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Annotation of 43BSD/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.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)tcp_seq.h   7.1 (Berkeley) 6/5/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * TCP sequence numbers are 32 bit integers operated
        !            11:  * on with modular arithmetic.  These macros can be
        !            12:  * used to compare such integers.
        !            13:  */
        !            14: #define        SEQ_LT(a,b)     ((int)((a)-(b)) < 0)
        !            15: #define        SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
        !            16: #define        SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
        !            17: #define        SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
        !            18: 
        !            19: /*
        !            20:  * Macros to initialize tcp sequence numbers for
        !            21:  * send and receive from initial send and receive
        !            22:  * sequence numbers.
        !            23:  */
        !            24: #define        tcp_rcvseqinit(tp) \
        !            25:        (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
        !            26: 
        !            27: #define        tcp_sendseqinit(tp) \
        !            28:        (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
        !            29:            (tp)->iss
        !            30: 
        !            31: #define        TCP_ISSINCR     (125*1024)      /* increment for tcp_iss each second */
        !            32: 
        !            33: #ifdef KERNEL
        !            34: tcp_seq        tcp_iss;                /* tcp initial send seq # */
        !            35: #endif

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