/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2007-2009 Strasbourg University
*
* 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: Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
*/
#include "ns3/log.h"
#include "ns3/node.h"
#include "ns3/uinteger.h"
#include "ns3/vector.h"
#include "ns3/boolean.h"
#include "ns3/callback.h"
#include "ns3/trace-source-accessor.h"
#include "ns3/object-vector.h"
#include "ns3/ipv6-routing-protocol.h"
#include "ns3/ipv6-route.h"
#include "ns3/mac16-address.h"
#include "ns3/mac64-address.h"
#include "loopback-net-device.h"
#include "ipv6-l3-protocol.h"
#include "ipv6-interface.h"
#include "ipv6-raw-socket-impl.h"
#include "ipv6-autoconfigured-prefix.h"
#include "ipv6-extension-demux.h"
#include "ipv6-extension.h"
#include "ipv6-extension-header.h"
#include "ipv6-option-demux.h"
#include "ipv6-option.h"
#include "icmpv6-l4-protocol.h"
#include "ndisc-cache.h"
/// Minimum IPv6 MTU, as defined by \RFC{2460}
#define IPV6_MIN_MTU 1280
namespace ns3 {
NS_OBJECT_ENSURE_REGISTERED (Ipv6L3Protocol);
NS_LOG_COMPONENT_DEFINE ("Ipv6L3Protocol");
const uint16_t Ipv6L3Protocol::PROT_NUMBER = 0x86DD;
TypeId Ipv6L3Protocol::GetTypeId ()
{
static TypeId tid = TypeId ("ns3::Ipv6L3Protocol")
.SetParent<Ipv6> ()
.AddConstructor<Ipv6L3Protocol> ()
.AddAttribute ("DefaultTtl", "The TTL value set by default on all outgoing packets generated on this node.",
UintegerValue (64),
MakeUintegerAccessor (&Ipv6L3Protocol::m_defaultTtl),
MakeUintegerChecker<uint8_t> ())
.AddAttribute ("DefaultTclass", "The TCLASS value set by default on all outgoing packets generated on this node.",
UintegerValue (0),
MakeUintegerAccessor (&Ipv6L3Protocol::m_defaultTclass),
MakeUintegerChecker<uint8_t> ())
.AddAttribute ("InterfaceList", "The set of IPv6 interfaces associated to this IPv6 stack.",
ObjectVectorValue (),
MakeObjectVectorAccessor (&Ipv6L3Protocol::m_interfaces),
MakeObjectVectorChecker<Ipv6Interface> ())
.AddAttribute ("SendIcmpv6Redirect", "Send the ICMPv6 Redirect when appropriate.",
BooleanValue (true),
MakeBooleanAccessor (&Ipv6L3Protocol::SetSendIcmpv6Redirect,
&Ipv6L3Protocol::GetSendIcmpv6Redirect),
MakeBooleanChecker ())
.AddTraceSource ("Tx", "Send IPv6 packet to outgoing interface.",
MakeTraceSourceAccessor (&Ipv6L3Protocol::m_txTrace))
.AddTraceSource ("Rx", "Receive IPv6 packet from incoming interface.",
MakeTraceSourceAccessor (&Ipv6L3Protocol::m_rxTrace))
.AddTraceSource ("Drop", "Drop IPv6 packet",
MakeTraceSourceAccessor (&Ipv6L3Protocol::m_dropTrace))
.AddTraceSource ("SendOutgoing", "A newly-generated packet by this node is about to be queued for transmission",
MakeTraceSourceAccessor (&Ipv6L3Protocol::m_sendOutgoingTrace))
.AddTraceSource ("UnicastForward", "A unicast IPv6 packet was received by this node and is being forwarded to another node",
MakeTraceSourceAccessor (&Ipv6L3Protocol::m_unicastForwardTrace))
.AddTraceSource ("LocalDeliver", "An IPv6 packet was received by/for this node, and it is being forward up the stack",
MakeTraceSourceAccessor (&Ipv6L3Protocol::m_localDeliverTrace))
;
return tid;
}
Ipv6L3Protocol::Ipv6L3Protocol ()
: m_nInterfaces (0)
{
NS_LOG_FUNCTION_NOARGS ();
m_pmtuCache = CreateObject<Ipv6PmtuCache> ();
}
Ipv6L3Protocol::~Ipv6L3Protocol ()
{
NS_LOG_FUNCTION_NOARGS ();
}
void Ipv6L3Protocol::DoDispose ()
{
NS_LOG_FUNCTION_NOARGS ();
/* clear protocol and interface list */
for (L4List_t::iterator it = m_protocols.begin (); it != m_protocols.end (); ++it)
{
*it = 0;
}
m_protocols.clear ();
/* remove interfaces */
for (Ipv6InterfaceList::iterator it = m_interfaces.begin (); it != m_interfaces.end (); ++it)
{
*it = 0;
}
m_interfaces.clear ();
/* remove raw sockets */
for (SocketList::iterator it = m_sockets.begin (); it != m_sockets.end (); ++it)
{
*it = 0;
}
m_sockets.clear ();
/* remove list of prefix */
for (Ipv6AutoconfiguredPrefixListI it = m_prefixes.begin (); it != m_prefixes.end (); ++it)
{
(*it)->StopValidTimer ();
(*it)->StopPreferredTimer ();
(*it) = 0;
}
m_prefixes.clear ();
m_node = 0;
m_routingProtocol = 0;
m_pmtuCache = 0;
Object::DoDispose ();
}
void Ipv6L3Protocol::SetRoutingProtocol (Ptr<Ipv6RoutingProtocol> routingProtocol)
{
NS_LOG_FUNCTION (this << routingProtocol);
m_routingProtocol = routingProtocol;
m_routingProtocol->SetIpv6 (this);
}
Ptr<Ipv6RoutingProtocol> Ipv6L3Protocol::GetRoutingProtocol () const
{
NS_LOG_FUNCTION_NOARGS ();
return m_routingProtocol;
}
uint32_t Ipv6L3Protocol::AddInterface (Ptr<NetDevice> device)
{
NS_LOG_FUNCTION (this << device);
Ptr<Node> node = GetObject<Node> ();
Ptr<Ipv6Interface> interface = CreateObject<Ipv6Interface> ();
node->RegisterProtocolHandler (MakeCallback (&Ipv6L3Protocol::Receive, this), Ipv6L3Protocol::PROT_NUMBER, device);
interface->SetNode (m_node);
interface->SetDevice (device);
interface->SetForwarding (m_ipForward);
return AddIpv6Interface (interface);
}
uint32_t Ipv6L3Protocol::AddIpv6Interface (Ptr<Ipv6Interface> interface)
{
NS_LOG_FUNCTION (this << interface);
uint32_t index = m_nInterfaces;
m_interfaces.push_back (interface);
m_nInterfaces++;
return index;
}
Ptr<Ipv6Interface> Ipv6L3Protocol::GetInterface (uint32_t index) const
{
NS_LOG_FUNCTION (this << index);
uint32_t tmp = 0;
for (Ipv6InterfaceList::const_iterator it = m_interfaces.begin (); it != m_interfaces.end (); it++)
{
if (index == tmp)
{
return *it;
}
tmp++;
}
return 0;
}
uint32_t Ipv6L3Protocol::GetNInterfaces () const
{
NS_LOG_FUNCTION_NOARGS ();
return m_nInterfaces;
}
int32_t Ipv6L3Protocol::GetInterfaceForAddress (Ipv6Address address) const
{
NS_LOG_FUNCTION (this << address);
int32_t index = 0;
for (Ipv6InterfaceList::const_iterator it = m_interfaces.begin (); it != m_interfaces.end (); it++)
{
uint32_t j = 0;
uint32_t max = (*it)->GetNAddresses ();
for (j = 0; j < max; j++)
{
if ((*it)->GetAddress (j).GetAddress () == address)
{
return index;
}
}
index++;
}
return -1;
}
int32_t Ipv6L3Protocol::GetInterfaceForPrefix (Ipv6Address address, Ipv6Prefix mask) const
{
NS_LOG_FUNCTION (this << address << mask);
int32_t index = 0;
for (Ipv6InterfaceList::const_iterator it = m_interfaces.begin (); it != m_interfaces.end (); it++)
{
uint32_t j = 0;
for (j = 0; j < (*it)->GetNAddresses (); j++)
{
if ((*it)->GetAddress (j).GetAddress ().CombinePrefix (mask) == address.CombinePrefix (mask))
{
return index;
}
}
index++;
}
return -1;
}
Ptr<NetDevice> Ipv6L3Protocol::GetNetDevice (uint32_t i)
{
NS_LOG_FUNCTION (this << i);
return GetInterface (i)->GetDevice ();
}
int32_t Ipv6L3Protocol::GetInterfaceForDevice (Ptr<const NetDevice> device) const
{
NS_LOG_FUNCTION (this << device);
int32_t index = 0;
for (Ipv6InterfaceList::const_iterator it = m_interfaces.begin (); it != m_interfaces.end (); it++)
{
if ((*it)->GetDevice () == device)
{
return index;
}
index++;
}
return -1;
}
void Ipv6L3Protocol::AddAutoconfiguredAddress (uint32_t interface, Ipv6Address network, Ipv6Prefix mask, uint8_t flags, uint32_t validTime, uint32_t preferredTime, Ipv6Address defaultRouter)
{
NS_LOG_FUNCTION (this << interface << network << mask << (uint32_t)flags << validTime << preferredTime);
Ipv6InterfaceAddress address;
Address addr = GetInterface (interface)->GetDevice ()->GetAddress ();
if (flags & (1 << 6)) /* auto flag */
{
// In case of new MacAddress types, remember to change Ipv6L3Protocol::RemoveAutoconfiguredAddress as well
if (Mac64Address::IsMatchingType (addr))
{
address = Ipv6InterfaceAddress (Ipv6Address::MakeAutoconfiguredAddress (Mac64Address::ConvertFrom (addr), network));
}
else if (Mac48Address::IsMatchingType (addr))
{
address = Ipv6InterfaceAddress (Ipv6Address::MakeAutoconfiguredAddress (Mac48Address::ConvertFrom (addr), network));
}
else if (Mac16Address::IsMatchingType (addr))
{
address = Ipv6InterfaceAddress (Ipv6Address::MakeAutoconfiguredAddress (Mac16Address::ConvertFrom (addr), network));
}
else
{
NS_FATAL_ERROR ("Unknown method to make autoconfigured address for this kind of device.");
return;
}
/* see if we have already the prefix */
for (Ipv6AutoconfiguredPrefixListI it = m_prefixes.begin (); it != m_prefixes.end (); ++it)
{
if ((*it)->GetInterface () == interface && (*it)->GetPrefix () == network && (*it)->GetMask () == mask)
{
(*it)->StopPreferredTimer ();
(*it)->StopValidTimer ();
(*it)->StartPreferredTimer ();
return;
}
}
/* no prefix found, add autoconfigured address and the prefix */
NS_LOG_INFO ("Autoconfigured address is :" << address.GetAddress ());
AddAddress (interface, address);
/* add default router
* if a previous default route exists, the new ones is simply added
*/
if (!defaultRouter.IsAny())
{
GetRoutingProtocol ()->NotifyAddRoute (Ipv6Address::GetAny (), Ipv6Prefix ((uint8_t)0), defaultRouter, interface, network);
}
Ptr<Ipv6AutoconfiguredPrefix> aPrefix = CreateObject<Ipv6AutoconfiguredPrefix> (m_node, interface, network, mask, preferredTime, validTime, defaultRouter);
aPrefix->StartPreferredTimer ();
m_prefixes.push_back (aPrefix);
}
}
void Ipv6L3Protocol::RemoveAutoconfiguredAddress (uint32_t interface, Ipv6Address network, Ipv6Prefix mask, Ipv6Address defaultRouter)
{
NS_LOG_FUNCTION (this << interface << network << mask);
Ptr<Ipv6Interface> iface = GetInterface (interface);
Address addr = iface->GetDevice ()->GetAddress ();
uint32_t max = iface->GetNAddresses ();
uint32_t i = 0;
Ipv6Address toFound;
if (Mac64Address::IsMatchingType (addr))
{
toFound = Ipv6Address::MakeAutoconfiguredAddress (Mac64Address::ConvertFrom (addr), network);
}
else if (Mac48Address::IsMatchingType (addr))
{
toFound = Ipv6Address::MakeAutoconfiguredAddress (Mac48Address::ConvertFrom (addr), network);
}
else if (Mac16Address::IsMatchingType (addr))
{
toFound = Ipv6Address::MakeAutoconfiguredAddress (Mac16Address::ConvertFrom (addr), network);
}
else
{
NS_FATAL_ERROR ("Unknown method to make autoconfigured address for this kind of device.");
return;
}
for (i = 0; i < max; i++)
{
if (iface->GetAddress (i).GetAddress () == toFound)
{
RemoveAddress (interface, i);
break;
}
}
/* remove from list of autoconfigured address */
for (Ipv6AutoconfiguredPrefixListI it = m_prefixes.begin (); it != m_prefixes.end (); ++it)
{
if ((*it)->GetInterface () == interface && (*it)->GetPrefix () == network && (*it)->GetMask () == mask)
{
*it = 0;
m_prefixes.erase (it);
break;
}
}
GetRoutingProtocol ()->NotifyRemoveRoute (Ipv6Address::GetAny (), Ipv6Prefix ((uint8_t)0), defaultRouter, interface, network);
}
bool Ipv6L3Protocol::AddAddress (uint32_t i, Ipv6InterfaceAddress address)
{
NS_LOG_FUNCTION (this << i << address);
Ptr<Ipv6Interface> interface = GetInterface (i);
bool ret = interface->AddAddress (address);
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyAddAddress (i, address);
}
return ret;
}
uint32_t Ipv6L3Protocol::GetNAddresses (uint32_t i) const
{
NS_LOG_FUNCTION (this << i);
Ptr<Ipv6Interface> interface = GetInterface (i);
return interface->GetNAddresses ();
}
Ipv6InterfaceAddress Ipv6L3Protocol::GetAddress (uint32_t i, uint32_t addressIndex) const
{
NS_LOG_FUNCTION (this << i << addressIndex);
Ptr<Ipv6Interface> interface = GetInterface (i);
return interface->GetAddress (addressIndex);
}
bool Ipv6L3Protocol::RemoveAddress (uint32_t i, uint32_t addressIndex)
{
NS_LOG_FUNCTION (this << i << addressIndex);
Ptr<Ipv6Interface> interface = GetInterface (i);
Ipv6InterfaceAddress address = interface->RemoveAddress (addressIndex);
if (address != Ipv6InterfaceAddress ())
{
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyRemoveAddress (i, address);
}
return true;
}
return false;
}
bool
Ipv6L3Protocol::RemoveAddress (uint32_t i, Ipv6Address address)
{
NS_LOG_FUNCTION (this << i << address);
if (address == Ipv6Address::GetLoopback())
{
NS_LOG_WARN ("Cannot remove loopback address.");
return false;
}
Ptr<Ipv6Interface> interface = GetInterface (i);
Ipv6InterfaceAddress ifAddr = interface->RemoveAddress (address);
if (ifAddr != Ipv6InterfaceAddress ())
{
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyRemoveAddress (i, ifAddr);
}
return true;
}
return false;
}
void Ipv6L3Protocol::SetMetric (uint32_t i, uint16_t metric)
{
NS_LOG_FUNCTION (this << i << metric);
Ptr<Ipv6Interface> interface = GetInterface (i);
interface->SetMetric (metric);
}
uint16_t Ipv6L3Protocol::GetMetric (uint32_t i) const
{
NS_LOG_FUNCTION (this << i);
Ptr<Ipv6Interface> interface = GetInterface (i);
return interface->GetMetric ();
}
uint16_t Ipv6L3Protocol::GetMtu (uint32_t i) const
{
NS_LOG_FUNCTION (this << i);
// RFC 1981, if PMTU is disabled, return the minimum MTU
if (!m_mtuDiscover)
{
return IPV6_MIN_MTU;
}
Ptr<Ipv6Interface> interface = GetInterface (i);
return interface->GetDevice ()->GetMtu ();
}
void Ipv6L3Protocol::SetPmtu (Ipv6Address dst, uint32_t pmtu)
{
NS_LOG_FUNCTION (this << dst << int(pmtu));
m_pmtuCache->SetPmtu (dst, pmtu);
}
bool Ipv6L3Protocol::IsUp (uint32_t i) const
{
NS_LOG_FUNCTION (this << i);
Ptr<Ipv6Interface> interface = GetInterface (i);
return interface->IsUp ();
}
void Ipv6L3Protocol::SetUp (uint32_t i)
{
NS_LOG_FUNCTION (this << i);
Ptr<Ipv6Interface> interface = GetInterface (i);
// RFC 2460, Section 5, pg. 24:
// IPv6 requires that every link in the internet have an MTU of 1280
// octets or greater. On any link that cannot convey a 1280-octet
// packet in one piece, link-specific fragmentation and reassembly must
// be provided at a layer below IPv6.
if (interface->GetDevice ()->GetMtu () >= 1280)
{
interface->SetUp ();
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyInterfaceUp (i);
}
}
else
{
NS_LOG_LOGIC ("Interface " << int(i) << " is set to be down for IPv6. Reason: not respecting minimum IPv6 MTU (1280 octects)");
}
}
void Ipv6L3Protocol::SetDown (uint32_t i)
{
NS_LOG_FUNCTION (this << i);
Ptr<Ipv6Interface> interface = GetInterface (i);
interface->SetDown ();
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyInterfaceDown (i);
}
}
void Ipv6L3Protocol::SetupLoopback ()
{
NS_LOG_FUNCTION_NOARGS ();
Ptr<Ipv6Interface> interface = CreateObject<Ipv6Interface> ();
Ptr<LoopbackNetDevice> device = 0;
uint32_t i = 0;
/* see if we have already an loopback NetDevice */
for (i = 0; i < m_node->GetNDevices (); i++)
{
if ((device = DynamicCast<LoopbackNetDevice> (m_node->GetDevice (i))))
{
break;
}
}
if (device == 0)
{
device = CreateObject<LoopbackNetDevice> ();
m_node->AddDevice (device);
}
interface->SetDevice (device);
interface->SetNode (m_node);
Ipv6InterfaceAddress ifaceAddr = Ipv6InterfaceAddress (Ipv6Address::GetLoopback (), Ipv6Prefix (128));
interface->AddAddress (ifaceAddr);
uint32_t index = AddIpv6Interface (interface);
Ptr<Node> node = GetObject<Node> ();
node->RegisterProtocolHandler (MakeCallback (&Ipv6L3Protocol::Receive, this), Ipv6L3Protocol::PROT_NUMBER, device);
interface->SetUp ();
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyInterfaceUp (index);
}
}
bool Ipv6L3Protocol::IsForwarding (uint32_t i) const
{
NS_LOG_FUNCTION (this << i);
Ptr<Ipv6Interface> interface = GetInterface (i);
NS_LOG_LOGIC ("Forwarding state: " << interface->IsForwarding ());
return interface->IsForwarding ();
}
void Ipv6L3Protocol::SetForwarding (uint32_t i, bool val)
{
NS_LOG_FUNCTION (this << i << val);
Ptr<Ipv6Interface> interface = GetInterface (i);
interface->SetForwarding (val);
}
Ipv6Address Ipv6L3Protocol::SourceAddressSelection (uint32_t interface, Ipv6Address dest)
{
NS_LOG_FUNCTION (this << interface << dest);
Ipv6Address ret;
if (dest.IsLinkLocal () || dest.IsLinkLocalMulticast ())
{
for (uint32_t i = 0; i < GetNAddresses (interface); i++)
{
Ipv6InterfaceAddress test = GetAddress (interface, i);
if (test.GetScope () == Ipv6InterfaceAddress::LINKLOCAL)
{
return test.GetAddress ();
}
}
NS_ASSERT_MSG (false, "No link-local address found on interface " << interface);
}
for (uint32_t i = 0; i < GetNAddresses (interface); i++)
{
Ipv6InterfaceAddress test = GetAddress (interface, i);
if (test.GetScope () == Ipv6InterfaceAddress::GLOBAL)
{
if (test.IsInSameSubnet (dest))
{
return test.GetAddress ();
}
else
{
ret = test.GetAddress ();
}
}
}
// no specific match found. Use a global address (any useful is fine).
return ret;
}
void Ipv6L3Protocol::SetIpForward (bool forward)
{
NS_LOG_FUNCTION (this << forward);
m_ipForward = forward;
for (Ipv6InterfaceList::const_iterator it = m_interfaces.begin (); it != m_interfaces.end (); it++)
{
(*it)->SetForwarding (forward);
}
}
bool Ipv6L3Protocol::GetIpForward () const
{
NS_LOG_FUNCTION_NOARGS ();
return m_ipForward;
}
void Ipv6L3Protocol::SetMtuDiscover (bool mtuDiscover)
{
NS_LOG_FUNCTION (this << int(mtuDiscover));
m_mtuDiscover = mtuDiscover;
}
bool Ipv6L3Protocol::GetMtuDiscover () const
{
NS_LOG_FUNCTION (this);
return m_mtuDiscover;
}
void Ipv6L3Protocol::SetSendIcmpv6Redirect (bool sendIcmpv6Redirect)
{
NS_LOG_FUNCTION (this << sendIcmpv6Redirect);
m_sendIcmpv6Redirect = sendIcmpv6Redirect;
}
bool Ipv6L3Protocol::GetSendIcmpv6Redirect () const
{
NS_LOG_FUNCTION_NOARGS ();
return m_sendIcmpv6Redirect;
}
void Ipv6L3Protocol::NotifyNewAggregate ()
{
NS_LOG_FUNCTION_NOARGS ();
if (m_node == 0)
{
Ptr<Node> node = this->GetObject<Node> ();
// verify that it's a valid node and that
// the node has not been set before
if (node != 0)
{
this->SetNode (node);
}
}
Object::NotifyNewAggregate ();
}
void Ipv6L3Protocol::SetNode (Ptr<Node> node)
{
NS_LOG_FUNCTION (this << node);
m_node = node;
/* add LoopbackNetDevice if needed, and an Ipv6Interface on top of it */
SetupLoopback ();
}
void Ipv6L3Protocol::Insert (Ptr<IpL4Protocol> protocol)
{
NS_LOG_FUNCTION (this << protocol);
m_protocols.push_back (protocol);
}
void Ipv6L3Protocol::Remove (Ptr<IpL4Protocol> protocol)
{
NS_LOG_FUNCTION (this << protocol);
m_protocols.remove (protocol);
}
Ptr<IpL4Protocol> Ipv6L3Protocol::GetProtocol (int protocolNumber) const
{
NS_LOG_FUNCTION (this << protocolNumber);
for (L4List_t::const_iterator i = m_protocols.begin (); i != m_protocols.end (); ++i)
{
if ((*i)->GetProtocolNumber () == protocolNumber)
{
return *i;
}
}
return 0;
}
Ptr<Socket> Ipv6L3Protocol::CreateRawSocket ()
{
NS_LOG_FUNCTION_NOARGS ();
Ptr<Ipv6RawSocketImpl> sock = CreateObject<Ipv6RawSocketImpl> ();
sock->SetNode (m_node);
m_sockets.push_back (sock);
return sock;
}
void Ipv6L3Protocol::DeleteRawSocket (Ptr<Socket> socket)
{
NS_LOG_FUNCTION (this << socket);
for (SocketList::iterator it = m_sockets.begin (); it != m_sockets.end (); ++it)
{
if ((*it) == socket)
{
m_sockets.erase (it);
return;
}
}
}
Ptr<Icmpv6L4Protocol> Ipv6L3Protocol::GetIcmpv6 () const
{
NS_LOG_FUNCTION_NOARGS ();
Ptr<IpL4Protocol> protocol = GetProtocol (Icmpv6L4Protocol::GetStaticProtocolNumber ());
if (protocol)
{
return protocol->GetObject<Icmpv6L4Protocol> ();
}
else
{
return 0;
}
}
void Ipv6L3Protocol::SetDefaultTtl (uint8_t ttl)
{
NS_LOG_FUNCTION (this << ttl);
m_defaultTtl = ttl;
}
void Ipv6L3Protocol::SetDefaultTclass (uint8_t tclass)
{
NS_LOG_FUNCTION (this << tclass);
m_defaultTclass = tclass;
}
void Ipv6L3Protocol::Send (Ptr<Packet> packet, Ipv6Address source, Ipv6Address destination, uint8_t protocol, Ptr<Ipv6Route> route)
{
NS_LOG_FUNCTION (this << packet << source << destination << (uint32_t)protocol << route);
Ipv6Header hdr;
uint8_t ttl = m_defaultTtl;
SocketIpv6HopLimitTag tag;
bool found = packet->RemovePacketTag (tag);
if (found)
{
ttl = tag.GetHopLimit ();
}
SocketIpv6TclassTag tclassTag;
uint8_t tclass = m_defaultTclass;
found = packet->RemovePacketTag (tclassTag);
if (found)
{
tclass = tclassTag.GetTclass ();
}
/* Handle 3 cases:
* 1) Packet is passed in with a route entry
* 2) Packet is passed in with a route entry but route->GetGateway is not set (e.g., same network)
* 3) route is NULL (e.g., a raw socket call or ICMPv6)
*/
/* 1) */
if (route && route->GetGateway () != Ipv6Address::GetZero ())
{
NS_LOG_LOGIC ("Ipv6L3Protocol::Send case 1: passed in with a route");
hdr = BuildHeader (source, destination, protocol, packet->GetSize (), ttl, tclass);
int32_t interface = GetInterfaceForDevice (route->GetOutputDevice ());
m_sendOutgoingTrace (hdr, packet, interface);
SendRealOut (route, packet, hdr);
return;
}
/* 2) */
if (route && route->GetGateway () == Ipv6Address::GetZero ())
{
NS_LOG_LOGIC ("Ipv6L3Protocol::Send case 1: probably sent to machine on same IPv6 network");
/* NS_FATAL_ERROR ("This case is not yet implemented"); */
hdr = BuildHeader (source, destination, protocol, packet->GetSize (), ttl, tclass);
int32_t interface = GetInterfaceForDevice (route->GetOutputDevice ());
m_sendOutgoingTrace (hdr, packet, interface);
SendRealOut (route, packet, hdr);
return;
}
/* 3) */
NS_LOG_LOGIC ("Ipv6L3Protocol::Send case 3: passed in with no route " << destination);
Socket::SocketErrno err;
Ptr<NetDevice> oif (0);
Ptr<Ipv6Route> newRoute = 0;
hdr = BuildHeader (source, destination, protocol, packet->GetSize (), ttl, tclass);
//for link-local traffic, we need to determine the interface
if (source.IsLinkLocal ()
|| destination.IsLinkLocal ()
|| destination.IsAllNodesMulticast ()
|| destination.IsAllRoutersMulticast ()
|| destination.IsAllHostsMulticast ()
|| destination.IsSolicitedMulticast ())
{
int32_t index = GetInterfaceForAddress (source);
NS_ASSERT (index >= 0);
oif = GetNetDevice (index);
}
newRoute = m_routingProtocol->RouteOutput (packet, hdr, oif, err);
if (newRoute)
{
int32_t interface = GetInterfaceForDevice (newRoute->GetOutputDevice ());
m_sendOutgoingTrace (hdr, packet, interface);
SendRealOut (newRoute, packet, hdr);
}
else
{
NS_LOG_WARN ("No route to host, drop!");
m_dropTrace (hdr, packet, DROP_NO_ROUTE, m_node->GetObject<Ipv6> (), GetInterfaceForDevice (oif));
}
}
void Ipv6L3Protocol::Receive (Ptr<NetDevice> device, Ptr<const Packet> p, uint16_t protocol, const Address &from, const Address &to, NetDevice::PacketType packetType)
{
NS_LOG_FUNCTION (this << device << p << protocol << from << to << packetType);
NS_LOG_LOGIC ("Packet from " << from << " received on node " << m_node->GetId ());
uint32_t interface = 0;
Ptr<Packet> packet = p->Copy ();
Ptr<Ipv6Interface> ipv6Interface = 0;
for (Ipv6InterfaceList::const_iterator it = m_interfaces.begin (); it != m_interfaces.end (); it++)
{
ipv6Interface = *it;
if (ipv6Interface->GetDevice () == device)
{
if (ipv6Interface->IsUp ())
{
m_rxTrace (packet, m_node->GetObject<Ipv6> (), interface);
break;
}
else
{
NS_LOG_LOGIC ("Dropping received packet-- interface is down");
Ipv6Header hdr;
packet->RemoveHeader (hdr);
m_dropTrace (hdr, packet, DROP_INTERFACE_DOWN, m_node->GetObject<Ipv6> (), interface);
return;
}
}
interface++;
}
Ipv6Header hdr;
packet->RemoveHeader (hdr);
// Trim any residual frame padding from underlying devices
if (hdr.GetPayloadLength () < packet->GetSize ())
{
packet->RemoveAtEnd (packet->GetSize () - hdr.GetPayloadLength ());
}
/* forward up to IPv6 raw sockets */
for (SocketList::iterator it = m_sockets.begin (); it != m_sockets.end (); ++it)
{
Ptr<Ipv6RawSocketImpl> socket = *it;
socket->ForwardUp (packet, hdr, device);
}
Ptr<Ipv6ExtensionDemux> ipv6ExtensionDemux = m_node->GetObject<Ipv6ExtensionDemux> ();
Ptr<Ipv6Extension> ipv6Extension = 0;
uint8_t nextHeader = hdr.GetNextHeader ();
bool stopProcessing = false;
bool isDropped = false;
DropReason dropReason;
if (nextHeader == Ipv6Header::IPV6_EXT_HOP_BY_HOP)
{
ipv6Extension = ipv6ExtensionDemux->GetExtension (nextHeader);
if (ipv6Extension)
{
ipv6Extension->Process (packet, 0, hdr, hdr.GetDestinationAddress (), (uint8_t *)0, stopProcessing, isDropped, dropReason);
}
if (isDropped)
{
m_dropTrace (hdr, packet, dropReason, m_node->GetObject<Ipv6> (), interface);
}
if (stopProcessing)
{
return;
}
}
if (!m_routingProtocol->RouteInput (packet, hdr, device,
MakeCallback (&Ipv6L3Protocol::IpForward, this),
MakeCallback (&Ipv6L3Protocol::IpMulticastForward, this),
MakeCallback (&Ipv6L3Protocol::LocalDeliver, this),
MakeCallback (&Ipv6L3Protocol::RouteInputError, this)))
{
NS_LOG_WARN ("No route found for forwarding packet. Drop.");
GetIcmpv6 ()->SendErrorDestinationUnreachable (p->Copy (), hdr.GetSourceAddress (), Icmpv6Header::ICMPV6_NO_ROUTE);
m_dropTrace (hdr, packet, DROP_NO_ROUTE, m_node->GetObject<Ipv6> (), interface);
}
}
void Ipv6L3Protocol::SendRealOut (Ptr<Ipv6Route> route, Ptr<Packet> packet, Ipv6Header const& ipHeader)
{
NS_LOG_FUNCTION (this << route << packet << ipHeader);
if (!route)
{
NS_LOG_LOGIC ("No route to host, drop!.");
return;
}
Ptr<NetDevice> dev = route->GetOutputDevice ();
int32_t interface = GetInterfaceForDevice (dev);
NS_ASSERT (interface >= 0);
Ptr<Ipv6Interface> outInterface = GetInterface (interface);
NS_LOG_LOGIC ("Send via NetDevice ifIndex " << dev->GetIfIndex () << " Ipv6InterfaceIndex " << interface);
// Check packet size
std::list<Ptr<Packet> > fragments;
// Check if we have a Path MTU stored. If so, use it. Else, use the link MTU.
size_t targetMtu = (size_t)(m_pmtuCache->GetPmtu (ipHeader.GetDestinationAddress()));
if (targetMtu == 0)
{
targetMtu = dev->GetMtu ();
}
if (packet->GetSize () > targetMtu + 40) /* 40 => size of IPv6 header */
{
// Router => drop
bool fromMe = false;
for (uint32_t i=0; i<GetNInterfaces(); i++ )
{
for (uint32_t j=0; j<GetNAddresses(i); j++ )
{
if (GetAddress(i,j).GetAddress() == ipHeader.GetSourceAddress())
{
fromMe = true;
break;
}
}
}
if (!fromMe)
{
Ptr<Icmpv6L4Protocol> icmpv6 = GetIcmpv6 ();
if ( icmpv6 )
{
packet->AddHeader(ipHeader);
icmpv6->SendErrorTooBig (packet, ipHeader.GetSourceAddress (), dev->GetMtu ());
}
return;
}
Ptr<Ipv6ExtensionDemux> ipv6ExtensionDemux = m_node->GetObject<Ipv6ExtensionDemux> ();
packet->AddHeader (ipHeader);
// To get specific method GetFragments from Ipv6ExtensionFragmentation
Ipv6ExtensionFragment *ipv6Fragment = dynamic_cast<Ipv6ExtensionFragment *> (PeekPointer (ipv6ExtensionDemux->GetExtension (Ipv6Header::IPV6_EXT_FRAGMENTATION)));
NS_ASSERT (ipv6Fragment != 0);
ipv6Fragment->GetFragments (packet, targetMtu, fragments);
}
if (!route->GetGateway ().IsEqual (Ipv6Address::GetAny ()))
{
if (outInterface->IsUp ())
{
NS_LOG_LOGIC ("Send to gateway " << route->GetGateway ());
if (fragments.size () != 0)
{
std::ostringstream oss;
/* IPv6 header is already added in fragments */
for (std::list<Ptr<Packet> >::const_iterator it = fragments.begin (); it != fragments.end (); it++)
{
m_txTrace (*it, m_node->GetObject<Ipv6> (), interface);
outInterface->Send (*it, route->GetGateway ());
}
}
else
{
packet->AddHeader (ipHeader);
m_txTrace (packet, m_node->GetObject<Ipv6> (), interface);
outInterface->Send (packet, route->GetGateway ());
}
}
else
{
NS_LOG_LOGIC ("Dropping-- outgoing interface is down: " << route->GetGateway ());
m_dropTrace (ipHeader, packet, DROP_INTERFACE_DOWN, m_node->GetObject<Ipv6> (), interface);
}
}
else
{
if (outInterface->IsUp ())
{
NS_LOG_LOGIC ("Send to destination " << ipHeader.GetDestinationAddress ());
if (fragments.size () != 0)
{
std::ostringstream oss;
/* IPv6 header is already added in fragments */
for (std::list<Ptr<Packet> >::const_iterator it = fragments.begin (); it != fragments.end (); it++)
{
m_txTrace (*it, m_node->GetObject<Ipv6> (), interface);
outInterface->Send (*it, ipHeader.GetDestinationAddress ());
}
}
else
{
packet->AddHeader (ipHeader);
m_txTrace (packet, m_node->GetObject<Ipv6> (), interface);
outInterface->Send (packet, ipHeader.GetDestinationAddress ());
}
}
else
{
NS_LOG_LOGIC ("Dropping-- outgoing interface is down: " << ipHeader.GetDestinationAddress ());
m_dropTrace (ipHeader, packet, DROP_INTERFACE_DOWN, m_node->GetObject<Ipv6> (), interface);
}
}
}
void Ipv6L3Protocol::IpForward (Ptr<const NetDevice> idev, Ptr<Ipv6Route> rtentry, Ptr<const Packet> p, const Ipv6Header& header)
{
NS_LOG_FUNCTION (this << rtentry << p << header);
NS_LOG_LOGIC ("Forwarding logic for node: " << m_node->GetId ());
// Drop RFC 3849 packets: 2001:db8::/32
if (header.GetDestinationAddress().IsDocumentation())
{
NS_LOG_WARN ("Received a packet for 2001:db8::/32 (documentation class). Drop.");
m_dropTrace (header, p, DROP_ROUTE_ERROR, m_node->GetObject<Ipv6> (), 0);
return;
}
// Forwarding
Ipv6Header ipHeader = header;
Ptr<Packet> packet = p->Copy ();
ipHeader.SetHopLimit (ipHeader.GetHopLimit () - 1);
if (ipHeader.GetSourceAddress ().IsLinkLocal ())
{
/* no forward for link-local address */
return;
}
if (ipHeader.GetHopLimit () == 0)
{
NS_LOG_WARN ("TTL exceeded. Drop.");
m_dropTrace (ipHeader, packet, DROP_TTL_EXPIRED, m_node->GetObject<Ipv6> (), 0);
// Do not reply to multicast IPv6 address
if (ipHeader.GetDestinationAddress ().IsMulticast () == false)
{
packet->AddHeader (ipHeader);
GetIcmpv6 ()->SendErrorTimeExceeded (packet, ipHeader.GetSourceAddress (), Icmpv6Header::ICMPV6_HOPLIMIT);
}
return;
}
/* ICMPv6 Redirect */
/* if we forward to a machine on the same network as the source,
* we send him an ICMPv6 redirect message to notify him that a short route
* exists.
*/
/* Theoretically we should also check if the redirect target is on the same network
* as the source node. On the other hand, we are sure that the router we're redirecting to
* used a link-local address. As a consequence, they MUST be on the same network, the link-local net.
*/
if (m_sendIcmpv6Redirect && (rtentry->GetOutputDevice ()==idev))
{
NS_LOG_LOGIC ("ICMPv6 redirect!");
Ptr<Icmpv6L4Protocol> icmpv6 = GetIcmpv6 ();
Address hardwareTarget;
Ipv6Address dst = header.GetDestinationAddress ();
Ipv6Address src = header.GetSourceAddress ();
Ipv6Address target = rtentry->GetGateway ();
Ptr<Packet> copy = p->Copy ();
if (target.IsAny ())
{
target = dst;
}
copy->AddHeader (header);
Ipv6Address linkLocal = GetInterface (GetInterfaceForDevice (rtentry->GetOutputDevice ()))->GetLinkLocalAddress ().GetAddress ();
if (icmpv6->Lookup (target, rtentry->GetOutputDevice (), 0, &hardwareTarget))
{
icmpv6->SendRedirection (copy, linkLocal, src, target, dst, hardwareTarget);
}
else
{
icmpv6->SendRedirection (copy, linkLocal, src, target, dst, Address ());
}
}
int32_t interface = GetInterfaceForDevice (rtentry->GetOutputDevice ());
m_unicastForwardTrace (ipHeader, packet, interface);
SendRealOut (rtentry, packet, ipHeader);
}
void Ipv6L3Protocol::IpMulticastForward (Ptr<const NetDevice> idev, Ptr<Ipv6MulticastRoute> mrtentry, Ptr<const Packet> p, const Ipv6Header& header)
{
NS_LOG_FUNCTION (this << mrtentry << p << header);
NS_LOG_LOGIC ("Multicast forwarding logic for node: " << m_node->GetId ());
std::map<uint32_t, uint32_t> ttlMap = mrtentry->GetOutputTtlMap ();
std::map<uint32_t, uint32_t>::iterator mapIter;
for (mapIter = ttlMap.begin (); mapIter != ttlMap.end (); mapIter++)
{
uint32_t interfaceId = mapIter->first;
//uint32_t outputTtl = mapIter->second; // Unused for now
Ptr<Packet> packet = p->Copy ();
Ipv6Header h = header;
h.SetHopLimit (header.GetHopLimit () - 1);
if (h.GetHopLimit () == 0)
{
NS_LOG_WARN ("TTL exceeded. Drop.");
m_dropTrace (header, packet, DROP_TTL_EXPIRED, m_node->GetObject<Ipv6> (), interfaceId);
return;
}
NS_LOG_LOGIC ("Forward multicast via interface " << interfaceId);
Ptr<Ipv6Route> rtentry = Create<Ipv6Route> ();
rtentry->SetSource (h.GetSourceAddress ());
rtentry->SetDestination (h.GetDestinationAddress ());
rtentry->SetGateway (Ipv6Address::GetAny ());
rtentry->SetOutputDevice (GetNetDevice (interfaceId));
SendRealOut (rtentry, packet, h);
continue;
}
}
void Ipv6L3Protocol::LocalDeliver (Ptr<const Packet> packet, Ipv6Header const& ip, uint32_t iif)
{
NS_LOG_FUNCTION (this << packet << ip << iif);
Ptr<Packet> p = packet->Copy ();
Ptr<IpL4Protocol> protocol = 0;
Ptr<Ipv6ExtensionDemux> ipv6ExtensionDemux = m_node->GetObject<Ipv6ExtensionDemux> ();
Ptr<Ipv6Extension> ipv6Extension = 0;
Ipv6Address src = ip.GetSourceAddress ();
Ipv6Address dst = ip.GetDestinationAddress ();
uint8_t nextHeader = ip.GetNextHeader ();
uint8_t nextHeaderPosition = 0;
bool isDropped = false;
bool stopProcessing = false;
DropReason dropReason;
// check for a malformed hop-by-hop extension
// this is a common case when forging IPv6 raw packets
if (nextHeader == Ipv6Header::IPV6_EXT_HOP_BY_HOP)
{
uint8_t buf;
p->CopyData (&buf, 1);
if (buf == Ipv6Header::IPV6_EXT_HOP_BY_HOP)
{
NS_LOG_WARN("Double Ipv6Header::IPV6_EXT_HOP_BY_HOP in packet, dropping packet");
return;
}
}
/* process all the extensions found and the layer 4 protocol */
do
{
/* it return 0 for non-extension (i.e. layer 4 protocol) */
ipv6Extension = ipv6ExtensionDemux->GetExtension (nextHeader);
if (ipv6Extension)
{
uint8_t nextHeaderStep = 0;
uint8_t curHeader = nextHeader;
nextHeaderStep = ipv6Extension->Process (p, nextHeaderPosition, ip, dst, &nextHeader, stopProcessing, isDropped, dropReason);
nextHeaderPosition += nextHeaderStep;
if (isDropped)
{
m_dropTrace (ip, packet, dropReason, m_node->GetObject<Ipv6> (), iif);
}
if (stopProcessing)
{
return;
}
NS_ASSERT_MSG (nextHeaderStep != 0 || curHeader == Ipv6Header::IPV6_EXT_FRAGMENTATION,
"Zero-size IPv6 Option Header, aborting" << *packet );
}
else
{
protocol = GetProtocol (nextHeader);
// For ICMPv6 Error packets
Ptr<Packet> malformedPacket = packet->Copy ();
malformedPacket->AddHeader (ip);
if (!protocol)
{
NS_LOG_LOGIC ("Unknown Next Header. Drop!");
if (nextHeaderPosition == 0)
{
GetIcmpv6 ()->SendErrorParameterError (malformedPacket, dst, Icmpv6Header::ICMPV6_UNKNOWN_NEXT_HEADER, 40);
}
else
{
GetIcmpv6 ()->SendErrorParameterError (malformedPacket, dst, Icmpv6Header::ICMPV6_UNKNOWN_NEXT_HEADER, ip.GetSerializedSize () + nextHeaderPosition);
}
m_dropTrace (ip, p, DROP_UNKNOWN_PROTOCOL, m_node->GetObject<Ipv6> (), iif);
break;
}
else
{
p->RemoveAtStart (nextHeaderPosition);
/* protocol->Receive (p, src, dst, incomingInterface); */
/* L4 protocol */
Ptr<Packet> copy = p->Copy ();
m_localDeliverTrace (ip, p, iif);
enum IpL4Protocol::RxStatus status = protocol->Receive (p, ip, GetInterface (iif));
switch (status)
{
case IpL4Protocol::RX_OK:
break;
case IpL4Protocol::RX_CSUM_FAILED:
break;
case IpL4Protocol::RX_ENDPOINT_CLOSED:
break;
case IpL4Protocol::RX_ENDPOINT_UNREACH:
if (ip.GetDestinationAddress ().IsMulticast ())
{
/* do not rely on multicast address */
break;
}
copy->AddHeader (ip);
GetIcmpv6 ()->SendErrorDestinationUnreachable (copy, ip.GetSourceAddress (), Icmpv6Header::ICMPV6_PORT_UNREACHABLE);
}
}
}
}
while (ipv6Extension);
}
void Ipv6L3Protocol::RouteInputError (Ptr<const Packet> p, const Ipv6Header& ipHeader, Socket::SocketErrno sockErrno)
{
NS_LOG_FUNCTION (this << p << ipHeader << sockErrno);
NS_LOG_LOGIC ("Route input failure-- dropping packet to " << ipHeader << " with errno " << sockErrno);
m_dropTrace (ipHeader, p, DROP_ROUTE_ERROR, m_node->GetObject<Ipv6> (), 0);
}
Ipv6Header Ipv6L3Protocol::BuildHeader (Ipv6Address src, Ipv6Address dst, uint8_t protocol, uint16_t payloadSize, uint8_t ttl, uint8_t tclass)
{
NS_LOG_FUNCTION (this << src << dst << (uint32_t)protocol << (uint32_t)payloadSize << (uint32_t)ttl << (uint32_t)tclass);
Ipv6Header hdr;
hdr.SetSourceAddress (src);
hdr.SetDestinationAddress (dst);
hdr.SetNextHeader (protocol);
hdr.SetPayloadLength (payloadSize);
hdr.SetHopLimit (ttl);
hdr.SetTrafficClass (tclass);
return hdr;
}
void Ipv6L3Protocol::RegisterExtensions ()
{
Ptr<Ipv6ExtensionDemux> ipv6ExtensionDemux = CreateObject<Ipv6ExtensionDemux> ();
ipv6ExtensionDemux->SetNode (m_node);
Ptr<Ipv6ExtensionHopByHop> hopbyhopExtension = CreateObject<Ipv6ExtensionHopByHop> ();
hopbyhopExtension->SetNode (m_node);
Ptr<Ipv6ExtensionDestination> destinationExtension = CreateObject<Ipv6ExtensionDestination> ();
destinationExtension->SetNode (m_node);
Ptr<Ipv6ExtensionFragment> fragmentExtension = CreateObject<Ipv6ExtensionFragment> ();
fragmentExtension->SetNode (m_node);
Ptr<Ipv6ExtensionRouting> routingExtension = CreateObject<Ipv6ExtensionRouting> ();
routingExtension->SetNode (m_node);
// Ptr<Ipv6ExtensionESP> espExtension = CreateObject<Ipv6ExtensionESP> ();
// Ptr<Ipv6ExtensionAH> ahExtension = CreateObject<Ipv6ExtensionAH> ();
ipv6ExtensionDemux->Insert (hopbyhopExtension);
ipv6ExtensionDemux->Insert (destinationExtension);
ipv6ExtensionDemux->Insert (fragmentExtension);
ipv6ExtensionDemux->Insert (routingExtension);
// ipv6ExtensionDemux->Insert (espExtension);
// ipv6ExtensionDemux->Insert (ahExtension);
Ptr<Ipv6ExtensionRoutingDemux> routingExtensionDemux = CreateObject<Ipv6ExtensionRoutingDemux> ();
routingExtensionDemux->SetNode (m_node);
Ptr<Ipv6ExtensionLooseRouting> looseRoutingExtension = CreateObject<Ipv6ExtensionLooseRouting> ();
looseRoutingExtension->SetNode (m_node);
routingExtensionDemux->Insert (looseRoutingExtension);
m_node->AggregateObject (routingExtensionDemux);
m_node->AggregateObject (ipv6ExtensionDemux);
}
void Ipv6L3Protocol::RegisterOptions ()
{
Ptr<Ipv6OptionDemux> ipv6OptionDemux = CreateObject<Ipv6OptionDemux> ();
ipv6OptionDemux->SetNode (m_node);
Ptr<Ipv6OptionPad1> pad1Option = CreateObject<Ipv6OptionPad1> ();
pad1Option->SetNode (m_node);
Ptr<Ipv6OptionPadn> padnOption = CreateObject<Ipv6OptionPadn> ();
padnOption->SetNode (m_node);
Ptr<Ipv6OptionJumbogram> jumbogramOption = CreateObject<Ipv6OptionJumbogram> ();
jumbogramOption->SetNode (m_node);
Ptr<Ipv6OptionRouterAlert> routerAlertOption = CreateObject<Ipv6OptionRouterAlert> ();
routerAlertOption->SetNode (m_node);
ipv6OptionDemux->Insert (pad1Option);
ipv6OptionDemux->Insert (padnOption);
ipv6OptionDemux->Insert (jumbogramOption);
ipv6OptionDemux->Insert (routerAlertOption);
m_node->AggregateObject (ipv6OptionDemux);
}
void Ipv6L3Protocol::ReportDrop (Ipv6Header ipHeader, Ptr<Packet> p, DropReason dropReason)
{
m_dropTrace (ipHeader, p, dropReason, m_node->GetObject<Ipv6> (), 0);
}
} /* namespace ns3 */