bsd/netinet6/pim6.h

   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  * Protocol Independent Multicast (PIM) definitions
  34  *
  35  * Written by Ahmed Helmy, SGI, July 1996
  36  *
  37  * MULTICAST
  38  */
  39 #include <sys/appleapiopts.h>
  40
  41 /*
  42  * PIM packet header
  43  */
  44 #define PIM_VERSION     2
  45 struct pim {
  46 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
  47         u_char  pim_type:4, /* the PIM message type, currently they are:
  48                              * Hello, Register, Register-Stop, Join/Prune,
  49                              * Bootstrap, Assert, Graft (PIM-DM only),
  50                              * Graft-Ack (PIM-DM only), C-RP-Adv
  51                              */
  52                 pim_ver:4;  /* PIM version number; 2 for PIMv2 */
  53 #else
  54         u_char  pim_ver:4,      /* PIM version */
  55                 pim_type:4;     /* PIM type    */
  56 #endif
  57         u_char  pim_rsv;        /* Reserved */
  58         u_short pim_cksum;      /* IP style check sum */
  59 };
  60
  61 #define PIM_MINLEN      8               /* The header min. length is 8    */
  62 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* Register message + inner IP6 header */
  63
  64 /*
  65  * Message types
  66  */
  67 #define PIM_REGISTER    1       /* PIM Register type is 1 */
  68
  69 /* second bit in reg_head is the null bit */
  70 #define PIM_NULL_REGISTER 0x40000000