| /** |
| * @file |
| * |
| * lwIP network interface abstraction |
| */ |
| |
| /* |
| * Copyright (c) 2001-2003 Swedish Institute of Computer Science. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| * OF SUCH DAMAGE. |
| * |
| * This file is part of the lwIP TCP/IP stack. |
| * |
| * Author: Adam Dunkels <adam@sics.se> |
| * |
| */ |
| |
| #include "lwip/opt.h" |
| |
| #include "lwip/def.h" |
| #include "lwip/netif.h" |
| #include "lwip/ip_addr.h" |
| #include "lwip/tcp.h" |
| |
| |
| struct netif *netif_list = NULL; |
| struct netif *netif_default = NULL; |
| |
| /** |
| * Add a network interface to the list of lwIP netifs. |
| * |
| * @param ipaddr IP address for the new netif |
| * @param netmask network mask for the new netif |
| * @param gw default gateway IP address for the new netif |
| * @param state opaque data passed to the new netif |
| * @param init callback function that initializes the interface |
| * @param input callback function that... |
| * |
| * @return netif, or NULL if failed. |
| */ |
| struct netif * |
| netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask, |
| struct ip_addr *gw, |
| void *state, |
| err_t (* init)(struct netif *netif), |
| err_t (* input)(struct pbuf *p, struct netif *netif)) |
| { |
| static int netifnum = 0; |
| |
| |
| #if LWIP_DHCP |
| /* netif not under DHCP control by default */ |
| netif->dhcp = NULL; |
| #endif |
| /* remember netif specific state information data */ |
| netif->state = state; |
| netif->num = netifnum++; |
| netif->input = input; |
| |
| netif_set_addr(netif, ipaddr, netmask, gw); |
| |
| /* call user specified initialization function for netif */ |
| if (init(netif) != ERR_OK) { |
| return NULL; |
| } |
| |
| /* add this netif to the list */ |
| netif->next = netif_list; |
| netif_list = netif; |
| LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ", |
| netif->name[0], netif->name[1])); |
| ip_addr_debug_print(NETIF_DEBUG, ipaddr); |
| LWIP_DEBUGF(NETIF_DEBUG, (" netmask ")); |
| ip_addr_debug_print(NETIF_DEBUG, netmask); |
| LWIP_DEBUGF(NETIF_DEBUG, (" gw ")); |
| ip_addr_debug_print(NETIF_DEBUG, gw); |
| LWIP_DEBUGF(NETIF_DEBUG, ("\n")); |
| return netif; |
| } |
| |
| void |
| netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask, |
| struct ip_addr *gw) |
| { |
| netif_set_ipaddr(netif, ipaddr); |
| netif_set_netmask(netif, netmask); |
| netif_set_gw(netif, gw); |
| } |
| |
| void netif_remove(struct netif * netif) |
| { |
| if ( netif == NULL ) return; |
| |
| /* is it the first netif? */ |
| if (netif_list == netif) { |
| netif_list = netif->next; |
| } |
| else { |
| /* look for netif further down the list */ |
| struct netif * tmpNetif; |
| for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) { |
| if (tmpNetif->next == netif) { |
| tmpNetif->next = netif->next; |
| break; |
| } |
| } |
| if (tmpNetif == NULL) |
| return; /* we didn't find any netif today */ |
| } |
| /* this netif is default? */ |
| if (netif_default == netif) |
| /* reset default netif */ |
| netif_default = NULL; |
| LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") ); |
| } |
| |
| struct netif * |
| netif_find(char *name) |
| { |
| struct netif *netif; |
| u8_t num; |
| |
| if (name == NULL) { |
| return NULL; |
| } |
| |
| num = name[2] - '0'; |
| |
| for(netif = netif_list; netif != NULL; netif = netif->next) { |
| if (num == netif->num && |
| name[0] == netif->name[0] && |
| name[1] == netif->name[1]) { |
| LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1])); |
| return netif; |
| } |
| } |
| LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1])); |
| return NULL; |
| } |
| |
| void |
| netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr) |
| { |
| /* TODO: Handling of obsolete pcbs */ |
| /* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */ |
| #if LWIP_TCP |
| struct tcp_pcb *pcb; |
| struct tcp_pcb_listen *lpcb; |
| |
| /* address is actually being changed? */ |
| if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) |
| { |
| extern struct tcp_pcb *tcp_active_pcbs; |
| LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: netif address being changed\n")); |
| pcb = tcp_active_pcbs; |
| while (pcb != NULL) { |
| /* PCB bound to current local interface address? */ |
| if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) { |
| /* this connection must be aborted */ |
| struct tcp_pcb *next = pcb->next; |
| LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb)); |
| tcp_abort(pcb); |
| pcb = next; |
| } else { |
| pcb = pcb->next; |
| } |
| } |
| for (lpcb = tcp_listen_pcbs; lpcb != NULL; lpcb = lpcb->next) { |
| /* PCB bound to current local interface address? */ |
| if (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr))) { |
| /* The PCB is listening to the old ipaddr and |
| * is set to listen to the new one instead */ |
| ip_addr_set(&(lpcb->local_ip), ipaddr); |
| } |
| } |
| } |
| #endif |
| ip_addr_set(&(netif->ip_addr), ipaddr); |
| LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: IP address of interface %c%c set to %u.%u.%u.%u\n", |
| netif->name[0], netif->name[1], |
| (unsigned int)(ntohl(netif->ip_addr.addr) >> 24 & 0xff), |
| (unsigned int)(ntohl(netif->ip_addr.addr) >> 16 & 0xff), |
| (unsigned int)(ntohl(netif->ip_addr.addr) >> 8 & 0xff), |
| (unsigned int)(ntohl(netif->ip_addr.addr) & 0xff))); |
| } |
| |
| void |
| netif_set_gw(struct netif *netif, struct ip_addr *gw) |
| { |
| ip_addr_set(&(netif->gw), gw); |
| LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: GW address of interface %c%c set to %u.%u.%u.%u\n", |
| netif->name[0], netif->name[1], |
| (unsigned int)(ntohl(netif->gw.addr) >> 24 & 0xff), |
| (unsigned int)(ntohl(netif->gw.addr) >> 16 & 0xff), |
| (unsigned int)(ntohl(netif->gw.addr) >> 8 & 0xff), |
| (unsigned int)(ntohl(netif->gw.addr) & 0xff))); |
| } |
| |
| void |
| netif_set_netmask(struct netif *netif, struct ip_addr *netmask) |
| { |
| ip_addr_set(&(netif->netmask), netmask); |
| LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: netmask of interface %c%c set to %u.%u.%u.%u\n", |
| netif->name[0], netif->name[1], |
| (unsigned int)(ntohl(netif->netmask.addr) >> 24 & 0xff), |
| (unsigned int)(ntohl(netif->netmask.addr) >> 16 & 0xff), |
| (unsigned int)(ntohl(netif->netmask.addr) >> 8 & 0xff), |
| (unsigned int)(ntohl(netif->netmask.addr) & 0xff))); |
| } |
| |
| void |
| netif_set_default(struct netif *netif) |
| { |
| netif_default = netif; |
| LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n", |
| netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\'')); |
| } |
| |
| void |
| netif_init(void) |
| { |
| netif_list = netif_default = NULL; |
| } |
| |