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Annotation of 43BSDTahoe/sys/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 are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  *     @(#)tcp_seq.h   7.3 (Berkeley) 6/29/88
        !            18:  */
        !            19: 
        !            20: /*
        !            21:  * TCP sequence numbers are 32 bit integers operated
        !            22:  * on with modular arithmetic.  These macros can be
        !            23:  * used to compare such integers.
        !            24:  */
        !            25: #define        SEQ_LT(a,b)     ((int)((a)-(b)) < 0)
        !            26: #define        SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
        !            27: #define        SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
        !            28: #define        SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
        !            29: 
        !            30: /*
        !            31:  * Macros to initialize tcp sequence numbers for
        !            32:  * send and receive from initial send and receive
        !            33:  * sequence numbers.
        !            34:  */
        !            35: #define        tcp_rcvseqinit(tp) \
        !            36:        (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
        !            37: 
        !            38: #define        tcp_sendseqinit(tp) \
        !            39:        (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
        !            40:            (tp)->iss
        !            41: 
        !            42: #define        TCP_ISSINCR     (125*1024)      /* increment for tcp_iss each second */
        !            43: 
        !            44: #ifdef KERNEL
        !            45: tcp_seq        tcp_iss;                /* tcp initial send seq # */
        !            46: #endif

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