GetConnection() In IOS Not Giving Exception

[Anonymous]

Hello.

I have a Xamarin IOS app which uses NetworkCommsDotNet to communicate with a server. When the IOS app tries to connect to the server and the server is not running I expect to get an exception at the GetConnection() call but I don’t and instead the call just hangs. When I test this from a client running on Windows I get a ‘ConnectionSetupException’ at the GetConnection call, should I be getting this exception from the same call from my IOS app as well ?

On IOS if the establishIfRequired parameter is set to false in the GetConnection() call then, if the server is not available, the call returns immediately with no exception but obviously I get an exception on any subsequent network operation.

When the server is running everything connects and works as expected. I am using version 3 of NetworkcommsDotNet.

Thanks for any help…

Andrew

[Anonymous]

Heya Andrew,

Thank-you for the bug report. Might you be so kind an create an issue on our bug tracker, https://bitbucket.org/MarcF/networkcomms.net/issues/new.

We had a similar issue with android so the two may be related.

Kind regards,
Marc

[Anonymous]

Hello Marc.

Thanks for the reply.

I have created an issue for this bug.

Andrew

[Anonymous]

For anyone else who has come across this problem here is my current workaround (until the version comes out with a fix for this issue). I call the following method prior to trying to connect with networkcomms.net. Only if this method tells me something is listening do I try and connect with networkcomms.net library.

static bool IsServerAvailable(string IPOfServer, int PortNumberToTry)
{
bool SomethingListeningOnPort = false;

try
{
System.Net.Sockets.Socket sock = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork,
System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
sock.Connect(IPOfServer, PortNumberToTry);
if (sock.Connected == true) // Port is in use and connection is successful
SomethingListeningOnPort = true;
sock.Close();

}
catch (System.Net.Sockets.SocketException)
{
SomethingListeningOnPort = false;
}

return SomethingListeningOnPort;
}

Andrew

[Author]

Posts