include/uapi/linux/igmp.h

   1 /*
   2  *      Linux NET3:     Internet Group Management Protocol  [IGMP]
   3  *
   4  *      Authors:
   5  *              Alan Cox <alan@lxorguk.ukuu.org.uk>
   6  *
   7  *      Extended to talk the BSD extended IGMP protocol of mrouted 3.6
   8  *
   9  *
  10  *      This program is free software; you can redistribute it and/or
  11  *      modify it under the terms of the GNU General Public License
  12  *      as published by the Free Software Foundation; either version
  13  *      2 of the License, or (at your option) any later version.
  14  */
  15
  16 #ifndef _UAPI_LINUX_IGMP_H
  17 #define _UAPI_LINUX_IGMP_H
  18
  19 #include <linux/types.h>
  20 #include <asm/byteorder.h>
  21
  22 /*
  23  *      IGMP protocol structures
  24  */
  25
  26 /*
  27  *      Header in on cable format
  28  */
  29
  30 struct igmphdr {
  31         __u8 type;
  32         __u8 code;              /* For newer IGMP */
  33         __sum16 csum;
  34         __be32 group;
  35 };
  36
  37 /* V3 group record types [grec_type] */
  38 #define IGMPV3_MODE_IS_INCLUDE          1
  39 #define IGMPV3_MODE_IS_EXCLUDE          2
  40 #define IGMPV3_CHANGE_TO_INCLUDE        3
  41 #define IGMPV3_CHANGE_TO_EXCLUDE        4
  42 #define IGMPV3_ALLOW_NEW_SOURCES        5
  43 #define IGMPV3_BLOCK_OLD_SOURCES        6
  44
  45 struct igmpv3_grec {
  46         __u8    grec_type;
  47         __u8    grec_auxwords;
  48         __be16  grec_nsrcs;
  49         __be32  grec_mca;
  50         __be32  grec_src[0];
  51 };
  52
  53 struct igmpv3_report {
  54         __u8 type;
  55         __u8 resv1;
  56         __be16 csum;
  57         __be16 resv2;
  58         __be16 ngrec;
  59         struct igmpv3_grec grec[0];
  60 };
  61
  62 struct igmpv3_query {
  63         __u8 type;
  64         __u8 code;
  65         __be16 csum;
  66         __be32 group;
  67 #if defined(__LITTLE_ENDIAN_BITFIELD)
  68         __u8 qrv:3,
  69              suppress:1,
  70              resv:4;
  71 #elif defined(__BIG_ENDIAN_BITFIELD)
  72         __u8 resv:4,
  73              suppress:1,
  74              qrv:3;
  75 #else
  76 #error "Please fix <asm/byteorder.h>"
  77 #endif
  78         __u8 qqic;
  79         __be16 nsrcs;
  80         __be32 srcs[0];
  81 };
  82
  83 #define IGMP_HOST_MEMBERSHIP_QUERY      0x11    /* From RFC1112 */
  84 #define IGMP_HOST_MEMBERSHIP_REPORT     0x12    /* Ditto */
  85 #define IGMP_DVMRP                      0x13    /* DVMRP routing */
  86 #define IGMP_PIM                        0x14    /* PIM routing */
  87 #define IGMP_TRACE                      0x15
  88 #define IGMPV2_HOST_MEMBERSHIP_REPORT   0x16    /* V2 version of 0x12 */
  89 #define IGMP_HOST_LEAVE_MESSAGE         0x17
  90 #define IGMPV3_HOST_MEMBERSHIP_REPORT   0x22    /* V3 version of 0x12 */
  91
  92 #define IGMP_MTRACE_RESP                0x1e
  93 #define IGMP_MTRACE                     0x1f
  94
  95
  96 /*
  97  *      Use the BSD names for these for compatibility
  98  */
  99
 100 #define IGMP_DELAYING_MEMBER            0x01
 101 #define IGMP_IDLE_MEMBER                0x02
 102 #define IGMP_LAZY_MEMBER                0x03
 103 #define IGMP_SLEEPING_MEMBER            0x04
 104 #define IGMP_AWAKENING_MEMBER           0x05
 105
 106 #define IGMP_MINLEN                     8
 107
 108 #define IGMP_MAX_HOST_REPORT_DELAY      10      /* max delay for response to */
 109                                                 /* query (in seconds)   */
 110
 111 #define IGMP_TIMER_SCALE                10      /* denotes that the igmphdr->timer field */
 112                                                 /* specifies time in 10th of seconds     */
 113
 114 #define IGMP_AGE_THRESHOLD              400     /* If this host don't hear any IGMP V1  */
 115                                                 /* message in this period of time,      */
 116                                                 /* revert to IGMP v2 router.            */
 117
 118 #define IGMP_ALL_HOSTS          htonl(0xE0000001L)
 119 #define IGMP_ALL_ROUTER         htonl(0xE0000002L)
 120 #define IGMPV3_ALL_MCR          htonl(0xE0000016L)
 121 #define IGMP_LOCAL_GROUP        htonl(0xE0000000L)
 122 #define IGMP_LOCAL_GROUP_MASK   htonl(0xFFFFFF00L)
 123
 124 /*
 125  * struct for keeping the multicast list in
 126  */
 127
 128 #endif /* _UAPI_LINUX_IGMP_H */