[thirdparty/glibc.git] / sysdeps / generic / netinet / tcp.h

/*
 * Copyright (c) 1982, 1986, 1993
 *	The 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.
 *
 *	@(#)tcp.h	8.1 (Berkeley) 6/10/93
 */

#ifndef _NETINET_TCP_H

#define _NETINET_TCP_H	1
#include <sys/cdefs.h>


__BEGIN_DECLS

typedef	unsigned int	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
#define    TCPOLEN_MAXSEG		4
#define TCPOPT_WINDOW		3
#define    TCPOLEN_WINDOW		3
#define TCPOPT_SACK_PERMITTED	4		/* Experimental */
#define    TCPOLEN_SACK_PERMITTED	2
#define TCPOPT_SACK		5		/* Experimental */
#define TCPOPT_TIMESTAMP	8
#define    TCPOLEN_TIMESTAMP		10
#define    TCPOLEN_TSTAMP_APPA		(TCPOLEN_TIMESTAMP+2) /* appendix A */

#define TCPOPT_TSTAMP_HDR	\
    (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)

/*
 * 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 (unscaled) window */

#define TCP_MAX_WINSHIFT	14	/* maximum window shift */

/*
 * 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 */

#define SOL_TCP		6	/* TCP level */

__END_DECLS

#endif /* netinet/tcp.h */
Commit	Line	Data
5dedb801 RM	1	/*
	2	* Copyright (c) 1982, 1986, 1993
	3	* The Regents of the University of California. 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	*
	33	* @(#)tcp.h 8.1 (Berkeley) 6/10/93
	34	*/
	35
bdf289b2 UD	36	#ifndef _NETINET_TCP_H
	37
	38	#define _NETINET_TCP_H 1
	39	#include <sys/cdefs.h>
	40
	41
	42	__BEGIN_DECLS
	43
c224a18a	44	typedef unsigned int tcp_seq;
5dedb801 RM	45	/*
	46	* TCP header.
	47	* Per RFC 793, September, 1981.
	48	*/
	49	struct tcphdr {
	50	u_short th_sport; /* source port */
	51	u_short th_dport; /* destination port */
	52	tcp_seq th_seq; /* sequence number */
	53	tcp_seq th_ack; /* acknowledgement number */
afd4eb37	54	#if __BYTE_ORDER == __LITTLE_ENDIAN
5dedb801 RM	55	u_char th_x2:4, /* (unused) */
	56	th_off:4; /* data offset */
	57	#endif
afd4eb37	58	#if __BYTE_ORDER == __BIG_ENDIAN
5dedb801 RM	59	u_char th_off:4, /* data offset */
	60	th_x2:4; /* (unused) */
	61	#endif
	62	u_char th_flags;
	63	#define TH_FIN 0x01
	64	#define TH_SYN 0x02
	65	#define TH_RST 0x04
	66	#define TH_PUSH 0x08
	67	#define TH_ACK 0x10
	68	#define TH_URG 0x20
	69	u_short th_win; /* window */
	70	u_short th_sum; /* checksum */
	71	u_short th_urp; /* urgent pointer */
	72	};
	73
	74	#define TCPOPT_EOL 0
	75	#define TCPOPT_NOP 1
	76	#define TCPOPT_MAXSEG 2
	77	#define TCPOLEN_MAXSEG 4
	78	#define TCPOPT_WINDOW 3
	79	#define TCPOLEN_WINDOW 3
	80	#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
	81	#define TCPOLEN_SACK_PERMITTED 2
	82	#define TCPOPT_SACK 5 /* Experimental */
	83	#define TCPOPT_TIMESTAMP 8
	84	#define TCPOLEN_TIMESTAMP 10
	85	#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
	86
	87	#define TCPOPT_TSTAMP_HDR \
	88	(TCPOPT_NOP<<24\|TCPOPT_NOP<<16\|TCPOPT_TIMESTAMP<<8\|TCPOLEN_TIMESTAMP)
	89
	90	/*
	91	* Default maximum segment size for TCP.
	92	* With an IP MSS of 576, this is 536,
	93	* but 512 is probably more convenient.
	94	* This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
	95	*/
	96	#define TCP_MSS 512
	97
	98	#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
	99
	100	#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
	101
	102	/*
	103	* User-settable options (used with setsockopt).
	104	*/
	105	#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
	106	#define TCP_MAXSEG 0x02 /* set maximum segment size */
bdf289b2 UD	107
	108	#define SOL_TCP 6 /* TCP level */
	109
	110	__END_DECLS
	111
	112	#endif /* netinet/tcp.h */