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Import lwIP contrib rep
... from http://git.savannah.gnu.org/cgit/lwip/lwip-contrib.git/ into contrib/ subdir, STABLE-2_1_0_RELEASE tag lwIP contrib is now officially frozen TODO: Fix build
This commit is contained in:
Dirk Ziegelmeier
207
contrib/ports/unix/port/netif/pcapif.c
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207
contrib/ports/unix/port/netif/pcapif.c
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/*
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* Copyright (c) 2001-2003 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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#ifndef linux /* Apparently, this doesn't work under Linux. */
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#include "lwip/debug.h"
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <pcap.h>
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#include "netif/etharp.h"
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#include "lwip/stats.h"
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#include "lwip/def.h"
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#include "lwip/mem.h"
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#include "lwip/pbuf.h"
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#include "lwip/sys.h"
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#include "lwip/ip.h"
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struct pcapif {
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pcap_t *pd;
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sys_sem_t sem;
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u8_t pkt[2048];
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u32_t len;
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u32_t lasttime;
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struct pbuf *p;
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struct eth_addr *ethaddr;
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};
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static char errbuf[PCAP_ERRBUF_SIZE];
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/*-----------------------------------------------------------------------------------*/
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static err_t
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pcapif_output(struct netif *netif, struct pbuf *p,
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ip_addr_t *ipaddr)
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{
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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timeout(void *arg)
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{
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struct netif *netif;
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struct pcapif *pcapif;
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struct pbuf *p;
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struct eth_hdr *ethhdr;
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netif = (struct netif *)arg;
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pcapif = netif->state;
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ethhdr = (struct eth_hdr *)pcapif->pkt;
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if (lwip_htons(ethhdr->type) != ETHTYPE_IP ||
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ip_lookup(pcapif->pkt + 14, netif)) {
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/* We allocate a pbuf chain of pbufs from the pool. */
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p = pbuf_alloc(PBUF_LINK, pcapif->len, PBUF_POOL);
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if (p != NULL) {
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pbuf_take(p, pcapif->pkt, pcapif->len);
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ethhdr = p->payload;
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switch (lwip_htons(ethhdr->type)) {
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/* IP or ARP packet? */
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case ETHTYPE_IP:
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case ETHTYPE_ARP:
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#if PPPOE_SUPPORT
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/* PPPoE packet? */
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case ETHTYPE_PPPOEDISC:
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case ETHTYPE_PPPOE:
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#endif /* PPPOE_SUPPORT */
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/* full packet send to tcpip_thread to process */
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if (netif->input(p, netif) != ERR_OK) {
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LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
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pbuf_free(p);
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p = NULL;
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}
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break;
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default:
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pbuf_free(p);
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break;
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}
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}
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} else {
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printf("ip_lookup dropped\n");
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}
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sys_sem_signal(&pcapif->sem);
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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callback(u_char *arg, const struct pcap_pkthdr *hdr, const u_char *pkt)
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{
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struct netif *netif;
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struct pcapif *pcapif;
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u32_t time, lasttime;
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netif = (struct netif *)arg;
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pcapif = netif->state;
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pcapif->len = hdr->len;
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bcopy(pkt, pcapif->pkt, hdr->len);
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time = hdr->ts.tv_sec * 1000 + hdr->ts.tv_usec / 1000;
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lasttime = pcapif->lasttime;
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pcapif->lasttime = time;
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if (lasttime == 0) {
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sys_timeout(1000, timeout, netif);
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} else {
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sys_timeout(time - lasttime, timeout, netif);
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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pcapif_thread(void *arg)
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{
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struct netif *netif;
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struct pcapif *pcapif;
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netif = arg;
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pcapif = netif->state;
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while (1) {
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pcap_loop(pcapif->pd, 1, callback, (u_char *)netif);
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sys_sem_wait(&pcapif->sem);
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if (pcapif->p != NULL) {
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netif->input(pcapif->p, netif);
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}
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}
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}
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/*-----------------------------------------------------------------------------------*/
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err_t
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pcapif_init(struct netif *netif)
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{
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struct pcapif *p;
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p = malloc(sizeof(struct pcapif));
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if (p == NULL)
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return ERR_MEM;
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netif->state = p;
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netif->name[0] = 'p';
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netif->name[1] = 'c';
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netif->output = pcapif_output;
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p->pd = pcap_open_offline("pcapdump", errbuf);
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if (p->pd == NULL) {
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printf("pcapif_init: failed %s\n", errbuf);
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return ERR_IF;
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}
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if(sys_sem_new(&p->sem, 0) != ERR_OK) {
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LWIP_ASSERT("Failed to create semaphore", 0);
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}
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p->p = NULL;
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p->lasttime = 0;
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sys_thread_new("pcapif_thread", pcapif_thread, netif, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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#endif /* linux */
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