Add a wifi hal interface to read-back the APF memory.

        "IWifiChipEventCallback.hal",

        "IWifiNanIface.hal",

        "IWifiNanIfaceEventCallback.hal",

        "IWifiStaIface.hal",

    ],

    interfaces: [

        "android.hardware.wifi@1.0",

/*

 * Copyright 2018 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package android.hardware.wifi@1.2;

import @1.0::WifiStatus;

import @1.0::IWifiStaIface;

/**

 * Interface used to represent a single STA iface.

 *

 * IWifiChip.createStaIface() may return a @1.2::IWifiStaIface when supported.

 */

interface IWifiStaIface extends @1.0::IWifiStaIface {

    /**

     * Fetches a consistent snapshot of the entire APF program and working

     * memory buffer and returns it to the host. The returned buffer contains

     * both code and data. Its length must match the most recently returned

     * |StaApfPacketFilterCapabilities.maxLength|.

     *

     * While the snapshot is being fetched, the APF intepreter must not execute

     * and all incoming packets must be passed to the host as if there was no

     * APF program installed.

     *

     * Must fail with |WifiStatusCode.ERROR_NOT_SUPPORTED| if

     * |StaIfaceCapabilityMask.APF| is not set.

     *

     * @return status WifiStatus of the operation.

     *         Possible status codes:

     *         |WifiStatusCode.SUCCESS|,

     *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,

     *         |WifiStatusCode.ERROR_NOT_SUPPORTED|,

     *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,

     *         |WifiStatusCode.ERROR_UNKNOWN|

     * @return data The entire APF working memory buffer when status is

     *         |WifiStatusCode.SUCCESS|, empty otherwise.

     * @see getApfPacketFilterCapabilities()

     * @see installApfPacketFilter()

     */

    readApfPacketFilterData() generates (WifiStatus status, vec<uint8_t> data);

};