Yasushi TAUCHI / Mbed 2 deprecated giken9_HTMLServer_Sample

ソースの整理中ですが、利用はできます。

Dependencies:   EthernetInterface HttpServer TextLCD mbed-rpc mbed-rtos mbed Socket lwip-eth lwip-sys lwip

EthernetInterface/lwip/core/netif.c@0:7766f6712673, 2014-03-12 (annotated)

Committer:
yueee_yt
Date:
Wed Mar 12 04:19:54 2014 +0000
Revision:
0:7766f6712673
???????????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yueee_yt 0:7766f6712673 1 /**
yueee_yt 0:7766f6712673 2 * @file
yueee_yt 0:7766f6712673 3 * lwIP network interface abstraction
yueee_yt 0:7766f6712673 4 *
yueee_yt 0:7766f6712673 5 */
yueee_yt 0:7766f6712673 6
yueee_yt 0:7766f6712673 7 /*
yueee_yt 0:7766f6712673 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
yueee_yt 0:7766f6712673 9 * All rights reserved.
yueee_yt 0:7766f6712673 10 *
yueee_yt 0:7766f6712673 11 * Redistribution and use in source and binary forms, with or without modification,
yueee_yt 0:7766f6712673 12 * are permitted provided that the following conditions are met:
yueee_yt 0:7766f6712673 13 *
yueee_yt 0:7766f6712673 14 * 1. Redistributions of source code must retain the above copyright notice,
yueee_yt 0:7766f6712673 15 * this list of conditions and the following disclaimer.
yueee_yt 0:7766f6712673 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
yueee_yt 0:7766f6712673 17 * this list of conditions and the following disclaimer in the documentation
yueee_yt 0:7766f6712673 18 * and/or other materials provided with the distribution.
yueee_yt 0:7766f6712673 19 * 3. The name of the author may not be used to endorse or promote products
yueee_yt 0:7766f6712673 20 * derived from this software without specific prior written permission.
yueee_yt 0:7766f6712673 21 *
yueee_yt 0:7766f6712673 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
yueee_yt 0:7766f6712673 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
yueee_yt 0:7766f6712673 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
yueee_yt 0:7766f6712673 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
yueee_yt 0:7766f6712673 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
yueee_yt 0:7766f6712673 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
yueee_yt 0:7766f6712673 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
yueee_yt 0:7766f6712673 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
yueee_yt 0:7766f6712673 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
yueee_yt 0:7766f6712673 31 * OF SUCH DAMAGE.
yueee_yt 0:7766f6712673 32 *
yueee_yt 0:7766f6712673 33 * This file is part of the lwIP TCP/IP stack.
yueee_yt 0:7766f6712673 34 *
yueee_yt 0:7766f6712673 35 * Author: Adam Dunkels <adam@sics.se>
yueee_yt 0:7766f6712673 36 *
yueee_yt 0:7766f6712673 37 */
yueee_yt 0:7766f6712673 38
yueee_yt 0:7766f6712673 39 #include "lwip/opt.h"
yueee_yt 0:7766f6712673 40
yueee_yt 0:7766f6712673 41 #include "lwip/def.h"
yueee_yt 0:7766f6712673 42 #include "lwip/ip_addr.h"
yueee_yt 0:7766f6712673 43 #include "lwip/netif.h"
yueee_yt 0:7766f6712673 44 #include "lwip/tcp_impl.h"
yueee_yt 0:7766f6712673 45 #include "lwip/snmp.h"
yueee_yt 0:7766f6712673 46 #include "lwip/igmp.h"
yueee_yt 0:7766f6712673 47 #include "netif/etharp.h"
yueee_yt 0:7766f6712673 48 #include "lwip/stats.h"
yueee_yt 0:7766f6712673 49 #if ENABLE_LOOPBACK
yueee_yt 0:7766f6712673 50 #include "lwip/sys.h"
yueee_yt 0:7766f6712673 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
yueee_yt 0:7766f6712673 52 #include "lwip/tcpip.h"
yueee_yt 0:7766f6712673 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
yueee_yt 0:7766f6712673 54 #endif /* ENABLE_LOOPBACK */
yueee_yt 0:7766f6712673 55
yueee_yt 0:7766f6712673 56 #if LWIP_AUTOIP
yueee_yt 0:7766f6712673 57 #include "lwip/autoip.h"
yueee_yt 0:7766f6712673 58 #endif /* LWIP_AUTOIP */
yueee_yt 0:7766f6712673 59 #if LWIP_DHCP
yueee_yt 0:7766f6712673 60 #include "lwip/dhcp.h"
yueee_yt 0:7766f6712673 61 #endif /* LWIP_DHCP */
yueee_yt 0:7766f6712673 62
yueee_yt 0:7766f6712673 63 #if LWIP_NETIF_STATUS_CALLBACK
yueee_yt 0:7766f6712673 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
yueee_yt 0:7766f6712673 65 #else
yueee_yt 0:7766f6712673 66 #define NETIF_STATUS_CALLBACK(n)
yueee_yt 0:7766f6712673 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
yueee_yt 0:7766f6712673 68
yueee_yt 0:7766f6712673 69 #if LWIP_NETIF_LINK_CALLBACK
yueee_yt 0:7766f6712673 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
yueee_yt 0:7766f6712673 71 #else
yueee_yt 0:7766f6712673 72 #define NETIF_LINK_CALLBACK(n)
yueee_yt 0:7766f6712673 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
yueee_yt 0:7766f6712673 74
yueee_yt 0:7766f6712673 75 struct netif *netif_list;
yueee_yt 0:7766f6712673 76 struct netif *netif_default;
yueee_yt 0:7766f6712673 77
yueee_yt 0:7766f6712673 78 #if LWIP_HAVE_LOOPIF
yueee_yt 0:7766f6712673 79 static struct netif loop_netif;
yueee_yt 0:7766f6712673 80
yueee_yt 0:7766f6712673 81 /**
yueee_yt 0:7766f6712673 82 * Initialize a lwip network interface structure for a loopback interface
yueee_yt 0:7766f6712673 83 *
yueee_yt 0:7766f6712673 84 * @param netif the lwip network interface structure for this loopif
yueee_yt 0:7766f6712673 85 * @return ERR_OK if the loopif is initialized
yueee_yt 0:7766f6712673 86 * ERR_MEM if private data couldn't be allocated
yueee_yt 0:7766f6712673 87 */
yueee_yt 0:7766f6712673 88 static err_t
yueee_yt 0:7766f6712673 89 netif_loopif_init(struct netif *netif)
yueee_yt 0:7766f6712673 90 {
yueee_yt 0:7766f6712673 91 /* initialize the snmp variables and counters inside the struct netif
yueee_yt 0:7766f6712673 92 * ifSpeed: no assumption can be made!
yueee_yt 0:7766f6712673 93 */
yueee_yt 0:7766f6712673 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
yueee_yt 0:7766f6712673 95
yueee_yt 0:7766f6712673 96 netif->name[0] = 'l';
yueee_yt 0:7766f6712673 97 netif->name[1] = 'o';
yueee_yt 0:7766f6712673 98 netif->output = netif_loop_output;
yueee_yt 0:7766f6712673 99 return ERR_OK;
yueee_yt 0:7766f6712673 100 }
yueee_yt 0:7766f6712673 101 #endif /* LWIP_HAVE_LOOPIF */
yueee_yt 0:7766f6712673 102
yueee_yt 0:7766f6712673 103 void
yueee_yt 0:7766f6712673 104 netif_init(void)
yueee_yt 0:7766f6712673 105 {
yueee_yt 0:7766f6712673 106 #if LWIP_HAVE_LOOPIF
yueee_yt 0:7766f6712673 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
yueee_yt 0:7766f6712673 108 IP4_ADDR(&loop_gw, 127,0,0,1);
yueee_yt 0:7766f6712673 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
yueee_yt 0:7766f6712673 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
yueee_yt 0:7766f6712673 111
yueee_yt 0:7766f6712673 112 #if NO_SYS
yueee_yt 0:7766f6712673 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
yueee_yt 0:7766f6712673 114 #else /* NO_SYS */
yueee_yt 0:7766f6712673 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
yueee_yt 0:7766f6712673 116 #endif /* NO_SYS */
yueee_yt 0:7766f6712673 117 netif_set_up(&loop_netif);
yueee_yt 0:7766f6712673 118
yueee_yt 0:7766f6712673 119 #endif /* LWIP_HAVE_LOOPIF */
yueee_yt 0:7766f6712673 120 }
yueee_yt 0:7766f6712673 121
yueee_yt 0:7766f6712673 122 /**
yueee_yt 0:7766f6712673 123 * Add a network interface to the list of lwIP netifs.
yueee_yt 0:7766f6712673 124 *
yueee_yt 0:7766f6712673 125 * @param netif a pre-allocated netif structure
yueee_yt 0:7766f6712673 126 * @param ipaddr IP address for the new netif
yueee_yt 0:7766f6712673 127 * @param netmask network mask for the new netif
yueee_yt 0:7766f6712673 128 * @param gw default gateway IP address for the new netif
yueee_yt 0:7766f6712673 129 * @param state opaque data passed to the new netif
yueee_yt 0:7766f6712673 130 * @param init callback function that initializes the interface
yueee_yt 0:7766f6712673 131 * @param input callback function that is called to pass
yueee_yt 0:7766f6712673 132 * ingress packets up in the protocol layer stack.
yueee_yt 0:7766f6712673 133 *
yueee_yt 0:7766f6712673 134 * @return netif, or NULL if failed.
yueee_yt 0:7766f6712673 135 */
yueee_yt 0:7766f6712673 136 struct netif *
yueee_yt 0:7766f6712673 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
yueee_yt 0:7766f6712673 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
yueee_yt 0:7766f6712673 139 {
yueee_yt 0:7766f6712673 140 static u8_t netifnum = 0;
yueee_yt 0:7766f6712673 141
yueee_yt 0:7766f6712673 142 LWIP_ASSERT("No init function given", init != NULL);
yueee_yt 0:7766f6712673 143
yueee_yt 0:7766f6712673 144 /* reset new interface configuration state */
yueee_yt 0:7766f6712673 145 ip_addr_set_zero(&netif->ip_addr);
yueee_yt 0:7766f6712673 146 ip_addr_set_zero(&netif->netmask);
yueee_yt 0:7766f6712673 147 ip_addr_set_zero(&netif->gw);
yueee_yt 0:7766f6712673 148 netif->flags = 0;
yueee_yt 0:7766f6712673 149 #if LWIP_DHCP
yueee_yt 0:7766f6712673 150 /* netif not under DHCP control by default */
yueee_yt 0:7766f6712673 151 netif->dhcp = NULL;
yueee_yt 0:7766f6712673 152 #endif /* LWIP_DHCP */
yueee_yt 0:7766f6712673 153 #if LWIP_AUTOIP
yueee_yt 0:7766f6712673 154 /* netif not under AutoIP control by default */
yueee_yt 0:7766f6712673 155 netif->autoip = NULL;
yueee_yt 0:7766f6712673 156 #endif /* LWIP_AUTOIP */
yueee_yt 0:7766f6712673 157 #if LWIP_NETIF_STATUS_CALLBACK
yueee_yt 0:7766f6712673 158 netif->status_callback = NULL;
yueee_yt 0:7766f6712673 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
yueee_yt 0:7766f6712673 160 #if LWIP_NETIF_LINK_CALLBACK
yueee_yt 0:7766f6712673 161 netif->link_callback = NULL;
yueee_yt 0:7766f6712673 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
yueee_yt 0:7766f6712673 163 #if LWIP_IGMP
yueee_yt 0:7766f6712673 164 netif->igmp_mac_filter = NULL;
yueee_yt 0:7766f6712673 165 #endif /* LWIP_IGMP */
yueee_yt 0:7766f6712673 166 #if ENABLE_LOOPBACK
yueee_yt 0:7766f6712673 167 netif->loop_first = NULL;
yueee_yt 0:7766f6712673 168 netif->loop_last = NULL;
yueee_yt 0:7766f6712673 169 #endif /* ENABLE_LOOPBACK */
yueee_yt 0:7766f6712673 170
yueee_yt 0:7766f6712673 171 /* remember netif specific state information data */
yueee_yt 0:7766f6712673 172 netif->state = state;
yueee_yt 0:7766f6712673 173 netif->num = netifnum++;
yueee_yt 0:7766f6712673 174 netif->input = input;
yueee_yt 0:7766f6712673 175 #if LWIP_NETIF_HWADDRHINT
yueee_yt 0:7766f6712673 176 netif->addr_hint = NULL;
yueee_yt 0:7766f6712673 177 #endif /* LWIP_NETIF_HWADDRHINT*/
yueee_yt 0:7766f6712673 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
yueee_yt 0:7766f6712673 179 netif->loop_cnt_current = 0;
yueee_yt 0:7766f6712673 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
yueee_yt 0:7766f6712673 181
yueee_yt 0:7766f6712673 182 netif_set_addr(netif, ipaddr, netmask, gw);
yueee_yt 0:7766f6712673 183
yueee_yt 0:7766f6712673 184 /* call user specified initialization function for netif */
yueee_yt 0:7766f6712673 185 if (init(netif) != ERR_OK) {
yueee_yt 0:7766f6712673 186 return NULL;
yueee_yt 0:7766f6712673 187 }
yueee_yt 0:7766f6712673 188
yueee_yt 0:7766f6712673 189 /* add this netif to the list */
yueee_yt 0:7766f6712673 190 netif->next = netif_list;
yueee_yt 0:7766f6712673 191 netif_list = netif;
yueee_yt 0:7766f6712673 192 snmp_inc_iflist();
yueee_yt 0:7766f6712673 193
yueee_yt 0:7766f6712673 194 #if LWIP_IGMP
yueee_yt 0:7766f6712673 195 /* start IGMP processing */
yueee_yt 0:7766f6712673 196 if (netif->flags & NETIF_FLAG_IGMP) {
yueee_yt 0:7766f6712673 197 igmp_start(netif);
yueee_yt 0:7766f6712673 198 }
yueee_yt 0:7766f6712673 199 #endif /* LWIP_IGMP */
yueee_yt 0:7766f6712673 200
yueee_yt 0:7766f6712673 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
yueee_yt 0:7766f6712673 202 netif->name[0], netif->name[1]));
yueee_yt 0:7766f6712673 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
yueee_yt 0:7766f6712673 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
yueee_yt 0:7766f6712673 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
yueee_yt 0:7766f6712673 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
yueee_yt 0:7766f6712673 207 ip_addr_debug_print(NETIF_DEBUG, gw);
yueee_yt 0:7766f6712673 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
yueee_yt 0:7766f6712673 209 return netif;
yueee_yt 0:7766f6712673 210 }
yueee_yt 0:7766f6712673 211
yueee_yt 0:7766f6712673 212 /**
yueee_yt 0:7766f6712673 213 * Change IP address configuration for a network interface (including netmask
yueee_yt 0:7766f6712673 214 * and default gateway).
yueee_yt 0:7766f6712673 215 *
yueee_yt 0:7766f6712673 216 * @param netif the network interface to change
yueee_yt 0:7766f6712673 217 * @param ipaddr the new IP address
yueee_yt 0:7766f6712673 218 * @param netmask the new netmask
yueee_yt 0:7766f6712673 219 * @param gw the new default gateway
yueee_yt 0:7766f6712673 220 */
yueee_yt 0:7766f6712673 221 void
yueee_yt 0:7766f6712673 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
yueee_yt 0:7766f6712673 223 ip_addr_t *gw)
yueee_yt 0:7766f6712673 224 {
yueee_yt 0:7766f6712673 225 netif_set_ipaddr(netif, ipaddr);
yueee_yt 0:7766f6712673 226 netif_set_netmask(netif, netmask);
yueee_yt 0:7766f6712673 227 netif_set_gw(netif, gw);
yueee_yt 0:7766f6712673 228 }
yueee_yt 0:7766f6712673 229
yueee_yt 0:7766f6712673 230 /**
yueee_yt 0:7766f6712673 231 * Remove a network interface from the list of lwIP netifs.
yueee_yt 0:7766f6712673 232 *
yueee_yt 0:7766f6712673 233 * @param netif the network interface to remove
yueee_yt 0:7766f6712673 234 */
yueee_yt 0:7766f6712673 235 void
yueee_yt 0:7766f6712673 236 netif_remove(struct netif *netif)
yueee_yt 0:7766f6712673 237 {
yueee_yt 0:7766f6712673 238 if (netif == NULL) {
yueee_yt 0:7766f6712673 239 return;
yueee_yt 0:7766f6712673 240 }
yueee_yt 0:7766f6712673 241
yueee_yt 0:7766f6712673 242 #if LWIP_IGMP
yueee_yt 0:7766f6712673 243 /* stop IGMP processing */
yueee_yt 0:7766f6712673 244 if (netif->flags & NETIF_FLAG_IGMP) {
yueee_yt 0:7766f6712673 245 igmp_stop(netif);
yueee_yt 0:7766f6712673 246 }
yueee_yt 0:7766f6712673 247 #endif /* LWIP_IGMP */
yueee_yt 0:7766f6712673 248 if (netif_is_up(netif)) {
yueee_yt 0:7766f6712673 249 /* set netif down before removing (call callback function) */
yueee_yt 0:7766f6712673 250 netif_set_down(netif);
yueee_yt 0:7766f6712673 251 }
yueee_yt 0:7766f6712673 252
yueee_yt 0:7766f6712673 253 snmp_delete_ipaddridx_tree(netif);
yueee_yt 0:7766f6712673 254
yueee_yt 0:7766f6712673 255 /* is it the first netif? */
yueee_yt 0:7766f6712673 256 if (netif_list == netif) {
yueee_yt 0:7766f6712673 257 netif_list = netif->next;
yueee_yt 0:7766f6712673 258 } else {
yueee_yt 0:7766f6712673 259 /* look for netif further down the list */
yueee_yt 0:7766f6712673 260 struct netif * tmpNetif;
yueee_yt 0:7766f6712673 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
yueee_yt 0:7766f6712673 262 if (tmpNetif->next == netif) {
yueee_yt 0:7766f6712673 263 tmpNetif->next = netif->next;
yueee_yt 0:7766f6712673 264 break;
yueee_yt 0:7766f6712673 265 }
yueee_yt 0:7766f6712673 266 }
yueee_yt 0:7766f6712673 267 if (tmpNetif == NULL)
yueee_yt 0:7766f6712673 268 return; /* we didn't find any netif today */
yueee_yt 0:7766f6712673 269 }
yueee_yt 0:7766f6712673 270 snmp_dec_iflist();
yueee_yt 0:7766f6712673 271 /* this netif is default? */
yueee_yt 0:7766f6712673 272 if (netif_default == netif) {
yueee_yt 0:7766f6712673 273 /* reset default netif */
yueee_yt 0:7766f6712673 274 netif_set_default(NULL);
yueee_yt 0:7766f6712673 275 }
yueee_yt 0:7766f6712673 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
yueee_yt 0:7766f6712673 277 }
yueee_yt 0:7766f6712673 278
yueee_yt 0:7766f6712673 279 /**
yueee_yt 0:7766f6712673 280 * Find a network interface by searching for its name
yueee_yt 0:7766f6712673 281 *
yueee_yt 0:7766f6712673 282 * @param name the name of the netif (like netif->name) plus concatenated number
yueee_yt 0:7766f6712673 283 * in ascii representation (e.g. 'en0')
yueee_yt 0:7766f6712673 284 */
yueee_yt 0:7766f6712673 285 struct netif *
yueee_yt 0:7766f6712673 286 netif_find(char *name)
yueee_yt 0:7766f6712673 287 {
yueee_yt 0:7766f6712673 288 struct netif *netif;
yueee_yt 0:7766f6712673 289 u8_t num;
yueee_yt 0:7766f6712673 290
yueee_yt 0:7766f6712673 291 if (name == NULL) {
yueee_yt 0:7766f6712673 292 return NULL;
yueee_yt 0:7766f6712673 293 }
yueee_yt 0:7766f6712673 294
yueee_yt 0:7766f6712673 295 num = name[2] - '0';
yueee_yt 0:7766f6712673 296
yueee_yt 0:7766f6712673 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
yueee_yt 0:7766f6712673 298 if (num == netif->num &&
yueee_yt 0:7766f6712673 299 name[0] == netif->name[0] &&
yueee_yt 0:7766f6712673 300 name[1] == netif->name[1]) {
yueee_yt 0:7766f6712673 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
yueee_yt 0:7766f6712673 302 return netif;
yueee_yt 0:7766f6712673 303 }
yueee_yt 0:7766f6712673 304 }
yueee_yt 0:7766f6712673 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
yueee_yt 0:7766f6712673 306 return NULL;
yueee_yt 0:7766f6712673 307 }
yueee_yt 0:7766f6712673 308
yueee_yt 0:7766f6712673 309 /**
yueee_yt 0:7766f6712673 310 * Change the IP address of a network interface
yueee_yt 0:7766f6712673 311 *
yueee_yt 0:7766f6712673 312 * @param netif the network interface to change
yueee_yt 0:7766f6712673 313 * @param ipaddr the new IP address
yueee_yt 0:7766f6712673 314 *
yueee_yt 0:7766f6712673 315 * @note call netif_set_addr() if you also want to change netmask and
yueee_yt 0:7766f6712673 316 * default gateway
yueee_yt 0:7766f6712673 317 */
yueee_yt 0:7766f6712673 318 void
yueee_yt 0:7766f6712673 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
yueee_yt 0:7766f6712673 320 {
yueee_yt 0:7766f6712673 321 /* Protect against dereferencing NULL pointers by
yueee_yt 0:7766f6712673 322 treating like ANY, as does ip_addr_set() */
yueee_yt 0:7766f6712673 323 if (!ipaddr) {
yueee_yt 0:7766f6712673 324 ipaddr = IP_ADDR_ANY;
yueee_yt 0:7766f6712673 325 }
yueee_yt 0:7766f6712673 326
yueee_yt 0:7766f6712673 327 /* TODO: Handling of obsolete pcbs */
yueee_yt 0:7766f6712673 328 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
yueee_yt 0:7766f6712673 329 #if LWIP_TCP
yueee_yt 0:7766f6712673 330 struct tcp_pcb *pcb;
yueee_yt 0:7766f6712673 331 struct tcp_pcb_listen *lpcb;
yueee_yt 0:7766f6712673 332
yueee_yt 0:7766f6712673 333 /* address is actually being changed? */
yueee_yt 0:7766f6712673 334 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
yueee_yt 0:7766f6712673 335 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
yueee_yt 0:7766f6712673 336 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
yueee_yt 0:7766f6712673 337 pcb = tcp_active_pcbs;
yueee_yt 0:7766f6712673 338 while (pcb != NULL) {
yueee_yt 0:7766f6712673 339 /* PCB bound to current local interface address? */
yueee_yt 0:7766f6712673 340 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
yueee_yt 0:7766f6712673 341 #if LWIP_AUTOIP
yueee_yt 0:7766f6712673 342 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
yueee_yt 0:7766f6712673 343 && !ip_addr_islinklocal(&(pcb->local_ip))
yueee_yt 0:7766f6712673 344 #endif /* LWIP_AUTOIP */
yueee_yt 0:7766f6712673 345 ) {
yueee_yt 0:7766f6712673 346 /* this connection must be aborted */
yueee_yt 0:7766f6712673 347 struct tcp_pcb *next = pcb->next;
yueee_yt 0:7766f6712673 348 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
yueee_yt 0:7766f6712673 349 tcp_abort(pcb);
yueee_yt 0:7766f6712673 350 pcb = next;
yueee_yt 0:7766f6712673 351 } else {
yueee_yt 0:7766f6712673 352 pcb = pcb->next;
yueee_yt 0:7766f6712673 353 }
yueee_yt 0:7766f6712673 354 }
yueee_yt 0:7766f6712673 355 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
yueee_yt 0:7766f6712673 356 /* PCB bound to current local interface address? */
yueee_yt 0:7766f6712673 357 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
yueee_yt 0:7766f6712673 358 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
yueee_yt 0:7766f6712673 359 /* The PCB is listening to the old ipaddr and
yueee_yt 0:7766f6712673 360 * is set to listen to the new one instead */
yueee_yt 0:7766f6712673 361 ip_addr_set(&(lpcb->local_ip), ipaddr);
yueee_yt 0:7766f6712673 362 }
yueee_yt 0:7766f6712673 363 }
yueee_yt 0:7766f6712673 364 }
yueee_yt 0:7766f6712673 365 #endif
yueee_yt 0:7766f6712673 366 snmp_delete_ipaddridx_tree(netif);
yueee_yt 0:7766f6712673 367 snmp_delete_iprteidx_tree(0,netif);
yueee_yt 0:7766f6712673 368 /* set new IP address to netif */
yueee_yt 0:7766f6712673 369 ip_addr_set(&(netif->ip_addr), ipaddr);
yueee_yt 0:7766f6712673 370 snmp_insert_ipaddridx_tree(netif);
yueee_yt 0:7766f6712673 371 snmp_insert_iprteidx_tree(0,netif);
yueee_yt 0:7766f6712673 372
yueee_yt 0:7766f6712673 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",
yueee_yt 0:7766f6712673 374 netif->name[0], netif->name[1],
yueee_yt 0:7766f6712673 375 ip4_addr1_16(&netif->ip_addr),
yueee_yt 0:7766f6712673 376 ip4_addr2_16(&netif->ip_addr),
yueee_yt 0:7766f6712673 377 ip4_addr3_16(&netif->ip_addr),
yueee_yt 0:7766f6712673 378 ip4_addr4_16(&netif->ip_addr)));
yueee_yt 0:7766f6712673 379 }
yueee_yt 0:7766f6712673 380
yueee_yt 0:7766f6712673 381 /**
yueee_yt 0:7766f6712673 382 * Change the default gateway for a network interface
yueee_yt 0:7766f6712673 383 *
yueee_yt 0:7766f6712673 384 * @param netif the network interface to change
yueee_yt 0:7766f6712673 385 * @param gw the new default gateway
yueee_yt 0:7766f6712673 386 *
yueee_yt 0:7766f6712673 387 * @note call netif_set_addr() if you also want to change ip address and netmask
yueee_yt 0:7766f6712673 388 */
yueee_yt 0:7766f6712673 389 void
yueee_yt 0:7766f6712673 390 netif_set_gw(struct netif *netif, ip_addr_t *gw)
yueee_yt 0:7766f6712673 391 {
yueee_yt 0:7766f6712673 392 ip_addr_set(&(netif->gw), gw);
yueee_yt 0:7766f6712673 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",
yueee_yt 0:7766f6712673 394 netif->name[0], netif->name[1],
yueee_yt 0:7766f6712673 395 ip4_addr1_16(&netif->gw),
yueee_yt 0:7766f6712673 396 ip4_addr2_16(&netif->gw),
yueee_yt 0:7766f6712673 397 ip4_addr3_16(&netif->gw),
yueee_yt 0:7766f6712673 398 ip4_addr4_16(&netif->gw)));
yueee_yt 0:7766f6712673 399 }
yueee_yt 0:7766f6712673 400
yueee_yt 0:7766f6712673 401 /**
yueee_yt 0:7766f6712673 402 * Change the netmask of a network interface
yueee_yt 0:7766f6712673 403 *
yueee_yt 0:7766f6712673 404 * @param netif the network interface to change
yueee_yt 0:7766f6712673 405 * @param netmask the new netmask
yueee_yt 0:7766f6712673 406 *
yueee_yt 0:7766f6712673 407 * @note call netif_set_addr() if you also want to change ip address and
yueee_yt 0:7766f6712673 408 * default gateway
yueee_yt 0:7766f6712673 409 */
yueee_yt 0:7766f6712673 410 void
yueee_yt 0:7766f6712673 411 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
yueee_yt 0:7766f6712673 412 {
yueee_yt 0:7766f6712673 413 snmp_delete_iprteidx_tree(0, netif);
yueee_yt 0:7766f6712673 414 /* set new netmask to netif */
yueee_yt 0:7766f6712673 415 ip_addr_set(&(netif->netmask), netmask);
yueee_yt 0:7766f6712673 416 snmp_insert_iprteidx_tree(0, netif);
yueee_yt 0:7766f6712673 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",
yueee_yt 0:7766f6712673 418 netif->name[0], netif->name[1],
yueee_yt 0:7766f6712673 419 ip4_addr1_16(&netif->netmask),
yueee_yt 0:7766f6712673 420 ip4_addr2_16(&netif->netmask),
yueee_yt 0:7766f6712673 421 ip4_addr3_16(&netif->netmask),
yueee_yt 0:7766f6712673 422 ip4_addr4_16(&netif->netmask)));
yueee_yt 0:7766f6712673 423 }
yueee_yt 0:7766f6712673 424
yueee_yt 0:7766f6712673 425 /**
yueee_yt 0:7766f6712673 426 * Set a network interface as the default network interface
yueee_yt 0:7766f6712673 427 * (used to output all packets for which no specific route is found)
yueee_yt 0:7766f6712673 428 *
yueee_yt 0:7766f6712673 429 * @param netif the default network interface
yueee_yt 0:7766f6712673 430 */
yueee_yt 0:7766f6712673 431 void
yueee_yt 0:7766f6712673 432 netif_set_default(struct netif *netif)
yueee_yt 0:7766f6712673 433 {
yueee_yt 0:7766f6712673 434 if (netif == NULL) {
yueee_yt 0:7766f6712673 435 /* remove default route */
yueee_yt 0:7766f6712673 436 snmp_delete_iprteidx_tree(1, netif);
yueee_yt 0:7766f6712673 437 } else {
yueee_yt 0:7766f6712673 438 /* install default route */
yueee_yt 0:7766f6712673 439 snmp_insert_iprteidx_tree(1, netif);
yueee_yt 0:7766f6712673 440 }
yueee_yt 0:7766f6712673 441 netif_default = netif;
yueee_yt 0:7766f6712673 442 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
yueee_yt 0:7766f6712673 443 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
yueee_yt 0:7766f6712673 444 }
yueee_yt 0:7766f6712673 445
yueee_yt 0:7766f6712673 446 /**
yueee_yt 0:7766f6712673 447 * Bring an interface up, available for processing
yueee_yt 0:7766f6712673 448 * traffic.
yueee_yt 0:7766f6712673 449 *
yueee_yt 0:7766f6712673 450 * @note: Enabling DHCP on a down interface will make it come
yueee_yt 0:7766f6712673 451 * up once configured.
yueee_yt 0:7766f6712673 452 *
yueee_yt 0:7766f6712673 453 * @see dhcp_start()
yueee_yt 0:7766f6712673 454 */
yueee_yt 0:7766f6712673 455 void netif_set_up(struct netif *netif)
yueee_yt 0:7766f6712673 456 {
yueee_yt 0:7766f6712673 457 if (!(netif->flags & NETIF_FLAG_UP)) {
yueee_yt 0:7766f6712673 458 netif->flags |= NETIF_FLAG_UP;
yueee_yt 0:7766f6712673 459
yueee_yt 0:7766f6712673 460 #if LWIP_SNMP
yueee_yt 0:7766f6712673 461 snmp_get_sysuptime(&netif->ts);
yueee_yt 0:7766f6712673 462 #endif /* LWIP_SNMP */
yueee_yt 0:7766f6712673 463
yueee_yt 0:7766f6712673 464 NETIF_STATUS_CALLBACK(netif);
yueee_yt 0:7766f6712673 465
yueee_yt 0:7766f6712673 466 if (netif->flags & NETIF_FLAG_LINK_UP) {
yueee_yt 0:7766f6712673 467 #if LWIP_ARP
yueee_yt 0:7766f6712673 468 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
yueee_yt 0:7766f6712673 469 if (netif->flags & (NETIF_FLAG_ETHARP)) {
yueee_yt 0:7766f6712673 470 etharp_gratuitous(netif);
yueee_yt 0:7766f6712673 471 }
yueee_yt 0:7766f6712673 472 #endif /* LWIP_ARP */
yueee_yt 0:7766f6712673 473
yueee_yt 0:7766f6712673 474 #if LWIP_IGMP
yueee_yt 0:7766f6712673 475 /* resend IGMP memberships */
yueee_yt 0:7766f6712673 476 if (netif->flags & NETIF_FLAG_IGMP) {
yueee_yt 0:7766f6712673 477 igmp_report_groups( netif);
yueee_yt 0:7766f6712673 478 }
yueee_yt 0:7766f6712673 479 #endif /* LWIP_IGMP */
yueee_yt 0:7766f6712673 480 }
yueee_yt 0:7766f6712673 481 }
yueee_yt 0:7766f6712673 482 }
yueee_yt 0:7766f6712673 483
yueee_yt 0:7766f6712673 484 /**
yueee_yt 0:7766f6712673 485 * Bring an interface down, disabling any traffic processing.
yueee_yt 0:7766f6712673 486 *
yueee_yt 0:7766f6712673 487 * @note: Enabling DHCP on a down interface will make it come
yueee_yt 0:7766f6712673 488 * up once configured.
yueee_yt 0:7766f6712673 489 *
yueee_yt 0:7766f6712673 490 * @see dhcp_start()
yueee_yt 0:7766f6712673 491 */
yueee_yt 0:7766f6712673 492 void netif_set_down(struct netif *netif)
yueee_yt 0:7766f6712673 493 {
yueee_yt 0:7766f6712673 494 if (netif->flags & NETIF_FLAG_UP) {
yueee_yt 0:7766f6712673 495 netif->flags &= ~NETIF_FLAG_UP;
yueee_yt 0:7766f6712673 496 #if LWIP_SNMP
yueee_yt 0:7766f6712673 497 snmp_get_sysuptime(&netif->ts);
yueee_yt 0:7766f6712673 498 #endif
yueee_yt 0:7766f6712673 499
yueee_yt 0:7766f6712673 500 NETIF_STATUS_CALLBACK(netif);
yueee_yt 0:7766f6712673 501 }
yueee_yt 0:7766f6712673 502 }
yueee_yt 0:7766f6712673 503
yueee_yt 0:7766f6712673 504 #if LWIP_NETIF_STATUS_CALLBACK
yueee_yt 0:7766f6712673 505 /**
yueee_yt 0:7766f6712673 506 * Set callback to be called when interface is brought up/down
yueee_yt 0:7766f6712673 507 */
yueee_yt 0:7766f6712673 508 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
yueee_yt 0:7766f6712673 509 {
yueee_yt 0:7766f6712673 510 if (netif) {
yueee_yt 0:7766f6712673 511 netif->status_callback = status_callback;
yueee_yt 0:7766f6712673 512 }
yueee_yt 0:7766f6712673 513 }
yueee_yt 0:7766f6712673 514 #endif /* LWIP_NETIF_STATUS_CALLBACK */
yueee_yt 0:7766f6712673 515
yueee_yt 0:7766f6712673 516 /**
yueee_yt 0:7766f6712673 517 * Called by a driver when its link goes up
yueee_yt 0:7766f6712673 518 */
yueee_yt 0:7766f6712673 519 void netif_set_link_up(struct netif *netif )
yueee_yt 0:7766f6712673 520 {
yueee_yt 0:7766f6712673 521 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
yueee_yt 0:7766f6712673 522 netif->flags |= NETIF_FLAG_LINK_UP;
yueee_yt 0:7766f6712673 523
yueee_yt 0:7766f6712673 524 #if LWIP_DHCP
yueee_yt 0:7766f6712673 525 if (netif->dhcp) {
yueee_yt 0:7766f6712673 526 dhcp_network_changed(netif);
yueee_yt 0:7766f6712673 527 }
yueee_yt 0:7766f6712673 528 #endif /* LWIP_DHCP */
yueee_yt 0:7766f6712673 529
yueee_yt 0:7766f6712673 530 #if LWIP_AUTOIP
yueee_yt 0:7766f6712673 531 if (netif->autoip) {
yueee_yt 0:7766f6712673 532 autoip_network_changed(netif);
yueee_yt 0:7766f6712673 533 }
yueee_yt 0:7766f6712673 534 #endif /* LWIP_AUTOIP */
yueee_yt 0:7766f6712673 535
yueee_yt 0:7766f6712673 536 if (netif->flags & NETIF_FLAG_UP) {
yueee_yt 0:7766f6712673 537 #if LWIP_ARP
yueee_yt 0:7766f6712673 538 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
yueee_yt 0:7766f6712673 539 if (netif->flags & NETIF_FLAG_ETHARP) {
yueee_yt 0:7766f6712673 540 etharp_gratuitous(netif);
yueee_yt 0:7766f6712673 541 }
yueee_yt 0:7766f6712673 542 #endif /* LWIP_ARP */
yueee_yt 0:7766f6712673 543
yueee_yt 0:7766f6712673 544 #if LWIP_IGMP
yueee_yt 0:7766f6712673 545 /* resend IGMP memberships */
yueee_yt 0:7766f6712673 546 if (netif->flags & NETIF_FLAG_IGMP) {
yueee_yt 0:7766f6712673 547 igmp_report_groups( netif);
yueee_yt 0:7766f6712673 548 }
yueee_yt 0:7766f6712673 549 #endif /* LWIP_IGMP */
yueee_yt 0:7766f6712673 550 }
yueee_yt 0:7766f6712673 551 NETIF_LINK_CALLBACK(netif);
yueee_yt 0:7766f6712673 552 }
yueee_yt 0:7766f6712673 553 }
yueee_yt 0:7766f6712673 554
yueee_yt 0:7766f6712673 555 /**
yueee_yt 0:7766f6712673 556 * Called by a driver when its link goes down
yueee_yt 0:7766f6712673 557 */
yueee_yt 0:7766f6712673 558 void netif_set_link_down(struct netif *netif )
yueee_yt 0:7766f6712673 559 {
yueee_yt 0:7766f6712673 560 if (netif->flags & NETIF_FLAG_LINK_UP) {
yueee_yt 0:7766f6712673 561 netif->flags &= ~NETIF_FLAG_LINK_UP;
yueee_yt 0:7766f6712673 562 NETIF_LINK_CALLBACK(netif);
yueee_yt 0:7766f6712673 563 }
yueee_yt 0:7766f6712673 564 }
yueee_yt 0:7766f6712673 565
yueee_yt 0:7766f6712673 566 #if LWIP_NETIF_LINK_CALLBACK
yueee_yt 0:7766f6712673 567 /**
yueee_yt 0:7766f6712673 568 * Set callback to be called when link is brought up/down
yueee_yt 0:7766f6712673 569 */
yueee_yt 0:7766f6712673 570 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
yueee_yt 0:7766f6712673 571 {
yueee_yt 0:7766f6712673 572 if (netif) {
yueee_yt 0:7766f6712673 573 netif->link_callback = link_callback;
yueee_yt 0:7766f6712673 574 }
yueee_yt 0:7766f6712673 575 }
yueee_yt 0:7766f6712673 576 #endif /* LWIP_NETIF_LINK_CALLBACK */
yueee_yt 0:7766f6712673 577
yueee_yt 0:7766f6712673 578 #if ENABLE_LOOPBACK
yueee_yt 0:7766f6712673 579 /**
yueee_yt 0:7766f6712673 580 * Send an IP packet to be received on the same netif (loopif-like).
yueee_yt 0:7766f6712673 581 * The pbuf is simply copied and handed back to netif->input.
yueee_yt 0:7766f6712673 582 * In multithreaded mode, this is done directly since netif->input must put
yueee_yt 0:7766f6712673 583 * the packet on a queue.
yueee_yt 0:7766f6712673 584 * In callback mode, the packet is put on an internal queue and is fed to
yueee_yt 0:7766f6712673 585 * netif->input by netif_poll().
yueee_yt 0:7766f6712673 586 *
yueee_yt 0:7766f6712673 587 * @param netif the lwip network interface structure
yueee_yt 0:7766f6712673 588 * @param p the (IP) packet to 'send'
yueee_yt 0:7766f6712673 589 * @param ipaddr the ip address to send the packet to (not used)
yueee_yt 0:7766f6712673 590 * @return ERR_OK if the packet has been sent
yueee_yt 0:7766f6712673 591 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
yueee_yt 0:7766f6712673 592 */
yueee_yt 0:7766f6712673 593 err_t
yueee_yt 0:7766f6712673 594 netif_loop_output(struct netif *netif, struct pbuf *p,
yueee_yt 0:7766f6712673 595 ip_addr_t *ipaddr)
yueee_yt 0:7766f6712673 596 {
yueee_yt 0:7766f6712673 597 struct pbuf *r;
yueee_yt 0:7766f6712673 598 err_t err;
yueee_yt 0:7766f6712673 599 struct pbuf *last;
yueee_yt 0:7766f6712673 600 #if LWIP_LOOPBACK_MAX_PBUFS
yueee_yt 0:7766f6712673 601 u8_t clen = 0;
yueee_yt 0:7766f6712673 602 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
yueee_yt 0:7766f6712673 603 /* If we have a loopif, SNMP counters are adjusted for it,
yueee_yt 0:7766f6712673 604 * if not they are adjusted for 'netif'. */
yueee_yt 0:7766f6712673 605 #if LWIP_SNMP
yueee_yt 0:7766f6712673 606 #if LWIP_HAVE_LOOPIF
yueee_yt 0:7766f6712673 607 struct netif *stats_if = &loop_netif;
yueee_yt 0:7766f6712673 608 #else /* LWIP_HAVE_LOOPIF */
yueee_yt 0:7766f6712673 609 struct netif *stats_if = netif;
yueee_yt 0:7766f6712673 610 #endif /* LWIP_HAVE_LOOPIF */
yueee_yt 0:7766f6712673 611 #endif /* LWIP_SNMP */
yueee_yt 0:7766f6712673 612 SYS_ARCH_DECL_PROTECT(lev);
yueee_yt 0:7766f6712673 613 LWIP_UNUSED_ARG(ipaddr);
yueee_yt 0:7766f6712673 614
yueee_yt 0:7766f6712673 615 /* Allocate a new pbuf */
yueee_yt 0:7766f6712673 616 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
yueee_yt 0:7766f6712673 617 if (r == NULL) {
yueee_yt 0:7766f6712673 618 LINK_STATS_INC(link.memerr);
yueee_yt 0:7766f6712673 619 LINK_STATS_INC(link.drop);
yueee_yt 0:7766f6712673 620 snmp_inc_ifoutdiscards(stats_if);
yueee_yt 0:7766f6712673 621 return ERR_MEM;
yueee_yt 0:7766f6712673 622 }
yueee_yt 0:7766f6712673 623 #if LWIP_LOOPBACK_MAX_PBUFS
yueee_yt 0:7766f6712673 624 clen = pbuf_clen(r);
yueee_yt 0:7766f6712673 625 /* check for overflow or too many pbuf on queue */
yueee_yt 0:7766f6712673 626 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
yueee_yt 0:7766f6712673 627 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
yueee_yt 0:7766f6712673 628 pbuf_free(r);
yueee_yt 0:7766f6712673 629 LINK_STATS_INC(link.memerr);
yueee_yt 0:7766f6712673 630 LINK_STATS_INC(link.drop);
yueee_yt 0:7766f6712673 631 snmp_inc_ifoutdiscards(stats_if);
yueee_yt 0:7766f6712673 632 return ERR_MEM;
yueee_yt 0:7766f6712673 633 }
yueee_yt 0:7766f6712673 634 netif->loop_cnt_current += clen;
yueee_yt 0:7766f6712673 635 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
yueee_yt 0:7766f6712673 636
yueee_yt 0:7766f6712673 637 /* Copy the whole pbuf queue p into the single pbuf r */
yueee_yt 0:7766f6712673 638 if ((err = pbuf_copy(r, p)) != ERR_OK) {
yueee_yt 0:7766f6712673 639 pbuf_free(r);
yueee_yt 0:7766f6712673 640 LINK_STATS_INC(link.memerr);
yueee_yt 0:7766f6712673 641 LINK_STATS_INC(link.drop);
yueee_yt 0:7766f6712673 642 snmp_inc_ifoutdiscards(stats_if);
yueee_yt 0:7766f6712673 643 return err;
yueee_yt 0:7766f6712673 644 }
yueee_yt 0:7766f6712673 645
yueee_yt 0:7766f6712673 646 /* Put the packet on a linked list which gets emptied through calling
yueee_yt 0:7766f6712673 647 netif_poll(). */
yueee_yt 0:7766f6712673 648
yueee_yt 0:7766f6712673 649 /* let last point to the last pbuf in chain r */
yueee_yt 0:7766f6712673 650 for (last = r; last->next != NULL; last = last->next);
yueee_yt 0:7766f6712673 651
yueee_yt 0:7766f6712673 652 SYS_ARCH_PROTECT(lev);
yueee_yt 0:7766f6712673 653 if(netif->loop_first != NULL) {
yueee_yt 0:7766f6712673 654 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
yueee_yt 0:7766f6712673 655 netif->loop_last->next = r;
yueee_yt 0:7766f6712673 656 netif->loop_last = last;
yueee_yt 0:7766f6712673 657 } else {
yueee_yt 0:7766f6712673 658 netif->loop_first = r;
yueee_yt 0:7766f6712673 659 netif->loop_last = last;
yueee_yt 0:7766f6712673 660 }
yueee_yt 0:7766f6712673 661 SYS_ARCH_UNPROTECT(lev);
yueee_yt 0:7766f6712673 662
yueee_yt 0:7766f6712673 663 LINK_STATS_INC(link.xmit);
yueee_yt 0:7766f6712673 664 snmp_add_ifoutoctets(stats_if, p->tot_len);
yueee_yt 0:7766f6712673 665 snmp_inc_ifoutucastpkts(stats_if);
yueee_yt 0:7766f6712673 666
yueee_yt 0:7766f6712673 667 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
yueee_yt 0:7766f6712673 668 /* For multithreading environment, schedule a call to netif_poll */
yueee_yt 0:7766f6712673 669 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
yueee_yt 0:7766f6712673 670 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
yueee_yt 0:7766f6712673 671
yueee_yt 0:7766f6712673 672 return ERR_OK;
yueee_yt 0:7766f6712673 673 }
yueee_yt 0:7766f6712673 674
yueee_yt 0:7766f6712673 675 /**
yueee_yt 0:7766f6712673 676 * Call netif_poll() in the main loop of your application. This is to prevent
yueee_yt 0:7766f6712673 677 * reentering non-reentrant functions like tcp_input(). Packets passed to
yueee_yt 0:7766f6712673 678 * netif_loop_output() are put on a list that is passed to netif->input() by
yueee_yt 0:7766f6712673 679 * netif_poll().
yueee_yt 0:7766f6712673 680 */
yueee_yt 0:7766f6712673 681 void
yueee_yt 0:7766f6712673 682 netif_poll(struct netif *netif)
yueee_yt 0:7766f6712673 683 {
yueee_yt 0:7766f6712673 684 struct pbuf *in;
yueee_yt 0:7766f6712673 685 /* If we have a loopif, SNMP counters are adjusted for it,
yueee_yt 0:7766f6712673 686 * if not they are adjusted for 'netif'. */
yueee_yt 0:7766f6712673 687 #if LWIP_SNMP
yueee_yt 0:7766f6712673 688 #if LWIP_HAVE_LOOPIF
yueee_yt 0:7766f6712673 689 struct netif *stats_if = &loop_netif;
yueee_yt 0:7766f6712673 690 #else /* LWIP_HAVE_LOOPIF */
yueee_yt 0:7766f6712673 691 struct netif *stats_if = netif;
yueee_yt 0:7766f6712673 692 #endif /* LWIP_HAVE_LOOPIF */
yueee_yt 0:7766f6712673 693 #endif /* LWIP_SNMP */
yueee_yt 0:7766f6712673 694 SYS_ARCH_DECL_PROTECT(lev);
yueee_yt 0:7766f6712673 695
yueee_yt 0:7766f6712673 696 do {
yueee_yt 0:7766f6712673 697 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
yueee_yt 0:7766f6712673 698 SYS_ARCH_PROTECT(lev);
yueee_yt 0:7766f6712673 699 in = netif->loop_first;
yueee_yt 0:7766f6712673 700 if (in != NULL) {
yueee_yt 0:7766f6712673 701 struct pbuf *in_end = in;
yueee_yt 0:7766f6712673 702 #if LWIP_LOOPBACK_MAX_PBUFS
yueee_yt 0:7766f6712673 703 u8_t clen = pbuf_clen(in);
yueee_yt 0:7766f6712673 704 /* adjust the number of pbufs on queue */
yueee_yt 0:7766f6712673 705 LWIP_ASSERT("netif->loop_cnt_current underflow",
yueee_yt 0:7766f6712673 706 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
yueee_yt 0:7766f6712673 707 netif->loop_cnt_current -= clen;
yueee_yt 0:7766f6712673 708 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
yueee_yt 0:7766f6712673 709 while (in_end->len != in_end->tot_len) {
yueee_yt 0:7766f6712673 710 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
yueee_yt 0:7766f6712673 711 in_end = in_end->next;
yueee_yt 0:7766f6712673 712 }
yueee_yt 0:7766f6712673 713 /* 'in_end' now points to the last pbuf from 'in' */
yueee_yt 0:7766f6712673 714 if (in_end == netif->loop_last) {
yueee_yt 0:7766f6712673 715 /* this was the last pbuf in the list */
yueee_yt 0:7766f6712673 716 netif->loop_first = netif->loop_last = NULL;
yueee_yt 0:7766f6712673 717 } else {
yueee_yt 0:7766f6712673 718 /* pop the pbuf off the list */
yueee_yt 0:7766f6712673 719 netif->loop_first = in_end->next;
yueee_yt 0:7766f6712673 720 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
yueee_yt 0:7766f6712673 721 }
yueee_yt 0:7766f6712673 722 /* De-queue the pbuf from its successors on the 'loop_' list. */
yueee_yt 0:7766f6712673 723 in_end->next = NULL;
yueee_yt 0:7766f6712673 724 }
yueee_yt 0:7766f6712673 725 SYS_ARCH_UNPROTECT(lev);
yueee_yt 0:7766f6712673 726
yueee_yt 0:7766f6712673 727 if (in != NULL) {
yueee_yt 0:7766f6712673 728 LINK_STATS_INC(link.recv);
yueee_yt 0:7766f6712673 729 snmp_add_ifinoctets(stats_if, in->tot_len);
yueee_yt 0:7766f6712673 730 snmp_inc_ifinucastpkts(stats_if);
yueee_yt 0:7766f6712673 731 /* loopback packets are always IP packets! */
yueee_yt 0:7766f6712673 732 if (ip_input(in, netif) != ERR_OK) {
yueee_yt 0:7766f6712673 733 pbuf_free(in);
yueee_yt 0:7766f6712673 734 }
yueee_yt 0:7766f6712673 735 /* Don't reference the packet any more! */
yueee_yt 0:7766f6712673 736 in = NULL;
yueee_yt 0:7766f6712673 737 }
yueee_yt 0:7766f6712673 738 /* go on while there is a packet on the list */
yueee_yt 0:7766f6712673 739 } while (netif->loop_first != NULL);
yueee_yt 0:7766f6712673 740 }
yueee_yt 0:7766f6712673 741
yueee_yt 0:7766f6712673 742 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
yueee_yt 0:7766f6712673 743 /**
yueee_yt 0:7766f6712673 744 * Calls netif_poll() for every netif on the netif_list.
yueee_yt 0:7766f6712673 745 */
yueee_yt 0:7766f6712673 746 void
yueee_yt 0:7766f6712673 747 netif_poll_all(void)
yueee_yt 0:7766f6712673 748 {
yueee_yt 0:7766f6712673 749 struct netif *netif = netif_list;
yueee_yt 0:7766f6712673 750 /* loop through netifs */
yueee_yt 0:7766f6712673 751 while (netif != NULL) {
yueee_yt 0:7766f6712673 752 netif_poll(netif);
yueee_yt 0:7766f6712673 753 /* proceed to next network interface */
yueee_yt 0:7766f6712673 754 netif = netif->next;
yueee_yt 0:7766f6712673 755 }
yueee_yt 0:7766f6712673 756 }
yueee_yt 0:7766f6712673 757 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
yueee_yt 0:7766f6712673 758 #endif /* ENABLE_LOOPBACK */