/* -*- 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/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 "loopback-net-device.h"
#include "ipv6-l3-protocol.h"
#include "ipv6-l4-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"
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 ("InterfaceList", "The set of IPv6 interfaces associated to this IPv6 stack.",
ObjectVectorValue (),
MakeObjectVectorAccessor (&Ipv6L3Protocol::m_interfaces),
MakeObjectVectorChecker<Ipv6Interface> ())
.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))
;
return tid;
}
Ipv6L3Protocol::Ipv6L3Protocol ()
: m_nInterfaces (0)
{
NS_LOG_FUNCTION_NOARGS ();
}
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;
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 */
{
/* XXX : add other L2 address case */
if (Mac48Address::IsMatchingType (addr))
{
address = Ipv6InterfaceAddress (Ipv6Address::MakeAutoconfiguredAddress (Mac48Address::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
*/
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 = Ipv6Address::MakeAutoconfiguredAddress (Mac48Address::ConvertFrom (addr), network);
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;
}
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);
Ptr<Ipv6Interface> interface = GetInterface (i);
return interface->GetDevice ()->GetMtu ();
}
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);
interface->SetUp ();
if (m_routingProtocol != 0)
{
m_routingProtocol->NotifyInterfaceUp (i);
}
}
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);
}
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::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<Ipv6L4Protocol> protocol)
{
NS_LOG_FUNCTION (this << protocol);
m_protocols.push_back (protocol);
}
void Ipv6L3Protocol::Remove (Ptr<Ipv6L4Protocol> protocol)
{
NS_LOG_FUNCTION (this << protocol);
m_protocols.remove (protocol);
}
Ptr<Ipv6L4Protocol> 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<Ipv6L4Protocol> 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::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;
SocketIpTtlTag tag;
bool found = packet->RemovePacketTag (tag);
if (found)
{
ttl = tag.GetTtl ();
}
/* 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);
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);
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);
//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)
{
SendRealOut (newRoute, packet, hdr);
}
else
{
NS_LOG_WARN ("No route to host, drop!");
m_dropTrace (hdr, packet, DROP_NO_ROUTE, 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, interface);
break;
}
else
{
NS_LOG_LOGIC ("Dropping received packet-- interface is down");
Ipv6Header hdr;
packet->RemoveHeader (hdr);
m_dropTrace (hdr, packet, DROP_INTERFACE_DOWN, 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 isDropped = false;
if (nextHeader == Ipv6Header::IPV6_EXT_HOP_BY_HOP)
{
ipv6Extension = ipv6ExtensionDemux->GetExtension (nextHeader);
if (ipv6Extension)
{
ipv6Extension->Process (packet, 0, hdr, hdr.GetDestinationAddress (), (uint8_t *)0, isDropped);
}
if (isDropped)
{
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.");
m_dropTrace (hdr, packet, DROP_NO_ROUTE, 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;
if (packet->GetSize () > (size_t)(dev->GetMtu () + 40)) /* 40 => size of IPv6 header */
{
// Router => drop
if (m_ipForward)
{
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)));
ipv6Fragment->GetFragments (packet, outInterface->GetDevice ()->GetMtu (), 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, interface);
outInterface->Send (*it, route->GetGateway ());
}
}
else
{
packet->AddHeader (ipHeader);
m_txTrace (packet, interface);
outInterface->Send (packet, route->GetGateway ());
}
}
else
{
NS_LOG_LOGIC ("Dropping-- outgoing interface is down: " << route->GetGateway ());
m_dropTrace (ipHeader, packet, DROP_INTERFACE_DOWN, 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, interface);
outInterface->Send (*it, ipHeader.GetDestinationAddress ());
}
}
else
{
packet->AddHeader (ipHeader);
m_txTrace (packet, interface);
outInterface->Send (packet, ipHeader.GetDestinationAddress ());
}
}
else
{
NS_LOG_LOGIC ("Dropping-- outgoing interface is down: " << ipHeader.GetDestinationAddress ());
m_dropTrace (ipHeader, packet, DROP_INTERFACE_DOWN, interface);
}
}
}
void Ipv6L3Protocol::IpForward (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 ());
// 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, 0);
// Do not reply to ICMPv6 or to multicast IPv6 address
if (ipHeader.GetNextHeader () != Icmpv6L4Protocol::PROT_NUMBER &&
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.
*/
if ((!rtentry->GetGateway ().IsAny () && rtentry->GetGateway ().CombinePrefix (Ipv6Prefix (64)) == header.GetSourceAddress ().CombinePrefix (Ipv6Prefix (64))) ||
(rtentry->GetDestination ().CombinePrefix (Ipv6Prefix (64)) == header.GetSourceAddress ().CombinePrefix (Ipv6Prefix (64))))
{
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);
if (icmpv6->Lookup (target, rtentry->GetOutputDevice (), 0, &hardwareTarget))
{
icmpv6->SendRedirection (copy, src, target, dst, hardwareTarget);
}
else
{
icmpv6->SendRedirection (copy, src, target, dst, Address ());
}
}
SendRealOut (rtentry, packet, ipHeader);
}
void Ipv6L3Protocol::IpMulticastForward (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 ());
// The output interfaces we could forward this onto are encoded
// in the OutputTtl of the Ipv6MulticastRoute
for (uint32_t i = 0 ; i < Ipv6MulticastRoute::MAX_INTERFACES ; i++)
{
if (mrtentry->GetOutputTtl (i) < Ipv6MulticastRoute::MAX_TTL)
{
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, i);
return;
}
NS_LOG_LOGIC ("Forward multicast via interface " << i);
Ptr<Ipv6Route> rtentry = Create<Ipv6Route> ();
rtentry->SetSource (h.GetSourceAddress ());
rtentry->SetDestination (h.GetDestinationAddress ());
rtentry->SetGateway (Ipv6Address::GetAny ());
rtentry->SetOutputDevice (GetNetDevice (i));
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<Ipv6L4Protocol> 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;
/* process hop-by-hop extension first if exists */
if (nextHeader == Ipv6Header::IPV6_EXT_HOP_BY_HOP)
{
uint8_t buf[2];
p->CopyData(buf, sizeof(buf));
nextHeader = buf[0];
nextHeaderPosition = buf[1];
}
/* 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)
{
nextHeaderPosition += ipv6Extension->Process (p, nextHeaderPosition, ip, dst, &nextHeader, isDropped);
if (isDropped)
{
return;
}
}
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, iif);
break;
}
else
{
p->RemoveAtStart (nextHeaderPosition);
/* protocol->Receive (p, src, dst, incomingInterface); */
/* L4 protocol */
Ptr<Packet> copy = p->Copy ();
enum Ipv6L4Protocol::RxStatus_e status = protocol->Receive (p, ip.GetSourceAddress (), ip.GetDestinationAddress (), GetInterface (iif));
switch (status)
{
case Ipv6L4Protocol::RX_OK:
break;
case Ipv6L4Protocol::RX_CSUM_FAILED:
break;
case Ipv6L4Protocol::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, 0);
}
Ipv6Header Ipv6L3Protocol::BuildHeader (Ipv6Address src, Ipv6Address dst, uint8_t protocol, uint16_t payloadSize, uint8_t ttl)
{
NS_LOG_FUNCTION (this << src << dst << (uint32_t)protocol << (uint32_t)payloadSize << (uint32_t)ttl);
Ipv6Header hdr;
hdr.SetSourceAddress (src);
hdr.SetDestinationAddress (dst);
hdr.SetNextHeader (protocol);
hdr.SetPayloadLength (payloadSize);
hdr.SetHopLimit (ttl);
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);
}
} /* namespace ns3 */