src/node/ipv4.cc
author Tom Henderson <tomh@tomh.org>
Sun, 18 Mar 2007 14:06:51 -0700
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// -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*-
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//
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// Copyright (c) 2006 Georgia Tech Research Corporation
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// All rights reserved.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2 as
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// published by the Free Software Foundation;
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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//
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// Author: George F. Riley<riley@ece.gatech.edu>
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//
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#include "ns3/packet.h"
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#include "ns3/debug.h"
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#include "ns3/composite-trace-resolver.h"
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#include "ns3/array-trace-resolver.h"
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#include "ns3/callback.h"
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#include "ipv4.h"
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#include "ipv4-l4-protocol.h"
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#include "ipv4-address.h"
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#include "ipv4-header.h"
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#include "ipv4-interface.h"
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#include "ipv4-route.h"
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// the two following headers are needed for Ipv4::ForwardUp
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#include "node.h"
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#include "ipv4-l4-demux.h"
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NS_DEBUG_COMPONENT_DEFINE ("Ipv4");
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namespace ns3 {
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const uint16_t Ipv4::PROT_NUMBER = 0x0800;
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Ipv4::Ipv4(Node *node)
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  : L3Protocol (PROT_NUMBER, 4),
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    m_nInterfaces (0),
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    m_defaultTtl (64),
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    m_identification (0),
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    m_defaultRoute (0),
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    m_node (node)
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{}
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Ipv4::~Ipv4 ()
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{
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  // XXX I am not sure we are really allowed to do this here.
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  for (Ipv4InterfaceList::iterator i = m_interfaces.begin (); i != m_interfaces.end (); i++)
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    {
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      delete (*i);
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    }
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  for (HostRoutesI i = m_hostRoutes.begin (); 
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       i != m_hostRoutes.end (); 
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       i = m_hostRoutes.erase (i)) 
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    {
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      delete (*i);
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    }
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  for (NetworkRoutesI j = m_networkRoutes.begin (); 
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       j != m_networkRoutes.end (); 
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       j = m_networkRoutes.erase (j)) 
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    {
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      delete (*j);
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    }
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  delete m_defaultRoute;
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}
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TraceResolver *
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Ipv4::CreateTraceResolver (TraceContext const &context)
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{
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  CompositeTraceResolver *resolver = new CompositeTraceResolver (context);
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  resolver->Add ("tx", m_txTrace, Ipv4::TX);
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  resolver->Add ("rx", m_rxTrace, Ipv4::RX);
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  resolver->Add ("drop", m_dropTrace, Ipv4::DROP);
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  resolver->Add ("interfaces", 
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                 MakeCallback (&Ipv4::InterfacesCreateTraceResolver, this), 
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                 Ipv4::INTERFACES);
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  return resolver;
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}
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TraceResolver *
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Ipv4::InterfacesCreateTraceResolver (TraceContext const &context)
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{
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  ArrayTraceResolver<Ipv4Interface> *resolver = 
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    new ArrayTraceResolver<Ipv4Interface> 
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    (context,
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     MakeCallback (&Ipv4::GetNInterfaces, this),
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     MakeCallback (&Ipv4::GetInterface, this));
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  return resolver;
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}
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void 
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Ipv4::SetDefaultTtl (uint8_t ttl)
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{
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  m_defaultTtl = ttl;
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}
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void 
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Ipv4::AddHostRouteTo (Ipv4Address dest, 
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                      Ipv4Address nextHop, 
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                      uint32_t interface)
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{
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  Ipv4Route *route = new Ipv4Route ();
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  *route = Ipv4Route::CreateHostRouteTo (dest, nextHop, interface);
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  m_hostRoutes.push_back (route);
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}
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void 
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Ipv4::AddHostRouteTo (Ipv4Address dest, 
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				uint32_t interface)
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{
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  Ipv4Route *route = new Ipv4Route ();
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  *route = Ipv4Route::CreateHostRouteTo (dest, interface);
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  m_hostRoutes.push_back (route);
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}
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void 
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Ipv4::AddNetworkRouteTo (Ipv4Address network, 
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				   Ipv4Mask networkMask, 
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				   Ipv4Address nextHop, 
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				   uint32_t interface)
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{
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  Ipv4Route *route = new Ipv4Route ();
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  *route = Ipv4Route::CreateNetworkRouteTo (network,
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                                            networkMask,
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                                            nextHop,
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                                            interface);
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  m_networkRoutes.push_back (route);
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}
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void 
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Ipv4::AddNetworkRouteTo (Ipv4Address network, 
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				   Ipv4Mask networkMask, 
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				   uint32_t interface)
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{
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  Ipv4Route *route = new Ipv4Route ();
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  *route = Ipv4Route::CreateNetworkRouteTo (network,
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                                            networkMask,
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                                            interface);
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  m_networkRoutes.push_back (route);
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}
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void 
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Ipv4::SetDefaultRoute (Ipv4Address nextHop, 
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				 uint32_t interface)
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{
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  Ipv4Route *route = new Ipv4Route ();
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  *route = Ipv4Route::CreateDefaultRoute (nextHop, interface);
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  delete m_defaultRoute;
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  m_defaultRoute = route;
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}
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Ipv4Route *
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Ipv4::Lookup (Ipv4Address dest)
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{
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  for (HostRoutesCI i = m_hostRoutes.begin (); 
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       i != m_hostRoutes.end (); 
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       i++) 
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    {
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      NS_ASSERT ((*i)->IsHost ());
236
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      if ((*i)->GetDest ().IsEqual (dest)) 
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        {
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          return (*i);
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        }
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    }
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  for (NetworkRoutesI j = m_networkRoutes.begin (); 
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       j != m_networkRoutes.end (); 
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       j++) 
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    {
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      NS_ASSERT ((*j)->IsNetwork ());
236
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      Ipv4Mask mask = (*j)->GetDestNetworkMask ();
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      Ipv4Address entry = (*j)->GetDestNetwork ();
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      if (mask.IsMatch (dest, entry)) 
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        {
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          return (*j);
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        }
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    }
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  if (m_defaultRoute != 0) 
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    {
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      NS_ASSERT (m_defaultRoute->IsDefault ());
236
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      return m_defaultRoute;
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    }
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  return 0;
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}
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uint32_t 
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Ipv4::GetNRoutes (void)
236
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{
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  uint32_t n = 0;
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  if (m_defaultRoute != 0)
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    {
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      n++;
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    }
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  n += m_hostRoutes.size ();
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  n += m_networkRoutes.size ();
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  return n;
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}
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Ipv4Route *
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Ipv4::GetRoute (uint32_t index)
236
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{
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  if (index == 0 && m_defaultRoute != 0)
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    {
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      return m_defaultRoute;
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    }
254
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  if (index > 0 && m_defaultRoute != 0)
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    {
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      index--;
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    }
236
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  if (index < m_hostRoutes.size ())
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    {
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      uint32_t tmp = 0;
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      for (HostRoutesCI i = m_hostRoutes.begin (); 
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           i != m_hostRoutes.end (); 
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           i++) 
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        {
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          if (tmp  == index)
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            {
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              return *i;
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            }
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          tmp++;
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        }
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    }
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  index -= m_hostRoutes.size ();
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  uint32_t tmp = 0;
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  for (NetworkRoutesI j = m_networkRoutes.begin (); 
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       j != m_networkRoutes.end (); 
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       j++) 
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    {
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      if (tmp == index)
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        {
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          return *j;
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        }
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      tmp++;
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    }
286
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  NS_ASSERT (false);
236
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  // quiet compiler.
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  return 0;
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}
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void 
240
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Ipv4::RemoveRoute (uint32_t index)
236
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{
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  if (index == 0 && m_defaultRoute != 0)
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    {
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      delete m_defaultRoute;
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      m_defaultRoute = 0;
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    }
254
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  if (index > 0 && m_defaultRoute != 0)
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    {
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      index--;
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    }
236
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  if (index < m_hostRoutes.size ())
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    {
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      uint32_t tmp = 0;
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      for (HostRoutesI i = m_hostRoutes.begin (); 
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           i != m_hostRoutes.end (); 
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           i++) 
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        {
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          if (tmp  == index)
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            {
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              delete *i;
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              m_hostRoutes.erase (i);
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              return;
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            }
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          tmp++;
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        }
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    }
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  index -= m_hostRoutes.size ();
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  uint32_t tmp = 0;
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  for (NetworkRoutesI j = m_networkRoutes.begin (); 
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       j != m_networkRoutes.end (); 
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       j++) 
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    {
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      if (tmp == index)
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        {
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          delete *j;
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          m_networkRoutes.erase (j);
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          return;
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        }
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      tmp++;
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    }
286
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  NS_ASSERT (false);
236
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}
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uint32_t 
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Ipv4::AddInterface (Ipv4Interface *interface)
236
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{
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  uint32_t index = m_nInterfaces;
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  m_interfaces.push_back (interface);
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  m_nInterfaces++;
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  return index;
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}
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Ipv4Interface *
240
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Ipv4::GetInterface (uint32_t index)
236
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{
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  uint32_t tmp = 0;
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  for (Ipv4InterfaceList::const_iterator i = m_interfaces.begin (); i != m_interfaces.end (); i++)
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    {
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      if (index == tmp) 
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	{
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	  return *i;
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	}
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      tmp++;
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    }
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  return 0;
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}
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uint32_t 
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   311
Ipv4::GetNInterfaces (void)
236
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{
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  return m_nInterfaces;
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   314
}
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242
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diff changeset
   316
Ipv4Interface *
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diff changeset
   317
Ipv4::FindInterfaceForDevice (NetDevice const*device)
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   318
{
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diff changeset
   319
  for (Ipv4InterfaceList::const_iterator i = m_interfaces.begin (); i != m_interfaces.end (); i++)
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diff changeset
   320
    {
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diff changeset
   321
      if ((*i)->GetDevice () == device)
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   322
        {
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diff changeset
   323
          return *i;
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diff changeset
   324
        }
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   325
    }
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   326
  return 0;
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   327
}  
236
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240
7da682f99bf9 add non-debugged udp stack
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diff changeset
   329
Ipv4* 
241
9004ab4cfe17 add Ipv4 and Udp node capabilities, rework Copy methods to include an extra Node * argument
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diff changeset
   330
Ipv4::Copy(Node *node) const
236
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   331
{
241
9004ab4cfe17 add Ipv4 and Udp node capabilities, rework Copy methods to include an extra Node * argument
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parents: 240
diff changeset
   332
  Ipv4 *ipv4 = new Ipv4 (node);
9004ab4cfe17 add Ipv4 and Udp node capabilities, rework Copy methods to include an extra Node * argument
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parents: 240
diff changeset
   333
  ipv4->SetDefaultTtl (m_defaultTtl);
9004ab4cfe17 add Ipv4 and Udp node capabilities, rework Copy methods to include an extra Node * argument
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diff changeset
   334
  return ipv4;
236
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diff changeset
   335
}
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   336
void 
240
7da682f99bf9 add non-debugged udp stack
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diff changeset
   337
Ipv4::Receive(Packet& packet, NetDevice &device)
236
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diff changeset
   338
{
345
47b41507a45a move channel.cc channel.h to node directory; merge ns-3-tracing from mathieu
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diff changeset
   339
  m_rxTrace (packet);
236
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   340
  Ipv4Header ipHeader;
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   341
  packet.Peek (ipHeader);
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diff changeset
   342
  packet.Remove (ipHeader);
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parents:
diff changeset
   343
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diff changeset
   344
  if (!ipHeader.IsChecksumOk ()) 
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diff changeset
   345
    {
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diff changeset
   346
      return;
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parents:
diff changeset
   347
    }
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parents:
diff changeset
   348
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parents:
diff changeset
   349
  if (Forwarding (packet, ipHeader, device)) 
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parents:
diff changeset
   350
    {
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parents:
diff changeset
   351
      return;
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parents:
diff changeset
   352
    }
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parents:
diff changeset
   353
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diff changeset
   354
  ForwardUp (packet, ipHeader);
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parents:
diff changeset
   355
}
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parents:
diff changeset
   356
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diff changeset
   357
void 
240
7da682f99bf9 add non-debugged udp stack
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parents: 236
diff changeset
   358
Ipv4::Send (Packet const &packet, 
236
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parents:
diff changeset
   359
                      Ipv4Address source, 
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parents:
diff changeset
   360
                      Ipv4Address destination,
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parents:
diff changeset
   361
                      uint8_t protocol)
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parents:
diff changeset
   362
{
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parents:
diff changeset
   363
  Ipv4Header ipHeader;
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   364
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   365
  ipHeader.SetSource (source);
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   366
  ipHeader.SetDestination (destination);
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parents:
diff changeset
   367
  ipHeader.SetProtocol (protocol);
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parents:
diff changeset
   368
  ipHeader.SetPayloadSize (packet.GetSize ());
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   369
  ipHeader.SetTtl (m_defaultTtl);
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parents:
diff changeset
   370
  ipHeader.SetMayFragment ();
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parents:
diff changeset
   371
  ipHeader.SetIdentification (m_identification);
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   372
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parents:
diff changeset
   373
  m_identification ++;
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parents:
diff changeset
   374
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parents:
diff changeset
   375
  // XXX Note here that in most ipv4 stacks in the world,
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   376
  // the route calculation for an outgoing packet is not
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   377
  // done in the ip layer. It is done within the application
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   378
  // socket when the first packet is sent to avoid this
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   379
  // costly lookup on a per-packet basis.
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   380
  // That would require us to get the route from the packet,
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   381
  // most likely with a packet tag. The higher layers do not
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   382
  // do this yet for us.
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   383
  Ipv4Route *route = Lookup (ipHeader.GetDestination ());
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   384
  if (route == 0) 
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   385
    {
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   386
      NS_DEBUG ("not for me -- forwarding but no route to host. drop.");
345
47b41507a45a move channel.cc channel.h to node directory; merge ns-3-tracing from mathieu
Tom Henderson <tomh@tomh.org>
parents: 293
diff changeset
   387
      m_dropTrace (packet);
236
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   388
      return;
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   389
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   390
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   391
  SendRealOut (packet, ipHeader, *route);
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   392
}
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   393
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   394
void
240
7da682f99bf9 add non-debugged udp stack
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 236
diff changeset
   395
Ipv4::SendRealOut (Packet const &p, Ipv4Header const &ip, Ipv4Route const &route)
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   396
{
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   397
  Packet packet = p;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   398
  packet.Add (ip);
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   399
  Ipv4Interface *outInterface = GetInterface (route.GetInterface ());
286
57e6a2006962 convert use of <cassert> to "ns3/assert.h"
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 254
diff changeset
   400
  NS_ASSERT (packet.GetSize () <= outInterface->GetMtu ());
345
47b41507a45a move channel.cc channel.h to node directory; merge ns-3-tracing from mathieu
Tom Henderson <tomh@tomh.org>
parents: 293
diff changeset
   401
  m_txTrace (packet);
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   402
  if (route.IsGateway ()) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   403
    {
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   404
      outInterface->Send (packet, route.GetGateway ());
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   405
    } 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   406
  else 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   407
    {
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   408
      outInterface->Send (packet, ip.GetDestination ());
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   409
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   410
}
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   411
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   412
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   413
bool
240
7da682f99bf9 add non-debugged udp stack
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 236
diff changeset
   414
Ipv4::Forwarding (Packet const &packet, Ipv4Header &ipHeader, NetDevice &device)
236
5673656dc2e7 a basic untested ipv4 implementation
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parents:
diff changeset
   415
{
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   416
  for (Ipv4InterfaceList::const_iterator i = m_interfaces.begin ();
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   417
       i != m_interfaces.end (); i++) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   418
    {
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   419
      if ((*i)->GetAddress ().IsEqual (ipHeader.GetDestination ())) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   420
        {
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   421
          NS_DEBUG ("for me 1");
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   422
          return false;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   423
        }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   424
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   425
  
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   426
  for (Ipv4InterfaceList::const_iterator i = m_interfaces.begin ();
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   427
       i != m_interfaces.end (); i++) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   428
    {
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   429
      Ipv4Interface *interface = *i;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   430
      if (interface->GetDevice () == &device)
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   431
	{
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   432
	  if (ipHeader.GetDestination ().IsEqual (interface->GetBroadcast ())) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   433
	    {
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   434
	      NS_DEBUG ("for me 2");
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   435
	      return false;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   436
	    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   437
	  break;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   438
	}
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   439
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   440
      
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   441
  if (ipHeader.GetDestination ().IsEqual (Ipv4Address::GetBroadcast ())) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   442
    {
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   443
      NS_DEBUG ("for me 3");
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   444
      return false;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   445
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   446
  if (ipHeader.GetDestination ().IsEqual (Ipv4Address::GetAny ())) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   447
    {
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   448
      NS_DEBUG ("for me 4");
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   449
      return false;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   450
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   451
  if (ipHeader.GetTtl () == 1) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   452
    {
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   453
      // Should send ttl expired here
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   454
      // XXX
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   455
      NS_DEBUG ("not for me -- ttl expired. drop.");
345
47b41507a45a move channel.cc channel.h to node directory; merge ns-3-tracing from mathieu
Tom Henderson <tomh@tomh.org>
parents: 293
diff changeset
   456
      m_dropTrace (packet);
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   457
      return true;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   458
    }
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   459
  ipHeader.SetTtl (ipHeader.GetTtl () - 1);
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   460
  Ipv4Route *route = Lookup (ipHeader.GetDestination ());
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   461
  if (route == 0) 
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   462
    {
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   463
      NS_DEBUG ("not for me -- forwarding but no route to host. drop.");
345
47b41507a45a move channel.cc channel.h to node directory; merge ns-3-tracing from mathieu
Tom Henderson <tomh@tomh.org>
parents: 293
diff changeset
   464
      m_dropTrace (packet);
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   465
      return true;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   466
    }
287
692ddac3794c convert old TRACE code to use new NS_DEBUG macro
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 286
diff changeset
   467
  NS_DEBUG ("not for me -- forwarding.");
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   468
  SendRealOut (packet, ipHeader, *route);
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   469
  return true;
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   470
}
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   471
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   472
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   473
void
240
7da682f99bf9 add non-debugged udp stack
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 236
diff changeset
   474
Ipv4::ForwardUp (Packet p, Ipv4Header const&ip)
236
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   475
{
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   476
  Ipv4L4Protocol *protocol = m_node->GetIpv4L4Demux ()->Lookup (ip.GetProtocol ());
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   477
  protocol->Receive (p, ip.GetSource (), ip.GetDestination ());
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   478
}
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   479
5673656dc2e7 a basic untested ipv4 implementation
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   480
}//namespace ns3