diff options
Diffstat (limited to 'src/peerinfo/gnunet-service-peerinfo.c')
-rw-r--r-- | src/peerinfo/gnunet-service-peerinfo.c | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/src/peerinfo/gnunet-service-peerinfo.c b/src/peerinfo/gnunet-service-peerinfo.c new file mode 100644 index 000000000..b81c7b6ee --- /dev/null +++ b/src/peerinfo/gnunet-service-peerinfo.c | |||
@@ -0,0 +1,708 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2001, 2002, 2004, 2005, 2007, 2009 Christian Grothoff (and other contributing authors) | ||
4 | |||
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 2, or (at your | ||
8 | 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 | General Public License for more details. | ||
14 | |||
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. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file peerinfo/gnunet-service-peerinfo.c | ||
23 | * @brief maintains list of known peers | ||
24 | * | ||
25 | * Code to maintain the list of currently known hosts (in memory | ||
26 | * structure of data/hosts/ and data/credit/). | ||
27 | * | ||
28 | * @author Christian Grothoff | ||
29 | */ | ||
30 | |||
31 | #include "platform.h" | ||
32 | #include "gnunet_crypto_lib.h" | ||
33 | #include "gnunet_disk_lib.h" | ||
34 | #include "gnunet_hello_lib.h" | ||
35 | #include "gnunet_protocols.h" | ||
36 | #include "gnunet_service_lib.h" | ||
37 | #include "peerinfo.h" | ||
38 | |||
39 | /** | ||
40 | * How often do we scan the HOST_DIR for new entries? | ||
41 | */ | ||
42 | #define DATA_HOST_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15) | ||
43 | |||
44 | /** | ||
45 | * How often do we flush trust values to disk? | ||
46 | */ | ||
47 | #define TRUST_FLUSH_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5) | ||
48 | |||
49 | /** | ||
50 | * How often do we discard old entries in data/hosts/? | ||
51 | */ | ||
52 | #define DATA_HOST_CLEAN_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 60) | ||
53 | |||
54 | /** | ||
55 | * In-memory cache of known hosts. | ||
56 | */ | ||
57 | struct HostEntry | ||
58 | { | ||
59 | |||
60 | /** | ||
61 | * This is a linked list. | ||
62 | */ | ||
63 | struct HostEntry *next; | ||
64 | |||
65 | /** | ||
66 | * Identity of the peer. | ||
67 | */ | ||
68 | struct GNUNET_PeerIdentity identity; | ||
69 | |||
70 | /** | ||
71 | * Hello for the peer (can be NULL) | ||
72 | */ | ||
73 | struct GNUNET_HELLO_Message *hello; | ||
74 | |||
75 | /** | ||
76 | * Trust rating for this peer | ||
77 | */ | ||
78 | uint32_t trust; | ||
79 | |||
80 | /** | ||
81 | * Trust rating for this peer on disk. | ||
82 | */ | ||
83 | uint32_t disk_trust; | ||
84 | |||
85 | }; | ||
86 | |||
87 | /** | ||
88 | * The in-memory list of known hosts. | ||
89 | */ | ||
90 | static struct HostEntry *hosts; | ||
91 | |||
92 | /** | ||
93 | * Directory where the hellos are stored in (data/hosts) | ||
94 | */ | ||
95 | static char *networkIdDirectory; | ||
96 | |||
97 | /** | ||
98 | * Where do we store trust information? | ||
99 | */ | ||
100 | static char *trustDirectory; | ||
101 | |||
102 | |||
103 | /** | ||
104 | * Address iterator that causes expired entries to be discarded. | ||
105 | * | ||
106 | * @param cls pointer to the current time | ||
107 | * @return GNUNET_NO if expiration smaller than the current time | ||
108 | */ | ||
109 | static int | ||
110 | discard_expired (void *cls, | ||
111 | const char *tname, | ||
112 | struct GNUNET_TIME_Absolute expiration, | ||
113 | const void *addr, size_t addrlen) | ||
114 | { | ||
115 | const struct GNUNET_TIME_Absolute *now = cls; | ||
116 | if (now->value > expiration.value) | ||
117 | return GNUNET_NO; | ||
118 | return GNUNET_OK; | ||
119 | } | ||
120 | |||
121 | |||
122 | /** | ||
123 | * Get the filename under which we would store the GNUNET_HELLO_Message | ||
124 | * for the given host and protocol. | ||
125 | * @return filename of the form DIRECTORY/HOSTID | ||
126 | */ | ||
127 | static char * | ||
128 | get_host_filename (const struct GNUNET_PeerIdentity *id) | ||
129 | { | ||
130 | struct GNUNET_CRYPTO_HashAsciiEncoded fil; | ||
131 | char *fn; | ||
132 | |||
133 | GNUNET_CRYPTO_hash_to_enc (&id->hashPubKey, &fil); | ||
134 | GNUNET_asprintf (&fn, | ||
135 | "%s%s%s", networkIdDirectory, DIR_SEPARATOR_STR, &fil); | ||
136 | return fn; | ||
137 | } | ||
138 | |||
139 | |||
140 | /** | ||
141 | * Get the filename under which we would store the GNUNET_HELLO_Message | ||
142 | * for the given host and protocol. | ||
143 | * @return filename of the form DIRECTORY/HOSTID | ||
144 | */ | ||
145 | static char * | ||
146 | get_trust_filename (const struct GNUNET_PeerIdentity *id) | ||
147 | { | ||
148 | struct GNUNET_CRYPTO_HashAsciiEncoded fil; | ||
149 | char *fn; | ||
150 | |||
151 | GNUNET_CRYPTO_hash_to_enc (&id->hashPubKey, &fil); | ||
152 | GNUNET_asprintf (&fn, "%s%s%s", trustDirectory, DIR_SEPARATOR_STR, &fil); | ||
153 | return fn; | ||
154 | } | ||
155 | |||
156 | /** | ||
157 | * Find the host entry for the given peer. Call | ||
158 | * only when synchronized! | ||
159 | * @return NULL if not found | ||
160 | */ | ||
161 | static struct HostEntry * | ||
162 | lookup_host_entry (const struct GNUNET_PeerIdentity *id) | ||
163 | { | ||
164 | struct HostEntry *pos; | ||
165 | |||
166 | pos = hosts; | ||
167 | while ((pos != NULL) && | ||
168 | (0 != | ||
169 | memcmp (id, &pos->identity, sizeof (struct GNUNET_PeerIdentity)))) | ||
170 | pos = pos->next; | ||
171 | return pos; | ||
172 | } | ||
173 | |||
174 | |||
175 | /** | ||
176 | * Add a host to the list. | ||
177 | * | ||
178 | * @param identity the identity of the host | ||
179 | * @param protocol the protocol for the host | ||
180 | */ | ||
181 | static void | ||
182 | add_host_to_known_hosts (const struct GNUNET_PeerIdentity *identity) | ||
183 | { | ||
184 | struct HostEntry *entry; | ||
185 | char *fn; | ||
186 | uint32_t trust; | ||
187 | char buffer[GNUNET_SERVER_MAX_MESSAGE_SIZE]; | ||
188 | const struct GNUNET_HELLO_Message *hello; | ||
189 | struct GNUNET_HELLO_Message *hello_clean; | ||
190 | int size; | ||
191 | struct GNUNET_TIME_Absolute now; | ||
192 | |||
193 | entry = lookup_host_entry (identity); | ||
194 | if (entry != NULL) | ||
195 | return; | ||
196 | entry = GNUNET_malloc (sizeof (struct HostEntry)); | ||
197 | entry->identity = *identity; | ||
198 | fn = get_trust_filename (identity); | ||
199 | if ((GNUNET_DISK_file_test (fn) == GNUNET_YES) && | ||
200 | (sizeof (trust) == GNUNET_DISK_file_read (fn, sizeof (trust), &trust))) | ||
201 | entry->disk_trust = entry->trust = ntohl (trust); | ||
202 | GNUNET_free (fn); | ||
203 | |||
204 | fn = get_host_filename (identity); | ||
205 | if (GNUNET_DISK_file_test (fn) == GNUNET_YES) | ||
206 | { | ||
207 | size = GNUNET_DISK_file_read (fn, sizeof (buffer), buffer); | ||
208 | hello = (const struct GNUNET_HELLO_Message *) buffer; | ||
209 | now = GNUNET_TIME_absolute_get (); | ||
210 | hello_clean = GNUNET_HELLO_iterate_addresses (hello, | ||
211 | GNUNET_YES, | ||
212 | &discard_expired, &now); | ||
213 | entry->hello = hello_clean; | ||
214 | } | ||
215 | GNUNET_free (fn); | ||
216 | entry->next = hosts; | ||
217 | hosts = entry; | ||
218 | } | ||
219 | |||
220 | |||
221 | /** | ||
222 | * Increase the host credit by a value. | ||
223 | * | ||
224 | * @param hostId is the identity of the host | ||
225 | * @param value is the int value by which the | ||
226 | * host credit is to be increased or decreased | ||
227 | * @returns the actual change in trust (positive or negative) | ||
228 | */ | ||
229 | static int | ||
230 | change_host_trust (const struct GNUNET_PeerIdentity *hostId, int value) | ||
231 | { | ||
232 | struct HostEntry *host; | ||
233 | |||
234 | if (value == 0) | ||
235 | return 0; | ||
236 | host = lookup_host_entry (hostId); | ||
237 | if (host == NULL) | ||
238 | { | ||
239 | add_host_to_known_hosts (hostId); | ||
240 | host = lookup_host_entry (hostId); | ||
241 | } | ||
242 | GNUNET_assert (host != NULL); | ||
243 | if (value > 0) | ||
244 | { | ||
245 | if (host->trust + value < host->trust) | ||
246 | { | ||
247 | value = ((uint32_t) - 1) - host->trust; | ||
248 | host->trust = (uint32_t) - 1; /* maximized */ | ||
249 | } | ||
250 | else | ||
251 | host->trust += value; | ||
252 | } | ||
253 | else | ||
254 | { | ||
255 | if (host->trust < -value) | ||
256 | { | ||
257 | value = -host->trust; | ||
258 | host->trust = 0; | ||
259 | } | ||
260 | else | ||
261 | host->trust += value; | ||
262 | } | ||
263 | return value; | ||
264 | } | ||
265 | |||
266 | |||
267 | /** | ||
268 | * Remove a file that should not be there. LOG | ||
269 | * success or failure. | ||
270 | */ | ||
271 | static void | ||
272 | remove_garbage (const char *fullname) | ||
273 | { | ||
274 | if (0 == UNLINK (fullname)) | ||
275 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK, | ||
276 | _ | ||
277 | ("File `%s' in directory `%s' does not match naming convention. " | ||
278 | "Removed.\n"), fullname, networkIdDirectory); | ||
279 | else | ||
280 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR | | ||
281 | GNUNET_ERROR_TYPE_BULK, "unlink", fullname); | ||
282 | } | ||
283 | |||
284 | |||
285 | static int | ||
286 | hosts_directory_scan_callback (void *cls, const char *fullname) | ||
287 | { | ||
288 | unsigned int *matched = cls; | ||
289 | struct GNUNET_PeerIdentity identity; | ||
290 | const char *filename; | ||
291 | |||
292 | if (GNUNET_DISK_file_test (fullname) != GNUNET_YES) | ||
293 | return GNUNET_OK; /* ignore non-files */ | ||
294 | if (strlen (fullname) < sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) | ||
295 | { | ||
296 | remove_garbage (fullname); | ||
297 | return GNUNET_OK; | ||
298 | } | ||
299 | filename = | ||
300 | &fullname[strlen (fullname) - | ||
301 | sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) + 1]; | ||
302 | if (filename[-1] != DIR_SEPARATOR) | ||
303 | { | ||
304 | remove_garbage (fullname); | ||
305 | return GNUNET_OK; | ||
306 | } | ||
307 | if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string (filename, | ||
308 | &identity.hashPubKey)) | ||
309 | { | ||
310 | remove_garbage (fullname); | ||
311 | return GNUNET_OK; | ||
312 | } | ||
313 | (*matched)++; | ||
314 | add_host_to_known_hosts (&identity); | ||
315 | return GNUNET_OK; | ||
316 | } | ||
317 | |||
318 | |||
319 | /** | ||
320 | * Call this method periodically to scan data/hosts for new hosts. | ||
321 | */ | ||
322 | static void | ||
323 | cron_scan_directory_data_hosts (void *cls, | ||
324 | const struct GNUNET_SCHEDULER_TaskContext *tc) | ||
325 | { | ||
326 | static unsigned int retries; | ||
327 | unsigned int count; | ||
328 | |||
329 | count = 0; | ||
330 | GNUNET_DISK_directory_scan (networkIdDirectory, | ||
331 | &hosts_directory_scan_callback, &count); | ||
332 | if ((0 == count) && (0 == (++retries & 31))) | ||
333 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING | | ||
334 | GNUNET_ERROR_TYPE_BULK, | ||
335 | _("Still no peers found in `%s'!\n"), networkIdDirectory); | ||
336 | GNUNET_SCHEDULER_add_delayed (tc->sched, | ||
337 | GNUNET_NO, | ||
338 | GNUNET_SCHEDULER_PRIORITY_KEEP, | ||
339 | GNUNET_SCHEDULER_NO_PREREQUISITE_TASK, | ||
340 | DATA_HOST_FREQ, | ||
341 | &cron_scan_directory_data_hosts, NULL); | ||
342 | } | ||
343 | |||
344 | |||
345 | /** | ||
346 | * Bind a host address (hello) to a hostId. | ||
347 | * | ||
348 | * @param peer the peer for which this is a hello | ||
349 | * @param hello the verified (!) hello message | ||
350 | */ | ||
351 | static void | ||
352 | bind_address (const struct GNUNET_PeerIdentity *peer, | ||
353 | const struct GNUNET_HELLO_Message *hello) | ||
354 | { | ||
355 | char *fn; | ||
356 | struct HostEntry *host; | ||
357 | struct GNUNET_HELLO_Message *mrg; | ||
358 | |||
359 | add_host_to_known_hosts (peer); | ||
360 | host = lookup_host_entry (peer); | ||
361 | GNUNET_assert (host != NULL); | ||
362 | if (host->hello == NULL) | ||
363 | { | ||
364 | host->hello = GNUNET_malloc (GNUNET_HELLO_size (hello)); | ||
365 | memcpy (host->hello, hello, GNUNET_HELLO_size (hello)); | ||
366 | } | ||
367 | else | ||
368 | { | ||
369 | mrg = GNUNET_HELLO_merge (host->hello, hello); | ||
370 | GNUNET_free (host->hello); | ||
371 | host->hello = mrg; | ||
372 | } | ||
373 | fn = get_host_filename (peer); | ||
374 | GNUNET_DISK_file_write (fn, host->hello, GNUNET_HELLO_size (hello), "644"); | ||
375 | GNUNET_free (fn); | ||
376 | } | ||
377 | |||
378 | |||
379 | /** | ||
380 | * Do transmit info either for only the host matching the given | ||
381 | * argument or for all known hosts and change their trust values by | ||
382 | * the given delta. | ||
383 | * | ||
384 | * @param only NULL to hit all hosts | ||
385 | */ | ||
386 | static void | ||
387 | send_to_each_host (const struct GNUNET_PeerIdentity *only, | ||
388 | int trust_change, | ||
389 | struct GNUNET_SERVER_Client *client, | ||
390 | struct GNUNET_SERVER_Handle *server) | ||
391 | { | ||
392 | struct HostEntry *pos; | ||
393 | struct InfoMessage *im; | ||
394 | const struct GNUNET_MessageHeader *end; | ||
395 | uint16_t hs; | ||
396 | char buf[GNUNET_SERVER_MAX_MESSAGE_SIZE]; | ||
397 | struct GNUNET_SERVER_TransmitContext *tc; | ||
398 | |||
399 | tc = GNUNET_SERVER_transmit_context_create (client); | ||
400 | pos = hosts; | ||
401 | while (pos != NULL) | ||
402 | { | ||
403 | if ((only == NULL) || | ||
404 | (0 == | ||
405 | memcmp (only, &pos->identity, | ||
406 | sizeof (struct GNUNET_PeerIdentity)))) | ||
407 | { | ||
408 | change_host_trust (&pos->identity, trust_change); | ||
409 | hs = 0; | ||
410 | im = (struct InfoMessage *) buf; | ||
411 | if (pos->hello != NULL) | ||
412 | { | ||
413 | hs = GNUNET_HELLO_size (pos->hello); | ||
414 | GNUNET_assert (hs < | ||
415 | GNUNET_SERVER_MAX_MESSAGE_SIZE - | ||
416 | sizeof (struct InfoMessage)); | ||
417 | memcpy (&im[1], pos->hello, hs); | ||
418 | } | ||
419 | im->trust = htonl (pos->trust); | ||
420 | im->peer = pos->identity; | ||
421 | end = &im->header; | ||
422 | GNUNET_SERVER_transmit_context_append (tc, | ||
423 | &end[1], | ||
424 | hs + | ||
425 | sizeof (struct InfoMessage) - | ||
426 | sizeof (struct | ||
427 | GNUNET_MessageHeader), | ||
428 | GNUNET_MESSAGE_TYPE_PEERINFO_INFO); | ||
429 | } | ||
430 | pos = pos->next; | ||
431 | } | ||
432 | GNUNET_SERVER_transmit_context_append (tc, NULL, 0, | ||
433 | GNUNET_MESSAGE_TYPE_PEERINFO_INFO_END); | ||
434 | GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL); | ||
435 | } | ||
436 | |||
437 | |||
438 | /** | ||
439 | * Write host-trust information to a file - flush the buffer entry! | ||
440 | * Assumes synchronized access. | ||
441 | */ | ||
442 | static void | ||
443 | flush_trust (struct HostEntry *host) | ||
444 | { | ||
445 | char *fn; | ||
446 | uint32_t trust; | ||
447 | |||
448 | if (host->trust == host->disk_trust) | ||
449 | return; /* unchanged */ | ||
450 | fn = get_trust_filename (&host->identity); | ||
451 | if (host->trust == 0) | ||
452 | { | ||
453 | if ((0 != UNLINK (fn)) && (errno != ENOENT)) | ||
454 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING | | ||
455 | GNUNET_ERROR_TYPE_BULK, "unlink", fn); | ||
456 | } | ||
457 | else | ||
458 | { | ||
459 | trust = htonl (host->trust); | ||
460 | if (GNUNET_OK == | ||
461 | GNUNET_DISK_file_write (fn, &trust, sizeof (uint32_t), "644")) | ||
462 | host->disk_trust = host->trust; | ||
463 | } | ||
464 | GNUNET_free (fn); | ||
465 | } | ||
466 | |||
467 | /** | ||
468 | * Call this method periodically to scan data/hosts for new hosts. | ||
469 | */ | ||
470 | static void | ||
471 | cron_flush_trust (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) | ||
472 | { | ||
473 | struct HostEntry *pos; | ||
474 | |||
475 | pos = hosts; | ||
476 | while (pos != NULL) | ||
477 | { | ||
478 | flush_trust (pos); | ||
479 | pos = pos->next; | ||
480 | } | ||
481 | if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) | ||
482 | GNUNET_SCHEDULER_add_delayed (tc->sched, | ||
483 | GNUNET_YES, | ||
484 | GNUNET_SCHEDULER_PRIORITY_KEEP, | ||
485 | GNUNET_SCHEDULER_NO_PREREQUISITE_TASK, | ||
486 | TRUST_FLUSH_FREQ, &cron_flush_trust, NULL); | ||
487 | } | ||
488 | |||
489 | |||
490 | /** | ||
491 | * @brief delete expired HELLO entries in data/hosts/ | ||
492 | */ | ||
493 | static int | ||
494 | discard_hosts_helper (void *cls, const char *fn) | ||
495 | { | ||
496 | struct GNUNET_TIME_Absolute *now = cls; | ||
497 | char buffer[GNUNET_SERVER_MAX_MESSAGE_SIZE]; | ||
498 | const struct GNUNET_HELLO_Message *hello; | ||
499 | struct GNUNET_HELLO_Message *new_hello; | ||
500 | int size; | ||
501 | |||
502 | size = GNUNET_DISK_file_read (fn, sizeof (buffer), buffer); | ||
503 | if ((size < sizeof (struct GNUNET_MessageHeader)) && (0 != UNLINK (fn))) | ||
504 | { | ||
505 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING | | ||
506 | GNUNET_ERROR_TYPE_BULK, "unlink", fn); | ||
507 | return GNUNET_OK; | ||
508 | } | ||
509 | hello = (const struct GNUNET_HELLO_Message *) buffer; | ||
510 | new_hello = GNUNET_HELLO_iterate_addresses (hello, | ||
511 | GNUNET_YES, | ||
512 | &discard_expired, now); | ||
513 | if ((new_hello == NULL) && (0 != UNLINK (fn))) | ||
514 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING | | ||
515 | GNUNET_ERROR_TYPE_BULK, "unlink", fn); | ||
516 | if (new_hello != NULL) | ||
517 | { | ||
518 | GNUNET_DISK_file_write (fn, | ||
519 | new_hello, | ||
520 | GNUNET_HELLO_size (new_hello), "644"); | ||
521 | GNUNET_free (new_hello); | ||
522 | } | ||
523 | return GNUNET_OK; | ||
524 | } | ||
525 | |||
526 | |||
527 | /** | ||
528 | * Call this method periodically to scan data/hosts for new hosts. | ||
529 | */ | ||
530 | static void | ||
531 | cron_clean_data_hosts (void *cls, | ||
532 | const struct GNUNET_SCHEDULER_TaskContext *tc) | ||
533 | { | ||
534 | struct GNUNET_TIME_Absolute now; | ||
535 | |||
536 | now = GNUNET_TIME_absolute_get (); | ||
537 | GNUNET_DISK_directory_scan (networkIdDirectory, | ||
538 | &discard_hosts_helper, &now); | ||
539 | |||
540 | GNUNET_SCHEDULER_add_delayed (tc->sched, | ||
541 | GNUNET_NO, | ||
542 | GNUNET_SCHEDULER_PRIORITY_KEEP, | ||
543 | GNUNET_SCHEDULER_NO_PREREQUISITE_TASK, | ||
544 | DATA_HOST_CLEAN_FREQ, | ||
545 | &cron_clean_data_hosts, NULL); | ||
546 | } | ||
547 | |||
548 | |||
549 | /** | ||
550 | * Handle ADD-message. | ||
551 | * | ||
552 | * @param cls closure | ||
553 | * @param server the server handling the message | ||
554 | * @param client identification of the client | ||
555 | * @param message the actual message | ||
556 | */ | ||
557 | static void | ||
558 | handle_add (void *cls, | ||
559 | struct GNUNET_SERVER_Handle *server, | ||
560 | struct GNUNET_SERVER_Client *client, | ||
561 | const struct GNUNET_MessageHeader *message) | ||
562 | { | ||
563 | const struct PeerAddMessage *pam; | ||
564 | const struct GNUNET_MessageHeader *hello; | ||
565 | uint16_t size; | ||
566 | |||
567 | size = ntohs (message->size); | ||
568 | if (size < | ||
569 | sizeof (struct PeerAddMessage) + sizeof (struct GNUNET_MessageHeader)) | ||
570 | { | ||
571 | GNUNET_break (0); | ||
572 | GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); | ||
573 | return; | ||
574 | } | ||
575 | pam = (const struct PeerAddMessage *) message; | ||
576 | hello = (const struct GNUNET_MessageHeader *) &pam[1]; | ||
577 | if (size != sizeof (struct PeerAddMessage) + ntohs (hello->size)) | ||
578 | { | ||
579 | GNUNET_break (0); | ||
580 | GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); | ||
581 | return; | ||
582 | } | ||
583 | bind_address (&pam->peer, (const struct GNUNET_HELLO_Message *) hello); | ||
584 | GNUNET_SERVER_receive_done (client, GNUNET_OK); | ||
585 | } | ||
586 | |||
587 | |||
588 | /** | ||
589 | * Handle GET-message. | ||
590 | * | ||
591 | * @param cls closure | ||
592 | * @param server the server handling the message | ||
593 | * @param client identification of the client | ||
594 | * @param message the actual message | ||
595 | */ | ||
596 | static void | ||
597 | handle_get (void *cls, | ||
598 | struct GNUNET_SERVER_Handle *server, | ||
599 | struct GNUNET_SERVER_Client *client, | ||
600 | const struct GNUNET_MessageHeader *message) | ||
601 | { | ||
602 | const struct ListPeerMessage *lpm; | ||
603 | |||
604 | lpm = (const struct ListPeerMessage *) message; | ||
605 | send_to_each_host (&lpm->peer, ntohl (lpm->trust_change), client, server); | ||
606 | } | ||
607 | |||
608 | |||
609 | /** | ||
610 | * Handle GET-ALL-message. | ||
611 | * | ||
612 | * @param cls closure | ||
613 | * @param server the server handling the message | ||
614 | * @param client identification of the client | ||
615 | * @param message the actual message | ||
616 | */ | ||
617 | static void | ||
618 | handle_get_all (void *cls, | ||
619 | struct GNUNET_SERVER_Handle *server, | ||
620 | struct GNUNET_SERVER_Client *client, | ||
621 | const struct GNUNET_MessageHeader *message) | ||
622 | { | ||
623 | const struct ListAllPeersMessage *lpm; | ||
624 | |||
625 | lpm = (const struct ListAllPeersMessage *) message; | ||
626 | send_to_each_host (NULL, ntohl (lpm->trust_change), client, server); | ||
627 | } | ||
628 | |||
629 | |||
630 | /** | ||
631 | * List of handlers for the messages understood by this | ||
632 | * service. | ||
633 | */ | ||
634 | static struct GNUNET_SERVER_MessageHandler handlers[] = { | ||
635 | {&handle_add, NULL, GNUNET_MESSAGE_TYPE_PEERINFO_ADD, 0}, | ||
636 | {&handle_get, NULL, GNUNET_MESSAGE_TYPE_PEERINFO_GET, | ||
637 | sizeof (struct ListPeerMessage)}, | ||
638 | {&handle_get_all, NULL, GNUNET_MESSAGE_TYPE_PEERINFO_GET_ALL, | ||
639 | sizeof (struct ListAllPeersMessage)}, | ||
640 | {NULL, NULL, 0, 0} | ||
641 | }; | ||
642 | |||
643 | |||
644 | /** | ||
645 | * Process statistics requests. | ||
646 | * | ||
647 | * @param cls closure | ||
648 | * @param sched scheduler to use | ||
649 | * @param server the initialized server | ||
650 | * @param cfg configuration to use | ||
651 | */ | ||
652 | static void | ||
653 | run (void *cls, | ||
654 | struct GNUNET_SCHEDULER_Handle *sched, | ||
655 | struct GNUNET_SERVER_Handle *server, | ||
656 | struct GNUNET_CONFIGURATION_Handle *cfg) | ||
657 | { | ||
658 | GNUNET_assert (GNUNET_OK == | ||
659 | GNUNET_CONFIGURATION_get_value_filename (cfg, | ||
660 | "peerinfo", | ||
661 | "HOSTS", | ||
662 | &networkIdDirectory)); | ||
663 | GNUNET_assert (GNUNET_OK == | ||
664 | GNUNET_CONFIGURATION_get_value_filename (cfg, | ||
665 | "peerinfo", | ||
666 | "TRUST", | ||
667 | &trustDirectory)); | ||
668 | GNUNET_DISK_directory_create (networkIdDirectory); | ||
669 | GNUNET_DISK_directory_create (trustDirectory); | ||
670 | GNUNET_SCHEDULER_add_delayed (sched, | ||
671 | GNUNET_NO, | ||
672 | GNUNET_SCHEDULER_PRIORITY_IDLE, | ||
673 | GNUNET_SCHEDULER_NO_PREREQUISITE_TASK, | ||
674 | GNUNET_TIME_UNIT_MILLISECONDS, | ||
675 | &cron_scan_directory_data_hosts, NULL); | ||
676 | GNUNET_SCHEDULER_add_delayed (sched, | ||
677 | GNUNET_YES, | ||
678 | GNUNET_SCHEDULER_PRIORITY_HIGH, | ||
679 | GNUNET_SCHEDULER_NO_PREREQUISITE_TASK, | ||
680 | TRUST_FLUSH_FREQ, &cron_flush_trust, NULL); | ||
681 | GNUNET_SCHEDULER_add_delayed (sched, | ||
682 | GNUNET_NO, | ||
683 | GNUNET_SCHEDULER_PRIORITY_IDLE, | ||
684 | GNUNET_SCHEDULER_NO_PREREQUISITE_TASK, | ||
685 | DATA_HOST_CLEAN_FREQ, | ||
686 | &cron_clean_data_hosts, NULL); | ||
687 | GNUNET_SERVER_add_handlers (server, handlers); | ||
688 | } | ||
689 | |||
690 | |||
691 | /** | ||
692 | * The main function for the statistics service. | ||
693 | * | ||
694 | * @param argc number of arguments from the command line | ||
695 | * @param argv command line arguments | ||
696 | * @return 0 ok, 1 on error | ||
697 | */ | ||
698 | int | ||
699 | main (int argc, char *const *argv) | ||
700 | { | ||
701 | return (GNUNET_OK == | ||
702 | GNUNET_SERVICE_run (argc, | ||
703 | argv, | ||
704 | "peerinfo", &run, NULL, NULL, NULL)) ? 0 : 1; | ||
705 | } | ||
706 | |||
707 | |||
708 | /* end of gnunet-service-peerinfo.c */ | ||