epc-sgw-pgw-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_SGW_PGW_APPLICATION_H
#define EPC_SGW_PGW_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/eps-bearer.h>
#include <ns3/epc-tft.h>
#include <ns3/epc-tft-classifier.h>
#include <ns3/lte-common.h>
#include <ns3/application.h>
#include <ns3/epc-s1ap-sap.h>
#include <ns3/epc-s11-sap.h>
#include <map>

namespace ns3 {

class EpcSgwPgwApplication : public Application
{
  friend class MemberEpcS11SapSgw<EpcSgwPgwApplication>;

public:

  static TypeId GetTypeId (void);
  virtual void DoDispose ();

  EpcSgwPgwApplication (const Ptr<VirtualNetDevice> tunDevice, const Ptr<Socket> s1uSocket);

  virtual ~EpcSgwPgwApplication (void);
  
  bool RecvFromTunDevice (Ptr<Packet> packet, const Address& source, const Address& dest, uint16_t protocolNumber);


  void RecvFromS1uSocket (Ptr<Socket> socket);

  void SendToTunDevice (Ptr<Packet> packet, uint32_t teid);


  void SendToS1uSocket (Ptr<Packet> packet, Ipv4Address enbS1uAddress, uint32_t teid);
  

  void SetS11SapMme (EpcS11SapMme * s);

  EpcS11SapSgw* GetS11SapSgw ();


  void AddEnb (uint16_t cellId, Ipv4Address enbAddr, Ipv4Address sgwAddr);

  void AddUe (uint64_t imsi);

  void SetUeAddress (uint64_t imsi, Ipv4Address ueAddr);

private:

  // S11 SAP SGW methods
  void DoCreateSessionRequest (EpcS11SapSgw::CreateSessionRequestMessage msg);
  void DoModifyBearerRequest (EpcS11SapSgw::ModifyBearerRequestMessage msg);  

  void DoDeleteBearerCommand (EpcS11SapSgw::DeleteBearerCommandMessage req);
  void DoDeleteBearerResponse (EpcS11SapSgw::DeleteBearerResponseMessage req);


  class UeInfo : public SimpleRefCount<UeInfo>
  {
public:
    UeInfo ();  

    void AddBearer (Ptr<EpcTft> tft, uint8_t epsBearerId, uint32_t teid);

    void RemoveBearer (uint8_t bearerId);

    uint32_t Classify (Ptr<Packet> p);

    Ipv4Address GetEnbAddr ();

    void SetEnbAddr (Ipv4Address addr);

    Ipv4Address GetUeAddr ();

    void SetUeAddr (Ipv4Address addr);


  private:
    EpcTftClassifier m_tftClassifier; 
    Ipv4Address m_enbAddr; 
    Ipv4Address m_ueAddr; 
    std::map<uint8_t, uint32_t> m_teidByBearerIdMap; 
  };


  Ptr<Socket> m_s1uSocket;
  
  Ptr<VirtualNetDevice> m_tunDevice;

  std::map<Ipv4Address, Ptr<UeInfo> > m_ueInfoByAddrMap;

  std::map<uint64_t, Ptr<UeInfo> > m_ueInfoByImsiMap;

  uint16_t m_gtpuUdpPort;

  uint32_t m_teidCount;

  EpcS11SapMme* m_s11SapMme;

  EpcS11SapSgw* m_s11SapSgw;

  struct EnbInfo
  {
    Ipv4Address enbAddr; 
    Ipv4Address sgwAddr; 
  };

  std::map<uint16_t, EnbInfo> m_enbInfoByCellId; 
};

} //namespace ns3

#endif /* EPC_SGW_PGW_APPLICATION_H */