the packet for the current callback
hlipka 0:8b387bed54c2 98 * invocation.
hlipka 0:8b387bed54c2 99 */
hlipka 0:8b387bed54c2 100 struct netif *current_netif;
hlipka 0:8b387bed54c2 101
hlipka 0:8b387bed54c2 102 /**
hlipka 0:8b387bed54c2 103 * Header of the input packet currently being processed.
hlipka 0:8b387bed54c2 104 */
hlipka 0:8b387bed54c2 105 const struct ip_hdr *current_header;
hlipka 0:8b387bed54c2 106 /** Source IP address of current_header */
hlipka 0:8b387bed54c2 107 ip_addr_t current_iphdr_src;
hlipka 0:8b387bed54c2 108 /** Destination IP address of current_header */
hlipka 0:8b387bed54c2 109 ip_addr_t current_iphdr_dest;
hlipka 0:8b387bed54c2 110
hlipka 0:8b387bed54c2 111 /** The IP header ID of the next outgoing IP packet */
hlipka 0:8b387bed54c2 112 static u16_t ip_id;
hlipka 0:8b387bed54c2 113
hlipka 0:8b387bed54c2 114 /**
hlipka 0:8b387bed54c2 115 * Finds the appropriate network interface for a given IP address. It
hlipka 0:8b387bed54c2 116 * searches the list of network interfaces linearly. A match is found
hlipka 0:8b387bed54c2 117 * if the masked IP address of the network interface equals the masked
hlipka 0:8b387bed54c2 118 * IP address given to the function.
hlipka 0:8b387bed54c2 119 *
hlipka 0:8b387bed54c2 120 * @param dest the destination IP address for which to find the route
hlipka 0:8b387bed54c2 121 * @return the netif on which to send to reach dest
hlipka 0:8b387bed54c2 122 */
hlipka 0:8b387bed54c2 123 struct netif *
hlipka 0:8b387bed54c2 124 ip_route(ip_addr_t *dest)
hlipka 0:8b387bed54c2 125 {
hlipka 0:8b387bed54c2 126 struct netif *netif;
hlipka 0:8b387bed54c2 127
hlipka 0:8b387bed54c2 128 /* iterate through netifs */
hlipka 0:8b387bed54c2 129 for(netif = netif_list; netif != NULL; netif = netif->next) {
hlipka 0:8b387bed54c2 130 /* network mask matches? */
hlipka 0:8b387bed54c2 131 if (netif_is_up(netif)) {
hlipka 0:8b387bed54c2 132 if (ip_addr_netcmp(dest, &(netif->ip_addr), &(netif->netmask))) {
hlipka 0:8b387bed54c2 133 /* return netif on which to forward IP packet */
hlipka 0:8b387bed54c2 134 return netif;
hlipka 0:8b387bed54c2 135 }
hlipka 0:8b387bed54c2 136 }
hlipka 0:8b387bed54c2 137 }
hlipka 0:8b387bed54c2 138 if ((netif_default == NULL) || (!netif_is_up(netif_default))) {
hlipka 0:8b387bed54c2 139 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip_route: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
hlipka 0:8b387bed54c2 140 ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));
hlipka 0:8b387bed54c2 141 IP_STATS_INC(ip.rterr);
hlipka 0:8b387bed54c2 142 snmp_inc_ipoutnoroutes();
hlipka 0:8b387bed54c2 143 return NULL;
hlipka 0:8b387bed54c2 144 }
hlipka 0:8b387bed54c2 145 /* no matching netif found, use default netif */
hlipka 0:8b387bed54c2 146 return netif_default;
hlipka 0:8b387bed54c2 147 }
hlipka 0:8b387bed54c2 148
hlipka 0:8b387bed54c2 149 #if IP_FORWARD
hlipka 0:8b387bed54c2 150 /**
hlipka 0:8b387bed54c2 151 * Forwards an IP packet. It finds an appropriate route for the
hlipka 0:8b387bed54c2 152 * packet, decrements the TTL value of the packet, adjusts the
hlipka 0:8b387bed54c2 153 * checksum and outputs the packet on the appropriate interface.
hlipka 0:8b387bed54c2 154 *
hlipka 0:8b387bed54c2 155 * @param p the packet to forward (p->payload points to IP header)
hlipka 0:8b387bed54c2 156 * @param iphdr the IP header of the input packet
hlipka 0:8b387bed54c2 157 * @param inp the netif on which this packet was received
hlipka 0:8b387bed54c2 158 */
hlipka 0:8b387bed54c2 159 static void
hlipka 0:8b387bed54c2 160 ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp)
hlipka 0:8b387bed54c2 161 {
hlipka 0:8b387bed54c2 162 struct netif *netif;
hlipka 0:8b387bed54c2 163
hlipka 0:8b387bed54c2 164 PERF_START;
hlipka 0:8b387bed54c2 165
hlipka 0:8b387bed54c2 166 /* RFC3927 2.7: do not forward link-local addresses */
hlipka 0:8b387bed54c2 167 if (ip_addr_islinklocal(&current_iphdr_dest)) {
hlipka 0:8b387bed54c2 168 LWIP_DEBUGF(IP_DEBUG, ("ip_forward: not forwarding LLA %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
hlipka 0:8b387bed54c2 169 ip4_addr1_16(&current_iphdr_dest), ip4_addr2_16(&current_iphdr_dest),
hlipka 0:8b387bed54c2 170 ip4_addr3_16(&current_iphdr_dest), ip4_addr4_16(&current_iphdr_dest)));
hlipka 0:8b387bed54c2 171 goto return_noroute;
hlipka 0:8b387bed54c2 172 }
hlipka 0:8b387bed54c2 173
hlipka 0:8b387bed54c2 174 /* Find network interface where to forward this IP packet to. */
hlipka 0:8b387bed54c2 175 netif = ip_route(&current_iphdr_dest);
hlipka 0:8b387bed54c2 176 if (netif == NULL) {
hlipka 0:8b387bed54c2 177 LWIP_DEBUGF(IP_DEBUG, ("ip_forward: no forwarding route for %"U16_F".%"U16_F".%"U16_F".%"U16_F" found\n",
hlipka 0:8b387bed54c2 178 ip4_addr1_16(&current_iphdr_dest), ip4_addr2_16(&current_iphdr_dest),
hlipka 0:8b387bed54c2 179 ip4_addr3_16(&current_iphdr_dest), ip4_addr4_16(&current_iphdr_dest)));
hlipka 0:8b387bed54c2 180 goto return_noroute;
hlipka 0:8b387bed54c2 181 }
hlipka 0:8b387bed54c2 182 /* Do not forward packets onto the same network interface on which
hlipka 0:8b387bed54c2 183 * they arrived. */
hlipka 0:8b387bed54c2 184 if (netif == inp) {
hlipka 0:8b387bed54c2 185 LWIP_DEBUGF(IP_DEBUG, ("ip_forward: not bouncing packets back on incoming interface.\n"));
hlipka 0:8b387bed54c2 186 goto return_noroute;
hlipka 0:8b387bed54c2 187 }
hlipka 0:8b387bed54c2 188
hlipka 0:8b387bed54c2 189 /* decrement TTL */
hlipka 0:8b387bed54c2 190 IPH_TTL_SET(iphdr, IPH_TTL(iphdr) - 1);
hlipka 0:8b387bed54c2 191 /* send ICMP if TTL == 0 */
hlipka 0:8b387bed54c2 192 if (IPH_TTL(iphdr) == 0) {
hlipka 0:8b387bed54c2 193 snmp_inc_ipinhdrerrors();
hlipka 0:8b387bed54c2 194 #if LWIP_ICMP
hlipka 0:8b387bed54c2 195 /* Don't send ICMP messages in response to ICMP messages */
hlipka 0:8b387bed54c2 196 if (IPH_PROTO(iphdr) != IP_PROTO_ICMP) {
hlipka 0:8b387bed54c2 197 icmp_time_exceeded(p, ICMP_TE_TTL);
hlipka 0:8b387bed54c2 198 }
hlipka 0:8b387bed54c2 199 #endif /* LWIP_ICMP */
hlipka 0:8b387bed54c2 200 return;
hlipka 0:8b387bed54c2 201 }
hlipka 0:8b387bed54c2 202
hlipka 0:8b387bed54c2 203 /* Incrementally update the IP checksum. */
hlipka 0:8b387bed54c2 204 if (IPH_CHKSUM(iphdr) >= PP_HTONS(0xffff - 0x100)) {
hlipka 0:8b387bed54c2 205 IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + PP_HTONS(0x100) + 1);
hlipka 0:8b387bed54c2 206 } else {
hlipka 0:8b387bed54c2 207 IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + PP_HTONS(0x100));
hlipka 0:8b387bed54c2 208 }
hlipka 0:8b387bed54c2 209
hlipka 0:8b387bed54c2 210 LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
hlipka 0:8b387bed54c2 211 ip4_addr1_16(&current_iphdr_dest), ip4_addr2_16(&current_iphdr_dest),
hlipka 0:8b387bed54c2 212 ip4_addr3_16(&current_iphdr_dest), ip4_addr4_16(&current_iphdr_dest)));
hlipka 0:8b387bed54c2 213
hlipka 0:8b387bed54c2 214 IP_STATS_INC(ip.fw);
hlipka 0:8b387bed54c2 215 IP_STATS_INC(ip.xmit);
hlipka 0:8b387bed54c2 216 snmp_inc_ipforwdatagrams();
hlipka 0:8b387bed54c2 217
hlipka 0:8b387bed54c2 218 PERF_STOP("ip_forward");
hlipka 0:8b387bed54c2 219 /* transmit pbuf on chosen interface */
hlipka 0:8b387bed54c2 220 netif->output(netif, p, &current_iphdr_dest);
hlipka 0:8b387bed54c2 221 return;
hlipka 0:8b387bed54c2 222 return_noroute:
hlipka 0:8b387bed54c2 223 snmp_inc_ipoutnoroutes();
hlipka 0:8b387bed54c2 224 }
hlipka 0:8b387bed54c2 225 #endif /* IP_FORWARD */
hlipka 0:8b387bed54c2 226
hlipka 0:8b387bed54c2 227 /**
hlipka 0:8b387bed54c2 228 * This function is called by the network interface device driver when
hlipka 0:8b387bed54c2 229 * an IP packet is received. The function does the basic checks of the
hlipka 0:8b387bed54c2 230 * IP header such as packet size being at least larger than the header
hlipka 0:8b387bed54c2 231 * size etc. If the packet was not destined for us, the packet is
hlipka 0:8b387bed54c2 232 * forwarded (using ip_forward). The IP checksum is always checked.
hlipka 0:8b387bed54c2 233 *
hlipka 0:8b387bed54c2 234 * Finally, the packet is sent to the upper layer protocol input function.
hlipka 0:8b387bed54c2 235 *
hlipka 0:8b387bed54c2 236 * @param p the received IP packet (p->payload points to IP header)
hlipka 0:8b387bed54c2 237 * @param inp the netif on which this packet was received
hlipka 0:8b387bed54c2 238 * @return ERR_OK if the packet was processed (could return ERR_* if it wasn't
hlipka 0:8b387bed54c2 239 * processed, but currently always returns ERR_OK)
hlipka 0:8b387bed54c2 240 */
hlipka 0:8b387bed54c2 241 err_t
hlipka 0:8b387bed54c2 242 ip_input(struct pbuf *p, struct netif *inp)
hlipka 0:8b387bed54c2 243 {
hlipka 0:8b387bed54c2 244 struct ip_hdr *iphdr;
hlipka 0:8b387bed54c2 245 struct netif *netif;
hlipka 0:8b387bed54c2 246 u16_t iphdr_hlen;
hlipka 0:8b387bed54c2 247 u16_t iphdr_len;
hlipka 0:8b387bed54c2 248 #if IP_ACCEPT_LINK_LAYER_ADDRESSING
hlipka 0:8b387bed54c2 249 int check_ip_src=1;
hlipka 0:8b387bed54c2 250 #endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING */
hlipka 0:8b387bed54c2 251
hlipka 0:8b387bed54c2 252 IP_STATS_INC(ip.recv);
hlipka 0:8b387bed54c2 253 snmp_inc_ipinreceives();
hlipka 0:8b387bed54c2 254
hlipka 0:8b387bed54c2 255 /* identify the IP header */
hlipka 0:8b387bed54c2 256 iphdr = (struct ip_hdr *)p->payload;
hlipka 0:8b387bed54c2 257 if (IPH_V(iphdr) != 4) {
hlipka 0:8b387bed54c2 258 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_WARNING, ("IP packet dropped due to bad version number %"U16_F"\n", IPH_V(iphdr)));
hlipka 0:8b387bed54c2 259 ip_debug_print(p);
hlipka 0:8b387bed54c2 260 pbuf_free(p);
hlipka 0:8b387bed54c2 261 IP_STATS_INC(ip.err);
hlipka 0:8b387bed54c2 262 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 263 snmp_inc_ipinhdrerrors();
hlipka 0:8b387bed54c2 264 return ERR_OK;
hlipka 0:8b387bed54c2 265 }
hlipka 0:8b387bed54c2 266
hlipka 0:8b387bed54c2 267 /* obtain IP header length in number of 32-bit words */
hlipka 0:8b387bed54c2 268 iphdr_hlen = IPH_HL(iphdr);
hlipka 0:8b387bed54c2 269 /* calculate IP header length in bytes */
hlipka 0:8b387bed54c2 270 iphdr_hlen *= 4;
hlipka 0:8b387bed54c2 271 /* obtain ip length in bytes */
hlipka 0:8b387bed54c2 272 iphdr_len = ntohs(IPH_LEN(iphdr));
hlipka 0:8b387bed54c2 273
hlipka 0:8b387bed54c2 274 /* header length exceeds first pbuf length, or ip length exceeds total pbuf length? */
hlipka 0:8b387bed54c2 275 if ((iphdr_hlen > p->len) || (iphdr_len > p->tot_len)) {
hlipka 0:8b387bed54c2 276 if (iphdr_hlen > p->len) {
hlipka 0:8b387bed54c2 277 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS,
hlipka 0:8b387bed54c2 278 ("IP header (len %"U16_F") does not fit in first pbuf (len %"U16_F"), IP packet dropped.\n",
hlipka 0:8b387bed54c2 279 iphdr_hlen, p->len));
hlipka 0:8b387bed54c2 280 }
hlipka 0:8b387bed54c2 281 if (iphdr_len > p->tot_len) {
hlipka 0:8b387bed54c2 282 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS,
hlipka 0:8b387bed54c2 283 ("IP (len %"U16_F") is longer than pbuf (len %"U16_F"), IP packet dropped.\n",
hlipka 0:8b387bed54c2 284 iphdr_len, p->tot_len));
hlipka 0:8b387bed54c2 285 }
hlipka 0:8b387bed54c2 286 /* free (drop) packet pbufs */
hlipka 0:8b387bed54c2 287 pbuf_free(p);
hlipka 0:8b387bed54c2 288 IP_STATS_INC(ip.lenerr);
hlipka 0:8b387bed54c2 289 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 290 snmp_inc_ipindiscards();
hlipka 0:8b387bed54c2 291 return ERR_OK;
hlipka 0:8b387bed54c2 292 }
hlipka 0:8b387bed54c2 293
hlipka 0:8b387bed54c2 294 /* verify checksum */
hlipka 0:8b387bed54c2 295 #if CHECKSUM_CHECK_IP
hlipka 0:8b387bed54c2 296 if (inet_chksum(iphdr, iphdr_hlen) != 0) {
hlipka 0:8b387bed54c2 297
hlipka 0:8b387bed54c2 298 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS,
hlipka 0:8b387bed54c2 299 ("Checksum (0x%"X16_F") failed, IP packet dropped.\n", inet_chksum(iphdr, iphdr_hlen)));
hlipka 0:8b387bed54c2 300 ip_debug_print(p);
hlipka 0:8b387bed54c2 301 pbuf_free(p);
hlipka 0:8b387bed54c2 302 IP_STATS_INC(ip.chkerr);
hlipka 0:8b387bed54c2 303 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 304 snmp_inc_ipinhdrerrors();
hlipka 0:8b387bed54c2 305 return ERR_OK;
hlipka 0:8b387bed54c2 306 }
hlipka 0:8b387bed54c2 307 #endif
hlipka 0:8b387bed54c2 308
hlipka 0:8b387bed54c2 309 /* Trim pbuf. This should have been done at the netif layer,
hlipka 0:8b387bed54c2 310 * but we'll do it anyway just to be sure that its done. */
hlipka 0:8b387bed54c2 311 pbuf_realloc(p, iphdr_len);
hlipka 0:8b387bed54c2 312
hlipka 0:8b387bed54c2 313 /* copy IP addresses to aligned ip_addr_t */
hlipka 0:8b387bed54c2 314 ip_addr_copy(current_iphdr_dest, iphdr->dest);
hlipka 0:8b387bed54c2 315 ip_addr_copy(current_iphdr_src, iphdr->src);
hlipka 0:8b387bed54c2 316
hlipka 0:8b387bed54c2 317 /* match packet against an interface, i.e. is this packet for us? */
hlipka 0:8b387bed54c2 318 #if LWIP_IGMP
hlipka 0:8b387bed54c2 319 if (ip_addr_ismulticast(&current_iphdr_dest)) {
hlipka 0:8b387bed54c2 320 if ((inp->flags & NETIF_FLAG_IGMP) && (igmp_lookfor_group(inp, &current_iphdr_dest))) {
hlipka 0:8b387bed54c2 321 netif = inp;
hlipka 0:8b387bed54c2 322 } else {
hlipka 0:8b387bed54c2 323 netif = NULL;
hlipka 0:8b387bed54c2 324 }
hlipka 0:8b387bed54c2 325 } else
hlipka 0:8b387bed54c2 326 #endif /* LWIP_IGMP */
hlipka 0:8b387bed54c2 327 {
hlipka 0:8b387bed54c2 328 /* start trying with inp. if that's not acceptable, start walking the
hlipka 0:8b387bed54c2 329 list of configured netifs.
hlipka 0:8b387bed54c2 330 'first' is used as a boolean to mark whether we started walking the list */
hlipka 0:8b387bed54c2 331 int first = 1;
hlipka 0:8b387bed54c2 332 netif = inp;
hlipka 0:8b387bed54c2 333 do {
hlipka 0:8b387bed54c2 334 LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest 0x%"X32_F" netif->ip_addr 0x%"X32_F" (0x%"X32_F", 0x%"X32_F", 0x%"X32_F")\n",
hlipka 0:8b387bed54c2 335 ip4_addr_get_u32(&iphdr->dest), ip4_addr_get_u32(&netif->ip_addr),
hlipka 0:8b387bed54c2 336 ip4_addr_get_u32(&iphdr->dest) & ip4_addr_get_u32(&netif->netmask),
hlipka 0:8b387bed54c2 337 ip4_addr_get_u32(&netif->ip_addr) & ip4_addr_get_u32(&netif->netmask),
hlipka 0:8b387bed54c2 338 ip4_addr_get_u32(&iphdr->dest) & ~ip4_addr_get_u32(&netif->netmask)));
hlipka 0:8b387bed54c2 339
hlipka 0:8b387bed54c2 340 /* interface is up and configured? */
hlipka 0:8b387bed54c2 341 if ((netif_is_up(netif)) && (!ip_addr_isany(&(netif->ip_addr)))) {
hlipka 0:8b387bed54c2 342 /* unicast to this interface address? */
hlipka 0:8b387bed54c2 343 if (ip_addr_cmp(&current_iphdr_dest, &(netif->ip_addr)) ||
hlipka 0:8b387bed54c2 344 /* or broadcast on this interface network address? */
hlipka 0:8b387bed54c2 345 ip_addr_isbroadcast(&current_iphdr_dest, netif)) {
hlipka 0:8b387bed54c2 346 LWIP_DEBUGF(IP_DEBUG, ("ip_input: packet accepted on interface %c%c\n",
hlipka 0:8b387bed54c2 347 netif->name[0], netif->name[1]));
hlipka 0:8b387bed54c2 348 /* break out of for loop */
hlipka 0:8b387bed54c2 349 break;
hlipka 0:8b387bed54c2 350 }
hlipka 0:8b387bed54c2 351 #if LWIP_AUTOIP
hlipka 0:8b387bed54c2 352 /* connections to link-local addresses must persist after changing
hlipka 0:8b387bed54c2 353 the netif's address (RFC3927 ch. 1.9) */
hlipka 0:8b387bed54c2 354 if ((netif->autoip != NULL) &&
hlipka 0:8b387bed54c2 355 ip_addr_cmp(&current_iphdr_dest, &(netif->autoip->llipaddr))) {
hlipka 0:8b387bed54c2 356 LWIP_DEBUGF(IP_DEBUG, ("ip_input: LLA packet accepted on interface %c%c\n",
hlipka 0:8b387bed54c2 357 netif->name[0], netif->name[1]));
hlipka 0:8b387bed54c2 358 /* break out of for loop */
hlipka 0:8b387bed54c2 359 break;
hlipka 0:8b387bed54c2 360 }
hlipka 0:8b387bed54c2 361 #endif /* LWIP_AUTOIP */
hlipka 0:8b387bed54c2 362 }
hlipka 0:8b387bed54c2 363 if (first) {
hlipka 0:8b387bed54c2 364 first = 0;
hlipka 0:8b387bed54c2 365 netif = netif_list;
hlipka 0:8b387bed54c2 366 } else {
hlipka 0:8b387bed54c2 367 netif = netif->next;
hlipka 0:8b387bed54c2 368 }
hlipka 0:8b387bed54c2 369 if (netif == inp) {
hlipka 0:8b387bed54c2 370 netif = netif->next;
hlipka 0:8b387bed54c2 371 }
hlipka 0:8b387bed54c2 372 } while(netif != NULL);
hlipka 0:8b387bed54c2 373 }
hlipka 0:8b387bed54c2 374
hlipka 0:8b387bed54c2 375 #if IP_ACCEPT_LINK_LAYER_ADDRESSING
hlipka 0:8b387bed54c2 376 /* Pass DHCP messages regardless of destination address. DHCP traffic is addressed
hlipka 0:8b387bed54c2 377 * using link layer addressing (such as Ethernet MAC) so we must not filter on IP.
hlipka 0:8b387bed54c2 378 * According to RFC 1542 section 3.1.1, referred by RFC 2131).
hlipka 0:8b387bed54c2 379 *
hlipka 0:8b387bed54c2 380 * If you want to accept private broadcast communication while a netif is down,
hlipka 0:8b387bed54c2 381 * define LWIP_IP_ACCEPT_UDP_PORT(dst_port), e.g.:
hlipka 0:8b387bed54c2 382 *
hlipka 0:8b387bed54c2 383 * #define LWIP_IP_ACCEPT_UDP_PORT(dst_port) ((dst_port) == PP_NTOHS(12345))
hlipka 0:8b387bed54c2 384 */
hlipka 0:8b387bed54c2 385 if (netif == NULL) {
hlipka 0:8b387bed54c2 386 /* remote port is DHCP server? */
hlipka 0:8b387bed54c2 387 if (IPH_PROTO(iphdr) == IP_PROTO_UDP) {
hlipka 0:8b387bed54c2 388 struct udp_hdr *udphdr = (struct udp_hdr *)((u8_t *)iphdr + iphdr_hlen);
hlipka 0:8b387bed54c2 389 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE, ("ip_input: UDP packet to DHCP client port %"U16_F"\n",
hlipka 0:8b387bed54c2 390 ntohs(udphdr->dest)));
hlipka 0:8b387bed54c2 391 if (IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(udphdr->dest)) {
hlipka 0:8b387bed54c2 392 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE, ("ip_input: DHCP packet accepted.\n"));
hlipka 0:8b387bed54c2 393 netif = inp;
hlipka 0:8b387bed54c2 394 check_ip_src = 0;
hlipka 0:8b387bed54c2 395 }
hlipka 0:8b387bed54c2 396 }
hlipka 0:8b387bed54c2 397 }
hlipka 0:8b387bed54c2 398 #endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING */
hlipka 0:8b387bed54c2 399
hlipka 0:8b387bed54c2 400 /* broadcast or multicast packet source address? Compliant with RFC 1122: 3.2.1.3 */
hlipka 0:8b387bed54c2 401 #if IP_ACCEPT_LINK_LAYER_ADDRESSING
hlipka 0:8b387bed54c2 402 /* DHCP servers need 0.0.0.0 to be allowed as source address (RFC 1.1.2.2: 3.2.1.3/a) */
hlipka 0:8b387bed54c2 403 if (check_ip_src && !ip_addr_isany(&current_iphdr_src))
hlipka 0:8b387bed54c2 404 #endif /* IP_ACCEPT_LINK_LAYER_ADDRESSING */
hlipka 0:8b387bed54c2 405 { if ((ip_addr_isbroadcast(&current_iphdr_src, inp)) ||
hlipka 0:8b387bed54c2 406 (ip_addr_ismulticast(&current_iphdr_src))) {
hlipka 0:8b387bed54c2 407 /* packet source is not valid */
hlipka 0:8b387bed54c2 408 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_WARNING, ("ip_input: packet source is not valid.\n"));
hlipka 0:8b387bed54c2 409 /* free (drop) packet pbufs */
hlipka 0:8b387bed54c2 410 pbuf_free(p);
hlipka 0:8b387bed54c2 411 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 412 snmp_inc_ipinaddrerrors();
hlipka 0:8b387bed54c2 413 snmp_inc_ipindiscards();
hlipka 0:8b387bed54c2 414 return ERR_OK;
hlipka 0:8b387bed54c2 415 }
hlipka 0:8b387bed54c2 416 }
hlipka 0:8b387bed54c2 417
hlipka 0:8b387bed54c2 418 /* packet not for us? */
hlipka 0:8b387bed54c2 419 if (netif == NULL) {
hlipka 0:8b387bed54c2 420 /* packet not for us, route or discard */
hlipka 0:8b387bed54c2 421 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE, ("ip_input: packet not for us.\n"));
hlipka 0:8b387bed54c2 422 #if IP_FORWARD
hlipka 0:8b387bed54c2 423 /* non-broadcast packet? */
hlipka 0:8b387bed54c2 424 if (!ip_addr_isbroadcast(&current_iphdr_dest, inp)) {
hlipka 0:8b387bed54c2 425 /* try to forward IP packet on (other) interfaces */
hlipka 0:8b387bed54c2 426 ip_forward(p, iphdr, inp);
hlipka 0:8b387bed54c2 427 } else
hlipka 0:8b387bed54c2 428 #endif /* IP_FORWARD */
hlipka 0:8b387bed54c2 429 {
hlipka 0:8b387bed54c2 430 snmp_inc_ipinaddrerrors();
hlipka 0:8b387bed54c2 431 snmp_inc_ipindiscards();
hlipka 0:8b387bed54c2 432 }
hlipka 0:8b387bed54c2 433 pbuf_free(p);
hlipka 0:8b387bed54c2 434 return ERR_OK;
hlipka 0:8b387bed54c2 435 }
hlipka 0:8b387bed54c2 436 /* packet consists of multiple fragments? */
hlipka 0:8b387bed54c2 437 if ((IPH_OFFSET(iphdr) & PP_HTONS(IP_OFFMASK | IP_MF)) != 0) {
hlipka 0:8b387bed54c2 438 #if IP_REASSEMBLY /* packet fragment reassembly code present? */
hlipka 0:8b387bed54c2 439 LWIP_DEBUGF(IP_DEBUG, ("IP packet is a fragment (id=0x%04"X16_F" tot_len=%"U16_F" len=%"U16_F" MF=%"U16_F" offset=%"U16_F"), calling ip_reass()\n",
hlipka 0:8b387bed54c2 440 ntohs(IPH_ID(iphdr)), p->tot_len, ntohs(IPH_LEN(iphdr)), !!(IPH_OFFSET(iphdr) & PP_HTONS(IP_MF)), (ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK)*8));
hlipka 0:8b387bed54c2 441 /* reassemble the packet*/
hlipka 0:8b387bed54c2 442 p = ip_reass(p);
hlipka 0:8b387bed54c2 443 /* packet not fully reassembled yet? */
hlipka 0:8b387bed54c2 444 if (p == NULL) {
hlipka 0:8b387bed54c2 445 return ERR_OK;
hlipka 0:8b387bed54c2 446 }
hlipka 0:8b387bed54c2 447 iphdr = (struct ip_hdr *)p->payload;
hlipka 0:8b387bed54c2 448 #else /* IP_REASSEMBLY == 0, no packet fragment reassembly code present */
hlipka 0:8b387bed54c2 449 pbuf_free(p);
hlipka 0:8b387bed54c2 450 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("IP packet dropped since it was fragmented (0x%"X16_F") (while IP_REASSEMBLY == 0).\n",
hlipka 0:8b387bed54c2 451 ntohs(IPH_OFFSET(iphdr))));
hlipka 0:8b387bed54c2 452 IP_STATS_INC(ip.opterr);
hlipka 0:8b387bed54c2 453 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 454 /* unsupported protocol feature */
hlipka 0:8b387bed54c2 455 snmp_inc_ipinunknownprotos();
hlipka 0:8b387bed54c2 456 return ERR_OK;
hlipka 0:8b387bed54c2 457 #endif /* IP_REASSEMBLY */
hlipka 0:8b387bed54c2 458 }
hlipka 0:8b387bed54c2 459
hlipka 0:8b387bed54c2 460 #if IP_OPTIONS_ALLOWED == 0 /* no support for IP options in the IP header? */
hlipka 0:8b387bed54c2 461
hlipka 0:8b387bed54c2 462 #if LWIP_IGMP
hlipka 0:8b387bed54c2 463 /* there is an extra "router alert" option in IGMP messages which we allow for but do not police */
hlipka 0:8b387bed54c2 464 if((iphdr_hlen > IP_HLEN) && (IPH_PROTO(iphdr) != IP_PROTO_IGMP)) {
hlipka 0:8b387bed54c2 465 #else
hlipka 0:8b387bed54c2 466 if (iphdr_hlen > IP_HLEN) {
hlipka 0:8b387bed54c2 467 #endif /* LWIP_IGMP */
hlipka 0:8b387bed54c2 468 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("IP packet dropped since there were IP options (while IP_OPTIONS_ALLOWED == 0).\n"));
hlipka 0:8b387bed54c2 469 pbuf_free(p);
hlipka 0:8b387bed54c2 470 IP_STATS_INC(ip.opterr);
hlipka 0:8b387bed54c2 471 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 472 /* unsupported protocol feature */
hlipka 0:8b387bed54c2 473 snmp_inc_ipinunknownprotos();
hlipka 0:8b387bed54c2 474 return ERR_OK;
hlipka 0:8b387bed54c2 475 }
hlipka 0:8b387bed54c2 476 #endif /* IP_OPTIONS_ALLOWED == 0 */
hlipka 0:8b387bed54c2 477
hlipka 0:8b387bed54c2 478 /* send to upper layers */
hlipka 0:8b387bed54c2 479 LWIP_DEBUGF(IP_DEBUG, ("ip_input: \n"));
hlipka 0:8b387bed54c2 480 ip_debug_print(p);
hlipka 0:8b387bed54c2 481 LWIP_DEBUGF(IP_DEBUG, ("ip_input: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len));
hlipka 0:8b387bed54c2 482
hlipka 0:8b387bed54c2 483 current_netif = inp;
hlipka 0:8b387bed54c2 484 current_header = iphdr;
hlipka 0:8b387bed54c2 485
hlipka 0:8b387bed54c2 486 #if LWIP_RAW
hlipka 0:8b387bed54c2 487 /* raw input did not eat the packet? */
hlipka 0:8b387bed54c2 488 if (raw_input(p, inp) == 0)
hlipka 0:8b387bed54c2 489 #endif /* LWIP_RAW */
hlipka 0:8b387bed54c2 490 {
hlipka 0:8b387bed54c2 491
hlipka 0:8b387bed54c2 492 switch (IPH_PROTO(iphdr)) {
hlipka 0:8b387bed54c2 493 #if LWIP_UDP
hlipka 0:8b387bed54c2 494 case IP_PROTO_UDP:
hlipka 0:8b387bed54c2 495 #if LWIP_UDPLITE
hlipka 0:8b387bed54c2 496 case IP_PROTO_UDPLITE:
hlipka 0:8b387bed54c2 497 #endif /* LWIP_UDPLITE */
hlipka 0:8b387bed54c2 498 snmp_inc_ipindelivers();
hlipka 0:8b387bed54c2 499 udp_input(p, inp);
hlipka 0:8b387bed54c2 500 break;
hlipka 0:8b387bed54c2 501 #endif /* LWIP_UDP */
hlipka 0:8b387bed54c2 502 #if LWIP_TCP
hlipka 0:8b387bed54c2 503 case IP_PROTO_TCP:
hlipka 0:8b387bed54c2 504 snmp_inc_ipindelivers();
hlipka 0:8b387bed54c2 505 tcp_input(p, inp);
hlipka 0:8b387bed54c2 506 break;
hlipka 0:8b387bed54c2 507 #endif /* LWIP_TCP */
hlipka 0:8b387bed54c2 508 #if LWIP_ICMP
hlipka 0:8b387bed54c2 509 case IP_PROTO_ICMP:
hlipka 0:8b387bed54c2 510 snmp_inc_ipindelivers();
hlipka 0:8b387bed54c2 511 icmp_input(p, inp);
hlipka 0:8b387bed54c2 512 break;
hlipka 0:8b387bed54c2 513 #endif /* LWIP_ICMP */
hlipka 0:8b387bed54c2 514 #if LWIP_IGMP
hlipka 0:8b387bed54c2 515 case IP_PROTO_IGMP:
hlipka 0:8b387bed54c2 516 igmp_input(p, inp, &current_iphdr_dest);
hlipka 0:8b387bed54c2 517 break;
hlipka 0:8b387bed54c2 518 #endif /* LWIP_IGMP */
hlipka 0:8b387bed54c2 519 default:
hlipka 0:8b387bed54c2 520 #if LWIP_ICMP
hlipka 0:8b387bed54c2 521 /* send ICMP destination protocol unreachable unless is was a broadcast */
hlipka 0:8b387bed54c2 522 if (!ip_addr_isbroadcast(&current_iphdr_dest, inp) &&
hlipka 0:8b387bed54c2 523 !ip_addr_ismulticast(&current_iphdr_dest)) {
hlipka 0:8b387bed54c2 524 p->payload = iphdr;
hlipka 0:8b387bed54c2 525 icmp_dest_unreach(p, ICMP_DUR_PROTO);
hlipka 0:8b387bed54c2 526 }
hlipka 0:8b387bed54c2 527 #endif /* LWIP_ICMP */
hlipka 0:8b387bed54c2 528 pbuf_free(p);
hlipka 0:8b387bed54c2 529
hlipka 0:8b387bed54c2 530 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("Unsupported transport protocol %"U16_F"\n", IPH_PROTO(iphdr)));
hlipka 0:8b387bed54c2 531
hlipka 0:8b387bed54c2 532 IP_STATS_INC(ip.proterr);
hlipka 0:8b387bed54c2 533 IP_STATS_INC(ip.drop);
hlipka 0:8b387bed54c2 534 snmp_inc_ipinunknownprotos();
hlipka 0:8b387bed54c2 535 }
hlipka 0:8b387bed54c2 536 }
hlipka 0:8b387bed54c2 537
hlipka 0:8b387bed54c2 538 current_netif = NULL;
hlipka 0:8b387bed54c2 539 current_header = NULL;
hlipka 0:8b387bed54c2 540 ip_addr_set_any(&current_iphdr_src);
hlipka 0:8b387bed54c2 541 ip_addr_set_any(&current_iphdr_dest);
hlipka 0:8b387bed54c2 542
hlipka 0:8b387bed54c2 543 return ERR_OK;
hlipka 0:8b387bed54c2 544 }
hlipka 0:8b387bed54c2 545
hlipka 0:8b387bed54c2 546 /**
hlipka 0:8b387bed54c2 547 * Sends an IP packet on a network interface. This function constructs
hlipka 0:8b387bed54c2 548 * the IP header and calculates the IP header checksum. If the source
hlipka 0:8b387bed54c2 549 * IP address is NULL, the IP address of the outgoing network
hlipka 0:8b387bed54c2 550 * interface is filled in as source address.
hlipka 0:8b387bed54c2 551 * If the destination IP address is IP_HDRINCL, p is assumed to already
hlipka 0:8b387bed54c2 552 * include an IP header and p->payload points to it instead of the data.
hlipka 0:8b387bed54c2 553 *
hlipka 0:8b387bed54c2 554 * @param p the packet to send (p->payload points to the data, e.g. next
hlipka 0:8b387bed54c2 555 protocol header; if dest == IP_HDRINCL, p already includes an IP
hlipka 0:8b387bed54c2 556 header and p->payload points to that IP header)
hlipka 0:8b387bed54c2 557 * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
hlipka 0:8b387bed54c2 558 * IP address of the netif used to send is used as source address)
hlipka 0:8b387bed54c2 559 * @param dest the destination IP address to send the packet to
hlipka 0:8b387bed54c2 560 * @param ttl the TTL value to be set in the IP header
hlipka 0:8b387bed54c2 561 * @param tos the TOS value to be set in the IP header
hlipka 0:8b387bed54c2 562 * @param proto the PROTOCOL to be set in the IP header
hlipka 0:8b387bed54c2 563 * @param netif the netif on which to send this packet
hlipka 0:8b387bed54c2 564 * @return ERR_OK if the packet was sent OK
hlipka 0:8b387bed54c2 565 * ERR_BUF if p doesn't have enough space for IP/LINK headers
hlipka 0:8b387bed54c2 566 * returns errors returned by netif->output
hlipka 0:8b387bed54c2 567 *
hlipka 0:8b387bed54c2 568 * @note ip_id: RFC791 "some host may be able to simply use
hlipka 0:8b387bed54c2 569 * unique identifiers independent of destination"
hlipka 0:8b387bed54c2 570 */
hlipka 0:8b387bed54c2 571 err_t
hlipka 0:8b387bed54c2 572 ip_output_if(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
hlipka 0:8b387bed54c2 573 u8_t ttl, u8_t tos,
hlipka 0:8b387bed54c2 574 u8_t proto, struct netif *netif)
hlipka 0:8b387bed54c2 575 {
hlipka 0:8b387bed54c2 576 #if IP_OPTIONS_SEND
hlipka 0:8b387bed54c2 577 return ip_output_if_opt(p, src, dest, ttl, tos, proto, netif, NULL, 0);
hlipka 0:8b387bed54c2 578 }
hlipka 0:8b387bed54c2 579
hlipka 0:8b387bed54c2 580 /**
hlipka 0:8b387bed54c2 581 * Same as ip_output_if() but with the possibility to include IP options:
hlipka 0:8b387bed54c2 582 *
hlipka 0:8b387bed54c2 583 * @ param ip_options pointer to the IP options, copied into the IP header
hlipka 0:8b387bed54c2 584 * @ param optlen length of ip_options
hlipka 0:8b387bed54c2 585 */
hlipka 0:8b387bed54c2 586 err_t ip_output_if_opt(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
hlipka 0:8b387bed54c2 587 u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
hlipka 0:8b387bed54c2 588 u16_t optlen)
hlipka 0:8b387bed54c2 589 {
hlipka 0:8b387bed54c2 590 #endif /* IP_OPTIONS_SEND */
hlipka 0:8b387bed54c2 591 struct ip_hdr *iphdr;
hlipka 0:8b387bed54c2 592 ip_addr_t dest_addr;
hlipka 0:8b387bed54c2 593 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 594 u32_t chk_sum = 0;
hlipka 0:8b387bed54c2 595 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 596
hlipka 0:8b387bed54c2 597 /* pbufs passed to IP must have a ref-count of 1 as their payload pointer
hlipka 0:8b387bed54c2 598 gets altered as the packet is passed down the stack */
hlipka 0:8b387bed54c2 599 LWIP_ASSERT("p->ref == 1", p->ref == 1);
hlipka 0:8b387bed54c2 600
hlipka 0:8b387bed54c2 601 snmp_inc_ipoutrequests();
hlipka 0:8b387bed54c2 602
hlipka 0:8b387bed54c2 603 /* Should the IP header be generated or is it already included in p? */
hlipka 0:8b387bed54c2 604 if (dest != IP_HDRINCL) {
hlipka 0:8b387bed54c2 605 u16_t ip_hlen = IP_HLEN;
hlipka 0:8b387bed54c2 606 #if IP_OPTIONS_SEND
hlipka 0:8b387bed54c2 607 u16_t optlen_aligned = 0;
hlipka 0:8b387bed54c2 608 if (optlen != 0) {
hlipka 0:8b387bed54c2 609 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 610 int i;
hlipka 0:8b387bed54c2 611 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 612 /* round up to a multiple of 4 */
hlipka 0:8b387bed54c2 613 optlen_aligned = ((optlen + 3) & ~3);
hlipka 0:8b387bed54c2 614 ip_hlen += optlen_aligned;
hlipka 0:8b387bed54c2 615 /* First write in the IP options */
hlipka 0:8b387bed54c2 616 if (pbuf_header(p, optlen_aligned)) {
hlipka 0:8b387bed54c2 617 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip_output_if_opt: not enough room for IP options in pbuf\n"));
hlipka 0:8b387bed54c2 618 IP_STATS_INC(ip.err);
hlipka 0:8b387bed54c2 619 snmp_inc_ipoutdiscards();
hlipka 0:8b387bed54c2 620 return ERR_BUF;
hlipka 0:8b387bed54c2 621 }
hlipka 0:8b387bed54c2 622 MEMCPY(p->payload, ip_options, optlen);
hlipka 0:8b387bed54c2 623 if (optlen < optlen_aligned) {
hlipka 0:8b387bed54c2 624 /* zero the remaining bytes */
hlipka 0:8b387bed54c2 625 memset(((char*)p->payload) + optlen, 0, optlen_aligned - optlen);
hlipka 0:8b387bed54c2 626 }
hlipka 0:8b387bed54c2 627 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 628 for (i = 0; i < optlen_aligned; i += sizeof(u16_t)) {
hlipka 0:8b387bed54c2 629 chk_sum += ((u16_t*)p->payload)[i];
hlipka 0:8b387bed54c2 630 }
hlipka 0:8b387bed54c2 631 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 632 }
hlipka 0:8b387bed54c2 633 #endif /* IP_OPTIONS_SEND */
hlipka 0:8b387bed54c2 634 /* generate IP header */
hlipka 0:8b387bed54c2 635 if (pbuf_header(p, IP_HLEN)) {
hlipka 0:8b387bed54c2 636 LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip_output: not enough room for IP header in pbuf\n"));
hlipka 0:8b387bed54c2 637
hlipka 0:8b387bed54c2 638 IP_STATS_INC(ip.err);
hlipka 0:8b387bed54c2 639 snmp_inc_ipoutdiscards();
hlipka 0:8b387bed54c2 640 return ERR_BUF;
hlipka 0:8b387bed54c2 641 }
hlipka 0:8b387bed54c2 642
hlipka 0:8b387bed54c2 643 iphdr = (struct ip_hdr *)p->payload;
hlipka 0:8b387bed54c2 644 LWIP_ASSERT("check that first pbuf can hold struct ip_hdr",
hlipka 0:8b387bed54c2 645 (p->len >= sizeof(struct ip_hdr)));
hlipka 0:8b387bed54c2 646
hlipka 0:8b387bed54c2 647 IPH_TTL_SET(iphdr, ttl);
hlipka 0:8b387bed54c2 648 IPH_PROTO_SET(iphdr, proto);
hlipka 0:8b387bed54c2 649 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 650 chk_sum += LWIP_MAKE_U16(proto, ttl);
hlipka 0:8b387bed54c2 651 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 652
hlipka 0:8b387bed54c2 653 /* dest cannot be NULL here */
hlipka 0:8b387bed54c2 654 ip_addr_copy(iphdr->dest, *dest);
hlipka 0:8b387bed54c2 655 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 656 chk_sum += ip4_addr_get_u32(&iphdr->dest) & 0xFFFF;
hlipka 0:8b387bed54c2 657 chk_sum += ip4_addr_get_u32(&iphdr->dest) >> 16;
hlipka 0:8b387bed54c2 658 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 659
hlipka 0:8b387bed54c2 660 IPH_VHLTOS_SET(iphdr, 4, ip_hlen / 4, tos);
hlipka 0:8b387bed54c2 661 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 662 chk_sum += iphdr->_v_hl_tos;
hlipka 0:8b387bed54c2 663 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 664 IPH_LEN_SET(iphdr, htons(p->tot_len));
hlipka 0:8b387bed54c2 665 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 666 chk_sum += iphdr->_len;
hlipka 0:8b387bed54c2 667 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 668 IPH_OFFSET_SET(iphdr, 0);
hlipka 0:8b387bed54c2 669 IPH_ID_SET(iphdr, htons(ip_id));
hlipka 0:8b387bed54c2 670 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 671 chk_sum += iphdr->_id;
hlipka 0:8b387bed54c2 672 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 673 ++ip_id;
hlipka 0:8b387bed54c2 674
hlipka 0:8b387bed54c2 675 if (ip_addr_isany(src)) {
hlipka 0:8b387bed54c2 676 ip_addr_copy(iphdr->src, netif->ip_addr);
hlipka 0:8b387bed54c2 677 } else {
hlipka 0:8b387bed54c2 678 /* src cannot be NULL here */
hlipka 0:8b387bed54c2 679 ip_addr_copy(iphdr->src, *src);
hlipka 0:8b387bed54c2 680 }
hlipka 0:8b387bed54c2 681
hlipka 0:8b387bed54c2 682 #if CHECKSUM_GEN_IP_INLINE
hlipka 0:8b387bed54c2 683 chk_sum += ip4_addr_get_u32(&iphdr->src) & 0xFFFF;
hlipka 0:8b387bed54c2 684 chk_sum += ip4_addr_get_u32(&iphdr->src) >> 16;
hlipka 0:8b387bed54c2 685 chk_sum = (chk_sum >> 16) + (chk_sum & 0xFFFF);
hlipka 0:8b387bed54c2 686 chk_sum = (chk_sum >> 16) + chk_sum;
hlipka 0:8b387bed54c2 687 chk_sum = ~chk_sum;
hlipka 0:8b387bed54c2 688 iphdr->_chksum = chk_sum; /* network order */
hlipka 0:8b387bed54c2 689 #else /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 690 IPH_CHKSUM_SET(iphdr, 0);
hlipka 0:8b387bed54c2 691 #if CHECKSUM_GEN_IP
hlipka 0:8b387bed54c2 692 IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, ip_hlen));
hlipka 0:8b387bed54c2 693 #endif
hlipka 0:8b387bed54c2 694 #endif /* CHECKSUM_GEN_IP_INLINE */
hlipka 0:8b387bed54c2 695 } else {
hlipka 0:8b387bed54c2 696 /* IP header already included in p */
hlipka 0:8b387bed54c2 697 iphdr = (struct ip_hdr *)p->payload;
hlipka 0:8b387bed54c2 698 ip_addr_copy(dest_addr, iphdr->dest);
hlipka 0:8b387bed54c2 699 dest = &dest_addr;
hlipka 0:8b387bed54c2 700 }
hlipka 0:8b387bed54c2 701
hlipka 0:8b387bed54c2 702 IP_STATS_INC(ip.xmit);
hlipka 0:8b387bed54c2 703
hlipka 0:8b387bed54c2 704 LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c%"U16_F"\n", netif->name[0], netif->name[1], netif->num));
hlipka 0:8b387bed54c2 705 ip_debug_print(p);
hlipka 0:8b387bed54c2 706
hlipka 0:8b387bed54c2 707 #if ENABLE_LOOPBACK
hlipka 0:8b387bed54c2 708 if (ip_addr_cmp(dest, &netif->ip_addr)) {
hlipka 0:8b387bed54c2 709 /* Packet to self, enqueue it for loopback */
hlipka 0:8b387bed54c2 710 LWIP_DEBUGF(IP_DEBUG, ("netif_loop_output()"));
hlipka 0:8b387bed54c2 711 return netif_loop_output(netif, p, dest);
hlipka 0:8b387bed54c2 712 }
hlipka 0:8b387bed54c2 713 #if LWIP_IGMP
hlipka 0:8b387bed54c2 714 if ((p->flags & PBUF_FLAG_MCASTLOOP) != 0) {
hlipka 0:8b387bed54c2 715 netif_loop_output(netif, p, dest);
hlipka 0:8b387bed54c2 716 }
hlipka 0:8b387bed54c2 717 #endif /* LWIP_IGMP */
hlipka 0:8b387bed54c2 718 #endif /* ENABLE_LOOPBACK */
hlipka 0:8b387bed54c2 719 #if IP_FRAG
hlipka 0:8b387bed54c2 720 /* don't fragment if interface has mtu set to 0 [loopif] */
hlipka 0:8b387bed54c2 721 if (netif->mtu && (p->tot_len > netif->mtu)) {
hlipka 0:8b387bed54c2 722 return ip_frag(p, netif, dest);
hlipka 0:8b387bed54c2 723 }
hlipka 0:8b387bed54c2 724 #endif /* IP_FRAG */
hlipka 0:8b387bed54c2 725
hlipka 0:8b387bed54c2 726 LWIP_DEBUGF(IP_DEBUG, ("netif->output()"));
hlipka 0:8b387bed54c2 727 return netif->output(netif, p, dest);
hlipka 0:8b387bed54c2 728 }
hlipka 0:8b387bed54c2 729
hlipka 0:8b387bed54c2 730 /**
hlipka 0:8b387bed54c2 731 * Simple interface to ip_output_if. It finds the outgoing network
hlipka 0:8b387bed54c2 732 * interface and calls upon ip_output_if to do the actual work.
hlipka 0:8b387bed54c2 733 *
hlipka 0:8b387bed54c2 734 * @param p the packet to send (p->payload points to the data, e.g. next
hlipka 0:8b387bed54c2 735 protocol header; if dest == IP_HDRINCL, p already includes an IP
hlipka 0:8b387bed54c2 736 header and p->payload points to that IP header)
hlipka 0:8b387bed54c2 737 * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
hlipka 0:8b387bed54c2 738 * IP address of the netif used to send is used as source address)
hlipka 0:8b387bed54c2 739 * @param dest the destination IP address to send the packet to
hlipka 0:8b387bed54c2 740 * @param ttl the TTL value to be set in the IP header
hlipka 0:8b387bed54c2 741 * @param tos the TOS value to be set in the IP header
hlipka 0:8b387bed54c2 742 * @param proto the PROTOCOL to be set in the IP header
hlipka 0:8b387bed54c2 743 *
hlipka 0:8b387bed54c2 744 * @return ERR_RTE if no route is found
hlipka 0:8b387bed54c2 745 * see ip_output_if() for more return values
hlipka 0:8b387bed54c2 746 */
hlipka 0:8b387bed54c2 747 err_t
hlipka 0:8b387bed54c2 748 ip_output(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
hlipka 0:8b387bed54c2 749 u8_t ttl, u8_t tos, u8_t proto)
hlipka 0:8b387bed54c2 750 {
hlipka 0:8b387bed54c2 751 struct netif *netif;
hlipka 0:8b387bed54c2 752
hlipka 0:8b387bed54c2 753 /* pbufs passed to IP must have a ref-count of 1 as their payload pointer
hlipka 0:8b387bed54c2 754 gets altered as the packet is passed down the stack */
hlipka 0:8b387bed54c2 755 LWIP_ASSERT("p->ref == 1", p->ref == 1);
hlipka 0:8b387bed54c2 756
hlipka 0:8b387bed54c2 757 if ((netif = ip_route(dest)) == NULL) {
hlipka 0:8b387bed54c2 758 LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
hlipka 0:8b387bed54c2 759 ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));
hlipka 0:8b387bed54c2 760 IP_STATS_INC(ip.rterr);
hlipka 0:8b387bed54c2 761 return ERR_RTE;
hlipka 0:8b387bed54c2 762 }
hlipka 0:8b387bed54c2 763
hlipka 0:8b387bed54c2 764 return ip_output_if(p, src, dest, ttl, tos, proto, netif);
hlipka 0:8b387bed54c2 765 }
hlipka 0:8b387bed54c2 766
hlipka 0:8b387bed54c2 767 #if LWIP_NETIF_HWADDRHINT
hlipka 0:8b387bed54c2 768 /** Like ip_output, but takes and addr_hint pointer that is passed on to netif->addr_hint
hlipka 0:8b387bed54c2 769 * before calling ip_output_if.
hlipka 0:8b387bed54c2 770 *
hlipka 0:8b387bed54c2 771 * @param p the packet to send (p->payload points to the data, e.g. next
hlipka 0:8b387bed54c2 772 protocol header; if dest == IP_HDRINCL, p already includes an IP
hlipka 0:8b387bed54c2 773 header and p->payload points to that IP header)
hlipka 0:8b387bed54c2 774 * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
hlipka 0:8b387bed54c2 775 * IP address of the netif used to send is used as source address)
hlipka 0:8b387bed54c2 776 * @param dest the destination IP address to send the packet to
hlipka 0:8b387bed54c2 777 * @param ttl the TTL value to be set in the IP header
hlipka 0:8b387bed54c2 778 * @param tos the TOS value to be set in the IP header
hlipka 0:8b387bed54c2 779 * @param proto the PROTOCOL to be set in the IP header
hlipka 0:8b387bed54c2 780 * @param addr_hint address hint pointer set to netif->addr_hint before
hlipka 0:8b387bed54c2 781 * calling ip_output_if()
hlipka 0:8b387bed54c2 782 *
hlipka 0:8b387bed54c2 783 * @return ERR_RTE if no route is found
hlipka 0:8b387bed54c2 784 * see ip_output_if() for more return values
hlipka 0:8b387bed54c2 785 */
hlipka 0:8b387bed54c2 786 err_t
hlipka 0:8b387bed54c2 787 ip_output_hinted(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
hlipka 0:8b387bed54c2 788 u8_t ttl, u8_t tos, u8_t proto, u8_t *addr_hint)
hlipka 0:8b387bed54c2 789 {
hlipka 0:8b387bed54c2 790 struct netif *netif;
hlipka 0:8b387bed54c2 791 err_t err;
hlipka 0:8b387bed54c2 792
hlipka 0:8b387bed54c2 793 /* pbufs passed to IP must have a ref-count of 1 as their payload pointer
hlipka 0:8b387bed54c2 794 gets altered as the packet is passed down the stack */
hlipka 0:8b387bed54c2 795 LWIP_ASSERT("p->ref == 1", p->ref == 1);
hlipka 0:8b387bed54c2 796
hlipka 0:8b387bed54c2 797 if ((netif = ip_route(dest)) == NULL) {
hlipka 0:8b387bed54c2 798 LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
hlipka 0:8b387bed54c2 799 ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));
hlipka 0:8b387bed54c2 800 IP_STATS_INC(ip.rterr);
hlipka 0:8b387bed54c2 801 return ERR_RTE;
hlipka 0:8b387bed54c2 802 }
hlipka 0:8b387bed54c2 803
hlipka 0:8b387bed54c2 804 netif->addr_hint = addr_hint;
hlipka 0:8b387bed54c2 805 err = ip_output_if(p, src, dest, ttl, tos, proto, netif);
hlipka 0:8b387bed54c2 806 netif->addr_hint = NULL;
hlipka 0:8b387bed54c2 807
hlipka 0:8b387bed54c2 808 return err;
hlipka 0:8b387bed54c2 809 }
hlipka 0:8b387bed54c2 810 #endif /* LWIP_NETIF_HWADDRHINT*/
hlipka 0:8b387bed54c2 811
hlipka 0:8b387bed54c2 812 #if IP_DEBUG
hlipka 0:8b387bed54c2 813 /* Print an IP header by using LWIP_DEBUGF
hlipka 0:8b387bed54c2 814 * @param p an IP packet, p->payload pointing to the IP header
hlipka 0:8b387bed54c2 815 */
hlipka 0:8b387bed54c2 816 void
hlipka 0:8b387bed54c2 817 ip_debug_print(struct pbuf *p)
hlipka 0:8b387bed54c2 818 {
hlipka 0:8b387bed54c2 819 struct ip_hdr *iphdr = (struct ip_hdr *)p->payload;
hlipka 0:8b387bed54c2 820 u8_t *payload;
hlipka 0:8b387bed54c2 821
hlipka 0:8b387bed54c2 822 payload = (u8_t *)iphdr + IP_HLEN;
hlipka 0:8b387bed54c2 823
hlipka 0:8b387bed54c2 824 LWIP_DEBUGF(IP_DEBUG, ("IP header:\n"));
hlipka 0:8b387bed54c2 825 LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
hlipka 0:8b387bed54c2 826 LWIP_DEBUGF(IP_DEBUG, ("|%2"S16_F" |%2"S16_F" | 0x%02"X16_F" | %5"U16_F" | (v, hl, tos, len)\n",
hlipka 0:8b387bed54c2 827 IPH_V(iphdr),
hlipka 0:8b387bed54c2 828 IPH_HL(iphdr),
hlipka 0:8b387bed54c2 829 IPH_TOS(iphdr),
hlipka 0:8b387bed54c2 830 ntohs(IPH_LEN(iphdr))));
hlipka 0:8b387bed54c2 831 LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
hlipka 0:8b387bed54c2 832 LWIP_DEBUGF(IP_DEBUG, ("| %5"U16_F" |%"U16_F"%"U16_F"%"U16_F"| %4"U16_F" | (id, flags, offset)\n",
hlipka 0:8b387bed54c2 833 ntohs(IPH_ID(iphdr)),
hlipka 0:8b387bed54c2 834 ntohs(IPH_OFFSET(iphdr)) >> 15 & 1,
hlipka 0:8b387bed54c2 835 ntohs(IPH_OFFSET(iphdr)) >> 14 & 1,
hlipka 0:8b387bed54c2 836 ntohs(IPH_OFFSET(iphdr)) >> 13 & 1,
hlipka 0:8b387bed54c2 837 ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK));
hlipka 0:8b387bed54c2 838 LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
hlipka 0:8b387bed54c2 839 LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | 0x%04"X16_F" | (ttl, proto, chksum)\n",
hlipka 0:8b387bed54c2 840 IPH_TTL(iphdr),
hlipka 0:8b387bed54c2 841 IPH_PROTO(iphdr),
hlipka 0:8b387bed54c2 842 ntohs(IPH_CHKSUM(iphdr))));
hlipka 0:8b387bed54c2 843 LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
hlipka 0:8b387bed54c2 844 LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | %3"U16_F" | %3"U16_F" | (src)\n",
hlipka 0:8b387bed54c2 845 ip4_addr1_16(&iphdr->src),
hlipka 0:8b387bed54c2 846 ip4_addr2_16(&iphdr->src),
hlipka 0:8b387bed54c2 847 ip4_addr3_16(&iphdr->src),
hlipka 0:8b387bed54c2 848 ip4_addr4_16(&iphdr->src)));
hlipka 0:8b387bed54c2 849 LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
hlipka 0:8b387bed54c2 850 LWIP_DEBUGF(IP_DEBUG, ("| %3"U16_F" | %3"U16_F" | %3"U16_F" | %3"U16_F" | (dest)\n",
hlipka 0:8b387bed54c2 851 ip4_addr1_16(&iphdr->dest),
hlipka 0:8b387bed54c2 852 ip4_addr2_16(&iphdr->dest),
hlipka 0:8b387bed54c2 853 ip4_addr3_16(&iphdr->dest),
hlipka 0:8b387bed54c2 854 ip4_addr4_16(&iphdr->dest)));
hlipka 0:8b387bed54c2 855 LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
hlipka 0:8b387bed54c2 856 }
hlipka 0:8b387bed54c2 857 #endif /* IP_DEBUG */