[v1.15] fqdn: Skip "open ports" check for statically configured ports #35948
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[ upstream commit fb7e01b ] When restoring the previous DNS proxy port, we check if the port is already in-use. However, if the port we retrieved from `GetProxyPort` was previously set via `SetProxyPort`, then we want to use it unconditionally. We rely on `isStatic` for this, as static ports cannot change and the open port may be open with `SO_REUSEPORT` (which `proxy.OpenLocalPorts()` does not check). Restored ports never have `isStatic` set to true, so this does retain the "open ports" check if the port was restored. In addition, when restoring ports we want to make sure that previous calls to `SetProxyPort` are also not overwritten, thus this commit also only restores the port if it wasn't explicitly set. This is the same behavior we had previously, which did not check the returned port of `d.l7Proxy.GetProxyPort` against the list of open ports. Fixes: d11e4d2 ("proxy: Reuse proxy ports from datapath on restart") Signed-off-by: Sebastian Wicki <sebastian@isovalent.com>
squeed
approved these changes
Nov 13, 2024
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/test-backport-1.15 |
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This is a release blocker because the referenced commit has been backported to v1.15