kern/61215: off-by-one error likely in ip_fragment()

Andre Oppermann andre at
Thu Jan 15 14:01:52 PST 2004

David Gilbert wrote:
> >>>>> "Andre" == Andre Oppermann <andre at> writes:
> Andre> Where are the outer addresses?
> to  As I said... the above was the older
> output ... which is the same save printing the tunnel endpoints.
> Andre> It should look like this (at least I was able to get correct
> Andre> packets out of it this way):
> Andre> mtu 1476 tunnel inet --> inet
> Andre> --> netmask 0xffffff00
> Andre> I get to this by configuring the following:
> Andre> ifconfig gre0 create # create gre0 interface ifconfig gre0
> Andre> tunnel # outer addresses ifconfig gre0
> Andre> # inner addresses ifconfig gre0 link1 #
> Andre> chose nexthop computation method ifconfig gre0 up # enable gre
> Andre> tunnel
> Keep in mind this is a working tunnel under October's 5.1-CURRENT.  My
> config is:
> cloned_interfaces="gre0"
> ifconfig_gre0="inet netmask
> tunnel"

Ok, I am asking you to check out if it works for you the same way it
works for me.  Then we can proceed to the next step and try to find
out why it is different than it used to be for you.


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