private void HandleDatagramReceived(IAsyncResult ar)
{
if (IsRunning)
{
TcpClientState internalClient = (TcpClientState)ar.AsyncState;
NetworkStream networkStream = internalClient.NetworkStream;
int numberOfReadBytes = 0;
try {
numberOfReadBytes = networkStream.EndRead(ar);
} catch {
numberOfReadBytes = 0;
}
if (numberOfReadBytes == 0)
{
OnClientDisconnected(internalClient);
return;
}
// received byte and trigger event notification
byte[] receivedBytes = new byte[numberOfReadBytes];
Buffer.BlockCopy(internalClient.Buffer, 0, receivedBytes, 0, numberOfReadBytes);
OnDatagramReceived(internalClient, receivedBytes);
//RaisePlaintextReceived(internalClient.TcpClient, receivedBytes);
// continue listening for tcp datagram packets
networkStream.BeginRead(internalClient.Buffer, 0, internalClient.Buffer.Length, HandleDatagramReceived, internalClient);
}
}
private void HandleTcpClientAccepted(IAsyncResult ar)
{
if (IsRunning)
{
TcpListener tcpListener = (TcpListener)ar.AsyncState;
TcpClient tcpClient = tcpListener.EndAcceptTcpClient(ar);
byte[] buffer = new byte[tcpClient.ReceiveBufferSize];
TcpClientState internalClient = new TcpClientState(tcpClient, buffer, GetNewSid());
OnClientConnected(internalClient);
NetworkStream networkStream = internalClient.NetworkStream;
networkStream.BeginRead(internalClient.Buffer, 0, internalClient.Buffer.Length, HandleDatagramReceived, internalClient);
tcpListener.BeginAcceptTcpClient(new AsyncCallback(HandleTcpClientAccepted), ar.AsyncState);
}
}
/// <summary>
/// 发送报文至指定的客户端
/// </summary>
/// <param name="tcpClient">客户端</param>
/// <param name="datagram">报文</param>
public void Send(TcpClientState tcpClient, byte[] datagram)
{
if (!IsRunning)
{
throw new InvalidProgramException("This TCP server has not been started.");
}
if (tcpClient == null || tcpClient.TcpClient == null)
{
throw new ArgumentNullException("tcpClient");
}
if (datagram == null)
{
throw new ArgumentNullException("datagram");
}
tcpClient.TcpClient.GetStream().BeginWrite(
datagram, 0, datagram.Length, HandleDatagramWritten, tcpClient);
}
public void Disconnect(TcpClientState tcpClient)
{
tcpClient.TcpClient.Client.Disconnect(false);
}
/// <summary>
/// 发送报文至指定的客户端
/// </summary>
/// <param name="tcpClient">客户端</param>
/// <param name="datagram">报文</param>
public void Send(TcpClientState tcpClient, string datagram)
{
Send(tcpClient, this.Encoding.GetBytes(datagram));
}