#include <netinet/if_ether.h>
#include <stdlib.h>
#include <pcap.h>
#include <errno.h>
#include <stdio.h>
#include<netinet/ip.h>
#include<netinet/tcp.h>
#include<string.h>
#define MAXBYTES2CAPTURE 2048
pcap_dumper_t *dump;
void setfilter(pcap_t * capture, char filter_app[]);
void dump_offline(pcap_t * capture, char *filename);
void view_offline(char *filename);
int a[3] = { 0, 0, 0 };
int seq;


struct http_stat {
    int connection;
    int packets;
} httpstatus;
struct http_request {
    char response;
    int packets1;
} httprequest;

struct http_response
{
 int packets;
 int response_code;

}httpresponse;


void process_pkt(u_char * str, const struct pcap_pkthdr *pkthdr,
		 const u_char * packet)
{   
    int dst=8080;
    int in, pos = 0, pos1 = 0;
    static int cnt;
    u_char *ptr;
    struct ether_header *eptr;
    struct ip *iphdr;
    struct tcphdr *tcp;
    static int count = 1, i;
    
    httprequest.packets1 = 0;
     
    printf("Call back:");
    fprintf(stdout, "%d,\n", count);
    count++;
    //Here i have code for printing ethernet header and IP address

    iphdr = (struct ip *) (packet + sizeof(struct ether_header));

    if (iphdr->ip_p == IPPROTO_TCP) {
	tcp =(struct tcphdr *) (packet + sizeof(struct ether_header) + sizeof(struct ip));
	packet =(const char *) (packet + sizeof(struct ether_header) + sizeof(struct ip) + sizeof(struct tcphdr));
	
	if (tcp->syn && tcp->ack)
	    a[1] = 1;
	else if (tcp->syn)
	    a[0] = 1;
	else if (tcp->ack)
	    a[2] = 1;
       

    }
    if (a[0] == 1 && a[1] == 1 && a[2] == 1) {
	cnt++;
	if (cnt == 1) {
	    httpstatus.connection = 1;
	    printf("connection established\n");
	}
	httpstatus.connection = 0;
    }
   
 if((tcp->source)==dst && !(tcp->psh))    // This is to find REsponse packet
        {
          
        seq=tcp->seq;             
/* I want to compare previous packet's seq number and current packets ack num. How should i do this. With too many structures and variables i struggle to manipulate.. Please help!! */
         
	 if(seq==tcp->ack_seq)
         printf("ACK is equals to SEQ");
          }
 	for (i=0;i<pkthdr->len; i++)
        printf("%c", packet[i]);
        
   	printf("\n");
    
  

}