]>
Commit | Line | Data |
---|---|---|
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> | |
30f2a5f3 DM |
50 | #include <linux/if_arp.h> |
51 | #include <linux/netdevice.h> | |
b14f243a | 52 | #include <linux/hash.h> |
14c85021 | 53 | |
1da177e4 | 54 | #include <net/neighbour.h> |
14c85021 ACM |
55 | |
56 | struct ctl_table; | |
14c85021 ACM |
57 | struct inet6_dev; |
58 | struct net_device; | |
59 | struct net_proto_family; | |
60 | struct sk_buff; | |
1da177e4 LT |
61 | |
62 | extern struct neigh_table nd_tbl; | |
63 | ||
64 | struct nd_msg { | |
65 | struct icmp6hdr icmph; | |
66 | struct in6_addr target; | |
67 | __u8 opt[0]; | |
68 | }; | |
69 | ||
70 | struct rs_msg { | |
71 | struct icmp6hdr icmph; | |
72 | __u8 opt[0]; | |
73 | }; | |
74 | ||
75 | struct ra_msg { | |
76 | struct icmp6hdr icmph; | |
e69a4adc AV |
77 | __be32 reachable_time; |
78 | __be32 retrans_timer; | |
1da177e4 LT |
79 | }; |
80 | ||
81 | struct nd_opt_hdr { | |
82 | __u8 nd_opt_type; | |
83 | __u8 nd_opt_len; | |
bc10502d | 84 | } __packed; |
1da177e4 | 85 | |
30f2a5f3 DM |
86 | /* ND options */ |
87 | struct ndisc_options { | |
88 | struct nd_opt_hdr *nd_opt_array[__ND_OPT_ARRAY_MAX]; | |
89 | #ifdef CONFIG_IPV6_ROUTE_INFO | |
90 | struct nd_opt_hdr *nd_opts_ri; | |
91 | struct nd_opt_hdr *nd_opts_ri_end; | |
92 | #endif | |
93 | struct nd_opt_hdr *nd_useropts; | |
94 | struct nd_opt_hdr *nd_useropts_end; | |
95 | }; | |
96 | ||
97 | #define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR] | |
98 | #define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR] | |
99 | #define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO] | |
100 | #define nd_opts_pi_end nd_opt_array[__ND_OPT_PREFIX_INFO_END] | |
101 | #define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR] | |
102 | #define nd_opts_mtu nd_opt_array[ND_OPT_MTU] | |
103 | ||
104 | #define NDISC_OPT_SPACE(len) (((len)+2+7)&~7) | |
105 | ||
106 | extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, | |
107 | struct ndisc_options *ndopts); | |
108 | ||
109 | /* | |
110 | * Return the padding between the option length and the start of the | |
111 | * link addr. Currently only IP-over-InfiniBand needs this, although | |
112 | * if RFC 3831 IPv6-over-Fibre Channel is ever implemented it may | |
113 | * also need a pad of 2. | |
114 | */ | |
115 | static int ndisc_addr_option_pad(unsigned short type) | |
116 | { | |
117 | switch (type) { | |
118 | case ARPHRD_INFINIBAND: return 2; | |
119 | default: return 0; | |
120 | } | |
121 | } | |
122 | ||
123 | static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p, | |
124 | struct net_device *dev) | |
125 | { | |
126 | u8 *lladdr = (u8 *)(p + 1); | |
127 | int lladdrlen = p->nd_opt_len << 3; | |
128 | int prepad = ndisc_addr_option_pad(dev->type); | |
129 | if (lladdrlen != NDISC_OPT_SPACE(dev->addr_len + prepad)) | |
130 | return NULL; | |
131 | return lladdr + prepad; | |
132 | } | |
133 | ||
2c2aba6c DM |
134 | static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, __u32 *hash_rnd) |
135 | { | |
136 | const u32 *p32 = pkey; | |
137 | ||
b14f243a | 138 | return (((p32[0] ^ hash32_ptr(dev)) * hash_rnd[0]) + |
2c2aba6c DM |
139 | (p32[1] * hash_rnd[1]) + |
140 | (p32[2] * hash_rnd[2]) + | |
141 | (p32[3] * hash_rnd[3])); | |
142 | } | |
1da177e4 | 143 | |
f83c7790 DM |
144 | static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey) |
145 | { | |
146 | struct neigh_hash_table *nht; | |
147 | const u32 *p32 = pkey; | |
148 | struct neighbour *n; | |
149 | u32 hash_val; | |
150 | ||
151 | rcu_read_lock_bh(); | |
152 | nht = rcu_dereference_bh(tbl->nht); | |
153 | hash_val = ndisc_hashfn(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift); | |
154 | for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]); | |
155 | n != NULL; | |
156 | n = rcu_dereference_bh(n->next)) { | |
157 | u32 *n32 = (u32 *) n->primary_key; | |
158 | if (n->dev == dev && | |
159 | ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) | | |
160 | (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0) { | |
161 | if (!atomic_inc_not_zero(&n->refcnt)) | |
162 | n = NULL; | |
163 | break; | |
164 | } | |
165 | } | |
166 | rcu_read_unlock_bh(); | |
167 | ||
168 | return n; | |
169 | } | |
170 | ||
9b0f976f | 171 | extern int ndisc_init(void); |
1da177e4 LT |
172 | |
173 | extern void ndisc_cleanup(void); | |
174 | ||
175 | extern int ndisc_rcv(struct sk_buff *skb); | |
176 | ||
177 | extern void ndisc_send_ns(struct net_device *dev, | |
178 | struct neighbour *neigh, | |
9acd9f3a YH |
179 | const struct in6_addr *solicit, |
180 | const struct in6_addr *daddr, | |
181 | const struct in6_addr *saddr); | |
1da177e4 LT |
182 | |
183 | extern void ndisc_send_rs(struct net_device *dev, | |
9acd9f3a YH |
184 | const struct in6_addr *saddr, |
185 | const struct in6_addr *daddr); | |
1da177e4 | 186 | |
1da177e4 | 187 | extern void ndisc_send_redirect(struct sk_buff *skb, |
9acd9f3a | 188 | const struct in6_addr *target); |
1da177e4 | 189 | |
b71d1d42 ED |
190 | extern int ndisc_mc_map(const struct in6_addr *addr, char *buf, |
191 | struct net_device *dev, int dir); | |
1da177e4 | 192 | |
1da177e4 LT |
193 | |
194 | /* | |
195 | * IGMP | |
196 | */ | |
9b0f976f | 197 | extern int igmp6_init(void); |
1da177e4 LT |
198 | |
199 | extern void igmp6_cleanup(void); | |
200 | ||
201 | extern int igmp6_event_query(struct sk_buff *skb); | |
202 | ||
203 | extern int igmp6_event_report(struct sk_buff *skb); | |
204 | ||
1da177e4 LT |
205 | |
206 | #ifdef CONFIG_SYSCTL | |
14c85021 | 207 | extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, |
1da177e4 | 208 | int write, |
1da177e4 LT |
209 | void __user *buffer, |
210 | size_t *lenp, | |
211 | loff_t *ppos); | |
f221e726 AD |
212 | int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, |
213 | void __user *oldval, size_t __user *oldlenp, | |
0686caa3 | 214 | void __user *newval, size_t newlen); |
1da177e4 LT |
215 | #endif |
216 | ||
217 | extern void inet6_ifinfo_notify(int event, | |
218 | struct inet6_dev *idev); | |
219 | ||
1da177e4 | 220 | #endif |