Backport(v1.16) tests: fix unused_port (PR#4675) #4788
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It obtains unused port number for TCP by unused_port method and the number has been used in UDP. And that number may be already used by UDP sockets. This patch will obtain and use unused ports appropriately for each protocol. See #4675 Signed-off-by: Watson <[email protected]> Signed-off-by: Kentaro Hayashi <[email protected]>
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Which issue(s) this PR fixes:
Fixes #4674
What this PR does / why we need it:
It obtains unused port number for TCP by unused_port method and the number has been used in UDP.
And that number may be already used by UDP sockets.
This patch will obtain and use unused ports appropriately for each protocol.
Backported from #4675
Docs Changes:
Release Note: