+++ /dev/null
-/**
- * @file
- * lwIP network interface abstraction
- *
- */
-
-/*
- * Copyright (c) 2001-2004 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/ip_addr.h"
-#include "lwip/netif.h"
-#include "lwip/tcp.h"
-#include "lwip/snmp.h"
-#include "lwip/igmp.h"
-#include "netif/etharp.h"
-
-#if LWIP_NETIF_STATUS_CALLBACK
-#define NETIF_STATUS_CALLBACK(n) { if (n->status_callback) (n->status_callback)(n); }
-#else
-#define NETIF_STATUS_CALLBACK(n) { /* NOP */ }
-#endif /* LWIP_NETIF_STATUS_CALLBACK */
-
-#if LWIP_NETIF_LINK_CALLBACK
-#define NETIF_LINK_CALLBACK(n) { if (n->link_callback) (n->link_callback)(n); }
-#else
-#define NETIF_LINK_CALLBACK(n) { /* NOP */ }
-#endif /* LWIP_NETIF_LINK_CALLBACK */
-
-struct netif *netif_list;
-struct netif *netif_default;
-
-/**
- * Add a network interface to the list of lwIP netifs.
- *
- * @param netif a pre-allocated netif structure
- * @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 is called to pass
- * ingress packets up in the protocol layer stack.
- *
- * @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 u8_t netifnum = 0;
-
- /* reset new interface configuration state */
- netif->ip_addr.addr = 0;
- netif->netmask.addr = 0;
- netif->gw.addr = 0;
- netif->flags = 0;
-#if LWIP_DHCP
- /* netif not under DHCP control by default */
- netif->dhcp = NULL;
-#endif /* LWIP_DHCP */
-#if LWIP_AUTOIP
- /* netif not under AutoIP control by default */
- netif->autoip = NULL;
-#endif /* LWIP_AUTOIP */
-#if LWIP_NETIF_STATUS_CALLBACK
- netif->status_callback = NULL;
-#endif /* LWIP_NETIF_STATUS_CALLBACK */
-#if LWIP_NETIF_LINK_CALLBACK
- netif->link_callback = NULL;
-#endif /* LWIP_NETIF_LINK_CALLBACK */
-#if LWIP_IGMP
- netif->igmp_mac_filter = NULL;
-#endif /* LWIP_IGMP */
-
- /* remember netif specific state information data */
- netif->state = state;
- netif->num = netifnum++;
- netif->input = input;
-#if LWIP_NETIF_HWADDRHINT
- netif->addr_hint = NULL;
-#endif /* LWIP_NETIF_HWADDRHINT*/
-
- 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;
- snmp_inc_iflist();
-
-#if LWIP_IGMP
- /* start IGMP processing */
- if (netif->flags & NETIF_FLAG_IGMP) {
- igmp_start( netif);
- }
-#endif /* LWIP_IGMP */
-
- 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;
-}
-
-/**
- * Change IP address configuration for a network interface (including netmask
- * and default gateway).
- *
- * @param netif the network interface to change
- * @param ipaddr the new IP address
- * @param netmask the new netmask
- * @param gw the new default gateway
- */
-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);
-}
-
-/**
- * Remove a network interface from the list of lwIP netifs.
- *
- * @param netif the network interface to remove
- */
-void netif_remove(struct netif * netif)
-{
- if ( netif == NULL ) return;
-
-#if LWIP_IGMP
- /* stop IGMP processing */
- if (netif->flags & NETIF_FLAG_IGMP) {
- igmp_stop( netif);
- }
-#endif /* LWIP_IGMP */
-
- snmp_delete_ipaddridx_tree(netif);
-
- /* is it the first netif? */
- if (netif_list == netif) {
- netif_list = netif->next;
- snmp_dec_iflist();
- }
- 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;
- snmp_dec_iflist();
- break;
- }
- }
- if (tmpNetif == NULL)
- return; /* we didn't find any netif today */
- }
- /* this netif is default? */
- if (netif_default == netif)
- /* reset default netif */
- netif_set_default(NULL);
- LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
-}
-
-/**
- * Find a network interface by searching for its name
- *
- * @param name the name of the netif (like netif->name) plus concatenated number
- * in ascii representation (e.g. 'en0')
- */
-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;
-}
-
-/**
- * Change the IP address of a network interface
- *
- * @param netif the network interface to change
- * @param ipaddr the new IP address
- *
- * @note call netif_set_addr() if you also want to change netmask and
- * default gateway
- */
-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; defined by tcp.h */
- 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.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
- /* PCB bound to current local interface address? */
- if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
- (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
- snmp_delete_ipaddridx_tree(netif);
- snmp_delete_iprteidx_tree(0,netif);
- /* set new IP address to netif */
- ip_addr_set(&(netif->ip_addr), ipaddr);
- snmp_insert_ipaddridx_tree(netif);
- snmp_insert_iprteidx_tree(0,netif);
-
- LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
- netif->name[0], netif->name[1],
- ip4_addr1(&netif->ip_addr),
- ip4_addr2(&netif->ip_addr),
- ip4_addr3(&netif->ip_addr),
- ip4_addr4(&netif->ip_addr)));
-}
-
-/**
- * Change the default gateway for a network interface
- *
- * @param netif the network interface to change
- * @param gw the new default gateway
- *
- * @note call netif_set_addr() if you also want to change ip address and netmask
- */
-void
-netif_set_gw(struct netif *netif, struct ip_addr *gw)
-{
- ip_addr_set(&(netif->gw), gw);
- LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
- netif->name[0], netif->name[1],
- ip4_addr1(&netif->gw),
- ip4_addr2(&netif->gw),
- ip4_addr3(&netif->gw),
- ip4_addr4(&netif->gw)));
-}
-
-/**
- * Change the netmask of a network interface
- *
- * @param netif the network interface to change
- * @param netmask the new netmask
- *
- * @note call netif_set_addr() if you also want to change ip address and
- * default gateway
- */
-void
-netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
-{
- snmp_delete_iprteidx_tree(0, netif);
- /* set new netmask to netif */
- ip_addr_set(&(netif->netmask), netmask);
- snmp_insert_iprteidx_tree(0, netif);
- LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
- netif->name[0], netif->name[1],
- ip4_addr1(&netif->netmask),
- ip4_addr2(&netif->netmask),
- ip4_addr3(&netif->netmask),
- ip4_addr4(&netif->netmask)));
-}
-
-/**
- * Set a network interface as the default network interface
- * (used to output all packets for which no specific route is found)
- *
- * @param netif the default network interface
- */
-void
-netif_set_default(struct netif *netif)
-{
- if (netif == NULL)
- {
- /* remove default route */
- snmp_delete_iprteidx_tree(1, netif);
- }
- else
- {
- /* install default route */
- snmp_insert_iprteidx_tree(1, netif);
- }
- netif_default = netif;
- LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
- netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
-}
-
-/**
- * Bring an interface up, available for processing
- * traffic.
- *
- * @note: Enabling DHCP on a down interface will make it come
- * up once configured.
- *
- * @see dhcp_start()
- */
-void netif_set_up(struct netif *netif)
-{
- if ( !(netif->flags & NETIF_FLAG_UP )) {
- netif->flags |= NETIF_FLAG_UP;
-
-#if LWIP_SNMP
- snmp_get_sysuptime(&netif->ts);
-#endif /* LWIP_SNMP */
-
- NETIF_LINK_CALLBACK(netif);
- NETIF_STATUS_CALLBACK(netif);
-
-#if LWIP_ARP
- /** For Ethernet network interfaces, we would like to send a
- * "gratuitous ARP"; this is an ARP packet sent by a node in order
- * to spontaneously cause other nodes to update an entry in their
- * ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
- */
- if (netif->flags & NETIF_FLAG_ETHARP) {
- etharp_query(netif, &(netif->ip_addr), NULL);
- }
-#endif /* LWIP_ARP */
-
- }
-}
-
-/**
- * Bring an interface down, disabling any traffic processing.
- *
- * @note: Enabling DHCP on a down interface will make it come
- * up once configured.
- *
- * @see dhcp_start()
- */
-void netif_set_down(struct netif *netif)
-{
- if ( netif->flags & NETIF_FLAG_UP )
- {
- netif->flags &= ~NETIF_FLAG_UP;
-#if LWIP_SNMP
- snmp_get_sysuptime(&netif->ts);
-#endif
-
- NETIF_LINK_CALLBACK(netif);
- NETIF_STATUS_CALLBACK(netif);
- }
-}
-
-/**
- * Ask if an interface is up
- */
-u8_t netif_is_up(struct netif *netif)
-{
- return (netif->flags & NETIF_FLAG_UP)?1:0;
-}
-
-#if LWIP_NETIF_STATUS_CALLBACK
-/**
- * Set callback to be called when interface is brought up/down
- */
-void netif_set_status_callback(struct netif *netif, void (* status_callback)(struct netif *netif ))
-{
- if ( netif )
- netif->status_callback = status_callback;
-}
-#endif /* LWIP_NETIF_STATUS_CALLBACK */
-
-#if LWIP_NETIF_LINK_CALLBACK
-/**
- * Called by a driver when its link goes up
- */
-void netif_set_link_up(struct netif *netif )
-{
- netif->flags |= NETIF_FLAG_LINK_UP;
-
-#if LWIP_ARP
- /** For Ethernet network interfaces, we would like to send a
- * "gratuitous ARP"; this is an ARP packet sent by a node in order
- * to spontaneously cause other nodes to update an entry in their
- * ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
- */
- if (netif->flags & NETIF_FLAG_ETHARP) {
- etharp_query(netif, &(netif->ip_addr), NULL);
- }
-#endif /* LWIP_ARP */
-
-#if LWIP_IGMP
- /* resend IGMP memberships */
- if (netif->flags & NETIF_FLAG_IGMP) {
- igmp_report_groups( netif);
- }
-#endif /* LWIP_IGMP */
-
- NETIF_LINK_CALLBACK(netif);
-}
-
-/**
- * Called by a driver when its link goes down
- */
-void netif_set_link_down(struct netif *netif )
-{
- netif->flags &= ~NETIF_FLAG_LINK_UP;
- NETIF_LINK_CALLBACK(netif);
-}
-
-/**
- * Ask if a link is up
- */
-u8_t netif_is_link_up(struct netif *netif)
-{
- return (netif->flags & NETIF_FLAG_LINK_UP) ? 1 : 0;
-}
-
-/**
- * Set callback to be called when link is brought up/down
- */
-void netif_set_link_callback(struct netif *netif, void (* link_callback)(struct netif *netif ))
-{
- if ( netif )
- netif->link_callback = link_callback;
-}
-#endif /* LWIP_NETIF_LINK_CALLBACK */