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3 Copyright (C) 2008--2013 GNUnet e.V.
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6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
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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 Affero General Public License for more details.
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
23 * @file testbed/gnunet-daemon-testbed-blacklist.c
24 * @brief daemon to restrict incoming connections from other peers at the
25 * transport layer of a peer
26 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
30 #include "gnunet_util_lib.h"
31 #include "gnunet_transport_service.h"
32 #include "gnunet_transport_manipulation_service.h"
33 #include "gnunet_ats_service.h"
34 #include "gnunet_testing_lib.h"
40 #define LOG(type, ...) \
41 GNUNET_log (type, __VA_ARGS__)
44 * Debug logging shorthand
47 LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
50 * Log an error message at log-level 'level' that indicates
51 * a failure of the command 'cmd' on file 'filename'
52 * with the message given by strerror(errno).
54 #define LOG_SQLITE(db, msg, level, cmd) \
56 GNUNET_log_from (level, "sqlite", _ ( \
57 "`%s' failed at %s:%d with error: %s\n"), \
58 cmd, __FILE__, __LINE__, sqlite3_errmsg (db)); \
60 GNUNET_asprintf (msg, _ ("`%s' failed at %s:%u with error: %s"), cmd, \
61 __FILE__, __LINE__, sqlite3_errmsg (db)); \
66 * The map to store the peer identities to allow/deny
68 static struct GNUNET_CONTAINER_MultiPeerMap *map;
71 * The database connection
73 static struct sqlite3 *db;
76 * The blacklist handle we obtain from transport when we register ourselves for
79 static struct GNUNET_TRANSPORT_Blacklist *bh;
84 struct GNUNET_DISK_FileHandle *hostkeys_fd;
89 static struct GNUNET_DISK_MapHandle *hostkeys_map;
94 static void *hostkeys_data;
97 * Handle to the transport service. This is used for setting link metrics
99 static struct GNUNET_TRANSPORT_ManipulationHandle *transport;
102 * The number of hostkeys in the hostkeys array
104 static unsigned int num_hostkeys;
109 * Iterator over hash map entries.
112 * @param key current key code
113 * @param value value in the hash map
114 * @return #GNUNET_YES if we should continue to
119 iterator (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
121 GNUNET_assert (GNUNET_YES == GNUNET_CONTAINER_multipeermap_remove (map, key,
128 * Cleaup and destroy the map
135 GNUNET_assert (GNUNET_SYSERR != GNUNET_CONTAINER_multipeermap_iterate (map,
139 GNUNET_CONTAINER_multipeermap_destroy (map);
146 * Function that decides if a connection is acceptable or not.
149 * @param pid peer to approve or disapproave
150 * @return GNUNET_OK if the connection is allowed, GNUNET_SYSERR if not
153 check_access (void *cls, const struct GNUNET_PeerIdentity *pid)
157 GNUNET_assert (NULL != map);
158 contains = GNUNET_CONTAINER_multipeermap_contains (map, pid);
159 if (GNUNET_YES == contains)
161 DEBUG ("Permitting `%s'\n", GNUNET_i2s (pid));
164 DEBUG ("Not permitting `%s'\n", GNUNET_i2s (pid));
165 return GNUNET_SYSERR;
170 get_identity (unsigned int offset,
171 struct GNUNET_PeerIdentity *id)
173 struct GNUNET_CRYPTO_EddsaPrivateKey private_key;
175 if (offset >= num_hostkeys)
176 return GNUNET_SYSERR;
177 GNUNET_memcpy (&private_key,
178 hostkeys_data + (offset * GNUNET_TESTING_HOSTKEYFILESIZE),
179 GNUNET_TESTING_HOSTKEYFILESIZE);
180 GNUNET_CRYPTO_eddsa_key_get_public (&private_key,
194 struct WhiteListRow *next;
197 * The offset where to find the hostkey for the peer
202 * Latency to be assigned to the link
209 * Function to load keys
212 load_keys (const struct GNUNET_CONFIGURATION_Handle *c)
221 data_dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_DATADIR);
222 GNUNET_asprintf (&idfile, "%s/testing_hostkeys.ecc", data_dir);
223 GNUNET_free (data_dir);
226 GNUNET_DISK_file_size (idfile, &fsize, GNUNET_YES, GNUNET_YES))
228 GNUNET_free (idfile);
229 return GNUNET_SYSERR;
231 if (0 != (fsize % GNUNET_TESTING_HOSTKEYFILESIZE))
233 LOG (GNUNET_ERROR_TYPE_ERROR,
234 _ ("Incorrect hostkey file format: %s\n"), idfile);
235 GNUNET_free (idfile);
236 return GNUNET_SYSERR;
238 hostkeys_fd = GNUNET_DISK_file_open (idfile, GNUNET_DISK_OPEN_READ,
239 GNUNET_DISK_PERM_NONE);
240 if (NULL == hostkeys_fd)
242 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", idfile);
243 GNUNET_free (idfile);
244 return GNUNET_SYSERR;
246 GNUNET_free (idfile);
248 hostkeys_data = GNUNET_DISK_file_map (hostkeys_fd,
250 GNUNET_DISK_MAP_TYPE_READ,
252 if (NULL == hostkeys_data)
254 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "mmap");
255 return GNUNET_SYSERR;
257 num_hostkeys = fsize / GNUNET_TESTING_HOSTKEYFILESIZE;
263 * Function to unload keys
268 if (NULL != hostkeys_map)
270 GNUNET_assert (NULL != hostkeys_data);
271 GNUNET_DISK_file_unmap (hostkeys_map);
273 hostkeys_data = NULL;
275 if (NULL != hostkeys_fd)
277 GNUNET_DISK_file_close (hostkeys_fd);
284 * Shutdown task to cleanup our resources and exit.
289 do_shutdown (void *cls)
291 if (NULL != transport)
293 GNUNET_TRANSPORT_manipulation_disconnect (transport);
299 GNUNET_TRANSPORT_blacklist_cancel (bh);
304 * Function to read whitelist rows from the database
306 * @param db the database connection
307 * @param pid the identity of this peer
308 * @param wl_rows where to store the retrieved whitelist rows
309 * @return GNUNET_SYSERR upon error OR the number of rows retrieved
312 db_read_whitelist (struct sqlite3 *db, int pid, struct WhiteListRow **wl_rows)
314 static const char *query_wl =
315 "SELECT oid, latency FROM whitelist WHERE (id == ?);";
316 struct sqlite3_stmt *stmt_wl;
317 struct WhiteListRow *lr;
321 if (SQLITE_OK != (ret = sqlite3_prepare_v2 (db, query_wl, -1, &stmt_wl,
324 LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_prepare_v2");
325 return GNUNET_SYSERR;
327 if (SQLITE_OK != (ret = sqlite3_bind_int (stmt_wl, 1, pid)))
329 LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_bind_int");
330 sqlite3_finalize (stmt_wl);
331 return GNUNET_SYSERR;
336 ret = sqlite3_step (stmt_wl);
337 if (SQLITE_ROW != ret)
340 lr = GNUNET_new (struct WhiteListRow);
341 lr->id = sqlite3_column_int (stmt_wl, 0);
342 lr->latency = sqlite3_column_int (stmt_wl, 1);
347 sqlite3_finalize (stmt_wl);
353 * Main function that will be run.
356 * @param args remaining command-line arguments
357 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
358 * @param c configuration
361 run (void *cls, char *const *args, const char *cfgfile,
362 const struct GNUNET_CONFIGURATION_Handle *c)
365 struct WhiteListRow *wl_head;
366 struct WhiteListRow *wl_entry;
367 struct GNUNET_PeerIdentity identity;
368 struct GNUNET_ATS_Properties prop;
369 struct GNUNET_TIME_Relative delay;
370 unsigned long long pid;
375 GNUNET_CONFIGURATION_get_value_number (c, "TESTBED",
381 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c,
389 if (SQLITE_OK != (ret = sqlite3_open_v2 (dbfile, &db, SQLITE_OPEN_READONLY,
394 LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite_open_v2");
395 GNUNET_break (SQLITE_OK == sqlite3_close (db));
398 LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot open sqlite file %s\n", dbfile);
399 GNUNET_free (dbfile);
402 DEBUG ("Opened database %s\n", dbfile);
403 GNUNET_free (dbfile);
406 if (GNUNET_OK != load_keys (c))
409 transport = GNUNET_TRANSPORT_manipulation_connect (c);
410 if (NULL == transport)
415 /* read and process whitelist */
418 nrows = db_read_whitelist (db, pid, &wl_head);
419 if ((GNUNET_SYSERR == nrows) || (0 == nrows))
421 GNUNET_TRANSPORT_manipulation_disconnect (transport);
424 map = GNUNET_CONTAINER_multipeermap_create (nrows, GNUNET_NO);
425 while (NULL != (wl_entry = wl_head))
427 wl_head = wl_entry->next;
428 delay.rel_value_us = wl_entry->latency;
429 memset (&prop, 0, sizeof(prop));
430 GNUNET_assert (GNUNET_OK == get_identity (wl_entry->id, &identity));
431 GNUNET_break (GNUNET_OK ==
432 GNUNET_CONTAINER_multipeermap_put (map, &identity, &identity,
433 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
434 DEBUG ("Setting %u ms latency to peer `%s'\n",
436 GNUNET_i2s (&identity));
437 GNUNET_TRANSPORT_manipulation_set (transport,
442 GNUNET_free (wl_entry);
444 bh = GNUNET_TRANSPORT_blacklist (c, &check_access, NULL);
445 GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
448 GNUNET_break (SQLITE_OK == sqlite3_close (db));
455 * @param argc number of arguments from the command line
456 * @param argv command line arguments
457 * @return 0 ok, 1 on error
460 main (int argc, char *const *argv)
462 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
463 GNUNET_GETOPT_OPTION_END
467 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
469 #ifdef SQLITE_CONFIG_MMAP_SIZE
470 (void) sqlite3_config (SQLITE_CONFIG_MMAP_SIZE, 512000, 256000000);
474 GNUNET_PROGRAM_run (argc, argv, "testbed-underlay",
477 "Daemon to restrict underlay network in testbed deployments"),
478 options, &run, NULL)) ? 0 : 1;
479 GNUNET_free ((void *) argv);