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/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef _NETINET_TCP_SEQ_H
#define _NETINET_TCP_SEQ_H
#pragma ident "%Z%%M% %I% %E% SMI"
/* tcp_seq.h 1.7 88/08/19 SMI; from UCB 7.1 6/5/85 */
#ifdef __cplusplus
extern "C" {
#endif
/*
* TCP sequence numbers are 32 bit integers operated
* on with modular arithmetic. These macros can be
* used to compare such integers.
*/
#define SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0)
#define SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0)
#define SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0)
#define SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0)
/*
* Macros to initialize tcp sequence numbers for
* send and receive from initial send and receive
* sequence numbers.
*/
#define tcp_rcvseqinit(tp) \
(tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
#define tcp_sendseqinit(tp) \
(tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
(tp)->iss
#define TCP_ISSINCR (125*1024) /* increment for tcp_iss each second */
#ifdef __cplusplus
}
#endif
#endif /* _NETINET_TCP_SEQ_H */
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