sys/netinet/pim.h

root/sys/netinet/pim.h
/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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.
 */

#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.
 */

#include <sys/types.h>

#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            */
} __packed;
/* 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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