On Fri, 22 Apr 2005 01:53:43 +0200
Patrick McHardy [off-list ref] wrote:

Yes, tmpl->id.daddr might be 0, in which case the destination
of the packet or previous tunnel mode transforms is used. daddr
always contains the correct adress, so we should use it to check
for duplicate SPIs. But as Herbert noted, we shouldn't perform
the check if tmpl->id.spi == 0, so here is a new patch.

Signed-off-by: Patrick McHardy <redacted>

Ok, that makes sense.  Patch applied, thanks guys.