public bool Ping()
{
var commands = new[] { new EmptyPacketCommand()
{
Command = CommandType.Ping
} };
var packet = new ScoreboardPacket {
Commands = commands
};
using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)
{
ReceiveTimeout = 1000
})
{
try
{
socket.Connect(this.EndPoint);
socket.Send(packet.ToBytes());
var buffer = new byte[100];
socket.Receive(buffer);
var incoming = ScoreboardPacket.Parse(buffer);
return(incoming.Commands[0].Command == CommandType.Pong);
}
catch (Exception)
{
// If anything fails, return false.
return(false);
}
}
}
public void Listen(SettingsPanelViewModel sb)
{
if (this.listenThread != null)
{
if (this.listenThread.IsAlive)
{
this.StopListen = true;
while (this.listenThread.IsAlive)
{
Thread.Sleep(20);
}
}
}
this.StopListen = false;
IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
var endPoints = new List <IPEndPoint>();
foreach (var entry in hostEntry.AddressList)
{
if (entry.AddressFamily == AddressFamily.InterNetwork)
{
endPoints.Add(new IPEndPoint(entry, this.PortNumber));
break;
}
}
if (endPoints.Count == 0)
{
MessageBox.Show("No valid networks were found to connect to.");
return;
}
var socket = new Socket(endPoints[0].Address.AddressFamily, SocketType.Dgram, ProtocolType.Udp)
{
ReceiveTimeout = 5000
};
foreach (var e in endPoints)
{
socket.Bind(e);
}
this.listenThread = new Thread(
new ThreadStart(
delegate
{
while (this.StopListen == false)
{
var inBuffer = new byte[1000];
EndPoint senderRemote = new IPEndPoint(IPAddress.Any, 0);
try
{
socket.ReceiveFrom(inBuffer, ref senderRemote);
}
catch (SocketException ex)
{
int errorCode = ex.ErrorCode;
continue;
}
var packet = ScoreboardPacket.Parse(inBuffer);
foreach (var cmd in packet.Commands)
{
if (cmd.Command == CommandType.Ping)
{
var pongCmd = new EmptyPacketCommand {
Command = CommandType.Pong
};
var pongPacket = new ScoreboardPacket()
{
Commands = new[] { pongCmd }
};
socket.SendTo(pongPacket.ToBytes(), senderRemote);
}
}
this.dispatcher.BeginInvoke((Action)(() => sb.HandleRemoteCommands(packet, socket, senderRemote)));
}
socket.Close();
socket.Dispose();
}));
this.listenThread.Start();
this.IsListening = true;
}
