nr-epc-gnb-application.h

// Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
//
// SPDX-License-Identifier: GPL-2.0-only
//
// Authors:
//   Jaume Nin <jnin@cttc.cat>
//   Nicola Baldo <nbaldo@cttc.cat>
 
#ifndef NR_EPC_GNB_APPLICATION_H
#define NR_EPC_GNB_APPLICATION_H
 
#include "nr-epc-gnb-s1-sap.h"
#include "nr-epc-s1ap-sap.h"
 
#include "ns3/address.h"
#include "ns3/application.h"
#include "ns3/callback.h"
#include "ns3/object.h"
#include "ns3/ptr.h"
#include "ns3/socket.h"
#include "ns3/traced-callback.h"
#include "ns3/virtual-net-device.h"
 
#include <map>
 
namespace ns3
{
class NrEpcGnbS1SapUser;
class NrEpcGnbS1SapProvider;
 
class NrEpcGnbApplication : public Application
{
    friend class NrMemberEpcGnbS1SapProvider<NrEpcGnbApplication>;
    friend class NrMemberEpcS1apSapGnb<NrEpcGnbApplication>;
 
  public:
    static TypeId GetTypeId();
 
  protected:
    void DoDispose() override;
 
  public:
    NrEpcGnbApplication(Ptr<Socket> nrSocket, Ptr<Socket> nrSocket6, uint16_t cellId);
 
    void AddS1Interface(Ptr<Socket> s1uSocket,
                        Ipv4Address gnbS1uAddress,
                        Ipv4Address sgwS1uAddress);
 
    ~NrEpcGnbApplication() override;
 
    void SetS1SapUser(NrEpcGnbS1SapUser* s);
 
    NrEpcGnbS1SapProvider* GetS1SapProvider();
 
    void SetS1apSapMme(NrEpcS1apSapMme* s);
 
    NrEpcS1apSapGnb* GetS1apSapGnb();
 
    void RecvFromNrSocket(Ptr<Socket> socket);
 
    void RecvFromS1uSocket(Ptr<Socket> socket);
 
    typedef void (*RxTracedCallback)(Ptr<Packet> packet);
 
    struct EpsFlowId_t
    {
        uint16_t m_rnti; 
        uint8_t m_bid;   
 
      public:
        EpsFlowId_t();
        EpsFlowId_t(const uint16_t a, const uint8_t b);
 
        friend bool operator==(const EpsFlowId_t& a, const EpsFlowId_t& b);
        friend bool operator<(const EpsFlowId_t& a, const EpsFlowId_t& b);
    };
 
  private:
    // gNB S1 SAP provider methods
    void DoInitialUeMessage(uint64_t imsi, uint16_t rnti);
    void DoPathSwitchRequest(NrEpcGnbS1SapProvider::PathSwitchRequestParameters params);
    void DoUeContextRelease(uint16_t rnti);
 
    // S1-AP SAP gNB methods
    void DoInitialContextSetupRequest(
        uint64_t mmeUeS1Id,
        uint16_t gnbUeS1Id,
        std::list<NrEpcS1apSapGnb::ErabToBeSetupItem> erabToBeSetupList);
    void DoPathSwitchRequestAcknowledge(
        uint64_t gnbUeS1Id,
        uint64_t mmeUeS1Id,
        uint16_t cgi,
        std::list<NrEpcS1apSapGnb::ErabSwitchedInUplinkItem> erabToBeSwitchedInUplinkList);
 
    void DoReleaseIndication(uint64_t imsi, uint16_t rnti, uint8_t bearerId);
 
    void SendToNrSocket(Ptr<Packet> packet, uint16_t rnti, uint8_t bid);
 
    void SendToS1uSocket(Ptr<Packet> packet, uint32_t teid);
 
    void SetupS1Bearer(uint32_t teid, uint16_t rnti, uint8_t bid);
 
    Ptr<Socket> m_nrSocket;
 
    Ptr<Socket> m_nrSocket6;
 
    Ptr<Socket> m_s1uSocket;
 
    Ipv4Address m_gnbS1uAddress;
 
    Ipv4Address m_sgwS1uAddress;
 
    std::map<uint16_t, std::map<uint8_t, uint32_t>> m_rbidTeidMap;
 
    std::map<uint32_t, EpsFlowId_t> m_teidRbidMap;
 
    uint16_t m_gtpuUdpPort;
 
    NrEpcGnbS1SapProvider* m_s1SapProvider;
 
    NrEpcGnbS1SapUser* m_s1SapUser;
 
    NrEpcS1apSapMme* m_s1apSapMme;
 
    NrEpcS1apSapGnb* m_s1apSapGnb;
 
    std::map<uint64_t, uint16_t> m_imsiRntiMap;
 
    uint16_t m_cellId; 
 
    TracedCallback<Ptr<Packet>> m_rxNrSocketPktTrace;
 
    TracedCallback<Ptr<Packet>> m_rxS1uSocketPktTrace;
};
 
} // namespace ns3
 
#endif /* NR_EPC_GNB_APPLICATION_H */