private void ResponseReceived(UdpReceiveResult ar) //IAsyncResult ar)
{
var remote = ar.RemoteEndPoint; //new IPEndPoint(IPAddress.Any, 0);
var bytes = ar.Buffer; // udp.EndReceive(ar, ref remote);
string value = new DatagramPacket(bytes).Decode();
var typeBytes = new DatagramPacket(BeaconType).Encode().ToList(); //Beacon.Encode(BeaconType).ToList();
Debug.WriteLine(string.Join(", ", typeBytes.Select(_ => (char)_)));
if (Beacon.HasPrefix(bytes, typeBytes))
{
try
{
var portBytes = bytes.Skip(typeBytes.Count()).Take(2).ToArray();
var port = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(portBytes, 0));
var payload = new DatagramPacket(bytes.Skip(typeBytes.Count() + 2)).Decode(); //Beacon.Decode(bytes.Skip(typeBytes.Count() + 2));
NewBeacon(new Core.BeaconLocation(new IPEndPoint(remote.Address, port), payload, DateTime.Now));
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
//udp.BeginReceive(ResponseReceived, null);
Listen();
}
private void BroadcastProbe()
{
var probe = new DatagramPacket(BeaconType).Encode().ToArray(); //Beacon.Encode(BeaconType).ToArray();
udp.SendAsync(probe, probe.Length, new IPEndPoint(IPAddress.Broadcast, Beacon.DiscoveryPort));
//udp.Send(probe, probe.Length, new IPEndPoint(IPAddress.Broadcast, Beacon.DiscoveryPort));
}
private void ProbeReceived(UdpReceiveResult ar) //IAsyncResult ar)
{
var remote = ar.RemoteEndPoint; //new IPEndPoint(IPAddress.Any, 0);
var bytes = ar.Buffer;
// Compare beacon type to probe type
var typeBytes = new DatagramPacket(this._config.BeaconType).Encode();
if (HasPrefix(bytes, typeBytes))
{
// If true, respond again with our type, port and payload
var responseData = new DatagramPacket(this._config.BeaconType).Encode() //Encode(BeaconType)
.Concat(BitConverter.GetBytes((ushort)IPAddress.HostToNetworkOrder((short)this._config.AdvertisedPort)))
.Concat(new DatagramPacket(this._config.BeaconData).Encode()).ToArray();
//udp.Send(responseData, responseData.Length, remote);
var data = new DatagramPacket(responseData).Decode();
udp.SendAsync(responseData, responseData.Length, remote);
}
if (!Stopped)
{
Listen(); // udp.BeginReceive(ProbeReceived, null);
}
}