[Bug 276838] ovpn(4) - problems with large TCP segments over IPv6 tunnel when DCO module is used at both ends
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Date: Thu, 21 Mar 2024 07:28:36 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276838 --- Comment #3 from Kristof Provost <kp@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() -- You are receiving this mail because: You are on the CC list for the bug. You are the assignee for the bug.