Pascal Nysten / lwip

Adapted to Lora Semtech + Nucleo

Dependencies:   DebugLib

Dependents:   LoRaWAN-lmic-app LoRaWAN-lmic-app LoRaWAN-test-10secs LoRaPersonalizedDeviceForEverynet ... more

Fork of lwip_ppp_ethernet by Donatien Garnier

src/core/netif.c@3:a9e6ba815945, 2015-11-20 (annotated)

Committer:
pnysten
Date:
Fri Nov 20 12:30:58 2015 +0000
Revision:
3:a9e6ba815945
Parent:
0:8e01dca41002 
Adapted to Nucleo, LoRa Semtech

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8e01dca41002 1 /**
donatien 0:8e01dca41002 2 * @file
donatien 0:8e01dca41002 3 * lwIP network interface abstraction
donatien 0:8e01dca41002 4 *
donatien 0:8e01dca41002 5 */
donatien 0:8e01dca41002 6
donatien 0:8e01dca41002 7 /*
donatien 0:8e01dca41002 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:8e01dca41002 9 * All rights reserved.
donatien 0:8e01dca41002 10 *
donatien 0:8e01dca41002 11 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:8e01dca41002 12 * are permitted provided that the following conditions are met:
donatien 0:8e01dca41002 13 *
donatien 0:8e01dca41002 14 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:8e01dca41002 15 * this list of conditions and the following disclaimer.
donatien 0:8e01dca41002 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:8e01dca41002 17 * this list of conditions and the following disclaimer in the documentation
donatien 0:8e01dca41002 18 * and/or other materials provided with the distribution.
donatien 0:8e01dca41002 19 * 3. The name of the author may not be used to endorse or promote products
donatien 0:8e01dca41002 20 * derived from this software without specific prior written permission.
donatien 0:8e01dca41002 21 *
donatien 0:8e01dca41002 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:8e01dca41002 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:8e01dca41002 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:8e01dca41002 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:8e01dca41002 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:8e01dca41002 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:8e01dca41002 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:8e01dca41002 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:8e01dca41002 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:8e01dca41002 31 * OF SUCH DAMAGE.
donatien 0:8e01dca41002 32 *
donatien 0:8e01dca41002 33 * This file is part of the lwIP TCP/IP stack.
donatien 0:8e01dca41002 34 *
donatien 0:8e01dca41002 35 * Author: Adam Dunkels <adam@sics.se>
donatien 0:8e01dca41002 36 *
donatien 0:8e01dca41002 37 */
donatien 0:8e01dca41002 38
donatien 0:8e01dca41002 39 #include "lwip/opt.h"
donatien 0:8e01dca41002 40
donatien 0:8e01dca41002 41 #include "lwip/def.h"
donatien 0:8e01dca41002 42 #include "lwip/ip_addr.h"
donatien 0:8e01dca41002 43 #include "lwip/netif.h"
donatien 0:8e01dca41002 44 #include "lwip/tcp_impl.h"
donatien 0:8e01dca41002 45 #include "lwip/snmp.h"
donatien 0:8e01dca41002 46 #include "lwip/igmp.h"
donatien 0:8e01dca41002 47 #include "netif/etharp.h"
donatien 0:8e01dca41002 48 #include "lwip/stats.h"
donatien 0:8e01dca41002 49 #if ENABLE_LOOPBACK
donatien 0:8e01dca41002 50 #include "lwip/sys.h"
donatien 0:8e01dca41002 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
donatien 0:8e01dca41002 52 #include "lwip/tcpip.h"
donatien 0:8e01dca41002 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
donatien 0:8e01dca41002 54 #endif /* ENABLE_LOOPBACK */
donatien 0:8e01dca41002 55
donatien 0:8e01dca41002 56 #if LWIP_AUTOIP
donatien 0:8e01dca41002 57 #include "lwip/autoip.h"
donatien 0:8e01dca41002 58 #endif /* LWIP_AUTOIP */
donatien 0:8e01dca41002 59 #if LWIP_DHCP
donatien 0:8e01dca41002 60 #include "lwip/dhcp.h"
donatien 0:8e01dca41002 61 #endif /* LWIP_DHCP */
donatien 0:8e01dca41002 62
donatien 0:8e01dca41002 63 #if LWIP_NETIF_STATUS_CALLBACK
donatien 0:8e01dca41002 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
donatien 0:8e01dca41002 65 #else
donatien 0:8e01dca41002 66 #define NETIF_STATUS_CALLBACK(n)
donatien 0:8e01dca41002 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
donatien 0:8e01dca41002 68
donatien 0:8e01dca41002 69 #if LWIP_NETIF_LINK_CALLBACK
donatien 0:8e01dca41002 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
donatien 0:8e01dca41002 71 #else
donatien 0:8e01dca41002 72 #define NETIF_LINK_CALLBACK(n)
donatien 0:8e01dca41002 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
donatien 0:8e01dca41002 74
donatien 0:8e01dca41002 75 struct netif *netif_list;
donatien 0:8e01dca41002 76 struct netif *netif_default;
donatien 0:8e01dca41002 77
donatien 0:8e01dca41002 78 #if LWIP_HAVE_LOOPIF
donatien 0:8e01dca41002 79 static struct netif loop_netif;
donatien 0:8e01dca41002 80
donatien 0:8e01dca41002 81 /**
donatien 0:8e01dca41002 82 * Initialize a lwip network interface structure for a loopback interface
donatien 0:8e01dca41002 83 *
donatien 0:8e01dca41002 84 * @param netif the lwip network interface structure for this loopif
donatien 0:8e01dca41002 85 * @return ERR_OK if the loopif is initialized
donatien 0:8e01dca41002 86 * ERR_MEM if private data couldn't be allocated
donatien 0:8e01dca41002 87 */
donatien 0:8e01dca41002 88 static err_t
donatien 0:8e01dca41002 89 netif_loopif_init(struct netif *netif)
donatien 0:8e01dca41002 90 {
donatien 0:8e01dca41002 91 /* initialize the snmp variables and counters inside the struct netif
donatien 0:8e01dca41002 92 * ifSpeed: no assumption can be made!
donatien 0:8e01dca41002 93 */
donatien 0:8e01dca41002 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
donatien 0:8e01dca41002 95
donatien 0:8e01dca41002 96 netif->name[0] = 'l';
donatien 0:8e01dca41002 97 netif->name[1] = 'o';
donatien 0:8e01dca41002 98 netif->output = netif_loop_output;
donatien 0:8e01dca41002 99 return ERR_OK;
donatien 0:8e01dca41002 100 }
donatien 0:8e01dca41002 101 #endif /* LWIP_HAVE_LOOPIF */
donatien 0:8e01dca41002 102
donatien 0:8e01dca41002 103 void
donatien 0:8e01dca41002 104 netif_init(void)
donatien 0:8e01dca41002 105 {
donatien 0:8e01dca41002 106 #if LWIP_HAVE_LOOPIF
donatien 0:8e01dca41002 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
donatien 0:8e01dca41002 108 IP4_ADDR(&loop_gw, 127,0,0,1);
donatien 0:8e01dca41002 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
donatien 0:8e01dca41002 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
donatien 0:8e01dca41002 111
donatien 0:8e01dca41002 112 #if NO_SYS
donatien 0:8e01dca41002 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
donatien 0:8e01dca41002 114 #else /* NO_SYS */
donatien 0:8e01dca41002 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
donatien 0:8e01dca41002 116 #endif /* NO_SYS */
donatien 0:8e01dca41002 117 netif_set_up(&loop_netif);
donatien 0:8e01dca41002 118
donatien 0:8e01dca41002 119 #endif /* LWIP_HAVE_LOOPIF */
donatien 0:8e01dca41002 120 }
donatien 0:8e01dca41002 121
donatien 0:8e01dca41002 122 /**
donatien 0:8e01dca41002 123 * Add a network interface to the list of lwIP netifs.
donatien 0:8e01dca41002 124 *
donatien 0:8e01dca41002 125 * @param netif a pre-allocated netif structure
donatien 0:8e01dca41002 126 * @param ipaddr IP address for the new netif
donatien 0:8e01dca41002 127 * @param netmask network mask for the new netif
donatien 0:8e01dca41002 128 * @param gw default gateway IP address for the new netif
donatien 0:8e01dca41002 129 * @param state opaque data passed to the new netif
donatien 0:8e01dca41002 130 * @param init callback function that initializes the interface
donatien 0:8e01dca41002 131 * @param input callback function that is called to pass
donatien 0:8e01dca41002 132 * ingress packets up in the protocol layer stack.
donatien 0:8e01dca41002 133 *
donatien 0:8e01dca41002 134 * @return netif, or NULL if failed.
donatien 0:8e01dca41002 135 */
donatien 0:8e01dca41002 136 struct netif *
donatien 0:8e01dca41002 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
donatien 0:8e01dca41002 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
donatien 0:8e01dca41002 139 {
donatien 0:8e01dca41002 140 static u8_t netifnum = 0;
donatien 0:8e01dca41002 141
donatien 0:8e01dca41002 142 LWIP_ASSERT("No init function given", init != NULL);
donatien 0:8e01dca41002 143
donatien 0:8e01dca41002 144 /* reset new interface configuration state */
donatien 0:8e01dca41002 145 ip_addr_set_zero(&netif->ip_addr);
donatien 0:8e01dca41002 146 ip_addr_set_zero(&netif->netmask);
donatien 0:8e01dca41002 147 ip_addr_set_zero(&netif->gw);
donatien 0:8e01dca41002 148 netif->flags = 0;
donatien 0:8e01dca41002 149 #if LWIP_DHCP
donatien 0:8e01dca41002 150 /* netif not under DHCP control by default */
donatien 0:8e01dca41002 151 netif->dhcp = NULL;
donatien 0:8e01dca41002 152 #endif /* LWIP_DHCP */
donatien 0:8e01dca41002 153 #if LWIP_AUTOIP
donatien 0:8e01dca41002 154 /* netif not under AutoIP control by default */
donatien 0:8e01dca41002 155 netif->autoip = NULL;
donatien 0:8e01dca41002 156 #endif /* LWIP_AUTOIP */
donatien 0:8e01dca41002 157 #if LWIP_NETIF_STATUS_CALLBACK
donatien 0:8e01dca41002 158 netif->status_callback = NULL;
donatien 0:8e01dca41002 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
donatien 0:8e01dca41002 160 #if LWIP_NETIF_LINK_CALLBACK
donatien 0:8e01dca41002 161 netif->link_callback = NULL;
donatien 0:8e01dca41002 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
donatien 0:8e01dca41002 163 #if LWIP_IGMP
donatien 0:8e01dca41002 164 netif->igmp_mac_filter = NULL;
donatien 0:8e01dca41002 165 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 166 #if ENABLE_LOOPBACK
donatien 0:8e01dca41002 167 netif->loop_first = NULL;
donatien 0:8e01dca41002 168 netif->loop_last = NULL;
donatien 0:8e01dca41002 169 #endif /* ENABLE_LOOPBACK */
donatien 0:8e01dca41002 170
donatien 0:8e01dca41002 171 /* remember netif specific state information data */
donatien 0:8e01dca41002 172 netif->state = state;
donatien 0:8e01dca41002 173 netif->num = netifnum++;
donatien 0:8e01dca41002 174 netif->input = input;
donatien 0:8e01dca41002 175 #if LWIP_NETIF_HWADDRHINT
donatien 0:8e01dca41002 176 netif->addr_hint = NULL;
donatien 0:8e01dca41002 177 #endif /* LWIP_NETIF_HWADDRHINT*/
donatien 0:8e01dca41002 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
donatien 0:8e01dca41002 179 netif->loop_cnt_current = 0;
donatien 0:8e01dca41002 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
donatien 0:8e01dca41002 181
donatien 0:8e01dca41002 182 netif_set_addr(netif, ipaddr, netmask, gw);
donatien 0:8e01dca41002 183
donatien 0:8e01dca41002 184 /* call user specified initialization function for netif */
donatien 0:8e01dca41002 185 if (init(netif) != ERR_OK) {
donatien 0:8e01dca41002 186 return NULL;
donatien 0:8e01dca41002 187 }
donatien 0:8e01dca41002 188
donatien 0:8e01dca41002 189 /* add this netif to the list */
donatien 0:8e01dca41002 190 netif->next = netif_list;
donatien 0:8e01dca41002 191 netif_list = netif;
donatien 0:8e01dca41002 192 snmp_inc_iflist();
donatien 0:8e01dca41002 193
donatien 0:8e01dca41002 194 #if LWIP_IGMP
donatien 0:8e01dca41002 195 /* start IGMP processing */
donatien 0:8e01dca41002 196 if (netif->flags & NETIF_FLAG_IGMP) {
donatien 0:8e01dca41002 197 igmp_start(netif);
donatien 0:8e01dca41002 198 }
donatien 0:8e01dca41002 199 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 200
donatien 0:8e01dca41002 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
donatien 0:8e01dca41002 202 netif->name[0], netif->name[1]));
donatien 0:8e01dca41002 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
donatien 0:8e01dca41002 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
donatien 0:8e01dca41002 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
donatien 0:8e01dca41002 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
donatien 0:8e01dca41002 207 ip_addr_debug_print(NETIF_DEBUG, gw);
donatien 0:8e01dca41002 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
donatien 0:8e01dca41002 209 return netif;
donatien 0:8e01dca41002 210 }
donatien 0:8e01dca41002 211
donatien 0:8e01dca41002 212 /**
donatien 0:8e01dca41002 213 * Change IP address configuration for a network interface (including netmask
donatien 0:8e01dca41002 214 * and default gateway).
donatien 0:8e01dca41002 215 *
donatien 0:8e01dca41002 216 * @param netif the network interface to change
donatien 0:8e01dca41002 217 * @param ipaddr the new IP address
donatien 0:8e01dca41002 218 * @param netmask the new netmask
donatien 0:8e01dca41002 219 * @param gw the new default gateway
donatien 0:8e01dca41002 220 */
donatien 0:8e01dca41002 221 void
donatien 0:8e01dca41002 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
donatien 0:8e01dca41002 223 ip_addr_t *gw)
donatien 0:8e01dca41002 224 {
donatien 0:8e01dca41002 225 netif_set_ipaddr(netif, ipaddr);
donatien 0:8e01dca41002 226 netif_set_netmask(netif, netmask);
donatien 0:8e01dca41002 227 netif_set_gw(netif, gw);
donatien 0:8e01dca41002 228 }
donatien 0:8e01dca41002 229
donatien 0:8e01dca41002 230 /**
donatien 0:8e01dca41002 231 * Remove a network interface from the list of lwIP netifs.
donatien 0:8e01dca41002 232 *
donatien 0:8e01dca41002 233 * @param netif the network interface to remove
donatien 0:8e01dca41002 234 */
donatien 0:8e01dca41002 235 void
donatien 0:8e01dca41002 236 netif_remove(struct netif *netif)
donatien 0:8e01dca41002 237 {
donatien 0:8e01dca41002 238 if (netif == NULL) {
donatien 0:8e01dca41002 239 return;
donatien 0:8e01dca41002 240 }
donatien 0:8e01dca41002 241
donatien 0:8e01dca41002 242 #if LWIP_IGMP
donatien 0:8e01dca41002 243 /* stop IGMP processing */
donatien 0:8e01dca41002 244 if (netif->flags & NETIF_FLAG_IGMP) {
donatien 0:8e01dca41002 245 igmp_stop(netif);
donatien 0:8e01dca41002 246 }
donatien 0:8e01dca41002 247 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 248 if (netif_is_up(netif)) {
donatien 0:8e01dca41002 249 /* set netif down before removing (call callback function) */
donatien 0:8e01dca41002 250 netif_set_down(netif);
donatien 0:8e01dca41002 251 }
donatien 0:8e01dca41002 252
donatien 0:8e01dca41002 253 snmp_delete_ipaddridx_tree(netif);
donatien 0:8e01dca41002 254
donatien 0:8e01dca41002 255 /* is it the first netif? */
donatien 0:8e01dca41002 256 if (netif_list == netif) {
donatien 0:8e01dca41002 257 netif_list = netif->next;
donatien 0:8e01dca41002 258 } else {
donatien 0:8e01dca41002 259 /* look for netif further down the list */
donatien 0:8e01dca41002 260 struct netif * tmpNetif;
donatien 0:8e01dca41002 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
donatien 0:8e01dca41002 262 if (tmpNetif->next == netif) {
donatien 0:8e01dca41002 263 tmpNetif->next = netif->next;
donatien 0:8e01dca41002 264 break;
donatien 0:8e01dca41002 265 }
donatien 0:8e01dca41002 266 }
donatien 0:8e01dca41002 267 if (tmpNetif == NULL)
donatien 0:8e01dca41002 268 return; /* we didn't find any netif today */
donatien 0:8e01dca41002 269 }
donatien 0:8e01dca41002 270 snmp_dec_iflist();
donatien 0:8e01dca41002 271 /* this netif is default? */
donatien 0:8e01dca41002 272 if (netif_default == netif) {
donatien 0:8e01dca41002 273 /* reset default netif */
donatien 0:8e01dca41002 274 netif_set_default(NULL);
donatien 0:8e01dca41002 275 }
donatien 0:8e01dca41002 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
donatien 0:8e01dca41002 277 }
donatien 0:8e01dca41002 278
donatien 0:8e01dca41002 279 /**
donatien 0:8e01dca41002 280 * Find a network interface by searching for its name
donatien 0:8e01dca41002 281 *
donatien 0:8e01dca41002 282 * @param name the name of the netif (like netif->name) plus concatenated number
donatien 0:8e01dca41002 283 * in ascii representation (e.g. 'en0')
donatien 0:8e01dca41002 284 */
donatien 0:8e01dca41002 285 struct netif *
donatien 0:8e01dca41002 286 netif_find(char *name)
donatien 0:8e01dca41002 287 {
donatien 0:8e01dca41002 288 struct netif *netif;
donatien 0:8e01dca41002 289 u8_t num;
donatien 0:8e01dca41002 290
donatien 0:8e01dca41002 291 if (name == NULL) {
donatien 0:8e01dca41002 292 return NULL;
donatien 0:8e01dca41002 293 }
donatien 0:8e01dca41002 294
donatien 0:8e01dca41002 295 num = name[2] - '0';
donatien 0:8e01dca41002 296
donatien 0:8e01dca41002 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
donatien 0:8e01dca41002 298 if (num == netif->num &&
donatien 0:8e01dca41002 299 name[0] == netif->name[0] &&
donatien 0:8e01dca41002 300 name[1] == netif->name[1]) {
donatien 0:8e01dca41002 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
donatien 0:8e01dca41002 302 return netif;
donatien 0:8e01dca41002 303 }
donatien 0:8e01dca41002 304 }
donatien 0:8e01dca41002 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
donatien 0:8e01dca41002 306 return NULL;
donatien 0:8e01dca41002 307 }
donatien 0:8e01dca41002 308
donatien 0:8e01dca41002 309 /**
donatien 0:8e01dca41002 310 * Change the IP address of a network interface
donatien 0:8e01dca41002 311 *
donatien 0:8e01dca41002 312 * @param netif the network interface to change
donatien 0:8e01dca41002 313 * @param ipaddr the new IP address
donatien 0:8e01dca41002 314 *
donatien 0:8e01dca41002 315 * @note call netif_set_addr() if you also want to change netmask and
donatien 0:8e01dca41002 316 * default gateway
donatien 0:8e01dca41002 317 */
donatien 0:8e01dca41002 318 void
donatien 0:8e01dca41002 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
donatien 0:8e01dca41002 320 {
donatien 0:8e01dca41002 321 /* TODO: Handling of obsolete pcbs */
donatien 0:8e01dca41002 322 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
donatien 0:8e01dca41002 323 #if LWIP_TCP
donatien 0:8e01dca41002 324 struct tcp_pcb *pcb;
donatien 0:8e01dca41002 325 struct tcp_pcb_listen *lpcb;
donatien 0:8e01dca41002 326
donatien 0:8e01dca41002 327 /* address is actually being changed? */
donatien 0:8e01dca41002 328 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
donatien 0:8e01dca41002 329 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
donatien 0:8e01dca41002 330 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
donatien 0:8e01dca41002 331 pcb = tcp_active_pcbs;
donatien 0:8e01dca41002 332 while (pcb != NULL) {
donatien 0:8e01dca41002 333 /* PCB bound to current local interface address? */
donatien 0:8e01dca41002 334 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
donatien 0:8e01dca41002 335 #if LWIP_AUTOIP
donatien 0:8e01dca41002 336 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
donatien 0:8e01dca41002 337 && !ip_addr_islinklocal(&(pcb->local_ip))
donatien 0:8e01dca41002 338 #endif /* LWIP_AUTOIP */
donatien 0:8e01dca41002 339 ) {
donatien 0:8e01dca41002 340 /* this connection must be aborted */
donatien 0:8e01dca41002 341 struct tcp_pcb *next = pcb->next;
donatien 0:8e01dca41002 342 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
donatien 0:8e01dca41002 343 tcp_abort(pcb);
donatien 0:8e01dca41002 344 pcb = next;
donatien 0:8e01dca41002 345 } else {
donatien 0:8e01dca41002 346 pcb = pcb->next;
donatien 0:8e01dca41002 347 }
donatien 0:8e01dca41002 348 }
donatien 0:8e01dca41002 349 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
donatien 0:8e01dca41002 350 /* PCB bound to current local interface address? */
donatien 0:8e01dca41002 351 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
donatien 0:8e01dca41002 352 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
donatien 0:8e01dca41002 353 /* The PCB is listening to the old ipaddr and
donatien 0:8e01dca41002 354 * is set to listen to the new one instead */
donatien 0:8e01dca41002 355 ip_addr_set(&(lpcb->local_ip), ipaddr);
donatien 0:8e01dca41002 356 }
donatien 0:8e01dca41002 357 }
donatien 0:8e01dca41002 358 }
donatien 0:8e01dca41002 359 #endif
donatien 0:8e01dca41002 360 snmp_delete_ipaddridx_tree(netif);
donatien 0:8e01dca41002 361 snmp_delete_iprteidx_tree(0,netif);
donatien 0:8e01dca41002 362 /* set new IP address to netif */
donatien 0:8e01dca41002 363 ip_addr_set(&(netif->ip_addr), ipaddr);
donatien 0:8e01dca41002 364 snmp_insert_ipaddridx_tree(netif);
donatien 0:8e01dca41002 365 snmp_insert_iprteidx_tree(0,netif);
donatien 0:8e01dca41002 366
donatien 0:8e01dca41002 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",
donatien 0:8e01dca41002 368 netif->name[0], netif->name[1],
donatien 0:8e01dca41002 369 ip4_addr1_16(&netif->ip_addr),
donatien 0:8e01dca41002 370 ip4_addr2_16(&netif->ip_addr),
donatien 0:8e01dca41002 371 ip4_addr3_16(&netif->ip_addr),
donatien 0:8e01dca41002 372 ip4_addr4_16(&netif->ip_addr)));
donatien 0:8e01dca41002 373 }
donatien 0:8e01dca41002 374
donatien 0:8e01dca41002 375 /**
donatien 0:8e01dca41002 376 * Change the default gateway for a network interface
donatien 0:8e01dca41002 377 *
donatien 0:8e01dca41002 378 * @param netif the network interface to change
donatien 0:8e01dca41002 379 * @param gw the new default gateway
donatien 0:8e01dca41002 380 *
donatien 0:8e01dca41002 381 * @note call netif_set_addr() if you also want to change ip address and netmask
donatien 0:8e01dca41002 382 */
donatien 0:8e01dca41002 383 void
donatien 0:8e01dca41002 384 netif_set_gw(struct netif *netif, ip_addr_t *gw)
donatien 0:8e01dca41002 385 {
donatien 0:8e01dca41002 386 ip_addr_set(&(netif->gw), gw);
donatien 0:8e01dca41002 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",
donatien 0:8e01dca41002 388 netif->name[0], netif->name[1],
donatien 0:8e01dca41002 389 ip4_addr1_16(&netif->gw),
donatien 0:8e01dca41002 390 ip4_addr2_16(&netif->gw),
donatien 0:8e01dca41002 391 ip4_addr3_16(&netif->gw),
donatien 0:8e01dca41002 392 ip4_addr4_16(&netif->gw)));
donatien 0:8e01dca41002 393 }
donatien 0:8e01dca41002 394
donatien 0:8e01dca41002 395 /**
donatien 0:8e01dca41002 396 * Change the netmask of a network interface
donatien 0:8e01dca41002 397 *
donatien 0:8e01dca41002 398 * @param netif the network interface to change
donatien 0:8e01dca41002 399 * @param netmask the new netmask
donatien 0:8e01dca41002 400 *
donatien 0:8e01dca41002 401 * @note call netif_set_addr() if you also want to change ip address and
donatien 0:8e01dca41002 402 * default gateway
donatien 0:8e01dca41002 403 */
donatien 0:8e01dca41002 404 void
donatien 0:8e01dca41002 405 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
donatien 0:8e01dca41002 406 {
donatien 0:8e01dca41002 407 snmp_delete_iprteidx_tree(0, netif);
donatien 0:8e01dca41002 408 /* set new netmask to netif */
donatien 0:8e01dca41002 409 ip_addr_set(&(netif->netmask), netmask);
donatien 0:8e01dca41002 410 snmp_insert_iprteidx_tree(0, netif);
donatien 0:8e01dca41002 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",
donatien 0:8e01dca41002 412 netif->name[0], netif->name[1],
donatien 0:8e01dca41002 413 ip4_addr1_16(&netif->netmask),
donatien 0:8e01dca41002 414 ip4_addr2_16(&netif->netmask),
donatien 0:8e01dca41002 415 ip4_addr3_16(&netif->netmask),
donatien 0:8e01dca41002 416 ip4_addr4_16(&netif->netmask)));
donatien 0:8e01dca41002 417 }
donatien 0:8e01dca41002 418
donatien 0:8e01dca41002 419 /**
donatien 0:8e01dca41002 420 * Set a network interface as the default network interface
donatien 0:8e01dca41002 421 * (used to output all packets for which no specific route is found)
donatien 0:8e01dca41002 422 *
donatien 0:8e01dca41002 423 * @param netif the default network interface
donatien 0:8e01dca41002 424 */
donatien 0:8e01dca41002 425 void
donatien 0:8e01dca41002 426 netif_set_default(struct netif *netif)
donatien 0:8e01dca41002 427 {
donatien 0:8e01dca41002 428 if (netif == NULL) {
donatien 0:8e01dca41002 429 /* remove default route */
donatien 0:8e01dca41002 430 snmp_delete_iprteidx_tree(1, netif);
donatien 0:8e01dca41002 431 } else {
donatien 0:8e01dca41002 432 /* install default route */
donatien 0:8e01dca41002 433 snmp_insert_iprteidx_tree(1, netif);
donatien 0:8e01dca41002 434 }
donatien 0:8e01dca41002 435 netif_default = netif;
donatien 0:8e01dca41002 436 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
donatien 0:8e01dca41002 437 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
donatien 0:8e01dca41002 438 }
donatien 0:8e01dca41002 439
donatien 0:8e01dca41002 440 /**
donatien 0:8e01dca41002 441 * Bring an interface up, available for processing
donatien 0:8e01dca41002 442 * traffic.
donatien 0:8e01dca41002 443 *
donatien 0:8e01dca41002 444 * @note: Enabling DHCP on a down interface will make it come
donatien 0:8e01dca41002 445 * up once configured.
donatien 0:8e01dca41002 446 *
donatien 0:8e01dca41002 447 * @see dhcp_start()
donatien 0:8e01dca41002 448 */
donatien 0:8e01dca41002 449 void netif_set_up(struct netif *netif)
donatien 0:8e01dca41002 450 {
donatien 0:8e01dca41002 451 if (!(netif->flags & NETIF_FLAG_UP)) {
donatien 0:8e01dca41002 452 netif->flags |= NETIF_FLAG_UP;
donatien 0:8e01dca41002 453
donatien 0:8e01dca41002 454 #if LWIP_SNMP
donatien 0:8e01dca41002 455 snmp_get_sysuptime(&netif->ts);
donatien 0:8e01dca41002 456 #endif /* LWIP_SNMP */
donatien 0:8e01dca41002 457
donatien 0:8e01dca41002 458 NETIF_STATUS_CALLBACK(netif);
donatien 0:8e01dca41002 459
donatien 0:8e01dca41002 460 if (netif->flags & NETIF_FLAG_LINK_UP) {
donatien 0:8e01dca41002 461 #if LWIP_ARP
donatien 0:8e01dca41002 462 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
donatien 0:8e01dca41002 463 if (netif->flags & (NETIF_FLAG_ETHARP)) {
donatien 0:8e01dca41002 464 etharp_gratuitous(netif);
donatien 0:8e01dca41002 465 }
donatien 0:8e01dca41002 466 #endif /* LWIP_ARP */
donatien 0:8e01dca41002 467
donatien 0:8e01dca41002 468 #if LWIP_IGMP
donatien 0:8e01dca41002 469 /* resend IGMP memberships */
donatien 0:8e01dca41002 470 if (netif->flags & NETIF_FLAG_IGMP) {
donatien 0:8e01dca41002 471 igmp_report_groups( netif);
donatien 0:8e01dca41002 472 }
donatien 0:8e01dca41002 473 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 474 }
donatien 0:8e01dca41002 475 }
donatien 0:8e01dca41002 476 }
donatien 0:8e01dca41002 477
donatien 0:8e01dca41002 478 /**
donatien 0:8e01dca41002 479 * Bring an interface down, disabling any traffic processing.
donatien 0:8e01dca41002 480 *
donatien 0:8e01dca41002 481 * @note: Enabling DHCP on a down interface will make it come
donatien 0:8e01dca41002 482 * up once configured.
donatien 0:8e01dca41002 483 *
donatien 0:8e01dca41002 484 * @see dhcp_start()
donatien 0:8e01dca41002 485 */
donatien 0:8e01dca41002 486 void netif_set_down(struct netif *netif)
donatien 0:8e01dca41002 487 {
donatien 0:8e01dca41002 488 if (netif->flags & NETIF_FLAG_UP) {
donatien 0:8e01dca41002 489 netif->flags &= ~NETIF_FLAG_UP;
donatien 0:8e01dca41002 490 #if LWIP_SNMP
donatien 0:8e01dca41002 491 snmp_get_sysuptime(&netif->ts);
donatien 0:8e01dca41002 492 #endif
donatien 0:8e01dca41002 493
donatien 0:8e01dca41002 494 NETIF_STATUS_CALLBACK(netif);
donatien 0:8e01dca41002 495 }
donatien 0:8e01dca41002 496 }
donatien 0:8e01dca41002 497
donatien 0:8e01dca41002 498 #if LWIP_NETIF_STATUS_CALLBACK
donatien 0:8e01dca41002 499 /**
donatien 0:8e01dca41002 500 * Set callback to be called when interface is brought up/down
donatien 0:8e01dca41002 501 */
donatien 0:8e01dca41002 502 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
donatien 0:8e01dca41002 503 {
donatien 0:8e01dca41002 504 if (netif) {
donatien 0:8e01dca41002 505 netif->status_callback = status_callback;
donatien 0:8e01dca41002 506 }
donatien 0:8e01dca41002 507 }
donatien 0:8e01dca41002 508 #endif /* LWIP_NETIF_STATUS_CALLBACK */
donatien 0:8e01dca41002 509
donatien 0:8e01dca41002 510 /**
donatien 0:8e01dca41002 511 * Called by a driver when its link goes up
donatien 0:8e01dca41002 512 */
donatien 0:8e01dca41002 513 void netif_set_link_up(struct netif *netif )
donatien 0:8e01dca41002 514 {
donatien 0:8e01dca41002 515 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
donatien 0:8e01dca41002 516 netif->flags |= NETIF_FLAG_LINK_UP;
donatien 0:8e01dca41002 517
donatien 0:8e01dca41002 518 #if LWIP_DHCP
donatien 0:8e01dca41002 519 if (netif->dhcp) {
donatien 0:8e01dca41002 520 dhcp_network_changed(netif);
donatien 0:8e01dca41002 521 }
donatien 0:8e01dca41002 522 #endif /* LWIP_DHCP */
donatien 0:8e01dca41002 523
donatien 0:8e01dca41002 524 #if LWIP_AUTOIP
donatien 0:8e01dca41002 525 if (netif->autoip) {
donatien 0:8e01dca41002 526 autoip_network_changed(netif);
donatien 0:8e01dca41002 527 }
donatien 0:8e01dca41002 528 #endif /* LWIP_AUTOIP */
donatien 0:8e01dca41002 529
donatien 0:8e01dca41002 530 if (netif->flags & NETIF_FLAG_UP) {
donatien 0:8e01dca41002 531 #if LWIP_ARP
donatien 0:8e01dca41002 532 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
donatien 0:8e01dca41002 533 if (netif->flags & NETIF_FLAG_ETHARP) {
donatien 0:8e01dca41002 534 etharp_gratuitous(netif);
donatien 0:8e01dca41002 535 }
donatien 0:8e01dca41002 536 #endif /* LWIP_ARP */
donatien 0:8e01dca41002 537
donatien 0:8e01dca41002 538 #if LWIP_IGMP
donatien 0:8e01dca41002 539 /* resend IGMP memberships */
donatien 0:8e01dca41002 540 if (netif->flags & NETIF_FLAG_IGMP) {
donatien 0:8e01dca41002 541 igmp_report_groups( netif);
donatien 0:8e01dca41002 542 }
donatien 0:8e01dca41002 543 #endif /* LWIP_IGMP */
donatien 0:8e01dca41002 544 }
donatien 0:8e01dca41002 545 NETIF_LINK_CALLBACK(netif);
donatien 0:8e01dca41002 546 }
donatien 0:8e01dca41002 547 }
donatien 0:8e01dca41002 548
donatien 0:8e01dca41002 549 /**
donatien 0:8e01dca41002 550 * Called by a driver when its link goes down
donatien 0:8e01dca41002 551 */
donatien 0:8e01dca41002 552 void netif_set_link_down(struct netif *netif )
donatien 0:8e01dca41002 553 {
donatien 0:8e01dca41002 554 if (netif->flags & NETIF_FLAG_LINK_UP) {
donatien 0:8e01dca41002 555 netif->flags &= ~NETIF_FLAG_LINK_UP;
donatien 0:8e01dca41002 556 NETIF_LINK_CALLBACK(netif);
donatien 0:8e01dca41002 557 }
donatien 0:8e01dca41002 558 }
donatien 0:8e01dca41002 559
donatien 0:8e01dca41002 560 #if LWIP_NETIF_LINK_CALLBACK
donatien 0:8e01dca41002 561 /**
donatien 0:8e01dca41002 562 * Set callback to be called when link is brought up/down
donatien 0:8e01dca41002 563 */
donatien 0:8e01dca41002 564 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
donatien 0:8e01dca41002 565 {
donatien 0:8e01dca41002 566 if (netif) {
donatien 0:8e01dca41002 567 netif->link_callback = link_callback;
donatien 0:8e01dca41002 568 }
donatien 0:8e01dca41002 569 }
donatien 0:8e01dca41002 570 #endif /* LWIP_NETIF_LINK_CALLBACK */
donatien 0:8e01dca41002 571
donatien 0:8e01dca41002 572 #if ENABLE_LOOPBACK
donatien 0:8e01dca41002 573 /**
donatien 0:8e01dca41002 574 * Send an IP packet to be received on the same netif (loopif-like).
donatien 0:8e01dca41002 575 * The pbuf is simply copied and handed back to netif->input.
donatien 0:8e01dca41002 576 * In multithreaded mode, this is done directly since netif->input must put
donatien 0:8e01dca41002 577 * the packet on a queue.
donatien 0:8e01dca41002 578 * In callback mode, the packet is put on an internal queue and is fed to
donatien 0:8e01dca41002 579 * netif->input by netif_poll().
donatien 0:8e01dca41002 580 *
donatien 0:8e01dca41002 581 * @param netif the lwip network interface structure
donatien 0:8e01dca41002 582 * @param p the (IP) packet to 'send'
donatien 0:8e01dca41002 583 * @param ipaddr the ip address to send the packet to (not used)
donatien 0:8e01dca41002 584 * @return ERR_OK if the packet has been sent
donatien 0:8e01dca41002 585 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
donatien 0:8e01dca41002 586 */
donatien 0:8e01dca41002 587 err_t
donatien 0:8e01dca41002 588 netif_loop_output(struct netif *netif, struct pbuf *p,
donatien 0:8e01dca41002 589 ip_addr_t *ipaddr)
donatien 0:8e01dca41002 590 {
donatien 0:8e01dca41002 591 struct pbuf *r;
donatien 0:8e01dca41002 592 err_t err;
donatien 0:8e01dca41002 593 struct pbuf *last;
donatien 0:8e01dca41002 594 #if LWIP_LOOPBACK_MAX_PBUFS
donatien 0:8e01dca41002 595 u8_t clen = 0;
donatien 0:8e01dca41002 596 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
donatien 0:8e01dca41002 597 /* If we have a loopif, SNMP counters are adjusted for it,
donatien 0:8e01dca41002 598 * if not they are adjusted for 'netif'. */
donatien 0:8e01dca41002 599 #if LWIP_SNMP
donatien 0:8e01dca41002 600 #if LWIP_HAVE_LOOPIF
donatien 0:8e01dca41002 601 struct netif *stats_if = &loop_netif;
donatien 0:8e01dca41002 602 #else /* LWIP_HAVE_LOOPIF */
donatien 0:8e01dca41002 603 struct netif *stats_if = netif;
donatien 0:8e01dca41002 604 #endif /* LWIP_HAVE_LOOPIF */
donatien 0:8e01dca41002 605 #endif /* LWIP_SNMP */
donatien 0:8e01dca41002 606 SYS_ARCH_DECL_PROTECT(lev);
donatien 0:8e01dca41002 607 LWIP_UNUSED_ARG(ipaddr);
donatien 0:8e01dca41002 608
donatien 0:8e01dca41002 609 /* Allocate a new pbuf */
donatien 0:8e01dca41002 610 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
donatien 0:8e01dca41002 611 if (r == NULL) {
donatien 0:8e01dca41002 612 LINK_STATS_INC(link.memerr);
donatien 0:8e01dca41002 613 LINK_STATS_INC(link.drop);
donatien 0:8e01dca41002 614 snmp_inc_ifoutdiscards(stats_if);
donatien 0:8e01dca41002 615 return ERR_MEM;
donatien 0:8e01dca41002 616 }
donatien 0:8e01dca41002 617 #if LWIP_LOOPBACK_MAX_PBUFS
donatien 0:8e01dca41002 618 clen = pbuf_clen(r);
donatien 0:8e01dca41002 619 /* check for overflow or too many pbuf on queue */
donatien 0:8e01dca41002 620 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
donatien 0:8e01dca41002 621 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
donatien 0:8e01dca41002 622 pbuf_free(r);
donatien 0:8e01dca41002 623 LINK_STATS_INC(link.memerr);
donatien 0:8e01dca41002 624 LINK_STATS_INC(link.drop);
donatien 0:8e01dca41002 625 snmp_inc_ifoutdiscards(stats_if);
donatien 0:8e01dca41002 626 return ERR_MEM;
donatien 0:8e01dca41002 627 }
donatien 0:8e01dca41002 628 netif->loop_cnt_current += clen;
donatien 0:8e01dca41002 629 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
donatien 0:8e01dca41002 630
donatien 0:8e01dca41002 631 /* Copy the whole pbuf queue p into the single pbuf r */
donatien 0:8e01dca41002 632 if ((err = pbuf_copy(r, p)) != ERR_OK) {
donatien 0:8e01dca41002 633 pbuf_free(r);
donatien 0:8e01dca41002 634 LINK_STATS_INC(link.memerr);
donatien 0:8e01dca41002 635 LINK_STATS_INC(link.drop);
donatien 0:8e01dca41002 636 snmp_inc_ifoutdiscards(stats_if);
donatien 0:8e01dca41002 637 return err;
donatien 0:8e01dca41002 638 }
donatien 0:8e01dca41002 639
donatien 0:8e01dca41002 640 /* Put the packet on a linked list which gets emptied through calling
donatien 0:8e01dca41002 641 netif_poll(). */
donatien 0:8e01dca41002 642
donatien 0:8e01dca41002 643 /* let last point to the last pbuf in chain r */
donatien 0:8e01dca41002 644 for (last = r; last->next != NULL; last = last->next);
donatien 0:8e01dca41002 645
donatien 0:8e01dca41002 646 SYS_ARCH_PROTECT(lev);
donatien 0:8e01dca41002 647 if(netif->loop_first != NULL) {
donatien 0:8e01dca41002 648 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
donatien 0:8e01dca41002 649 netif->loop_last->next = r;
donatien 0:8e01dca41002 650 netif->loop_last = last;
donatien 0:8e01dca41002 651 } else {
donatien 0:8e01dca41002 652 netif->loop_first = r;
donatien 0:8e01dca41002 653 netif->loop_last = last;
donatien 0:8e01dca41002 654 }
donatien 0:8e01dca41002 655 SYS_ARCH_UNPROTECT(lev);
donatien 0:8e01dca41002 656
donatien 0:8e01dca41002 657 LINK_STATS_INC(link.xmit);
donatien 0:8e01dca41002 658 snmp_add_ifoutoctets(stats_if, p->tot_len);
donatien 0:8e01dca41002 659 snmp_inc_ifoutucastpkts(stats_if);
donatien 0:8e01dca41002 660
donatien 0:8e01dca41002 661 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
donatien 0:8e01dca41002 662 /* For multithreading environment, schedule a call to netif_poll */
donatien 0:8e01dca41002 663 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
donatien 0:8e01dca41002 664 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
donatien 0:8e01dca41002 665
donatien 0:8e01dca41002 666 return ERR_OK;
donatien 0:8e01dca41002 667 }
donatien 0:8e01dca41002 668
donatien 0:8e01dca41002 669 /**
donatien 0:8e01dca41002 670 * Call netif_poll() in the main loop of your application. This is to prevent
donatien 0:8e01dca41002 671 * reentering non-reentrant functions like tcp_input(). Packets passed to
donatien 0:8e01dca41002 672 * netif_loop_output() are put on a list that is passed to netif->input() by
donatien 0:8e01dca41002 673 * netif_poll().
donatien 0:8e01dca41002 674 */
donatien 0:8e01dca41002 675 void
donatien 0:8e01dca41002 676 netif_poll(struct netif *netif)
donatien 0:8e01dca41002 677 {
donatien 0:8e01dca41002 678 struct pbuf *in;
donatien 0:8e01dca41002 679 /* If we have a loopif, SNMP counters are adjusted for it,
donatien 0:8e01dca41002 680 * if not they are adjusted for 'netif'. */
donatien 0:8e01dca41002 681 #if LWIP_SNMP
donatien 0:8e01dca41002 682 #if LWIP_HAVE_LOOPIF
donatien 0:8e01dca41002 683 struct netif *stats_if = &loop_netif;
donatien 0:8e01dca41002 684 #else /* LWIP_HAVE_LOOPIF */
donatien 0:8e01dca41002 685 struct netif *stats_if = netif;
donatien 0:8e01dca41002 686 #endif /* LWIP_HAVE_LOOPIF */
donatien 0:8e01dca41002 687 #endif /* LWIP_SNMP */
donatien 0:8e01dca41002 688 SYS_ARCH_DECL_PROTECT(lev);
donatien 0:8e01dca41002 689
donatien 0:8e01dca41002 690 do {
donatien 0:8e01dca41002 691 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
donatien 0:8e01dca41002 692 SYS_ARCH_PROTECT(lev);
donatien 0:8e01dca41002 693 in = netif->loop_first;
donatien 0:8e01dca41002 694 if (in != NULL) {
donatien 0:8e01dca41002 695 struct pbuf *in_end = in;
donatien 0:8e01dca41002 696 #if LWIP_LOOPBACK_MAX_PBUFS
donatien 0:8e01dca41002 697 u8_t clen = pbuf_clen(in);
donatien 0:8e01dca41002 698 /* adjust the number of pbufs on queue */
donatien 0:8e01dca41002 699 LWIP_ASSERT("netif->loop_cnt_current underflow",
donatien 0:8e01dca41002 700 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
donatien 0:8e01dca41002 701 netif->loop_cnt_current -= clen;
donatien 0:8e01dca41002 702 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
donatien 0:8e01dca41002 703 while (in_end->len != in_end->tot_len) {
donatien 0:8e01dca41002 704 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
donatien 0:8e01dca41002 705 in_end = in_end->next;
donatien 0:8e01dca41002 706 }
donatien 0:8e01dca41002 707 /* 'in_end' now points to the last pbuf from 'in' */
donatien 0:8e01dca41002 708 if (in_end == netif->loop_last) {
donatien 0:8e01dca41002 709 /* this was the last pbuf in the list */
donatien 0:8e01dca41002 710 netif->loop_first = netif->loop_last = NULL;
donatien 0:8e01dca41002 711 } else {
donatien 0:8e01dca41002 712 /* pop the pbuf off the list */
donatien 0:8e01dca41002 713 netif->loop_first = in_end->next;
donatien 0:8e01dca41002 714 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
donatien 0:8e01dca41002 715 }
donatien 0:8e01dca41002 716 /* De-queue the pbuf from its successors on the 'loop_' list. */
donatien 0:8e01dca41002 717 in_end->next = NULL;
donatien 0:8e01dca41002 718 }
donatien 0:8e01dca41002 719 SYS_ARCH_UNPROTECT(lev);
donatien 0:8e01dca41002 720
donatien 0:8e01dca41002 721 if (in != NULL) {
donatien 0:8e01dca41002 722 LINK_STATS_INC(link.recv);
donatien 0:8e01dca41002 723 snmp_add_ifinoctets(stats_if, in->tot_len);
donatien 0:8e01dca41002 724 snmp_inc_ifinucastpkts(stats_if);
donatien 0:8e01dca41002 725 /* loopback packets are always IP packets! */
donatien 0:8e01dca41002 726 if (ip_input(in, netif) != ERR_OK) {
donatien 0:8e01dca41002 727 pbuf_free(in);
donatien 0:8e01dca41002 728 }
donatien 0:8e01dca41002 729 /* Don't reference the packet any more! */
donatien 0:8e01dca41002 730 in = NULL;
donatien 0:8e01dca41002 731 }
donatien 0:8e01dca41002 732 /* go on while there is a packet on the list */
donatien 0:8e01dca41002 733 } while (netif->loop_first != NULL);
donatien 0:8e01dca41002 734 }
donatien 0:8e01dca41002 735
donatien 0:8e01dca41002 736 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
donatien 0:8e01dca41002 737 /**
donatien 0:8e01dca41002 738 * Calls netif_poll() for every netif on the netif_list.
donatien 0:8e01dca41002 739 */
donatien 0:8e01dca41002 740 void
donatien 0:8e01dca41002 741 netif_poll_all(void)
donatien 0:8e01dca41002 742 {
donatien 0:8e01dca41002 743 struct netif *netif = netif_list;
donatien 0:8e01dca41002 744 /* loop through netifs */
donatien 0:8e01dca41002 745 while (netif != NULL) {
donatien 0:8e01dca41002 746 netif_poll(netif);
donatien 0:8e01dca41002 747 /* proceed to next network interface */
donatien 0:8e01dca41002 748 netif = netif->next;
donatien 0:8e01dca41002 749 }
donatien 0:8e01dca41002 750 }
donatien 0:8e01dca41002 751 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
donatien 0:8e01dca41002 752 #endif /* ENABLE_LOOPBACK */