VPNConnection using NWUDPSession disconnecting after sleep/wake

Do we need to wait for some state after wake? It's hard to understand since it's only happening when running on the Ethernet-port.

It's hard to say. It may be just that your packet tunnel needs to reconnect itself with the VPN server and the NWUDPSession has gone into the .failed or .cancelled state. What is NWUDPSessionState reporting when this happens?

Matt Eaton
DTS Engineering, CoreOS
meaton3@apple.com

Hi again Matt,

I can see this error when trying to writeDatagram just after wake from sleep...

Failed to write data to udpSession. Error: The operation couldn’t be completed. No buffer space available, (code=55)

Best regards / Jorgen

It seems like if we keep trying the NWUDPSession eventually can start to write

Is it a situation where your packet tunnel just needs to re-establish the connection to the server in the wake method and until it does the NWUDPSession is not available? If this is true I am assuming that based on the successful call to setTunnelNetworkSettings you could go through and establish the session for NWUDPSession once again.

You may also want to check the NWUDPSessionState in this condition and if it reports .failed or .cancelled it would be worth testing out whether you can establish the NWUDPSession once again. If you cannot then I would suspect that your packet tunnel is not setup from coming alive on wake.

Matt Eaton
DTS Engineering, CoreOS
meaton3@apple.com