Fetch Bluetooth LE HID device info from Windows devnode properties

libusb · Jul 22, 2021 · 8666d0c · 8666d0c
1 parent 0d9672a
commit 8666d0c
Showing 1 changed file with 42 additions and 0 deletions.
diff --git a/windows/hid.c b/windows/hid.c
@@ -426,7 +426,48 @@ int HID_API_EXPORT hid_exit(void)
 	return 0;
 }
 
+static void hid_internal_get_ble_info(struct hid_device_info* dev, DEVINST dev_node)
 {
+	ULONG len;
+	CONFIGRET cr;
+	DEVPROPTYPE property_type;
+
+	static DEVPROPKEY DEVPKEY_NAME = { { 0xb725f130, 0x47ef, 0x101a, 0xa5, 0xf1, 0x02, 0x60, 0x8c, 0x9e, 0xeb, 0xac }, 10 }; // DEVPROP_TYPE_STRING
+	static DEVPROPKEY PKEY_DeviceInterface_Bluetooth_DeviceAddress = { { 0x2BD67D8B, 0x8BEB, 0x48D5, 0x87, 0xE0, 0x6C, 0xDA, 0x34, 0x28, 0x04, 0x0A }, 1 }; // DEVPROP_TYPE_STRING
+	static DEVPROPKEY PKEY_DeviceInterface_Bluetooth_Manufacturer = { { 0x2BD67D8B, 0x8BEB, 0x48D5, 0x87, 0xE0, 0x6C, 0xDA, 0x34, 0x28, 0x04, 0x0A }, 4 }; // DEVPROP_TYPE_STRING
+
+	/* Manufacturer String */
+	len = 0;
+	cr = CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_Manufacturer, &property_type, NULL, &len, 0);
+	if (cr == CR_BUFFER_SMALL && property_type == DEVPROP_TYPE_STRING) {
+		free(dev->manufacturer_string);
+		dev->manufacturer_string = (wchar_t*)calloc(len, sizeof(BYTE));
+		CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_Manufacturer, &property_type, (PBYTE)dev->manufacturer_string, &len, 0);
+	}
+
+	/* Serial Number String (MAC Address) */
+	len = 0;
+	cr = CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_DeviceAddress, &property_type, NULL, &len, 0);
+	if (cr == CR_BUFFER_SMALL || property_type == DEVPROP_TYPE_STRING) {
+		free(dev->serial_number);
+		dev->serial_number = (wchar_t*)calloc(len, sizeof(BYTE));
+		CM_Get_DevNode_PropertyW(dev_node, &PKEY_DeviceInterface_Bluetooth_DeviceAddress, &property_type, (PBYTE)dev->serial_number, &len, 0);
+	}
+
+	/* Get devnode grandparent to reach out Bluetooth LE device node */
+	cr = CM_Get_Parent(&dev_node, dev_node, 0);
+	if (cr != CR_SUCCESS)
+		return;
+
+	/* Product String */
+	len = 0;
+	cr = CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_NAME, &property_type, NULL, &len, 0);
+	if (cr == CR_BUFFER_SMALL || property_type == DEVPROP_TYPE_STRING) {
+		free(dev->product_string);
+		dev->product_string = (wchar_t*)calloc(len, sizeof(BYTE));
+		CM_Get_DevNode_PropertyW(dev_node, &DEVPKEY_NAME, &property_type, (PBYTE)dev->product_string, &len, 0);
+	}
+}
 
 static void hid_internal_get_info(struct hid_device_info* dev)
 {
@@ -507,6 +548,7 @@ static void hid_internal_get_info(struct hid_device_info* dev)
 	/* Bluetooth LE HID device */
 	if (wcsstr(device_id, L"BTHLEDEVICE\\") != 0) {
 		dev->bus_type = HID_BUS_BLUETOOTH;
+		hid_internal_get_ble_info(dev, dev_node);
 		goto close;
 	}