Commit | Line | Data |
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1da177e4 LT |
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 | ||
fadf6bf0 TF |
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 | ||
1da177e4 LT |
23 | /* |
24 | * ndisc options | |
25 | */ | |
26 | ||
27 | enum { | |
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 */ | |
70ceb4f5 YH |
34 | __ND_OPT_ARRAY_MAX, |
35 | ND_OPT_ROUTE_INFO = 24, /* RFC4191 */ | |
31910575 | 36 | ND_OPT_RDNSS = 25, /* RFC5006 */ |
e35f30c1 | 37 | ND_OPT_DNSSL = 31, /* RFC6106 */ |
1da177e4 LT |
38 | __ND_OPT_MAX |
39 | }; | |
40 | ||
41 | #define MAX_RTR_SOLICITATION_DELAY HZ | |
42 | ||
43 | #define ND_REACHABLE_TIME (30*HZ) | |
44 | #define ND_RETRANS_TIMER HZ | |
45 | ||
14c85021 | 46 | #include <linux/compiler.h> |
1da177e4 | 47 | #include <linux/icmpv6.h> |
14c85021 ACM |
48 | #include <linux/in6.h> |
49 | #include <linux/types.h> | |
50 | ||
1da177e4 | 51 | #include <net/neighbour.h> |
14c85021 ACM |
52 | |
53 | struct ctl_table; | |
14c85021 ACM |
54 | struct inet6_dev; |
55 | struct net_device; | |
56 | struct net_proto_family; | |
57 | struct sk_buff; | |
1da177e4 LT |
58 | |
59 | extern struct neigh_table nd_tbl; | |
60 | ||
61 | struct nd_msg { | |
62 | struct icmp6hdr icmph; | |
63 | struct in6_addr target; | |
64 | __u8 opt[0]; | |
65 | }; | |
66 | ||
67 | struct rs_msg { | |
68 | struct icmp6hdr icmph; | |
69 | __u8 opt[0]; | |
70 | }; | |
71 | ||
72 | struct ra_msg { | |
73 | struct icmp6hdr icmph; | |
e69a4adc AV |
74 | __be32 reachable_time; |
75 | __be32 retrans_timer; | |
1da177e4 LT |
76 | }; |
77 | ||
78 | struct nd_opt_hdr { | |
79 | __u8 nd_opt_type; | |
80 | __u8 nd_opt_len; | |
bc10502d | 81 | } __packed; |
1da177e4 | 82 | |
2c2aba6c DM |
83 | static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, __u32 *hash_rnd) |
84 | { | |
85 | const u32 *p32 = pkey; | |
86 | ||
87 | return (((p32[0] ^ dev->ifindex) * hash_rnd[0]) + | |
88 | (p32[1] * hash_rnd[1]) + | |
89 | (p32[2] * hash_rnd[2]) + | |
90 | (p32[3] * hash_rnd[3])); | |
91 | } | |
1da177e4 | 92 | |
f83c7790 DM |
93 | static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey) |
94 | { | |
95 | struct neigh_hash_table *nht; | |
96 | const u32 *p32 = pkey; | |
97 | struct neighbour *n; | |
98 | u32 hash_val; | |
99 | ||
100 | rcu_read_lock_bh(); | |
101 | nht = rcu_dereference_bh(tbl->nht); | |
102 | hash_val = ndisc_hashfn(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift); | |
103 | for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]); | |
104 | n != NULL; | |
105 | n = rcu_dereference_bh(n->next)) { | |
106 | u32 *n32 = (u32 *) n->primary_key; | |
107 | if (n->dev == dev && | |
108 | ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) | | |
109 | (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0) { | |
110 | if (!atomic_inc_not_zero(&n->refcnt)) | |
111 | n = NULL; | |
112 | break; | |
113 | } | |
114 | } | |
115 | rcu_read_unlock_bh(); | |
116 | ||
117 | return n; | |
118 | } | |
119 | ||
9b0f976f | 120 | extern int ndisc_init(void); |
1da177e4 LT |
121 | |
122 | extern void ndisc_cleanup(void); | |
123 | ||
124 | extern int ndisc_rcv(struct sk_buff *skb); | |
125 | ||
126 | extern void ndisc_send_ns(struct net_device *dev, | |
127 | struct neighbour *neigh, | |
9acd9f3a YH |
128 | const struct in6_addr *solicit, |
129 | const struct in6_addr *daddr, | |
130 | const struct in6_addr *saddr); | |
1da177e4 LT |
131 | |
132 | extern void ndisc_send_rs(struct net_device *dev, | |
9acd9f3a YH |
133 | const struct in6_addr *saddr, |
134 | const struct in6_addr *daddr); | |
1da177e4 | 135 | |
1da177e4 | 136 | extern void ndisc_send_redirect(struct sk_buff *skb, |
9acd9f3a | 137 | const struct in6_addr *target); |
1da177e4 | 138 | |
b71d1d42 ED |
139 | extern int ndisc_mc_map(const struct in6_addr *addr, char *buf, |
140 | struct net_device *dev, int dir); | |
1da177e4 | 141 | |
305d552a BH |
142 | extern struct sk_buff *ndisc_build_skb(struct net_device *dev, |
143 | const struct in6_addr *daddr, | |
144 | const struct in6_addr *saddr, | |
145 | struct icmp6hdr *icmp6h, | |
146 | const struct in6_addr *target, | |
147 | int llinfo); | |
148 | ||
149 | extern void ndisc_send_skb(struct sk_buff *skb, | |
150 | struct net_device *dev, | |
151 | struct neighbour *neigh, | |
152 | const struct in6_addr *daddr, | |
153 | const struct in6_addr *saddr, | |
154 | struct icmp6hdr *icmp6h); | |
155 | ||
1da177e4 | 156 | |
1da177e4 LT |
157 | |
158 | /* | |
159 | * IGMP | |
160 | */ | |
9b0f976f | 161 | extern int igmp6_init(void); |
1da177e4 LT |
162 | |
163 | extern void igmp6_cleanup(void); | |
164 | ||
165 | extern int igmp6_event_query(struct sk_buff *skb); | |
166 | ||
167 | extern int igmp6_event_report(struct sk_buff *skb); | |
168 | ||
1da177e4 LT |
169 | |
170 | #ifdef CONFIG_SYSCTL | |
14c85021 | 171 | extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, |
1da177e4 | 172 | int write, |
1da177e4 LT |
173 | void __user *buffer, |
174 | size_t *lenp, | |
175 | loff_t *ppos); | |
f221e726 AD |
176 | int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, |
177 | void __user *oldval, size_t __user *oldlenp, | |
0686caa3 | 178 | void __user *newval, size_t newlen); |
1da177e4 LT |
179 | #endif |
180 | ||
181 | extern void inet6_ifinfo_notify(int event, | |
182 | struct inet6_dev *idev); | |
183 | ||
1da177e4 | 184 | #endif |