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
18enum {
19	__ND_OPT_PREFIX_INFO_END = 0,
20	ND_OPT_SOURCE_LL_ADDR = 1,	/* RFC2461 */
21	ND_OPT_TARGET_LL_ADDR = 2,	/* RFC2461 */
22	ND_OPT_PREFIX_INFO = 3,		/* RFC2461 */
23	ND_OPT_REDIRECT_HDR = 4,	/* RFC2461 */
24	ND_OPT_MTU = 5,			/* RFC2461 */
25	__ND_OPT_ARRAY_MAX,
26	ND_OPT_ROUTE_INFO = 24,		/* RFC4191 */
27	__ND_OPT_MAX
28};
29
30#define MAX_RTR_SOLICITATION_DELAY	HZ
31
32#define ND_REACHABLE_TIME		(30*HZ)
33#define ND_RETRANS_TIMER		HZ
34
35#define ND_MIN_RANDOM_FACTOR		(1/2)
36#define ND_MAX_RANDOM_FACTOR		(3/2)
37
38#ifdef __KERNEL__
39
40#include <linux/compiler.h>
41#include <linux/icmpv6.h>
42#include <linux/in6.h>
43#include <linux/types.h>
44
45#include <net/neighbour.h>
46
47struct ctl_table;
48struct file;
49struct inet6_dev;
50struct net_device;
51struct net_proto_family;
52struct sk_buff;
53
54extern struct neigh_table nd_tbl;
55
56struct nd_msg {
57        struct icmp6hdr	icmph;
58        struct in6_addr	target;
59	__u8		opt[0];
60};
61
62struct rs_msg {
63	struct icmp6hdr	icmph;
64	__u8		opt[0];
65};
66
67struct ra_msg {
68        struct icmp6hdr		icmph;
69	__be32			reachable_time;
70	__be32			retrans_timer;
71};
72
73struct nd_opt_hdr {
74	__u8		nd_opt_type;
75	__u8		nd_opt_len;
76} __attribute__((__packed__));
77
78
79extern int			ndisc_init(struct net_proto_family *ops);
80
81extern void			ndisc_cleanup(void);
82
83extern int			ndisc_rcv(struct sk_buff *skb);
84
85extern void			ndisc_send_ns(struct net_device *dev,
86					      struct neighbour *neigh,
87					      struct in6_addr *solicit,
88					      struct in6_addr *daddr,
89					      struct in6_addr *saddr);
90
91extern void			ndisc_send_rs(struct net_device *dev,
92					      struct in6_addr *saddr,
93					      struct in6_addr *daddr);
94
95extern void			ndisc_forwarding_on(void);
96extern void			ndisc_forwarding_off(void);
97
98extern void			ndisc_send_redirect(struct sk_buff *skb,
99						    struct neighbour *neigh,
100						    struct in6_addr *target);
101
102extern int			ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
103
104
105struct rt6_info *		dflt_rt_lookup(void);
106
107/*
108 *	IGMP
109 */
110extern int			igmp6_init(struct net_proto_family *ops);
111
112extern void			igmp6_cleanup(void);
113
114extern int			igmp6_event_query(struct sk_buff *skb);
115
116extern int			igmp6_event_report(struct sk_buff *skb);
117
118extern void			igmp6_cleanup(void);
119
120#ifdef CONFIG_SYSCTL
121extern int 			ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
122							   int write,
123							   struct file * filp,
124							   void __user *buffer,
125							   size_t *lenp,
126							   loff_t *ppos);
127#endif
128
129extern void 			inet6_ifinfo_notify(int event,
130						    struct inet6_dev *idev);
131
132static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
133{
134
135	if (dev)
136		return __neigh_lookup(&nd_tbl, addr, dev, 1);
137
138	return NULL;
139}
140
141
142#endif /* __KERNEL__ */
143
144
145#endif
146