Linux kernel mirror (for testing)
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linux
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 * 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/*
24 * 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 */
34 __ND_OPT_ARRAY_MAX,
35 ND_OPT_ROUTE_INFO = 24, /* RFC4191 */
36 ND_OPT_RDNSS = 25, /* RFC5006 */
37 __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#include <linux/compiler.h>
46#include <linux/icmpv6.h>
47#include <linux/in6.h>
48#include <linux/types.h>
49
50#include <net/neighbour.h>
51
52struct ctl_table;
53struct inet6_dev;
54struct net_device;
55struct net_proto_family;
56struct sk_buff;
57
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;
73 __be32 reachable_time;
74 __be32 retrans_timer;
75};
76
77struct nd_opt_hdr {
78 __u8 nd_opt_type;
79 __u8 nd_opt_len;
80} __packed;
81
82
83extern int ndisc_init(void);
84
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,
91 const struct in6_addr *solicit,
92 const struct in6_addr *daddr,
93 const struct in6_addr *saddr);
94
95extern void ndisc_send_rs(struct net_device *dev,
96 const struct in6_addr *saddr,
97 const struct in6_addr *daddr);
98
99extern void ndisc_send_redirect(struct sk_buff *skb,
100 struct neighbour *neigh,
101 const struct in6_addr *target);
102
103extern int ndisc_mc_map(const struct in6_addr *addr, char *buf,
104 struct net_device *dev, int dir);
105
106extern 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
120
121
122/*
123 * IGMP
124 */
125extern int igmp6_init(void);
126
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
133
134#ifdef CONFIG_SYSCTL
135extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
136 int write,
137 void __user *buffer,
138 size_t *lenp,
139 loff_t *ppos);
140int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
141 void __user *oldval, size_t __user *oldlenp,
142 void __user *newval, size_t newlen);
143#endif
144
145extern void inet6_ifinfo_notify(int event,
146 struct inet6_dev *idev);
147
148static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
149{
150
151 if (dev)
152 return __neigh_lookup_errno(&nd_tbl, addr, dev);
153
154 return ERR_PTR(-ENODEV);
155}
156
157#endif