packet-sink.h

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/*
 * Copyright 2007 University of Washington
 *
 * 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:  Tom Henderson (tomhend@u.washington.edu)
 */
 
#ifndef PACKET_SINK_H
#define PACKET_SINK_H
 
#include "seq-ts-size-header.h"
 
#include "ns3/address.h"
#include "ns3/application.h"
#include "ns3/event-id.h"
#include "ns3/inet-socket-address.h"
#include "ns3/inet6-socket-address.h"
#include "ns3/ptr.h"
#include "ns3/traced-callback.h"
 
#include <unordered_map>
 
namespace ns3
{
 
class Address;
class Socket;
class Packet;
 
class PacketSink : public Application
{
  public:
    static TypeId GetTypeId();
    PacketSink();
 
    ~PacketSink() override;
 
    uint64_t GetTotalRx() const;
 
    Ptr<Socket> GetListeningSocket() const;
 
    std::list<Ptr<Socket>> GetAcceptedSockets() const;
 
    typedef void (*SeqTsSizeCallback)(Ptr<const Packet> p,
                                      const Address& from,
                                      const Address& to,
                                      const SeqTsSizeHeader& header);
 
  protected:
    void DoDispose() override;
 
  private:
    // inherited from Application base class.
    void StartApplication() override; // Called at time specified by Start
    void StopApplication() override;  // Called at time specified by Stop
 
    void HandleRead(Ptr<Socket> socket);
    void HandleAccept(Ptr<Socket> socket, const Address& from);
    void HandlePeerClose(Ptr<Socket> socket);
    void HandlePeerError(Ptr<Socket> socket);
 
    void PacketReceived(const Ptr<Packet>& p, const Address& from, const Address& localAddress);
 
    struct AddressHash
    {
        size_t operator()(const Address& x) const
        {
            if (InetSocketAddress::IsMatchingType(x))
            {
                InetSocketAddress a = InetSocketAddress::ConvertFrom(x);
                return Ipv4AddressHash()(a.GetIpv4());
            }
            else if (Inet6SocketAddress::IsMatchingType(x))
            {
                Inet6SocketAddress a = Inet6SocketAddress::ConvertFrom(x);
                return Ipv6AddressHash()(a.GetIpv6());
            }
 
            NS_ABORT_MSG("PacketSink: unexpected address type, neither IPv4 nor IPv6");
            return 0; // silence the warnings.
        }
    };
 
    std::unordered_map<Address, Ptr<Packet>, AddressHash> m_buffer; 
 
    // In the case of TCP, each socket accept returns a new socket, so the
    // listening socket is stored separately from the accepted sockets
    Ptr<Socket> m_socket;                
    std::list<Ptr<Socket>> m_socketList; 
 
    Address m_local;      
    uint16_t m_localPort; 
    uint64_t m_totalRx;   
    TypeId m_tid;         
 
    bool m_enableSeqTsSizeHeader{false}; 
 
    TracedCallback<Ptr<const Packet>, const Address&> m_rxTrace;
    TracedCallback<Ptr<const Packet>, const Address&, const Address&> m_rxTraceWithAddresses;
    TracedCallback<Ptr<const Packet>, const Address&, const Address&, const SeqTsSizeHeader&>
        m_rxTraceWithSeqTsSize;
};
 
} // namespace ns3
 
#endif /* PACKET_SINK_H */