epc-enb-application.h

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/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * 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 <ns3/address.h>
#include <ns3/socket.h>
#include <ns3/virtual-net-device.h>
#include <ns3/traced-callback.h>
#include <ns3/callback.h>
#include <ns3/ptr.h>
#include <ns3/object.h>
#include <ns3/lte-common.h>
#include <ns3/application.h>
#include <ns3/eps-bearer.h>
#include <ns3/epc-enb-s1-sap.h>
#include <ns3/epc-s1ap-sap.h>
#include <map>

namespace ns3 {
class EpcEnbS1SapUser;
class EpcEnbS1SapProvider;


class EpcEnbApplication : public Application
{

  friend class MemberEpcEnbS1SapProvider<EpcEnbApplication>;
  friend class MemberEpcS1apSapEnb<EpcEnbApplication>;


  // inherited from Object
public:
  static TypeId GetTypeId (void);
protected:
  void DoDispose (void);

public:
  
  

  EpcEnbApplication (Ptr<Socket> lteSocket, Ptr<Socket> s1uSocket, Ipv4Address enbS1uAddress, Ipv4Address sgwS1uAddress, uint16_t cellId);

  virtual ~EpcEnbApplication (void);


  void SetS1SapUser (EpcEnbS1SapUser * s);

  EpcEnbS1SapProvider* GetS1SapProvider ();

  void SetS1apSapMme (EpcS1apSapMme * s);

  EpcS1apSapEnb* GetS1apSapEnb ();
 
  void RecvFromLteSocket (Ptr<Socket> socket);


  void RecvFromS1uSocket (Ptr<Socket> socket);


  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 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_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;

};

} //namespace ns3

#endif /* EPC_ENB_APPLICATION_H */