/*
 * Copyright 2020 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@1.5;

import @1.0::StaLinkLayerIfaceStats;
import @1.0::StaLinkLayerIfacePacketStats;
import @1.0::TimeStampInMs;
import @1.4::WifiBand;
import @1.0::NanCipherSuiteType;
import @1.0::NanCapabilities;
import @1.2::NanConfigRequestSupplemental;
import @1.3::StaLinkLayerRadioStats;
import @1.0::WifiChannelInMhz;
import @1.0::WifiChannelWidthInMhz;
import @1.4::WifiRateInfo;

/**
 * Wifi bands defined in 80211 spec.
 */
enum WifiBand : @1.4::WifiBand {
    /**
     * 60 GHz.
     */
    BAND_60GHZ = 16,
    /**
     * 2.4 GHz + 5 GHz no DFS + 6 GHz + 60 GHz.
     */
    BAND_24GHZ_5GHZ_6GHZ_60GHZ = 27,
    /**
     * 2.4 GHz + 5 GHz with DFS + 6 GHz + 60 GHz.
     */
    BAND_24GHZ_5GHZ_WITH_DFS_6GHZ_60GHZ = 31,
};

/**
 * Interface operating modes.
 */
enum WifiIfaceMode : uint32_t {
    /**
     * Interface operation mode is client.
     */
    IFACE_MODE_STA = 1 << 0,
    /**
     * Interface operation mode is Hotspot.
     */
    IFACE_MODE_SOFTAP = 1 << 1,
    /**
     * Interface operation mode is Ad-Hoc network.
     */
    IFACE_MODE_IBSS = 1 << 2,
    /**
     * Interface operation mode is Wifi Direct Client.
     */
    IFACE_MODE_P2P_CLIENT = 1 << 3,
    /**
     * Interface operation mode is Wifi Direct Group Owner.
     */
    IFACE_MODE_P2P_GO = 1 << 4,
    /**
     * Interface operation mode is Aware.
     */
    IFACE_MODE_NAN = 1 << 5,
    /**
     * Interface operation mode is Mesh network.
     */
    IFACE_MODE_MESH = 1 << 6,
    /**
     * Interface operation mode is Tunneled Direct Link Setup.
     */
    IFACE_MODE_TDLS = 1 << 7,
};

/**
 * Wifi usable channel information.
 */
struct WifiUsableChannel {
    /**
     * Wifi channel freqeuncy in MHz.
     */
    WifiChannelInMhz channel;

    /**
     * Wifi channel bandwidth in MHz.
     */
    WifiChannelWidthInMhz channelBandwidth;

    /**
     * Iface modes feasible on this channel.
     */
    bitfield<WifiIfaceMode> ifaceModeMask;
};

/**
 * NAN configuration request parameters added in the 1.2 HAL. These are supplemental to previous
 * versions.
 */
struct NanConfigRequestSupplemental {
    /**
     * Baseline information as defined in HAL 1.2.
     */
    @1.2::NanConfigRequestSupplemental V1_2;

    /**
     * Controls whether NAN instant communication mode is enabled.
     */
    bool enableInstantCommunicationMode;
};

/**
 * NDP Capabilities response.
 */
struct NanCapabilities {
    /**
     * Baseline information as defined in HAL 1.0.
     */
    @1.0::NanCapabilities V1_0;

    /**
     * Flag to indicate id instant communication mode is supported.
     */
    bool instantCommunicationModeSupportFlag;
};

/**
 * Contention time statistics for different traffic categories.
 */
struct StaLinkLayerIfaceContentionTimeStats {
    /**
     * Data packet min contention time (usec).  It includes both the internal contention time
     * among different access categories within the chipset and the contention time for the medium.
     */
    uint32_t contentionTimeMinInUsec;

    /**
     * Data packet max contention time (usec).  It includes both the internal contention time
     * among different access categories within the chipset and the contention time for the medium.
     */
    uint32_t contentionTimeMaxInUsec;
    /**
     * Data packet average contention time (usec).  It includes both the internal contention time
     * among different access categories within the chipset and the contention time for the medium.
     */
    uint32_t contentionTimeAvgInUsec;

    /**
     * Number of data packets used for contention statistics.
     */
    uint32_t contentionNumSamples;
};

/**
 * Per rate statistics.  The rate is characterized by the combination of preamble, number of spatial
 * streams, transmission bandwidth, and modulation and coding scheme (MCS).
 */
struct StaRateStat{
    /**
     * Wifi rate information: preamble, number of spatial streams, bandwidth, MCS, etc.
     */
    WifiRateInfo rateInfo;
    /**
     * Number of successfully transmitted data packets (ACK received)
     */
    uint32_t txMpdu;
    /**
     * Number of received data packets
     */
    uint32_t rxMpdu;
    /**
     * Number of data packet losses (no ACK)
     */
    uint32_t mpduLost;
    /**
     * Number of data packet retries
     */
    uint32_t retries;
};

/**
 * Per peer statistics.  The types of peer include the Access Point (AP), the Tunneled Direct Link
 * Setup (TDLS), the Group Owner (GO), the Neighbor Awareness Networking (NAN), etc.
 */
struct StaPeerInfo {
    /**
     * Station count: The total number of stations currently associated with the peer.
     */
    uint16_t staCount;
    /**
     * Channel utilization: The percentage of time (normalized to 255, i.e., x% corresponds to
     * (int) x * 255 / 100) that the medium is sensed as busy measured by either physical or
     * virtual carrier sense (CS) mechanism.
     */
    uint16_t chanUtil;
    /**
     * Per rate statistics
     */
    vec<StaRateStat> rateStats;
};

/**
 * Iface statistics for the current connection.
 */
struct StaLinkLayerIfaceStats {
    /**
     * Baseline information as defined in HAL 1.0.
     */
    @1.0::StaLinkLayerIfaceStats V1_0;

    /**
     * Duty cycle for the iface.
     * if this iface is being served using time slicing on a radio with one or more ifaces
     * (i.e MCC), then the duty cycle assigned to this iface in %.
     * If not using time slicing (i.e SCC or DBS), set to 100.
     */
    uint8_t timeSliceDutyCycleInPercent;

    /**
     * WME Best Effort (BE) Access Category (AC) contention time statistics.
     */
    StaLinkLayerIfaceContentionTimeStats wmeBeContentionTimeStats;

    /**
     * WME Background (BK) Access Category (AC) contention time statistics.
     */
    StaLinkLayerIfaceContentionTimeStats wmeBkContentionTimeStats;

    /**
     * WME Video (VI) Access Category (AC) contention time statistics.
     */
    StaLinkLayerIfaceContentionTimeStats wmeViContentionTimeStats;

    /**
     * WME Voice (VO) Access Category (AC) contention time statistics.
     */
    StaLinkLayerIfaceContentionTimeStats wmeVoContentionTimeStats;

    /**
     * Per peer statistics.
     */
    vec<StaPeerInfo> peers;
};

struct StaLinkLayerRadioStats {
    /**
     * Baseline information as defined in HAL 1.3.
     */
    @1.3::StaLinkLayerRadioStats V1_3;

    /**
     * Radio ID: An implementation specific value identifying the radio interface for which the
     * stats are produced. Framework must not interpret this value. It must use this value for
     * persistently identifying the statistics between calls,
     * e.g. if the HAL provides them in different order.
     */
    int32_t radioId;
};

/**
 * Link layer stats retrieved via |getLinkLayerStats|.
 */
struct StaLinkLayerStats {
    StaLinkLayerIfaceStats iface;

    vec<StaLinkLayerRadioStats> radios;

    /**
     * TimeStamp for each stats sample.
     * This is the absolute milliseconds from boot when these stats were
     * sampled.
     */
    TimeStampInMs timeStampInMs;
};