1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16#ifndef _LINUX_IGMP_H
17#define _LINUX_IGMP_H
18
19#include <asm/byteorder.h>
20
21
22
23
24
25
26
27
28
29struct igmphdr
30{
31 __u8 type;
32 __u8 code;
33 __sum16 csum;
34 __be32 group;
35};
36
37
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#ifdef __KERNEL__
84#include <linux/skbuff.h>
85
86static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)
87{
88 return (struct igmphdr *)skb_transport_header(skb);
89}
90
91static inline struct igmpv3_report *
92 igmpv3_report_hdr(const struct sk_buff *skb)
93{
94 return (struct igmpv3_report *)skb_transport_header(skb);
95}
96
97static inline struct igmpv3_query *
98 igmpv3_query_hdr(const struct sk_buff *skb)
99{
100 return (struct igmpv3_query *)skb_transport_header(skb);
101}
102#endif
103
104#define IGMP_HOST_MEMBERSHIP_QUERY 0x11
105#define IGMP_HOST_MEMBERSHIP_REPORT 0x12
106#define IGMP_DVMRP 0x13
107#define IGMP_PIM 0x14
108#define IGMP_TRACE 0x15
109#define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16
110#define IGMP_HOST_LEAVE_MESSAGE 0x17
111#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22
112
113#define IGMP_MTRACE_RESP 0x1e
114#define IGMP_MTRACE 0x1f
115
116
117
118
119
120
121#define IGMP_DELAYING_MEMBER 0x01
122#define IGMP_IDLE_MEMBER 0x02
123#define IGMP_LAZY_MEMBER 0x03
124#define IGMP_SLEEPING_MEMBER 0x04
125#define IGMP_AWAKENING_MEMBER 0x05
126
127#define IGMP_MINLEN 8
128
129#define IGMP_MAX_HOST_REPORT_DELAY 10
130
131
132#define IGMP_TIMER_SCALE 10
133
134
135#define IGMP_AGE_THRESHOLD 400
136
137
138
139#define IGMP_ALL_HOSTS htonl(0xE0000001L)
140#define IGMP_ALL_ROUTER htonl(0xE0000002L)
141#define IGMPV3_ALL_MCR htonl(0xE0000016L)
142#define IGMP_LOCAL_GROUP htonl(0xE0000000L)
143#define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L)
144
145
146
147
148
149#ifdef __KERNEL__
150#include <linux/skbuff.h>
151#include <linux/timer.h>
152#include <linux/in.h>
153
154extern int sysctl_igmp_max_memberships;
155extern int sysctl_igmp_max_msf;
156
157struct ip_sf_socklist
158{
159 unsigned int sl_max;
160 unsigned int sl_count;
161 __be32 sl_addr[0];
162};
163
164#define IP_SFLSIZE(count) (sizeof(struct ip_sf_socklist) + \
165 (count) * sizeof(__be32))
166
167#define IP_SFBLOCK 10
168
169
170
171
172
173struct ip_mc_socklist
174{
175 struct ip_mc_socklist *next;
176 struct ip_mreqn multi;
177 unsigned int sfmode;
178 struct ip_sf_socklist *sflist;
179};
180
181struct ip_sf_list
182{
183 struct ip_sf_list *sf_next;
184 __be32 sf_inaddr;
185 unsigned long sf_count[2];
186 unsigned char sf_gsresp;
187 unsigned char sf_oldin;
188 unsigned char sf_crcount;
189};
190
191struct ip_mc_list
192{
193 struct in_device *interface;
194 __be32 multiaddr;
195 struct ip_sf_list *sources;
196 struct ip_sf_list *tomb;
197 unsigned int sfmode;
198 unsigned long sfcount[2];
199 struct ip_mc_list *next;
200 struct timer_list timer;
201 int users;
202 atomic_t refcnt;
203 spinlock_t lock;
204 char tm_running;
205 char reporter;
206 char unsolicit_count;
207 char loaded;
208 unsigned char gsquery;
209 unsigned char crcount;
210};
211
212
213#define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
214#define IGMPV3_EXP(thresh, nbmant, nbexp, value) \
215 ((value) < (thresh) ? (value) : \
216 ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant))) << \
217 (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
218
219#define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)
220#define IGMPV3_MRC(value) IGMPV3_EXP(0x80, 4, 3, value)
221
222extern int ip_check_mc(struct in_device *dev, __be32 mc_addr, __be32 src_addr, u16 proto);
223extern int igmp_rcv(struct sk_buff *);
224extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
225extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);
226extern void ip_mc_drop_socket(struct sock *sk);
227extern int ip_mc_source(int add, int omode, struct sock *sk,
228 struct ip_mreq_source *mreqs, int ifindex);
229extern int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf,int ifindex);
230extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
231 struct ip_msfilter __user *optval, int __user *optlen);
232extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
233 struct group_filter __user *optval, int __user *optlen);
234extern int ip_mc_sf_allow(struct sock *sk, __be32 local, __be32 rmt, int dif);
235extern void ip_mr_init(void);
236extern void ip_mc_init_dev(struct in_device *);
237extern void ip_mc_destroy_dev(struct in_device *);
238extern void ip_mc_up(struct in_device *);
239extern void ip_mc_down(struct in_device *);
240extern void ip_mc_dec_group(struct in_device *in_dev, __be32 addr);
241extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr);
242extern void ip_mc_rejoin_group(struct ip_mc_list *im);
243
244#endif
245#endif
246
