1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * Linux NET3: Internet Group Management Protocol [IGMP] 4 * 5 * Authors: 6 * Alan Cox <alan@lxorguk.ukuu.org.uk> 7 * 8 * Extended to talk the BSD extended IGMP protocol of mrouted 3.6 9 * 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 */ 16 17 #ifndef _UAPI_LINUX_IGMP_H 18 #define _UAPI_LINUX_IGMP_H 19 20 #include <linux/types.h> 21 #include <asm/byteorder.h> 22 23 /* 24 * IGMP protocol structures 25 */ 26 27 /* 28 * Header in on cable format 29 */ 30 31 struct igmphdr { 32 __u8 type; 33 __u8 code; /* For newer IGMP */ 34 __sum16 csum; 35 __be32 group; 36 }; 37 38 /* V3 group record types [grec_type] */ 39 #define IGMPV3_MODE_IS_INCLUDE 1 40 #define IGMPV3_MODE_IS_EXCLUDE 2 41 #define IGMPV3_CHANGE_TO_INCLUDE 3 42 #define IGMPV3_CHANGE_TO_EXCLUDE 4 43 #define IGMPV3_ALLOW_NEW_SOURCES 5 44 #define IGMPV3_BLOCK_OLD_SOURCES 6 45 46 struct igmpv3_grec { 47 __u8 grec_type; 48 __u8 grec_auxwords; 49 __be16 grec_nsrcs; 50 __be32 grec_mca; 51 __be32 grec_src[0]; 52 }; 53 54 struct igmpv3_report { 55 __u8 type; 56 __u8 resv1; 57 __sum16 csum; 58 __be16 resv2; 59 __be16 ngrec; 60 struct igmpv3_grec grec[0]; 61 }; 62 63 struct igmpv3_query { 64 __u8 type; 65 __u8 code; 66 __sum16 csum; 67 __be32 group; 68 #if defined(__LITTLE_ENDIAN_BITFIELD) 69 __u8 qrv:3, 70 suppress:1, 71 resv:4; 72 #elif defined(__BIG_ENDIAN_BITFIELD) 73 __u8 resv:4, 74 suppress:1, 75 qrv:3; 76 #else 77 #error "Please fix <asm/byteorder.h>" 78 #endif 79 __u8 qqic; 80 __be16 nsrcs; 81 __be32 srcs[0]; 82 }; 83 84 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */ 85 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */ 86 #define IGMP_DVMRP 0x13 /* DVMRP routing */ 87 #define IGMP_PIM 0x14 /* PIM routing */ 88 #define IGMP_TRACE 0x15 89 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */ 90 #define IGMP_HOST_LEAVE_MESSAGE 0x17 91 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */ 92 93 #define IGMP_MTRACE_RESP 0x1e 94 #define IGMP_MTRACE 0x1f 95 96 #define IGMP_MRDISC_ADV 0x30 /* From RFC4286 */ 97 98 /* 99 * Use the BSD names for these for compatibility 100 */ 101 102 #define IGMP_DELAYING_MEMBER 0x01 103 #define IGMP_IDLE_MEMBER 0x02 104 #define IGMP_LAZY_MEMBER 0x03 105 #define IGMP_SLEEPING_MEMBER 0x04 106 #define IGMP_AWAKENING_MEMBER 0x05 107 108 #define IGMP_MINLEN 8 109 110 #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ 111 /* query (in seconds) */ 112 113 #define IGMP_TIMER_SCALE 10 /* denotes that the igmphdr->timer field */ 114 /* specifies time in 10th of seconds */ 115 116 #define IGMP_AGE_THRESHOLD 400 /* If this host don't hear any IGMP V1 */ 117 /* message in this period of time, */ 118 /* revert to IGMP v2 router. */ 119 120 #define IGMP_ALL_HOSTS htonl(0xE0000001L) 121 #define IGMP_ALL_ROUTER htonl(0xE0000002L) 122 #define IGMPV3_ALL_MCR htonl(0xE0000016L) 123 #define IGMP_LOCAL_GROUP htonl(0xE0000000L) 124 #define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L) 125 126 /* 127 * struct for keeping the multicast list in 128 */ 129 130 #endif /* _UAPI_LINUX_IGMP_H */ 131