android/bluetooth: Add unpaired device callback

GATT, HID, HOG, might be interested in the fact that some device has
been unpaired in order to clear cache or similar. This patch adds means
to register and unregister callback for unpaired event.

1 files changed, 48 insertions, 3 deletions

diff --git a/android/bluetooth.c b/android/bluetooth.c
index 96f610162..99e2aabd0 100644
--- a/android/bluetooth.c
+++ b/android/bluetooth.c
@@ -41,6 +41,7 @@
 #include "lib/uuid.h"
 #include "src/shared/util.h"
 #include "src/shared/mgmt.h"
+#include "src/shared/queue.h"
 #include "src/eir.h"
 #include "lib/sdp.h"
 #include "lib/sdp_lib.h"
@@ -223,6 +224,8 @@ static struct ipc *hal_ipc = NULL;
 
 static bool kernel_conn_control = false;
 
+static struct queue *unpaired_cb_list = NULL;
+
 static void get_device_android_addr(struct device *dev, uint8_t *addr)
 {
 	/*
@@ -1700,6 +1703,24 @@ void bt_auto_connect_remove(const bdaddr_t *addr)
 	error("Failed to remove device");
 }
 
+static bool match_by_value(const void *data, const void *user_data)
+{
+	return data == user_data;
+}
+
+bool bt_unpaired_register(bt_unpaired_device_cb cb)
+{
+	if (queue_find(unpaired_cb_list, match_by_value, cb))
+		return false;
+
+	return queue_push_head(unpaired_cb_list, cb);
+}
+
+void bt_unpaired_unregister(bt_unpaired_device_cb cb)
+{
+	queue_remove(unpaired_cb_list, cb);
+}
+
 static bool rssi_above_threshold(int old, int new)
 {
 	/* only 8 dBm or more */
@@ -4325,6 +4346,14 @@ failed:
 									status);
 }
 
+static void send_unpaired_notification(void *data, void *user_data)
+{
+	bt_unpaired_device_cb cb = data;
+	struct mgmt_addr_info *addr = user_data;
+
+	cb(&addr->bdaddr, addr->type);
+}
+
 static void unpair_device_complete(uint8_t status, uint16_t length,
 					const void *param, void *user_data)
 {
@@ -4342,6 +4371,10 @@ static void unpair_device_complete(uint8_t status, uint16_t length,
 
 	update_device_state(dev, rp->addr.type, HAL_STATUS_SUCCESS, false,
 								false, false);
+
+	/* Cast rp->addr to (void *) since queue_foreach don't take const */
+	queue_foreach(unpaired_cb_list, send_unpaired_notification,
+							(void *)&rp->addr);
 }
 
 static void handle_remove_bond_cmd(const void *buf, uint16_t len)
@@ -5126,6 +5159,12 @@ bool bt_bluetooth_register(struct ipc *ipc, uint8_t mode)
 
 	DBG("mode 0x%x", mode);
 
+	unpaired_cb_list = queue_new();
+	if (!unpaired_cb_list) {
+		error("Can not allocate queue for unpaired callbacks");
+		return false;
+	}
+
 	missing_settings = adapter.current_settings ^
 					adapter.supported_settings;
 
@@ -5141,7 +5180,7 @@ bool bt_bluetooth_register(struct ipc *ipc, uint8_t mode)
 		/* Fail if controller does not support LE */
 		if (!(adapter.supported_settings & MGMT_SETTING_LE)) {
 			error("LE Mode not supported by controller");
-			return false;
+			goto failed;
 		}
 
 		/* If LE it is not yet enabled then enable it */
@@ -5156,7 +5195,7 @@ bool bt_bluetooth_register(struct ipc *ipc, uint8_t mode)
 		/* Fail if controller does not support BR/EDR */
 		if (!(adapter.supported_settings & MGMT_SETTING_BREDR)) {
 			error("BR/EDR Mode not supported");
-			return false;
+			goto failed;
 		}
 
 		/* Enable BR/EDR if it is not enabled */
@@ -5174,7 +5213,7 @@ bool bt_bluetooth_register(struct ipc *ipc, uint8_t mode)
 		break;
 	default:
 		error("Unknown mode 0x%x", mode);
-		return false;
+		goto failed;
 	}
 
 	hal_ipc = ipc;
@@ -5183,6 +5222,10 @@ bool bt_bluetooth_register(struct ipc *ipc, uint8_t mode)
 						G_N_ELEMENTS(cmd_handlers));
 
 	return true;
+
+failed:
+	queue_destroy(unpaired_cb_list, NULL);
+	return false;
 }
 
 void bt_bluetooth_unregister(void)
@@ -5197,4 +5240,6 @@ void bt_bluetooth_unregister(void)
 
 	ipc_unregister(hal_ipc, HAL_SERVICE_ID_CORE);
 	hal_ipc = NULL;
+
+	queue_destroy(unpaired_cb_list, NULL);
 }