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authorAlexander Chernavin <achernavin@netgate.com>2022-09-23 12:41:31 +0000
committerMatthew Smith <mgsmith@netgate.com>2022-09-28 13:58:19 +0000
commitcf9144e65f37402fc6f7dacb7bd7bad6fd596784 (patch)
treeb62b8ee793270b8291ed1b4a0a501551494ed1be /extras
parentce668aa3f6b79ca505d1282ee4ba2b3c26fb126c (diff)
tests: stabilize wireguard ratelimiting test
Type: test "test_wg_handshake_ratelimiting_multi_peer" has been unstable recently because the test strongly relies on execution speed. Currently, the test triggers ratelimiting for peer 1 and sends handshake initiations from peer 1 and 2 mixed up. After that, the test expects that all handshake initiations for peer 1 are ratelimited and a handshake response for peer 2 is received. Ratelimiting is based on the token bucket algorithm. The more time passes between triggering ratelimiting for peer 1 and sending a mixture of handshake initiations from peer 1 and 2, the more tokens will be added into the bucket for peer 1. Depending on delays between these steps, the number of tokens might be enough to process handshake initiations from peer 1 while they are expected to be rejected due to ratelimiting. With this change, these two steps are combined into one and the logic modified. The test triggers ratelimiting for both peer 1 and 2. Packets that trigger ratelimiting and that are to be rejected are sent in one batch that is going to reduce delays between packet processing. Also, verify that number of rejected handshake messages is in expected range instead of verifying the exact number as it still may slightly vary. Also, this should finish making the wireguard tests stable on Ubuntu 22.04 and Debian 11. Signed-off-by: Alexander Chernavin <achernavin@netgate.com> Change-Id: I3407d15abe1356dde23a241ac3650e84401c9802
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