/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

 /* 

  * Copyright (c) 2009 University of Texas at Dallas

  * 

  * 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: Qasim Javed <qasim@utdallas.edu>

  */

 #include "ns3/log.h"

 #include "ns3/ipv4-header.h"

 #include "ns3/callback.h"

 #include "ns3/conntrack-tag.h"

 #include "ipv4-conntrack-l3-protocol.h"

 NS_LOG_COMPONENT_DEFINE ("Ipv4ConntrackL3Protocol");

 namespace ns3 {

 Ipv4ConntrackL3Protocol::Ipv4ConntrackL3Protocol ()

 {

 }

 uint32_t 

 Ipv4ConntrackL3Protocol::Ipv4Confirm (Hooks_t hookNumber, Ptr<Packet> packet, Ptr<NetDevice> in,

                       Ptr<NetDevice> out, ContinueCallback& ccb)

 {

   NS_LOG_DEBUG (":: Executing hook function Ipv4Confirm ::");

   /*ConntrackTag ctinfo;

   bool tagFound = packet->PeekPacketTag (ctinfo);

   if (!tagFound || ctinfo.GetConntrack () == IP_CT_RELATED + IP_CT_IS_REPLY)

   {

     NS_LOG_DEBUG ("Conntrack tag not found");

     return 0;

   }*/

   // Call conntrack helper here

   NS_ASSERT (!ccb.IsNull ());

   // NetfilterConntrackConfirm

   NS_LOG_DEBUG ("Invoking the ContinueCallback");

   ccb (packet);

   return 0;

 }

 uint32_t 

 Ipv4ConntrackL3Protocol::Ipv4ConntrackPreRoutingHook (Hooks_t hookNumber, Ptr<Packet> p, Ptr<NetDevice> in, Ptr<NetDevice> out, ContinueCallback& ccb)

 {

   return 0;

 }

 uint32_t 

 Ipv4ConntrackL3Protocol::Ipv4ConntrackInHook (Hooks_t hookNumber, Ptr<Packet> p, Ptr<NetDevice> in, Ptr<NetDevice> out, ContinueCallback& ccb)

 {

   return 0;

 }

 uint32_t 

 Ipv4ConntrackL3Protocol::Ipv4ConntrackOutHook (Hooks_t hookNumber, Ptr<Packet> p, Ptr<NetDevice> in, Ptr<NetDevice> out, ContinueCallback& ccb)

 {

   return 0;

 }

 uint32_t 

 Ipv4ConntrackL3Protocol::Ipv4ConntrackPostRoutingHook (Hooks_t hookNumber, Ptr<Packet> p, Ptr<NetDevice> in, Ptr<NetDevice> out, ContinueCallback& ccb)

 {

   return 0;

 }

 uint16_t 

 Ipv4ConntrackL3Protocol::RegisterPreRoutingHook ()

 {

   return 0;

 }

 uint16_t 

 Ipv4ConntrackL3Protocol::RegisterInHook ()

 {

   return 0;

 }

 uint16_t 

 Ipv4ConntrackL3Protocol::RegisterOutHook ()

 {

   return 0;

 }

 uint16_t 

 Ipv4ConntrackL3Protocol::RegisterPostRoutingHook ()

 {

   return 0;

 }

 bool 

 Ipv4ConntrackL3Protocol::PacketToTuple (Ptr<Packet> packet, NetfilterConntrackTuple& tuple)

 {

   Ipv4Header ipHeader;

   packet->PeekHeader (ipHeader);

   tuple.SetSource (ipHeader.GetSource ());

   tuple.SetDestination (ipHeader.GetDestination ());

   NS_LOG_DEBUG ("Ipv4 Packet To Tuple: " << "( " << tuple.GetSource () << "," << tuple.GetSourcePort () << "," << tuple.GetDestination () << "," << tuple.GetDestinationPort () << ")" );

   return true;

 }

 bool 

 Ipv4ConntrackL3Protocol::InvertTuple (NetfilterConntrackTuple& inverse, NetfilterConntrackTuple& orig)

 {

   inverse.SetSource (orig.GetDestination () );

   inverse.SetDestination (orig.GetSource () );

   return true;

 }

 }