孙 毅明 / Mbed 2 deprecated 123

创建mbed

Dependencies:   EthernetInterface SDFileSystem mbed-rtos mbed

EthernetInterface/lwip/core/netif.c@1:6465a3f5c58a, 2018-03-06 (annotated)

Committer:
sunyiming
Date:
Tue Mar 06 08:53:46 2018 +0000
Revision:
1:6465a3f5c58a
??OK

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sunyiming 1:6465a3f5c58a 1 /**
sunyiming 1:6465a3f5c58a 2 * @file
sunyiming 1:6465a3f5c58a 3 * lwIP network interface abstraction
sunyiming 1:6465a3f5c58a 4 *
sunyiming 1:6465a3f5c58a 5 */
sunyiming 1:6465a3f5c58a 6
sunyiming 1:6465a3f5c58a 7 /*
sunyiming 1:6465a3f5c58a 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
sunyiming 1:6465a3f5c58a 9 * All rights reserved.
sunyiming 1:6465a3f5c58a 10 *
sunyiming 1:6465a3f5c58a 11 * Redistribution and use in source and binary forms, with or without modification,
sunyiming 1:6465a3f5c58a 12 * are permitted provided that the following conditions are met:
sunyiming 1:6465a3f5c58a 13 *
sunyiming 1:6465a3f5c58a 14 * 1. Redistributions of source code must retain the above copyright notice,
sunyiming 1:6465a3f5c58a 15 * this list of conditions and the following disclaimer.
sunyiming 1:6465a3f5c58a 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
sunyiming 1:6465a3f5c58a 17 * this list of conditions and the following disclaimer in the documentation
sunyiming 1:6465a3f5c58a 18 * and/or other materials provided with the distribution.
sunyiming 1:6465a3f5c58a 19 * 3. The name of the author may not be used to endorse or promote products
sunyiming 1:6465a3f5c58a 20 * derived from this software without specific prior written permission.
sunyiming 1:6465a3f5c58a 21 *
sunyiming 1:6465a3f5c58a 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
sunyiming 1:6465a3f5c58a 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
sunyiming 1:6465a3f5c58a 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
sunyiming 1:6465a3f5c58a 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sunyiming 1:6465a3f5c58a 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
sunyiming 1:6465a3f5c58a 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
sunyiming 1:6465a3f5c58a 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
sunyiming 1:6465a3f5c58a 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sunyiming 1:6465a3f5c58a 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
sunyiming 1:6465a3f5c58a 31 * OF SUCH DAMAGE.
sunyiming 1:6465a3f5c58a 32 *
sunyiming 1:6465a3f5c58a 33 * This file is part of the lwIP TCP/IP stack.
sunyiming 1:6465a3f5c58a 34 *
sunyiming 1:6465a3f5c58a 35 * Author: Adam Dunkels <adam@sics.se>
sunyiming 1:6465a3f5c58a 36 *
sunyiming 1:6465a3f5c58a 37 */
sunyiming 1:6465a3f5c58a 38
sunyiming 1:6465a3f5c58a 39 #include "lwip/opt.h"
sunyiming 1:6465a3f5c58a 40
sunyiming 1:6465a3f5c58a 41 #include "lwip/def.h"
sunyiming 1:6465a3f5c58a 42 #include "lwip/ip_addr.h"
sunyiming 1:6465a3f5c58a 43 #include "lwip/netif.h"
sunyiming 1:6465a3f5c58a 44 #include "lwip/tcp_impl.h"
sunyiming 1:6465a3f5c58a 45 #include "lwip/snmp.h"
sunyiming 1:6465a3f5c58a 46 #include "lwip/igmp.h"
sunyiming 1:6465a3f5c58a 47 #include "netif/etharp.h"
sunyiming 1:6465a3f5c58a 48 #include "lwip/stats.h"
sunyiming 1:6465a3f5c58a 49 #if ENABLE_LOOPBACK
sunyiming 1:6465a3f5c58a 50 #include "lwip/sys.h"
sunyiming 1:6465a3f5c58a 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
sunyiming 1:6465a3f5c58a 52 #include "lwip/tcpip.h"
sunyiming 1:6465a3f5c58a 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
sunyiming 1:6465a3f5c58a 54 #endif /* ENABLE_LOOPBACK */
sunyiming 1:6465a3f5c58a 55
sunyiming 1:6465a3f5c58a 56 #if LWIP_AUTOIP
sunyiming 1:6465a3f5c58a 57 #include "lwip/autoip.h"
sunyiming 1:6465a3f5c58a 58 #endif /* LWIP_AUTOIP */
sunyiming 1:6465a3f5c58a 59 #if LWIP_DHCP
sunyiming 1:6465a3f5c58a 60 #include "lwip/dhcp.h"
sunyiming 1:6465a3f5c58a 61 #endif /* LWIP_DHCP */
sunyiming 1:6465a3f5c58a 62
sunyiming 1:6465a3f5c58a 63 #if LWIP_NETIF_STATUS_CALLBACK
sunyiming 1:6465a3f5c58a 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
sunyiming 1:6465a3f5c58a 65 #else
sunyiming 1:6465a3f5c58a 66 #define NETIF_STATUS_CALLBACK(n)
sunyiming 1:6465a3f5c58a 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
sunyiming 1:6465a3f5c58a 68
sunyiming 1:6465a3f5c58a 69 #if LWIP_NETIF_LINK_CALLBACK
sunyiming 1:6465a3f5c58a 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
sunyiming 1:6465a3f5c58a 71 #else
sunyiming 1:6465a3f5c58a 72 #define NETIF_LINK_CALLBACK(n)
sunyiming 1:6465a3f5c58a 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
sunyiming 1:6465a3f5c58a 74
sunyiming 1:6465a3f5c58a 75 struct netif *netif_list;
sunyiming 1:6465a3f5c58a 76 struct netif *netif_default;
sunyiming 1:6465a3f5c58a 77
sunyiming 1:6465a3f5c58a 78 #if LWIP_HAVE_LOOPIF
sunyiming 1:6465a3f5c58a 79 static struct netif loop_netif;
sunyiming 1:6465a3f5c58a 80
sunyiming 1:6465a3f5c58a 81 /**
sunyiming 1:6465a3f5c58a 82 * Initialize a lwip network interface structure for a loopback interface
sunyiming 1:6465a3f5c58a 83 *
sunyiming 1:6465a3f5c58a 84 * @param netif the lwip network interface structure for this loopif
sunyiming 1:6465a3f5c58a 85 * @return ERR_OK if the loopif is initialized
sunyiming 1:6465a3f5c58a 86 * ERR_MEM if private data couldn't be allocated
sunyiming 1:6465a3f5c58a 87 */
sunyiming 1:6465a3f5c58a 88 static err_t
sunyiming 1:6465a3f5c58a 89 netif_loopif_init(struct netif *netif)
sunyiming 1:6465a3f5c58a 90 {
sunyiming 1:6465a3f5c58a 91 /* initialize the snmp variables and counters inside the struct netif
sunyiming 1:6465a3f5c58a 92 * ifSpeed: no assumption can be made!
sunyiming 1:6465a3f5c58a 93 */
sunyiming 1:6465a3f5c58a 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
sunyiming 1:6465a3f5c58a 95
sunyiming 1:6465a3f5c58a 96 netif->name[0] = 'l';
sunyiming 1:6465a3f5c58a 97 netif->name[1] = 'o';
sunyiming 1:6465a3f5c58a 98 netif->output = netif_loop_output;
sunyiming 1:6465a3f5c58a 99 return ERR_OK;
sunyiming 1:6465a3f5c58a 100 }
sunyiming 1:6465a3f5c58a 101 #endif /* LWIP_HAVE_LOOPIF */
sunyiming 1:6465a3f5c58a 102
sunyiming 1:6465a3f5c58a 103 void
sunyiming 1:6465a3f5c58a 104 netif_init(void)
sunyiming 1:6465a3f5c58a 105 {
sunyiming 1:6465a3f5c58a 106 #if LWIP_HAVE_LOOPIF
sunyiming 1:6465a3f5c58a 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
sunyiming 1:6465a3f5c58a 108 IP4_ADDR(&loop_gw, 127,0,0,1);
sunyiming 1:6465a3f5c58a 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
sunyiming 1:6465a3f5c58a 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
sunyiming 1:6465a3f5c58a 111
sunyiming 1:6465a3f5c58a 112 #if NO_SYS
sunyiming 1:6465a3f5c58a 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
sunyiming 1:6465a3f5c58a 114 #else /* NO_SYS */
sunyiming 1:6465a3f5c58a 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
sunyiming 1:6465a3f5c58a 116 #endif /* NO_SYS */
sunyiming 1:6465a3f5c58a 117 netif_set_up(&loop_netif);
sunyiming 1:6465a3f5c58a 118
sunyiming 1:6465a3f5c58a 119 #endif /* LWIP_HAVE_LOOPIF */
sunyiming 1:6465a3f5c58a 120 }
sunyiming 1:6465a3f5c58a 121
sunyiming 1:6465a3f5c58a 122 /**
sunyiming 1:6465a3f5c58a 123 * Add a network interface to the list of lwIP netifs.
sunyiming 1:6465a3f5c58a 124 *
sunyiming 1:6465a3f5c58a 125 * @param netif a pre-allocated netif structure
sunyiming 1:6465a3f5c58a 126 * @param ipaddr IP address for the new netif
sunyiming 1:6465a3f5c58a 127 * @param netmask network mask for the new netif
sunyiming 1:6465a3f5c58a 128 * @param gw default gateway IP address for the new netif
sunyiming 1:6465a3f5c58a 129 * @param state opaque data passed to the new netif
sunyiming 1:6465a3f5c58a 130 * @param init callback function that initializes the interface
sunyiming 1:6465a3f5c58a 131 * @param input callback function that is called to pass
sunyiming 1:6465a3f5c58a 132 * ingress packets up in the protocol layer stack.
sunyiming 1:6465a3f5c58a 133 *
sunyiming 1:6465a3f5c58a 134 * @return netif, or NULL if failed.
sunyiming 1:6465a3f5c58a 135 */
sunyiming 1:6465a3f5c58a 136 struct netif *
sunyiming 1:6465a3f5c58a 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
sunyiming 1:6465a3f5c58a 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
sunyiming 1:6465a3f5c58a 139 {
sunyiming 1:6465a3f5c58a 140 static u8_t netifnum = 0;
sunyiming 1:6465a3f5c58a 141
sunyiming 1:6465a3f5c58a 142 LWIP_ASSERT("No init function given", init != NULL);
sunyiming 1:6465a3f5c58a 143
sunyiming 1:6465a3f5c58a 144 /* reset new interface configuration state */
sunyiming 1:6465a3f5c58a 145 ip_addr_set_zero(&netif->ip_addr);
sunyiming 1:6465a3f5c58a 146 ip_addr_set_zero(&netif->netmask);
sunyiming 1:6465a3f5c58a 147 ip_addr_set_zero(&netif->gw);
sunyiming 1:6465a3f5c58a 148 netif->flags = 0;
sunyiming 1:6465a3f5c58a 149 #if LWIP_DHCP
sunyiming 1:6465a3f5c58a 150 /* netif not under DHCP control by default */
sunyiming 1:6465a3f5c58a 151 netif->dhcp = NULL;
sunyiming 1:6465a3f5c58a 152 #endif /* LWIP_DHCP */
sunyiming 1:6465a3f5c58a 153 #if LWIP_AUTOIP
sunyiming 1:6465a3f5c58a 154 /* netif not under AutoIP control by default */
sunyiming 1:6465a3f5c58a 155 netif->autoip = NULL;
sunyiming 1:6465a3f5c58a 156 #endif /* LWIP_AUTOIP */
sunyiming 1:6465a3f5c58a 157 #if LWIP_NETIF_STATUS_CALLBACK
sunyiming 1:6465a3f5c58a 158 netif->status_callback = NULL;
sunyiming 1:6465a3f5c58a 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
sunyiming 1:6465a3f5c58a 160 #if LWIP_NETIF_LINK_CALLBACK
sunyiming 1:6465a3f5c58a 161 netif->link_callback = NULL;
sunyiming 1:6465a3f5c58a 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
sunyiming 1:6465a3f5c58a 163 #if LWIP_IGMP
sunyiming 1:6465a3f5c58a 164 netif->igmp_mac_filter = NULL;
sunyiming 1:6465a3f5c58a 165 #endif /* LWIP_IGMP */
sunyiming 1:6465a3f5c58a 166 #if ENABLE_LOOPBACK
sunyiming 1:6465a3f5c58a 167 netif->loop_first = NULL;
sunyiming 1:6465a3f5c58a 168 netif->loop_last = NULL;
sunyiming 1:6465a3f5c58a 169 #endif /* ENABLE_LOOPBACK */
sunyiming 1:6465a3f5c58a 170
sunyiming 1:6465a3f5c58a 171 /* remember netif specific state information data */
sunyiming 1:6465a3f5c58a 172 netif->state = state;
sunyiming 1:6465a3f5c58a 173 netif->num = netifnum++;
sunyiming 1:6465a3f5c58a 174 netif->input = input;
sunyiming 1:6465a3f5c58a 175 #if LWIP_NETIF_HWADDRHINT
sunyiming 1:6465a3f5c58a 176 netif->addr_hint = NULL;
sunyiming 1:6465a3f5c58a 177 #endif /* LWIP_NETIF_HWADDRHINT*/
sunyiming 1:6465a3f5c58a 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
sunyiming 1:6465a3f5c58a 179 netif->loop_cnt_current = 0;
sunyiming 1:6465a3f5c58a 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
sunyiming 1:6465a3f5c58a 181
sunyiming 1:6465a3f5c58a 182 netif_set_addr(netif, ipaddr, netmask, gw);
sunyiming 1:6465a3f5c58a 183
sunyiming 1:6465a3f5c58a 184 /* call user specified initialization function for netif */
sunyiming 1:6465a3f5c58a 185 if (init(netif) != ERR_OK) {
sunyiming 1:6465a3f5c58a 186 return NULL;
sunyiming 1:6465a3f5c58a 187 }
sunyiming 1:6465a3f5c58a 188
sunyiming 1:6465a3f5c58a 189 /* add this netif to the list */
sunyiming 1:6465a3f5c58a 190 netif->next = netif_list;
sunyiming 1:6465a3f5c58a 191 netif_list = netif;
sunyiming 1:6465a3f5c58a 192 snmp_inc_iflist();
sunyiming 1:6465a3f5c58a 193
sunyiming 1:6465a3f5c58a 194 #if LWIP_IGMP
sunyiming 1:6465a3f5c58a 195 /* start IGMP processing */
sunyiming 1:6465a3f5c58a 196 if (netif->flags & NETIF_FLAG_IGMP) {
sunyiming 1:6465a3f5c58a 197 igmp_start(netif);
sunyiming 1:6465a3f5c58a 198 }
sunyiming 1:6465a3f5c58a 199 #endif /* LWIP_IGMP */
sunyiming 1:6465a3f5c58a 200
sunyiming 1:6465a3f5c58a 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
sunyiming 1:6465a3f5c58a 202 netif->name[0], netif->name[1]));
sunyiming 1:6465a3f5c58a 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
sunyiming 1:6465a3f5c58a 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
sunyiming 1:6465a3f5c58a 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
sunyiming 1:6465a3f5c58a 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
sunyiming 1:6465a3f5c58a 207 ip_addr_debug_print(NETIF_DEBUG, gw);
sunyiming 1:6465a3f5c58a 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
sunyiming 1:6465a3f5c58a 209 return netif;
sunyiming 1:6465a3f5c58a 210 }
sunyiming 1:6465a3f5c58a 211
sunyiming 1:6465a3f5c58a 212 /**
sunyiming 1:6465a3f5c58a 213 * Change IP address configuration for a network interface (including netmask
sunyiming 1:6465a3f5c58a 214 * and default gateway).
sunyiming 1:6465a3f5c58a 215 *
sunyiming 1:6465a3f5c58a 216 * @param netif the network interface to change
sunyiming 1:6465a3f5c58a 217 * @param ipaddr the new IP address
sunyiming 1:6465a3f5c58a 218 * @param netmask the new netmask
sunyiming 1:6465a3f5c58a 219 * @param gw the new default gateway
sunyiming 1:6465a3f5c58a 220 */
sunyiming 1:6465a3f5c58a 221 void
sunyiming 1:6465a3f5c58a 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
sunyiming 1:6465a3f5c58a 223 ip_addr_t *gw)
sunyiming 1:6465a3f5c58a 224 {
sunyiming 1:6465a3f5c58a 225 netif_set_ipaddr(netif, ipaddr);
sunyiming 1:6465a3f5c58a 226 netif_set_netmask(netif, netmask);
sunyiming 1:6465a3f5c58a 227 netif_set_gw(netif, gw);
sunyiming 1:6465a3f5c58a 228 }
sunyiming 1:6465a3f5c58a 229
sunyiming 1:6465a3f5c58a 230 /**
sunyiming 1:6465a3f5c58a 231 * Remove a network interface from the list of lwIP netifs.
sunyiming 1:6465a3f5c58a 232 *
sunyiming 1:6465a3f5c58a 233 * @param netif the network interface to remove
sunyiming 1:6465a3f5c58a 234 */
sunyiming 1:6465a3f5c58a 235 void
sunyiming 1:6465a3f5c58a 236 netif_remove(struct netif *netif)
sunyiming 1:6465a3f5c58a 237 {
sunyiming 1:6465a3f5c58a 238 if (netif == NULL) {
sunyiming 1:6465a3f5c58a 239 return;
sunyiming 1:6465a3f5c58a 240 }
sunyiming 1:6465a3f5c58a 241
sunyiming 1:6465a3f5c58a 242 #if LWIP_IGMP
sunyiming 1:6465a3f5c58a 243 /* stop IGMP processing */
sunyiming 1:6465a3f5c58a 244 if (netif->flags & NETIF_FLAG_IGMP) {
sunyiming 1:6465a3f5c58a 245 igmp_stop(netif);
sunyiming 1:6465a3f5c58a 246 }
sunyiming 1:6465a3f5c58a 247 #endif /* LWIP_IGMP */
sunyiming 1:6465a3f5c58a 248 if (netif_is_up(netif)) {
sunyiming 1:6465a3f5c58a 249 /* set netif down before removing (call callback function) */
sunyiming 1:6465a3f5c58a 250 netif_set_down(netif);
sunyiming 1:6465a3f5c58a 251 }
sunyiming 1:6465a3f5c58a 252
sunyiming 1:6465a3f5c58a 253 snmp_delete_ipaddridx_tree(netif);
sunyiming 1:6465a3f5c58a 254
sunyiming 1:6465a3f5c58a 255 /* is it the first netif? */
sunyiming 1:6465a3f5c58a 256 if (netif_list == netif) {
sunyiming 1:6465a3f5c58a 257 netif_list = netif->next;
sunyiming 1:6465a3f5c58a 258 } else {
sunyiming 1:6465a3f5c58a 259 /* look for netif further down the list */
sunyiming 1:6465a3f5c58a 260 struct netif * tmpNetif;
sunyiming 1:6465a3f5c58a 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
sunyiming 1:6465a3f5c58a 262 if (tmpNetif->next == netif) {
sunyiming 1:6465a3f5c58a 263 tmpNetif->next = netif->next;
sunyiming 1:6465a3f5c58a 264 break;
sunyiming 1:6465a3f5c58a 265 }
sunyiming 1:6465a3f5c58a 266 }
sunyiming 1:6465a3f5c58a 267 if (tmpNetif == NULL)
sunyiming 1:6465a3f5c58a 268 return; /* we didn't find any netif today */
sunyiming 1:6465a3f5c58a 269 }
sunyiming 1:6465a3f5c58a 270 snmp_dec_iflist();
sunyiming 1:6465a3f5c58a 271 /* this netif is default? */
sunyiming 1:6465a3f5c58a 272 if (netif_default == netif) {
sunyiming 1:6465a3f5c58a 273 /* reset default netif */
sunyiming 1:6465a3f5c58a 274 netif_set_default(NULL);
sunyiming 1:6465a3f5c58a 275 }
sunyiming 1:6465a3f5c58a 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
sunyiming 1:6465a3f5c58a 277 }
sunyiming 1:6465a3f5c58a 278
sunyiming 1:6465a3f5c58a 279 /**
sunyiming 1:6465a3f5c58a 280 * Find a network interface by searching for its name
sunyiming 1:6465a3f5c58a 281 *
sunyiming 1:6465a3f5c58a 282 * @param name the name of the netif (like netif->name) plus concatenated number
sunyiming 1:6465a3f5c58a 283 * in ascii representation (e.g. 'en0')
sunyiming 1:6465a3f5c58a 284 */
sunyiming 1:6465a3f5c58a 285 struct netif *
sunyiming 1:6465a3f5c58a 286 netif_find(char *name)
sunyiming 1:6465a3f5c58a 287 {
sunyiming 1:6465a3f5c58a 288 struct netif *netif;
sunyiming 1:6465a3f5c58a 289 u8_t num;
sunyiming 1:6465a3f5c58a 290
sunyiming 1:6465a3f5c58a 291 if (name == NULL) {
sunyiming 1:6465a3f5c58a 292 return NULL;
sunyiming 1:6465a3f5c58a 293 }
sunyiming 1:6465a3f5c58a 294
sunyiming 1:6465a3f5c58a 295 num = name[2] - '0';
sunyiming 1:6465a3f5c58a 296
sunyiming 1:6465a3f5c58a 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
sunyiming 1:6465a3f5c58a 298 if (num == netif->num &&
sunyiming 1:6465a3f5c58a 299 name[0] == netif->name[0] &&
sunyiming 1:6465a3f5c58a 300 name[1] == netif->name[1]) {
sunyiming 1:6465a3f5c58a 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
sunyiming 1:6465a3f5c58a 302 return netif;
sunyiming 1:6465a3f5c58a 303 }
sunyiming 1:6465a3f5c58a 304 }
sunyiming 1:6465a3f5c58a 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
sunyiming 1:6465a3f5c58a 306 return NULL;
sunyiming 1:6465a3f5c58a 307 }
sunyiming 1:6465a3f5c58a 308
sunyiming 1:6465a3f5c58a 309 /**
sunyiming 1:6465a3f5c58a 310 * Change the IP address of a network interface
sunyiming 1:6465a3f5c58a 311 *
sunyiming 1:6465a3f5c58a 312 * @param netif the network interface to change
sunyiming 1:6465a3f5c58a 313 * @param ipaddr the new IP address
sunyiming 1:6465a3f5c58a 314 *
sunyiming 1:6465a3f5c58a 315 * @note call netif_set_addr() if you also want to change netmask and
sunyiming 1:6465a3f5c58a 316 * default gateway
sunyiming 1:6465a3f5c58a 317 */
sunyiming 1:6465a3f5c58a 318 void
sunyiming 1:6465a3f5c58a 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
sunyiming 1:6465a3f5c58a 320 {
sunyiming 1:6465a3f5c58a 321 /* Protect against dereferencing NULL pointers by
sunyiming 1:6465a3f5c58a 322 treating like ANY, as does ip_addr_set() */
sunyiming 1:6465a3f5c58a 323 if (!ipaddr) {
sunyiming 1:6465a3f5c58a 324 ipaddr = IP_ADDR_ANY;
sunyiming 1:6465a3f5c58a 325 }
sunyiming 1:6465a3f5c58a 326
sunyiming 1:6465a3f5c58a 327 /* TODO: Handling of obsolete pcbs */
sunyiming 1:6465a3f5c58a 328 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
sunyiming 1:6465a3f5c58a 329 #if LWIP_TCP
sunyiming 1:6465a3f5c58a 330 struct tcp_pcb *pcb;
sunyiming 1:6465a3f5c58a 331 struct tcp_pcb_listen *lpcb;
sunyiming 1:6465a3f5c58a 332
sunyiming 1:6465a3f5c58a 333 /* address is actually being changed? */
sunyiming 1:6465a3f5c58a 334 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
sunyiming 1:6465a3f5c58a 335 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
sunyiming 1:6465a3f5c58a 336 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
sunyiming 1:6465a3f5c58a 337 pcb = tcp_active_pcbs;
sunyiming 1:6465a3f5c58a 338 while (pcb != NULL) {
sunyiming 1:6465a3f5c58a 339 /* PCB bound to current local interface address? */
sunyiming 1:6465a3f5c58a 340 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
sunyiming 1:6465a3f5c58a 341 #if LWIP_AUTOIP
sunyiming 1:6465a3f5c58a 342 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
sunyiming 1:6465a3f5c58a 343 && !ip_addr_islinklocal(&(pcb->local_ip))
sunyiming 1:6465a3f5c58a 344 #endif /* LWIP_AUTOIP */
sunyiming 1:6465a3f5c58a 345 ) {
sunyiming 1:6465a3f5c58a 346 /* this connection must be aborted */
sunyiming 1:6465a3f5c58a 347 struct tcp_pcb *next = pcb->next;
sunyiming 1:6465a3f5c58a 348 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
sunyiming 1:6465a3f5c58a 349 tcp_abort(pcb);
sunyiming 1:6465a3f5c58a 350 pcb = next;
sunyiming 1:6465a3f5c58a 351 } else {
sunyiming 1:6465a3f5c58a 352 pcb = pcb->next;
sunyiming 1:6465a3f5c58a 353 }
sunyiming 1:6465a3f5c58a 354 }
sunyiming 1:6465a3f5c58a 355 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
sunyiming 1:6465a3f5c58a 356 /* PCB bound to current local interface address? */
sunyiming 1:6465a3f5c58a 357 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
sunyiming 1:6465a3f5c58a 358 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
sunyiming 1:6465a3f5c58a 359 /* The PCB is listening to the old ipaddr and
sunyiming 1:6465a3f5c58a 360 * is set to listen to the new one instead */
sunyiming 1:6465a3f5c58a 361 ip_addr_set(&(lpcb->local_ip), ipaddr);
sunyiming 1:6465a3f5c58a 362 }
sunyiming 1:6465a3f5c58a 363 }
sunyiming 1:6465a3f5c58a 364 }
sunyiming 1:6465a3f5c58a 365 #endif
sunyiming 1:6465a3f5c58a 366 snmp_delete_ipaddridx_tree(netif);
sunyiming 1:6465a3f5c58a 367 snmp_delete_iprteidx_tree(0,netif);
sunyiming 1:6465a3f5c58a 368 /* set new IP address to netif */
sunyiming 1:6465a3f5c58a 369 ip_addr_set(&(netif->ip_addr), ipaddr);
sunyiming 1:6465a3f5c58a 370 snmp_insert_ipaddridx_tree(netif);
sunyiming 1:6465a3f5c58a 371 snmp_insert_iprteidx_tree(0,netif);
sunyiming 1:6465a3f5c58a 372
sunyiming 1:6465a3f5c58a 373 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
sunyiming 1:6465a3f5c58a 374 netif->name[0], netif->name[1],
sunyiming 1:6465a3f5c58a 375 ip4_addr1_16(&netif->ip_addr),
sunyiming 1:6465a3f5c58a 376 ip4_addr2_16(&netif->ip_addr),
sunyiming 1:6465a3f5c58a 377 ip4_addr3_16(&netif->ip_addr),
sunyiming 1:6465a3f5c58a 378 ip4_addr4_16(&netif->ip_addr)));
sunyiming 1:6465a3f5c58a 379 }
sunyiming 1:6465a3f5c58a 380
sunyiming 1:6465a3f5c58a 381 /**
sunyiming 1:6465a3f5c58a 382 * Change the default gateway for a network interface
sunyiming 1:6465a3f5c58a 383 *
sunyiming 1:6465a3f5c58a 384 * @param netif the network interface to change
sunyiming 1:6465a3f5c58a 385 * @param gw the new default gateway
sunyiming 1:6465a3f5c58a 386 *
sunyiming 1:6465a3f5c58a 387 * @note call netif_set_addr() if you also want to change ip address and netmask
sunyiming 1:6465a3f5c58a 388 */
sunyiming 1:6465a3f5c58a 389 void
sunyiming 1:6465a3f5c58a 390 netif_set_gw(struct netif *netif, ip_addr_t *gw)
sunyiming 1:6465a3f5c58a 391 {
sunyiming 1:6465a3f5c58a 392 ip_addr_set(&(netif->gw), gw);
sunyiming 1:6465a3f5c58a 393 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
sunyiming 1:6465a3f5c58a 394 netif->name[0], netif->name[1],
sunyiming 1:6465a3f5c58a 395 ip4_addr1_16(&netif->gw),
sunyiming 1:6465a3f5c58a 396 ip4_addr2_16(&netif->gw),
sunyiming 1:6465a3f5c58a 397 ip4_addr3_16(&netif->gw),
sunyiming 1:6465a3f5c58a 398 ip4_addr4_16(&netif->gw)));
sunyiming 1:6465a3f5c58a 399 }
sunyiming 1:6465a3f5c58a 400
sunyiming 1:6465a3f5c58a 401 /**
sunyiming 1:6465a3f5c58a 402 * Change the netmask of a network interface
sunyiming 1:6465a3f5c58a 403 *
sunyiming 1:6465a3f5c58a 404 * @param netif the network interface to change
sunyiming 1:6465a3f5c58a 405 * @param netmask the new netmask
sunyiming 1:6465a3f5c58a 406 *
sunyiming 1:6465a3f5c58a 407 * @note call netif_set_addr() if you also want to change ip address and
sunyiming 1:6465a3f5c58a 408 * default gateway
sunyiming 1:6465a3f5c58a 409 */
sunyiming 1:6465a3f5c58a 410 void
sunyiming 1:6465a3f5c58a 411 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
sunyiming 1:6465a3f5c58a 412 {
sunyiming 1:6465a3f5c58a 413 snmp_delete_iprteidx_tree(0, netif);
sunyiming 1:6465a3f5c58a 414 /* set new netmask to netif */
sunyiming 1:6465a3f5c58a 415 ip_addr_set(&(netif->netmask), netmask);
sunyiming 1:6465a3f5c58a 416 snmp_insert_iprteidx_tree(0, netif);
sunyiming 1:6465a3f5c58a 417 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
sunyiming 1:6465a3f5c58a 418 netif->name[0], netif->name[1],
sunyiming 1:6465a3f5c58a 419 ip4_addr1_16(&netif->netmask),
sunyiming 1:6465a3f5c58a 420 ip4_addr2_16(&netif->netmask),
sunyiming 1:6465a3f5c58a 421 ip4_addr3_16(&netif->netmask),
sunyiming 1:6465a3f5c58a 422 ip4_addr4_16(&netif->netmask)));
sunyiming 1:6465a3f5c58a 423 }
sunyiming 1:6465a3f5c58a 424
sunyiming 1:6465a3f5c58a 425 /**
sunyiming 1:6465a3f5c58a 426 * Set a network interface as the default network interface
sunyiming 1:6465a3f5c58a 427 * (used to output all packets for which no specific route is found)
sunyiming 1:6465a3f5c58a 428 *
sunyiming 1:6465a3f5c58a 429 * @param netif the default network interface
sunyiming 1:6465a3f5c58a 430 */
sunyiming 1:6465a3f5c58a 431 void
sunyiming 1:6465a3f5c58a 432 netif_set_default(struct netif *netif)
sunyiming 1:6465a3f5c58a 433 {
sunyiming 1:6465a3f5c58a 434 if (netif == NULL) {
sunyiming 1:6465a3f5c58a 435 /* remove default route */
sunyiming 1:6465a3f5c58a 436 snmp_delete_iprteidx_tree(1, netif);
sunyiming 1:6465a3f5c58a 437 } else {
sunyiming 1:6465a3f5c58a 438 /* install default route */
sunyiming 1:6465a3f5c58a 439 snmp_insert_iprteidx_tree(1, netif);
sunyiming 1:6465a3f5c58a 440 }
sunyiming 1:6465a3f5c58a 441 netif_default = netif;
sunyiming 1:6465a3f5c58a 442 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
sunyiming 1:6465a3f5c58a 443 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
sunyiming 1:6465a3f5c58a 444 }
sunyiming 1:6465a3f5c58a 445
sunyiming 1:6465a3f5c58a 446 /**
sunyiming 1:6465a3f5c58a 447 * Bring an interface up, available for processing
sunyiming 1:6465a3f5c58a 448 * traffic.
sunyiming 1:6465a3f5c58a 449 *
sunyiming 1:6465a3f5c58a 450 * @note: Enabling DHCP on a down interface will make it come
sunyiming 1:6465a3f5c58a 451 * up once configured.
sunyiming 1:6465a3f5c58a 452 *
sunyiming 1:6465a3f5c58a 453 * @see dhcp_start()
sunyiming 1:6465a3f5c58a 454 */
sunyiming 1:6465a3f5c58a 455 void netif_set_up(struct netif *netif)
sunyiming 1:6465a3f5c58a 456 {
sunyiming 1:6465a3f5c58a 457 if (!(netif->flags & NETIF_FLAG_UP)) {
sunyiming 1:6465a3f5c58a 458 netif->flags |= NETIF_FLAG_UP;
sunyiming 1:6465a3f5c58a 459
sunyiming 1:6465a3f5c58a 460 #if LWIP_SNMP
sunyiming 1:6465a3f5c58a 461 snmp_get_sysuptime(&netif->ts);
sunyiming 1:6465a3f5c58a 462 #endif /* LWIP_SNMP */
sunyiming 1:6465a3f5c58a 463
sunyiming 1:6465a3f5c58a 464 NETIF_STATUS_CALLBACK(netif);
sunyiming 1:6465a3f5c58a 465
sunyiming 1:6465a3f5c58a 466 if (netif->flags & NETIF_FLAG_LINK_UP) {
sunyiming 1:6465a3f5c58a 467 #if LWIP_ARP
sunyiming 1:6465a3f5c58a 468 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
sunyiming 1:6465a3f5c58a 469 if (netif->flags & (NETIF_FLAG_ETHARP)) {
sunyiming 1:6465a3f5c58a 470 etharp_gratuitous(netif);
sunyiming 1:6465a3f5c58a 471 }
sunyiming 1:6465a3f5c58a 472 #endif /* LWIP_ARP */
sunyiming 1:6465a3f5c58a 473
sunyiming 1:6465a3f5c58a 474 #if LWIP_IGMP
sunyiming 1:6465a3f5c58a 475 /* resend IGMP memberships */
sunyiming 1:6465a3f5c58a 476 if (netif->flags & NETIF_FLAG_IGMP) {
sunyiming 1:6465a3f5c58a 477 igmp_report_groups( netif);
sunyiming 1:6465a3f5c58a 478 }
sunyiming 1:6465a3f5c58a 479 #endif /* LWIP_IGMP */
sunyiming 1:6465a3f5c58a 480 }
sunyiming 1:6465a3f5c58a 481 }
sunyiming 1:6465a3f5c58a 482 }
sunyiming 1:6465a3f5c58a 483
sunyiming 1:6465a3f5c58a 484 /**
sunyiming 1:6465a3f5c58a 485 * Bring an interface down, disabling any traffic processing.
sunyiming 1:6465a3f5c58a 486 *
sunyiming 1:6465a3f5c58a 487 * @note: Enabling DHCP on a down interface will make it come
sunyiming 1:6465a3f5c58a 488 * up once configured.
sunyiming 1:6465a3f5c58a 489 *
sunyiming 1:6465a3f5c58a 490 * @see dhcp_start()
sunyiming 1:6465a3f5c58a 491 */
sunyiming 1:6465a3f5c58a 492 void netif_set_down(struct netif *netif)
sunyiming 1:6465a3f5c58a 493 {
sunyiming 1:6465a3f5c58a 494 if (netif->flags & NETIF_FLAG_UP) {
sunyiming 1:6465a3f5c58a 495 netif->flags &= ~NETIF_FLAG_UP;
sunyiming 1:6465a3f5c58a 496 #if LWIP_SNMP
sunyiming 1:6465a3f5c58a 497 snmp_get_sysuptime(&netif->ts);
sunyiming 1:6465a3f5c58a 498 #endif
sunyiming 1:6465a3f5c58a 499
sunyiming 1:6465a3f5c58a 500 NETIF_STATUS_CALLBACK(netif);
sunyiming 1:6465a3f5c58a 501 }
sunyiming 1:6465a3f5c58a 502 }
sunyiming 1:6465a3f5c58a 503
sunyiming 1:6465a3f5c58a 504 #if LWIP_NETIF_STATUS_CALLBACK
sunyiming 1:6465a3f5c58a 505 /**
sunyiming 1:6465a3f5c58a 506 * Set callback to be called when interface is brought up/down
sunyiming 1:6465a3f5c58a 507 */
sunyiming 1:6465a3f5c58a 508 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
sunyiming 1:6465a3f5c58a 509 {
sunyiming 1:6465a3f5c58a 510 if (netif) {
sunyiming 1:6465a3f5c58a 511 netif->status_callback = status_callback;
sunyiming 1:6465a3f5c58a 512 }
sunyiming 1:6465a3f5c58a 513 }
sunyiming 1:6465a3f5c58a 514 #endif /* LWIP_NETIF_STATUS_CALLBACK */
sunyiming 1:6465a3f5c58a 515
sunyiming 1:6465a3f5c58a 516 /**
sunyiming 1:6465a3f5c58a 517 * Called by a driver when its link goes up
sunyiming 1:6465a3f5c58a 518 */
sunyiming 1:6465a3f5c58a 519 void netif_set_link_up(struct netif *netif )
sunyiming 1:6465a3f5c58a 520 {
sunyiming 1:6465a3f5c58a 521 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
sunyiming 1:6465a3f5c58a 522 netif->flags |= NETIF_FLAG_LINK_UP;
sunyiming 1:6465a3f5c58a 523
sunyiming 1:6465a3f5c58a 524 #if LWIP_DHCP
sunyiming 1:6465a3f5c58a 525 if (netif->dhcp) {
sunyiming 1:6465a3f5c58a 526 dhcp_network_changed(netif);
sunyiming 1:6465a3f5c58a 527 }
sunyiming 1:6465a3f5c58a 528 #endif /* LWIP_DHCP */
sunyiming 1:6465a3f5c58a 529
sunyiming 1:6465a3f5c58a 530 #if LWIP_AUTOIP
sunyiming 1:6465a3f5c58a 531 if (netif->autoip) {
sunyiming 1:6465a3f5c58a 532 autoip_network_changed(netif);
sunyiming 1:6465a3f5c58a 533 }
sunyiming 1:6465a3f5c58a 534 #endif /* LWIP_AUTOIP */
sunyiming 1:6465a3f5c58a 535
sunyiming 1:6465a3f5c58a 536 if (netif->flags & NETIF_FLAG_UP) {
sunyiming 1:6465a3f5c58a 537 #if LWIP_ARP
sunyiming 1:6465a3f5c58a 538 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
sunyiming 1:6465a3f5c58a 539 if (netif->flags & NETIF_FLAG_ETHARP) {
sunyiming 1:6465a3f5c58a 540 etharp_gratuitous(netif);
sunyiming 1:6465a3f5c58a 541 }
sunyiming 1:6465a3f5c58a 542 #endif /* LWIP_ARP */
sunyiming 1:6465a3f5c58a 543
sunyiming 1:6465a3f5c58a 544 #if LWIP_IGMP
sunyiming 1:6465a3f5c58a 545 /* resend IGMP memberships */
sunyiming 1:6465a3f5c58a 546 if (netif->flags & NETIF_FLAG_IGMP) {
sunyiming 1:6465a3f5c58a 547 igmp_report_groups( netif);
sunyiming 1:6465a3f5c58a 548 }
sunyiming 1:6465a3f5c58a 549 #endif /* LWIP_IGMP */
sunyiming 1:6465a3f5c58a 550 }
sunyiming 1:6465a3f5c58a 551 NETIF_LINK_CALLBACK(netif);
sunyiming 1:6465a3f5c58a 552 }
sunyiming 1:6465a3f5c58a 553 }
sunyiming 1:6465a3f5c58a 554
sunyiming 1:6465a3f5c58a 555 /**
sunyiming 1:6465a3f5c58a 556 * Called by a driver when its link goes down
sunyiming 1:6465a3f5c58a 557 */
sunyiming 1:6465a3f5c58a 558 void netif_set_link_down(struct netif *netif )
sunyiming 1:6465a3f5c58a 559 {
sunyiming 1:6465a3f5c58a 560 if (netif->flags & NETIF_FLAG_LINK_UP) {
sunyiming 1:6465a3f5c58a 561 netif->flags &= ~NETIF_FLAG_LINK_UP;
sunyiming 1:6465a3f5c58a 562 NETIF_LINK_CALLBACK(netif);
sunyiming 1:6465a3f5c58a 563 }
sunyiming 1:6465a3f5c58a 564 }
sunyiming 1:6465a3f5c58a 565
sunyiming 1:6465a3f5c58a 566 #if LWIP_NETIF_LINK_CALLBACK
sunyiming 1:6465a3f5c58a 567 /**
sunyiming 1:6465a3f5c58a 568 * Set callback to be called when link is brought up/down
sunyiming 1:6465a3f5c58a 569 */
sunyiming 1:6465a3f5c58a 570 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
sunyiming 1:6465a3f5c58a 571 {
sunyiming 1:6465a3f5c58a 572 if (netif) {
sunyiming 1:6465a3f5c58a 573 netif->link_callback = link_callback;
sunyiming 1:6465a3f5c58a 574 }
sunyiming 1:6465a3f5c58a 575 }
sunyiming 1:6465a3f5c58a 576 #endif /* LWIP_NETIF_LINK_CALLBACK */
sunyiming 1:6465a3f5c58a 577
sunyiming 1:6465a3f5c58a 578 #if ENABLE_LOOPBACK
sunyiming 1:6465a3f5c58a 579 /**
sunyiming 1:6465a3f5c58a 580 * Send an IP packet to be received on the same netif (loopif-like).
sunyiming 1:6465a3f5c58a 581 * The pbuf is simply copied and handed back to netif->input.
sunyiming 1:6465a3f5c58a 582 * In multithreaded mode, this is done directly since netif->input must put
sunyiming 1:6465a3f5c58a 583 * the packet on a queue.
sunyiming 1:6465a3f5c58a 584 * In callback mode, the packet is put on an internal queue and is fed to
sunyiming 1:6465a3f5c58a 585 * netif->input by netif_poll().
sunyiming 1:6465a3f5c58a 586 *
sunyiming 1:6465a3f5c58a 587 * @param netif the lwip network interface structure
sunyiming 1:6465a3f5c58a 588 * @param p the (IP) packet to 'send'
sunyiming 1:6465a3f5c58a 589 * @param ipaddr the ip address to send the packet to (not used)
sunyiming 1:6465a3f5c58a 590 * @return ERR_OK if the packet has been sent
sunyiming 1:6465a3f5c58a 591 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
sunyiming 1:6465a3f5c58a 592 */
sunyiming 1:6465a3f5c58a 593 err_t
sunyiming 1:6465a3f5c58a 594 netif_loop_output(struct netif *netif, struct pbuf *p,
sunyiming 1:6465a3f5c58a 595 ip_addr_t *ipaddr)
sunyiming 1:6465a3f5c58a 596 {
sunyiming 1:6465a3f5c58a 597 struct pbuf *r;
sunyiming 1:6465a3f5c58a 598 err_t err;
sunyiming 1:6465a3f5c58a 599 struct pbuf *last;
sunyiming 1:6465a3f5c58a 600 #if LWIP_LOOPBACK_MAX_PBUFS
sunyiming 1:6465a3f5c58a 601 u8_t clen = 0;
sunyiming 1:6465a3f5c58a 602 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
sunyiming 1:6465a3f5c58a 603 /* If we have a loopif, SNMP counters are adjusted for it,
sunyiming 1:6465a3f5c58a 604 * if not they are adjusted for 'netif'. */
sunyiming 1:6465a3f5c58a 605 #if LWIP_SNMP
sunyiming 1:6465a3f5c58a 606 #if LWIP_HAVE_LOOPIF
sunyiming 1:6465a3f5c58a 607 struct netif *stats_if = &loop_netif;
sunyiming 1:6465a3f5c58a 608 #else /* LWIP_HAVE_LOOPIF */
sunyiming 1:6465a3f5c58a 609 struct netif *stats_if = netif;
sunyiming 1:6465a3f5c58a 610 #endif /* LWIP_HAVE_LOOPIF */
sunyiming 1:6465a3f5c58a 611 #endif /* LWIP_SNMP */
sunyiming 1:6465a3f5c58a 612 SYS_ARCH_DECL_PROTECT(lev);
sunyiming 1:6465a3f5c58a 613 LWIP_UNUSED_ARG(ipaddr);
sunyiming 1:6465a3f5c58a 614
sunyiming 1:6465a3f5c58a 615 /* Allocate a new pbuf */
sunyiming 1:6465a3f5c58a 616 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
sunyiming 1:6465a3f5c58a 617 if (r == NULL) {
sunyiming 1:6465a3f5c58a 618 LINK_STATS_INC(link.memerr);
sunyiming 1:6465a3f5c58a 619 LINK_STATS_INC(link.drop);
sunyiming 1:6465a3f5c58a 620 snmp_inc_ifoutdiscards(stats_if);
sunyiming 1:6465a3f5c58a 621 return ERR_MEM;
sunyiming 1:6465a3f5c58a 622 }
sunyiming 1:6465a3f5c58a 623 #if LWIP_LOOPBACK_MAX_PBUFS
sunyiming 1:6465a3f5c58a 624 clen = pbuf_clen(r);
sunyiming 1:6465a3f5c58a 625 /* check for overflow or too many pbuf on queue */
sunyiming 1:6465a3f5c58a 626 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
sunyiming 1:6465a3f5c58a 627 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
sunyiming 1:6465a3f5c58a 628 pbuf_free(r);
sunyiming 1:6465a3f5c58a 629 LINK_STATS_INC(link.memerr);
sunyiming 1:6465a3f5c58a 630 LINK_STATS_INC(link.drop);
sunyiming 1:6465a3f5c58a 631 snmp_inc_ifoutdiscards(stats_if);
sunyiming 1:6465a3f5c58a 632 return ERR_MEM;
sunyiming 1:6465a3f5c58a 633 }
sunyiming 1:6465a3f5c58a 634 netif->loop_cnt_current += clen;
sunyiming 1:6465a3f5c58a 635 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
sunyiming 1:6465a3f5c58a 636
sunyiming 1:6465a3f5c58a 637 /* Copy the whole pbuf queue p into the single pbuf r */
sunyiming 1:6465a3f5c58a 638 if ((err = pbuf_copy(r, p)) != ERR_OK) {
sunyiming 1:6465a3f5c58a 639 pbuf_free(r);
sunyiming 1:6465a3f5c58a 640 LINK_STATS_INC(link.memerr);
sunyiming 1:6465a3f5c58a 641 LINK_STATS_INC(link.drop);
sunyiming 1:6465a3f5c58a 642 snmp_inc_ifoutdiscards(stats_if);
sunyiming 1:6465a3f5c58a 643 return err;
sunyiming 1:6465a3f5c58a 644 }
sunyiming 1:6465a3f5c58a 645
sunyiming 1:6465a3f5c58a 646 /* Put the packet on a linked list which gets emptied through calling
sunyiming 1:6465a3f5c58a 647 netif_poll(). */
sunyiming 1:6465a3f5c58a 648
sunyiming 1:6465a3f5c58a 649 /* let last point to the last pbuf in chain r */
sunyiming 1:6465a3f5c58a 650 for (last = r; last->next != NULL; last = last->next);
sunyiming 1:6465a3f5c58a 651
sunyiming 1:6465a3f5c58a 652 SYS_ARCH_PROTECT(lev);
sunyiming 1:6465a3f5c58a 653 if(netif->loop_first != NULL) {
sunyiming 1:6465a3f5c58a 654 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
sunyiming 1:6465a3f5c58a 655 netif->loop_last->next = r;
sunyiming 1:6465a3f5c58a 656 netif->loop_last = last;
sunyiming 1:6465a3f5c58a 657 } else {
sunyiming 1:6465a3f5c58a 658 netif->loop_first = r;
sunyiming 1:6465a3f5c58a 659 netif->loop_last = last;
sunyiming 1:6465a3f5c58a 660 }
sunyiming 1:6465a3f5c58a 661 SYS_ARCH_UNPROTECT(lev);
sunyiming 1:6465a3f5c58a 662
sunyiming 1:6465a3f5c58a 663 LINK_STATS_INC(link.xmit);
sunyiming 1:6465a3f5c58a 664 snmp_add_ifoutoctets(stats_if, p->tot_len);
sunyiming 1:6465a3f5c58a 665 snmp_inc_ifoutucastpkts(stats_if);
sunyiming 1:6465a3f5c58a 666
sunyiming 1:6465a3f5c58a 667 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
sunyiming 1:6465a3f5c58a 668 /* For multithreading environment, schedule a call to netif_poll */
sunyiming 1:6465a3f5c58a 669 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
sunyiming 1:6465a3f5c58a 670 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
sunyiming 1:6465a3f5c58a 671
sunyiming 1:6465a3f5c58a 672 return ERR_OK;
sunyiming 1:6465a3f5c58a 673 }
sunyiming 1:6465a3f5c58a 674
sunyiming 1:6465a3f5c58a 675 /**
sunyiming 1:6465a3f5c58a 676 * Call netif_poll() in the main loop of your application. This is to prevent
sunyiming 1:6465a3f5c58a 677 * reentering non-reentrant functions like tcp_input(). Packets passed to
sunyiming 1:6465a3f5c58a 678 * netif_loop_output() are put on a list that is passed to netif->input() by
sunyiming 1:6465a3f5c58a 679 * netif_poll().
sunyiming 1:6465a3f5c58a 680 */
sunyiming 1:6465a3f5c58a 681 void
sunyiming 1:6465a3f5c58a 682 netif_poll(struct netif *netif)
sunyiming 1:6465a3f5c58a 683 {
sunyiming 1:6465a3f5c58a 684 struct pbuf *in;
sunyiming 1:6465a3f5c58a 685 /* If we have a loopif, SNMP counters are adjusted for it,
sunyiming 1:6465a3f5c58a 686 * if not they are adjusted for 'netif'. */
sunyiming 1:6465a3f5c58a 687 #if LWIP_SNMP
sunyiming 1:6465a3f5c58a 688 #if LWIP_HAVE_LOOPIF
sunyiming 1:6465a3f5c58a 689 struct netif *stats_if = &loop_netif;
sunyiming 1:6465a3f5c58a 690 #else /* LWIP_HAVE_LOOPIF */
sunyiming 1:6465a3f5c58a 691 struct netif *stats_if = netif;
sunyiming 1:6465a3f5c58a 692 #endif /* LWIP_HAVE_LOOPIF */
sunyiming 1:6465a3f5c58a 693 #endif /* LWIP_SNMP */
sunyiming 1:6465a3f5c58a 694 SYS_ARCH_DECL_PROTECT(lev);
sunyiming 1:6465a3f5c58a 695
sunyiming 1:6465a3f5c58a 696 do {
sunyiming 1:6465a3f5c58a 697 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
sunyiming 1:6465a3f5c58a 698 SYS_ARCH_PROTECT(lev);
sunyiming 1:6465a3f5c58a 699 in = netif->loop_first;
sunyiming 1:6465a3f5c58a 700 if (in != NULL) {
sunyiming 1:6465a3f5c58a 701 struct pbuf *in_end = in;
sunyiming 1:6465a3f5c58a 702 #if LWIP_LOOPBACK_MAX_PBUFS
sunyiming 1:6465a3f5c58a 703 u8_t clen = pbuf_clen(in);
sunyiming 1:6465a3f5c58a 704 /* adjust the number of pbufs on queue */
sunyiming 1:6465a3f5c58a 705 LWIP_ASSERT("netif->loop_cnt_current underflow",
sunyiming 1:6465a3f5c58a 706 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
sunyiming 1:6465a3f5c58a 707 netif->loop_cnt_current -= clen;
sunyiming 1:6465a3f5c58a 708 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
sunyiming 1:6465a3f5c58a 709 while (in_end->len != in_end->tot_len) {
sunyiming 1:6465a3f5c58a 710 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
sunyiming 1:6465a3f5c58a 711 in_end = in_end->next;
sunyiming 1:6465a3f5c58a 712 }
sunyiming 1:6465a3f5c58a 713 /* 'in_end' now points to the last pbuf from 'in' */
sunyiming 1:6465a3f5c58a 714 if (in_end == netif->loop_last) {
sunyiming 1:6465a3f5c58a 715 /* this was the last pbuf in the list */
sunyiming 1:6465a3f5c58a 716 netif->loop_first = netif->loop_last = NULL;
sunyiming 1:6465a3f5c58a 717 } else {
sunyiming 1:6465a3f5c58a 718 /* pop the pbuf off the list */
sunyiming 1:6465a3f5c58a 719 netif->loop_first = in_end->next;
sunyiming 1:6465a3f5c58a 720 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
sunyiming 1:6465a3f5c58a 721 }
sunyiming 1:6465a3f5c58a 722 /* De-queue the pbuf from its successors on the 'loop_' list. */
sunyiming 1:6465a3f5c58a 723 in_end->next = NULL;
sunyiming 1:6465a3f5c58a 724 }
sunyiming 1:6465a3f5c58a 725 SYS_ARCH_UNPROTECT(lev);
sunyiming 1:6465a3f5c58a 726
sunyiming 1:6465a3f5c58a 727 if (in != NULL) {
sunyiming 1:6465a3f5c58a 728 LINK_STATS_INC(link.recv);
sunyiming 1:6465a3f5c58a 729 snmp_add_ifinoctets(stats_if, in->tot_len);
sunyiming 1:6465a3f5c58a 730 snmp_inc_ifinucastpkts(stats_if);
sunyiming 1:6465a3f5c58a 731 /* loopback packets are always IP packets! */
sunyiming 1:6465a3f5c58a 732 if (ip_input(in, netif) != ERR_OK) {
sunyiming 1:6465a3f5c58a 733 pbuf_free(in);
sunyiming 1:6465a3f5c58a 734 }
sunyiming 1:6465a3f5c58a 735 /* Don't reference the packet any more! */
sunyiming 1:6465a3f5c58a 736 in = NULL;
sunyiming 1:6465a3f5c58a 737 }
sunyiming 1:6465a3f5c58a 738 /* go on while there is a packet on the list */
sunyiming 1:6465a3f5c58a 739 } while (netif->loop_first != NULL);
sunyiming 1:6465a3f5c58a 740 }
sunyiming 1:6465a3f5c58a 741
sunyiming 1:6465a3f5c58a 742 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
sunyiming 1:6465a3f5c58a 743 /**
sunyiming 1:6465a3f5c58a 744 * Calls netif_poll() for every netif on the netif_list.
sunyiming 1:6465a3f5c58a 745 */
sunyiming 1:6465a3f5c58a 746 void
sunyiming 1:6465a3f5c58a 747 netif_poll_all(void)
sunyiming 1:6465a3f5c58a 748 {
sunyiming 1:6465a3f5c58a 749 struct netif *netif = netif_list;
sunyiming 1:6465a3f5c58a 750 /* loop through netifs */
sunyiming 1:6465a3f5c58a 751 while (netif != NULL) {
sunyiming 1:6465a3f5c58a 752 netif_poll(netif);
sunyiming 1:6465a3f5c58a 753 /* proceed to next network interface */
sunyiming 1:6465a3f5c58a 754 netif = netif->next;
sunyiming 1:6465a3f5c58a 755 }
sunyiming 1:6465a3f5c58a 756 }
sunyiming 1:6465a3f5c58a 757 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
sunyiming 1:6465a3f5c58a 758 #endif /* ENABLE_LOOPBACK */