public bool Send(string message, xConnection conn)
{
if (conn != null && conn.socket.Connected)
{
lock (conn.socket)
{
conn.socket.Send(Encoding.UTF8.GetBytes(message), message.Length, SocketFlags.None);
}
}
else
{
return(false);
}
return(true);
}
public void SetAuth(bool accepted, xConnection conn)
{
if (accepted)
{
Console.WriteLine("[SRV] Sending auth True");
Send("NinjaAck", conn);
ClientConnected();
conn.socket.BeginReceive(conn.buffer, 0, conn.buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveData), conn);
}
else
{
Console.WriteLine("[SRV] Sending auth false");
Send("NinjaNACK", conn);
conn.socket.Close();
_sockets.Remove(conn);
}
}
private void OnClientConnect(IAsyncResult result)
{
xConnection conn = new xConnection();
try
{
//Finish accepting the connection
Socket s = (Socket)result.AsyncState;
conn = new xConnection();
conn.socket = s.EndAccept(result);
conn.buffer = new byte[_bufferSize];
lock (_sockets)
{
_sockets.Add(conn);
}
// if (ClientConnected != null)
// ClientConnected();
Console.WriteLine("[SRV] client connected");
//Queue recieving of data from the connection
conn.socket.BeginReceive(conn.buffer, 0, conn.buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveData), conn);
//Queue the accept of the next incomming connection
_serverSocket.BeginAccept(new AsyncCallback(OnClientConnect), _serverSocket);
}
catch (Exception e)
{
if (conn.socket != null)
{
conn.socket.Close();
lock (_sockets)
{
_sockets.Remove(conn);
}
}
//Queue the next accept, think this should be here, stop attacks based on killing the waiting listeners
_serverSocket.BeginAccept(new AsyncCallback(OnClientConnect), _serverSocket);
}
}
private void ReceiveData(IAsyncResult result)
{
xConnection conn = (xConnection)result.AsyncState;
try
{
//Grab our buffer and count the number of bytes receives
int bytesRead = conn.socket.EndReceive(result);
//make sure we've read something, if we haven't it supposadly means that the client disconnected
if (bytesRead > 0)
{
string message = Encoding.UTF8.GetString(conn.buffer, 0, bytesRead);
Console.WriteLine(DateTime.Now.ToShortTimeString() + " [SRV] message received: " + message);
if (message.Contains("NinjaConnect")) //it's a message from the client who knows my ip
{
Send("NinjaAck", conn);
ClientConnected();
//Queue the next receive
conn.socket.BeginReceive(conn.buffer, 0, conn.buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveData), conn);
}
else if (message.Contains("NinjaTestConnect")) //the client first connection request
{
//we need to ask permission
string address = conn.socket.RemoteEndPoint.ToString();
address = address.Remove(address.IndexOf(':'));
//this is to check if the client is in the authorized clients list
if (_authorizedClients != null && _authorizedClients.Where(cl => cl.IPaddress.Contains(address)).FirstOrDefault() != null)
{
SetAuth(true, conn);
}
else
{
OnClientAskForConnection(conn);
}
}
else if (message.Contains("NinjaKey="))
{
string key = message.Replace("NinjaKey=", "");
if (OnMessageReceived != null)
{
OnMessageReceived(key);
}
conn.socket.BeginReceive(conn.buffer, 0, conn.buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveData), conn);
}
else
{
//message from someone else
conn.socket.Close();
_sockets.Remove(conn);
}
}
else
{
//Callback run but no data, close the connection
//supposadly means a disconnect
//and we still have to close the socket, even though we throw the event later
conn.socket.Close();
lock (_sockets)
{
_sockets.Remove(conn);
}
if (ClientDisconnected != null)
{
ClientDisconnected();
}
}
}
catch (SocketException e)
{
//Something went terribly wrong
//which shouldn't have happened
if (conn.socket != null)
{
conn.socket.Close();
lock (_sockets)
{
_sockets.Remove(conn);
}
}
}
}
