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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 | ||
30 | struct 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 | ||
45 | struct 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 | ||
53 | struct igmpv3_report { | |
54 | __u8 type; | |
55 | __u8 resv1; | |
53631a5f | 56 | __sum16 csum; |
607ca46e DH |
57 | __be16 resv2; |
58 | __be16 ngrec; | |
59 | struct igmpv3_grec grec[0]; | |
60 | }; | |
61 | ||
62 | struct igmpv3_query { | |
63 | __u8 type; | |
64 | __u8 code; | |
53631a5f | 65 | __sum16 csum; |
607ca46e DH |
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 */ |