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

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)tcp.h	7.7 (Berkeley) 6/28/90
 *	$Id: tcp.h,v 1.2 1993/10/16 18:26:20 rgrimes Exp $
 */

#ifndef _NETINET_TCP_H_
#define _NETINET_TCP_H_ 1

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 */
#if BYTE_ORDER == LITTLE_ENDIAN 
	u_char	th_x2:4,		/* (unused) */
		th_off:4;		/* data offset */
#endif
#if BYTE_ORDER == BIG_ENDIAN 
	u_char	th_off:4,		/* data offset */
		th_x2:4;		/* (unused) */
#endif
	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 */
};

#define	TCPOPT_EOL	0
#define	TCPOPT_NOP	1
#define	TCPOPT_MAXSEG	2

/*
 * Default maximum segment size for TCP.
 * With an IP MSS of 576, this is 536,
 * but 512 is probably more convenient.
 * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
 */
#define	TCP_MSS	512

#define	TCP_MAXWIN	65535		/* largest value for window */

/*
 * User-settable options (used with setsockopt).
 */
#define	TCP_NODELAY	0x01	/* don't delay send to coalesce packets */
#define	TCP_MAXSEG	0x02	/* set maximum segment size */
#endif /* _NETINET_TCP_H_ */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1986 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
38e82238	33	* from: @(#)tcp.h 7.7 (Berkeley) 6/28/90
8ace4366	34	* $Id: tcp.h,v 1.2 1993/10/16 18:26:20 rgrimes Exp $
15637ed4 RG	35	*/
15637ed4 RG	36
8ace4366 GW	37	#ifndef _NETINET_TCP_H_
	38	#define _NETINET_TCP_H_ 1
	39
15637ed4 RG	40	typedef u_long tcp_seq;
	41	/*
	42	* TCP header.
	43	* Per RFC 793, September, 1981.
	44	*/
	45	struct tcphdr {
	46	u_short th_sport; /* source port */
	47	u_short th_dport; /* destination port */
	48	tcp_seq th_seq; /* sequence number */
	49	tcp_seq th_ack; /* acknowledgement number */
	50	#if BYTE_ORDER == LITTLE_ENDIAN
	51	u_char th_x2:4, /* (unused) */
	52	th_off:4; /* data offset */
	53	#endif
	54	#if BYTE_ORDER == BIG_ENDIAN
	55	u_char th_off:4, /* data offset */
	56	th_x2:4; /* (unused) */
	57	#endif
	58	u_char th_flags;
	59	#define TH_FIN 0x01
	60	#define TH_SYN 0x02
	61	#define TH_RST 0x04
	62	#define TH_PUSH 0x08
	63	#define TH_ACK 0x10
	64	#define TH_URG 0x20
	65	u_short th_win; /* window */
	66	u_short th_sum; /* checksum */
	67	u_short th_urp; /* urgent pointer */
	68	};
	69
	70	#define TCPOPT_EOL 0
	71	#define TCPOPT_NOP 1
	72	#define TCPOPT_MAXSEG 2
	73
	74	/*
	75	* Default maximum segment size for TCP.
	76	* With an IP MSS of 576, this is 536,
	77	* but 512 is probably more convenient.
	78	* This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
	79	*/
	80	#define TCP_MSS 512
	81
	82	#define TCP_MAXWIN 65535 /* largest value for window */
	83
	84	/*
	85	* User-settable options (used with setsockopt).
	86	*/
	87	#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
	88	#define TCP_MAXSEG 0x02 /* set maximum segment size */
8ace4366	89	#endif /* _NETINET_TCP_H_ */