The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/netinet/tcp_seq.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1982, 1986, 1993, 1995
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)tcp_seq.h   8.3 (Berkeley) 6/21/95
   30  * $FreeBSD: releng/6.4/sys/netinet/tcp_seq.h 144858 2005-04-10 05:24:59Z ps $
   31  */
   32 
   33 #ifndef _NETINET_TCP_SEQ_H_
   34 #define _NETINET_TCP_SEQ_H_
   35 /*
   36  * TCP sequence numbers are 32 bit integers operated
   37  * on with modular arithmetic.  These macros can be
   38  * used to compare such integers.
   39  */
   40 #define SEQ_LT(a,b)     ((int)((a)-(b)) < 0)
   41 #define SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
   42 #define SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
   43 #define SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
   44 
   45 #define SEQ_MIN(a, b)   ((SEQ_LT(a, b)) ? (a) : (b))
   46 #define SEQ_MAX(a, b)   ((SEQ_GT(a, b)) ? (a) : (b))
   47 
   48 /* for modulo comparisons of timestamps */
   49 #define TSTMP_LT(a,b)   ((int)((a)-(b)) < 0)
   50 #define TSTMP_GT(a,b)   ((int)((a)-(b)) > 0)
   51 #define TSTMP_GEQ(a,b)  ((int)((a)-(b)) >= 0)
   52 
   53 /*
   54  * TCP connection counts are 32 bit integers operated
   55  * on with modular arithmetic.  These macros can be
   56  * used to compare such integers.
   57  */
   58 #define CC_LT(a,b)      ((int)((a)-(b)) < 0)
   59 #define CC_LEQ(a,b)     ((int)((a)-(b)) <= 0)
   60 #define CC_GT(a,b)      ((int)((a)-(b)) > 0)
   61 #define CC_GEQ(a,b)     ((int)((a)-(b)) >= 0)
   62 
   63 /* Macro to increment a CC: skip 0 which has a special meaning */
   64 #define CC_INC(c)       (++(c) == 0 ? ++(c) : (c))
   65 
   66 /*
   67  * Macros to initialize tcp sequence numbers for
   68  * send and receive from initial send and receive
   69  * sequence numbers.
   70  */
   71 #define tcp_rcvseqinit(tp) \
   72         (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
   73 
   74 #define tcp_sendseqinit(tp) \
   75         (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
   76             (tp)->snd_recover = (tp)->iss
   77 
   78 #define TCP_PAWS_IDLE   (24 * 24 * 60 * 60 * hz)
   79                                         /* timestamp wrap-around time */
   80 
   81 #endif /* _NETINET_TCP_SEQ_H_ */

Cache object: a1cf1833b62266d12431869ecf5cbd74


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.