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Annotation of sys/netinet6/pim6.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: pim6.h,v 1.3 2005/12/10 01:30:14 deraadt 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:
                     40: /*
                     41:  * PIM packet header
                     42:  */
                     43: #define PIM_VERSION    2
                     44: struct pim {
                     45: #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
                     46:        u_int   pim_type:4, /* the PIM message type, currently they are:
                     47:                             * Hello, Register, Register-Stop, Join/Prune,
                     48:                             * Bootstrap, Assert, Graft (PIM-DM only),
                     49:                             * Graft-Ack (PIM-DM only), C-RP-Adv
                     50:                             */
                     51:                pim_ver:4;  /* PIM version number; 2 for PIMv2 */
                     52: #else
                     53:        u_int   pim_ver:4,      /* PIM version */
                     54:                pim_type:4;     /* PIM type    */
                     55: #endif
                     56:        u_char  pim_rsv;        /* Reserved */
                     57:        u_short pim_cksum;      /* IP style check sum */
                     58: };
                     59:
                     60: #define PIM_MINLEN     8               /* The header min. length is 8    */
                     61: #define PIM6_REG_MINLEN        (PIM_MINLEN+40) /* Register message + inner IP6 header */
                     62:
                     63: /*
                     64:  * Message types
                     65:  */
                     66: #define PIM_REGISTER   1       /* PIM Register type is 1 */
                     67:
                     68: /* second bit in reg_head is the null bit */
                     69: #define PIM_NULL_REGISTER 0x40000000