public void LightSetPower()
{
var expected = "2a 00 00 14 c0 65 74 0c d0 73 d5 28 b3 34 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 75 00 00 00 ff ff c8 00 00 00";
var message = LifxMessage.CreateTargeted(new LightSetPowerRequest(true, 200), 208954816, false, false, 1, new byte[] { 0xd0, 0x73, 0xd5, 0x28, 0xb3, 0x34, 0, 0 }, null);
var actual = FormatBytes(GetBytes(message));
Assert.AreEqual(expected, actual);
}
private byte[] GetBytes(LifxMessage message)
{
using (var memoryStream = new MemoryStream())
{
message.WriteToStream(memoryStream);
return(memoryStream.ToArray());
}
}
public void GetService()
{
var expected = "24 00 00 34 4c e5 c1 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00";
var message = LifxMessage.CreateBroadcast(new GetServiceRequest(), 113370444, false, false, 0);
var actual = FormatBytes(GetBytes(message));
Assert.AreEqual(expected, actual);
}
/// <summary>
/// The listner clients message recieved event handler.
/// This is where the message will be converted into a LifxMessage and will invoke the MessageRecieved event handler if anything is subscribed to it
/// </summary>
/// <param name="sender">The socket that recieved the packet</param>
/// <param name="args">Where the packet information is contained</param>
private void lifxCommunicatorClient_MessageReceived(DatagramSocket sender, DatagramSocketMessageReceivedEventArgs args)
{
if (IsDisposed)
{
return;
}
uint bufferArraySize = args.GetDataReader().UnconsumedBufferLength;
Byte[] receiveBytes = new Byte[bufferArraySize];
args.GetDataReader().ReadBytes(receiveBytes);
LifxDataPacket packet = new LifxDataPacket(receiveBytes);
LifxMessage receivedMessage = LifxHelper.PacketToMessage(packet);
if (receivedMessage != null) // Check to make sure the packet we recieved was sent from a LIFX bulb, others can be sending on the same port
{
// If the packet type is a pan gateway we need to handle this a bit differently
if (receivedMessage.PacketType == MessagePacketType.PanGateway)
{
// This locks the variable and lets any senders will waiting for a pan gateway know that we have received the message and you can stop retrying
lock (commandsAwaitingResponse)
{
// Ensure that there are senders awaiting a message
if (commandsAwaitingResponse.ContainsKey(receivedMessage.PacketType))
{
commandsAwaitingResponse[receivedMessage.PacketType] = receivedMessage; // Sets the reply (from bulb) message to this message
messageResumer[receivedMessage.PacketType].Release(); // Stops the senders from retrying to ask for pan gateway messages
}
}
// Sets up the pan handler class and assigns the bulb to it
LifxPanController foundPanHandler = new LifxPanController()
{
MACAddress = LifxHelper.ByteArrayToString(receivedMessage.ReceivedData.PanControllerMac),
IPAddress = args.RemoteAddress.DisplayName
};
foundPanHandler.Bulbs.Add(new LifxBulb(foundPanHandler, args.RemoteAddress.DisplayName, LifxHelper.ByteArrayToString(receivedMessage.ReceivedData.PanControllerMac)));
// Invoke the PanControllerFound event handler
PanControllerFound.Invoke(this, foundPanHandler);
return;
}
// If the incoming packet isn't a pan controller, just lock the variable
// and lets any senders that may be waiting for a return message know that we have received the message and you can stop retrying
lock (commandsAwaitingResponse)
{
// If there is someone waiting for a recieved message, i.e. the command is *meant* to receive something from the bulb
// let it know we have found it (Release) and assign the message to the varaible
// Otherwise we have received a LifxMessage we didn't ask for. Ensure that there is someone subscribed to the event handler and Invoke with the message
if (commandsAwaitingResponse.ContainsKey(receivedMessage.PacketType))
{
commandsAwaitingResponse[receivedMessage.PacketType] = receivedMessage;
messageResumer[receivedMessage.PacketType].Release();
}
else
{
if (MessageRecieved != null)
{
MessageRecieved.Invoke(this, receivedMessage);
}
}
}
}
}
/// <summary>
/// Sends a command to the specified IP address
/// </summary>
/// <param name="command">The command to send</param>
/// <param name="bulbMacAddress">The MAC address of the bulb that will receive the command (used for mesh networking)</param>
/// <param name="panControllerMacAddress">The pan controller MAC address that will receive the command (used for mesh networking)</param>
/// <param name="remoteIPAddress">The IP address that will physically receive the command first</param>
/// <returns>Returns a message if the command is expecting one, otherwise will return null <see cref="LifxCommand.ExpectedReturnMessagePacketType"/></returns>
private async Task <LifxMessage> SendCommand(LifxCommand command, string bulbMacAddress, string panControllerMacAddress, string remoteIPAddress)
{
if (!IsInitialized)
{
throw new InvalidOperationException("The communicator needs to be initialized before sending a command.");
}
// If the command requires a reply message handle it accordingly (TCP over UDP essentially) otherwise just send the command
if (command.ExpectedReturnMessagePacketType != MessagePacketType.Unknown)
{
// This locks and sets up the variable
lock (commandsAwaitingResponse)
{
// If it contains a key already don't create a new one, use an old one
// TODO: This is to ensure for example if a user spams a GetLightState command, if we receive one LightStateMessage all the commands that are waiting will be dropped
// bar one, that returns the message
if (!commandsAwaitingResponse.ContainsKey(command.ExpectedReturnMessagePacketType))
{
commandsAwaitingResponse.Add(command.ExpectedReturnMessagePacketType, null);
messageResumer.Add(command.ExpectedReturnMessagePacketType, new SemaphoreSlim(0));
}
}
do
{
LifxMessage returnedMessage = null;
SemaphoreSlim resumerSemaphore = null;
lock (commandsAwaitingResponse)
{
commandsAwaitingResponse.TryGetValue(command.ExpectedReturnMessagePacketType, out returnedMessage);
messageResumer.TryGetValue(command.ExpectedReturnMessagePacketType, out resumerSemaphore);
}
// Send command then wait for reply. If Semephore times out then subtract one from retry count and send again
// Otherwise if there is a response heard from the device remove the values from the varaibles and return the message received
if (returnedMessage == null)// && resumerSemaphore != null)
{
if (await SendCommandRaw(command, bulbMacAddress, panControllerMacAddress, remoteIPAddress))
{
// If a response has come in then the wait command will return true
if (!resumerSemaphore.Wait(command.WaitTimeBetweenRetry))
{
command.RetryCount--;
}
}
// If the retry count reaches 0 and the command is required to, or want a reply and none is heard from then throw an exception
if (command.RetryCount == 0 && command.NeedReplyMessage)
{
throw new TimeoutException("No response heard from light in required time");
}
}
else
{
commandsAwaitingResponse.Remove(command.ExpectedReturnMessagePacketType);
messageResumer.Remove(command.ExpectedReturnMessagePacketType);
return(returnedMessage);
}
} while (command.RetryCount > 0); // Continue to loop if no response is head and the reply count is not zero yet
}
else
{
await SendCommandRaw(command, bulbMacAddress, panControllerMacAddress, remoteIPAddress);
return(null);
}
return(null);
}
