#define BUFFERSIZE 65535

/*
* workhorse function, we will be modifying this function 
*/
void my_callback(u_char *args,const struct pcap_pkthdr* pkthdr,const u_char* packet)
{
// nothing there yet !
}



 void MyThread::run()
 {
	char *dev; 
	char errbuf[PCAP_ERRBUF_SIZE];
	pcap_t* descr;
	struct bpf_program fp;      /* hold compiled program     */
	bpf_u_int32 maskp;          /* subnet mask               */
	bpf_u_int32 netp;           /* ip                        */
	u_char* args = NULL;


	/* grab a device to peak into... */
	dev = pcap_lookupdev(errbuf);
	if(dev == NULL)
	{ printf("%s\n",errbuf); exit(1); }

	/* ask pcap for the network address and mask of the device */
	pcap_lookupnet(dev,&netp,&maskp,errbuf);

	/* open device for reading. NOTE: defaulting to
	* promiscuous mode*/
	descr = pcap_open_live(dev,BUFFERSIZE,1,-1,errbuf);
	if(descr == NULL)
	{ printf("pcap_open_live(): %s\n",errbuf); exit(1); }



	/* Lets try and compile the program.. non-optimized */
	if(pcap_compile(descr,&fp,"port 80",0,netp) == -1)
	{ fprintf(stderr,"Error calling pcap_compile\n"); exit(1); }

	/* set the compiled program as the filter */
	if(pcap_setfilter(descr,&fp) == -1)
	{ fprintf(stderr,"Error setting filter\n"); exit(1); }


	/* ... and loop */ 
	pcap_loop(descr,-1,my_callback,args);

	fprintf(stdout,"\nfinished\n");
 }