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test_packet.c
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test_packet.c
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/*
* =====================================================================================
* Copyright (c), 2013-2020, xxx.
* Filename: test_packet.c
*
* Description:
* Others:
*
* Version: 1.0
* Created: 09/25/2018 10:48:09 AM
* Revision: none
* Compiler: gcc
*
* Author: Joy. Hou (hwt), 544088192@qq.com
* Organization: xxx
*
* =====================================================================================
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <netinet/if_ether.h> /* For ETH_P_ALL */
#include <net/if_arp.h>
#include <net/if.h>
#include <netinet/ether.h>
#include <linux/sockios.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <netpacket/packet.h>
#define BUFSIZE 2048
static void hex_print(const u_char *buf, int len, int offset)
{
u_int i, j, jm;
int c;
printf("\n");
for (i = 0; i < len; i += 0x10) {
printf(" %04x: ", (u_int)(i + offset));
jm = len - i;
jm = jm > 16 ? 16 : jm;
for (j = 0; j < jm; j++) {
if ((j % 2) == 1)
printf("%02x ", (u_int) buf[i+j]);
else printf("%02x", (u_int) buf[i+j]);
}
for (; j < 16; j++) {
if ((j % 2) == 1) printf(" ");
else printf(" ");
}
printf(" ");
for (j = 0; j < jm; j++) {
c = buf[i+j];
c = isprint(c) ? c : '.';
printf("%c", c);
}
printf("\n");
}
}
int main()
{
int listenfd;
int n = 0;
unsigned char buf[BUFSIZE];
struct ifreq ifr;
int i = 0;
struct sockaddr_ll fromaddr;
unsigned char src_mac[ETH_ALEN]={0};
socklen_t len = sizeof(fromaddr);
int ifidx = 0;
if ((listenfd = socket(
// AF_INET,
PF_PACKET,
// SOCK_STREAM,
SOCK_RAW,
// htons(ETH_P_IP)))
// htons(ETH_P_ARP)))
htons(ETH_P_ALL)))
// 0))
< 0)
{
perror("socket");
exit(1);
}
bzero(&fromaddr, sizeof(fromaddr));
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, "tap0", sizeof("tap0"));
if (ioctl(listenfd, SIOCGIFINDEX, &ifr) != 0)
{
perror("ioctl(SIOCGIFINDEX)");
return -1;
}
ifidx = ifr.ifr_ifindex;
if(ioctl(listenfd, SIOCGIFHWADDR,&ifr) < 0){
perror("get dev MAC addr error:");
exit(1);
}
memcpy(src_mac, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
printf("MAC :%02X-%02X-%02X-%02X-%02X-%02X\n",src_mac[0],src_mac[1],src_mac[2],src_mac[3],src_mac[4],src_mac[5]);
printf("interface Index:%d\n",ifidx);
fromaddr.sll_ifindex = ifidx;
fromaddr.sll_family = PF_PACKET;
fromaddr.sll_protocol=htons(ETH_P_ALL);//ETH_P_ALL);
// fromaddr.sll_hatype=ARPHRD_ETHER;
// fromaddr.sll_halen=ETH_ALEN;
// fromaddr.sll_pkttype=PACKET_HOST;
// memcpy(fromaddr.sll_addr, src_mac, ETH_ALEN);
// struct sockaddr_in xx;
// bzero(&xx, sizeof(xx));
// xx.sin_family = AF_INET;
// xx.sin_addr.s_addr =htonl(INADDR_ANY);
// xx.sin_port = htons(9999);
int ret = bind(listenfd, (struct sockaddr*)&fromaddr, sizeof(fromaddr));
if (ret < 0)
{
perror("bind err");
return -3;
}
ifr.ifr_flags &= ~IFF_PROMISC;
printf("name %s\n", ifr.ifr_name);
if (ioctl(listenfd, SIOCSIFFLAGS, &ifr) < 0)
{
perror("set flag");
return -2;
}
for (;;) {
unsigned char src_mac[18] = "";
unsigned char dst_mac[18] = "";
#if 0
n = recvfrom(listenfd, buf, sizeof(buf), 0, (struct sockaddr *)&fromaddr, &len);
#else
n = recv(listenfd, buf, BUFSIZE, 0);
#endif
if (n > 0)
{
sprintf(dst_mac,"%02x:%02x:%02x:%02x:%02x:%02x", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
sprintf(src_mac,"%02x:%02x:%02x:%02x:%02x:%02x", buf[6], buf[7], buf[8], buf[9], buf[10], buf[11]);
printf("recv [%d] type[0x%x][0x%x]\n", n, buf[12], buf[13]);
//判断是否为IP数据包
if(buf[12]==0x08 && buf[13]==0x00)
{
printf("______________IP数据报_______________\n");
printf("MAC:%s >> %s\n",src_mac,dst_mac);
}//判断是否为ARP数据包
else if(buf[12]==0x08 && buf[13]==0x06)
{
printf("______________ARP数据报_______________\n");
printf("MAC:%s >> %s\n",src_mac,dst_mac);
}//判断是否为RARP数据包
else if(buf[12]==0x80 && buf[13]==0x35)
{
printf("______________RARP数据报_______________\n");
printf("MAC:%s>>%s\n",src_mac,dst_mac);
}
// for (i=0; i<n; i++)
// {
// printf("0x%X ", buf[i]);
// }
// printf("\n");
// hex_print(buf, n, 0);
//decode_eth(buf);
}
}
return 0;
}