#include <pcap.h>
	 #include <stdio.h>

	 int main(int argc, char *argv[])
	 {
		pcap_t *handle;			/* Session handle */
		char *dev;			/* The device to sniff on */
		char errbuf[PCAP_ERRBUF_SIZE];	/* Error string */
		struct bpf_program fp;		/* The compiled filter */
		char filter_exp[] = "port 80";	/* The filter expression */
		bpf_u_int32 mask;		/* Our netmask */
		bpf_u_int32 net;		/* Our IP */
		struct pcap_pkthdr header;	/* The header that pcap gives us */
		const u_char *packet;		/* The actual packet */

		/* Define the device */
		//dev = pcap_lookupdev(errbuf);
		dev = "wlan0";
		if (dev == NULL) {
			fprintf(stderr, "Couldn't find default device: %s\n", errbuf);
			return(2);
		}
		/* Find the properties for the device */
		if (pcap_lookupnet(dev, &net, &mask, errbuf) == -1) {
			fprintf(stderr, "Couldn't get netmask for device %s: %s\n", dev, errbuf);
			net = 0;
			mask = 0;
		}
		/* Open the session in promiscuous mode */
		printf("BUFSIZ is [%d]\n", BUFSIZ);
		handle = pcap_open_live(dev, BUFSIZ, 1, 1000, errbuf);
		if (handle == NULL) {
			fprintf(stderr, "Couldn't open device %s: %s\n", dev, errbuf);
			return(2);
		}
		/* Compile and apply the filter */
		/*if (pcap_compile(handle, &fp, filter_exp, 0, net) == -1) {
			fprintf(stderr, "Couldn't parse filter %s: %s\n", filter_exp, pcap_geterr(handle));
			return(2);
		}
		if (pcap_setfilter(handle, &fp) == -1) {
			fprintf(stderr, "Couldn't install filter %s: %s\n", filter_exp, pcap_geterr(handle));
			return(2);
		}*/
		/* Grab a packet */
		packet = pcap_next(handle, &header);
		/* Print its length */
		printf("Jacked a packet with length of [%d]\n", header.len);
		/* And close the session */
		pcap_close(handle);
		return(0);
	 }