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16#ifndef _LINUX_IGMP_H
17#define _LINUX_IGMP_H
18
19#include <linux/types.h>
20#include <asm/byteorder.h>
21
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29
30struct igmphdr {
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#define IGMP_HOST_MEMBERSHIP_QUERY 0x11
84#define IGMP_HOST_MEMBERSHIP_REPORT 0x12
85#define IGMP_DVMRP 0x13
86#define IGMP_PIM 0x14
87#define IGMP_TRACE 0x15
88#define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16
89#define IGMP_HOST_LEAVE_MESSAGE 0x17
90#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22
91
92#define IGMP_MTRACE_RESP 0x1e
93#define IGMP_MTRACE 0x1f
94
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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
109
110
111#define IGMP_TIMER_SCALE 10
112
113
114#define IGMP_AGE_THRESHOLD 400
115
116
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
126
127
128#ifdef __KERNEL__
129#include <linux/skbuff.h>
130#include <linux/timer.h>
131#include <linux/in.h>
132
133static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)
134{
135 return (struct igmphdr *)skb_transport_header(skb);
136}
137
138static inline struct igmpv3_report *
139 igmpv3_report_hdr(const struct sk_buff *skb)
140{
141 return (struct igmpv3_report *)skb_transport_header(skb);
142}
143
144static inline struct igmpv3_query *
145 igmpv3_query_hdr(const struct sk_buff *skb)
146{
147 return (struct igmpv3_query *)skb_transport_header(skb);
148}
149
150extern int sysctl_igmp_max_memberships;
151extern int sysctl_igmp_max_msf;
152
153struct ip_sf_socklist {
154 unsigned int sl_max;
155 unsigned int sl_count;
156 struct rcu_head rcu;
157 __be32 sl_addr[0];
158};
159
160#define IP_SFLSIZE(count) (sizeof(struct ip_sf_socklist) + \
161 (count) * sizeof(__be32))
162
163#define IP_SFBLOCK 10
164
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167
168
169struct ip_mc_socklist {
170 struct ip_mc_socklist __rcu *next_rcu;
171 struct ip_mreqn multi;
172 unsigned int sfmode;
173 struct ip_sf_socklist __rcu *sflist;
174 struct rcu_head rcu;
175};
176
177struct ip_sf_list {
178 struct ip_sf_list *sf_next;
179 __be32 sf_inaddr;
180 unsigned long sf_count[2];
181 unsigned char sf_gsresp;
182 unsigned char sf_oldin;
183 unsigned char sf_crcount;
184};
185
186struct ip_mc_list {
187 struct in_device *interface;
188 __be32 multiaddr;
189 unsigned int sfmode;
190 struct ip_sf_list *sources;
191 struct ip_sf_list *tomb;
192 unsigned long sfcount[2];
193 union {
194 struct ip_mc_list *next;
195 struct ip_mc_list __rcu *next_rcu;
196 };
197 struct timer_list timer;
198 int users;
199 atomic_t refcnt;
200 spinlock_t lock;
201 char tm_running;
202 char reporter;
203 char unsolicit_count;
204 char loaded;
205 unsigned char gsquery;
206 unsigned char crcount;
207 struct rcu_head rcu;
208};
209
210
211#define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
212#define IGMPV3_EXP(thresh, nbmant, nbexp, value) \
213 ((value) < (thresh) ? (value) : \
214 ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant))) << \
215 (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
216
217#define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)
218#define IGMPV3_MRC(value) IGMPV3_EXP(0x80, 4, 3, value)
219
220extern int ip_check_mc_rcu(struct in_device *dev, __be32 mc_addr, __be32 src_addr, u16 proto);
221extern int igmp_rcv(struct sk_buff *);
222extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
223extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);
224extern void ip_mc_drop_socket(struct sock *sk);
225extern int ip_mc_source(int add, int omode, struct sock *sk,
226 struct ip_mreq_source *mreqs, int ifindex);
227extern int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf,int ifindex);
228extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
229 struct ip_msfilter __user *optval, int __user *optlen);
230extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
231 struct group_filter __user *optval, int __user *optlen);
232extern int ip_mc_sf_allow(struct sock *sk, __be32 local, __be32 rmt, int dif);
233extern void ip_mc_init_dev(struct in_device *);
234extern void ip_mc_destroy_dev(struct in_device *);
235extern void ip_mc_up(struct in_device *);
236extern void ip_mc_down(struct in_device *);
237extern void ip_mc_unmap(struct in_device *);
238extern void ip_mc_remap(struct in_device *);
239extern void ip_mc_dec_group(struct in_device *in_dev, __be32 addr);
240extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr);
241extern void ip_mc_rejoin_groups(struct in_device *in_dev);
242
243#endif
244#endif
245
