FreeBSD/Linux Kernel Cross Reference
sys/netinet/pim.h

     /*
      * Copyright (c) 1996-2000
      * University of Southern California/Information Sciences Institute.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD: releng/5.2/sys/netinet/pim.h 118623 2003-08-07 18:17:43Z hsu $
     */
    
    #ifndef _NETINET_PIM_H_
    #define _NETINET_PIM_H_
    
    /*
     * Protocol Independent Multicast (PIM) definitions.
     * RFC 2362, June 1998.
     *
     * Written by Ahmed Helmy, USC/SGI, July 1996.
     * Modified by George Edmond Eddy (Rusty), ISI, February 1998.
     * Modified by Pavlin Radoslavov, USC/ISI, May 1998, October 2000.
     */
    
    #ifndef _PIM_VT
    #ifndef BYTE_ORDER
    # error BYTE_ORDER is not defined!
    #endif
    #if (BYTE_ORDER != BIG_ENDIAN) && (BYTE_ORDER != LITTLE_ENDIAN)
    # error BYTE_ORDER must be defined to either BIG_ENDIAN or LITTLE_ENDIAN
    #endif
    #endif /* ! _PIM_VT */
    
    /*
     * PIM packet header
     */
    struct pim {
    #ifdef _PIM_VT
            uint8_t         pim_vt;         /* PIM version and message type */
    #else /* ! _PIM_VT   */
    #if BYTE_ORDER == BIG_ENDIAN
            u_int           pim_vers:4,     /* PIM protocol version         */
                            pim_type:4;     /* PIM message type             */
    #endif
    #if BYTE_ORDER == LITTLE_ENDIAN
            u_int           pim_type:4,     /* PIM message type             */
                            pim_vers:4;     /* PIM protocol version         */
    #endif
    #endif /* ! _PIM_VT  */
            uint8_t         pim_reserved;   /* Reserved                     */
            uint16_t        pim_cksum;      /* IP-style checksum            */
    };
    /* KAME-related name backward compatibility */
    #define pim_ver pim_vers
    #define pim_rsv pim_reserved
    
    #ifdef _PIM_VT
    #define PIM_MAKE_VT(v, t)       (0xff & (((v) << 4) | (0x0f & (t))))
    #define PIM_VT_V(x)             (((x) >> 4) & 0x0f)
    #define PIM_VT_T(x)             ((x) & 0x0f)
    #endif /* _PIM_VT */
    
    #define PIM_VERSION             2
    #define PIM_MINLEN              8       /* PIM message min. length      */
    #define PIM_REG_MINLEN  (PIM_MINLEN+20) /* PIM Register hdr + inner IPv4 hdr */
    #define PIM6_REG_MINLEN (PIM_MINLEN+40) /* PIM Register hdr + inner IPv6 hdr */
    
    /*
     * PIM message types
     */
    #define PIM_HELLO               0x0     /* PIM-SM and PIM-DM            */
    #define PIM_REGISTER            0x1     /* PIM-SM only                  */
    #define PIM_REGISTER_STOP       0x2     /* PIM-SM only                  */
    #define PIM_JOIN_PRUNE          0x3     /* PIM-SM and PIM-DM            */
    #define PIM_BOOTSTRAP           0x4     /* PIM-SM only                  */
    #define PIM_ASSERT              0x5     /* PIM-SM and PIM-DM            */
    #define PIM_GRAFT               0x6     /* PIM-DM only                  */
    #define PIM_GRAFT_ACK           0x7     /* PIM-DM only                  */
    #define PIM_CAND_RP_ADV         0x8     /* PIM-SM only                  */
   #define PIM_ALL_DF_ELECTION     0xa     /* Bidir-PIM-SM only            */
   
   /*
    * PIM-Register message flags
    */
   #define PIM_BORDER_REGISTER 0x80000000U /* The Border bit (host-order)  */
   #define PIM_NULL_REGISTER   0x40000000U /* The Null-Register bit (host-order)*/
   
   /*
    * All-PIM-Routers IPv4 and IPv6 multicast addresses
    */
   #define INADDR_ALLPIM_ROUTERS_GROUP     (uint32_t)0xe000000dU  /* 224.0.0.13 */
   #define IN6ADDR_LINKLOCAL_ALLPIM_ROUTERS        "ff02::d"
   #define IN6ADDR_LINKLOCAL_ALLPIM_ROUTERS_INIT                           \
           {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             \
               0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d }}}
   
   #endif /* _NETINET_PIM_H_ */

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