2 This file is part of GNUnet.
3 (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
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.
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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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16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 * @file gns/gnunet-gns-lookup.c
22 * @brief search for records in GNS
23 * @author Martin Schanzenbach
26 #include "gnunet_gns_service.h"
29 * The type of the query
31 static unsigned int query_type;
34 * Desired replication level
36 static unsigned int replication = 5;
39 * The key for the query
41 static char *query_key;
44 * User supplied timeout value (in seconds)
46 static unsigned long long timeout_request = 5;
49 * When this request should really die
51 struct GNUNET_TIME_Absolute absolute_timeout;
61 static struct GNUNET_GNS_Handle *gns_handle;
64 * Global handle of the configuration
66 static const struct GNUNET_CONFIGURATION_Handle *cfg;
69 * Handle for the lookup request
71 static struct GNUNET_GNS_LookupHandle *lookup_handle;
80 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
82 if (gns_handle != NULL)
84 GNUNET_GNS_disconnect (gns_handle);
91 cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
93 if (lookup_handle != NULL)
95 GNUNET_GNS_lookup_stop (lookup_handle);
98 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
103 * Iterator called on each result obtained for a GNS
104 * operation that expects a reply
107 * @param exp when will this value expire
108 * @param key key of the result
109 * @param get_path peers on reply path (or NULL if not recorded)
110 * @param get_path_length number of entries in get_path
111 * @param put_path peers on the PUT path (or NULL if not recorded)
112 * @param put_path_length number of entries in get_path
113 * @param type type of the result
114 * @param size number of bytes in data
115 * @param data pointer to the result data
118 lookup_result_iterator (void *cls,
120 const struct GNUNET_GNS_Record *record,
121 unsigned int num_records)
123 FPRINTF (stdout, "%d results for %s\n", num_records, name);
128 * Main function that will be run by the scheduler.
131 * @param args remaining command-line arguments
132 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
133 * @param c configuration
136 run (void *cls, char *const *args, const char *cfgfile,
137 const struct GNUNET_CONFIGURATION_Handle *c)
139 struct GNUNET_TIME_Relative timeout;
143 if (query_key == NULL)
146 FPRINTF (stderr, "%s", "Must provide key for GNS lookup!\n");
151 gns_handle = GNUNET_GNS_connect (cfg, 1);
153 if (gns_handle == NULL)
156 FPRINTF (stderr, "%s", "Couldn't connect to GNS service!\n");
161 FPRINTF (stderr, "%s", "Connected to GNS service!\n");
164 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, timeout_request);
165 absolute_timeout = GNUNET_TIME_relative_to_absolute (timeout);
168 FPRINTF (stderr, "Issuing lookup request for %s!\n", query_key);
169 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
170 (absolute_timeout), &cleanup_task, NULL);
172 GNUNET_GNS_lookup_start (gns_handle, timeout, query_key,
174 &lookup_result_iterator,
181 * gnunet-dht-get command line options
183 static struct GNUNET_GETOPT_CommandLineOption options[] = {
185 gettext_noop ("the query key"),
186 1, &GNUNET_GETOPT_set_string, &query_key},
187 {'r', "replication", "LEVEL",
188 gettext_noop ("how many parallel requests (replicas) to create"),
189 1, &GNUNET_GETOPT_set_uint, &replication},
190 {'t', "type", "TYPE",
191 gettext_noop ("the type of data to look for"),
192 1, &GNUNET_GETOPT_set_uint, &query_type},
193 {'T', "timeout", "TIMEOUT",
194 gettext_noop ("how long to execute this query before giving up?"),
195 1, &GNUNET_GETOPT_set_ulong, &timeout_request},
196 {'V', "verbose", NULL,
197 gettext_noop ("be verbose (print progress information)"),
198 0, &GNUNET_GETOPT_set_one, &verbose},
199 GNUNET_GETOPT_OPTION_END
204 * Entry point for gnunet-gns-lookup
206 * @param argc number of arguments from the command line
207 * @param argv command line arguments
208 * @return 0 ok, 1 on error
211 main (int argc, char *const *argv)
214 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-get",
216 ("Issue a request to the GNUnet Naming System, prints results."),
217 options, &run, NULL)) ? ret : 1;
220 /* end of gnunet-gns-lookup.c */