wifi/1.0/IWifiStaIface.hal

/*
 * Copyright 2016 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@1.0;

import IWifiIface;
import IWifiStaIfaceEventCallback;

/**
 * Interface used to represent a single STA iface.
 */
interface IWifiStaIface extends IWifiIface {
  /**
   * Mask of capabilities suported by this Iface.
   */
  enum StaIfaceCapabilityMask : uint32_t {
    /**
     * If set indicates that the APF APIs are supported.
     * APF (Android Packet Filter) is a BPF like packet filtering
     * bytecode executed by the firmware.
     */
    APF = 1 << 0,
    /**
     * If set indicates that the Background Scan APIs are supported.
     * Background scan allow the host to send a number of buckets down to the
     * firmware. Each bucket contains a set of channels, a period, and some
     * parameters about how and when to report results.
     */
    BACKGROUND_SCAN = 1 << 1,
    /**
     * If set indicates that the link layer stats APIs are supported.
     */
    LINK_LAYER_STATS = 1 << 2,
  };

  /**
   * Requests notifications of significant events on this iface. Multiple calls
   * to this must register multiple callbacks each of which must receive all
   * events.
   *
   * @param callback An instance of the |IWifiStaIfaceEventCallback| HIDL interface
   *        object.
   * @return status WifiStatus of the operation.
   *         Possible status codes:
   *         |WifiStatusCode.SUCCESS|,
   *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|
   */
  registerEventCallback(IWifiStaIfaceEventCallback callback)
      generates (WifiStatus status);

  /**
   * Get the capabilities supported by this STA iface.
   *
   * @return status WifiStatus of the operation.
   *         Possible status codes:
   *         |WifiStatusCode.SUCCESS|,
   *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
   *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
   *         |WifiStatusCode.ERROR_UNKNOWN|
   * @return capabilities Bitset of |StaIfaceCapabilityMask| values.
   */
  getCapabilities() generates (WifiStatus status, uint32_t capabilities);

  /**
   * Used to query additional information about the chip's APF capabilities.
   * Must fail 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 capabilities Instance of |StaApfPacketFilterCapabilities|.
   */
  getApfPacketFilterCapabilities()
      generates (WifiStatus status, StaApfPacketFilterCapabilities capabilities);

  /**
   * Installs an APF program on this iface, replacing an existing
   * program if present.
   * Must fail if |StaIfaceCapabilityMask.APF| is not set.
   *
   * @param cmdId command Id to use for this invocation.
   * @param APF Program to be set.
   * @return status WifiStatus of the operation.
   *         Possible status codes:
   *         |WifiStatusCode.SUCCESS|,
   *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
   *         |WifiStatusCode.ERROR_INVALID_ARGS|,
   *         |WifiStatusCode.ERROR_NOT_SUPPORTED|,
   *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
   *         |WifiStatusCode.ERROR_UNKNOWN|
   */
  installApfPacketFilter(CommandId cmdId, vec<uint8_t> program)
      generates (WifiStatus status);

  /**
   * Used to query additional information about the chip's Background Scan capabilities.
   * Must fail if |StaIfaceCapabilityMask.BACKGROUND_SCAN| 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 capabilities Instance of |StaBackgroundScanCapabilities|.
   */
  getBackgroundScanCapabilities()
      generates (WifiStatus status, StaBackgroundScanCapabilities capabilities);

  /**
   * Used to query the list of valid frequencies (depending on country code set)
   * for the provided band. These channels may be specifed in the
   * |BackgroundScanBucketParameters.frequenciesInMhz| for a background scan
   * request.
   * Must fail if |StaIfaceCapabilityMask.BACKGROUND_SCAN| is not set.
   *
   * @param band Band for which the frequency list is being generated.
   * @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 frequencies vector of valid frequencies for the provided band.
   */
  getValidFrequenciesForBackgroundScan(StaBackgroundScanBand band)
      generates (WifiStatus status, vec<WifiChannelInMhz> frequencies);

  /**
   * Start a background scan using the given cmdId as an identifier. Only one
   * active background scan need be supported.
   * Must fail if |StaIfaceCapabilityMask.BACKGROUND_SCAN| is not set.
   *
   * When this is called all requested buckets must be scanned, starting the
   * beginning of the cycle.
   *
   * For example:
   * If there are two buckets specified
   *  - Bucket 1: period=10s
   *  - Bucket 2: period=20s
   *  - Bucket 3: period=30s
   * Then the following scans must occur
   *  - t=0  buckets 1, 2, and 3 are scanned
   *  - t=10 bucket 1 is scanned
   *  - t=20 bucket 1 and 2 are scanned
   *  - t=30 bucket 1 and 3 are scanned
   *  - t=40 bucket 1 and 2 are scanned
   *  - t=50 bucket 1 is scanned
   *  - t=60 buckets 1, 2, and 3 are scanned
   *  - and the patter repeats
   *
   * If any scan does not occur or is incomplete (error, interrupted, etc) then
   * a cached scan result must still be recorded with the
   * WIFI_SCAN_FLAG_INTERRUPTED flag set.
   *
   * @param cmdId command Id to use for this invocation.
   * @params Background scan parameters.
   * @return status WifiStatus of the operation.
   *         Possible status codes:
   *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
   *         |WifiStatusCode.ERROR_INVALID_ARGS|,
   *         |WifiStatusCode.ERROR_NOT_SUPPORTED|,
   *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
   *         |WifiStatusCode.ERROR_UNKNOWN|
   */
  startBackgroundScan(CommandId cmdId, StaBackgroundScanParameters params)
      generates (WifiStatus status);

  /**
   * Stop the background scan started.
   * Must fail if |StaIfaceCapabilityMask.BACKGROUND_SCAN| is not set.
   *
   * @param cmdId command Id corresponding to the request.
   * @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|
   */
  stopBackgroundScan(CommandId cmdId) generates (WifiStatus status);

  /**
   * Enable link layer stats collection.
   * Must fail if |StaIfaceCapabilityMask.LINK_LAYER_STATS| is not set.
   *
   * Radio statistics (once started) must not stop until disabled.
   * Iface statistics (once started) reset and start afresh after each
   * connection until disabled.
   *
   * @param debug Set for field debug mode. Driver must collect all
   *        statistics regardless of performance impact.
   * @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|
   */
  enableLinkLayerStatsCollection(bool debug)
      generates (WifiStatus status);

  /**
   * Disable link layer stats collection.
   * Must fail if |StaIfaceCapabilityMask.LINK_LAYER_STATS| 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|
   */
  disableLinkLayerStatsCollection() generates (WifiStatus status);

  /**
   * Retrieve the latest link layer stats.
   * Must fail if |StaIfaceCapabilityMask.LINK_LAYER_STATS| is not set or if
   * link layer stats collection hasn't been explicitly enabled.
   *
   * @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 stats Instance of |LinkLayerStats|.
   */
  getLinkLayerStats() generates (WifiStatus status, StaLinkLayerStats stats);
};