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0c8b9a68b3
This test runs an overlay traffic, forwarded over a multicast-routed VXLAN underlay. In order to determine whether packets reach their intended destination, it uses a TC match. For convenience, it uses a flower match, which however does not allow matching on the encapsulated packet. So various service traffic ends up being indistinguishable from the test packets, and ends up confusing the test. To alleviate the problem, the test uses sleep to allow the necessary service traffic to run and clear the channel, before running the test traffic. This worked for a while, but lately we have nevertheless seen flakiness of the test in the CI. Fix the issue by using u32 to match the encapsulated packet as well. The confusing packets seem to always be IPv6 multicast listener reports. Realistically they could be ARP or other ICMP6 traffic as well. Therefore look for ethertype IPv4 in the IPv4 traffic test, and for IPv6 / UDP combination in the IPv6 traffic test. Signed-off-by: Petr Machata <petrm@nvidia.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/6438cb1613a2a667d3ff64089eb5994778f247af.1765289566.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>