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 */ 129