The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-a
    2  * Copyright (c) 1988 Stephen Deering.
    3  * Copyright (c) 1992, 1993
    4  *      The Regents of the University of California.  All rights reserved.
    5  *
    6  * This code is derived from software contributed to Berkeley by
    7  * Stephen Deering of Stanford University.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      from: @(#)igmp_var.h    8.1 (Berkeley) 7/19/93
   34  * $FreeBSD: releng/7.4/sys/netinet/igmp_var.h 170613 2007-06-12 16:24:56Z bms $
   35  */
   36 
   37 #ifndef _NETINET_IGMP_VAR_H_
   38 #define _NETINET_IGMP_VAR_H_
   39 
   40 /*
   41  * Internet Group Management Protocol (IGMP),
   42  * implementation-specific definitions.
   43  *
   44  * Written by Steve Deering, Stanford, May 1988.
   45  *
   46  * MULTICAST Revision: 3.5.1.3
   47  */
   48 
   49 struct igmpstat {
   50         u_int   igps_rcv_total;         /* total IGMP messages received */
   51         u_int   igps_rcv_tooshort;      /* received with too few bytes */
   52         u_int   igps_rcv_badsum;        /* received with bad checksum */
   53         u_int   igps_rcv_queries;       /* received membership queries */
   54         u_int   igps_rcv_badqueries;    /* received invalid queries */
   55         u_int   igps_rcv_reports;       /* received membership reports */
   56         u_int   igps_rcv_badreports;    /* received invalid reports */
   57         u_int   igps_rcv_ourreports;    /* received reports for our groups */
   58         u_int   igps_snd_reports;       /* sent membership reports */
   59         u_int   igps_rcv_toolong;       /* received with too many bytes */
   60 };
   61 
   62 #ifdef _KERNEL
   63 #define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
   64 
   65 /*
   66  * States for IGMPv2's leave processing
   67  */
   68 #define IGMP_OTHERMEMBER                        0
   69 #define IGMP_IREPORTEDLAST                      1
   70 
   71 /*
   72  * State masks for IGMPv3
   73  */
   74 #define IGMP_V3_NONEXISTENT                     0x01
   75 #define IGMP_V3_OTHERMEMBER                     0x02
   76 #define IGMP_V3_IREPORTEDLAST                   0x04
   77 
   78 /*
   79  * We must remember what version the subnet's querier is.
   80  * We conveniently use the IGMP message type for the proper
   81  * membership report to keep this state.
   82  */
   83 #define IGMP_V1_ROUTER                          IGMP_V1_MEMBERSHIP_REPORT
   84 #define IGMP_V2_ROUTER                          IGMP_V2_MEMBERSHIP_REPORT
   85 #define IGMP_V3_ROUTER                          IGMP_V3_MEMBERSHIP_REPORT
   86 
   87 /*
   88  * Revert to new router if we haven't heard from an old router in
   89  * this amount of time.
   90  */
   91 #define IGMP_AGE_THRESHOLD                      540
   92 
   93 /*
   94  * IGMPv3 protocol defaults
   95  */
   96 #define IGMP_INIT_ROBVAR        2       /* Robustness */
   97 #define IGMP_MAX_ROBVAR         7
   98 #define IGMP_INIT_QRYINT        125     /* Querier's Query interval */
   99 #define IGMP_MAX_QRYINT         255
  100 #define IGMP_INIT_QRYRSP        10      /* Query Response interval */
  101 #define IGMP_DEF_QRYMRT         10
  102 #define IGMP_UNSOL_INT          1       /* Unsolicited Report interval */
  103 
  104 /*
  105  * IGMPv3 report types
  106  */
  107 #define IGMP_REPORT_MODE_IN     1       /* mode-is-include */
  108 #define IGMP_REPORT_MODE_EX     2       /* mode-is-exclude */
  109 #define IGMP_REPORT_TO_IN       3       /* change-to-include */
  110 #define IGMP_REPORT_TO_EX       4       /* change-to-exclude */
  111 #define IGMP_REPORT_ALLOW_NEW   5       /* allow-new-sources */
  112 #define IGMP_REPORT_BLOCK_OLD   6       /* block-old-sources */
  113 
  114 /*
  115  * Report types
  116  */
  117 #define IGMP_MASK_CUR_STATE     0x01    /* Report current-state */
  118 #define IGMP_MASK_ALLOW_NEW     0x02    /* Report source as allow-new */
  119 #define IGMP_MASK_BLOCK_OLD     0x04    /* Report source as block-old */
  120 #define IGMP_MASK_TO_IN         0x08    /* Report source as to_in */
  121 #define IGMP_MASK_TO_EX         0x10    /* Report source as to_ex */
  122 #define IGMP_MASK_STATE_T1      0x20    /* State at T1 */
  123 #define IGMP_MASK_STATE_T2      0x40    /* State at T2 */
  124 #define IGMP_MASK_IF_STATE      0x80    /* Report current-state per interface */
  125 
  126 #define IGMP_MASK_STATE_TX      (IGMP_MASK_STATE_T1 | IGMP_MASK_STATE_T2)
  127 #define IGMP_MASK_PENDING       (IGMP_MASK_CUR_STATE |                  \
  128                                  IGMP_MASK_ALLOW_NEW |                  \
  129                                  IGMP_MASK_BLOCK_OLD)
  130 
  131 /*
  132  * List identifiers
  133  */
  134 #define IGMP_EXCLUDE_LIST       1       /* exclude list used to tag report */
  135 #define IGMP_INCLUDE_LIST       2       /* include list used to tag report */
  136 #define IGMP_RECORDED_LIST      3       /* recorded list used to tag report */
  137 
  138 void    igmp_init(void);
  139 void    igmp_input(struct mbuf *, int);
  140 void    igmp_joingroup(struct in_multi *);
  141 void    igmp_leavegroup(struct in_multi *);
  142 void    igmp_fasttimo(void);
  143 void    igmp_slowtimo(void);
  144 
  145 SYSCTL_DECL(_net_inet_igmp);
  146 
  147 #endif
  148 
  149 /*
  150  * Names for IGMP sysctl objects
  151  */
  152 #define IGMPCTL_STATS           1       /* statistics (read-only) */
  153 #define IGMPCTL_MAXID           2
  154 
  155 #define IGMPCTL_NAMES { \
  156         { 0, 0 }, \
  157         { "stats", CTLTYPE_STRUCT } \
  158 }
  159 #endif

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