lte-rlc-am-header.h

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/*
 * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * 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: Manuel Requena <manuel.requena@cttc.es>
 */
 
#ifndef LTE_RLC_AM_HEADER_H
#define LTE_RLC_AM_HEADER_H
 
#include "lte-rlc-sequence-number.h"
 
#include "ns3/header.h"
 
#include <list>
 
namespace ns3
{
 
class LteRlcAmHeader : public Header
{
  public:
    LteRlcAmHeader();
    ~LteRlcAmHeader() override;
 
    void SetDataPdu();
    void SetControlPdu(uint8_t controlPduType);
    bool IsDataPdu() const;
    bool IsControlPdu() const;
 
    enum DataControlPdu_t
    {
        CONTROL_PDU = 0,
        DATA_PDU = 1
    };
 
    static constexpr uint8_t STATUS_PDU{0};
 
    //
    // DATA PDU
    //
 
    void SetSequenceNumber(SequenceNumber10 sequenceNumber);
    SequenceNumber10 GetSequenceNumber() const;
 
    void SetFramingInfo(uint8_t framingInfo);
    uint8_t GetFramingInfo() const;
 
    enum FramingInfoByte_t
    {
        FIRST_BYTE = 0x00,
        NO_FIRST_BYTE = 0x02,
        LAST_BYTE = 0x00,
        NO_LAST_BYTE = 0x01
    };
 
    void PushExtensionBit(uint8_t extensionBit);
    void PushLengthIndicator(uint16_t lengthIndicator);
 
    uint8_t PopExtensionBit();
    uint16_t PopLengthIndicator();
 
    enum ExtensionBit_t
    {
        DATA_FIELD_FOLLOWS = 0,
        E_LI_FIELDS_FOLLOWS = 1
    };
 
    void SetResegmentationFlag(uint8_t resegFlag);
    uint8_t GetResegmentationFlag() const;
 
    enum ResegmentationFlag_t
    {
        PDU = 0,
        SEGMENT = 1
    };
 
    void SetPollingBit(uint8_t pollingBit);
    uint8_t GetPollingBit() const;
 
    enum PollingBit_t
    {
        STATUS_REPORT_NOT_REQUESTED = 0,
        STATUS_REPORT_IS_REQUESTED = 1
    };
 
    void SetLastSegmentFlag(uint8_t lsf);
    uint8_t GetLastSegmentFlag() const;
 
    enum LastSegmentFlag_t
    {
        NO_LAST_PDU_SEGMENT = 0,
        LAST_PDU_SEGMENT = 1
    };
 
    void SetSegmentOffset(uint16_t segmentOffset);
    uint16_t GetSegmentOffset() const;
    uint16_t GetLastOffset() const;
 
    //
    // CONTROL PDU
    //
 
    void SetAckSn(SequenceNumber10 ackSn);
    SequenceNumber10 GetAckSn() const;
 
    static TypeId GetTypeId();
    TypeId GetInstanceTypeId() const override;
    void Print(std::ostream& os) const override;
    uint32_t GetSerializedSize() const override;
    void Serialize(Buffer::Iterator start) const override;
    uint32_t Deserialize(Buffer::Iterator start) override;
 
    bool OneMoreNackWouldFitIn(uint16_t bytes);
 
    void PushNack(int nack);
 
    bool IsNackPresent(SequenceNumber10 nack);
 
    int PopNack();
 
  private:
    uint16_t m_headerLength;  
    uint8_t m_dataControlBit; 
 
    // Data PDU fields
    uint8_t m_resegmentationFlag;      
    uint8_t m_pollingBit;              
    uint8_t m_framingInfo;             
    SequenceNumber10 m_sequenceNumber; 
    uint8_t m_lastSegmentFlag;         
    uint16_t m_segmentOffset;          
    uint16_t m_lastOffset;             
 
    std::list<uint8_t> m_extensionBits;     
    std::list<uint16_t> m_lengthIndicators; 
 
    // Control PDU fields
    uint8_t m_controlPduType; 
 
    // Status PDU fields
    SequenceNumber10 m_ackSn;    
    std::list<int> m_nackSnList; 
 
    std::list<uint8_t> m_extensionBits1; 
    std::list<uint8_t> m_extensionBits2; 
};
 
}; // namespace ns3
 
#endif // LTE_RLC_AM_HEADER_H