Fixed position admin messages (#3490)

* Bespoke admin messages for setting and clearing fixed positions

* Add guards against remote admin messages setting things

* Flip ifs

src/modules/AdminModule.cpp

@@ -17,6 +17,7 @@
 #include "unistd.h"
 #endif
 #include "Default.h"
+#include "TypeConversions.h"
 
 #if !MESHTASTIC_EXCLUDE_MQTT
 #include "mqtt/MQTT.h"
@@ -205,6 +206,31 @@ bool AdminModule::handleReceivedProtobuf(const meshtastic_MeshPacket &mp, meshta
         }
         break;
     }
+    case meshtastic_AdminMessage_set_fixed_position_tag: {
+        if (fromOthers) {
+            LOG_INFO("Ignoring set_fixed_position command from another node.\n");
+        } else {
+            LOG_INFO("Client is receiving a set_fixed_position command.\n");
+            meshtastic_NodeInfoLite *node = nodeDB->getMeshNode(nodeDB->getNodeNum());
+            node->has_position = true;
+            node->position = TypeConversions::ConvertToPositionLite(r->set_fixed_position);
+            nodeDB->setLocalPosition(r->set_fixed_position);
+            config.position.fixed_position = true;
+            saveChanges(SEGMENT_DEVICESTATE | SEGMENT_CONFIG, false);
+        }
+        break;
+    }
+    case meshtastic_AdminMessage_remove_fixed_position_tag: {
+        if (fromOthers) {
+            LOG_INFO("Ignoring remove_fixed_position command from another node.\n");
+        } else {
+            LOG_INFO("Client is receiving a remove_fixed_position command.\n");
+            nodeDB->clearLocalPosition();
+            config.position.fixed_position = false;
+            saveChanges(SEGMENT_DEVICESTATE | SEGMENT_CONFIG, false);
+        }
+        break;
+    }
     case meshtastic_AdminMessage_enter_dfu_mode_request_tag: {
         LOG_INFO("Client is requesting to enter DFU mode.\n");
 #if defined(ARCH_NRF52) || defined(ARCH_RP2040)