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Diffstat (limited to 'src/zonemaster/gnunet-service-zonemaster-monitor.c')
-rw-r--r-- | src/zonemaster/gnunet-service-zonemaster-monitor.c | 460 |
1 files changed, 0 insertions, 460 deletions
diff --git a/src/zonemaster/gnunet-service-zonemaster-monitor.c b/src/zonemaster/gnunet-service-zonemaster-monitor.c deleted file mode 100644 index 748a0f342..000000000 --- a/src/zonemaster/gnunet-service-zonemaster-monitor.c +++ /dev/null | |||
@@ -1,460 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2012, 2013, 2014, 2017, 2018 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
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, | ||
8 | or (at your option) any later version. | ||
9 | |||
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 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file zonemaster/gnunet-service-zonemaster-monitor.c | ||
23 | * @brief monitor namestore changes and publish them immediately to GNUnet name system | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | #include "gnunet_dht_service.h" | ||
29 | #include "gnunet_namestore_service.h" | ||
30 | #include "gnunet_statistics_service.h" | ||
31 | |||
32 | #define LOG_STRERROR_FILE(kind, syscall, \ | ||
33 | filename) GNUNET_log_from_strerror_file (kind, "util", \ | ||
34 | syscall, \ | ||
35 | filename) | ||
36 | |||
37 | |||
38 | /** | ||
39 | * How often should we (re)publish each record before | ||
40 | * it expires? | ||
41 | */ | ||
42 | #define PUBLISH_OPS_PER_EXPIRATION 4 | ||
43 | |||
44 | /** | ||
45 | * How many pending DHT operations do we allow at most? | ||
46 | */ | ||
47 | #define DHT_QUEUE_LIMIT 2000 | ||
48 | |||
49 | /** | ||
50 | * How many events may the namestore give us before it has to wait | ||
51 | * for us to keep up? | ||
52 | */ | ||
53 | #define NAMESTORE_QUEUE_LIMIT 5 | ||
54 | |||
55 | /** | ||
56 | * What replication level do we use for DHT PUT operations? | ||
57 | */ | ||
58 | #define DHT_GNS_REPLICATION_LEVEL 5 | ||
59 | |||
60 | /** | ||
61 | * Handle for DHT PUT activity triggered from the namestore monitor. | ||
62 | */ | ||
63 | struct DhtPutActivity | ||
64 | { | ||
65 | /** | ||
66 | * Kept in a DLL. | ||
67 | */ | ||
68 | struct DhtPutActivity *next; | ||
69 | |||
70 | /** | ||
71 | * Kept in a DLL. | ||
72 | */ | ||
73 | struct DhtPutActivity *prev; | ||
74 | |||
75 | /** | ||
76 | * Handle for the DHT PUT operation. | ||
77 | */ | ||
78 | struct GNUNET_DHT_PutHandle *ph; | ||
79 | |||
80 | /** | ||
81 | * When was this PUT initiated? | ||
82 | */ | ||
83 | struct GNUNET_TIME_Absolute start_date; | ||
84 | }; | ||
85 | |||
86 | |||
87 | /** | ||
88 | * Handle to the statistics service | ||
89 | */ | ||
90 | static struct GNUNET_STATISTICS_Handle *statistics; | ||
91 | |||
92 | /** | ||
93 | * Our handle to the DHT | ||
94 | */ | ||
95 | static struct GNUNET_DHT_Handle *dht_handle; | ||
96 | |||
97 | /** | ||
98 | * Our handle to the namestore service | ||
99 | */ | ||
100 | static struct GNUNET_NAMESTORE_Handle *namestore_handle; | ||
101 | |||
102 | /** | ||
103 | * Handle to monitor namestore changes to instant propagation. | ||
104 | */ | ||
105 | static struct GNUNET_NAMESTORE_ZoneMonitor *zmon; | ||
106 | |||
107 | /** | ||
108 | * Head of monitor activities; kept in a DLL. | ||
109 | */ | ||
110 | static struct DhtPutActivity *ma_head; | ||
111 | |||
112 | /** | ||
113 | * Tail of monitor activities; kept in a DLL. | ||
114 | */ | ||
115 | static struct DhtPutActivity *ma_tail; | ||
116 | |||
117 | /** | ||
118 | * Number of entries in the DHT queue #ma_head. | ||
119 | */ | ||
120 | static unsigned int ma_queue_length; | ||
121 | |||
122 | /** | ||
123 | * Optimize block insertion by caching map of private keys to | ||
124 | * public keys in memory? | ||
125 | */ | ||
126 | static int cache_keys; | ||
127 | |||
128 | |||
129 | /** | ||
130 | * Task run during shutdown. | ||
131 | * | ||
132 | * @param cls unused | ||
133 | * @param tc unused | ||
134 | */ | ||
135 | static void | ||
136 | shutdown_task (void *cls) | ||
137 | { | ||
138 | struct DhtPutActivity *ma; | ||
139 | |||
140 | (void) cls; | ||
141 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
142 | "Shutting down!\n"); | ||
143 | while (NULL != (ma = ma_head)) | ||
144 | { | ||
145 | GNUNET_DHT_put_cancel (ma->ph); | ||
146 | ma_queue_length--; | ||
147 | GNUNET_CONTAINER_DLL_remove (ma_head, | ||
148 | ma_tail, | ||
149 | ma); | ||
150 | GNUNET_free (ma); | ||
151 | } | ||
152 | if (NULL != statistics) | ||
153 | { | ||
154 | GNUNET_STATISTICS_destroy (statistics, | ||
155 | GNUNET_NO); | ||
156 | statistics = NULL; | ||
157 | } | ||
158 | if (NULL != zmon) | ||
159 | { | ||
160 | GNUNET_NAMESTORE_zone_monitor_stop (zmon); | ||
161 | zmon = NULL; | ||
162 | } | ||
163 | if (NULL != namestore_handle) | ||
164 | { | ||
165 | GNUNET_NAMESTORE_disconnect (namestore_handle); | ||
166 | namestore_handle = NULL; | ||
167 | } | ||
168 | if (NULL != dht_handle) | ||
169 | { | ||
170 | GNUNET_DHT_disconnect (dht_handle); | ||
171 | dht_handle = NULL; | ||
172 | } | ||
173 | } | ||
174 | |||
175 | |||
176 | /** | ||
177 | * Continuation called from DHT once the PUT operation triggered | ||
178 | * by a monitor is done. | ||
179 | * | ||
180 | * @param cls a `struct DhtPutActivity` | ||
181 | */ | ||
182 | static void | ||
183 | dht_put_monitor_continuation (void *cls) | ||
184 | { | ||
185 | struct DhtPutActivity *ma = cls; | ||
186 | |||
187 | GNUNET_NAMESTORE_zone_monitor_next (zmon, | ||
188 | 1); | ||
189 | ma_queue_length--; | ||
190 | GNUNET_CONTAINER_DLL_remove (ma_head, | ||
191 | ma_tail, | ||
192 | ma); | ||
193 | GNUNET_free (ma); | ||
194 | } | ||
195 | |||
196 | |||
197 | /** | ||
198 | * Store GNS records in the DHT. | ||
199 | * | ||
200 | * @param key key of the zone | ||
201 | * @param label label to store under | ||
202 | * @param rd_public public record data | ||
203 | * @param rd_public_count number of records in @a rd_public | ||
204 | * @param ma handle for the PUT operation | ||
205 | * @return DHT PUT handle, NULL on error | ||
206 | */ | ||
207 | static struct GNUNET_DHT_PutHandle * | ||
208 | perform_dht_put (const struct GNUNET_IDENTITY_PrivateKey *key, | ||
209 | const char *label, | ||
210 | const struct GNUNET_GNSRECORD_Data *rd_public, | ||
211 | unsigned int rd_public_count, | ||
212 | struct GNUNET_TIME_Absolute expire, | ||
213 | struct DhtPutActivity *ma) | ||
214 | { | ||
215 | struct GNUNET_GNSRECORD_Block *block; | ||
216 | struct GNUNET_HashCode query; | ||
217 | size_t block_size; | ||
218 | struct GNUNET_DHT_PutHandle *ret; | ||
219 | |||
220 | if (cache_keys) | ||
221 | GNUNET_assert (GNUNET_OK == GNUNET_GNSRECORD_block_create2 (key, | ||
222 | expire, | ||
223 | label, | ||
224 | rd_public, | ||
225 | rd_public_count, | ||
226 | &block)); | ||
227 | else | ||
228 | GNUNET_assert (GNUNET_OK == GNUNET_GNSRECORD_block_create (key, | ||
229 | expire, | ||
230 | label, | ||
231 | rd_public, | ||
232 | rd_public_count, | ||
233 | &block)); | ||
234 | if (NULL == block) | ||
235 | { | ||
236 | GNUNET_break (0); | ||
237 | return NULL; /* whoops */ | ||
238 | } | ||
239 | block_size = GNUNET_GNSRECORD_block_get_size (block); | ||
240 | GNUNET_GNSRECORD_query_from_private_key (key, | ||
241 | label, | ||
242 | &query); | ||
243 | GNUNET_STATISTICS_update (statistics, | ||
244 | "DHT put operations initiated", | ||
245 | 1, | ||
246 | GNUNET_NO); | ||
247 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
248 | "Storing %u record(s) for label `%s' in DHT with expiration `%s' under key %s\n", | ||
249 | rd_public_count, | ||
250 | label, | ||
251 | GNUNET_STRINGS_absolute_time_to_string (expire), | ||
252 | GNUNET_h2s (&query)); | ||
253 | ret = GNUNET_DHT_put (dht_handle, | ||
254 | &query, | ||
255 | DHT_GNS_REPLICATION_LEVEL, | ||
256 | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, | ||
257 | GNUNET_BLOCK_TYPE_GNS_NAMERECORD, | ||
258 | block_size, | ||
259 | block, | ||
260 | expire, | ||
261 | &dht_put_monitor_continuation, | ||
262 | ma); | ||
263 | GNUNET_free (block); | ||
264 | return ret; | ||
265 | } | ||
266 | |||
267 | /** | ||
268 | * Process a record that was stored in the namestore | ||
269 | * (invoked by the monitor). | ||
270 | * | ||
271 | * @param cls closure, NULL | ||
272 | * @param zone private key of the zone; NULL on disconnect | ||
273 | * @param label label of the records; NULL on disconnect | ||
274 | * @param rd_count number of entries in @a rd array, 0 if label was deleted | ||
275 | * @param rd array of records with data to store | ||
276 | */ | ||
277 | static void | ||
278 | handle_monitor_event (void *cls, | ||
279 | const struct GNUNET_IDENTITY_PrivateKey *zone, | ||
280 | const char *label, | ||
281 | unsigned int rd_count, | ||
282 | const struct GNUNET_GNSRECORD_Data *rd) | ||
283 | { | ||
284 | struct GNUNET_GNSRECORD_Data rd_public[rd_count]; | ||
285 | unsigned int rd_public_count; | ||
286 | struct DhtPutActivity *ma; | ||
287 | struct GNUNET_TIME_Absolute expire; | ||
288 | char *emsg; | ||
289 | |||
290 | (void) cls; | ||
291 | GNUNET_STATISTICS_update (statistics, | ||
292 | "Namestore monitor events received", | ||
293 | 1, | ||
294 | GNUNET_NO); | ||
295 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
296 | "Received %u records for label `%s' via namestore monitor\n", | ||
297 | rd_count, | ||
298 | label); | ||
299 | /* filter out records that are not public, and convert to | ||
300 | absolute expiration time. */ | ||
301 | if (GNUNET_OK != GNUNET_GNSRECORD_convert_records_for_export (label, | ||
302 | rd, | ||
303 | rd_count, | ||
304 | rd_public, | ||
305 | &rd_public_count, | ||
306 | &expire, | ||
307 | &emsg)) | ||
308 | { | ||
309 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
310 | "Zonemaster-monitor failed: %s\n", emsg); | ||
311 | GNUNET_free (emsg); | ||
312 | GNUNET_NAMESTORE_zone_monitor_next (zmon, | ||
313 | 1); | ||
314 | return; /* nothing to do */ | ||
315 | } | ||
316 | if (0 == rd_public_count) | ||
317 | { | ||
318 | GNUNET_NAMESTORE_zone_monitor_next (zmon, | ||
319 | 1); | ||
320 | return; /* nothing to do */ | ||
321 | } | ||
322 | ma = GNUNET_new (struct DhtPutActivity); | ||
323 | ma->start_date = GNUNET_TIME_absolute_get (); | ||
324 | ma->ph = perform_dht_put (zone, | ||
325 | label, | ||
326 | rd_public, | ||
327 | rd_public_count, | ||
328 | expire, | ||
329 | ma); | ||
330 | if (NULL == ma->ph) | ||
331 | { | ||
332 | /* PUT failed, do not remember operation */ | ||
333 | GNUNET_free (ma); | ||
334 | GNUNET_NAMESTORE_zone_monitor_next (zmon, | ||
335 | 1); | ||
336 | return; | ||
337 | } | ||
338 | GNUNET_CONTAINER_DLL_insert_tail (ma_head, | ||
339 | ma_tail, | ||
340 | ma); | ||
341 | ma_queue_length++; | ||
342 | if (ma_queue_length > DHT_QUEUE_LIMIT) | ||
343 | { | ||
344 | ma = ma_head; | ||
345 | GNUNET_CONTAINER_DLL_remove (ma_head, | ||
346 | ma_tail, | ||
347 | ma); | ||
348 | GNUNET_DHT_put_cancel (ma->ph); | ||
349 | ma_queue_length--; | ||
350 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
351 | "DHT PUT unconfirmed after %s, aborting PUT\n", | ||
352 | GNUNET_STRINGS_relative_time_to_string ( | ||
353 | GNUNET_TIME_absolute_get_duration (ma->start_date), | ||
354 | GNUNET_YES)); | ||
355 | GNUNET_free (ma); | ||
356 | } | ||
357 | } | ||
358 | |||
359 | |||
360 | /** | ||
361 | * The zone monitor encountered an IPC error trying to to get in | ||
362 | * sync. Restart from the beginning. | ||
363 | * | ||
364 | * @param cls NULL | ||
365 | */ | ||
366 | static void | ||
367 | handle_monitor_error (void *cls) | ||
368 | { | ||
369 | (void) cls; | ||
370 | GNUNET_STATISTICS_update (statistics, | ||
371 | "Namestore monitor errors encountered", | ||
372 | 1, | ||
373 | GNUNET_NO); | ||
374 | } | ||
375 | |||
376 | |||
377 | /** | ||
378 | * Perform zonemaster duties: watch namestore, publish records. | ||
379 | * | ||
380 | * @param cls closure | ||
381 | * @param server the initialized server | ||
382 | * @param c configuration to use | ||
383 | */ | ||
384 | static void | ||
385 | run (void *cls, | ||
386 | const struct GNUNET_CONFIGURATION_Handle *c, | ||
387 | struct GNUNET_SERVICE_Handle *service) | ||
388 | { | ||
389 | unsigned long long max_parallel_bg_queries = 128; | ||
390 | |||
391 | (void) cls; | ||
392 | (void) service; | ||
393 | namestore_handle = GNUNET_NAMESTORE_connect (c); | ||
394 | if (NULL == namestore_handle) | ||
395 | { | ||
396 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
397 | _ ("Failed to connect to the namestore!\n")); | ||
398 | GNUNET_SCHEDULER_shutdown (); | ||
399 | return; | ||
400 | } | ||
401 | cache_keys = GNUNET_CONFIGURATION_get_value_yesno (c, | ||
402 | "namestore", | ||
403 | "CACHE_KEYS"); | ||
404 | if (GNUNET_OK == | ||
405 | GNUNET_CONFIGURATION_get_value_number (c, | ||
406 | "zonemaster", | ||
407 | "MAX_PARALLEL_BACKGROUND_QUERIES", | ||
408 | &max_parallel_bg_queries)) | ||
409 | { | ||
410 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
411 | "Number of allowed parallel background queries: %llu\n", | ||
412 | max_parallel_bg_queries); | ||
413 | } | ||
414 | if (0 == max_parallel_bg_queries) | ||
415 | max_parallel_bg_queries = 1; | ||
416 | dht_handle = GNUNET_DHT_connect (c, | ||
417 | (unsigned int) max_parallel_bg_queries); | ||
418 | if (NULL == dht_handle) | ||
419 | { | ||
420 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
421 | _ ("Could not connect to DHT!\n")); | ||
422 | GNUNET_SCHEDULER_add_now (&shutdown_task, | ||
423 | NULL); | ||
424 | return; | ||
425 | } | ||
426 | |||
427 | /* Schedule periodic put for our records. */ | ||
428 | statistics = GNUNET_STATISTICS_create ("zonemaster-mon", | ||
429 | c); | ||
430 | zmon = GNUNET_NAMESTORE_zone_monitor_start (c, | ||
431 | NULL, | ||
432 | GNUNET_NO, | ||
433 | &handle_monitor_error, | ||
434 | NULL, | ||
435 | &handle_monitor_event, | ||
436 | NULL, | ||
437 | NULL /* sync_cb */, | ||
438 | NULL); | ||
439 | GNUNET_NAMESTORE_zone_monitor_next (zmon, | ||
440 | NAMESTORE_QUEUE_LIMIT - 1); | ||
441 | GNUNET_break (NULL != zmon); | ||
442 | GNUNET_SCHEDULER_add_shutdown (&shutdown_task, | ||
443 | NULL); | ||
444 | } | ||
445 | |||
446 | |||
447 | /** | ||
448 | * Define "main" method using service macro. | ||
449 | */ | ||
450 | GNUNET_SERVICE_MAIN | ||
451 | ("zonemaster-monitor", | ||
452 | GNUNET_SERVICE_OPTION_NONE, | ||
453 | &run, | ||
454 | NULL, | ||
455 | NULL, | ||
456 | NULL, | ||
457 | GNUNET_MQ_handler_end ()); | ||
458 | |||
459 | |||
460 | /* end of gnunet-service-zonemaster-monitor.c */ | ||