src/dht/test_dht_topo.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2012 Christian Grothoff (and other contributing authors)
   4
   5      GNUnet is free software; you can redistribute it and/or modify
   6      it under the terms of the GNU General Public License as published
   7      by the Free Software Foundation; either version 3, or (at your
   8      option) any later version.
   9
  10      GNUnet is distributed in the hope that it will be useful, but
  11      WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13      General Public License for more details.
  14
  15      You should have received a copy of the GNU General Public License
  16      along with GNUnet; see the file COPYING.  If not, write to the
  17      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18      Boston, MA 02111-1307, USA.
  19 */
  20 /**
  21  * @file dht/test_dht_topo.c
  22  *
  23  * @brief Test for the dht service: store and retrieve in various topologies.
  24  * Each peer stores it own ID in the DHT and then a different peer tries to
  25  * retrieve that key from it. The GET starts after a first round of PUTS has
  26  * been made. Periodically, each peer stores its ID into the DHT. If after
  27  * a timeout no result has been returned, the test fails.
  28  */
  29 #include "platform.h"
  30 #include "gnunet_testing_lib.h"
  31 #include "gnunet_dht_service.h"
  32
  33 #define VERBOSE GNUNET_NO
  34
  35 #define REMOVE_DIR GNUNET_YES
  36
  37 /**
  38  * DIFFERENT TESTS TO RUN
  39  */
  40 #define LINE 0
  41 #define TORUS 1
  42
  43 /**
  44  * How long until we give up on connecting the peers?
  45  */
  46 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1500)
  47
  48 #define GET_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 120)
  49
  50 #define PUT_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
  51
  52 /**
  53  * Result of the test.
  54  */
  55 static int ok;
  56
  57 /**
  58  * Be verbose
  59  */
  60 static int verbose;
  61
  62 /**
  63  * Total number of peers in the test.
  64  */
  65 static unsigned long long num_peers;
  66
  67 /**
  68  * Global configuration file
  69  */
  70 static struct GNUNET_CONFIGURATION_Handle *testing_cfg;
  71
  72 /**
  73  * Total number of currently running peers.
  74  */
  75 static unsigned long long peers_running;
  76
  77 /**
  78  * Total number of connections in the whole network.
  79  */
  80 static unsigned int total_connections;
  81
  82 /**
  83  * The currently running peer group.
  84  */
  85 static struct GNUNET_TESTING_PeerGroup *pg;
  86
  87 /**
  88  * File to report results to.
  89  */
  90 static struct GNUNET_DISK_FileHandle *output_file;
  91
  92 /**
  93  * File to log connection info, statistics to.
  94  */
  95 static struct GNUNET_DISK_FileHandle *data_file;
  96
  97 /**
  98  * Task called to disconnect peers.
  99  */
 100 static GNUNET_SCHEDULER_TaskIdentifier disconnect_task;
 101
 102 /**
 103  * Task To perform tests
 104  */
 105 static GNUNET_SCHEDULER_TaskIdentifier test_task;
 106
 107 /**
 108  * Task to do DHT_puts
 109  */
 110 static GNUNET_SCHEDULER_TaskIdentifier put_task;
 111
 112 /**
 113  * Task called to shutdown test.
 114  */
 115 static GNUNET_SCHEDULER_TaskIdentifier shutdown_handle;
 116
 117 static char *topology_file;
 118
 119 struct GNUNET_TESTING_Daemon *d1;
 120
 121 struct GNUNET_TESTING_Daemon *d2;
 122
 123 struct GNUNET_DHT_Handle **hs;
 124
 125 struct GNUNET_DHT_GetHandle *get_h;
 126
 127 struct GNUNET_DHT_GetHandle *get_h_2;
 128
 129 struct GNUNET_DHT_GetHandle *get_h_far;
 130
 131 unsigned int found;
 132
 133 /**
 134  * Which topology are we to run
 135  */
 136 static int test_topology;
 137
 138 /**
 139  * Check whether peers successfully shut down.
 140  */
 141 static void
 142 shutdown_callback (void *cls, const char *emsg)
 143 {
 144   if (emsg != NULL)
 145   {
 146 #if VERBOSE
 147     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: Shutdown of peers failed!\n");
 148 #endif
 149     ok++;
 150   }
 151   else
 152   {
 153 #if VERBOSE
 154     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 155                 "test: All peers successfully shut down!\n");
 156 #endif
 157   }
 158   GNUNET_CONFIGURATION_destroy (testing_cfg);
 159 }
 160
 161
 162 static void
 163 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 164 {
 165 #if VERBOSE
 166   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: Ending test.\n");
 167 #endif
 168
 169   if (disconnect_task != GNUNET_SCHEDULER_NO_TASK)
 170   {
 171     GNUNET_SCHEDULER_cancel (disconnect_task);
 172     disconnect_task = GNUNET_SCHEDULER_NO_TASK;
 173   }
 174
 175   if (data_file != NULL)
 176     GNUNET_DISK_file_close (data_file);
 177   GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
 178 }
 179
 180
 181 static void
 182 disconnect_peers (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 183 {
 184   unsigned int i;
 185
 186   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: disconnecting peers\n");
 187   disconnect_task = GNUNET_SCHEDULER_NO_TASK;
 188   GNUNET_SCHEDULER_cancel (put_task);
 189   if (NULL != get_h)
 190     GNUNET_DHT_get_stop (get_h);
 191   if (NULL != get_h_2)
 192     GNUNET_DHT_get_stop (get_h_2);
 193   if (NULL != get_h_far)
 194     GNUNET_DHT_get_stop (get_h_far);
 195   for (i = 0; i < num_peers; i++)
 196   {
 197     GNUNET_DHT_disconnect (hs[i]);
 198   }
 199   GNUNET_SCHEDULER_cancel (shutdown_handle);
 200   shutdown_handle = GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
 201 }
 202
 203 static void
 204 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
 205                     const GNUNET_HashCode * key,
 206                     const struct GNUNET_PeerIdentity *get_path,
 207                     unsigned int get_path_length,
 208                     const struct GNUNET_PeerIdentity *put_path,
 209                     unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
 210                     size_t size, const void *data)
 211 {
 212   int i;
 213
 214   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
 215               "test: ************* FOUND!!! ***********\n");
 216   if (sizeof (GNUNET_HashCode) == size)
 217   {
 218     const GNUNET_HashCode *h = data;
 219
 220     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   Contents: %s\n",
 221                 GNUNET_h2s_full (h));
 222
 223   }
 224   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: PATH: (get %u, put %u)\n",
 225               get_path_length, put_path_length);
 226   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   LOCAL\n");
 227   for (i = get_path_length - 1; i >= 0; i--)
 228   {
 229     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   %s\n",
 230                 GNUNET_i2s (&get_path[i]));
 231   }
 232   for (i = put_path_length - 1; i >= 0; i--)
 233   {
 234     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   %s\n",
 235                 GNUNET_i2s (&put_path[i]));
 236   }
 237   found++;
 238   if (TORUS == test_topology && found < 3)
 239     return;
 240   ok = 0;
 241   GNUNET_SCHEDULER_cancel (disconnect_task);
 242   disconnect_task = GNUNET_SCHEDULER_add_now (&disconnect_peers, NULL);
 243 }
 244
 245 static void
 246 do_test (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 247 {
 248   struct GNUNET_TESTING_Daemon *d;
 249   struct GNUNET_TESTING_Daemon *d2;
 250   struct GNUNET_TESTING_Daemon *d_far;
 251   struct GNUNET_TESTING_Daemon *o;
 252   struct GNUNET_TESTING_Daemon *aux;
 253   const char *id_aux;
 254   const char *id_origin = "FC74";
 255   const char *id_near = "9P6V";
 256   const char *id_near2 = "2GDS";
 257   const char *id_far = "KPST";
 258   unsigned int i;
 259
 260   d = d2 = d_far = o = NULL;
 261   if (LINE == test_topology)
 262   {
 263     o = GNUNET_TESTING_daemon_get (pg, 0);
 264     d = GNUNET_TESTING_daemon_get (pg, 4);
 265   }
 266   else if (TORUS == test_topology)
 267   {
 268     for (i = 0; i < num_peers; i++)
 269     {
 270       aux = GNUNET_TESTING_daemon_get (pg, i);
 271       id_aux = GNUNET_i2s (&aux->id);
 272       if (strcmp (id_aux, id_origin) == 0)
 273         o = aux;
 274       if (strcmp (id_aux, id_far) == 0)
 275         d_far = aux;
 276       if (strcmp (id_aux, id_near) == 0)
 277         d = aux;
 278       if (strcmp (id_aux, id_near2) == 0)
 279         d2 = aux;
 280     }
 281     if ((NULL == o) || (NULL == d) || (NULL == d2) || (NULL == d_far))
 282     {
 283       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 284                   "test: Peers not found (hostkey file changed?)\n");
 285       GNUNET_SCHEDULER_cancel (disconnect_task);
 286       disconnect_task = GNUNET_SCHEDULER_add_now (&disconnect_peers, NULL);
 287       return;
 288     }
 289   }
 290   else
 291   {
 292     GNUNET_assert (0);
 293   }
 294   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: test_task\ntest:   from %s\n",
 295               GNUNET_h2s_full (&o->id.hashPubKey));
 296   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   looking for %s\n",
 297               GNUNET_h2s_full (&d->id.hashPubKey));
 298   found = 0;
 299   get_h = GNUNET_DHT_get_start (hs[0], GNUNET_TIME_UNIT_FOREVER_REL,    /* timeout */
 300                                 GNUNET_BLOCK_TYPE_TEST, /* type */
 301                                 &d->id.hashPubKey,      /*key to search */
 302                                 4U,     /* replication level */
 303                                 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL,        /* xquery */
 304                                 0,      /* xquery bits */
 305                                 &dht_get_id_handler, NULL);
 306   if (TORUS == test_topology)
 307   {
 308     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   looking for %s\n",
 309                 GNUNET_h2s_full (&d2->id.hashPubKey));
 310     get_h_2 = GNUNET_DHT_get_start (hs[0], GNUNET_TIME_UNIT_FOREVER_REL,  /* timeout */
 311                                     GNUNET_BLOCK_TYPE_TEST,       /* type */
 312                                     &d2->id.hashPubKey,   /*key to search */
 313                                     4U,   /* replication level */
 314                                     GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL,      /* xquery */
 315                                     0,    /* xquery bits */
 316                                     &dht_get_id_handler, NULL);
 317     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:   looking for %s\n",
 318                 GNUNET_h2s_full (&d_far->id.hashPubKey));
 319     get_h_far = GNUNET_DHT_get_start (hs[0], GNUNET_TIME_UNIT_FOREVER_REL,        /* timeout */
 320                                       GNUNET_BLOCK_TYPE_TEST,     /* type */
 321                                       &d_far->id.hashPubKey,      /*key to search */
 322                                       4U, /* replication level */
 323                                       GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL,    /* xquery */
 324                                       0,  /* xquery bits */
 325                                       &dht_get_id_handler, NULL);
 326   }
 327   GNUNET_SCHEDULER_cancel (disconnect_task);
 328   disconnect_task =
 329       GNUNET_SCHEDULER_add_delayed (GET_TIMEOUT, &disconnect_peers, NULL);
 330 }
 331
 332 /**
 333  * Task to put the id of each peer into teh DHT.
 334  *
 335  * @param cls Closure (unused)
 336  * @param tc Task context
 337  *
 338  */
 339 static void
 340 put_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 341 {
 342   struct GNUNET_TESTING_Daemon *d;
 343   unsigned int i;
 344
 345   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: putting id's in DHT\n");
 346   for (i = 0; i < num_peers; i++)
 347   {
 348     d = GNUNET_TESTING_daemon_get (pg, i);
 349     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test:    putting into DHT: %s\n",
 350                 GNUNET_h2s_full (&d->id.hashPubKey));
 351     GNUNET_DHT_put (hs[i], &d->id.hashPubKey, 10U,
 352                     GNUNET_DHT_RO_RECORD_ROUTE |
 353                     GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
 354                     GNUNET_BLOCK_TYPE_TEST, sizeof (struct GNUNET_PeerIdentity),
 355                     (const char *) &d->id, GNUNET_TIME_UNIT_FOREVER_ABS,
 356                     GNUNET_TIME_UNIT_FOREVER_REL, NULL, NULL);
 357
 358   }
 359   put_task = GNUNET_SCHEDULER_add_delayed (PUT_FREQUENCY, &put_id, NULL);
 360   if (GNUNET_SCHEDULER_NO_TASK == test_task)
 361     test_task = GNUNET_SCHEDULER_add_now (&do_test, NULL);
 362 }
 363
 364
 365 /**
 366  * peergroup_ready: start test when all peers are connected
 367  *
 368  * @param cls closure
 369  * @param emsg error message
 370  *
 371  */
 372 static void
 373 peergroup_ready (void *cls, const char *emsg)
 374 {
 375   struct GNUNET_TESTING_Daemon *d;
 376   char *buf;
 377   int buf_len;
 378   unsigned int i;
 379
 380   if (emsg != NULL)
 381   {
 382     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 383                 "test: Peergroup callback called with error, aborting test!\n");
 384     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: Error from testing: `%s'\n",
 385                 emsg);
 386     ok++;
 387     GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
 388     return;
 389   }
 390 #if VERBOSE
 391   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 392               "************************************************************\n");
 393   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 394               "test: Peer Group started successfully!\n");
 395   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: Have %u connections\n",
 396               total_connections);
 397 #endif
 398
 399   if (data_file != NULL)
 400   {
 401     buf = NULL;
 402     buf_len = GNUNET_asprintf (&buf, "CONNECTIONS_0: %u\n", total_connections);
 403     if (buf_len > 0)
 404       GNUNET_DISK_file_write (data_file, buf, buf_len);
 405     GNUNET_free (buf);
 406   }
 407   peers_running = GNUNET_TESTING_daemons_running (pg);
 408
 409   GNUNET_assert (peers_running == num_peers);
 410   hs = GNUNET_malloc (num_peers * sizeof (struct GNUNET_DHT_Handle *));
 411   for (i = 0; i < num_peers; i++)
 412   {
 413     d = GNUNET_TESTING_daemon_get (pg, i);
 414     hs[i] = GNUNET_DHT_connect (d->cfg, 32);
 415   }
 416
 417   test_task = GNUNET_SCHEDULER_NO_TASK;
 418   put_task = GNUNET_SCHEDULER_add_now (&put_id, NULL);
 419   disconnect_task =
 420       GNUNET_SCHEDULER_add_delayed (GET_TIMEOUT, &disconnect_peers, NULL);
 421
 422 }
 423
 424
 425 /**
 426  * Function that will be called whenever two daemons are connected by
 427  * the testing library.
 428  *
 429  * @param cls closure
 430  * @param first peer id for first daemon
 431  * @param second peer id for the second daemon
 432  * @param distance distance between the connected peers
 433  * @param first_cfg config for the first daemon
 434  * @param second_cfg config for the second daemon
 435  * @param first_daemon handle for the first daemon
 436  * @param second_daemon handle for the second daemon
 437  * @param emsg error message (NULL on success)
 438  */
 439 static void
 440 connect_cb (void *cls, const struct GNUNET_PeerIdentity *first,
 441             const struct GNUNET_PeerIdentity *second, uint32_t distance,
 442             const struct GNUNET_CONFIGURATION_Handle *first_cfg,
 443             const struct GNUNET_CONFIGURATION_Handle *second_cfg,
 444             struct GNUNET_TESTING_Daemon *first_daemon,
 445             struct GNUNET_TESTING_Daemon *second_daemon, const char *emsg)
 446 {
 447
 448   if (emsg == NULL)
 449   {
 450     total_connections++;
 451     GNUNET_PEER_intern (first);
 452     GNUNET_PEER_intern (second);
 453   }
 454   else
 455   {
 456     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 457                 "test: Problem with new connection (%s)\n", emsg);
 458   }
 459
 460 }
 461
 462
 463 /**
 464  * run: load configuration options and schedule test to run (start peergroup)
 465  * @param cls closure
 466  * @param args argv
 467  * @param cfgfile configuration file name (can be NULL)
 468  * @param cfg configuration handle
 469  */
 470 static void
 471 run (void *cls, char *const *args, const char *cfgfile,
 472      const struct GNUNET_CONFIGURATION_Handle *cfg)
 473 {
 474   char *temp_str;
 475   struct GNUNET_TESTING_Host *hosts;
 476   char *data_filename;
 477
 478   ok = 1;
 479   testing_cfg = GNUNET_CONFIGURATION_dup (cfg);
 480
 481   GNUNET_log_setup ("test_dht_topo",
 482 #if VERBOSE
 483                     "DEBUG",
 484 #else
 485                     "WARNING",
 486 #endif
 487                     NULL);
 488
 489 #if VERBOSE
 490   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test: Starting daemons.\n");
 491   GNUNET_CONFIGURATION_set_value_string (testing_cfg, "testing",
 492                                          "use_progressbars", "YES");
 493 #endif
 494
 495   if (GNUNET_OK !=
 496       GNUNET_CONFIGURATION_get_value_number (testing_cfg, "testing",
 497                                              "num_peers", &num_peers))
 498   {
 499     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 500                 "Option TESTING:NUM_PEERS is required!\n");
 501     return;
 502   }
 503
 504   if (GNUNET_OK !=
 505       GNUNET_CONFIGURATION_get_value_string (testing_cfg, "testing",
 506                                              "topology_output_file",
 507                                              &topology_file))
 508   {
 509     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 510                 "Option test_dht_topo:topology_output_file is required!\n");
 511     return;
 512   }
 513
 514   if (GNUNET_OK ==
 515       GNUNET_CONFIGURATION_get_value_string (testing_cfg, "test_dht_topo",
 516                                              "data_output_file",
 517                                              &data_filename))
 518   {
 519     data_file =
 520         GNUNET_DISK_file_open (data_filename,
 521                                GNUNET_DISK_OPEN_READWRITE |
 522                                GNUNET_DISK_OPEN_CREATE,
 523                                GNUNET_DISK_PERM_USER_READ |
 524                                GNUNET_DISK_PERM_USER_WRITE);
 525     if (data_file == NULL)
 526     {
 527       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Failed to open %s for output!\n",
 528                   data_filename);
 529       GNUNET_free (data_filename);
 530     }
 531   }
 532
 533   if (GNUNET_YES ==
 534       GNUNET_CONFIGURATION_get_value_string (cfg, "test_dht_topo",
 535                                              "output_file", &temp_str))
 536   {
 537     output_file =
 538         GNUNET_DISK_file_open (temp_str,
 539                                GNUNET_DISK_OPEN_READWRITE |
 540                                GNUNET_DISK_OPEN_CREATE,
 541                                GNUNET_DISK_PERM_USER_READ |
 542                                GNUNET_DISK_PERM_USER_WRITE);
 543     if (output_file == NULL)
 544       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Failed to open %s for output!\n",
 545                   temp_str);
 546   }
 547   GNUNET_free_non_null (temp_str);
 548
 549   hosts = GNUNET_TESTING_hosts_load (testing_cfg);
 550
 551   pg = GNUNET_TESTING_peergroup_start (testing_cfg, num_peers, TIMEOUT,
 552                                        &connect_cb, &peergroup_ready, NULL,
 553                                        hosts);
 554   GNUNET_assert (pg != NULL);
 555   shutdown_handle =
 556       GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
 557                                     &shutdown_task, NULL);
 558 }
 559
 560
 561
 562 /**
 563  * test_dht_2d command line options
 564  */
 565 static struct GNUNET_GETOPT_CommandLineOption options[] = {
 566   {'V', "verbose", NULL,
 567    gettext_noop ("be verbose (print progress information)"),
 568    0, &GNUNET_GETOPT_set_one, &verbose},
 569   GNUNET_GETOPT_OPTION_END
 570 };
 571
 572
 573 /**
 574  * Main: start test
 575  */
 576 int
 577 main (int xargc, char *xargv[])
 578 {
 579   char *const argv_torus[] = { "test-dht-2dtorus",
 580     "-c",
 581     "test_dht_2dtorus.conf",
 582 #if VERBOSE
 583     "-L", "DEBUG",
 584 #endif
 585     NULL
 586   };
 587   char *const argv_line[] = { "test-dht-line",
 588     "-c",
 589     "test_dht_line.conf",
 590 #if VERBOSE
 591     "-L", "DEBUG",
 592 #endif
 593     NULL
 594   };
 595   char *const *argv;
 596   int argc;
 597
 598   if (strstr (xargv[0], "test_dht_2dtorus") != NULL)
 599   {
 600     argv = argv_torus;
 601     argc = sizeof (argv_torus) / sizeof (char *);
 602     test_topology = TORUS;
 603   }
 604   else if (strstr (xargv[0], "test_dht_line") != NULL)
 605   {
 606     argv = argv_line;
 607     argc = sizeof (argv_line) / sizeof (char *);
 608     test_topology = LINE;
 609   }
 610   else
 611   {
 612     GNUNET_break (0);
 613     return 1;
 614   }
 615   GNUNET_PROGRAM_run (argc - 1, argv,
 616                       xargv[0],
 617                       gettext_noop ("Test dht in different topologies."),
 618                       options,
 619                       &run, NULL);
 620 #if REMOVE_DIR
 621   GNUNET_DISK_directory_remove ("/tmp/test_dht_topo");
 622 #endif
 623   if (0 != ok)
 624   {
 625     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "test: FAILED!\n");
 626   }
 627   return ok;
 628 }
 629
 630 /* end of test_dht_topo.c */