https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276838
--- Comment #3 from Kristof Provost <k...@freebsd.org> ---
I am unable to reproduce any such issue testing locally. Over an IPv6 tunnel I
manage to transmit arbitrary sized ping requests, and I also see no issues
transmitting a large (1MB) file.
Patch for reference:
diff --git a/tests/sys/net/if_ovpn/if_ovpn.sh
b/tests/sys/net/if_ovpn/if_ovpn.sh
index bbaffa0bce73..0ec2563cf355 100644
--- a/tests/sys/net/if_ovpn/if_ovpn.sh
+++ b/tests/sys/net/if_ovpn/if_ovpn.sh
@@ -308,10 +308,28 @@ atf_test_case "4in6" "cleanup"
keepalive 100 600
"
+ dd if=/dev/random of=test.img bs=1024 count=1024
+ cat test.img | jexec a nc -N -l 1234 &
+
# Give the tunnel time to come up
sleep 10
atf_check -s exit:0 -o ignore jexec b ping -c 3 198.51.100.1
+
+ # MTU sweep
+ for i in `seq 1000 1500`
+ do
+ atf_check -s exit:0 -o ignore jexec b \
+ ping -c 1 -s $i 198.51.100.1
+ done
+
+ rcvmd5=$(jexec b nc -N -w 3 198.51.100.1 1234 | md5)
+ md5=$(md5 test.img)
+
+ if [ $md5 != $rcvmd5 ];
+ then
+ atf_fail "Transmit corruption!"
+ fi
}
4in6_cleanup()
--
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