| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 */ |