2 This file is part of GNUnet.
3 (C) 2012, 2013 Christian Grothoff
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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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.
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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,
18 Boston, MA 02111-1307, USA.
22 * @file regex/gnunet-daemon-regexprofiler.c
23 * @brief daemon that uses mesh to announce a regular expression. Used in
24 * conjunction with gnunet-regex-profiler to announce regexes on serveral peers
25 * without the need to explicitly connect to the mesh service running on the
26 * peer from within the profiler.
27 * @author Maximilian Szengel
28 * @author Bartlomiej Polot
31 #include "gnunet_util_lib.h"
32 #include "gnunet_regex_lib.h"
33 #include "gnunet_dht_service.h"
34 #include "gnunet_statistics_service.h"
37 * Return value from 'main'.
39 static int global_ret;
42 * Configuration we use.
44 static const struct GNUNET_CONFIGURATION_Handle *cfg;
47 * Handle to the statistics service.
49 static struct GNUNET_STATISTICS_Handle *stats_handle;
54 static struct GNUNET_DHT_Handle *dht_handle;
57 * Peer's regex announce handle.
59 static struct GNUNET_REGEX_announce_handle *announce_handle;
62 * Hostkey generation context
64 static struct GNUNET_CRYPTO_RsaKeyGenerationContext *keygen;
67 * Periodically reannounce regex.
69 static GNUNET_SCHEDULER_TaskIdentifier reannounce_task;
72 * How often reannounce regex.
74 static struct GNUNET_TIME_Relative reannounce_freq;
77 * Local peer's PeerID.
79 static struct GNUNET_PeerIdentity my_full_id;
82 * Maximal path compression length for regex announcing.
84 static unsigned long long max_path_compression;
87 * Name of the file containing policies that this peer should announce. One
90 static char * policy_filename;
93 * Prefix to add before every regex we're announcing.
95 static char * regex_prefix;
100 static char *rx_with_pfx;
104 * Task run during shutdown.
110 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
116 GNUNET_CRYPTO_rsa_key_create_stop (keygen);
119 if (NULL != announce_handle)
121 GNUNET_REGEX_announce_cancel (announce_handle);
122 announce_handle = NULL;
125 if (NULL != dht_handle)
127 GNUNET_DHT_disconnect (dht_handle);
131 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
136 * Announce a previously announced regex re-using cached data.
138 * @param cls Clocuse (not used).
139 * @param tc TaskContext.
142 reannounce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
144 reannounce_task = GNUNET_SCHEDULER_NO_TASK;
145 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
147 reannounce_task = GNUNET_SCHEDULER_add_delayed(reannounce_freq,
154 * Announce the given regular expression using Mesh and the path compression
155 * length read from config.
157 * @param regex regular expression to announce on this peer's mesh.
160 announce_regex (const char * regex)
162 if (NULL == regex || 0 == strlen (regex))
164 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Cannot announce empty regex\n");
168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Announcing regex: %s\n", regex);
169 GNUNET_STATISTICS_update (stats_handle, "# regexes announced", 1, GNUNET_NO);
170 announce_handle = GNUNET_REGEX_announce (dht_handle,
173 (unsigned int) max_path_compression,
175 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == reannounce_task);
176 reannounce_task = GNUNET_SCHEDULER_add_delayed (reannounce_freq,
183 * Load regular expressions from filename into 'rxes' array. Array needs to be freed.
185 * @param filename filename of the file containing the regexes, one per line.
186 * @param rx string with the union of all regular expressions.
188 * @return number of regular expressions read from filename and in rxes array.
189 * FIXME use load regex lib function
192 load_regexes (const char *filename, char **rx)
200 if (GNUNET_YES != GNUNET_DISK_file_test (policy_filename))
202 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
203 "Could not find policy file %s\n", policy_filename);
206 if (GNUNET_OK != GNUNET_DISK_file_size (policy_filename, &filesize, GNUNET_YES, GNUNET_YES))
210 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Policy file %s is empty.\n", policy_filename);
213 data = GNUNET_malloc (filesize);
214 if (filesize != GNUNET_DISK_fn_read (policy_filename, data, filesize))
217 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Could not read policy file %s.\n",
224 while (offset < (filesize - 1))
227 if ((data[offset] == '\n') && (buf != &data[offset]))
230 buf = &data[offset + 1];
233 else if ((data[offset] == '\n') || (data[offset] == '\0'))
234 buf = &data[offset + 1];
244 * Callback for hostkey read/generation
246 * @param cls Closure (not used).
247 * @param pk The private key of the local peer.
248 * @param emsg Error message if applicable.
251 key_generation_cb (void *cls,
252 struct GNUNET_CRYPTO_RsaPrivateKey *pk,
255 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
260 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
261 _("Regexprofiler could not access hostkey: %s. Exiting.\n"),
263 GNUNET_SCHEDULER_shutdown ();
267 GNUNET_CRYPTO_rsa_key_get_public (pk, &my_public_key);
268 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
269 &my_full_id.hashPubKey);
271 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
272 "Regexprofiler for peer [%s] starting\n",
273 GNUNET_i2s(&my_full_id));
274 announce_regex (rx_with_pfx);
275 GNUNET_free (rx_with_pfx);
280 * @brief Main function that will be run by the scheduler.
283 * @param args remaining command-line arguments
284 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
285 * @param cfg_ configuration
288 run (void *cls, char *const *args GNUNET_UNUSED,
289 const char *cfgfile GNUNET_UNUSED,
290 const struct GNUNET_CONFIGURATION_Handle *cfg_)
298 GNUNET_CONFIGURATION_get_value_filename (cfg, "GNUNETD", "HOSTKEY",
301 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
303 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
304 "regexprofiler", "hostkey");
305 GNUNET_SCHEDULER_shutdown ();
310 GNUNET_CONFIGURATION_get_value_number (cfg, "REGEXPROFILER", "MAX_PATH_COMPRESSION",
311 &max_path_compression))
313 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
315 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
316 "regexprofiler", "max_path_compression");
317 global_ret = GNUNET_SYSERR;
318 GNUNET_SCHEDULER_shutdown ();
323 GNUNET_CONFIGURATION_get_value_filename (cfg, "REGEXPROFILER",
324 "POLICY_FILE", &policy_filename))
326 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
328 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
329 "regexprofiler", "policy_file");
330 global_ret = GNUNET_SYSERR;
331 GNUNET_SCHEDULER_shutdown ();
336 GNUNET_CONFIGURATION_get_value_string (cfg, "REGEXPROFILER",
337 "REGEX_PREFIX", ®ex_prefix))
339 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
341 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
342 "regexprofiler", "regex_prefix");
343 global_ret = GNUNET_SYSERR;
344 GNUNET_SCHEDULER_shutdown ();
349 GNUNET_CONFIGURATION_get_value_time (cfg, "REGEXPROFILER",
350 "REANNOUNCE_FREQ", &reannounce_freq))
352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
353 "reannounce_freq not given. Using 10 minutes.\n");
355 GNUNET_TIME_relative_multiply(GNUNET_TIME_relative_get_minute_(), 10);
359 stats_handle = GNUNET_STATISTICS_create ("regexprofiler", cfg);
361 dht_handle = GNUNET_DHT_connect (cfg, 1);
363 if (NULL == dht_handle)
365 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
366 "Could not acquire dht handle. Exiting.\n");
367 global_ret = GNUNET_SYSERR;
368 GNUNET_SCHEDULER_shutdown ();
372 /* Read regexes from policy files */
373 if (0 == load_regexes (policy_filename, ®ex))
375 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
376 "Policy file %s contains no policies. Exiting.\n",
378 global_ret = GNUNET_SYSERR;
379 GNUNET_SCHEDULER_shutdown ();
383 /* Announcing regexes from policy_filename */
384 GNUNET_asprintf (&rx_with_pfx, "%s(%s)", regex_prefix, regex);
387 keygen = GNUNET_CRYPTO_rsa_key_create_start (keyfile,
390 GNUNET_free (keyfile);
392 /* Scheduled the task to clean up when shutdown is called */
393 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
399 * The main function of the regexprofiler service.
401 * @param argc number of arguments from the command line
402 * @param argv command line arguments
403 * @return 0 ok, 1 on error
406 main (int argc, char *const *argv)
408 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
409 GNUNET_GETOPT_OPTION_END
412 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
416 GNUNET_PROGRAM_run (argc, argv, "regexprofiler",
418 ("Daemon to announce regular expressions for the peer using mesh."),
419 options, &run, NULL)) ? global_ret : 1;
427 * MINIMIZE heap size (way below 128k) since this process doesn't need much.
429 void __attribute__ ((constructor)) GNUNET_ARM_memory_init ()
431 mallopt (M_TRIM_THRESHOLD, 4 * 1024);
432 mallopt (M_TOP_PAD, 1 * 1024);
438 /* end of gnunet-daemon-regexprofiler.c */