v1.31 Backports 2024-12-19 #1070
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[ upstream commit 4b7b1b1 ] This commit enables the UDP proxy related envoy extensions. * `UDPProxy` UDP listener filter * `HTTPCapsule` UDP session filter * `DynamicForwardProxy` UDP session filter Signed-off-by: Marco Hofstetter <[email protected]>
[ upstream commit b2e1bb5 ] Currently, configuring a UDP listener (Envoy listener with socket address protocol set to `udp`) with a UDPProxy in Envoy may fail due to Envoy failing to missing privileges to bind the listener address. The reason is that the Cilium Proxy uses a "starter" that drops all privileged capabilities before forking the actual Envoy process (See #315 for more details.) Setting up the necessary socket options is part of the Cilium `BPFMetadata` listener filter. The current `BPFMetadata` listener filter can't be used as UDP listener filter (different factory). Therefore, this commit introduces a UDP capable version of the `BPFMetadata` listener filter. It's only purpose is to setup the UDP listener socket correctly (IP_TRANSPARENT, SO_REUSEADDR, ...). It's currently NOT adding any BPF metadata related information to the socket. This is not necessary as the Cilium network filters aren't yet available for UDP either. Signed-off-by: Marco Hofstetter <[email protected]>
sayboras
approved these changes
Dec 19, 2024
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