[dragonfly.git] / contrib / tcpdump / tcp.h

/* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.11.2.1 2005/11/29 09:09:26 hannes Exp $ (LBL) */
/*
 * 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
 */

typedef	u_int32_t	tcp_seq;
/*
 * TCP header.
 * Per RFC 793, September, 1981.
 */
struct tcphdr {
	u_int16_t	th_sport;		/* source port */
	u_int16_t	th_dport;		/* destination port */
	tcp_seq		th_seq;			/* sequence number */
	tcp_seq		th_ack;			/* acknowledgement number */
	u_int8_t	th_offx2;		/* data offset, rsvd */
#define TH_OFF(th)	(((th)->th_offx2 & 0xf0) >> 4)
	u_int8_t	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
#define TH_ECNECHO	0x40	/* ECN Echo */
#define TH_CWR		0x80	/* ECN Cwnd Reduced */
	u_int16_t	th_win;			/* window */
	u_int16_t	th_sum;			/* checksum */
	u_int16_t	th_urp;			/* urgent pointer */
};

#define	TCPOPT_EOL		0
#define	TCPOPT_NOP		1
#define	TCPOPT_MAXSEG		2
#define    TCPOLEN_MAXSEG		4
#define	TCPOPT_WSCALE		3	/* window scale factor (rfc1323) */
#define	TCPOPT_SACKOK		4	/* selective ack ok (rfc2018) */
#define	TCPOPT_SACK		5	/* selective ack (rfc2018) */
#define	TCPOPT_ECHO		6	/* echo (rfc1072) */
#define	TCPOPT_ECHOREPLY	7	/* echo (rfc1072) */
#define TCPOPT_TIMESTAMP	8	/* timestamp (rfc1323) */
#define    TCPOLEN_TIMESTAMP		10
#define    TCPOLEN_TSTAMP_APPA		(TCPOLEN_TIMESTAMP+2) /* appendix A */
#define TCPOPT_CC		11	/* T/TCP CC options (rfc1644) */
#define TCPOPT_CCNEW		12	/* T/TCP CC options (rfc1644) */
#define TCPOPT_CCECHO		13	/* T/TCP CC options (rfc1644) */
#define TCPOPT_SIGNATURE	19	/* Keyed MD5 (rfc2385) */
#define    TCPOLEN_SIGNATURE		18
#define TCP_SIGLEN 16			/* length of an option 19 digest */
#define TCPOPT_AUTH             20      /* Enhanced AUTH option */

#define TCPOPT_TSTAMP_HDR	\
    (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
Commit	Line	Data
c8cf0f94 PA	1	/* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.11.2.1 2005/11/29 09:09:26 hannes Exp $ (LBL) */
	2	/*
	3	* Copyright (c) 1982, 1986, 1993
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	* 3. All advertising materials mentioning features or use of this software
	15	* must display the following acknowledgement:
	16	* This product includes software developed by the University of
	17	* California, Berkeley and its contributors.
	18	* 4. Neither the name of the University nor the names of its contributors
	19	* may be used to endorse or promote products derived from this software
	20	* without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	* SUCH DAMAGE.
	33	*
	34	* @(#)tcp.h 8.1 (Berkeley) 6/10/93
	35	*/
	36
	37	typedef u_int32_t tcp_seq;
	38	/*
	39	* TCP header.
	40	* Per RFC 793, September, 1981.
	41	*/
	42	struct tcphdr {
	43	u_int16_t th_sport; /* source port */
	44	u_int16_t th_dport; /* destination port */
	45	tcp_seq th_seq; /* sequence number */
	46	tcp_seq th_ack; /* acknowledgement number */
	47	u_int8_t th_offx2; /* data offset, rsvd */
	48	#define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4)
	49	u_int8_t th_flags;
	50	#define TH_FIN 0x01
	51	#define TH_SYN 0x02
	52	#define TH_RST 0x04
	53	#define TH_PUSH 0x08
	54	#define TH_ACK 0x10
	55	#define TH_URG 0x20
	56	#define TH_ECNECHO 0x40 /* ECN Echo */
	57	#define TH_CWR 0x80 /* ECN Cwnd Reduced */
	58	u_int16_t th_win; /* window */
	59	u_int16_t th_sum; /* checksum */
	60	u_int16_t th_urp; /* urgent pointer */
	61	};
	62
	63	#define TCPOPT_EOL 0
	64	#define TCPOPT_NOP 1
65	#define TCPOPT_MAXSEG 2
66	#define TCPOLEN_MAXSEG 4
67	#define TCPOPT_WSCALE 3 /* window scale factor (rfc1323) */
68	#define TCPOPT_SACKOK 4 /* selective ack ok (rfc2018) */
69	#define TCPOPT_SACK 5 /* selective ack (rfc2018) */
70	#define TCPOPT_ECHO 6 /* echo (rfc1072) */
71	#define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */
72	#define TCPOPT_TIMESTAMP 8 /* timestamp (rfc1323) */
73	#define TCPOLEN_TIMESTAMP 10
74	#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
75	#define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */
76	#define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */
77	#define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */
78	#define TCPOPT_SIGNATURE 19 /* Keyed MD5 (rfc2385) */
79	#define TCPOLEN_SIGNATURE 18
80	#define TCP_SIGLEN 16 /* length of an option 19 digest */
81	#define TCPOPT_AUTH 20 /* Enhanced AUTH option */
82
83	#define TCPOPT_TSTAMP_HDR \
84	(TCPOPT_NOP<<24\|TCPOPT_NOP<<16\|TCPOPT_TIMESTAMP<<8\|TCPOLEN_TIMESTAMP)