455 lines
11 KiB
C++
455 lines
11 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2007-2009 Strasbourg University
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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: Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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*/
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#include "ns3/log.h"
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#include "ns3/node.h"
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#include "ns3/packet.h"
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#include "ipv6-interface.h"
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#include "ns3/net-device.h"
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#include "loopback-net-device.h"
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#include "ipv6-l3-protocol.h"
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#include "icmpv6-l4-protocol.h"
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#include "ndisc-cache.h"
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namespace ns3
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{
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NS_LOG_COMPONENT_DEFINE ("Ipv6Interface");
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TypeId Ipv6Interface::GetTypeId ()
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{
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static TypeId tid = TypeId ("ns3::Ipv6Interface")
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.SetParent<Object> ()
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;
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return tid;
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}
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Ipv6Interface::Ipv6Interface ()
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: m_ifup (false),
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m_forwarding (true),
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m_metric (1),
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m_node (0),
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m_device (0),
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m_curHopLimit (0),
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m_baseReachableTime (0),
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m_reachableTime (0),
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m_retransTimer (0)
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{
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NS_LOG_FUNCTION (this);
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}
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Ipv6Interface::~Ipv6Interface ()
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{
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NS_LOG_FUNCTION_NOARGS ();
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}
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void Ipv6Interface::DoDispose ()
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{
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NS_LOG_FUNCTION_NOARGS ();
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Object::DoDispose ();
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}
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void Ipv6Interface::DoSetup ()
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{
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NS_LOG_FUNCTION_NOARGS ();
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if (m_node == 0 || m_device == 0)
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{
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return;
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}
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/* set up link-local address */
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if (!DynamicCast<LoopbackNetDevice> (m_device)) /* no autoconf for ip6-localhost */
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{
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Address addr = GetDevice ()->GetAddress ();
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if (Mac48Address::IsMatchingType (addr))
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{
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Ipv6InterfaceAddress ifaddr = Ipv6InterfaceAddress (Ipv6Address::MakeAutoconfiguredLinkLocalAddress (Mac48Address::ConvertFrom (addr)), Ipv6Prefix (64));
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AddAddress (ifaddr);
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}
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else
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{
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NS_ASSERT_MSG (false, "IPv6 autoconf for this kind of address not implemented.");
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}
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}
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else
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{
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return; /* no NDISC cache for ip6-localhost */
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}
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Ptr<Icmpv6L4Protocol> icmpv6 = m_node->GetObject<Ipv6L3Protocol> ()->GetIcmpv6 ();
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m_ndCache = icmpv6->CreateCache (m_device, this);
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}
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void Ipv6Interface::SetNode (Ptr<Node> node)
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{
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NS_LOG_FUNCTION (this << node);
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m_node = node;
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DoSetup ();
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}
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void Ipv6Interface::SetDevice (Ptr<NetDevice> device)
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{
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NS_LOG_FUNCTION (this << device);
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m_device = device;
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DoSetup ();
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}
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Ptr<NetDevice> Ipv6Interface::GetDevice () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_device;
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}
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void Ipv6Interface::SetMetric (uint16_t metric)
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{
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NS_LOG_FUNCTION (this << metric);
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m_metric = metric;
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}
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uint16_t Ipv6Interface::GetMetric () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_metric;
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}
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bool Ipv6Interface::IsUp () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_ifup;
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}
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bool Ipv6Interface::IsDown () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return !m_ifup;
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}
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void Ipv6Interface::SetUp ()
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{
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NS_LOG_FUNCTION_NOARGS ();
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if (m_ifup)
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{
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return;
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}
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m_ifup = true;
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}
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void Ipv6Interface::SetDown ()
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{
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NS_LOG_FUNCTION_NOARGS ();
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m_ifup = false;
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m_addresses.clear ();
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}
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bool Ipv6Interface::IsForwarding () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_forwarding;
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}
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void Ipv6Interface::SetForwarding (bool forwarding)
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{
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NS_LOG_FUNCTION (this << forwarding);
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m_forwarding = forwarding;
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}
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bool Ipv6Interface::AddAddress (Ipv6InterfaceAddress iface)
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{
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NS_LOG_FUNCTION_NOARGS ();
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Ipv6Address addr = iface.GetAddress ();
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/* DAD handling */
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if (!addr.IsAny ())
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{
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for (Ipv6InterfaceAddressListCI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if ((*it).GetAddress () == addr)
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{
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return false;
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}
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}
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m_addresses.push_back (iface);
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if (!addr.IsAny () || !addr.IsLocalhost ())
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{
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/* DAD handling */
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Ptr<Icmpv6L4Protocol> icmpv6 = m_node->GetObject<Ipv6L3Protocol> ()->GetIcmpv6 ();
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if (icmpv6 && icmpv6->IsAlwaysDad ())
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{
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Simulator::Schedule (Seconds (0.), &Icmpv6L4Protocol::DoDAD, icmpv6, addr, this);
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Simulator::Schedule (Seconds (1.), &Icmpv6L4Protocol::FunctionDadTimeout, icmpv6, this, addr);
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}
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}
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return true;
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}
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/* bad address */
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return false;
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}
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Ipv6InterfaceAddress Ipv6Interface::GetLinkLocalAddress () const
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{
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/* IPv6 interface has always at least one IPv6 link-local address */
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NS_LOG_FUNCTION_NOARGS ();
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for (Ipv6InterfaceAddressListCI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if ((*it).GetAddress ().IsLinkLocal ())
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{
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return (*it);
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}
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}
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NS_ASSERT_MSG (false, "No link-local address on interface " << this);
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Ipv6InterfaceAddress addr;
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return addr; /* quiet compiler */
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}
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Ipv6InterfaceAddress Ipv6Interface::GetAddress (uint32_t index) const
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{
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NS_LOG_FUNCTION (this << index);
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uint32_t i = 0;
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if (m_addresses.size () > index)
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{
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for (Ipv6InterfaceAddressListCI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if (i == index)
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{
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return (*it);
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}
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i++;
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}
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}
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NS_ASSERT_MSG (false, "Address " << index << " not found");
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Ipv6InterfaceAddress addr;
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return addr; /* quiet compiler */
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}
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uint32_t Ipv6Interface::GetNAddresses () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_addresses.size ();
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}
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Ipv6InterfaceAddress Ipv6Interface::RemoveAddress (uint32_t index)
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{
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NS_LOG_FUNCTION (this << index);
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uint32_t i = 0;
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if (m_addresses.size () < index)
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{
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NS_ASSERT_MSG (false, "Try to remove index that don't exist in Ipv6Interface::RemoveAddress");
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}
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for (Ipv6InterfaceAddressListI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if (i == index)
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{
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Ipv6InterfaceAddress iface = (*it);
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m_addresses.erase (it);
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return iface;
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}
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i++;
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}
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NS_ASSERT_MSG (false, "Address " << index << " not found");
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Ipv6InterfaceAddress addr;
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return addr; /* quiet compiler */
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}
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Ipv6InterfaceAddress Ipv6Interface::GetAddressMatchingDestination (Ipv6Address dst)
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{
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NS_LOG_FUNCTION (this << dst);
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for (Ipv6InterfaceAddressList::const_iterator it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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Ipv6InterfaceAddress ifaddr = (*it);
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if (ifaddr.GetPrefix ().IsMatch (ifaddr.GetAddress (), dst))
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{
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return ifaddr;
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}
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}
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/* NS_ASSERT_MSG (false, "Not matching address."); */
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Ipv6InterfaceAddress ret;
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return ret; /* quiet compiler */
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}
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void Ipv6Interface::Send (Ptr<Packet> p, Ipv6Address dest)
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{
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NS_LOG_FUNCTION (this << p << dest);
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Ptr<Ipv6L3Protocol> ipv6 = m_node->GetObject<Ipv6L3Protocol> ();
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if (!IsUp ())
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{
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return;
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}
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/* check if destination is localhost (::1) */
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if (DynamicCast<LoopbackNetDevice> (m_device))
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{
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/* XXX additional checks needed here (such as whether multicast
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* goes to loopback)?
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*/
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m_device->Send (p, m_device->GetBroadcast (), Ipv6L3Protocol::PROT_NUMBER);
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return;
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}
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/* check if destination is for one of our interface */
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for (Ipv6InterfaceAddressListCI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if (dest == (*it).GetAddress ())
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{
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ipv6->Receive (m_device, p, Ipv6L3Protocol::PROT_NUMBER,
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m_device->GetBroadcast (),
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m_device->GetBroadcast (),
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NetDevice::PACKET_HOST // note: linux uses PACKET_LOOPBACK here
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);
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return;
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}
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}
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/* other address */
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if (m_device->NeedsArp ())
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{
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NS_LOG_LOGIC ("Needs ARP" << " " << dest);
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Ptr<Icmpv6L4Protocol> icmpv6 = ipv6->GetIcmpv6 ();
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Address hardwareDestination;
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bool found = false;
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NS_ASSERT (icmpv6);
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if (dest.IsMulticast ())
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{
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NS_LOG_LOGIC ("IsMulticast");
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NS_ASSERT_MSG (m_device->IsMulticast (), "Ipv6Interface::SendTo (): Sending multicast packet over non-multicast device");
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hardwareDestination = m_device->GetMulticast (dest);
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found = true;
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}
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else
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{
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NS_LOG_LOGIC ("NDISC Lookup");
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found = icmpv6->Lookup (p, dest, GetDevice (), m_ndCache, &hardwareDestination);
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}
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if (found)
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{
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NS_LOG_LOGIC ("Address Resolved. Send.");
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m_device ->Send (p, hardwareDestination, Ipv6L3Protocol::PROT_NUMBER);
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}
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}
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else
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{
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NS_LOG_LOGIC ("Doesn't need ARP");
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m_device->Send (p, m_device->GetBroadcast (), Ipv6L3Protocol::PROT_NUMBER);
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}
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}
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void Ipv6Interface::SetCurHopLimit (uint8_t curHopLimit)
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{
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NS_LOG_FUNCTION (this << curHopLimit);
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m_curHopLimit = curHopLimit;
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}
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uint8_t Ipv6Interface::GetCurHopLimit () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_curHopLimit;
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}
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void Ipv6Interface::SetBaseReachableTime (uint16_t baseReachableTime)
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{
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NS_LOG_FUNCTION (this << baseReachableTime);
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m_baseReachableTime = baseReachableTime;
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}
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uint16_t Ipv6Interface::GetBaseReachableTime () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_baseReachableTime;
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}
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void Ipv6Interface::SetReachableTime (uint16_t reachableTime)
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{
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NS_LOG_FUNCTION (this << reachableTime);
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m_reachableTime = reachableTime;
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}
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uint16_t Ipv6Interface::GetReachableTime () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_reachableTime;
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}
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void Ipv6Interface::SetRetransTimer (uint16_t retransTimer)
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{
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NS_LOG_FUNCTION (this << retransTimer);
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m_retransTimer = retransTimer;
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}
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uint16_t Ipv6Interface::GetRetransTimer () const
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{
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NS_LOG_FUNCTION_NOARGS ();
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return m_retransTimer;
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}
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void Ipv6Interface::SetState (Ipv6Address address, Ipv6InterfaceAddress::State_e state)
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{
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NS_LOG_FUNCTION (this << address << state);
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for (Ipv6InterfaceAddressListI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if ((*it).GetAddress () == address)
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{
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(*it).SetState (state);
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return;
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}
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}
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/* not found, maybe address has expired */
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}
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void Ipv6Interface::SetNsDadUid (Ipv6Address address, uint32_t uid)
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{
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NS_LOG_FUNCTION (this << address << uid);
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for (Ipv6InterfaceAddressListI it = m_addresses.begin () ; it != m_addresses.end () ; ++it)
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{
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if ((*it).GetAddress () == address)
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{
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(*it).SetNsDadUid (uid);
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return;
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}
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}
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/* not found, maybe address has expired */
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}
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} /* namespace ns3 */
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