epc-pgw-application.h

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/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2018 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>
 *         (based on epc-sgw-pgw-application.h)
 */

#ifndef EPC_PGW_APPLICATION_H
#define EPC_PGW_APPLICATION_H

#include "ns3/virtual-net-device.h"
#include "ns3/socket.h"
#include "ns3/application.h"
#include "ns3/epc-tft-classifier.h"
#include "ns3/epc-gtpc-header.h"

namespace ns3 {

class EpcPgwApplication : public Application
{
public:

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

  EpcPgwApplication (const Ptr<VirtualNetDevice> tunDevice, Ipv4Address s5Addr,
                     const Ptr<Socket> s5uSocket, const Ptr<Socket> s5cSocket);

  virtual ~EpcPgwApplication (void);

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

  void RecvFromS5uSocket (Ptr<Socket> socket);

  void RecvFromS5cSocket (Ptr<Socket> socket);

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

  void SendToS5uSocket (Ptr<Packet> packet, Ipv4Address sgwS5uAddress, uint32_t teid);


  void AddSgw (Ipv4Address sgwS5Addr);

  void AddUe (uint64_t imsi);

  void SetUeAddress (uint64_t imsi, Ipv4Address ueAddr);

  void SetUeAddress6 (uint64_t imsi, Ipv6Address ueAddr);

  typedef void (* RxTracedCallback)
    (Ptr<Packet> packet);

private:

  void DoRecvCreateSessionRequest (Ptr<Packet> packet);

  void DoRecvModifyBearerRequest (Ptr<Packet> packet);

  void DoRecvDeleteBearerCommand (Ptr<Packet> packet);

  void DoRecvDeleteBearerResponse (Ptr<Packet> packet);


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

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

    void RemoveBearer (uint8_t bearerId);

    uint32_t Classify (Ptr<Packet> p, uint16_t protocolNumber);

    Ipv4Address GetSgwAddr ();

    void SetSgwAddr (Ipv4Address addr);

    Ipv4Address GetUeAddr ();

    void SetUeAddr (Ipv4Address addr);

    Ipv6Address GetUeAddr6 ();

    void SetUeAddr6 (Ipv6Address addr);

  private:
    Ipv4Address m_ueAddr; 
    Ipv6Address m_ueAddr6; 
    Ipv4Address m_sgwAddr; 
    EpcTftClassifier m_tftClassifier; 
    std::map<uint8_t, uint32_t> m_teidByBearerIdMap; 
  };

  Ipv4Address m_pgwS5Addr;

  Ptr<Socket> m_s5uSocket;

  Ptr<Socket> m_s5cSocket;

  Ptr<VirtualNetDevice> m_tunDevice;

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

  std::map<Ipv6Address, Ptr<UeInfo> > m_ueInfoByAddrMap6;

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

  uint16_t m_gtpuUdpPort;

  uint16_t m_gtpcUdpPort;

  Ipv4Address m_sgwS5Addr;

  TracedCallback<Ptr<Packet> > m_rxTunPktTrace;

  TracedCallback<Ptr<Packet> > m_rxS5PktTrace;
};

} // namespace ns3

#endif // EPC_PGW_APPLICATION_H