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/jsonserver/JsonServer.cpp

@@ -1,37 +1,35 @@
 // system includes
 #include <stdexcept>
 
-// project includes
-#include "HyperionConfig.h"
-#include <jsonserver/JsonServer.h>
-#include "JsonClientConnection.h"
-
-// bonjour include
-#ifdef ENABLE_AVAHI
-#include <bonjour/bonjourserviceregister.h>
-#endif
-#include <utils/NetOrigin.h>
-
 // qt includes
 #include <QTcpServer>
 #include <QTcpSocket>
 #include <QJsonDocument>
 #include <QByteArray>
 
+// project includes
+#include "HyperionConfig.h"
+#include <jsonserver/JsonServer.h>
+#include "JsonClientConnection.h"
+
+#include <utils/NetOrigin.h>
+
+// Constants
+namespace {
+
+const char SERVICE_TYPE[] = "jsonapi";
+
+} //End of constants
+
 JsonServer::JsonServer(const QJsonDocument& config)
 	: QObject()
 	, _server(new QTcpServer(this))
 	, _openConnections()
 	, _log(Logger::getInstance("JSONSERVER"))
 	, _netOrigin(NetOrigin::getInstance())
+	, _config(config)
 {
 	Debug(_log, "Created instance");
-
-	// Set trigger for incoming connections
-	connect(_server, &QTcpServer::newConnection, this, &JsonServer::newConnection);
-
-	// init
-	handleSettingsUpdate(settings::JSONSERVER, config);
 }
 
 JsonServer::~JsonServer()
@@ -39,31 +37,29 @@ JsonServer::~JsonServer()
 	qDeleteAll(_openConnections);
 }
 
+void JsonServer::initServer()
+{
+	// Set trigger for incoming connections
+	connect(_server, &QTcpServer::newConnection, this, &JsonServer::newConnection);
+
+	// init
+	handleSettingsUpdate(settings::JSONSERVER, _config);
+}
+
 void JsonServer::start()
 {
-	if(_server->isListening())
-		return;
-
-	if (!_server->listen(QHostAddress::Any, _port))
+	if(!_server->isListening())
 	{
-		Error(_log,"Could not bind to port '%d', please use an available port", _port);
-		return;
+		if (!_server->listen(QHostAddress::Any, _port))
+		{
+			Error(_log,"Could not bind to port '%d', please use an available port", _port);
+		}
+		else
+		{
+			Info(_log, "Started on port %d", _port);
+			emit publishService(SERVICE_TYPE, _port);
+		}
 	}
-	Info(_log, "Started on port %d", _port);
-
-#ifdef ENABLE_AVAHI
-	if(_serviceRegister == nullptr)
-	{
-		_serviceRegister = new BonjourServiceRegister(this);
-		_serviceRegister->registerService("_hyperiond-json._tcp", _port);
-	}
-	else if( _serviceRegister->getPort() != _port)
-	{
-		delete _serviceRegister;
-		_serviceRegister = new BonjourServiceRegister(this);
-		_serviceRegister->registerService("_hyperiond-json._tcp", _port);
-	}
-#endif
 }
 
 void JsonServer::stop()