Add support for wiimote pairing

The Nintendo Wii Remote requires binary bluetooth addresses as PINs.
This is not possible via dbus agent API. So this adds a plugin that
registers a pin-callback and forces the right pin for every
authentication request of wiimotes.

1 files changed, 111 insertions, 0 deletions

diff --git a/plugins/wiimote.c b/plugins/wiimote.c
new file mode 100644
index 000000000..e60231b54
--- /dev/null
+++ b/plugins/wiimote.c
@@ -0,0 +1,111 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2011  David Herrmann <dh.herrmann@googlemail.com>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <bluetooth/bluetooth.h>
+
+#include "plugin.h"
+#include "adapter.h"
+#include "device.h"
+#include "log.h"
+#include "storage.h"
+
+/*
+ * Nintendo Wii Remote devices require the bdaddr of the host as pin input for
+ * authentication. This plugin registers a pin-callback and forces this pin
+ * to be used for authentication.
+ *
+ * There are two ways to place the wiimote into discoverable mode.
+ *  - Pressing the red-sync button on the back of the wiimote. This module
+ *    supports pairing via this method. Auto-reconnect should be possible after
+ *    the device was paired once.
+ *  - Pressing the 1+2 buttons on the front of the wiimote. This module does
+ *    not support this method since this method never enables auto-reconnect.
+ *    Hence, pairing is not needed. Use it without pairing if you want.
+ * After connecting the wiimote you should immediately connect to the input
+ * service of the wiimote. If you don't, the wiimote will close the connection.
+ * The wiimote waits about 5 seconds until it turns off again.
+ * Auto-reconnect is only enabled when pairing with the wiimote via the red
+ * sync-button and then connecting to the input service. If you do not connect
+ * to the input service, then auto-reconnect is not enabled.
+ * If enabled, the wiimote connects to the host automatically when any button
+ * is pressed.
+ */
+
+static ssize_t wii_pincb(struct btd_adapter *adapter, struct btd_device *device,
+								char *pinbuf)
+{
+	uint16_t vendor, product;
+	bdaddr_t sba, dba;
+	char src_addr[18], dst_addr[18];
+
+	adapter_get_address(adapter, &sba);
+	device_get_address(device, &dba);
+	ba2str(&sba, src_addr);
+	ba2str(&dba, dst_addr);
+
+	if (0 == read_device_id(src_addr, dst_addr, NULL, &vendor, &product,
+									NULL)) {
+		if (vendor == 0x057e && product == 0x0306) {
+			DBG("Forcing fixed pin on detected wiimote %s", dst_addr);
+			memcpy(pinbuf, &sba, 6);
+			return 6;
+		}
+	}
+
+	return 0;
+}
+
+static int wii_probe(struct btd_adapter *adapter)
+{
+	btd_adapter_register_pin_cb(adapter, wii_pincb);
+
+	return 0;
+}
+
+static void wii_remove(struct btd_adapter *adapter)
+{
+	btd_adapter_unregister_pin_cb(adapter, wii_pincb);
+}
+
+static struct btd_adapter_driver wii_driver = {
+	.name	= "wiimote",
+	.probe	= wii_probe,
+	.remove	= wii_remove,
+};
+
+static int wii_init(void)
+{
+	return btd_register_adapter_driver(&wii_driver);
+}
+
+static void wii_exit(void)
+{
+	btd_unregister_adapter_driver(&wii_driver);
+}
+
+BLUETOOTH_PLUGIN_DEFINE(wiimote, VERSION,
+		BLUETOOTH_PLUGIN_PRIORITY_LOW, wii_init, wii_exit)