drv/bluetooth_stm32_cc2640: handle macOS 12 request

It looks like macOS 12 issues a new request we have't seen before:
a Read By Type Request for the Device Name UUID. This was causing
a connection failure in Pybricks Code. Since the hub never sent a
response to this request, the OS would timeout and disconnect.

This fixes the issue by handling the request. Plus an error response
is now sent for unhandled UUIDs (as per the Bluetooth spec) to prevent
similar problems in the future.

Fixes: pybricks/support#489

Author: dlech

CHANGELOG.md

@@ -15,6 +15,7 @@
   user script ends ([support#456]).
 - Hub reset due to watchdog timer when writing data to UART I/O device
   ([support#304]).
+- City/Technic hubs not connecting via Bluetooth on macOS 12 ([support#489]).
 
 ### Changed:
 - Updated to MicroPython v1.17.
@@ -23,6 +24,7 @@
 [support#439]: https://github.com/pybricks/support/issues/439
 [support#440]: https://github.com/pybricks/support/issues/440
 [support#456]: https://github.com/pybricks/support/issues/456
+[support#489]: https://github.com/pybricks/support/issues/489
 
 ## [3.1.0a4] - 2021-08-30
 

lib/pbio/drv/bluetooth/bluetooth_stm32_cc2640.c

@@ -872,9 +872,31 @@ static void handle_event(uint8_t *packet) {
                                 ATT_ErrorRsp(connection_handle, &rsp);
                             }
                             break;
-                        default:
+
+                        case DEVICE_NAME_UUID: {
+                            attReadByTypeRsp_t rsp;
+                            uint8_t buf[ATT_MTU_SIZE - 2];
+                            uint8_t hub_name_len = strlen(pbdrv_bluetooth_hub_name);
+
+                            pbio_set_uint16_le(&buf[0], gap_service_handle + 2);
+                            memcpy(&buf[2], pbdrv_bluetooth_hub_name, hub_name_len);
+                            rsp.pDataList = buf;
+                            rsp.dataLen = hub_name_len + 2;
+                            ATT_ReadByTypeRsp(connection_handle, &rsp);
+                        }
+                        break;
+
+                        default: {
+                            attErrorRsp_t rsp;
+
+                            rsp.reqOpcode = ATT_READ_BY_TYPE_REQ;
+                            rsp.handle = start_handle;
+                            rsp.errCode = ATT_ERR_ATTR_NOT_FOUND;
+                            ATT_ErrorRsp(connection_handle, &rsp);
+
                             DBG("unhandled read by type req: %04X", type);
-                            break;
+                        }
+                        break;
                     }
                 }
                 break;