Ivan Shindev / lwip

V1

Dependents:   EthernetInterface

Fork of lwip by mbed official

core/netif.c@11:c9233fe7de67, 2013-06-13 (annotated)

Committer:
lemniskata
Date:
Thu Jun 13 20:00:31 2013 +0000
Revision:
11:c9233fe7de67
Parent:
0:51ac1d130fd4 
V1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /**
mbed_official 0:51ac1d130fd4 2 * @file
mbed_official 0:51ac1d130fd4 3 * lwIP network interface abstraction
mbed_official 0:51ac1d130fd4 4 *
mbed_official 0:51ac1d130fd4 5 */
mbed_official 0:51ac1d130fd4 6
mbed_official 0:51ac1d130fd4 7 /*
mbed_official 0:51ac1d130fd4 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed_official 0:51ac1d130fd4 9 * All rights reserved.
mbed_official 0:51ac1d130fd4 10 *
mbed_official 0:51ac1d130fd4 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 0:51ac1d130fd4 12 * are permitted provided that the following conditions are met:
mbed_official 0:51ac1d130fd4 13 *
mbed_official 0:51ac1d130fd4 14 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 0:51ac1d130fd4 15 * this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 0:51ac1d130fd4 17 * this list of conditions and the following disclaimer in the documentation
mbed_official 0:51ac1d130fd4 18 * and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 19 * 3. The name of the author may not be used to endorse or promote products
mbed_official 0:51ac1d130fd4 20 * derived from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 21 *
mbed_official 0:51ac1d130fd4 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed_official 0:51ac1d130fd4 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 0:51ac1d130fd4 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed_official 0:51ac1d130fd4 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed_official 0:51ac1d130fd4 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed_official 0:51ac1d130fd4 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed_official 0:51ac1d130fd4 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed_official 0:51ac1d130fd4 31 * OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 32 *
mbed_official 0:51ac1d130fd4 33 * This file is part of the lwIP TCP/IP stack.
mbed_official 0:51ac1d130fd4 34 *
mbed_official 0:51ac1d130fd4 35 * Author: Adam Dunkels <adam@sics.se>
mbed_official 0:51ac1d130fd4 36 *
mbed_official 0:51ac1d130fd4 37 */
mbed_official 0:51ac1d130fd4 38
mbed_official 0:51ac1d130fd4 39 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 40
mbed_official 0:51ac1d130fd4 41 #include "lwip/def.h"
mbed_official 0:51ac1d130fd4 42 #include "lwip/ip_addr.h"
mbed_official 0:51ac1d130fd4 43 #include "lwip/netif.h"
mbed_official 0:51ac1d130fd4 44 #include "lwip/tcp_impl.h"
mbed_official 0:51ac1d130fd4 45 #include "lwip/snmp.h"
mbed_official 0:51ac1d130fd4 46 #include "lwip/igmp.h"
mbed_official 0:51ac1d130fd4 47 #include "netif/etharp.h"
mbed_official 0:51ac1d130fd4 48 #include "lwip/stats.h"
mbed_official 0:51ac1d130fd4 49 #if ENABLE_LOOPBACK
mbed_official 0:51ac1d130fd4 50 #include "lwip/sys.h"
mbed_official 0:51ac1d130fd4 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
mbed_official 0:51ac1d130fd4 52 #include "lwip/tcpip.h"
mbed_official 0:51ac1d130fd4 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
mbed_official 0:51ac1d130fd4 54 #endif /* ENABLE_LOOPBACK */
mbed_official 0:51ac1d130fd4 55
mbed_official 0:51ac1d130fd4 56 #if LWIP_AUTOIP
mbed_official 0:51ac1d130fd4 57 #include "lwip/autoip.h"
mbed_official 0:51ac1d130fd4 58 #endif /* LWIP_AUTOIP */
mbed_official 0:51ac1d130fd4 59 #if LWIP_DHCP
mbed_official 0:51ac1d130fd4 60 #include "lwip/dhcp.h"
mbed_official 0:51ac1d130fd4 61 #endif /* LWIP_DHCP */
mbed_official 0:51ac1d130fd4 62
mbed_official 0:51ac1d130fd4 63 #if LWIP_NETIF_STATUS_CALLBACK
mbed_official 0:51ac1d130fd4 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
mbed_official 0:51ac1d130fd4 65 #else
mbed_official 0:51ac1d130fd4 66 #define NETIF_STATUS_CALLBACK(n)
mbed_official 0:51ac1d130fd4 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
mbed_official 0:51ac1d130fd4 68
mbed_official 0:51ac1d130fd4 69 #if LWIP_NETIF_LINK_CALLBACK
mbed_official 0:51ac1d130fd4 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
mbed_official 0:51ac1d130fd4 71 #else
mbed_official 0:51ac1d130fd4 72 #define NETIF_LINK_CALLBACK(n)
mbed_official 0:51ac1d130fd4 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
mbed_official 0:51ac1d130fd4 74
mbed_official 0:51ac1d130fd4 75 struct netif *netif_list;
mbed_official 0:51ac1d130fd4 76 struct netif *netif_default;
mbed_official 0:51ac1d130fd4 77
mbed_official 0:51ac1d130fd4 78 #if LWIP_HAVE_LOOPIF
mbed_official 0:51ac1d130fd4 79 static struct netif loop_netif;
mbed_official 0:51ac1d130fd4 80
mbed_official 0:51ac1d130fd4 81 /**
mbed_official 0:51ac1d130fd4 82 * Initialize a lwip network interface structure for a loopback interface
mbed_official 0:51ac1d130fd4 83 *
mbed_official 0:51ac1d130fd4 84 * @param netif the lwip network interface structure for this loopif
mbed_official 0:51ac1d130fd4 85 * @return ERR_OK if the loopif is initialized
mbed_official 0:51ac1d130fd4 86 * ERR_MEM if private data couldn't be allocated
mbed_official 0:51ac1d130fd4 87 */
mbed_official 0:51ac1d130fd4 88 static err_t
mbed_official 0:51ac1d130fd4 89 netif_loopif_init(struct netif *netif)
mbed_official 0:51ac1d130fd4 90 {
mbed_official 0:51ac1d130fd4 91 /* initialize the snmp variables and counters inside the struct netif
mbed_official 0:51ac1d130fd4 92 * ifSpeed: no assumption can be made!
mbed_official 0:51ac1d130fd4 93 */
mbed_official 0:51ac1d130fd4 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
mbed_official 0:51ac1d130fd4 95
mbed_official 0:51ac1d130fd4 96 netif->name[0] = 'l';
mbed_official 0:51ac1d130fd4 97 netif->name[1] = 'o';
mbed_official 0:51ac1d130fd4 98 netif->output = netif_loop_output;
mbed_official 0:51ac1d130fd4 99 return ERR_OK;
mbed_official 0:51ac1d130fd4 100 }
mbed_official 0:51ac1d130fd4 101 #endif /* LWIP_HAVE_LOOPIF */
mbed_official 0:51ac1d130fd4 102
mbed_official 0:51ac1d130fd4 103 void
mbed_official 0:51ac1d130fd4 104 netif_init(void)
mbed_official 0:51ac1d130fd4 105 {
mbed_official 0:51ac1d130fd4 106 #if LWIP_HAVE_LOOPIF
mbed_official 0:51ac1d130fd4 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
mbed_official 0:51ac1d130fd4 108 IP4_ADDR(&loop_gw, 127,0,0,1);
mbed_official 0:51ac1d130fd4 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
mbed_official 0:51ac1d130fd4 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
mbed_official 0:51ac1d130fd4 111
mbed_official 0:51ac1d130fd4 112 #if NO_SYS
mbed_official 0:51ac1d130fd4 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
mbed_official 0:51ac1d130fd4 114 #else /* NO_SYS */
mbed_official 0:51ac1d130fd4 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
mbed_official 0:51ac1d130fd4 116 #endif /* NO_SYS */
mbed_official 0:51ac1d130fd4 117 netif_set_up(&loop_netif);
mbed_official 0:51ac1d130fd4 118
mbed_official 0:51ac1d130fd4 119 #endif /* LWIP_HAVE_LOOPIF */
mbed_official 0:51ac1d130fd4 120 }
mbed_official 0:51ac1d130fd4 121
mbed_official 0:51ac1d130fd4 122 /**
mbed_official 0:51ac1d130fd4 123 * Add a network interface to the list of lwIP netifs.
mbed_official 0:51ac1d130fd4 124 *
mbed_official 0:51ac1d130fd4 125 * @param netif a pre-allocated netif structure
mbed_official 0:51ac1d130fd4 126 * @param ipaddr IP address for the new netif
mbed_official 0:51ac1d130fd4 127 * @param netmask network mask for the new netif
mbed_official 0:51ac1d130fd4 128 * @param gw default gateway IP address for the new netif
mbed_official 0:51ac1d130fd4 129 * @param state opaque data passed to the new netif
mbed_official 0:51ac1d130fd4 130 * @param init callback function that initializes the interface
mbed_official 0:51ac1d130fd4 131 * @param input callback function that is called to pass
mbed_official 0:51ac1d130fd4 132 * ingress packets up in the protocol layer stack.
mbed_official 0:51ac1d130fd4 133 *
mbed_official 0:51ac1d130fd4 134 * @return netif, or NULL if failed.
mbed_official 0:51ac1d130fd4 135 */
mbed_official 0:51ac1d130fd4 136 struct netif *
mbed_official 0:51ac1d130fd4 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
mbed_official 0:51ac1d130fd4 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
mbed_official 0:51ac1d130fd4 139 {
mbed_official 0:51ac1d130fd4 140 static u8_t netifnum = 0;
mbed_official 0:51ac1d130fd4 141
mbed_official 0:51ac1d130fd4 142 LWIP_ASSERT("No init function given", init != NULL);
mbed_official 0:51ac1d130fd4 143
mbed_official 0:51ac1d130fd4 144 /* reset new interface configuration state */
mbed_official 0:51ac1d130fd4 145 ip_addr_set_zero(&netif->ip_addr);
mbed_official 0:51ac1d130fd4 146 ip_addr_set_zero(&netif->netmask);
mbed_official 0:51ac1d130fd4 147 ip_addr_set_zero(&netif->gw);
mbed_official 0:51ac1d130fd4 148 netif->flags = 0;
mbed_official 0:51ac1d130fd4 149 #if LWIP_DHCP
mbed_official 0:51ac1d130fd4 150 /* netif not under DHCP control by default */
mbed_official 0:51ac1d130fd4 151 netif->dhcp = NULL;
mbed_official 0:51ac1d130fd4 152 #endif /* LWIP_DHCP */
mbed_official 0:51ac1d130fd4 153 #if LWIP_AUTOIP
mbed_official 0:51ac1d130fd4 154 /* netif not under AutoIP control by default */
mbed_official 0:51ac1d130fd4 155 netif->autoip = NULL;
mbed_official 0:51ac1d130fd4 156 #endif /* LWIP_AUTOIP */
mbed_official 0:51ac1d130fd4 157 #if LWIP_NETIF_STATUS_CALLBACK
mbed_official 0:51ac1d130fd4 158 netif->status_callback = NULL;
mbed_official 0:51ac1d130fd4 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
mbed_official 0:51ac1d130fd4 160 #if LWIP_NETIF_LINK_CALLBACK
mbed_official 0:51ac1d130fd4 161 netif->link_callback = NULL;
mbed_official 0:51ac1d130fd4 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
mbed_official 0:51ac1d130fd4 163 #if LWIP_IGMP
mbed_official 0:51ac1d130fd4 164 netif->igmp_mac_filter = NULL;
mbed_official 0:51ac1d130fd4 165 #endif /* LWIP_IGMP */
mbed_official 0:51ac1d130fd4 166 #if ENABLE_LOOPBACK
mbed_official 0:51ac1d130fd4 167 netif->loop_first = NULL;
mbed_official 0:51ac1d130fd4 168 netif->loop_last = NULL;
mbed_official 0:51ac1d130fd4 169 #endif /* ENABLE_LOOPBACK */
mbed_official 0:51ac1d130fd4 170
mbed_official 0:51ac1d130fd4 171 /* remember netif specific state information data */
mbed_official 0:51ac1d130fd4 172 netif->state = state;
mbed_official 0:51ac1d130fd4 173 netif->num = netifnum++;
mbed_official 0:51ac1d130fd4 174 netif->input = input;
mbed_official 0:51ac1d130fd4 175 #if LWIP_NETIF_HWADDRHINT
mbed_official 0:51ac1d130fd4 176 netif->addr_hint = NULL;
mbed_official 0:51ac1d130fd4 177 #endif /* LWIP_NETIF_HWADDRHINT*/
mbed_official 0:51ac1d130fd4 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
mbed_official 0:51ac1d130fd4 179 netif->loop_cnt_current = 0;
mbed_official 0:51ac1d130fd4 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
mbed_official 0:51ac1d130fd4 181
mbed_official 0:51ac1d130fd4 182 netif_set_addr(netif, ipaddr, netmask, gw);
mbed_official 0:51ac1d130fd4 183
mbed_official 0:51ac1d130fd4 184 /* call user specified initialization function for netif */
mbed_official 0:51ac1d130fd4 185 if (init(netif) != ERR_OK) {
mbed_official 0:51ac1d130fd4 186 return NULL;
mbed_official 0:51ac1d130fd4 187 }
mbed_official 0:51ac1d130fd4 188
mbed_official 0:51ac1d130fd4 189 /* add this netif to the list */
mbed_official 0:51ac1d130fd4 190 netif->next = netif_list;
mbed_official 0:51ac1d130fd4 191 netif_list = netif;
mbed_official 0:51ac1d130fd4 192 snmp_inc_iflist();
mbed_official 0:51ac1d130fd4 193
mbed_official 0:51ac1d130fd4 194 #if LWIP_IGMP
mbed_official 0:51ac1d130fd4 195 /* start IGMP processing */
mbed_official 0:51ac1d130fd4 196 if (netif->flags & NETIF_FLAG_IGMP) {
mbed_official 0:51ac1d130fd4 197 igmp_start(netif);
mbed_official 0:51ac1d130fd4 198 }
mbed_official 0:51ac1d130fd4 199 #endif /* LWIP_IGMP */
mbed_official 0:51ac1d130fd4 200
mbed_official 0:51ac1d130fd4 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
mbed_official 0:51ac1d130fd4 202 netif->name[0], netif->name[1]));
mbed_official 0:51ac1d130fd4 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
mbed_official 0:51ac1d130fd4 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
mbed_official 0:51ac1d130fd4 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
mbed_official 0:51ac1d130fd4 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
mbed_official 0:51ac1d130fd4 207 ip_addr_debug_print(NETIF_DEBUG, gw);
mbed_official 0:51ac1d130fd4 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
mbed_official 0:51ac1d130fd4 209 return netif;
mbed_official 0:51ac1d130fd4 210 }
mbed_official 0:51ac1d130fd4 211
mbed_official 0:51ac1d130fd4 212 /**
mbed_official 0:51ac1d130fd4 213 * Change IP address configuration for a network interface (including netmask
mbed_official 0:51ac1d130fd4 214 * and default gateway).
mbed_official 0:51ac1d130fd4 215 *
mbed_official 0:51ac1d130fd4 216 * @param netif the network interface to change
mbed_official 0:51ac1d130fd4 217 * @param ipaddr the new IP address
mbed_official 0:51ac1d130fd4 218 * @param netmask the new netmask
mbed_official 0:51ac1d130fd4 219 * @param gw the new default gateway
mbed_official 0:51ac1d130fd4 220 */
mbed_official 0:51ac1d130fd4 221 void
mbed_official 0:51ac1d130fd4 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
mbed_official 0:51ac1d130fd4 223 ip_addr_t *gw)
mbed_official 0:51ac1d130fd4 224 {
mbed_official 0:51ac1d130fd4 225 netif_set_ipaddr(netif, ipaddr);
mbed_official 0:51ac1d130fd4 226 netif_set_netmask(netif, netmask);
mbed_official 0:51ac1d130fd4 227 netif_set_gw(netif, gw);
mbed_official 0:51ac1d130fd4 228 }
mbed_official 0:51ac1d130fd4 229
mbed_official 0:51ac1d130fd4 230 /**
mbed_official 0:51ac1d130fd4 231 * Remove a network interface from the list of lwIP netifs.
mbed_official 0:51ac1d130fd4 232 *
mbed_official 0:51ac1d130fd4 233 * @param netif the network interface to remove
mbed_official 0:51ac1d130fd4 234 */
mbed_official 0:51ac1d130fd4 235 void
mbed_official 0:51ac1d130fd4 236 netif_remove(struct netif *netif)
mbed_official 0:51ac1d130fd4 237 {
mbed_official 0:51ac1d130fd4 238 if (netif == NULL) {
mbed_official 0:51ac1d130fd4 239 return;
mbed_official 0:51ac1d130fd4 240 }
mbed_official 0:51ac1d130fd4 241
mbed_official 0:51ac1d130fd4 242 #if LWIP_IGMP
mbed_official 0:51ac1d130fd4 243 /* stop IGMP processing */
mbed_official 0:51ac1d130fd4 244 if (netif->flags & NETIF_FLAG_IGMP) {
mbed_official 0:51ac1d130fd4 245 igmp_stop(netif);
mbed_official 0:51ac1d130fd4 246 }
mbed_official 0:51ac1d130fd4 247 #endif /* LWIP_IGMP */
mbed_official 0:51ac1d130fd4 248 if (netif_is_up(netif)) {
mbed_official 0:51ac1d130fd4 249 /* set netif down before removing (call callback function) */
mbed_official 0:51ac1d130fd4 250 netif_set_down(netif);
mbed_official 0:51ac1d130fd4 251 }
mbed_official 0:51ac1d130fd4 252
mbed_official 0:51ac1d130fd4 253 snmp_delete_ipaddridx_tree(netif);
mbed_official 0:51ac1d130fd4 254
mbed_official 0:51ac1d130fd4 255 /* is it the first netif? */
mbed_official 0:51ac1d130fd4 256 if (netif_list == netif) {
mbed_official 0:51ac1d130fd4 257 netif_list = netif->next;
mbed_official 0:51ac1d130fd4 258 } else {
mbed_official 0:51ac1d130fd4 259 /* look for netif further down the list */
mbed_official 0:51ac1d130fd4 260 struct netif * tmpNetif;
mbed_official 0:51ac1d130fd4 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
mbed_official 0:51ac1d130fd4 262 if (tmpNetif->next == netif) {
mbed_official 0:51ac1d130fd4 263 tmpNetif->next = netif->next;
mbed_official 0:51ac1d130fd4 264 break;
mbed_official 0:51ac1d130fd4 265 }
mbed_official 0:51ac1d130fd4 266 }
mbed_official 0:51ac1d130fd4 267 if (tmpNetif == NULL)
mbed_official 0:51ac1d130fd4 268 return; /* we didn't find any netif today */
mbed_official 0:51ac1d130fd4 269 }
mbed_official 0:51ac1d130fd4 270 snmp_dec_iflist();
mbed_official 0:51ac1d130fd4 271 /* this netif is default? */
mbed_official 0:51ac1d130fd4 272 if (netif_default == netif) {
mbed_official 0:51ac1d130fd4 273 /* reset default netif */
mbed_official 0:51ac1d130fd4 274 netif_set_default(NULL);
mbed_official 0:51ac1d130fd4 275 }
mbed_official 0:51ac1d130fd4 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
mbed_official 0:51ac1d130fd4 277 }
mbed_official 0:51ac1d130fd4 278
mbed_official 0:51ac1d130fd4 279 /**
mbed_official 0:51ac1d130fd4 280 * Find a network interface by searching for its name
mbed_official 0:51ac1d130fd4 281 *
mbed_official 0:51ac1d130fd4 282 * @param name the name of the netif (like netif->name) plus concatenated number
mbed_official 0:51ac1d130fd4 283 * in ascii representation (e.g. 'en0')
mbed_official 0:51ac1d130fd4 284 */
mbed_official 0:51ac1d130fd4 285 struct netif *
mbed_official 0:51ac1d130fd4 286 netif_find(char *name)
mbed_official 0:51ac1d130fd4 287 {
mbed_official 0:51ac1d130fd4 288 struct netif *netif;
mbed_official 0:51ac1d130fd4 289 u8_t num;
mbed_official 0:51ac1d130fd4 290
mbed_official 0:51ac1d130fd4 291 if (name == NULL) {
mbed_official 0:51ac1d130fd4 292 return NULL;
mbed_official 0:51ac1d130fd4 293 }
mbed_official 0:51ac1d130fd4 294
mbed_official 0:51ac1d130fd4 295 num = name[2] - '0';
mbed_official 0:51ac1d130fd4 296
mbed_official 0:51ac1d130fd4 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
mbed_official 0:51ac1d130fd4 298 if (num == netif->num &&
mbed_official 0:51ac1d130fd4 299 name[0] == netif->name[0] &&
mbed_official 0:51ac1d130fd4 300 name[1] == netif->name[1]) {
mbed_official 0:51ac1d130fd4 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
mbed_official 0:51ac1d130fd4 302 return netif;
mbed_official 0:51ac1d130fd4 303 }
mbed_official 0:51ac1d130fd4 304 }
mbed_official 0:51ac1d130fd4 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
mbed_official 0:51ac1d130fd4 306 return NULL;
mbed_official 0:51ac1d130fd4 307 }
mbed_official 0:51ac1d130fd4 308
mbed_official 0:51ac1d130fd4 309 /**
mbed_official 0:51ac1d130fd4 310 * Change the IP address of a network interface
mbed_official 0:51ac1d130fd4 311 *
mbed_official 0:51ac1d130fd4 312 * @param netif the network interface to change
mbed_official 0:51ac1d130fd4 313 * @param ipaddr the new IP address
mbed_official 0:51ac1d130fd4 314 *
mbed_official 0:51ac1d130fd4 315 * @note call netif_set_addr() if you also want to change netmask and
mbed_official 0:51ac1d130fd4 316 * default gateway
mbed_official 0:51ac1d130fd4 317 */
mbed_official 0:51ac1d130fd4 318 void
mbed_official 0:51ac1d130fd4 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
mbed_official 0:51ac1d130fd4 320 {
mbed_official 0:51ac1d130fd4 321 /* TODO: Handling of obsolete pcbs */
mbed_official 0:51ac1d130fd4 322 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
mbed_official 0:51ac1d130fd4 323 #if LWIP_TCP
mbed_official 0:51ac1d130fd4 324 struct tcp_pcb *pcb;
mbed_official 0:51ac1d130fd4 325 struct tcp_pcb_listen *lpcb;
mbed_official 0:51ac1d130fd4 326
mbed_official 0:51ac1d130fd4 327 /* address is actually being changed? */
mbed_official 0:51ac1d130fd4 328 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
mbed_official 0:51ac1d130fd4 329 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
mbed_official 0:51ac1d130fd4 330 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
mbed_official 0:51ac1d130fd4 331 pcb = tcp_active_pcbs;
mbed_official 0:51ac1d130fd4 332 while (pcb != NULL) {
mbed_official 0:51ac1d130fd4 333 /* PCB bound to current local interface address? */
mbed_official 0:51ac1d130fd4 334 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
mbed_official 0:51ac1d130fd4 335 #if LWIP_AUTOIP
mbed_official 0:51ac1d130fd4 336 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
mbed_official 0:51ac1d130fd4 337 && !ip_addr_islinklocal(&(pcb->local_ip))
mbed_official 0:51ac1d130fd4 338 #endif /* LWIP_AUTOIP */
mbed_official 0:51ac1d130fd4 339 ) {
mbed_official 0:51ac1d130fd4 340 /* this connection must be aborted */
mbed_official 0:51ac1d130fd4 341 struct tcp_pcb *next = pcb->next;
mbed_official 0:51ac1d130fd4 342 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
mbed_official 0:51ac1d130fd4 343 tcp_abort(pcb);
mbed_official 0:51ac1d130fd4 344 pcb = next;
mbed_official 0:51ac1d130fd4 345 } else {
mbed_official 0:51ac1d130fd4 346 pcb = pcb->next;
mbed_official 0:51ac1d130fd4 347 }
mbed_official 0:51ac1d130fd4 348 }
mbed_official 0:51ac1d130fd4 349 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
mbed_official 0:51ac1d130fd4 350 /* PCB bound to current local interface address? */
mbed_official 0:51ac1d130fd4 351 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
mbed_official 0:51ac1d130fd4 352 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
mbed_official 0:51ac1d130fd4 353 /* The PCB is listening to the old ipaddr and
mbed_official 0:51ac1d130fd4 354 * is set to listen to the new one instead */
mbed_official 0:51ac1d130fd4 355 ip_addr_set(&(lpcb->local_ip), ipaddr);
mbed_official 0:51ac1d130fd4 356 }
mbed_official 0:51ac1d130fd4 357 }
mbed_official 0:51ac1d130fd4 358 }
mbed_official 0:51ac1d130fd4 359 #endif
mbed_official 0:51ac1d130fd4 360 snmp_delete_ipaddridx_tree(netif);
mbed_official 0:51ac1d130fd4 361 snmp_delete_iprteidx_tree(0,netif);
mbed_official 0:51ac1d130fd4 362 /* set new IP address to netif */
mbed_official 0:51ac1d130fd4 363 ip_addr_set(&(netif->ip_addr), ipaddr);
mbed_official 0:51ac1d130fd4 364 snmp_insert_ipaddridx_tree(netif);
mbed_official 0:51ac1d130fd4 365 snmp_insert_iprteidx_tree(0,netif);
mbed_official 0:51ac1d130fd4 366
mbed_official 0:51ac1d130fd4 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",
mbed_official 0:51ac1d130fd4 368 netif->name[0], netif->name[1],
mbed_official 0:51ac1d130fd4 369 ip4_addr1_16(&netif->ip_addr),
mbed_official 0:51ac1d130fd4 370 ip4_addr2_16(&netif->ip_addr),
mbed_official 0:51ac1d130fd4 371 ip4_addr3_16(&netif->ip_addr),
mbed_official 0:51ac1d130fd4 372 ip4_addr4_16(&netif->ip_addr)));
mbed_official 0:51ac1d130fd4 373 }
mbed_official 0:51ac1d130fd4 374
mbed_official 0:51ac1d130fd4 375 /**
mbed_official 0:51ac1d130fd4 376 * Change the default gateway for a network interface
mbed_official 0:51ac1d130fd4 377 *
mbed_official 0:51ac1d130fd4 378 * @param netif the network interface to change
mbed_official 0:51ac1d130fd4 379 * @param gw the new default gateway
mbed_official 0:51ac1d130fd4 380 *
mbed_official 0:51ac1d130fd4 381 * @note call netif_set_addr() if you also want to change ip address and netmask
mbed_official 0:51ac1d130fd4 382 */
mbed_official 0:51ac1d130fd4 383 void
mbed_official 0:51ac1d130fd4 384 netif_set_gw(struct netif *netif, ip_addr_t *gw)
mbed_official 0:51ac1d130fd4 385 {
mbed_official 0:51ac1d130fd4 386 ip_addr_set(&(netif->gw), gw);
mbed_official 0:51ac1d130fd4 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",
mbed_official 0:51ac1d130fd4 388 netif->name[0], netif->name[1],
mbed_official 0:51ac1d130fd4 389 ip4_addr1_16(&netif->gw),
mbed_official 0:51ac1d130fd4 390 ip4_addr2_16(&netif->gw),
mbed_official 0:51ac1d130fd4 391 ip4_addr3_16(&netif->gw),
mbed_official 0:51ac1d130fd4 392 ip4_addr4_16(&netif->gw)));
mbed_official 0:51ac1d130fd4 393 }
mbed_official 0:51ac1d130fd4 394
mbed_official 0:51ac1d130fd4 395 /**
mbed_official 0:51ac1d130fd4 396 * Change the netmask of a network interface
mbed_official 0:51ac1d130fd4 397 *
mbed_official 0:51ac1d130fd4 398 * @param netif the network interface to change
mbed_official 0:51ac1d130fd4 399 * @param netmask the new netmask
mbed_official 0:51ac1d130fd4 400 *
mbed_official 0:51ac1d130fd4 401 * @note call netif_set_addr() if you also want to change ip address and
mbed_official 0:51ac1d130fd4 402 * default gateway
mbed_official 0:51ac1d130fd4 403 */
mbed_official 0:51ac1d130fd4 404 void
mbed_official 0:51ac1d130fd4 405 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
mbed_official 0:51ac1d130fd4 406 {
mbed_official 0:51ac1d130fd4 407 snmp_delete_iprteidx_tree(0, netif);
mbed_official 0:51ac1d130fd4 408 /* set new netmask to netif */
mbed_official 0:51ac1d130fd4 409 ip_addr_set(&(netif->netmask), netmask);
mbed_official 0:51ac1d130fd4 410 snmp_insert_iprteidx_tree(0, netif);
mbed_official 0:51ac1d130fd4 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",
mbed_official 0:51ac1d130fd4 412 netif->name[0], netif->name[1],
mbed_official 0:51ac1d130fd4 413 ip4_addr1_16(&netif->netmask),
mbed_official 0:51ac1d130fd4 414 ip4_addr2_16(&netif->netmask),
mbed_official 0:51ac1d130fd4 415 ip4_addr3_16(&netif->netmask),
mbed_official 0:51ac1d130fd4 416 ip4_addr4_16(&netif->netmask)));
mbed_official 0:51ac1d130fd4 417 }
mbed_official 0:51ac1d130fd4 418
mbed_official 0:51ac1d130fd4 419 /**
mbed_official 0:51ac1d130fd4 420 * Set a network interface as the default network interface
mbed_official 0:51ac1d130fd4 421 * (used to output all packets for which no specific route is found)
mbed_official 0:51ac1d130fd4 422 *
mbed_official 0:51ac1d130fd4 423 * @param netif the default network interface
mbed_official 0:51ac1d130fd4 424 */
mbed_official 0:51ac1d130fd4 425 void
mbed_official 0:51ac1d130fd4 426 netif_set_default(struct netif *netif)
mbed_official 0:51ac1d130fd4 427 {
mbed_official 0:51ac1d130fd4 428 if (netif == NULL) {
mbed_official 0:51ac1d130fd4 429 /* remove default route */
mbed_official 0:51ac1d130fd4 430 snmp_delete_iprteidx_tree(1, netif);
mbed_official 0:51ac1d130fd4 431 } else {
mbed_official 0:51ac1d130fd4 432 /* install default route */
mbed_official 0:51ac1d130fd4 433 snmp_insert_iprteidx_tree(1, netif);
mbed_official 0:51ac1d130fd4 434 }
mbed_official 0:51ac1d130fd4 435 netif_default = netif;
mbed_official 0:51ac1d130fd4 436 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
mbed_official 0:51ac1d130fd4 437 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
mbed_official 0:51ac1d130fd4 438 }
mbed_official 0:51ac1d130fd4 439
mbed_official 0:51ac1d130fd4 440 /**
mbed_official 0:51ac1d130fd4 441 * Bring an interface up, available for processing
mbed_official 0:51ac1d130fd4 442 * traffic.
mbed_official 0:51ac1d130fd4 443 *
mbed_official 0:51ac1d130fd4 444 * @note: Enabling DHCP on a down interface will make it come
mbed_official 0:51ac1d130fd4 445 * up once configured.
mbed_official 0:51ac1d130fd4 446 *
mbed_official 0:51ac1d130fd4 447 * @see dhcp_start()
mbed_official 0:51ac1d130fd4 448 */
mbed_official 0:51ac1d130fd4 449 void netif_set_up(struct netif *netif)
mbed_official 0:51ac1d130fd4 450 {
mbed_official 0:51ac1d130fd4 451 if (!(netif->flags & NETIF_FLAG_UP)) {
mbed_official 0:51ac1d130fd4 452 netif->flags |= NETIF_FLAG_UP;
mbed_official 0:51ac1d130fd4 453
mbed_official 0:51ac1d130fd4 454 #if LWIP_SNMP
mbed_official 0:51ac1d130fd4 455 snmp_get_sysuptime(&netif->ts);
mbed_official 0:51ac1d130fd4 456 #endif /* LWIP_SNMP */
mbed_official 0:51ac1d130fd4 457
mbed_official 0:51ac1d130fd4 458 NETIF_STATUS_CALLBACK(netif);
mbed_official 0:51ac1d130fd4 459
mbed_official 0:51ac1d130fd4 460 if (netif->flags & NETIF_FLAG_LINK_UP) {
mbed_official 0:51ac1d130fd4 461 #if LWIP_ARP
mbed_official 0:51ac1d130fd4 462 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
mbed_official 0:51ac1d130fd4 463 if (netif->flags & (NETIF_FLAG_ETHARP)) {
mbed_official 0:51ac1d130fd4 464 etharp_gratuitous(netif);
mbed_official 0:51ac1d130fd4 465 }
mbed_official 0:51ac1d130fd4 466 #endif /* LWIP_ARP */
mbed_official 0:51ac1d130fd4 467
mbed_official 0:51ac1d130fd4 468 #if LWIP_IGMP
mbed_official 0:51ac1d130fd4 469 /* resend IGMP memberships */
mbed_official 0:51ac1d130fd4 470 if (netif->flags & NETIF_FLAG_IGMP) {
mbed_official 0:51ac1d130fd4 471 igmp_report_groups( netif);
mbed_official 0:51ac1d130fd4 472 }
mbed_official 0:51ac1d130fd4 473 #endif /* LWIP_IGMP */
mbed_official 0:51ac1d130fd4 474 }
mbed_official 0:51ac1d130fd4 475 }
mbed_official 0:51ac1d130fd4 476 }
mbed_official 0:51ac1d130fd4 477
mbed_official 0:51ac1d130fd4 478 /**
mbed_official 0:51ac1d130fd4 479 * Bring an interface down, disabling any traffic processing.
mbed_official 0:51ac1d130fd4 480 *
mbed_official 0:51ac1d130fd4 481 * @note: Enabling DHCP on a down interface will make it come
mbed_official 0:51ac1d130fd4 482 * up once configured.
mbed_official 0:51ac1d130fd4 483 *
mbed_official 0:51ac1d130fd4 484 * @see dhcp_start()
mbed_official 0:51ac1d130fd4 485 */
mbed_official 0:51ac1d130fd4 486 void netif_set_down(struct netif *netif)
mbed_official 0:51ac1d130fd4 487 {
mbed_official 0:51ac1d130fd4 488 if (netif->flags & NETIF_FLAG_UP) {
mbed_official 0:51ac1d130fd4 489 netif->flags &= ~NETIF_FLAG_UP;
mbed_official 0:51ac1d130fd4 490 #if LWIP_SNMP
mbed_official 0:51ac1d130fd4 491 snmp_get_sysuptime(&netif->ts);
mbed_official 0:51ac1d130fd4 492 #endif
mbed_official 0:51ac1d130fd4 493
mbed_official 0:51ac1d130fd4 494 NETIF_STATUS_CALLBACK(netif);
mbed_official 0:51ac1d130fd4 495 }
mbed_official 0:51ac1d130fd4 496 }
mbed_official 0:51ac1d130fd4 497
mbed_official 0:51ac1d130fd4 498 #if LWIP_NETIF_STATUS_CALLBACK
mbed_official 0:51ac1d130fd4 499 /**
mbed_official 0:51ac1d130fd4 500 * Set callback to be called when interface is brought up/down
mbed_official 0:51ac1d130fd4 501 */
mbed_official 0:51ac1d130fd4 502 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
mbed_official 0:51ac1d130fd4 503 {
mbed_official 0:51ac1d130fd4 504 if (netif) {
mbed_official 0:51ac1d130fd4 505 netif->status_callback = status_callback;
mbed_official 0:51ac1d130fd4 506 }
mbed_official 0:51ac1d130fd4 507 }
mbed_official 0:51ac1d130fd4 508 #endif /* LWIP_NETIF_STATUS_CALLBACK */
mbed_official 0:51ac1d130fd4 509
mbed_official 0:51ac1d130fd4 510 /**
mbed_official 0:51ac1d130fd4 511 * Called by a driver when its link goes up
mbed_official 0:51ac1d130fd4 512 */
mbed_official 0:51ac1d130fd4 513 void netif_set_link_up(struct netif *netif )
mbed_official 0:51ac1d130fd4 514 {
mbed_official 0:51ac1d130fd4 515 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
mbed_official 0:51ac1d130fd4 516 netif->flags |= NETIF_FLAG_LINK_UP;
mbed_official 0:51ac1d130fd4 517
mbed_official 0:51ac1d130fd4 518 #if LWIP_DHCP
mbed_official 0:51ac1d130fd4 519 if (netif->dhcp) {
mbed_official 0:51ac1d130fd4 520 dhcp_network_changed(netif);
mbed_official 0:51ac1d130fd4 521 }
mbed_official 0:51ac1d130fd4 522 #endif /* LWIP_DHCP */
mbed_official 0:51ac1d130fd4 523
mbed_official 0:51ac1d130fd4 524 #if LWIP_AUTOIP
mbed_official 0:51ac1d130fd4 525 if (netif->autoip) {
mbed_official 0:51ac1d130fd4 526 autoip_network_changed(netif);
mbed_official 0:51ac1d130fd4 527 }
mbed_official 0:51ac1d130fd4 528 #endif /* LWIP_AUTOIP */
mbed_official 0:51ac1d130fd4 529
mbed_official 0:51ac1d130fd4 530 if (netif->flags & NETIF_FLAG_UP) {
mbed_official 0:51ac1d130fd4 531 #if LWIP_ARP
mbed_official 0:51ac1d130fd4 532 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
mbed_official 0:51ac1d130fd4 533 if (netif->flags & NETIF_FLAG_ETHARP) {
mbed_official 0:51ac1d130fd4 534 etharp_gratuitous(netif);
mbed_official 0:51ac1d130fd4 535 }
mbed_official 0:51ac1d130fd4 536 #endif /* LWIP_ARP */
mbed_official 0:51ac1d130fd4 537
mbed_official 0:51ac1d130fd4 538 #if LWIP_IGMP
mbed_official 0:51ac1d130fd4 539 /* resend IGMP memberships */
mbed_official 0:51ac1d130fd4 540 if (netif->flags & NETIF_FLAG_IGMP) {
mbed_official 0:51ac1d130fd4 541 igmp_report_groups( netif);
mbed_official 0:51ac1d130fd4 542 }
mbed_official 0:51ac1d130fd4 543 #endif /* LWIP_IGMP */
mbed_official 0:51ac1d130fd4 544 }
mbed_official 0:51ac1d130fd4 545 NETIF_LINK_CALLBACK(netif);
mbed_official 0:51ac1d130fd4 546 }
mbed_official 0:51ac1d130fd4 547 }
mbed_official 0:51ac1d130fd4 548
mbed_official 0:51ac1d130fd4 549 /**
mbed_official 0:51ac1d130fd4 550 * Called by a driver when its link goes down
mbed_official 0:51ac1d130fd4 551 */
mbed_official 0:51ac1d130fd4 552 void netif_set_link_down(struct netif *netif )
mbed_official 0:51ac1d130fd4 553 {
mbed_official 0:51ac1d130fd4 554 if (netif->flags & NETIF_FLAG_LINK_UP) {
mbed_official 0:51ac1d130fd4 555 netif->flags &= ~NETIF_FLAG_LINK_UP;
mbed_official 0:51ac1d130fd4 556 NETIF_LINK_CALLBACK(netif);
mbed_official 0:51ac1d130fd4 557 }
mbed_official 0:51ac1d130fd4 558 }
mbed_official 0:51ac1d130fd4 559
mbed_official 0:51ac1d130fd4 560 #if LWIP_NETIF_LINK_CALLBACK
mbed_official 0:51ac1d130fd4 561 /**
mbed_official 0:51ac1d130fd4 562 * Set callback to be called when link is brought up/down
mbed_official 0:51ac1d130fd4 563 */
mbed_official 0:51ac1d130fd4 564 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
mbed_official 0:51ac1d130fd4 565 {
mbed_official 0:51ac1d130fd4 566 if (netif) {
mbed_official 0:51ac1d130fd4 567 netif->link_callback = link_callback;
mbed_official 0:51ac1d130fd4 568 }
mbed_official 0:51ac1d130fd4 569 }
mbed_official 0:51ac1d130fd4 570 #endif /* LWIP_NETIF_LINK_CALLBACK */
mbed_official 0:51ac1d130fd4 571
mbed_official 0:51ac1d130fd4 572 #if ENABLE_LOOPBACK
mbed_official 0:51ac1d130fd4 573 /**
mbed_official 0:51ac1d130fd4 574 * Send an IP packet to be received on the same netif (loopif-like).
mbed_official 0:51ac1d130fd4 575 * The pbuf is simply copied and handed back to netif->input.
mbed_official 0:51ac1d130fd4 576 * In multithreaded mode, this is done directly since netif->input must put
mbed_official 0:51ac1d130fd4 577 * the packet on a queue.
mbed_official 0:51ac1d130fd4 578 * In callback mode, the packet is put on an internal queue and is fed to
mbed_official 0:51ac1d130fd4 579 * netif->input by netif_poll().
mbed_official 0:51ac1d130fd4 580 *
mbed_official 0:51ac1d130fd4 581 * @param netif the lwip network interface structure
mbed_official 0:51ac1d130fd4 582 * @param p the (IP) packet to 'send'
mbed_official 0:51ac1d130fd4 583 * @param ipaddr the ip address to send the packet to (not used)
mbed_official 0:51ac1d130fd4 584 * @return ERR_OK if the packet has been sent
mbed_official 0:51ac1d130fd4 585 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
mbed_official 0:51ac1d130fd4 586 */
mbed_official 0:51ac1d130fd4 587 err_t
mbed_official 0:51ac1d130fd4 588 netif_loop_output(struct netif *netif, struct pbuf *p,
mbed_official 0:51ac1d130fd4 589 ip_addr_t *ipaddr)
mbed_official 0:51ac1d130fd4 590 {
mbed_official 0:51ac1d130fd4 591 struct pbuf *r;
mbed_official 0:51ac1d130fd4 592 err_t err;
mbed_official 0:51ac1d130fd4 593 struct pbuf *last;
mbed_official 0:51ac1d130fd4 594 #if LWIP_LOOPBACK_MAX_PBUFS
mbed_official 0:51ac1d130fd4 595 u8_t clen = 0;
mbed_official 0:51ac1d130fd4 596 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
mbed_official 0:51ac1d130fd4 597 /* If we have a loopif, SNMP counters are adjusted for it,
mbed_official 0:51ac1d130fd4 598 * if not they are adjusted for 'netif'. */
mbed_official 0:51ac1d130fd4 599 #if LWIP_SNMP
mbed_official 0:51ac1d130fd4 600 #if LWIP_HAVE_LOOPIF
mbed_official 0:51ac1d130fd4 601 struct netif *stats_if = &loop_netif;
mbed_official 0:51ac1d130fd4 602 #else /* LWIP_HAVE_LOOPIF */
mbed_official 0:51ac1d130fd4 603 struct netif *stats_if = netif;
mbed_official 0:51ac1d130fd4 604 #endif /* LWIP_HAVE_LOOPIF */
mbed_official 0:51ac1d130fd4 605 #endif /* LWIP_SNMP */
mbed_official 0:51ac1d130fd4 606 SYS_ARCH_DECL_PROTECT(lev);
mbed_official 0:51ac1d130fd4 607 LWIP_UNUSED_ARG(ipaddr);
mbed_official 0:51ac1d130fd4 608
mbed_official 0:51ac1d130fd4 609 /* Allocate a new pbuf */
mbed_official 0:51ac1d130fd4 610 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
mbed_official 0:51ac1d130fd4 611 if (r == NULL) {
mbed_official 0:51ac1d130fd4 612 LINK_STATS_INC(link.memerr);
mbed_official 0:51ac1d130fd4 613 LINK_STATS_INC(link.drop);
mbed_official 0:51ac1d130fd4 614 snmp_inc_ifoutdiscards(stats_if);
mbed_official 0:51ac1d130fd4 615 return ERR_MEM;
mbed_official 0:51ac1d130fd4 616 }
mbed_official 0:51ac1d130fd4 617 #if LWIP_LOOPBACK_MAX_PBUFS
mbed_official 0:51ac1d130fd4 618 clen = pbuf_clen(r);
mbed_official 0:51ac1d130fd4 619 /* check for overflow or too many pbuf on queue */
mbed_official 0:51ac1d130fd4 620 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
mbed_official 0:51ac1d130fd4 621 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
mbed_official 0:51ac1d130fd4 622 pbuf_free(r);
mbed_official 0:51ac1d130fd4 623 LINK_STATS_INC(link.memerr);
mbed_official 0:51ac1d130fd4 624 LINK_STATS_INC(link.drop);
mbed_official 0:51ac1d130fd4 625 snmp_inc_ifoutdiscards(stats_if);
mbed_official 0:51ac1d130fd4 626 return ERR_MEM;
mbed_official 0:51ac1d130fd4 627 }
mbed_official 0:51ac1d130fd4 628 netif->loop_cnt_current += clen;
mbed_official 0:51ac1d130fd4 629 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
mbed_official 0:51ac1d130fd4 630
mbed_official 0:51ac1d130fd4 631 /* Copy the whole pbuf queue p into the single pbuf r */
mbed_official 0:51ac1d130fd4 632 if ((err = pbuf_copy(r, p)) != ERR_OK) {
mbed_official 0:51ac1d130fd4 633 pbuf_free(r);
mbed_official 0:51ac1d130fd4 634 LINK_STATS_INC(link.memerr);
mbed_official 0:51ac1d130fd4 635 LINK_STATS_INC(link.drop);
mbed_official 0:51ac1d130fd4 636 snmp_inc_ifoutdiscards(stats_if);
mbed_official 0:51ac1d130fd4 637 return err;
mbed_official 0:51ac1d130fd4 638 }
mbed_official 0:51ac1d130fd4 639
mbed_official 0:51ac1d130fd4 640 /* Put the packet on a linked list which gets emptied through calling
mbed_official 0:51ac1d130fd4 641 netif_poll(). */
mbed_official 0:51ac1d130fd4 642
mbed_official 0:51ac1d130fd4 643 /* let last point to the last pbuf in chain r */
mbed_official 0:51ac1d130fd4 644 for (last = r; last->next != NULL; last = last->next);
mbed_official 0:51ac1d130fd4 645
mbed_official 0:51ac1d130fd4 646 SYS_ARCH_PROTECT(lev);
mbed_official 0:51ac1d130fd4 647 if(netif->loop_first != NULL) {
mbed_official 0:51ac1d130fd4 648 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
mbed_official 0:51ac1d130fd4 649 netif->loop_last->next = r;
mbed_official 0:51ac1d130fd4 650 netif->loop_last = last;
mbed_official 0:51ac1d130fd4 651 } else {
mbed_official 0:51ac1d130fd4 652 netif->loop_first = r;
mbed_official 0:51ac1d130fd4 653 netif->loop_last = last;
mbed_official 0:51ac1d130fd4 654 }
mbed_official 0:51ac1d130fd4 655 SYS_ARCH_UNPROTECT(lev);
mbed_official 0:51ac1d130fd4 656
mbed_official 0:51ac1d130fd4 657 LINK_STATS_INC(link.xmit);
mbed_official 0:51ac1d130fd4 658 snmp_add_ifoutoctets(stats_if, p->tot_len);
mbed_official 0:51ac1d130fd4 659 snmp_inc_ifoutucastpkts(stats_if);
mbed_official 0:51ac1d130fd4 660
mbed_official 0:51ac1d130fd4 661 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
mbed_official 0:51ac1d130fd4 662 /* For multithreading environment, schedule a call to netif_poll */
mbed_official 0:51ac1d130fd4 663 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
mbed_official 0:51ac1d130fd4 664 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
mbed_official 0:51ac1d130fd4 665
mbed_official 0:51ac1d130fd4 666 return ERR_OK;
mbed_official 0:51ac1d130fd4 667 }
mbed_official 0:51ac1d130fd4 668
mbed_official 0:51ac1d130fd4 669 /**
mbed_official 0:51ac1d130fd4 670 * Call netif_poll() in the main loop of your application. This is to prevent
mbed_official 0:51ac1d130fd4 671 * reentering non-reentrant functions like tcp_input(). Packets passed to
mbed_official 0:51ac1d130fd4 672 * netif_loop_output() are put on a list that is passed to netif->input() by
mbed_official 0:51ac1d130fd4 673 * netif_poll().
mbed_official 0:51ac1d130fd4 674 */
mbed_official 0:51ac1d130fd4 675 void
mbed_official 0:51ac1d130fd4 676 netif_poll(struct netif *netif)
mbed_official 0:51ac1d130fd4 677 {
mbed_official 0:51ac1d130fd4 678 struct pbuf *in;
mbed_official 0:51ac1d130fd4 679 /* If we have a loopif, SNMP counters are adjusted for it,
mbed_official 0:51ac1d130fd4 680 * if not they are adjusted for 'netif'. */
mbed_official 0:51ac1d130fd4 681 #if LWIP_SNMP
mbed_official 0:51ac1d130fd4 682 #if LWIP_HAVE_LOOPIF
mbed_official 0:51ac1d130fd4 683 struct netif *stats_if = &loop_netif;
mbed_official 0:51ac1d130fd4 684 #else /* LWIP_HAVE_LOOPIF */
mbed_official 0:51ac1d130fd4 685 struct netif *stats_if = netif;
mbed_official 0:51ac1d130fd4 686 #endif /* LWIP_HAVE_LOOPIF */
mbed_official 0:51ac1d130fd4 687 #endif /* LWIP_SNMP */
mbed_official 0:51ac1d130fd4 688 SYS_ARCH_DECL_PROTECT(lev);
mbed_official 0:51ac1d130fd4 689
mbed_official 0:51ac1d130fd4 690 do {
mbed_official 0:51ac1d130fd4 691 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
mbed_official 0:51ac1d130fd4 692 SYS_ARCH_PROTECT(lev);
mbed_official 0:51ac1d130fd4 693 in = netif->loop_first;
mbed_official 0:51ac1d130fd4 694 if (in != NULL) {
mbed_official 0:51ac1d130fd4 695 struct pbuf *in_end = in;
mbed_official 0:51ac1d130fd4 696 #if LWIP_LOOPBACK_MAX_PBUFS
mbed_official 0:51ac1d130fd4 697 u8_t clen = pbuf_clen(in);
mbed_official 0:51ac1d130fd4 698 /* adjust the number of pbufs on queue */
mbed_official 0:51ac1d130fd4 699 LWIP_ASSERT("netif->loop_cnt_current underflow",
mbed_official 0:51ac1d130fd4 700 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
mbed_official 0:51ac1d130fd4 701 netif->loop_cnt_current -= clen;
mbed_official 0:51ac1d130fd4 702 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
mbed_official 0:51ac1d130fd4 703 while (in_end->len != in_end->tot_len) {
mbed_official 0:51ac1d130fd4 704 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
mbed_official 0:51ac1d130fd4 705 in_end = in_end->next;
mbed_official 0:51ac1d130fd4 706 }
mbed_official 0:51ac1d130fd4 707 /* 'in_end' now points to the last pbuf from 'in' */
mbed_official 0:51ac1d130fd4 708 if (in_end == netif->loop_last) {
mbed_official 0:51ac1d130fd4 709 /* this was the last pbuf in the list */
mbed_official 0:51ac1d130fd4 710 netif->loop_first = netif->loop_last = NULL;
mbed_official 0:51ac1d130fd4 711 } else {
mbed_official 0:51ac1d130fd4 712 /* pop the pbuf off the list */
mbed_official 0:51ac1d130fd4 713 netif->loop_first = in_end->next;
mbed_official 0:51ac1d130fd4 714 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
mbed_official 0:51ac1d130fd4 715 }
mbed_official 0:51ac1d130fd4 716 /* De-queue the pbuf from its successors on the 'loop_' list. */
mbed_official 0:51ac1d130fd4 717 in_end->next = NULL;
mbed_official 0:51ac1d130fd4 718 }
mbed_official 0:51ac1d130fd4 719 SYS_ARCH_UNPROTECT(lev);
mbed_official 0:51ac1d130fd4 720
mbed_official 0:51ac1d130fd4 721 if (in != NULL) {
mbed_official 0:51ac1d130fd4 722 LINK_STATS_INC(link.recv);
mbed_official 0:51ac1d130fd4 723 snmp_add_ifinoctets(stats_if, in->tot_len);
mbed_official 0:51ac1d130fd4 724 snmp_inc_ifinucastpkts(stats_if);
mbed_official 0:51ac1d130fd4 725 /* loopback packets are always IP packets! */
mbed_official 0:51ac1d130fd4 726 if (ip_input(in, netif) != ERR_OK) {
mbed_official 0:51ac1d130fd4 727 pbuf_free(in);
mbed_official 0:51ac1d130fd4 728 }
mbed_official 0:51ac1d130fd4 729 /* Don't reference the packet any more! */
mbed_official 0:51ac1d130fd4 730 in = NULL;
mbed_official 0:51ac1d130fd4 731 }
mbed_official 0:51ac1d130fd4 732 /* go on while there is a packet on the list */
mbed_official 0:51ac1d130fd4 733 } while (netif->loop_first != NULL);
mbed_official 0:51ac1d130fd4 734 }
mbed_official 0:51ac1d130fd4 735
mbed_official 0:51ac1d130fd4 736 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
mbed_official 0:51ac1d130fd4 737 /**
mbed_official 0:51ac1d130fd4 738 * Calls netif_poll() for every netif on the netif_list.
mbed_official 0:51ac1d130fd4 739 */
mbed_official 0:51ac1d130fd4 740 void
mbed_official 0:51ac1d130fd4 741 netif_poll_all(void)
mbed_official 0:51ac1d130fd4 742 {
mbed_official 0:51ac1d130fd4 743 struct netif *netif = netif_list;
mbed_official 0:51ac1d130fd4 744 /* loop through netifs */
mbed_official 0:51ac1d130fd4 745 while (netif != NULL) {
mbed_official 0:51ac1d130fd4 746 netif_poll(netif);
mbed_official 0:51ac1d130fd4 747 /* proceed to next network interface */
mbed_official 0:51ac1d130fd4 748 netif = netif->next;
mbed_official 0:51ac1d130fd4 749 }
mbed_official 0:51ac1d130fd4 750 }
mbed_official 0:51ac1d130fd4 751 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
mbed_official 0:51ac1d130fd4 752 #endif /* ENABLE_LOOPBACK */