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authorŁukasz Stelmach <stlman@poczta.fm>2006-06-22 04:37:19 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-23 05:07:22 -0400
commit102128e3a27821bdcbacb10f4f2bba253f587ba4 (patch)
treebbde6e385045eea27c5e8aeae051ac420a5cda92 /net/ipv6/addrconf.c
parent5b057c6b1a25d57edf2b4d1e956e50936480a9ff (diff)
[IPV6]: Fix source address selection.
Two additional labels (RFC 3484, sec. 10.3) for IPv6 addreses are defined to make a distinction between global unicast addresses and Unique Local Addresses (fc00::/7, RFC 4193) and Teredo (2001::/32, RFC 4380). It is necessary to avoid attempts of connection that would either fail (eg. fec0:: to 2001:feed::) or be sub-optimal (2001:0:: to 2001:feed::). Signed-off-by: Łukasz Stelmach <stlman@poczta.fm> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c2c26fa0943d..6b361fc3e14d 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -862,6 +862,8 @@ static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
862 * 2002::/16 2 862 * 2002::/16 2
863 * ::/96 3 863 * ::/96 3
864 * ::ffff:0:0/96 4 864 * ::ffff:0:0/96 4
865 * fc00::/7 5
866 * 2001::/32 6
865 */ 867 */
866 if (type & IPV6_ADDR_LOOPBACK) 868 if (type & IPV6_ADDR_LOOPBACK)
867 return 0; 869 return 0;
@@ -869,8 +871,12 @@ static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
869 return 3; 871 return 3;
870 else if (type & IPV6_ADDR_MAPPED) 872 else if (type & IPV6_ADDR_MAPPED)
871 return 4; 873 return 4;
874 else if (addr->s6_addr32[0] == htonl(0x20010000))
875 return 6;
872 else if (addr->s6_addr16[0] == htons(0x2002)) 876 else if (addr->s6_addr16[0] == htons(0x2002))
873 return 2; 877 return 2;
878 else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
879 return 5;
874 return 1; 880 return 1;
875} 881}
876 882