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:
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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
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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"
47 struct netif *netif_list = NULL;
48 struct netif *netif_default = NULL;
51 * Add a network interface to the list of lwIP netifs.
53 * @param ipaddr IP address for the new netif
54 * @param netmask network mask for the new netif
55 * @param gw default gateway IP address for the new netif
56 * @param state opaque data passed to the new netif
57 * @param init callback function that initializes the interface
58 * @param input callback function that...
60 * @return netif, or NULL if failed.
63 netif_add(struct ip_addr *ipaddr, struct ip_addr *netmask,
66 err_t (* init)(struct netif *netif),
67 err_t (* input)(struct pbuf *p, struct netif *netif))
70 static int netifnum = 0;
72 /* allocate netif structure */
73 netif = mem_malloc(sizeof(struct netif));
76 DEBUGF(NETIF_DEBUG, ("netif_add(): out of memory for netif\n"));
80 /* netif not under DHCP control by default */
83 /* remember netif specific state information data */
85 netif->num = netifnum++;
88 netif_set_addr(netif, ipaddr, netmask, gw);
90 /* call user specified initialization function for netif */
91 if (init(netif) != ERR_OK) {
96 /* add this netif to the list */
97 netif->next = netif_list;
100 DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
101 netif->name[0], netif->name[1]));
102 ip_addr_debug_print(ipaddr);
103 DEBUGF(NETIF_DEBUG, (" netmask "));
104 ip_addr_debug_print(netmask);
105 DEBUGF(NETIF_DEBUG, (" gw "));
106 ip_addr_debug_print(gw);
107 DEBUGF(NETIF_DEBUG, ("\n"));
108 #endif /* NETIF_DEBUG */
113 netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask,
116 netif_set_ipaddr(netif, ipaddr);
117 netif_set_netmask(netif, netmask);
118 netif_set_gw(netif, gw);
121 /*-----------------------------------------------------------------------------------*/
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;
132 /* look for netif further down the list */
133 struct netif * tmpNetif;
134 for(tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
135 if(tmpNetif->next == netif) {
136 tmpNetif->next = netif->next;
141 return; /* we didn't find any netif today */
143 /* this netif is default? */
144 if (netif_default == netif)
145 /* reset default netif */
146 netif_default = NULL;
148 DEBUGF(NETIF_DEBUG, ("netif_remove: removed netif\n"));
152 /*-----------------------------------------------------------------------------------*/
154 netif_find(char *name)
165 for(netif = netif_list; netif != NULL; netif = netif->next) {
166 if(num == netif->num &&
167 name[0] == netif->name[0] &&
168 name[1] == netif->name[1]) {
169 DEBUGF(NETIF_DEBUG, ("netif_find: found %s\n", name));
173 DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %s\n", name));
176 /*-----------------------------------------------------------------------------------*/
178 netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
180 DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE, ("netif: setting IP address of interface %c%c%u to %u.%u.%u.%u\n",
181 netif->name[0], netif->name[1], netif->num,
182 (u8_t)(ntohl(ipaddr->addr) >> 24 & 0xff),
183 (u8_t)(ntohl(ipaddr->addr) >> 16 & 0xff),
184 (u8_t)(ntohl(ipaddr->addr) >> 8 & 0xff),
185 (u8_t)(ntohl(ipaddr->addr) & 0xff)));
186 ip_addr_set(&(netif->ip_addr), ipaddr);
188 /*-----------------------------------------------------------------------------------*/
190 netif_set_gw(struct netif *netif, struct ip_addr *gw)
192 DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE, ("netif: setting GW address of interface %c%c%u to %u.%u.%u.%u\n",
193 netif->name[0], netif->name[1], netif->num,
194 (u8_t)(ntohl(gw->addr) >> 24 & 0xff),
195 (u8_t)(ntohl(gw->addr) >> 16 & 0xff),
196 (u8_t)(ntohl(gw->addr) >> 8 & 0xff),
197 (u8_t)(ntohl(gw->addr) & 0xff)));
198 ip_addr_set(&(netif->gw), gw);
200 /*-----------------------------------------------------------------------------------*/
202 netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
204 DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE, ("netif: setting netmask of interface %c%c%u to %u.%u.%u.%u\n",
205 netif->name[0], netif->name[1], netif->num,
206 (u8_t)(ntohl(netmask->addr) >> 24 & 0xff),
207 (u8_t)(ntohl(netmask->addr) >> 16 & 0xff),
208 (u8_t)(ntohl(netmask->addr) >> 8 & 0xff),
209 (u8_t)(ntohl(netmask->addr) & 0xff)));
210 ip_addr_set(&(netif->netmask), netmask);
212 /*-----------------------------------------------------------------------------------*/
214 netif_set_default(struct netif *netif)
216 netif_default = netif;
217 DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
218 netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
220 /*-----------------------------------------------------------------------------------*/
224 netif_list = netif_default = NULL;
226 /*-----------------------------------------------------------------------------------*/