Compile problem

[danathane]

Hello!!

I have a problem compiling my program.
It has warnings, and it doesn't make any link for pcap_open_offline and other pcap function. I have no lib missing error or other. So I d'ont understand.

complie command : gcc file.c
Here is my code :

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <pcap.h>
#include <pcap-bpf.h>

#include <netinet/in.h>
#include <net/ethernet.h>
#include <netinet/ether.h>
#include <netinet/ip.h>


int main(int argn, char **argv)
{

	pcap_t *desc;
	const u_char *packet_1;
	const u_char *packet_2;
	struct pcap_pkthdr hdr;
	char errbuf[PCAP_ERRBUF_SIZE];
	struct bpf_program bp ;
	char * buff =NULL;
	struct ethhdr *EtherHdr_1;
	struct ethhdr *EtherHdr_2;
	bpf_u_int32 netmask=32;
	
	
	
	FILE *fp=fopen("./fichier/adresses_ip_mac.htm","w");
	
	
	if(fp==NULL)
		printf("Ouverture de fichier impossible\n");
	
	desc = pcap_open_offline("./fichier/fichiertest.pcap", errbuf);
	
	if (desc == NULL)
		printf("pcap_open_offline: %s\n", errbuf), exit(2);
	
	packet_1 = pcap_next(desc,&hdr);
	EtherHdr_1 = (struct etherhdr *)packet_1;
	
	packet_2 = packet_1;
	EtherHdr_2 = (struct etherhdr *)packet_2;
	
	while (EtherHdr_1->h_source == EtherHdr_2->h_source && (packet_2=pcap_next(desc,&hdr)))
	{
		EtherHdr_2 = (struct etherhdr *)packet_2;
	} 
	
	printf("Adresse Mac 1 :%s\n", ether_ntoa((struct ether_addr *)EtherHdr_1->h_dest));
	fclose(fp);
	pcap_close(desc);
	
	
	system ("pause");
	

}

Solution : gcc file.c -o file -lpcap


If you have ideas. I take it.

[luckyr13]

If u can tell me what are the compile problems (what kind of warnings do u have?) that u have maybe i could help a little more ... actually u post after your code:

Solution : gcc file.c -o file -lpcap

This means that you already find a solution? what do you want the programs do? ... i suggest the next links anyway... maybe could help:

http://www.tcpdump.org/pcap.htm
http://www.geocities.com/amit_saha_w...tml/sniff.html
http://linux.drivein-jim.net/128/saha.html
http://www.deepthought.org/~ngallahe.../section1.html