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Annotation of Net2/netinet/tcp.h, revision 1.1.1.2

1.1       root        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:  *
1.1.1.2 ! root       33:  *     from: @(#)tcp.h 7.7 (Berkeley) 6/28/90
        !            34:  *     tcp.h,v 1.3 1993/05/20 03:50:31 cgd Exp
1.1       root       35:  */
                     36: 
1.1.1.2 ! root       37: #ifndef _NETINET_TCP_H_
        !            38: #define _NETINET_TCP_H_
        !            39: 
1.1       root       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 */
1.1.1.2 ! root       89: 
        !            90: #endif /* !_NETINET_TCP_H_ */

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