Fix reporting on broadcast address

src/modules/mavlink/mavlink_main.cpp

@@ -178,6 +178,8 @@ Mavlink::Mavlink() :
 	_myaddr{},
 	_src_addr{},
 	_bcast_addr{},
+	_src_addr_initialized(false),
+	_broadcast_reported(false),
 #endif
 	_socket_fd(-1),
 	_protocol(SERIAL),
@@ -888,7 +890,10 @@ Mavlink::send_message(const uint8_t msgid, const void *msg, uint8_t component_ID
 			int bret = sendto(_socket_fd, buf, packet_len, 0, (struct sockaddr *)&_bcast_addr, sizeof(_bcast_addr));
 
 			if (bret <= 0) {
+				if (!_broadcast_reported) {
 					PX4_WARN("sending broadcast failed, errno: %d: %s", errno, strerror(errno));
+					_broadcast_reported = true;
+				}
 			}
 		}
 

src/modules/mavlink/mavlink_main.h

@@ -435,6 +435,7 @@ private:
 	struct sockaddr_in _src_addr;
 	struct sockaddr_in _bcast_addr;
 	bool _src_addr_initialized;
+	bool _broadcast_reported;
 
 #endif
 	int _socket_fd;