tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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#define ND_MIN_RANDOM_FACTOR (1/2)
46#define ND_MAX_RANDOM_FACTOR (3/2)
47
48#ifdef __KERNEL__
49
50#include <linux/compiler.h>
51#include <linux/icmpv6.h>
52#include <linux/in6.h>
53#include <linux/types.h>
54
55#include <net/neighbour.h>
56
57struct ctl_table;
58struct file;
59struct inet6_dev;
60struct net_device;
61struct net_proto_family;
62struct sk_buff;
63
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;
79 __be32 reachable_time;
80 __be32 retrans_timer;
81};
82
83struct nd_opt_hdr {
84 __u8 nd_opt_type;
85 __u8 nd_opt_len;
86} __attribute__((__packed__));
87
88
89extern int ndisc_init(void);
90
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,
97 const struct in6_addr *solicit,
98 const struct in6_addr *daddr,
99 const struct in6_addr *saddr);
100
101extern void ndisc_send_rs(struct net_device *dev,
102 const struct in6_addr *saddr,
103 const struct in6_addr *daddr);
104
105extern void ndisc_send_redirect(struct sk_buff *skb,
106 struct neighbour *neigh,
107 const struct in6_addr *target);
108
109extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
110
111extern 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
125
126
127/*
128 * IGMP
129 */
130extern int igmp6_init(void);
131
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
138
139#ifdef CONFIG_SYSCTL
140extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
141 int write,
142 struct file * filp,
143 void __user *buffer,
144 size_t *lenp,
145 loff_t *ppos);
146int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
147 void __user *oldval, size_t __user *oldlenp,
148 void __user *newval, size_t newlen);
149#endif
150
151extern void inet6_ifinfo_notify(int event,
152 struct inet6_dev *idev);
153
154static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
155{
156
157 if (dev)
158 return __neigh_lookup_errno(&nd_tbl, addr, dev);
159
160 return ERR_PTR(-ENODEV);
161}
162
163
164#endif /* __KERNEL__ */
165
166
167#endif