sys/netinet6/pim6.h

   1 /*      $FreeBSD: src/sys/netinet6/pim6.h,v 1.1.2.1 2000/07/15 07:14:36 kris Exp $      */
   2 /*      $DragonFly: src/sys/netinet6/pim6.h,v 1.4 2006/05/20 04:42:12 dillon Exp $      */
   3 /*      $KAME: pim6.h,v 1.3 2000/03/25 07:23:58 sumikawa Exp $  */
   4
   5 /*
   6  * Copyright (C) 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef _NETINET6_PIM6_H_
  35 #define _NETINET6_PIM6_H_
  36
  37 #ifndef _SYS_TYPES_H_
  38 #include <sys/types.h>
  39 #endif
  40 #ifndef _MACHINE_ENDIAN_H_
  41 #include <machine/endian.h>
  42 #endif
  43
  44 /*
  45  * Protocol Independent Multicast (PIM) definitions
  46  *
  47  * Written by Ahmed Helmy, SGI, July 1996
  48  *
  49  * MULTICAST
  50  */
  51
  52 /*
  53  * PIM packet header
  54  */
  55 #define PIM_VERSION     2
  56
  57 struct pim {
  58 #if _BYTE_ORDER == _LITTLE_ENDIAN
  59         u_char  pim_type:4, /* the PIM message type, currently they are:
  60                              * Hello, Register, Register-Stop, Join/Prune,
  61                              * Bootstrap, Assert, Graft (PIM-DM only),
  62                              * Graft-Ack (PIM-DM only), C-RP-Adv
  63                              */
  64                 pim_ver:4;  /* PIM version number; 2 for PIMv2 */
  65 #elif _BYTE_ORDER == _BIG_ENDIAN
  66         u_char  pim_ver:4,      /* PIM version */
  67                 pim_type:4;     /* PIM type    */
  68 #else
  69 #error "Byte order not implemented"
  70 #endif
  71         u_char  pim_rsv;        /* Reserved */
  72         u_short pim_cksum;      /* IP style check sum */
  73 };
  74
  75 #define PIM_MINLEN      8               /* The header min. length is 8    */
  76 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
  77
  78 /*
  79  * Message types
  80  */
  81 #define PIM_REGISTER    1       /* PIM Register type is 1 */
  82
  83 /* second bit in reg_head is the null bit */
  84 #define PIM_NULL_REGISTER 0x40000000
  85
  86 #endif