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Annotation of sys/netinet/tcp_seq.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: tcp_seq.h,v 1.6 2007/06/15 18:23:06 markus Exp $      */
        !             2: /*     $NetBSD: tcp_seq.h,v 1.6 1995/03/26 20:32:35 jtc Exp $  */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1982, 1986, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. Neither the name of the University nor the names of its contributors
        !            17:  *    may be used to endorse or promote products derived from this software
        !            18:  *    without specific prior written permission.
        !            19:  *
        !            20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            30:  * SUCH DAMAGE.
        !            31:  *
        !            32:  *     @(#)tcp_seq.h   8.1 (Berkeley) 6/10/93
        !            33:  */
        !            34:
        !            35: #ifndef _NETINET_TCP_SEQ_H_
        !            36: #define _NETINET_TCP_SEQ_H_
        !            37:
        !            38: /*
        !            39:  * TCP sequence numbers are 32 bit integers operated
        !            40:  * on with modular arithmetic.  These macros can be
        !            41:  * used to compare such integers.
        !            42:  */
        !            43: #define        SEQ_LT(a,b)     ((int)((a)-(b)) < 0)
        !            44: #define        SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
        !            45: #define        SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
        !            46: #define        SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
        !            47:
        !            48: /*
        !            49:  * Macros to initialize tcp sequence numbers for
        !            50:  * send and receive from initial send and receive
        !            51:  * sequence numbers.
        !            52:  */
        !            53: #define        tcp_rcvseqinit(tp) \
        !            54:        (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
        !            55:
        !            56: #define        tcp_sendseqinit(tp) \
        !            57:        (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
        !            58:            (tp)->iss
        !            59:
        !            60: #define        TCP_ISSINCR     (125*1024)      /* increment for tcp_iss each second */
        !            61: #define        TCP_ISSINCR2    (1*1024*1024)   /* increment for tcp_iss each second */
        !            62:
        !            63: #ifdef _KERNEL
        !            64: extern tcp_seq tcp_iss;                /* tcp initial send seq # */
        !            65: #endif /* _KERNEL */
        !            66: #endif /* _NETINET_TCP_SEQ_H_ */