Attachment #1856 for bug #1955

View | Details | Raw Unified | Return to bug 1955
Collapse All | Expand All




    }
}

uint128_t Ipv4L3Protocol::GetIpIdentificationKey(Ipv4Address source,
                                                 Ipv4Address destination,
                                                 uint8_t protocol)
{
  uint128_t src = (uint128_t)source.Get() & 0xffffffff;
  uint128_t dst = (uint128_t)destination.Get() & 0xffffffff;
  uint128_t key = protocol | (dst << 8) | (src << 40);
  return key;
}
  
// XXX when should we set ip_id?   check whether we are incrementing
// m_identification on packets that may later be dropped in this stack
// and whether that deviates from Linux

  if (mayFragment == true)
    {
      ipHeader.SetMayFragment ();
      uint128_t ipIdKey = GetIpIdentificationKey(source, destination, protocol);
      ipHeader.SetIdentification (m_identification[ipIdKey]);
      m_identification[ipIdKey]++;
    }
  else
    {

      // identification requirement:
      // >> Originating sources MAY set the IPv4 ID field of atomic datagrams
      //    to any value.
      uint128_t ipIdKey = GetIpIdentificationKey(source, destination, protocol);
      ipHeader.SetIdentification (m_identification[ipIdKey]);
      m_identification[ipIdKey]++;
    }
  if (Node::ChecksumEnabled ())
    {




   * \param iif Input Interface
   */
  void HandleFragmentsTimeout ( std::pair<uint64_t, uint32_t> key, Ipv4Header & ipHeader, uint32_t iif);
  
  /**
   * \brief Compute IP identification key from source, destination and protocol, used to access
   * the IP identification map.
   **/
  uint128_t GetIpIdentificationKey(Ipv4Address source,
                                   Ipv4Address destination,
                                   uint8_t protocol);

  typedef std::vector<Ptr<Ipv4Interface> > Ipv4InterfaceList;
  typedef std::list<Ptr<Ipv4RawSocketImpl> > SocketList;

  L4List_t m_protocols;
  Ipv4InterfaceList m_interfaces;
  uint8_t m_defaultTtl;
  std::map<uint128_t, uint16_t> m_identification; //!< Identification (for each protocol)
  Ptr<Node> m_node;

  TracedCallback<const Ipv4Header &, Ptr<const Packet>, uint32_t> m_sendOutgoingTrace;

Return to bug 1955