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#ifdef __KERNEL__
46
47#include <linux/compiler.h>
48#include <linux/icmpv6.h>
49#include <linux/in6.h>
50#include <linux/types.h>
51
52#include <net/neighbour.h>
53
54struct ctl_table;
55struct inet6_dev;
56struct net_device;
57struct net_proto_family;
58struct sk_buff;
59
60extern struct neigh_table nd_tbl;
61
62struct nd_msg {
63 struct icmp6hdr icmph;
64 struct in6_addr target;
65 __u8 opt[0];
66};
67
68struct rs_msg {
69 struct icmp6hdr icmph;
70 __u8 opt[0];
71};
72
73struct ra_msg {
74 struct icmp6hdr icmph;
75 __be32 reachable_time;
76 __be32 retrans_timer;
77};
78
79struct nd_opt_hdr {
80 __u8 nd_opt_type;
81 __u8 nd_opt_len;
82} __packed;
83
84
85extern int ndisc_init(void);
86
87extern void ndisc_cleanup(void);
88
89extern int ndisc_rcv(struct sk_buff *skb);
90
91extern void ndisc_send_ns(struct net_device *dev,
92 struct neighbour *neigh,
93 const struct in6_addr *solicit,
94 const struct in6_addr *daddr,
95 const struct in6_addr *saddr);
96
97extern void ndisc_send_rs(struct net_device *dev,
98 const struct in6_addr *saddr,
99 const struct in6_addr *daddr);
100
101extern void ndisc_send_redirect(struct sk_buff *skb,
102 struct neighbour *neigh,
103 const struct in6_addr *target);
104
105extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
106
107extern struct sk_buff *ndisc_build_skb(struct net_device *dev,
108 const struct in6_addr *daddr,
109 const struct in6_addr *saddr,
110 struct icmp6hdr *icmp6h,
111 const struct in6_addr *target,
112 int llinfo);
113
114extern void ndisc_send_skb(struct sk_buff *skb,
115 struct net_device *dev,
116 struct neighbour *neigh,
117 const struct in6_addr *daddr,
118 const struct in6_addr *saddr,
119 struct icmp6hdr *icmp6h);
120
121
122
123/*
124 * IGMP
125 */
126extern int igmp6_init(void);
127
128extern void igmp6_cleanup(void);
129
130extern int igmp6_event_query(struct sk_buff *skb);
131
132extern int igmp6_event_report(struct sk_buff *skb);
133
134
135#ifdef CONFIG_SYSCTL
136extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
137 int write,
138 void __user *buffer,
139 size_t *lenp,
140 loff_t *ppos);
141int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
142 void __user *oldval, size_t __user *oldlenp,
143 void __user *newval, size_t newlen);
144#endif
145
146extern void inet6_ifinfo_notify(int event,
147 struct inet6_dev *idev);
148
149static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
150{
151
152 if (dev)
153 return __neigh_lookup_errno(&nd_tbl, addr, dev);
154
155 return ERR_PTR(-ENODEV);
156}
157
158
159#endif /* __KERNEL__ */
160
161
162#endif