private static void ProcessServerJoinRequest(Tuple <Transmission, Connection> transmission)
{
Console.WriteLine($"{transmission.Item2.ConnectionID} (Connection): Processing Join Request");
var connection = transmission.Item2;
var userID = transmission.Item1.SenderID.ToByteArray();
// Update connection User data
// TODO: Set name if already exists in DB
connection.User = new User(userID, (new Guid(userID.Skip(16).Take(16).ToArray())).ToString());
// Check to see if the User is currently connected on any other Connections
var firstConnection = !ServerConnections.USER_CONNECTIONS.ContainsKey(userID);
// Add Connection to relevant collections
ServerConnections.Add(connection);
// Send join message if this is the first Connection for this User
if (firstConnection)
{
ServerTransmissionHandler.Send(userID, $"-------------------User: {connection.User.Name} has joined--------------------");
}
// Update Connection to show succesful join
connection.Joined = true;
// Send success Response
ServerTransmissionHandler.SendResponse(connection, Errors.Error.NoError);
// Send success ServerMessage
ServerTransmissionHandler.Send(connection, "SERVER: Join Successful");
// Send user count ServerMessage
ServerTransmissionHandler.Send(connection, $"SERVER: {ServerConnections.USER_CONNECTIONS.Keys.Count} users currently online");
}
private static void LookForConnections()
{
var tcpListener = new TcpListener(LOCAL_ADDRESS, PORT);
try
{
tcpListener.Start(1000);
//UICONTROLLER.Display(new Message(SERVER_USER, "Starting up..."));
while (true)
{
try
{
var connection = new Connection(tcpListener.AcceptTcpClient());
Console.WriteLine($"{connection.ConnectionID} (Connection): Connection Established");
connection.SessionKey = Encryption.DiffieHellman.GetSharedKey(connection.TCPClient);
Console.WriteLine($"{connection.ConnectionID} (Connection): Session Key Established");
ServerConnections.Add(connection);
new Task(() => { ServerTransmissionHandler.RecieveFrom(connection); }).Start();
}
catch (Exception e)
{
Console.WriteLine("Connection failed, Error: {0}", e);
}
}
}
catch (SocketException e)
{
Console.WriteLine("SocketException: {0}", e);
}
finally
{
tcpListener.Stop();
//UICONTROLLER.Display(new Message(SERVER_USER, "Shutting down..."));
}
}
// Main loop to receive from a connection
public static void RecieveFrom(Connection connection)
{
while (true)
{
try
{
// Attempt to add new Transmission to queue
TransmissionsRecieved.Enqueue(new Tuple <Transmission, Connection>(Recieve(connection), connection));
// Signal Transmission has been received
transmissionsRecievedSignal.Set();
}
catch (System.IO.IOException)
{
// Remove connection when error occurs
Console.WriteLine($"{connection.ConnectionID} (Connection): Disconnected (IOException)");
ServerConnections.Remove(connection);
return;
}
catch (System.Security.Cryptography.CryptographicException)
{
// Remove connection when error occurs
Console.WriteLine($"{connection.ConnectionID} (Connection): Disconnected (CryptographicException)");
ServerConnections.Remove(connection);
return;
}
}
}
private static void ProcessChatJoinRequest(Tuple <Transmission, Connection> transmission)
{
var userID = transmission.Item1.SenderID.ToByteArray();
var chatID = new Guid(transmission.Item1.Request.ChatJoinRequest.ChatID.ToByteArray());
// TODO: Permissions
if (!(ServerConnections.CHAT_USERS.ContainsKey(chatID) && ServerConnections.CHAT_USERS[chatID].ContainsKey(userID)))
{
ServerConnections.AddToChat(userID, chatID);
ServerTransmissionHandler.SendResponse(transmission.Item2, Errors.Error.NoError);
Console.WriteLine($"{transmission.Item2.User.Name} (User): Joined {chatID} (Chat)");
}
//TODO: Error processing
}
public static void StartServer()
{
//UICONTROLLER.Display += (x) => { System.Console.WriteLine($"<{x.Author.Name}>: {x._message}"); };
//System.Console.WriteLine(Dns.GetHostName());
Task processTransmisisons = new Task(() => { ServerTransmissionHandler.OnTransmissionRecieved(); });
processTransmisisons.Start();
Task lookingForConenctions = new Task(LookForConnections);
lookingForConenctions.Start();
lookingForConenctions.Wait();
processTransmisisons.Wait();
foreach (var connection in ServerConnections.CONNECTIONS)
{
ServerConnections.Remove(connection.Value);
}
}