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Library for Bert van Dam's book "ARM MICROCONTROLLERS" For all chapters with internet.

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NetServices/lwip/core/netif.c@0:4edb816d21e1, 2015-10-16 (annotated)

Committer:
ICTFBI
Date:
Fri Oct 16 14:28:26 2015 +0000
Revision:
0:4edb816d21e1
Pre-update 16-10-15

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ICTFBI 0:4edb816d21e1 1 /**
ICTFBI 0:4edb816d21e1 2 * @file
ICTFBI 0:4edb816d21e1 3 * lwIP network interface abstraction
ICTFBI 0:4edb816d21e1 4 *
ICTFBI 0:4edb816d21e1 5 */
ICTFBI 0:4edb816d21e1 6
ICTFBI 0:4edb816d21e1 7 /*
ICTFBI 0:4edb816d21e1 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
ICTFBI 0:4edb816d21e1 9 * All rights reserved.
ICTFBI 0:4edb816d21e1 10 *
ICTFBI 0:4edb816d21e1 11 * Redistribution and use in source and binary forms, with or without modification,
ICTFBI 0:4edb816d21e1 12 * are permitted provided that the following conditions are met:
ICTFBI 0:4edb816d21e1 13 *
ICTFBI 0:4edb816d21e1 14 * 1. Redistributions of source code must retain the above copyright notice,
ICTFBI 0:4edb816d21e1 15 * this list of conditions and the following disclaimer.
ICTFBI 0:4edb816d21e1 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
ICTFBI 0:4edb816d21e1 17 * this list of conditions and the following disclaimer in the documentation
ICTFBI 0:4edb816d21e1 18 * and/or other materials provided with the distribution.
ICTFBI 0:4edb816d21e1 19 * 3. The name of the author may not be used to endorse or promote products
ICTFBI 0:4edb816d21e1 20 * derived from this software without specific prior written permission.
ICTFBI 0:4edb816d21e1 21 *
ICTFBI 0:4edb816d21e1 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
ICTFBI 0:4edb816d21e1 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
ICTFBI 0:4edb816d21e1 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
ICTFBI 0:4edb816d21e1 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
ICTFBI 0:4edb816d21e1 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
ICTFBI 0:4edb816d21e1 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
ICTFBI 0:4edb816d21e1 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
ICTFBI 0:4edb816d21e1 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
ICTFBI 0:4edb816d21e1 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
ICTFBI 0:4edb816d21e1 31 * OF SUCH DAMAGE.
ICTFBI 0:4edb816d21e1 32 *
ICTFBI 0:4edb816d21e1 33 * This file is part of the lwIP TCP/IP stack.
ICTFBI 0:4edb816d21e1 34 *
ICTFBI 0:4edb816d21e1 35 * Author: Adam Dunkels <adam@sics.se>
ICTFBI 0:4edb816d21e1 36 *
ICTFBI 0:4edb816d21e1 37 */
ICTFBI 0:4edb816d21e1 38
ICTFBI 0:4edb816d21e1 39 #include "lwip/opt.h"
ICTFBI 0:4edb816d21e1 40
ICTFBI 0:4edb816d21e1 41 #include "lwip/def.h"
ICTFBI 0:4edb816d21e1 42 #include "lwip/ip_addr.h"
ICTFBI 0:4edb816d21e1 43 #include "lwip/netif.h"
ICTFBI 0:4edb816d21e1 44 #include "lwip/tcp_impl.h"
ICTFBI 0:4edb816d21e1 45 #include "lwip/snmp.h"
ICTFBI 0:4edb816d21e1 46 #include "lwip/igmp.h"
ICTFBI 0:4edb816d21e1 47 #include "netif/etharp.h"
ICTFBI 0:4edb816d21e1 48 #include "lwip/stats.h"
ICTFBI 0:4edb816d21e1 49 #if ENABLE_LOOPBACK
ICTFBI 0:4edb816d21e1 50 #include "lwip/sys.h"
ICTFBI 0:4edb816d21e1 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
ICTFBI 0:4edb816d21e1 52 #include "lwip/tcpip.h"
ICTFBI 0:4edb816d21e1 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
ICTFBI 0:4edb816d21e1 54 #endif /* ENABLE_LOOPBACK */
ICTFBI 0:4edb816d21e1 55
ICTFBI 0:4edb816d21e1 56 #if LWIP_AUTOIP
ICTFBI 0:4edb816d21e1 57 #include "lwip/autoip.h"
ICTFBI 0:4edb816d21e1 58 #endif /* LWIP_AUTOIP */
ICTFBI 0:4edb816d21e1 59 #if LWIP_DHCP
ICTFBI 0:4edb816d21e1 60 #include "lwip/dhcp.h"
ICTFBI 0:4edb816d21e1 61 #endif /* LWIP_DHCP */
ICTFBI 0:4edb816d21e1 62
ICTFBI 0:4edb816d21e1 63 #if LWIP_NETIF_STATUS_CALLBACK
ICTFBI 0:4edb816d21e1 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
ICTFBI 0:4edb816d21e1 65 #else
ICTFBI 0:4edb816d21e1 66 #define NETIF_STATUS_CALLBACK(n)
ICTFBI 0:4edb816d21e1 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
ICTFBI 0:4edb816d21e1 68
ICTFBI 0:4edb816d21e1 69 #if LWIP_NETIF_LINK_CALLBACK
ICTFBI 0:4edb816d21e1 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
ICTFBI 0:4edb816d21e1 71 #else
ICTFBI 0:4edb816d21e1 72 #define NETIF_LINK_CALLBACK(n)
ICTFBI 0:4edb816d21e1 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
ICTFBI 0:4edb816d21e1 74
ICTFBI 0:4edb816d21e1 75 struct netif *netif_list;
ICTFBI 0:4edb816d21e1 76 struct netif *netif_default;
ICTFBI 0:4edb816d21e1 77
ICTFBI 0:4edb816d21e1 78 #if LWIP_HAVE_LOOPIF
ICTFBI 0:4edb816d21e1 79 static struct netif loop_netif;
ICTFBI 0:4edb816d21e1 80
ICTFBI 0:4edb816d21e1 81 /**
ICTFBI 0:4edb816d21e1 82 * Initialize a lwip network interface structure for a loopback interface
ICTFBI 0:4edb816d21e1 83 *
ICTFBI 0:4edb816d21e1 84 * @param netif the lwip network interface structure for this loopif
ICTFBI 0:4edb816d21e1 85 * @return ERR_OK if the loopif is initialized
ICTFBI 0:4edb816d21e1 86 * ERR_MEM if private data couldn't be allocated
ICTFBI 0:4edb816d21e1 87 */
ICTFBI 0:4edb816d21e1 88 static err_t
ICTFBI 0:4edb816d21e1 89 netif_loopif_init(struct netif *netif)
ICTFBI 0:4edb816d21e1 90 {
ICTFBI 0:4edb816d21e1 91 /* initialize the snmp variables and counters inside the struct netif
ICTFBI 0:4edb816d21e1 92 * ifSpeed: no assumption can be made!
ICTFBI 0:4edb816d21e1 93 */
ICTFBI 0:4edb816d21e1 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
ICTFBI 0:4edb816d21e1 95
ICTFBI 0:4edb816d21e1 96 netif->name[0] = 'l';
ICTFBI 0:4edb816d21e1 97 netif->name[1] = 'o';
ICTFBI 0:4edb816d21e1 98 netif->output = netif_loop_output;
ICTFBI 0:4edb816d21e1 99 return ERR_OK;
ICTFBI 0:4edb816d21e1 100 }
ICTFBI 0:4edb816d21e1 101 #endif /* LWIP_HAVE_LOOPIF */
ICTFBI 0:4edb816d21e1 102
ICTFBI 0:4edb816d21e1 103 void
ICTFBI 0:4edb816d21e1 104 netif_init(void)
ICTFBI 0:4edb816d21e1 105 {
ICTFBI 0:4edb816d21e1 106 #if LWIP_HAVE_LOOPIF
ICTFBI 0:4edb816d21e1 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
ICTFBI 0:4edb816d21e1 108 IP4_ADDR(&loop_gw, 127,0,0,1);
ICTFBI 0:4edb816d21e1 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
ICTFBI 0:4edb816d21e1 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
ICTFBI 0:4edb816d21e1 111
ICTFBI 0:4edb816d21e1 112 #if NO_SYS
ICTFBI 0:4edb816d21e1 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
ICTFBI 0:4edb816d21e1 114 #else /* NO_SYS */
ICTFBI 0:4edb816d21e1 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
ICTFBI 0:4edb816d21e1 116 #endif /* NO_SYS */
ICTFBI 0:4edb816d21e1 117 netif_set_up(&loop_netif);
ICTFBI 0:4edb816d21e1 118
ICTFBI 0:4edb816d21e1 119 #endif /* LWIP_HAVE_LOOPIF */
ICTFBI 0:4edb816d21e1 120 }
ICTFBI 0:4edb816d21e1 121
ICTFBI 0:4edb816d21e1 122 /**
ICTFBI 0:4edb816d21e1 123 * Add a network interface to the list of lwIP netifs.
ICTFBI 0:4edb816d21e1 124 *
ICTFBI 0:4edb816d21e1 125 * @param netif a pre-allocated netif structure
ICTFBI 0:4edb816d21e1 126 * @param ipaddr IP address for the new netif
ICTFBI 0:4edb816d21e1 127 * @param netmask network mask for the new netif
ICTFBI 0:4edb816d21e1 128 * @param gw default gateway IP address for the new netif
ICTFBI 0:4edb816d21e1 129 * @param state opaque data passed to the new netif
ICTFBI 0:4edb816d21e1 130 * @param init callback function that initializes the interface
ICTFBI 0:4edb816d21e1 131 * @param input callback function that is called to pass
ICTFBI 0:4edb816d21e1 132 * ingress packets up in the protocol layer stack.
ICTFBI 0:4edb816d21e1 133 *
ICTFBI 0:4edb816d21e1 134 * @return netif, or NULL if failed.
ICTFBI 0:4edb816d21e1 135 */
ICTFBI 0:4edb816d21e1 136 struct netif *
ICTFBI 0:4edb816d21e1 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
ICTFBI 0:4edb816d21e1 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
ICTFBI 0:4edb816d21e1 139 {
ICTFBI 0:4edb816d21e1 140 static u8_t netifnum = 0;
ICTFBI 0:4edb816d21e1 141
ICTFBI 0:4edb816d21e1 142 LWIP_ASSERT("No init function given", init != NULL);
ICTFBI 0:4edb816d21e1 143
ICTFBI 0:4edb816d21e1 144 /* reset new interface configuration state */
ICTFBI 0:4edb816d21e1 145 ip_addr_set_zero(&netif->ip_addr);
ICTFBI 0:4edb816d21e1 146 ip_addr_set_zero(&netif->netmask);
ICTFBI 0:4edb816d21e1 147 ip_addr_set_zero(&netif->gw);
ICTFBI 0:4edb816d21e1 148 netif->flags = 0;
ICTFBI 0:4edb816d21e1 149 #if LWIP_DHCP
ICTFBI 0:4edb816d21e1 150 /* netif not under DHCP control by default */
ICTFBI 0:4edb816d21e1 151 netif->dhcp = NULL;
ICTFBI 0:4edb816d21e1 152 #endif /* LWIP_DHCP */
ICTFBI 0:4edb816d21e1 153 #if LWIP_AUTOIP
ICTFBI 0:4edb816d21e1 154 /* netif not under AutoIP control by default */
ICTFBI 0:4edb816d21e1 155 netif->autoip = NULL;
ICTFBI 0:4edb816d21e1 156 #endif /* LWIP_AUTOIP */
ICTFBI 0:4edb816d21e1 157 #if LWIP_NETIF_STATUS_CALLBACK
ICTFBI 0:4edb816d21e1 158 netif->status_callback = NULL;
ICTFBI 0:4edb816d21e1 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
ICTFBI 0:4edb816d21e1 160 #if LWIP_NETIF_LINK_CALLBACK
ICTFBI 0:4edb816d21e1 161 netif->link_callback = NULL;
ICTFBI 0:4edb816d21e1 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
ICTFBI 0:4edb816d21e1 163 #if LWIP_IGMP
ICTFBI 0:4edb816d21e1 164 netif->igmp_mac_filter = NULL;
ICTFBI 0:4edb816d21e1 165 #endif /* LWIP_IGMP */
ICTFBI 0:4edb816d21e1 166 #if ENABLE_LOOPBACK
ICTFBI 0:4edb816d21e1 167 netif->loop_first = NULL;
ICTFBI 0:4edb816d21e1 168 netif->loop_last = NULL;
ICTFBI 0:4edb816d21e1 169 #endif /* ENABLE_LOOPBACK */
ICTFBI 0:4edb816d21e1 170
ICTFBI 0:4edb816d21e1 171 /* remember netif specific state information data */
ICTFBI 0:4edb816d21e1 172 netif->state = state;
ICTFBI 0:4edb816d21e1 173 netif->num = netifnum++;
ICTFBI 0:4edb816d21e1 174 netif->input = input;
ICTFBI 0:4edb816d21e1 175 #if LWIP_NETIF_HWADDRHINT
ICTFBI 0:4edb816d21e1 176 netif->addr_hint = NULL;
ICTFBI 0:4edb816d21e1 177 #endif /* LWIP_NETIF_HWADDRHINT*/
ICTFBI 0:4edb816d21e1 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
ICTFBI 0:4edb816d21e1 179 netif->loop_cnt_current = 0;
ICTFBI 0:4edb816d21e1 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
ICTFBI 0:4edb816d21e1 181
ICTFBI 0:4edb816d21e1 182 netif_set_addr(netif, ipaddr, netmask, gw);
ICTFBI 0:4edb816d21e1 183
ICTFBI 0:4edb816d21e1 184 /* call user specified initialization function for netif */
ICTFBI 0:4edb816d21e1 185 if (init(netif) != ERR_OK) {
ICTFBI 0:4edb816d21e1 186 return NULL;
ICTFBI 0:4edb816d21e1 187 }
ICTFBI 0:4edb816d21e1 188
ICTFBI 0:4edb816d21e1 189 /* add this netif to the list */
ICTFBI 0:4edb816d21e1 190 netif->next = netif_list;
ICTFBI 0:4edb816d21e1 191 netif_list = netif;
ICTFBI 0:4edb816d21e1 192 snmp_inc_iflist();
ICTFBI 0:4edb816d21e1 193
ICTFBI 0:4edb816d21e1 194 #if LWIP_IGMP
ICTFBI 0:4edb816d21e1 195 /* start IGMP processing */
ICTFBI 0:4edb816d21e1 196 if (netif->flags & NETIF_FLAG_IGMP) {
ICTFBI 0:4edb816d21e1 197 igmp_start(netif);
ICTFBI 0:4edb816d21e1 198 }
ICTFBI 0:4edb816d21e1 199 #endif /* LWIP_IGMP */
ICTFBI 0:4edb816d21e1 200
ICTFBI 0:4edb816d21e1 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
ICTFBI 0:4edb816d21e1 202 netif->name[0], netif->name[1]));
ICTFBI 0:4edb816d21e1 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
ICTFBI 0:4edb816d21e1 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
ICTFBI 0:4edb816d21e1 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
ICTFBI 0:4edb816d21e1 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
ICTFBI 0:4edb816d21e1 207 ip_addr_debug_print(NETIF_DEBUG, gw);
ICTFBI 0:4edb816d21e1 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
ICTFBI 0:4edb816d21e1 209 return netif;
ICTFBI 0:4edb816d21e1 210 }
ICTFBI 0:4edb816d21e1 211
ICTFBI 0:4edb816d21e1 212 /**
ICTFBI 0:4edb816d21e1 213 * Change IP address configuration for a network interface (including netmask
ICTFBI 0:4edb816d21e1 214 * and default gateway).
ICTFBI 0:4edb816d21e1 215 *
ICTFBI 0:4edb816d21e1 216 * @param netif the network interface to change
ICTFBI 0:4edb816d21e1 217 * @param ipaddr the new IP address
ICTFBI 0:4edb816d21e1 218 * @param netmask the new netmask
ICTFBI 0:4edb816d21e1 219 * @param gw the new default gateway
ICTFBI 0:4edb816d21e1 220 */
ICTFBI 0:4edb816d21e1 221 void
ICTFBI 0:4edb816d21e1 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
ICTFBI 0:4edb816d21e1 223 ip_addr_t *gw)
ICTFBI 0:4edb816d21e1 224 {
ICTFBI 0:4edb816d21e1 225 netif_set_ipaddr(netif, ipaddr);
ICTFBI 0:4edb816d21e1 226 netif_set_netmask(netif, netmask);
ICTFBI 0:4edb816d21e1 227 netif_set_gw(netif, gw);
ICTFBI 0:4edb816d21e1 228 }
ICTFBI 0:4edb816d21e1 229
ICTFBI 0:4edb816d21e1 230 /**
ICTFBI 0:4edb816d21e1 231 * Remove a network interface from the list of lwIP netifs.
ICTFBI 0:4edb816d21e1 232 *
ICTFBI 0:4edb816d21e1 233 * @param netif the network interface to remove
ICTFBI 0:4edb816d21e1 234 */
ICTFBI 0:4edb816d21e1 235 void
ICTFBI 0:4edb816d21e1 236 netif_remove(struct netif *netif)
ICTFBI 0:4edb816d21e1 237 {
ICTFBI 0:4edb816d21e1 238 if (netif == NULL) {
ICTFBI 0:4edb816d21e1 239 return;
ICTFBI 0:4edb816d21e1 240 }
ICTFBI 0:4edb816d21e1 241
ICTFBI 0:4edb816d21e1 242 #if LWIP_IGMP
ICTFBI 0:4edb816d21e1 243 /* stop IGMP processing */
ICTFBI 0:4edb816d21e1 244 if (netif->flags & NETIF_FLAG_IGMP) {
ICTFBI 0:4edb816d21e1 245 igmp_stop(netif);
ICTFBI 0:4edb816d21e1 246 }
ICTFBI 0:4edb816d21e1 247 #endif /* LWIP_IGMP */
ICTFBI 0:4edb816d21e1 248 if (netif_is_up(netif)) {
ICTFBI 0:4edb816d21e1 249 /* set netif down before removing (call callback function) */
ICTFBI 0:4edb816d21e1 250 netif_set_down(netif);
ICTFBI 0:4edb816d21e1 251 }
ICTFBI 0:4edb816d21e1 252
ICTFBI 0:4edb816d21e1 253 snmp_delete_ipaddridx_tree(netif);
ICTFBI 0:4edb816d21e1 254
ICTFBI 0:4edb816d21e1 255 /* is it the first netif? */
ICTFBI 0:4edb816d21e1 256 if (netif_list == netif) {
ICTFBI 0:4edb816d21e1 257 netif_list = netif->next;
ICTFBI 0:4edb816d21e1 258 } else {
ICTFBI 0:4edb816d21e1 259 /* look for netif further down the list */
ICTFBI 0:4edb816d21e1 260 struct netif * tmpNetif;
ICTFBI 0:4edb816d21e1 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
ICTFBI 0:4edb816d21e1 262 if (tmpNetif->next == netif) {
ICTFBI 0:4edb816d21e1 263 tmpNetif->next = netif->next;
ICTFBI 0:4edb816d21e1 264 break;
ICTFBI 0:4edb816d21e1 265 }
ICTFBI 0:4edb816d21e1 266 }
ICTFBI 0:4edb816d21e1 267 if (tmpNetif == NULL)
ICTFBI 0:4edb816d21e1 268 return; /* we didn't find any netif today */
ICTFBI 0:4edb816d21e1 269 }
ICTFBI 0:4edb816d21e1 270 snmp_dec_iflist();
ICTFBI 0:4edb816d21e1 271 /* this netif is default? */
ICTFBI 0:4edb816d21e1 272 if (netif_default == netif) {
ICTFBI 0:4edb816d21e1 273 /* reset default netif */
ICTFBI 0:4edb816d21e1 274 netif_set_default(NULL);
ICTFBI 0:4edb816d21e1 275 }
ICTFBI 0:4edb816d21e1 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
ICTFBI 0:4edb816d21e1 277 }
ICTFBI 0:4edb816d21e1 278
ICTFBI 0:4edb816d21e1 279 /**
ICTFBI 0:4edb816d21e1 280 * Find a network interface by searching for its name
ICTFBI 0:4edb816d21e1 281 *
ICTFBI 0:4edb816d21e1 282 * @param name the name of the netif (like netif->name) plus concatenated number
ICTFBI 0:4edb816d21e1 283 * in ascii representation (e.g. 'en0')
ICTFBI 0:4edb816d21e1 284 */
ICTFBI 0:4edb816d21e1 285 struct netif *
ICTFBI 0:4edb816d21e1 286 netif_find(char *name)
ICTFBI 0:4edb816d21e1 287 {
ICTFBI 0:4edb816d21e1 288 struct netif *netif;
ICTFBI 0:4edb816d21e1 289 u8_t num;
ICTFBI 0:4edb816d21e1 290
ICTFBI 0:4edb816d21e1 291 if (name == NULL) {
ICTFBI 0:4edb816d21e1 292 return NULL;
ICTFBI 0:4edb816d21e1 293 }
ICTFBI 0:4edb816d21e1 294
ICTFBI 0:4edb816d21e1 295 num = name[2] - '0';
ICTFBI 0:4edb816d21e1 296
ICTFBI 0:4edb816d21e1 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
ICTFBI 0:4edb816d21e1 298 if (num == netif->num &&
ICTFBI 0:4edb816d21e1 299 name[0] == netif->name[0] &&
ICTFBI 0:4edb816d21e1 300 name[1] == netif->name[1]) {
ICTFBI 0:4edb816d21e1 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
ICTFBI 0:4edb816d21e1 302 return netif;
ICTFBI 0:4edb816d21e1 303 }
ICTFBI 0:4edb816d21e1 304 }
ICTFBI 0:4edb816d21e1 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
ICTFBI 0:4edb816d21e1 306 return NULL;
ICTFBI 0:4edb816d21e1 307 }
ICTFBI 0:4edb816d21e1 308
ICTFBI 0:4edb816d21e1 309 /**
ICTFBI 0:4edb816d21e1 310 * Change the IP address of a network interface
ICTFBI 0:4edb816d21e1 311 *
ICTFBI 0:4edb816d21e1 312 * @param netif the network interface to change
ICTFBI 0:4edb816d21e1 313 * @param ipaddr the new IP address
ICTFBI 0:4edb816d21e1 314 *
ICTFBI 0:4edb816d21e1 315 * @note call netif_set_addr() if you also want to change netmask and
ICTFBI 0:4edb816d21e1 316 * default gateway
ICTFBI 0:4edb816d21e1 317 */
ICTFBI 0:4edb816d21e1 318 void
ICTFBI 0:4edb816d21e1 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
ICTFBI 0:4edb816d21e1 320 {
ICTFBI 0:4edb816d21e1 321 /* TODO: Handling of obsolete pcbs */
ICTFBI 0:4edb816d21e1 322 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
ICTFBI 0:4edb816d21e1 323 #if LWIP_TCP
ICTFBI 0:4edb816d21e1 324 struct tcp_pcb *pcb;
ICTFBI 0:4edb816d21e1 325 struct tcp_pcb_listen *lpcb;
ICTFBI 0:4edb816d21e1 326
ICTFBI 0:4edb816d21e1 327 /* address is actually being changed? */
ICTFBI 0:4edb816d21e1 328 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
ICTFBI 0:4edb816d21e1 329 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
ICTFBI 0:4edb816d21e1 330 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
ICTFBI 0:4edb816d21e1 331 pcb = tcp_active_pcbs;
ICTFBI 0:4edb816d21e1 332 while (pcb != NULL) {
ICTFBI 0:4edb816d21e1 333 /* PCB bound to current local interface address? */
ICTFBI 0:4edb816d21e1 334 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
ICTFBI 0:4edb816d21e1 335 #if LWIP_AUTOIP
ICTFBI 0:4edb816d21e1 336 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
ICTFBI 0:4edb816d21e1 337 && !ip_addr_islinklocal(&(pcb->local_ip))
ICTFBI 0:4edb816d21e1 338 #endif /* LWIP_AUTOIP */
ICTFBI 0:4edb816d21e1 339 ) {
ICTFBI 0:4edb816d21e1 340 /* this connection must be aborted */
ICTFBI 0:4edb816d21e1 341 struct tcp_pcb *next = pcb->next;
ICTFBI 0:4edb816d21e1 342 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
ICTFBI 0:4edb816d21e1 343 tcp_abort(pcb);
ICTFBI 0:4edb816d21e1 344 pcb = next;
ICTFBI 0:4edb816d21e1 345 } else {
ICTFBI 0:4edb816d21e1 346 pcb = pcb->next;
ICTFBI 0:4edb816d21e1 347 }
ICTFBI 0:4edb816d21e1 348 }
ICTFBI 0:4edb816d21e1 349 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
ICTFBI 0:4edb816d21e1 350 /* PCB bound to current local interface address? */
ICTFBI 0:4edb816d21e1 351 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
ICTFBI 0:4edb816d21e1 352 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
ICTFBI 0:4edb816d21e1 353 /* The PCB is listening to the old ipaddr and
ICTFBI 0:4edb816d21e1 354 * is set to listen to the new one instead */
ICTFBI 0:4edb816d21e1 355 ip_addr_set(&(lpcb->local_ip), ipaddr);
ICTFBI 0:4edb816d21e1 356 }
ICTFBI 0:4edb816d21e1 357 }
ICTFBI 0:4edb816d21e1 358 }
ICTFBI 0:4edb816d21e1 359 #endif
ICTFBI 0:4edb816d21e1 360 snmp_delete_ipaddridx_tree(netif);
ICTFBI 0:4edb816d21e1 361 snmp_delete_iprteidx_tree(0,netif);
ICTFBI 0:4edb816d21e1 362 /* set new IP address to netif */
ICTFBI 0:4edb816d21e1 363 ip_addr_set(&(netif->ip_addr), ipaddr);
ICTFBI 0:4edb816d21e1 364 snmp_insert_ipaddridx_tree(netif);
ICTFBI 0:4edb816d21e1 365 snmp_insert_iprteidx_tree(0,netif);
ICTFBI 0:4edb816d21e1 366
ICTFBI 0:4edb816d21e1 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",
ICTFBI 0:4edb816d21e1 368 netif->name[0], netif->name[1],
ICTFBI 0:4edb816d21e1 369 ip4_addr1_16(&netif->ip_addr),
ICTFBI 0:4edb816d21e1 370 ip4_addr2_16(&netif->ip_addr),
ICTFBI 0:4edb816d21e1 371 ip4_addr3_16(&netif->ip_addr),
ICTFBI 0:4edb816d21e1 372 ip4_addr4_16(&netif->ip_addr)));
ICTFBI 0:4edb816d21e1 373 }
ICTFBI 0:4edb816d21e1 374
ICTFBI 0:4edb816d21e1 375 /**
ICTFBI 0:4edb816d21e1 376 * Change the default gateway for a network interface
ICTFBI 0:4edb816d21e1 377 *
ICTFBI 0:4edb816d21e1 378 * @param netif the network interface to change
ICTFBI 0:4edb816d21e1 379 * @param gw the new default gateway
ICTFBI 0:4edb816d21e1 380 *
ICTFBI 0:4edb816d21e1 381 * @note call netif_set_addr() if you also want to change ip address and netmask
ICTFBI 0:4edb816d21e1 382 */
ICTFBI 0:4edb816d21e1 383 void
ICTFBI 0:4edb816d21e1 384 netif_set_gw(struct netif *netif, ip_addr_t *gw)
ICTFBI 0:4edb816d21e1 385 {
ICTFBI 0:4edb816d21e1 386 ip_addr_set(&(netif->gw), gw);
ICTFBI 0:4edb816d21e1 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",
ICTFBI 0:4edb816d21e1 388 netif->name[0], netif->name[1],
ICTFBI 0:4edb816d21e1 389 ip4_addr1_16(&netif->gw),
ICTFBI 0:4edb816d21e1 390 ip4_addr2_16(&netif->gw),
ICTFBI 0:4edb816d21e1 391 ip4_addr3_16(&netif->gw),
ICTFBI 0:4edb816d21e1 392 ip4_addr4_16(&netif->gw)));
ICTFBI 0:4edb816d21e1 393 }
ICTFBI 0:4edb816d21e1 394
ICTFBI 0:4edb816d21e1 395 /**
ICTFBI 0:4edb816d21e1 396 * Change the netmask of a network interface
ICTFBI 0:4edb816d21e1 397 *
ICTFBI 0:4edb816d21e1 398 * @param netif the network interface to change
ICTFBI 0:4edb816d21e1 399 * @param netmask the new netmask
ICTFBI 0:4edb816d21e1 400 *
ICTFBI 0:4edb816d21e1 401 * @note call netif_set_addr() if you also want to change ip address and
ICTFBI 0:4edb816d21e1 402 * default gateway
ICTFBI 0:4edb816d21e1 403 */
ICTFBI 0:4edb816d21e1 404 void
ICTFBI 0:4edb816d21e1 405 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
ICTFBI 0:4edb816d21e1 406 {
ICTFBI 0:4edb816d21e1 407 snmp_delete_iprteidx_tree(0, netif);
ICTFBI 0:4edb816d21e1 408 /* set new netmask to netif */
ICTFBI 0:4edb816d21e1 409 ip_addr_set(&(netif->netmask), netmask);
ICTFBI 0:4edb816d21e1 410 snmp_insert_iprteidx_tree(0, netif);
ICTFBI 0:4edb816d21e1 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",
ICTFBI 0:4edb816d21e1 412 netif->name[0], netif->name[1],
ICTFBI 0:4edb816d21e1 413 ip4_addr1_16(&netif->netmask),
ICTFBI 0:4edb816d21e1 414 ip4_addr2_16(&netif->netmask),
ICTFBI 0:4edb816d21e1 415 ip4_addr3_16(&netif->netmask),
ICTFBI 0:4edb816d21e1 416 ip4_addr4_16(&netif->netmask)));
ICTFBI 0:4edb816d21e1 417 }
ICTFBI 0:4edb816d21e1 418
ICTFBI 0:4edb816d21e1 419 /**
ICTFBI 0:4edb816d21e1 420 * Set a network interface as the default network interface
ICTFBI 0:4edb816d21e1 421 * (used to output all packets for which no specific route is found)
ICTFBI 0:4edb816d21e1 422 *
ICTFBI 0:4edb816d21e1 423 * @param netif the default network interface
ICTFBI 0:4edb816d21e1 424 */
ICTFBI 0:4edb816d21e1 425 void
ICTFBI 0:4edb816d21e1 426 netif_set_default(struct netif *netif)
ICTFBI 0:4edb816d21e1 427 {
ICTFBI 0:4edb816d21e1 428 if (netif == NULL) {
ICTFBI 0:4edb816d21e1 429 /* remove default route */
ICTFBI 0:4edb816d21e1 430 snmp_delete_iprteidx_tree(1, netif);
ICTFBI 0:4edb816d21e1 431 } else {
ICTFBI 0:4edb816d21e1 432 /* install default route */
ICTFBI 0:4edb816d21e1 433 snmp_insert_iprteidx_tree(1, netif);
ICTFBI 0:4edb816d21e1 434 }
ICTFBI 0:4edb816d21e1 435 netif_default = netif;
ICTFBI 0:4edb816d21e1 436 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
ICTFBI 0:4edb816d21e1 437 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
ICTFBI 0:4edb816d21e1 438 }
ICTFBI 0:4edb816d21e1 439
ICTFBI 0:4edb816d21e1 440 /**
ICTFBI 0:4edb816d21e1 441 * Bring an interface up, available for processing
ICTFBI 0:4edb816d21e1 442 * traffic.
ICTFBI 0:4edb816d21e1 443 *
ICTFBI 0:4edb816d21e1 444 * @note: Enabling DHCP on a down interface will make it come
ICTFBI 0:4edb816d21e1 445 * up once configured.
ICTFBI 0:4edb816d21e1 446 *
ICTFBI 0:4edb816d21e1 447 * @see dhcp_start()
ICTFBI 0:4edb816d21e1 448 */
ICTFBI 0:4edb816d21e1 449 void netif_set_up(struct netif *netif)
ICTFBI 0:4edb816d21e1 450 {
ICTFBI 0:4edb816d21e1 451 if (!(netif->flags & NETIF_FLAG_UP)) {
ICTFBI 0:4edb816d21e1 452 netif->flags |= NETIF_FLAG_UP;
ICTFBI 0:4edb816d21e1 453
ICTFBI 0:4edb816d21e1 454 #if LWIP_SNMP
ICTFBI 0:4edb816d21e1 455 snmp_get_sysuptime(&netif->ts);
ICTFBI 0:4edb816d21e1 456 #endif /* LWIP_SNMP */
ICTFBI 0:4edb816d21e1 457
ICTFBI 0:4edb816d21e1 458 NETIF_STATUS_CALLBACK(netif);
ICTFBI 0:4edb816d21e1 459
ICTFBI 0:4edb816d21e1 460 if (netif->flags & NETIF_FLAG_LINK_UP) {
ICTFBI 0:4edb816d21e1 461 #if LWIP_ARP
ICTFBI 0:4edb816d21e1 462 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
ICTFBI 0:4edb816d21e1 463 if (netif->flags & (NETIF_FLAG_ETHARP)) {
ICTFBI 0:4edb816d21e1 464 etharp_gratuitous(netif);
ICTFBI 0:4edb816d21e1 465 }
ICTFBI 0:4edb816d21e1 466 #endif /* LWIP_ARP */
ICTFBI 0:4edb816d21e1 467
ICTFBI 0:4edb816d21e1 468 #if LWIP_IGMP
ICTFBI 0:4edb816d21e1 469 /* resend IGMP memberships */
ICTFBI 0:4edb816d21e1 470 if (netif->flags & NETIF_FLAG_IGMP) {
ICTFBI 0:4edb816d21e1 471 igmp_report_groups( netif);
ICTFBI 0:4edb816d21e1 472 }
ICTFBI 0:4edb816d21e1 473 #endif /* LWIP_IGMP */
ICTFBI 0:4edb816d21e1 474 }
ICTFBI 0:4edb816d21e1 475 }
ICTFBI 0:4edb816d21e1 476 }
ICTFBI 0:4edb816d21e1 477
ICTFBI 0:4edb816d21e1 478 /**
ICTFBI 0:4edb816d21e1 479 * Bring an interface down, disabling any traffic processing.
ICTFBI 0:4edb816d21e1 480 *
ICTFBI 0:4edb816d21e1 481 * @note: Enabling DHCP on a down interface will make it come
ICTFBI 0:4edb816d21e1 482 * up once configured.
ICTFBI 0:4edb816d21e1 483 *
ICTFBI 0:4edb816d21e1 484 * @see dhcp_start()
ICTFBI 0:4edb816d21e1 485 */
ICTFBI 0:4edb816d21e1 486 void netif_set_down(struct netif *netif)
ICTFBI 0:4edb816d21e1 487 {
ICTFBI 0:4edb816d21e1 488 if (netif->flags & NETIF_FLAG_UP) {
ICTFBI 0:4edb816d21e1 489 netif->flags &= ~NETIF_FLAG_UP;
ICTFBI 0:4edb816d21e1 490 #if LWIP_SNMP
ICTFBI 0:4edb816d21e1 491 snmp_get_sysuptime(&netif->ts);
ICTFBI 0:4edb816d21e1 492 #endif
ICTFBI 0:4edb816d21e1 493
ICTFBI 0:4edb816d21e1 494 NETIF_STATUS_CALLBACK(netif);
ICTFBI 0:4edb816d21e1 495 }
ICTFBI 0:4edb816d21e1 496 }
ICTFBI 0:4edb816d21e1 497
ICTFBI 0:4edb816d21e1 498 #if LWIP_NETIF_STATUS_CALLBACK
ICTFBI 0:4edb816d21e1 499 /**
ICTFBI 0:4edb816d21e1 500 * Set callback to be called when interface is brought up/down
ICTFBI 0:4edb816d21e1 501 */
ICTFBI 0:4edb816d21e1 502 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
ICTFBI 0:4edb816d21e1 503 {
ICTFBI 0:4edb816d21e1 504 if (netif) {
ICTFBI 0:4edb816d21e1 505 netif->status_callback = status_callback;
ICTFBI 0:4edb816d21e1 506 }
ICTFBI 0:4edb816d21e1 507 }
ICTFBI 0:4edb816d21e1 508 #endif /* LWIP_NETIF_STATUS_CALLBACK */
ICTFBI 0:4edb816d21e1 509
ICTFBI 0:4edb816d21e1 510 /**
ICTFBI 0:4edb816d21e1 511 * Called by a driver when its link goes up
ICTFBI 0:4edb816d21e1 512 */
ICTFBI 0:4edb816d21e1 513 void netif_set_link_up(struct netif *netif )
ICTFBI 0:4edb816d21e1 514 {
ICTFBI 0:4edb816d21e1 515 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
ICTFBI 0:4edb816d21e1 516 netif->flags |= NETIF_FLAG_LINK_UP;
ICTFBI 0:4edb816d21e1 517
ICTFBI 0:4edb816d21e1 518 #if LWIP_DHCP
ICTFBI 0:4edb816d21e1 519 if (netif->dhcp) {
ICTFBI 0:4edb816d21e1 520 dhcp_network_changed(netif);
ICTFBI 0:4edb816d21e1 521 }
ICTFBI 0:4edb816d21e1 522 #endif /* LWIP_DHCP */
ICTFBI 0:4edb816d21e1 523
ICTFBI 0:4edb816d21e1 524 #if LWIP_AUTOIP
ICTFBI 0:4edb816d21e1 525 if (netif->autoip) {
ICTFBI 0:4edb816d21e1 526 autoip_network_changed(netif);
ICTFBI 0:4edb816d21e1 527 }
ICTFBI 0:4edb816d21e1 528 #endif /* LWIP_AUTOIP */
ICTFBI 0:4edb816d21e1 529
ICTFBI 0:4edb816d21e1 530 if (netif->flags & NETIF_FLAG_UP) {
ICTFBI 0:4edb816d21e1 531 #if LWIP_ARP
ICTFBI 0:4edb816d21e1 532 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
ICTFBI 0:4edb816d21e1 533 if (netif->flags & NETIF_FLAG_ETHARP) {
ICTFBI 0:4edb816d21e1 534 etharp_gratuitous(netif);
ICTFBI 0:4edb816d21e1 535 }
ICTFBI 0:4edb816d21e1 536 #endif /* LWIP_ARP */
ICTFBI 0:4edb816d21e1 537
ICTFBI 0:4edb816d21e1 538 #if LWIP_IGMP
ICTFBI 0:4edb816d21e1 539 /* resend IGMP memberships */
ICTFBI 0:4edb816d21e1 540 if (netif->flags & NETIF_FLAG_IGMP) {
ICTFBI 0:4edb816d21e1 541 igmp_report_groups( netif);
ICTFBI 0:4edb816d21e1 542 }
ICTFBI 0:4edb816d21e1 543 #endif /* LWIP_IGMP */
ICTFBI 0:4edb816d21e1 544 }
ICTFBI 0:4edb816d21e1 545 NETIF_LINK_CALLBACK(netif);
ICTFBI 0:4edb816d21e1 546 }
ICTFBI 0:4edb816d21e1 547 }
ICTFBI 0:4edb816d21e1 548
ICTFBI 0:4edb816d21e1 549 /**
ICTFBI 0:4edb816d21e1 550 * Called by a driver when its link goes down
ICTFBI 0:4edb816d21e1 551 */
ICTFBI 0:4edb816d21e1 552 void netif_set_link_down(struct netif *netif )
ICTFBI 0:4edb816d21e1 553 {
ICTFBI 0:4edb816d21e1 554 if (netif->flags & NETIF_FLAG_LINK_UP) {
ICTFBI 0:4edb816d21e1 555 netif->flags &= ~NETIF_FLAG_LINK_UP;
ICTFBI 0:4edb816d21e1 556 NETIF_LINK_CALLBACK(netif);
ICTFBI 0:4edb816d21e1 557 }
ICTFBI 0:4edb816d21e1 558 }
ICTFBI 0:4edb816d21e1 559
ICTFBI 0:4edb816d21e1 560 #if LWIP_NETIF_LINK_CALLBACK
ICTFBI 0:4edb816d21e1 561 /**
ICTFBI 0:4edb816d21e1 562 * Set callback to be called when link is brought up/down
ICTFBI 0:4edb816d21e1 563 */
ICTFBI 0:4edb816d21e1 564 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
ICTFBI 0:4edb816d21e1 565 {
ICTFBI 0:4edb816d21e1 566 if (netif) {
ICTFBI 0:4edb816d21e1 567 netif->link_callback = link_callback;
ICTFBI 0:4edb816d21e1 568 }
ICTFBI 0:4edb816d21e1 569 }
ICTFBI 0:4edb816d21e1 570 #endif /* LWIP_NETIF_LINK_CALLBACK */
ICTFBI 0:4edb816d21e1 571
ICTFBI 0:4edb816d21e1 572 #if ENABLE_LOOPBACK
ICTFBI 0:4edb816d21e1 573 /**
ICTFBI 0:4edb816d21e1 574 * Send an IP packet to be received on the same netif (loopif-like).
ICTFBI 0:4edb816d21e1 575 * The pbuf is simply copied and handed back to netif->input.
ICTFBI 0:4edb816d21e1 576 * In multithreaded mode, this is done directly since netif->input must put
ICTFBI 0:4edb816d21e1 577 * the packet on a queue.
ICTFBI 0:4edb816d21e1 578 * In callback mode, the packet is put on an internal queue and is fed to
ICTFBI 0:4edb816d21e1 579 * netif->input by netif_poll().
ICTFBI 0:4edb816d21e1 580 *
ICTFBI 0:4edb816d21e1 581 * @param netif the lwip network interface structure
ICTFBI 0:4edb816d21e1 582 * @param p the (IP) packet to 'send'
ICTFBI 0:4edb816d21e1 583 * @param ipaddr the ip address to send the packet to (not used)
ICTFBI 0:4edb816d21e1 584 * @return ERR_OK if the packet has been sent
ICTFBI 0:4edb816d21e1 585 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
ICTFBI 0:4edb816d21e1 586 */
ICTFBI 0:4edb816d21e1 587 err_t
ICTFBI 0:4edb816d21e1 588 netif_loop_output(struct netif *netif, struct pbuf *p,
ICTFBI 0:4edb816d21e1 589 ip_addr_t *ipaddr)
ICTFBI 0:4edb816d21e1 590 {
ICTFBI 0:4edb816d21e1 591 struct pbuf *r;
ICTFBI 0:4edb816d21e1 592 err_t err;
ICTFBI 0:4edb816d21e1 593 struct pbuf *last;
ICTFBI 0:4edb816d21e1 594 #if LWIP_LOOPBACK_MAX_PBUFS
ICTFBI 0:4edb816d21e1 595 u8_t clen = 0;
ICTFBI 0:4edb816d21e1 596 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
ICTFBI 0:4edb816d21e1 597 /* If we have a loopif, SNMP counters are adjusted for it,
ICTFBI 0:4edb816d21e1 598 * if not they are adjusted for 'netif'. */
ICTFBI 0:4edb816d21e1 599 #if LWIP_SNMP
ICTFBI 0:4edb816d21e1 600 #if LWIP_HAVE_LOOPIF
ICTFBI 0:4edb816d21e1 601 struct netif *stats_if = &loop_netif;
ICTFBI 0:4edb816d21e1 602 #else /* LWIP_HAVE_LOOPIF */
ICTFBI 0:4edb816d21e1 603 struct netif *stats_if = netif;
ICTFBI 0:4edb816d21e1 604 #endif /* LWIP_HAVE_LOOPIF */
ICTFBI 0:4edb816d21e1 605 #endif /* LWIP_SNMP */
ICTFBI 0:4edb816d21e1 606 SYS_ARCH_DECL_PROTECT(lev);
ICTFBI 0:4edb816d21e1 607 LWIP_UNUSED_ARG(ipaddr);
ICTFBI 0:4edb816d21e1 608
ICTFBI 0:4edb816d21e1 609 /* Allocate a new pbuf */
ICTFBI 0:4edb816d21e1 610 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
ICTFBI 0:4edb816d21e1 611 if (r == NULL) {
ICTFBI 0:4edb816d21e1 612 LINK_STATS_INC(link.memerr);
ICTFBI 0:4edb816d21e1 613 LINK_STATS_INC(link.drop);
ICTFBI 0:4edb816d21e1 614 snmp_inc_ifoutdiscards(stats_if);
ICTFBI 0:4edb816d21e1 615 return ERR_MEM;
ICTFBI 0:4edb816d21e1 616 }
ICTFBI 0:4edb816d21e1 617 #if LWIP_LOOPBACK_MAX_PBUFS
ICTFBI 0:4edb816d21e1 618 clen = pbuf_clen(r);
ICTFBI 0:4edb816d21e1 619 /* check for overflow or too many pbuf on queue */
ICTFBI 0:4edb816d21e1 620 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
ICTFBI 0:4edb816d21e1 621 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
ICTFBI 0:4edb816d21e1 622 pbuf_free(r);
ICTFBI 0:4edb816d21e1 623 LINK_STATS_INC(link.memerr);
ICTFBI 0:4edb816d21e1 624 LINK_STATS_INC(link.drop);
ICTFBI 0:4edb816d21e1 625 snmp_inc_ifoutdiscards(stats_if);
ICTFBI 0:4edb816d21e1 626 return ERR_MEM;
ICTFBI 0:4edb816d21e1 627 }
ICTFBI 0:4edb816d21e1 628 netif->loop_cnt_current += clen;
ICTFBI 0:4edb816d21e1 629 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
ICTFBI 0:4edb816d21e1 630
ICTFBI 0:4edb816d21e1 631 /* Copy the whole pbuf queue p into the single pbuf r */
ICTFBI 0:4edb816d21e1 632 if ((err = pbuf_copy(r, p)) != ERR_OK) {
ICTFBI 0:4edb816d21e1 633 pbuf_free(r);
ICTFBI 0:4edb816d21e1 634 LINK_STATS_INC(link.memerr);
ICTFBI 0:4edb816d21e1 635 LINK_STATS_INC(link.drop);
ICTFBI 0:4edb816d21e1 636 snmp_inc_ifoutdiscards(stats_if);
ICTFBI 0:4edb816d21e1 637 return err;
ICTFBI 0:4edb816d21e1 638 }
ICTFBI 0:4edb816d21e1 639
ICTFBI 0:4edb816d21e1 640 /* Put the packet on a linked list which gets emptied through calling
ICTFBI 0:4edb816d21e1 641 netif_poll(). */
ICTFBI 0:4edb816d21e1 642
ICTFBI 0:4edb816d21e1 643 /* let last point to the last pbuf in chain r */
ICTFBI 0:4edb816d21e1 644 for (last = r; last->next != NULL; last = last->next);
ICTFBI 0:4edb816d21e1 645
ICTFBI 0:4edb816d21e1 646 SYS_ARCH_PROTECT(lev);
ICTFBI 0:4edb816d21e1 647 if(netif->loop_first != NULL) {
ICTFBI 0:4edb816d21e1 648 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
ICTFBI 0:4edb816d21e1 649 netif->loop_last->next = r;
ICTFBI 0:4edb816d21e1 650 netif->loop_last = last;
ICTFBI 0:4edb816d21e1 651 } else {
ICTFBI 0:4edb816d21e1 652 netif->loop_first = r;
ICTFBI 0:4edb816d21e1 653 netif->loop_last = last;
ICTFBI 0:4edb816d21e1 654 }
ICTFBI 0:4edb816d21e1 655 SYS_ARCH_UNPROTECT(lev);
ICTFBI 0:4edb816d21e1 656
ICTFBI 0:4edb816d21e1 657 LINK_STATS_INC(link.xmit);
ICTFBI 0:4edb816d21e1 658 snmp_add_ifoutoctets(stats_if, p->tot_len);
ICTFBI 0:4edb816d21e1 659 snmp_inc_ifoutucastpkts(stats_if);
ICTFBI 0:4edb816d21e1 660
ICTFBI 0:4edb816d21e1 661 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
ICTFBI 0:4edb816d21e1 662 /* For multithreading environment, schedule a call to netif_poll */
ICTFBI 0:4edb816d21e1 663 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
ICTFBI 0:4edb816d21e1 664 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
ICTFBI 0:4edb816d21e1 665
ICTFBI 0:4edb816d21e1 666 return ERR_OK;
ICTFBI 0:4edb816d21e1 667 }
ICTFBI 0:4edb816d21e1 668
ICTFBI 0:4edb816d21e1 669 /**
ICTFBI 0:4edb816d21e1 670 * Call netif_poll() in the main loop of your application. This is to prevent
ICTFBI 0:4edb816d21e1 671 * reentering non-reentrant functions like tcp_input(). Packets passed to
ICTFBI 0:4edb816d21e1 672 * netif_loop_output() are put on a list that is passed to netif->input() by
ICTFBI 0:4edb816d21e1 673 * netif_poll().
ICTFBI 0:4edb816d21e1 674 */
ICTFBI 0:4edb816d21e1 675 void
ICTFBI 0:4edb816d21e1 676 netif_poll(struct netif *netif)
ICTFBI 0:4edb816d21e1 677 {
ICTFBI 0:4edb816d21e1 678 struct pbuf *in;
ICTFBI 0:4edb816d21e1 679 /* If we have a loopif, SNMP counters are adjusted for it,
ICTFBI 0:4edb816d21e1 680 * if not they are adjusted for 'netif'. */
ICTFBI 0:4edb816d21e1 681 #if LWIP_SNMP
ICTFBI 0:4edb816d21e1 682 #if LWIP_HAVE_LOOPIF
ICTFBI 0:4edb816d21e1 683 struct netif *stats_if = &loop_netif;
ICTFBI 0:4edb816d21e1 684 #else /* LWIP_HAVE_LOOPIF */
ICTFBI 0:4edb816d21e1 685 struct netif *stats_if = netif;
ICTFBI 0:4edb816d21e1 686 #endif /* LWIP_HAVE_LOOPIF */
ICTFBI 0:4edb816d21e1 687 #endif /* LWIP_SNMP */
ICTFBI 0:4edb816d21e1 688 SYS_ARCH_DECL_PROTECT(lev);
ICTFBI 0:4edb816d21e1 689
ICTFBI 0:4edb816d21e1 690 do {
ICTFBI 0:4edb816d21e1 691 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
ICTFBI 0:4edb816d21e1 692 SYS_ARCH_PROTECT(lev);
ICTFBI 0:4edb816d21e1 693 in = netif->loop_first;
ICTFBI 0:4edb816d21e1 694 if (in != NULL) {
ICTFBI 0:4edb816d21e1 695 struct pbuf *in_end = in;
ICTFBI 0:4edb816d21e1 696 #if LWIP_LOOPBACK_MAX_PBUFS
ICTFBI 0:4edb816d21e1 697 u8_t clen = pbuf_clen(in);
ICTFBI 0:4edb816d21e1 698 /* adjust the number of pbufs on queue */
ICTFBI 0:4edb816d21e1 699 LWIP_ASSERT("netif->loop_cnt_current underflow",
ICTFBI 0:4edb816d21e1 700 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
ICTFBI 0:4edb816d21e1 701 netif->loop_cnt_current -= clen;
ICTFBI 0:4edb816d21e1 702 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
ICTFBI 0:4edb816d21e1 703 while (in_end->len != in_end->tot_len) {
ICTFBI 0:4edb816d21e1 704 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
ICTFBI 0:4edb816d21e1 705 in_end = in_end->next;
ICTFBI 0:4edb816d21e1 706 }
ICTFBI 0:4edb816d21e1 707 /* 'in_end' now points to the last pbuf from 'in' */
ICTFBI 0:4edb816d21e1 708 if (in_end == netif->loop_last) {
ICTFBI 0:4edb816d21e1 709 /* this was the last pbuf in the list */
ICTFBI 0:4edb816d21e1 710 netif->loop_first = netif->loop_last = NULL;
ICTFBI 0:4edb816d21e1 711 } else {
ICTFBI 0:4edb816d21e1 712 /* pop the pbuf off the list */
ICTFBI 0:4edb816d21e1 713 netif->loop_first = in_end->next;
ICTFBI 0:4edb816d21e1 714 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
ICTFBI 0:4edb816d21e1 715 }
ICTFBI 0:4edb816d21e1 716 /* De-queue the pbuf from its successors on the 'loop_' list. */
ICTFBI 0:4edb816d21e1 717 in_end->next = NULL;
ICTFBI 0:4edb816d21e1 718 }
ICTFBI 0:4edb816d21e1 719 SYS_ARCH_UNPROTECT(lev);
ICTFBI 0:4edb816d21e1 720
ICTFBI 0:4edb816d21e1 721 if (in != NULL) {
ICTFBI 0:4edb816d21e1 722 LINK_STATS_INC(link.recv);
ICTFBI 0:4edb816d21e1 723 snmp_add_ifinoctets(stats_if, in->tot_len);
ICTFBI 0:4edb816d21e1 724 snmp_inc_ifinucastpkts(stats_if);
ICTFBI 0:4edb816d21e1 725 /* loopback packets are always IP packets! */
ICTFBI 0:4edb816d21e1 726 if (ip_input(in, netif) != ERR_OK) {
ICTFBI 0:4edb816d21e1 727 pbuf_free(in);
ICTFBI 0:4edb816d21e1 728 }
ICTFBI 0:4edb816d21e1 729 /* Don't reference the packet any more! */
ICTFBI 0:4edb816d21e1 730 in = NULL;
ICTFBI 0:4edb816d21e1 731 }
ICTFBI 0:4edb816d21e1 732 /* go on while there is a packet on the list */
ICTFBI 0:4edb816d21e1 733 } while (netif->loop_first != NULL);
ICTFBI 0:4edb816d21e1 734 }
ICTFBI 0:4edb816d21e1 735
ICTFBI 0:4edb816d21e1 736 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
ICTFBI 0:4edb816d21e1 737 /**
ICTFBI 0:4edb816d21e1 738 * Calls netif_poll() for every netif on the netif_list.
ICTFBI 0:4edb816d21e1 739 */
ICTFBI 0:4edb816d21e1 740 void
ICTFBI 0:4edb816d21e1 741 netif_poll_all(void)
ICTFBI 0:4edb816d21e1 742 {
ICTFBI 0:4edb816d21e1 743 struct netif *netif = netif_list;
ICTFBI 0:4edb816d21e1 744 /* loop through netifs */
ICTFBI 0:4edb816d21e1 745 while (netif != NULL) {
ICTFBI 0:4edb816d21e1 746 netif_poll(netif);
ICTFBI 0:4edb816d21e1 747 /* proceed to next network interface */
ICTFBI 0:4edb816d21e1 748 netif = netif->next;
ICTFBI 0:4edb816d21e1 749 }
ICTFBI 0:4edb816d21e1 750 }
ICTFBI 0:4edb816d21e1 751 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
ICTFBI 0:4edb816d21e1 752 #endif /* ENABLE_LOOPBACK */