Commit 102128e3 authored Jun 22, 2006 by Łukasz Stelmach Committed by David S. Miller Jun 23, 2006

[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>

parent 5b057c6b

net/ipv6/addrconf.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -862,6 +862,8 @@ static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
		* 2002::/16 2
		* ::/96 3
		* ::ffff:0:0/96 4
		* fc00::/7 5
		* 2001::/32 6
		*/
		if (type & IPV6_ADDR_LOOPBACK)
		return 0;
		@@ -869,8 +871,12 @@ static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
		return 3;
		else if (type & IPV6_ADDR_MAPPED)
		return 4;
		else if (addr->s6_addr32[0] == htonl(0x20010000))
		return 6;
		else if (addr->s6_addr16[0] == htons(0x2002))
		return 2;
		else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
		return 5;
		return 1;
		}

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