/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

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/*

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* Linux NET3: Internet Group Management Protocol [IGMP]

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*

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* Authors:

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* Alan Cox <alan@lxorguk.ukuu.org.uk>

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*

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* Extended to talk the BSD extended IGMP protocol of mrouted 3.6

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*

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*

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* This program is free software; you can redistribute it and/or

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* modify it under the terms of the GNU General Public License

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* as published by the Free Software Foundation; either version

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* 2 of the License, or (at your option) any later version.

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*/

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#ifndef _LINUX_IGMP_H

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#define _LINUX_IGMP_H

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#include <linux/types.h>

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#include <asm/byteorder.h>

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/*

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* IGMP protocol structures

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*/

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/*

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* Header in on cable format

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*/

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struct igmphdr {

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__u8 type;

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__u8 code; /* For newer IGMP */

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__sum16 csum;

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__be32 group;

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};

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/* V3 group record types [grec_type] */

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#define IGMPV3_MODE_IS_INCLUDE 1

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#define IGMPV3_MODE_IS_EXCLUDE 2

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#define IGMPV3_CHANGE_TO_INCLUDE 3

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#define IGMPV3_CHANGE_TO_EXCLUDE 4

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#define IGMPV3_ALLOW_NEW_SOURCES 5

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#define IGMPV3_BLOCK_OLD_SOURCES 6

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struct igmpv3_grec {

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__u8 grec_type;

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__u8 grec_auxwords;

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__be16 grec_nsrcs;

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__be32 grec_mca;

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__be32 grec_src[0];

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};

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struct igmpv3_report {

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__u8 type;

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__u8 resv1;

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__sum16 csum;

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__be16 resv2;

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__be16 ngrec;

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struct igmpv3_grec grec[0];

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};

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struct igmpv3_query {

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__u8 type;

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__u8 code;

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__sum16 csum;

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__be32 group;

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#if defined(__LITTLE_ENDIAN_BITFIELD)

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__u8 qrv:3,

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suppress:1,

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resv:4;

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#elif defined(__BIG_ENDIAN_BITFIELD)

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__u8 resv:4,

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suppress:1,

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qrv:3;

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#else

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#error "Please fix <asm/byteorder.h>"

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#endif

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__u8 qqic;

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__be16 nsrcs;

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__be32 srcs[0];

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};

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#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */

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#define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */

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#define IGMP_DVMRP 0x13 /* DVMRP routing */

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#define IGMP_PIM 0x14 /* PIM routing */

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#define IGMP_TRACE 0x15

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#define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */

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#define IGMP_HOST_LEAVE_MESSAGE 0x17

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#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */

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#define IGMP_MTRACE_RESP 0x1e

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#define IGMP_MTRACE 0x1f

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#define IGMP_MRDISC_ADV 0x30 /* From RFC4286 */

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/*

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* Use the BSD names for these for compatibility

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*/

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#define IGMP_DELAYING_MEMBER 0x01

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#define IGMP_IDLE_MEMBER 0x02

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#define IGMP_LAZY_MEMBER 0x03

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#define IGMP_SLEEPING_MEMBER 0x04

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#define IGMP_AWAKENING_MEMBER 0x05

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#define IGMP_MINLEN 8

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#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */

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/* query (in seconds) */

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#define IGMP_TIMER_SCALE 10 /* denotes that the igmphdr->timer field */

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/* specifies time in 10th of seconds */

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#define IGMP_AGE_THRESHOLD 400 /* If this host don't hear any IGMP V1 */

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/* message in this period of time, */

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/* revert to IGMP v2 router. */

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#define IGMP_ALL_HOSTS htonl(0xE0000001L)

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#define IGMP_ALL_ROUTER htonl(0xE0000002L)

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#define IGMPV3_ALL_MCR htonl(0xE0000016L)

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#define IGMP_LOCAL_GROUP htonl(0xE0000000L)

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#define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L)

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/*

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* struct for keeping the multicast list in

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*/

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#endif /* _LINUX_IGMP_H */

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