/// <summary>
/// start at the specified endpoint<para/>
/// the underlayer transport must be TcpServer, UdpServer or NetbiosServer.
/// </summary>
/// <param name="localEndPoint">
/// an object that specifies the listener.
/// </param>
/// <exception cref="ObjectDisposedException">
/// thrown when this object is disposed.
/// </exception>
/// <exception cref="ArgumentNullException">
/// thrown when localEndPoint is null.
/// </exception>
/// <exception cref="ArgumentException">
/// thrown when localEndPoint is not an IPEndPoint/port.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the specified endpoint has been started.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when localEndPoint is an int port, but the LocalIpAddress is not configured.
/// </exception>
public void Start(object localEndPoint)
{
if (disposed)
{
throw new ObjectDisposedException("UdpServerTransport");
}
if (localEndPoint == null)
{
throw new ArgumentNullException("localEndPoint");
}
IPEndPoint requiredLocalEP = localEndPoint as IPEndPoint;
if (requiredLocalEP == null)
{
requiredLocalEP = Utility.GetEndPointByPort(this.socketConfig, localEndPoint);
}
if (this.listeners.ContainsKey(requiredLocalEP))
{
throw new InvalidOperationException("the specified endpoint has been started.");
}
bool isLspHooked;
bool isBlocking;
StackTransportType type = this.socketConfig.Type;
// get the replaced endpoint from LSP.
IPEndPoint actualListenedLocalEP =
LspConsole.Instance.GetReplacedEndPoint(type, requiredLocalEP, out isLspHooked, out isBlocking);
UdpClient udpClient = new UdpClient(actualListenedLocalEP);
UdpServerListener listener = new UdpServerListener(udpClient, this, isLspHooked);
// if LSP is enabled, intercept the traffic
if (isLspHooked)
{
LspConsole.Instance.InterceptTraffic(
type, isBlocking, requiredLocalEP, udpClient.Client.LocalEndPoint as IPEndPoint);
}
listener.Start(requiredLocalEP);
this.listeners[requiredLocalEP] = listener;
this.started = true;
}
/// <summary>
/// stop the specified listener.<para/>
/// the underlayer transport must be TcpServer, UdpServer or NetbiosServer.
/// </summary>
/// <param name="localEndPoint">
/// an object that specifies the listener.
/// </param>
/// <exception cref="ObjectDisposedException">
/// thrown when this object is disposed.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the server is not started, must invoke Start() first.
/// </exception>
/// <exception cref="ArgumentNullException">
/// thrown when remoteEndPoint is null.
/// </exception>
/// <exception cref="ArgumentException">
/// thrown when the specified endpoint is not an IPEndPoint/port.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the udp client is not connected to server, must invoke Start() first.
/// </exception>
public void Stop(object localEndPoint)
{
if (disposed)
{
throw new ObjectDisposedException("UdpServerTransport");
}
if (!this.started)
{
throw new InvalidOperationException("server is not started, must invoke Start() first.");
}
if (localEndPoint == null)
{
throw new ArgumentNullException("localEndPoint");
}
IPEndPoint endpoint = localEndPoint as IPEndPoint;
if (endpoint == null)
{
Utility.StopTransportByPort(this, this.listeners.Keys, null, localEndPoint);
return;
}
if (!this.listeners.ContainsKey(endpoint))
{
throw new InvalidOperationException("the listener specified by endpoint cannot be found!");
}
UdpServerListener listener = this.listeners[endpoint];
if (listener == null)
{
throw new InvalidOperationException("the listener specified by endpoint is null!");
}
if (listener.IsLspHooked)
{
LspConsole.Instance.UnblockTraffic(listener.LspHookedLocalEP, this.socketConfig.Type);
}
listener.Stop();
this.listeners.Remove(endpoint);
}
/// <summary>
/// start at the specified endpoint<para/>
/// the underlayer transport must be TcpServer, UdpServer or NetbiosServer.
/// </summary>
/// <param name="localEndPoint">
/// an object that specifies the listener.
/// </param>
/// <exception cref="ObjectDisposedException">
/// thrown when this object is disposed.
/// </exception>
/// <exception cref="ArgumentNullException">
/// thrown when localEndPoint is null.
/// </exception>
/// <exception cref="ArgumentException">
/// thrown when localEndPoint is not an IPEndPoint/port.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the specified endpoint has been started.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when localEndPoint is an int port, but the LocalIpAddress is not configured.
/// </exception>
public void Start(object localEndPoint)
{
if (disposed)
{
throw new ObjectDisposedException("UdpServerTransport");
}
if (localEndPoint == null)
{
throw new ArgumentNullException("localEndPoint");
}
IPEndPoint requiredLocalEP = localEndPoint as IPEndPoint;
if (requiredLocalEP == null)
{
requiredLocalEP = Utility.GetEndPointByPort(this.socketConfig, localEndPoint);
}
if (this.listeners.ContainsKey(requiredLocalEP))
{
throw new InvalidOperationException("the specified endpoint has been started.");
}
bool isLspHooked;
bool isBlocking;
StackTransportType type = this.socketConfig.Type;
// get the replaced endpoint from LSP.
IPEndPoint actualListenedLocalEP =
LspConsole.Instance.GetReplacedEndPoint(type, requiredLocalEP, out isLspHooked, out isBlocking);
UdpClient udpClient = new UdpClient(actualListenedLocalEP);
UdpServerListener listener = new UdpServerListener(udpClient, this, isLspHooked);
// if LSP is enabled, intercept the traffic
if (isLspHooked)
{
LspConsole.Instance.InterceptTraffic(
type, isBlocking, requiredLocalEP, udpClient.Client.LocalEndPoint as IPEndPoint);
}
listener.Start(requiredLocalEP);
this.listeners[requiredLocalEP] = listener;
this.started = true;
}
/// <summary>
/// Send arbitrary message to a special remote host.<para/>
/// the transport must be UdpServer
/// </summary>
/// <param name="localEndPoint">
/// an object that specifies the local endpoint to send bytes.
/// </param>
/// <param name="remoteEndPoint">
/// an object that specifies the target endpoint to which send bytes.
/// </param>
/// <param name="message">
/// a bytes array that contains the bytes to send to target.
/// </param>
/// <exception cref="ObjectDisposedException">
/// thrown when this object is disposed.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the server is not started, must invoke Start() first.
/// </exception>
/// <exception cref="ArgumentNullException">
/// thrown when remoteEndPoint is null.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when udp server is not start, must invoke Start() first.
/// </exception>
/// <exception cref="ArgumentException">
/// thrown when the specified endpoint is not an IPEndPoint.
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the underlayer udp transport specified by endpoint is invalid
/// </exception>
/// <exception cref="InvalidOperationException">
/// thrown when the listener on the specified localEndPoint does not exists,
/// please invoke Start(localEndPoint) to start it first.
/// </exception>
public void SendBytes(object localEndPoint, object remoteEndPoint, byte[] message)
{
if (disposed)
{
throw new ObjectDisposedException("UdpServerTransport");
}
if (!this.started)
{
throw new InvalidOperationException("server is not started, must invoke Start() first.");
}
if (remoteEndPoint == null)
{
throw new ArgumentNullException("remoteEndPoint");
}
if (this.listeners.Count == 0)
{
throw new InvalidOperationException("udp server is not start, must invoke Start() first.");
}
IPEndPoint remoteEP = remoteEndPoint as IPEndPoint;
if (remoteEP == null)
{
throw new ArgumentException("the specified endpoint is not an IPEndPoint.", "remoteEndPoint");
}
IPEndPoint localEP = localEndPoint as IPEndPoint;
if (localEP == null)
{
throw new ArgumentException("the specified endpoint is not an IPEndPoint.", "localEndPoint");
}
if (!this.listeners.ContainsKey(localEP))
{
throw new InvalidOperationException(
"the listener on the specified localEndPoint does not exists,"
+ " please invoke Start(localEndPoint) to start it first.");
}
UdpServerListener listener = this.listeners[localEP];
if (listener == null || listener.Listener == null)
{
throw new InvalidOperationException("the underlayer udp transport specified by endpoint is invalid");
}
IPEndPoint mappedEndPoint = null;
if (listener.IsLspHooked)
{
//replace the real client endpoint with lsp dll endpoint
mappedEndPoint =
LspConsole.Instance.GetMappedIPEndPoint(
(IPEndPoint)listener.Listener.Client.LocalEndPoint, remoteEP, StackTransportType.Udp);
if (mappedEndPoint != null)
{
//add udp header
message = ArrayUtility.ConcatenateArrays <byte>(Utility.CreateUdpHeader(remoteEP), message);
}
}
listener.Listener.Send(message, message.Length, mappedEndPoint == null ? remoteEP : mappedEndPoint);
}
