A Discrete-Event Network Simulator
API
nix-simple-multi-address.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2021 NITK Surathkal
4  *
5  * This program is free software; you can redistribute it and/or modify
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7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
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14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Ameya Deshpande <ameyanrd@outlook.com>
19  *
20  */
21 
22 #include "ns3/core-module.h"
23 #include "ns3/network-module.h"
24 #include "ns3/internet-module.h"
25 #include "ns3/point-to-point-module.h"
26 #include "ns3/applications-module.h"
27 #include "ns3/ipv4-static-routing-helper.h"
28 #include "ns3/ipv4-list-routing-helper.h"
29 #include "ns3/ipv4-nix-vector-helper.h"
30 
133 using namespace ns3;
134 
135 NS_LOG_COMPONENT_DEFINE ("NixSimpleExample");
136 
137 int
138 main (int argc, char *argv[])
139 {
140  CommandLine cmd (__FILE__);
141  cmd.Parse (argc, argv);
142 
143  LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);
144  LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);
145 
146  NodeContainer nodes12;
147  nodes12.Create (2);
148 
149  NodeContainer nodes23;
150  nodes23.Add (nodes12.Get (1));
151  nodes23.Create (1);
152 
153  NodeContainer nodes34;
154  nodes34.Add (nodes23.Get (1));
155  nodes34.Create (1);
156 
158  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
159  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));
160 
161  NodeContainer allNodes = NodeContainer (nodes12, nodes23.Get (1), nodes34.Get (1));
162 
163  // NixHelper to install nix-vector routing
164  // on all nodes
165  Ipv4NixVectorHelper nixRouting;
167  stack.SetRoutingHelper (nixRouting); // has effect on the next Install ()
168  stack.Install (allNodes);
169 
170  NetDeviceContainer devices12;
171  NetDeviceContainer devices23;
172  NetDeviceContainer devices34;
173  devices12 = pointToPoint.Install (nodes12);
174  devices23 = pointToPoint.Install (nodes23);
175  devices34 = pointToPoint.Install (nodes34);
176 
177  Ipv4AddressHelper address1;
178  address1.SetBase ("10.1.1.0", "255.255.255.0");
179  Ipv4AddressHelper address2;
180  address2.SetBase ("10.1.2.0", "255.255.255.0");
181  Ipv4AddressHelper address3;
182  address3.SetBase ("10.1.3.0", "255.255.255.0");
183  Ipv4AddressHelper address4;
184  address4.SetBase ("10.2.1.0", "255.255.255.0");
185  Ipv4AddressHelper address5;
186  address5.SetBase ("10.2.3.0", "255.255.255.0");
187 
188  address1.Assign (devices12);
189  address2.Assign (devices23);
190  Ipv4InterfaceContainer interfaces34 = address3.Assign (devices34);
191  Ipv4InterfaceContainer interfaces12 = address4.Assign (devices12);
192 
194 
195  ApplicationContainer serverApps = echoServer.Install (nodes34.Get (1));
196  serverApps.Start (Seconds (1.0));
197  serverApps.Stop (Seconds (10.0));
198 
199  // Set the destination address as 10.1.3.2
200  UdpEchoClientHelper echoClient (interfaces34.GetAddress (1), 9);
201  echoClient.SetAttribute ("MaxPackets", UintegerValue (1));
202  echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.)));
203  echoClient.SetAttribute ("PacketSize", UintegerValue (1024));
204 
205  ApplicationContainer clientApps = echoClient.Install (nodes12.Get (0));
206  clientApps.Start (Seconds (2.0));
207  clientApps.Stop (Seconds (10.0));
208 
209  // Trace routing paths for different source and destinations.
210  Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper> ("nix-simple-multi-address.routes", std::ios::out);
211  // Check the path from n0 to n1 (10.1.3.2).
212  nixRouting.PrintRoutingPathAt (Seconds (3), nodes12.Get (0), interfaces12.GetAddress (1, 1), routingStream);
213  // Trace routing tables.
214  nixRouting.PrintRoutingTableAllAt (Seconds (4), routingStream);
215  // Assign address5 addresses to n2 and n3.
216  // n2 gets 10.2.3.1 and n3 gets 10.2.3.2 on the same interface.
217  Simulator::Schedule(Seconds (5), &Ipv4AddressHelper::Assign, &address5, devices34);
218 
219  // Trace routing tables.
220  // Notice that NixCache and Ipv4RouteCache becomes empty for each node.
221  // This happens because new addresses are added at t = +5s, due to which
222  // existing caches get flushed.
223  nixRouting.PrintRoutingTableAllAt (Seconds (6), routingStream);
224 
225  // Check the path from n0 to n3 (10.2.3.2).
226  nixRouting.PrintRoutingPathAt (Seconds (7), nodes12.Get (0), Ipv4Address ("10.2.3.2"), routingStream);
227 
228  Simulator::Run ();
230  return 0;
231 }
holds a vector of ns3::Application pointers.
static EventId Schedule(Time const &delay, FUNC f, Ts &&... args)
Schedule an event to expire after delay.
Definition: simulator.h:557
holds a vector of std::pair of Ptr<Ipv4> and interface index.
Hold variables of type string.
Definition: string.h:41
serverApps
Definition: first.py:52
Create an application which sends a UDP packet and waits for an echo of this packet.
static void Run(void)
Run the simulation.
Definition: simulator.cc:172
echoServer
Definition: first.py:50
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
Helper class that adds Nix-vector routing to nodes.
aggregate IP/TCP/UDP functionality to existing Nodes.
cmd
Definition: second.py:35
Build a set of PointToPointNetDevice objects.
stack
Definition: first.py:41
Create a server application which waits for input UDP packets and sends them back to the original sen...
void LogComponentEnable(char const *name, enum LogLevel level)
Enable the logging output associated with that log component.
Definition: log.cc:361
AttributeValue implementation for Time.
Definition: nstime.h:1353
Ipv4Address GetAddress(uint32_t i, uint32_t j=0) const
echoClient
Definition: first.py:56
Hold an unsigned integer type.
Definition: uinteger.h:44
pointToPoint
Definition: first.py:35
LOG_INFO and above.
Definition: log.h:107
holds a vector of ns3::NetDevice pointers
Parse command-line arguments.
Definition: command-line.h:227
static void Destroy(void)
Execute the events scheduled with ScheduleDestroy().
Definition: simulator.cc:136
Every class exported by the ns3 library is enclosed in the ns3 namespace.
keep track of a set of node pointers.
Ipv4 addresses are stored in host order in this class.
Definition: ipv4-address.h:41
Ipv4InterfaceContainer Assign(const NetDeviceContainer &c)
Assign IP addresses to the net devices specified in the container based on the current network prefix...
void Add(NodeContainer other)
Append the contents of another NodeContainer to the end of this container.
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1289
Ptr< Node > Get(uint32_t i) const
Get the Ptr<Node> stored in this container at a given index.
clientApps
Definition: first.py:61
A helper class to make life easier while doing simple IPv4 address assignment in scripts.
void Create(uint32_t n)
Create n nodes and append pointers to them to the end of this NodeContainer.
void SetBase(Ipv4Address network, Ipv4Mask mask, Ipv4Address base="0.0.0.1")
Set the base network number, network mask and base address.