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 * 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_MAX
26};
27
28#define MAX_RTR_SOLICITATION_DELAY HZ
29
30#define ND_REACHABLE_TIME (30*HZ)
31#define ND_RETRANS_TIMER HZ
32
33#define ND_MIN_RANDOM_FACTOR (1/2)
34#define ND_MAX_RANDOM_FACTOR (3/2)
35
36#ifdef __KERNEL__
37
38#include <linux/skbuff.h>
39#include <linux/netdevice.h>
40#include <linux/icmpv6.h>
41#include <net/neighbour.h>
42#include <asm/atomic.h>
43
44extern struct neigh_table nd_tbl;
45
46struct nd_msg {
47 struct icmp6hdr icmph;
48 struct in6_addr target;
49 __u8 opt[0];
50};
51
52struct rs_msg {
53 struct icmp6hdr icmph;
54 __u8 opt[0];
55};
56
57struct ra_msg {
58 struct icmp6hdr icmph;
59 __u32 reachable_time;
60 __u32 retrans_timer;
61};
62
63struct nd_opt_hdr {
64 __u8 nd_opt_type;
65 __u8 nd_opt_len;
66} __attribute__((__packed__));
67
68
69extern int ndisc_init(struct net_proto_family *ops);
70
71extern void ndisc_cleanup(void);
72
73extern int ndisc_rcv(struct sk_buff *skb);
74
75extern void ndisc_send_ns(struct net_device *dev,
76 struct neighbour *neigh,
77 struct in6_addr *solicit,
78 struct in6_addr *daddr,
79 struct in6_addr *saddr);
80
81extern void ndisc_send_rs(struct net_device *dev,
82 struct in6_addr *saddr,
83 struct in6_addr *daddr);
84
85extern void ndisc_forwarding_on(void);
86extern void ndisc_forwarding_off(void);
87
88extern void ndisc_send_redirect(struct sk_buff *skb,
89 struct neighbour *neigh,
90 struct in6_addr *target);
91
92extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
93
94
95struct rt6_info * dflt_rt_lookup(void);
96
97/*
98 * IGMP
99 */
100extern int igmp6_init(struct net_proto_family *ops);
101
102extern void igmp6_cleanup(void);
103
104extern int igmp6_event_query(struct sk_buff *skb);
105
106extern int igmp6_event_report(struct sk_buff *skb);
107
108extern void igmp6_cleanup(void);
109
110#ifdef CONFIG_SYSCTL
111extern int ndisc_ifinfo_sysctl_change(ctl_table *ctl,
112 int write,
113 struct file * filp,
114 void __user *buffer,
115 size_t *lenp,
116 loff_t *ppos);
117#endif
118
119extern void inet6_ifinfo_notify(int event,
120 struct inet6_dev *idev);
121
122static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
123{
124
125 if (dev)
126 return __neigh_lookup(&nd_tbl, addr, dev, 1);
127
128 return NULL;
129}
130
131
132#endif /* __KERNEL__ */
133
134
135#endif