Fix handling of Satellite Tracker device settings

plugins/feature/satellitetracker/readme.md

@@ -210,4 +210,4 @@ And how to set the target:
 
 Or, to set the device settings:
 
-    curl -X PATCH "http://127.0.0.1:8091/sdrangel/featureset/0/feature/0/settings" -d '{"featureType": "SatelliteTracker",  "SatelliteTrackerSettings": {  "deviceSettings": [ {  "satellite": "ISS",  "deviceSettings": [ { "deviceSet": "R0", "doppler": [1], "frequency": 0, "presetDescription": Sat", "presetFrequency": 145.825, "presetGroup": "ISS Digi", "startOnAOS": 1, "startStopFileSinks": 1, "stopOnLOS": 1}] } ] }}'
+    curl -X PATCH "http://127.0.0.1:8091/sdrangel/featureset/0/feature/0/settings" -d '{"featureType": "SatelliteTracker",  "SatelliteTrackerSettings": {  "deviceSettings": [ {  "satellite": "ISS",  "deviceSettings": [ { "deviceSet": "R0", "doppler": [0], "frequency": 0, "presetDescription": Sat", "presetFrequency": 145.825, "presetGroup": "ISS Digi", "startOnAOS": 1, "startStopFileSinks": 1, "stopOnLOS": 1}] } ] }}'

plugins/feature/satellitetracker/satellitedevicesettingsgui.cpp

@@ -94,7 +94,14 @@ SatelliteDeviceSettingsGUI::SatelliteDeviceSettingsGUI(SatelliteTrackerSettings:
     addChannels();
 
     for (int i = 0; i < devSettings->m_doppler.size(); i++)
-        m_dopplerItems[devSettings->m_doppler[i]]->setData(Qt::Checked, Qt::CheckStateRole);
+    {
+        int idx = devSettings->m_doppler[i];
+        if (idx < m_dopplerItems.size()) {
+            m_dopplerItems[idx]->setData(Qt::Checked, Qt::CheckStateRole);
+        } else {
+            qDebug() << "SatelliteDeviceSettingsGUI - Doppler index " << idx << " out of range: " << m_dopplerItems.size();
+        }
+    }
 
     // Start on AOS
     m_startOnAOSWidget = new QCheckBox();

plugins/feature/satellitetracker/satellitetracker.cpp

@@ -431,6 +431,16 @@ QList<SWGSDRangel::SWGSatelliteDeviceSettingsList*>* SatelliteTracker::getSWGSat
     return deviceSettingsList;
 }
 
+// Dereference a potentionally null string
+static QString getString(QString *sp)
+{
+    QString s;
+    if (sp != nullptr) {
+        s = *sp;
+    }
+    return s;
+}
+
 // Convert Swagger device settings to struct SatelliteDeviceSettings
 QHash<QString, QList<SatelliteTrackerSettings::SatelliteDeviceSettings *> *> SatelliteTracker::getSatelliteDeviceSettings(QList<SWGSDRangel::SWGSatelliteDeviceSettingsList*>* list)
 {
@@ -449,17 +459,19 @@ QHash<QString, QList<SatelliteTrackerSettings::SatelliteDeviceSettings *> *> Sat
                 for (int j = 0; j < swgDeviceSettingsList->size(); j++)
                 {
                     SatelliteTrackerSettings::SatelliteDeviceSettings *deviceSettings = new SatelliteTrackerSettings::SatelliteDeviceSettings();
-                    deviceSettings->m_deviceSet = *swgDeviceSettingsList->at(j)->getDeviceSet();
+                    deviceSettings->m_deviceSet = getString(swgDeviceSettingsList->at(j)->getDeviceSet());
-                    deviceSettings->m_presetGroup = *swgDeviceSettingsList->at(j)->getPresetGroup();
+                    deviceSettings->m_presetGroup = getString(swgDeviceSettingsList->at(j)->getPresetGroup());
                     deviceSettings->m_presetFrequency = swgDeviceSettingsList->at(j)->getPresetFrequency();
-                    deviceSettings->m_presetDescription = *swgDeviceSettingsList->at(j)->getPresetDescription();
+                    deviceSettings->m_presetDescription = getString(swgDeviceSettingsList->at(j)->getPresetDescription());
+                    if (swgDeviceSettingsList->at(j)->getDoppler()) {
                         deviceSettings->m_doppler = *swgDeviceSettingsList->at(j)->getDoppler();
+                    }
                     deviceSettings->m_startOnAOS = swgDeviceSettingsList->at(j)->getStartOnAos();
                     deviceSettings->m_stopOnLOS = swgDeviceSettingsList->at(j)->getStopOnLos();
                     deviceSettings->m_startStopFileSink = swgDeviceSettingsList->at(j)->getStartStopFileSinks();
                     deviceSettings->m_frequency = swgDeviceSettingsList->at(j)->getFrequency();
-                    deviceSettings->m_aosCommand = *swgDeviceSettingsList->at(j)->getAosCommand();
+                    deviceSettings->m_aosCommand = getString(swgDeviceSettingsList->at(j)->getAosCommand());
-                    deviceSettings->m_losCommand = *swgDeviceSettingsList->at(j)->getLosCommand();
+                    deviceSettings->m_losCommand = getString(swgDeviceSettingsList->at(j)->getLosCommand());
                     deviceSettingsList->append(deviceSettings);
                 }
                 hash.insert(satellite, deviceSettingsList);