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21 * @file dht/gnunet-dht-get.c
22 * @brief search for data in DHT
23 * @author Christian Grothoff
24 * @author Nathan Evans
27 #include "gnunet_dht_service.h"
29 #define LOG(kind,...) GNUNET_log_from (kind, "dht-clients",__VA_ARGS__)
31 * The type of the query
33 static unsigned int query_type;
36 * Desired replication level
38 static unsigned int replication = 5;
41 * The key for the query
43 static char *query_key;
46 * User supplied timeout value
48 static struct GNUNET_TIME_Relative timeout_request = { 60000 };
56 * Use DHT demultixplex_everywhere
58 static int demultixplex_everywhere;
63 static struct GNUNET_DHT_Handle *dht_handle;
66 * Global handle of the configuration
68 static const struct GNUNET_CONFIGURATION_Handle *cfg;
71 * Handle for the get request
73 static struct GNUNET_DHT_GetHandle *get_handle;
76 * Count of results found
78 static unsigned int result_count;
87 * Task run to clean up on timeout.
92 cleanup_task (void *cls)
94 if (NULL != get_handle)
96 GNUNET_DHT_get_stop (get_handle);
99 if (NULL != dht_handle)
101 GNUNET_DHT_disconnect (dht_handle);
108 * Iterator called on each result obtained for a DHT
109 * operation that expects a reply
112 * @param exp when will this value expire
113 * @param key key of the result
114 * @param get_path peers on reply path (or NULL if not recorded)
115 * @param get_path_length number of entries in get_path
116 * @param put_path peers on the PUT path (or NULL if not recorded)
117 * @param put_path_length number of entries in get_path
118 * @param type type of the result
119 * @param size number of bytes in data
120 * @param data pointer to the result data
123 get_result_iterator (void *cls, struct GNUNET_TIME_Absolute exp,
124 const struct GNUNET_HashCode * key,
125 const struct GNUNET_PeerIdentity *get_path,
126 unsigned int get_path_length,
127 const struct GNUNET_PeerIdentity *put_path,
128 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
129 size_t size, const void *data)
132 _("Result %d, type %d:\n%.*s\n"),
134 (unsigned int) size, (char *) data);
140 * Main function that will be run by the scheduler.
143 * @param args remaining command-line arguments
144 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
145 * @param c configuration
148 run (void *cls, char *const *args, const char *cfgfile,
149 const struct GNUNET_CONFIGURATION_Handle *c)
151 struct GNUNET_HashCode key;
156 if (NULL == query_key)
158 FPRINTF (stderr, "%s", _("Must provide key for DHT GET!\n"));
162 if (NULL == (dht_handle = GNUNET_DHT_connect (cfg, 1)))
164 FPRINTF (stderr, "%s", _("Failed to connect to DHT service!\n"));
168 if (query_type == GNUNET_BLOCK_TYPE_ANY) /* Type of data not set */
169 query_type = GNUNET_BLOCK_TYPE_TEST;
170 GNUNET_CRYPTO_hash (query_key, strlen (query_key), &key);
172 FPRINTF (stderr, "%s `%s' \n", _("Issueing DHT GET with key"), GNUNET_h2s_full (&key));
173 GNUNET_SCHEDULER_add_delayed (timeout_request,
174 &cleanup_task, NULL);
176 GNUNET_DHT_get_start (dht_handle, query_type, &key, replication,
177 (demultixplex_everywhere) ? GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE : GNUNET_DHT_RO_NONE,
178 NULL, 0, &get_result_iterator, NULL);
184 * gnunet-dht-get command line options
186 static struct GNUNET_GETOPT_CommandLineOption options[] = {
188 gettext_noop ("the query key"),
189 1, &GNUNET_GETOPT_set_string, &query_key},
190 {'r', "replication", "LEVEL",
191 gettext_noop ("how many parallel requests (replicas) to create"),
192 1, &GNUNET_GETOPT_set_uint, &replication},
193 {'t', "type", "TYPE",
194 gettext_noop ("the type of data to look for"),
195 1, &GNUNET_GETOPT_set_uint, &query_type},
196 {'T', "timeout", "TIMEOUT",
197 gettext_noop ("how long to execute this query before giving up?"),
198 1, &GNUNET_GETOPT_set_relative_time, &timeout_request},
199 {'x', "demultiplex", NULL,
200 gettext_noop ("use DHT's demultiplex everywhere option"),
201 0, &GNUNET_GETOPT_set_one, &demultixplex_everywhere},
202 {'V', "verbose", NULL,
203 gettext_noop ("be verbose (print progress information)"),
204 0, &GNUNET_GETOPT_set_one, &verbose},
205 GNUNET_GETOPT_OPTION_END
210 * Entry point for gnunet-dht-get
212 * @param argc number of arguments from the command line
213 * @param argv command line arguments
214 * @return 0 ok, 1 on error
217 main (int argc, char *const *argv)
219 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
222 GNUNET_PROGRAM_run (argc, argv, "gnunet-dht-get",
224 ("Issue a GET request to the GNUnet DHT, prints results."),
225 options, &run, NULL)) ? ret : 1;
228 /* end of gnunet-dht-get.c */