src/test/addrman_tests.cpp

   1 // Copyright (c) 2012-2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4 #include <addrman.h>
   5 #include <test/test_bitcoin.h>
   6 #include <string>
   7 #include <boost/test/unit_test.hpp>
   8
   9 #include <hash.h>
  10 #include <netbase.h>
  11 #include <random.h>
  12
  13 class CAddrManTest : public CAddrMan
  14 {
  15     uint64_t state;
  16
  17 public:
  18     explicit CAddrManTest(bool makeDeterministic = true)
  19     {
  20         state = 1;
  21
  22         if (makeDeterministic) {
  23             //  Set addrman addr placement to be deterministic.
  24             MakeDeterministic();
  25         }
  26     }
  27
  28     //! Ensure that bucket placement is always the same for testing purposes.
  29     void MakeDeterministic()
  30     {
  31         nKey.SetNull();
  32         insecure_rand = FastRandomContext(true);
  33     }
  34
  35     int RandomInt(int nMax) override
  36     {
  37         state = (CHashWriter(SER_GETHASH, 0) << state).GetHash().GetCheapHash();
  38         return (unsigned int)(state % nMax);
  39     }
  40
  41     CAddrInfo* Find(const CNetAddr& addr, int* pnId = nullptr)
  42     {
  43         return CAddrMan::Find(addr, pnId);
  44     }
  45
  46     CAddrInfo* Create(const CAddress& addr, const CNetAddr& addrSource, int* pnId = nullptr)
  47     {
  48         return CAddrMan::Create(addr, addrSource, pnId);
  49     }
  50
  51     void Delete(int nId)
  52     {
  53         CAddrMan::Delete(nId);
  54     }
  55 };
  56
  57 static CNetAddr ResolveIP(const char* ip)
  58 {
  59     CNetAddr addr;
  60     BOOST_CHECK_MESSAGE(LookupHost(ip, addr, false), strprintf("failed to resolve: %s", ip));
  61     return addr;
  62 }
  63
  64 static CNetAddr ResolveIP(std::string ip)
  65 {
  66     return ResolveIP(ip.c_str());
  67 }
  68
  69 static CService ResolveService(const char* ip, int port = 0)
  70 {
  71     CService serv;
  72     BOOST_CHECK_MESSAGE(Lookup(ip, serv, port, false), strprintf("failed to resolve: %s:%i", ip, port));
  73     return serv;
  74 }
  75
  76 static CService ResolveService(std::string ip, int port = 0)
  77 {
  78     return ResolveService(ip.c_str(), port);
  79 }
  80
  81 BOOST_FIXTURE_TEST_SUITE(addrman_tests, BasicTestingSetup)
  82
  83 BOOST_AUTO_TEST_CASE(addrman_simple)
  84 {
  85     CAddrManTest addrman;
  86
  87     CNetAddr source = ResolveIP("252.2.2.2");
  88
  89     // Test: Does Addrman respond correctly when empty.
  90     BOOST_CHECK_EQUAL(addrman.size(), 0);
  91     CAddrInfo addr_null = addrman.Select();
  92     BOOST_CHECK_EQUAL(addr_null.ToString(), "[::]:0");
  93
  94     // Test: Does Addrman::Add work as expected.
  95     CService addr1 = ResolveService("250.1.1.1", 8333);
  96     BOOST_CHECK(addrman.Add(CAddress(addr1, NODE_NONE), source));
  97     BOOST_CHECK_EQUAL(addrman.size(), 1);
  98     CAddrInfo addr_ret1 = addrman.Select();
  99     BOOST_CHECK_EQUAL(addr_ret1.ToString(), "250.1.1.1:8333");
 100
 101     // Test: Does IP address deduplication work correctly.
 102     //  Expected dup IP should not be added.
 103     CService addr1_dup = ResolveService("250.1.1.1", 8333);
 104     BOOST_CHECK(!addrman.Add(CAddress(addr1_dup, NODE_NONE), source));
 105     BOOST_CHECK_EQUAL(addrman.size(), 1);
 106
 107
 108     // Test: New table has one addr and we add a diff addr we should
 109     //  have at least one addr.
 110     // Note that addrman's size cannot be tested reliably after insertion, as
 111     // hash collisions may occur. But we can always be sure of at least one
 112     // success.
 113
 114     CService addr2 = ResolveService("250.1.1.2", 8333);
 115     BOOST_CHECK(addrman.Add(CAddress(addr2, NODE_NONE), source));
 116     BOOST_CHECK(addrman.size() >= 1);
 117
 118     // Test: AddrMan::Clear() should empty the new table.
 119     addrman.Clear();
 120     BOOST_CHECK_EQUAL(addrman.size(), 0);
 121     CAddrInfo addr_null2 = addrman.Select();
 122     BOOST_CHECK_EQUAL(addr_null2.ToString(), "[::]:0");
 123
 124     // Test: AddrMan::Add multiple addresses works as expected
 125     std::vector<CAddress> vAddr;
 126     vAddr.push_back(CAddress(ResolveService("250.1.1.3", 8333), NODE_NONE));
 127     vAddr.push_back(CAddress(ResolveService("250.1.1.4", 8333), NODE_NONE));
 128     BOOST_CHECK(addrman.Add(vAddr, source));
 129     BOOST_CHECK(addrman.size() >= 1);
 130 }
 131
 132 BOOST_AUTO_TEST_CASE(addrman_ports)
 133 {
 134     CAddrManTest addrman;
 135
 136     CNetAddr source = ResolveIP("252.2.2.2");
 137
 138     BOOST_CHECK_EQUAL(addrman.size(), 0);
 139
 140     // Test 7; Addr with same IP but diff port does not replace existing addr.
 141     CService addr1 = ResolveService("250.1.1.1", 8333);
 142     addrman.Add(CAddress(addr1, NODE_NONE), source);
 143     BOOST_CHECK_EQUAL(addrman.size(), 1);
 144
 145     CService addr1_port = ResolveService("250.1.1.1", 8334);
 146     addrman.Add(CAddress(addr1_port, NODE_NONE), source);
 147     BOOST_CHECK_EQUAL(addrman.size(), 1);
 148     CAddrInfo addr_ret2 = addrman.Select();
 149     BOOST_CHECK_EQUAL(addr_ret2.ToString(), "250.1.1.1:8333");
 150
 151     // Test: Add same IP but diff port to tried table, it doesn't get added.
 152     //  Perhaps this is not ideal behavior but it is the current behavior.
 153     addrman.Good(CAddress(addr1_port, NODE_NONE));
 154     BOOST_CHECK_EQUAL(addrman.size(), 1);
 155     bool newOnly = true;
 156     CAddrInfo addr_ret3 = addrman.Select(newOnly);
 157     BOOST_CHECK_EQUAL(addr_ret3.ToString(), "250.1.1.1:8333");
 158 }
 159
 160
 161 BOOST_AUTO_TEST_CASE(addrman_select)
 162 {
 163     CAddrManTest addrman;
 164
 165     CNetAddr source = ResolveIP("252.2.2.2");
 166
 167     // Test: Select from new with 1 addr in new.
 168     CService addr1 = ResolveService("250.1.1.1", 8333);
 169     addrman.Add(CAddress(addr1, NODE_NONE), source);
 170     BOOST_CHECK_EQUAL(addrman.size(), 1);
 171
 172     bool newOnly = true;
 173     CAddrInfo addr_ret1 = addrman.Select(newOnly);
 174     BOOST_CHECK_EQUAL(addr_ret1.ToString(), "250.1.1.1:8333");
 175
 176     // Test: move addr to tried, select from new expected nothing returned.
 177     addrman.Good(CAddress(addr1, NODE_NONE));
 178     BOOST_CHECK_EQUAL(addrman.size(), 1);
 179     CAddrInfo addr_ret2 = addrman.Select(newOnly);
 180     BOOST_CHECK_EQUAL(addr_ret2.ToString(), "[::]:0");
 181
 182     CAddrInfo addr_ret3 = addrman.Select();
 183     BOOST_CHECK_EQUAL(addr_ret3.ToString(), "250.1.1.1:8333");
 184
 185     BOOST_CHECK_EQUAL(addrman.size(), 1);
 186
 187
 188     // Add three addresses to new table.
 189     CService addr2 = ResolveService("250.3.1.1", 8333);
 190     CService addr3 = ResolveService("250.3.2.2", 9999);
 191     CService addr4 = ResolveService("250.3.3.3", 9999);
 192
 193     addrman.Add(CAddress(addr2, NODE_NONE), ResolveService("250.3.1.1", 8333));
 194     addrman.Add(CAddress(addr3, NODE_NONE), ResolveService("250.3.1.1", 8333));
 195     addrman.Add(CAddress(addr4, NODE_NONE), ResolveService("250.4.1.1", 8333));
 196
 197     // Add three addresses to tried table.
 198     CService addr5 = ResolveService("250.4.4.4", 8333);
 199     CService addr6 = ResolveService("250.4.5.5", 7777);
 200     CService addr7 = ResolveService("250.4.6.6", 8333);
 201
 202     addrman.Add(CAddress(addr5, NODE_NONE), ResolveService("250.3.1.1", 8333));
 203     addrman.Good(CAddress(addr5, NODE_NONE));
 204     addrman.Add(CAddress(addr6, NODE_NONE), ResolveService("250.3.1.1", 8333));
 205     addrman.Good(CAddress(addr6, NODE_NONE));
 206     addrman.Add(CAddress(addr7, NODE_NONE), ResolveService("250.1.1.3", 8333));
 207     addrman.Good(CAddress(addr7, NODE_NONE));
 208
 209     // Test: 6 addrs + 1 addr from last test = 7.
 210     BOOST_CHECK_EQUAL(addrman.size(), 7);
 211
 212     // Test: Select pulls from new and tried regardless of port number.
 213     std::set<uint16_t> ports;
 214     for (int i = 0; i < 20; ++i) {
 215         ports.insert(addrman.Select().GetPort());
 216     }
 217     BOOST_CHECK_EQUAL(ports.size(), 3);
 218 }
 219
 220 BOOST_AUTO_TEST_CASE(addrman_new_collisions)
 221 {
 222     CAddrManTest addrman;
 223
 224     CNetAddr source = ResolveIP("252.2.2.2");
 225
 226     BOOST_CHECK_EQUAL(addrman.size(), 0);
 227
 228     for (unsigned int i = 1; i < 18; i++) {
 229         CService addr = ResolveService("250.1.1." + boost::to_string(i));
 230         addrman.Add(CAddress(addr, NODE_NONE), source);
 231
 232         //Test: No collision in new table yet.
 233         BOOST_CHECK_EQUAL(addrman.size(), i);
 234     }
 235
 236     //Test: new table collision!
 237     CService addr1 = ResolveService("250.1.1.18");
 238     addrman.Add(CAddress(addr1, NODE_NONE), source);
 239     BOOST_CHECK_EQUAL(addrman.size(), 17);
 240
 241     CService addr2 = ResolveService("250.1.1.19");
 242     addrman.Add(CAddress(addr2, NODE_NONE), source);
 243     BOOST_CHECK_EQUAL(addrman.size(), 18);
 244 }
 245
 246 BOOST_AUTO_TEST_CASE(addrman_tried_collisions)
 247 {
 248     CAddrManTest addrman;
 249
 250     CNetAddr source = ResolveIP("252.2.2.2");
 251
 252     BOOST_CHECK_EQUAL(addrman.size(), 0);
 253
 254     for (unsigned int i = 1; i < 80; i++) {
 255         CService addr = ResolveService("250.1.1." + boost::to_string(i));
 256         addrman.Add(CAddress(addr, NODE_NONE), source);
 257         addrman.Good(CAddress(addr, NODE_NONE));
 258
 259         //Test: No collision in tried table yet.
 260         BOOST_CHECK_EQUAL(addrman.size(), i);
 261     }
 262
 263     //Test: tried table collision!
 264     CService addr1 = ResolveService("250.1.1.80");
 265     addrman.Add(CAddress(addr1, NODE_NONE), source);
 266     BOOST_CHECK_EQUAL(addrman.size(), 79);
 267
 268     CService addr2 = ResolveService("250.1.1.81");
 269     addrman.Add(CAddress(addr2, NODE_NONE), source);
 270     BOOST_CHECK_EQUAL(addrman.size(), 80);
 271 }
 272
 273 BOOST_AUTO_TEST_CASE(addrman_find)
 274 {
 275     CAddrManTest addrman;
 276
 277     BOOST_CHECK_EQUAL(addrman.size(), 0);
 278
 279     CAddress addr1 = CAddress(ResolveService("250.1.2.1", 8333), NODE_NONE);
 280     CAddress addr2 = CAddress(ResolveService("250.1.2.1", 9999), NODE_NONE);
 281     CAddress addr3 = CAddress(ResolveService("251.255.2.1", 8333), NODE_NONE);
 282
 283     CNetAddr source1 = ResolveIP("250.1.2.1");
 284     CNetAddr source2 = ResolveIP("250.1.2.2");
 285
 286     addrman.Add(addr1, source1);
 287     addrman.Add(addr2, source2);
 288     addrman.Add(addr3, source1);
 289
 290     // Test: ensure Find returns an IP matching what we searched on.
 291     CAddrInfo* info1 = addrman.Find(addr1);
 292     BOOST_REQUIRE(info1);
 293     BOOST_CHECK_EQUAL(info1->ToString(), "250.1.2.1:8333");
 294
 295     // Test 18; Find does not discriminate by port number.
 296     CAddrInfo* info2 = addrman.Find(addr2);
 297     BOOST_REQUIRE(info2);
 298     BOOST_CHECK_EQUAL(info2->ToString(), info1->ToString());
 299
 300     // Test: Find returns another IP matching what we searched on.
 301     CAddrInfo* info3 = addrman.Find(addr3);
 302     BOOST_REQUIRE(info3);
 303     BOOST_CHECK_EQUAL(info3->ToString(), "251.255.2.1:8333");
 304 }
 305
 306 BOOST_AUTO_TEST_CASE(addrman_create)
 307 {
 308     CAddrManTest addrman;
 309
 310     BOOST_CHECK_EQUAL(addrman.size(), 0);
 311
 312     CAddress addr1 = CAddress(ResolveService("250.1.2.1", 8333), NODE_NONE);
 313     CNetAddr source1 = ResolveIP("250.1.2.1");
 314
 315     int nId;
 316     CAddrInfo* pinfo = addrman.Create(addr1, source1, &nId);
 317
 318     // Test: The result should be the same as the input addr.
 319     BOOST_CHECK_EQUAL(pinfo->ToString(), "250.1.2.1:8333");
 320
 321     CAddrInfo* info2 = addrman.Find(addr1);
 322     BOOST_CHECK_EQUAL(info2->ToString(), "250.1.2.1:8333");
 323 }
 324
 325
 326 BOOST_AUTO_TEST_CASE(addrman_delete)
 327 {
 328     CAddrManTest addrman;
 329
 330     BOOST_CHECK_EQUAL(addrman.size(), 0);
 331
 332     CAddress addr1 = CAddress(ResolveService("250.1.2.1", 8333), NODE_NONE);
 333     CNetAddr source1 = ResolveIP("250.1.2.1");
 334
 335     int nId;
 336     addrman.Create(addr1, source1, &nId);
 337
 338     // Test: Delete should actually delete the addr.
 339     BOOST_CHECK_EQUAL(addrman.size(), 1);
 340     addrman.Delete(nId);
 341     BOOST_CHECK_EQUAL(addrman.size(), 0);
 342     CAddrInfo* info2 = addrman.Find(addr1);
 343     BOOST_CHECK(info2 == nullptr);
 344 }
 345
 346 BOOST_AUTO_TEST_CASE(addrman_getaddr)
 347 {
 348     CAddrManTest addrman;
 349
 350     // Test: Sanity check, GetAddr should never return anything if addrman
 351     //  is empty.
 352     BOOST_CHECK_EQUAL(addrman.size(), 0);
 353     std::vector<CAddress> vAddr1 = addrman.GetAddr();
 354     BOOST_CHECK_EQUAL(vAddr1.size(), 0);
 355
 356     CAddress addr1 = CAddress(ResolveService("250.250.2.1", 8333), NODE_NONE);
 357     addr1.nTime = GetAdjustedTime(); // Set time so isTerrible = false
 358     CAddress addr2 = CAddress(ResolveService("250.251.2.2", 9999), NODE_NONE);
 359     addr2.nTime = GetAdjustedTime();
 360     CAddress addr3 = CAddress(ResolveService("251.252.2.3", 8333), NODE_NONE);
 361     addr3.nTime = GetAdjustedTime();
 362     CAddress addr4 = CAddress(ResolveService("252.253.3.4", 8333), NODE_NONE);
 363     addr4.nTime = GetAdjustedTime();
 364     CAddress addr5 = CAddress(ResolveService("252.254.4.5", 8333), NODE_NONE);
 365     addr5.nTime = GetAdjustedTime();
 366     CNetAddr source1 = ResolveIP("250.1.2.1");
 367     CNetAddr source2 = ResolveIP("250.2.3.3");
 368
 369     // Test: Ensure GetAddr works with new addresses.
 370     addrman.Add(addr1, source1);
 371     addrman.Add(addr2, source2);
 372     addrman.Add(addr3, source1);
 373     addrman.Add(addr4, source2);
 374     addrman.Add(addr5, source1);
 375
 376     // GetAddr returns 23% of addresses, 23% of 5 is 1 rounded down.
 377     BOOST_CHECK_EQUAL(addrman.GetAddr().size(), 1);
 378
 379     // Test: Ensure GetAddr works with new and tried addresses.
 380     addrman.Good(CAddress(addr1, NODE_NONE));
 381     addrman.Good(CAddress(addr2, NODE_NONE));
 382     BOOST_CHECK_EQUAL(addrman.GetAddr().size(), 1);
 383
 384     // Test: Ensure GetAddr still returns 23% when addrman has many addrs.
 385     for (unsigned int i = 1; i < (8 * 256); i++) {
 386         int octet1 = i % 256;
 387         int octet2 = i >> 8 % 256;
 388         std::string strAddr = boost::to_string(octet1) + "." + boost::to_string(octet2) + ".1.23";
 389         CAddress addr = CAddress(ResolveService(strAddr), NODE_NONE);
 390
 391         // Ensure that for all addrs in addrman, isTerrible == false.
 392         addr.nTime = GetAdjustedTime();
 393         addrman.Add(addr, ResolveIP(strAddr));
 394         if (i % 8 == 0)
 395             addrman.Good(addr);
 396     }
 397     std::vector<CAddress> vAddr = addrman.GetAddr();
 398
 399     size_t percent23 = (addrman.size() * 23) / 100;
 400     BOOST_CHECK_EQUAL(vAddr.size(), percent23);
 401     BOOST_CHECK_EQUAL(vAddr.size(), 461);
 402     // (Addrman.size() < number of addresses added) due to address collisions.
 403     BOOST_CHECK_EQUAL(addrman.size(), 2006);
 404 }
 405
 406
 407 BOOST_AUTO_TEST_CASE(caddrinfo_get_tried_bucket)
 408 {
 409     CAddrManTest addrman;
 410
 411     CAddress addr1 = CAddress(ResolveService("250.1.1.1", 8333), NODE_NONE);
 412     CAddress addr2 = CAddress(ResolveService("250.1.1.1", 9999), NODE_NONE);
 413
 414     CNetAddr source1 = ResolveIP("250.1.1.1");
 415
 416
 417     CAddrInfo info1 = CAddrInfo(addr1, source1);
 418
 419     uint256 nKey1 = (uint256)(CHashWriter(SER_GETHASH, 0) << 1).GetHash();
 420     uint256 nKey2 = (uint256)(CHashWriter(SER_GETHASH, 0) << 2).GetHash();
 421
 422
 423     BOOST_CHECK_EQUAL(info1.GetTriedBucket(nKey1), 40);
 424
 425     // Test: Make sure key actually randomizes bucket placement. A fail on
 426     //  this test could be a security issue.
 427     BOOST_CHECK(info1.GetTriedBucket(nKey1) != info1.GetTriedBucket(nKey2));
 428
 429     // Test: Two addresses with same IP but different ports can map to
 430     //  different buckets because they have different keys.
 431     CAddrInfo info2 = CAddrInfo(addr2, source1);
 432
 433     BOOST_CHECK(info1.GetKey() != info2.GetKey());
 434     BOOST_CHECK(info1.GetTriedBucket(nKey1) != info2.GetTriedBucket(nKey1));
 435
 436     std::set<int> buckets;
 437     for (int i = 0; i < 255; i++) {
 438         CAddrInfo infoi = CAddrInfo(
 439             CAddress(ResolveService("250.1.1." + boost::to_string(i)), NODE_NONE),
 440             ResolveIP("250.1.1." + boost::to_string(i)));
 441         int bucket = infoi.GetTriedBucket(nKey1);
 442         buckets.insert(bucket);
 443     }
 444     // Test: IP addresses in the same group (\16 prefix for IPv4) should
 445     //  never get more than 8 buckets
 446     BOOST_CHECK_EQUAL(buckets.size(), 8);
 447
 448     buckets.clear();
 449     for (int j = 0; j < 255; j++) {
 450         CAddrInfo infoj = CAddrInfo(
 451             CAddress(ResolveService("250." + boost::to_string(j) + ".1.1"), NODE_NONE),
 452             ResolveIP("250." + boost::to_string(j) + ".1.1"));
 453         int bucket = infoj.GetTriedBucket(nKey1);
 454         buckets.insert(bucket);
 455     }
 456     // Test: IP addresses in the different groups should map to more than
 457     //  8 buckets.
 458     BOOST_CHECK_EQUAL(buckets.size(), 160);
 459 }
 460
 461 BOOST_AUTO_TEST_CASE(caddrinfo_get_new_bucket)
 462 {
 463     CAddrManTest addrman;
 464
 465     CAddress addr1 = CAddress(ResolveService("250.1.2.1", 8333), NODE_NONE);
 466     CAddress addr2 = CAddress(ResolveService("250.1.2.1", 9999), NODE_NONE);
 467
 468     CNetAddr source1 = ResolveIP("250.1.2.1");
 469
 470     CAddrInfo info1 = CAddrInfo(addr1, source1);
 471
 472     uint256 nKey1 = (uint256)(CHashWriter(SER_GETHASH, 0) << 1).GetHash();
 473     uint256 nKey2 = (uint256)(CHashWriter(SER_GETHASH, 0) << 2).GetHash();
 474
 475     // Test: Make sure the buckets are what we expect
 476     BOOST_CHECK_EQUAL(info1.GetNewBucket(nKey1), 786);
 477     BOOST_CHECK_EQUAL(info1.GetNewBucket(nKey1, source1), 786);
 478
 479     // Test: Make sure key actually randomizes bucket placement. A fail on
 480     //  this test could be a security issue.
 481     BOOST_CHECK(info1.GetNewBucket(nKey1) != info1.GetNewBucket(nKey2));
 482
 483     // Test: Ports should not effect bucket placement in the addr
 484     CAddrInfo info2 = CAddrInfo(addr2, source1);
 485     BOOST_CHECK(info1.GetKey() != info2.GetKey());
 486     BOOST_CHECK_EQUAL(info1.GetNewBucket(nKey1), info2.GetNewBucket(nKey1));
 487
 488     std::set<int> buckets;
 489     for (int i = 0; i < 255; i++) {
 490         CAddrInfo infoi = CAddrInfo(
 491             CAddress(ResolveService("250.1.1." + boost::to_string(i)), NODE_NONE),
 492             ResolveIP("250.1.1." + boost::to_string(i)));
 493         int bucket = infoi.GetNewBucket(nKey1);
 494         buckets.insert(bucket);
 495     }
 496     // Test: IP addresses in the same group (\16 prefix for IPv4) should
 497     //  always map to the same bucket.
 498     BOOST_CHECK_EQUAL(buckets.size(), 1);
 499
 500     buckets.clear();
 501     for (int j = 0; j < 4 * 255; j++) {
 502         CAddrInfo infoj = CAddrInfo(CAddress(
 503                                         ResolveService(
 504                                             boost::to_string(250 + (j / 255)) + "." + boost::to_string(j % 256) + ".1.1"), NODE_NONE),
 505             ResolveIP("251.4.1.1"));
 506         int bucket = infoj.GetNewBucket(nKey1);
 507         buckets.insert(bucket);
 508     }
 509     // Test: IP addresses in the same source groups should map to no more
 510     //  than 64 buckets.
 511     BOOST_CHECK(buckets.size() <= 64);
 512
 513     buckets.clear();
 514     for (int p = 0; p < 255; p++) {
 515         CAddrInfo infoj = CAddrInfo(
 516             CAddress(ResolveService("250.1.1.1"), NODE_NONE),
 517             ResolveIP("250." + boost::to_string(p) + ".1.1"));
 518         int bucket = infoj.GetNewBucket(nKey1);
 519         buckets.insert(bucket);
 520     }
 521     // Test: IP addresses in the different source groups should map to more
 522     //  than 64 buckets.
 523     BOOST_CHECK(buckets.size() > 64);
 524 }
 525 BOOST_AUTO_TEST_SUITE_END()