protected void CloseConnection(object state)
{
CloseConnectionParam param = (CloseConnectionParam)state;
if (param.CloseEvent == null)
{
Thread.Sleep(param.Timeout);
}
else
{
param.CloseEvent.WaitOne(param.Timeout);
}
param.Socket.Close();
if (DiscoveryFinished != null)
{
DiscoveryFinished(this, EventArgs.Empty);
}
}
public void Probe(IPAddress address)
{
DiscoverySocket socket = new DiscoverySocket(endPointLocal);
bool multicast = IsMulticast(address);
if (multicast)
{
socket.JoinMulticastGroup(address);
}
string probe = BuildProbeMessage();
IPEndPoint endpoint = new IPEndPoint(address, WS_DISCOVER_PORT);
socket.Send(endpoint, probe);
socket.MessageReceived += OnMessageReceived;
socket.Listen();
CloseConnectionParam task = new CloseConnectionParam(socket, WS_DISCOVER_MULTICAST_TIMEOUT);
if (!multicast)
{
task.CloseEvent = socket.AnswerReceivedEvent;
}
ThreadPool.QueueUserWorkItem(CloseConnection, task);
}