tid-to-link-mapping-element.h

Go to the documentation of this file.

/*
 * 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 TID_TO_LINK_MAPPING_H
#define TID_TO_LINK_MAPPING_H
 
#include "ns3/nstime.h"
#include "ns3/wifi-information-element.h"
#include "ns3/wifi-utils.h"
 
#include <map>
#include <optional>
#include <set>
 
namespace ns3
{
 
constexpr auto DEFAULT_WIFI_TID_LINK_MAPPING{true};
constexpr auto DEFAULT_WIFI_TID_LINK_MAP_DIR{WifiDirection::BOTH_DIRECTIONS};
constexpr uint16_t WIFI_TID_TO_LINK_MAPPING_CONTROL_BASIC_SIZE_B =
    1; // IEEE 802.11be D2.0 9.4.2.314
constexpr uint16_t WIFI_LINK_MAPPING_PRESENCE_IND_SIZE_B = 1;
 
class TidToLinkMapping : public WifiInformationElement
{
  public:
    struct Control
    {
        friend class TidToLinkMapping;
 
        WifiDirection direction{DEFAULT_WIFI_TID_LINK_MAP_DIR}; 
        bool defaultMapping{DEFAULT_WIFI_TID_LINK_MAPPING};     
 
        uint16_t GetSubfieldSize() const;
 
        void Serialize(Buffer::Iterator& start) const;
        uint16_t Deserialize(Buffer::Iterator start);
 
      private:
        bool mappingSwitchTimePresent{false}; 
        bool expectedDurationPresent{false};  
        uint8_t linkMappingSize{1}; 
        std::optional<uint8_t> presenceBitmap; 
    };
 
    WifiInformationElementId ElementId() const override;
    WifiInformationElementId ElementIdExt() const override;
 
    void SetMappingSwitchTime(Time mappingSwitchTime);
 
    std::optional<Time> GetMappingSwitchTime() const;
 
    void SetExpectedDuration(Time expectedDuration);
 
    std::optional<Time> GetExpectedDuration() const;
 
    void SetLinkMappingOfTid(uint8_t tid, std::set<uint8_t> linkIds);
    std::set<uint8_t> GetLinkMappingOfTid(uint8_t tid) const;
 
    TidToLinkMapping::Control m_control;       
    std::map<uint8_t, uint16_t> m_linkMapping; 
 
  private:
    std::optional<uint16_t> m_mappingSwitchTime; 
    std::optional<uint32_t> m_expectedDuration;  
 
    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 /* TID_TO_LINK_MAPPING_H */