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Commit cb6dec2f authored by Roshan Pius's avatar Roshan Pius Committed by android-build-merger
Browse files

Merge "wifi: Add utility for struct conversions" am: 3ff50102 

am: d69b603b

Change-Id: I22c4393490446ca8e6468bc50f2cfc4528d4a429
parents 42792cd5 d69b603b

wifi/1.0/default/Android.mk

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@@ -18,6 +18,7 @@ LOCAL_MODULE := android.hardware.wifi@1.0-service 
LOCAL_MODULE_RELATIVE_PATH := hw

LOCAL_CPPFLAGS := -Wall -Wno-unused-parameter -Werror -Wextra

LOCAL_SRC_FILES := \

    hidl_struct_util.cpp \

    service.cpp \

    wifi.cpp \

    wifi_ap_iface.cpp \

wifi/1.0/default/hidl_struct_util.cpp

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/*

 * Copyright (C) 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.

 */



#include <android-base/logging.h>

#include <utils/SystemClock.h>



#include "hidl_struct_util.h"



namespace android {

namespace hardware {

namespace wifi {

namespace V1_0 {

namespace implementation {

namespace hidl_struct_util {



uint8_t ConvertHidlReportEventFlagToLegacy(

    StaBackgroundScanBucketEventReportSchemeMask hidl_flag) {

  using HidlFlag = StaBackgroundScanBucketEventReportSchemeMask;

  switch (hidl_flag) {

    case HidlFlag::EACH_SCAN:

      return REPORT_EVENTS_EACH_SCAN;

    case HidlFlag::FULL_RESULTS:

      return REPORT_EVENTS_FULL_RESULTS;

    case HidlFlag::NO_BATCH:

      return REPORT_EVENTS_NO_BATCH;

  };

}



bool convertHidlScanParamsToLegacy(

    const StaBackgroundScanParameters& hidl_scan_params,

    legacy_hal::wifi_scan_cmd_params* legacy_scan_params) {

  if (!legacy_scan_params) {

    return false;

  }

  legacy_scan_params->base_period = hidl_scan_params.basePeriodInMs;

  legacy_scan_params->max_ap_per_scan = hidl_scan_params.maxApPerScan;

  legacy_scan_params->report_threshold_percent =

      hidl_scan_params.reportThresholdPercent;

  legacy_scan_params->report_threshold_num_scans =

      hidl_scan_params.reportThresholdNumScans;

  // TODO(b/33194311): Expose these max limits in the HIDL interface.

  if (hidl_scan_params.buckets.size() > MAX_BUCKETS) {

    return false;

  }

  legacy_scan_params->num_buckets = hidl_scan_params.buckets.size();

  for (uint32_t bucket_idx = 0; bucket_idx < hidl_scan_params.buckets.size();

       bucket_idx++) {

    const StaBackgroundScanBucketParameters& hidl_bucket_spec =

        hidl_scan_params.buckets[bucket_idx];

    legacy_hal::wifi_scan_bucket_spec& legacy_bucket_spec =

        legacy_scan_params->buckets[bucket_idx];

    legacy_bucket_spec.bucket = bucket_idx;

    legacy_bucket_spec.band =

        static_cast<legacy_hal::wifi_band>(hidl_bucket_spec.band);

    legacy_bucket_spec.period = hidl_bucket_spec.periodInMs;

    legacy_bucket_spec.max_period = hidl_bucket_spec.exponentialMaxPeriodInMs;

    legacy_bucket_spec.base = hidl_bucket_spec.exponentialBase;

    legacy_bucket_spec.step_count = hidl_bucket_spec.exponentialStepCount;

    legacy_bucket_spec.report_events = 0;

    using HidlFlag = StaBackgroundScanBucketEventReportSchemeMask;

    for (const auto flag :

         {HidlFlag::EACH_SCAN, HidlFlag::FULL_RESULTS, HidlFlag::NO_BATCH}) {

      if (hidl_bucket_spec.eventReportScheme &

          static_cast<std::underlying_type<HidlFlag>::type>(flag)) {

        legacy_bucket_spec.report_events |=

            ConvertHidlReportEventFlagToLegacy(flag);

      }

    }

    // TODO(b/33194311): Expose these max limits in the HIDL interface.

    if (hidl_bucket_spec.frequencies.size() > MAX_CHANNELS) {

      return false;

    }

    legacy_bucket_spec.num_channels = hidl_bucket_spec.frequencies.size();

    for (uint32_t freq_idx = 0; freq_idx < hidl_bucket_spec.frequencies.size();

         freq_idx++) {

      legacy_bucket_spec.channels[freq_idx].channel =

          hidl_bucket_spec.frequencies[freq_idx];

    }

  }

  return true;

}



bool convertLegacyIeBlobToHidl(const uint8_t* ie_blob,

                               uint32_t ie_blob_len,

                               std::vector<WifiInformationElement>* hidl_ies) {

  if (!ie_blob || !hidl_ies) {

    return false;

  }

  const uint8_t* ies_begin = ie_blob;

  const uint8_t* ies_end = ie_blob + ie_blob_len;

  const uint8_t* next_ie = ies_begin;

  using wifi_ie = legacy_hal::wifi_information_element;

  constexpr size_t kIeHeaderLen = sizeof(wifi_ie);

  // Each IE should atleast have the header (i.e |id| & |len| fields).

  while (next_ie + kIeHeaderLen <= ies_end) {

    const wifi_ie& legacy_ie = (*reinterpret_cast<const wifi_ie*>(next_ie));

    uint32_t curr_ie_len = kIeHeaderLen + legacy_ie.len;

    if (next_ie + curr_ie_len > ies_end) {

      return false;

    }

    WifiInformationElement hidl_ie;

    hidl_ie.id = legacy_ie.id;

    hidl_ie.data =

        std::vector<uint8_t>(legacy_ie.data, legacy_ie.data + legacy_ie.len);

    hidl_ies->push_back(std::move(hidl_ie));

    next_ie += curr_ie_len;

  }

  // Ensure that the blob has been fully consumed.

  return (next_ie == ies_end);

}



bool convertLegacyScanResultToHidl(

    const legacy_hal::wifi_scan_result& legacy_scan_result,

    bool has_ie_data,

    StaScanResult* hidl_scan_result) {

  if (!hidl_scan_result) {

    return false;

  }

  hidl_scan_result->timeStampInUs = legacy_scan_result.ts;

  hidl_scan_result->ssid = std::vector<uint8_t>(

      legacy_scan_result.ssid,

      legacy_scan_result.ssid + sizeof(legacy_scan_result.ssid));

  memcpy(hidl_scan_result->bssid.data(),

         legacy_scan_result.bssid,

         hidl_scan_result->bssid.size());

  hidl_scan_result->frequency = legacy_scan_result.channel;

  hidl_scan_result->rssi = legacy_scan_result.rssi;

  hidl_scan_result->beaconPeriodInMs = legacy_scan_result.beacon_period;

  hidl_scan_result->capability = legacy_scan_result.capability;

  if (has_ie_data) {

    std::vector<WifiInformationElement> ies;

    if (!convertLegacyIeBlobToHidl(

            reinterpret_cast<const uint8_t*>(legacy_scan_result.ie_data),

            legacy_scan_result.ie_length,

            &ies)) {

      return false;

    }

    hidl_scan_result->informationElements = std::move(ies);

  }

  return true;

}



bool convertLegacyCachedScanResultsToHidl(

    const legacy_hal::wifi_cached_scan_results& legacy_cached_scan_result,

    StaScanData* hidl_scan_data) {

  if (!hidl_scan_data) {

    return false;

  }

  hidl_scan_data->flags = legacy_cached_scan_result.flags;

  hidl_scan_data->bucketsScanned = legacy_cached_scan_result.buckets_scanned;



  CHECK(legacy_cached_scan_result.num_results >= 0 &&

        legacy_cached_scan_result.num_results <= MAX_AP_CACHE_PER_SCAN);

  std::vector<StaScanResult> hidl_scan_results;

  for (int32_t result_idx = 0;

       result_idx < legacy_cached_scan_result.num_results;

       result_idx++) {

    StaScanResult hidl_scan_result;

    if (!convertLegacyScanResultToHidl(

            legacy_cached_scan_result.results[result_idx],

            false,

            &hidl_scan_result)) {

      return false;

    }

    hidl_scan_results.push_back(hidl_scan_result);

  }

  hidl_scan_data->results = std::move(hidl_scan_results);

  return true;

}



bool convertLegacyVectorOfCachedScanResultsToHidl(

    const std::vector<legacy_hal::wifi_cached_scan_results>&

        legacy_cached_scan_results,

    std::vector<StaScanData>* hidl_scan_datas) {

  if (!hidl_scan_datas) {

    return false;

  }

  for (const auto& legacy_cached_scan_result : legacy_cached_scan_results) {

    StaScanData hidl_scan_data;

    if (!convertLegacyCachedScanResultsToHidl(legacy_cached_scan_result,

                                              &hidl_scan_data)) {

      return false;

    }

    hidl_scan_datas->push_back(hidl_scan_data);

  }

  return true;

}



bool convertLegacyLinkLayerStatsToHidl(

    const legacy_hal::LinkLayerStats& legacy_stats,

    StaLinkLayerStats* hidl_stats) {

  if (!hidl_stats) {

    return false;

  }

  // iface legacy_stats conversion.

  hidl_stats->iface.beaconRx = legacy_stats.iface.beacon_rx;

  hidl_stats->iface.avgRssiMgmt = legacy_stats.iface.rssi_mgmt;

  hidl_stats->iface.wmeBePktStats.rxMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BE].rx_mpdu;

  hidl_stats->iface.wmeBePktStats.txMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BE].tx_mpdu;

  hidl_stats->iface.wmeBePktStats.lostMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BE].mpdu_lost;

  hidl_stats->iface.wmeBePktStats.retries =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BE].retries;

  hidl_stats->iface.wmeBkPktStats.rxMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BK].rx_mpdu;

  hidl_stats->iface.wmeBkPktStats.txMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BK].tx_mpdu;

  hidl_stats->iface.wmeBkPktStats.lostMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BK].mpdu_lost;

  hidl_stats->iface.wmeBkPktStats.retries =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_BK].retries;

  hidl_stats->iface.wmeViPktStats.rxMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VI].rx_mpdu;

  hidl_stats->iface.wmeViPktStats.txMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VI].tx_mpdu;

  hidl_stats->iface.wmeViPktStats.lostMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VI].mpdu_lost;

  hidl_stats->iface.wmeViPktStats.retries =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VI].retries;

  hidl_stats->iface.wmeVoPktStats.rxMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VO].rx_mpdu;

  hidl_stats->iface.wmeVoPktStats.txMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VO].tx_mpdu;

  hidl_stats->iface.wmeVoPktStats.lostMpdu =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VO].mpdu_lost;

  hidl_stats->iface.wmeVoPktStats.retries =

      legacy_stats.iface.ac[legacy_hal::WIFI_AC_VO].retries;

  // radio legacy_stats conversion.

  hidl_stats->radio.onTimeInMs = legacy_stats.radio.on_time;

  hidl_stats->radio.txTimeInMs = legacy_stats.radio.tx_time;

  hidl_stats->radio.rxTimeInMs = legacy_stats.radio.rx_time;

  hidl_stats->radio.onTimeInMsForScan = legacy_stats.radio.on_time_scan;

  hidl_stats->radio.txTimeInMsPerLevel = legacy_stats.radio_tx_time_per_levels;

  // Timestamp in the HAL wrapper here since it's not provided in the legacy

  // HAL API.

  hidl_stats->timeStampInMs = uptimeMillis();

  return true;

}

}  // namespace hidl_struct_util

}  // namespace implementation

}  // namespace V1_0

}  // namespace wifi

}  // namespace hardware

}  // namespace android

wifi/1.0/default/hidl_struct_util.h

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/*

 * Copyright (C) 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.

 */



#ifndef HIDL_STRUCT_UTIL_H_

#define HIDL_STRUCT_UTIL_H_



#include <vector>



#include <android/hardware/wifi/1.0/IWifi.h>



#include "wifi_legacy_hal.h"



/**

 * This file contains a bunch of functions to convert structs from the legacy

 * HAL to HIDL and vice versa.

 * TODO(b/32093047): Add unit tests for these conversion methods in the VTS test

 * suite.

 */

namespace android {

namespace hardware {

namespace wifi {

namespace V1_0 {

namespace implementation {

namespace hidl_struct_util {



// Convert hidl gscan params to legacy gscan params.

bool convertHidlScanParamsToLegacy(

    const StaBackgroundScanParameters& hidl_scan_params,

    legacy_hal::wifi_scan_cmd_params* legacy_scan_params);

// Convert the blob of packed IE elements to vector of

// |WifiInformationElement| structures.

bool convertLegacyIeBlobToHidl(const uint8_t* ie_blob,

                               uint32_t ie_blob_len,

                               std::vector<WifiInformationElement>* hidl_ies);

// |has_ie_data| indicates whether or not the wifi_scan_result includes 802.11

// Information Elements (IEs)

bool convertLegacyScanResultToHidl(

    const legacy_hal::wifi_scan_result& legacy_scan_result,

    bool has_ie_data,

    StaScanResult* hidl_scan_result);

// |cached_results| is assumed to not include IEs.

bool convertLegacyVectorOfCachedScanResultsToHidl(

    const std::vector<legacy_hal::wifi_cached_scan_results>&

        legacy_cached_scan_results,

    std::vector<StaScanData>* hidl_scan_datas);

bool convertLegacyLinkLayerStatsToHidl(

    const legacy_hal::LinkLayerStats& legacy_stats,

    StaLinkLayerStats* hidl_stats);

}  // namespace hidl_struct_util

}  // namespace implementation

}  // namespace V1_0

}  // namespace wifi

}  // namespace hardware

}  // namespace android



#endif  // HIDL_STRUCT_UTIL_H_