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lwip/core/netif.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /**
grzemich 0:d7bd7384a37c 2 * @file
grzemich 0:d7bd7384a37c 3 * lwIP network interface abstraction
grzemich 0:d7bd7384a37c 4 *
grzemich 0:d7bd7384a37c 5 */
grzemich 0:d7bd7384a37c 6
grzemich 0:d7bd7384a37c 7 /*
grzemich 0:d7bd7384a37c 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
grzemich 0:d7bd7384a37c 9 * All rights reserved.
grzemich 0:d7bd7384a37c 10 *
grzemich 0:d7bd7384a37c 11 * Redistribution and use in source and binary forms, with or without modification,
grzemich 0:d7bd7384a37c 12 * are permitted provided that the following conditions are met:
grzemich 0:d7bd7384a37c 13 *
grzemich 0:d7bd7384a37c 14 * 1. Redistributions of source code must retain the above copyright notice,
grzemich 0:d7bd7384a37c 15 * this list of conditions and the following disclaimer.
grzemich 0:d7bd7384a37c 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
grzemich 0:d7bd7384a37c 17 * this list of conditions and the following disclaimer in the documentation
grzemich 0:d7bd7384a37c 18 * and/or other materials provided with the distribution.
grzemich 0:d7bd7384a37c 19 * 3. The name of the author may not be used to endorse or promote products
grzemich 0:d7bd7384a37c 20 * derived from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 21 *
grzemich 0:d7bd7384a37c 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
grzemich 0:d7bd7384a37c 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
grzemich 0:d7bd7384a37c 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
grzemich 0:d7bd7384a37c 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
grzemich 0:d7bd7384a37c 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
grzemich 0:d7bd7384a37c 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
grzemich 0:d7bd7384a37c 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
grzemich 0:d7bd7384a37c 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
grzemich 0:d7bd7384a37c 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
grzemich 0:d7bd7384a37c 31 * OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 32 *
grzemich 0:d7bd7384a37c 33 * This file is part of the lwIP TCP/IP stack.
grzemich 0:d7bd7384a37c 34 *
grzemich 0:d7bd7384a37c 35 * Author: Adam Dunkels <adam@sics.se>
grzemich 0:d7bd7384a37c 36 *
grzemich 0:d7bd7384a37c 37 */
grzemich 0:d7bd7384a37c 38
grzemich 0:d7bd7384a37c 39 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 40
grzemich 0:d7bd7384a37c 41 #include "lwip/def.h"
grzemich 0:d7bd7384a37c 42 #include "lwip/ip_addr.h"
grzemich 0:d7bd7384a37c 43 #include "lwip/netif.h"
grzemich 0:d7bd7384a37c 44 #include "lwip/tcp_impl.h"
grzemich 0:d7bd7384a37c 45 #include "lwip/snmp.h"
grzemich 0:d7bd7384a37c 46 #include "lwip/igmp.h"
grzemich 0:d7bd7384a37c 47 #include "netif/etharp.h"
grzemich 0:d7bd7384a37c 48 #include "lwip/stats.h"
grzemich 0:d7bd7384a37c 49 #if ENABLE_LOOPBACK
grzemich 0:d7bd7384a37c 50 #include "lwip/sys.h"
grzemich 0:d7bd7384a37c 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
grzemich 0:d7bd7384a37c 52 #include "lwip/tcpip.h"
grzemich 0:d7bd7384a37c 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
grzemich 0:d7bd7384a37c 54 #endif /* ENABLE_LOOPBACK */
grzemich 0:d7bd7384a37c 55
grzemich 0:d7bd7384a37c 56 #if LWIP_AUTOIP
grzemich 0:d7bd7384a37c 57 #include "lwip/autoip.h"
grzemich 0:d7bd7384a37c 58 #endif /* LWIP_AUTOIP */
grzemich 0:d7bd7384a37c 59 #if LWIP_DHCP
grzemich 0:d7bd7384a37c 60 #include "lwip/dhcp.h"
grzemich 0:d7bd7384a37c 61 #endif /* LWIP_DHCP */
grzemich 0:d7bd7384a37c 62
grzemich 0:d7bd7384a37c 63 #if LWIP_NETIF_STATUS_CALLBACK
grzemich 0:d7bd7384a37c 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
grzemich 0:d7bd7384a37c 65 #else
grzemich 0:d7bd7384a37c 66 #define NETIF_STATUS_CALLBACK(n)
grzemich 0:d7bd7384a37c 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
grzemich 0:d7bd7384a37c 68
grzemich 0:d7bd7384a37c 69 #if LWIP_NETIF_LINK_CALLBACK
grzemich 0:d7bd7384a37c 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
grzemich 0:d7bd7384a37c 71 #else
grzemich 0:d7bd7384a37c 72 #define NETIF_LINK_CALLBACK(n)
grzemich 0:d7bd7384a37c 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
grzemich 0:d7bd7384a37c 74
grzemich 0:d7bd7384a37c 75 struct netif *netif_list;
grzemich 0:d7bd7384a37c 76 struct netif *netif_default;
grzemich 0:d7bd7384a37c 77
grzemich 0:d7bd7384a37c 78 #if LWIP_HAVE_LOOPIF
grzemich 0:d7bd7384a37c 79 static struct netif loop_netif;
grzemich 0:d7bd7384a37c 80
grzemich 0:d7bd7384a37c 81 /**
grzemich 0:d7bd7384a37c 82 * Initialize a lwip network interface structure for a loopback interface
grzemich 0:d7bd7384a37c 83 *
grzemich 0:d7bd7384a37c 84 * @param netif the lwip network interface structure for this loopif
grzemich 0:d7bd7384a37c 85 * @return ERR_OK if the loopif is initialized
grzemich 0:d7bd7384a37c 86 * ERR_MEM if private data couldn't be allocated
grzemich 0:d7bd7384a37c 87 */
grzemich 0:d7bd7384a37c 88 static err_t
grzemich 0:d7bd7384a37c 89 netif_loopif_init(struct netif *netif)
grzemich 0:d7bd7384a37c 90 {
grzemich 0:d7bd7384a37c 91 /* initialize the snmp variables and counters inside the struct netif
grzemich 0:d7bd7384a37c 92 * ifSpeed: no assumption can be made!
grzemich 0:d7bd7384a37c 93 */
grzemich 0:d7bd7384a37c 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
grzemich 0:d7bd7384a37c 95
grzemich 0:d7bd7384a37c 96 netif->name[0] = 'l';
grzemich 0:d7bd7384a37c 97 netif->name[1] = 'o';
grzemich 0:d7bd7384a37c 98 netif->output = netif_loop_output;
grzemich 0:d7bd7384a37c 99 return ERR_OK;
grzemich 0:d7bd7384a37c 100 }
grzemich 0:d7bd7384a37c 101 #endif /* LWIP_HAVE_LOOPIF */
grzemich 0:d7bd7384a37c 102
grzemich 0:d7bd7384a37c 103 void
grzemich 0:d7bd7384a37c 104 netif_init(void)
grzemich 0:d7bd7384a37c 105 {
grzemich 0:d7bd7384a37c 106 #if LWIP_HAVE_LOOPIF
grzemich 0:d7bd7384a37c 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
grzemich 0:d7bd7384a37c 108 IP4_ADDR(&loop_gw, 127,0,0,1);
grzemich 0:d7bd7384a37c 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
grzemich 0:d7bd7384a37c 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
grzemich 0:d7bd7384a37c 111
grzemich 0:d7bd7384a37c 112 #if NO_SYS
grzemich 0:d7bd7384a37c 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
grzemich 0:d7bd7384a37c 114 #else /* NO_SYS */
grzemich 0:d7bd7384a37c 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
grzemich 0:d7bd7384a37c 116 #endif /* NO_SYS */
grzemich 0:d7bd7384a37c 117 netif_set_up(&loop_netif);
grzemich 0:d7bd7384a37c 118
grzemich 0:d7bd7384a37c 119 #endif /* LWIP_HAVE_LOOPIF */
grzemich 0:d7bd7384a37c 120 }
grzemich 0:d7bd7384a37c 121
grzemich 0:d7bd7384a37c 122 /**
grzemich 0:d7bd7384a37c 123 * Add a network interface to the list of lwIP netifs.
grzemich 0:d7bd7384a37c 124 *
grzemich 0:d7bd7384a37c 125 * @param netif a pre-allocated netif structure
grzemich 0:d7bd7384a37c 126 * @param ipaddr IP address for the new netif
grzemich 0:d7bd7384a37c 127 * @param netmask network mask for the new netif
grzemich 0:d7bd7384a37c 128 * @param gw default gateway IP address for the new netif
grzemich 0:d7bd7384a37c 129 * @param state opaque data passed to the new netif
grzemich 0:d7bd7384a37c 130 * @param init callback function that initializes the interface
grzemich 0:d7bd7384a37c 131 * @param input callback function that is called to pass
grzemich 0:d7bd7384a37c 132 * ingress packets up in the protocol layer stack.
grzemich 0:d7bd7384a37c 133 *
grzemich 0:d7bd7384a37c 134 * @return netif, or NULL if failed.
grzemich 0:d7bd7384a37c 135 */
grzemich 0:d7bd7384a37c 136 struct netif *
grzemich 0:d7bd7384a37c 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
grzemich 0:d7bd7384a37c 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
grzemich 0:d7bd7384a37c 139 {
grzemich 0:d7bd7384a37c 140 static u8_t netifnum = 0;
grzemich 0:d7bd7384a37c 141
grzemich 0:d7bd7384a37c 142 LWIP_ASSERT("No init function given", init != NULL);
grzemich 0:d7bd7384a37c 143
grzemich 0:d7bd7384a37c 144 /* reset new interface configuration state */
grzemich 0:d7bd7384a37c 145 ip_addr_set_zero(&netif->ip_addr);
grzemich 0:d7bd7384a37c 146 ip_addr_set_zero(&netif->netmask);
grzemich 0:d7bd7384a37c 147 ip_addr_set_zero(&netif->gw);
grzemich 0:d7bd7384a37c 148 netif->flags = 0;
grzemich 0:d7bd7384a37c 149 #if LWIP_DHCP
grzemich 0:d7bd7384a37c 150 /* netif not under DHCP control by default */
grzemich 0:d7bd7384a37c 151 netif->dhcp = NULL;
grzemich 0:d7bd7384a37c 152 #endif /* LWIP_DHCP */
grzemich 0:d7bd7384a37c 153 #if LWIP_AUTOIP
grzemich 0:d7bd7384a37c 154 /* netif not under AutoIP control by default */
grzemich 0:d7bd7384a37c 155 netif->autoip = NULL;
grzemich 0:d7bd7384a37c 156 #endif /* LWIP_AUTOIP */
grzemich 0:d7bd7384a37c 157 #if LWIP_NETIF_STATUS_CALLBACK
grzemich 0:d7bd7384a37c 158 netif->status_callback = NULL;
grzemich 0:d7bd7384a37c 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
grzemich 0:d7bd7384a37c 160 #if LWIP_NETIF_LINK_CALLBACK
grzemich 0:d7bd7384a37c 161 netif->link_callback = NULL;
grzemich 0:d7bd7384a37c 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
grzemich 0:d7bd7384a37c 163 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 164 netif->igmp_mac_filter = NULL;
grzemich 0:d7bd7384a37c 165 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 166 #if ENABLE_LOOPBACK
grzemich 0:d7bd7384a37c 167 netif->loop_first = NULL;
grzemich 0:d7bd7384a37c 168 netif->loop_last = NULL;
grzemich 0:d7bd7384a37c 169 #endif /* ENABLE_LOOPBACK */
grzemich 0:d7bd7384a37c 170
grzemich 0:d7bd7384a37c 171 /* remember netif specific state information data */
grzemich 0:d7bd7384a37c 172 netif->state = state;
grzemich 0:d7bd7384a37c 173 netif->num = netifnum++;
grzemich 0:d7bd7384a37c 174 netif->input = input;
grzemich 0:d7bd7384a37c 175 #if LWIP_NETIF_HWADDRHINT
grzemich 0:d7bd7384a37c 176 netif->addr_hint = NULL;
grzemich 0:d7bd7384a37c 177 #endif /* LWIP_NETIF_HWADDRHINT*/
grzemich 0:d7bd7384a37c 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
grzemich 0:d7bd7384a37c 179 netif->loop_cnt_current = 0;
grzemich 0:d7bd7384a37c 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
grzemich 0:d7bd7384a37c 181
grzemich 0:d7bd7384a37c 182 netif_set_addr(netif, ipaddr, netmask, gw);
grzemich 0:d7bd7384a37c 183
grzemich 0:d7bd7384a37c 184 /* call user specified initialization function for netif */
grzemich 0:d7bd7384a37c 185 if (init(netif) != ERR_OK) {
grzemich 0:d7bd7384a37c 186 return NULL;
grzemich 0:d7bd7384a37c 187 }
grzemich 0:d7bd7384a37c 188
grzemich 0:d7bd7384a37c 189 /* add this netif to the list */
grzemich 0:d7bd7384a37c 190 netif->next = netif_list;
grzemich 0:d7bd7384a37c 191 netif_list = netif;
grzemich 0:d7bd7384a37c 192 snmp_inc_iflist();
grzemich 0:d7bd7384a37c 193
grzemich 0:d7bd7384a37c 194 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 195 /* start IGMP processing */
grzemich 0:d7bd7384a37c 196 if (netif->flags & NETIF_FLAG_IGMP) {
grzemich 0:d7bd7384a37c 197 igmp_start(netif);
grzemich 0:d7bd7384a37c 198 }
grzemich 0:d7bd7384a37c 199 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 200
grzemich 0:d7bd7384a37c 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
grzemich 0:d7bd7384a37c 202 netif->name[0], netif->name[1]));
grzemich 0:d7bd7384a37c 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
grzemich 0:d7bd7384a37c 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
grzemich 0:d7bd7384a37c 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
grzemich 0:d7bd7384a37c 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
grzemich 0:d7bd7384a37c 207 ip_addr_debug_print(NETIF_DEBUG, gw);
grzemich 0:d7bd7384a37c 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
grzemich 0:d7bd7384a37c 209 return netif;
grzemich 0:d7bd7384a37c 210 }
grzemich 0:d7bd7384a37c 211
grzemich 0:d7bd7384a37c 212 /**
grzemich 0:d7bd7384a37c 213 * Change IP address configuration for a network interface (including netmask
grzemich 0:d7bd7384a37c 214 * and default gateway).
grzemich 0:d7bd7384a37c 215 *
grzemich 0:d7bd7384a37c 216 * @param netif the network interface to change
grzemich 0:d7bd7384a37c 217 * @param ipaddr the new IP address
grzemich 0:d7bd7384a37c 218 * @param netmask the new netmask
grzemich 0:d7bd7384a37c 219 * @param gw the new default gateway
grzemich 0:d7bd7384a37c 220 */
grzemich 0:d7bd7384a37c 221 void
grzemich 0:d7bd7384a37c 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
grzemich 0:d7bd7384a37c 223 ip_addr_t *gw)
grzemich 0:d7bd7384a37c 224 {
grzemich 0:d7bd7384a37c 225 netif_set_ipaddr(netif, ipaddr);
grzemich 0:d7bd7384a37c 226 netif_set_netmask(netif, netmask);
grzemich 0:d7bd7384a37c 227 netif_set_gw(netif, gw);
grzemich 0:d7bd7384a37c 228 }
grzemich 0:d7bd7384a37c 229
grzemich 0:d7bd7384a37c 230 /**
grzemich 0:d7bd7384a37c 231 * Remove a network interface from the list of lwIP netifs.
grzemich 0:d7bd7384a37c 232 *
grzemich 0:d7bd7384a37c 233 * @param netif the network interface to remove
grzemich 0:d7bd7384a37c 234 */
grzemich 0:d7bd7384a37c 235 void
grzemich 0:d7bd7384a37c 236 netif_remove(struct netif *netif)
grzemich 0:d7bd7384a37c 237 {
grzemich 0:d7bd7384a37c 238 if (netif == NULL) {
grzemich 0:d7bd7384a37c 239 return;
grzemich 0:d7bd7384a37c 240 }
grzemich 0:d7bd7384a37c 241
grzemich 0:d7bd7384a37c 242 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 243 /* stop IGMP processing */
grzemich 0:d7bd7384a37c 244 if (netif->flags & NETIF_FLAG_IGMP) {
grzemich 0:d7bd7384a37c 245 igmp_stop(netif);
grzemich 0:d7bd7384a37c 246 }
grzemich 0:d7bd7384a37c 247 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 248 if (netif_is_up(netif)) {
grzemich 0:d7bd7384a37c 249 /* set netif down before removing (call callback function) */
grzemich 0:d7bd7384a37c 250 netif_set_down(netif);
grzemich 0:d7bd7384a37c 251 }
grzemich 0:d7bd7384a37c 252
grzemich 0:d7bd7384a37c 253 snmp_delete_ipaddridx_tree(netif);
grzemich 0:d7bd7384a37c 254
grzemich 0:d7bd7384a37c 255 /* is it the first netif? */
grzemich 0:d7bd7384a37c 256 if (netif_list == netif) {
grzemich 0:d7bd7384a37c 257 netif_list = netif->next;
grzemich 0:d7bd7384a37c 258 } else {
grzemich 0:d7bd7384a37c 259 /* look for netif further down the list */
grzemich 0:d7bd7384a37c 260 struct netif * tmpNetif;
grzemich 0:d7bd7384a37c 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
grzemich 0:d7bd7384a37c 262 if (tmpNetif->next == netif) {
grzemich 0:d7bd7384a37c 263 tmpNetif->next = netif->next;
grzemich 0:d7bd7384a37c 264 break;
grzemich 0:d7bd7384a37c 265 }
grzemich 0:d7bd7384a37c 266 }
grzemich 0:d7bd7384a37c 267 if (tmpNetif == NULL)
grzemich 0:d7bd7384a37c 268 return; /* we didn't find any netif today */
grzemich 0:d7bd7384a37c 269 }
grzemich 0:d7bd7384a37c 270 snmp_dec_iflist();
grzemich 0:d7bd7384a37c 271 /* this netif is default? */
grzemich 0:d7bd7384a37c 272 if (netif_default == netif) {
grzemich 0:d7bd7384a37c 273 /* reset default netif */
grzemich 0:d7bd7384a37c 274 netif_set_default(NULL);
grzemich 0:d7bd7384a37c 275 }
grzemich 0:d7bd7384a37c 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
grzemich 0:d7bd7384a37c 277 }
grzemich 0:d7bd7384a37c 278
grzemich 0:d7bd7384a37c 279 /**
grzemich 0:d7bd7384a37c 280 * Find a network interface by searching for its name
grzemich 0:d7bd7384a37c 281 *
grzemich 0:d7bd7384a37c 282 * @param name the name of the netif (like netif->name) plus concatenated number
grzemich 0:d7bd7384a37c 283 * in ascii representation (e.g. 'en0')
grzemich 0:d7bd7384a37c 284 */
grzemich 0:d7bd7384a37c 285 struct netif *
grzemich 0:d7bd7384a37c 286 netif_find(char *name)
grzemich 0:d7bd7384a37c 287 {
grzemich 0:d7bd7384a37c 288 struct netif *netif;
grzemich 0:d7bd7384a37c 289 u8_t num;
grzemich 0:d7bd7384a37c 290
grzemich 0:d7bd7384a37c 291 if (name == NULL) {
grzemich 0:d7bd7384a37c 292 return NULL;
grzemich 0:d7bd7384a37c 293 }
grzemich 0:d7bd7384a37c 294
grzemich 0:d7bd7384a37c 295 num = name[2] - '0';
grzemich 0:d7bd7384a37c 296
grzemich 0:d7bd7384a37c 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
grzemich 0:d7bd7384a37c 298 if (num == netif->num &&
grzemich 0:d7bd7384a37c 299 name[0] == netif->name[0] &&
grzemich 0:d7bd7384a37c 300 name[1] == netif->name[1]) {
grzemich 0:d7bd7384a37c 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
grzemich 0:d7bd7384a37c 302 return netif;
grzemich 0:d7bd7384a37c 303 }
grzemich 0:d7bd7384a37c 304 }
grzemich 0:d7bd7384a37c 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
grzemich 0:d7bd7384a37c 306 return NULL;
grzemich 0:d7bd7384a37c 307 }
grzemich 0:d7bd7384a37c 308
grzemich 0:d7bd7384a37c 309 /**
grzemich 0:d7bd7384a37c 310 * Change the IP address of a network interface
grzemich 0:d7bd7384a37c 311 *
grzemich 0:d7bd7384a37c 312 * @param netif the network interface to change
grzemich 0:d7bd7384a37c 313 * @param ipaddr the new IP address
grzemich 0:d7bd7384a37c 314 *
grzemich 0:d7bd7384a37c 315 * @note call netif_set_addr() if you also want to change netmask and
grzemich 0:d7bd7384a37c 316 * default gateway
grzemich 0:d7bd7384a37c 317 */
grzemich 0:d7bd7384a37c 318 void
grzemich 0:d7bd7384a37c 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
grzemich 0:d7bd7384a37c 320 {
grzemich 0:d7bd7384a37c 321 /* Protect against dereferencing NULL pointers by
grzemich 0:d7bd7384a37c 322 treating like ANY, as does ip_addr_set() */
grzemich 0:d7bd7384a37c 323 if (!ipaddr) {
grzemich 0:d7bd7384a37c 324 ipaddr = IP_ADDR_ANY;
grzemich 0:d7bd7384a37c 325 }
grzemich 0:d7bd7384a37c 326
grzemich 0:d7bd7384a37c 327 /* TODO: Handling of obsolete pcbs */
grzemich 0:d7bd7384a37c 328 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
grzemich 0:d7bd7384a37c 329 #if LWIP_TCP
grzemich 0:d7bd7384a37c 330 struct tcp_pcb *pcb;
grzemich 0:d7bd7384a37c 331 struct tcp_pcb_listen *lpcb;
grzemich 0:d7bd7384a37c 332
grzemich 0:d7bd7384a37c 333 /* address is actually being changed? */
grzemich 0:d7bd7384a37c 334 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
grzemich 0:d7bd7384a37c 335 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
grzemich 0:d7bd7384a37c 336 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
grzemich 0:d7bd7384a37c 337 pcb = tcp_active_pcbs;
grzemich 0:d7bd7384a37c 338 while (pcb != NULL) {
grzemich 0:d7bd7384a37c 339 /* PCB bound to current local interface address? */
grzemich 0:d7bd7384a37c 340 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
grzemich 0:d7bd7384a37c 341 #if LWIP_AUTOIP
grzemich 0:d7bd7384a37c 342 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
grzemich 0:d7bd7384a37c 343 && !ip_addr_islinklocal(&(pcb->local_ip))
grzemich 0:d7bd7384a37c 344 #endif /* LWIP_AUTOIP */
grzemich 0:d7bd7384a37c 345 ) {
grzemich 0:d7bd7384a37c 346 /* this connection must be aborted */
grzemich 0:d7bd7384a37c 347 struct tcp_pcb *next = pcb->next;
grzemich 0:d7bd7384a37c 348 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
grzemich 0:d7bd7384a37c 349 tcp_abort(pcb);
grzemich 0:d7bd7384a37c 350 pcb = next;
grzemich 0:d7bd7384a37c 351 } else {
grzemich 0:d7bd7384a37c 352 pcb = pcb->next;
grzemich 0:d7bd7384a37c 353 }
grzemich 0:d7bd7384a37c 354 }
grzemich 0:d7bd7384a37c 355 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
grzemich 0:d7bd7384a37c 356 /* PCB bound to current local interface address? */
grzemich 0:d7bd7384a37c 357 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
grzemich 0:d7bd7384a37c 358 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
grzemich 0:d7bd7384a37c 359 /* The PCB is listening to the old ipaddr and
grzemich 0:d7bd7384a37c 360 * is set to listen to the new one instead */
grzemich 0:d7bd7384a37c 361 ip_addr_set(&(lpcb->local_ip), ipaddr);
grzemich 0:d7bd7384a37c 362 }
grzemich 0:d7bd7384a37c 363 }
grzemich 0:d7bd7384a37c 364 }
grzemich 0:d7bd7384a37c 365 #endif
grzemich 0:d7bd7384a37c 366 snmp_delete_ipaddridx_tree(netif);
grzemich 0:d7bd7384a37c 367 snmp_delete_iprteidx_tree(0,netif);
grzemich 0:d7bd7384a37c 368 /* set new IP address to netif */
grzemich 0:d7bd7384a37c 369 ip_addr_set(&(netif->ip_addr), ipaddr);
grzemich 0:d7bd7384a37c 370 snmp_insert_ipaddridx_tree(netif);
grzemich 0:d7bd7384a37c 371 snmp_insert_iprteidx_tree(0,netif);
grzemich 0:d7bd7384a37c 372
grzemich 0:d7bd7384a37c 373 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
grzemich 0:d7bd7384a37c 374 netif->name[0], netif->name[1],
grzemich 0:d7bd7384a37c 375 ip4_addr1_16(&netif->ip_addr),
grzemich 0:d7bd7384a37c 376 ip4_addr2_16(&netif->ip_addr),
grzemich 0:d7bd7384a37c 377 ip4_addr3_16(&netif->ip_addr),
grzemich 0:d7bd7384a37c 378 ip4_addr4_16(&netif->ip_addr)));
grzemich 0:d7bd7384a37c 379 }
grzemich 0:d7bd7384a37c 380
grzemich 0:d7bd7384a37c 381 /**
grzemich 0:d7bd7384a37c 382 * Change the default gateway for a network interface
grzemich 0:d7bd7384a37c 383 *
grzemich 0:d7bd7384a37c 384 * @param netif the network interface to change
grzemich 0:d7bd7384a37c 385 * @param gw the new default gateway
grzemich 0:d7bd7384a37c 386 *
grzemich 0:d7bd7384a37c 387 * @note call netif_set_addr() if you also want to change ip address and netmask
grzemich 0:d7bd7384a37c 388 */
grzemich 0:d7bd7384a37c 389 void
grzemich 0:d7bd7384a37c 390 netif_set_gw(struct netif *netif, ip_addr_t *gw)
grzemich 0:d7bd7384a37c 391 {
grzemich 0:d7bd7384a37c 392 ip_addr_set(&(netif->gw), gw);
grzemich 0:d7bd7384a37c 393 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
grzemich 0:d7bd7384a37c 394 netif->name[0], netif->name[1],
grzemich 0:d7bd7384a37c 395 ip4_addr1_16(&netif->gw),
grzemich 0:d7bd7384a37c 396 ip4_addr2_16(&netif->gw),
grzemich 0:d7bd7384a37c 397 ip4_addr3_16(&netif->gw),
grzemich 0:d7bd7384a37c 398 ip4_addr4_16(&netif->gw)));
grzemich 0:d7bd7384a37c 399 }
grzemich 0:d7bd7384a37c 400
grzemich 0:d7bd7384a37c 401 /**
grzemich 0:d7bd7384a37c 402 * Change the netmask of a network interface
grzemich 0:d7bd7384a37c 403 *
grzemich 0:d7bd7384a37c 404 * @param netif the network interface to change
grzemich 0:d7bd7384a37c 405 * @param netmask the new netmask
grzemich 0:d7bd7384a37c 406 *
grzemich 0:d7bd7384a37c 407 * @note call netif_set_addr() if you also want to change ip address and
grzemich 0:d7bd7384a37c 408 * default gateway
grzemich 0:d7bd7384a37c 409 */
grzemich 0:d7bd7384a37c 410 void
grzemich 0:d7bd7384a37c 411 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
grzemich 0:d7bd7384a37c 412 {
grzemich 0:d7bd7384a37c 413 snmp_delete_iprteidx_tree(0, netif);
grzemich 0:d7bd7384a37c 414 /* set new netmask to netif */
grzemich 0:d7bd7384a37c 415 ip_addr_set(&(netif->netmask), netmask);
grzemich 0:d7bd7384a37c 416 snmp_insert_iprteidx_tree(0, netif);
grzemich 0:d7bd7384a37c 417 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
grzemich 0:d7bd7384a37c 418 netif->name[0], netif->name[1],
grzemich 0:d7bd7384a37c 419 ip4_addr1_16(&netif->netmask),
grzemich 0:d7bd7384a37c 420 ip4_addr2_16(&netif->netmask),
grzemich 0:d7bd7384a37c 421 ip4_addr3_16(&netif->netmask),
grzemich 0:d7bd7384a37c 422 ip4_addr4_16(&netif->netmask)));
grzemich 0:d7bd7384a37c 423 }
grzemich 0:d7bd7384a37c 424
grzemich 0:d7bd7384a37c 425 /**
grzemich 0:d7bd7384a37c 426 * Set a network interface as the default network interface
grzemich 0:d7bd7384a37c 427 * (used to output all packets for which no specific route is found)
grzemich 0:d7bd7384a37c 428 *
grzemich 0:d7bd7384a37c 429 * @param netif the default network interface
grzemich 0:d7bd7384a37c 430 */
grzemich 0:d7bd7384a37c 431 void
grzemich 0:d7bd7384a37c 432 netif_set_default(struct netif *netif)
grzemich 0:d7bd7384a37c 433 {
grzemich 0:d7bd7384a37c 434 if (netif == NULL) {
grzemich 0:d7bd7384a37c 435 /* remove default route */
grzemich 0:d7bd7384a37c 436 snmp_delete_iprteidx_tree(1, netif);
grzemich 0:d7bd7384a37c 437 } else {
grzemich 0:d7bd7384a37c 438 /* install default route */
grzemich 0:d7bd7384a37c 439 snmp_insert_iprteidx_tree(1, netif);
grzemich 0:d7bd7384a37c 440 }
grzemich 0:d7bd7384a37c 441 netif_default = netif;
grzemich 0:d7bd7384a37c 442 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
grzemich 0:d7bd7384a37c 443 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
grzemich 0:d7bd7384a37c 444 }
grzemich 0:d7bd7384a37c 445
grzemich 0:d7bd7384a37c 446 /**
grzemich 0:d7bd7384a37c 447 * Bring an interface up, available for processing
grzemich 0:d7bd7384a37c 448 * traffic.
grzemich 0:d7bd7384a37c 449 *
grzemich 0:d7bd7384a37c 450 * @note: Enabling DHCP on a down interface will make it come
grzemich 0:d7bd7384a37c 451 * up once configured.
grzemich 0:d7bd7384a37c 452 *
grzemich 0:d7bd7384a37c 453 * @see dhcp_start()
grzemich 0:d7bd7384a37c 454 */
grzemich 0:d7bd7384a37c 455 void netif_set_up(struct netif *netif)
grzemich 0:d7bd7384a37c 456 {
grzemich 0:d7bd7384a37c 457 if (!(netif->flags & NETIF_FLAG_UP)) {
grzemich 0:d7bd7384a37c 458 netif->flags |= NETIF_FLAG_UP;
grzemich 0:d7bd7384a37c 459
grzemich 0:d7bd7384a37c 460 #if LWIP_SNMP
grzemich 0:d7bd7384a37c 461 snmp_get_sysuptime(&netif->ts);
grzemich 0:d7bd7384a37c 462 #endif /* LWIP_SNMP */
grzemich 0:d7bd7384a37c 463
grzemich 0:d7bd7384a37c 464 NETIF_STATUS_CALLBACK(netif);
grzemich 0:d7bd7384a37c 465
grzemich 0:d7bd7384a37c 466 if (netif->flags & NETIF_FLAG_LINK_UP) {
grzemich 0:d7bd7384a37c 467 #if LWIP_ARP
grzemich 0:d7bd7384a37c 468 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
grzemich 0:d7bd7384a37c 469 if (netif->flags & (NETIF_FLAG_ETHARP)) {
grzemich 0:d7bd7384a37c 470 etharp_gratuitous(netif);
grzemich 0:d7bd7384a37c 471 }
grzemich 0:d7bd7384a37c 472 #endif /* LWIP_ARP */
grzemich 0:d7bd7384a37c 473
grzemich 0:d7bd7384a37c 474 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 475 /* resend IGMP memberships */
grzemich 0:d7bd7384a37c 476 if (netif->flags & NETIF_FLAG_IGMP) {
grzemich 0:d7bd7384a37c 477 igmp_report_groups( netif);
grzemich 0:d7bd7384a37c 478 }
grzemich 0:d7bd7384a37c 479 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 480 }
grzemich 0:d7bd7384a37c 481 }
grzemich 0:d7bd7384a37c 482 }
grzemich 0:d7bd7384a37c 483
grzemich 0:d7bd7384a37c 484 /**
grzemich 0:d7bd7384a37c 485 * Bring an interface down, disabling any traffic processing.
grzemich 0:d7bd7384a37c 486 *
grzemich 0:d7bd7384a37c 487 * @note: Enabling DHCP on a down interface will make it come
grzemich 0:d7bd7384a37c 488 * up once configured.
grzemich 0:d7bd7384a37c 489 *
grzemich 0:d7bd7384a37c 490 * @see dhcp_start()
grzemich 0:d7bd7384a37c 491 */
grzemich 0:d7bd7384a37c 492 void netif_set_down(struct netif *netif)
grzemich 0:d7bd7384a37c 493 {
grzemich 0:d7bd7384a37c 494 if (netif->flags & NETIF_FLAG_UP) {
grzemich 0:d7bd7384a37c 495 netif->flags &= ~NETIF_FLAG_UP;
grzemich 0:d7bd7384a37c 496 #if LWIP_SNMP
grzemich 0:d7bd7384a37c 497 snmp_get_sysuptime(&netif->ts);
grzemich 0:d7bd7384a37c 498 #endif
grzemich 0:d7bd7384a37c 499
grzemich 0:d7bd7384a37c 500 NETIF_STATUS_CALLBACK(netif);
grzemich 0:d7bd7384a37c 501 }
grzemich 0:d7bd7384a37c 502 }
grzemich 0:d7bd7384a37c 503
grzemich 0:d7bd7384a37c 504 #if LWIP_NETIF_STATUS_CALLBACK
grzemich 0:d7bd7384a37c 505 /**
grzemich 0:d7bd7384a37c 506 * Set callback to be called when interface is brought up/down
grzemich 0:d7bd7384a37c 507 */
grzemich 0:d7bd7384a37c 508 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
grzemich 0:d7bd7384a37c 509 {
grzemich 0:d7bd7384a37c 510 if (netif) {
grzemich 0:d7bd7384a37c 511 netif->status_callback = status_callback;
grzemich 0:d7bd7384a37c 512 }
grzemich 0:d7bd7384a37c 513 }
grzemich 0:d7bd7384a37c 514 #endif /* LWIP_NETIF_STATUS_CALLBACK */
grzemich 0:d7bd7384a37c 515
grzemich 0:d7bd7384a37c 516 /**
grzemich 0:d7bd7384a37c 517 * Called by a driver when its link goes up
grzemich 0:d7bd7384a37c 518 */
grzemich 0:d7bd7384a37c 519 void netif_set_link_up(struct netif *netif )
grzemich 0:d7bd7384a37c 520 {
grzemich 0:d7bd7384a37c 521 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
grzemich 0:d7bd7384a37c 522 netif->flags |= NETIF_FLAG_LINK_UP;
grzemich 0:d7bd7384a37c 523
grzemich 0:d7bd7384a37c 524 #if LWIP_DHCP
grzemich 0:d7bd7384a37c 525 if (netif->dhcp) {
grzemich 0:d7bd7384a37c 526 dhcp_network_changed(netif);
grzemich 0:d7bd7384a37c 527 }
grzemich 0:d7bd7384a37c 528 #endif /* LWIP_DHCP */
grzemich 0:d7bd7384a37c 529
grzemich 0:d7bd7384a37c 530 #if LWIP_AUTOIP
grzemich 0:d7bd7384a37c 531 if (netif->autoip) {
grzemich 0:d7bd7384a37c 532 autoip_network_changed(netif);
grzemich 0:d7bd7384a37c 533 }
grzemich 0:d7bd7384a37c 534 #endif /* LWIP_AUTOIP */
grzemich 0:d7bd7384a37c 535
grzemich 0:d7bd7384a37c 536 if (netif->flags & NETIF_FLAG_UP) {
grzemich 0:d7bd7384a37c 537 #if LWIP_ARP
grzemich 0:d7bd7384a37c 538 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
grzemich 0:d7bd7384a37c 539 if (netif->flags & NETIF_FLAG_ETHARP) {
grzemich 0:d7bd7384a37c 540 etharp_gratuitous(netif);
grzemich 0:d7bd7384a37c 541 }
grzemich 0:d7bd7384a37c 542 #endif /* LWIP_ARP */
grzemich 0:d7bd7384a37c 543
grzemich 0:d7bd7384a37c 544 #if LWIP_IGMP
grzemich 0:d7bd7384a37c 545 /* resend IGMP memberships */
grzemich 0:d7bd7384a37c 546 if (netif->flags & NETIF_FLAG_IGMP) {
grzemich 0:d7bd7384a37c 547 igmp_report_groups( netif);
grzemich 0:d7bd7384a37c 548 }
grzemich 0:d7bd7384a37c 549 #endif /* LWIP_IGMP */
grzemich 0:d7bd7384a37c 550 }
grzemich 0:d7bd7384a37c 551 NETIF_LINK_CALLBACK(netif);
grzemich 0:d7bd7384a37c 552 }
grzemich 0:d7bd7384a37c 553 }
grzemich 0:d7bd7384a37c 554
grzemich 0:d7bd7384a37c 555 /**
grzemich 0:d7bd7384a37c 556 * Called by a driver when its link goes down
grzemich 0:d7bd7384a37c 557 */
grzemich 0:d7bd7384a37c 558 void netif_set_link_down(struct netif *netif )
grzemich 0:d7bd7384a37c 559 {
grzemich 0:d7bd7384a37c 560 if (netif->flags & NETIF_FLAG_LINK_UP) {
grzemich 0:d7bd7384a37c 561 netif->flags &= ~NETIF_FLAG_LINK_UP;
grzemich 0:d7bd7384a37c 562 NETIF_LINK_CALLBACK(netif);
grzemich 0:d7bd7384a37c 563 }
grzemich 0:d7bd7384a37c 564 }
grzemich 0:d7bd7384a37c 565
grzemich 0:d7bd7384a37c 566 #if LWIP_NETIF_LINK_CALLBACK
grzemich 0:d7bd7384a37c 567 /**
grzemich 0:d7bd7384a37c 568 * Set callback to be called when link is brought up/down
grzemich 0:d7bd7384a37c 569 */
grzemich 0:d7bd7384a37c 570 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
grzemich 0:d7bd7384a37c 571 {
grzemich 0:d7bd7384a37c 572 if (netif) {
grzemich 0:d7bd7384a37c 573 netif->link_callback = link_callback;
grzemich 0:d7bd7384a37c 574 }
grzemich 0:d7bd7384a37c 575 }
grzemich 0:d7bd7384a37c 576 #endif /* LWIP_NETIF_LINK_CALLBACK */
grzemich 0:d7bd7384a37c 577
grzemich 0:d7bd7384a37c 578 #if ENABLE_LOOPBACK
grzemich 0:d7bd7384a37c 579 /**
grzemich 0:d7bd7384a37c 580 * Send an IP packet to be received on the same netif (loopif-like).
grzemich 0:d7bd7384a37c 581 * The pbuf is simply copied and handed back to netif->input.
grzemich 0:d7bd7384a37c 582 * In multithreaded mode, this is done directly since netif->input must put
grzemich 0:d7bd7384a37c 583 * the packet on a queue.
grzemich 0:d7bd7384a37c 584 * In callback mode, the packet is put on an internal queue and is fed to
grzemich 0:d7bd7384a37c 585 * netif->input by netif_poll().
grzemich 0:d7bd7384a37c 586 *
grzemich 0:d7bd7384a37c 587 * @param netif the lwip network interface structure
grzemich 0:d7bd7384a37c 588 * @param p the (IP) packet to 'send'
grzemich 0:d7bd7384a37c 589 * @param ipaddr the ip address to send the packet to (not used)
grzemich 0:d7bd7384a37c 590 * @return ERR_OK if the packet has been sent
grzemich 0:d7bd7384a37c 591 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
grzemich 0:d7bd7384a37c 592 */
grzemich 0:d7bd7384a37c 593 err_t
grzemich 0:d7bd7384a37c 594 netif_loop_output(struct netif *netif, struct pbuf *p,
grzemich 0:d7bd7384a37c 595 ip_addr_t *ipaddr)
grzemich 0:d7bd7384a37c 596 {
grzemich 0:d7bd7384a37c 597 struct pbuf *r;
grzemich 0:d7bd7384a37c 598 err_t err;
grzemich 0:d7bd7384a37c 599 struct pbuf *last;
grzemich 0:d7bd7384a37c 600 #if LWIP_LOOPBACK_MAX_PBUFS
grzemich 0:d7bd7384a37c 601 u8_t clen = 0;
grzemich 0:d7bd7384a37c 602 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
grzemich 0:d7bd7384a37c 603 /* If we have a loopif, SNMP counters are adjusted for it,
grzemich 0:d7bd7384a37c 604 * if not they are adjusted for 'netif'. */
grzemich 0:d7bd7384a37c 605 #if LWIP_SNMP
grzemich 0:d7bd7384a37c 606 #if LWIP_HAVE_LOOPIF
grzemich 0:d7bd7384a37c 607 struct netif *stats_if = &loop_netif;
grzemich 0:d7bd7384a37c 608 #else /* LWIP_HAVE_LOOPIF */
grzemich 0:d7bd7384a37c 609 struct netif *stats_if = netif;
grzemich 0:d7bd7384a37c 610 #endif /* LWIP_HAVE_LOOPIF */
grzemich 0:d7bd7384a37c 611 #endif /* LWIP_SNMP */
grzemich 0:d7bd7384a37c 612 SYS_ARCH_DECL_PROTECT(lev);
grzemich 0:d7bd7384a37c 613 LWIP_UNUSED_ARG(ipaddr);
grzemich 0:d7bd7384a37c 614
grzemich 0:d7bd7384a37c 615 /* Allocate a new pbuf */
grzemich 0:d7bd7384a37c 616 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
grzemich 0:d7bd7384a37c 617 if (r == NULL) {
grzemich 0:d7bd7384a37c 618 LINK_STATS_INC(link.memerr);
grzemich 0:d7bd7384a37c 619 LINK_STATS_INC(link.drop);
grzemich 0:d7bd7384a37c 620 snmp_inc_ifoutdiscards(stats_if);
grzemich 0:d7bd7384a37c 621 return ERR_MEM;
grzemich 0:d7bd7384a37c 622 }
grzemich 0:d7bd7384a37c 623 #if LWIP_LOOPBACK_MAX_PBUFS
grzemich 0:d7bd7384a37c 624 clen = pbuf_clen(r);
grzemich 0:d7bd7384a37c 625 /* check for overflow or too many pbuf on queue */
grzemich 0:d7bd7384a37c 626 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
grzemich 0:d7bd7384a37c 627 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
grzemich 0:d7bd7384a37c 628 pbuf_free(r);
grzemich 0:d7bd7384a37c 629 LINK_STATS_INC(link.memerr);
grzemich 0:d7bd7384a37c 630 LINK_STATS_INC(link.drop);
grzemich 0:d7bd7384a37c 631 snmp_inc_ifoutdiscards(stats_if);
grzemich 0:d7bd7384a37c 632 return ERR_MEM;
grzemich 0:d7bd7384a37c 633 }
grzemich 0:d7bd7384a37c 634 netif->loop_cnt_current += clen;
grzemich 0:d7bd7384a37c 635 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
grzemich 0:d7bd7384a37c 636
grzemich 0:d7bd7384a37c 637 /* Copy the whole pbuf queue p into the single pbuf r */
grzemich 0:d7bd7384a37c 638 if ((err = pbuf_copy(r, p)) != ERR_OK) {
grzemich 0:d7bd7384a37c 639 pbuf_free(r);
grzemich 0:d7bd7384a37c 640 LINK_STATS_INC(link.memerr);
grzemich 0:d7bd7384a37c 641 LINK_STATS_INC(link.drop);
grzemich 0:d7bd7384a37c 642 snmp_inc_ifoutdiscards(stats_if);
grzemich 0:d7bd7384a37c 643 return err;
grzemich 0:d7bd7384a37c 644 }
grzemich 0:d7bd7384a37c 645
grzemich 0:d7bd7384a37c 646 /* Put the packet on a linked list which gets emptied through calling
grzemich 0:d7bd7384a37c 647 netif_poll(). */
grzemich 0:d7bd7384a37c 648
grzemich 0:d7bd7384a37c 649 /* let last point to the last pbuf in chain r */
grzemich 0:d7bd7384a37c 650 for (last = r; last->next != NULL; last = last->next);
grzemich 0:d7bd7384a37c 651
grzemich 0:d7bd7384a37c 652 SYS_ARCH_PROTECT(lev);
grzemich 0:d7bd7384a37c 653 if(netif->loop_first != NULL) {
grzemich 0:d7bd7384a37c 654 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
grzemich 0:d7bd7384a37c 655 netif->loop_last->next = r;
grzemich 0:d7bd7384a37c 656 netif->loop_last = last;
grzemich 0:d7bd7384a37c 657 } else {
grzemich 0:d7bd7384a37c 658 netif->loop_first = r;
grzemich 0:d7bd7384a37c 659 netif->loop_last = last;
grzemich 0:d7bd7384a37c 660 }
grzemich 0:d7bd7384a37c 661 SYS_ARCH_UNPROTECT(lev);
grzemich 0:d7bd7384a37c 662
grzemich 0:d7bd7384a37c 663 LINK_STATS_INC(link.xmit);
grzemich 0:d7bd7384a37c 664 snmp_add_ifoutoctets(stats_if, p->tot_len);
grzemich 0:d7bd7384a37c 665 snmp_inc_ifoutucastpkts(stats_if);
grzemich 0:d7bd7384a37c 666
grzemich 0:d7bd7384a37c 667 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
grzemich 0:d7bd7384a37c 668 /* For multithreading environment, schedule a call to netif_poll */
grzemich 0:d7bd7384a37c 669 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
grzemich 0:d7bd7384a37c 670 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
grzemich 0:d7bd7384a37c 671
grzemich 0:d7bd7384a37c 672 return ERR_OK;
grzemich 0:d7bd7384a37c 673 }
grzemich 0:d7bd7384a37c 674
grzemich 0:d7bd7384a37c 675 /**
grzemich 0:d7bd7384a37c 676 * Call netif_poll() in the main loop of your application. This is to prevent
grzemich 0:d7bd7384a37c 677 * reentering non-reentrant functions like tcp_input(). Packets passed to
grzemich 0:d7bd7384a37c 678 * netif_loop_output() are put on a list that is passed to netif->input() by
grzemich 0:d7bd7384a37c 679 * netif_poll().
grzemich 0:d7bd7384a37c 680 */
grzemich 0:d7bd7384a37c 681 void
grzemich 0:d7bd7384a37c 682 netif_poll(struct netif *netif)
grzemich 0:d7bd7384a37c 683 {
grzemich 0:d7bd7384a37c 684 struct pbuf *in;
grzemich 0:d7bd7384a37c 685 /* If we have a loopif, SNMP counters are adjusted for it,
grzemich 0:d7bd7384a37c 686 * if not they are adjusted for 'netif'. */
grzemich 0:d7bd7384a37c 687 #if LWIP_SNMP
grzemich 0:d7bd7384a37c 688 #if LWIP_HAVE_LOOPIF
grzemich 0:d7bd7384a37c 689 struct netif *stats_if = &loop_netif;
grzemich 0:d7bd7384a37c 690 #else /* LWIP_HAVE_LOOPIF */
grzemich 0:d7bd7384a37c 691 struct netif *stats_if = netif;
grzemich 0:d7bd7384a37c 692 #endif /* LWIP_HAVE_LOOPIF */
grzemich 0:d7bd7384a37c 693 #endif /* LWIP_SNMP */
grzemich 0:d7bd7384a37c 694 SYS_ARCH_DECL_PROTECT(lev);
grzemich 0:d7bd7384a37c 695
grzemich 0:d7bd7384a37c 696 do {
grzemich 0:d7bd7384a37c 697 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
grzemich 0:d7bd7384a37c 698 SYS_ARCH_PROTECT(lev);
grzemich 0:d7bd7384a37c 699 in = netif->loop_first;
grzemich 0:d7bd7384a37c 700 if (in != NULL) {
grzemich 0:d7bd7384a37c 701 struct pbuf *in_end = in;
grzemich 0:d7bd7384a37c 702 #if LWIP_LOOPBACK_MAX_PBUFS
grzemich 0:d7bd7384a37c 703 u8_t clen = pbuf_clen(in);
grzemich 0:d7bd7384a37c 704 /* adjust the number of pbufs on queue */
grzemich 0:d7bd7384a37c 705 LWIP_ASSERT("netif->loop_cnt_current underflow",
grzemich 0:d7bd7384a37c 706 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
grzemich 0:d7bd7384a37c 707 netif->loop_cnt_current -= clen;
grzemich 0:d7bd7384a37c 708 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
grzemich 0:d7bd7384a37c 709 while (in_end->len != in_end->tot_len) {
grzemich 0:d7bd7384a37c 710 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
grzemich 0:d7bd7384a37c 711 in_end = in_end->next;
grzemich 0:d7bd7384a37c 712 }
grzemich 0:d7bd7384a37c 713 /* 'in_end' now points to the last pbuf from 'in' */
grzemich 0:d7bd7384a37c 714 if (in_end == netif->loop_last) {
grzemich 0:d7bd7384a37c 715 /* this was the last pbuf in the list */
grzemich 0:d7bd7384a37c 716 netif->loop_first = netif->loop_last = NULL;
grzemich 0:d7bd7384a37c 717 } else {
grzemich 0:d7bd7384a37c 718 /* pop the pbuf off the list */
grzemich 0:d7bd7384a37c 719 netif->loop_first = in_end->next;
grzemich 0:d7bd7384a37c 720 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
grzemich 0:d7bd7384a37c 721 }
grzemich 0:d7bd7384a37c 722 /* De-queue the pbuf from its successors on the 'loop_' list. */
grzemich 0:d7bd7384a37c 723 in_end->next = NULL;
grzemich 0:d7bd7384a37c 724 }
grzemich 0:d7bd7384a37c 725 SYS_ARCH_UNPROTECT(lev);
grzemich 0:d7bd7384a37c 726
grzemich 0:d7bd7384a37c 727 if (in != NULL) {
grzemich 0:d7bd7384a37c 728 LINK_STATS_INC(link.recv);
grzemich 0:d7bd7384a37c 729 snmp_add_ifinoctets(stats_if, in->tot_len);
grzemich 0:d7bd7384a37c 730 snmp_inc_ifinucastpkts(stats_if);
grzemich 0:d7bd7384a37c 731 /* loopback packets are always IP packets! */
grzemich 0:d7bd7384a37c 732 if (ip_input(in, netif) != ERR_OK) {
grzemich 0:d7bd7384a37c 733 pbuf_free(in);
grzemich 0:d7bd7384a37c 734 }
grzemich 0:d7bd7384a37c 735 /* Don't reference the packet any more! */
grzemich 0:d7bd7384a37c 736 in = NULL;
grzemich 0:d7bd7384a37c 737 }
grzemich 0:d7bd7384a37c 738 /* go on while there is a packet on the list */
grzemich 0:d7bd7384a37c 739 } while (netif->loop_first != NULL);
grzemich 0:d7bd7384a37c 740 }
grzemich 0:d7bd7384a37c 741
grzemich 0:d7bd7384a37c 742 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
grzemich 0:d7bd7384a37c 743 /**
grzemich 0:d7bd7384a37c 744 * Calls netif_poll() for every netif on the netif_list.
grzemich 0:d7bd7384a37c 745 */
grzemich 0:d7bd7384a37c 746 void
grzemich 0:d7bd7384a37c 747 netif_poll_all(void)
grzemich 0:d7bd7384a37c 748 {
grzemich 0:d7bd7384a37c 749 struct netif *netif = netif_list;
grzemich 0:d7bd7384a37c 750 /* loop through netifs */
grzemich 0:d7bd7384a37c 751 while (netif != NULL) {
grzemich 0:d7bd7384a37c 752 netif_poll(netif);
grzemich 0:d7bd7384a37c 753 /* proceed to next network interface */
grzemich 0:d7bd7384a37c 754 netif = netif->next;
grzemich 0:d7bd7384a37c 755 }
grzemich 0:d7bd7384a37c 756 }
grzemich 0:d7bd7384a37c 757 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
grzemich 0:d7bd7384a37c 758 #endif /* ENABLE_LOOPBACK */