Annotation of sys/netinet/tcp_seq.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: tcp_seq.h,v 1.6 2007/06/15 18:23:06 markus Exp $ */
! 2: /* $NetBSD: tcp_seq.h,v 1.6 1995/03/26 20:32:35 jtc Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)tcp_seq.h 8.1 (Berkeley) 6/10/93
! 33: */
! 34:
! 35: #ifndef _NETINET_TCP_SEQ_H_
! 36: #define _NETINET_TCP_SEQ_H_
! 37:
! 38: /*
! 39: * TCP sequence numbers are 32 bit integers operated
! 40: * on with modular arithmetic. These macros can be
! 41: * used to compare such integers.
! 42: */
! 43: #define SEQ_LT(a,b) ((int)((a)-(b)) < 0)
! 44: #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
! 45: #define SEQ_GT(a,b) ((int)((a)-(b)) > 0)
! 46: #define SEQ_GEQ(a,b) ((int)((a)-(b)) >= 0)
! 47:
! 48: /*
! 49: * Macros to initialize tcp sequence numbers for
! 50: * send and receive from initial send and receive
! 51: * sequence numbers.
! 52: */
! 53: #define tcp_rcvseqinit(tp) \
! 54: (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
! 55:
! 56: #define tcp_sendseqinit(tp) \
! 57: (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
! 58: (tp)->iss
! 59:
! 60: #define TCP_ISSINCR (125*1024) /* increment for tcp_iss each second */
! 61: #define TCP_ISSINCR2 (1*1024*1024) /* increment for tcp_iss each second */
! 62:
! 63: #ifdef _KERNEL
! 64: extern tcp_seq tcp_iss; /* tcp initial send seq # */
! 65: #endif /* _KERNEL */
! 66: #endif /* _NETINET_TCP_SEQ_H_ */
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