v5.1.6 can't connect to the printer on the SonicPad via Ethernet.

[CalDymos]

Unfortunately, adding a LAN printer does not work in version 4.3.8 or in the new version 5.1.6.
When I go to the “Device” tab and search for the printer (which is connected via the SonicPad) via “Scan Add”, the SonicPad is found. If I now select the printer via the checkbox and click on Add, the checkbox is unchecked again and nothing else happens.
If I now try to add the printer via “Manual Add” using the IP address, the error message “The printer could not be found!” appears after approx. 5 seconds.
However, the SonicPad is accessible via the browser, as well as Fluidd and Mainsail.
After analyzing the network traffic using Wireshark and reviewing the source code. (unfortunately only the source code up to version 5.0.3 is available here). I noticed that only WLAN connections (“wlan0”) are checked or queried and no Ethernet connections (“eth0” or “enps”).

Here is the relevant code snippet from the file RemotePrinterManager.cpp

...
...			
m_pKlipperInterface->getSystemInfo(session.ipAddress, session.port, [=](const std::string& ret, RemotePrinterSession printerSession) {
									RemotePrinterSession session(printerSession);
									if (ret.size() > 0)
									{
										rapidjson::Document doc;
										doc.Parse(ret.c_str());
										if (doc.HasParseError()) return;

										if (doc.HasMember("result") && doc["result"].IsObject())
										{
											const rapidjson::Value& objectResult = doc["result"];
											if (objectResult.HasMember("system_info") && objectResult["system_info"].IsObject())
											{
												const rapidjson::Value& objectSystemInfo = objectResult["system_info"];
												if (objectSystemInfo.HasMember("network") && objectSystemInfo["network"].IsObject())
												{
													const rapidjson::Value& objectNetwork = objectSystemInfo["network"];
													if (objectNetwork.HasMember("wlan0") && objectNetwork["wlan0"].IsObject())
													{
														const rapidjson::Value& objectWlan0 = objectNetwork["wlan0"];
														if (objectWlan0.HasMember("mac_address") && objectWlan0["mac_address"].IsString())
														{
															session.macAddress = objectWlan0["mac_address"].GetString();
															session.macAddress = session.macAddress + "_" + std::to_string(session.printerId);
														}
													}
												}
											}
										}
...
...

Please add Ethernet adapters to the query!

[CalDymos]

If you provide the latest source code, I can make the changes and create a pull request