epc-enb-application.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: Jaume Nin <jnin@cttc.cat>
 *         Nicola Baldo <nbaldo@cttc.cat>
 */
 
#ifndef EPC_ENB_APPLICATION_H
#define EPC_ENB_APPLICATION_H
 
#include "epc-enb-s1-sap.h"
#include "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 EpcEnbS1SapUser;
class EpcEnbS1SapProvider;
 
class EpcEnbApplication : public Application
{
    friend class MemberEpcEnbS1SapProvider<EpcEnbApplication>;
    friend class MemberEpcS1apSapEnb<EpcEnbApplication>;
 
  public:
    static TypeId GetTypeId();
 
  protected:
    void DoDispose() override;
 
  public:
    EpcEnbApplication(Ptr<Socket> lteSocket, Ptr<Socket> lteSocket6, uint16_t cellId);
 
    void AddS1Interface(Ptr<Socket> s1uSocket,
                        Ipv4Address enbS1uAddress,
                        Ipv4Address sgwS1uAddress);
 
    ~EpcEnbApplication() override;
 
    void SetS1SapUser(EpcEnbS1SapUser* s);
 
    EpcEnbS1SapProvider* GetS1SapProvider();
 
    void SetS1apSapMme(EpcS1apSapMme* s);
 
    EpcS1apSapEnb* GetS1apSapEnb();
 
    void RecvFromLteSocket(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:
    // ENB S1 SAP provider methods
    void DoInitialUeMessage(uint64_t imsi, uint16_t rnti);
    void DoPathSwitchRequest(EpcEnbS1SapProvider::PathSwitchRequestParameters params);
    void DoUeContextRelease(uint16_t rnti);
 
    // S1-AP SAP ENB methods
    void DoInitialContextSetupRequest(
        uint64_t mmeUeS1Id,
        uint16_t enbUeS1Id,
        std::list<EpcS1apSapEnb::ErabToBeSetupItem> erabToBeSetupList);
    void DoPathSwitchRequestAcknowledge(
        uint64_t enbUeS1Id,
        uint64_t mmeUeS1Id,
        uint16_t cgi,
        std::list<EpcS1apSapEnb::ErabSwitchedInUplinkItem> erabToBeSwitchedInUplinkList);
 
    void DoReleaseIndication(uint64_t imsi, uint16_t rnti, uint8_t bearerId);
 
    void SendToLteSocket(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_lteSocket;
 
    Ptr<Socket> m_lteSocket6;
 
    Ptr<Socket> m_s1uSocket;
 
    Ipv4Address m_enbS1uAddress;
 
    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;
 
    EpcEnbS1SapProvider* m_s1SapProvider;
 
    EpcEnbS1SapUser* m_s1SapUser;
 
    EpcS1apSapMme* m_s1apSapMme;
 
    EpcS1apSapEnb* m_s1apSapEnb;
 
    std::map<uint64_t, uint16_t> m_imsiRntiMap;
 
    uint16_t m_cellId; 
 
    TracedCallback<Ptr<Packet>> m_rxLteSocketPktTrace;
 
    TracedCallback<Ptr<Packet>> m_rxS1uSocketPktTrace;
};
 
} // namespace ns3
 
#endif /* EPC_ENB_APPLICATION_H */