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Dependencies:   mbed

NetServices/lwip/core/netif.c@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1 /**
Michael J. Spencer 1:f5ac63519541 2 * @file
Michael J. Spencer 1:f5ac63519541 3 * lwIP network interface abstraction
Michael J. Spencer 1:f5ac63519541 4 *
Michael J. Spencer 1:f5ac63519541 5 */
Michael J. Spencer 1:f5ac63519541 6
Michael J. Spencer 1:f5ac63519541 7 /*
Michael J. Spencer 1:f5ac63519541 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
Michael J. Spencer 1:f5ac63519541 9 * All rights reserved.
Michael J. Spencer 1:f5ac63519541 10 *
Michael J. Spencer 1:f5ac63519541 11 * Redistribution and use in source and binary forms, with or without modification,
Michael J. Spencer 1:f5ac63519541 12 * are permitted provided that the following conditions are met:
Michael J. Spencer 1:f5ac63519541 13 *
Michael J. Spencer 1:f5ac63519541 14 * 1. Redistributions of source code must retain the above copyright notice,
Michael J. Spencer 1:f5ac63519541 15 * this list of conditions and the following disclaimer.
Michael J. Spencer 1:f5ac63519541 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
Michael J. Spencer 1:f5ac63519541 17 * this list of conditions and the following disclaimer in the documentation
Michael J. Spencer 1:f5ac63519541 18 * and/or other materials provided with the distribution.
Michael J. Spencer 1:f5ac63519541 19 * 3. The name of the author may not be used to endorse or promote products
Michael J. Spencer 1:f5ac63519541 20 * derived from this software without specific prior written permission.
Michael J. Spencer 1:f5ac63519541 21 *
Michael J. Spencer 1:f5ac63519541 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
Michael J. Spencer 1:f5ac63519541 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
Michael J. Spencer 1:f5ac63519541 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
Michael J. Spencer 1:f5ac63519541 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Michael J. Spencer 1:f5ac63519541 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
Michael J. Spencer 1:f5ac63519541 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Michael J. Spencer 1:f5ac63519541 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Michael J. Spencer 1:f5ac63519541 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
Michael J. Spencer 1:f5ac63519541 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
Michael J. Spencer 1:f5ac63519541 31 * OF SUCH DAMAGE.
Michael J. Spencer 1:f5ac63519541 32 *
Michael J. Spencer 1:f5ac63519541 33 * This file is part of the lwIP TCP/IP stack.
Michael J. Spencer 1:f5ac63519541 34 *
Michael J. Spencer 1:f5ac63519541 35 * Author: Adam Dunkels <adam@sics.se>
Michael J. Spencer 1:f5ac63519541 36 *
Michael J. Spencer 1:f5ac63519541 37 */
Michael J. Spencer 1:f5ac63519541 38
Michael J. Spencer 1:f5ac63519541 39 #include "lwip/opt.h"
Michael J. Spencer 1:f5ac63519541 40
Michael J. Spencer 1:f5ac63519541 41 #include "lwip/def.h"
Michael J. Spencer 1:f5ac63519541 42 #include "lwip/ip_addr.h"
Michael J. Spencer 1:f5ac63519541 43 #include "lwip/netif.h"
Michael J. Spencer 1:f5ac63519541 44 #include "lwip/tcp_impl.h"
Michael J. Spencer 1:f5ac63519541 45 #include "lwip/snmp.h"
Michael J. Spencer 1:f5ac63519541 46 #include "lwip/igmp.h"
Michael J. Spencer 1:f5ac63519541 47 #include "netif/etharp.h"
Michael J. Spencer 1:f5ac63519541 48 #include "lwip/stats.h"
Michael J. Spencer 1:f5ac63519541 49 #if ENABLE_LOOPBACK
Michael J. Spencer 1:f5ac63519541 50 #include "lwip/sys.h"
Michael J. Spencer 1:f5ac63519541 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
Michael J. Spencer 1:f5ac63519541 52 #include "lwip/tcpip.h"
Michael J. Spencer 1:f5ac63519541 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
Michael J. Spencer 1:f5ac63519541 54 #endif /* ENABLE_LOOPBACK */
Michael J. Spencer 1:f5ac63519541 55
Michael J. Spencer 1:f5ac63519541 56 #if LWIP_AUTOIP
Michael J. Spencer 1:f5ac63519541 57 #include "lwip/autoip.h"
Michael J. Spencer 1:f5ac63519541 58 #endif /* LWIP_AUTOIP */
Michael J. Spencer 1:f5ac63519541 59 #if LWIP_DHCP
Michael J. Spencer 1:f5ac63519541 60 #include "lwip/dhcp.h"
Michael J. Spencer 1:f5ac63519541 61 #endif /* LWIP_DHCP */
Michael J. Spencer 1:f5ac63519541 62
Michael J. Spencer 1:f5ac63519541 63 #if LWIP_NETIF_STATUS_CALLBACK
Michael J. Spencer 1:f5ac63519541 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
Michael J. Spencer 1:f5ac63519541 65 #else
Michael J. Spencer 1:f5ac63519541 66 #define NETIF_STATUS_CALLBACK(n)
Michael J. Spencer 1:f5ac63519541 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
Michael J. Spencer 1:f5ac63519541 68
Michael J. Spencer 1:f5ac63519541 69 #if LWIP_NETIF_LINK_CALLBACK
Michael J. Spencer 1:f5ac63519541 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
Michael J. Spencer 1:f5ac63519541 71 #else
Michael J. Spencer 1:f5ac63519541 72 #define NETIF_LINK_CALLBACK(n)
Michael J. Spencer 1:f5ac63519541 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
Michael J. Spencer 1:f5ac63519541 74
Michael J. Spencer 1:f5ac63519541 75 struct netif *netif_list;
Michael J. Spencer 1:f5ac63519541 76 struct netif *netif_default;
Michael J. Spencer 1:f5ac63519541 77
Michael J. Spencer 1:f5ac63519541 78 #if LWIP_HAVE_LOOPIF
Michael J. Spencer 1:f5ac63519541 79 static struct netif loop_netif;
Michael J. Spencer 1:f5ac63519541 80
Michael J. Spencer 1:f5ac63519541 81 /**
Michael J. Spencer 1:f5ac63519541 82 * Initialize a lwip network interface structure for a loopback interface
Michael J. Spencer 1:f5ac63519541 83 *
Michael J. Spencer 1:f5ac63519541 84 * @param netif the lwip network interface structure for this loopif
Michael J. Spencer 1:f5ac63519541 85 * @return ERR_OK if the loopif is initialized
Michael J. Spencer 1:f5ac63519541 86 * ERR_MEM if private data couldn't be allocated
Michael J. Spencer 1:f5ac63519541 87 */
Michael J. Spencer 1:f5ac63519541 88 static err_t
Michael J. Spencer 1:f5ac63519541 89 netif_loopif_init(struct netif *netif)
Michael J. Spencer 1:f5ac63519541 90 {
Michael J. Spencer 1:f5ac63519541 91 /* initialize the snmp variables and counters inside the struct netif
Michael J. Spencer 1:f5ac63519541 92 * ifSpeed: no assumption can be made!
Michael J. Spencer 1:f5ac63519541 93 */
Michael J. Spencer 1:f5ac63519541 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
Michael J. Spencer 1:f5ac63519541 95
Michael J. Spencer 1:f5ac63519541 96 netif->name[0] = 'l';
Michael J. Spencer 1:f5ac63519541 97 netif->name[1] = 'o';
Michael J. Spencer 1:f5ac63519541 98 netif->output = netif_loop_output;
Michael J. Spencer 1:f5ac63519541 99 return ERR_OK;
Michael J. Spencer 1:f5ac63519541 100 }
Michael J. Spencer 1:f5ac63519541 101 #endif /* LWIP_HAVE_LOOPIF */
Michael J. Spencer 1:f5ac63519541 102
Michael J. Spencer 1:f5ac63519541 103 void
Michael J. Spencer 1:f5ac63519541 104 netif_init(void)
Michael J. Spencer 1:f5ac63519541 105 {
Michael J. Spencer 1:f5ac63519541 106 #if LWIP_HAVE_LOOPIF
Michael J. Spencer 1:f5ac63519541 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
Michael J. Spencer 1:f5ac63519541 108 IP4_ADDR(&loop_gw, 127,0,0,1);
Michael J. Spencer 1:f5ac63519541 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
Michael J. Spencer 1:f5ac63519541 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
Michael J. Spencer 1:f5ac63519541 111
Michael J. Spencer 1:f5ac63519541 112 #if NO_SYS
Michael J. Spencer 1:f5ac63519541 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
Michael J. Spencer 1:f5ac63519541 114 #else /* NO_SYS */
Michael J. Spencer 1:f5ac63519541 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
Michael J. Spencer 1:f5ac63519541 116 #endif /* NO_SYS */
Michael J. Spencer 1:f5ac63519541 117 netif_set_up(&loop_netif);
Michael J. Spencer 1:f5ac63519541 118
Michael J. Spencer 1:f5ac63519541 119 #endif /* LWIP_HAVE_LOOPIF */
Michael J. Spencer 1:f5ac63519541 120 }
Michael J. Spencer 1:f5ac63519541 121
Michael J. Spencer 1:f5ac63519541 122 /**
Michael J. Spencer 1:f5ac63519541 123 * Add a network interface to the list of lwIP netifs.
Michael J. Spencer 1:f5ac63519541 124 *
Michael J. Spencer 1:f5ac63519541 125 * @param netif a pre-allocated netif structure
Michael J. Spencer 1:f5ac63519541 126 * @param ipaddr IP address for the new netif
Michael J. Spencer 1:f5ac63519541 127 * @param netmask network mask for the new netif
Michael J. Spencer 1:f5ac63519541 128 * @param gw default gateway IP address for the new netif
Michael J. Spencer 1:f5ac63519541 129 * @param state opaque data passed to the new netif
Michael J. Spencer 1:f5ac63519541 130 * @param init callback function that initializes the interface
Michael J. Spencer 1:f5ac63519541 131 * @param input callback function that is called to pass
Michael J. Spencer 1:f5ac63519541 132 * ingress packets up in the protocol layer stack.
Michael J. Spencer 1:f5ac63519541 133 *
Michael J. Spencer 1:f5ac63519541 134 * @return netif, or NULL if failed.
Michael J. Spencer 1:f5ac63519541 135 */
Michael J. Spencer 1:f5ac63519541 136 struct netif *
Michael J. Spencer 1:f5ac63519541 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
Michael J. Spencer 1:f5ac63519541 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
Michael J. Spencer 1:f5ac63519541 139 {
Michael J. Spencer 1:f5ac63519541 140 static u8_t netifnum = 0;
Michael J. Spencer 1:f5ac63519541 141
Michael J. Spencer 1:f5ac63519541 142 LWIP_ASSERT("No init function given", init != NULL);
Michael J. Spencer 1:f5ac63519541 143
Michael J. Spencer 1:f5ac63519541 144 /* reset new interface configuration state */
Michael J. Spencer 1:f5ac63519541 145 ip_addr_set_zero(&netif->ip_addr);
Michael J. Spencer 1:f5ac63519541 146 ip_addr_set_zero(&netif->netmask);
Michael J. Spencer 1:f5ac63519541 147 ip_addr_set_zero(&netif->gw);
Michael J. Spencer 1:f5ac63519541 148 netif->flags = 0;
Michael J. Spencer 1:f5ac63519541 149 #if LWIP_DHCP
Michael J. Spencer 1:f5ac63519541 150 /* netif not under DHCP control by default */
Michael J. Spencer 1:f5ac63519541 151 netif->dhcp = NULL;
Michael J. Spencer 1:f5ac63519541 152 #endif /* LWIP_DHCP */
Michael J. Spencer 1:f5ac63519541 153 #if LWIP_AUTOIP
Michael J. Spencer 1:f5ac63519541 154 /* netif not under AutoIP control by default */
Michael J. Spencer 1:f5ac63519541 155 netif->autoip = NULL;
Michael J. Spencer 1:f5ac63519541 156 #endif /* LWIP_AUTOIP */
Michael J. Spencer 1:f5ac63519541 157 #if LWIP_NETIF_STATUS_CALLBACK
Michael J. Spencer 1:f5ac63519541 158 netif->status_callback = NULL;
Michael J. Spencer 1:f5ac63519541 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
Michael J. Spencer 1:f5ac63519541 160 #if LWIP_NETIF_LINK_CALLBACK
Michael J. Spencer 1:f5ac63519541 161 netif->link_callback = NULL;
Michael J. Spencer 1:f5ac63519541 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
Michael J. Spencer 1:f5ac63519541 163 #if LWIP_IGMP
Michael J. Spencer 1:f5ac63519541 164 netif->igmp_mac_filter = NULL;
Michael J. Spencer 1:f5ac63519541 165 #endif /* LWIP_IGMP */
Michael J. Spencer 1:f5ac63519541 166 #if ENABLE_LOOPBACK
Michael J. Spencer 1:f5ac63519541 167 netif->loop_first = NULL;
Michael J. Spencer 1:f5ac63519541 168 netif->loop_last = NULL;
Michael J. Spencer 1:f5ac63519541 169 #endif /* ENABLE_LOOPBACK */
Michael J. Spencer 1:f5ac63519541 170
Michael J. Spencer 1:f5ac63519541 171 /* remember netif specific state information data */
Michael J. Spencer 1:f5ac63519541 172 netif->state = state;
Michael J. Spencer 1:f5ac63519541 173 netif->num = netifnum++;
Michael J. Spencer 1:f5ac63519541 174 netif->input = input;
Michael J. Spencer 1:f5ac63519541 175 #if LWIP_NETIF_HWADDRHINT
Michael J. Spencer 1:f5ac63519541 176 netif->addr_hint = NULL;
Michael J. Spencer 1:f5ac63519541 177 #endif /* LWIP_NETIF_HWADDRHINT*/
Michael J. Spencer 1:f5ac63519541 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
Michael J. Spencer 1:f5ac63519541 179 netif->loop_cnt_current = 0;
Michael J. Spencer 1:f5ac63519541 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
Michael J. Spencer 1:f5ac63519541 181
Michael J. Spencer 1:f5ac63519541 182 netif_set_addr(netif, ipaddr, netmask, gw);
Michael J. Spencer 1:f5ac63519541 183
Michael J. Spencer 1:f5ac63519541 184 /* call user specified initialization function for netif */
Michael J. Spencer 1:f5ac63519541 185 if (init(netif) != ERR_OK) {
Michael J. Spencer 1:f5ac63519541 186 return NULL;
Michael J. Spencer 1:f5ac63519541 187 }
Michael J. Spencer 1:f5ac63519541 188
Michael J. Spencer 1:f5ac63519541 189 /* add this netif to the list */
Michael J. Spencer 1:f5ac63519541 190 netif->next = netif_list;
Michael J. Spencer 1:f5ac63519541 191 netif_list = netif;
Michael J. Spencer 1:f5ac63519541 192 snmp_inc_iflist();
Michael J. Spencer 1:f5ac63519541 193
Michael J. Spencer 1:f5ac63519541 194 #if LWIP_IGMP
Michael J. Spencer 1:f5ac63519541 195 /* start IGMP processing */
Michael J. Spencer 1:f5ac63519541 196 if (netif->flags & NETIF_FLAG_IGMP) {
Michael J. Spencer 1:f5ac63519541 197 igmp_start(netif);
Michael J. Spencer 1:f5ac63519541 198 }
Michael J. Spencer 1:f5ac63519541 199 #endif /* LWIP_IGMP */
Michael J. Spencer 1:f5ac63519541 200
Michael J. Spencer 1:f5ac63519541 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
Michael J. Spencer 1:f5ac63519541 202 netif->name[0], netif->name[1]));
Michael J. Spencer 1:f5ac63519541 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
Michael J. Spencer 1:f5ac63519541 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
Michael J. Spencer 1:f5ac63519541 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
Michael J. Spencer 1:f5ac63519541 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
Michael J. Spencer 1:f5ac63519541 207 ip_addr_debug_print(NETIF_DEBUG, gw);
Michael J. Spencer 1:f5ac63519541 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
Michael J. Spencer 1:f5ac63519541 209 return netif;
Michael J. Spencer 1:f5ac63519541 210 }
Michael J. Spencer 1:f5ac63519541 211
Michael J. Spencer 1:f5ac63519541 212 /**
Michael J. Spencer 1:f5ac63519541 213 * Change IP address configuration for a network interface (including netmask
Michael J. Spencer 1:f5ac63519541 214 * and default gateway).
Michael J. Spencer 1:f5ac63519541 215 *
Michael J. Spencer 1:f5ac63519541 216 * @param netif the network interface to change
Michael J. Spencer 1:f5ac63519541 217 * @param ipaddr the new IP address
Michael J. Spencer 1:f5ac63519541 218 * @param netmask the new netmask
Michael J. Spencer 1:f5ac63519541 219 * @param gw the new default gateway
Michael J. Spencer 1:f5ac63519541 220 */
Michael J. Spencer 1:f5ac63519541 221 void
Michael J. Spencer 1:f5ac63519541 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
Michael J. Spencer 1:f5ac63519541 223 ip_addr_t *gw)
Michael J. Spencer 1:f5ac63519541 224 {
Michael J. Spencer 1:f5ac63519541 225 netif_set_ipaddr(netif, ipaddr);
Michael J. Spencer 1:f5ac63519541 226 netif_set_netmask(netif, netmask);
Michael J. Spencer 1:f5ac63519541 227 netif_set_gw(netif, gw);
Michael J. Spencer 1:f5ac63519541 228 }
Michael J. Spencer 1:f5ac63519541 229
Michael J. Spencer 1:f5ac63519541 230 /**
Michael J. Spencer 1:f5ac63519541 231 * Remove a network interface from the list of lwIP netifs.
Michael J. Spencer 1:f5ac63519541 232 *
Michael J. Spencer 1:f5ac63519541 233 * @param netif the network interface to remove
Michael J. Spencer 1:f5ac63519541 234 */
Michael J. Spencer 1:f5ac63519541 235 void
Michael J. Spencer 1:f5ac63519541 236 netif_remove(struct netif *netif)
Michael J. Spencer 1:f5ac63519541 237 {
Michael J. Spencer 1:f5ac63519541 238 if (netif == NULL) {
Michael J. Spencer 1:f5ac63519541 239 return;
Michael J. Spencer 1:f5ac63519541 240 }
Michael J. Spencer 1:f5ac63519541 241
Michael J. Spencer 1:f5ac63519541 242 #if LWIP_IGMP
Michael J. Spencer 1:f5ac63519541 243 /* stop IGMP processing */
Michael J. Spencer 1:f5ac63519541 244 if (netif->flags & NETIF_FLAG_IGMP) {
Michael J. Spencer 1:f5ac63519541 245 igmp_stop(netif);
Michael J. Spencer 1:f5ac63519541 246 }
Michael J. Spencer 1:f5ac63519541 247 #endif /* LWIP_IGMP */
Michael J. Spencer 1:f5ac63519541 248 if (netif_is_up(netif)) {
Michael J. Spencer 1:f5ac63519541 249 /* set netif down before removing (call callback function) */
Michael J. Spencer 1:f5ac63519541 250 netif_set_down(netif);
Michael J. Spencer 1:f5ac63519541 251 }
Michael J. Spencer 1:f5ac63519541 252
Michael J. Spencer 1:f5ac63519541 253 snmp_delete_ipaddridx_tree(netif);
Michael J. Spencer 1:f5ac63519541 254
Michael J. Spencer 1:f5ac63519541 255 /* is it the first netif? */
Michael J. Spencer 1:f5ac63519541 256 if (netif_list == netif) {
Michael J. Spencer 1:f5ac63519541 257 netif_list = netif->next;
Michael J. Spencer 1:f5ac63519541 258 } else {
Michael J. Spencer 1:f5ac63519541 259 /* look for netif further down the list */
Michael J. Spencer 1:f5ac63519541 260 struct netif * tmpNetif;
Michael J. Spencer 1:f5ac63519541 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
Michael J. Spencer 1:f5ac63519541 262 if (tmpNetif->next == netif) {
Michael J. Spencer 1:f5ac63519541 263 tmpNetif->next = netif->next;
Michael J. Spencer 1:f5ac63519541 264 break;
Michael J. Spencer 1:f5ac63519541 265 }
Michael J. Spencer 1:f5ac63519541 266 }
Michael J. Spencer 1:f5ac63519541 267 if (tmpNetif == NULL)
Michael J. Spencer 1:f5ac63519541 268 return; /* we didn't find any netif today */
Michael J. Spencer 1:f5ac63519541 269 }
Michael J. Spencer 1:f5ac63519541 270 snmp_dec_iflist();
Michael J. Spencer 1:f5ac63519541 271 /* this netif is default? */
Michael J. Spencer 1:f5ac63519541 272 if (netif_default == netif) {
Michael J. Spencer 1:f5ac63519541 273 /* reset default netif */
Michael J. Spencer 1:f5ac63519541 274 netif_set_default(NULL);
Michael J. Spencer 1:f5ac63519541 275 }
Michael J. Spencer 1:f5ac63519541 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
Michael J. Spencer 1:f5ac63519541 277 }
Michael J. Spencer 1:f5ac63519541 278
Michael J. Spencer 1:f5ac63519541 279 /**
Michael J. Spencer 1:f5ac63519541 280 * Find a network interface by searching for its name
Michael J. Spencer 1:f5ac63519541 281 *
Michael J. Spencer 1:f5ac63519541 282 * @param name the name of the netif (like netif->name) plus concatenated number
Michael J. Spencer 1:f5ac63519541 283 * in ascii representation (e.g. 'en0')
Michael J. Spencer 1:f5ac63519541 284 */
Michael J. Spencer 1:f5ac63519541 285 struct netif *
Michael J. Spencer 1:f5ac63519541 286 netif_find(char *name)
Michael J. Spencer 1:f5ac63519541 287 {
Michael J. Spencer 1:f5ac63519541 288 struct netif *netif;
Michael J. Spencer 1:f5ac63519541 289 u8_t num;
Michael J. Spencer 1:f5ac63519541 290
Michael J. Spencer 1:f5ac63519541 291 if (name == NULL) {
Michael J. Spencer 1:f5ac63519541 292 return NULL;
Michael J. Spencer 1:f5ac63519541 293 }
Michael J. Spencer 1:f5ac63519541 294
Michael J. Spencer 1:f5ac63519541 295 num = name[2] - '0';
Michael J. Spencer 1:f5ac63519541 296
Michael J. Spencer 1:f5ac63519541 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
Michael J. Spencer 1:f5ac63519541 298 if (num == netif->num &&
Michael J. Spencer 1:f5ac63519541 299 name[0] == netif->name[0] &&
Michael J. Spencer 1:f5ac63519541 300 name[1] == netif->name[1]) {
Michael J. Spencer 1:f5ac63519541 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
Michael J. Spencer 1:f5ac63519541 302 return netif;
Michael J. Spencer 1:f5ac63519541 303 }
Michael J. Spencer 1:f5ac63519541 304 }
Michael J. Spencer 1:f5ac63519541 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
Michael J. Spencer 1:f5ac63519541 306 return NULL;
Michael J. Spencer 1:f5ac63519541 307 }
Michael J. Spencer 1:f5ac63519541 308
Michael J. Spencer 1:f5ac63519541 309 /**
Michael J. Spencer 1:f5ac63519541 310 * Change the IP address of a network interface
Michael J. Spencer 1:f5ac63519541 311 *
Michael J. Spencer 1:f5ac63519541 312 * @param netif the network interface to change
Michael J. Spencer 1:f5ac63519541 313 * @param ipaddr the new IP address
Michael J. Spencer 1:f5ac63519541 314 *
Michael J. Spencer 1:f5ac63519541 315 * @note call netif_set_addr() if you also want to change netmask and
Michael J. Spencer 1:f5ac63519541 316 * default gateway
Michael J. Spencer 1:f5ac63519541 317 */
Michael J. Spencer 1:f5ac63519541 318 void
Michael J. Spencer 1:f5ac63519541 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
Michael J. Spencer 1:f5ac63519541 320 {
Michael J. Spencer 1:f5ac63519541 321 /* TODO: Handling of obsolete pcbs */
Michael J. Spencer 1:f5ac63519541 322 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
Michael J. Spencer 1:f5ac63519541 323 #if LWIP_TCP
Michael J. Spencer 1:f5ac63519541 324 struct tcp_pcb *pcb;
Michael J. Spencer 1:f5ac63519541 325 struct tcp_pcb_listen *lpcb;
Michael J. Spencer 1:f5ac63519541 326
Michael J. Spencer 1:f5ac63519541 327 /* address is actually being changed? */
Michael J. Spencer 1:f5ac63519541 328 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
Michael J. Spencer 1:f5ac63519541 329 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
Michael J. Spencer 1:f5ac63519541 330 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
Michael J. Spencer 1:f5ac63519541 331 pcb = tcp_active_pcbs;
Michael J. Spencer 1:f5ac63519541 332 while (pcb != NULL) {
Michael J. Spencer 1:f5ac63519541 333 /* PCB bound to current local interface address? */
Michael J. Spencer 1:f5ac63519541 334 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
Michael J. Spencer 1:f5ac63519541 335 #if LWIP_AUTOIP
Michael J. Spencer 1:f5ac63519541 336 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
Michael J. Spencer 1:f5ac63519541 337 && !ip_addr_islinklocal(&(pcb->local_ip))
Michael J. Spencer 1:f5ac63519541 338 #endif /* LWIP_AUTOIP */
Michael J. Spencer 1:f5ac63519541 339 ) {
Michael J. Spencer 1:f5ac63519541 340 /* this connection must be aborted */
Michael J. Spencer 1:f5ac63519541 341 struct tcp_pcb *next = pcb->next;
Michael J. Spencer 1:f5ac63519541 342 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
Michael J. Spencer 1:f5ac63519541 343 tcp_abort(pcb);
Michael J. Spencer 1:f5ac63519541 344 pcb = next;
Michael J. Spencer 1:f5ac63519541 345 } else {
Michael J. Spencer 1:f5ac63519541 346 pcb = pcb->next;
Michael J. Spencer 1:f5ac63519541 347 }
Michael J. Spencer 1:f5ac63519541 348 }
Michael J. Spencer 1:f5ac63519541 349 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
Michael J. Spencer 1:f5ac63519541 350 /* PCB bound to current local interface address? */
Michael J. Spencer 1:f5ac63519541 351 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
Michael J. Spencer 1:f5ac63519541 352 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
Michael J. Spencer 1:f5ac63519541 353 /* The PCB is listening to the old ipaddr and
Michael J. Spencer 1:f5ac63519541 354 * is set to listen to the new one instead */
Michael J. Spencer 1:f5ac63519541 355 ip_addr_set(&(lpcb->local_ip), ipaddr);
Michael J. Spencer 1:f5ac63519541 356 }
Michael J. Spencer 1:f5ac63519541 357 }
Michael J. Spencer 1:f5ac63519541 358 }
Michael J. Spencer 1:f5ac63519541 359 #endif
Michael J. Spencer 1:f5ac63519541 360 snmp_delete_ipaddridx_tree(netif);
Michael J. Spencer 1:f5ac63519541 361 snmp_delete_iprteidx_tree(0,netif);
Michael J. Spencer 1:f5ac63519541 362 /* set new IP address to netif */
Michael J. Spencer 1:f5ac63519541 363 ip_addr_set(&(netif->ip_addr), ipaddr);
Michael J. Spencer 1:f5ac63519541 364 snmp_insert_ipaddridx_tree(netif);
Michael J. Spencer 1:f5ac63519541 365 snmp_insert_iprteidx_tree(0,netif);
Michael J. Spencer 1:f5ac63519541 366
Michael J. Spencer 1:f5ac63519541 367 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",
Michael J. Spencer 1:f5ac63519541 368 netif->name[0], netif->name[1],
Michael J. Spencer 1:f5ac63519541 369 ip4_addr1_16(&netif->ip_addr),
Michael J. Spencer 1:f5ac63519541 370 ip4_addr2_16(&netif->ip_addr),
Michael J. Spencer 1:f5ac63519541 371 ip4_addr3_16(&netif->ip_addr),
Michael J. Spencer 1:f5ac63519541 372 ip4_addr4_16(&netif->ip_addr)));
Michael J. Spencer 1:f5ac63519541 373 }
Michael J. Spencer 1:f5ac63519541 374
Michael J. Spencer 1:f5ac63519541 375 /**
Michael J. Spencer 1:f5ac63519541 376 * Change the default gateway for a network interface
Michael J. Spencer 1:f5ac63519541 377 *
Michael J. Spencer 1:f5ac63519541 378 * @param netif the network interface to change
Michael J. Spencer 1:f5ac63519541 379 * @param gw the new default gateway
Michael J. Spencer 1:f5ac63519541 380 *
Michael J. Spencer 1:f5ac63519541 381 * @note call netif_set_addr() if you also want to change ip address and netmask
Michael J. Spencer 1:f5ac63519541 382 */
Michael J. Spencer 1:f5ac63519541 383 void
Michael J. Spencer 1:f5ac63519541 384 netif_set_gw(struct netif *netif, ip_addr_t *gw)
Michael J. Spencer 1:f5ac63519541 385 {
Michael J. Spencer 1:f5ac63519541 386 ip_addr_set(&(netif->gw), gw);
Michael J. Spencer 1:f5ac63519541 387 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",
Michael J. Spencer 1:f5ac63519541 388 netif->name[0], netif->name[1],
Michael J. Spencer 1:f5ac63519541 389 ip4_addr1_16(&netif->gw),
Michael J. Spencer 1:f5ac63519541 390 ip4_addr2_16(&netif->gw),
Michael J. Spencer 1:f5ac63519541 391 ip4_addr3_16(&netif->gw),
Michael J. Spencer 1:f5ac63519541 392 ip4_addr4_16(&netif->gw)));
Michael J. Spencer 1:f5ac63519541 393 }
Michael J. Spencer 1:f5ac63519541 394
Michael J. Spencer 1:f5ac63519541 395 /**
Michael J. Spencer 1:f5ac63519541 396 * Change the netmask of a network interface
Michael J. Spencer 1:f5ac63519541 397 *
Michael J. Spencer 1:f5ac63519541 398 * @param netif the network interface to change
Michael J. Spencer 1:f5ac63519541 399 * @param netmask the new netmask
Michael J. Spencer 1:f5ac63519541 400 *
Michael J. Spencer 1:f5ac63519541 401 * @note call netif_set_addr() if you also want to change ip address and
Michael J. Spencer 1:f5ac63519541 402 * default gateway
Michael J. Spencer 1:f5ac63519541 403 */
Michael J. Spencer 1:f5ac63519541 404 void
Michael J. Spencer 1:f5ac63519541 405 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
Michael J. Spencer 1:f5ac63519541 406 {
Michael J. Spencer 1:f5ac63519541 407 snmp_delete_iprteidx_tree(0, netif);
Michael J. Spencer 1:f5ac63519541 408 /* set new netmask to netif */
Michael J. Spencer 1:f5ac63519541 409 ip_addr_set(&(netif->netmask), netmask);
Michael J. Spencer 1:f5ac63519541 410 snmp_insert_iprteidx_tree(0, netif);
Michael J. Spencer 1:f5ac63519541 411 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",
Michael J. Spencer 1:f5ac63519541 412 netif->name[0], netif->name[1],
Michael J. Spencer 1:f5ac63519541 413 ip4_addr1_16(&netif->netmask),
Michael J. Spencer 1:f5ac63519541 414 ip4_addr2_16(&netif->netmask),
Michael J. Spencer 1:f5ac63519541 415 ip4_addr3_16(&netif->netmask),
Michael J. Spencer 1:f5ac63519541 416 ip4_addr4_16(&netif->netmask)));
Michael J. Spencer 1:f5ac63519541 417 }
Michael J. Spencer 1:f5ac63519541 418
Michael J. Spencer 1:f5ac63519541 419 /**
Michael J. Spencer 1:f5ac63519541 420 * Set a network interface as the default network interface
Michael J. Spencer 1:f5ac63519541 421 * (used to output all packets for which no specific route is found)
Michael J. Spencer 1:f5ac63519541 422 *
Michael J. Spencer 1:f5ac63519541 423 * @param netif the default network interface
Michael J. Spencer 1:f5ac63519541 424 */
Michael J. Spencer 1:f5ac63519541 425 void
Michael J. Spencer 1:f5ac63519541 426 netif_set_default(struct netif *netif)
Michael J. Spencer 1:f5ac63519541 427 {
Michael J. Spencer 1:f5ac63519541 428 if (netif == NULL) {
Michael J. Spencer 1:f5ac63519541 429 /* remove default route */
Michael J. Spencer 1:f5ac63519541 430 snmp_delete_iprteidx_tree(1, netif);
Michael J. Spencer 1:f5ac63519541 431 } else {
Michael J. Spencer 1:f5ac63519541 432 /* install default route */
Michael J. Spencer 1:f5ac63519541 433 snmp_insert_iprteidx_tree(1, netif);
Michael J. Spencer 1:f5ac63519541 434 }
Michael J. Spencer 1:f5ac63519541 435 netif_default = netif;
Michael J. Spencer 1:f5ac63519541 436 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
Michael J. Spencer 1:f5ac63519541 437 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
Michael J. Spencer 1:f5ac63519541 438 }
Michael J. Spencer 1:f5ac63519541 439
Michael J. Spencer 1:f5ac63519541 440 /**
Michael J. Spencer 1:f5ac63519541 441 * Bring an interface up, available for processing
Michael J. Spencer 1:f5ac63519541 442 * traffic.
Michael J. Spencer 1:f5ac63519541 443 *
Michael J. Spencer 1:f5ac63519541 444 * @note: Enabling DHCP on a down interface will make it come
Michael J. Spencer 1:f5ac63519541 445 * up once configured.
Michael J. Spencer 1:f5ac63519541 446 *
Michael J. Spencer 1:f5ac63519541 447 * @see dhcp_start()
Michael J. Spencer 1:f5ac63519541 448 */
Michael J. Spencer 1:f5ac63519541 449 void netif_set_up(struct netif *netif)
Michael J. Spencer 1:f5ac63519541 450 {
Michael J. Spencer 1:f5ac63519541 451 if (!(netif->flags & NETIF_FLAG_UP)) {
Michael J. Spencer 1:f5ac63519541 452 netif->flags |= NETIF_FLAG_UP;
Michael J. Spencer 1:f5ac63519541 453
Michael J. Spencer 1:f5ac63519541 454 #if LWIP_SNMP
Michael J. Spencer 1:f5ac63519541 455 snmp_get_sysuptime(&netif->ts);
Michael J. Spencer 1:f5ac63519541 456 #endif /* LWIP_SNMP */
Michael J. Spencer 1:f5ac63519541 457
Michael J. Spencer 1:f5ac63519541 458 NETIF_STATUS_CALLBACK(netif);
Michael J. Spencer 1:f5ac63519541 459
Michael J. Spencer 1:f5ac63519541 460 if (netif->flags & NETIF_FLAG_LINK_UP) {
Michael J. Spencer 1:f5ac63519541 461 #if LWIP_ARP
Michael J. Spencer 1:f5ac63519541 462 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
Michael J. Spencer 1:f5ac63519541 463 if (netif->flags & (NETIF_FLAG_ETHARP)) {
Michael J. Spencer 1:f5ac63519541 464 etharp_gratuitous(netif);
Michael J. Spencer 1:f5ac63519541 465 }
Michael J. Spencer 1:f5ac63519541 466 #endif /* LWIP_ARP */
Michael J. Spencer 1:f5ac63519541 467
Michael J. Spencer 1:f5ac63519541 468 #if LWIP_IGMP
Michael J. Spencer 1:f5ac63519541 469 /* resend IGMP memberships */
Michael J. Spencer 1:f5ac63519541 470 if (netif->flags & NETIF_FLAG_IGMP) {
Michael J. Spencer 1:f5ac63519541 471 igmp_report_groups( netif);
Michael J. Spencer 1:f5ac63519541 472 }
Michael J. Spencer 1:f5ac63519541 473 #endif /* LWIP_IGMP */
Michael J. Spencer 1:f5ac63519541 474 }
Michael J. Spencer 1:f5ac63519541 475 }
Michael J. Spencer 1:f5ac63519541 476 }
Michael J. Spencer 1:f5ac63519541 477
Michael J. Spencer 1:f5ac63519541 478 /**
Michael J. Spencer 1:f5ac63519541 479 * Bring an interface down, disabling any traffic processing.
Michael J. Spencer 1:f5ac63519541 480 *
Michael J. Spencer 1:f5ac63519541 481 * @note: Enabling DHCP on a down interface will make it come
Michael J. Spencer 1:f5ac63519541 482 * up once configured.
Michael J. Spencer 1:f5ac63519541 483 *
Michael J. Spencer 1:f5ac63519541 484 * @see dhcp_start()
Michael J. Spencer 1:f5ac63519541 485 */
Michael J. Spencer 1:f5ac63519541 486 void netif_set_down(struct netif *netif)
Michael J. Spencer 1:f5ac63519541 487 {
Michael J. Spencer 1:f5ac63519541 488 if (netif->flags & NETIF_FLAG_UP) {
Michael J. Spencer 1:f5ac63519541 489 netif->flags &= ~NETIF_FLAG_UP;
Michael J. Spencer 1:f5ac63519541 490 #if LWIP_SNMP
Michael J. Spencer 1:f5ac63519541 491 snmp_get_sysuptime(&netif->ts);
Michael J. Spencer 1:f5ac63519541 492 #endif
Michael J. Spencer 1:f5ac63519541 493
Michael J. Spencer 1:f5ac63519541 494 NETIF_STATUS_CALLBACK(netif);
Michael J. Spencer 1:f5ac63519541 495 }
Michael J. Spencer 1:f5ac63519541 496 }
Michael J. Spencer 1:f5ac63519541 497
Michael J. Spencer 1:f5ac63519541 498 #if LWIP_NETIF_STATUS_CALLBACK
Michael J. Spencer 1:f5ac63519541 499 /**
Michael J. Spencer 1:f5ac63519541 500 * Set callback to be called when interface is brought up/down
Michael J. Spencer 1:f5ac63519541 501 */
Michael J. Spencer 1:f5ac63519541 502 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
Michael J. Spencer 1:f5ac63519541 503 {
Michael J. Spencer 1:f5ac63519541 504 if (netif) {
Michael J. Spencer 1:f5ac63519541 505 netif->status_callback = status_callback;
Michael J. Spencer 1:f5ac63519541 506 }
Michael J. Spencer 1:f5ac63519541 507 }
Michael J. Spencer 1:f5ac63519541 508 #endif /* LWIP_NETIF_STATUS_CALLBACK */
Michael J. Spencer 1:f5ac63519541 509
Michael J. Spencer 1:f5ac63519541 510 /**
Michael J. Spencer 1:f5ac63519541 511 * Called by a driver when its link goes up
Michael J. Spencer 1:f5ac63519541 512 */
Michael J. Spencer 1:f5ac63519541 513 void netif_set_link_up(struct netif *netif )
Michael J. Spencer 1:f5ac63519541 514 {
Michael J. Spencer 1:f5ac63519541 515 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
Michael J. Spencer 1:f5ac63519541 516 netif->flags |= NETIF_FLAG_LINK_UP;
Michael J. Spencer 1:f5ac63519541 517
Michael J. Spencer 1:f5ac63519541 518 #if LWIP_DHCP
Michael J. Spencer 1:f5ac63519541 519 if (netif->dhcp) {
Michael J. Spencer 1:f5ac63519541 520 dhcp_network_changed(netif);
Michael J. Spencer 1:f5ac63519541 521 }
Michael J. Spencer 1:f5ac63519541 522 #endif /* LWIP_DHCP */
Michael J. Spencer 1:f5ac63519541 523
Michael J. Spencer 1:f5ac63519541 524 #if LWIP_AUTOIP
Michael J. Spencer 1:f5ac63519541 525 if (netif->autoip) {
Michael J. Spencer 1:f5ac63519541 526 autoip_network_changed(netif);
Michael J. Spencer 1:f5ac63519541 527 }
Michael J. Spencer 1:f5ac63519541 528 #endif /* LWIP_AUTOIP */
Michael J. Spencer 1:f5ac63519541 529
Michael J. Spencer 1:f5ac63519541 530 if (netif->flags & NETIF_FLAG_UP) {
Michael J. Spencer 1:f5ac63519541 531 #if LWIP_ARP
Michael J. Spencer 1:f5ac63519541 532 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
Michael J. Spencer 1:f5ac63519541 533 if (netif->flags & NETIF_FLAG_ETHARP) {
Michael J. Spencer 1:f5ac63519541 534 etharp_gratuitous(netif);
Michael J. Spencer 1:f5ac63519541 535 }
Michael J. Spencer 1:f5ac63519541 536 #endif /* LWIP_ARP */
Michael J. Spencer 1:f5ac63519541 537
Michael J. Spencer 1:f5ac63519541 538 #if LWIP_IGMP
Michael J. Spencer 1:f5ac63519541 539 /* resend IGMP memberships */
Michael J. Spencer 1:f5ac63519541 540 if (netif->flags & NETIF_FLAG_IGMP) {
Michael J. Spencer 1:f5ac63519541 541 igmp_report_groups( netif);
Michael J. Spencer 1:f5ac63519541 542 }
Michael J. Spencer 1:f5ac63519541 543 #endif /* LWIP_IGMP */
Michael J. Spencer 1:f5ac63519541 544 }
Michael J. Spencer 1:f5ac63519541 545 NETIF_LINK_CALLBACK(netif);
Michael J. Spencer 1:f5ac63519541 546 }
Michael J. Spencer 1:f5ac63519541 547 }
Michael J. Spencer 1:f5ac63519541 548
Michael J. Spencer 1:f5ac63519541 549 /**
Michael J. Spencer 1:f5ac63519541 550 * Called by a driver when its link goes down
Michael J. Spencer 1:f5ac63519541 551 */
Michael J. Spencer 1:f5ac63519541 552 void netif_set_link_down(struct netif *netif )
Michael J. Spencer 1:f5ac63519541 553 {
Michael J. Spencer 1:f5ac63519541 554 if (netif->flags & NETIF_FLAG_LINK_UP) {
Michael J. Spencer 1:f5ac63519541 555 netif->flags &= ~NETIF_FLAG_LINK_UP;
Michael J. Spencer 1:f5ac63519541 556 NETIF_LINK_CALLBACK(netif);
Michael J. Spencer 1:f5ac63519541 557 }
Michael J. Spencer 1:f5ac63519541 558 }
Michael J. Spencer 1:f5ac63519541 559
Michael J. Spencer 1:f5ac63519541 560 #if LWIP_NETIF_LINK_CALLBACK
Michael J. Spencer 1:f5ac63519541 561 /**
Michael J. Spencer 1:f5ac63519541 562 * Set callback to be called when link is brought up/down
Michael J. Spencer 1:f5ac63519541 563 */
Michael J. Spencer 1:f5ac63519541 564 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
Michael J. Spencer 1:f5ac63519541 565 {
Michael J. Spencer 1:f5ac63519541 566 if (netif) {
Michael J. Spencer 1:f5ac63519541 567 netif->link_callback = link_callback;
Michael J. Spencer 1:f5ac63519541 568 }
Michael J. Spencer 1:f5ac63519541 569 }
Michael J. Spencer 1:f5ac63519541 570 #endif /* LWIP_NETIF_LINK_CALLBACK */
Michael J. Spencer 1:f5ac63519541 571
Michael J. Spencer 1:f5ac63519541 572 #if ENABLE_LOOPBACK
Michael J. Spencer 1:f5ac63519541 573 /**
Michael J. Spencer 1:f5ac63519541 574 * Send an IP packet to be received on the same netif (loopif-like).
Michael J. Spencer 1:f5ac63519541 575 * The pbuf is simply copied and handed back to netif->input.
Michael J. Spencer 1:f5ac63519541 576 * In multithreaded mode, this is done directly since netif->input must put
Michael J. Spencer 1:f5ac63519541 577 * the packet on a queue.
Michael J. Spencer 1:f5ac63519541 578 * In callback mode, the packet is put on an internal queue and is fed to
Michael J. Spencer 1:f5ac63519541 579 * netif->input by netif_poll().
Michael J. Spencer 1:f5ac63519541 580 *
Michael J. Spencer 1:f5ac63519541 581 * @param netif the lwip network interface structure
Michael J. Spencer 1:f5ac63519541 582 * @param p the (IP) packet to 'send'
Michael J. Spencer 1:f5ac63519541 583 * @param ipaddr the ip address to send the packet to (not used)
Michael J. Spencer 1:f5ac63519541 584 * @return ERR_OK if the packet has been sent
Michael J. Spencer 1:f5ac63519541 585 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
Michael J. Spencer 1:f5ac63519541 586 */
Michael J. Spencer 1:f5ac63519541 587 err_t
Michael J. Spencer 1:f5ac63519541 588 netif_loop_output(struct netif *netif, struct pbuf *p,
Michael J. Spencer 1:f5ac63519541 589 ip_addr_t *ipaddr)
Michael J. Spencer 1:f5ac63519541 590 {
Michael J. Spencer 1:f5ac63519541 591 struct pbuf *r;
Michael J. Spencer 1:f5ac63519541 592 err_t err;
Michael J. Spencer 1:f5ac63519541 593 struct pbuf *last;
Michael J. Spencer 1:f5ac63519541 594 #if LWIP_LOOPBACK_MAX_PBUFS
Michael J. Spencer 1:f5ac63519541 595 u8_t clen = 0;
Michael J. Spencer 1:f5ac63519541 596 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
Michael J. Spencer 1:f5ac63519541 597 /* If we have a loopif, SNMP counters are adjusted for it,
Michael J. Spencer 1:f5ac63519541 598 * if not they are adjusted for 'netif'. */
Michael J. Spencer 1:f5ac63519541 599 #if LWIP_SNMP
Michael J. Spencer 1:f5ac63519541 600 #if LWIP_HAVE_LOOPIF
Michael J. Spencer 1:f5ac63519541 601 struct netif *stats_if = &loop_netif;
Michael J. Spencer 1:f5ac63519541 602 #else /* LWIP_HAVE_LOOPIF */
Michael J. Spencer 1:f5ac63519541 603 struct netif *stats_if = netif;
Michael J. Spencer 1:f5ac63519541 604 #endif /* LWIP_HAVE_LOOPIF */
Michael J. Spencer 1:f5ac63519541 605 #endif /* LWIP_SNMP */
Michael J. Spencer 1:f5ac63519541 606 SYS_ARCH_DECL_PROTECT(lev);
Michael J. Spencer 1:f5ac63519541 607 LWIP_UNUSED_ARG(ipaddr);
Michael J. Spencer 1:f5ac63519541 608
Michael J. Spencer 1:f5ac63519541 609 /* Allocate a new pbuf */
Michael J. Spencer 1:f5ac63519541 610 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
Michael J. Spencer 1:f5ac63519541 611 if (r == NULL) {
Michael J. Spencer 1:f5ac63519541 612 LINK_STATS_INC(link.memerr);
Michael J. Spencer 1:f5ac63519541 613 LINK_STATS_INC(link.drop);
Michael J. Spencer 1:f5ac63519541 614 snmp_inc_ifoutdiscards(stats_if);
Michael J. Spencer 1:f5ac63519541 615 return ERR_MEM;
Michael J. Spencer 1:f5ac63519541 616 }
Michael J. Spencer 1:f5ac63519541 617 #if LWIP_LOOPBACK_MAX_PBUFS
Michael J. Spencer 1:f5ac63519541 618 clen = pbuf_clen(r);
Michael J. Spencer 1:f5ac63519541 619 /* check for overflow or too many pbuf on queue */
Michael J. Spencer 1:f5ac63519541 620 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
Michael J. Spencer 1:f5ac63519541 621 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
Michael J. Spencer 1:f5ac63519541 622 pbuf_free(r);
Michael J. Spencer 1:f5ac63519541 623 LINK_STATS_INC(link.memerr);
Michael J. Spencer 1:f5ac63519541 624 LINK_STATS_INC(link.drop);
Michael J. Spencer 1:f5ac63519541 625 snmp_inc_ifoutdiscards(stats_if);
Michael J. Spencer 1:f5ac63519541 626 return ERR_MEM;
Michael J. Spencer 1:f5ac63519541 627 }
Michael J. Spencer 1:f5ac63519541 628 netif->loop_cnt_current += clen;
Michael J. Spencer 1:f5ac63519541 629 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
Michael J. Spencer 1:f5ac63519541 630
Michael J. Spencer 1:f5ac63519541 631 /* Copy the whole pbuf queue p into the single pbuf r */
Michael J. Spencer 1:f5ac63519541 632 if ((err = pbuf_copy(r, p)) != ERR_OK) {
Michael J. Spencer 1:f5ac63519541 633 pbuf_free(r);
Michael J. Spencer 1:f5ac63519541 634 LINK_STATS_INC(link.memerr);
Michael J. Spencer 1:f5ac63519541 635 LINK_STATS_INC(link.drop);
Michael J. Spencer 1:f5ac63519541 636 snmp_inc_ifoutdiscards(stats_if);
Michael J. Spencer 1:f5ac63519541 637 return err;
Michael J. Spencer 1:f5ac63519541 638 }
Michael J. Spencer 1:f5ac63519541 639
Michael J. Spencer 1:f5ac63519541 640 /* Put the packet on a linked list which gets emptied through calling
Michael J. Spencer 1:f5ac63519541 641 netif_poll(). */
Michael J. Spencer 1:f5ac63519541 642
Michael J. Spencer 1:f5ac63519541 643 /* let last point to the last pbuf in chain r */
Michael J. Spencer 1:f5ac63519541 644 for (last = r; last->next != NULL; last = last->next);
Michael J. Spencer 1:f5ac63519541 645
Michael J. Spencer 1:f5ac63519541 646 SYS_ARCH_PROTECT(lev);
Michael J. Spencer 1:f5ac63519541 647 if(netif->loop_first != NULL) {
Michael J. Spencer 1:f5ac63519541 648 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
Michael J. Spencer 1:f5ac63519541 649 netif->loop_last->next = r;
Michael J. Spencer 1:f5ac63519541 650 netif->loop_last = last;
Michael J. Spencer 1:f5ac63519541 651 } else {
Michael J. Spencer 1:f5ac63519541 652 netif->loop_first = r;
Michael J. Spencer 1:f5ac63519541 653 netif->loop_last = last;
Michael J. Spencer 1:f5ac63519541 654 }
Michael J. Spencer 1:f5ac63519541 655 SYS_ARCH_UNPROTECT(lev);
Michael J. Spencer 1:f5ac63519541 656
Michael J. Spencer 1:f5ac63519541 657 LINK_STATS_INC(link.xmit);
Michael J. Spencer 1:f5ac63519541 658 snmp_add_ifoutoctets(stats_if, p->tot_len);
Michael J. Spencer 1:f5ac63519541 659 snmp_inc_ifoutucastpkts(stats_if);
Michael J. Spencer 1:f5ac63519541 660
Michael J. Spencer 1:f5ac63519541 661 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
Michael J. Spencer 1:f5ac63519541 662 /* For multithreading environment, schedule a call to netif_poll */
Michael J. Spencer 1:f5ac63519541 663 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
Michael J. Spencer 1:f5ac63519541 664 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
Michael J. Spencer 1:f5ac63519541 665
Michael J. Spencer 1:f5ac63519541 666 return ERR_OK;
Michael J. Spencer 1:f5ac63519541 667 }
Michael J. Spencer 1:f5ac63519541 668
Michael J. Spencer 1:f5ac63519541 669 /**
Michael J. Spencer 1:f5ac63519541 670 * Call netif_poll() in the main loop of your application. This is to prevent
Michael J. Spencer 1:f5ac63519541 671 * reentering non-reentrant functions like tcp_input(). Packets passed to
Michael J. Spencer 1:f5ac63519541 672 * netif_loop_output() are put on a list that is passed to netif->input() by
Michael J. Spencer 1:f5ac63519541 673 * netif_poll().
Michael J. Spencer 1:f5ac63519541 674 */
Michael J. Spencer 1:f5ac63519541 675 void
Michael J. Spencer 1:f5ac63519541 676 netif_poll(struct netif *netif)
Michael J. Spencer 1:f5ac63519541 677 {
Michael J. Spencer 1:f5ac63519541 678 struct pbuf *in;
Michael J. Spencer 1:f5ac63519541 679 /* If we have a loopif, SNMP counters are adjusted for it,
Michael J. Spencer 1:f5ac63519541 680 * if not they are adjusted for 'netif'. */
Michael J. Spencer 1:f5ac63519541 681 #if LWIP_SNMP
Michael J. Spencer 1:f5ac63519541 682 #if LWIP_HAVE_LOOPIF
Michael J. Spencer 1:f5ac63519541 683 struct netif *stats_if = &loop_netif;
Michael J. Spencer 1:f5ac63519541 684 #else /* LWIP_HAVE_LOOPIF */
Michael J. Spencer 1:f5ac63519541 685 struct netif *stats_if = netif;
Michael J. Spencer 1:f5ac63519541 686 #endif /* LWIP_HAVE_LOOPIF */
Michael J. Spencer 1:f5ac63519541 687 #endif /* LWIP_SNMP */
Michael J. Spencer 1:f5ac63519541 688 SYS_ARCH_DECL_PROTECT(lev);
Michael J. Spencer 1:f5ac63519541 689
Michael J. Spencer 1:f5ac63519541 690 do {
Michael J. Spencer 1:f5ac63519541 691 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
Michael J. Spencer 1:f5ac63519541 692 SYS_ARCH_PROTECT(lev);
Michael J. Spencer 1:f5ac63519541 693 in = netif->loop_first;
Michael J. Spencer 1:f5ac63519541 694 if (in != NULL) {
Michael J. Spencer 1:f5ac63519541 695 struct pbuf *in_end = in;
Michael J. Spencer 1:f5ac63519541 696 #if LWIP_LOOPBACK_MAX_PBUFS
Michael J. Spencer 1:f5ac63519541 697 u8_t clen = pbuf_clen(in);
Michael J. Spencer 1:f5ac63519541 698 /* adjust the number of pbufs on queue */
Michael J. Spencer 1:f5ac63519541 699 LWIP_ASSERT("netif->loop_cnt_current underflow",
Michael J. Spencer 1:f5ac63519541 700 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
Michael J. Spencer 1:f5ac63519541 701 netif->loop_cnt_current -= clen;
Michael J. Spencer 1:f5ac63519541 702 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
Michael J. Spencer 1:f5ac63519541 703 while (in_end->len != in_end->tot_len) {
Michael J. Spencer 1:f5ac63519541 704 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
Michael J. Spencer 1:f5ac63519541 705 in_end = in_end->next;
Michael J. Spencer 1:f5ac63519541 706 }
Michael J. Spencer 1:f5ac63519541 707 /* 'in_end' now points to the last pbuf from 'in' */
Michael J. Spencer 1:f5ac63519541 708 if (in_end == netif->loop_last) {
Michael J. Spencer 1:f5ac63519541 709 /* this was the last pbuf in the list */
Michael J. Spencer 1:f5ac63519541 710 netif->loop_first = netif->loop_last = NULL;
Michael J. Spencer 1:f5ac63519541 711 } else {
Michael J. Spencer 1:f5ac63519541 712 /* pop the pbuf off the list */
Michael J. Spencer 1:f5ac63519541 713 netif->loop_first = in_end->next;
Michael J. Spencer 1:f5ac63519541 714 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
Michael J. Spencer 1:f5ac63519541 715 }
Michael J. Spencer 1:f5ac63519541 716 /* De-queue the pbuf from its successors on the 'loop_' list. */
Michael J. Spencer 1:f5ac63519541 717 in_end->next = NULL;
Michael J. Spencer 1:f5ac63519541 718 }
Michael J. Spencer 1:f5ac63519541 719 SYS_ARCH_UNPROTECT(lev);
Michael J. Spencer 1:f5ac63519541 720
Michael J. Spencer 1:f5ac63519541 721 if (in != NULL) {
Michael J. Spencer 1:f5ac63519541 722 LINK_STATS_INC(link.recv);
Michael J. Spencer 1:f5ac63519541 723 snmp_add_ifinoctets(stats_if, in->tot_len);
Michael J. Spencer 1:f5ac63519541 724 snmp_inc_ifinucastpkts(stats_if);
Michael J. Spencer 1:f5ac63519541 725 /* loopback packets are always IP packets! */
Michael J. Spencer 1:f5ac63519541 726 if (ip_input(in, netif) != ERR_OK) {
Michael J. Spencer 1:f5ac63519541 727 pbuf_free(in);
Michael J. Spencer 1:f5ac63519541 728 }
Michael J. Spencer 1:f5ac63519541 729 /* Don't reference the packet any more! */
Michael J. Spencer 1:f5ac63519541 730 in = NULL;
Michael J. Spencer 1:f5ac63519541 731 }
Michael J. Spencer 1:f5ac63519541 732 /* go on while there is a packet on the list */
Michael J. Spencer 1:f5ac63519541 733 } while (netif->loop_first != NULL);
Michael J. Spencer 1:f5ac63519541 734 }
Michael J. Spencer 1:f5ac63519541 735
Michael J. Spencer 1:f5ac63519541 736 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
Michael J. Spencer 1:f5ac63519541 737 /**
Michael J. Spencer 1:f5ac63519541 738 * Calls netif_poll() for every netif on the netif_list.
Michael J. Spencer 1:f5ac63519541 739 */
Michael J. Spencer 1:f5ac63519541 740 void
Michael J. Spencer 1:f5ac63519541 741 netif_poll_all(void)
Michael J. Spencer 1:f5ac63519541 742 {
Michael J. Spencer 1:f5ac63519541 743 struct netif *netif = netif_list;
Michael J. Spencer 1:f5ac63519541 744 /* loop through netifs */
Michael J. Spencer 1:f5ac63519541 745 while (netif != NULL) {
Michael J. Spencer 1:f5ac63519541 746 netif_poll(netif);
Michael J. Spencer 1:f5ac63519541 747 /* proceed to next network interface */
Michael J. Spencer 1:f5ac63519541 748 netif = netif->next;
Michael J. Spencer 1:f5ac63519541 749 }
Michael J. Spencer 1:f5ac63519541 750 }
Michael J. Spencer 1:f5ac63519541 751 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
Michael J. Spencer 1:f5ac63519541 752 #endif /* ENABLE_LOOPBACK */