mDNS Support (#1452)

* Allow build, if no grabbers are enabled

* Align available functions to right Qt version

* Update to next development version

* Align available functions to right Qt version

* fix workflows (apt/nightly)

* Disable QNetworkConfigurationManager deprecation warnings

* Initial go on Smart Pointers

* Add Deallocation

* Correct QT_WARNING_DISABLE_DEPRECATED (available since 5.9)

* Cluster Build Variables

* Hyperion Light

* Address build warnings

* Hyperion Light - UI

* Update Protobuf to latest master

* Removed compiler warnings

* Added restart ability to systray

* Correct Protobuf

* Ignore 'no-return' warning on protobuf build

* hyperion-remote: Fix auto discovery of hyperion server

* Fix Qt version override

* Update changelog

* Remove Grabber Components, if no Grabber exists

* Standalone Grabber - Fix fps default

* Remote Control - Have Source Selction accrosswhole screen

* Enable Blackborder detection only, if relevant input sources available

* Enable Blackborder detection only, if relevant input sources available

* Remote UI - rearrange containers

* Checkout

* Fix compilation on windows

* Re-added qmdnsengine template cmake

* chrono added for linux

* Removed existing AVAHI/Bonjour, allow to enable/disable mDNS

* hyperiond macos typo fix

* Fix macOS Bundle build

* Fix macOS bundle info details

* Correct CMake files

* Removed existing AVAHI/Bonjour (2)

* Share hyperion's services via mDNS

* Add mDNS Browser and mDNS for LED-Devices

* Support mDNS discovery for standalone grabbers

* Remove ZLib Dependency & Cleanup

* mDNS - hanle 2.local2 an ".local." domains equally

* Hue - Link discovery to bridge class, workaround port 443 for mDNS discovery

* Fix save button state when switching between devices

* Removed sessions (of other hyperions)

* mDNS Publisher - Simplify service naming

* mDNS refactoring & Forwarder discovery

* mDNS Updates to use device service name

* Consistency of standalone grabbers with mDNS Service Registry

* Merge branch 'hyperion-project:master' into mDNS

* Start JSON and WebServers only after Instance 0 is available

* Remove bespoke qDebug Output again

* MDNS updates and refactor Forwarder

* Minor updates

* Upgrade to CMake 3.1

* typo

* macOS fix

* Correct merge

* - Remove dynamic linker flag from standalone dispmanX Grabber
- Added ability to use system qmdns libs

* Cec handler library will load at runtime

* typo fix

* protobuf changes

* mDNS changes for Windows/macOS

* test window build qmdnsengine

* absolute path to protobuf cmake dir

* Rework Hue Wizard supporting mDNS

* LED-Devices - Retry support + Refactoring (excl. Hue)

* LED-Devices - Refactoring/Retry support Hue + additional alignments

* Address LGTM findings

* Fix CI-Build, revert test changes

* Build Windows in Release mode to avoid python problem

* Correct that WebServerObject is available earlier

* Ensure that instance name in logs for one instance are presented

* Update content LEDs

* Rework mDNS Address lookup

* Fix LED UI

* Fix for non mDNS Services (ignore default port)

* Disbale device when now input is available

* Revert back some updates, ensure last color is updated when switched on

* Handle reopening case and changed IP, port for API-calls

* Add UPD-DDP Device

* WLED support for DDP

* Fix printout

* LEDDevice - Allow more retries, udapte defaults

* LED-Net Devices - Select Custom device, if configured

Co-authored-by: Paulchen Panther <16664240+Paulchen-Panther@users.noreply.github.com>
Co-authored-by: Paulchen Panther <Paulchen-Panter@protonmail.com>

libsrc/leddevice/dev_net/LedDeviceUdpE131.cpp

@@ -8,6 +8,13 @@
 
 // hyperion local includes
 #include "LedDeviceUdpE131.h"
+#include <utils/NetUtils.h>
+
+// Constants
+namespace {
+
+const char CONFIG_HOST[] = "host";
+const char CONFIG_PORT[] = "port";
 
 const ushort E131_DEFAULT_PORT = 5568;
 
@@ -23,6 +30,7 @@ const uint32_t VECTOR_E131_DATA_PACKET = 0x00000002;
 //#define E131_NETWORK_DATA_LOSS_TIMEOUT          2500       // milli econds
 //#define E131_DISCOVERY_UNIVERSE                 64214
 const int DMX_MAX = 512; // 512 usable slots
+}
 
 LedDeviceUdpE131::LedDeviceUdpE131(const QJsonObject &deviceConfig)
 	: ProviderUdp(deviceConfig)
@@ -36,13 +44,14 @@ LedDevice* LedDeviceUdpE131::construct(const QJsonObject &deviceConfig)
 
 bool LedDeviceUdpE131::init(const QJsonObject &deviceConfig)
 {
-	bool isInitOK = false;
-
-	_port = E131_DEFAULT_PORT;
+	bool isInitOK {false};
 
 	// Initialise sub-class
 	if ( ProviderUdp::init(deviceConfig) )
 	{
+		_hostName = _devConfig[ CONFIG_HOST ].toString();
+		_port = deviceConfig[CONFIG_PORT].toInt(E131_DEFAULT_PORT);
+
 		_e131_universe = deviceConfig["universe"].toInt(1);
 		_e131_source_name = deviceConfig["source-name"].toString("hyperion on "+QHostInfo::localHostName());
 		QString _json_cid = deviceConfig["cid"].toString("");
@@ -70,6 +79,23 @@ bool LedDeviceUdpE131::init(const QJsonObject &deviceConfig)
 	return isInitOK;
 }
 
+int LedDeviceUdpE131::open()
+{
+	int retval = -1;
+	_isDeviceReady = false;
+
+	if (NetUtils::resolveHostToAddress(_log, _hostName, _address))
+	{
+		if (ProviderUdp::open() == 0)
+		{
+			// Everything is OK, device is ready
+			_isDeviceReady = true;
+			retval = 0;
+		}
+	}
+	return retval;
+}
+
 // populates the headers
 void LedDeviceUdpE131::prepare(unsigned this_universe, unsigned this_dmxChannelCount)
 {