definition.h

sniffer program for serial

#ifndef _DEFINITION__H__
#define _DEFINITION__H__


typedef	unsigned int tcp_seq;
/*
* TCP header
*/
struct tcphdr {
	unsigned short	th_sport;		/* source port */
	unsigned short	th_dport;		/* destination port */
	tcp_seq	th_seq;			/* sequence number */
	tcp_seq	th_ack;			/* acknowledgement number */

	unsigned char	th_off:4,		/* data offset */
					th_x2:4;		/* (unused) */

	unsigned char	th_flags;

	unsigned short	th_win;			/* window */
	unsigned short	th_sum;			/* checksum */
	unsigned short	th_urp;			/* urgent pointer */
};

#define	TH_FIN	0x01
#define	TH_SYN	0x02
#define	TH_RST	0x04
#define	TH_PUSH	0x08
#define	TH_ACK	0x10
#define	TH_URG	0x20
#define TH_NETDEV        0x00000001
#define TH_TAPI          0x00000002

//
// Size defines
//
#define MAX_IP_SIZE        65535
#define MIN_IP_HDR_SIZE       20

//
// Macros to extract the high and low order 4-bits from a byte
//
#define HI_BYTE(byte)    (((byte) >> 4) & 0x0F)
#define LO_BYTE(byte)    ((byte) & 0x0F)

//
// Used to indicate to parser what fields to filter on
//
#define FILTER_MASK_SOURCE_ADDRESS      0x01
#define FILTER_MASK_SOURCE_PORT         0x02
#define FILTER_MASK_DESTINATION_ADDRESS 0x04
#define FILTER_MASK_DESTINATION_PORT    0x08



#endif