eht-operation.h

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/*
 * Copyright (c) 2022
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Sharan Naribole <sharan.naribole@gmail.com>
 */
 
#ifndef EHT_OPERATION_H
#define EHT_OPERATION_H
 
#include <ns3/wifi-information-element.h>
 
#include <optional>
#include <vector>
 
namespace ns3
{
 
constexpr uint8_t WIFI_EHT_MAX_MCS_INDEX = 13;
constexpr uint16_t WIFI_EHT_OP_PARAMS_SIZE_B = 1;
constexpr uint16_t WIFI_EHT_OP_INFO_BASIC_SIZE_B = 3;
constexpr uint16_t WIFI_EHT_DISABLED_SUBCH_BM_SIZE_B = 2;
constexpr uint16_t WIFI_EHT_BASIC_MCS_NSS_SET_SIZE_B = 4;
constexpr uint8_t WIFI_DEFAULT_EHT_MAX_NSS = 1;
constexpr uint8_t WIFI_EHT_MAX_NSS_CONFIGURABLE = 8;
constexpr uint8_t WIFI_DEFAULT_EHT_OP_INFO_PRESENT = 0;
constexpr uint8_t WIFI_DEFAULT_EHT_OP_DIS_SUBCH_BM_PRESENT = 0;
constexpr uint8_t WIFI_DEFAULT_EHT_OP_PE_DUR = 0;
constexpr uint8_t WIFI_DEFAULT_GRP_BU_IND_LIMIT = 0;
constexpr uint8_t WIFI_DEFAULT_GRP_BU_EXP = 0;
 
class EhtOperation : public WifiInformationElement
{
  public:
    struct EhtOpParams
    {
        uint8_t opInfoPresent{WIFI_DEFAULT_EHT_OP_INFO_PRESENT};
        uint8_t disabledSubchBmPresent{WIFI_DEFAULT_EHT_OP_DIS_SUBCH_BM_PRESENT};
        uint8_t defaultPeDur{WIFI_DEFAULT_EHT_OP_PE_DUR};
        uint8_t grpBuIndLimit{WIFI_DEFAULT_GRP_BU_IND_LIMIT};
        uint8_t grpBuExp{WIFI_DEFAULT_GRP_BU_EXP};
 
        void Serialize(Buffer::Iterator& start) const;
        uint16_t Deserialize(Buffer::Iterator start);
    };
 
    struct EhtOpControl
    {
        uint8_t channelWidth : 3; 
    };
 
    struct EhtOpInfo
    {
        EhtOpControl control;                    
        uint8_t ccfs0;                           
        uint8_t ccfs1;                           
        std::optional<uint16_t> disabledSubchBm; 
 
        void Serialize(Buffer::Iterator& start) const;
        uint16_t Deserialize(Buffer::Iterator start, bool disabledSubchBmPresent);
    };
 
    struct EhtBasicMcsNssSet
    {
        std::vector<uint8_t> maxRxNss{}; 
        std::vector<uint8_t> maxTxNss{}; 
 
        void Serialize(Buffer::Iterator& start) const;
        uint16_t Deserialize(Buffer::Iterator start);
    };
 
    EhtOperation();
    WifiInformationElementId ElementId() const override;
    WifiInformationElementId ElementIdExt() const override;
    void Print(std::ostream& os) const override;
 
    void SetMaxRxNss(uint8_t maxNss, uint8_t mcsStart, uint8_t mcsEnd);
    void SetMaxTxNss(uint8_t maxNss, uint8_t mcsStart, uint8_t mcsEnd);
 
    EhtOpParams m_params;              
    EhtBasicMcsNssSet m_mcsNssSet;     
    std::optional<EhtOpInfo> m_opInfo; 
 
  private:
    uint16_t GetInformationFieldSize() const override;
    void SerializeInformationField(Buffer::Iterator start) const override;
    uint16_t DeserializeInformationField(Buffer::Iterator start, uint16_t length) override;
};
 
} // namespace ns3
 
#endif /* EHT_OPERATION_H */