blob: 1459ed3e2697b495bb37226c8190b7f81d428c3c [file] [log] [blame]
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;
58struct file;
59struct inet6_dev;
60struct net_device;
61struct net_proto_family;
62struct sk_buff;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64extern struct neigh_table nd_tbl;
65
66struct nd_msg {
67 struct icmp6hdr icmph;
68 struct in6_addr target;
69 __u8 opt[0];
70};
71
72struct rs_msg {
73 struct icmp6hdr icmph;
74 __u8 opt[0];
75};
76
77struct ra_msg {
78 struct icmp6hdr icmph;
Al Viroe69a4adc2006-11-14 20:56:00 -080079 __be32 reachable_time;
80 __be32 retrans_timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081};
82
83struct nd_opt_hdr {
84 __u8 nd_opt_type;
85 __u8 nd_opt_len;
86} __attribute__((__packed__));
87
88
Denis V. Lunev9b0f9762008-02-29 11:13:15 -080089extern int ndisc_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91extern void ndisc_cleanup(void);
92
93extern int ndisc_rcv(struct sk_buff *skb);
94
95extern void ndisc_send_ns(struct net_device *dev,
96 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090097 const struct in6_addr *solicit,
98 const struct in6_addr *daddr,
99 const struct in6_addr *saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101extern void ndisc_send_rs(struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900102 const struct in6_addr *saddr,
103 const struct in6_addr *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105extern void ndisc_send_redirect(struct sk_buff *skb,
106 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900107 const struct in6_addr *target);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
110
Brian Haley305d5522008-11-04 17:51:14 -0800111extern struct sk_buff *ndisc_build_skb(struct net_device *dev,
112 const struct in6_addr *daddr,
113 const struct in6_addr *saddr,
114 struct icmp6hdr *icmp6h,
115 const struct in6_addr *target,
116 int llinfo);
117
118extern void ndisc_send_skb(struct sk_buff *skb,
119 struct net_device *dev,
120 struct neighbour *neigh,
121 const struct in6_addr *daddr,
122 const struct in6_addr *saddr,
123 struct icmp6hdr *icmp6h);
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127/*
128 * IGMP
129 */
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800130extern int igmp6_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132extern void igmp6_cleanup(void);
133
134extern int igmp6_event_query(struct sk_buff *skb);
135
136extern int igmp6_event_report(struct sk_buff *skb);
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139#ifdef CONFIG_SYSCTL
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200140extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 int write,
142 struct file * filp,
143 void __user *buffer,
144 size_t *lenp,
145 loff_t *ppos);
Alexey Dobriyanf221e722008-10-15 22:04:23 -0700146int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
147 void __user *oldval, size_t __user *oldlenp,
YOSHIFUJI Hideaki0686caa2008-05-19 16:25:42 -0700148 void __user *newval, size_t newlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#endif
150
151extern void inet6_ifinfo_notify(int event,
152 struct inet6_dev *idev);
153
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900154static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155{
156
157 if (dev)
David S. Miller14deae42009-01-04 16:04:39 -0800158 return __neigh_lookup_errno(&nd_tbl, addr, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
David S. Miller14deae42009-01-04 16:04:39 -0800160 return ERR_PTR(-ENODEV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161}
162
163
164#endif /* __KERNEL__ */
165
166
167#endif