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22 * @file dht/gnunet_dht_profiler.c
23 * @brief Profiler for GNUnet DHT
24 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
28 #include "gnunet_util_lib.h"
29 #include "gnunet_testbed_service.h"
30 #include "gnunet_dht_service.h"
33 GNUNET_log (GNUNET_ERROR_TYPE_INFO, __VA_ARGS__)
36 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
39 * Number of peers which should perform a PUT out of 100 peers
41 #define PUT_PROBABILITY 50
45 * Number of peers which should act as malicious peers
47 #define MALICIOUS_PROBABILITY 20
50 * Context for a peer which should act maliciously.
52 struct MaliciousContext;
59 static struct GNUNET_CONFIGURATION_Handle *cfg;
62 * Name of the file with the hosts to run the test over
64 static char *hosts_file;
67 * Context for a peer which actively does DHT PUT/GET
72 * Context to hold data of peer
77 * The testbed peer this context belongs to
79 struct GNUNET_TESTBED_Peer *peer;
82 * Testbed operation acting on this peer
84 struct GNUNET_TESTBED_Operation *op;
87 * Active context; NULL if this peer is not an active peer
89 struct ActiveContext *ac;
93 * Malicious context; NULL if this peer is NOT malicious.
95 struct MaliciousContext *mc;
102 * Context for a peer which should act maliciously.
104 struct MaliciousContext
107 * The linked peer context
112 * Handler to the DHT service
114 struct GNUNET_DHT_Handle *dht;
117 * Handler to malicious api
119 struct GNUNET_DHT_ActMaliciousHandle *dht_malicious;
123 * List of all the malicious peers contexts.
125 struct Context **malicious_peer_contexts = NULL;
128 * Context for a peer which should act maliciously.
130 struct Malicious_Context
133 * The linked peer context
138 * Handler to the DHT service
140 struct GNUNET_DHT_Handle *dht;
144 * Array of malicious peers.
146 static struct MaliciousContext *a_mc;
149 * Number or malicious peers.
151 static unsigned int n_malicious;
156 * Context for a peer which actively does DHT PUT/GET
161 * The linked peer context
166 * Handler to the DHT service
168 struct GNUNET_DHT_Handle *dht;
171 * The data used for do a PUT. Will be NULL if a PUT hasn't been performed yet
176 * The active context used for our DHT GET
178 struct ActiveContext *get_ac;
183 struct GNUNET_DHT_PutHandle *dht_put;
188 struct GNUNET_DHT_GetHandle *dht_get;
191 * The hash of the @e put_data
193 struct GNUNET_HashCode hash;
198 struct GNUNET_SCHEDULER_Task * delay_task;
201 * The size of the @e put_data
203 uint16_t put_data_size;
206 * The number of peers currently doing GET on our data
213 * An array of contexts. The size of this array should be equal to @a num_peers
215 static struct Context *a_ctx;
218 * Array of active peers
220 static struct ActiveContext *a_ac;
223 * The delay between rounds for collecting statistics
225 static struct GNUNET_TIME_Relative delay_stats;
228 * The delay to start puts.
230 static struct GNUNET_TIME_Relative delay_put;
233 * The delay to start puts.
235 static struct GNUNET_TIME_Relative delay_get;
238 * The timeout for GET and PUT
240 static struct GNUNET_TIME_Relative timeout;
245 static unsigned int num_peers;
248 * Number of active peers
250 static unsigned int n_active;
253 * Number of DHT service connections we currently have
255 static unsigned int n_dht;
258 * Number of DHT PUTs made
260 static unsigned int n_puts;
263 * Number of DHT PUTs succeeded
265 static unsigned int n_puts_ok;
268 * Number of DHT PUTs failed
270 static unsigned int n_puts_fail;
273 * Number of DHT GETs made
275 static unsigned int n_gets;
278 * Number of DHT GETs succeeded
280 static unsigned int n_gets_ok;
283 * Number of DHT GETs succeeded
285 static unsigned int n_gets_fail;
290 static unsigned int replication;
293 * Number of times we try to find the successor circle formation
295 static unsigned int max_searches;
298 * Testbed Operation (to get stats).
300 static struct GNUNET_TESTBED_Operation *bandwidth_stats_op;
303 * To get successor stats.
305 static struct GNUNET_TESTBED_Operation *successor_stats_op;
308 * Testbed peer handles.
310 static struct GNUNET_TESTBED_Peer **testbed_handles;
313 * Total number of messages sent by peer.
315 static uint64_t outgoing_bandwidth;
318 * Total number of messages received by peer.
320 static uint64_t incoming_bandwidth;
323 * Average number of hops taken to do put.
325 static double average_put_path_length;
328 * Average number of hops taken to do get.
330 static double average_get_path_length;
333 * Total put path length across all peers.
335 static unsigned int total_put_path_length;
338 * Total get path length across all peers.
340 static unsigned int total_get_path_length;
343 * Hashmap to store pair of peer and its corresponding successor.
345 static struct GNUNET_CONTAINER_MultiHashMap *successor_peer_hashmap;
348 * Key to start the lookup on successor_peer_hashmap.
350 static struct GNUNET_HashCode *start_key;
353 * Flag used to get the start_key.
358 * Task to collect peer and its current successor statistics.
360 static struct GNUNET_SCHEDULER_Task * successor_stats_task;
363 * Closure for successor_stats_task.
365 struct Collect_Stat_Context
368 * Current Peer Context.
370 struct Context *service_connect_ctx;
373 * Testbed operation acting on this peer
375 struct GNUNET_TESTBED_Operation *op;
379 * List of all the peers contexts.
381 struct Context **peer_contexts = NULL;
384 * Counter to keep track of peers added to peer_context lists.
386 static int peers_started = 0;
389 * Should we do a PUT (mode = 0) or GET (mode = 1);
400 * Are we shutting down
402 static int in_shutdown = 0;
405 * Total number of times to check if circle is formed or not.
407 static unsigned int tries;
411 * Task that collects successor statistics from all the peers.
416 collect_stats (void *cls);
420 * Connect to DHT services of active peers
423 start_profiling (void);
427 * Shutdown task. Cleanup all resources and operations.
432 do_shutdown (void *cls)
434 struct ActiveContext *ac;
437 in_shutdown = GNUNET_YES;
440 for (cnt=0; cnt < num_peers; cnt++)
442 /* Cleanup active context if this peer is an active peer */
446 if (NULL != ac->delay_task)
447 GNUNET_SCHEDULER_cancel (ac->delay_task);
448 if (NULL != ac->put_data)
449 GNUNET_free (ac->put_data);
450 if (NULL != ac->dht_put)
451 GNUNET_DHT_put_cancel (ac->dht_put);
452 if (NULL != ac->dht_get)
453 GNUNET_DHT_get_stop (ac->dht_get);
455 /* Cleanup testbed operation handle at the last as this operation may
456 contain service connection to DHT */
457 if (NULL != a_ctx[cnt].op)
458 GNUNET_TESTBED_operation_done (a_ctx[cnt].op);
463 //FIXME: Should we collect stats only for put/get not for other messages.
464 if (NULL != bandwidth_stats_op)
466 GNUNET_TESTBED_operation_done (bandwidth_stats_op);
467 bandwidth_stats_op = NULL;
469 if (NULL != successor_stats_op)
471 GNUNET_TESTBED_operation_done (successor_stats_op);
472 successor_stats_op = NULL;
474 if (NULL != successor_stats_task)
476 GNUNET_SCHEDULER_cancel (successor_stats_task);
477 successor_stats_task = NULL;
479 GNUNET_free_non_null (a_ac);
484 * Stats callback. Finish the stats testbed operation and when all stats have
485 * been iterated, shutdown the test.
488 * @param op the operation that has been finished
489 * @param emsg error message in case the operation has failed; will be NULL if
490 * operation has executed successfully.
493 bandwidth_stats_cont (void *cls,
494 struct GNUNET_TESTBED_Operation *op,
497 INFO ("# Outgoing bandwidth: %u\n", outgoing_bandwidth);
498 INFO ("# Incoming bandwidth: %u\n", incoming_bandwidth);
499 GNUNET_SCHEDULER_shutdown ();
504 * Process statistic values.
507 * @param peer the peer the statistic belong to
508 * @param subsystem name of subsystem that created the statistic
509 * @param name the name of the datum
510 * @param value the current value
511 * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
512 * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
515 bandwidth_stats_iterator (void *cls,
516 const struct GNUNET_TESTBED_Peer *peer,
517 const char *subsystem,
522 static const char *s_sent = "# Bytes transmitted to other peers";
523 static const char *s_recv = "# Bytes received from other peers";
525 if (0 == strncmp (s_sent, name, strlen (s_sent)))
526 outgoing_bandwidth = outgoing_bandwidth + value;
527 else if (0 == strncmp(s_recv, name, strlen (s_recv)))
528 incoming_bandwidth = incoming_bandwidth + value;
537 INFO ("# PUTS made: %u\n", n_puts);
538 INFO ("# PUTS succeeded: %u\n", n_puts_ok);
539 INFO ("# PUTS failed: %u\n", n_puts_fail);
540 INFO ("# GETS made: %u\n", n_gets);
541 INFO ("# GETS succeeded: %u\n", n_gets_ok);
542 INFO ("# GETS failed: %u\n", n_gets_fail);
543 INFO ("# average_put_path_length: %f\n", average_put_path_length);
544 INFO ("# average_get_path_length: %f\n", average_get_path_length);
546 if (NULL == testbed_handles)
548 INFO ("No peers found\n");
552 bandwidth_stats_op = GNUNET_TESTBED_get_statistics (n_active, testbed_handles,
554 bandwidth_stats_iterator,
555 bandwidth_stats_cont, NULL);
560 * Task to cancel DHT GET.
565 cancel_get (void *cls)
567 struct ActiveContext *ac = cls;
568 struct Context *ctx = ac->ctx;
570 ac->delay_task = NULL;
571 GNUNET_assert (NULL != ac->dht_get);
572 GNUNET_DHT_get_stop (ac->dht_get);
575 GNUNET_assert (NULL != ctx->op);
576 GNUNET_TESTBED_operation_done (ctx->op);
579 /* If profiling is complete, summarize */
580 if (n_active == n_gets_fail + n_gets_ok)
582 average_put_path_length = (double)total_put_path_length/(double)n_active;
583 average_get_path_length = (double)total_get_path_length/(double )n_gets_ok;
590 * Iterator called on each result obtained for a DHT
591 * operation that expects a reply
594 * @param exp when will this value expire
595 * @param key key of the result
596 * @param get_path peers on reply path (or NULL if not recorded)
597 * [0] = datastore's first neighbor, [length - 1] = local peer
598 * @param get_path_length number of entries in @a get_path
599 * @param put_path peers on the PUT path (or NULL if not recorded)
600 * [0] = origin, [length - 1] = datastore
601 * @param put_path_length number of entries in @a put_path
602 * @param type type of the result
603 * @param size number of bytes in @a data
604 * @param data pointer to the result data
608 struct GNUNET_TIME_Absolute exp,
609 const struct GNUNET_HashCode *key,
610 const struct GNUNET_PeerIdentity *get_path,
611 unsigned int get_path_length,
612 const struct GNUNET_PeerIdentity *put_path,
613 unsigned int put_path_length,
614 enum GNUNET_BLOCK_Type type,
615 size_t size, const void *data)
617 struct ActiveContext *ac = cls;
618 struct ActiveContext *get_ac = ac->get_ac;
619 struct Context *ctx = ac->ctx;
621 /* Check the keys of put and get match or not. */
622 GNUNET_assert (0 == memcmp (key, &get_ac->hash, sizeof (struct GNUNET_HashCode)));
623 /* we found the data we are looking for */
624 DEBUG ("We found a GET request; %u remaining\n", n_gets - (n_gets_fail + n_gets_ok)); //FIXME: It always prints 1.
627 GNUNET_DHT_get_stop (ac->dht_get);
629 if (ac->delay_task != NULL)
630 GNUNET_SCHEDULER_cancel (ac->delay_task);
631 ac->delay_task = NULL;
632 GNUNET_assert (NULL != ctx->op);
633 GNUNET_TESTBED_operation_done (ctx->op);
636 total_put_path_length = total_put_path_length + (double)put_path_length;
637 total_get_path_length = total_get_path_length + (double)get_path_length;
638 DEBUG ("total_put_path_length = %f,put_path \n",total_put_path_length);
639 /* Summarize if profiling is complete */
640 if (n_active == n_gets_fail + n_gets_ok)
642 average_put_path_length = (double)total_put_path_length/(double)n_active;
643 average_get_path_length = (double)total_get_path_length/(double )n_gets_ok;
650 * Task to do DHT GETs
652 * @param cls the active context
655 delayed_get (void *cls)
657 struct ActiveContext *ac = cls;
658 struct ActiveContext *get_ac;
661 ac->delay_task = NULL;
665 r = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, n_active);
667 if (NULL != get_ac->put_data)
672 DEBUG ("GET_REQUEST_START key %s \n", GNUNET_h2s((struct GNUNET_HashCode *)ac->put_data));
673 ac->dht_get = GNUNET_DHT_get_start (ac->dht,
674 GNUNET_BLOCK_TYPE_TEST,
676 1, /* replication level */
678 NULL, 0, /* extended query and size */
679 get_iter, ac); /* GET iterator and closure
683 /* schedule the timeout task for GET */
684 ac->delay_task = GNUNET_SCHEDULER_add_delayed (timeout, &cancel_get, ac);
689 * Task to teardown the dht connection. We do it as a task because calling
690 * GNUNET_DHT_disconnect() from put_continutation_callback seems illegal (the
691 * put_continuation_callback() is getting called again synchronously). Also,
692 * only free the operation when we are not shutting down; the shutdown task will
693 * clear the operation during shutdown.
695 * @param cls the context
698 teardown_dht_connection (void *cls)
700 struct Context *ctx = cls;
701 struct GNUNET_TESTBED_Operation *op;
703 GNUNET_assert (NULL != ctx);
704 GNUNET_assert (NULL != (op = ctx->op));
706 GNUNET_TESTBED_operation_done (op);
711 * Queue up a delayed task for doing DHT GET
713 * @param cls the active context
714 * @param success #GNUNET_OK if the PUT was transmitted,
715 * #GNUNET_NO on timeout,
716 * #GNUNET_SYSERR on disconnect from service
717 * after the PUT message was transmitted
718 * (so we don't know if it was received or not)
721 put_cont (void *cls, int success)
723 struct ActiveContext *ac = cls;
724 struct Context *ctx = ac->ctx;
731 GNUNET_assert (NULL != ctx);
732 (void) GNUNET_SCHEDULER_add_now (&teardown_dht_connection, ctx);
737 * Task to do DHT PUTs
739 * @param cls the active context
742 delayed_put (void *cls)
744 struct ActiveContext *ac = cls;
746 ac->delay_task = NULL;
747 /* Generate and DHT PUT some random data */
748 ac->put_data_size = 16; /* minimum */
749 ac->put_data_size += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
751 ac->put_data = GNUNET_malloc (ac->put_data_size);
752 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
753 ac->put_data, ac->put_data_size);
754 GNUNET_CRYPTO_hash (ac->put_data, ac->put_data_size, &ac->hash);
755 DEBUG ("PUT_REQUEST_START key %s \n", GNUNET_h2s((struct GNUNET_HashCode *)ac->put_data));
756 ac->dht_put = GNUNET_DHT_put (ac->dht, &ac->hash,
758 GNUNET_DHT_RO_RECORD_ROUTE,
759 GNUNET_BLOCK_TYPE_TEST,
762 GNUNET_TIME_UNIT_FOREVER_ABS, /* expiration time */
763 timeout, /* PUT timeout */
764 put_cont, ac); /* continuation and its closure */
770 * Connection to DHT has been established. Call the delay task.
772 * @param cls the active context
773 * @param op the operation that has been finished
774 * @param ca_result the service handle returned from GNUNET_TESTBED_ConnectAdapter()
775 * @param emsg error message in case the operation has failed; will be NULL if
776 * operation has executed successfully.
779 dht_connected (void *cls,
780 struct GNUNET_TESTBED_Operation *op,
784 struct ActiveContext *ac = cls;
785 struct Context *ctx = ac->ctx;
787 GNUNET_assert (NULL != ctx); //FIXME: Fails
788 GNUNET_assert (NULL != ctx->op);
789 GNUNET_assert (ctx->op == op);
790 ac->dht = (struct GNUNET_DHT_Handle *) ca_result;
793 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Connection to DHT service failed: %s\n", emsg);
794 GNUNET_TESTBED_operation_done (ctx->op); /* Calls dht_disconnect() */
802 struct GNUNET_TIME_Relative peer_delay_put;
803 peer_delay_put.rel_value_us =
804 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
805 delay_put.rel_value_us);
806 ac->delay_task = GNUNET_SCHEDULER_add_delayed (peer_delay_put, &delayed_put, ac);
811 struct GNUNET_TIME_Relative peer_delay_get;
812 peer_delay_get.rel_value_us =
813 delay_get.rel_value_us +
814 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
815 delay_get.rel_value_us);
816 ac->delay_task = GNUNET_SCHEDULER_add_delayed (peer_delay_get, &delayed_get, ac);
824 * Connect to DHT service and return the DHT client handler
826 * @param cls the active context
827 * @param cfg configuration of the peer to connect to; will be available until
828 * GNUNET_TESTBED_operation_done() is called on the operation returned
829 * from GNUNET_TESTBED_service_connect()
830 * @return service handle to return in 'op_result', NULL on error
833 dht_connect (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg)
836 return GNUNET_DHT_connect (cfg, 10);
841 * Adapter function called to destroy a connection to
844 * @param cls the active context
845 * @param op_result service handle returned from the connect adapter
848 dht_disconnect (void *cls, void *op_result)
850 struct ActiveContext *ac = cls;
852 GNUNET_assert (NULL != ac->dht);
853 GNUNET_assert (ac->dht == op_result);
854 GNUNET_DHT_disconnect (ac->dht);
859 if (GNUNET_YES == in_shutdown)
864 if ((n_puts_ok + n_puts_fail) != n_active)
866 /* Start GETs if all PUTs have been made */
868 //(void) GNUNET_SCHEDULER_add_now (&call_start_profiling, NULL);
872 if ((n_gets_ok + n_gets_fail) != n_active)
879 * Connect to DHT services of active peers
887 DEBUG("GNUNET_TESTBED_service_connect \n");
888 GNUNET_break (GNUNET_YES != in_shutdown);
889 for(i = 0; i < n_active; i++)
891 struct ActiveContext *ac = &a_ac[i];
892 GNUNET_assert (NULL != (ctx = ac->ctx));
893 GNUNET_assert (NULL == ctx->op);
895 GNUNET_TESTBED_service_connect (ctx,
907 * Count of total number of malicious peers.
909 static unsigned int count_malicious;
912 * Continuation of GNUNET_DHT_act_malicious
913 * @param cls Malicious context
914 * @param success #GNUNET_OK if the ACT_MALICIOUS was transmitted,
915 * #GNUNET_NO on timeout,
916 * #GNUNET_SYSERR on disconnect from service
917 * after the ACT_MALICIOUS message was transmitted
918 * (so we don't know if it was received or not)
921 act_malicious_cont (void *cls, int success)
923 struct MaliciousContext *mc = cls;
924 struct Context *ctx = mc->ctx;
926 GNUNET_TESTBED_operation_done (ctx->op);
933 * Call malicious API for all the malicious peers.
934 * @param cls the malicious context.
935 * @param op the operation that has been finished
936 * @param ca_result the service handle returned from GNUNET_TESTBED_ConnectAdapter()
937 * @param emsg error message in case the operation has failed; will be NULL if
938 * operation has executed successfully.
941 dht_set_malicious(void *cls,
942 struct GNUNET_TESTBED_Operation *op,
946 struct MaliciousContext *mc = cls;
947 struct Context *ctx = mc->ctx;
949 GNUNET_assert (NULL != ctx);
950 GNUNET_assert (NULL != ctx->op);
951 GNUNET_assert (ctx->op == op);
952 mc->dht = (struct GNUNET_DHT_Handle *) ca_result;
955 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Connection to DHT service failed: %s\n", emsg);
956 GNUNET_TESTBED_operation_done (ctx->op); /* Calls dht_disconnect_malicious() */
960 mc->dht_malicious = GNUNET_DHT_act_malicious(mc->dht, 1, act_malicious_cont, mc);
965 * Adapter function called to destroy a connection to
968 * @param cls the active context
969 * @param op_result service handle returned from the connect adapter
972 dht_disconnect_malicious (void *cls, void *op_result)
974 struct MaliciousContext *mc = cls;
976 GNUNET_assert (NULL != mc->dht);
977 GNUNET_assert (mc->dht == op_result);
978 GNUNET_DHT_disconnect (mc->dht);
986 if(n_malicious == count_malicious)
988 DEBUG("\n Call start_profiling()");
995 * Set the malicious variable in peer malicious context.
1002 DEBUG ("Setting %u peers malicious",
1004 for(i = 0; i < n_malicious; i++)
1006 struct MaliciousContext *mc = &a_mc[i];
1008 GNUNET_TESTBED_service_connect (mc->ctx,
1011 &dht_set_malicious, mc,
1013 &dht_disconnect_malicious,
1022 * Start collecting relevant statistics. If ENABLE_MALICIOUS set, first
1023 * set the malicious peers. If not, then start with PUT operation on active
1029 #if ENABLE_MALICIOUS
1038 * Remove entry from successor peer hashmap.
1039 * @param cls closure
1040 * @param key current public key
1041 * @param value value in the hash map
1042 * @return #GNUNET_YES if we should continue to iterate,
1043 * #GNUNET_NO if not.
1046 hashmap_iterate_remove(void *cls,
1047 const struct GNUNET_HashCode *key,
1050 GNUNET_assert (GNUNET_YES ==
1051 GNUNET_CONTAINER_multihashmap_remove(successor_peer_hashmap, key, value));
1057 * Stats callback. Iterate over the hashmap and check if all th peers form
1058 * a virtual ring topology.
1060 * @param cls closure
1061 * @param op the operation that has been finished
1062 * @param emsg error message in case the operation has failed; will be NULL if
1063 * operation has executed successfully.
1066 successor_stats_cont (void *cls,
1067 struct GNUNET_TESTBED_Operation *op,
1070 struct GNUNET_HashCode *val;
1071 struct GNUNET_HashCode *start_val;
1072 struct GNUNET_HashCode *key;
1075 /* Don't schedule the task till we are looking for circle here. */
1076 successor_stats_task = NULL;
1077 GNUNET_TESTBED_operation_done (successor_stats_op);
1078 successor_stats_op = NULL;
1079 if (0 == max_searches)
1085 GNUNET_assert (NULL != start_key);
1086 start_val = GNUNET_CONTAINER_multihashmap_get (successor_peer_hashmap,
1088 GNUNET_assert (NULL != start_val);
1090 for (count = 0; count < num_peers; count++)
1093 val = GNUNET_CONTAINER_multihashmap_get (successor_peer_hashmap,
1097 /* Remove the entry from hashmap. This is done to take care of loop. */
1099 GNUNET_CONTAINER_multihashmap_remove (successor_peer_hashmap,
1102 DEBUG ("Failed to remove entry from hashmap\n");
1105 /* If a peer has its own identity as its successor. */
1106 if (0 == memcmp(key, val, sizeof (struct GNUNET_HashCode)))
1110 GNUNET_assert (GNUNET_SYSERR !=
1111 GNUNET_CONTAINER_multihashmap_iterate (successor_peer_hashmap,
1112 &hashmap_iterate_remove,
1115 successor_peer_hashmap = GNUNET_CONTAINER_multihashmap_create (num_peers,
1117 if ((start_val == val) && (count == num_peers))
1119 DEBUG ("CIRCLE COMPLETED after %u tries", tries);
1120 if(NULL == successor_stats_task)
1126 if (max_searches == ++tries)
1128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1129 "Maximum tries %u exceeded while checking successor TOTAL TRIES %u"
1130 " circle formation. Exiting\n",
1131 max_searches,tries);
1136 successor_stats_task
1137 = GNUNET_SCHEDULER_add_delayed (delay_stats,
1144 * Process successor statistic values.
1146 * @param cls closure
1147 * @param peer the peer the statistic belong to
1148 * @param subsystem name of subsystem that created the statistic
1149 * @param name the name of the datum
1150 * @param value the current value
1151 * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
1152 * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
1155 successor_stats_iterator (void *cls,
1156 const struct GNUNET_TESTBED_Peer *peer,
1157 const char *subsystem,
1162 static const char *key_string = "XDHT";
1163 if (0 == max_searches)
1166 if (0 == strncmp (key_string, name, strlen (key_string)))
1169 char successor_str[13];
1170 char truncated_my_id_str[13];
1171 char truncated_successor_str[13];
1172 struct GNUNET_HashCode *my_id_key;
1173 struct GNUNET_HashCode *succ_key;
1175 strtok((char *)name,":");
1176 my_id_str = strtok(NULL,":");
1178 strncpy(truncated_my_id_str, my_id_str, 12);
1179 truncated_my_id_str[12] = '\0';
1180 my_id_key = GNUNET_new(struct GNUNET_HashCode);
1181 GNUNET_CRYPTO_hash (truncated_my_id_str, sizeof(truncated_my_id_str),my_id_key);
1182 GNUNET_STRINGS_data_to_string(&value, sizeof(uint64_t), successor_str, 13);
1183 strncpy(truncated_successor_str, successor_str, 12);
1184 truncated_successor_str[12] ='\0';
1186 succ_key = GNUNET_new(struct GNUNET_HashCode);
1187 GNUNET_CRYPTO_hash (truncated_successor_str, sizeof(truncated_successor_str),succ_key);
1191 GNUNET_assert(NULL != my_id_key);
1192 start_key = my_id_key;
1193 GNUNET_assert(NULL != start_key);
1196 GNUNET_CONTAINER_multihashmap_put (successor_peer_hashmap,
1197 my_id_key, (void *)succ_key,
1198 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1206 * Task that collects peer and its corresponding successors.
1208 * @param cls Closure (NULL).
1211 collect_stats (void *cls)
1213 successor_stats_task = NULL;
1214 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1215 "Start collecting statistics...\n");
1216 GNUNET_assert(NULL != testbed_handles);
1218 if (0 != max_searches)
1219 successor_peer_hashmap
1220 = GNUNET_CONTAINER_multihashmap_create (num_peers,
1223 = GNUNET_TESTBED_get_statistics (num_peers, testbed_handles,
1225 successor_stats_iterator,
1226 successor_stats_cont, cls);
1227 GNUNET_assert (NULL != successor_stats_op);
1232 * Callback called when DHT service on the peer is started
1234 * @param cls the context
1235 * @param op the operation that has been finished
1236 * @param emsg error message in case the operation has failed; will be NULL if
1237 * operation has executed successfully.
1240 service_started (void *cls,
1241 struct GNUNET_TESTBED_Operation *op,
1244 struct Context *ctx = cls;
1246 GNUNET_assert (NULL != ctx);
1247 GNUNET_assert (NULL != ctx->op);
1248 GNUNET_TESTBED_operation_done (ctx->op);
1251 DEBUG("Peers Started = %d; num_peers = %d \n", peers_started, num_peers);
1252 if (NULL == successor_stats_task && peers_started == num_peers)
1254 DEBUG("successor_stats_task \n");
1255 struct Collect_Stat_Context *collect_stat_cls = GNUNET_new(struct Collect_Stat_Context);
1256 collect_stat_cls->service_connect_ctx = cls;
1257 collect_stat_cls->op = op;
1259 successor_stats_task
1260 = GNUNET_SCHEDULER_add_delayed (delay_stats,
1268 * Signature of a main function for a testcase.
1270 * @param cls closure
1271 * @param h the run handle
1272 * @param num_peers number of peers in 'peers'
1273 * @param peers handle to peers run in the testbed
1274 * @param links_succeeded the number of overlay link connection attempts that
1276 * @param links_failed the number of overlay link
1279 test_run (void *cls,
1280 struct GNUNET_TESTBED_RunHandle *h,
1281 unsigned int num_peers, struct GNUNET_TESTBED_Peer **peers,
1282 unsigned int links_succeeded,
1283 unsigned int links_failed)
1286 unsigned int ac_cnt;
1287 testbed_handles = peers;
1293 INFO ("%u peers started\n", num_peers);
1294 a_ctx = GNUNET_malloc (sizeof (struct Context) * num_peers);
1296 /* select the peers which actively participate in profiling */
1297 n_active = num_peers * PUT_PROBABILITY / 100;
1300 GNUNET_SCHEDULER_shutdown ();
1301 GNUNET_free (a_ctx);
1305 a_ac = GNUNET_malloc (n_active * sizeof (struct ActiveContext));
1308 #if ENABLE_MALICIOUS
1309 unsigned int malicious_peers;
1310 if(PUT_PROBABILITY + MALICIOUS_PROBABILITY > 100)
1312 DEBUG ("Reduce either number of malicious peer or active peers. ");
1313 GNUNET_SCHEDULER_shutdown ();
1314 GNUNET_free (a_ctx);
1318 /* Select the peers which should act maliciously. */
1319 n_malicious = num_peers * MALICIOUS_PROBABILITY / 100;
1321 a_mc = GNUNET_malloc (n_malicious * sizeof (struct MaliciousContext));
1322 malicious_peers = 0;
1324 for (cnt = 0; cnt < num_peers && malicious_peers < n_malicious; cnt++)
1326 if (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100) >=
1327 MALICIOUS_PROBABILITY)
1329 a_ctx[cnt].mc = &a_mc[malicious_peers];
1330 a_mc[malicious_peers].ctx = &a_ctx[cnt];
1333 n_malicious = malicious_peers;
1334 INFO ("Malicious Peers: %u\n",malicious_peers);
1338 a_ac = GNUNET_malloc (n_active * sizeof (struct ActiveContext));
1340 for (cnt = 0; cnt < num_peers && ac_cnt < n_active; cnt++)
1342 if ((GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100) >=
1346 #if ENABLE_MALICIOUS
1347 if(a_ctx[ac_cnt].mc != NULL)
1351 a_ctx[cnt].ac = &a_ac[ac_cnt];
1352 a_ac[ac_cnt].ctx = &a_ctx[cnt];
1356 INFO ("Active peers: %u\n", n_active);
1358 /* start DHT service on all peers */
1359 for (cnt = 0; cnt < num_peers; cnt++)
1361 a_ctx[cnt].peer = peers[cnt];
1362 a_ctx[cnt].op = GNUNET_TESTBED_peer_manage_service (&a_ctx[cnt],
1373 * Main function that will be run by the scheduler.
1375 * @param cls closure
1376 * @param args remaining command-line arguments
1377 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
1378 * @param config configuration
1381 run (void *cls, char *const *args, const char *cfgfile,
1382 const struct GNUNET_CONFIGURATION_Handle *config)
1384 uint64_t event_mask;
1388 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1389 _("Exiting as the number of peers is %u\n"),
1393 cfg = GNUNET_CONFIGURATION_dup (config);
1395 GNUNET_TESTBED_run (hosts_file, cfg, num_peers, event_mask, NULL,
1396 NULL, &test_run, NULL);
1397 GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
1405 * @return 0 on success
1408 main (int argc, char *const *argv)
1412 static struct GNUNET_GETOPT_CommandLineOption options[] = {
1413 {'n', "peers", "COUNT",
1414 gettext_noop ("number of peers to start"),
1415 1, &GNUNET_GETOPT_set_uint, &num_peers},
1416 {'s', "searches", "COUNT",
1417 gettext_noop ("maximum number of times we try to search for successor circle formation (0 for R5N)"),
1418 1, &GNUNET_GETOPT_set_uint, &max_searches},
1419 {'H', "hosts", "FILENAME",
1420 gettext_noop ("name of the file with the login information for the testbed"),
1421 1, &GNUNET_GETOPT_set_string, &hosts_file},
1422 {'D', "delay", "DELAY",
1423 gettext_noop ("delay between rounds for collecting statistics (default: 30 sec)"),
1424 1, &GNUNET_GETOPT_set_relative_time, &delay_stats},
1425 {'P', "PUT-delay", "DELAY",
1426 gettext_noop ("delay to start doing PUTs (default: 1 sec)"),
1427 1, &GNUNET_GETOPT_set_relative_time, &delay_put},
1428 {'G', "GET-delay", "DELAY",
1429 gettext_noop ("delay to start doing GETs (default: 5 min)"),
1430 1, &GNUNET_GETOPT_set_relative_time, &delay_get},
1431 {'r', "replication", "DEGREE",
1432 gettext_noop ("replication degree for DHT PUTs"),
1433 1, &GNUNET_GETOPT_set_uint, &replication},
1434 {'t', "timeout", "TIMEOUT",
1435 gettext_noop ("timeout for DHT PUT and GET requests (default: 1 min)"),
1436 1, &GNUNET_GETOPT_set_relative_time, &timeout},
1437 GNUNET_GETOPT_OPTION_END
1441 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
1443 /* set default delays */
1444 delay_stats = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
1445 delay_put = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
1446 delay_get = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
1447 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
1448 replication = 1; /* default replication */
1451 GNUNET_PROGRAM_run (argc, argv, "dht-profiler",
1453 ("Measure quality and performance of the DHT service."),
1454 options, &run, NULL))