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10#ifndef _LINUX_IGMP_H
11#define _LINUX_IGMP_H
12
13#include <linux/skbuff.h>
14#include <linux/timer.h>
15#include <linux/in.h>
16#include <linux/ip.h>
17#include <linux/refcount.h>
18#include <uapi/linux/igmp.h>
19
20static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)
21{
22 return (struct igmphdr *)skb_transport_header(skb);
23}
24
25static inline struct igmpv3_report *
26 igmpv3_report_hdr(const struct sk_buff *skb)
27{
28 return (struct igmpv3_report *)skb_transport_header(skb);
29}
30
31static inline struct igmpv3_query *
32 igmpv3_query_hdr(const struct sk_buff *skb)
33{
34 return (struct igmpv3_query *)skb_transport_header(skb);
35}
36
37struct ip_sf_socklist {
38 unsigned int sl_max;
39 unsigned int sl_count;
40 struct rcu_head rcu;
41 __be32 sl_addr[0];
42};
43
44#define IP_SFLSIZE(count) (sizeof(struct ip_sf_socklist) + \
45 (count) * sizeof(__be32))
46
47#define IP_SFBLOCK 10
48
49
50
51
52
53struct ip_mc_socklist {
54 struct ip_mc_socklist __rcu *next_rcu;
55 struct ip_mreqn multi;
56 unsigned int sfmode;
57 struct ip_sf_socklist __rcu *sflist;
58 struct rcu_head rcu;
59};
60
61struct ip_sf_list {
62 struct ip_sf_list *sf_next;
63 unsigned long sf_count[2];
64 __be32 sf_inaddr;
65 unsigned char sf_gsresp;
66 unsigned char sf_oldin;
67 unsigned char sf_crcount;
68};
69
70struct ip_mc_list {
71 struct in_device *interface;
72 __be32 multiaddr;
73 unsigned int sfmode;
74 struct ip_sf_list *sources;
75 struct ip_sf_list *tomb;
76 unsigned long sfcount[2];
77 union {
78 struct ip_mc_list *next;
79 struct ip_mc_list __rcu *next_rcu;
80 };
81 struct ip_mc_list __rcu *next_hash;
82 struct timer_list timer;
83 int users;
84 refcount_t refcnt;
85 spinlock_t lock;
86 char tm_running;
87 char reporter;
88 char unsolicit_count;
89 char loaded;
90 unsigned char gsquery;
91 unsigned char crcount;
92 struct rcu_head rcu;
93};
94
95
96#define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
97#define IGMPV3_EXP(thresh, nbmant, nbexp, value) \
98 ((value) < (thresh) ? (value) : \
99 ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant))) << \
100 (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
101
102#define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)
103#define IGMPV3_MRC(value) IGMPV3_EXP(0x80, 4, 3, value)
104
105static inline int ip_mc_may_pull(struct sk_buff *skb, unsigned int len)
106{
107 if (skb_transport_offset(skb) + ip_transport_len(skb) < len)
108 return 0;
109
110 return pskb_may_pull(skb, len);
111}
112
113extern int ip_check_mc_rcu(struct in_device *dev, __be32 mc_addr, __be32 src_addr, u8 proto);
114extern int igmp_rcv(struct sk_buff *);
115extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
116extern int ip_mc_join_group_ssm(struct sock *sk, struct ip_mreqn *imr,
117 unsigned int mode);
118extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);
119extern void ip_mc_drop_socket(struct sock *sk);
120extern int ip_mc_source(int add, int omode, struct sock *sk,
121 struct ip_mreq_source *mreqs, int ifindex);
122extern int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf,int ifindex);
123extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
124 struct ip_msfilter __user *optval, int __user *optlen);
125extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
126 struct group_filter __user *optval, int __user *optlen);
127extern int ip_mc_sf_allow(struct sock *sk, __be32 local, __be32 rmt,
128 int dif, int sdif);
129extern void ip_mc_init_dev(struct in_device *);
130extern void ip_mc_destroy_dev(struct in_device *);
131extern void ip_mc_up(struct in_device *);
132extern void ip_mc_down(struct in_device *);
133extern void ip_mc_unmap(struct in_device *);
134extern void ip_mc_remap(struct in_device *);
135extern void __ip_mc_dec_group(struct in_device *in_dev, __be32 addr, gfp_t gfp);
136static inline void ip_mc_dec_group(struct in_device *in_dev, __be32 addr)
137{
138 return __ip_mc_dec_group(in_dev, addr, GFP_KERNEL);
139}
140extern void __ip_mc_inc_group(struct in_device *in_dev, __be32 addr,
141 gfp_t gfp);
142extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr);
143int ip_mc_check_igmp(struct sk_buff *skb);
144
145#endif
146