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internet: Add Tests for GlobalRouteManagerImpl testsuite

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This commit is contained in:
shashwat
2025-06-10 14:32:28 +05:30
committed by Tommaso Pecorella
parent 0984797a75
commit d1134f2b43
1 changed files with 785 additions and 47 deletions
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832
src/internet/test/global-route-manager-impl-test-suite.cc
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@@ -6,19 +6,53 @@
*
* Authors: Tom Henderson (tomhend@u.washington.edu)
*
* Modified By: Shashwat Patni (shashwatpatni25@gmail.com)
*
* Kunihiro Ishigura, Toshiaki Takada (GNU Zebra) are attributed authors
* of the quagga 0.99.7/src/ospfd/ospf_spf.c code which was ported here
*/
#include "ns3/candidate-queue.h"
#include "ns3/config.h"
#include "ns3/global-route-manager-impl.h"
#include "ns3/internet-module.h"
#include "ns3/internet-stack-helper.h"
#include "ns3/ipv4-global-routing-helper.h"
#include "ns3/ipv4-global-routing.h"
#include "ns3/network-module.h"
#include "ns3/node-container.h"
#include "ns3/rng-seed-manager.h"
#include "ns3/simple-net-device-helper.h"
#include "ns3/simulator.h"
#include "ns3/test.h"
#include <cstdlib> // for rand()
using namespace ns3;
NS_LOG_COMPONENT_DEFINE("GlobalRouteManagerImplTestSuite");
//
// This test suite is designed to check the Working of the GlobalRouteManagerImpl
// For that reason, the tests in this suite manually build LSAs for each topology
// we manually call DebugSPFCalculate() to fill routing tables of the node we are interested in.
//
// TestCase 1: LinkRoutesTestCase
// This test case tests that:
// - GLobalRouteManagerLSDB stores the LSAs with key as the correct link state ID
// - GlobalRouteManagerImpl checks for stubnodes and computes default routes for them
// - HostRoutes are computed correctly for point-to-point links
//
// TestCase 2: LanRoutesTestCase
// This test case tests that:
// - Network LSAs are handled by the GlobalRouteManagerImpl
// - GlobalRouteManagerImpl computes the routes correctly for a LAN topology
//
// TestCase 3: RandomEcmpRoutesTestCase
// This test case tests that:
// - GlobalRouteManagerImpl computes ECMP routes correctly.
// - Those random routes are in fact used by the GlobalRouting protocol
//
/**
* @ingroup internet
* @ingroup tests
@@ -30,39 +64,60 @@ using namespace ns3;
*
* @brief Global Route Manager Test
*/
class GlobalRouteManagerImplTestCase : public TestCase
class LinkRoutesTestCase : public TestCase
{
public:
GlobalRouteManagerImplTestCase();
LinkRoutesTestCase();
void DoSetup() override;
void DoRun() override;
private:
/**
*@brief Builds the LSAs for the topology. These LSAs are manually created and inserted into the
* GlobalRouteManagerLSDB.Each node exports a router LSA.
*/
void BuildLsa();
/**
* @brief Checks the Routing Table Entries for the expected output.
* @param globalroutingprotocol The routing protocol for the node whose routing table is to be
* checked.
* @param dests The expected destinations.
* @param gws The expected gateways.
*/
void CheckRoutes(Ptr<Ipv4GlobalRouting>& globalroutingprotocol,
std::vector<Ipv4Address>& dests,
std::vector<Ipv4Address>& gws);
NodeContainer nodes; //!< NodeContainer to hold the nodes in the topology
std::vector<GlobalRoutingLSA*> m_lsas; //!< The LSAs for the topology
};
GlobalRouteManagerImplTestCase::GlobalRouteManagerImplTestCase()
: TestCase("GlobalRouteManagerImplTestCase")
LinkRoutesTestCase::LinkRoutesTestCase()
: TestCase("LinkRoutesTestCase")
{
}
void
GlobalRouteManagerImplTestCase::DoRun()
LinkRoutesTestCase::CheckRoutes(Ptr<Ipv4GlobalRouting>& globalroutingprotocol,
std::vector<Ipv4Address>& dests,
std::vector<Ipv4Address>& gws)
{
CandidateQueue candidate;
for (int i = 0; i < 100; ++i)
// check each individual Routing Table Entry for its destination and gateway
for (uint32_t i = 0; i < globalroutingprotocol->GetNRoutes(); i++)
{
auto v = new SPFVertex;
v->SetDistanceFromRoot(std::rand() % 100);
candidate.Push(v);
Ipv4RoutingTableEntry* route = globalroutingprotocol->GetRoute(i);
NS_LOG_DEBUG("dest " << route->GetDest() << " gw " << route->GetGateway());
NS_TEST_ASSERT_MSG_EQ(route->GetDest(), dests[i], "Error-- wrong destination");
NS_TEST_ASSERT_MSG_EQ(route->GetGateway(), gws[i], "Error-- wrong gateway");
}
}
for (int i = 0; i < 100; ++i)
{
SPFVertex* v = candidate.Pop();
delete v;
v = nullptr;
}
// Build fake link state database; four routers (0-3), 3 point-to-point
// links
void
LinkRoutesTestCase::DoSetup()
{
// Simple p2p links. n0,n1 and n3 are stub nodes
//
//
// n0
// \ link 0
@@ -72,18 +127,56 @@ GlobalRouteManagerImplTestCase::DoRun()
// / link 1
// n1
//
// link0: 10.1.1.1/30, 10.1.1.2/30
// link1: 10.1.2.1/30, 10.1.2.2/30
// link2: 10.1.3.1/30, 10.1.3.2/30
// link0: n0->10.1.1.1/30, n2-> 10.1.1.2/30
// link1: n1-> 10.1.2.1/30, n2->10.1.2.2/30
// link2: n2->10.1.3.1/30, n3-> 10.1.3.2/30
//
//
//
nodes.Create(4);
Ipv4GlobalRoutingHelper globalhelper;
InternetStackHelper stack;
stack.SetRoutingHelper(globalhelper);
stack.Install(nodes);
SimpleNetDeviceHelper devHelper;
devHelper.SetNetDevicePointToPointMode(true);
Ptr<SimpleChannel> channel1 = CreateObject<SimpleChannel>();
NetDeviceContainer d02 = devHelper.Install(nodes.Get(0), channel1);
d02.Add(devHelper.Install(nodes.Get(2), channel1));
Ptr<SimpleChannel> channel2 = CreateObject<SimpleChannel>();
NetDeviceContainer d12 = devHelper.Install(nodes.Get(1), channel2);
d12.Add(devHelper.Install(nodes.Get(2), channel2));
Ptr<SimpleChannel> channel3 = CreateObject<SimpleChannel>();
NetDeviceContainer d23 = devHelper.Install(nodes.Get(2), channel3);
d23.Add(devHelper.Install(nodes.Get(3), channel3));
// Assign IP addresses to the devices
Ipv4AddressHelper address;
address.SetBase("10.1.1.0", "255.255.255.252");
Ipv4InterfaceContainer i02 = address.Assign(d02);
address.SetBase("10.1.2.0", "255.255.255.252");
Ipv4InterfaceContainer i12 = address.Assign(d12);
address.SetBase("10.1.3.0", "255.255.255.252");
Ipv4InterfaceContainer i23 = address.Assign(d23);
}
void
LinkRoutesTestCase::BuildLsa()
{
// Manually build the link state database; four routers (0-3), 3 point-to-point
// links
// Router 0
auto lr0 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.2", // router ID 0.0.0.2
"10.1.1.1", // local ID
"0.0.0.2", // link id -> router ID 0.0.0.2
"10.1.1.1", // link data -> Local IP address of router 0
1); // metric
auto lr1 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.1.1",
"10.1.1.2", // link id ->adjacent neighbor's IP address
"255.255.255.252",
1);
@@ -91,8 +184,10 @@ GlobalRouteManagerImplTestCase::DoRun()
lsa0->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa0->SetLinkStateId("0.0.0.0");
lsa0->SetAdvertisingRouter("0.0.0.0");
lsa0->SetNode(nodes.Get(0));
lsa0->AddLinkRecord(lr0);
lsa0->AddLinkRecord(lr1);
m_lsas.push_back(lsa0);
// Router 1
auto lr2 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
@@ -101,7 +196,7 @@ GlobalRouteManagerImplTestCase::DoRun()
1);
auto lr3 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.2.1",
"10.1.2.2",
"255.255.255.252",
1);
@@ -111,6 +206,8 @@ GlobalRouteManagerImplTestCase::DoRun()
lsa1->SetAdvertisingRouter("0.0.0.1");
lsa1->AddLinkRecord(lr2);
lsa1->AddLinkRecord(lr3);
lsa1->SetNode(nodes.Get(1));
m_lsas.push_back(lsa1);
// Router 2
auto lr4 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
@@ -119,7 +216,7 @@ GlobalRouteManagerImplTestCase::DoRun()
1);
auto lr5 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.1.2",
"10.1.1.1",
"255.255.255.252",
1);
@@ -135,7 +232,7 @@ GlobalRouteManagerImplTestCase::DoRun()
auto lr8 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.3",
"10.1.3.2",
"10.1.3.1",
1);
auto lr9 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
@@ -153,15 +250,17 @@ GlobalRouteManagerImplTestCase::DoRun()
lsa2->AddLinkRecord(lr7);
lsa2->AddLinkRecord(lr8);
lsa2->AddLinkRecord(lr9);
lsa2->SetNode(nodes.Get(2));
m_lsas.push_back(lsa2);
// Router 3
auto lr10 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.2",
"10.1.2.1",
"10.1.3.2",
1);
auto lr11 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.2.1",
"10.1.3.1",
"255.255.255.252",
1);
@@ -171,37 +270,674 @@ GlobalRouteManagerImplTestCase::DoRun()
lsa3->SetAdvertisingRouter("0.0.0.3");
lsa3->AddLinkRecord(lr10);
lsa3->AddLinkRecord(lr11);
lsa3->SetNode(nodes.Get(3));
m_lsas.push_back(lsa3);
}
void
LinkRoutesTestCase::DoRun()
{
// This test is for checking the individual working of GlobalRouteManagerImpl
// and GlobalRouteManagerLSDB, so we will not use the GlobalRoutingHelper
// to create the routing tables, but instead we will manually create the LSAs
// and insert them into the GlobalRouteManagerLSDB, and then use the
// GlobalRouteManagerImpl to calculate the routes based on the LSDB.
// This is a manual setup of the LSAs, which would normally be done by the
// GlobalRoutingHelper.
BuildLsa();
// Test the database
auto srmlsdb = new GlobalRouteManagerLSDB();
srmlsdb->Insert(lsa0->GetLinkStateId(), lsa0);
srmlsdb->Insert(lsa1->GetLinkStateId(), lsa1);
srmlsdb->Insert(lsa2->GetLinkStateId(), lsa2);
srmlsdb->Insert(lsa3->GetLinkStateId(), lsa3);
NS_TEST_ASSERT_MSG_EQ(lsa2,
srmlsdb->GetLSA(lsa2->GetLinkStateId()),
"The Ipv4Address is not stored as the link state ID");
srmlsdb->Insert(m_lsas[0]->GetLinkStateId(), m_lsas[0]);
srmlsdb->Insert(m_lsas[1]->GetLinkStateId(), m_lsas[1]);
srmlsdb->Insert(m_lsas[2]->GetLinkStateId(), m_lsas[2]);
srmlsdb->Insert(m_lsas[3]->GetLinkStateId(), m_lsas[3]);
NS_TEST_ASSERT_MSG_EQ(
m_lsas[2],
srmlsdb->GetLSA(m_lsas[2]->GetLinkStateId()),
"The Ipv4Address is not stored as the link state ID"); // LSAs are mapped by router id as
// key here we check that they are
// indeed getting the right lsa for
// the right key
// next, calculate routes based on the manually created LSDB
auto srm = new GlobalRouteManagerImpl();
srm->DebugUseLsdb(srmlsdb); // manually add in an LSDB
// Note-- this will succeed without any nodes in the topology
// because the NodeList is empty
srm->DebugSPFCalculate(lsa0->GetLinkStateId()); // node n0
srm->DebugSPFCalculate(m_lsas[0]->GetLinkStateId()); // fill routing table for node n0
srm->DebugSPFCalculate(m_lsas[1]->GetLinkStateId()); // fill routing table for node n1
srm->DebugSPFCalculate(m_lsas[2]->GetLinkStateId()); // fill routing table for node n2
srm->DebugSPFCalculate(m_lsas[3]->GetLinkStateId()); // fill routing table for node n3
Simulator::Run();
/// @todo here we should do some verification of the routes built
//-----------------Now the tests------------------
// Test 1: Check if the SPF calculate Sets default routes for Stub nodes
Ptr<Ipv4L3Protocol> ip0 = nodes.Get(0)->GetObject<Ipv4L3Protocol>();
NS_TEST_ASSERT_MSG_NE(ip0, nullptr, "Error-- no Ipv4 object at node 0");
Ptr<Ipv4RoutingProtocol> routing0 = ip0->GetRoutingProtocol();
NS_TEST_ASSERT_MSG_NE(routing0, nullptr, "Error-- no Ipv4 routing protocol object at node 0");
Ptr<Ipv4GlobalRouting> globalRouting0 = routing0->GetObject<Ipv4GlobalRouting>();
NS_TEST_ASSERT_MSG_NE(globalRouting0, nullptr, "Error-- no Ipv4GlobalRouting object at node 0");
// Check that the right number of entries are in the routing table
uint32_t nRoutes0 = globalRouting0->GetNRoutes();
NS_TEST_ASSERT_MSG_EQ(nRoutes0, 1, "Error-- default route not found for stub node");
Ipv4RoutingTableEntry* route = nullptr;
route = globalRouting0->GetRoute(0);
// the only route is the default route on this node
NS_TEST_ASSERT_MSG_EQ(route->GetDest(),
Ipv4Address("0.0.0.0"),
"Error-- wrong destination for default route");
NS_TEST_ASSERT_MSG_EQ(route->GetGateway(), Ipv4Address("10.1.1.2"), "Error-- wrong gateway");
// Test 2: Check if SPFCalculate sets the correct routes for node 2
Ptr<Ipv4L3Protocol> ip2 = nodes.Get(2)->GetObject<Ipv4L3Protocol>();
NS_TEST_ASSERT_MSG_NE(ip2, nullptr, "Error-- no Ipv4 object at node 2");
Ptr<Ipv4RoutingProtocol> routing2 = ip2->GetRoutingProtocol();
NS_TEST_ASSERT_MSG_NE(routing2, nullptr, "Error-- no Ipv4 routing protocol object at node 2");
Ptr<Ipv4GlobalRouting> globalRouting2 = routing2->GetObject<Ipv4GlobalRouting>();
NS_TEST_ASSERT_MSG_NE(globalRouting2, nullptr, "Error-- no Ipv4GlobalRouting object at node 2");
// check that the correct number of routes were built
uint32_t nRoutes2 = globalRouting2->GetNRoutes();
NS_LOG_DEBUG("LinkRoutesTest nRoutes2 " << nRoutes2);
NS_TEST_ASSERT_MSG_EQ(nRoutes2, 6, "Error--- Incorrect number of routes found on node 2");
// check that all the routes in the routing table are correct for node 2
std::vector<Ipv4Address> expecteddests;
std::vector<Ipv4Address> expectedgws;
expecteddests.emplace_back("10.1.1.1");
expecteddests.emplace_back("10.1.2.1");
expecteddests.emplace_back("10.1.3.2");
expecteddests.emplace_back("10.1.1.0");
expecteddests.emplace_back("10.1.2.0");
expecteddests.emplace_back("10.1.3.0");
expectedgws.emplace_back("10.1.1.1");
expectedgws.emplace_back("10.1.2.1");
expectedgws.emplace_back("10.1.3.2");
expectedgws.emplace_back("10.1.1.1");
expectedgws.emplace_back("10.1.2.1");
expectedgws.emplace_back("10.1.3.2");
CheckRoutes(globalRouting2, expecteddests, expectedgws);
Simulator::Run();
Simulator::Stop(Seconds(3));
Simulator::Destroy();
// This delete clears the srm, which deletes the LSDB, which clears
// all of the LSAs, which each destroys the attached LinkRecords.
delete srm;
// reset the router ID counter to zero so that it does not affect other tests
// that may run after this one in the same program run.
GlobalRouteManager::ResetRouterId();
}
/// @todo Testing
// No testing has actually been done other than making sure that this code
// does not crash
/**
* @ingroup internet-test
*
* @brief This test case is to check if NetworkRoutes are being built correctly, i.e if route
* computation works for a LAN Topology.
*/
class LanRoutesTestCase : public TestCase
{
public:
LanRoutesTestCase();
void DoSetup() override;
void DoRun() override;
private:
/**
*@brief Builds the LSAs for the topology. These LSAs are manually created and inserted into the
* GlobalRouteManagerLSDB.Each node exports a router LSA. In addition,the designated router
* also Exports the Network LSA.
*/
void BuildLsa();
NodeContainer nodes; //!< NodeContainer to hold the nodes in the topology
std::vector<GlobalRoutingLSA*> m_lsas; //!< The LSAs for the topology
};
LanRoutesTestCase::LanRoutesTestCase()
: TestCase("LanRoutesTestCase")
{
}
void
LanRoutesTestCase::DoSetup()
{
// Simple Csma Network with three nodes
//
// n0 n1
// | (shared csma/cd) |
// -------------------------
// |
// n2
//
// n0:10.1.1.1/29
// n1:10.1.1.2/29
// n2:10.1.1.3/29
nodes.Create(3);
Ipv4GlobalRoutingHelper globalhelper;
InternetStackHelper stack;
stack.SetRoutingHelper(globalhelper);
stack.Install(nodes);
SimpleNetDeviceHelper devHelper;
Ptr<SimpleChannel> channel = CreateObject<SimpleChannel>();
NetDeviceContainer d012 = devHelper.Install(nodes.Get(0), channel);
d012.Add(devHelper.Install(nodes.Get(1), channel));
d012.Add(devHelper.Install(nodes.Get(2), channel));
// assign IP addresses to the devices
Ipv4AddressHelper address;
address.SetBase("10.1.1.0", "255.255.255.248");
Ipv4InterfaceContainer i012 = address.Assign(d012);
}
void
LanRoutesTestCase::BuildLsa()
{
// we manually create the link state database, we could have used BuildRoutingTables() but this
// way testing the GlobalRouteManagerImpl without the involvement of GLobalRouter makes it
// easier to debug each individually
// router 0
auto lr0 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::TransitNetwork,
"10.1.1.1",
"10.1.1.1",
1);
auto lsa0 = new GlobalRoutingLSA();
lsa0->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa0->AddLinkRecord(lr0);
lsa0->SetLinkStateId("0.0.0.0");
lsa0->SetAdvertisingRouter("0.0.0.0");
lsa0->SetNode(nodes.Get(0));
m_lsas.push_back(lsa0);
// router 1
auto lr1 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::TransitNetwork,
"10.1.1.1",
"10.1.1.2",
1);
auto lsa1 = new GlobalRoutingLSA();
lsa1->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa1->AddLinkRecord(lr1);
lsa1->SetLinkStateId("0.0.0.1");
lsa1->SetAdvertisingRouter("0.0.0.1");
lsa1->SetNode(nodes.Get(1));
m_lsas.push_back(lsa1);
// router 2
auto lr2 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::TransitNetwork,
"10.1.1.1",
"10.1.1.3",
1);
auto lsa2 = new GlobalRoutingLSA();
lsa2->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa2->AddLinkRecord(lr2);
lsa2->SetLinkStateId("0.0.0.2");
lsa2->SetAdvertisingRouter("0.0.0.2");
lsa2->SetNode(nodes.Get(2));
m_lsas.push_back(lsa2);
// router0 is the designated router for the LAN. it also exports the network LSA
auto lsa0network = new GlobalRoutingLSA();
lsa0network->SetLSType(GlobalRoutingLSA::NetworkLSA);
lsa0network->SetLinkStateId("10.1.1.1");
lsa0network->SetAdvertisingRouter("0.0.0.0");
lsa0network->AddAttachedRouter("10.1.1.1");
lsa0network->AddAttachedRouter("10.1.1.2");
lsa0network->AddAttachedRouter("10.1.1.3");
lsa0network->SetNetworkLSANetworkMask("255.255.255.248");
m_lsas.push_back(lsa0network); // note the index of the network lsa
}
void
LanRoutesTestCase::DoRun()
{
BuildLsa();
// insert the LSAs into the GlobalRouteManagerLSDB
auto srmlsdb = new GlobalRouteManagerLSDB();
srmlsdb->Insert(m_lsas[0]->GetLinkStateId(), m_lsas[0]);
srmlsdb->Insert(m_lsas[1]->GetLinkStateId(), m_lsas[1]);
srmlsdb->Insert(m_lsas[2]->GetLinkStateId(), m_lsas[2]);
srmlsdb->Insert(m_lsas[3]->GetLinkStateId(), m_lsas[3]);
// create the GlobalRouteManagerImpl
auto srm = new GlobalRouteManagerImpl();
srm->DebugUseLsdb(srmlsdb);
srm->DebugSPFCalculate(m_lsas[0]->GetLinkStateId()); // fill the routing table for node 0
// now the tests-----------------------
Ptr<Ipv4L3Protocol> ip0 = nodes.Get(0)->GetObject<Ipv4L3Protocol>();
NS_TEST_ASSERT_MSG_NE(ip0, nullptr, "Error-- no Ipv4 object at node 0");
Ptr<Ipv4RoutingProtocol> routing0 = ip0->GetRoutingProtocol();
NS_TEST_ASSERT_MSG_NE(routing0, nullptr, "Error-- no Ipv4 routing protocol object at node 0");
Ptr<Ipv4GlobalRouting> globalRouting0 = routing0->GetObject<Ipv4GlobalRouting>();
NS_TEST_ASSERT_MSG_NE(globalRouting0, nullptr, "Error-- no Ipv4GlobalRouting object at node 0");
// The only route to check is the network route
uint32_t nRoutes0 = globalRouting0->GetNRoutes();
NS_TEST_ASSERT_MSG_EQ(nRoutes0, 1, "Error-- Network route not found for node 0");
Ipv4RoutingTableEntry* route = globalRouting0->GetRoute(0);
NS_TEST_ASSERT_MSG_EQ(route->GetDest(),
Ipv4Address("10.1.1.0"),
"Error-- wrong destination for network route");
NS_TEST_ASSERT_MSG_EQ(route->GetGateway(),
Ipv4Address("0.0.0.0"),
"Error-- wrong gateway for network route");
Simulator::Run();
Simulator::Stop(Seconds(3));
Simulator::Destroy();
// This delete clears the srm, which deletes the LSDB, which clears
// all of the LSAs, which each destroys the attached LinkRecords.
delete srm;
GlobalRouteManager::ResetRouterId();
}
/**
* @ingroup internet-test
*
* @brief The purpose of this test is to check if Equal Cost MultiPath (ECMP) Routes are being built
* and used correctly.
*/
class RandomEcmpTestCase : public TestCase
{
public:
RandomEcmpTestCase();
void DoSetup() override;
void DoRun() override;
private:
/**
*@brief Builds the LSAs for the topology. These LSAs are manually created and inserted into the
* GlobalRouteManagerLSDB.Each node exports a router LSA.
*/
void BuildLsa();
/**
* @brief Helper function that checks the output of the routing path
* and increments the corresponding route counter.
* @param route The routing path to check
*/
void IncrementCount(Ptr<Ipv4Route>& route);
/**
* @brief function that checks the routing table entries for the expected output.
* @param globalroutingprotocol The routing protocol for the node whose routing table is to be
* checked.
* @param dests The expected destinations.
* @param gws The expected gateways.
*/
void CheckRoutes(Ptr<Ipv4GlobalRouting>& globalroutingprotocol,
std::vector<Ipv4Address>& dests,
std::vector<Ipv4Address>& gws);
uint32_t route1 = 0; //!< Counter to keep track of the number of times route1 is used
uint32_t route2 = 0; //!< Counter to keep track of the number of times route2 is used
NodeContainer nodes; //!< NodeContainer to hold the nodes in the topology
std::vector<GlobalRoutingLSA*> m_lsas; //!< The LSAs for the topology
};
RandomEcmpTestCase::RandomEcmpTestCase()
: TestCase("RandomEcmpTestCase")
{
}
void
RandomEcmpTestCase::DoSetup()
{
Config::SetDefault("ns3::Ipv4GlobalRouting::RandomEcmpRouting", BooleanValue(true));
/*
// Creating a Simple topology with 4 nodes and 3 links
//
//
//
// ------n1------
// / \
// / \
// n0 n3
// \ /
// \ /
// ------n2------
//
// Link n0-n1: 10.1.1.1/30,10.1.1.2/30
// Link n0-n2: 10.1.2.1/30,10.1.2.2/30
// Link n1-n3: 10.1.3.1/30,10.1.3.2/30
// Link n2-n3: 10.1.4.1/30,10.1.4.2/30
*/
nodes.Create(4);
Ipv4GlobalRoutingHelper globalhelper;
InternetStackHelper stack;
stack.SetRoutingHelper(globalhelper);
stack.Install(nodes);
SimpleNetDeviceHelper devHelper;
devHelper.SetNetDevicePointToPointMode(true);
Ptr<SimpleChannel> channel1 = CreateObject<SimpleChannel>();
NetDeviceContainer d01 = devHelper.Install(nodes.Get(0), channel1);
d01.Add(devHelper.Install(nodes.Get(1), channel1));
Ptr<SimpleChannel> channel2 = CreateObject<SimpleChannel>();
NetDeviceContainer d23 = devHelper.Install(nodes.Get(2), channel2);
d23.Add(devHelper.Install(nodes.Get(3), channel2));
Ptr<SimpleChannel> channel3 = CreateObject<SimpleChannel>();
NetDeviceContainer d02 = devHelper.Install(nodes.Get(0), channel3);
d02.Add(devHelper.Install(nodes.Get(2), channel3));
Ptr<SimpleChannel> channel4 = CreateObject<SimpleChannel>();
NetDeviceContainer d13 = devHelper.Install(nodes.Get(1), channel4);
d13.Add(devHelper.Install(nodes.Get(3), channel4));
// Assign IP addresses to the devices
Ipv4AddressHelper address;
address.SetBase("10.1.1.0", "255.255.255.252");
Ipv4InterfaceContainer i01 = address.Assign(d01);
address.SetBase("10.1.2.0", "255.255.255.252");
Ipv4InterfaceContainer i02 = address.Assign(d02);
address.SetBase("10.1.3.0", "255.255.255.252");
Ipv4InterfaceContainer i13 = address.Assign(d13);
address.SetBase("10.1.4.0", "255.255.255.252");
Ipv4InterfaceContainer i23 = address.Assign(d23);
}
void
RandomEcmpTestCase::CheckRoutes(Ptr<Ipv4GlobalRouting>& globalroutingprotocol,
std::vector<Ipv4Address>& dests,
std::vector<Ipv4Address>& gws)
{
// check each individual routes destination and gateway
for (uint32_t i = 0; i < globalroutingprotocol->GetNRoutes(); i++)
{
Ipv4RoutingTableEntry* route = globalroutingprotocol->GetRoute(i);
NS_LOG_DEBUG("dest " << route->GetDest() << " gw " << route->GetGateway());
NS_TEST_ASSERT_MSG_EQ(route->GetDest(), dests[i], "Error-- wrong destination");
NS_TEST_ASSERT_MSG_EQ(route->GetGateway(), gws[i], "Error-- wrong gateway");
}
}
void
RandomEcmpTestCase::IncrementCount(Ptr<Ipv4Route>& route)
{
if (route->GetGateway() == Ipv4Address("10.1.1.2"))
{
route1++;
}
else if (route->GetGateway() == Ipv4Address("10.1.2.2"))
{
route2++;
}
}
void
RandomEcmpTestCase::BuildLsa()
{
// we manually create the link state database, we could have used BuildRoutingTables() but this
// way testing the GlobalRouteManagerImpl without the involvement of GLobalRouter makes it
// easier to debug each individually
// router 0
auto lr0 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.1",
"10.1.1.1",
1);
auto lr1 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.1.2",
"255.255.255.252",
1);
auto lr2 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.2",
"10.1.2.1",
1);
auto lr3 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.2.2",
"255.255.255.252",
1);
auto lsa0 = new GlobalRoutingLSA();
lsa0->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa0->SetStatus(GlobalRoutingLSA::LSA_SPF_NOT_EXPLORED);
lsa0->SetLinkStateId("0.0.0.0");
lsa0->SetAdvertisingRouter("0.0.0.0");
lsa0->SetNode(nodes.Get(0));
lsa0->AddLinkRecord(lr0);
lsa0->AddLinkRecord(lr1);
lsa0->AddLinkRecord(lr2);
lsa0->AddLinkRecord(lr3);
m_lsas.push_back(lsa0);
// router 1
auto lr4 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.0",
"10.1.1.2",
1);
auto lr5 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.1.1",
"255.255.255.252",
1);
auto lr6 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.3",
"10.1.3.1",
1);
auto lr7 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.3.2",
"255.255.255.252",
1);
auto lsa1 = new GlobalRoutingLSA();
lsa1->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa1->SetStatus(GlobalRoutingLSA::LSA_SPF_NOT_EXPLORED);
lsa1->SetLinkStateId("0.0.0.1");
lsa1->SetAdvertisingRouter("0.0.0.1");
lsa1->SetNode(nodes.Get(1));
lsa1->AddLinkRecord(lr4);
lsa1->AddLinkRecord(lr5);
lsa1->AddLinkRecord(lr6);
lsa1->AddLinkRecord(lr7);
m_lsas.push_back(lsa1);
// router 2
auto lr8 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.0",
"10.1.2.2",
1);
auto lr9 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.2.1",
"255.255.255.252",
1);
auto lr10 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.3",
"10.1.4.1",
1);
auto lr11 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.4.2",
"255.255.255.252",
1);
auto lsa2 = new GlobalRoutingLSA();
lsa2->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa2->SetStatus(GlobalRoutingLSA::LSA_SPF_NOT_EXPLORED);
lsa2->SetLinkStateId("0.0.0.2");
lsa2->SetAdvertisingRouter("0.0.0.2");
lsa2->SetNode(nodes.Get(2));
lsa2->AddLinkRecord(lr8);
lsa2->AddLinkRecord(lr9);
lsa2->AddLinkRecord(lr10);
lsa2->AddLinkRecord(lr11);
m_lsas.push_back(lsa2);
// router 3
auto lr12 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.1",
"10.1.3.2",
1);
auto lr13 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.3.1",
"255.255.255.252",
1);
auto lr14 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::PointToPoint,
"0.0.0.2",
"10.1.4.2",
1);
auto lr15 = new GlobalRoutingLinkRecord(GlobalRoutingLinkRecord::StubNetwork,
"10.1.4.1",
"255.255.255.252",
1);
auto lsa3 = new GlobalRoutingLSA();
lsa3->SetLSType(GlobalRoutingLSA::RouterLSA);
lsa3->SetStatus(GlobalRoutingLSA::LSA_SPF_NOT_EXPLORED);
lsa3->SetLinkStateId("0.0.0.3");
lsa3->SetAdvertisingRouter("0.0.0.3");
lsa3->SetNode(nodes.Get(3));
lsa3->AddLinkRecord(lr12);
lsa3->AddLinkRecord(lr13);
lsa3->AddLinkRecord(lr14);
lsa3->AddLinkRecord(lr15);
m_lsas.push_back(lsa3);
}
void
RandomEcmpTestCase::DoRun()
{
// We need a deterministic output to pass the test. So we set a fixed seed and run for our
// UniformRandomVariable
uint32_t oldseed = RngSeedManager::GetSeed();
uint32_t oldrun = RngSeedManager::GetRun();
RngSeedManager::SetSeed(1);
RngSeedManager::SetRun(1);
BuildLsa();
// insert the LSAs into the GlobalRouteManagerLSDB
auto srmlsdb = new GlobalRouteManagerLSDB();
srmlsdb->Insert(m_lsas[0]->GetLinkStateId(), m_lsas[0]);
srmlsdb->Insert(m_lsas[1]->GetLinkStateId(), m_lsas[1]);
srmlsdb->Insert(m_lsas[2]->GetLinkStateId(), m_lsas[2]);
srmlsdb->Insert(m_lsas[3]->GetLinkStateId(), m_lsas[3]);
// create the GlobalRouteManagerImpl
auto srm = new GlobalRouteManagerImpl();
srm->DebugUseLsdb(srmlsdb);
// we manually call the DebugSPFCalculate to fill the routing tables for node 0
srm->DebugSPFCalculate(m_lsas[0]->GetLinkStateId());
// now the tests-----------------------
Ptr<Ipv4L3Protocol> ip0 = nodes.Get(0)->GetObject<Ipv4L3Protocol>();
NS_TEST_ASSERT_MSG_NE(ip0, nullptr, "Error-- no Ipv4 object at node 0");
Ptr<Ipv4RoutingProtocol> routing0 = ip0->GetRoutingProtocol();
NS_TEST_ASSERT_MSG_NE(routing0, nullptr, "Error-- no Ipv4 routing protocol object at node 0");
Ptr<Ipv4GlobalRouting> globalRouting0 = routing0->GetObject<Ipv4GlobalRouting>();
NS_TEST_ASSERT_MSG_NE(globalRouting0, nullptr, "Error-- no Ipv4GlobalRouting object at node 0");
// assign streams to the UniformRandomVariable
globalRouting0->AssignStreams(0);
// check that the correct number of routes were built
uint32_t nRoutes0 = globalRouting0->GetNRoutes();
NS_TEST_ASSERT_MSG_EQ(nRoutes0, 14, "Error-- incorrect number of routes found on node 0");
// check that the routes are correct
std::vector<Ipv4Address> expectedDests;
std::vector<Ipv4Address> expectedNextHops;
// add all the expected destinations and gateways. This is pretty verbose
// Please Note: The order of the following line is important because we check the routing table
// entries in order. The test will fail if we reorder the vector entries.
// For Routing table of Node 0 we check the following Destinations and Gateways
expectedDests.emplace_back("10.1.1.2");
expectedDests.emplace_back("10.1.3.1");
expectedDests.emplace_back("10.1.2.2");
expectedDests.emplace_back("10.1.4.1");
expectedDests.emplace_back("10.1.3.2");
expectedDests.emplace_back("10.1.3.2");
expectedDests.emplace_back("10.1.4.2");
expectedDests.emplace_back("10.1.4.2");
expectedDests.emplace_back("10.1.1.0");
expectedDests.emplace_back("10.1.3.0");
expectedDests.emplace_back("10.1.3.0");
expectedDests.emplace_back("10.1.4.0");
expectedDests.emplace_back("10.1.4.0");
expectedDests.emplace_back("10.1.2.0");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.2.2");
expectedNextHops.emplace_back("10.1.2.2");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.2.2");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.2.2");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.2.2");
expectedNextHops.emplace_back("10.1.1.2");
expectedNextHops.emplace_back("10.1.2.2");
expectedNextHops.emplace_back("10.1.2.2");
// Test 1: Check the Routing Table of Node 0
CheckRoutes(globalRouting0, expectedDests, expectedNextHops);
// Test 2: Check that the equal cost routes are being used at least once.
// we need to call RouteOutput() at node 0 and check the output
// route from the table. The thing to check here is that different equal cost routes are
// returned across different calls to this method.
Socket::SocketErrno errno_;
Ptr<NetDevice> oif(nullptr);
Ptr<Packet> packet = Create<Packet>();
Ipv4Header ipHeader;
ipHeader.SetSource(Ipv4Address("10.1.1.1"));
ipHeader.SetDestination(Ipv4Address("10.1.4.2"));
for (uint32_t i = 0; i < 10; i++)
{
Ptr<Ipv4Route> route = globalRouting0->RouteOutput(packet, ipHeader, oif, errno_);
IncrementCount(route);
}
Simulator::Run();
NS_TEST_ASSERT_MSG_GT_OR_EQ(
route1,
1,
"The routing path for node 0 to node 3 does not match the expected output, "
"Equal Cost MultiPath (ECMP) routes are not being used correctly");
NS_TEST_ASSERT_MSG_GT_OR_EQ(
route2,
1,
"The routing path for node 0 to node 3 does not match the expected output, "
"Equal Cost MultiPath (ECMP) routes are not being used correctly");
// end of test--------------------
Simulator::Stop(Seconds(5));
Simulator::Destroy();
RngSeedManager::SetSeed(oldseed);
RngSeedManager::SetRun(oldrun);
// This delete clears the srm, which deletes the LSDB, which clears
// all of the LSAs, which each destroys the attached LinkRecords.
delete srm;
}
/**
@@ -220,7 +956,9 @@ class GlobalRouteManagerImplTestSuite : public TestSuite
GlobalRouteManagerImplTestSuite::GlobalRouteManagerImplTestSuite()
: TestSuite("global-route-manager-impl", Type::UNIT)
{
AddTestCase(new GlobalRouteManagerImplTestCase(), TestCase::Duration::QUICK);
AddTestCase(new LinkRoutesTestCase(), TestCase::Duration::QUICK);
AddTestCase(new LanRoutesTestCase(), TestCase::Duration::QUICK);
AddTestCase(new RandomEcmpTestCase(), TestCase::Duration::QUICK);
}
static GlobalRouteManagerImplTestSuite