GCS_Common: add support for sending COMPONENT_INFORMATION

Author: peterbarker

libraries/GCS_MAVLink/GCS.h

@@ -405,6 +405,8 @@ class GCS_MAVLINK
     void send_flight_information();
 #endif
 
+    void send_component_information() const;
+
     // lock a channel, preventing use by MAVLink
     void lock(bool _lock) {
         _locked = _lock;

libraries/GCS_MAVLink/GCS_Common.cpp

@@ -1203,7 +1203,8 @@ ap_message GCS_MAVLINK::mavlink_id_to_ap_message_id(const uint32_t mavlink_id) c
         { MAVLINK_MSG_ID_AVAILABLE_MODES_MONITOR, MSG_AVAILABLE_MODES_MONITOR},
 #if AP_MAVLINK_MSG_FLIGHT_INFORMATION_ENABLED
         { MAVLINK_MSG_ID_FLIGHT_INFORMATION, MSG_FLIGHT_INFORMATION},
-#endif
+#endif  // AP_MAVLINK_MSG_FLIGHT_INFORMATION_ENABLED
+        { MAVLINK_MSG_ID_COMPONENT_INFORMATION, MSG_COMPONENT_INFORMATION},
     };
 
     for (uint8_t i=0; i<ARRAY_SIZE(map); i++) {
@@ -6335,6 +6336,21 @@ bool GCS_MAVLINK::send_available_mode_monitor()
     return true;
 }
 
+void GCS_MAVLINK::send_component_information() const
+{
+    const char *general_metadata_url = "mftp:/@SYS/general_metadata.json";
+    const uint32_t general_metadata_checksum = 133761337;
+
+    mavlink_msg_component_information_send(
+        chan,
+        AP_HAL::millis(),
+        general_metadata_checksum,
+        general_metadata_url,
+        0,  // -1?
+        ""
+        );
+}
+
 bool GCS_MAVLINK::try_send_message(const enum ap_message id)
 {
     bool ret = true;
@@ -6738,6 +6754,11 @@ bool GCS_MAVLINK::try_send_message(const enum ap_message id)
     }
 #endif
 
+    case MSG_COMPONENT_INFORMATION:
+        CHECK_PAYLOAD_SIZE(COMPONENT_INFORMATION);
+        send_component_information();
+        break;
+
 #if AP_MAVLINK_MSG_UAVIONIX_ADSB_OUT_STATUS_ENABLED
     case MSG_UAVIONIX_ADSB_OUT_STATUS:
         CHECK_PAYLOAD_SIZE(UAVIONIX_ADSB_OUT_STATUS);

libraries/GCS_MAVLink/ap_message.h

@@ -113,5 +113,6 @@ enum ap_message : uint8_t {
 #if AP_MAVLINK_MSG_FLIGHT_INFORMATION_ENABLED
     MSG_FLIGHT_INFORMATION             = 100,
 #endif
+    MSG_COMPONENT_INFORMATION,
     MSG_LAST // MSG_LAST must be the last entry in this enum
 };