private void CloseConnectionCallback(IAsyncResult ar)
{
int sent = 0;
try
{
sent = sender.EndSend(ar);
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
return;
}
WriteLog(LogStrings.BytesWereSuccessfulySent(sent));
WriteLog(LogStrings.CloseSocket());
try
{
sender.Shutdown(SocketShutdown.Both);
sender.Close();
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
}
senderSema.Release();
}
private void ConnectToServer()
{
IPHostEntry ipHostInfo = Dns.GetHostEntry(host);
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint ipEndPoint = new IPEndPoint(ipAddress, port);
senderSema.Wait();
sender = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
while (true)
{
try
{
WriteLog(LogStrings.TryingToConnectToEndPoint(ipEndPoint));
sender.Connect(ipEndPoint);
WriteLog(LogStrings.ConnectedSuccessfullyToEndPoint(ipEndPoint));
senderSema.Release();
break;
}
catch (Exception exc)
{
WriteLog(LogStrings.ExceptionWasThrown(exc));
}
}
}
private void ReceiveCallback(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workerSocket;
string name = GetSocketName(handler);
int bytesRec = 0;
try
{
bytesRec = handler.EndReceive(ar);
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
return;
}
WriteLog(LogStrings.BytesWereReceivedSuccessfuly(bytesRec, name));
string msg = Encoding.UTF8.GetString(state.buffer, 0, bytesRec);
WriteLog(LogStrings.MessageWasReceivedSuccessfuly(msg, name));
if (msg.IndexOf(endMessage) != -1)
{
Invoke(new Method(() => clientsListBox.Items.Remove(clientsListBox.Items[clientsListBox.Items.IndexOf(name)])));
WriteLog(LogStrings.ClosingSocket(name));
RemoveClient(name);
try
{
handler.Shutdown(SocketShutdown.Both);
handler.Close();
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
}
return;
}
string[] paths = msg.Split(';');
string response = MultiplyVectorAndMatrix(paths[0], paths[1]);
if (response == null)
{
response = invalidInputException;
}
byte[] bytes = Encoding.UTF8.GetBytes(response);
WriteLog(LogStrings.AttemptingToSendMessageToClient(response, name));
handler.BeginSend(bytes, 0, bytes.Length, 0, new AsyncCallback(SendCallback), handler);
}
private void SendCallback(IAsyncResult ar)
{
Socket handler = (Socket)ar.AsyncState;
int bytesSent = 0;
try
{
bytesSent = handler.EndSend(ar);
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
return;
}
WriteLog(LogStrings.BytesWereSentSuccessfuly(bytesSent, GetSocketName(handler)));
Receive(handler);
}
private void StartListening()
{
IPHostEntry ipHostEntry = Dns.GetHostEntry(host);
IPAddress ipAddress = ipHostEntry.AddressList[0];
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);
listener = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
try
{
WriteLog(LogStrings.TryingToBindListenerToEndPoint(localEndPoint));
listener.Bind(localEndPoint);
WriteLog(LogStrings.BindingWasSuccessful(localEndPoint));
listener.Listen(maxNumberOfListeners);
WriteLog(LogStrings.StartingToListenConnections());
} catch (Exception exc)
{
WriteLog(LogStrings.ExceptionWasThrown(exc));
}
}
private void ReceiveCallback(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
int bytesRec = 0;
try
{
bytesRec = handler.EndReceive(ar);
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
return;
}
WriteLog(LogStrings.BytesWereReceivedFromServer(bytesRec));
senderSema.Release();
string path = Encoding.UTF8.GetString(state.buffer, 0, bytesRec);
PrintResult(path);
}
private void AcceptCallback(IAsyncResult ar)
{
Socket listener = (Socket)ar.AsyncState;
Socket handler = null;
try
{
handler = listener.EndAccept(ar);
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
return;
}
AddSocket(handler);
string name = GetSocketName(handler);
WriteLog(LogStrings.ClientConnectionWasAccepted(name));
Invoke(new Method(() => clientsListBox.Items.Add(name)));
Receive(handler);
}
private void SendCallback(IAsyncResult ar)
{
Socket sender = (Socket)ar.AsyncState;
int bytesSent = 0;
try
{
bytesSent = sender.EndSend(ar);
} catch (Exception e)
{
WriteLog(LogStrings.ExceptionWasThrown(e));
return;
}
WriteLog(LogStrings.BytesWereSuccessfulySent(bytesSent));
StateObject state = new StateObject();
state.workSocket = sender;
WriteLog(LogStrings.WaitingToReceiveMessageFromServer());
sender.BeginReceive(state.buffer, 0, state.buffer.Length, 0, new AsyncCallback(ReceiveCallback), state);
}
