public async void AwaitMulticastRequest()
{
try
{
//Listen on port 4568 since its Unicast and cant be bound to port 4567 (in use for multicast)
using (var client = new UdpClient(MulticastEndPoint.Port, AddressFamily.InterNetwork))
{
client.Ttl = 2;
client.JoinMulticastGroup(MulticastEndPoint.Address);
client.Client.ReceiveBufferSize = 18;
var ipEndPoint = new IPEndPoint(IPAddress.Loopback, MulticastEndPoint.Port);
while (true)
{
Debug.WriteLine("Awaiting multicast request");
var result = await client.ReceiveAsync();
var stateProtocol = StateProtocol.FromBytes(result.Buffer);
//Check if reply is an actual discovery reply
if (stateProtocol.ProtocolType == ProtocolRequest.DeviceDiscovery)
{
if (ipEndPoint.Address.Equals(IPAddress.Parse("127.0.0.1")))
{
return;
}
var robeatsDevice = new RobeatsDevice
{
Id = stateProtocol.DeviceId,
Name = stateProtocol.DeviceName,
EndPoint = new IPEndPoint(ipEndPoint.Address, 4568),
StateProtocol = stateProtocol
};
OnDeviceDetect(new DeviceDiscoveryEventArgs {
RobeatsDevice = robeatsDevice
});
}
else
{
Debug.WriteLine("Not a reply. ignoring");
}
}
}
}
catch (Exception e)
{
Debug.WriteLine(e);
}
}
public void SendDiscoveryReply(RobeatsDevice device)
{
//Check if reply is an actual discovery reply
if (device.StateProtocol.ProtocolType == ProtocolRequest.DeviceDiscovery)
{
var stateProtocolReply =
new StateProtocol(ProtocolRequest.DeviceDiscoveryReply, device.Name, device.Id);
var bytesReply = stateProtocolReply.ToBytes();
var clientReply = new UdpClient(AddressFamily.InterNetwork)
{
Ttl = 2
};
Debug.WriteLine($"Sending DR: {device.EndPoint}");
clientReply.Send(bytesReply, bytesReply.Length, (IPEndPoint)device.EndPoint);
clientReply.Close();
}
else
{
Debug.WriteLine("Not a discoveryRequest. ignoring");
}
}
/// <summary>
/// Send a request to a specific <see cref="IPEndPoint"/>
/// </summary>
/// <param name="requestType"></param>
/// <param name="robeatsDevice"></param>
public void SendRequest(ProtocolRequest requestType, RobeatsDevice robeatsDevice)
{
if (!Visible)
{
return;
}
UdpHelper udpHelper;
if (requestType == ProtocolRequest.DeviceDiscovery)
{
udpHelper = new UdpHelper(MulticastEndPoint);
}
else
{
var ipEndPoint = new IPEndPoint(((IPEndPoint)robeatsDevice.EndPoint).Address, 4568);
udpHelper = new UdpHelper(ipEndPoint);
}
var stateProtocol = new StateProtocol(requestType, robeatsDevice.Name, robeatsDevice.Id);
Debug.WriteLine("Sending request of type: " + requestType);
udpHelper.Send(stateProtocol.ToBytes());
udpHelper.Close();
}
public async void AwaitDiscoveryReply()
{
try
{
using (var client = new UdpClient(4568, AddressFamily.InterNetwork))
{
while (true)
{
Debug.WriteLine("Awaiting DR");
var result = await client.ReceiveAsync();
Debug.WriteLine("Received DR");
var stateProtocol = StateProtocol.FromBytes(result.Buffer);
if (stateProtocol.ProtocolType == ProtocolRequest.DeviceDiscoveryReply)
{
var robeatsDevice = new RobeatsDevice
{
Id = stateProtocol.DeviceId,
Name = stateProtocol.DeviceName,
/*EndPoint = client.Client.RemoteEndPoint,*/
StateProtocol = stateProtocol
};
OnDiscoveryReply(new DeviceDiscoveryEventArgs {
RobeatsDevice = robeatsDevice
});
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}