The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/pim.h

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    1 /*-
    2  * Copyright (c) 1996-2000
    3  * University of Southern California/Information Sciences Institute.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. Neither the name of the project nor the names of its contributors
   15  *    may be used to endorse or promote products derived from this software
   16  *    without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/11.1/sys/netinet/pim.h 139823 2005-01-07 01:45:51Z imp $
   31  */
   32 
   33 #ifndef _NETINET_PIM_H_
   34 #define _NETINET_PIM_H_
   35 
   36 /*
   37  * Protocol Independent Multicast (PIM) definitions.
   38  * RFC 2362, June 1998.
   39  *
   40  * Written by Ahmed Helmy, USC/SGI, July 1996.
   41  * Modified by George Edmond Eddy (Rusty), ISI, February 1998.
   42  * Modified by Pavlin Radoslavov, USC/ISI, May 1998, October 2000.
   43  */
   44 
   45 #include <sys/types.h>
   46 
   47 #ifndef _PIM_VT
   48 #ifndef BYTE_ORDER
   49 # error BYTE_ORDER is not defined!
   50 #endif
   51 #if (BYTE_ORDER != BIG_ENDIAN) && (BYTE_ORDER != LITTLE_ENDIAN)
   52 # error BYTE_ORDER must be defined to either BIG_ENDIAN or LITTLE_ENDIAN
   53 #endif
   54 #endif /* ! _PIM_VT */
   55 
   56 /*
   57  * PIM packet header
   58  */
   59 struct pim {
   60 #ifdef _PIM_VT
   61         uint8_t         pim_vt;         /* PIM version and message type */
   62 #else /* ! _PIM_VT   */
   63 #if BYTE_ORDER == BIG_ENDIAN
   64         u_int           pim_vers:4,     /* PIM protocol version         */
   65                         pim_type:4;     /* PIM message type             */
   66 #endif
   67 #if BYTE_ORDER == LITTLE_ENDIAN
   68         u_int           pim_type:4,     /* PIM message type             */
   69                         pim_vers:4;     /* PIM protocol version         */
   70 #endif
   71 #endif /* ! _PIM_VT  */
   72         uint8_t         pim_reserved;   /* Reserved                     */
   73         uint16_t        pim_cksum;      /* IP-style checksum            */
   74 };
   75 /* KAME-related name backward compatibility */
   76 #define pim_ver pim_vers
   77 #define pim_rsv pim_reserved
   78 
   79 #ifdef _PIM_VT
   80 #define PIM_MAKE_VT(v, t)       (0xff & (((v) << 4) | (0x0f & (t))))
   81 #define PIM_VT_V(x)             (((x) >> 4) & 0x0f)
   82 #define PIM_VT_T(x)             ((x) & 0x0f)
   83 #endif /* _PIM_VT */
   84 
   85 #define PIM_VERSION             2
   86 #define PIM_MINLEN              8       /* PIM message min. length      */
   87 #define PIM_REG_MINLEN  (PIM_MINLEN+20) /* PIM Register hdr + inner IPv4 hdr */
   88 #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* PIM Register hdr + inner IPv6 hdr */
   89 
   90 /*
   91  * PIM message types
   92  */
   93 #define PIM_HELLO               0x0     /* PIM-SM and PIM-DM            */
   94 #define PIM_REGISTER            0x1     /* PIM-SM only                  */
   95 #define PIM_REGISTER_STOP       0x2     /* PIM-SM only                  */
   96 #define PIM_JOIN_PRUNE          0x3     /* PIM-SM and PIM-DM            */
   97 #define PIM_BOOTSTRAP           0x4     /* PIM-SM only                  */
   98 #define PIM_ASSERT              0x5     /* PIM-SM and PIM-DM            */
   99 #define PIM_GRAFT               0x6     /* PIM-DM only                  */
  100 #define PIM_GRAFT_ACK           0x7     /* PIM-DM only                  */
  101 #define PIM_CAND_RP_ADV         0x8     /* PIM-SM only                  */
  102 #define PIM_ALL_DF_ELECTION     0xa     /* Bidir-PIM-SM only            */
  103 
  104 /*
  105  * PIM-Register message flags
  106  */
  107 #define PIM_BORDER_REGISTER 0x80000000U /* The Border bit (host-order)  */
  108 #define PIM_NULL_REGISTER   0x40000000U /* The Null-Register bit (host-order)*/
  109 
  110 /*
  111  * All-PIM-Routers IPv4 and IPv6 multicast addresses
  112  */
  113 #define INADDR_ALLPIM_ROUTERS_GROUP     (uint32_t)0xe000000dU  /* 224.0.0.13 */
  114 #define IN6ADDR_LINKLOCAL_ALLPIM_ROUTERS        "ff02::d"
  115 #define IN6ADDR_LINKLOCAL_ALLPIM_ROUTERS_INIT                           \
  116         {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
  117             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d }}}
  118 
  119 #endif /* _NETINET_PIM_H_ */

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