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Annotation of sys/netinet/igmp.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: igmp.h,v 1.6 2003/06/02 23:28:13 millert Exp $        */
                      2: /*     $NetBSD: igmp.h,v 1.6 1995/05/31 06:08:21 mycroft Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1988 Stephen Deering.
                      6:  * Copyright (c) 1992, 1993
                      7:  *     The Regents of the University of California.  All rights reserved.
                      8:  *
                      9:  * This code is derived from software contributed to Berkeley by
                     10:  * Stephen Deering of Stanford University.
                     11:  *
                     12:  * Redistribution and use in source and binary forms, with or without
                     13:  * modification, are permitted provided that the following conditions
                     14:  * are met:
                     15:  * 1. Redistributions of source code must retain the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer.
                     17:  * 2. Redistributions in binary form must reproduce the above copyright
                     18:  *    notice, this list of conditions and the following disclaimer in the
                     19:  *    documentation and/or other materials provided with the distribution.
                     20:  * 3. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  *
                     36:  *     @(#)igmp.h      8.1 (Berkeley) 6/10/93
                     37:  */
                     38:
                     39: #ifndef _NETINET_IGMP_H_
                     40: #define _NETINET_IGMP_H_
                     41:
                     42: /*
                     43:  * Internet Group Management Protocol (IGMP) definitions.
                     44:  *
                     45:  * MULTICAST 1.3
                     46:  */
                     47:
                     48: /*
                     49:  * IGMP packet format.
                     50:  */
                     51: struct igmp {
                     52:        u_int8_t        igmp_type;      /* version & type of IGMP message  */
                     53:        u_int8_t        igmp_code;      /* code for routing sub-messages   */
                     54:        u_int16_t       igmp_cksum;     /* IP-style checksum               */
                     55:        struct in_addr  igmp_group;     /* group address being reported    */
                     56: };                                     /*  (zero for queries)             */
                     57:
                     58: #define        IGMP_MINLEN                  8
                     59:
                     60: #define        IGMP_HOST_MEMBERSHIP_QUERY      0x11  /* membership query      */
                     61: #define        IGMP_v1_HOST_MEMBERSHIP_REPORT  0x12  /* v1 membership report  */
                     62: #define        IGMP_DVMRP                      0x13  /* DVMRP routing message */
                     63: #define        IGMP_PIM                        0x14  /* PIM routing message   */
                     64: #define        IGMP_v2_HOST_MEMBERSHIP_REPORT  0x16  /* v2 membership report  */
                     65: #define        IGMP_HOST_LEAVE_MESSAGE         0x17  /* leave-group message   */
                     66: #define        IGMP_MTRACE_REPLY               0x1e  /* traceroute reply      */
                     67: #define        IGMP_MTRACE_QUERY               0x1f  /* traceroute query      */
                     68:
                     69: #define        IGMP_MAX_HOST_REPORT_DELAY      10    /* max delay for response to */
                     70:                                              /*  query (in seconds)       */
                     71:
                     72: #define        IGMP_TIMER_SCALE                10    /* denominator for igmp_timer */
                     73:
                     74: /*
                     75:  * States for the IGMP v2 state table.
                     76:  */
                     77: #define        IGMP_DELAYING_MEMBER    1
                     78: #define        IGMP_IDLE_MEMBER        2
                     79: #define        IGMP_LAZY_MEMBER        3
                     80: #define        IGMP_SLEEPING_MEMBER    4
                     81: #define        IGMP_AWAKENING_MEMBER   5
                     82:
                     83: /*
                     84:  * States for IGMP router version cache.
                     85:  */
                     86: #define        IGMP_v1_ROUTER          1
                     87: #define        IGMP_v2_ROUTER          2
                     88:
                     89: /*
                     90:  * Revert to v2 if we haven't heard from the router in this amount of time.
                     91:  */
                     92: #define        IGMP_AGE_THRESHOLD      540
                     93:
                     94: #ifdef _KERNEL
                     95: void   rti_delete(struct ifnet *);
                     96: #endif /* _KERNEL */
                     97: #endif /* _NETINET_IGMP_H_ */