proxy: Add detection for stale/broken TCP connections - #724
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Consider TCP connections as broken after user-specified time of no transmissions (currently set to 5 minutes) and closes the respective proxy socket pair from inverter to the growatt server. This is required for some environments (such as docker), where the grott proxy will simply not receive any data from the growatt inverter anymore.
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Some more explanation of the effects of a stale connection over multiple days: As grott is not able to detect any remotely closed TCP connections, the list of sockets monitored by select() will grow over time. After approx. 3 days, select() strangely fails to detect new incoming TCP connections coming from the growatt box... As a consequence, no data is received from the inverter anymore until grott is restarted. FWIW: I am not sure why select() fails to work properly, probably it's related to my setup, where grott is running in a docker container. |
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Consider TCP connections as broken after user-specified time of no transmissions (currently set to 5 minutes) and closes the respective proxy socket pair from inverter to the growatt server.
This is required for some environments (such as docker), where the grott proxy will simply not receive any data from the growatt inverter anymore.