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_new.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 *get_path,
 173                      unsigned int get_path_length,
 174                      const struct GNUNET_PeerIdentity *put_path,
 175                      unsigned int put_path_length,
 176                      enum GNUNET_BLOCK_Type type, size_t size, const void *data)
 177 {
 178   struct PeerGetContext *get_context = cls;
 179
 180   if (0 !=
 181       memcmp (&get_context->peer->hashPubKey, key, sizeof (GNUNET_HashCode)))
 182   {
 183     fprintf (stderr, "??\n");
 184     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 185                 "Key returned is not the same key as was searched for!\n");
 186     GNUNET_SCHEDULER_cancel (die_task);
 187     die_task =
 188         GNUNET_SCHEDULER_add_now (&end_badly,
 189                                   "key mismatch in get response!\n");
 190     return;
 191   }
 192   fprintf (stderr, "!\n");
 193   if (get_context->retry_task != GNUNET_SCHEDULER_NO_TASK)
 194   {
 195     GNUNET_SCHEDULER_cancel (get_context->retry_task);
 196     get_context->retry_task = GNUNET_SCHEDULER_NO_TASK;
 197   }
 198
 199   if (get_context->peer == &peer2id)
 200   {
 201     get_context->peer = &peer1id;
 202     get_context->dht_handle = peer2dht;
 203     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 204                 "Received first correct GET request response!\n");
 205     GNUNET_DHT_get_stop (get_context->get_handle);
 206     GNUNET_SCHEDULER_add_now (&do_get, get_context);
 207   }
 208   else
 209   {
 210     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 211                 "Received second correct GET request response!\n");
 212     GNUNET_SCHEDULER_cancel (die_task);
 213     GNUNET_DHT_get_stop (get_context->get_handle);
 214     die_task = GNUNET_SCHEDULER_add_now (&finish_testing, NULL);
 215   }
 216
 217 }
 218
 219 static void
 220 stop_retry_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
 221
 222
 223 static void
 224 get_stop_finished (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 225 {
 226   struct PeerGetContext *get_context = cls;
 227
 228   if (get_context->get_attempts < MAX_GET_ATTEMPTS)
 229     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 230                 "Get attempt %u failed, retrying request!\n",
 231                 get_context->get_attempts);
 232   else
 233   {
 234     fprintf (stderr, "?\n");
 235     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 236                 "Too many attempts failed, ending test!\n",
 237                 get_context->get_attempts);
 238     GNUNET_SCHEDULER_cancel (die_task);
 239     die_task =
 240         GNUNET_SCHEDULER_add_now (&end_badly,
 241                                   "GET attempt failed, ending test!\n");
 242     return;
 243   }
 244   fprintf (stderr, ".");
 245   get_context->get_attempts++;
 246   get_context->retry_task =
 247       GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
 248                                     (GNUNET_TIME_UNIT_SECONDS, 10),
 249                                     &stop_retry_get, get_context);
 250   get_context->get_handle =
 251       GNUNET_DHT_get_start (get_context->dht_handle,
 252                             GNUNET_TIME_relative_multiply
 253                             (GNUNET_TIME_UNIT_SECONDS, 5),
 254                             GNUNET_BLOCK_TYPE_DHT_HELLO,
 255                             &get_context->peer->hashPubKey,
 256                             1, GNUNET_DHT_RO_NONE, NULL,
 257                             0, &get_result_iterator, get_context);
 258 }
 259
 260
 261 static void
 262 stop_retry_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 263 {
 264   struct PeerGetContext *get_context = cls;
 265
 266   get_context->retry_task = GNUNET_SCHEDULER_NO_TASK;
 267   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 268               "Get attempt %u failed, canceling request!\n",
 269               get_context->get_attempts);
 270   GNUNET_DHT_get_stop (get_context->get_handle);
 271   get_context->get_handle = NULL;
 272   GNUNET_SCHEDULER_add_now (&get_stop_finished, get_context);
 273 }
 274
 275
 276 static void
 277 do_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 278 {
 279   struct PeerGetContext *get_context = cls;
 280
 281   get_context->retry_task =
 282       GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
 283                                     (GNUNET_TIME_UNIT_SECONDS, 10),
 284                                     &stop_retry_get, get_context);
 285
 286   get_context->get_handle =
 287       GNUNET_DHT_get_start (get_context->dht_handle,
 288                             GNUNET_TIME_relative_multiply
 289                             (GNUNET_TIME_UNIT_SECONDS, 5),
 290                             GNUNET_BLOCK_TYPE_DHT_HELLO,
 291                             &get_context->peer->hashPubKey,
 292                             1, GNUNET_DHT_RO_NONE, NULL,
 293                             0, &get_result_iterator, get_context);
 294 }
 295
 296
 297 static void
 298 topology_callback (void *cls, const struct GNUNET_PeerIdentity *first,
 299                    const struct GNUNET_PeerIdentity *second, uint32_t distance,
 300                    const struct GNUNET_CONFIGURATION_Handle *first_cfg,
 301                    const struct GNUNET_CONFIGURATION_Handle *second_cfg,
 302                    struct GNUNET_TESTING_Daemon *first_daemon,
 303                    struct GNUNET_TESTING_Daemon *second_daemon,
 304                    const char *emsg)
 305 {
 306   if (emsg == NULL)
 307   {
 308     total_connections++;
 309 #if VERBOSE
 310     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 311                 "connected peer %s to peer %s, distance %u\n",
 312                 first_daemon->shortname, second_daemon->shortname, distance);
 313 #endif
 314   }
 315 #if VERBOSE
 316   else
 317   {
 318     failed_connections++;
 319     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 320                 "Failed to connect peer %s to peer %s with error :\n%s\n",
 321                 first_daemon->shortname, second_daemon->shortname, emsg);
 322   }
 323 #endif
 324
 325   if (total_connections == expected_connections)
 326   {
 327 #if VERBOSE
 328     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 329                 "Created %d total connections, which is our target number!  Starting next phase of testing.\n",
 330                 total_connections);
 331 #endif
 332     GNUNET_SCHEDULER_cancel (die_task);
 333     die_task =
 334         GNUNET_SCHEDULER_add_delayed (TIMEOUT,
 335                                       &end_badly, "Timeout trying to GET");
 336
 337     curr_get_ctx.dht_handle = peer1dht;
 338     curr_get_ctx.peer = &peer2id;
 339     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
 340                                   (GNUNET_TIME_UNIT_SECONDS, 2), &do_get,
 341                                   &curr_get_ctx);
 342   }
 343   else if (total_connections + failed_connections == expected_connections)
 344   {
 345     GNUNET_SCHEDULER_cancel (die_task);
 346     die_task =
 347         GNUNET_SCHEDULER_add_now (&end_badly,
 348                                   "from topology_callback (too many failed connections)");
 349   }
 350 }
 351
 352
 353 static void
 354 connect_topology (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 355 {
 356   expected_connections = -1;
 357   if ((pg != NULL) && (peers_left == 0))
 358     expected_connections =
 359         GNUNET_TESTING_connect_topology (pg, GNUNET_TESTING_TOPOLOGY_CLIQUE,
 360                                          GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
 361                                          0.0, TIMEOUT, 12, NULL, NULL);
 362
 363   GNUNET_SCHEDULER_cancel (die_task);
 364   if (expected_connections == GNUNET_SYSERR)
 365     die_task =
 366         GNUNET_SCHEDULER_add_now (&end_badly,
 367                                   "from connect topology (bad return)");
 368   else
 369     die_task =
 370         GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
 371                                       "from connect topology (timeout)");
 372 }
 373
 374
 375 static void
 376 peers_started_callback (void *cls, const struct GNUNET_PeerIdentity *id,
 377                         const struct GNUNET_CONFIGURATION_Handle *cfg,
 378                         struct GNUNET_TESTING_Daemon *d, const char *emsg)
 379 {
 380   if (emsg != NULL)
 381   {
 382     fprintf (stderr,
 383              "Failed to start daemon: `%s'\n",
 384              emsg);
 385     return;
 386   }
 387   GNUNET_assert (id != NULL);
 388   if (peers_left == num_peers)
 389   {
 390     memcpy (&peer1id, id, sizeof (struct GNUNET_PeerIdentity));
 391     peer1dht = GNUNET_DHT_connect (cfg, 100);
 392     if (peer1dht == NULL)
 393     {
 394       GNUNET_SCHEDULER_cancel (die_task);
 395       die_task =
 396           GNUNET_SCHEDULER_add_now (&end_badly, "Failed to get dht handle!\n");
 397     }
 398   }
 399   else
 400   {
 401     memcpy (&peer2id, id, sizeof (struct GNUNET_PeerIdentity));
 402     peer2dht = GNUNET_DHT_connect (cfg, 100);
 403     if (peer2dht == NULL)
 404     {
 405       GNUNET_SCHEDULER_cancel (die_task);
 406       die_task =
 407           GNUNET_SCHEDULER_add_now (&end_badly, "Failed to get dht handle!\n");
 408     }
 409   }
 410
 411
 412   peers_left--;
 413
 414   if (peers_left == 0)
 415   {
 416 #if VERBOSE
 417     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 418                 "All %d daemons started, now connecting peers!\n", num_peers);
 419 #endif
 420     GNUNET_SCHEDULER_cancel (die_task);
 421     /* Set up task in case topology creation doesn't finish
 422      * within a reasonable amount of time */
 423     die_task =
 424         GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
 425                                       "from peers_started_callback");
 426
 427     GNUNET_SCHEDULER_add_now (&connect_topology, NULL);
 428     ok = 0;
 429   }
 430 }
 431
 432
 433 static void
 434 run (void *cls, char *const *args, const char *cfgfile,
 435      const struct GNUNET_CONFIGURATION_Handle *cfg)
 436 {
 437
 438   if (GNUNET_YES !=
 439       GNUNET_CONFIGURATION_get_value_string (cfg, "paths", "servicehome",
 440                                              &test_directory))
 441   {
 442     ok = 404;
 443     return;
 444   }
 445
 446   if (GNUNET_SYSERR ==
 447       GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "num_peers",
 448                                              &num_peers))
 449     num_peers = DEFAULT_NUM_PEERS;
 450
 451   peers_left = num_peers;
 452   total_gets = num_peers;
 453   gets_succeeded = 0;
 454   /* Set up a task to end testing if peer start fails */
 455   die_task =
 456       GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
 457                                     "didn't start all daemons in reasonable amount of time!!!");
 458
 459   pg = GNUNET_TESTING_daemons_start (cfg, num_peers, 10, num_peers, TIMEOUT,
 460                                      NULL, NULL, &peers_started_callback, NULL,
 461                                      &topology_callback, NULL, NULL);
 462
 463 }
 464
 465 static int
 466 check ()
 467 {
 468   int ret;
 469
 470   char *const argv[] = { "test-dht-twopeer",
 471     "-c",
 472     "test_dht_twopeer_data.conf",
 473 #if VERBOSE
 474     "-L", "DEBUG",
 475 #endif
 476     NULL
 477   };
 478   struct GNUNET_GETOPT_CommandLineOption options[] = {
 479     GNUNET_GETOPT_OPTION_END
 480   };
 481   ret =
 482       GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1, argv,
 483                           "test-dht-twopeer", "nohelp", options, &run, &ok);
 484   if (ret != GNUNET_OK)
 485   {
 486     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 487                 "`test-dht-twopeer': Failed with error code %d\n", ret);
 488   }
 489   return ok;
 490 }
 491
 492 int
 493 main (int argc, char *argv[])
 494 {
 495   int ret;
 496
 497   GNUNET_log_setup ("test-dht-twopeer",
 498 #if VERBOSE
 499                     "DEBUG",
 500 #else
 501                     "WARNING",
 502 #endif
 503                     NULL);
 504   ret = check ();
 505   /**
 506    * Need to remove base directory, subdirectories taken care
 507    * of by the testing framework.
 508    */
 509   if (GNUNET_DISK_directory_remove (test_directory) != GNUNET_OK)
 510   {
 511     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 512                 "Failed to remove testing directory %s\n", test_directory);
 513   }
 514   return ret;
 515 }
 516
 517 /* end of test_dht_twopeer.c */