From: Maciej Żenczykowski <redacted>
Date: Mon, 27 Sep 2010 03:05:57 -0700

From: Maciej Żenczykowski <redacted>

Signed-off-by: Maciej Żenczykowski <redacted>

Please handle all 4 cases just like the ipv4 routing code does:

{ saddr = SADDR, ifindex = dev->ifindex }
{ saddr = SADDR, ifindex = 0 }
{ saddr = INADDR_ANY, ifindex = dev->ifindex }
{ saddr = INADDR_ANY, ifindex = 0 }

I believe I've specifically asked for this every time someone
mentioned that they wanted to fix this issue.

And the ipv4 side is a good guide in other ways, it uses a set
of two arrays so you can just loop over them, making your
rt6_do_pmtu_disc() calls along the way.