dsr-errorbuff.h

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/*
 * Copyright (c) 2011 Yufei Cheng
 *
 * 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: Yufei Cheng   <yfcheng@ittc.ku.edu>
 *
 * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
 * ResiliNets Research Group  https://resilinets.org/
 * Information and Telecommunication Technology Center (ITTC)
 * and Department of Electrical Engineering and Computer Science
 * The University of Kansas Lawrence, KS USA.
 *
 * Work supported in part by NSF FIND (Future Internet Design) Program
 * under grant CNS-0626918 (Postmodern Internet Architecture),
 * NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimentation on GENI),
 * US Department of Defense (DoD), and ITTC at The University of Kansas.
 */
 
#ifndef DSR_ERRORBUFF_H
#define DSR_ERRORBUFF_H
 
#include "ns3/ipv4-routing-protocol.h"
#include "ns3/simulator.h"
 
#include <vector>
 
namespace ns3
{
namespace dsr
{
class DsrErrorBuffEntry
{
  public:
    DsrErrorBuffEntry(Ptr<const Packet> pa = nullptr,
                      Ipv4Address d = Ipv4Address(),
                      Ipv4Address s = Ipv4Address(),
                      Ipv4Address n = Ipv4Address(),
                      Time exp = Simulator::Now(),
                      uint8_t p = 0)
        : m_packet(pa),
          m_dst(d),
          m_source(s),
          m_nextHop(n),
          m_expire(exp + Simulator::Now()),
          m_protocol(p)
    {
    }
 
    bool operator==(const DsrErrorBuffEntry& o) const
    {
        return ((m_packet == o.m_packet) && (m_source == o.m_source) &&
                (m_nextHop == o.m_nextHop) && (m_dst == o.m_dst) && (m_expire == o.m_expire));
    }
 
    // Fields
    Ptr<const Packet> GetPacket() const
    {
        return m_packet;
    }
 
    void SetPacket(Ptr<const Packet> p)
    {
        m_packet = p;
    }
 
    Ipv4Address GetDestination() const
    {
        return m_dst;
    }
 
    void SetDestination(Ipv4Address d)
    {
        m_dst = d;
    }
 
    Ipv4Address GetSource() const
    {
        return m_source;
    }
 
    void SetSource(Ipv4Address s)
    {
        m_source = s;
    }
 
    Ipv4Address GetNextHop() const
    {
        return m_nextHop;
    }
 
    void SetNextHop(Ipv4Address n)
    {
        m_nextHop = n;
    }
 
    void SetExpireTime(Time exp)
    {
        m_expire = exp + Simulator::Now();
    }
 
    Time GetExpireTime() const
    {
        return m_expire - Simulator::Now();
    }
 
    void SetProtocol(uint8_t p)
    {
        m_protocol = p;
    }
 
    uint8_t GetProtocol() const
    {
        return m_protocol;
    }
 
  private:
    Ptr<const Packet> m_packet; 
    Ipv4Address m_dst; 
    Ipv4Address m_source; 
    Ipv4Address m_nextHop; 
    Time m_expire; 
    uint8_t m_protocol;
};
 
/************************************************************************************************************************/
class DsrErrorBuffer
{
  public:
    DsrErrorBuffer()
    {
    }
 
    bool Enqueue(DsrErrorBuffEntry& entry);
    bool Dequeue(Ipv4Address dst, DsrErrorBuffEntry& entry);
    void DropPacketForErrLink(Ipv4Address source, Ipv4Address nextHop);
    bool Find(Ipv4Address dst);
    uint32_t GetSize();
 
    // Fields
    uint32_t GetMaxQueueLen() const
    {
        return m_maxLen;
    }
 
    void SetMaxQueueLen(uint32_t len)
    {
        m_maxLen = len;
    }
 
    Time GetErrorBufferTimeout() const
    {
        return m_errorBufferTimeout;
    }
 
    void SetErrorBufferTimeout(Time t)
    {
        m_errorBufferTimeout = t;
    }
 
    std::vector<DsrErrorBuffEntry>& GetBuffer()
    {
        return m_errorBuffer;
    }
 
  private:
    std::vector<DsrErrorBuffEntry> m_errorBuffer;
    void Purge();
    void Drop(DsrErrorBuffEntry en, std::string reason);
    void DropLink(DsrErrorBuffEntry en, std::string reason);
    uint32_t m_maxLen;
    Time m_errorBufferTimeout;
};
 
/*******************************************************************************************************************************/
} // namespace dsr
} // namespace ns3
 
#endif /* DSR_ERRORBUFF_H */