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.
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.
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.
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"
30 * The type of the query
32 static unsigned int query_type;
35 * Desired replication level
37 static unsigned int replication = 5;
40 * The key for the query
42 static char *query_key;
45 * User supplied timeout value
47 static struct GNUNET_TIME_Relative timeout_request = { 60000 };
55 * Use DHT demultixplex_everywhere
57 static int demultixplex_everywhere;
62 static struct GNUNET_DHT_Handle *dht_handle;
65 * Global handle of the configuration
67 static const struct GNUNET_CONFIGURATION_Handle *cfg;
70 * Handle for the get request
72 static struct GNUNET_DHT_GetHandle *get_handle;
75 * Count of results found
77 static unsigned int result_count;
86 * Task run to clean up on timeout.
92 cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
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;
154 if (NULL == query_key)
156 FPRINTF (stderr, "%s", _("Must provide key for DHT GET!\n"));
160 if (NULL == (dht_handle = GNUNET_DHT_connect (cfg, 1)))
162 FPRINTF (stderr, "%s", _("Failed to connect to DHT service!\n"));
166 if (query_type == GNUNET_BLOCK_TYPE_ANY) /* Type of data not set */
167 query_type = GNUNET_BLOCK_TYPE_TEST;
168 GNUNET_CRYPTO_hash (query_key, strlen (query_key), &key);
170 FPRINTF (stderr, "%s `%s' \n", _("Issueing DHT GET with key"), GNUNET_h2s_full (&key));
171 GNUNET_SCHEDULER_add_delayed (timeout_request,
172 &cleanup_task, NULL);
174 GNUNET_DHT_get_start (dht_handle, query_type, &key, replication,
175 (demultixplex_everywhere) ? GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE : GNUNET_DHT_RO_NONE,
176 NULL, 0, &get_result_iterator, NULL);
182 * gnunet-dht-get command line options
184 static struct GNUNET_GETOPT_CommandLineOption options[] = {
186 gettext_noop ("the query key"),
187 1, &GNUNET_GETOPT_set_string, &query_key},
188 {'r', "replication", "LEVEL",
189 gettext_noop ("how many parallel requests (replicas) to create"),
190 1, &GNUNET_GETOPT_set_uint, &replication},
191 {'t', "type", "TYPE",
192 gettext_noop ("the type of data to look for"),
193 1, &GNUNET_GETOPT_set_uint, &query_type},
194 {'T', "timeout", "TIMEOUT",
195 gettext_noop ("how long to execute this query before giving up?"),
196 1, &GNUNET_GETOPT_set_relative_time, &timeout_request},
197 {'x', "demultiplex", NULL,
198 gettext_noop ("use DHT's demultiplex everywhere option"),
199 0, &GNUNET_GETOPT_set_one, &demultixplex_everywhere},
200 {'V', "verbose", NULL,
201 gettext_noop ("be verbose (print progress information)"),
202 0, &GNUNET_GETOPT_set_one, &verbose},
203 GNUNET_GETOPT_OPTION_END
208 * Entry point for gnunet-dht-get
210 * @param argc number of arguments from the command line
211 * @param argv command line arguments
212 * @return 0 ok, 1 on error
215 main (int argc, char *const *argv)
217 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
220 GNUNET_PROGRAM_run (argc, argv, "gnunet-dht-get",
222 ("Issue a GET request to the GNUnet DHT, prints results."),
223 options, &run, NULL)) ? ret : 1;
226 /* end of gnunet-dht-get.c */