[unix-history] / usr / src / sys / netinet / tcp.h

/* tcp.h 1.19 81/11/26 */

typedef	u_long	tcp_seq;
/*
 * TCP header.
 * Per RFC 793, September, 1981.
 */
struct tcphdr {
	u_short	th_sport;		/* source port */
	u_short	th_dport;		/* destination port */
	tcp_seq	th_seq;			/* sequence number */
	tcp_seq	th_ack;			/* acknowledgement number */
	u_char
		th_x2:4,		/* (unused) */
		th_off:4;		/* data offset */
	u_char	th_flags;
#define	TH_FIN	0x01
#define	TH_SYN	0x02
#define	TH_RST	0x04
#define	TH_PUSH	0x08
#define	TH_ACK	0x10
#define	TH_URG	0x20
	u_short	th_win;			/* window */
	u_short	th_sum;			/* checksum */
	u_short	th_urp;			/* urgent pointer */
};
Commit	Line	Data
8a13b737	1	/* tcp.h 1.19 81/11/26 */
6e8b2eca	2
8a13b737	3	typedef u_long tcp_seq;
6e8b2eca	4	/*
eb44bfb2	5	* TCP header.
2b4b57cd	6	* Per RFC 793, September, 1981.
6e8b2eca	7	*/
eb44bfb2 BJ	8	struct tcphdr {
	9	u_short th_sport; /* source port */
	10	u_short th_dport; /* destination port */
8a13b737 BJ	11	tcp_seq th_seq; /* sequence number */
8a13b737 BJ	12	tcp_seq th_ack; /* acknowledgement number */
6e8b2eca	13	u_char
eb44bfb2 BJ	14	th_x2:4, /* (unused) */
eb44bfb2 BJ	15	th_off:4; /* data offset */
a3d78bbd	16	u_char th_flags;
2ff61f9d BJ	17	#define TH_FIN 0x01
	18	#define TH_SYN 0x02
	19	#define TH_RST 0x04
	20	#define TH_PUSH 0x08
	21	#define TH_ACK 0x10
	22	#define TH_URG 0x20
eb44bfb2 BJ	23	u_short th_win; /* window */
	24	u_short th_sum; /* checksum */
	25	u_short th_urp; /* urgent pointer */
121f5f3a	26	};