CK Sin / Mbed 2 deprecated Ethernetwebsocket

Ethernetwebsoc

Dependencies:   C12832_lcd LM75B WebSocketClient mbed-rtos mbed Socket lwip-eth lwip-sys lwip

EthernetInterface/lwip/core/netif.c@0:0ed2a7c7190c, 2013-05-31 (annotated)

Committer:
GordonSin
Date:
Fri May 31 04:09:54 2013 +0000
Revision:
0:0ed2a7c7190c
31/5/2013;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GordonSin 0:0ed2a7c7190c 1 /**
GordonSin 0:0ed2a7c7190c 2 * @file
GordonSin 0:0ed2a7c7190c 3 * lwIP network interface abstraction
GordonSin 0:0ed2a7c7190c 4 *
GordonSin 0:0ed2a7c7190c 5 */
GordonSin 0:0ed2a7c7190c 6
GordonSin 0:0ed2a7c7190c 7 /*
GordonSin 0:0ed2a7c7190c 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
GordonSin 0:0ed2a7c7190c 9 * All rights reserved.
GordonSin 0:0ed2a7c7190c 10 *
GordonSin 0:0ed2a7c7190c 11 * Redistribution and use in source and binary forms, with or without modification,
GordonSin 0:0ed2a7c7190c 12 * are permitted provided that the following conditions are met:
GordonSin 0:0ed2a7c7190c 13 *
GordonSin 0:0ed2a7c7190c 14 * 1. Redistributions of source code must retain the above copyright notice,
GordonSin 0:0ed2a7c7190c 15 * this list of conditions and the following disclaimer.
GordonSin 0:0ed2a7c7190c 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
GordonSin 0:0ed2a7c7190c 17 * this list of conditions and the following disclaimer in the documentation
GordonSin 0:0ed2a7c7190c 18 * and/or other materials provided with the distribution.
GordonSin 0:0ed2a7c7190c 19 * 3. The name of the author may not be used to endorse or promote products
GordonSin 0:0ed2a7c7190c 20 * derived from this software without specific prior written permission.
GordonSin 0:0ed2a7c7190c 21 *
GordonSin 0:0ed2a7c7190c 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
GordonSin 0:0ed2a7c7190c 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
GordonSin 0:0ed2a7c7190c 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
GordonSin 0:0ed2a7c7190c 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
GordonSin 0:0ed2a7c7190c 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
GordonSin 0:0ed2a7c7190c 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
GordonSin 0:0ed2a7c7190c 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
GordonSin 0:0ed2a7c7190c 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
GordonSin 0:0ed2a7c7190c 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
GordonSin 0:0ed2a7c7190c 31 * OF SUCH DAMAGE.
GordonSin 0:0ed2a7c7190c 32 *
GordonSin 0:0ed2a7c7190c 33 * This file is part of the lwIP TCP/IP stack.
GordonSin 0:0ed2a7c7190c 34 *
GordonSin 0:0ed2a7c7190c 35 * Author: Adam Dunkels <adam@sics.se>
GordonSin 0:0ed2a7c7190c 36 *
GordonSin 0:0ed2a7c7190c 37 */
GordonSin 0:0ed2a7c7190c 38
GordonSin 0:0ed2a7c7190c 39 #include "lwip/opt.h"
GordonSin 0:0ed2a7c7190c 40
GordonSin 0:0ed2a7c7190c 41 #include "lwip/def.h"
GordonSin 0:0ed2a7c7190c 42 #include "lwip/ip_addr.h"
GordonSin 0:0ed2a7c7190c 43 #include "lwip/netif.h"
GordonSin 0:0ed2a7c7190c 44 #include "lwip/tcp_impl.h"
GordonSin 0:0ed2a7c7190c 45 #include "lwip/snmp.h"
GordonSin 0:0ed2a7c7190c 46 #include "lwip/igmp.h"
GordonSin 0:0ed2a7c7190c 47 #include "netif/etharp.h"
GordonSin 0:0ed2a7c7190c 48 #include "lwip/stats.h"
GordonSin 0:0ed2a7c7190c 49 #if ENABLE_LOOPBACK
GordonSin 0:0ed2a7c7190c 50 #include "lwip/sys.h"
GordonSin 0:0ed2a7c7190c 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
GordonSin 0:0ed2a7c7190c 52 #include "lwip/tcpip.h"
GordonSin 0:0ed2a7c7190c 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
GordonSin 0:0ed2a7c7190c 54 #endif /* ENABLE_LOOPBACK */
GordonSin 0:0ed2a7c7190c 55
GordonSin 0:0ed2a7c7190c 56 #if LWIP_AUTOIP
GordonSin 0:0ed2a7c7190c 57 #include "lwip/autoip.h"
GordonSin 0:0ed2a7c7190c 58 #endif /* LWIP_AUTOIP */
GordonSin 0:0ed2a7c7190c 59 #if LWIP_DHCP
GordonSin 0:0ed2a7c7190c 60 #include "lwip/dhcp.h"
GordonSin 0:0ed2a7c7190c 61 #endif /* LWIP_DHCP */
GordonSin 0:0ed2a7c7190c 62
GordonSin 0:0ed2a7c7190c 63 #if LWIP_NETIF_STATUS_CALLBACK
GordonSin 0:0ed2a7c7190c 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
GordonSin 0:0ed2a7c7190c 65 #else
GordonSin 0:0ed2a7c7190c 66 #define NETIF_STATUS_CALLBACK(n)
GordonSin 0:0ed2a7c7190c 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
GordonSin 0:0ed2a7c7190c 68
GordonSin 0:0ed2a7c7190c 69 #if LWIP_NETIF_LINK_CALLBACK
GordonSin 0:0ed2a7c7190c 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
GordonSin 0:0ed2a7c7190c 71 #else
GordonSin 0:0ed2a7c7190c 72 #define NETIF_LINK_CALLBACK(n)
GordonSin 0:0ed2a7c7190c 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
GordonSin 0:0ed2a7c7190c 74
GordonSin 0:0ed2a7c7190c 75 struct netif *netif_list;
GordonSin 0:0ed2a7c7190c 76 struct netif *netif_default;
GordonSin 0:0ed2a7c7190c 77
GordonSin 0:0ed2a7c7190c 78 #if LWIP_HAVE_LOOPIF
GordonSin 0:0ed2a7c7190c 79 static struct netif loop_netif;
GordonSin 0:0ed2a7c7190c 80
GordonSin 0:0ed2a7c7190c 81 /**
GordonSin 0:0ed2a7c7190c 82 * Initialize a lwip network interface structure for a loopback interface
GordonSin 0:0ed2a7c7190c 83 *
GordonSin 0:0ed2a7c7190c 84 * @param netif the lwip network interface structure for this loopif
GordonSin 0:0ed2a7c7190c 85 * @return ERR_OK if the loopif is initialized
GordonSin 0:0ed2a7c7190c 86 * ERR_MEM if private data couldn't be allocated
GordonSin 0:0ed2a7c7190c 87 */
GordonSin 0:0ed2a7c7190c 88 static err_t
GordonSin 0:0ed2a7c7190c 89 netif_loopif_init(struct netif *netif)
GordonSin 0:0ed2a7c7190c 90 {
GordonSin 0:0ed2a7c7190c 91 /* initialize the snmp variables and counters inside the struct netif
GordonSin 0:0ed2a7c7190c 92 * ifSpeed: no assumption can be made!
GordonSin 0:0ed2a7c7190c 93 */
GordonSin 0:0ed2a7c7190c 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
GordonSin 0:0ed2a7c7190c 95
GordonSin 0:0ed2a7c7190c 96 netif->name[0] = 'l';
GordonSin 0:0ed2a7c7190c 97 netif->name[1] = 'o';
GordonSin 0:0ed2a7c7190c 98 netif->output = netif_loop_output;
GordonSin 0:0ed2a7c7190c 99 return ERR_OK;
GordonSin 0:0ed2a7c7190c 100 }
GordonSin 0:0ed2a7c7190c 101 #endif /* LWIP_HAVE_LOOPIF */
GordonSin 0:0ed2a7c7190c 102
GordonSin 0:0ed2a7c7190c 103 void
GordonSin 0:0ed2a7c7190c 104 netif_init(void)
GordonSin 0:0ed2a7c7190c 105 {
GordonSin 0:0ed2a7c7190c 106 #if LWIP_HAVE_LOOPIF
GordonSin 0:0ed2a7c7190c 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
GordonSin 0:0ed2a7c7190c 108 IP4_ADDR(&loop_gw, 127,0,0,1);
GordonSin 0:0ed2a7c7190c 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
GordonSin 0:0ed2a7c7190c 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
GordonSin 0:0ed2a7c7190c 111
GordonSin 0:0ed2a7c7190c 112 #if NO_SYS
GordonSin 0:0ed2a7c7190c 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
GordonSin 0:0ed2a7c7190c 114 #else /* NO_SYS */
GordonSin 0:0ed2a7c7190c 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
GordonSin 0:0ed2a7c7190c 116 #endif /* NO_SYS */
GordonSin 0:0ed2a7c7190c 117 netif_set_up(&loop_netif);
GordonSin 0:0ed2a7c7190c 118
GordonSin 0:0ed2a7c7190c 119 #endif /* LWIP_HAVE_LOOPIF */
GordonSin 0:0ed2a7c7190c 120 }
GordonSin 0:0ed2a7c7190c 121
GordonSin 0:0ed2a7c7190c 122 /**
GordonSin 0:0ed2a7c7190c 123 * Add a network interface to the list of lwIP netifs.
GordonSin 0:0ed2a7c7190c 124 *
GordonSin 0:0ed2a7c7190c 125 * @param netif a pre-allocated netif structure
GordonSin 0:0ed2a7c7190c 126 * @param ipaddr IP address for the new netif
GordonSin 0:0ed2a7c7190c 127 * @param netmask network mask for the new netif
GordonSin 0:0ed2a7c7190c 128 * @param gw default gateway IP address for the new netif
GordonSin 0:0ed2a7c7190c 129 * @param state opaque data passed to the new netif
GordonSin 0:0ed2a7c7190c 130 * @param init callback function that initializes the interface
GordonSin 0:0ed2a7c7190c 131 * @param input callback function that is called to pass
GordonSin 0:0ed2a7c7190c 132 * ingress packets up in the protocol layer stack.
GordonSin 0:0ed2a7c7190c 133 *
GordonSin 0:0ed2a7c7190c 134 * @return netif, or NULL if failed.
GordonSin 0:0ed2a7c7190c 135 */
GordonSin 0:0ed2a7c7190c 136 struct netif *
GordonSin 0:0ed2a7c7190c 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
GordonSin 0:0ed2a7c7190c 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
GordonSin 0:0ed2a7c7190c 139 {
GordonSin 0:0ed2a7c7190c 140 static u8_t netifnum = 0;
GordonSin 0:0ed2a7c7190c 141
GordonSin 0:0ed2a7c7190c 142 LWIP_ASSERT("No init function given", init != NULL);
GordonSin 0:0ed2a7c7190c 143
GordonSin 0:0ed2a7c7190c 144 /* reset new interface configuration state */
GordonSin 0:0ed2a7c7190c 145 ip_addr_set_zero(&netif->ip_addr);
GordonSin 0:0ed2a7c7190c 146 ip_addr_set_zero(&netif->netmask);
GordonSin 0:0ed2a7c7190c 147 ip_addr_set_zero(&netif->gw);
GordonSin 0:0ed2a7c7190c 148 netif->flags = 0;
GordonSin 0:0ed2a7c7190c 149 #if LWIP_DHCP
GordonSin 0:0ed2a7c7190c 150 /* netif not under DHCP control by default */
GordonSin 0:0ed2a7c7190c 151 netif->dhcp = NULL;
GordonSin 0:0ed2a7c7190c 152 #endif /* LWIP_DHCP */
GordonSin 0:0ed2a7c7190c 153 #if LWIP_AUTOIP
GordonSin 0:0ed2a7c7190c 154 /* netif not under AutoIP control by default */
GordonSin 0:0ed2a7c7190c 155 netif->autoip = NULL;
GordonSin 0:0ed2a7c7190c 156 #endif /* LWIP_AUTOIP */
GordonSin 0:0ed2a7c7190c 157 #if LWIP_NETIF_STATUS_CALLBACK
GordonSin 0:0ed2a7c7190c 158 netif->status_callback = NULL;
GordonSin 0:0ed2a7c7190c 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
GordonSin 0:0ed2a7c7190c 160 #if LWIP_NETIF_LINK_CALLBACK
GordonSin 0:0ed2a7c7190c 161 netif->link_callback = NULL;
GordonSin 0:0ed2a7c7190c 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
GordonSin 0:0ed2a7c7190c 163 #if LWIP_IGMP
GordonSin 0:0ed2a7c7190c 164 netif->igmp_mac_filter = NULL;
GordonSin 0:0ed2a7c7190c 165 #endif /* LWIP_IGMP */
GordonSin 0:0ed2a7c7190c 166 #if ENABLE_LOOPBACK
GordonSin 0:0ed2a7c7190c 167 netif->loop_first = NULL;
GordonSin 0:0ed2a7c7190c 168 netif->loop_last = NULL;
GordonSin 0:0ed2a7c7190c 169 #endif /* ENABLE_LOOPBACK */
GordonSin 0:0ed2a7c7190c 170
GordonSin 0:0ed2a7c7190c 171 /* remember netif specific state information data */
GordonSin 0:0ed2a7c7190c 172 netif->state = state;
GordonSin 0:0ed2a7c7190c 173 netif->num = netifnum++;
GordonSin 0:0ed2a7c7190c 174 netif->input = input;
GordonSin 0:0ed2a7c7190c 175 #if LWIP_NETIF_HWADDRHINT
GordonSin 0:0ed2a7c7190c 176 netif->addr_hint = NULL;
GordonSin 0:0ed2a7c7190c 177 #endif /* LWIP_NETIF_HWADDRHINT*/
GordonSin 0:0ed2a7c7190c 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
GordonSin 0:0ed2a7c7190c 179 netif->loop_cnt_current = 0;
GordonSin 0:0ed2a7c7190c 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
GordonSin 0:0ed2a7c7190c 181
GordonSin 0:0ed2a7c7190c 182 netif_set_addr(netif, ipaddr, netmask, gw);
GordonSin 0:0ed2a7c7190c 183
GordonSin 0:0ed2a7c7190c 184 /* call user specified initialization function for netif */
GordonSin 0:0ed2a7c7190c 185 if (init(netif) != ERR_OK) {
GordonSin 0:0ed2a7c7190c 186 return NULL;
GordonSin 0:0ed2a7c7190c 187 }
GordonSin 0:0ed2a7c7190c 188
GordonSin 0:0ed2a7c7190c 189 /* add this netif to the list */
GordonSin 0:0ed2a7c7190c 190 netif->next = netif_list;
GordonSin 0:0ed2a7c7190c 191 netif_list = netif;
GordonSin 0:0ed2a7c7190c 192 snmp_inc_iflist();
GordonSin 0:0ed2a7c7190c 193
GordonSin 0:0ed2a7c7190c 194 #if LWIP_IGMP
GordonSin 0:0ed2a7c7190c 195 /* start IGMP processing */
GordonSin 0:0ed2a7c7190c 196 if (netif->flags & NETIF_FLAG_IGMP) {
GordonSin 0:0ed2a7c7190c 197 igmp_start(netif);
GordonSin 0:0ed2a7c7190c 198 }
GordonSin 0:0ed2a7c7190c 199 #endif /* LWIP_IGMP */
GordonSin 0:0ed2a7c7190c 200
GordonSin 0:0ed2a7c7190c 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
GordonSin 0:0ed2a7c7190c 202 netif->name[0], netif->name[1]));
GordonSin 0:0ed2a7c7190c 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
GordonSin 0:0ed2a7c7190c 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
GordonSin 0:0ed2a7c7190c 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
GordonSin 0:0ed2a7c7190c 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
GordonSin 0:0ed2a7c7190c 207 ip_addr_debug_print(NETIF_DEBUG, gw);
GordonSin 0:0ed2a7c7190c 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
GordonSin 0:0ed2a7c7190c 209 return netif;
GordonSin 0:0ed2a7c7190c 210 }
GordonSin 0:0ed2a7c7190c 211
GordonSin 0:0ed2a7c7190c 212 /**
GordonSin 0:0ed2a7c7190c 213 * Change IP address configuration for a network interface (including netmask
GordonSin 0:0ed2a7c7190c 214 * and default gateway).
GordonSin 0:0ed2a7c7190c 215 *
GordonSin 0:0ed2a7c7190c 216 * @param netif the network interface to change
GordonSin 0:0ed2a7c7190c 217 * @param ipaddr the new IP address
GordonSin 0:0ed2a7c7190c 218 * @param netmask the new netmask
GordonSin 0:0ed2a7c7190c 219 * @param gw the new default gateway
GordonSin 0:0ed2a7c7190c 220 */
GordonSin 0:0ed2a7c7190c 221 void
GordonSin 0:0ed2a7c7190c 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
GordonSin 0:0ed2a7c7190c 223 ip_addr_t *gw)
GordonSin 0:0ed2a7c7190c 224 {
GordonSin 0:0ed2a7c7190c 225 netif_set_ipaddr(netif, ipaddr);
GordonSin 0:0ed2a7c7190c 226 netif_set_netmask(netif, netmask);
GordonSin 0:0ed2a7c7190c 227 netif_set_gw(netif, gw);
GordonSin 0:0ed2a7c7190c 228 }
GordonSin 0:0ed2a7c7190c 229
GordonSin 0:0ed2a7c7190c 230 /**
GordonSin 0:0ed2a7c7190c 231 * Remove a network interface from the list of lwIP netifs.
GordonSin 0:0ed2a7c7190c 232 *
GordonSin 0:0ed2a7c7190c 233 * @param netif the network interface to remove
GordonSin 0:0ed2a7c7190c 234 */
GordonSin 0:0ed2a7c7190c 235 void
GordonSin 0:0ed2a7c7190c 236 netif_remove(struct netif *netif)
GordonSin 0:0ed2a7c7190c 237 {
GordonSin 0:0ed2a7c7190c 238 if (netif == NULL) {
GordonSin 0:0ed2a7c7190c 239 return;
GordonSin 0:0ed2a7c7190c 240 }
GordonSin 0:0ed2a7c7190c 241
GordonSin 0:0ed2a7c7190c 242 #if LWIP_IGMP
GordonSin 0:0ed2a7c7190c 243 /* stop IGMP processing */
GordonSin 0:0ed2a7c7190c 244 if (netif->flags & NETIF_FLAG_IGMP) {
GordonSin 0:0ed2a7c7190c 245 igmp_stop(netif);
GordonSin 0:0ed2a7c7190c 246 }
GordonSin 0:0ed2a7c7190c 247 #endif /* LWIP_IGMP */
GordonSin 0:0ed2a7c7190c 248 if (netif_is_up(netif)) {
GordonSin 0:0ed2a7c7190c 249 /* set netif down before removing (call callback function) */
GordonSin 0:0ed2a7c7190c 250 netif_set_down(netif);
GordonSin 0:0ed2a7c7190c 251 }
GordonSin 0:0ed2a7c7190c 252
GordonSin 0:0ed2a7c7190c 253 snmp_delete_ipaddridx_tree(netif);
GordonSin 0:0ed2a7c7190c 254
GordonSin 0:0ed2a7c7190c 255 /* is it the first netif? */
GordonSin 0:0ed2a7c7190c 256 if (netif_list == netif) {
GordonSin 0:0ed2a7c7190c 257 netif_list = netif->next;
GordonSin 0:0ed2a7c7190c 258 } else {
GordonSin 0:0ed2a7c7190c 259 /* look for netif further down the list */
GordonSin 0:0ed2a7c7190c 260 struct netif * tmpNetif;
GordonSin 0:0ed2a7c7190c 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
GordonSin 0:0ed2a7c7190c 262 if (tmpNetif->next == netif) {
GordonSin 0:0ed2a7c7190c 263 tmpNetif->next = netif->next;
GordonSin 0:0ed2a7c7190c 264 break;
GordonSin 0:0ed2a7c7190c 265 }
GordonSin 0:0ed2a7c7190c 266 }
GordonSin 0:0ed2a7c7190c 267 if (tmpNetif == NULL)
GordonSin 0:0ed2a7c7190c 268 return; /* we didn't find any netif today */
GordonSin 0:0ed2a7c7190c 269 }
GordonSin 0:0ed2a7c7190c 270 snmp_dec_iflist();
GordonSin 0:0ed2a7c7190c 271 /* this netif is default? */
GordonSin 0:0ed2a7c7190c 272 if (netif_default == netif) {
GordonSin 0:0ed2a7c7190c 273 /* reset default netif */
GordonSin 0:0ed2a7c7190c 274 netif_set_default(NULL);
GordonSin 0:0ed2a7c7190c 275 }
GordonSin 0:0ed2a7c7190c 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
GordonSin 0:0ed2a7c7190c 277 }
GordonSin 0:0ed2a7c7190c 278
GordonSin 0:0ed2a7c7190c 279 /**
GordonSin 0:0ed2a7c7190c 280 * Find a network interface by searching for its name
GordonSin 0:0ed2a7c7190c 281 *
GordonSin 0:0ed2a7c7190c 282 * @param name the name of the netif (like netif->name) plus concatenated number
GordonSin 0:0ed2a7c7190c 283 * in ascii representation (e.g. 'en0')
GordonSin 0:0ed2a7c7190c 284 */
GordonSin 0:0ed2a7c7190c 285 struct netif *
GordonSin 0:0ed2a7c7190c 286 netif_find(char *name)
GordonSin 0:0ed2a7c7190c 287 {
GordonSin 0:0ed2a7c7190c 288 struct netif *netif;
GordonSin 0:0ed2a7c7190c 289 u8_t num;
GordonSin 0:0ed2a7c7190c 290
GordonSin 0:0ed2a7c7190c 291 if (name == NULL) {
GordonSin 0:0ed2a7c7190c 292 return NULL;
GordonSin 0:0ed2a7c7190c 293 }
GordonSin 0:0ed2a7c7190c 294
GordonSin 0:0ed2a7c7190c 295 num = name[2] - '0';
GordonSin 0:0ed2a7c7190c 296
GordonSin 0:0ed2a7c7190c 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
GordonSin 0:0ed2a7c7190c 298 if (num == netif->num &&
GordonSin 0:0ed2a7c7190c 299 name[0] == netif->name[0] &&
GordonSin 0:0ed2a7c7190c 300 name[1] == netif->name[1]) {
GordonSin 0:0ed2a7c7190c 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
GordonSin 0:0ed2a7c7190c 302 return netif;
GordonSin 0:0ed2a7c7190c 303 }
GordonSin 0:0ed2a7c7190c 304 }
GordonSin 0:0ed2a7c7190c 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
GordonSin 0:0ed2a7c7190c 306 return NULL;
GordonSin 0:0ed2a7c7190c 307 }
GordonSin 0:0ed2a7c7190c 308
GordonSin 0:0ed2a7c7190c 309 /**
GordonSin 0:0ed2a7c7190c 310 * Change the IP address of a network interface
GordonSin 0:0ed2a7c7190c 311 *
GordonSin 0:0ed2a7c7190c 312 * @param netif the network interface to change
GordonSin 0:0ed2a7c7190c 313 * @param ipaddr the new IP address
GordonSin 0:0ed2a7c7190c 314 *
GordonSin 0:0ed2a7c7190c 315 * @note call netif_set_addr() if you also want to change netmask and
GordonSin 0:0ed2a7c7190c 316 * default gateway
GordonSin 0:0ed2a7c7190c 317 */
GordonSin 0:0ed2a7c7190c 318 void
GordonSin 0:0ed2a7c7190c 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
GordonSin 0:0ed2a7c7190c 320 {
GordonSin 0:0ed2a7c7190c 321 /* TODO: Handling of obsolete pcbs */
GordonSin 0:0ed2a7c7190c 322 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
GordonSin 0:0ed2a7c7190c 323 #if LWIP_TCP
GordonSin 0:0ed2a7c7190c 324 struct tcp_pcb *pcb;
GordonSin 0:0ed2a7c7190c 325 struct tcp_pcb_listen *lpcb;
GordonSin 0:0ed2a7c7190c 326
GordonSin 0:0ed2a7c7190c 327 /* address is actually being changed? */
GordonSin 0:0ed2a7c7190c 328 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
GordonSin 0:0ed2a7c7190c 329 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
GordonSin 0:0ed2a7c7190c 330 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
GordonSin 0:0ed2a7c7190c 331 pcb = tcp_active_pcbs;
GordonSin 0:0ed2a7c7190c 332 while (pcb != NULL) {
GordonSin 0:0ed2a7c7190c 333 /* PCB bound to current local interface address? */
GordonSin 0:0ed2a7c7190c 334 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
GordonSin 0:0ed2a7c7190c 335 #if LWIP_AUTOIP
GordonSin 0:0ed2a7c7190c 336 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
GordonSin 0:0ed2a7c7190c 337 && !ip_addr_islinklocal(&(pcb->local_ip))
GordonSin 0:0ed2a7c7190c 338 #endif /* LWIP_AUTOIP */
GordonSin 0:0ed2a7c7190c 339 ) {
GordonSin 0:0ed2a7c7190c 340 /* this connection must be aborted */
GordonSin 0:0ed2a7c7190c 341 struct tcp_pcb *next = pcb->next;
GordonSin 0:0ed2a7c7190c 342 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
GordonSin 0:0ed2a7c7190c 343 tcp_abort(pcb);
GordonSin 0:0ed2a7c7190c 344 pcb = next;
GordonSin 0:0ed2a7c7190c 345 } else {
GordonSin 0:0ed2a7c7190c 346 pcb = pcb->next;
GordonSin 0:0ed2a7c7190c 347 }
GordonSin 0:0ed2a7c7190c 348 }
GordonSin 0:0ed2a7c7190c 349 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
GordonSin 0:0ed2a7c7190c 350 /* PCB bound to current local interface address? */
GordonSin 0:0ed2a7c7190c 351 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
GordonSin 0:0ed2a7c7190c 352 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
GordonSin 0:0ed2a7c7190c 353 /* The PCB is listening to the old ipaddr and
GordonSin 0:0ed2a7c7190c 354 * is set to listen to the new one instead */
GordonSin 0:0ed2a7c7190c 355 ip_addr_set(&(lpcb->local_ip), ipaddr);
GordonSin 0:0ed2a7c7190c 356 }
GordonSin 0:0ed2a7c7190c 357 }
GordonSin 0:0ed2a7c7190c 358 }
GordonSin 0:0ed2a7c7190c 359 #endif
GordonSin 0:0ed2a7c7190c 360 snmp_delete_ipaddridx_tree(netif);
GordonSin 0:0ed2a7c7190c 361 snmp_delete_iprteidx_tree(0,netif);
GordonSin 0:0ed2a7c7190c 362 /* set new IP address to netif */
GordonSin 0:0ed2a7c7190c 363 ip_addr_set(&(netif->ip_addr), ipaddr);
GordonSin 0:0ed2a7c7190c 364 snmp_insert_ipaddridx_tree(netif);
GordonSin 0:0ed2a7c7190c 365 snmp_insert_iprteidx_tree(0,netif);
GordonSin 0:0ed2a7c7190c 366
GordonSin 0:0ed2a7c7190c 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",
GordonSin 0:0ed2a7c7190c 368 netif->name[0], netif->name[1],
GordonSin 0:0ed2a7c7190c 369 ip4_addr1_16(&netif->ip_addr),
GordonSin 0:0ed2a7c7190c 370 ip4_addr2_16(&netif->ip_addr),
GordonSin 0:0ed2a7c7190c 371 ip4_addr3_16(&netif->ip_addr),
GordonSin 0:0ed2a7c7190c 372 ip4_addr4_16(&netif->ip_addr)));
GordonSin 0:0ed2a7c7190c 373 }
GordonSin 0:0ed2a7c7190c 374
GordonSin 0:0ed2a7c7190c 375 /**
GordonSin 0:0ed2a7c7190c 376 * Change the default gateway for a network interface
GordonSin 0:0ed2a7c7190c 377 *
GordonSin 0:0ed2a7c7190c 378 * @param netif the network interface to change
GordonSin 0:0ed2a7c7190c 379 * @param gw the new default gateway
GordonSin 0:0ed2a7c7190c 380 *
GordonSin 0:0ed2a7c7190c 381 * @note call netif_set_addr() if you also want to change ip address and netmask
GordonSin 0:0ed2a7c7190c 382 */
GordonSin 0:0ed2a7c7190c 383 void
GordonSin 0:0ed2a7c7190c 384 netif_set_gw(struct netif *netif, ip_addr_t *gw)
GordonSin 0:0ed2a7c7190c 385 {
GordonSin 0:0ed2a7c7190c 386 ip_addr_set(&(netif->gw), gw);
GordonSin 0:0ed2a7c7190c 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",
GordonSin 0:0ed2a7c7190c 388 netif->name[0], netif->name[1],
GordonSin 0:0ed2a7c7190c 389 ip4_addr1_16(&netif->gw),
GordonSin 0:0ed2a7c7190c 390 ip4_addr2_16(&netif->gw),
GordonSin 0:0ed2a7c7190c 391 ip4_addr3_16(&netif->gw),
GordonSin 0:0ed2a7c7190c 392 ip4_addr4_16(&netif->gw)));
GordonSin 0:0ed2a7c7190c 393 }
GordonSin 0:0ed2a7c7190c 394
GordonSin 0:0ed2a7c7190c 395 /**
GordonSin 0:0ed2a7c7190c 396 * Change the netmask of a network interface
GordonSin 0:0ed2a7c7190c 397 *
GordonSin 0:0ed2a7c7190c 398 * @param netif the network interface to change
GordonSin 0:0ed2a7c7190c 399 * @param netmask the new netmask
GordonSin 0:0ed2a7c7190c 400 *
GordonSin 0:0ed2a7c7190c 401 * @note call netif_set_addr() if you also want to change ip address and
GordonSin 0:0ed2a7c7190c 402 * default gateway
GordonSin 0:0ed2a7c7190c 403 */
GordonSin 0:0ed2a7c7190c 404 void
GordonSin 0:0ed2a7c7190c 405 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
GordonSin 0:0ed2a7c7190c 406 {
GordonSin 0:0ed2a7c7190c 407 snmp_delete_iprteidx_tree(0, netif);
GordonSin 0:0ed2a7c7190c 408 /* set new netmask to netif */
GordonSin 0:0ed2a7c7190c 409 ip_addr_set(&(netif->netmask), netmask);
GordonSin 0:0ed2a7c7190c 410 snmp_insert_iprteidx_tree(0, netif);
GordonSin 0:0ed2a7c7190c 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",
GordonSin 0:0ed2a7c7190c 412 netif->name[0], netif->name[1],
GordonSin 0:0ed2a7c7190c 413 ip4_addr1_16(&netif->netmask),
GordonSin 0:0ed2a7c7190c 414 ip4_addr2_16(&netif->netmask),
GordonSin 0:0ed2a7c7190c 415 ip4_addr3_16(&netif->netmask),
GordonSin 0:0ed2a7c7190c 416 ip4_addr4_16(&netif->netmask)));
GordonSin 0:0ed2a7c7190c 417 }
GordonSin 0:0ed2a7c7190c 418
GordonSin 0:0ed2a7c7190c 419 /**
GordonSin 0:0ed2a7c7190c 420 * Set a network interface as the default network interface
GordonSin 0:0ed2a7c7190c 421 * (used to output all packets for which no specific route is found)
GordonSin 0:0ed2a7c7190c 422 *
GordonSin 0:0ed2a7c7190c 423 * @param netif the default network interface
GordonSin 0:0ed2a7c7190c 424 */
GordonSin 0:0ed2a7c7190c 425 void
GordonSin 0:0ed2a7c7190c 426 netif_set_default(struct netif *netif)
GordonSin 0:0ed2a7c7190c 427 {
GordonSin 0:0ed2a7c7190c 428 if (netif == NULL) {
GordonSin 0:0ed2a7c7190c 429 /* remove default route */
GordonSin 0:0ed2a7c7190c 430 snmp_delete_iprteidx_tree(1, netif);
GordonSin 0:0ed2a7c7190c 431 } else {
GordonSin 0:0ed2a7c7190c 432 /* install default route */
GordonSin 0:0ed2a7c7190c 433 snmp_insert_iprteidx_tree(1, netif);
GordonSin 0:0ed2a7c7190c 434 }
GordonSin 0:0ed2a7c7190c 435 netif_default = netif;
GordonSin 0:0ed2a7c7190c 436 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
GordonSin 0:0ed2a7c7190c 437 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
GordonSin 0:0ed2a7c7190c 438 }
GordonSin 0:0ed2a7c7190c 439
GordonSin 0:0ed2a7c7190c 440 /**
GordonSin 0:0ed2a7c7190c 441 * Bring an interface up, available for processing
GordonSin 0:0ed2a7c7190c 442 * traffic.
GordonSin 0:0ed2a7c7190c 443 *
GordonSin 0:0ed2a7c7190c 444 * @note: Enabling DHCP on a down interface will make it come
GordonSin 0:0ed2a7c7190c 445 * up once configured.
GordonSin 0:0ed2a7c7190c 446 *
GordonSin 0:0ed2a7c7190c 447 * @see dhcp_start()
GordonSin 0:0ed2a7c7190c 448 */
GordonSin 0:0ed2a7c7190c 449 void netif_set_up(struct netif *netif)
GordonSin 0:0ed2a7c7190c 450 {
GordonSin 0:0ed2a7c7190c 451 if (!(netif->flags & NETIF_FLAG_UP)) {
GordonSin 0:0ed2a7c7190c 452 netif->flags |= NETIF_FLAG_UP;
GordonSin 0:0ed2a7c7190c 453
GordonSin 0:0ed2a7c7190c 454 #if LWIP_SNMP
GordonSin 0:0ed2a7c7190c 455 snmp_get_sysuptime(&netif->ts);
GordonSin 0:0ed2a7c7190c 456 #endif /* LWIP_SNMP */
GordonSin 0:0ed2a7c7190c 457
GordonSin 0:0ed2a7c7190c 458 NETIF_STATUS_CALLBACK(netif);
GordonSin 0:0ed2a7c7190c 459
GordonSin 0:0ed2a7c7190c 460 if (netif->flags & NETIF_FLAG_LINK_UP) {
GordonSin 0:0ed2a7c7190c 461 #if LWIP_ARP
GordonSin 0:0ed2a7c7190c 462 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
GordonSin 0:0ed2a7c7190c 463 if (netif->flags & (NETIF_FLAG_ETHARP)) {
GordonSin 0:0ed2a7c7190c 464 etharp_gratuitous(netif);
GordonSin 0:0ed2a7c7190c 465 }
GordonSin 0:0ed2a7c7190c 466 #endif /* LWIP_ARP */
GordonSin 0:0ed2a7c7190c 467
GordonSin 0:0ed2a7c7190c 468 #if LWIP_IGMP
GordonSin 0:0ed2a7c7190c 469 /* resend IGMP memberships */
GordonSin 0:0ed2a7c7190c 470 if (netif->flags & NETIF_FLAG_IGMP) {
GordonSin 0:0ed2a7c7190c 471 igmp_report_groups( netif);
GordonSin 0:0ed2a7c7190c 472 }
GordonSin 0:0ed2a7c7190c 473 #endif /* LWIP_IGMP */
GordonSin 0:0ed2a7c7190c 474 }
GordonSin 0:0ed2a7c7190c 475 }
GordonSin 0:0ed2a7c7190c 476 }
GordonSin 0:0ed2a7c7190c 477
GordonSin 0:0ed2a7c7190c 478 /**
GordonSin 0:0ed2a7c7190c 479 * Bring an interface down, disabling any traffic processing.
GordonSin 0:0ed2a7c7190c 480 *
GordonSin 0:0ed2a7c7190c 481 * @note: Enabling DHCP on a down interface will make it come
GordonSin 0:0ed2a7c7190c 482 * up once configured.
GordonSin 0:0ed2a7c7190c 483 *
GordonSin 0:0ed2a7c7190c 484 * @see dhcp_start()
GordonSin 0:0ed2a7c7190c 485 */
GordonSin 0:0ed2a7c7190c 486 void netif_set_down(struct netif *netif)
GordonSin 0:0ed2a7c7190c 487 {
GordonSin 0:0ed2a7c7190c 488 if (netif->flags & NETIF_FLAG_UP) {
GordonSin 0:0ed2a7c7190c 489 netif->flags &= ~NETIF_FLAG_UP;
GordonSin 0:0ed2a7c7190c 490 #if LWIP_SNMP
GordonSin 0:0ed2a7c7190c 491 snmp_get_sysuptime(&netif->ts);
GordonSin 0:0ed2a7c7190c 492 #endif
GordonSin 0:0ed2a7c7190c 493
GordonSin 0:0ed2a7c7190c 494 NETIF_STATUS_CALLBACK(netif);
GordonSin 0:0ed2a7c7190c 495 }
GordonSin 0:0ed2a7c7190c 496 }
GordonSin 0:0ed2a7c7190c 497
GordonSin 0:0ed2a7c7190c 498 #if LWIP_NETIF_STATUS_CALLBACK
GordonSin 0:0ed2a7c7190c 499 /**
GordonSin 0:0ed2a7c7190c 500 * Set callback to be called when interface is brought up/down
GordonSin 0:0ed2a7c7190c 501 */
GordonSin 0:0ed2a7c7190c 502 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
GordonSin 0:0ed2a7c7190c 503 {
GordonSin 0:0ed2a7c7190c 504 if (netif) {
GordonSin 0:0ed2a7c7190c 505 netif->status_callback = status_callback;
GordonSin 0:0ed2a7c7190c 506 }
GordonSin 0:0ed2a7c7190c 507 }
GordonSin 0:0ed2a7c7190c 508 #endif /* LWIP_NETIF_STATUS_CALLBACK */
GordonSin 0:0ed2a7c7190c 509
GordonSin 0:0ed2a7c7190c 510 /**
GordonSin 0:0ed2a7c7190c 511 * Called by a driver when its link goes up
GordonSin 0:0ed2a7c7190c 512 */
GordonSin 0:0ed2a7c7190c 513 void netif_set_link_up(struct netif *netif )
GordonSin 0:0ed2a7c7190c 514 {
GordonSin 0:0ed2a7c7190c 515 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
GordonSin 0:0ed2a7c7190c 516 netif->flags |= NETIF_FLAG_LINK_UP;
GordonSin 0:0ed2a7c7190c 517
GordonSin 0:0ed2a7c7190c 518 #if LWIP_DHCP
GordonSin 0:0ed2a7c7190c 519 if (netif->dhcp) {
GordonSin 0:0ed2a7c7190c 520 dhcp_network_changed(netif);
GordonSin 0:0ed2a7c7190c 521 }
GordonSin 0:0ed2a7c7190c 522 #endif /* LWIP_DHCP */
GordonSin 0:0ed2a7c7190c 523
GordonSin 0:0ed2a7c7190c 524 #if LWIP_AUTOIP
GordonSin 0:0ed2a7c7190c 525 if (netif->autoip) {
GordonSin 0:0ed2a7c7190c 526 autoip_network_changed(netif);
GordonSin 0:0ed2a7c7190c 527 }
GordonSin 0:0ed2a7c7190c 528 #endif /* LWIP_AUTOIP */
GordonSin 0:0ed2a7c7190c 529
GordonSin 0:0ed2a7c7190c 530 if (netif->flags & NETIF_FLAG_UP) {
GordonSin 0:0ed2a7c7190c 531 #if LWIP_ARP
GordonSin 0:0ed2a7c7190c 532 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
GordonSin 0:0ed2a7c7190c 533 if (netif->flags & NETIF_FLAG_ETHARP) {
GordonSin 0:0ed2a7c7190c 534 etharp_gratuitous(netif);
GordonSin 0:0ed2a7c7190c 535 }
GordonSin 0:0ed2a7c7190c 536 #endif /* LWIP_ARP */
GordonSin 0:0ed2a7c7190c 537
GordonSin 0:0ed2a7c7190c 538 #if LWIP_IGMP
GordonSin 0:0ed2a7c7190c 539 /* resend IGMP memberships */
GordonSin 0:0ed2a7c7190c 540 if (netif->flags & NETIF_FLAG_IGMP) {
GordonSin 0:0ed2a7c7190c 541 igmp_report_groups( netif);
GordonSin 0:0ed2a7c7190c 542 }
GordonSin 0:0ed2a7c7190c 543 #endif /* LWIP_IGMP */
GordonSin 0:0ed2a7c7190c 544 }
GordonSin 0:0ed2a7c7190c 545 NETIF_LINK_CALLBACK(netif);
GordonSin 0:0ed2a7c7190c 546 }
GordonSin 0:0ed2a7c7190c 547 }
GordonSin 0:0ed2a7c7190c 548
GordonSin 0:0ed2a7c7190c 549 /**
GordonSin 0:0ed2a7c7190c 550 * Called by a driver when its link goes down
GordonSin 0:0ed2a7c7190c 551 */
GordonSin 0:0ed2a7c7190c 552 void netif_set_link_down(struct netif *netif )
GordonSin 0:0ed2a7c7190c 553 {
GordonSin 0:0ed2a7c7190c 554 if (netif->flags & NETIF_FLAG_LINK_UP) {
GordonSin 0:0ed2a7c7190c 555 netif->flags &= ~NETIF_FLAG_LINK_UP;
GordonSin 0:0ed2a7c7190c 556 NETIF_LINK_CALLBACK(netif);
GordonSin 0:0ed2a7c7190c 557 }
GordonSin 0:0ed2a7c7190c 558 }
GordonSin 0:0ed2a7c7190c 559
GordonSin 0:0ed2a7c7190c 560 #if LWIP_NETIF_LINK_CALLBACK
GordonSin 0:0ed2a7c7190c 561 /**
GordonSin 0:0ed2a7c7190c 562 * Set callback to be called when link is brought up/down
GordonSin 0:0ed2a7c7190c 563 */
GordonSin 0:0ed2a7c7190c 564 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
GordonSin 0:0ed2a7c7190c 565 {
GordonSin 0:0ed2a7c7190c 566 if (netif) {
GordonSin 0:0ed2a7c7190c 567 netif->link_callback = link_callback;
GordonSin 0:0ed2a7c7190c 568 }
GordonSin 0:0ed2a7c7190c 569 }
GordonSin 0:0ed2a7c7190c 570 #endif /* LWIP_NETIF_LINK_CALLBACK */
GordonSin 0:0ed2a7c7190c 571
GordonSin 0:0ed2a7c7190c 572 #if ENABLE_LOOPBACK
GordonSin 0:0ed2a7c7190c 573 /**
GordonSin 0:0ed2a7c7190c 574 * Send an IP packet to be received on the same netif (loopif-like).
GordonSin 0:0ed2a7c7190c 575 * The pbuf is simply copied and handed back to netif->input.
GordonSin 0:0ed2a7c7190c 576 * In multithreaded mode, this is done directly since netif->input must put
GordonSin 0:0ed2a7c7190c 577 * the packet on a queue.
GordonSin 0:0ed2a7c7190c 578 * In callback mode, the packet is put on an internal queue and is fed to
GordonSin 0:0ed2a7c7190c 579 * netif->input by netif_poll().
GordonSin 0:0ed2a7c7190c 580 *
GordonSin 0:0ed2a7c7190c 581 * @param netif the lwip network interface structure
GordonSin 0:0ed2a7c7190c 582 * @param p the (IP) packet to 'send'
GordonSin 0:0ed2a7c7190c 583 * @param ipaddr the ip address to send the packet to (not used)
GordonSin 0:0ed2a7c7190c 584 * @return ERR_OK if the packet has been sent
GordonSin 0:0ed2a7c7190c 585 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
GordonSin 0:0ed2a7c7190c 586 */
GordonSin 0:0ed2a7c7190c 587 err_t
GordonSin 0:0ed2a7c7190c 588 netif_loop_output(struct netif *netif, struct pbuf *p,
GordonSin 0:0ed2a7c7190c 589 ip_addr_t *ipaddr)
GordonSin 0:0ed2a7c7190c 590 {
GordonSin 0:0ed2a7c7190c 591 struct pbuf *r;
GordonSin 0:0ed2a7c7190c 592 err_t err;
GordonSin 0:0ed2a7c7190c 593 struct pbuf *last;
GordonSin 0:0ed2a7c7190c 594 #if LWIP_LOOPBACK_MAX_PBUFS
GordonSin 0:0ed2a7c7190c 595 u8_t clen = 0;
GordonSin 0:0ed2a7c7190c 596 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
GordonSin 0:0ed2a7c7190c 597 /* If we have a loopif, SNMP counters are adjusted for it,
GordonSin 0:0ed2a7c7190c 598 * if not they are adjusted for 'netif'. */
GordonSin 0:0ed2a7c7190c 599 #if LWIP_SNMP
GordonSin 0:0ed2a7c7190c 600 #if LWIP_HAVE_LOOPIF
GordonSin 0:0ed2a7c7190c 601 struct netif *stats_if = &loop_netif;
GordonSin 0:0ed2a7c7190c 602 #else /* LWIP_HAVE_LOOPIF */
GordonSin 0:0ed2a7c7190c 603 struct netif *stats_if = netif;
GordonSin 0:0ed2a7c7190c 604 #endif /* LWIP_HAVE_LOOPIF */
GordonSin 0:0ed2a7c7190c 605 #endif /* LWIP_SNMP */
GordonSin 0:0ed2a7c7190c 606 SYS_ARCH_DECL_PROTECT(lev);
GordonSin 0:0ed2a7c7190c 607 LWIP_UNUSED_ARG(ipaddr);
GordonSin 0:0ed2a7c7190c 608
GordonSin 0:0ed2a7c7190c 609 /* Allocate a new pbuf */
GordonSin 0:0ed2a7c7190c 610 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
GordonSin 0:0ed2a7c7190c 611 if (r == NULL) {
GordonSin 0:0ed2a7c7190c 612 LINK_STATS_INC(link.memerr);
GordonSin 0:0ed2a7c7190c 613 LINK_STATS_INC(link.drop);
GordonSin 0:0ed2a7c7190c 614 snmp_inc_ifoutdiscards(stats_if);
GordonSin 0:0ed2a7c7190c 615 return ERR_MEM;
GordonSin 0:0ed2a7c7190c 616 }
GordonSin 0:0ed2a7c7190c 617 #if LWIP_LOOPBACK_MAX_PBUFS
GordonSin 0:0ed2a7c7190c 618 clen = pbuf_clen(r);
GordonSin 0:0ed2a7c7190c 619 /* check for overflow or too many pbuf on queue */
GordonSin 0:0ed2a7c7190c 620 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
GordonSin 0:0ed2a7c7190c 621 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
GordonSin 0:0ed2a7c7190c 622 pbuf_free(r);
GordonSin 0:0ed2a7c7190c 623 LINK_STATS_INC(link.memerr);
GordonSin 0:0ed2a7c7190c 624 LINK_STATS_INC(link.drop);
GordonSin 0:0ed2a7c7190c 625 snmp_inc_ifoutdiscards(stats_if);
GordonSin 0:0ed2a7c7190c 626 return ERR_MEM;
GordonSin 0:0ed2a7c7190c 627 }
GordonSin 0:0ed2a7c7190c 628 netif->loop_cnt_current += clen;
GordonSin 0:0ed2a7c7190c 629 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
GordonSin 0:0ed2a7c7190c 630
GordonSin 0:0ed2a7c7190c 631 /* Copy the whole pbuf queue p into the single pbuf r */
GordonSin 0:0ed2a7c7190c 632 if ((err = pbuf_copy(r, p)) != ERR_OK) {
GordonSin 0:0ed2a7c7190c 633 pbuf_free(r);
GordonSin 0:0ed2a7c7190c 634 LINK_STATS_INC(link.memerr);
GordonSin 0:0ed2a7c7190c 635 LINK_STATS_INC(link.drop);
GordonSin 0:0ed2a7c7190c 636 snmp_inc_ifoutdiscards(stats_if);
GordonSin 0:0ed2a7c7190c 637 return err;
GordonSin 0:0ed2a7c7190c 638 }
GordonSin 0:0ed2a7c7190c 639
GordonSin 0:0ed2a7c7190c 640 /* Put the packet on a linked list which gets emptied through calling
GordonSin 0:0ed2a7c7190c 641 netif_poll(). */
GordonSin 0:0ed2a7c7190c 642
GordonSin 0:0ed2a7c7190c 643 /* let last point to the last pbuf in chain r */
GordonSin 0:0ed2a7c7190c 644 for (last = r; last->next != NULL; last = last->next);
GordonSin 0:0ed2a7c7190c 645
GordonSin 0:0ed2a7c7190c 646 SYS_ARCH_PROTECT(lev);
GordonSin 0:0ed2a7c7190c 647 if(netif->loop_first != NULL) {
GordonSin 0:0ed2a7c7190c 648 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
GordonSin 0:0ed2a7c7190c 649 netif->loop_last->next = r;
GordonSin 0:0ed2a7c7190c 650 netif->loop_last = last;
GordonSin 0:0ed2a7c7190c 651 } else {
GordonSin 0:0ed2a7c7190c 652 netif->loop_first = r;
GordonSin 0:0ed2a7c7190c 653 netif->loop_last = last;
GordonSin 0:0ed2a7c7190c 654 }
GordonSin 0:0ed2a7c7190c 655 SYS_ARCH_UNPROTECT(lev);
GordonSin 0:0ed2a7c7190c 656
GordonSin 0:0ed2a7c7190c 657 LINK_STATS_INC(link.xmit);
GordonSin 0:0ed2a7c7190c 658 snmp_add_ifoutoctets(stats_if, p->tot_len);
GordonSin 0:0ed2a7c7190c 659 snmp_inc_ifoutucastpkts(stats_if);
GordonSin 0:0ed2a7c7190c 660
GordonSin 0:0ed2a7c7190c 661 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
GordonSin 0:0ed2a7c7190c 662 /* For multithreading environment, schedule a call to netif_poll */
GordonSin 0:0ed2a7c7190c 663 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
GordonSin 0:0ed2a7c7190c 664 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
GordonSin 0:0ed2a7c7190c 665
GordonSin 0:0ed2a7c7190c 666 return ERR_OK;
GordonSin 0:0ed2a7c7190c 667 }
GordonSin 0:0ed2a7c7190c 668
GordonSin 0:0ed2a7c7190c 669 /**
GordonSin 0:0ed2a7c7190c 670 * Call netif_poll() in the main loop of your application. This is to prevent
GordonSin 0:0ed2a7c7190c 671 * reentering non-reentrant functions like tcp_input(). Packets passed to
GordonSin 0:0ed2a7c7190c 672 * netif_loop_output() are put on a list that is passed to netif->input() by
GordonSin 0:0ed2a7c7190c 673 * netif_poll().
GordonSin 0:0ed2a7c7190c 674 */
GordonSin 0:0ed2a7c7190c 675 void
GordonSin 0:0ed2a7c7190c 676 netif_poll(struct netif *netif)
GordonSin 0:0ed2a7c7190c 677 {
GordonSin 0:0ed2a7c7190c 678 struct pbuf *in;
GordonSin 0:0ed2a7c7190c 679 /* If we have a loopif, SNMP counters are adjusted for it,
GordonSin 0:0ed2a7c7190c 680 * if not they are adjusted for 'netif'. */
GordonSin 0:0ed2a7c7190c 681 #if LWIP_SNMP
GordonSin 0:0ed2a7c7190c 682 #if LWIP_HAVE_LOOPIF
GordonSin 0:0ed2a7c7190c 683 struct netif *stats_if = &loop_netif;
GordonSin 0:0ed2a7c7190c 684 #else /* LWIP_HAVE_LOOPIF */
GordonSin 0:0ed2a7c7190c 685 struct netif *stats_if = netif;
GordonSin 0:0ed2a7c7190c 686 #endif /* LWIP_HAVE_LOOPIF */
GordonSin 0:0ed2a7c7190c 687 #endif /* LWIP_SNMP */
GordonSin 0:0ed2a7c7190c 688 SYS_ARCH_DECL_PROTECT(lev);
GordonSin 0:0ed2a7c7190c 689
GordonSin 0:0ed2a7c7190c 690 do {
GordonSin 0:0ed2a7c7190c 691 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
GordonSin 0:0ed2a7c7190c 692 SYS_ARCH_PROTECT(lev);
GordonSin 0:0ed2a7c7190c 693 in = netif->loop_first;
GordonSin 0:0ed2a7c7190c 694 if (in != NULL) {
GordonSin 0:0ed2a7c7190c 695 struct pbuf *in_end = in;
GordonSin 0:0ed2a7c7190c 696 #if LWIP_LOOPBACK_MAX_PBUFS
GordonSin 0:0ed2a7c7190c 697 u8_t clen = pbuf_clen(in);
GordonSin 0:0ed2a7c7190c 698 /* adjust the number of pbufs on queue */
GordonSin 0:0ed2a7c7190c 699 LWIP_ASSERT("netif->loop_cnt_current underflow",
GordonSin 0:0ed2a7c7190c 700 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
GordonSin 0:0ed2a7c7190c 701 netif->loop_cnt_current -= clen;
GordonSin 0:0ed2a7c7190c 702 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
GordonSin 0:0ed2a7c7190c 703 while (in_end->len != in_end->tot_len) {
GordonSin 0:0ed2a7c7190c 704 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
GordonSin 0:0ed2a7c7190c 705 in_end = in_end->next;
GordonSin 0:0ed2a7c7190c 706 }
GordonSin 0:0ed2a7c7190c 707 /* 'in_end' now points to the last pbuf from 'in' */
GordonSin 0:0ed2a7c7190c 708 if (in_end == netif->loop_last) {
GordonSin 0:0ed2a7c7190c 709 /* this was the last pbuf in the list */
GordonSin 0:0ed2a7c7190c 710 netif->loop_first = netif->loop_last = NULL;
GordonSin 0:0ed2a7c7190c 711 } else {
GordonSin 0:0ed2a7c7190c 712 /* pop the pbuf off the list */
GordonSin 0:0ed2a7c7190c 713 netif->loop_first = in_end->next;
GordonSin 0:0ed2a7c7190c 714 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
GordonSin 0:0ed2a7c7190c 715 }
GordonSin 0:0ed2a7c7190c 716 /* De-queue the pbuf from its successors on the 'loop_' list. */
GordonSin 0:0ed2a7c7190c 717 in_end->next = NULL;
GordonSin 0:0ed2a7c7190c 718 }
GordonSin 0:0ed2a7c7190c 719 SYS_ARCH_UNPROTECT(lev);
GordonSin 0:0ed2a7c7190c 720
GordonSin 0:0ed2a7c7190c 721 if (in != NULL) {
GordonSin 0:0ed2a7c7190c 722 LINK_STATS_INC(link.recv);
GordonSin 0:0ed2a7c7190c 723 snmp_add_ifinoctets(stats_if, in->tot_len);
GordonSin 0:0ed2a7c7190c 724 snmp_inc_ifinucastpkts(stats_if);
GordonSin 0:0ed2a7c7190c 725 /* loopback packets are always IP packets! */
GordonSin 0:0ed2a7c7190c 726 if (ip_input(in, netif) != ERR_OK) {
GordonSin 0:0ed2a7c7190c 727 pbuf_free(in);
GordonSin 0:0ed2a7c7190c 728 }
GordonSin 0:0ed2a7c7190c 729 /* Don't reference the packet any more! */
GordonSin 0:0ed2a7c7190c 730 in = NULL;
GordonSin 0:0ed2a7c7190c 731 }
GordonSin 0:0ed2a7c7190c 732 /* go on while there is a packet on the list */
GordonSin 0:0ed2a7c7190c 733 } while (netif->loop_first != NULL);
GordonSin 0:0ed2a7c7190c 734 }
GordonSin 0:0ed2a7c7190c 735
GordonSin 0:0ed2a7c7190c 736 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
GordonSin 0:0ed2a7c7190c 737 /**
GordonSin 0:0ed2a7c7190c 738 * Calls netif_poll() for every netif on the netif_list.
GordonSin 0:0ed2a7c7190c 739 */
GordonSin 0:0ed2a7c7190c 740 void
GordonSin 0:0ed2a7c7190c 741 netif_poll_all(void)
GordonSin 0:0ed2a7c7190c 742 {
GordonSin 0:0ed2a7c7190c 743 struct netif *netif = netif_list;
GordonSin 0:0ed2a7c7190c 744 /* loop through netifs */
GordonSin 0:0ed2a7c7190c 745 while (netif != NULL) {
GordonSin 0:0ed2a7c7190c 746 netif_poll(netif);
GordonSin 0:0ed2a7c7190c 747 /* proceed to next network interface */
GordonSin 0:0ed2a7c7190c 748 netif = netif->next;
GordonSin 0:0ed2a7c7190c 749 }
GordonSin 0:0ed2a7c7190c 750 }
GordonSin 0:0ed2a7c7190c 751 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
GordonSin 0:0ed2a7c7190c 752 #endif /* ENABLE_LOOPBACK */