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/* Sniffit Packet Discription File */
#include <sys/time.h>
struct packetheader
{
struct timeval ts; /* time stamp */
unsigned long caplen; /* length of portion present */
unsigned long len; /* length this packet (off wire) */
};
struct IP_header /* The IPheader (without options) */
{
unsigned char verlen, type;
unsigned short length, ID, flag_offset;
unsigned char TTL, protocol;
unsigned short checksum;
unsigned long int source, destination;
};
struct pseudo_IP_header
{
unsigned long int source, destination;
char zero_byte, protocol;
unsigned short TCP_UDP_len;
};
struct TCP_header /* The TCP header (without options) */
{
unsigned short source, destination;
unsigned long int seq_nr, ACK_nr;
unsigned short offset_flag, window, checksum, urgent;
};
struct ICMP_header /* The ICMP header */
{
unsigned char type, code;
unsigned short checksum;
};
struct UDP_header /* The UDP header */
{
unsigned short source, destination;
unsigned short length, checksum;
};
struct unwrap /* some extra info */
{
int IP_len, TCP_len, ICMP_len, UDP_len; /* header lengths */
int DATA_len;
};
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