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Annotation of 43BSD/sys/netinet/tcp_seq.h, revision 1.1.1.1

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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