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-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
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: stable/9/sys/netinet/tcp_seq.h 235657 2012-05-19 18:32:31Z bz $
   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  * Macros to initialize tcp sequence numbers for
   55  * send and receive from initial send and receive
   56  * sequence numbers.
   57  */
   58 #define tcp_rcvseqinit(tp) \
   59         (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
   60 
   61 #define tcp_sendseqinit(tp) \
   62         (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
   63             (tp)->snd_recover = (tp)->iss
   64 
   65 #ifdef _KERNEL
   66 /*
   67  * Clock macros for RFC 1323 timestamps.
   68  */
   69 #define TCP_TS_TO_TICKS(_t)     ((_t) * hz / 1000)
   70 
   71 /* Timestamp wrap-around time, 24 days. */
   72 #define TCP_PAWS_IDLE   (24 * 24 * 60 * 60 * 1000)
   73 
   74 /*
   75  * tcp_ts_getticks() in ms, should be 1ms < x < 1000ms according to RFC 1323.
   76  * We always use 1ms granularity independent of hz.
   77  */
   78 static __inline u_int
   79 tcp_ts_getticks(void)
   80 {
   81         struct timeval tv;
   82         u_long ms;
   83 
   84         /*
   85          * getmicrouptime() should be good enough for any 1-1000ms granularity.
   86          * Do not use getmicrotime() here as it might break nfsroot/tcp.
   87          */
   88         getmicrouptime(&tv);
   89         ms = tv.tv_sec * 1000 + tv.tv_usec / 1000;
   90 
   91         return (ms);
   92 }
   93 #endif /* _KERNEL */
   94 
   95 #endif /* _NETINET_TCP_SEQ_H_ */

Cache object: 1e5332a3f9d36b20c9931e18e18fb0c0


[ 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.