private NetPeerConfiguration CreateNetPeerConfiguration(BadNetworkSimulation badNetworkSimulation)
{
var config = new NetPeerConfiguration(appConfig.AppId);
if (badNetworkSimulation != null)
{
badNetworkSimulation.ApplySettingsToConfig(config);
}
// TODO: Re-enable UPnP... or, better yet, replace it with an implementation that doesn't block the network thread!
//config.EnableUPnP = true; // <- Lidgren locks this property, so it must be set here
// NOTE: Additional configuration options are enabled/disabled as required:
// These NetIncomingMessageTypes: DiscoveryRequest, DiscoveryResponse, UnconnectedData (for NAT punch through)
// Also: AcceptIncomingConnections
// NOTE: Hard-coded time-outs in the P2P layer (see "P2P Network.pptx") depend on the
// configuration using these default values.
// (Ideally the time-outs should not be hard-coded, but calculated from these values)
Debug.Assert(config.ConnectionTimeout == 25.0f);
Debug.Assert(config.PingInterval == 4.0f);
Debug.Assert(config.ResendHandshakeInterval == 3.0f);
Debug.Assert(config.MaximumHandshakeAttempts == 5);
return(config);
}
private void SetupSocket(BadNetworkSimulation badNetworkSimulation)
{
// Try each known port to see if we can open a socket...
for (int i = 0; i < appConfig.KnownPorts.Length; i++)
{
try
{
NetPeerConfiguration config = CreateNetPeerConfiguration(badNetworkSimulation);
config.Port = appConfig.KnownPorts[i];
netPeer = new NetPeer(config);
netPeer.Start();
Log("Socket opened on port " + PortNumber);
return;
}
catch (SocketException socketException) // Probably port unavailable
{
if (socketException.SocketErrorCode != SocketError.AddressAlreadyInUse)
{
throw; // Actually, it was something else
}
else
{
continue; // Try the next port
}
}
}
Log("Known port unavailable, auto-assigning port...");
{
// Try again with auto-assigned port
NetPeerConfiguration config = CreateNetPeerConfiguration(badNetworkSimulation);
config.DisableMessageType(NetIncomingMessageType.DiscoveryRequest); // <- will enable when we need it
config.Port = 0;
netPeer = new NetPeer(config);
netPeer.Start();
Log("Socket opened on port " + PortNumber);
}
}
public P2PNetwork(NetworkAppConfig appConfig, NetworkLogHandler networkLogHandler = null,
BadNetworkSimulation badNetworkSimulation = null)
{
if (appConfig == null)
{
throw new ArgumentNullException("appConfig");
}
this.appConfig = appConfig;
NetworkLogHandler = networkLogHandler;
Log("Configuration:");
Log(" AppId = " + appConfig.AppId);
Log(" Version = " + appConfig.ApplicationVersion);
Log(" Signature = " + BitConverter.ToString(appConfig.ApplicationSignature));
SetupSocket(badNetworkSimulation);
LocalisedDisconnectReason = null;
}