1 #ifndef _NDISC_H
2 #define _NDISC_H
3
4 /*
5 * ICMP codes for neighbour discovery messages
6 */
7
8 #define NDISC_ROUTER_SOLICITATION 133
9 #define NDISC_ROUTER_ADVERTISEMENT 134
10 #define NDISC_NEIGHBOUR_SOLICITATION 135
11 #define NDISC_NEIGHBOUR_ADVERTISEMENT 136
12 #define NDISC_REDIRECT 137
13
14 /*
15 * ndisc options
16 */
17
18 #define ND_OPT_SOURCE_LL_ADDR 1
19 #define ND_OPT_TARGET_LL_ADDR 2
20 #define ND_OPT_PREFIX_INFO 3
21 #define ND_OPT_REDIRECT_HDR 4
22 #define ND_OPT_MTU 5
23
24 #define MAX_RTR_SOLICITATION_DELAY HZ
25
26 #define ND_REACHABLE_TIME (30*HZ)
27 #define ND_RETRANS_TIMER HZ
28
29 #define ND_MIN_RANDOM_FACTOR (1/2)
30 #define ND_MAX_RANDOM_FACTOR (3/2)
31
32 #ifdef __KERNEL__
33
34 #include <linux/skbuff.h>
35 #include <linux/netdevice.h>
36 #include <linux/icmpv6.h>
37 #include <net/neighbour.h>
38 #include <asm/atomic.h>
39
40 extern struct neigh_table nd_tbl;
41
42 struct nd_msg {
43 struct icmp6hdr icmph;
44 struct in6_addr target;
45 struct {
46 __u8 opt_type;
47 __u8 opt_len;
48 __u8 link_addr[MAX_ADDR_LEN];
49 } opt;
50 };
51
52 struct ra_msg {
53 struct icmp6hdr icmph;
54 __u32 reachable_time;
55 __u32 retrans_timer;
56 };
57
58
59 extern int ndisc_init(struct net_proto_family *ops);
60
61 extern void ndisc_cleanup(void);
62
63 extern int ndisc_rcv(struct sk_buff *skb, unsigned long len);
64
65 extern void ndisc_send_ns(struct net_device *dev,
66 struct neighbour *neigh,
67 struct in6_addr *solicit,
68 struct in6_addr *daddr,
69 struct in6_addr *saddr);
70
71 extern void ndisc_send_rs(struct net_device *dev,
72 struct in6_addr *saddr,
73 struct in6_addr *daddr);
74
75 extern void ndisc_forwarding_on(void);
76 extern void ndisc_forwarding_off(void);
77
78 extern void ndisc_send_redirect(struct sk_buff *skb,
79 struct neighbour *neigh,
80 struct in6_addr *target);
81
82 extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
83
84
85 struct rt6_info * dflt_rt_lookup(void);
86
87 /*
88 * IGMP
89 */
90 extern int igmp6_init(struct net_proto_family *ops);
91
92 extern void igmp6_cleanup(void);
93
94 extern int igmp6_event_query(struct sk_buff *skb,
95 struct icmp6hdr *hdr,
96 int len);
97
98 extern int igmp6_event_report(struct sk_buff *skb,
99 struct icmp6hdr *hdr,
100 int len);
101
102 extern void igmp6_cleanup(void);
103
104 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
105 {
106
107 if (dev)
108 return __neigh_lookup(&nd_tbl, addr, dev, 1);
109
110 return NULL;
111 }
112
113
114 #endif /* __KERNEL__ */
115
116
117 #endif
118
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