a01b7c4dc76371dba52e2aebac23ae254238b6e5
[linux-2.6.git] / include / net / ndisc.h
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  * Router type: cross-layer information from link-layer to
16  * IPv6 layer reported by certain link types (e.g., RFC4214).
17  */
18 #define NDISC_NODETYPE_UNSPEC           0       /* unspecified (default) */
19 #define NDISC_NODETYPE_HOST             1       /* host or unauthorized router */
20 #define NDISC_NODETYPE_NODEFAULT        2       /* non-default router */
21 #define NDISC_NODETYPE_DEFAULT          3       /* default router */
22
23 /*
24  *      ndisc options
25  */
26
27 enum {
28         __ND_OPT_PREFIX_INFO_END = 0,
29         ND_OPT_SOURCE_LL_ADDR = 1,      /* RFC2461 */
30         ND_OPT_TARGET_LL_ADDR = 2,      /* RFC2461 */
31         ND_OPT_PREFIX_INFO = 3,         /* RFC2461 */
32         ND_OPT_REDIRECT_HDR = 4,        /* RFC2461 */
33         ND_OPT_MTU = 5,                 /* RFC2461 */
34         __ND_OPT_ARRAY_MAX,
35         ND_OPT_ROUTE_INFO = 24,         /* RFC4191 */
36         ND_OPT_RDNSS = 25,              /* RFC5006 */
37         __ND_OPT_MAX
38 };
39
40 #define MAX_RTR_SOLICITATION_DELAY      HZ
41
42 #define ND_REACHABLE_TIME               (30*HZ)
43 #define ND_RETRANS_TIMER                HZ
44
45 #define ND_MIN_RANDOM_FACTOR            (1/2)
46 #define ND_MAX_RANDOM_FACTOR            (3/2)
47
48 #ifdef __KERNEL__
49
50 #include <linux/compiler.h>
51 #include <linux/icmpv6.h>
52 #include <linux/in6.h>
53 #include <linux/types.h>
54
55 #include <net/neighbour.h>
56
57 struct ctl_table;
58 struct file;
59 struct inet6_dev;
60 struct net_device;
61 struct net_proto_family;
62 struct sk_buff;
63
64 extern struct neigh_table nd_tbl;
65
66 struct nd_msg {
67         struct icmp6hdr icmph;
68         struct in6_addr target;
69         __u8            opt[0];
70 };
71
72 struct rs_msg {
73         struct icmp6hdr icmph;
74         __u8            opt[0];
75 };
76
77 struct ra_msg {
78         struct icmp6hdr         icmph;
79         __be32                  reachable_time;
80         __be32                  retrans_timer;
81 };
82
83 struct nd_opt_hdr {
84         __u8            nd_opt_type;
85         __u8            nd_opt_len;
86 } __attribute__((__packed__));
87
88
89 extern int                      ndisc_init(void);
90
91 extern void                     ndisc_cleanup(void);
92
93 extern int                      ndisc_rcv(struct sk_buff *skb);
94
95 extern void                     ndisc_send_ns(struct net_device *dev,
96                                               struct neighbour *neigh,
97                                               const struct in6_addr *solicit,
98                                               const struct in6_addr *daddr,
99                                               const struct in6_addr *saddr);
100
101 extern void                     ndisc_send_rs(struct net_device *dev,
102                                               const struct in6_addr *saddr,
103                                               const struct in6_addr *daddr);
104
105 extern void                     ndisc_send_redirect(struct sk_buff *skb,
106                                                     struct neighbour *neigh,
107                                                     const struct in6_addr *target);
108
109 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
110
111
112
113 /*
114  *      IGMP
115  */
116 extern int                      igmp6_init(void);
117
118 extern void                     igmp6_cleanup(void);
119
120 extern int                      igmp6_event_query(struct sk_buff *skb);
121
122 extern int                      igmp6_event_report(struct sk_buff *skb);
123
124
125 #ifdef CONFIG_SYSCTL
126 extern int                      ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
127                                                            int write,
128                                                            struct file * filp,
129                                                            void __user *buffer,
130                                                            size_t *lenp,
131                                                            loff_t *ppos);
132 int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name,
133                                  int nlen, void __user *oldval,
134                                  size_t __user *oldlenp,
135                                  void __user *newval, size_t newlen);
136 #endif
137
138 extern void                     inet6_ifinfo_notify(int event,
139                                                     struct inet6_dev *idev);
140
141 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
142 {
143
144         if (dev)
145                 return __neigh_lookup(&nd_tbl, addr, dev, 1);
146
147         return NULL;
148 }
149
150
151 #endif /* __KERNEL__ */
152
153
154 #endif