4 * lwIP network interface abstraction
8 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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12 * are permitted provided that the following conditions are met:
14 * 1. Redistributions of source code must retain the above copyright notice,
15 * this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright notice,
17 * this list of conditions and the following disclaimer in the documentation
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22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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33 * This file is part of the lwIP TCP/IP stack.
35 * Author: Adam Dunkels <adam@sics.se>
43 #include "lwip/netif.h"
44 #include "lwip/ip_addr.h"
48 struct netif *netif_list = NULL;
49 struct netif *netif_default = NULL;
52 * Add a network interface to the list of lwIP netifs.
54 * @param ipaddr IP address for the new netif
55 * @param netmask network mask for the new netif
56 * @param gw default gateway IP address for the new netif
57 * @param state opaque data passed to the new netif
58 * @param init callback function that initializes the interface
59 * @param input callback function that...
61 * @return netif, or NULL if failed.
64 netif_add(struct ip_addr *ipaddr, struct ip_addr *netmask,
67 err_t (* init)(struct netif *netif),
68 err_t (* input)(struct pbuf *p, struct netif *netif))
71 static int netifnum = 0;
73 /* allocate netif structure */
74 netif = mem_malloc(sizeof(struct netif));
77 DEBUGF(NETIF_DEBUG, ("netif_add(): out of memory for netif\n"));
81 /* netif not under DHCP control by default */
84 /* remember netif specific state information data */
86 netif->num = netifnum++;
89 netif_set_addr(netif, ipaddr, netmask, gw);
91 /* call user specified initialization function for netif */
92 if (init(netif) != ERR_OK) {
97 /* add this netif to the list */
98 netif->next = netif_list;
101 DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
102 netif->name[0], netif->name[1]));
103 ip_addr_debug_print(ipaddr);
104 DEBUGF(NETIF_DEBUG, (" netmask "));
105 ip_addr_debug_print(netmask);
106 DEBUGF(NETIF_DEBUG, (" gw "));
107 ip_addr_debug_print(gw);
108 DEBUGF(NETIF_DEBUG, ("\n"));
109 #endif /* NETIF_DEBUG */
114 netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask,
117 netif_set_ipaddr(netif, ipaddr);
118 netif_set_netmask(netif, netmask);
119 netif_set_gw(netif, gw);
122 void netif_remove(struct netif * netif)
124 if ( netif == NULL ) return;
126 /* is it the first netif? */
127 if (netif_list == netif) {
128 netif_list = netif->next;
131 /* look for netif further down the list */
132 struct netif * tmpNetif;
133 for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
134 if (tmpNetif->next == netif) {
135 tmpNetif->next = netif->next;
139 if (tmpNetif == NULL)
140 return; /* we didn't find any netif today */
142 /* this netif is default? */
143 if (netif_default == netif)
144 /* reset default netif */
145 netif_default = NULL;
146 DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
151 netif_find(char *name)
162 for(netif = netif_list; netif != NULL; netif = netif->next) {
163 if (num == netif->num &&
164 name[0] == netif->name[0] &&
165 name[1] == netif->name[1]) {
166 DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
170 DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
173 /*-----------------------------------------------------------------------------------*/
175 netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
177 /* TODO: Handling of obsolete pcbs */
178 /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
181 struct tcp_pcb_listen *lpcb;
183 /* address has changed? */
184 if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0)
186 extern struct tcp_pcb *tcp_active_pcbs;
187 DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: netif address changed\n"));
188 pcb = tcp_active_pcbs;
189 while (pcb != NULL) {
190 if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) {
191 /* The PCB is connected using the old ipaddr and must be aborted */
192 struct tcp_pcb *next = pcb->next;
193 DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: aborting pcb %p\n", (void *)pcb));
200 for (lpcb = tcp_listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
201 if (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr))) {
202 /* The PCB is listening to the old ipaddr and
203 * is set to listen to the new one instead */
204 ip_addr_set(&(lpcb->local_ip), ipaddr);
209 ip_addr_set(&(netif->ip_addr), ipaddr);
210 DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: IP address of interface %c%c set to %u.%u.%u.%u\n",
211 netif->name[0], netif->name[1],
212 (u8_t)(ntohl(netif->ip_addr.addr) >> 24 & 0xff),
213 (u8_t)(ntohl(netif->ip_addr.addr) >> 16 & 0xff),
214 (u8_t)(ntohl(netif->ip_addr.addr) >> 8 & 0xff),
215 (u8_t)(ntohl(netif->ip_addr.addr) & 0xff)));
217 /*-----------------------------------------------------------------------------------*/
219 netif_set_gw(struct netif *netif, struct ip_addr *gw)
221 ip_addr_set(&(netif->gw), gw);
222 DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: GW address of interface %c%c set to %u.%u.%u.%u\n",
223 netif->name[0], netif->name[1],
224 (u8_t)(ntohl(netif->gw.addr) >> 24 & 0xff),
225 (u8_t)(ntohl(netif->gw.addr) >> 16 & 0xff),
226 (u8_t)(ntohl(netif->gw.addr) >> 8 & 0xff),
227 (u8_t)(ntohl(netif->gw.addr) & 0xff)));
229 /*-----------------------------------------------------------------------------------*/
231 netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
233 ip_addr_set(&(netif->netmask), netmask);
234 DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: netmask of interface %c%c set to %u.%u.%u.%u\n",
235 netif->name[0], netif->name[1],
236 (u8_t)(ntohl(netif->netmask.addr) >> 24 & 0xff),
237 (u8_t)(ntohl(netif->netmask.addr) >> 16 & 0xff),
238 (u8_t)(ntohl(netif->netmask.addr) >> 8 & 0xff),
239 (u8_t)(ntohl(netif->netmask.addr) & 0xff)));
241 /*-----------------------------------------------------------------------------------*/
243 netif_set_default(struct netif *netif)
245 netif_default = netif;
246 DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
247 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
249 /*-----------------------------------------------------------------------------------*/
253 netif_list = netif_default = NULL;
255 /*-----------------------------------------------------------------------------------*/