123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
/*
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NETINET_TCP_H_
|
|
#define _NETINET_TCP_H_
|
|
|
|
typedef u_int32_t tcp_seq;
|
|
typedef u_int32_t tcp_cc; /* connection count per rfc1644 */
|
|
|
|
/*
|
|
* 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_int th_x2:4, /* (unused) */
|
|
th_off:4; /* data offset */
|
|
#endif
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
u_int 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
|
|
#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG)
|
|
|
|
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)
|
|
|
|
#define TCPOPT_CC 11 /* CC options: RFC-1644 */
|
|
#define TCPOPT_CCNEW 12
|
|
#define TCPOPT_CCECHO 13
|
|
#define TCPOLEN_CC 6
|
|
#define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
|
|
#define TCPOPT_CC_HDR(ccopt) \
|
|
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
|
|
|
|
/*
|
|
* 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 TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */
|
|
|
|
#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
|
|
|
|
#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
|
|
#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
|
|
/* max space left for options */
|
|
|
|
/*
|
|
* 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 TCP_NOPUSH 0x04 /* don't push last block of write */
|
|
#define TCP_NOOPT 0x08 /* don't use TCP options */
|
|
|
|
#endif
|