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-rw-r--r--include/linux/igmp.h219
1 files changed, 219 insertions, 0 deletions
diff --git a/include/linux/igmp.h b/include/linux/igmp.h
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1/*
2 * Linux NET3: Internet Group Management Protocol [IGMP]
3 *
4 * Authors:
5 * Alan Cox <Alan.Cox@linux.org>
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 _LINUX_IGMP_H
17#define _LINUX_IGMP_H
18
19#include <asm/byteorder.h>
20
21/*
22 * IGMP protocol structures
23 */
24
25/*
26 * Header in on cable format
27 */
28
29struct igmphdr
30{
31 __u8 type;
32 __u8 code; /* For newer IGMP */
33 __u16 csum;
34 __u32 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 __u16 grec_nsrcs;
49 __u32 grec_mca;
50 __u32 grec_src[0];
51};
52
53struct igmpv3_report {
54 __u8 type;
55 __u8 resv1;
56 __u16 csum;
57 __u16 resv2;
58 __u16 ngrec;
59 struct igmpv3_grec grec[0];
60};
61
62struct igmpv3_query {
63 __u8 type;
64 __u8 code;
65 __u16 csum;
66 __u32 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 __u16 nsrcs;
80 __u32 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 0x11 */
89#define IGMP_HOST_LEAVE_MESSAGE 0x17
90#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x11 */
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#ifdef __KERNEL__
129#include <linux/skbuff.h>
130#include <linux/in.h>
131
132struct ip_sf_socklist
133{
134 unsigned int sl_max;
135 unsigned int sl_count;
136 __u32 sl_addr[0];
137};
138
139#define IP_SFLSIZE(count) (sizeof(struct ip_sf_socklist) + \
140 (count) * sizeof(__u32))
141
142#define IP_SFBLOCK 10 /* allocate this many at once */
143
144/* ip_mc_socklist is real list now. Speed is not argument;
145 this list never used in fast path code
146 */
147
148struct ip_mc_socklist
149{
150 struct ip_mc_socklist *next;
151 int count;
152 struct ip_mreqn multi;
153 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
154 struct ip_sf_socklist *sflist;
155};
156
157struct ip_sf_list
158{
159 struct ip_sf_list *sf_next;
160 __u32 sf_inaddr;
161 unsigned long sf_count[2]; /* include/exclude counts */
162 unsigned char sf_gsresp; /* include in g & s response? */
163 unsigned char sf_oldin; /* change state */
164 unsigned char sf_crcount; /* retrans. left to send */
165};
166
167struct ip_mc_list
168{
169 struct in_device *interface;
170 unsigned long multiaddr;
171 struct ip_sf_list *sources;
172 struct ip_sf_list *tomb;
173 unsigned int sfmode;
174 unsigned long sfcount[2];
175 struct ip_mc_list *next;
176 struct timer_list timer;
177 int users;
178 atomic_t refcnt;
179 spinlock_t lock;
180 char tm_running;
181 char reporter;
182 char unsolicit_count;
183 char loaded;
184 unsigned char gsquery; /* check source marks? */
185 unsigned char crcount;
186};
187
188/* V3 exponential field decoding */
189#define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
190#define IGMPV3_EXP(thresh, nbmant, nbexp, value) \
191 ((value) < (thresh) ? (value) : \
192 ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
193 (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
194
195#define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)
196#define IGMPV3_MRC(value) IGMPV3_EXP(0x80, 4, 3, value)
197
198extern int ip_check_mc(struct in_device *dev, u32 mc_addr, u32 src_addr, u16 proto);
199extern int igmp_rcv(struct sk_buff *);
200extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
201extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);
202extern void ip_mc_drop_socket(struct sock *sk);
203extern int ip_mc_source(int add, int omode, struct sock *sk,
204 struct ip_mreq_source *mreqs, int ifindex);
205extern int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf,int ifindex);
206extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
207 struct ip_msfilter __user *optval, int __user *optlen);
208extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
209 struct group_filter __user *optval, int __user *optlen);
210extern int ip_mc_sf_allow(struct sock *sk, u32 local, u32 rmt, int dif);
211extern void ip_mr_init(void);
212extern void ip_mc_init_dev(struct in_device *);
213extern void ip_mc_destroy_dev(struct in_device *);
214extern void ip_mc_up(struct in_device *);
215extern void ip_mc_down(struct in_device *);
216extern void ip_mc_dec_group(struct in_device *in_dev, u32 addr);
217extern void ip_mc_inc_group(struct in_device *in_dev, u32 addr);
218#endif
219#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 20:46:04 -0500