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

[David Gilbert]

>>>>> "Andre" == Andre Oppermann <andre at freebsd.org> writes:

Andre> Where are the outer addresses?

24.100.27.151 to 66.246.133.17.  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> gre0: flags=b051<UP,POINTOPOINT,RUNNING,LINK0,LINK1,MULTICAST>
Andre> mtu 1476 tunnel inet 62.48.0.50 --> 62.48.0.47 inet 192.168.1.1
Andre> --> 192.168.1.2 netmask 0xffffff00

Andre> I get to this by configuring the following:

Andre> ifconfig gre0 create # create gre0 interface ifconfig gre0
Andre> tunnel 62.48.0.50 62.48.0.47 # outer addresses ifconfig gre0
Andre> 192.168.1.1 192.168.1.2 # 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 66.246.133.114 66.246.133.113 netmask 255.255.255.252 tunnel 24.100.27.151 66.246.133.17"

Dave.

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|David Gilbert, Independent Contractor.       | Two things can only be     |
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