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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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/*
Templin, Fred Lfadf6bf2008-03-11 18:35:59 -040015 * 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/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * ndisc options
25 */
26
27enum {
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 */
YOSHIFUJI Hideaki70ceb4f2006-03-20 17:06:24 -080034 __ND_OPT_ARRAY_MAX,
35 ND_OPT_ROUTE_INFO = 24, /* RFC4191 */
Pierre Ynard31910572007-10-10 21:22:05 -070036 ND_OPT_RDNSS = 25, /* RFC5006 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 __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
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020050#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/icmpv6.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020052#include <linux/in6.h>
53#include <linux/types.h>
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <net/neighbour.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020056
57struct ctl_table;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020058struct inet6_dev;
59struct net_device;
60struct net_proto_family;
61struct sk_buff;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63extern struct neigh_table nd_tbl;
64
65struct nd_msg {
66 struct icmp6hdr icmph;
67 struct in6_addr target;
68 __u8 opt[0];
69};
70
71struct rs_msg {
72 struct icmp6hdr icmph;
73 __u8 opt[0];
74};
75
76struct ra_msg {
77 struct icmp6hdr icmph;
Al Viroe69a4ad2006-11-14 20:56:00 -080078 __be32 reachable_time;
79 __be32 retrans_timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82struct nd_opt_hdr {
83 __u8 nd_opt_type;
84 __u8 nd_opt_len;
85} __attribute__((__packed__));
86
87
Denis V. Lunev9b0f9762008-02-29 11:13:15 -080088extern int ndisc_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90extern void ndisc_cleanup(void);
91
92extern int ndisc_rcv(struct sk_buff *skb);
93
94extern void ndisc_send_ns(struct net_device *dev,
95 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090096 const struct in6_addr *solicit,
97 const struct in6_addr *daddr,
98 const struct in6_addr *saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100extern void ndisc_send_rs(struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900101 const struct in6_addr *saddr,
102 const struct in6_addr *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104extern void ndisc_send_redirect(struct sk_buff *skb,
105 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900106 const struct in6_addr *target);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
109
Brian Haley305d5522008-11-04 17:51:14 -0800110extern struct sk_buff *ndisc_build_skb(struct net_device *dev,
111 const struct in6_addr *daddr,
112 const struct in6_addr *saddr,
113 struct icmp6hdr *icmp6h,
114 const struct in6_addr *target,
115 int llinfo);
116
117extern void ndisc_send_skb(struct sk_buff *skb,
118 struct net_device *dev,
119 struct neighbour *neigh,
120 const struct in6_addr *daddr,
121 const struct in6_addr *saddr,
122 struct icmp6hdr *icmp6h);
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126/*
127 * IGMP
128 */
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800129extern int igmp6_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131extern void igmp6_cleanup(void);
132
133extern int igmp6_event_query(struct sk_buff *skb);
134
135extern int igmp6_event_report(struct sk_buff *skb);
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138#ifdef CONFIG_SYSCTL
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200139extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 void __user *buffer,
142 size_t *lenp,
143 loff_t *ppos);
Alexey Dobriyanf221e722008-10-15 22:04:23 -0700144int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
145 void __user *oldval, size_t __user *oldlenp,
YOSHIFUJI Hideaki0686caa2008-05-19 16:25:42 -0700146 void __user *newval, size_t newlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147#endif
148
149extern void inet6_ifinfo_notify(int event,
150 struct inet6_dev *idev);
151
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900152static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
154
155 if (dev)
David S. Miller14deae42009-01-04 16:04:39 -0800156 return __neigh_lookup_errno(&nd_tbl, addr, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
David S. Miller14deae42009-01-04 16:04:39 -0800158 return ERR_PTR(-ENODEV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159}
160
161
162#endif /* __KERNEL__ */
163
164
165#endif