private void connectCallback(IAsyncResult ar)
{
try
{
TcpListener server = (TcpListener)ar.AsyncState;
TcpClient client = server.EndAcceptTcpClient(ar);
TcpState state = new TcpState(client);
this.clientDict.Add(state.ID, state);
state.Stream.BeginRead(state.Buffer, 0, state.Buffer.Length, new AsyncCallback(receiveCallback), state);
server.BeginAcceptTcpClient(new AsyncCallback(connectCallback), server);
this.Notify?.Invoke($"The client {state.ID} has already connected!");
}
catch (Exception ex)
{
this.Error?.Invoke(ex.Message);
}
}
private void receiveCallback(IAsyncResult ar)
{
TcpState state = (TcpState)ar.AsyncState;
int readbytes = 0;
try
{
readbytes = state.Stream.EndRead(ar);
}
catch
{
readbytes = 0;
}
if (readbytes == 0)
{
this.Error?.Invoke($"Client {state.ID} is already disconnect!");
this.clientDict.Remove(state.ID);
return;
}
byte[] buf = new byte[readbytes];
Array.Copy(state.Buffer, 0, buf, 0, readbytes);
state.Stream.BeginRead(state.Buffer, 0, state.Buffer.Length, new AsyncCallback(receiveCallback), state);
this.Received?.Invoke(buf);
}
private void sendCallback(IAsyncResult ar)
{
TcpState state = (TcpState)ar.AsyncState;
state.Stream.EndWrite(ar);
}
public void Send(byte[] data, string remote)
{
TcpState state = this.clientDict[remote];
state.Stream.BeginWrite(data, 0, data.Length, new AsyncCallback(sendCallback), state);
}