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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 3.69 *10 *11 * This program is free software; you can redistribute it and/or12 * modify it under the terms of the GNU General Public License13 * as published by the Free Software Foundation; either version14 * 2 of the License, or (at your option) any later version.15 */16 17#ifndef _UAPI_LINUX_IGMP_H18#define _UAPI_LINUX_IGMP_H19 20#include <linux/types.h>21#include <asm/byteorder.h>22 23/*24 * IGMP protocol structures25 */26 27/*28 * Header in on cable format29 */30 31struct 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 140#define IGMPV3_MODE_IS_EXCLUDE 241#define IGMPV3_CHANGE_TO_INCLUDE 342#define IGMPV3_CHANGE_TO_EXCLUDE 443#define IGMPV3_ALLOW_NEW_SOURCES 544#define IGMPV3_BLOCK_OLD_SOURCES 645 46struct igmpv3_grec {47 __u8 grec_type;48 __u8 grec_auxwords;49 __be16 grec_nsrcs;50 __be32 grec_mca;51 __be32 grec_src[];52};53 54struct igmpv3_report {55 __u8 type;56 __u8 resv1;57 __sum16 csum;58 __be16 resv2;59 __be16 ngrec;60 struct igmpv3_grec grec[];61};62 63struct 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#else77#error "Please fix <asm/byteorder.h>"78#endif79 __u8 qqic;80 __be16 nsrcs;81 __be32 srcs[];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 0x1589#define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */90#define IGMP_HOST_LEAVE_MESSAGE 0x1791#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */92 93#define IGMP_MTRACE_RESP 0x1e94#define IGMP_MTRACE 0x1f95 96#define IGMP_MRDISC_ADV 0x30 /* From RFC4286 */97 98/*99 * Use the BSD names for these for compatibility100 */101 102#define IGMP_DELAYING_MEMBER 0x01103#define IGMP_IDLE_MEMBER 0x02104#define IGMP_LAZY_MEMBER 0x03105#define IGMP_SLEEPING_MEMBER 0x04106#define IGMP_AWAKENING_MEMBER 0x05107 108#define IGMP_MINLEN 8109 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 in128 */129 130#endif /* _UAPI_LINUX_IGMP_H */131