Fully implement Root and virutal Feature class

src/logid/backend/hidpp20/features/Root.cpp

@@ -4,22 +4,33 @@ using namespace logid::backend::hidpp20;
 
 Root::Root(Device* dev) : Feature(dev, ID)
 {
-
 }
 
 feature_info Root::getFeature(uint16_t feature_id)
 {
-    feature_info info;
+    feature_info info{};
     std::vector<uint8_t> params(2);
     params[0] = feature_id & 0xff;
     params[1] = (feature_id >> 8) & 0xff;
 
-    auto response = this->callFunction(Function::Ping, params);
+    auto response = this->callFunction(Function::GetFeature, params);
 
     info.feature_id = response[0];
+
+    if(!info.feature_id)
+        throw UnsupportedFeature(feature_id);
+
     info.hidden = response[1] & FeatureFlag::Hidden;
     info.obsolete = response[1] & FeatureFlag::Obsolete;
     info.internal = response[1] & FeatureFlag::Internal;
 
     return info;
+}
+
+std::tuple<uint8_t, uint8_t> Root::getVersion()
+{
+    std::vector<uint8_t> params(0);
+    auto response = this->callFunction(Function::Ping, params);
+
+    return std::make_tuple(response[0], response[1]);
 }

src/logid/backend/hidpp20/features/Root.h

@@ -23,7 +23,7 @@ namespace hidpp20
         Root(Device* device);
 
         feature_info getFeature (uint16_t feature_id);
-        void ping();
+        std::tuple<uint8_t, uint8_t> getVersion();
     private:
         enum FeatureFlag : uint8_t
         {