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Message-ID: <20091125135945.GA7195@amd64.fatal.se> Date: Wed, 25 Nov 2009 14:59:45 +0100 From: Andreas Henriksson <andreas@...al.se> To: netdev@...r.kernel.org Subject: Adding IP(v6) address with scope link creates global address Hello! "Jedasothi" reported problems setting scope with iproute on newly added ipv6 addresses in: https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/487745 > To reproduce bug run > ip addr add '::4/64' scope link dev eth0 > > This results in a line seen with > ip addr show eth0 > inet6 ::4/64 scope global tentative > > The label "global" is seen instead of "link". This works for me on ipv4 and seems to be only a problem with ipv6. I think this is a kernel bug. The scope seems to be passed into the kernel via netlink as specified on the command line. Looking at the kernel, inet6_rtm_newaddr [1] calls inet6_addr_add [2] without passing the ifa_scope struct member and then the scope is generated from the address within the inet6_addr_add function. It would be nice if someone could verify this and while at it also whip up a patch and forward to the right person. ;) [1]: http://lxr.linux.no/#linux+v2.6.31/net/ipv6/addrconf.c#L3263 [2]: http://lxr.linux.no/#linux+v2.6.31/net/ipv6/addrconf.c#L2081 -- Andreas Henriksson -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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