1079 lines
30 KiB
C
Executable file
1079 lines
30 KiB
C
Executable file
/**
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* @file
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* lwIP network interface abstraction
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*
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#include "lwip/opt.h"
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#include "lwip/def.h"
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#include "lwip/ip_addr.h"
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#include "lwip/ip6_addr.h"
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#include "lwip/netif.h"
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#include "lwip/priv/tcp_priv.h"
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#include "lwip/udp.h"
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#include "lwip/snmp.h"
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#include "lwip/igmp.h"
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#include "netif/etharp.h"
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#include "lwip/stats.h"
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#include "lwip/sys.h"
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#if ENABLE_LOOPBACK
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#include "lwip/sys.h"
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#if LWIP_NETIF_LOOPBACK_MULTITHREADING
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#include "lwip/tcpip.h"
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#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
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#endif /* ENABLE_LOOPBACK */
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#if LWIP_AUTOIP
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#include "lwip/autoip.h"
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#endif /* LWIP_AUTOIP */
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#if LWIP_DHCP
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#include "lwip/dhcp.h"
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#endif /* LWIP_DHCP */
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#if LWIP_IPV6_DHCP6
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#include "lwip/dhcp6.h"
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#endif /* LWIP_IPV6_DHCP6 */
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#if LWIP_IPV6_MLD
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#include "lwip/mld6.h"
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#endif /* LWIP_IPV6_MLD */
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#if LWIP_NETIF_STATUS_CALLBACK
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#define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
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#else
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#define NETIF_STATUS_CALLBACK(n)
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#endif /* LWIP_NETIF_STATUS_CALLBACK */
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#if LWIP_NETIF_LINK_CALLBACK
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#define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
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#else
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#define NETIF_LINK_CALLBACK(n)
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#endif /* LWIP_NETIF_LINK_CALLBACK */
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#ifdef MEMLEAK_DEBUG
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static const char mem_debug_file[] ICACHE_RODATA_ATTR STORE_ATTR = __FILE__;
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#endif
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struct netif *netif_list;
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struct netif *netif_default;
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static u8_t netif_num;
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#define NETIF_REPORT_TYPE_IPV4 0x01
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#define NETIF_REPORT_TYPE_IPV6 0x02
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static void netif_issue_reports(struct netif* netif, u8_t report_type);
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#if LWIP_IPV6
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static err_t netif_null_output_ip6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipaddr);
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#endif /* LWIP_IPV6 */
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#if LWIP_HAVE_LOOPIF
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#if LWIP_IPV4
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static err_t netif_loop_output_ipv4(struct netif *netif, struct pbuf *p, const ip4_addr_t* addr);
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#endif
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#if LWIP_IPV6
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static err_t netif_loop_output_ipv6(struct netif *netif, struct pbuf *p, const ip6_addr_t* addr);
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#endif
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static struct netif loop_netif;
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/**
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* Initialize a lwip network interface structure for a loopback interface
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*
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* @param netif the lwip network interface structure for this loopif
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* @return ERR_OK if the loopif is initialized
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* ERR_MEM if private data couldn't be allocated
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*/
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static err_t
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netif_loopif_init(struct netif *netif)
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{
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/* initialize the snmp variables and counters inside the struct netif
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* ifSpeed: no assumption can be made!
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*/
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MIB2_INIT_NETIF(netif, snmp_ifType_softwareLoopback, 0);
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netif->name[0] = 'l';
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netif->name[1] = 'o';
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#if LWIP_IPV4
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netif->output = netif_loop_output_ipv4;
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#endif
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#if LWIP_IPV6
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netif->output_ip6 = netif_loop_output_ipv6;
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#endif
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#if LWIP_LOOPIF_MULTICAST
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netif->flags |= NETIF_FLAG_IGMP;
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#endif
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return ERR_OK;
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}
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#endif /* LWIP_HAVE_LOOPIF */
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void
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netif_init(void)
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{
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#if LWIP_HAVE_LOOPIF
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#if LWIP_IPV4
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#define LOOPIF_ADDRINIT &loop_ipaddr, &loop_netmask, &loop_gw,
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ip4_addr_t loop_ipaddr, loop_netmask, loop_gw;
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IP4_ADDR(&loop_gw, 127,0,0,1);
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IP4_ADDR(&loop_ipaddr, 127,0,0,1);
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IP4_ADDR(&loop_netmask, 255,0,0,0);
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#else /* LWIP_IPV4 */
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#define LOOPIF_ADDRINIT
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#endif /* LWIP_IPV4 */
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#if NO_SYS
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netif_add(&loop_netif, LOOPIF_ADDRINIT NULL, netif_loopif_init, ip_input);
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#else /* NO_SYS */
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netif_add(&loop_netif, LOOPIF_ADDRINIT NULL, netif_loopif_init, tcpip_input);
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#endif /* NO_SYS */
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#if LWIP_IPV6
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IP_ADDR6(loop_netif.ip6_addr, 0, 0, 0, PP_HTONL(0x00000001UL));
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loop_netif.ip6_addr_state[0] = IP6_ADDR_VALID;
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#endif /* LWIP_IPV6 */
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netif_set_link_up(&loop_netif);
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netif_set_up(&loop_netif);
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#endif /* LWIP_HAVE_LOOPIF */
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}
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/**
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* Add a network interface to the list of lwIP netifs.
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*
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* @param netif a pre-allocated netif structure
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* @param ipaddr IP address for the new netif
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* @param netmask network mask for the new netif
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* @param gw default gateway IP address for the new netif
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* @param state opaque data passed to the new netif
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* @param init callback function that initializes the interface
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* @param input callback function that is called to pass
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* ingress packets up in the protocol layer stack.
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*
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* @return netif, or NULL if failed.
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*/
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struct netif *
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netif_add(struct netif *netif,
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#if LWIP_IPV4
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const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw,
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#endif /* LWIP_IPV4 */
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void *state, netif_init_fn init, netif_input_fn input)
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{
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#if LWIP_IPV6
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u32_t i;
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#endif
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LWIP_ASSERT("No init function given", init != NULL);
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/* reset new interface configuration state */
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#if LWIP_IPV4
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ip_addr_set_zero_ip4(&netif->ip_addr);
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ip_addr_set_zero_ip4(&netif->netmask);
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ip_addr_set_zero_ip4(&netif->gw);
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#endif /* LWIP_IPV4 */
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#if LWIP_IPV6
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for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
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ip_addr_set_zero_ip6(&netif->ip6_addr[i]);
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netif_ip6_addr_set_state(netif, i, IP6_ADDR_INVALID);
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}
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netif->output_ip6 = netif_null_output_ip6;
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#endif /* LWIP_IPV6 */
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NETIF_SET_CHECKSUM_CTRL(netif, NETIF_CHECKSUM_ENABLE_ALL);
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netif->flags = 0;
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#if LWIP_DHCP
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/* netif not under DHCP control by default */
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netif->dhcp = NULL;
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#ifdef LWIP_ESP8266
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netif->dhcps_pcb = NULL;
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#endif
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#endif /* LWIP_DHCP */
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#if LWIP_AUTOIP
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/* netif not under AutoIP control by default */
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netif->autoip = NULL;
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#endif /* LWIP_AUTOIP */
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#if LWIP_IPV6_AUTOCONFIG
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#ifdef LWIP_ESP8266
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//#if 0
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netif->ip6_autoconfig_enabled = 1;
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#else
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/* IPv6 address autoconfiguration not enabled by default */
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netif->ip6_autoconfig_enabled = 0;
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#endif
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#endif /* LWIP_IPV6_AUTOCONFIG */
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#if LWIP_IPV6_SEND_ROUTER_SOLICIT
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netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT;
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#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
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#if LWIP_IPV6_DHCP6
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/* netif not under DHCPv6 control by default */
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netif->dhcp6 = NULL;
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#endif /* LWIP_IPV6_DHCP6 */
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#if LWIP_NETIF_STATUS_CALLBACK
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netif->status_callback = NULL;
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#endif /* LWIP_NETIF_STATUS_CALLBACK */
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#if LWIP_NETIF_LINK_CALLBACK
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netif->link_callback = NULL;
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#endif /* LWIP_NETIF_LINK_CALLBACK */
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#if LWIP_IGMP
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netif->igmp_mac_filter = NULL;
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#endif /* LWIP_IGMP */
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#if LWIP_IPV6 && LWIP_IPV6_MLD
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netif->mld_mac_filter = NULL;
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#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
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#if ENABLE_LOOPBACK
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netif->loop_first = NULL;
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netif->loop_last = NULL;
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#endif /* ENABLE_LOOPBACK */
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/* remember netif specific state information data */
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netif->state = state;
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netif->num = netif_num++;
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netif->input = input;
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NETIF_SET_HWADDRHINT(netif, NULL);
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#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
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netif->loop_cnt_current = 0;
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#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
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#if LWIP_IPV4
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netif_set_addr(netif, ipaddr, netmask, gw);
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#endif /* LWIP_IPV4 */
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/* call user specified initialization function for netif */
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if (init(netif) != ERR_OK) {
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return NULL;
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}
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/* add this netif to the list */
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netif->next = netif_list;
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netif_list = netif;
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mib2_netif_added(netif);
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#if LWIP_IGMP
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/* start IGMP processing */
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if (netif->flags & NETIF_FLAG_IGMP) {
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igmp_start(netif);
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}
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#endif /* LWIP_IGMP */
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LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP",
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netif->name[0], netif->name[1]));
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#if LWIP_IPV4
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LWIP_DEBUGF(NETIF_DEBUG, (" addr "));
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ip4_addr_debug_print(NETIF_DEBUG, ipaddr);
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LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
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ip4_addr_debug_print(NETIF_DEBUG, netmask);
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LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
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ip4_addr_debug_print(NETIF_DEBUG, gw);
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#endif /* LWIP_IPV4 */
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LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
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return netif;
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}
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#if LWIP_IPV4
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/**
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* Change IP address configuration for a network interface (including netmask
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* and default gateway).
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*
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* @param netif the network interface to change
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* @param ipaddr the new IP address
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* @param netmask the new netmask
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* @param gw the new default gateway
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*/
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void
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netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *netmask,
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const ip4_addr_t *gw)
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{
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netif_set_netmask(netif, netmask);
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netif_set_gw(netif, gw);
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/* set ipaddr last to ensure netmask/gw have been set when status callback is called */
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netif_set_ipaddr(netif, ipaddr);
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}
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#endif /* LWIP_IPV4*/
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/**
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* Remove a network interface from the list of lwIP netifs.
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*
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* @param netif the network interface to remove
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*/
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void
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netif_remove(struct netif *netif)
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{
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if (netif == NULL) {
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return;
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}
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#if LWIP_IPV4
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if (!ip4_addr_isany_val(*netif_ip4_addr(netif))) {
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#if LWIP_TCP
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tcp_netif_ipv4_addr_changed(netif_ip4_addr(netif), NULL);
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#endif /* LWIP_TCP */
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/* cannot do this for UDP, as there is no 'err' callback in udp pcbs */
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}
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#if LWIP_IGMP
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/* stop IGMP processing */
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if (netif->flags & NETIF_FLAG_IGMP) {
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igmp_stop(netif);
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}
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#endif /* LWIP_IGMP */
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#endif /* LWIP_IPV4*/
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#if LWIP_IPV6 && LWIP_IPV6_MLD
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/* stop MLD processing */
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mld6_stop(netif);
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#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
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if (netif_is_up(netif)) {
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/* set netif down before removing (call callback function) */
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netif_set_down(netif);
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}
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mib2_remove_ip4(netif);
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/* this netif is default? */
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if (netif_default == netif) {
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/* reset default netif */
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netif_set_default(NULL);
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}
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/* is it the first netif? */
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if (netif_list == netif) {
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netif_list = netif->next;
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} else {
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/* look for netif further down the list */
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struct netif * tmp_netif;
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for (tmp_netif = netif_list; tmp_netif != NULL; tmp_netif = tmp_netif->next) {
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if (tmp_netif->next == netif) {
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tmp_netif->next = netif->next;
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break;
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}
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}
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if (tmp_netif == NULL) {
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return; /* netif is not on the list */
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}
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}
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mib2_netif_removed(netif);
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#if LWIP_NETIF_REMOVE_CALLBACK
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if (netif->remove_callback) {
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netif->remove_callback(netif);
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}
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#endif /* LWIP_NETIF_REMOVE_CALLBACK */
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LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
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}
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/**
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* Find a network interface by searching for its name
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*
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* @param name the name of the netif (like netif->name) plus concatenated number
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* in ascii representation (e.g. 'en0')
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*/
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struct netif *
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netif_find(const char *name)
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{
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struct netif *netif;
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u8_t num;
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if (name == NULL) {
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return NULL;
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}
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num = name[2] - '0';
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for (netif = netif_list; netif != NULL; netif = netif->next) {
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if (num == netif->num &&
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name[0] == netif->name[0] &&
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name[1] == netif->name[1]) {
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LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
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return netif;
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}
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}
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LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
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return NULL;
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}
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#if LWIP_IPV4
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/**
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* Change the IP address of a network interface
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*
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* @param netif the network interface to change
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* @param ipaddr the new IP address
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*
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* @note call netif_set_addr() if you also want to change netmask and
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* default gateway
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*/
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void
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netif_set_ipaddr(struct netif *netif, const ip4_addr_t *ipaddr)
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{
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ip4_addr_t new_addr = (ipaddr ? *ipaddr : *IP4_ADDR_ANY);
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/* address is actually being changed? */
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if (ip4_addr_cmp(&new_addr, netif_ip4_addr(netif)) == 0) {
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LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
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#if LWIP_TCP
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tcp_netif_ipv4_addr_changed(netif_ip4_addr(netif), ipaddr);
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#endif /* LWIP_TCP */
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#if LWIP_UDP
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udp_netif_ipv4_addr_changed(netif_ip4_addr(netif), ipaddr);
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#endif /* LWIP_UDP */
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mib2_remove_ip4(netif);
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mib2_remove_route_ip4(0, netif);
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/* set new IP address to netif */
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ip4_addr_set(ip_2_ip4(&netif->ip_addr), ipaddr);
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IP_SET_TYPE_VAL(netif->ip_addr, IPADDR_TYPE_V4);
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mib2_add_ip4(netif);
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mib2_add_route_ip4(0, netif);
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netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV4);
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NETIF_STATUS_CALLBACK(netif);
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}
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|
|
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("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_16(netif_ip4_addr(netif)),
|
|
ip4_addr2_16(netif_ip4_addr(netif)),
|
|
ip4_addr3_16(netif_ip4_addr(netif)),
|
|
ip4_addr4_16(netif_ip4_addr(netif))));
|
|
}
|
|
|
|
/**
|
|
* 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, const ip4_addr_t *gw)
|
|
{
|
|
ip4_addr_set(ip_2_ip4(&netif->gw), gw);
|
|
IP_SET_TYPE_VAL(netif->gw, IPADDR_TYPE_V4);
|
|
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("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_16(netif_ip4_gw(netif)),
|
|
ip4_addr2_16(netif_ip4_gw(netif)),
|
|
ip4_addr3_16(netif_ip4_gw(netif)),
|
|
ip4_addr4_16(netif_ip4_gw(netif))));
|
|
}
|
|
|
|
/**
|
|
* 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, const ip4_addr_t *netmask)
|
|
{
|
|
mib2_remove_route_ip4(0, netif);
|
|
/* set new netmask to netif */
|
|
ip4_addr_set(ip_2_ip4(&netif->netmask), netmask);
|
|
IP_SET_TYPE_VAL(netif->netmask, IPADDR_TYPE_V4);
|
|
mib2_add_route_ip4(0, netif);
|
|
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("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_16(netif_ip4_netmask(netif)),
|
|
ip4_addr2_16(netif_ip4_netmask(netif)),
|
|
ip4_addr3_16(netif_ip4_netmask(netif)),
|
|
ip4_addr4_16(netif_ip4_netmask(netif))));
|
|
}
|
|
#endif /* LWIP_IPV4 */
|
|
|
|
/**
|
|
* 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 */
|
|
mib2_remove_route_ip4(1, netif);
|
|
} else {
|
|
/* install default route */
|
|
mib2_add_route_ip4(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.
|
|
*/
|
|
void
|
|
netif_set_up(struct netif *netif)
|
|
{
|
|
if (!(netif->flags & NETIF_FLAG_UP)) {
|
|
netif->flags |= NETIF_FLAG_UP;
|
|
|
|
MIB2_COPY_SYSUPTIME_TO(&netif->ts);
|
|
|
|
NETIF_STATUS_CALLBACK(netif);
|
|
|
|
if (netif->flags & NETIF_FLAG_LINK_UP) {
|
|
netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV4|NETIF_REPORT_TYPE_IPV6);
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Send ARP/IGMP/MLD/RS events, e.g. on link-up/netif-up or addr-change
|
|
*/
|
|
static void
|
|
netif_issue_reports(struct netif* netif, u8_t report_type)
|
|
{
|
|
#if LWIP_IPV4
|
|
if ((report_type & NETIF_REPORT_TYPE_IPV4) &&
|
|
!ip4_addr_isany_val(*netif_ip4_addr(netif))) {
|
|
#if LWIP_ARP
|
|
/* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
|
|
if (netif->flags & (NETIF_FLAG_ETHARP)) {
|
|
etharp_gratuitous(netif);
|
|
}
|
|
#endif /* LWIP_ARP */
|
|
|
|
#if LWIP_IGMP
|
|
/* resend IGMP memberships */
|
|
if (netif->flags & NETIF_FLAG_IGMP) {
|
|
igmp_report_groups(netif);
|
|
}
|
|
#endif /* LWIP_IGMP */
|
|
}
|
|
#endif /* LWIP_IPV4 */
|
|
|
|
#if LWIP_IPV6
|
|
if (report_type & NETIF_REPORT_TYPE_IPV6) {
|
|
#if LWIP_IPV6_MLD
|
|
/* send mld memberships */
|
|
mld6_report_groups(netif);
|
|
#endif /* LWIP_IPV6_MLD */
|
|
#if LWIP_IPV6_SEND_ROUTER_SOLICIT
|
|
/* Send Router Solicitation messages. */
|
|
netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT;
|
|
#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
|
|
}
|
|
#endif /* LWIP_IPV6 */
|
|
}
|
|
|
|
/**
|
|
* Bring an interface down, disabling any traffic processing.
|
|
*/
|
|
void
|
|
netif_set_down(struct netif *netif)
|
|
{
|
|
if (netif->flags & NETIF_FLAG_UP) {
|
|
netif->flags &= ~NETIF_FLAG_UP;
|
|
MIB2_COPY_SYSUPTIME_TO(&netif->ts);
|
|
|
|
#if LWIP_IPV4 && LWIP_ARP
|
|
if (netif->flags & NETIF_FLAG_ETHARP) {
|
|
etharp_cleanup_netif(netif);
|
|
}
|
|
#endif /* LWIP_IPV4 && LWIP_ARP */
|
|
NETIF_STATUS_CALLBACK(netif);
|
|
}
|
|
}
|
|
|
|
#if LWIP_NETIF_STATUS_CALLBACK
|
|
/**
|
|
* Set callback to be called when interface is brought up/down or address is changed while up
|
|
*/
|
|
void
|
|
netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
|
|
{
|
|
if (netif) {
|
|
netif->status_callback = status_callback;
|
|
}
|
|
}
|
|
#endif /* LWIP_NETIF_STATUS_CALLBACK */
|
|
|
|
#if LWIP_NETIF_REMOVE_CALLBACK
|
|
/**
|
|
* Set callback to be called when the interface has been removed
|
|
*/
|
|
void
|
|
netif_set_remove_callback(struct netif *netif, netif_status_callback_fn remove_callback)
|
|
{
|
|
if (netif) {
|
|
netif->remove_callback = remove_callback;
|
|
}
|
|
}
|
|
#endif /* LWIP_NETIF_REMOVE_CALLBACK */
|
|
|
|
/**
|
|
* Called by a driver when its link goes up
|
|
*/
|
|
void
|
|
netif_set_link_up(struct netif *netif)
|
|
{
|
|
if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
|
|
netif->flags |= NETIF_FLAG_LINK_UP;
|
|
|
|
#if LWIP_DHCP
|
|
if (netif->dhcp) {
|
|
dhcp_network_changed(netif);
|
|
}
|
|
#endif /* LWIP_DHCP */
|
|
|
|
#if LWIP_AUTOIP
|
|
if (netif->autoip) {
|
|
autoip_network_changed(netif);
|
|
}
|
|
#endif /* LWIP_AUTOIP */
|
|
|
|
if (netif->flags & NETIF_FLAG_UP) {
|
|
netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV4|NETIF_REPORT_TYPE_IPV6);
|
|
}
|
|
NETIF_LINK_CALLBACK(netif);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called by a driver when its link goes down
|
|
*/
|
|
void
|
|
netif_set_link_down(struct netif *netif )
|
|
{
|
|
if (netif->flags & NETIF_FLAG_LINK_UP) {
|
|
netif->flags &= ~NETIF_FLAG_LINK_UP;
|
|
NETIF_LINK_CALLBACK(netif);
|
|
}
|
|
}
|
|
|
|
#if LWIP_NETIF_LINK_CALLBACK
|
|
/**
|
|
* Set callback to be called when link is brought up/down
|
|
*/
|
|
void
|
|
netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
|
|
{
|
|
if (netif) {
|
|
netif->link_callback = link_callback;
|
|
}
|
|
}
|
|
#endif /* LWIP_NETIF_LINK_CALLBACK */
|
|
|
|
#if ENABLE_LOOPBACK
|
|
/**
|
|
* Send an IP packet to be received on the same netif (loopif-like).
|
|
* The pbuf is simply copied and handed back to netif->input.
|
|
* In multithreaded mode, this is done directly since netif->input must put
|
|
* the packet on a queue.
|
|
* In callback mode, the packet is put on an internal queue and is fed to
|
|
* netif->input by netif_poll().
|
|
*
|
|
* @param netif the lwip network interface structure
|
|
* @param p the (IP) packet to 'send'
|
|
* @return ERR_OK if the packet has been sent
|
|
* ERR_MEM if the pbuf used to copy the packet couldn't be allocated
|
|
*/
|
|
err_t
|
|
netif_loop_output(struct netif *netif, struct pbuf *p)
|
|
{
|
|
struct pbuf *r;
|
|
err_t err;
|
|
struct pbuf *last;
|
|
#if LWIP_LOOPBACK_MAX_PBUFS
|
|
u8_t clen = 0;
|
|
#endif /* LWIP_LOOPBACK_MAX_PBUFS */
|
|
/* If we have a loopif, SNMP counters are adjusted for it,
|
|
* if not they are adjusted for 'netif'. */
|
|
#if MIB2_STATS
|
|
#if LWIP_HAVE_LOOPIF
|
|
struct netif *stats_if = &loop_netif;
|
|
#else /* LWIP_HAVE_LOOPIF */
|
|
struct netif *stats_if = netif;
|
|
#endif /* LWIP_HAVE_LOOPIF */
|
|
#endif /* MIB2_STATS */
|
|
SYS_ARCH_DECL_PROTECT(lev);
|
|
|
|
/* Allocate a new pbuf */
|
|
r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
|
|
if (r == NULL) {
|
|
LINK_STATS_INC(link.memerr);
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards);
|
|
return ERR_MEM;
|
|
}
|
|
#if LWIP_LOOPBACK_MAX_PBUFS
|
|
clen = pbuf_clen(r);
|
|
/* check for overflow or too many pbuf on queue */
|
|
if (((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
|
|
((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
|
|
pbuf_free(r);
|
|
LINK_STATS_INC(link.memerr);
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards);
|
|
return ERR_MEM;
|
|
}
|
|
netif->loop_cnt_current += clen;
|
|
#endif /* LWIP_LOOPBACK_MAX_PBUFS */
|
|
|
|
/* Copy the whole pbuf queue p into the single pbuf r */
|
|
if ((err = pbuf_copy(r, p)) != ERR_OK) {
|
|
pbuf_free(r);
|
|
LINK_STATS_INC(link.memerr);
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards);
|
|
return err;
|
|
}
|
|
|
|
/* Put the packet on a linked list which gets emptied through calling
|
|
netif_poll(). */
|
|
|
|
/* let last point to the last pbuf in chain r */
|
|
for (last = r; last->next != NULL; last = last->next);
|
|
|
|
SYS_ARCH_PROTECT(lev);
|
|
if (netif->loop_first != NULL) {
|
|
LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
|
|
netif->loop_last->next = r;
|
|
netif->loop_last = last;
|
|
} else {
|
|
netif->loop_first = r;
|
|
netif->loop_last = last;
|
|
}
|
|
SYS_ARCH_UNPROTECT(lev);
|
|
|
|
LINK_STATS_INC(link.xmit);
|
|
MIB2_STATS_NETIF_ADD(stats_if, ifoutoctets, p->tot_len);
|
|
MIB2_STATS_NETIF_INC(stats_if, ifoutucastpkts);
|
|
|
|
#if LWIP_NETIF_LOOPBACK_MULTITHREADING
|
|
/* For multithreading environment, schedule a call to netif_poll */
|
|
tcpip_callback_with_block((tcpip_callback_fn)netif_poll, netif, 0);
|
|
#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
|
|
|
|
return ERR_OK;
|
|
}
|
|
|
|
#if LWIP_HAVE_LOOPIF
|
|
#if LWIP_IPV4
|
|
static err_t
|
|
netif_loop_output_ipv4(struct netif *netif, struct pbuf *p, const ip4_addr_t* addr)
|
|
{
|
|
LWIP_UNUSED_ARG(addr);
|
|
return netif_loop_output(netif, p);
|
|
}
|
|
#endif /* LWIP_IPV4 */
|
|
|
|
#if LWIP_IPV6
|
|
static err_t
|
|
netif_loop_output_ipv6(struct netif *netif, struct pbuf *p, const ip6_addr_t* addr)
|
|
{
|
|
LWIP_UNUSED_ARG(addr);
|
|
return netif_loop_output(netif, p);
|
|
}
|
|
#endif /* LWIP_IPV6 */
|
|
#endif /* LWIP_HAVE_LOOPIF */
|
|
|
|
|
|
/**
|
|
* Call netif_poll() in the main loop of your application. This is to prevent
|
|
* reentering non-reentrant functions like tcp_input(). Packets passed to
|
|
* netif_loop_output() are put on a list that is passed to netif->input() by
|
|
* netif_poll().
|
|
*/
|
|
void
|
|
netif_poll(struct netif *netif)
|
|
{
|
|
struct pbuf *in;
|
|
/* If we have a loopif, SNMP counters are adjusted for it,
|
|
* if not they are adjusted for 'netif'. */
|
|
#if MIB2_STATS
|
|
#if LWIP_HAVE_LOOPIF
|
|
struct netif *stats_if = &loop_netif;
|
|
#else /* LWIP_HAVE_LOOPIF */
|
|
struct netif *stats_if = netif;
|
|
#endif /* LWIP_HAVE_LOOPIF */
|
|
#endif /* MIB2_STATS */
|
|
SYS_ARCH_DECL_PROTECT(lev);
|
|
|
|
do {
|
|
/* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
|
|
SYS_ARCH_PROTECT(lev);
|
|
in = netif->loop_first;
|
|
if (in != NULL) {
|
|
struct pbuf *in_end = in;
|
|
#if LWIP_LOOPBACK_MAX_PBUFS
|
|
u8_t clen = 1;
|
|
#endif /* LWIP_LOOPBACK_MAX_PBUFS */
|
|
while (in_end->len != in_end->tot_len) {
|
|
LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
|
|
in_end = in_end->next;
|
|
#if LWIP_LOOPBACK_MAX_PBUFS
|
|
clen++;
|
|
#endif /* LWIP_LOOPBACK_MAX_PBUFS */
|
|
}
|
|
#if LWIP_LOOPBACK_MAX_PBUFS
|
|
/* adjust the number of pbufs on queue */
|
|
LWIP_ASSERT("netif->loop_cnt_current underflow",
|
|
((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
|
|
netif->loop_cnt_current -= clen;
|
|
#endif /* LWIP_LOOPBACK_MAX_PBUFS */
|
|
|
|
/* 'in_end' now points to the last pbuf from 'in' */
|
|
if (in_end == netif->loop_last) {
|
|
/* this was the last pbuf in the list */
|
|
netif->loop_first = netif->loop_last = NULL;
|
|
} else {
|
|
/* pop the pbuf off the list */
|
|
netif->loop_first = in_end->next;
|
|
LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
|
|
}
|
|
/* De-queue the pbuf from its successors on the 'loop_' list. */
|
|
in_end->next = NULL;
|
|
}
|
|
SYS_ARCH_UNPROTECT(lev);
|
|
|
|
if (in != NULL) {
|
|
LINK_STATS_INC(link.recv);
|
|
MIB2_STATS_NETIF_ADD(stats_if, ifinoctets, in->tot_len);
|
|
MIB2_STATS_NETIF_INC(stats_if, ifinucastpkts);
|
|
/* loopback packets are always IP packets! */
|
|
if (ip_input(in, netif) != ERR_OK) {
|
|
pbuf_free(in);
|
|
}
|
|
/* Don't reference the packet any more! */
|
|
in = NULL;
|
|
}
|
|
/* go on while there is a packet on the list */
|
|
} while (netif->loop_first != NULL);
|
|
}
|
|
|
|
#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
|
|
/**
|
|
* Calls netif_poll() for every netif on the netif_list.
|
|
*/
|
|
void
|
|
netif_poll_all(void)
|
|
{
|
|
struct netif *netif = netif_list;
|
|
/* loop through netifs */
|
|
while (netif != NULL) {
|
|
netif_poll(netif);
|
|
/* proceed to next network interface */
|
|
netif = netif->next;
|
|
}
|
|
}
|
|
#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
|
|
#endif /* ENABLE_LOOPBACK */
|
|
|
|
#if LWIP_IPV6
|
|
/** Checks if a specific address is assigned to the netif and returns its
|
|
* index.
|
|
*
|
|
* @param netif the netif to check
|
|
* @param ip6addr the IPv6 address to find
|
|
* @return >= 0: address found, this is its index
|
|
* -1: address not found on this netif
|
|
*/
|
|
s8_t
|
|
netif_get_ip6_addr_match(struct netif *netif, const ip6_addr_t *ip6addr)
|
|
{
|
|
s8_t i;
|
|
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
|
|
if (!ip6_addr_isinvalid(netif_ip6_addr_state(netif, i)) &&
|
|
ip6_addr_cmp(netif_ip6_addr(netif, i), ip6addr)) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/** Create a link-local IPv6 address on a netif (stored in slot 0)
|
|
*
|
|
* @param netif the netif to create the address on
|
|
* @param from_mac_48bit if != 0, assume hwadr is a 48-bit MAC address (std conversion)
|
|
* if == 0, use hwaddr directly as interface ID
|
|
*/
|
|
void
|
|
netif_create_ip6_linklocal_address(struct netif *netif, u8_t from_mac_48bit)
|
|
{
|
|
u8_t i, addr_index;
|
|
|
|
/* Link-local prefix. */
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[0] = PP_HTONL(0xfe800000ul);
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[1] = 0;
|
|
|
|
/* Generate interface ID. */
|
|
if (from_mac_48bit) {
|
|
/* Assume hwaddr is a 48-bit IEEE 802 MAC. Convert to EUI-64 address. Complement Group bit. */
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[2] = htonl((((u32_t)(netif->hwaddr[0] ^ 0x02)) << 24) |
|
|
((u32_t)(netif->hwaddr[1]) << 16) |
|
|
((u32_t)(netif->hwaddr[2]) << 8) |
|
|
(0xff));
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[3] = htonl((0xfeul << 24) |
|
|
((u32_t)(netif->hwaddr[3]) << 16) |
|
|
((u32_t)(netif->hwaddr[4]) << 8) |
|
|
(netif->hwaddr[5]));
|
|
} else {
|
|
/* Use hwaddr directly as interface ID. */
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[2] = 0;
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[3] = 0;
|
|
|
|
addr_index = 3;
|
|
for (i = 0; (i < 8) && (i < netif->hwaddr_len); i++) {
|
|
if (i == 4) {
|
|
addr_index--;
|
|
}
|
|
ip_2_ip6(&netif->ip6_addr[0])->addr[addr_index] |= ((u32_t)(netif->hwaddr[netif->hwaddr_len - i - 1])) << (8 * (i & 0x03));
|
|
}
|
|
}
|
|
|
|
#ifdef LWIP_ESP8266
|
|
ip6_addr_set( ip_2_ip6(&netif->link_local_addr), ip_2_ip6(&netif->ip6_addr[0]) );
|
|
#endif
|
|
|
|
/* Set address state. */
|
|
#if LWIP_IPV6_DUP_DETECT_ATTEMPTS
|
|
/* Will perform duplicate address detection (DAD). */
|
|
netif->ip6_addr_state[0] = IP6_ADDR_TENTATIVE;
|
|
#else
|
|
/* Consider address valid. */
|
|
netif->ip6_addr_state[0] = IP6_ADDR_PREFERRED;
|
|
#endif /* LWIP_IPV6_AUTOCONFIG */
|
|
}
|
|
|
|
/** This function allows for the easy addition of a new IPv6 address to an interface.
|
|
* It takes care of finding an empty slot and then sets the address tentative
|
|
* (to make sure that all the subsequent processing happens).
|
|
*
|
|
* @param netif netif to add the address on
|
|
* @param ip6addr address to add
|
|
* @param chosen_idx if != NULL, the chosen IPv6 address index will be stored here
|
|
*/
|
|
err_t
|
|
netif_add_ip6_address(struct netif *netif, const ip6_addr_t *ip6addr, s8_t *chosen_idx)
|
|
{
|
|
s8_t i;
|
|
|
|
i = netif_get_ip6_addr_match(netif, ip6addr);
|
|
if (i >= 0) {
|
|
/* Address already added */
|
|
if (chosen_idx != NULL) {
|
|
*chosen_idx = i;
|
|
}
|
|
return ERR_OK;
|
|
}
|
|
|
|
/* Find a free slot -- musn't be the first one (reserved for link local) */
|
|
for (i = 1; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
|
|
if (!ip6_addr_isvalid(netif->ip6_addr_state[i])) {
|
|
ip_addr_copy_from_ip6(netif->ip6_addr[i], *ip6addr);
|
|
netif_ip6_addr_set_state(netif, i, IP6_ADDR_TENTATIVE);
|
|
if (chosen_idx != NULL) {
|
|
*chosen_idx = i;
|
|
}
|
|
return ERR_OK;
|
|
}
|
|
}
|
|
|
|
if (chosen_idx != NULL) {
|
|
*chosen_idx = -1;
|
|
}
|
|
return ERR_VAL;
|
|
}
|
|
|
|
|
|
#ifdef LWIP_ESP8266
|
|
void
|
|
netif_create_ip4_linklocal_address(struct netif * netif)
|
|
{
|
|
#if 1
|
|
ip_addr_t linklocal;
|
|
ip_addr_t linklocal_mask;
|
|
ip4_addr_t addr = {0};
|
|
/* Link-local prefix and mask. */
|
|
IP4_ADDR(ip_2_ip4(&linklocal), 169, 254, 0, 0);
|
|
IP4_ADDR(ip_2_ip4(&linklocal_mask), 255, 255, 0, 0);
|
|
|
|
if (!ip4_addr_netcmp( ip_2_ip4(&linklocal), ip_2_ip4(&netif->link_local_addr), ip_2_ip4(&linklocal_mask) ) &&
|
|
!ip4_addr_isany(ip_2_ip4(&netif->ip_addr)) ) {
|
|
IP4_ADDR( ip_2_ip4(&netif->link_local_addr), 169, 254, ip4_addr3( ip_2_ip4(&netif->ip_addr) )
|
|
, ip4_addr4( ip_2_ip4(&netif->ip_addr) ) );
|
|
return;
|
|
}
|
|
|
|
while ( !(addr.addr) || !ip4_addr4(&addr) )
|
|
//os_get_random((unsigned char *)&addr, sizeof(addr));
|
|
addr.addr = LWIP_RAND();
|
|
|
|
|
|
if ( ip_2_ip4(&netif->netmask)->addr > IP_CLASSB_NET &&
|
|
!ip4_addr_isany( ip_2_ip4(&netif->ip_addr) )) { // random host address
|
|
IP4_ADDR( ip_2_ip4(&netif->link_local_addr), 169, 254, ip4_addr3( ip_2_ip4(&netif->ip_addr))
|
|
, ip4_addr4(&addr));
|
|
} else {
|
|
IP4_ADDR( ip_2_ip4(&netif->link_local_addr), 169, 254, ip4_addr3(&addr), ip4_addr4(&addr) );
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
/** Dummy IPv6 output function for netifs not supporting IPv6
|
|
*/
|
|
static err_t
|
|
netif_null_output_ip6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipaddr)
|
|
{
|
|
LWIP_UNUSED_ARG(netif);
|
|
LWIP_UNUSED_ARG(p);
|
|
LWIP_UNUSED_ARG(ipaddr);
|
|
|
|
return ERR_IF;
|
|
}
|
|
#endif /* LWIP_IPV6 */
|