private static void ReceiveMessage(Propagate propagate, string nick, byte[] buffer)
{
byte[] messageLengthBytes = new byte[2];
Buffer.BlockCopy(buffer, 1, messageLengthBytes, 0, 2);
int length = BitConverter.ToInt16(messageLengthBytes, 0); //the length of bytes of the message
byte[] messageBytes = new byte[length];
Buffer.BlockCopy(buffer, 3, messageBytes, 0, length);
string message = nick + ":" + Encoding.UTF8.GetString(messageBytes);
Console.WriteLine(message);
propagate.PropagateMessages(message);
}
private static string ReceiveNick(Propagate propagate, string nick, byte[] buffer)
{
Byte[] messageLengthBytes = new byte[2];
Buffer.BlockCopy(buffer, 1, messageLengthBytes, 0, 2);
int length = BitConverter.ToInt16(messageLengthBytes, 0);
byte[] messageBytes = new byte[length];
Buffer.BlockCopy(buffer, 3, messageBytes, 0, length);
string newNick = Encoding.UTF8.GetString(messageBytes);
if (nick != String.Empty)
{
string message = "User changer its nick: " + nick + " --------> " + newNick;
Console.WriteLine(message);
propagate.PropagateMessages(message);
}
nick = newNick;
return(nick);
}
private Task ConnectionHandler(Socket client, Propagate propagate)
{
bool authenticated = false;
string nick = "";
byte[] buffer;
Socket socket = client;
DateTime keepAlive = DateTime.Now;
propagate.list.Add(socket);
return(Task.Run(() =>
{
try
{
while (true)
{
buffer = new byte[4096]; //Max message size
socket.Receive(buffer);
if (requirePassword)
{
for (int x = 0; x < 3; x++)
{
if (!authenticated)
{
buffer = new byte[4096]; //Max message size
socket.Receive(buffer);
authenticated = ReceivePass(buffer, socket); //If true, allow user
}
else
{
socket.Shutdown(SocketShutdown.Both);
socket.Disconnect(true);
socket.Close();
clientNumber--;
return;
}
}
}
byte versionByte = (byte)buffer.GetValue(0);
if (versionByte == messagevByte)
{
ReceiveMessage(propagate, nick, buffer);
}
else if (versionByte == nickvByte)
{
nick = ReceiveNick(propagate, nick, buffer);
}
else if (versionByte == pingvByte)
{
keepAlive = DateTime.Now;
}
}
}
catch (Exception e)
{
if (e is SocketException && keepAlive.Second + 10 > DateTime.Now.Second)
{
Console.WriteLine(e.ToString());
Console.ForegroundColor = ConsoleColor.Red;
Console.Write("Client '{0}' disconnected", nick);
Console.ForegroundColor = ConsoleColor.White;
socket.Shutdown(SocketShutdown.Both);
socket.Disconnect(true);
socket.Close();
clientNumber--;
return;
}
else if (e is SocketException)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Lost connection with a client. The client '{0}' probably suffered an unexpected error. {1}No ping from '{0}' was received in the last 10 seconds.", nick, Environment.NewLine);
Console.ForegroundColor = ConsoleColor.White;
socket.Shutdown(SocketShutdown.Both);
socket.Disconnect(true);
socket.Close();
clientNumber--;
return;
}
else
{
Console.WriteLine(e.ToString());
socket.Shutdown(SocketShutdown.Both);
socket.Disconnect(true);
socket.Close();
clientNumber--;
return;
}
}
}));
}
