1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * Copyright (c) 1982, 1986 Regents of the University of California. 3*7c478bd9Sstevel@tonic-gate * All rights reserved. The Berkeley software License Agreement 4*7c478bd9Sstevel@tonic-gate * specifies the terms and conditions for redistribution. 5*7c478bd9Sstevel@tonic-gate */ 6*7c478bd9Sstevel@tonic-gate 7*7c478bd9Sstevel@tonic-gate #ifndef _NETINET_TCP_SEQ_H 8*7c478bd9Sstevel@tonic-gate #define _NETINET_TCP_SEQ_H 9*7c478bd9Sstevel@tonic-gate 10*7c478bd9Sstevel@tonic-gate /* tcp_seq.h 1.7 88/08/19 SMI; from UCB 7.1 6/5/85 */ 11*7c478bd9Sstevel@tonic-gate 12*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 13*7c478bd9Sstevel@tonic-gate extern "C" { 14*7c478bd9Sstevel@tonic-gate #endif 15*7c478bd9Sstevel@tonic-gate 16*7c478bd9Sstevel@tonic-gate /* 17*7c478bd9Sstevel@tonic-gate * TCP sequence numbers are 32 bit integers operated 18*7c478bd9Sstevel@tonic-gate * on with modular arithmetic. These macros can be 19*7c478bd9Sstevel@tonic-gate * used to compare such integers. 20*7c478bd9Sstevel@tonic-gate */ 21*7c478bd9Sstevel@tonic-gate #define SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0) 22*7c478bd9Sstevel@tonic-gate #define SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0) 23*7c478bd9Sstevel@tonic-gate #define SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0) 24*7c478bd9Sstevel@tonic-gate #define SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 25*7c478bd9Sstevel@tonic-gate 26*7c478bd9Sstevel@tonic-gate /* 27*7c478bd9Sstevel@tonic-gate * Macros to initialize tcp sequence numbers for 28*7c478bd9Sstevel@tonic-gate * send and receive from initial send and receive 29*7c478bd9Sstevel@tonic-gate * sequence numbers. 30*7c478bd9Sstevel@tonic-gate */ 31*7c478bd9Sstevel@tonic-gate #define tcp_rcvseqinit(tp) \ 32*7c478bd9Sstevel@tonic-gate (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1 33*7c478bd9Sstevel@tonic-gate 34*7c478bd9Sstevel@tonic-gate #define tcp_sendseqinit(tp) \ 35*7c478bd9Sstevel@tonic-gate (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \ 36*7c478bd9Sstevel@tonic-gate (tp)->iss 37*7c478bd9Sstevel@tonic-gate 38*7c478bd9Sstevel@tonic-gate #define TCP_ISSINCR (125*1024) /* increment for tcp_iss each second */ 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 41*7c478bd9Sstevel@tonic-gate } 42*7c478bd9Sstevel@tonic-gate #endif 43*7c478bd9Sstevel@tonic-gate 44*7c478bd9Sstevel@tonic-gate #endif /* _NETINET_TCP_SEQ_H */ 45