/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * Linux NET3: Internet Group Management Protocol [IGMP] * * Authors: * Alan Cox <alan@lxorguk.ukuu.org.uk> * * Extended to talk the BSD extended IGMP protocol of mrouted 3.6 * * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _LINUX_IGMP_H #define _LINUX_IGMP_H #include <linux/types.h> #include <asm/byteorder.h> /* * IGMP protocol structures */ /* * Header in on cable format */ struct igmphdr { __u8 type; __u8 code; /* For newer IGMP */ __sum16 csum; __be32 group; }; /* V3 group record types [grec_type] */ #define IGMPV3_MODE_IS_INCLUDE 1 #define IGMPV3_MODE_IS_EXCLUDE 2 #define IGMPV3_CHANGE_TO_INCLUDE 3 #define IGMPV3_CHANGE_TO_EXCLUDE 4 #define IGMPV3_ALLOW_NEW_SOURCES 5 #define IGMPV3_BLOCK_OLD_SOURCES 6 struct igmpv3_grec { __u8 grec_type; __u8 grec_auxwords; __be16 grec_nsrcs; __be32 grec_mca; __be32 grec_src[0]; }; struct igmpv3_report { __u8 type; __u8 resv1; __sum16 csum; __be16 resv2; __be16 ngrec; struct igmpv3_grec grec[0]; }; struct igmpv3_query { __u8 type; __u8 code; __sum16 csum; __be32 group; #if defined(__LITTLE_ENDIAN_BITFIELD) __u8 qrv:3, suppress:1, resv:4; #elif defined(__BIG_ENDIAN_BITFIELD) __u8 resv:4, suppress:1, qrv:3; #else #error "Please fix <asm/byteorder.h>" #endif __u8 qqic; __be16 nsrcs; __be32 srcs[0]; }; #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */ #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */ #define IGMP_DVMRP 0x13 /* DVMRP routing */ #define IGMP_PIM 0x14 /* PIM routing */ #define IGMP_TRACE 0x15 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */ #define IGMP_HOST_LEAVE_MESSAGE 0x17 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */ #define IGMP_MTRACE_RESP 0x1e #define IGMP_MTRACE 0x1f /* * Use the BSD names for these for compatibility */ #define IGMP_DELAYING_MEMBER 0x01 #define IGMP_IDLE_MEMBER 0x02 #define IGMP_LAZY_MEMBER 0x03 #define IGMP_SLEEPING_MEMBER 0x04 #define IGMP_AWAKENING_MEMBER 0x05 #define IGMP_MINLEN 8 #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ /* query (in seconds) */ #define IGMP_TIMER_SCALE 10 /* denotes that the igmphdr->timer field */ /* specifies time in 10th of seconds */ #define IGMP_AGE_THRESHOLD 400 /* If this host don't hear any IGMP V1 */ /* message in this period of time, */ /* revert to IGMP v2 router. */ #define IGMP_ALL_HOSTS htonl(0xE0000001L) #define IGMP_ALL_ROUTER htonl(0xE0000002L) #define IGMPV3_ALL_MCR htonl(0xE0000016L) #define IGMP_LOCAL_GROUP htonl(0xE0000000L) #define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L) /* * struct for keeping the multicast list in */ #endif /* _LINUX_IGMP_H */

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