Is it possible to enable TCP keepalive in snapserver side?

[yangsongx]

Hi there,

This project is so cool. I found the default socket is TCP keepalive disabled. Therefor, if some clients connections were dis-connected un-expectly(such as unplug the network cable), the connection would be kept by system(where snapsever was running on) unless the snapserver restarted, or the unplugged network cable re-connected.

I am wondering if we can enable the TCP keepalive, to let snapserver be able to disconnected those zombie connection after the idle timeout, instead of keeping those connections.

Thanks

[kuema]

I was wondering the same.

Most of my snapclients are ESP32-based devices that I just power on and off. so there's no proper disconnect by the snapclient. These clients are shown as online until the connection gets closed by the OS, I think the default TCP keepalive is 7200s on Linux systems.

Apart from TCP keepalive, wouldn't the server be able to detect disconnected clients anyway due to IO-errors on the TCP socket? It could then close the connection from its side and mark the client status as offline.