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internet: (fixes #1210) Clarify routing decisions in ipv4-global-routing test

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This commit is contained in:
Tommaso Pecorella
2025-04-11 22:07:53 +02:00
committed by Tommaso Pecorella
parent 11ae5e4cad
commit e5dc563406
1 changed files with 40 additions and 64 deletions
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104
src/internet/test/ipv4-global-routing-test-suite.cc
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@@ -875,8 +875,8 @@ Ipv4DynamicGlobalRoutingTestCase::Ipv4DynamicGlobalRoutingTestCase()
: TestCase("Dynamic global routing example"),
m_count(0)
{
m_firstInterface.resize(16);
m_secondInterface.resize(16);
m_firstInterface.resize(16, 0);
m_secondInterface.resize(16, 0);
m_dataRate = DataRate("2kbps");
m_packetSize = 50;
}
@@ -1071,69 +1071,45 @@ Ipv4DynamicGlobalRoutingTestCase::DoRun()
Simulator::Run();
NS_TEST_ASSERT_MSG_EQ(m_count, 70, "Dynamic global routing did not deliver all packets");
// Test that for node n6, the interface facing n5 receives packets at
// Test that for node n6, the interface facing n1 receives packets at
// times (1-2), (4-6), (8-10), (11-12), (14-16) and the interface
// facing n1 receives packets at times (2-4), (6-8), (12-13)
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[1],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[1]));
NS_TEST_ASSERT_MSG_EQ(m_secondInterface[2],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_secondInterface[2]));
NS_TEST_ASSERT_MSG_EQ(m_secondInterface[3],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_secondInterface[3]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[4],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[4]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[5],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[5]));
NS_TEST_ASSERT_MSG_EQ(m_secondInterface[6],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_secondInterface[6]));
NS_TEST_ASSERT_MSG_EQ(m_secondInterface[7],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_secondInterface[7]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[8],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[8]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[9],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[9]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[10],
0,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[10]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[11],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[11]));
NS_TEST_ASSERT_MSG_EQ(m_secondInterface[12],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_secondInterface[12]));
NS_TEST_ASSERT_MSG_EQ(m_secondInterface[13],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_secondInterface[13]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[14],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[14]));
NS_TEST_ASSERT_MSG_EQ(m_firstInterface[15],
5,
"Dynamic global routing did not deliver all packets "
<< int(m_firstInterface[15]));
// facing n5 receives packets at times (2-4), (6-8), (12-13)
// Note: there are two sending sockets, both on n1.
// The first socket sends packets at time (1-10), the second at time (11, 16).
// The first socket sends packets to n6, targeting the address facing n5.
// The second socket sends packets to n6, targeting the address facing n1.
// This actually doesn't matter, as n6 will accept packets sent to the "wrong" address.
//
// The shortest path netween n1 and n6 is the direct one, but the topology changes during the
// simulation:
// - (2-4): removal from n1 of the interface toward n6
// - (6-8): removal from n6 of the interface toward n1
// - (12-14): removal from n1 of the interface toward n6
// When the link is broken, packets are rerouted though the longest (and only) path, reaching
// n6 though n5.
std::vector<uint8_t> firstInterfaceTest{0, 5, 0, 0, 5, 5, 0, 0, 5, 5, 0, 5, 0, 0, 5, 5};
std::vector<uint8_t> secondInterfaceTest{0, 0, 5, 5, 0, 0, 5, 5, 0, 0, 0, 0, 5, 5, 0, 0};
for (uint32_t index = 0; index < firstInterfaceTest.size(); index++)
{
NS_TEST_ASSERT_MSG_EQ(firstInterfaceTest[index],
m_firstInterface[index],
"Dynamic global routing did deliver the wrong number of packets "
"to the first interface at time "
<< index);
}
for (uint32_t index = 0; index < secondInterfaceTest.size(); index++)
{
NS_TEST_ASSERT_MSG_EQ(secondInterfaceTest[index],
m_secondInterface[index],
"Dynamic global routing did deliver the wrong number of packets "
"to the second interface at time "
<< index);
}
Simulator::Destroy();
}