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 YH |
10 | |
11 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) | |
12 | ||
95c96174 | 13 | static inline unsigned int ipv6_addr_scope2type(unsigned int scope) |
8c14b7ce | 14 | { |
d94d34a0 | 15 | switch (scope) { |
8c14b7ce YH |
16 | case IPV6_ADDR_SCOPE_NODELOCAL: |
17 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
18 | IPV6_ADDR_LOOPBACK); | |
19 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
20 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
21 | IPV6_ADDR_LINKLOCAL); | |
22 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
23 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
24 | IPV6_ADDR_SITELOCAL); | |
25 | } | |
26 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
27 | } | |
28 | ||
29 | int __ipv6_addr_type(const struct in6_addr *addr) | |
30 | { | |
31 | __be32 st; | |
32 | ||
33 | st = addr->s6_addr32[0]; | |
34 | ||
35 | /* Consider all addresses with the first three bits different of | |
36 | 000 and 111 as unicasts. | |
37 | */ | |
38 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
39 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
40 | return (IPV6_ADDR_UNICAST | | |
41 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
42 | ||
43 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { | |
44 | /* multicast */ | |
45 | /* addr-select 3.1 */ | |
46 | return (IPV6_ADDR_MULTICAST | | |
47 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
48 | } | |
49 | ||
50 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
51 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
52 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
53 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) | |
54 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | | |
55 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
c61a7d10 DJ |
56 | if ((st & htonl(0xFE000000)) == htonl(0xFC000000)) |
57 | return (IPV6_ADDR_UNICAST | | |
58 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* RFC 4193 */ | |
8c14b7ce YH |
59 | |
60 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
61 | if (addr->s6_addr32[2] == 0) { | |
62 | if (addr->s6_addr32[3] == 0) | |
63 | return IPV6_ADDR_ANY; | |
64 | ||
65 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
66 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | | |
67 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
68 | ||
69 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | | |
70 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
71 | } | |
72 | ||
73 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
74 | return (IPV6_ADDR_MAPPED | | |
75 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
76 | } | |
77 | ||
45bb0060 | 78 | return (IPV6_ADDR_UNICAST | |
8c14b7ce YH |
79 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ |
80 | } | |
7401055b | 81 | EXPORT_SYMBOL(__ipv6_addr_type); |
8c14b7ce | 82 | |
f88c91dd CW |
83 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
84 | ||
85 | int register_inet6addr_notifier(struct notifier_block *nb) | |
86 | { | |
87 | return atomic_notifier_chain_register(&inet6addr_chain, nb); | |
88 | } | |
89 | EXPORT_SYMBOL(register_inet6addr_notifier); | |
90 | ||
91 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
92 | { | |
93 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); | |
94 | } | |
95 | EXPORT_SYMBOL(unregister_inet6addr_notifier); | |
96 | ||
97 | int inet6addr_notifier_call_chain(unsigned long val, void *v) | |
98 | { | |
99 | return atomic_notifier_call_chain(&inet6addr_chain, val, v); | |
100 | } | |
101 | EXPORT_SYMBOL(inet6addr_notifier_call_chain); | |
5f81bd2e CW |
102 | |
103 | const struct ipv6_stub *ipv6_stub __read_mostly; | |
104 | EXPORT_SYMBOL_GPL(ipv6_stub); | |
034dfc5d CW |
105 | |
106 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
107 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; | |
108 | EXPORT_SYMBOL(in6addr_loopback); | |
109 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; | |
110 | EXPORT_SYMBOL(in6addr_any); | |
111 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; | |
112 | EXPORT_SYMBOL(in6addr_linklocal_allnodes); | |
113 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
114 | EXPORT_SYMBOL(in6addr_linklocal_allrouters); | |
115 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; | |
116 | EXPORT_SYMBOL(in6addr_interfacelocal_allnodes); | |
117 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; | |
118 | EXPORT_SYMBOL(in6addr_interfacelocal_allrouters); | |
119 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; | |
120 | EXPORT_SYMBOL(in6addr_sitelocal_allrouters); | |
f39dc102 CW |
121 | |
122 | static void snmp6_free_dev(struct inet6_dev *idev) | |
123 | { | |
124 | kfree(idev->stats.icmpv6msgdev); | |
125 | kfree(idev->stats.icmpv6dev); | |
698365fa | 126 | free_percpu(idev->stats.ipv6); |
f39dc102 CW |
127 | } |
128 | ||
129 | /* Nobody refers to this device, we may destroy it. */ | |
130 | ||
131 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
132 | { | |
133 | struct net_device *dev = idev->dev; | |
134 | ||
135 | WARN_ON(!list_empty(&idev->addr_list)); | |
136 | WARN_ON(idev->mc_list != NULL); | |
137 | WARN_ON(timer_pending(&idev->rs_timer)); | |
138 | ||
139 | #ifdef NET_REFCNT_DEBUG | |
140 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); | |
141 | #endif | |
142 | dev_put(dev); | |
143 | if (!idev->dead) { | |
144 | pr_warn("Freeing alive inet6 device %p\n", idev); | |
145 | return; | |
146 | } | |
147 | snmp6_free_dev(idev); | |
148 | kfree_rcu(idev, rcu); | |
149 | } | |
150 | EXPORT_SYMBOL(in6_dev_finish_destroy); |