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Annotation of researchv9/sys/h/inet/tcp_seq.h, revision 1.1.1.1

1.1       root        1: /*     tcp_seq.h       6.1     83/07/29        */
                      2: 
                      3: /*
                      4:  * TCP sequence numbers are 32 bit integers operated
                      5:  * on with modular arithmetic.  These macros can be
                      6:  * used to compare such integers.
                      7:  */
                      8: #define        SEQ_LT(a,b)     ((int)((a)-(b)) < 0)
                      9: #define        SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
                     10: #define        SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
                     11: #define        SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
                     12: 
                     13: /*
                     14:  * Macros to initialize tcp sequence numbers for
                     15:  * send and receive from initial send and receive
                     16:  * sequence numbers.
                     17:  */
                     18: #define        tcp_rcvseqinit(tp) \
                     19:        (tp)->rcv_nxt = (tp)->irs + 1
                     20: 
                     21: #define        tcp_sendseqinit(tp) \
                     22:        (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
                     23:            (tp)->iss
                     24: 
                     25: #define        TCP_ISSINCR     128             /* increment for tcp_iss each second */
                     26: 
                     27: #ifdef KERNEL
                     28: tcp_seq        tcp_iss;                /* tcp initial send seq # */
                     29: #endif

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