sl@0: /* TCP_SEQ.H
sl@0:  * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Copyright (c) 1982, 1986 Regents of the University of California.
sl@0:  * All rights reserved.  The Berkeley software License Agreement
sl@0:  * specifies the terms and conditions for redistribution.
sl@0:  */
sl@0: 
sl@0: /** @file
sl@0: @publishedAll
sl@0: @released
sl@0: */
sl@0: 
sl@0: #ifndef	_NETINET_TCP_SEQ_H
sl@0: #define	_NETINET_TCP_SEQ_H
sl@0: 
sl@0: #ifdef	__cplusplus
sl@0: extern "C" {
sl@0: #endif
sl@0: 
sl@0: /**
sl@0: TCP sequence numbers are 32 bit integers operated
sl@0: on with modular arithmetic.  These macros can be
sl@0: used to compare such integers.
sl@0: */
sl@0: #define	SEQ_LT(a, b)	((int)((a)-(b)) < 0)
sl@0: #define	SEQ_LEQ(a, b)	((int)((a)-(b)) <= 0)
sl@0: #define	SEQ_GT(a, b)	((int)((a)-(b)) > 0)
sl@0: #define	SEQ_GEQ(a, b)	((int)((a)-(b)) >= 0)
sl@0: 
sl@0: /**
sl@0: Macros to initialize tcp sequence numbers for
sl@0: send and receive from initial send and receive
sl@0: sequence numbers.
sl@0: */
sl@0: #define	tcp_rcvseqinit(tp) \
sl@0: 	(tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
sl@0: 
sl@0: #define	tcp_sendseqinit(tp) \
sl@0: 	(tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
sl@0: 	    (tp)->iss
sl@0: 
sl@0: #define	TCP_ISSINCR	(125*1024)	/* increment for tcp_iss each second */
sl@0: 
sl@0: #ifdef	__cplusplus
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #endif	/* _NETINET_TCP_SEQ_H */