Add an API to set the link timeout.

This fixes the problem where the car dock is
powered on and off pretty quickly.

Change-Id: I8724641b8c337019f089b005cb236fc90549cf6f

core/java/android/server/BluetoothEventLoop.java

@@ -374,6 +374,11 @@ class BluetoothEventLoop {
             Intent intent = null;
             if (propValues[1].equals("true")) {
                 intent = new Intent(BluetoothDevice.ACTION_ACL_CONNECTED);
+                // Set the link timeout to 8000 slots (5 sec timeout)
+                // for bluetooth docks.
+                if (mBluetoothService.isBluetoothDock(address)) {
+                    mBluetoothService.setLinkTimeout(address, 8000);
+                }
             } else {
                 intent = new Intent(BluetoothDevice.ACTION_ACL_DISCONNECTED);
             }

core/java/android/server/BluetoothService.java

@@ -1910,6 +1910,13 @@ public class BluetoothService extends IBluetooth.Stub {
         return path;
     }
 
+    /*package */ void setLinkTimeout(String address, int num_slots) {
+        String path = getObjectPathFromAddress(address);
+        boolean result = setLinkTimeoutNative(path, num_slots);
+
+        if (!result) log("Set Link Timeout to:" + num_slots + " slots failed");
+    }
+
     private static void log(String msg) {
         Log.d(TAG, msg);
     }
@@ -1953,4 +1960,5 @@ public class BluetoothService extends IBluetooth.Stub {
     private native int addRfcommServiceRecordNative(String name, long uuidMsb, long uuidLsb,
             short channel);
     private native boolean removeServiceRecordNative(int handle);
+    private native boolean setLinkTimeoutNative(String path, int num_slots);
 }

core/jni/android_server_BluetoothService.cpp

@@ -861,6 +861,26 @@ static jboolean removeServiceRecordNative(JNIEnv *env, jobject object, jint hand
     return JNI_FALSE;
 }
 
+static jboolean setLinkTimeoutNative(JNIEnv *env, jobject object, jstring object_path,
+                                     jint num_slots) {
+    LOGV(__FUNCTION__);
+#ifdef HAVE_BLUETOOTH
+    native_data_t *nat = get_native_data(env, object);
+    if (nat) {
+        const char *c_object_path = env->GetStringUTFChars(object_path, NULL);
+        DBusMessage *reply = dbus_func_args(env, nat->conn,
+                           get_adapter_path(env, object),
+                           DBUS_ADAPTER_IFACE, "SetLinkTimeout",
+                           DBUS_TYPE_OBJECT_PATH, &c_object_path,
+                           DBUS_TYPE_UINT32, &num_slots,
+                           DBUS_TYPE_INVALID);
+        env->ReleaseStringUTFChars(object_path, c_object_path);
+        return reply ? JNI_TRUE : JNI_FALSE;
+    }
+#endif
+    return JNI_FALSE;
+}
+
 static JNINativeMethod sMethods[] = {
      /* name, signature, funcPtr */
     {"classInitNative", "()V", (void*)classInitNative},
@@ -905,6 +925,7 @@ static JNINativeMethod sMethods[] = {
     {"discoverServicesNative", "(Ljava/lang/String;Ljava/lang/String;)Z", (void *)discoverServicesNative},
     {"addRfcommServiceRecordNative", "(Ljava/lang/String;JJS)I", (void *)addRfcommServiceRecordNative},
     {"removeServiceRecordNative", "(I)Z", (void *)removeServiceRecordNative},
+    {"setLinkTimeoutNative", "(Ljava/lang/String;I)Z", (void *)setLinkTimeoutNative},
 };
 
 int register_android_server_BluetoothService(JNIEnv *env) {