lwip/src/core/netif.c

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/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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* 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"
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#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/netif.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
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* @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.
*/
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struct netif *
netif_add(struct ip_addr *ipaddr, struct ip_addr *netmask,
struct ip_addr *gw,
Add the following features and bugfixes: Added select() functionality to sockets library. Support for errno in sockets library. Byte ordering fixes. basic lwip_ioctl(), FIONREAD, get/setsockopt() etc. support - added additional argument to netif_add to pass state pointer so that the if_init function has access to context information before the interface is added, without accessing globals. - added netif_remove() - to conserve cpu load the tcpip_tcp_timer should only be active when tcbs that need it exist. - pass length of available data to callbacks for NETCONN_EVT_RCV events - added tcpip_link_input(), a hack to allow processing of PPP packets in tcpip_thread() context. This saves threads and context switches. - renamed incompatible ASSERT() macro to LWIP_ASSERT() to avoid name collision. - changed a bunch of %d's to %u's in format strings for unsigned values. - added ip_frag to lwip_stats. - changed IP_REASS_MAXAGE and IP_REASS_TMO defaults to more realistic values. - added sys_timeout_remove() function to cancel timeouts (needed by PPP amongst other things). - tolerate NULL returns from sys_arch_timeouts() since some threads might not need to use or have timeouts. - added sys_sem_wait_timeout() - moved mem_malloc() function to end of mem.c to work around tasking compiler bug. - automatically bind to local tcp port if 0. - allow customization of port ranges for automatic local bindings. - corrected various typos, spelling errors, etc.. Thanks to Marc Boucher for many of these changes.
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void *state,
err_t (* init)(struct netif *netif),
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err_t (* input)(struct pbuf *p, struct netif *netif))
{
struct netif *netif;
static int netifnum = 0;
netif = mem_malloc(sizeof(struct netif));
if(netif == NULL) {
return NULL;
}
Add the following features and bugfixes: Added select() functionality to sockets library. Support for errno in sockets library. Byte ordering fixes. basic lwip_ioctl(), FIONREAD, get/setsockopt() etc. support - added additional argument to netif_add to pass state pointer so that the if_init function has access to context information before the interface is added, without accessing globals. - added netif_remove() - to conserve cpu load the tcpip_tcp_timer should only be active when tcbs that need it exist. - pass length of available data to callbacks for NETCONN_EVT_RCV events - added tcpip_link_input(), a hack to allow processing of PPP packets in tcpip_thread() context. This saves threads and context switches. - renamed incompatible ASSERT() macro to LWIP_ASSERT() to avoid name collision. - changed a bunch of %d's to %u's in format strings for unsigned values. - added ip_frag to lwip_stats. - changed IP_REASS_MAXAGE and IP_REASS_TMO defaults to more realistic values. - added sys_timeout_remove() function to cancel timeouts (needed by PPP amongst other things). - tolerate NULL returns from sys_arch_timeouts() since some threads might not need to use or have timeouts. - added sys_sem_wait_timeout() - moved mem_malloc() function to end of mem.c to work around tasking compiler bug. - automatically bind to local tcp port if 0. - allow customization of port ranges for automatic local bindings. - corrected various typos, spelling errors, etc.. Thanks to Marc Boucher for many of these changes.
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netif->state = state;
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netif->num = netifnum++;
netif->input = input;
netif_set_addr(netif, ipaddr, netmask, gw);
if (init(netif) != ERR_OK) {
mem_free(netif);
return NULL;
}
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netif->next = netif_list;
netif_list = netif;
#if NETIF_DEBUG
DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
netif->name[0], netif->name[1]));
ip_addr_debug_print(ipaddr);
DEBUGF(NETIF_DEBUG, (" netmask "));
ip_addr_debug_print(netmask);
DEBUGF(NETIF_DEBUG, (" gw "));
ip_addr_debug_print(gw);
DEBUGF(NETIF_DEBUG, ("\n"));
#endif /* NETIF_DEBUG */
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);
}
Add the following features and bugfixes: Added select() functionality to sockets library. Support for errno in sockets library. Byte ordering fixes. basic lwip_ioctl(), FIONREAD, get/setsockopt() etc. support - added additional argument to netif_add to pass state pointer so that the if_init function has access to context information before the interface is added, without accessing globals. - added netif_remove() - to conserve cpu load the tcpip_tcp_timer should only be active when tcbs that need it exist. - pass length of available data to callbacks for NETCONN_EVT_RCV events - added tcpip_link_input(), a hack to allow processing of PPP packets in tcpip_thread() context. This saves threads and context switches. - renamed incompatible ASSERT() macro to LWIP_ASSERT() to avoid name collision. - changed a bunch of %d's to %u's in format strings for unsigned values. - added ip_frag to lwip_stats. - changed IP_REASS_MAXAGE and IP_REASS_TMO defaults to more realistic values. - added sys_timeout_remove() function to cancel timeouts (needed by PPP amongst other things). - tolerate NULL returns from sys_arch_timeouts() since some threads might not need to use or have timeouts. - added sys_sem_wait_timeout() - moved mem_malloc() function to end of mem.c to work around tasking compiler bug. - automatically bind to local tcp port if 0. - allow customization of port ranges for automatic local bindings. - corrected various typos, spelling errors, etc.. Thanks to Marc Boucher for many of these changes.
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/*-----------------------------------------------------------------------------------*/
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 */
}
if(netif_default == netif)
netif_default = NULL;
DEBUGF(NETIF_DEBUG, ("netif_remove: removed netif"));
mem_free( netif );
}
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/*-----------------------------------------------------------------------------------*/
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]) {
DEBUGF(NETIF_DEBUG, ("netif_find: found %s\n", name));
return netif;
}
}
DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %s\n", name));
return NULL;
}
/*-----------------------------------------------------------------------------------*/
void
netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
{
ip_addr_set(&(netif->ip_addr), ipaddr);
DEBUGF(NETIF_DEBUG, ("netif: setting IP address of interface %c%c to %d.%d.%d.%d\n",
netif->name[0], netif->name[1],
(u8_t)(ntohl(ipaddr->addr) >> 24 & 0xff),
(u8_t)(ntohl(ipaddr->addr) >> 16 & 0xff),
(u8_t)(ntohl(ipaddr->addr) >> 8 & 0xff),
(u8_t)(ntohl(ipaddr->addr) & 0xff)));
}
/*-----------------------------------------------------------------------------------*/
void
netif_set_gw(struct netif *netif, struct ip_addr *gw)
{
ip_addr_set(&(netif->gw), gw);
}
/*-----------------------------------------------------------------------------------*/
void
netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
{
ip_addr_set(&(netif->netmask), netmask);
}
/*-----------------------------------------------------------------------------------*/
void
netif_set_default(struct netif *netif)
{
netif_default = netif;
DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
Add the following features and bugfixes: Added select() functionality to sockets library. Support for errno in sockets library. Byte ordering fixes. basic lwip_ioctl(), FIONREAD, get/setsockopt() etc. support - added additional argument to netif_add to pass state pointer so that the if_init function has access to context information before the interface is added, without accessing globals. - added netif_remove() - to conserve cpu load the tcpip_tcp_timer should only be active when tcbs that need it exist. - pass length of available data to callbacks for NETCONN_EVT_RCV events - added tcpip_link_input(), a hack to allow processing of PPP packets in tcpip_thread() context. This saves threads and context switches. - renamed incompatible ASSERT() macro to LWIP_ASSERT() to avoid name collision. - changed a bunch of %d's to %u's in format strings for unsigned values. - added ip_frag to lwip_stats. - changed IP_REASS_MAXAGE and IP_REASS_TMO defaults to more realistic values. - added sys_timeout_remove() function to cancel timeouts (needed by PPP amongst other things). - tolerate NULL returns from sys_arch_timeouts() since some threads might not need to use or have timeouts. - added sys_sem_wait_timeout() - moved mem_malloc() function to end of mem.c to work around tasking compiler bug. - automatically bind to local tcp port if 0. - allow customization of port ranges for automatic local bindings. - corrected various typos, spelling errors, etc.. Thanks to Marc Boucher for many of these changes.
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netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
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}
/*-----------------------------------------------------------------------------------*/
void
netif_init(void)
{
netif_list = netif_default = NULL;
}
/*-----------------------------------------------------------------------------------*/