tcp.h
资源名称:ixp425BSP.rar [点击查看]
上传用户:luoyougen
上传日期:2008-05-12
资源大小:23136k
文件大小:5k
源码类别:
VxWorks
开发平台:
C/C++
- /* tcp.h - tcp header file */
- /* Copyright 1984-1996 Wind River Systems, Inc. */
- /*
- * 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
- */
- /*
- modification history
- --------------------
- 01a,03mar96,vin created from BSD4.4 stuff. integrated with 02k of tcp.h
- Corrected bit fields according to ansi spec.
- */
- #ifndef __INCtcph
- #define __INCtcph
- #ifdef __cplusplus
- extern "C" {
- #endif
- #ifndef _BYTE_ORDER
- /*
- * Definitions for byte order,
- * according to byte significance from low address to high.
- */
- #define _LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */
- #define _BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
- #define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
- #ifdef vax
- #define _BYTE_ORDER _LITTLE_ENDIAN
- #else
- #define _BYTE_ORDER _BIG_ENDIAN /* mc68000, tahoe, most others */
- #endif
- #endif /* _BYTE_ORDER */
- typedef u_long tcp_seq;
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 1 /* tell gcc960 not to optimize alignments */
- #endif /* CPU_FAMILY==I960 */
- /*
- * 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
- th_flags:8,
- #define TH_FIN 0x01
- #define TH_SYN 0x02
- #define TH_RST 0x04
- #define TH_PUSH 0x08
- #define TH_ACK 0x10
- #define TH_URG 0x20
- th_win:16; /* window */
- u_short th_sum; /* checksum */
- u_short th_urp; /* urgent pointer */
- };
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 0 /* turn off alignment requirement */
- #endif /* CPU_FAMILY==I960 */
- #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 */
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCtcph */