A Discrete-Event Network Simulator
API
fragmentation-ipv6-PMTU.cc
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1/*
2 * Copyright (c) 2008-2009 Strasbourg University
3 * Copyright (c) 2013 Universita' di Firenze
4 * Copyright (c) 2022 Jadavpur University
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation;
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * Author: David Gross <gdavid.devel@gmail.com>
20 * Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
21 * Modified by Akash Mondal <a98mondal@gmail.com>
22 */
23
24// Network topology
25// //
26// // Src n0 r1 n1 r2 n2
27// // | _ | _ |
28// // =========|_|============|_|=========
29// // MTU 5000 2000 1500
30// //
31// // - Tracing of queues and packet receptions to file "fragmentation-ipv6-PMTU.tr"
32
33#include "ns3/core-module.h"
34#include "ns3/csma-module.h"
35#include "ns3/internet-apps-module.h"
36#include "ns3/internet-module.h"
37#include "ns3/ipv6-routing-table-entry.h"
38#include "ns3/ipv6-static-routing-helper.h"
39#include "ns3/network-module.h"
40#include "ns3/point-to-point-module.h"
41
42#include <fstream>
43
44using namespace ns3;
45
46NS_LOG_COMPONENT_DEFINE("FragmentationIpv6PmtuExample");
47
48int
49main(int argc, char** argv)
50{
51 bool verbose = false;
52
53 CommandLine cmd(__FILE__);
54 cmd.AddValue("verbose", "turn on log components", verbose);
55 cmd.Parse(argc, argv);
56
57 if (verbose)
58 {
59 LogComponentEnable("Ipv6L3Protocol", LOG_LEVEL_ALL);
60 LogComponentEnable("Icmpv6L4Protocol", LOG_LEVEL_ALL);
61 LogComponentEnable("Ipv6StaticRouting", LOG_LEVEL_ALL);
62 LogComponentEnable("Ipv6Interface", LOG_LEVEL_ALL);
63 LogComponentEnable("Ping6Application", LOG_LEVEL_ALL);
64 }
65
66 NS_LOG_INFO("Create nodes.");
67 Ptr<Node> n0 = CreateObject<Node>();
68 Ptr<Node> r1 = CreateObject<Node>();
69 Ptr<Node> n1 = CreateObject<Node>();
70 Ptr<Node> r2 = CreateObject<Node>();
71 Ptr<Node> n2 = CreateObject<Node>();
72
73 NodeContainer net1(n0, r1);
74 NodeContainer net2(r1, n1, r2);
75 NodeContainer net3(r2, n2);
76 NodeContainer all(n0, r1, n1, r2, n2);
77
78 NS_LOG_INFO("Create IPv6 Internet Stack");
79 InternetStackHelper internetv6;
80 internetv6.Install(all);
81
82 NS_LOG_INFO("Create channels.");
84 csma.SetChannelAttribute("DataRate", DataRateValue(5000000));
85 csma.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
86 csma.SetDeviceAttribute("Mtu", UintegerValue(2000));
87 NetDeviceContainer d2 = csma.Install(net2); // CSMA Network with MTU 2000
88
89 csma.SetDeviceAttribute("Mtu", UintegerValue(5000));
90 NetDeviceContainer d1 = csma.Install(net1); // CSMA Network with MTU 5000
91
93 pointToPoint.SetDeviceAttribute("DataRate", DataRateValue(5000000));
94 pointToPoint.SetChannelAttribute("Delay", StringValue("2ms"));
95 pointToPoint.SetDeviceAttribute("Mtu", UintegerValue(1500));
96 NetDeviceContainer d3 = pointToPoint.Install(net3); // P2P Network with MTU 1500
97
98 NS_LOG_INFO("Create networks and assign IPv6 Addresses.");
100
101 ipv6.SetBase(Ipv6Address("2001:1::"), Ipv6Prefix(64));
102 Ipv6InterfaceContainer i1 = ipv6.Assign(d1);
103 i1.SetForwarding(1, true);
105
106 ipv6.SetBase(Ipv6Address("2001:2::"), Ipv6Prefix(64));
107 Ipv6InterfaceContainer i2 = ipv6.Assign(d2);
108 i2.SetForwarding(0, true);
110 i2.SetForwarding(1, true);
112 i2.SetForwarding(2, true);
114
115 ipv6.SetBase(Ipv6Address("2001:3::"), Ipv6Prefix(64));
116 Ipv6InterfaceContainer i3 = ipv6.Assign(d3);
117 i3.SetForwarding(0, true);
119
120 Ipv6StaticRoutingHelper routingHelper;
121 Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper>(&std::cout);
122 routingHelper.PrintRoutingTableAt(Seconds(0), r1, routingStream);
123
124 /* Create a Ping6 application to send ICMPv6 echo request from r to n2 */
125 uint32_t packetSize = 1600; // Packet should fragment as intermediate link MTU is 1500
126 uint32_t maxPacketCount = 5;
127 Time interPacketInterval = Seconds(1.0);
128 Ping6Helper ping6;
129
130 ping6.SetLocal(i2.GetAddress(1, 1));
131 ping6.SetRemote(i3.GetAddress(1, 1));
132
133 ping6.SetAttribute("MaxPackets", UintegerValue(maxPacketCount));
134 ping6.SetAttribute("Interval", TimeValue(interPacketInterval));
135 ping6.SetAttribute("PacketSize", UintegerValue(packetSize));
136 ApplicationContainer apps = ping6.Install(n1);
137 apps.Start(Seconds(2.0));
138 apps.Stop(Seconds(10.0));
139
140 /* Create a Ping6 application to send ICMPv6 echo request from n0 to n2 */
141 packetSize = 4000;
142 ping6.SetAttribute("PacketSize", UintegerValue(packetSize));
143
144 ping6.SetLocal(i1.GetAddress(0, 1));
145 ping6.SetRemote(i3.GetAddress(1, 1));
146 apps = ping6.Install(n0);
147 apps.Start(Seconds(11.0));
148 apps.Stop(Seconds(20.0));
149
150 AsciiTraceHelper ascii;
151 csma.EnableAsciiAll(ascii.CreateFileStream("fragmentation-ipv6-PMTU.tr"));
152 csma.EnablePcapAll(std::string("fragmentation-ipv6-PMTU"), true);
153 pointToPoint.EnablePcapAll(std::string("fragmentation-ipv6-PMTU"), true);
154
155 NS_LOG_INFO("Run Simulation.");
156 Simulator::Run();
157 Simulator::Destroy();
158 NS_LOG_INFO("Done.");
159
160 return 0;
161}
holds a vector of ns3::Application pointers.
void Start(Time start)
Arrange for all of the Applications in this container to Start() at the Time given as a parameter.
void Stop(Time stop)
Arrange for all of the Applications in this container to Stop() at the Time given as a parameter.
Manage ASCII trace files for device models.
Definition: trace-helper.h:173
Ptr< OutputStreamWrapper > CreateFileStream(std::string filename, std::ios::openmode filemode=std::ios::out)
Create and initialize an output stream object we'll use to write the traced bits.
Parse command-line arguments.
Definition: command-line.h:232
build a set of CsmaNetDevice objects
Definition: csma-helper.h:48
AttributeValue implementation for DataRate.
aggregate IP/TCP/UDP functionality to existing Nodes.
void Install(std::string nodeName) const
Aggregate implementations of the ns3::Ipv4, ns3::Ipv6, ns3::Udp, and ns3::Tcp classes onto the provid...
Helper class to auto-assign global IPv6 unicast addresses.
void SetBase(Ipv6Address network, Ipv6Prefix prefix, Ipv6Address base=Ipv6Address("::1"))
Set the base network number, network prefix, and base interface ID.
Ipv6InterfaceContainer Assign(const NetDeviceContainer &c)
Allocate an Ipv6InterfaceContainer with auto-assigned addresses.
Describes an IPv6 address.
Definition: ipv6-address.h:50
Keep track of a set of IPv6 interfaces.
void SetForwarding(uint32_t i, bool state)
Set the state of the stack (act as a router or as an host) for the specified index.
void SetDefaultRouteInAllNodes(uint32_t router)
Set the default route for all the devices (except the router itself).
Ipv6Address GetAddress(uint32_t i, uint32_t j) const
Get the address for the specified index.
Describes an IPv6 prefix.
Definition: ipv6-address.h:456
static void PrintRoutingTableAt(Time printTime, Ptr< Node > node, Ptr< OutputStreamWrapper > stream, Time::Unit unit=Time::S)
prints the routing tables of a node at a particular time.
Helper class that adds ns3::Ipv6StaticRouting objects.
holds a vector of ns3::NetDevice pointers
keep track of a set of node pointers.
Ping6 application helper.
Definition: ping6-helper.h:38
void SetRemote(Ipv6Address ip)
Set the remote IPv6 address.
Definition: ping6-helper.cc:41
ApplicationContainer Install(NodeContainer c)
Install the application in Nodes.
Definition: ping6-helper.cc:53
void SetAttribute(std::string name, const AttributeValue &value)
Set some attributes.
Definition: ping6-helper.cc:47
void SetLocal(Ipv6Address ip)
Set the local IPv6 address.
Definition: ping6-helper.cc:35
Build a set of PointToPointNetDevice objects.
Hold variables of type string.
Definition: string.h:42
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:105
AttributeValue implementation for Time.
Definition: nstime.h:1425
Hold an unsigned integer type.
Definition: uinteger.h:45
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:202
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
Definition: log.h:275
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1338
Time MilliSeconds(uint64_t value)
Construct a Time in the indicated unit.
Definition: nstime.h:1350
pointToPoint
Definition: first.py:31
Every class exported by the ns3 library is enclosed in the ns3 namespace.
@ LOG_LEVEL_ALL
Print everything.
Definition: log.h:116
void LogComponentEnable(const char *name, enum LogLevel level)
Enable the logging output associated with that log component.
Definition: log.cc:358
csma
Definition: second.py:56
cmd
Definition: second.py:33
bool verbose
static const uint32_t packetSize
Packet size generated at the AP.