Web Player and System.Net.Socket restrictions?

Unity Engine
1

Hi

I built a .Net library for sending UDP packets to a backend server which works fine in the Unity editor and as a standalone build. When I deploy the game as a web build I get the following error in the Log:

SocketException: Invalid arguments
System.Net.Sockets.Socket.Bind (System.Net.EndPoint local_end)

Is there some sort of restrictions on using Sockets in the web player?

Thanks

John T

2

I’m not sure, but I recall reading that you can’t use plugins in webplayers for security reasons.

3

I’ve used .NET sockets in the web player without issue, so must be something else causing the issue.

4

Hmm

This is very strange. Weird how it works in a standalone and not in a web player.I think my problem could be the way in which I try to grab the local IP address:

        public Client(string IPAddress, int port)
        {
            _serverEndPoint = new IPEndPoint(System.Net.IPAddress.Parse(IPAddress), port);
            _client.Client.Bind(getAuthEndPoint());
        }

        private IPEndPoint getAuthEndPoint()
        {
            string hostName = Dns.GetHostName();
            IPHostEntry ipEntry = Dns.GetHostEntry(hostName);
            IPAddress defaultIPAddress = ipEntry.AddressList[0];

            return new IPEndPoint(defaultIPAddress, 0);
        }

I need to do some debugging… stay tuned…

Thanks

John T

5

Right, I found the answer to this with a little debugging magic…

When the game runs standalone it picks up the IPv4 address as the first address without issue, but strangely when I run the game in the browser it detects an IPv6 address as the first address.

Now to fix it…

I have to be careful here that I always grab a valid IPv4 address and not stuff like IPv6 and loopback addresses!

John T

6

Okay

This is my last post on this (unless somebody has a great idea on how to fix this) - otherwise I’m going to add it to the ‘lets do this later’ list…

I have put some logic in the library to check that the detected address is IPv4 and isn’t the loopback address, I just need to be able to bind the UDP client manually from within Unity…

public void Initialise()
	{
		// if we had trouble automatically binding the auth client...
		if(!_sgapClient.Bound)
		{
			// TODO: Need to get the IP address
			string ipToBind = "192.168.0.2"; // temp hack!
			_sgapClient.BindClientManually(new System.Net.IPEndPoint(System.Net.IPAddress.Parse(ipToBind), 0));	
		}
	}

There we have it… any ideas would be appreciated.

Ta

John T