private void ConnectionResultOnClientCallback(Result<Connection> result)
{
Logic.HideDialog("Connecting to server");
if (NetworkEngine.IsConnectedToGameServer)
{
// Silently ignore extra server connection attempts.
if (result.Successful) result.Value.Dispose();
return;
}
if (!result.Successful)
{
Log.Write("Failed to connect to server: " + result.Error);
StopClient("Failed to connect to server.");
}
else
{
MessageHandlers.DeactivateHandlers(MessageHandlers.GetStandaloneMenuHandlers(null));
NetworkEngine.GameServerConnection = result.Value;
MessageHandlers.ActivateHandlers(MessageHandlers.GetClientMenuHandlers());
var joinRequest = new GameServerHandshakeRequestTCP
{
CanonicalStrings = CanonicalString.CanonicalForms,
GameClientKey = NetworkEngine.GetAssaultWingInstanceKey(),
};
NetworkEngine.GameServerConnection.Send(joinRequest);
}
}
private void HandleGameServerHandshakeRequestTCP(GameServerHandshakeRequestTCP mess)
{
var net = Game.NetworkEngine;
string clientDiff, serverDiff;
int diffIndex;
bool differ = MiscHelper.FirstDifference(mess.CanonicalStrings, CanonicalString.CanonicalForms, out clientDiff, out serverDiff, out diffIndex);
var connection = net.GetGameClientConnection(mess.ConnectionID);
if (differ)
{
var mismatchInfo = string.Format("First mismatch is index: {0}, client: {1}, server: {2}",
diffIndex, clientDiff ?? "<missing>", serverDiff ?? "<missing>");
var extraInfo = diffIndex == 0 ? "" : string.Format(", client previous: {0}, server previous: {1}",
mess.CanonicalStrings[diffIndex - 1], CanonicalString.CanonicalForms[diffIndex - 1]);
Log.Write("Client's CanonicalStrings don't match ours. " + mismatchInfo + extraInfo);
var reply = new ConnectionClosingMessage { Info = "of version mismatch (canonical strings).\nPlease install the latest version from\nwww.assaultwing.com" };
connection.Send(reply);
net.DropClient(mess.ConnectionID);
}
else
{
connection.ConnectionStatus.ClientKey = mess.GameClientKey;
connection.ConnectionStatus.State = ConnectionUtils.GameClientStatus.StateType.Active;
// Send dummy UDP packets to probable UDP end points of the client to increase
// probability of our NAT forwarding UDP packets from the client to us.
var ping = new PingRequestMessage();
for (int port = NetworkEngine.UDP_CONNECTION_PORT_FIRST; port <= NetworkEngine.UDP_CONNECTION_PORT_LAST; port++)
net.UDPSocket.Send(ping.Serialize, new IPEndPoint(net.GetConnection(mess.ConnectionID).RemoteTCPEndPoint.Address, port));
}
}