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


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/pim6.h

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    1 /*      $FreeBSD: src/sys/netinet6/pim6.h,v 1.1.2.1 2000/07/15 07:14:36 kris Exp $      */
    2 /*      $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $  */
    3 
    4 /*
    5  * Copyright (C) 1998 WIDE Project.
    6  * 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 project 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 PROJECT 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 PROJECT 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 
   33 #ifndef _NETINET6_PIM6_H_
   34 #define _NETINET6_PIM6_H_
   35 
   36 #ifndef _SYS_TYPES_H_
   37 #include <sys/types.h>
   38 #endif
   39 #include <machine/endian.h>
   40 
   41 /*
   42  * Protocol Independent Multicast (PIM) definitions
   43  *
   44  * Written by Ahmed Helmy, SGI, July 1996
   45  *
   46  * MULTICAST
   47  */
   48 
   49 /*
   50  * PIM packet header
   51  */
   52 #define PIM_VERSION     2
   53 
   54 struct pim {
   55 #if _BYTE_ORDER == _LITTLE_ENDIAN
   56         u_char  pim_type:4, /* the PIM message type, currently they are:
   57                              * Hello, Register, Register-Stop, Join/Prune,
   58                              * Bootstrap, Assert, Graft (PIM-DM only),
   59                              * Graft-Ack (PIM-DM only), C-RP-Adv
   60                              */
   61                 pim_ver:4;  /* PIM version number; 2 for PIMv2 */
   62 #elif _BYTE_ORDER == _BIG_ENDIAN
   63         u_char  pim_ver:4,      /* PIM version */
   64                 pim_type:4;     /* PIM type    */
   65 #else
   66 #error "Byte order not implemented"
   67 #endif
   68         u_char  pim_rsv;        /* Reserved */
   69         u_short pim_cksum;      /* IP style check sum */
   70 };
   71 
   72 #define PIM_MINLEN      8               /* The header min. length is 8    */
   73 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
   74 
   75 /*
   76  * Message types
   77  */
   78 #define PIM_REGISTER    1       /* PIM Register type is 1 */
   79 
   80 /* second bit in reg_head is the null bit */
   81 #define PIM_NULL_REGISTER 0x40000000
   82 
   83 #endif

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