libwebsockets slow response on iOS device with network disconnect UE4.27

jo.codegirl · July 8, 2022, 4:05pm

I am using libwesockets and establish a session with a server. When network is interrupted (eg. wifi goes off) the client receives a response LWS_CALLBACK_CLIENT_CLOSED. On Android, this is received instantly. On iOS it consistently takes about 1 minute to receive the callback. I can resolve this by using ping-pong with server, however the behaviour on iOS and Android will still be different for users.

Has anyone else encountered this problem and how have they resolved it?

I think that the latest version (4+) of libwesockets will provide a way to resolve this. How can I use the latest version of libwebsockets with UE4.27 as it currently includes version 3.0.0?

Similar issue with response from third party libwebsockets support:

github.com/warmcat/libwebsockets

Websocket client takes 20 minutes to realize network interface is down so insert LWS_CALLBACK_CLIENT_CLOSED event

opened 01:50PM - 01 Apr 20 UTC

closed 02:00PM - 01 Apr 20 UTC

fusionJose

I am using a Websocket client over an external loop (uloop). I have configured t…he ping pong interval with 30 seconds. I have servicing the lws_service_fd function with NULL each second. When the network interface (a 3G wan) goes down (it then after 30 seconds goes up), it takes 20 minutes more less to the websocket client to realize it is down (it has to connect through a new socket again if up) so insert the LWS_CALLBACK_CLIENT_CLOSED event and then reconnect. Curiously when network interface goes down it stops sending pings, but it don´t insert LWS_CALLBACK_CLIENT_CLOSED event. Any idea of how can i add some timeout or something else to check if network is down?

The thirdparty libwebsockets currently in provided by Unreal: