* kernel bug 14839
@ 2010-12-17 15:18 Ian Shorter
2010-12-17 15:31 ` David Lamparter
0 siblings, 1 reply; 2+ messages in thread
From: Ian Shorter @ 2010-12-17 15:18 UTC (permalink / raw)
To: netdev
At the end of 2009 I reported kernel bug 14839: "Trying to use a TUN device for IPv6 traffic, cannot set destination address". I was wondering whether any progress has been made towards resolving the problem? Regards.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: kernel bug 14839
2010-12-17 15:18 kernel bug 14839 Ian Shorter
@ 2010-12-17 15:31 ` David Lamparter
0 siblings, 0 replies; 2+ messages in thread
From: David Lamparter @ 2010-12-17 15:31 UTC (permalink / raw)
To: Ian Shorter; +Cc: netdev
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On Fri, Dec 17, 2010 at 07:18:58AM -0800, Ian Shorter wrote:
> At the end of 2009 I reported kernel bug 14839: "Trying to use a TUN
> device for IPv6 traffic, cannot set destination address". I was
> wondering whether any progress has been made towards resolving the
> problem? Regards.
The bug is invalid. You are incorrectly assuming the IPv4 pattern of a
"local" and a "remote" address applies to IPv6. Also, you are
incorrectly using an fe80:: address with a /128 mask. (fe80:: with
anything but /64 is usually gross mis-setup)
Please change the application to do the following:
* add a fe80::/64 address to the tun device
* use either device-only routes ("2001:db8::/32 dev tun0") or get the
peer link-local address (might be complicated) and use that as
nexthop.
-David
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