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DHTBucketTest.cc
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#include "DHTBucket.h"
#include <cstring>
#include <algorithm>
#include <cppunit/extensions/HelperMacros.h>
#include "DHTNode.h"
#include "Exception.h"
#include "util.h"
namespace aria2 {
class DHTBucketTest : public CppUnit::TestFixture {
CPPUNIT_TEST_SUITE(DHTBucketTest);
CPPUNIT_TEST(testGetRandomNodeID);
CPPUNIT_TEST(testIsInRange);
CPPUNIT_TEST(testSplitAllowed);
CPPUNIT_TEST(testSplit);
CPPUNIT_TEST(testAddNode);
CPPUNIT_TEST(testMoveToHead);
CPPUNIT_TEST(testMoveToTail);
CPPUNIT_TEST(testGetGoodNodes);
CPPUNIT_TEST(testCacheNode);
CPPUNIT_TEST(testDropNode);
CPPUNIT_TEST(testGetNode);
CPPUNIT_TEST_SUITE_END();
public:
void setUp() {}
void tearDown() {}
void testGetRandomNodeID();
void testIsInRange();
void testSplitAllowed();
void testSplit();
void testAddNode();
void testMoveToHead();
void testMoveToTail();
void testGetGoodNodes();
void testCacheNode();
void testDropNode();
void testGetNode();
};
CPPUNIT_TEST_SUITE_REGISTRATION(DHTBucketTest);
void DHTBucketTest::testGetRandomNodeID()
{
unsigned char localNodeID[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
{
DHTBucket bucket(localNode);
unsigned char nodeID[DHT_ID_LENGTH];
bucket.getRandomNodeID(nodeID);
}
{
unsigned char max[] = {0x01, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
unsigned char min[] = {0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
DHTBucket bucket(16, max, min, localNode);
unsigned char nodeID[DHT_ID_LENGTH];
bucket.getRandomNodeID(nodeID);
CPPUNIT_ASSERT_EQUAL(std::string("0101"),
util::toHex(nodeID, sizeof(nodeID)).substr(0, 4));
}
}
void DHTBucketTest::testIsInRange()
{
unsigned char localNodeID[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
{
unsigned char nodeID[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> node(new DHTNode(nodeID));
DHTBucket bucket(localNode);
CPPUNIT_ASSERT(bucket.isInRange(node));
memset(nodeID, 0xff, sizeof(nodeID));
CPPUNIT_ASSERT(bucket.isInRange(node));
}
{
unsigned char max[] = {0x01, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
unsigned char min[] = {0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
{
// min
unsigned char nodeID[] = {0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> node(new DHTNode(nodeID));
DHTBucket bucket(16, max, min, localNode);
CPPUNIT_ASSERT(bucket.isInRange(node));
}
{
// max
unsigned char nodeID[] = {0x01, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
std::shared_ptr<DHTNode> node(new DHTNode(nodeID));
DHTBucket bucket(16, max, min, localNode);
CPPUNIT_ASSERT(bucket.isInRange(node));
}
{
unsigned char nodeID[] = {0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
std::shared_ptr<DHTNode> node(new DHTNode(nodeID));
DHTBucket bucket(16, max, min, localNode);
CPPUNIT_ASSERT(bucket.isInRange(node));
}
{
// nodeID is out of range: smaller than this range
unsigned char nodeID[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> node(new DHTNode(nodeID));
DHTBucket bucket(16, max, min, localNode);
CPPUNIT_ASSERT(!bucket.isInRange(node));
}
{
// nodeID is out of range: larger than this range
unsigned char nodeID[] = {0x01, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
std::shared_ptr<DHTNode> node(new DHTNode(nodeID));
DHTBucket bucket(16, max, min, localNode);
CPPUNIT_ASSERT(!bucket.isInRange(node));
}
}
}
void DHTBucketTest::testSplitAllowed()
{
{
unsigned char localNodeID[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
CPPUNIT_ASSERT(bucket.splitAllowed());
}
{
unsigned char max[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
unsigned char min[] = {0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
{
unsigned char localNodeID[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(3, max, min, localNode);
CPPUNIT_ASSERT(!bucket.splitAllowed());
}
{
unsigned char localNodeID[] = {0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(3, max, min, localNode);
CPPUNIT_ASSERT(bucket.splitAllowed());
}
}
}
void DHTBucketTest::testSplit()
{
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
{
DHTBucket bucket(localNode);
std::shared_ptr<DHTBucket> r = bucket.split();
{
unsigned char expectedRMax[] = {
0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
unsigned char expectedRMin[DHT_ID_LENGTH];
memset(expectedRMin, 0, DHT_ID_LENGTH);
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedRMax, DHT_ID_LENGTH),
util::toHex(r->getMaxID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedRMin, DHT_ID_LENGTH),
util::toHex(r->getMinID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL((size_t)1, r->getPrefixLength());
}
{
unsigned char expectedLMax[DHT_ID_LENGTH];
memset(expectedLMax, 0xff, DHT_ID_LENGTH);
unsigned char expectedLMin[] = {
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedLMax, DHT_ID_LENGTH),
util::toHex(bucket.getMaxID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedLMin, DHT_ID_LENGTH),
util::toHex(bucket.getMinID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL((size_t)1, bucket.getPrefixLength());
}
}
{
std::shared_ptr<DHTBucket> bucket(new DHTBucket(localNode));
for (int i = 0; i < 159; ++i) {
CPPUNIT_ASSERT(bucket->splitAllowed());
std::shared_ptr<DHTBucket> t = bucket;
bucket = bucket->split();
CPPUNIT_ASSERT(!t->splitAllowed());
}
CPPUNIT_ASSERT(!bucket->splitAllowed());
unsigned char expectedMax[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
unsigned char expectedMin[DHT_ID_LENGTH];
memset(expectedMin, 0, DHT_ID_LENGTH);
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedMax, DHT_ID_LENGTH),
util::toHex(bucket->getMaxID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedMin, DHT_ID_LENGTH),
util::toHex(bucket->getMinID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL((size_t)159, bucket->getPrefixLength());
}
}
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
localNodeID[0] = 0x80;
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
std::shared_ptr<DHTBucket> r = bucket.split();
{
unsigned char expectedRMax[] = {0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
unsigned char expectedRMin[DHT_ID_LENGTH];
memset(expectedRMin, 0, DHT_ID_LENGTH);
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedRMax, DHT_ID_LENGTH),
util::toHex(r->getMaxID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedRMin, DHT_ID_LENGTH),
util::toHex(r->getMinID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL((size_t)1, r->getPrefixLength());
}
{
unsigned char expectedLMax[DHT_ID_LENGTH];
memset(expectedLMax, 0xff, DHT_ID_LENGTH);
unsigned char expectedLMin[] = {0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedLMax, DHT_ID_LENGTH),
util::toHex(bucket.getMaxID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL(util::toHex(expectedLMin, DHT_ID_LENGTH),
util::toHex(bucket.getMinID(), DHT_ID_LENGTH));
CPPUNIT_ASSERT_EQUAL((size_t)1, bucket.getPrefixLength());
}
}
}
namespace {
void createID(unsigned char* id, unsigned char firstChar,
unsigned char lastChar)
{
memset(id, 0, DHT_ID_LENGTH);
id[0] = firstChar;
id[DHT_ID_LENGTH - 1] = lastChar;
}
} // namespace
void DHTBucketTest::testAddNode()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
unsigned char id[DHT_ID_LENGTH];
std::shared_ptr<DHTNode> nodes[8];
for (size_t i = 0; i < DHTBucket::K; ++i) {
createID(id, 0xf0, i);
nodes[i].reset(new DHTNode(id));
CPPUNIT_ASSERT(bucket.addNode(nodes[i]));
}
createID(id, 0xf0, 0xff);
std::shared_ptr<DHTNode> newNode(new DHTNode(id));
CPPUNIT_ASSERT(!bucket.addNode(newNode));
// nodes[0] is located at the tail of the bucket(least recent seen)
nodes[0]->markBad();
CPPUNIT_ASSERT(bucket.addNode(newNode));
CPPUNIT_ASSERT(*bucket.getNodes().back() == *newNode);
}
void DHTBucketTest::testMoveToHead()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
unsigned char id[DHT_ID_LENGTH];
std::shared_ptr<DHTNode> nodes[8];
for (size_t i = 0; i < DHTBucket::K; ++i) {
createID(id, 0xf0, i);
nodes[i].reset(new DHTNode(id));
CPPUNIT_ASSERT(bucket.addNode(nodes[i]));
}
bucket.moveToHead(nodes[DHTBucket::K - 1]);
CPPUNIT_ASSERT(*bucket.getNodes().front() == *nodes[DHTBucket::K - 1]);
}
void DHTBucketTest::testMoveToTail()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
unsigned char id[DHT_ID_LENGTH];
std::shared_ptr<DHTNode> nodes[8];
for (size_t i = 0; i < DHTBucket::K; ++i) {
createID(id, 0xf0, i);
nodes[i].reset(new DHTNode(id));
CPPUNIT_ASSERT(bucket.addNode(nodes[i]));
}
bucket.moveToTail(nodes[0]);
CPPUNIT_ASSERT(*bucket.getNodes().back() == *nodes[0]);
}
void DHTBucketTest::testGetGoodNodes()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
unsigned char id[DHT_ID_LENGTH];
std::shared_ptr<DHTNode> nodes[8];
for (size_t i = 0; i < DHTBucket::K; ++i) {
createID(id, 0xf0, i);
nodes[i].reset(new DHTNode(id));
nodes[i]->setPort(6881 + i);
CPPUNIT_ASSERT(bucket.addNode(nodes[i]));
}
nodes[3]->markBad();
nodes[5]->markBad();
std::vector<std::shared_ptr<DHTNode>> goodNodes;
bucket.getGoodNodes(goodNodes);
CPPUNIT_ASSERT_EQUAL((size_t)6, goodNodes.size());
CPPUNIT_ASSERT_EQUAL((uint16_t)6881, goodNodes[0]->getPort());
CPPUNIT_ASSERT_EQUAL((uint16_t)6882, goodNodes[1]->getPort());
CPPUNIT_ASSERT_EQUAL((uint16_t)6883, goodNodes[2]->getPort());
CPPUNIT_ASSERT_EQUAL((uint16_t)6885, goodNodes[3]->getPort());
CPPUNIT_ASSERT_EQUAL((uint16_t)6887, goodNodes[4]->getPort());
CPPUNIT_ASSERT_EQUAL((uint16_t)6888, goodNodes[5]->getPort());
}
void DHTBucketTest::testCacheNode()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
std::shared_ptr<DHTNode> n1(new DHTNode());
std::shared_ptr<DHTNode> n2(new DHTNode());
std::shared_ptr<DHTNode> n3(new DHTNode());
bucket.cacheNode(n1);
bucket.cacheNode(n2);
CPPUNIT_ASSERT_EQUAL((size_t)2, bucket.getCachedNodes().size());
CPPUNIT_ASSERT(*n2 == *bucket.getCachedNodes()[0]);
bucket.cacheNode(n3);
CPPUNIT_ASSERT_EQUAL((size_t)2, bucket.getCachedNodes().size());
CPPUNIT_ASSERT(*n3 == *bucket.getCachedNodes()[0]);
CPPUNIT_ASSERT(*n2 == *bucket.getCachedNodes()[1]);
}
void DHTBucketTest::testDropNode()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
unsigned char id[DHT_ID_LENGTH];
std::shared_ptr<DHTNode> nodes[8];
for (size_t i = 0; i < DHTBucket::K; ++i) {
createID(id, 0xf0, i);
nodes[i].reset(new DHTNode(id));
nodes[i]->setPort(6881 + i);
CPPUNIT_ASSERT(bucket.addNode(nodes[i]));
}
std::shared_ptr<DHTNode> cachedNode1(new DHTNode());
std::shared_ptr<DHTNode> cachedNode2(new DHTNode());
bucket.dropNode(nodes[3]);
// nothing happens because the replacement cache is empty.
{
std::deque<std::shared_ptr<DHTNode>> tnodes = bucket.getNodes();
CPPUNIT_ASSERT_EQUAL((size_t)8, tnodes.size());
CPPUNIT_ASSERT(*nodes[3] == *tnodes[3]);
}
bucket.cacheNode(cachedNode1);
bucket.cacheNode(cachedNode2);
bucket.dropNode(nodes[3]);
{
std::deque<std::shared_ptr<DHTNode>> tnodes = bucket.getNodes();
CPPUNIT_ASSERT_EQUAL((size_t)8, tnodes.size());
CPPUNIT_ASSERT(tnodes.end() == std::find_if(tnodes.begin(), tnodes.end(),
derefEqual(nodes[3])));
CPPUNIT_ASSERT(*cachedNode2 == *tnodes[7]);
}
CPPUNIT_ASSERT_EQUAL((size_t)1, bucket.getCachedNodes().size());
CPPUNIT_ASSERT(*cachedNode1 == *bucket.getCachedNodes()[0]);
}
void DHTBucketTest::testGetNode()
{
unsigned char localNodeID[DHT_ID_LENGTH];
memset(localNodeID, 0, DHT_ID_LENGTH);
std::shared_ptr<DHTNode> localNode(new DHTNode(localNodeID));
DHTBucket bucket(localNode);
unsigned char id[DHT_ID_LENGTH];
createID(id, 0xf0, 0);
std::shared_ptr<DHTNode> node(new DHTNode(id));
node->setIPAddress("192.168.0.1");
node->setPort(6881);
CPPUNIT_ASSERT(bucket.addNode(node));
CPPUNIT_ASSERT(bucket.getNode(id, "192.168.0.1", 6881));
CPPUNIT_ASSERT(!bucket.getNode(id, "192.168.0.2", 6881));
CPPUNIT_ASSERT(!bucket.getNode(id, "192.168.0.1", 6882));
CPPUNIT_ASSERT(!bucket.getNode(localNodeID, "192.168.0.1", 6881));
}
} // namespace aria2