2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
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7 by the Free Software Foundation; either version 3, or (at your
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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21 * @file dht/test_dht_twopeer_put_get.c
22 * @brief base testcase for testing DHT service with
25 * This testcase starts peers using the GNUNET_TESTING_daemons_start
26 * function call. On peer start, connects to the peers DHT service
27 * by calling GNUNET_DHT_connected. Once notified about all peers
28 * being started (by the peers_started_callback function), calls
29 * GNUNET_TESTING_connect_topology, which connects the peers in a
30 * "straight line" topology. On notification that all peers have
31 * been properly connected, runs the do_put function to insert data
32 * at the first peer. Once the GNUNET_DHT_put function completes,
33 * calls the do_get function which initiates a GNUNET_DHT_get from
34 * the *second* peer. If the GET is successful, schedules finish_testing
35 * to stop the test and shut down peers. If GET is unsuccessful
36 * after GET_TIMEOUT seconds, prints an error message and shuts down
40 #include "gnunet_testing_lib.h"
41 #include "gnunet_core_service.h"
42 #include "gnunet_dht_service.h"
43 #include "block_dns.h"
44 #include "gnunet_signatures.h"
47 #define VERBOSE GNUNET_NO
49 /* Timeout for entire testcase */
50 #define TIMEOUT GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 5)
52 /* Timeout for waiting for replies to get requests */
53 #define GET_TIMEOUT GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 30)
55 /* If number of peers not in config file, use this number */
56 #define DEFAULT_NUM_PEERS 2
61 * Directory to store temp data in, defined in config file
63 static char *test_directory;
66 * Variable used to store the number of connections we should wait for.
68 static unsigned int expected_connections;
71 * Variable used to keep track of how many peers aren't yet started.
73 static unsigned long long peers_left;
76 * Handle to the set of all peers run for this test.
78 static struct GNUNET_TESTING_PeerGroup *pg;
81 * Global handle we will use for GET requests.
83 struct GNUNET_DHT_GetHandle *global_get_handle;
87 * Total number of peers to run, set based on config file.
89 static unsigned long long num_peers;
92 * Global used to count how many connections we have currently
93 * been notified about (how many times has topology_callback been called
96 static unsigned int total_connections;
99 * Global used to count how many failed connections we have
100 * been notified about (how many times has topology_callback
101 * been called with failure?)
103 static unsigned int failed_connections;
105 /* Task handle to use to schedule test failure */
106 static GNUNET_SCHEDULER_TaskIdentifier die_task;
108 /* Global return value (0 for success, anything else for failure) */
112 * Peer identity of the first peer started.
114 static struct GNUNET_PeerIdentity peer1id;
117 * Peer identity of the second peer started.
119 static struct GNUNET_PeerIdentity peer2id;
122 * Handle to the first peers DHT service (via the API)
124 static struct GNUNET_DHT_Handle *peer1dht;
127 * Handle to the second peers DHT service (via the API)
129 static struct GNUNET_DHT_Handle *peer2dht;
132 * Check whether peers successfully shut down.
135 shutdown_callback (void *cls, const char *emsg)
145 * Function scheduled to be run on the successful completion of this
146 * testcase. Specifically, called when our get request completes.
149 finish_testing (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
151 GNUNET_assert (pg != NULL);
152 GNUNET_assert (peer1dht != NULL);
153 GNUNET_assert (peer2dht != NULL);
154 GNUNET_DHT_disconnect (peer1dht);
155 GNUNET_DHT_disconnect (peer2dht);
156 GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
161 * Continuation for the GNUNET_DHT_get_stop call, so that we don't shut
162 * down the peers without freeing memory associated with GET request.
165 end_badly_cont (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
167 if (peer1dht != NULL)
168 GNUNET_DHT_disconnect (peer1dht);
170 if (peer2dht != NULL)
171 GNUNET_DHT_disconnect (peer2dht);
174 GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
178 * Check if the get_handle is being used, if so stop the request. Either
179 * way, schedule the end_badly_cont function which actually shuts down the
183 end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failing test with error: `%s'!\n",
187 if (global_get_handle != NULL)
189 GNUNET_DHT_get_stop (global_get_handle);
190 global_get_handle = NULL;
192 GNUNET_SCHEDULER_add_now (&end_badly_cont, NULL);
197 * Iterator called if the GET request initiated returns a response.
200 * @param exp when will this value expire
201 * @param key key of the result
202 * @param type type of the result
203 * @param size number of bytes in data
204 * @param data pointer to the result data
207 get_result_iterator (void *cls, struct GNUNET_TIME_Absolute exp,
208 const GNUNET_HashCode * key,
209 const struct GNUNET_PeerIdentity *get_path,
210 unsigned int get_path_size,
211 const struct GNUNET_PeerIdentity *put_path,
212 unsigned int put_path_size, enum GNUNET_BLOCK_Type type,
213 size_t size, const void *result_data)
215 GNUNET_HashCode original_key; /* Key data was stored data under */
216 char original_data[4]; /* Made up data that was stored */
218 memset (&original_key, 42, sizeof (GNUNET_HashCode)); /* Set the key to what it was set to previously */
219 memset (original_data, 43, sizeof (original_data));
221 if ((sizeof (original_data) != size) ||
222 (0 != memcmp (&original_key, key, sizeof (GNUNET_HashCode))) ||
223 (0 != memcmp (original_data, result_data, sizeof (original_data))))
225 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
226 "Key or data is not the same as was inserted!\n");
227 GNUNET_SCHEDULER_cancel (die_task);
228 GNUNET_SCHEDULER_add_now (&end_badly,
229 "key or data mismatch in get response!\n");
233 GNUNET_SCHEDULER_cancel (die_task);
234 GNUNET_DHT_get_stop (global_get_handle);
235 global_get_handle = NULL;
236 GNUNET_SCHEDULER_add_now (&finish_testing, NULL);
241 * Called when the PUT request has been transmitted to the DHT service.
242 * Schedule the GET request for some time in the future.
245 put_finished (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
247 GNUNET_HashCode key; /* Key for data lookup */
249 GNUNET_SCHEDULER_cancel (die_task);
251 GNUNET_SCHEDULER_add_delayed (GET_TIMEOUT, &end_badly,
252 "waiting for get response (data not found)");
254 memset (&key, 42, sizeof (GNUNET_HashCode)); /* Set the key to the same thing as when data was inserted */
256 GNUNET_DHT_get_start (peer2dht, GNUNET_TIME_UNIT_FOREVER_REL,
257 GNUNET_BLOCK_TYPE_TEST, &key, 1, GNUNET_DHT_RO_NONE,
258 NULL, 0, &get_result_iterator, NULL);
263 * Set up some data, and call API PUT function
266 do_put (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
268 GNUNET_HashCode key; /* Made up key to store data under */
269 char data[4]; /* Made up data to store */
271 memset (&key, 42, sizeof (GNUNET_HashCode)); /* Set the key to something simple so we can issue GET request */
272 memset (data, 43, sizeof (data));
274 /* Insert the data at the first peer */
275 GNUNET_DHT_put (peer1dht, &key, 1, GNUNET_DHT_RO_NONE, GNUNET_BLOCK_TYPE_TEST,
276 sizeof (data), data, GNUNET_TIME_UNIT_FOREVER_ABS,
277 GNUNET_TIME_UNIT_FOREVER_REL, &put_finished, NULL);
282 * This function is called whenever a connection attempt is finished between two of
283 * the started peers (started with GNUNET_TESTING_daemons_start). The total
284 * number of times this function is called should equal the number returned
285 * from the GNUNET_TESTING_connect_topology call.
287 * The emsg variable is NULL on success (peers connected), and non-NULL on
288 * failure (peers failed to connect).
291 topology_callback (void *cls, const struct GNUNET_PeerIdentity *first,
292 const struct GNUNET_PeerIdentity *second, uint32_t distance,
293 const struct GNUNET_CONFIGURATION_Handle *first_cfg,
294 const struct GNUNET_CONFIGURATION_Handle *second_cfg,
295 struct GNUNET_TESTING_Daemon *first_daemon,
296 struct GNUNET_TESTING_Daemon *second_daemon,
303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
304 "connected peer %s to peer %s, distance %u\n",
305 first_daemon->shortname, second_daemon->shortname, distance);
311 failed_connections++;
312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
313 "Failed to connect peer %s to peer %s with error :\n%s\n",
314 first_daemon->shortname, second_daemon->shortname, emsg);
318 if (total_connections == expected_connections)
321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
322 "Created %d total connections, which is our target number! Starting next phase of testing.\n",
325 GNUNET_SCHEDULER_cancel (die_task);
327 GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly, "from test gets");
329 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS, &do_put, NULL);
331 else if (total_connections + failed_connections == expected_connections)
333 GNUNET_SCHEDULER_cancel (die_task);
335 GNUNET_SCHEDULER_add_now (&end_badly,
336 "from topology_callback (too many failed connections)");
342 * Callback which is called whenever a peer is started (as a result of the
343 * GNUNET_TESTING_daemons_start call.
345 * @param cls closure argument given to GNUNET_TESTING_daemons_start
346 * @param id the GNUNET_PeerIdentity of the started peer
347 * @param cfg the configuration for this specific peer (needed to connect
349 * @param d the handle to the daemon started
350 * @param emsg NULL if peer started, non-NULL on error
353 peers_started_callback (void *cls, const struct GNUNET_PeerIdentity *id,
354 const struct GNUNET_CONFIGURATION_Handle *cfg,
355 struct GNUNET_TESTING_Daemon *d, const char *emsg)
359 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
360 "Failed to start daemon with error: `%s'\n", emsg);
363 GNUNET_assert (id != NULL);
365 /* This is the first peer started */
366 if (peers_left == num_peers)
368 memcpy (&peer1id, id, sizeof (struct GNUNET_PeerIdentity)); /* Save the peer id */
369 peer1dht = GNUNET_DHT_connect (cfg, 100); /* Connect to the first peers DHT service */
370 if (peer1dht == NULL) /* If DHT connect failed */
372 GNUNET_SCHEDULER_cancel (die_task);
373 GNUNET_SCHEDULER_add_now (&end_badly, "Failed to get dht handle!\n");
376 else /* This is the second peer started */
378 memcpy (&peer2id, id, sizeof (struct GNUNET_PeerIdentity)); /* Same as for first peer... */
379 peer2dht = GNUNET_DHT_connect (cfg, 100);
380 if (peer2dht == NULL)
382 GNUNET_SCHEDULER_cancel (die_task);
383 GNUNET_SCHEDULER_add_now (&end_badly, "Failed to get dht handle!\n");
387 /* Decrement number of peers left to start */
390 if (peers_left == 0) /* Indicates all peers started */
393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
394 "All %d daemons started, now connecting peers!\n", num_peers);
396 expected_connections = -1;
397 if ((pg != NULL)) /* Sanity check */
399 /* Connect peers in a "straight line" topology, return the number of expected connections */
400 expected_connections =
401 GNUNET_TESTING_connect_topology (pg, GNUNET_TESTING_TOPOLOGY_LINE,
402 GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
403 0.0, TIMEOUT, 12, NULL, NULL);
406 /* Cancel current timeout fail task */
407 GNUNET_SCHEDULER_cancel (die_task);
408 if (expected_connections == GNUNET_SYSERR) /* Some error happened */
410 GNUNET_SCHEDULER_add_now (&end_badly,
411 "from connect topology (bad return)");
413 /* Schedule timeout on failure task */
415 GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
416 "from connect topology (timeout)");
422 run (void *cls, char *const *args, const char *cfgfile,
423 const struct GNUNET_CONFIGURATION_Handle *cfg)
426 /* Get path from configuration file */
428 GNUNET_CONFIGURATION_get_value_string (cfg, "paths", "servicehome",
435 /* Get number of peers to start from configuration (should be two) */
437 GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "num_peers",
439 num_peers = DEFAULT_NUM_PEERS;
441 /* Set peers_left so we know when all peers started */
442 peers_left = num_peers;
444 /* Set up a task to end testing if peer start fails */
446 GNUNET_SCHEDULER_add_delayed (TIMEOUT, &end_badly,
447 "didn't start all daemons in reasonable amount of time!!!");
449 /* Start num_peers peers, call peers_started_callback on peer start, topology_callback on peer connect */
450 /* Read the API documentation for other parameters! */
451 pg = GNUNET_TESTING_daemons_start (cfg, num_peers, 2, 2, TIMEOUT, NULL, NULL,
452 &peers_started_callback, NULL,
453 &topology_callback, NULL, NULL);
462 /* Arguments for GNUNET_PROGRAM_run */
463 char *const argv[] = { "test-dht-twopeer-put-get", /* Name to give running binary */
465 "test_dht_twopeer_data.conf", /* Config file to use */
471 struct GNUNET_GETOPT_CommandLineOption options[] = {
472 GNUNET_GETOPT_OPTION_END
474 /* Run the run function as a new program */
476 GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1, argv,
477 "test-dht-twopeer-put-get", "nohelp", options, &run,
479 if (ret != GNUNET_OK)
481 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
482 "`test-dht-twopeer': Failed with error code %d\n", ret);
488 main (int argc, char *argv[])
492 GNUNET_log_setup ("test-dht-twopeer",
501 * Need to remove base directory, subdirectories taken care
502 * of by the testing framework.
504 if (GNUNET_DISK_directory_remove (test_directory) != GNUNET_OK)
506 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
507 "Failed to remove testing directory %s\n", test_directory);
512 /* end of test_dht_twopeer_put_get.c */