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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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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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* Based on simple-global-routing.cc |
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* The Tunnel class adds two tunnels, n0<=>n3 and n1<=>n3 |
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*/ |
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|
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// Network topology |
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// |
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// n0 |
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// \ 5 Mb/s, 2ms |
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// \ 1.5Mb/s, 10ms |
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// n2 -------------------------n3 |
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// / |
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// / 5 Mb/s, 2ms |
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// n1 |
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// |
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// - all links are point-to-point links with indicated one-way BW/delay |
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// - Tracing of queues and packet receptions to file "virtual-net-device.tr" |
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|
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// Tunneling changes (relative to the simple-global-routing example): |
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// - n0 will receive an extra virtual interface with hardcoded inner-tunnel address 11.0.0.1 |
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// - n1 will also receive an extra virtual interface with the same inner-tunnel address 11.0.0.1 |
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// - n3 will receive an extra virtual interface with inner-tunnel address 11.0.0.254 |
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// - The flows will be between 11.0.0.x (inner-tunnel) addresses instead of 10.1.x.y ones |
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// - n3 will decide, on a per-packet basis, via random number, whether to |
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// send the packet to n0 or to n1. |
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// |
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// Note: here we create a tunnel where IP packets are tunneled over |
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// UDP/IP, but tunneling directly IP-over-IP would also be possible; |
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// see src/node/ipv4-raw-socket-factory.h. |
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|
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#include <iostream> |
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#include <fstream> |
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#include <string> |
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#include <cassert> |
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|
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#include "ns3/core-module.h" |
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#include "ns3/network-module.h" |
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#include "ns3/internet-module.h" |
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#include "ns3/point-to-point-module.h" |
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#include "ns3/applications-module.h" |
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#include "ns3/virtual-net-device.h" |
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|
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using namespace ns3; |
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|
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NS_LOG_COMPONENT_DEFINE ("VirtualNetDeviceExample"); |
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|
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class Tunnel |
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{ |
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Ptr<Socket> m_n3Socket; |
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Ptr<Socket> m_n0Socket; |
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Ptr<Socket> m_n1Socket; |
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Ipv4Address m_n3Address; |
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Ipv4Address m_n0Address; |
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Ipv4Address m_n1Address; |
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Ptr<UniformRandomVariable> m_rng; |
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Ptr<VirtualNetDevice> m_n0Tap; |
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Ptr<VirtualNetDevice> m_n1Tap; |
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Ptr<VirtualNetDevice> m_n3Tap; |
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|
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|
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bool |
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N0VirtualSend (Ptr<Packet> packet, const Address& source, const Address& dest, uint16_t protocolNumber) |
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{ |
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NS_LOG_DEBUG ("Send to " << m_n3Address << ": " << *packet); |
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m_n0Socket->SendTo (packet, 0, InetSocketAddress (m_n3Address, 667)); |
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return true; |
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} |
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|
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bool |
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N1VirtualSend (Ptr<Packet> packet, const Address& source, const Address& dest, uint16_t protocolNumber) |
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{ |
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NS_LOG_DEBUG ("Send to " << m_n3Address << ": " << *packet); |
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m_n1Socket->SendTo (packet, 0, InetSocketAddress (m_n3Address, 667)); |
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return true; |
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} |
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|
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bool |
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N3VirtualSend (Ptr<Packet> packet, const Address& source, const Address& dest, uint16_t protocolNumber) |
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{ |
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if (m_rng->GetValue () < 0.25) |
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{ |
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NS_LOG_DEBUG ("Send to " << m_n0Address << ": " << *packet); |
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m_n3Socket->SendTo (packet, 0, InetSocketAddress (m_n0Address, 667)); |
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} |
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else |
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{ |
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NS_LOG_DEBUG ("Send to " << m_n1Address << ": " << *packet); |
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m_n3Socket->SendTo (packet, 0, InetSocketAddress (m_n1Address, 667)); |
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} |
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return true; |
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} |
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|
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void N3SocketRecv (Ptr<Socket> socket) |
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{ |
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Ptr<Packet> packet = socket->Recv (65535, 0); |
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NS_LOG_DEBUG ("N3SocketRecv: " << *packet); |
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m_n3Tap->Receive (packet, 0x0800, m_n3Tap->GetAddress (), m_n3Tap->GetAddress (), NetDevice::PACKET_HOST); |
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} |
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|
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void N0SocketRecv (Ptr<Socket> socket) |
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{ |
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Ptr<Packet> packet = socket->Recv (65535, 0); |
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NS_LOG_DEBUG ("N0SocketRecv: " << *packet); |
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m_n0Tap->Receive (packet, 0x0800, m_n0Tap->GetAddress (), m_n0Tap->GetAddress (), NetDevice::PACKET_HOST); |
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} |
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|
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void N1SocketRecv (Ptr<Socket> socket) |
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{ |
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Ptr<Packet> packet = socket->Recv (65535, 0); |
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NS_LOG_DEBUG ("N1SocketRecv: " << *packet); |
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m_n1Tap->Receive (packet, 0x0800, m_n1Tap->GetAddress (), m_n1Tap->GetAddress (), NetDevice::PACKET_HOST); |
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} |
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|
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public: |
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|
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Tunnel (Ptr<Node> n3, Ptr<Node> n0, Ptr<Node> n1, |
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Ipv4Address n3Addr, Ipv4Address n0Addr, Ipv4Address n1Addr) |
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: m_n3Address (n3Addr), m_n0Address (n0Addr), m_n1Address (n1Addr) |
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{ |
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m_rng = CreateObject<UniformRandomVariable> (); |
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m_n3Socket = Socket::CreateSocket (n3, TypeId::LookupByName ("ns3::UdpSocketFactory")); |
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m_n3Socket->Bind (InetSocketAddress (Ipv4Address::GetAny (), 667)); |
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m_n3Socket->SetRecvCallback (MakeCallback (&Tunnel::N3SocketRecv, this)); |
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|
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m_n0Socket = Socket::CreateSocket (n0, TypeId::LookupByName ("ns3::UdpSocketFactory")); |
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m_n0Socket->Bind (InetSocketAddress (Ipv4Address::GetAny (), 667)); |
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m_n0Socket->SetRecvCallback (MakeCallback (&Tunnel::N0SocketRecv, this)); |
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|
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m_n1Socket = Socket::CreateSocket (n1, TypeId::LookupByName ("ns3::UdpSocketFactory")); |
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m_n1Socket->Bind (InetSocketAddress (Ipv4Address::GetAny (), 667)); |
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m_n1Socket->SetRecvCallback (MakeCallback (&Tunnel::N1SocketRecv, this)); |
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|
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// n0 tap device |
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m_n0Tap = CreateObject<VirtualNetDevice> (); |
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m_n0Tap->SetAddress (Mac48Address ("11:00:01:02:03:01")); |
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m_n0Tap->SetSendCallback (MakeCallback (&Tunnel::N0VirtualSend, this)); |
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n0->AddDevice (m_n0Tap); |
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Ptr<Ipv4> ipv4 = n0->GetObject<Ipv4> (); |
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uint32_t i = ipv4->AddInterface (m_n0Tap); |
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ipv4->AddAddress (i, Ipv4InterfaceAddress (Ipv4Address ("11.0.0.1"), Ipv4Mask ("255.255.255.0"))); |
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ipv4->SetUp (i); |
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|
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// n1 tap device |
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m_n1Tap = CreateObject<VirtualNetDevice> (); |
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m_n1Tap->SetAddress (Mac48Address ("11:00:01:02:03:02")); |
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m_n1Tap->SetSendCallback (MakeCallback (&Tunnel::N1VirtualSend, this)); |
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n1->AddDevice (m_n1Tap); |
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ipv4 = n1->GetObject<Ipv4> (); |
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i = ipv4->AddInterface (m_n1Tap); |
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ipv4->AddAddress (i, Ipv4InterfaceAddress (Ipv4Address ("11.0.0.1"), Ipv4Mask ("255.255.255.0"))); |
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ipv4->SetUp (i); |
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|
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// n3 tap device |
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m_n3Tap = CreateObject<VirtualNetDevice> (); |
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m_n3Tap->SetAddress (Mac48Address ("11:00:01:02:03:04")); |
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m_n3Tap->SetSendCallback (MakeCallback (&Tunnel::N3VirtualSend, this)); |
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n3->AddDevice (m_n3Tap); |
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ipv4 = n3->GetObject<Ipv4> (); |
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i = ipv4->AddInterface (m_n3Tap); |
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ipv4->AddAddress (i, Ipv4InterfaceAddress (Ipv4Address ("11.0.0.254"), Ipv4Mask ("255.255.255.0"))); |
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ipv4->SetUp (i); |
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|
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} |
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|
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|
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}; |
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|
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|
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|
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int |
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main (int argc, char *argv[]) |
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{ |
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// Users may find it convenient to turn on explicit logging |
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// for selected modules; the below lines suggest how to do this |
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#if 0 |
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LogComponentEnable ("VirtualNetDeviceExample", LOG_LEVEL_INFO); |
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#endif |
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Packet::EnablePrinting (); |
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|
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|
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// Set up some default values for the simulation. Use the |
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Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (210)); |
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Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("448kb/s")); |
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|
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// Allow the user to override any of the defaults and the above |
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// Config::SetDefault ()s at run-time, via command-line arguments |
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CommandLine cmd; |
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cmd.Parse (argc, argv); |
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NS_LOG_INFO ("Create nodes."); |
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NodeContainer c; |
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c.Create (4); |
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NodeContainer n0n2 = NodeContainer (c.Get (0), c.Get (2)); |
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NodeContainer n1n2 = NodeContainer (c.Get (1), c.Get (2)); |
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NodeContainer n3n2 = NodeContainer (c.Get (3), c.Get (2)); |
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|
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InternetStackHelper internet; |
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internet.Install (c); |
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// We create the channels first without any IP addressing information |
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NS_LOG_INFO ("Create channels."); |
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PointToPointHelper p2p; |
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p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps")); |
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p2p.SetChannelAttribute ("Delay", StringValue ("2ms")); |
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NetDeviceContainer d0d2 = p2p.Install (n0n2); |
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NetDeviceContainer d1d2 = p2p.Install (n1n2); |
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p2p.SetDeviceAttribute ("DataRate", StringValue ("1500kbps")); |
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p2p.SetChannelAttribute ("Delay", StringValue ("10ms")); |
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NetDeviceContainer d3d2 = p2p.Install (n3n2); |
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// Later, we add IP addresses. |
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NS_LOG_INFO ("Assign IP Addresses."); |
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Ipv4AddressHelper ipv4; |
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ipv4.SetBase ("10.1.1.0", "255.255.255.0"); |
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Ipv4InterfaceContainer i0i2 = ipv4.Assign (d0d2); |
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ipv4.SetBase ("10.1.2.0", "255.255.255.0"); |
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Ipv4InterfaceContainer i1i2 = ipv4.Assign (d1d2); |
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ipv4.SetBase ("10.1.3.0", "255.255.255.0"); |
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Ipv4InterfaceContainer i3i2 = ipv4.Assign (d3d2); |
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|
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// Create router nodes, initialize routing database and set up the routing |
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// tables in the nodes. |
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Ipv4GlobalRoutingHelper::PopulateRoutingTables (); |
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|
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// Add the tunnels n0<=>n3 and n1<=>n3 |
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Tunnel tunnel (c.Get (3), c.Get (0), c.Get (1), |
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i3i2.GetAddress (0), i0i2.GetAddress (0), i1i2.GetAddress (0)); |
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|
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// Create the OnOff application to send UDP datagrams of size |
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// 210 bytes at a rate of 448 Kb/s |
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NS_LOG_INFO ("Create Applications."); |
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uint16_t port = 9; // Discard port (RFC 863) |
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OnOffHelper onoff ("ns3::UdpSocketFactory", |
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Address (InetSocketAddress (Ipv4Address ("11.0.0.254"), port))); |
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onoff.SetConstantRate (DataRate ("448kb/s")); |
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ApplicationContainer apps = onoff.Install (c.Get (0)); |
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apps.Start (Seconds (1.0)); |
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apps.Stop (Seconds (10.0)); |
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|
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// Create a packet sink to receive these packets |
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PacketSinkHelper sink ("ns3::UdpSocketFactory", |
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Address (InetSocketAddress (Ipv4Address::GetAny (), port))); |
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apps = sink.Install (c.Get (3)); |
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apps.Start (Seconds (1.0)); |
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//apps.Stop (Seconds (10.0)); |
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|
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// Create a similar flow from n3 to n1, starting at time 1.1 seconds |
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onoff.SetAttribute ("Remote", |
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AddressValue (InetSocketAddress (Ipv4Address ("11.0.0.1"), port))); |
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apps = onoff.Install (c.Get (3)); |
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apps.Start (Seconds (1.1)); |
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apps.Stop (Seconds (10.0)); |
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|
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// Create a packet sink to receive these packets |
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apps = sink.Install (c.Get (1)); |
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apps.Start (Seconds (1.1)); |
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//apps.Stop (Seconds (10.0)); |
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|
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AsciiTraceHelper ascii; |
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p2p.EnableAsciiAll (ascii.CreateFileStream ("virtual-net-device.tr")); |
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p2p.EnablePcapAll ("virtual-net-device"); |
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NS_LOG_INFO ("Run Simulation."); |
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Simulator::Run (); |
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Simulator::Destroy (); |
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NS_LOG_INFO ("Done."); |
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return 0; |
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} |