The autopair plugin tries standard pincodes for different devices with dumb
pincodes. It also generates a random 6 digit pincode for keyboards that
support any pincode but fallbacks to the agent call in case the random
generated pincode didn't work.
---
Makefile.plugins | 3 ++
plugins/autopair.c | 145 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 148 insertions(+)
create mode 100644 plugins/autopair.c
diff --git a/Makefile.plugins b/Makefile.plugins
index f497782..651a970 100644
--- a/Makefile.plugins
+++ b/Makefile.plugins
@@ -5,6 +5,9 @@ builtin_sources += plugins/hostname.c
builtin_modules += wiimote
builtin_sources += plugins/wiimote.c
+builtin_modules += autopair
+builtin_sources += plugins/autopair.c
+
if MAINTAINER_MODE
builtin_modules += gatt_example
builtin_sources += plugins/gatt-example.c
diff --git a/plugins/autopair.c b/plugins/autopair.c
new file mode 100644
index 0000000..40b8f8b
--- /dev/null
+++ b/plugins/autopair.c
@@ -0,0 +1,145 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2012-2013 Google Inc.
+ *
+ *
+ * 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 <stdbool.h>
+#include <stdlib.h>
+
+#include <bluetooth/bluetooth.h>
+#include <glib.h>
+
+#include "plugin.h"
+#include "adapter.h"
+#include "device.h"
+#include "log.h"
+#include "storage.h"
+
+/*
+ * Plugin to handle automatic pairing of devices with reduced user
+ * interaction, including implementing the recommendation of the HID spec
+ * for keyboard devices.
+ *
+ * The plugin works by intercepting the PIN request for devices; if the
+ * device is a keyboard a random six-digit numeric PIN is generated and
+ * returned, flagged for displaying using DisplayPinCode.
+ *
+ */
+
+static ssize_t autopair_pincb(struct btd_adapter *adapter,
+ struct btd_device *device,
+ char *pinbuf, gboolean *display,
+ int count)
+{
+ char addr[18];
+ char pinstr[7];
+ uint32_t class;
+
+ ba2str(device_get_address(device), addr);
+
+ class = btd_device_get_class(device);
+
+ DBG("device %s 0x%x", addr, class);
+
+ /* This is a class-based pincode guesser. Ignore devices with an unknown
+ * class. */
+ if (class == 0)
+ return 0;
+
+ switch ((class & 0x1f00) >> 8) {
+ case 0x04: /* Audio/Video */
+ switch ((class & 0xfc) >> 2) {
+ case 0x01: /* Wearable Headset Device */
+ case 0x02: /* Hands-free Device */
+ case 0x06: /* Headphones */
+ case 0x07: /* Portable Audio */
+ case 0x0a: /* HiFi Audio Device */
+ if (count == 0)
+ memcpy(pinbuf, "0000", 4);
+ else if (count == 1)
+ memcpy(pinbuf, "1234", 4);
+ else
+ return 0;
+ return 4;
+ break;
+ }
+ break;
+ case 0x05: /* Peripheral */
+ switch ((class & 0xc0) >> 6) {
+ case 0x01: /* Keyboard */
+ case 0x03: /* Combo keyboard/pointing device */
+ if (count > 0)
+ return 0;
+ srand(time(NULL));
+ snprintf(pinstr, sizeof pinstr, "%06d",
+ rand() % 1000000);
+ *display = TRUE;
+ memcpy(pinbuf, pinstr, 6);
+ return 6;
+ break;
+ case 0x02: /* Pointing device */
+ if (count > 0)
+ return 0;
+ memcpy(pinbuf, "0000", 4);
+ return 4;
+ break;
+ }
+ break;
+ }
+
+ return 0;
+}
+
+
+static int autopair_probe(struct btd_adapter *adapter)
+{
+ btd_adapter_register_pin_cb(adapter, autopair_pincb);
+
+ return 0;
+}
+
+static void autopair_remove(struct btd_adapter *adapter)
+{
+ btd_adapter_unregister_pin_cb(adapter, autopair_pincb);
+}
+
+static struct btd_adapter_driver autopair_driver = {
+ .name = "autopair",
+ .probe = autopair_probe,
+ .remove = autopair_remove,
+};
+
+static int autopair_init(void)
+{
+ return btd_register_adapter_driver(&autopair_driver);
+}
+
+static void autopair_exit(void)
+{
+ btd_unregister_adapter_driver(&autopair_driver);
+}
+
+BLUETOOTH_PLUGIN_DEFINE(autopair, VERSION,
+ BLUETOOTH_PLUGIN_PRIORITY_DEFAULT, autopair_init, autopair_exit)
--
1.8.1.3
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