Adam Green / EthernetInterface

Deprecated fork of old network stack source from github. Please use official library instead: https://mbed.org/users/mbed_official/code/EthernetInterface/

lwip/core/netif.c@1:eadc868c2acf, 2013-10-26 (annotated)

Committer:
AdamGreen
Date:
Sat Oct 26 08:51:36 2013 +0000
Revision:
1:eadc868c2acf
Parent:
0:3b00827bb0b7 
Fix TCP checksum bug and stranded large TCP segments.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:3b00827bb0b7 1 /**
AdamGreen 0:3b00827bb0b7 2 * @file
AdamGreen 0:3b00827bb0b7 3 * lwIP network interface abstraction
AdamGreen 0:3b00827bb0b7 4 *
AdamGreen 0:3b00827bb0b7 5 */
AdamGreen 0:3b00827bb0b7 6
AdamGreen 0:3b00827bb0b7 7 /*
AdamGreen 0:3b00827bb0b7 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
AdamGreen 0:3b00827bb0b7 9 * All rights reserved.
AdamGreen 0:3b00827bb0b7 10 *
AdamGreen 0:3b00827bb0b7 11 * Redistribution and use in source and binary forms, with or without modification,
AdamGreen 0:3b00827bb0b7 12 * are permitted provided that the following conditions are met:
AdamGreen 0:3b00827bb0b7 13 *
AdamGreen 0:3b00827bb0b7 14 * 1. Redistributions of source code must retain the above copyright notice,
AdamGreen 0:3b00827bb0b7 15 * this list of conditions and the following disclaimer.
AdamGreen 0:3b00827bb0b7 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
AdamGreen 0:3b00827bb0b7 17 * this list of conditions and the following disclaimer in the documentation
AdamGreen 0:3b00827bb0b7 18 * and/or other materials provided with the distribution.
AdamGreen 0:3b00827bb0b7 19 * 3. The name of the author may not be used to endorse or promote products
AdamGreen 0:3b00827bb0b7 20 * derived from this software without specific prior written permission.
AdamGreen 0:3b00827bb0b7 21 *
AdamGreen 0:3b00827bb0b7 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
AdamGreen 0:3b00827bb0b7 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
AdamGreen 0:3b00827bb0b7 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
AdamGreen 0:3b00827bb0b7 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
AdamGreen 0:3b00827bb0b7 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
AdamGreen 0:3b00827bb0b7 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
AdamGreen 0:3b00827bb0b7 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
AdamGreen 0:3b00827bb0b7 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
AdamGreen 0:3b00827bb0b7 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
AdamGreen 0:3b00827bb0b7 31 * OF SUCH DAMAGE.
AdamGreen 0:3b00827bb0b7 32 *
AdamGreen 0:3b00827bb0b7 33 * This file is part of the lwIP TCP/IP stack.
AdamGreen 0:3b00827bb0b7 34 *
AdamGreen 0:3b00827bb0b7 35 * Author: Adam Dunkels <adam@sics.se>
AdamGreen 0:3b00827bb0b7 36 *
AdamGreen 0:3b00827bb0b7 37 */
AdamGreen 0:3b00827bb0b7 38
AdamGreen 0:3b00827bb0b7 39 #include "lwip/opt.h"
AdamGreen 0:3b00827bb0b7 40
AdamGreen 0:3b00827bb0b7 41 #include "lwip/def.h"
AdamGreen 0:3b00827bb0b7 42 #include "lwip/ip_addr.h"
AdamGreen 0:3b00827bb0b7 43 #include "lwip/netif.h"
AdamGreen 0:3b00827bb0b7 44 #include "lwip/tcp_impl.h"
AdamGreen 0:3b00827bb0b7 45 #include "lwip/snmp.h"
AdamGreen 0:3b00827bb0b7 46 #include "lwip/igmp.h"
AdamGreen 0:3b00827bb0b7 47 #include "netif/etharp.h"
AdamGreen 0:3b00827bb0b7 48 #include "lwip/stats.h"
AdamGreen 0:3b00827bb0b7 49 #if ENABLE_LOOPBACK
AdamGreen 0:3b00827bb0b7 50 #include "lwip/sys.h"
AdamGreen 0:3b00827bb0b7 51 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
AdamGreen 0:3b00827bb0b7 52 #include "lwip/tcpip.h"
AdamGreen 0:3b00827bb0b7 53 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
AdamGreen 0:3b00827bb0b7 54 #endif /* ENABLE_LOOPBACK */
AdamGreen 0:3b00827bb0b7 55
AdamGreen 0:3b00827bb0b7 56 #if LWIP_AUTOIP
AdamGreen 0:3b00827bb0b7 57 #include "lwip/autoip.h"
AdamGreen 0:3b00827bb0b7 58 #endif /* LWIP_AUTOIP */
AdamGreen 0:3b00827bb0b7 59 #if LWIP_DHCP
AdamGreen 0:3b00827bb0b7 60 #include "lwip/dhcp.h"
AdamGreen 0:3b00827bb0b7 61 #endif /* LWIP_DHCP */
AdamGreen 0:3b00827bb0b7 62
AdamGreen 0:3b00827bb0b7 63 #if LWIP_NETIF_STATUS_CALLBACK
AdamGreen 0:3b00827bb0b7 64 #define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
AdamGreen 0:3b00827bb0b7 65 #else
AdamGreen 0:3b00827bb0b7 66 #define NETIF_STATUS_CALLBACK(n)
AdamGreen 0:3b00827bb0b7 67 #endif /* LWIP_NETIF_STATUS_CALLBACK */
AdamGreen 0:3b00827bb0b7 68
AdamGreen 0:3b00827bb0b7 69 #if LWIP_NETIF_LINK_CALLBACK
AdamGreen 0:3b00827bb0b7 70 #define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
AdamGreen 0:3b00827bb0b7 71 #else
AdamGreen 0:3b00827bb0b7 72 #define NETIF_LINK_CALLBACK(n)
AdamGreen 0:3b00827bb0b7 73 #endif /* LWIP_NETIF_LINK_CALLBACK */
AdamGreen 0:3b00827bb0b7 74
AdamGreen 0:3b00827bb0b7 75 struct netif *netif_list;
AdamGreen 0:3b00827bb0b7 76 struct netif *netif_default;
AdamGreen 0:3b00827bb0b7 77
AdamGreen 0:3b00827bb0b7 78 #if LWIP_HAVE_LOOPIF
AdamGreen 0:3b00827bb0b7 79 static struct netif loop_netif;
AdamGreen 0:3b00827bb0b7 80
AdamGreen 0:3b00827bb0b7 81 /**
AdamGreen 0:3b00827bb0b7 82 * Initialize a lwip network interface structure for a loopback interface
AdamGreen 0:3b00827bb0b7 83 *
AdamGreen 0:3b00827bb0b7 84 * @param netif the lwip network interface structure for this loopif
AdamGreen 0:3b00827bb0b7 85 * @return ERR_OK if the loopif is initialized
AdamGreen 0:3b00827bb0b7 86 * ERR_MEM if private data couldn't be allocated
AdamGreen 0:3b00827bb0b7 87 */
AdamGreen 0:3b00827bb0b7 88 static err_t
AdamGreen 0:3b00827bb0b7 89 netif_loopif_init(struct netif *netif)
AdamGreen 0:3b00827bb0b7 90 {
AdamGreen 0:3b00827bb0b7 91 /* initialize the snmp variables and counters inside the struct netif
AdamGreen 0:3b00827bb0b7 92 * ifSpeed: no assumption can be made!
AdamGreen 0:3b00827bb0b7 93 */
AdamGreen 0:3b00827bb0b7 94 NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
AdamGreen 0:3b00827bb0b7 95
AdamGreen 0:3b00827bb0b7 96 netif->name[0] = 'l';
AdamGreen 0:3b00827bb0b7 97 netif->name[1] = 'o';
AdamGreen 0:3b00827bb0b7 98 netif->output = netif_loop_output;
AdamGreen 0:3b00827bb0b7 99 return ERR_OK;
AdamGreen 0:3b00827bb0b7 100 }
AdamGreen 0:3b00827bb0b7 101 #endif /* LWIP_HAVE_LOOPIF */
AdamGreen 0:3b00827bb0b7 102
AdamGreen 0:3b00827bb0b7 103 void
AdamGreen 0:3b00827bb0b7 104 netif_init(void)
AdamGreen 0:3b00827bb0b7 105 {
AdamGreen 0:3b00827bb0b7 106 #if LWIP_HAVE_LOOPIF
AdamGreen 0:3b00827bb0b7 107 ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
AdamGreen 0:3b00827bb0b7 108 IP4_ADDR(&loop_gw, 127,0,0,1);
AdamGreen 0:3b00827bb0b7 109 IP4_ADDR(&loop_ipaddr, 127,0,0,1);
AdamGreen 0:3b00827bb0b7 110 IP4_ADDR(&loop_netmask, 255,0,0,0);
AdamGreen 0:3b00827bb0b7 111
AdamGreen 0:3b00827bb0b7 112 #if NO_SYS
AdamGreen 0:3b00827bb0b7 113 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
AdamGreen 0:3b00827bb0b7 114 #else /* NO_SYS */
AdamGreen 0:3b00827bb0b7 115 netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
AdamGreen 0:3b00827bb0b7 116 #endif /* NO_SYS */
AdamGreen 0:3b00827bb0b7 117 netif_set_up(&loop_netif);
AdamGreen 0:3b00827bb0b7 118
AdamGreen 0:3b00827bb0b7 119 #endif /* LWIP_HAVE_LOOPIF */
AdamGreen 0:3b00827bb0b7 120 }
AdamGreen 0:3b00827bb0b7 121
AdamGreen 0:3b00827bb0b7 122 /**
AdamGreen 0:3b00827bb0b7 123 * Add a network interface to the list of lwIP netifs.
AdamGreen 0:3b00827bb0b7 124 *
AdamGreen 0:3b00827bb0b7 125 * @param netif a pre-allocated netif structure
AdamGreen 0:3b00827bb0b7 126 * @param ipaddr IP address for the new netif
AdamGreen 0:3b00827bb0b7 127 * @param netmask network mask for the new netif
AdamGreen 0:3b00827bb0b7 128 * @param gw default gateway IP address for the new netif
AdamGreen 0:3b00827bb0b7 129 * @param state opaque data passed to the new netif
AdamGreen 0:3b00827bb0b7 130 * @param init callback function that initializes the interface
AdamGreen 0:3b00827bb0b7 131 * @param input callback function that is called to pass
AdamGreen 0:3b00827bb0b7 132 * ingress packets up in the protocol layer stack.
AdamGreen 0:3b00827bb0b7 133 *
AdamGreen 0:3b00827bb0b7 134 * @return netif, or NULL if failed.
AdamGreen 0:3b00827bb0b7 135 */
AdamGreen 0:3b00827bb0b7 136 struct netif *
AdamGreen 0:3b00827bb0b7 137 netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
AdamGreen 0:3b00827bb0b7 138 ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
AdamGreen 0:3b00827bb0b7 139 {
AdamGreen 0:3b00827bb0b7 140 static u8_t netifnum = 0;
AdamGreen 0:3b00827bb0b7 141
AdamGreen 0:3b00827bb0b7 142 LWIP_ASSERT("No init function given", init != NULL);
AdamGreen 0:3b00827bb0b7 143
AdamGreen 0:3b00827bb0b7 144 /* reset new interface configuration state */
AdamGreen 0:3b00827bb0b7 145 ip_addr_set_zero(&netif->ip_addr);
AdamGreen 0:3b00827bb0b7 146 ip_addr_set_zero(&netif->netmask);
AdamGreen 0:3b00827bb0b7 147 ip_addr_set_zero(&netif->gw);
AdamGreen 0:3b00827bb0b7 148 netif->flags = 0;
AdamGreen 0:3b00827bb0b7 149 #if LWIP_DHCP
AdamGreen 0:3b00827bb0b7 150 /* netif not under DHCP control by default */
AdamGreen 0:3b00827bb0b7 151 netif->dhcp = NULL;
AdamGreen 0:3b00827bb0b7 152 #endif /* LWIP_DHCP */
AdamGreen 0:3b00827bb0b7 153 #if LWIP_AUTOIP
AdamGreen 0:3b00827bb0b7 154 /* netif not under AutoIP control by default */
AdamGreen 0:3b00827bb0b7 155 netif->autoip = NULL;
AdamGreen 0:3b00827bb0b7 156 #endif /* LWIP_AUTOIP */
AdamGreen 0:3b00827bb0b7 157 #if LWIP_NETIF_STATUS_CALLBACK
AdamGreen 0:3b00827bb0b7 158 netif->status_callback = NULL;
AdamGreen 0:3b00827bb0b7 159 #endif /* LWIP_NETIF_STATUS_CALLBACK */
AdamGreen 0:3b00827bb0b7 160 #if LWIP_NETIF_LINK_CALLBACK
AdamGreen 0:3b00827bb0b7 161 netif->link_callback = NULL;
AdamGreen 0:3b00827bb0b7 162 #endif /* LWIP_NETIF_LINK_CALLBACK */
AdamGreen 0:3b00827bb0b7 163 #if LWIP_IGMP
AdamGreen 0:3b00827bb0b7 164 netif->igmp_mac_filter = NULL;
AdamGreen 0:3b00827bb0b7 165 #endif /* LWIP_IGMP */
AdamGreen 0:3b00827bb0b7 166 #if ENABLE_LOOPBACK
AdamGreen 0:3b00827bb0b7 167 netif->loop_first = NULL;
AdamGreen 0:3b00827bb0b7 168 netif->loop_last = NULL;
AdamGreen 0:3b00827bb0b7 169 #endif /* ENABLE_LOOPBACK */
AdamGreen 0:3b00827bb0b7 170
AdamGreen 0:3b00827bb0b7 171 /* remember netif specific state information data */
AdamGreen 0:3b00827bb0b7 172 netif->state = state;
AdamGreen 0:3b00827bb0b7 173 netif->num = netifnum++;
AdamGreen 0:3b00827bb0b7 174 netif->input = input;
AdamGreen 0:3b00827bb0b7 175 #if LWIP_NETIF_HWADDRHINT
AdamGreen 0:3b00827bb0b7 176 netif->addr_hint = NULL;
AdamGreen 0:3b00827bb0b7 177 #endif /* LWIP_NETIF_HWADDRHINT*/
AdamGreen 0:3b00827bb0b7 178 #if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
AdamGreen 0:3b00827bb0b7 179 netif->loop_cnt_current = 0;
AdamGreen 0:3b00827bb0b7 180 #endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
AdamGreen 0:3b00827bb0b7 181
AdamGreen 0:3b00827bb0b7 182 netif_set_addr(netif, ipaddr, netmask, gw);
AdamGreen 0:3b00827bb0b7 183
AdamGreen 0:3b00827bb0b7 184 /* call user specified initialization function for netif */
AdamGreen 0:3b00827bb0b7 185 if (init(netif) != ERR_OK) {
AdamGreen 0:3b00827bb0b7 186 return NULL;
AdamGreen 0:3b00827bb0b7 187 }
AdamGreen 0:3b00827bb0b7 188
AdamGreen 0:3b00827bb0b7 189 /* add this netif to the list */
AdamGreen 0:3b00827bb0b7 190 netif->next = netif_list;
AdamGreen 0:3b00827bb0b7 191 netif_list = netif;
AdamGreen 0:3b00827bb0b7 192 snmp_inc_iflist();
AdamGreen 0:3b00827bb0b7 193
AdamGreen 0:3b00827bb0b7 194 #if LWIP_IGMP
AdamGreen 0:3b00827bb0b7 195 /* start IGMP processing */
AdamGreen 0:3b00827bb0b7 196 if (netif->flags & NETIF_FLAG_IGMP) {
AdamGreen 0:3b00827bb0b7 197 igmp_start(netif);
AdamGreen 0:3b00827bb0b7 198 }
AdamGreen 0:3b00827bb0b7 199 #endif /* LWIP_IGMP */
AdamGreen 0:3b00827bb0b7 200
AdamGreen 0:3b00827bb0b7 201 LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
AdamGreen 0:3b00827bb0b7 202 netif->name[0], netif->name[1]));
AdamGreen 0:3b00827bb0b7 203 ip_addr_debug_print(NETIF_DEBUG, ipaddr);
AdamGreen 0:3b00827bb0b7 204 LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
AdamGreen 0:3b00827bb0b7 205 ip_addr_debug_print(NETIF_DEBUG, netmask);
AdamGreen 0:3b00827bb0b7 206 LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
AdamGreen 0:3b00827bb0b7 207 ip_addr_debug_print(NETIF_DEBUG, gw);
AdamGreen 0:3b00827bb0b7 208 LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
AdamGreen 0:3b00827bb0b7 209 return netif;
AdamGreen 0:3b00827bb0b7 210 }
AdamGreen 0:3b00827bb0b7 211
AdamGreen 0:3b00827bb0b7 212 /**
AdamGreen 0:3b00827bb0b7 213 * Change IP address configuration for a network interface (including netmask
AdamGreen 0:3b00827bb0b7 214 * and default gateway).
AdamGreen 0:3b00827bb0b7 215 *
AdamGreen 0:3b00827bb0b7 216 * @param netif the network interface to change
AdamGreen 0:3b00827bb0b7 217 * @param ipaddr the new IP address
AdamGreen 0:3b00827bb0b7 218 * @param netmask the new netmask
AdamGreen 0:3b00827bb0b7 219 * @param gw the new default gateway
AdamGreen 0:3b00827bb0b7 220 */
AdamGreen 0:3b00827bb0b7 221 void
AdamGreen 0:3b00827bb0b7 222 netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
AdamGreen 0:3b00827bb0b7 223 ip_addr_t *gw)
AdamGreen 0:3b00827bb0b7 224 {
AdamGreen 0:3b00827bb0b7 225 netif_set_ipaddr(netif, ipaddr);
AdamGreen 0:3b00827bb0b7 226 netif_set_netmask(netif, netmask);
AdamGreen 0:3b00827bb0b7 227 netif_set_gw(netif, gw);
AdamGreen 0:3b00827bb0b7 228 }
AdamGreen 0:3b00827bb0b7 229
AdamGreen 0:3b00827bb0b7 230 /**
AdamGreen 0:3b00827bb0b7 231 * Remove a network interface from the list of lwIP netifs.
AdamGreen 0:3b00827bb0b7 232 *
AdamGreen 0:3b00827bb0b7 233 * @param netif the network interface to remove
AdamGreen 0:3b00827bb0b7 234 */
AdamGreen 0:3b00827bb0b7 235 void
AdamGreen 0:3b00827bb0b7 236 netif_remove(struct netif *netif)
AdamGreen 0:3b00827bb0b7 237 {
AdamGreen 0:3b00827bb0b7 238 if (netif == NULL) {
AdamGreen 0:3b00827bb0b7 239 return;
AdamGreen 0:3b00827bb0b7 240 }
AdamGreen 0:3b00827bb0b7 241
AdamGreen 0:3b00827bb0b7 242 #if LWIP_IGMP
AdamGreen 0:3b00827bb0b7 243 /* stop IGMP processing */
AdamGreen 0:3b00827bb0b7 244 if (netif->flags & NETIF_FLAG_IGMP) {
AdamGreen 0:3b00827bb0b7 245 igmp_stop(netif);
AdamGreen 0:3b00827bb0b7 246 }
AdamGreen 0:3b00827bb0b7 247 #endif /* LWIP_IGMP */
AdamGreen 0:3b00827bb0b7 248 if (netif_is_up(netif)) {
AdamGreen 0:3b00827bb0b7 249 /* set netif down before removing (call callback function) */
AdamGreen 0:3b00827bb0b7 250 netif_set_down(netif);
AdamGreen 0:3b00827bb0b7 251 }
AdamGreen 0:3b00827bb0b7 252
AdamGreen 0:3b00827bb0b7 253 snmp_delete_ipaddridx_tree(netif);
AdamGreen 0:3b00827bb0b7 254
AdamGreen 0:3b00827bb0b7 255 /* is it the first netif? */
AdamGreen 0:3b00827bb0b7 256 if (netif_list == netif) {
AdamGreen 0:3b00827bb0b7 257 netif_list = netif->next;
AdamGreen 0:3b00827bb0b7 258 } else {
AdamGreen 0:3b00827bb0b7 259 /* look for netif further down the list */
AdamGreen 0:3b00827bb0b7 260 struct netif * tmpNetif;
AdamGreen 0:3b00827bb0b7 261 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
AdamGreen 0:3b00827bb0b7 262 if (tmpNetif->next == netif) {
AdamGreen 0:3b00827bb0b7 263 tmpNetif->next = netif->next;
AdamGreen 0:3b00827bb0b7 264 break;
AdamGreen 0:3b00827bb0b7 265 }
AdamGreen 0:3b00827bb0b7 266 }
AdamGreen 0:3b00827bb0b7 267 if (tmpNetif == NULL)
AdamGreen 0:3b00827bb0b7 268 return; /* we didn't find any netif today */
AdamGreen 0:3b00827bb0b7 269 }
AdamGreen 0:3b00827bb0b7 270 snmp_dec_iflist();
AdamGreen 0:3b00827bb0b7 271 /* this netif is default? */
AdamGreen 0:3b00827bb0b7 272 if (netif_default == netif) {
AdamGreen 0:3b00827bb0b7 273 /* reset default netif */
AdamGreen 0:3b00827bb0b7 274 netif_set_default(NULL);
AdamGreen 0:3b00827bb0b7 275 }
AdamGreen 0:3b00827bb0b7 276 LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
AdamGreen 0:3b00827bb0b7 277 }
AdamGreen 0:3b00827bb0b7 278
AdamGreen 0:3b00827bb0b7 279 /**
AdamGreen 0:3b00827bb0b7 280 * Find a network interface by searching for its name
AdamGreen 0:3b00827bb0b7 281 *
AdamGreen 0:3b00827bb0b7 282 * @param name the name of the netif (like netif->name) plus concatenated number
AdamGreen 0:3b00827bb0b7 283 * in ascii representation (e.g. 'en0')
AdamGreen 0:3b00827bb0b7 284 */
AdamGreen 0:3b00827bb0b7 285 struct netif *
AdamGreen 0:3b00827bb0b7 286 netif_find(char *name)
AdamGreen 0:3b00827bb0b7 287 {
AdamGreen 0:3b00827bb0b7 288 struct netif *netif;
AdamGreen 0:3b00827bb0b7 289 u8_t num;
AdamGreen 0:3b00827bb0b7 290
AdamGreen 0:3b00827bb0b7 291 if (name == NULL) {
AdamGreen 0:3b00827bb0b7 292 return NULL;
AdamGreen 0:3b00827bb0b7 293 }
AdamGreen 0:3b00827bb0b7 294
AdamGreen 0:3b00827bb0b7 295 num = name[2] - '0';
AdamGreen 0:3b00827bb0b7 296
AdamGreen 0:3b00827bb0b7 297 for(netif = netif_list; netif != NULL; netif = netif->next) {
AdamGreen 0:3b00827bb0b7 298 if (num == netif->num &&
AdamGreen 0:3b00827bb0b7 299 name[0] == netif->name[0] &&
AdamGreen 0:3b00827bb0b7 300 name[1] == netif->name[1]) {
AdamGreen 0:3b00827bb0b7 301 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
AdamGreen 0:3b00827bb0b7 302 return netif;
AdamGreen 0:3b00827bb0b7 303 }
AdamGreen 0:3b00827bb0b7 304 }
AdamGreen 0:3b00827bb0b7 305 LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
AdamGreen 0:3b00827bb0b7 306 return NULL;
AdamGreen 0:3b00827bb0b7 307 }
AdamGreen 0:3b00827bb0b7 308
AdamGreen 0:3b00827bb0b7 309 /**
AdamGreen 0:3b00827bb0b7 310 * Change the IP address of a network interface
AdamGreen 0:3b00827bb0b7 311 *
AdamGreen 0:3b00827bb0b7 312 * @param netif the network interface to change
AdamGreen 0:3b00827bb0b7 313 * @param ipaddr the new IP address
AdamGreen 0:3b00827bb0b7 314 *
AdamGreen 0:3b00827bb0b7 315 * @note call netif_set_addr() if you also want to change netmask and
AdamGreen 0:3b00827bb0b7 316 * default gateway
AdamGreen 0:3b00827bb0b7 317 */
AdamGreen 0:3b00827bb0b7 318 void
AdamGreen 0:3b00827bb0b7 319 netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
AdamGreen 0:3b00827bb0b7 320 {
AdamGreen 0:3b00827bb0b7 321 /* Protect against dereferencing NULL pointers by
AdamGreen 0:3b00827bb0b7 322 treating like ANY, as does ip_addr_set() */
AdamGreen 0:3b00827bb0b7 323 if (!ipaddr) {
AdamGreen 0:3b00827bb0b7 324 ipaddr = IP_ADDR_ANY;
AdamGreen 0:3b00827bb0b7 325 }
AdamGreen 0:3b00827bb0b7 326
AdamGreen 0:3b00827bb0b7 327 /* TODO: Handling of obsolete pcbs */
AdamGreen 0:3b00827bb0b7 328 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
AdamGreen 0:3b00827bb0b7 329 #if LWIP_TCP
AdamGreen 0:3b00827bb0b7 330 struct tcp_pcb *pcb;
AdamGreen 0:3b00827bb0b7 331 struct tcp_pcb_listen *lpcb;
AdamGreen 0:3b00827bb0b7 332
AdamGreen 0:3b00827bb0b7 333 /* address is actually being changed? */
AdamGreen 0:3b00827bb0b7 334 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
AdamGreen 0:3b00827bb0b7 335 /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
AdamGreen 0:3b00827bb0b7 336 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
AdamGreen 0:3b00827bb0b7 337 pcb = tcp_active_pcbs;
AdamGreen 0:3b00827bb0b7 338 while (pcb != NULL) {
AdamGreen 0:3b00827bb0b7 339 /* PCB bound to current local interface address? */
AdamGreen 0:3b00827bb0b7 340 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
AdamGreen 0:3b00827bb0b7 341 #if LWIP_AUTOIP
AdamGreen 0:3b00827bb0b7 342 /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
AdamGreen 0:3b00827bb0b7 343 && !ip_addr_islinklocal(&(pcb->local_ip))
AdamGreen 0:3b00827bb0b7 344 #endif /* LWIP_AUTOIP */
AdamGreen 0:3b00827bb0b7 345 ) {
AdamGreen 0:3b00827bb0b7 346 /* this connection must be aborted */
AdamGreen 0:3b00827bb0b7 347 struct tcp_pcb *next = pcb->next;
AdamGreen 0:3b00827bb0b7 348 LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
AdamGreen 0:3b00827bb0b7 349 tcp_abort(pcb);
AdamGreen 0:3b00827bb0b7 350 pcb = next;
AdamGreen 0:3b00827bb0b7 351 } else {
AdamGreen 0:3b00827bb0b7 352 pcb = pcb->next;
AdamGreen 0:3b00827bb0b7 353 }
AdamGreen 0:3b00827bb0b7 354 }
AdamGreen 0:3b00827bb0b7 355 for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
AdamGreen 0:3b00827bb0b7 356 /* PCB bound to current local interface address? */
AdamGreen 0:3b00827bb0b7 357 if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
AdamGreen 0:3b00827bb0b7 358 (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
AdamGreen 0:3b00827bb0b7 359 /* The PCB is listening to the old ipaddr and
AdamGreen 0:3b00827bb0b7 360 * is set to listen to the new one instead */
AdamGreen 0:3b00827bb0b7 361 ip_addr_set(&(lpcb->local_ip), ipaddr);
AdamGreen 0:3b00827bb0b7 362 }
AdamGreen 0:3b00827bb0b7 363 }
AdamGreen 0:3b00827bb0b7 364 }
AdamGreen 0:3b00827bb0b7 365 #endif
AdamGreen 0:3b00827bb0b7 366 snmp_delete_ipaddridx_tree(netif);
AdamGreen 0:3b00827bb0b7 367 snmp_delete_iprteidx_tree(0,netif);
AdamGreen 0:3b00827bb0b7 368 /* set new IP address to netif */
AdamGreen 0:3b00827bb0b7 369 ip_addr_set(&(netif->ip_addr), ipaddr);
AdamGreen 0:3b00827bb0b7 370 snmp_insert_ipaddridx_tree(netif);
AdamGreen 0:3b00827bb0b7 371 snmp_insert_iprteidx_tree(0,netif);
AdamGreen 0:3b00827bb0b7 372
AdamGreen 0:3b00827bb0b7 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",
AdamGreen 0:3b00827bb0b7 374 netif->name[0], netif->name[1],
AdamGreen 0:3b00827bb0b7 375 ip4_addr1_16(&netif->ip_addr),
AdamGreen 0:3b00827bb0b7 376 ip4_addr2_16(&netif->ip_addr),
AdamGreen 0:3b00827bb0b7 377 ip4_addr3_16(&netif->ip_addr),
AdamGreen 0:3b00827bb0b7 378 ip4_addr4_16(&netif->ip_addr)));
AdamGreen 0:3b00827bb0b7 379 }
AdamGreen 0:3b00827bb0b7 380
AdamGreen 0:3b00827bb0b7 381 /**
AdamGreen 0:3b00827bb0b7 382 * Change the default gateway for a network interface
AdamGreen 0:3b00827bb0b7 383 *
AdamGreen 0:3b00827bb0b7 384 * @param netif the network interface to change
AdamGreen 0:3b00827bb0b7 385 * @param gw the new default gateway
AdamGreen 0:3b00827bb0b7 386 *
AdamGreen 0:3b00827bb0b7 387 * @note call netif_set_addr() if you also want to change ip address and netmask
AdamGreen 0:3b00827bb0b7 388 */
AdamGreen 0:3b00827bb0b7 389 void
AdamGreen 0:3b00827bb0b7 390 netif_set_gw(struct netif *netif, ip_addr_t *gw)
AdamGreen 0:3b00827bb0b7 391 {
AdamGreen 0:3b00827bb0b7 392 ip_addr_set(&(netif->gw), gw);
AdamGreen 0:3b00827bb0b7 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",
AdamGreen 0:3b00827bb0b7 394 netif->name[0], netif->name[1],
AdamGreen 0:3b00827bb0b7 395 ip4_addr1_16(&netif->gw),
AdamGreen 0:3b00827bb0b7 396 ip4_addr2_16(&netif->gw),
AdamGreen 0:3b00827bb0b7 397 ip4_addr3_16(&netif->gw),
AdamGreen 0:3b00827bb0b7 398 ip4_addr4_16(&netif->gw)));
AdamGreen 0:3b00827bb0b7 399 }
AdamGreen 0:3b00827bb0b7 400
AdamGreen 0:3b00827bb0b7 401 /**
AdamGreen 0:3b00827bb0b7 402 * Change the netmask of a network interface
AdamGreen 0:3b00827bb0b7 403 *
AdamGreen 0:3b00827bb0b7 404 * @param netif the network interface to change
AdamGreen 0:3b00827bb0b7 405 * @param netmask the new netmask
AdamGreen 0:3b00827bb0b7 406 *
AdamGreen 0:3b00827bb0b7 407 * @note call netif_set_addr() if you also want to change ip address and
AdamGreen 0:3b00827bb0b7 408 * default gateway
AdamGreen 0:3b00827bb0b7 409 */
AdamGreen 0:3b00827bb0b7 410 void
AdamGreen 0:3b00827bb0b7 411 netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
AdamGreen 0:3b00827bb0b7 412 {
AdamGreen 0:3b00827bb0b7 413 snmp_delete_iprteidx_tree(0, netif);
AdamGreen 0:3b00827bb0b7 414 /* set new netmask to netif */
AdamGreen 0:3b00827bb0b7 415 ip_addr_set(&(netif->netmask), netmask);
AdamGreen 0:3b00827bb0b7 416 snmp_insert_iprteidx_tree(0, netif);
AdamGreen 0:3b00827bb0b7 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",
AdamGreen 0:3b00827bb0b7 418 netif->name[0], netif->name[1],
AdamGreen 0:3b00827bb0b7 419 ip4_addr1_16(&netif->netmask),
AdamGreen 0:3b00827bb0b7 420 ip4_addr2_16(&netif->netmask),
AdamGreen 0:3b00827bb0b7 421 ip4_addr3_16(&netif->netmask),
AdamGreen 0:3b00827bb0b7 422 ip4_addr4_16(&netif->netmask)));
AdamGreen 0:3b00827bb0b7 423 }
AdamGreen 0:3b00827bb0b7 424
AdamGreen 0:3b00827bb0b7 425 /**
AdamGreen 0:3b00827bb0b7 426 * Set a network interface as the default network interface
AdamGreen 0:3b00827bb0b7 427 * (used to output all packets for which no specific route is found)
AdamGreen 0:3b00827bb0b7 428 *
AdamGreen 0:3b00827bb0b7 429 * @param netif the default network interface
AdamGreen 0:3b00827bb0b7 430 */
AdamGreen 0:3b00827bb0b7 431 void
AdamGreen 0:3b00827bb0b7 432 netif_set_default(struct netif *netif)
AdamGreen 0:3b00827bb0b7 433 {
AdamGreen 0:3b00827bb0b7 434 if (netif == NULL) {
AdamGreen 0:3b00827bb0b7 435 /* remove default route */
AdamGreen 0:3b00827bb0b7 436 snmp_delete_iprteidx_tree(1, netif);
AdamGreen 0:3b00827bb0b7 437 } else {
AdamGreen 0:3b00827bb0b7 438 /* install default route */
AdamGreen 0:3b00827bb0b7 439 snmp_insert_iprteidx_tree(1, netif);
AdamGreen 0:3b00827bb0b7 440 }
AdamGreen 0:3b00827bb0b7 441 netif_default = netif;
AdamGreen 0:3b00827bb0b7 442 LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
AdamGreen 0:3b00827bb0b7 443 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
AdamGreen 0:3b00827bb0b7 444 }
AdamGreen 0:3b00827bb0b7 445
AdamGreen 0:3b00827bb0b7 446 /**
AdamGreen 0:3b00827bb0b7 447 * Bring an interface up, available for processing
AdamGreen 0:3b00827bb0b7 448 * traffic.
AdamGreen 0:3b00827bb0b7 449 *
AdamGreen 0:3b00827bb0b7 450 * @note: Enabling DHCP on a down interface will make it come
AdamGreen 0:3b00827bb0b7 451 * up once configured.
AdamGreen 0:3b00827bb0b7 452 *
AdamGreen 0:3b00827bb0b7 453 * @see dhcp_start()
AdamGreen 0:3b00827bb0b7 454 */
AdamGreen 0:3b00827bb0b7 455 void netif_set_up(struct netif *netif)
AdamGreen 0:3b00827bb0b7 456 {
AdamGreen 0:3b00827bb0b7 457 if (!(netif->flags & NETIF_FLAG_UP)) {
AdamGreen 0:3b00827bb0b7 458 netif->flags |= NETIF_FLAG_UP;
AdamGreen 0:3b00827bb0b7 459
AdamGreen 0:3b00827bb0b7 460 #if LWIP_SNMP
AdamGreen 0:3b00827bb0b7 461 snmp_get_sysuptime(&netif->ts);
AdamGreen 0:3b00827bb0b7 462 #endif /* LWIP_SNMP */
AdamGreen 0:3b00827bb0b7 463
AdamGreen 0:3b00827bb0b7 464 NETIF_STATUS_CALLBACK(netif);
AdamGreen 0:3b00827bb0b7 465
AdamGreen 0:3b00827bb0b7 466 if (netif->flags & NETIF_FLAG_LINK_UP) {
AdamGreen 0:3b00827bb0b7 467 #if LWIP_ARP
AdamGreen 0:3b00827bb0b7 468 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
AdamGreen 0:3b00827bb0b7 469 if (netif->flags & (NETIF_FLAG_ETHARP)) {
AdamGreen 0:3b00827bb0b7 470 etharp_gratuitous(netif);
AdamGreen 0:3b00827bb0b7 471 }
AdamGreen 0:3b00827bb0b7 472 #endif /* LWIP_ARP */
AdamGreen 0:3b00827bb0b7 473
AdamGreen 0:3b00827bb0b7 474 #if LWIP_IGMP
AdamGreen 0:3b00827bb0b7 475 /* resend IGMP memberships */
AdamGreen 0:3b00827bb0b7 476 if (netif->flags & NETIF_FLAG_IGMP) {
AdamGreen 0:3b00827bb0b7 477 igmp_report_groups( netif);
AdamGreen 0:3b00827bb0b7 478 }
AdamGreen 0:3b00827bb0b7 479 #endif /* LWIP_IGMP */
AdamGreen 0:3b00827bb0b7 480 }
AdamGreen 0:3b00827bb0b7 481 }
AdamGreen 0:3b00827bb0b7 482 }
AdamGreen 0:3b00827bb0b7 483
AdamGreen 0:3b00827bb0b7 484 /**
AdamGreen 0:3b00827bb0b7 485 * Bring an interface down, disabling any traffic processing.
AdamGreen 0:3b00827bb0b7 486 *
AdamGreen 0:3b00827bb0b7 487 * @note: Enabling DHCP on a down interface will make it come
AdamGreen 0:3b00827bb0b7 488 * up once configured.
AdamGreen 0:3b00827bb0b7 489 *
AdamGreen 0:3b00827bb0b7 490 * @see dhcp_start()
AdamGreen 0:3b00827bb0b7 491 */
AdamGreen 0:3b00827bb0b7 492 void netif_set_down(struct netif *netif)
AdamGreen 0:3b00827bb0b7 493 {
AdamGreen 0:3b00827bb0b7 494 if (netif->flags & NETIF_FLAG_UP) {
AdamGreen 0:3b00827bb0b7 495 netif->flags &= ~NETIF_FLAG_UP;
AdamGreen 0:3b00827bb0b7 496 #if LWIP_SNMP
AdamGreen 0:3b00827bb0b7 497 snmp_get_sysuptime(&netif->ts);
AdamGreen 0:3b00827bb0b7 498 #endif
AdamGreen 0:3b00827bb0b7 499
AdamGreen 0:3b00827bb0b7 500 NETIF_STATUS_CALLBACK(netif);
AdamGreen 0:3b00827bb0b7 501 }
AdamGreen 0:3b00827bb0b7 502 }
AdamGreen 0:3b00827bb0b7 503
AdamGreen 0:3b00827bb0b7 504 #if LWIP_NETIF_STATUS_CALLBACK
AdamGreen 0:3b00827bb0b7 505 /**
AdamGreen 0:3b00827bb0b7 506 * Set callback to be called when interface is brought up/down
AdamGreen 0:3b00827bb0b7 507 */
AdamGreen 0:3b00827bb0b7 508 void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
AdamGreen 0:3b00827bb0b7 509 {
AdamGreen 0:3b00827bb0b7 510 if (netif) {
AdamGreen 0:3b00827bb0b7 511 netif->status_callback = status_callback;
AdamGreen 0:3b00827bb0b7 512 }
AdamGreen 0:3b00827bb0b7 513 }
AdamGreen 0:3b00827bb0b7 514 #endif /* LWIP_NETIF_STATUS_CALLBACK */
AdamGreen 0:3b00827bb0b7 515
AdamGreen 0:3b00827bb0b7 516 /**
AdamGreen 0:3b00827bb0b7 517 * Called by a driver when its link goes up
AdamGreen 0:3b00827bb0b7 518 */
AdamGreen 0:3b00827bb0b7 519 void netif_set_link_up(struct netif *netif )
AdamGreen 0:3b00827bb0b7 520 {
AdamGreen 0:3b00827bb0b7 521 if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
AdamGreen 0:3b00827bb0b7 522 netif->flags |= NETIF_FLAG_LINK_UP;
AdamGreen 0:3b00827bb0b7 523
AdamGreen 0:3b00827bb0b7 524 #if LWIP_DHCP
AdamGreen 0:3b00827bb0b7 525 if (netif->dhcp) {
AdamGreen 0:3b00827bb0b7 526 dhcp_network_changed(netif);
AdamGreen 0:3b00827bb0b7 527 }
AdamGreen 0:3b00827bb0b7 528 #endif /* LWIP_DHCP */
AdamGreen 0:3b00827bb0b7 529
AdamGreen 0:3b00827bb0b7 530 #if LWIP_AUTOIP
AdamGreen 0:3b00827bb0b7 531 if (netif->autoip) {
AdamGreen 0:3b00827bb0b7 532 autoip_network_changed(netif);
AdamGreen 0:3b00827bb0b7 533 }
AdamGreen 0:3b00827bb0b7 534 #endif /* LWIP_AUTOIP */
AdamGreen 0:3b00827bb0b7 535
AdamGreen 0:3b00827bb0b7 536 if (netif->flags & NETIF_FLAG_UP) {
AdamGreen 0:3b00827bb0b7 537 #if LWIP_ARP
AdamGreen 0:3b00827bb0b7 538 /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
AdamGreen 0:3b00827bb0b7 539 if (netif->flags & NETIF_FLAG_ETHARP) {
AdamGreen 0:3b00827bb0b7 540 etharp_gratuitous(netif);
AdamGreen 0:3b00827bb0b7 541 }
AdamGreen 0:3b00827bb0b7 542 #endif /* LWIP_ARP */
AdamGreen 0:3b00827bb0b7 543
AdamGreen 0:3b00827bb0b7 544 #if LWIP_IGMP
AdamGreen 0:3b00827bb0b7 545 /* resend IGMP memberships */
AdamGreen 0:3b00827bb0b7 546 if (netif->flags & NETIF_FLAG_IGMP) {
AdamGreen 0:3b00827bb0b7 547 igmp_report_groups( netif);
AdamGreen 0:3b00827bb0b7 548 }
AdamGreen 0:3b00827bb0b7 549 #endif /* LWIP_IGMP */
AdamGreen 0:3b00827bb0b7 550 }
AdamGreen 0:3b00827bb0b7 551 NETIF_LINK_CALLBACK(netif);
AdamGreen 0:3b00827bb0b7 552 }
AdamGreen 0:3b00827bb0b7 553 }
AdamGreen 0:3b00827bb0b7 554
AdamGreen 0:3b00827bb0b7 555 /**
AdamGreen 0:3b00827bb0b7 556 * Called by a driver when its link goes down
AdamGreen 0:3b00827bb0b7 557 */
AdamGreen 0:3b00827bb0b7 558 void netif_set_link_down(struct netif *netif )
AdamGreen 0:3b00827bb0b7 559 {
AdamGreen 0:3b00827bb0b7 560 if (netif->flags & NETIF_FLAG_LINK_UP) {
AdamGreen 0:3b00827bb0b7 561 netif->flags &= ~NETIF_FLAG_LINK_UP;
AdamGreen 0:3b00827bb0b7 562 NETIF_LINK_CALLBACK(netif);
AdamGreen 0:3b00827bb0b7 563 }
AdamGreen 0:3b00827bb0b7 564 }
AdamGreen 0:3b00827bb0b7 565
AdamGreen 0:3b00827bb0b7 566 #if LWIP_NETIF_LINK_CALLBACK
AdamGreen 0:3b00827bb0b7 567 /**
AdamGreen 0:3b00827bb0b7 568 * Set callback to be called when link is brought up/down
AdamGreen 0:3b00827bb0b7 569 */
AdamGreen 0:3b00827bb0b7 570 void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
AdamGreen 0:3b00827bb0b7 571 {
AdamGreen 0:3b00827bb0b7 572 if (netif) {
AdamGreen 0:3b00827bb0b7 573 netif->link_callback = link_callback;
AdamGreen 0:3b00827bb0b7 574 }
AdamGreen 0:3b00827bb0b7 575 }
AdamGreen 0:3b00827bb0b7 576 #endif /* LWIP_NETIF_LINK_CALLBACK */
AdamGreen 0:3b00827bb0b7 577
AdamGreen 0:3b00827bb0b7 578 #if ENABLE_LOOPBACK
AdamGreen 0:3b00827bb0b7 579 /**
AdamGreen 0:3b00827bb0b7 580 * Send an IP packet to be received on the same netif (loopif-like).
AdamGreen 0:3b00827bb0b7 581 * The pbuf is simply copied and handed back to netif->input.
AdamGreen 0:3b00827bb0b7 582 * In multithreaded mode, this is done directly since netif->input must put
AdamGreen 0:3b00827bb0b7 583 * the packet on a queue.
AdamGreen 0:3b00827bb0b7 584 * In callback mode, the packet is put on an internal queue and is fed to
AdamGreen 0:3b00827bb0b7 585 * netif->input by netif_poll().
AdamGreen 0:3b00827bb0b7 586 *
AdamGreen 0:3b00827bb0b7 587 * @param netif the lwip network interface structure
AdamGreen 0:3b00827bb0b7 588 * @param p the (IP) packet to 'send'
AdamGreen 0:3b00827bb0b7 589 * @param ipaddr the ip address to send the packet to (not used)
AdamGreen 0:3b00827bb0b7 590 * @return ERR_OK if the packet has been sent
AdamGreen 0:3b00827bb0b7 591 * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
AdamGreen 0:3b00827bb0b7 592 */
AdamGreen 0:3b00827bb0b7 593 err_t
AdamGreen 0:3b00827bb0b7 594 netif_loop_output(struct netif *netif, struct pbuf *p,
AdamGreen 0:3b00827bb0b7 595 ip_addr_t *ipaddr)
AdamGreen 0:3b00827bb0b7 596 {
AdamGreen 0:3b00827bb0b7 597 struct pbuf *r;
AdamGreen 0:3b00827bb0b7 598 err_t err;
AdamGreen 0:3b00827bb0b7 599 struct pbuf *last;
AdamGreen 0:3b00827bb0b7 600 #if LWIP_LOOPBACK_MAX_PBUFS
AdamGreen 0:3b00827bb0b7 601 u8_t clen = 0;
AdamGreen 0:3b00827bb0b7 602 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
AdamGreen 0:3b00827bb0b7 603 /* If we have a loopif, SNMP counters are adjusted for it,
AdamGreen 0:3b00827bb0b7 604 * if not they are adjusted for 'netif'. */
AdamGreen 0:3b00827bb0b7 605 #if LWIP_SNMP
AdamGreen 0:3b00827bb0b7 606 #if LWIP_HAVE_LOOPIF
AdamGreen 0:3b00827bb0b7 607 struct netif *stats_if = &loop_netif;
AdamGreen 0:3b00827bb0b7 608 #else /* LWIP_HAVE_LOOPIF */
AdamGreen 0:3b00827bb0b7 609 struct netif *stats_if = netif;
AdamGreen 0:3b00827bb0b7 610 #endif /* LWIP_HAVE_LOOPIF */
AdamGreen 0:3b00827bb0b7 611 #endif /* LWIP_SNMP */
AdamGreen 0:3b00827bb0b7 612 SYS_ARCH_DECL_PROTECT(lev);
AdamGreen 0:3b00827bb0b7 613 LWIP_UNUSED_ARG(ipaddr);
AdamGreen 0:3b00827bb0b7 614
AdamGreen 0:3b00827bb0b7 615 /* Allocate a new pbuf */
AdamGreen 0:3b00827bb0b7 616 r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
AdamGreen 0:3b00827bb0b7 617 if (r == NULL) {
AdamGreen 0:3b00827bb0b7 618 LINK_STATS_INC(link.memerr);
AdamGreen 0:3b00827bb0b7 619 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 620 snmp_inc_ifoutdiscards(stats_if);
AdamGreen 0:3b00827bb0b7 621 return ERR_MEM;
AdamGreen 0:3b00827bb0b7 622 }
AdamGreen 0:3b00827bb0b7 623 #if LWIP_LOOPBACK_MAX_PBUFS
AdamGreen 0:3b00827bb0b7 624 clen = pbuf_clen(r);
AdamGreen 0:3b00827bb0b7 625 /* check for overflow or too many pbuf on queue */
AdamGreen 0:3b00827bb0b7 626 if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
AdamGreen 0:3b00827bb0b7 627 ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
AdamGreen 0:3b00827bb0b7 628 pbuf_free(r);
AdamGreen 0:3b00827bb0b7 629 LINK_STATS_INC(link.memerr);
AdamGreen 0:3b00827bb0b7 630 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 631 snmp_inc_ifoutdiscards(stats_if);
AdamGreen 0:3b00827bb0b7 632 return ERR_MEM;
AdamGreen 0:3b00827bb0b7 633 }
AdamGreen 0:3b00827bb0b7 634 netif->loop_cnt_current += clen;
AdamGreen 0:3b00827bb0b7 635 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
AdamGreen 0:3b00827bb0b7 636
AdamGreen 0:3b00827bb0b7 637 /* Copy the whole pbuf queue p into the single pbuf r */
AdamGreen 0:3b00827bb0b7 638 if ((err = pbuf_copy(r, p)) != ERR_OK) {
AdamGreen 0:3b00827bb0b7 639 pbuf_free(r);
AdamGreen 0:3b00827bb0b7 640 LINK_STATS_INC(link.memerr);
AdamGreen 0:3b00827bb0b7 641 LINK_STATS_INC(link.drop);
AdamGreen 0:3b00827bb0b7 642 snmp_inc_ifoutdiscards(stats_if);
AdamGreen 0:3b00827bb0b7 643 return err;
AdamGreen 0:3b00827bb0b7 644 }
AdamGreen 0:3b00827bb0b7 645
AdamGreen 0:3b00827bb0b7 646 /* Put the packet on a linked list which gets emptied through calling
AdamGreen 0:3b00827bb0b7 647 netif_poll(). */
AdamGreen 0:3b00827bb0b7 648
AdamGreen 0:3b00827bb0b7 649 /* let last point to the last pbuf in chain r */
AdamGreen 0:3b00827bb0b7 650 for (last = r; last->next != NULL; last = last->next);
AdamGreen 0:3b00827bb0b7 651
AdamGreen 0:3b00827bb0b7 652 SYS_ARCH_PROTECT(lev);
AdamGreen 0:3b00827bb0b7 653 if(netif->loop_first != NULL) {
AdamGreen 0:3b00827bb0b7 654 LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
AdamGreen 0:3b00827bb0b7 655 netif->loop_last->next = r;
AdamGreen 0:3b00827bb0b7 656 netif->loop_last = last;
AdamGreen 0:3b00827bb0b7 657 } else {
AdamGreen 0:3b00827bb0b7 658 netif->loop_first = r;
AdamGreen 0:3b00827bb0b7 659 netif->loop_last = last;
AdamGreen 0:3b00827bb0b7 660 }
AdamGreen 0:3b00827bb0b7 661 SYS_ARCH_UNPROTECT(lev);
AdamGreen 0:3b00827bb0b7 662
AdamGreen 0:3b00827bb0b7 663 LINK_STATS_INC(link.xmit);
AdamGreen 0:3b00827bb0b7 664 snmp_add_ifoutoctets(stats_if, p->tot_len);
AdamGreen 0:3b00827bb0b7 665 snmp_inc_ifoutucastpkts(stats_if);
AdamGreen 0:3b00827bb0b7 666
AdamGreen 0:3b00827bb0b7 667 #if LWIP_NETIF_LOOPBACK_MULTITHREADING
AdamGreen 0:3b00827bb0b7 668 /* For multithreading environment, schedule a call to netif_poll */
AdamGreen 0:3b00827bb0b7 669 tcpip_callback((tcpip_callback_fn)netif_poll, netif);
AdamGreen 0:3b00827bb0b7 670 #endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
AdamGreen 0:3b00827bb0b7 671
AdamGreen 0:3b00827bb0b7 672 return ERR_OK;
AdamGreen 0:3b00827bb0b7 673 }
AdamGreen 0:3b00827bb0b7 674
AdamGreen 0:3b00827bb0b7 675 /**
AdamGreen 0:3b00827bb0b7 676 * Call netif_poll() in the main loop of your application. This is to prevent
AdamGreen 0:3b00827bb0b7 677 * reentering non-reentrant functions like tcp_input(). Packets passed to
AdamGreen 0:3b00827bb0b7 678 * netif_loop_output() are put on a list that is passed to netif->input() by
AdamGreen 0:3b00827bb0b7 679 * netif_poll().
AdamGreen 0:3b00827bb0b7 680 */
AdamGreen 0:3b00827bb0b7 681 void
AdamGreen 0:3b00827bb0b7 682 netif_poll(struct netif *netif)
AdamGreen 0:3b00827bb0b7 683 {
AdamGreen 0:3b00827bb0b7 684 struct pbuf *in;
AdamGreen 0:3b00827bb0b7 685 /* If we have a loopif, SNMP counters are adjusted for it,
AdamGreen 0:3b00827bb0b7 686 * if not they are adjusted for 'netif'. */
AdamGreen 0:3b00827bb0b7 687 #if LWIP_SNMP
AdamGreen 0:3b00827bb0b7 688 #if LWIP_HAVE_LOOPIF
AdamGreen 0:3b00827bb0b7 689 struct netif *stats_if = &loop_netif;
AdamGreen 0:3b00827bb0b7 690 #else /* LWIP_HAVE_LOOPIF */
AdamGreen 0:3b00827bb0b7 691 struct netif *stats_if = netif;
AdamGreen 0:3b00827bb0b7 692 #endif /* LWIP_HAVE_LOOPIF */
AdamGreen 0:3b00827bb0b7 693 #endif /* LWIP_SNMP */
AdamGreen 0:3b00827bb0b7 694 SYS_ARCH_DECL_PROTECT(lev);
AdamGreen 0:3b00827bb0b7 695
AdamGreen 0:3b00827bb0b7 696 do {
AdamGreen 0:3b00827bb0b7 697 /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
AdamGreen 0:3b00827bb0b7 698 SYS_ARCH_PROTECT(lev);
AdamGreen 0:3b00827bb0b7 699 in = netif->loop_first;
AdamGreen 0:3b00827bb0b7 700 if (in != NULL) {
AdamGreen 0:3b00827bb0b7 701 struct pbuf *in_end = in;
AdamGreen 0:3b00827bb0b7 702 #if LWIP_LOOPBACK_MAX_PBUFS
AdamGreen 0:3b00827bb0b7 703 u8_t clen = pbuf_clen(in);
AdamGreen 0:3b00827bb0b7 704 /* adjust the number of pbufs on queue */
AdamGreen 0:3b00827bb0b7 705 LWIP_ASSERT("netif->loop_cnt_current underflow",
AdamGreen 0:3b00827bb0b7 706 ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
AdamGreen 0:3b00827bb0b7 707 netif->loop_cnt_current -= clen;
AdamGreen 0:3b00827bb0b7 708 #endif /* LWIP_LOOPBACK_MAX_PBUFS */
AdamGreen 0:3b00827bb0b7 709 while (in_end->len != in_end->tot_len) {
AdamGreen 0:3b00827bb0b7 710 LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
AdamGreen 0:3b00827bb0b7 711 in_end = in_end->next;
AdamGreen 0:3b00827bb0b7 712 }
AdamGreen 0:3b00827bb0b7 713 /* 'in_end' now points to the last pbuf from 'in' */
AdamGreen 0:3b00827bb0b7 714 if (in_end == netif->loop_last) {
AdamGreen 0:3b00827bb0b7 715 /* this was the last pbuf in the list */
AdamGreen 0:3b00827bb0b7 716 netif->loop_first = netif->loop_last = NULL;
AdamGreen 0:3b00827bb0b7 717 } else {
AdamGreen 0:3b00827bb0b7 718 /* pop the pbuf off the list */
AdamGreen 0:3b00827bb0b7 719 netif->loop_first = in_end->next;
AdamGreen 0:3b00827bb0b7 720 LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
AdamGreen 0:3b00827bb0b7 721 }
AdamGreen 0:3b00827bb0b7 722 /* De-queue the pbuf from its successors on the 'loop_' list. */
AdamGreen 0:3b00827bb0b7 723 in_end->next = NULL;
AdamGreen 0:3b00827bb0b7 724 }
AdamGreen 0:3b00827bb0b7 725 SYS_ARCH_UNPROTECT(lev);
AdamGreen 0:3b00827bb0b7 726
AdamGreen 0:3b00827bb0b7 727 if (in != NULL) {
AdamGreen 0:3b00827bb0b7 728 LINK_STATS_INC(link.recv);
AdamGreen 0:3b00827bb0b7 729 snmp_add_ifinoctets(stats_if, in->tot_len);
AdamGreen 0:3b00827bb0b7 730 snmp_inc_ifinucastpkts(stats_if);
AdamGreen 0:3b00827bb0b7 731 /* loopback packets are always IP packets! */
AdamGreen 0:3b00827bb0b7 732 if (ip_input(in, netif) != ERR_OK) {
AdamGreen 0:3b00827bb0b7 733 pbuf_free(in);
AdamGreen 0:3b00827bb0b7 734 }
AdamGreen 0:3b00827bb0b7 735 /* Don't reference the packet any more! */
AdamGreen 0:3b00827bb0b7 736 in = NULL;
AdamGreen 0:3b00827bb0b7 737 }
AdamGreen 0:3b00827bb0b7 738 /* go on while there is a packet on the list */
AdamGreen 0:3b00827bb0b7 739 } while (netif->loop_first != NULL);
AdamGreen 0:3b00827bb0b7 740 }
AdamGreen 0:3b00827bb0b7 741
AdamGreen 0:3b00827bb0b7 742 #if !LWIP_NETIF_LOOPBACK_MULTITHREADING
AdamGreen 0:3b00827bb0b7 743 /**
AdamGreen 0:3b00827bb0b7 744 * Calls netif_poll() for every netif on the netif_list.
AdamGreen 0:3b00827bb0b7 745 */
AdamGreen 0:3b00827bb0b7 746 void
AdamGreen 0:3b00827bb0b7 747 netif_poll_all(void)
AdamGreen 0:3b00827bb0b7 748 {
AdamGreen 0:3b00827bb0b7 749 struct netif *netif = netif_list;
AdamGreen 0:3b00827bb0b7 750 /* loop through netifs */
AdamGreen 0:3b00827bb0b7 751 while (netif != NULL) {
AdamGreen 0:3b00827bb0b7 752 netif_poll(netif);
AdamGreen 0:3b00827bb0b7 753 /* proceed to next network interface */
AdamGreen 0:3b00827bb0b7 754 netif = netif->next;
AdamGreen 0:3b00827bb0b7 755 }
AdamGreen 0:3b00827bb0b7 756 }
AdamGreen 0:3b00827bb0b7 757 #endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
AdamGreen 0:3b00827bb0b7 758 #endif /* ENABLE_LOOPBACK */