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
30struct 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
45struct 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
53struct 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
62struct 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