epc-sgw-application.h

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/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2017-2018 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>
 */

#ifndef EPC_SGW_APPLICATION_H
#define EPC_SGW_APPLICATION_H

#include "ns3/application.h"
#include "ns3/address.h"
#include "ns3/socket.h"
#include "ns3/epc-gtpc-header.h"

namespace ns3 {

class EpcSgwApplication : public Application
{
public:

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

  EpcSgwApplication (const Ptr<Socket> s1uSocket, Ipv4Address s5Addr,
                     const Ptr<Socket> s5uSocket, const Ptr<Socket> s5cSocket);

  virtual ~EpcSgwApplication (void);


  void AddMme (Ipv4Address mmeS11Addr, Ptr<Socket> s11Socket);

  void AddPgw (Ipv4Address pgwAddr);

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


private:
  void RecvFromS11Socket (Ptr<Socket> socket);

  void RecvFromS5uSocket (Ptr<Socket> socket);

  void RecvFromS5cSocket (Ptr<Socket> socket);

  void RecvFromS1uSocket (Ptr<Socket> socket);

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

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


  // Process messages received from the MME

  void DoRecvCreateSessionRequest (Ptr<Packet> packet);

  void DoRecvModifyBearerRequest (Ptr<Packet> packet);

  void DoRecvDeleteBearerCommand (Ptr<Packet> packet);

  void DoRecvDeleteBearerResponse (Ptr<Packet> packet);


  // Process messages received from the PGW

  void DoRecvCreateSessionResponse (Ptr<Packet> packet);

  void DoRecvModifyBearerResponse (Ptr<Packet> packet);

  void DoRecvDeleteBearerRequest (Ptr<Packet> packet);


  Ipv4Address m_s5Addr;

  Ipv4Address m_mmeS11Addr;

  Ptr<Socket> m_s11Socket;

  Ipv4Address m_pgwAddr;

  Ptr<Socket> m_s5uSocket;

  Ptr<Socket> m_s5cSocket;

  Ptr<Socket> m_s1uSocket;

  uint16_t m_gtpuUdpPort;

  uint16_t m_gtpcUdpPort;

  uint32_t m_teidCount;


  struct EnbInfo
  {
    Ipv4Address enbAddr; 
    Ipv4Address sgwAddr; 
  };

  std::map<uint16_t, EnbInfo> m_enbInfoByCellId;

  std::map<uint32_t, Ipv4Address> m_enbByTeidMap;

  std::map<uint32_t, GtpcHeader::Fteid_t> m_mmeS11FteidBySgwS5cTeid;
};

} // namespace ns3

#endif // EPC_SGW_APPLICATION_H