#include <stdio.h>
#include <linux/netfilter.h>
#include <libipq.h>
#include <linux/ip.h>
#include <linux/tcp.h>



#define BUFSIZE 2048

static void die(struct ipq_handle *h)
{
	ipq_perror("passer");
	ipq_destroy_handle(h);
	exit(1);
}


int main(int argc, char **argv)
{
	int status;
	unsigned char buf[BUFSIZE];


	struct ipq_handle *h;
	h = ipq_create_handle(0,PF_INET);
	if (!h)
		die(h);


	status = ipq_set_mode(h,IPQ_COPY_PACKET,BUFSIZE);
	if (status < 0)
		die(h);

	while (1) {
		status = ipq_read(h,buf,BUFSIZE,0);
		if (status < 0)
			die(h);

		switch(ipq_message_type(buf)) {
			case NLMSG_ERROR:
				fprintf(stderr,"Recieved Error Message: %d\n",ipq_get_msgerr(buf));
				break;

			case IPQM_PACKET: {
				struct ipq_packet_msg_t *m = ipq_get_packet(buf);
				struct iphdr *ip = (struct iphdr*) m->payload; /*this line give the error*/
				fprintf(stdout,"Saddr: %d\nDaddr: %d\n",ip->saddr,ip->daddr);

				
				status = ipq_set_verdict(h,m->packet_id,NF_ACCEPT,0,NULL); /*this line also borks*/
				if (status < 0)
					die(h);

				break;

				}

			default:
				fprintf(stderr,"Unknown Message Type!\n");
		}

	}

	ipq_destroy_handle(h);
	return 0;
}