diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 90 | ||||
| -rw-r--r-- | net/ipv6/ipv6_syms.c | 2 |
2 files changed, 48 insertions, 44 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 2c5f57299d6..ff895da6395 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -35,6 +35,9 @@ * YOSHIFUJI Hideaki @USAGI : ARCnet support * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to * seq_file. + * YOSHIFUJI Hideaki @USAGI : improved source address + * selection; consider scope, + * status etc. */ #include <linux/config.h> @@ -193,46 +196,51 @@ const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; #endif const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; -int ipv6_addr_type(const struct in6_addr *addr) +#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16) + +static inline unsigned ipv6_addr_scope2type(unsigned scope) +{ + switch(scope) { + case IPV6_ADDR_SCOPE_NODELOCAL: + return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) | + IPV6_ADDR_LOOPBACK); + case IPV6_ADDR_SCOPE_LINKLOCAL: + return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) | + IPV6_ADDR_LINKLOCAL); + case IPV6_ADDR_SCOPE_SITELOCAL: + return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) | + IPV6_ADDR_SITELOCAL); + } + return IPV6_ADDR_SCOPE_TYPE(scope); +} + +int __ipv6_addr_type(const struct in6_addr *addr) { - int type; u32 st; st = addr->s6_addr32[0]; - if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { - type = IPV6_ADDR_MULTICAST; - - switch((st & htonl(0x00FF0000))) { - case __constant_htonl(0x00010000): - type |= IPV6_ADDR_LOOPBACK; - break; - - case __constant_htonl(0x00020000): - type |= IPV6_ADDR_LINKLOCAL; - break; - - case __constant_htonl(0x00050000): - type |= IPV6_ADDR_SITELOCAL; - break; - }; - return type; - } - - type = IPV6_ADDR_UNICAST; - /* Consider all addresses with the first three bits different of - 000 and 111 as finished. + 000 and 111 as unicasts. */ if ((st & htonl(0xE0000000)) != htonl(0x00000000) && (st & htonl(0xE0000000)) != htonl(0xE0000000)) - return type; - - if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) - return (IPV6_ADDR_LINKLOCAL | type); + return (IPV6_ADDR_UNICAST | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); + if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { + /* multicast */ + /* addr-select 3.1 */ + return (IPV6_ADDR_MULTICAST | + ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr))); + } + + if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) + return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */ if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) - return (IPV6_ADDR_SITELOCAL | type); + return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */ if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { if (addr->s6_addr32[2] == 0) { @@ -240,24 +248,20 @@ int ipv6_addr_type(const struct in6_addr *addr) return IPV6_ADDR_ANY; if (addr->s6_addr32[3] == htonl(0x00000001)) - return (IPV6_ADDR_LOOPBACK | type); + return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */ - return (IPV6_ADDR_COMPATv4 | type); + return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ } if (addr->s6_addr32[2] == htonl(0x0000ffff)) - return IPV6_ADDR_MAPPED; - } - - st &= htonl(0xFF000000); - if (st == 0) - return IPV6_ADDR_RESERVED; - st &= htonl(0xFE000000); - if (st == htonl(0x02000000)) - return IPV6_ADDR_RESERVED; /* for NSAP */ - if (st == htonl(0x04000000)) - return IPV6_ADDR_RESERVED; /* for IPX */ - return type; + return (IPV6_ADDR_MAPPED | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */ + } + + return (IPV6_ADDR_RESERVED | + IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */ } static void addrconf_del_timer(struct inet6_ifaddr *ifp) diff --git a/net/ipv6/ipv6_syms.c b/net/ipv6/ipv6_syms.c index 37a4a99c9fe..16482785bdf 100644 --- a/net/ipv6/ipv6_syms.c +++ b/net/ipv6/ipv6_syms.c @@ -7,7 +7,7 @@ #include <net/ip6_route.h> #include <net/xfrm.h> -EXPORT_SYMBOL(ipv6_addr_type); +EXPORT_SYMBOL(__ipv6_addr_type); EXPORT_SYMBOL(icmpv6_send); EXPORT_SYMBOL(icmpv6_statistics); EXPORT_SYMBOL(icmpv6_err_convert); |