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
18#define ND_OPT_SOURCE_LL_ADDR		1
19#define ND_OPT_TARGET_LL_ADDR		2
20#define ND_OPT_PREFIX_INFO		3
21#define ND_OPT_REDIRECT_HDR		4
22#define ND_OPT_MTU			5
23
24#define MAX_RTR_SOLICITATION_DELAY	HZ
25
26#define ND_REACHABLE_TIME		(30*HZ)
27#define ND_RETRANS_TIMER		HZ
28
29#define ND_MIN_RANDOM_FACTOR		(1/2)
30#define ND_MAX_RANDOM_FACTOR		(3/2)
31
32#ifdef __KERNEL__
33
34#include <linux/skbuff.h>
35#include <linux/netdevice.h>
36#include <linux/icmpv6.h>
37#include <net/neighbour.h>
38#include <asm/atomic.h>
39
40extern struct neigh_table nd_tbl;
41
42struct nd_msg {
43        struct icmp6hdr	icmph;
44        struct in6_addr	target;
45	__u8		opt[0];
46};
47
48struct ra_msg {
49        struct icmp6hdr		icmph;
50	__u32			reachable_time;
51	__u32			retrans_timer;
52};
53
54struct nd_opt_hdr {
55	__u8		nd_opt_type;
56	__u8		nd_opt_len;
57} __attribute__((__packed__));
58
59struct ndisc_options {
60	struct nd_opt_hdr *nd_opt_array[7];
61	struct nd_opt_hdr *nd_opt_piend;
62};
63
64#define nd_opts_src_lladdr	nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
65#define nd_opts_tgt_lladdr	nd_opt_array[ND_OPT_TARGET_LL_ADDR]
66#define nd_opts_pi		nd_opt_array[ND_OPT_PREFIX_INFO]
67#define nd_opts_pi_end		nd_opt_piend
68#define nd_opts_rh		nd_opt_array[ND_OPT_REDIRECT_HDR]
69#define nd_opts_mtu		nd_opt_array[ND_OPT_MTU]
70
71extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end);
72extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts);
73
74extern int			ndisc_init(struct net_proto_family *ops);
75
76extern void			ndisc_cleanup(void);
77
78extern int			ndisc_rcv(struct sk_buff *skb);
79
80extern void			ndisc_send_ns(struct net_device *dev,
81					      struct neighbour *neigh,
82					      struct in6_addr *solicit,
83					      struct in6_addr *daddr,
84					      struct in6_addr *saddr);
85
86extern void			ndisc_send_rs(struct net_device *dev,
87					      struct in6_addr *saddr,
88					      struct in6_addr *daddr);
89
90extern void			ndisc_forwarding_on(void);
91extern void			ndisc_forwarding_off(void);
92
93extern void			ndisc_send_redirect(struct sk_buff *skb,
94						    struct neighbour *neigh,
95						    struct in6_addr *target);
96
97extern int			ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
98
99
100struct rt6_info *		dflt_rt_lookup(void);
101
102/*
103 *	IGMP
104 */
105extern int			igmp6_init(struct net_proto_family *ops);
106
107extern void			igmp6_cleanup(void);
108
109extern int			igmp6_event_query(struct sk_buff *skb);
110
111extern int			igmp6_event_report(struct sk_buff *skb);
112
113extern void			igmp6_cleanup(void);
114
115static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
116{
117
118	if (dev)
119		return __neigh_lookup(&nd_tbl, addr, dev, 1);
120
121	return NULL;
122}
123
124
125#endif /* __KERNEL__ */
126
127
128#endif
129