/// <summary>
/// Registers a server to the NAT server so that it can be requested to be joined by clients
/// </summary>
/// <param name="currentPort">The current port that this server is listening for client connections on</param>
/// <param name="natServer">The NAT server host address to connect to</param>
/// <param name="natPort">The NAT server port number to connect to</param>
public void Register(ushort currentPort, string natServer, ushort natPort = DEFAULT_NAT_SERVER_PORT)
{
// Don't allow multiple NAT server connection requests at once
if (Client != null)
{
return;
}
// Connect to the NAT server
Client = new UDPClient();
Client.Connect(natServer, natPort, pendCreates: true);
// When connected, request for this server to be registered to the NAT lookup for clients
NetWorker.BaseNetworkEvent accepted = (NetWorker sender) => {
JSONNode obj = JSONNode.Parse("{}");
obj.Add("port", new JSONData(currentPort));
JSONClass sendJson = new JSONClass();
sendJson.Add("register", obj);
// Send the message to the NAT server
Text register = Text.CreateFromString(Client.Time.Timestep, sendJson.ToString(), false,
Receivers.Target, MessageGroupIds.NAT_SERVER_REGISTER, false);
Client.Send(register, true);
};
Client.serverAccepted += accepted;
// Setup the callback events for when clients attempt to join
Client.textMessageReceived += PlayerConnectRequestReceived;
}
/// <summary>
/// Connect to the NAT hole punch server, this is called from a client machine
/// </summary>
/// <param name="host">The host address of the server the client is trying to connect to</param>
/// <param name="port">The port number of the server the client is trying to connect to</param>
/// <param name="clientPort">The port number that the client is listening on</param>
/// <param name="natServer">The NAT server host address to connect to</param>
/// <param name="natPort">The NAT server port number to connect to</param>
public void Connect(string host, ushort port, ushort clientPort, string natServer,
ushort natPort = DEFAULT_NAT_SERVER_PORT)
{
// Don't allow multiple NAT server connection requests at once
if (Client != null)
{
return;
}
// Connect to the NAT server
Client = new UDPClient();
Client.Connect(natServer, natPort, pendCreates: true);
NetWorker.BaseNetworkEvent accepted = (NetWorker sender) => {
// Send the data to the nat server with the host address and port that this client
// is trying to connect to so that it can punch a hole in the network for this client
JSONNode sendJson = JSONNode.Parse("{}");
sendJson.Add("host", new JSONData(host));
sendJson.Add("port", new JSONData(port));
sendJson.Add("clientPort", new JSONData(clientPort));
// Send the message to the NAT server
Text connect = Text.CreateFromString(Client.Time.Timestep, sendJson.ToString(), false, Receivers.Server,
MessageGroupIds.NAT_SERVER_CONNECT, false);
Client.Send(connect, true);
Client.messageConfirmed += (player, packet) => {
if (packet.uniqueId == connect.UniqueId)
{
Client.Disconnect(false);
}
};
};
Client.serverAccepted += accepted;
}
