Commit | Line | Data |
---|---|---|
8c14b7ce YH |
1 | /* |
2 | * IPv6 library code, needed by static components when full IPv6 support is | |
3 | * not configured or static. | |
4 | */ | |
5 | ||
bc3b2d7f | 6 | #include <linux/export.h> |
8c14b7ce | 7 | #include <net/ipv6.h> |
6da334ee | 8 | #include <net/addrconf.h> |
f39dc102 | 9 | #include <net/ip.h> |
8c14b7ce | 10 | |
705f1c86 HFS |
11 | /* if ipv6 module registers this function is used by xfrm to force all |
12 | * sockets to relookup their nodes - this is fairly expensive, be | |
13 | * careful | |
14 | */ | |
15 | void (*__fib6_flush_trees)(struct net *); | |
16 | EXPORT_SYMBOL(__fib6_flush_trees); | |
17 | ||
8c14b7ce YH |
18 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) |
19 | ||
95c96174 | 20 | static inline unsigned int ipv6_addr_scope2type(unsigned int scope) |
8c14b7ce | 21 | { |
d94d34a0 | 22 | switch (scope) { |
8c14b7ce YH |
23 | case IPV6_ADDR_SCOPE_NODELOCAL: |
24 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
25 | IPV6_ADDR_LOOPBACK); | |
26 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
27 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
28 | IPV6_ADDR_LINKLOCAL); | |
29 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
30 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
31 | IPV6_ADDR_SITELOCAL); | |
32 | } | |
33 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
34 | } | |
35 | ||
36 | int __ipv6_addr_type(const struct in6_addr *addr) | |
37 | { | |
38 | __be32 st; | |
39 | ||
40 | st = addr->s6_addr32[0]; | |
41 | ||
42 | /* Consider all addresses with the first three bits different of | |
43 | 000 and 111 as unicasts. | |
44 | */ | |
45 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
46 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
47 | return (IPV6_ADDR_UNICAST | | |
48 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
49 | ||
50 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { | |
51 | /* multicast */ | |
52 | /* addr-select 3.1 */ | |
53 | return (IPV6_ADDR_MULTICAST | | |
54 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
55 | } | |
56 | ||
57 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
58 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
59 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
60 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) | |
61 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | | |
62 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
c61a7d10 DJ |
63 | if ((st & htonl(0xFE000000)) == htonl(0xFC000000)) |
64 | return (IPV6_ADDR_UNICAST | | |
65 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* RFC 4193 */ | |
8c14b7ce YH |
66 | |
67 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
68 | if (addr->s6_addr32[2] == 0) { | |
69 | if (addr->s6_addr32[3] == 0) | |
70 | return IPV6_ADDR_ANY; | |
71 | ||
72 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
73 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | | |
74 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
75 | ||
76 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | | |
77 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
78 | } | |
79 | ||
80 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
81 | return (IPV6_ADDR_MAPPED | | |
82 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
83 | } | |
84 | ||
45bb0060 | 85 | return (IPV6_ADDR_UNICAST | |
8c14b7ce YH |
86 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ |
87 | } | |
7401055b | 88 | EXPORT_SYMBOL(__ipv6_addr_type); |
8c14b7ce | 89 | |
f88c91dd CW |
90 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
91 | ||
92 | int register_inet6addr_notifier(struct notifier_block *nb) | |
93 | { | |
94 | return atomic_notifier_chain_register(&inet6addr_chain, nb); | |
95 | } | |
96 | EXPORT_SYMBOL(register_inet6addr_notifier); | |
97 | ||
98 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
99 | { | |
100 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); | |
101 | } | |
102 | EXPORT_SYMBOL(unregister_inet6addr_notifier); | |
103 | ||
104 | int inet6addr_notifier_call_chain(unsigned long val, void *v) | |
105 | { | |
106 | return atomic_notifier_call_chain(&inet6addr_chain, val, v); | |
107 | } | |
108 | EXPORT_SYMBOL(inet6addr_notifier_call_chain); | |
5f81bd2e CW |
109 | |
110 | const struct ipv6_stub *ipv6_stub __read_mostly; | |
111 | EXPORT_SYMBOL_GPL(ipv6_stub); | |
034dfc5d CW |
112 | |
113 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
114 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
115 | EXPORT_SYMBOL(in6addr_loopback); | |
116 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
117 | EXPORT_SYMBOL(in6addr_any); | |
118 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; | |
119 | EXPORT_SYMBOL(in6addr_linklocal_allnodes); | |
120 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
121 | EXPORT_SYMBOL(in6addr_linklocal_allrouters); | |
122 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; | |
123 | EXPORT_SYMBOL(in6addr_interfacelocal_allnodes); | |
124 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; | |
125 | EXPORT_SYMBOL(in6addr_interfacelocal_allrouters); | |
126 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; | |
127 | EXPORT_SYMBOL(in6addr_sitelocal_allrouters); | |
f39dc102 CW |
128 | |
129 | static void snmp6_free_dev(struct inet6_dev *idev) | |
130 | { | |
131 | kfree(idev->stats.icmpv6msgdev); | |
132 | kfree(idev->stats.icmpv6dev); | |
698365fa | 133 | free_percpu(idev->stats.ipv6); |
f39dc102 CW |
134 | } |
135 | ||
27e41fcf RS |
136 | static void in6_dev_finish_destroy_rcu(struct rcu_head *head) |
137 | { | |
138 | struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu); | |
139 | ||
140 | snmp6_free_dev(idev); | |
141 | kfree(idev); | |
142 | } | |
143 | ||
f39dc102 CW |
144 | /* Nobody refers to this device, we may destroy it. */ |
145 | ||
146 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
147 | { | |
148 | struct net_device *dev = idev->dev; | |
149 | ||
150 | WARN_ON(!list_empty(&idev->addr_list)); | |
53b24b8f | 151 | WARN_ON(idev->mc_list); |
f39dc102 CW |
152 | WARN_ON(timer_pending(&idev->rs_timer)); |
153 | ||
154 | #ifdef NET_REFCNT_DEBUG | |
155 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); | |
156 | #endif | |
157 | dev_put(dev); | |
158 | if (!idev->dead) { | |
159 | pr_warn("Freeing alive inet6 device %p\n", idev); | |
160 | return; | |
161 | } | |
27e41fcf | 162 | call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu); |
f39dc102 CW |
163 | } |
164 | EXPORT_SYMBOL(in6_dev_finish_destroy); |