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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
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020045#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/icmpv6.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020047#include <linux/in6.h>
48#include <linux/types.h>
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <net/neighbour.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020051
52struct ctl_table;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020053struct inet6_dev;
54struct net_device;
55struct net_proto_family;
56struct sk_buff;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58extern struct neigh_table nd_tbl;
59
60struct nd_msg {
61 struct icmp6hdr icmph;
62 struct in6_addr target;
63 __u8 opt[0];
64};
65
66struct rs_msg {
67 struct icmp6hdr icmph;
68 __u8 opt[0];
69};
70
71struct ra_msg {
72 struct icmp6hdr icmph;
Al Viroe69a4ad2006-11-14 20:56:00 -080073 __be32 reachable_time;
74 __be32 retrans_timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075};
76
77struct nd_opt_hdr {
78 __u8 nd_opt_type;
79 __u8 nd_opt_len;
Eric Dumazetbc105022010-06-03 03:21:52 -070080} __packed;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82
Denis V. Lunev9b0f9762008-02-29 11:13:15 -080083extern int ndisc_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85extern void ndisc_cleanup(void);
86
87extern int ndisc_rcv(struct sk_buff *skb);
88
89extern void ndisc_send_ns(struct net_device *dev,
90 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090091 const struct in6_addr *solicit,
92 const struct in6_addr *daddr,
93 const struct in6_addr *saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95extern void ndisc_send_rs(struct net_device *dev,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +090096 const struct in6_addr *saddr,
97 const struct in6_addr *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Linus Torvalds1da177e2005-04-16 15:20:36 -070099extern void ndisc_send_redirect(struct sk_buff *skb,
100 struct neighbour *neigh,
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900101 const struct in6_addr *target);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000103extern int ndisc_mc_map(const struct in6_addr *addr, char *buf,
104 struct net_device *dev, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Brian Haley305d5522008-11-04 17:51:14 -0800106extern struct sk_buff *ndisc_build_skb(struct net_device *dev,
107 const struct in6_addr *daddr,
108 const struct in6_addr *saddr,
109 struct icmp6hdr *icmp6h,
110 const struct in6_addr *target,
111 int llinfo);
112
113extern void ndisc_send_skb(struct sk_buff *skb,
114 struct net_device *dev,
115 struct neighbour *neigh,
116 const struct in6_addr *daddr,
117 const struct in6_addr *saddr,
118 struct icmp6hdr *icmp6h);
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122/*
123 * IGMP
124 */
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800125extern int igmp6_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127extern void igmp6_cleanup(void);
128
129extern int igmp6_event_query(struct sk_buff *skb);
130
131extern int igmp6_event_report(struct sk_buff *skb);
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134#ifdef CONFIG_SYSCTL
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200135extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 void __user *buffer,
138 size_t *lenp,
139 loff_t *ppos);
Alexey Dobriyanf221e722008-10-15 22:04:23 -0700140int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
141 void __user *oldval, size_t __user *oldlenp,
YOSHIFUJI Hideaki0686caa2008-05-19 16:25:42 -0700142 void __user *newval, size_t newlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143#endif
144
145extern void inet6_ifinfo_notify(int event,
146 struct inet6_dev *idev);
147
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900148static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
150
151 if (dev)
David S. Miller14deae42009-01-04 16:04:39 -0800152 return __neigh_lookup_errno(&nd_tbl, addr, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
David S. Miller14deae42009-01-04 16:04:39 -0800154 return ERR_PTR(-ENODEV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155}
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#endif