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Annotation of Net2/netinet/tcp_seq.h, revision 1.1

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:  *
        !            33:  *     @(#)tcp_seq.h   7.4 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * TCP sequence numbers are 32 bit integers operated
        !            38:  * on with modular arithmetic.  These macros can be
        !            39:  * used to compare such integers.
        !            40:  */
        !            41: #define        SEQ_LT(a,b)     ((int)((a)-(b)) < 0)
        !            42: #define        SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
        !            43: #define        SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
        !            44: #define        SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
        !            45: 
        !            46: /*
        !            47:  * Macros to initialize tcp sequence numbers for
        !            48:  * send and receive from initial send and receive
        !            49:  * sequence numbers.
        !            50:  */
        !            51: #define        tcp_rcvseqinit(tp) \
        !            52:        (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
        !            53: 
        !            54: #define        tcp_sendseqinit(tp) \
        !            55:        (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
        !            56:            (tp)->iss
        !            57: 
        !            58: #define        TCP_ISSINCR     (125*1024)      /* increment for tcp_iss each second */
        !            59: 
        !            60: #ifdef KERNEL
        !            61: tcp_seq        tcp_iss;                /* tcp initial send seq # */
        !            62: #endif

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