projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| 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 YH |
7 | #include <net/ipv6.h> |
| 8 | ||
| 9 | #define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) | |
| 10 | ||
| 95c96174 | 11 | static inline unsigned int ipv6_addr_scope2type(unsigned int scope) |
| 8c14b7ce | 12 | { |
| d94d34a0 | 13 | switch (scope) { |
| 8c14b7ce YH |
14 | case IPV6_ADDR_SCOPE_NODELOCAL: |
| 15 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | | |
| 16 | IPV6_ADDR_LOOPBACK); | |
| 17 | case IPV6_ADDR_SCOPE_LINKLOCAL: | |
| 18 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | | |
| 19 | IPV6_ADDR_LINKLOCAL); | |
| 20 | case IPV6_ADDR_SCOPE_SITELOCAL: | |
| 21 | return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | | |
| 22 | IPV6_ADDR_SITELOCAL); | |
| 23 | } | |
| 24 | return IPV6_ADDR_SCOPE_TYPE(scope); | |
| 25 | } | |
| 26 | ||
| 27 | int __ipv6_addr_type(const struct in6_addr *addr) | |
| 28 | { | |
| 29 | __be32 st; | |
| 30 | ||
| 31 | st = addr->s6_addr32[0]; | |
| 32 | ||
| 33 | /* Consider all addresses with the first three bits different of | |
| 34 | 000 and 111 as unicasts. | |
| 35 | */ | |
| 36 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && | |
| 37 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) | |
| 38 | return (IPV6_ADDR_UNICAST | | |
| 39 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); | |
| 40 | ||
| 41 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { | |
| 42 | /* multicast */ | |
| 43 | /* addr-select 3.1 */ | |
| 44 | return (IPV6_ADDR_MULTICAST | | |
| 45 | ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); | |
| 46 | } | |
| 47 | ||
| 48 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) | |
| 49 | return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | | |
| 50 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ | |
| 51 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) | |
| 52 | return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | | |
| 53 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ | |
| c61a7d10 DJ |
54 | if ((st & htonl(0xFE000000)) == htonl(0xFC000000)) |
| 55 | return (IPV6_ADDR_UNICAST | | |
| 56 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* RFC 4193 */ | |
| 8c14b7ce YH |
57 | |
| 58 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { | |
| 59 | if (addr->s6_addr32[2] == 0) { | |
| 60 | if (addr->s6_addr32[3] == 0) | |
| 61 | return IPV6_ADDR_ANY; | |
| 62 | ||
| 63 | if (addr->s6_addr32[3] == htonl(0x00000001)) | |
| 64 | return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | | |
| 65 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ | |
| 66 | ||
| 67 | return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | | |
| 68 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
| 69 | } | |
| 70 | ||
| 71 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) | |
| 72 | return (IPV6_ADDR_MAPPED | | |
| 73 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ | |
| 74 | } | |
| 75 | ||
| 45bb0060 | 76 | return (IPV6_ADDR_UNICAST | |
| 8c14b7ce YH |
77 | IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ |
| 78 | } | |
| 7401055b | 79 | EXPORT_SYMBOL(__ipv6_addr_type); |
| 8c14b7ce | 80 | |
| f88c91dd CW |
81 | static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); |
| 82 | ||
| 83 | int register_inet6addr_notifier(struct notifier_block *nb) | |
| 84 | { | |
| 85 | return atomic_notifier_chain_register(&inet6addr_chain, nb); | |
| 86 | } | |
| 87 | EXPORT_SYMBOL(register_inet6addr_notifier); | |
| 88 | ||
| 89 | int unregister_inet6addr_notifier(struct notifier_block *nb) | |
| 90 | { | |
| 91 | return atomic_notifier_chain_unregister(&inet6addr_chain, nb); | |
| 92 | } | |
| 93 | EXPORT_SYMBOL(unregister_inet6addr_notifier); | |
| 94 | ||
| 95 | int inet6addr_notifier_call_chain(unsigned long val, void *v) | |
| 96 | { | |
| 97 | return atomic_notifier_call_chain(&inet6addr_chain, val, v); | |
| 98 | } | |
| 99 | EXPORT_SYMBOL(inet6addr_notifier_call_chain); |