NS3的两个例子

/ -- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -- / //Emacs模式行，GPL boilerplate



#include "ns3/core-module.h" //

#include "ns3/simulator-module.h"

#include "ns3/node-module.h"

#include "ns3/helper-module.h"



// Default Network Topology

//

// 10.1.1.0

// n0 -------------- n1 n2 n3 n4

// point-to-point | | | |

// ================

// LAN 10.1.2.0





using namespace ns3;



NS_LOG_COMPONENT_DEFINE ("SecondScriptExample");



int

main (int argc, char argv[])

{

bool verbose = true; //定义变量，用于决定是否开启两个UdpApplication的Logging组件;默认true开启

uint32_t nCsma = 3; //LAN中另有3个node



CommandLine cmd;

cmd.AddValue ("nCsma", "Number of \"extra\" CSMA nodes/devices", nCsma);

cmd.AddValue ("verbose", "Tell echo applications to log if true", verbose); //命令行参数设置是否开启logging



cmd.Parse (argc,argv);



if (verbose)

{

LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_INFO);

LogComponentEnable("UdpEchoServerApplication", LOG_LEVEL_INFO);

}



nCsma = nCsma == 0 ? 1 : nCsma; //三目运算符还可以这样写。。。。



/***网络拓扑部分***/

//创建使用P2P链路链接的2个node

NodeContainer p2pNodes;

p2pNodes.Create (2);



//创建另一个NodeContainer类对象，用于总线(CSMA)网络

NodeContainer csmaNodes;

csmaNodes.Add (p2pNodes.Get (1)); //将之前P2P的NodeContianer的第二个节点(索引1)添加到CSMA的NodeContainer，以获得CSMA device;这个node将会有两个device

csmaNodes.Create (nCsma); //再创建Bus network上另外的node



//设置传送速率和信道延迟，同first.cc

PointToPointHelper pointToPoint; //注意使用Helper的固定格式：

//1/helper对象声明及属性设置;

//2/devices对象声明及接收helper对象安装方法的返回列表，安装方法的参数为节点对象！

pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));

pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));



//安装P2P网卡设备到P2P网络节点，同first.cc

NetDeviceContainer p2pDevices;

p2pDevices = pointToPoint.Install (p2pNodes);



//类似于P2PHelper，CsmaHelper帮助创建和连接CSMA设备及信道

CsmaHelper csma;

csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps")); //数据率由channel属性指定，而非Device属性;

//因为CSMA不允许同一信道上有多个不同数据率的设备！

csma.SetChannelAttribute ("Delay", TimeValue (NanoSeconds (6560))); //speed-of-light delay???



NetDeviceContainer csmaDevices;

csmaDevices = csma.Install (csmaNodes);



//安装网络协议

InternetStackHelper stack;

stack.Install (p2pNodes.Get (0)); //P2P链路中的第一个节点

stack.Install (csmaNodes); //P2P链路中的第二个节点包含在csmaNodes中



Ipv4AddressHelper address; //两个网段的IP地址类对象

address.SetBase ("10.1.1.0", "255.255.255.0"); //安排P2P网段的地址

Ipv4InterfaceContainer p2pInterfaces;

p2pInterfaces = address.Assign (p2pDevices);



address.SetBase ("10.1.2.0", "255.255.255.0"); //安排CSMA网段地址

Ipv4InterfaceContainer csmaInterfaces;

csmaInterfaces = address.Assign (csmaDevices);

/***网络拓扑部分结束***/



/****应用程序部分***/

UdpEchoServerHelper echoServer (9);



ApplicationContainer serverApps = echoServer.Install (csmaNodes.Get (nCsma)); //将Server服务安装在CSMA网段的最后一个节点上，nCsma是可变的，所以不能用3

serverApps.Start (Seconds (1.0));

serverApps.Stop (Seconds (10.0));



UdpEchoClientHelper echoClient (csmaInterfaces.GetAddress (nCsma), 9); //同first.cc

echoClient.SetAttribute ("MaxPackets", UintegerValue (1));

echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.)));

echoClient.SetAttribute ("PacketSize", UintegerValue (1024));



ApplicationContainer clientApps = echoClient.Install (p2pNodes.Get (0)); //同first.cc

clientApps.Start (Seconds (2.0));

clientApps.Stop (Seconds (10.0));

/****应用程序部分结束***/



/**调用全局路由Helper帮助建立网络路由***/

Ipv4GlobalRoutingHelper::PopulateRoutingTables (); //全局路由管理器根据节点产生的链路通告为每个节点建立路由表



/**开启pcap跟踪***/

//pointToPoint.EnablePcapAll ("second"); //开启P2PHelper类对象的pcap;"second"为保存文件的前缀名，两句的名称相同了？？？

//前缀后的节点号是<!全局节点号!>，不用担心名称相同！

//csma.EnablePcap ("second", csmaDevices.Get (1), true); //开启csmaHelper类对象的pcap

//使用csma网段索引为1的设备(第二个)进行sniff，True开启Promiscuous mode

//NodeContainer类对象的Get方法用于获得容器中给定索引下的节点，返回指向请求节点的指针！

//Node类对象的GetId返回节点的全局ID(即节点列表中的索引号)？？？？？？？

//注意之前使用的Get是NetDevice类的方法，以下使用的是Node类的方法！！

//NetDevice不用取得ID，可以直接使用(已验证);但Node需要进一步查找ID!!（已验证，不使用GetId无法通过）

//所以后边的两句和这样的两句是等效的(已验证)

// “csma.EnablePcap ("second", csmaDevices.Get (nCsma), 0);”

// “csma.EnablePcap ("second", csmaDevices.Get (nCsma-1), 0);”

pointToPoint.EnablePcap ("second", p2pNodes.Get (0)->GetId (), 0);

//最后一项为explicitFilename，默认false，不加也可;若true，将prefix作为文件名

//倒数第二项promiscuous，默认false，此处仅想跟踪一个设备，故设为0(false);当有一个节点和设备的promiscuous模式设为true时，CSMA网段其它节点便不再产生trace文件。

csma.EnablePcap ("second", csmaNodes.Get (nCsma)->GetId (), 0, false);

csma.EnablePcap ("second", csmaNodes.Get (nCsma-1)->GetId (), 0, false);



Simulator::Run ();

Simulator::Destroy ();

return 0;

}

2、加入wifi网络

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1. / -- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -- /
2. /
3. This program is free software; you can redistribute it and/or modify
4. it under the terms of the GNU General Public License version 2 as
5. published by the Free Software Foundation;
6.
7. This program is distributed in the hope that it will be useful,
8. but WITHOUT ANY WARRANTY; without even the implied warranty of
9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10. GNU General Public License for more details.
11.
12. You should have received a copy of the GNU General Public License
13. along with this program; if not, write to the Free Software
14. Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15. /
16. #include "ns3/core-module.h"
17. #include "ns3/simulator-module.h"
18. #include "ns3/node-module.h"
19. #include "ns3/helper-module.h"
20. #include "ns3/wifi-module.h"
21. #include "ns3/mobility-module.h"
22. // Default Network Topology
23. //
24. // Wifi 10.1.3.0
25. // AP
26. // * *
27. // | | | | 10.1.1.0
28. // n5 n6 n7 n0 -------------- n1 n2 n3 n4
29. // point-to-point | | | |
30. // ================
31. // LAN 10.1.2.0
32. usingnamespacens3;
33. NS_LOG_COMPONENT_DEFINE ("ThirdScriptExample");
34. int
35. main (intargc,char*argv[])
36. {
37. boolverbose =true;
38. uint32_t nCsma = 3;
39. uint32_t nWifi = 3;
40. CommandLine cmd;
41. cmd.AddValue ("nCsma","Number of \"extra\" CSMA nodes/devices", nCsma);
42. cmd.AddValue ("nWifi","Number of wifi STA devices", nWifi);
43. cmd.AddValue ("verbose","Tell echo applications to log if true", verbose);
44. cmd.Parse (argc,argv);
45. if(verbose)
46. {
47. LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_INFO);
48. LogComponentEnable("UdpEchoServerApplication", LOG_LEVEL_INFO);
49. }
50. NodeContainer p2pNodes;
51. p2pNodes.Create (2);
52. PointToPointHelper pointToPoint;
53. pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
54. pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));
55. NetDeviceContainer p2pDevices;
56. p2pDevices = pointToPoint.Install (p2pNodes);
57. NodeContainer csmaNodes;
58. csmaNodes.Add (p2pNodes.Get (1));
59. csmaNodes.Create (nCsma);
60. CsmaHelper csma;
61. csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps"));
62. csma.SetChannelAttribute ("Delay", TimeValue (NanoSeconds (6560)));
63. NetDeviceContainer csmaDevices;
64. csmaDevices = csma.Install (csmaNodes);
65. NodeContainer wifiStaNodes;
66. wifiStaNodes.Create (nWifi);
67. NodeContainer wifiApNode = p2pNodes.Get (0);
68. YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();
69. YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();
70. phy.SetChannel (channel.Create ());
71. WifiHelper wifi = WifiHelper::Default ();
72. wifi.SetRemoteStationManager ("ns3::AarfWifiManager");
73. NqosWifiMacHelper mac = NqosWifiMacHelper::Default ();
74.
75. Ssid ssid = Ssid ("ns-3-ssid");
76. mac.SetType ("ns3::NqstaWifiMac",
77. "Ssid", SsidValue (ssid),
78. "ActiveProbing", BooleanValue (false));
79. NetDeviceContainer staDevices;
80. staDevices = wifi.Install (phy, mac, wifiStaNodes);
81. mac.SetType ("ns3::NqapWifiMac",
82. "Ssid", SsidValue (ssid));
83. NetDeviceContainer apDevices;
84. apDevices = wifi.Install (phy, mac, wifiApNode);
85. MobilityHelper mobility;
86. mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
87. "MinX", DoubleValue (0.0),
88. "MinY", DoubleValue (0.0),
89. "DeltaX", DoubleValue (5.0),
90. "DeltaY", DoubleValue (10.0),
91. "GridWidth", UintegerValue (3),
92. "LayoutType", StringValue ("RowFirst"));
93. mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",
94. "Bounds", RectangleValue (Rectangle (-50, 50, -50, 50)));
95. mobility.Install (wifiStaNodes);
96. mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
97. mobility.Install (wifiApNode);
98. InternetStackHelper stack;
99. stack.Install (csmaNodes);
100. stack.Install (wifiApNode);
101. stack.Install (wifiStaNodes);
102. Ipv4AddressHelper address;
103. address.SetBase ("10.1.1.0","255.255.255.0");
104. Ipv4InterfaceContainer p2pInterfaces;
105. p2pInterfaces = address.Assign (p2pDevices);
106. address.SetBase ("10.1.2.0","255.255.255.0");
107. Ipv4InterfaceContainer csmaInterfaces;
108. csmaInterfaces = address.Assign (csmaDevices);
109. address.SetBase ("10.1.3.0","255.255.255.0");
110. address.Assign (staDevices);
111. address.Assign (apDevices);
112. UdpEchoServerHelper echoServer (9);
113. ApplicationContainer serverApps = echoServer.Install (csmaNodes.Get (nCsma));
114. serverApps.Start (Seconds (1.0));
115. serverApps.Stop (Seconds (10.0));
116. UdpEchoClientHelper echoClient (csmaInterfaces.GetAddress (nCsma), 9);
117. echoClient.SetAttribute ("MaxPackets", UintegerValue (1));
118. echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.)));
119. echoClient.SetAttribute ("PacketSize", UintegerValue (1024));
120. ApplicationContainer clientApps =
121. echoClient.Install (wifiStaNodes.Get (nWifi - 1));
122. clientApps.Start (Seconds (2.0));
123. clientApps.Stop (Seconds (10.0));
124. Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
125. Simulator::Stop (Seconds (10.0));
126. pointToPoint.EnablePcapAll ("third");
127. phy.EnablePcap ("third", apDevices.Get (0));
128. csma.EnablePcap ("third", csmaDevices.Get (0),true);
129. Simulator::Run ();
130. Simulator::Destroy ();
131. return0;
132. }

原文链接: https://www.cnblogs.com/lovemo1314/archive/2011/02/22/1961424.html

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