#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pcap.h>
#define MAXBYTES2CAPTURE 2048
void ProcessPacket(u_char *arg, const struct pcap_pkthdr *pkthdr, const u_char *packet)
{
int i = 0, *counter = (int *)arg;
printf("Packet Count : %d/n", ++(*counter));
printf("Received Packet Size: %d/n", pkthdr->len);
printf("Payload:/n");
for (i=0; i<pkthdr->len; i++)
{
printf("%02x ", (unsigned int)packet[i]);
if ( (i%16 = = 15 && i != 0) || (i = = pkthdr->len -1))
{
printf("/n");
}
}
printf("/n/n************************************************/n");
return;
}
int main(int argc, char *argv[])
{
int i = 0, count = 0;
pcap_t *descr = NULL;
char errbuf[PCAP_ERRBUF_SIZE], *device = NULL;
bpf_u_int32 netaddr = 0, mask = 0;
struct bpf_program filter;
memset(errbuf, 0, sizeof(errbuf));
if (argc != 2)
{
device = pcap_lookupdev(errbuf);
}
else
{
device = argv[1];
}
printf("Try to open device %s/n", device);
if((descr = pcap_open_live(device, MAXBYTES2CAPTURE, 1, 0, errbuf)) = =NULL)
{
printf("error : %s/n", errbuf);
exit(-1);
}
pcap_lookupnet(device, &netaddr, &mask, errbuf);
if (pcap_compile(descr, &filter, "arp and ether host 00:0c:29:b7:f6:33",0, mask) < 0)
{
printf("pcap_compile error/n");
exit(-1);
}
pcap_setfilter(descr, &filter);
pcap_loop(descr, 3, ProcessPacket, (u_char *)&count);
return 0;
}