ns-3学习手记15_ns3中使用Trace Sourse 和Trace Sink输出数据

1 举例说明

（1）其中注意点：
Config path要找对：

oss<<"/NodeList/"<<wifiStaNodes.Get(nWifi-1)->GetId()<<"/$ns3::MobilityModel/CourseChange";

（2）如何确定Trace Sources
官网链接查看：https://www.nsnam.org/doxygen/_trace_source_list.html

（3）如何确定Trace Sink

A，在已有程序中找参照的，进行修改，例如mythird中的，可以参考mixed-wired-wireless.cc
B，其他方法：
① 先把返回值设为void
②参数列表类型就是Trace Sourse的变量类型，根据（2）中提供的方法，找到对应的Trace Sourse，查看其类型，即可。

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/** This program is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License version 2 as* published by the Free Software Foundation;** This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the* GNU General Public License for more details.** You should have received a copy of the GNU General Public License* along with this program; if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#include "ns3/core-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/network-module.h"
#include "ns3/applications-module.h"
#include "ns3/wifi-module.h"
#include "ns3/mobility-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-module.h"// Default Network Topology
//
//   Wifi 10.1.3.0
//                 AP
//  *    *    *    *
//  |    |    |    |    10.1.1.0
// n5   n6   n7   n0 -------------- n1   n2   n3   n4
//                   point-to-point  |    |    |    |
//                                   ================
//                                     LAN 10.1.2.0using namespace ns3;using namespace std;NS_LOG_COMPONENT_DEFINE ("ThirdScriptExample");void CourseChange(string context, Ptr<const MobilityModel> model)
{Vector position = model->GetPosition();NS_LOG_UNCOND(context<<" x = "<<position.x<<" y = "<< position.y);}int
main (int argc, char *argv[])
{bool verbose = true;uint32_t nCsma = 3;uint32_t nWifi = 3;bool tracing = false;CommandLine cmd;cmd.AddValue ("nCsma", "Number of \"extra\" CSMA nodes/devices", nCsma);cmd.AddValue ("nWifi", "Number of wifi STA devices", nWifi);cmd.AddValue ("verbose", "Tell echo applications to log if true", verbose);cmd.AddValue ("tracing", "Enable pcap tracing", tracing);cmd.Parse (argc,argv);// The underlying restriction of 18 is due to the grid position// allocator's configuration; the grid layout will exceed the// bounding box if more than 18 nodes are provided.if (nWifi > 18){std::cout << "nWifi should be 18 or less; otherwise grid layout exceeds the bounding box" << std::endl;return 1;}if (verbose){LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);}NodeContainer p2pNodes;p2pNodes.Create (2);PointToPointHelper pointToPoint;pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));NetDeviceContainer p2pDevices;p2pDevices = pointToPoint.Install (p2pNodes);NodeContainer csmaNodes;csmaNodes.Add (p2pNodes.Get (1));csmaNodes.Create (nCsma);CsmaHelper csma;csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps"));csma.SetChannelAttribute ("Delay", TimeValue (NanoSeconds (6560)));NetDeviceContainer csmaDevices;csmaDevices = csma.Install (csmaNodes);NodeContainer wifiStaNodes;wifiStaNodes.Create (nWifi);NodeContainer wifiApNode = p2pNodes.Get (0);YansWifiChannelHelper channel = YansWifiChannelHelper::Default ();YansWifiPhyHelper phy = YansWifiPhyHelper::Default ();phy.SetChannel (channel.Create ());WifiHelper wifi;wifi.SetRemoteStationManager ("ns3::AarfWifiManager");WifiMacHelper mac;Ssid ssid = Ssid ("ns-3-ssid");mac.SetType ("ns3::StaWifiMac","Ssid", SsidValue (ssid),"ActiveProbing", BooleanValue (false));NetDeviceContainer staDevices;staDevices = wifi.Install (phy, mac, wifiStaNodes);mac.SetType ("ns3::ApWifiMac","Ssid", SsidValue (ssid));NetDeviceContainer apDevices;apDevices = wifi.Install (phy, mac, wifiApNode);MobilityHelper mobility;mobility.SetPositionAllocator ("ns3::GridPositionAllocator","MinX", DoubleValue (0.0),"MinY", DoubleValue (0.0),"DeltaX", DoubleValue (5.0),"DeltaY", DoubleValue (10.0),"GridWidth", UintegerValue (3),"LayoutType", StringValue ("RowFirst"));mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel","Bounds", RectangleValue (Rectangle (-50, 50, -50, 50)));mobility.Install (wifiStaNodes);mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");mobility.Install (wifiApNode);InternetStackHelper stack;stack.Install (csmaNodes);stack.Install (wifiApNode);stack.Install (wifiStaNodes);Ipv4AddressHelper address;address.SetBase ("10.1.1.0", "255.255.255.0");Ipv4InterfaceContainer p2pInterfaces;p2pInterfaces = address.Assign (p2pDevices);address.SetBase ("10.1.2.0", "255.255.255.0");Ipv4InterfaceContainer csmaInterfaces;csmaInterfaces = address.Assign (csmaDevices);address.SetBase ("10.1.3.0", "255.255.255.0");address.Assign (staDevices);address.Assign (apDevices);UdpEchoServerHelper echoServer (9);ApplicationContainer serverApps = echoServer.Install (csmaNodes.Get (nCsma));serverApps.Start (Seconds (1.0));serverApps.Stop (Seconds (10.0));UdpEchoClientHelper echoClient (csmaInterfaces.GetAddress (nCsma), 9);echoClient.SetAttribute ("MaxPackets", UintegerValue (1));echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.0)));echoClient.SetAttribute ("PacketSize", UintegerValue (1024));ApplicationContainer clientApps = echoClient.Install (wifiStaNodes.Get (nWifi - 1));clientApps.Start (Seconds (2.0));clientApps.Stop (Seconds (10.0));Ipv4GlobalRoutingHelper::PopulateRoutingTables ();Simulator::Stop (Seconds (10.0));if (tracing == true){pointToPoint.EnablePcapAll ("third");phy.EnablePcap ("third", apDevices.Get (0));csma.EnablePcap ("third", csmaDevices.Get (0), true);}ostringstream oss;oss<<"/NodeList/"<<wifiStaNodes.Get(nWifi-1)->GetId()<<"/$ns3::MobilityModel/CourseChange";NS_LOG_UNCOND(oss.str());Config::Connect(oss.str(),MakeCallback(&CourseChange));Simulator::Run ();Simulator::Destroy ();return 0;
}

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ns-3学习手记15_ns3中使用Trace Sourse 和Trace Sink输出数据

1 举例说明

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