本文主要是介绍NS3 的 ipv4-static-routing-test-suite 源码分析，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
下面进行源码注释：
// End-to-end tests for Ipv4 static routing#include "ns3/boolean.h"
#include "ns3/config.h"
#include "ns3/inet-socket-address.h"
#include "ns3/internet-stack-helper.h"
#include "ns3/ipv4-address-helper.h"
#include "ns3/ipv4-static-routing-helper.h"
#include "ns3/node.h"
#include "ns3/node-container.h"
#include "ns3/packet.h"
#include "ns3/pointer.h"
#include "ns3/simulator.h"
#include "ns3/string.h"
#include "ns3/test.h"
#include "ns3/uinteger.h"
#include "ns3/simple-net-device.h"
#include "ns3/simple-channel.h"
#include "ns3/simple-net-device-helper.h"
#include "ns3/socket-factory.h"
#include "ns3/udp-socket-factory.h"using namespace ns3;/*** \ingroup internet-test* \ingroup tests** \brief IPv4 StaticRouting /32 Test*/
class Ipv4StaticRoutingSlash32TestCase : public TestCase
{
public:Ipv4StaticRoutingSlash32TestCase ();virtual ~Ipv4StaticRoutingSlash32TestCase ();Ptr<Packet> m_receivedPacket; //!< Received packet/*** \brief Send data.* \param socket The sending socket.* \param to Destination address.*/void DoSendData (Ptr<Socket> socket, std::string to);/*** \brief Send data.* \param socket The sending socket.* \param to Destination address.*/void SendData (Ptr<Socket> socket, std::string to);/*** \brief Receive data.* \param socket The receiving socket.*/void ReceivePkt (Ptr<Socket> socket);private:virtual void DoRun (void);
};// Add some help text to this case to describe what it is intended to test
Ipv4StaticRoutingSlash32TestCase::Ipv4StaticRoutingSlash32TestCase (): TestCase ("Slash 32 static routing example")
{
}Ipv4StaticRoutingSlash32TestCase::~Ipv4StaticRoutingSlash32TestCase ()
{
}void
Ipv4StaticRoutingSlash32TestCase::ReceivePkt (Ptr<Socket> socket)
{uint32_t availableData;availableData = socket->GetRxAvailable ();m_receivedPacket = socket->Recv (std::numeric_limits<uint32_t>::max (), 0);NS_ASSERT (availableData == m_receivedPacket->GetSize ());//cast availableData to void, to suppress 'availableData' set but not used//compiler warning(void) availableData;
}void
Ipv4StaticRoutingSlash32TestCase::DoSendData (Ptr<Socket> socket, std::string to)
{Address realTo = InetSocketAddress (Ipv4Address (to.c_str ()), 1234);NS_TEST_EXPECT_MSG_EQ (socket->SendTo (Create<Packet> (123), 0, realTo),123, "100");
}void
Ipv4StaticRoutingSlash32TestCase::SendData (Ptr<Socket> socket, std::string to)
{m_receivedPacket = Create<Packet> ();Simulator::ScheduleWithContext (socket->GetNode ()->GetId (), Seconds (60),&Ipv4StaticRoutingSlash32TestCase::DoSendData, this, socket, to);Simulator::Stop (Seconds (66));Simulator::Run ();
}// Test program for this 3-router scenario, using static routing
//
// (a.a.a.a/32)A<--x.x.x.0/30-->B<--y.y.y.0/30-->C(c.c.c.c/32)
//
void
Ipv4StaticRoutingSlash32TestCase::DoRun (void)
{//这里创建三个节点Ptr<Node> nA = CreateObject<Node> ();Ptr<Node> nB = CreateObject<Node> ();Ptr<Node> nC = CreateObject<Node> ();// 安装协议栈NodeContainer c = NodeContainer (nA, nB, nC);InternetStackHelper internet;internet.Install (c);// 创建了2个链接// a-------------b----------------c// |1.1 1.2 | 1.5 1.6 |// 172.116.1.1/24 192.168.1.1/24NodeContainer nAnB = NodeContainer (nA, nB);NodeContainer nBnC = NodeContainer (nB, nC);// 路由器A添加一个接入的网卡Ptr<SimpleNetDevice> deviceA = CreateObject<SimpleNetDevice> ();deviceA->SetAddress (Mac48Address::Allocate ());nA->AddDevice (deviceA);// 路由器C添加一个接入网卡Ptr<SimpleNetDevice> deviceC = CreateObject<SimpleNetDevice> ();deviceC->SetAddress (Mac48Address::Allocate ());nC->AddDevice (deviceC);// 对AB和BC链路分别添加一个网间网的互联网卡SimpleNetDeviceHelper devHelper;NetDeviceContainer dAdB = devHelper.Install (nAnB);NetDeviceContainer dBdC = devHelper.Install (nBnC);// AB链路网间网地址Ipv4AddressHelper ipv4;ipv4.SetBase ("10.1.1.0", "255.255.255.252");Ipv4InterfaceContainer iAiB = ipv4.Assign (dAdB);// BC链路的网间网地址ipv4.SetBase ("10.1.1.4", "255.255.255.252");Ipv4InterfaceContainer iBiC = ipv4.Assign (dBdC);// 这里为3个路由器分别建立1个路由表，所有后面没有安装的函数，Ptr<Ipv4> ipv4A = nA->GetObject<Ipv4> ();Ptr<Ipv4> ipv4B = nB->GetObject<Ipv4> ();Ptr<Ipv4> ipv4C = nC->GetObject<Ipv4> ();// 路由表A中添加了一个接口，返回了接口的索引int32_t ifIndexA = ipv4A->AddInterface (deviceA);Ipv4InterfaceAddress ifInAddrA = Ipv4InterfaceAddress (Ipv4Address ("172.16.1.1"), Ipv4Mask ("/32"));ipv4A->AddAddress (ifIndexA, ifInAddrA); // 路由表内，将接口和地址绑为一项ipv4A->SetMetric (ifIndexA, 1); // 到该端口是几跳ipv4A->SetUp (ifIndexA); // 将端口设置为UP状态// 路由表C中添加了一个接口，返回了接口的索引int32_t ifIndexC = ipv4C->AddInterface (deviceC);Ipv4InterfaceAddress ifInAddrC = Ipv4InterfaceAddress (Ipv4Address ("192.168.1.1"), Ipv4Mask ("/32"));ipv4C->AddAddress (ifIndexC, ifInAddrC);ipv4C->SetMetric (ifIndexC, 1);ipv4C->SetUp (ifIndexC);// 静态路由Ipv4StaticRoutingHelper ipv4RoutingHelper;// 从A到CPtr<Ipv4StaticRouting> staticRoutingA = ipv4RoutingHelper.GetStaticRouting (ipv4A);// The ifIndex 是 1; the first p2p link added// 到C的接入网段地址，需要发送到P2P的AB网间网的B口！！staticRoutingA->AddHostRouteTo (Ipv4Address ("192.168.1.1"), Ipv4Address ("10.1.1.2"), 1);// 同样需要在路由器B上设置相关路由Ptr<Ipv4StaticRouting> staticRoutingB = ipv4RoutingHelper.GetStaticRouting (ipv4B);// The ifIndex on 路由器 B 是 2; 0 是 loopback地址, 1 是AB链路的接口// 到C的接入网段地址，需要发送到P2P的BC网间网的C口！！staticRoutingB->AddHostRouteTo (Ipv4Address ("192.168.1.1"), Ipv4Address ("10.1.1.6"), 2);// 创建发送UDP数据包的测试Ptr<SocketFactory> rxSocketFactory = nC->GetObject<UdpSocketFactory> ();Ptr<Socket> rxSocket = rxSocketFactory->CreateSocket ();NS_TEST_EXPECT_MSG_EQ (rxSocket->Bind (InetSocketAddress (Ipv4Address ("192.168.1.1"), 1234)), 0, "trivial");rxSocket->SetRecvCallback (MakeCallback (&Ipv4StaticRoutingSlash32TestCase::ReceivePkt, this));Ptr<SocketFactory> txSocketFactory = nA->GetObject<UdpSocketFactory> ();Ptr<Socket> txSocket = txSocketFactory->CreateSocket ();txSocket->SetAllowBroadcast (true);// ------ Now the tests ------------// Unicast testSendData (txSocket, "192.168.1.1");NS_TEST_EXPECT_MSG_EQ (m_receivedPacket->GetSize (), 123, "Static routing with /32 did not deliver all packets.");Simulator::Destroy ();
}/*** \ingroup internet-test* \ingroup tests** \brief IPv4 StaticRouting /32 TestSuite*/
class Ipv4StaticRoutingTestSuite : public TestSuite
{
public:Ipv4StaticRoutingTestSuite ();
};Ipv4StaticRoutingTestSuite::Ipv4StaticRoutingTestSuite (): TestSuite ("ipv4-static-routing", UNIT)
{AddTestCase (new Ipv4StaticRoutingSlash32TestCase, TestCase::QUICK);
}static Ipv4StaticRoutingTestSuite ipv4StaticRoutingTestSuite; //!< Static variable for test initialization
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