src/dht/test_dht_twopeer.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2009 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_twopeer.c
  22  * @brief base testcase for testing DHT service with
  23  *        two running peers
  24  */
  25 #include "platform.h"
  26 #include "gnunet_testing_lib.h"
  27 #include "gnunet_core_service.h"
  28 #include "gnunet_dht_service.h"
  29
  30 /* DEFINES */
  31 #define VERBOSE GNUNET_NO
  32
  33 #define MAX_GET_ATTEMPTS 10
  34
  35 #define TIMEOUT GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 5)
  36
  37 #define DEFAULT_NUM_PEERS 2
  38
  39 /* Structs */
  40
  41 struct PeerGetContext
  42 {
  43   struct GNUNET_PeerIdentity *peer;
  44
  45   struct GNUNET_DHT_Handle *dht_handle;
  46
  47   struct GNUNET_DHT_GetHandle *get_handle;
  48
  49   unsigned int get_attempts;
  50
  51   GNUNET_SCHEDULER_TaskIdentifier retry_task;
  52 };
  53
  54 /* Globals */
  55 static char *test_directory;
  56
  57 static struct PeerGetContext curr_get_ctx;
  58
  59 static unsigned int expected_connections;
  60
  61 static unsigned long long peers_left;
  62
  63 static struct GNUNET_TESTING_PeerGroup *pg;
  64
  65 static unsigned long long num_peers;
  66
  67 static unsigned int total_gets;
  68
  69 static unsigned int gets_succeeded;
  70
  71 static unsigned int total_connections;
  72
  73 static unsigned int failed_connections;
  74
  75 static GNUNET_SCHEDULER_TaskIdentifier die_task;
  76
  77 static int ok;
  78
  79 static struct GNUNET_PeerIdentity peer1id;
  80
  81 static struct GNUNET_PeerIdentity peer2id;
  82
  83 static struct GNUNET_DHT_Handle *peer1dht;
  84
  85 static struct GNUNET_DHT_Handle *peer2dht;
  86
  87 /**
  88  * Check whether peers successfully shut down.
  89  */
  90 static void
  91 shutdown_callback (void *cls, const char *emsg)
  92 {
  93   if (emsg != NULL)
  94   {
  95     if (ok == 0)
  96       ok = 2;
  97   }
  98 }
  99
 100 static void
 101 finish_testing (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 102 {
 103   GNUNET_assert (pg != NULL);
 104   GNUNET_assert (peer1dht != NULL);
 105   GNUNET_assert (peer2dht != NULL);
 106   GNUNET_DHT_disconnect (peer1dht);
 107   GNUNET_DHT_disconnect (peer2dht);
 108   GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
 109   pg = NULL;
 110   ok = 0;
 111 }
 112
 113 static void
 114 end_badly_cont (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 115 {
 116   if (peer1dht != NULL)
 117     GNUNET_DHT_disconnect (peer1dht);
 118
 119   if (peer2dht != NULL)
 120     GNUNET_DHT_disconnect (peer2dht);
 121
 122   if (pg != NULL)
 123   {
 124     GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
 125     pg = NULL;
 126   }
 127
 128   if (curr_get_ctx.retry_task != GNUNET_SCHEDULER_NO_TASK)
 129     GNUNET_SCHEDULER_cancel (curr_get_ctx.retry_task);
 130 }
 131
 132
 133 static void
 134 end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 135 {
 136   const char *emsg = cls;
 137
 138   fprintf (stderr,
 139            "Error: %s\n",
 140            emsg);
 141   if (curr_get_ctx.retry_task != GNUNET_SCHEDULER_NO_TASK)
 142     GNUNET_SCHEDULER_cancel (curr_get_ctx.retry_task);
 143
 144   if (curr_get_ctx.get_handle != NULL)
 145   {
 146     GNUNET_DHT_get_stop (curr_get_ctx.get_handle);
 147   }
 148
 149   GNUNET_SCHEDULER_add_now (&end_badly_cont, NULL);
 150   ok = 1;
 151 }
 152
 153
 154 /* Forward declaration */
 155 static void
 156 do_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
 157
 158 /**
 159  * Iterator called on each result obtained for a DHT
 160  * operation that expects a reply
 161  *
 162  * @param cls closure
 163  * @param exp when will this value expire
 164  * @param key key of the result
 165  * @param type type of the result
 166  * @param size number of bytes in data
 167  * @param data pointer to the result data
 168  */
 169 static void
 170 get_result_iterator (void *cls, struct GNUNET_TIME_Absolute exp,
 171                      const GNUNET_HashCode * key,
 172                      const struct GNUNET_PeerIdentity *const *get_path,
 173                      const struct GNUNET_PeerIdentity *const *put_path,
 174                      enum GNUNET_BLOCK_Type type, size_t size, const void *data)
 175 {
 176   struct PeerGetContext *get_context = cls;
 177
 178   if (0 !=
 179       memcmp (&get_context->peer->hashPubKey, key, sizeof (GNUNET_HashCode)))
 180   {
 181     fprintf (stderr, "??\n");
 182     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 183                 "Key returned is not the same key as was searched for!\n");
 184     GNUNET_SCHEDULER_cancel (die_task);
 185     die_task =
 186         GNUNET_SCHEDULER_add_now (&end_badly,
 187                                   "key mismatch in get response!\n");
 188     return;
 189   }
 190   fprintf (stderr, "!\n");
 191   if (get_context->retry_task != GNUNET_SCHEDULER_NO_TASK)
 192   {
 193     GNUNET_SCHEDULER_cancel (get_context->retry_task);
 194     get_context->retry_task = GNUNET_SCHEDULER_NO_TASK;
 195   }
 196
 197   if (get_context->peer == &peer2id)
 198   {
 199     get_context->peer = &peer1id;
 200     get_context->dht_handle = peer2dht;
 201     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 202                 "Received first correct GET request response!\n");
 203     GNUNET_DHT_get_stop (get_context->get_handle);
 204     GNUNET_SCHEDULER_add_now (&do_get, get_context);
 205   }
 206   else
 207   {
 208     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 209                 "Received second correct GET request response!\n");
 210     GNUNET_SCHEDULER_cancel (die_task);
 211     GNUNET_DHT_get_stop (get_context->get_handle);
 212     die_task = GNUNET_SCHEDULER_add_now (&finish_testing, NULL);
 213   }
 214
 215 }
 216
 217 static void
 218 stop_retry_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
 219
 220
 221 static void
 222 get_stop_finished (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 223 {
 224   struct PeerGetContext *get_context = cls;
 225
 226   if (get_context->get_attempts < MAX_GET_ATTEMPTS)
 227     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 228                 "Get attempt %u failed, retrying request!\n",
 229                 get_context->get_attempts);
 230   else
 231   {
 232     fprintf (stderr, "?\n");
 233     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 234                 "Too many attempts failed, ending test!\n",
 235                 get_context->get_attempts);
 236     GNUNET_SCHEDULER_cancel (die_task);
 237     die_task =
 238         GNUNET_SCHEDULER_add_now (&end_badly,
 239                                   "GET attempt failed, ending test!\n");
 240     return;
 241   }
 242   fprintf (stderr, ".");
 243   get_context->get_attempts++;
 244   get_context->retry_task =
 245       GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
 246                                     (GNUNET_TIME_UNIT_SECONDS, 10),
 247                                     &stop_retry_get, get_context);
 248   get_context->get_handle =
 249       GNUNET_DHT_get_start (get_context->dht_handle,
 250                             GNUNET_TIME_relative_multiply
 251                             (GNUNET_TIME_UNIT_SECONDS, 5),
 252                             GNUNET_BLOCK_TYPE_DHT_HELLO,
 253                             &get_context->peer->hashPubKey,
 254                             DEFAULT_GET_REPLICATION, GNUNET_DHT_RO_NONE, NULL,
 255                             0, NULL, 0, &get_result_iterator, get_context);
 256 }
 257
 258
 259 static void
 260 stop_retry_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 261 {
 262   struct PeerGetContext *get_context = cls;
 263
 264   get_context->retry_task = GNUNET_SCHEDULER_NO_TASK;
 265   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 266               "Get attempt %u failed, canceling request!\n",
 267               get_context->get_attempts);
 268   GNUNET_DHT_get_stop (get_context->get_handle);
 269   get_context->get_handle = NULL;
 270   GNUNET_SCHEDULER_add_now (&get_stop_finished, get_context);
 271 }
 272
 273
 274 static void
 275 do_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 276 {
 277   struct PeerGetContext *get_context = cls;
 278
 279   get_context->retry_task =
 280       GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
 281                                     (GNUNET_TIME_UNIT_SECONDS, 10),
 282                                     &stop_retry_get, get_context);
 283
 284   get_context->get_handle =
 285       GNUNET_DHT_get_start (get_context->dht_handle,
 286                             GNUNET_TIME_relative_multiply
 287                             (GNUNET_TIME_UNIT_SECONDS, 5),
 288                             GNUNET_BLOCK_TYPE_DHT_HELLO,
 289                             &get_context->peer->hashPubKey,
 290                             DEFAULT_GET_REPLICATION, GNUNET_DHT_RO_NONE, NULL,
 291                             0, NULL, 0, &get_result_iterator, get_context);
 292 }
 293
 294
 295 static void
 296 topology_callback (void *cls, const struct GNUNET_PeerIdentity *first,
 297                    const struct GNUNET_PeerIdentity *second, uint32_t distance,
 298                    const struct GNUNET_CONFIGURATION_Handle *first_cfg,
 299                    const struct GNUNET_CONFIGURATION_Handle *second_cfg,
 300                    struct GNUNET_TESTING_Daemon *first_daemon,
 301                    struct GNUNET_TESTING_Daemon *second_daemon,
 302                    const char *emsg)
 303 {
 304   if (emsg == NULL)
 305   {
 306     total_connections++;
 307 #if VERBOSE
 308     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 309                 "connected peer %s to peer %s, distance %u\n",
 310                 first_daemon->shortname, second_daemon->shortname, distance);
 311 #endif
 312   }
 313 #if VERBOSE
 314   else
 315   {
 316     failed_connections++;
 317     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 318                 "Failed to connect peer %s to peer %s with error :\n%s\n",
 319                 first_daemon->shortname, second_daemon->shortname, emsg);
 320   }
 321 #endif
 322
 323   if (total_connections == expected_connections)
 324   {
 325 #if VERBOSE
 326     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 327                 "Created %d total connections, which is our target number!  Starting next phase of testing.\n",
 328                 total_connections);
 329 #endif
 330     GNUNET_SCHEDULER_cancel (die_task);
 331     die_task =
 332         GNUNET_SCHEDULER_add_delayed (TIMEOUT,
 333                                       &end_badly, "Timeout trying to GET");
 334
 335     curr_get_ctx.dht_handle = peer1dht;
 336     curr_get_ctx.peer = &peer2id;
 337     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
 338                                   (GNUNET_TIME_UNIT_SECONDS, 2), &do_get,
 339                                   &curr_get_ctx);
 340   }
 341   else if (total_connections + failed_connections == expected_connections)
 342   {
 343     GNUNET_SCHEDULER_cancel (die_task);
 344     die_task =
 345         GNUNET_SCHEDULER_add_now (&end_badly,
 346                                   "from topology_callback (too many failed connections)");
 347   }
 348 }
 349
 350
 351 static void
 352 connect_topology (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 353 {
 354   expected_connections = -1;
 355   if ((pg != NULL) && (peers_left == 0))
 356     expected_connections =
 357         GNUNET_TESTING_connect_topology (pg, GNUNET_TESTING_TOPOLOGY_CLIQUE,
 358                                          GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
 359                                          0.0, TIMEOUT, 12, NULL, NULL);
 360
 361   GNUNET_SCHEDULER_cancel (die_task);
 362   if (expected_connections == GNUNET_SYSERR)
 363     die_task =
 364         GNUNET_SCHEDULER_add_now (&end_badly,
 365                                   "from connect topology (bad return)");
 366   else
 367     die_task =
 368         GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
 369                                       "from connect topology (timeout)");
 370 }
 371
 372
 373 static void
 374 peers_started_callback (void *cls, const struct GNUNET_PeerIdentity *id,
 375                         const struct GNUNET_CONFIGURATION_Handle *cfg,
 376                         struct GNUNET_TESTING_Daemon *d, const char *emsg)
 377 {
 378   if (emsg != NULL)
 379   {
 380     fprintf (stderr,
 381              "Failed to start daemon: `%s'\n",
 382              emsg);
 383     return;
 384   }
 385   GNUNET_assert (id != NULL);
 386   if (peers_left == num_peers)
 387   {
 388     memcpy (&peer1id, id, sizeof (struct GNUNET_PeerIdentity));
 389     peer1dht = GNUNET_DHT_connect (cfg, 100);
 390     if (peer1dht == NULL)
 391     {
 392       GNUNET_SCHEDULER_cancel (die_task);
 393       die_task =
 394           GNUNET_SCHEDULER_add_now (&end_badly, "Failed to get dht handle!\n");
 395     }
 396   }
 397   else
 398   {
 399     memcpy (&peer2id, id, sizeof (struct GNUNET_PeerIdentity));
 400     peer2dht = GNUNET_DHT_connect (cfg, 100);
 401     if (peer2dht == NULL)
 402     {
 403       GNUNET_SCHEDULER_cancel (die_task);
 404       die_task =
 405           GNUNET_SCHEDULER_add_now (&end_badly, "Failed to get dht handle!\n");
 406     }
 407   }
 408
 409
 410   peers_left--;
 411
 412   if (peers_left == 0)
 413   {
 414 #if VERBOSE
 415     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 416                 "All %d daemons started, now connecting peers!\n", num_peers);
 417 #endif
 418     GNUNET_SCHEDULER_cancel (die_task);
 419     /* Set up task in case topology creation doesn't finish
 420      * within a reasonable amount of time */
 421     die_task =
 422         GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
 423                                       "from peers_started_callback");
 424
 425     GNUNET_SCHEDULER_add_now (&connect_topology, NULL);
 426     ok = 0;
 427   }
 428 }
 429
 430
 431 static void
 432 run (void *cls, char *const *args, const char *cfgfile,
 433      const struct GNUNET_CONFIGURATION_Handle *cfg)
 434 {
 435
 436   if (GNUNET_YES !=
 437       GNUNET_CONFIGURATION_get_value_string (cfg, "paths", "servicehome",
 438                                              &test_directory))
 439   {
 440     ok = 404;
 441     return;
 442   }
 443
 444   if (GNUNET_SYSERR ==
 445       GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "num_peers",
 446                                              &num_peers))
 447     num_peers = DEFAULT_NUM_PEERS;
 448
 449   peers_left = num_peers;
 450   total_gets = num_peers;
 451   gets_succeeded = 0;
 452   /* Set up a task to end testing if peer start fails */
 453   die_task =
 454       GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
 455                                     "didn't start all daemons in reasonable amount of time!!!");
 456
 457   pg = GNUNET_TESTING_daemons_start (cfg, num_peers, 10, num_peers, TIMEOUT,
 458                                      NULL, NULL, &peers_started_callback, NULL,
 459                                      &topology_callback, NULL, NULL);
 460
 461 }
 462
 463 static int
 464 check ()
 465 {
 466   int ret;
 467
 468   char *const argv[] = { "test-dht-twopeer",
 469     "-c",
 470     "test_dht_twopeer_data.conf",
 471 #if VERBOSE
 472     "-L", "DEBUG",
 473 #endif
 474     NULL
 475   };
 476   struct GNUNET_GETOPT_CommandLineOption options[] = {
 477     GNUNET_GETOPT_OPTION_END
 478   };
 479   ret =
 480       GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1, argv,
 481                           "test-dht-twopeer", "nohelp", options, &run, &ok);
 482   if (ret != GNUNET_OK)
 483   {
 484     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 485                 "`test-dht-twopeer': Failed with error code %d\n", ret);
 486   }
 487   return ok;
 488 }
 489
 490 int
 491 main (int argc, char *argv[])
 492 {
 493   int ret;
 494
 495   GNUNET_log_setup ("test-dht-twopeer",
 496 #if VERBOSE
 497                     "DEBUG",
 498 #else
 499                     "WARNING",
 500 #endif
 501                     NULL);
 502   ret = check ();
 503   /**
 504    * Need to remove base directory, subdirectories taken care
 505    * of by the testing framework.
 506    */
 507   if (GNUNET_DISK_directory_remove (test_directory) != GNUNET_OK)
 508   {
 509     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 510                 "Failed to remove testing directory %s\n", test_directory);
 511   }
 512   return ret;
 513 }
 514
 515 /* end of test_dht_twopeer.c */