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author | Bart Polot <bart@net.in.tum.de> | 2014-05-07 12:07:44 +0000 |
---|---|---|
committer | Bart Polot <bart@net.in.tum.de> | 2014-05-07 12:07:44 +0000 |
commit | 848b0e9e3a4d586050d05aa4f3f796e1f978480e (patch) | |
tree | 23d003d67a1bc3c8a7bb7c0cb2d8d001d9dfe4c5 /src/fs/gnunet-service-fs_cadet_server.c | |
parent | f81693562ebc217bf2b8c614fdae799a00c3656e (diff) | |
download | gnunet-848b0e9e3a4d586050d05aa4f3f796e1f978480e.tar.gz gnunet-848b0e9e3a4d586050d05aa4f3f796e1f978480e.zip |
- update fs
Diffstat (limited to 'src/fs/gnunet-service-fs_cadet_server.c')
-rw-r--r-- | src/fs/gnunet-service-fs_cadet_server.c | 595 |
1 files changed, 595 insertions, 0 deletions
diff --git a/src/fs/gnunet-service-fs_cadet_server.c b/src/fs/gnunet-service-fs_cadet_server.c new file mode 100644 index 000000000..77add757d --- /dev/null +++ b/src/fs/gnunet-service-fs_cadet_server.c | |||
@@ -0,0 +1,595 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2012, 2013 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 3, 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 fs/gnunet-service-fs_cadet_server.c | ||
23 | * @brief non-anonymous file-transfer | ||
24 | * @author Christian Grothoff | ||
25 | * | ||
26 | * TODO: | ||
27 | * - PORT is set to old application type, unsure if we should keep | ||
28 | * it that way (fine for now) | ||
29 | */ | ||
30 | #include "platform.h" | ||
31 | #include "gnunet_constants.h" | ||
32 | #include "gnunet_util_lib.h" | ||
33 | #include "gnunet_cadet_service.h" | ||
34 | #include "gnunet_protocols.h" | ||
35 | #include "gnunet_applications.h" | ||
36 | #include "gnunet-service-fs.h" | ||
37 | #include "gnunet-service-fs_indexing.h" | ||
38 | #include "gnunet-service-fs_cadet.h" | ||
39 | |||
40 | /** | ||
41 | * After how long do we termiante idle connections? | ||
42 | */ | ||
43 | #define IDLE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 2) | ||
44 | |||
45 | |||
46 | /** | ||
47 | * A message in the queue to be written to the cadet. | ||
48 | */ | ||
49 | struct WriteQueueItem | ||
50 | { | ||
51 | /** | ||
52 | * Kept in a DLL. | ||
53 | */ | ||
54 | struct WriteQueueItem *next; | ||
55 | |||
56 | /** | ||
57 | * Kept in a DLL. | ||
58 | */ | ||
59 | struct WriteQueueItem *prev; | ||
60 | |||
61 | /** | ||
62 | * Number of bytes of payload, allocated at the end of this struct. | ||
63 | */ | ||
64 | size_t msize; | ||
65 | }; | ||
66 | |||
67 | |||
68 | /** | ||
69 | * Information we keep around for each active cadeting client. | ||
70 | */ | ||
71 | struct CadetClient | ||
72 | { | ||
73 | /** | ||
74 | * DLL | ||
75 | */ | ||
76 | struct CadetClient *next; | ||
77 | |||
78 | /** | ||
79 | * DLL | ||
80 | */ | ||
81 | struct CadetClient *prev; | ||
82 | |||
83 | /** | ||
84 | * Channel for communication. | ||
85 | */ | ||
86 | struct GNUNET_CADET_Channel *channel; | ||
87 | |||
88 | /** | ||
89 | * Handle for active write operation, or NULL. | ||
90 | */ | ||
91 | struct GNUNET_CADET_TransmitHandle *wh; | ||
92 | |||
93 | /** | ||
94 | * Head of write queue. | ||
95 | */ | ||
96 | struct WriteQueueItem *wqi_head; | ||
97 | |||
98 | /** | ||
99 | * Tail of write queue. | ||
100 | */ | ||
101 | struct WriteQueueItem *wqi_tail; | ||
102 | |||
103 | /** | ||
104 | * Current active request to the datastore, if we have one pending. | ||
105 | */ | ||
106 | struct GNUNET_DATASTORE_QueueEntry *qe; | ||
107 | |||
108 | /** | ||
109 | * Task that is scheduled to asynchronously terminate the connection. | ||
110 | */ | ||
111 | GNUNET_SCHEDULER_TaskIdentifier terminate_task; | ||
112 | |||
113 | /** | ||
114 | * Task that is scheduled to terminate idle connections. | ||
115 | */ | ||
116 | GNUNET_SCHEDULER_TaskIdentifier timeout_task; | ||
117 | |||
118 | /** | ||
119 | * Size of the last write that was initiated. | ||
120 | */ | ||
121 | size_t reply_size; | ||
122 | |||
123 | }; | ||
124 | |||
125 | |||
126 | /** | ||
127 | * Listen channel for incoming requests. | ||
128 | */ | ||
129 | static struct GNUNET_CADET_Handle *listen_channel; | ||
130 | |||
131 | /** | ||
132 | * Head of DLL of cadet clients. | ||
133 | */ | ||
134 | static struct CadetClient *sc_head; | ||
135 | |||
136 | /** | ||
137 | * Tail of DLL of cadet clients. | ||
138 | */ | ||
139 | static struct CadetClient *sc_tail; | ||
140 | |||
141 | /** | ||
142 | * Number of active cadet clients in the 'sc_*'-DLL. | ||
143 | */ | ||
144 | static unsigned int sc_count; | ||
145 | |||
146 | /** | ||
147 | * Maximum allowed number of cadet clients. | ||
148 | */ | ||
149 | static unsigned long long sc_count_max; | ||
150 | |||
151 | |||
152 | |||
153 | /** | ||
154 | * Task run to asynchronously terminate the cadet due to timeout. | ||
155 | * | ||
156 | * @param cls the 'struct CadetClient' | ||
157 | * @param tc scheduler context | ||
158 | */ | ||
159 | static void | ||
160 | timeout_cadet_task (void *cls, | ||
161 | const struct GNUNET_SCHEDULER_TaskContext *tc) | ||
162 | { | ||
163 | struct CadetClient *sc = cls; | ||
164 | struct GNUNET_CADET_Channel *tun; | ||
165 | |||
166 | sc->timeout_task = GNUNET_SCHEDULER_NO_TASK; | ||
167 | tun = sc->channel; | ||
168 | sc->channel = NULL; | ||
169 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
170 | "Timeout for inactive cadet client %p\n", | ||
171 | sc); | ||
172 | GNUNET_CADET_channel_destroy (tun); | ||
173 | } | ||
174 | |||
175 | |||
176 | /** | ||
177 | * Reset the timeout for the cadet client (due to activity). | ||
178 | * | ||
179 | * @param sc client handle to reset timeout for | ||
180 | */ | ||
181 | static void | ||
182 | refresh_timeout_task (struct CadetClient *sc) | ||
183 | { | ||
184 | if (GNUNET_SCHEDULER_NO_TASK != sc->timeout_task) | ||
185 | GNUNET_SCHEDULER_cancel (sc->timeout_task); | ||
186 | sc->timeout_task = GNUNET_SCHEDULER_add_delayed (IDLE_TIMEOUT, | ||
187 | &timeout_cadet_task, | ||
188 | sc); | ||
189 | } | ||
190 | |||
191 | |||
192 | /** | ||
193 | * We're done handling a request from a client, read the next one. | ||
194 | * | ||
195 | * @param sc client to continue reading requests from | ||
196 | */ | ||
197 | static void | ||
198 | continue_reading (struct CadetClient *sc) | ||
199 | { | ||
200 | refresh_timeout_task (sc); | ||
201 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
202 | "Finished processing cadet request from client %p, ready to receive the next one\n", | ||
203 | sc); | ||
204 | GNUNET_CADET_receive_done (sc->channel); | ||
205 | } | ||
206 | |||
207 | |||
208 | /** | ||
209 | * Transmit the next entry from the write queue. | ||
210 | * | ||
211 | * @param sc where to process the write queue | ||
212 | */ | ||
213 | static void | ||
214 | continue_writing (struct CadetClient *sc); | ||
215 | |||
216 | |||
217 | /** | ||
218 | * Send a reply now, cadet is ready. | ||
219 | * | ||
220 | * @param cls closure with the `struct CadetClient` which sent the query | ||
221 | * @param size number of bytes available in @a buf | ||
222 | * @param buf where to write the message | ||
223 | * @return number of bytes written to @a buf | ||
224 | */ | ||
225 | static size_t | ||
226 | write_continuation (void *cls, | ||
227 | size_t size, | ||
228 | void *buf) | ||
229 | { | ||
230 | struct CadetClient *sc = cls; | ||
231 | struct GNUNET_CADET_Channel *tun; | ||
232 | struct WriteQueueItem *wqi; | ||
233 | size_t ret; | ||
234 | |||
235 | sc->wh = NULL; | ||
236 | if (NULL == (wqi = sc->wqi_head)) | ||
237 | { | ||
238 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
239 | "Write queue empty, reading more requests\n"); | ||
240 | return 0; | ||
241 | } | ||
242 | if ( (0 == size) || | ||
243 | (size < wqi->msize) ) | ||
244 | { | ||
245 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
246 | "Transmission of reply failed, terminating cadet\n"); | ||
247 | tun = sc->channel; | ||
248 | sc->channel = NULL; | ||
249 | GNUNET_CADET_channel_destroy (tun); | ||
250 | return 0; | ||
251 | } | ||
252 | GNUNET_CONTAINER_DLL_remove (sc->wqi_head, | ||
253 | sc->wqi_tail, | ||
254 | wqi); | ||
255 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
256 | "Transmitted %u byte reply via cadet to %p\n", | ||
257 | (unsigned int) size, | ||
258 | sc); | ||
259 | GNUNET_STATISTICS_update (GSF_stats, | ||
260 | gettext_noop ("# Blocks transferred via cadet"), 1, | ||
261 | GNUNET_NO); | ||
262 | memcpy (buf, &wqi[1], ret = wqi->msize); | ||
263 | GNUNET_free (wqi); | ||
264 | continue_writing (sc); | ||
265 | return ret; | ||
266 | } | ||
267 | |||
268 | |||
269 | /** | ||
270 | * Transmit the next entry from the write queue. | ||
271 | * | ||
272 | * @param sc where to process the write queue | ||
273 | */ | ||
274 | static void | ||
275 | continue_writing (struct CadetClient *sc) | ||
276 | { | ||
277 | struct WriteQueueItem *wqi; | ||
278 | struct GNUNET_CADET_Channel *tun; | ||
279 | |||
280 | if (NULL != sc->wh) | ||
281 | { | ||
282 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
283 | "Write pending, waiting for it to complete\n"); | ||
284 | return; /* write already pending */ | ||
285 | } | ||
286 | if (NULL == (wqi = sc->wqi_head)) | ||
287 | { | ||
288 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
289 | "Write queue empty, reading more requests\n"); | ||
290 | continue_reading (sc); | ||
291 | return; | ||
292 | } | ||
293 | sc->wh = GNUNET_CADET_notify_transmit_ready (sc->channel, GNUNET_NO, | ||
294 | GNUNET_TIME_UNIT_FOREVER_REL, | ||
295 | wqi->msize, | ||
296 | &write_continuation, | ||
297 | sc); | ||
298 | if (NULL == sc->wh) | ||
299 | { | ||
300 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
301 | "Write failed; terminating cadet\n"); | ||
302 | tun = sc->channel; | ||
303 | sc->channel = NULL; | ||
304 | GNUNET_CADET_channel_destroy (tun); | ||
305 | return; | ||
306 | } | ||
307 | } | ||
308 | |||
309 | |||
310 | /** | ||
311 | * Process a datum that was stored in the datastore. | ||
312 | * | ||
313 | * @param cls closure with the `struct CadetClient` which sent the query | ||
314 | * @param key key for the content | ||
315 | * @param size number of bytes in @a data | ||
316 | * @param data content stored | ||
317 | * @param type type of the content | ||
318 | * @param priority priority of the content | ||
319 | * @param anonymity anonymity-level for the content | ||
320 | * @param expiration expiration time for the content | ||
321 | * @param uid unique identifier for the datum; | ||
322 | * maybe 0 if no unique identifier is available | ||
323 | */ | ||
324 | static void | ||
325 | handle_datastore_reply (void *cls, | ||
326 | const struct GNUNET_HashCode *key, | ||
327 | size_t size, const void *data, | ||
328 | enum GNUNET_BLOCK_Type type, | ||
329 | uint32_t priority, | ||
330 | uint32_t anonymity, | ||
331 | struct GNUNET_TIME_Absolute expiration, | ||
332 | uint64_t uid) | ||
333 | { | ||
334 | struct CadetClient *sc = cls; | ||
335 | size_t msize = size + sizeof (struct CadetReplyMessage); | ||
336 | struct WriteQueueItem *wqi; | ||
337 | struct CadetReplyMessage *srm; | ||
338 | |||
339 | sc->qe = NULL; | ||
340 | if (NULL == data) | ||
341 | { | ||
342 | /* no result, this should not really happen, as for | ||
343 | non-anonymous routing only peers that HAVE the | ||
344 | answers should be queried; OTOH, this is not a | ||
345 | hard error as we might have had the answer in the | ||
346 | past and the user might have unindexed it. Hence | ||
347 | we log at level "INFO" for now. */ | ||
348 | GNUNET_log (GNUNET_ERROR_TYPE_INFO, | ||
349 | "Have no answer for query `%s'\n", | ||
350 | GNUNET_h2s (key)); | ||
351 | GNUNET_STATISTICS_update (GSF_stats, | ||
352 | gettext_noop ("# queries received via cadet not answered"), 1, | ||
353 | GNUNET_NO); | ||
354 | continue_writing (sc); | ||
355 | return; | ||
356 | } | ||
357 | if (GNUNET_BLOCK_TYPE_FS_ONDEMAND == type) | ||
358 | { | ||
359 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
360 | "Performing on-demand encoding for query %s\n", | ||
361 | GNUNET_h2s (key)); | ||
362 | if (GNUNET_OK != | ||
363 | GNUNET_FS_handle_on_demand_block (key, | ||
364 | size, data, type, | ||
365 | priority, anonymity, | ||
366 | expiration, uid, | ||
367 | &handle_datastore_reply, | ||
368 | sc)) | ||
369 | { | ||
370 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
371 | "On-demand encoding request failed\n"); | ||
372 | continue_writing (sc); | ||
373 | } | ||
374 | return; | ||
375 | } | ||
376 | if (msize > GNUNET_SERVER_MAX_MESSAGE_SIZE) | ||
377 | { | ||
378 | GNUNET_break (0); | ||
379 | continue_writing (sc); | ||
380 | return; | ||
381 | } | ||
382 | GNUNET_break (GNUNET_BLOCK_TYPE_ANY != type); | ||
383 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
384 | "Starting transmission of %u byte reply of type %d for query `%s' via cadet to %p\n", | ||
385 | (unsigned int) size, | ||
386 | (unsigned int) type, | ||
387 | GNUNET_h2s (key), | ||
388 | sc); | ||
389 | wqi = GNUNET_malloc (sizeof (struct WriteQueueItem) + msize); | ||
390 | wqi->msize = msize; | ||
391 | srm = (struct CadetReplyMessage *) &wqi[1]; | ||
392 | srm->header.size = htons ((uint16_t) msize); | ||
393 | srm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_CADET_REPLY); | ||
394 | srm->type = htonl (type); | ||
395 | srm->expiration = GNUNET_TIME_absolute_hton (expiration); | ||
396 | memcpy (&srm[1], data, size); | ||
397 | sc->reply_size = msize; | ||
398 | GNUNET_CONTAINER_DLL_insert (sc->wqi_head, | ||
399 | sc->wqi_tail, | ||
400 | wqi); | ||
401 | continue_writing (sc); | ||
402 | } | ||
403 | |||
404 | |||
405 | /** | ||
406 | * Functions with this signature are called whenever a | ||
407 | * complete query message is received. | ||
408 | * | ||
409 | * Do not call #GNUNET_SERVER_mst_destroy in callback | ||
410 | * | ||
411 | * @param cls closure with the 'struct CadetClient' | ||
412 | * @param channel channel handle | ||
413 | * @param channel_ctx channel context | ||
414 | * @param message the actual message | ||
415 | * @return #GNUNET_OK on success, #GNUNET_SYSERR to stop further processing | ||
416 | */ | ||
417 | static int | ||
418 | request_cb (void *cls, | ||
419 | struct GNUNET_CADET_Channel *channel, | ||
420 | void **channel_ctx, | ||
421 | const struct GNUNET_MessageHeader *message) | ||
422 | { | ||
423 | struct CadetClient *sc = *channel_ctx; | ||
424 | const struct CadetQueryMessage *sqm; | ||
425 | |||
426 | sqm = (const struct CadetQueryMessage *) message; | ||
427 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
428 | "Received query for `%s' via cadet from client %p\n", | ||
429 | GNUNET_h2s (&sqm->query), | ||
430 | sc); | ||
431 | GNUNET_STATISTICS_update (GSF_stats, | ||
432 | gettext_noop ("# queries received via cadet"), 1, | ||
433 | GNUNET_NO); | ||
434 | refresh_timeout_task (sc); | ||
435 | sc->qe = GNUNET_DATASTORE_get_key (GSF_dsh, | ||
436 | 0, | ||
437 | &sqm->query, | ||
438 | ntohl (sqm->type), | ||
439 | 0 /* priority */, | ||
440 | GSF_datastore_queue_size, | ||
441 | GNUNET_TIME_UNIT_FOREVER_REL, | ||
442 | &handle_datastore_reply, sc); | ||
443 | if (NULL == sc->qe) | ||
444 | { | ||
445 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
446 | "Queueing request with datastore failed (queue full?)\n"); | ||
447 | continue_writing (sc); | ||
448 | } | ||
449 | return GNUNET_OK; | ||
450 | } | ||
451 | |||
452 | |||
453 | /** | ||
454 | * Functions of this type are called upon new cadet connection from other peers. | ||
455 | * | ||
456 | * @param cls the closure from GNUNET_CADET_connect | ||
457 | * @param channel the channel representing the cadet | ||
458 | * @param initiator the identity of the peer who wants to establish a cadet | ||
459 | * with us; NULL on binding error | ||
460 | * @param port cadet port used for the incoming connection | ||
461 | * @param options channel option flags | ||
462 | * @return initial channel context (our 'struct CadetClient') | ||
463 | */ | ||
464 | static void * | ||
465 | accept_cb (void *cls, | ||
466 | struct GNUNET_CADET_Channel *channel, | ||
467 | const struct GNUNET_PeerIdentity *initiator, | ||
468 | uint32_t port, enum GNUNET_CADET_ChannelOption options) | ||
469 | { | ||
470 | struct CadetClient *sc; | ||
471 | |||
472 | GNUNET_assert (NULL != channel); | ||
473 | if (sc_count >= sc_count_max) | ||
474 | { | ||
475 | GNUNET_STATISTICS_update (GSF_stats, | ||
476 | gettext_noop ("# cadet client connections rejected"), 1, | ||
477 | GNUNET_NO); | ||
478 | GNUNET_CADET_channel_destroy (channel); | ||
479 | return NULL; | ||
480 | } | ||
481 | GNUNET_STATISTICS_update (GSF_stats, | ||
482 | gettext_noop ("# cadet connections active"), 1, | ||
483 | GNUNET_NO); | ||
484 | sc = GNUNET_new (struct CadetClient); | ||
485 | sc->channel = channel; | ||
486 | GNUNET_CONTAINER_DLL_insert (sc_head, | ||
487 | sc_tail, | ||
488 | sc); | ||
489 | sc_count++; | ||
490 | refresh_timeout_task (sc); | ||
491 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
492 | "Accepting inbound cadet connection from `%s' as client %p\n", | ||
493 | GNUNET_i2s (initiator), | ||
494 | sc); | ||
495 | return sc; | ||
496 | } | ||
497 | |||
498 | |||
499 | /** | ||
500 | * Function called by cadet when a client disconnects. | ||
501 | * Cleans up our 'struct CadetClient' of that channel. | ||
502 | * | ||
503 | * @param cls NULL | ||
504 | * @param channel channel of the disconnecting client | ||
505 | * @param channel_ctx our 'struct CadetClient' | ||
506 | */ | ||
507 | static void | ||
508 | cleaner_cb (void *cls, | ||
509 | const struct GNUNET_CADET_Channel *channel, | ||
510 | void *channel_ctx) | ||
511 | { | ||
512 | struct CadetClient *sc = channel_ctx; | ||
513 | struct WriteQueueItem *wqi; | ||
514 | |||
515 | if (NULL == sc) | ||
516 | return; | ||
517 | sc->channel = NULL; | ||
518 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
519 | "Terminating cadet connection with client %p\n", | ||
520 | sc); | ||
521 | GNUNET_STATISTICS_update (GSF_stats, | ||
522 | gettext_noop ("# cadet connections active"), -1, | ||
523 | GNUNET_NO); | ||
524 | if (GNUNET_SCHEDULER_NO_TASK != sc->terminate_task) | ||
525 | GNUNET_SCHEDULER_cancel (sc->terminate_task); | ||
526 | if (GNUNET_SCHEDULER_NO_TASK != sc->timeout_task) | ||
527 | GNUNET_SCHEDULER_cancel (sc->timeout_task); | ||
528 | if (NULL != sc->wh) | ||
529 | GNUNET_CADET_notify_transmit_ready_cancel (sc->wh); | ||
530 | if (NULL != sc->qe) | ||
531 | GNUNET_DATASTORE_cancel (sc->qe); | ||
532 | while (NULL != (wqi = sc->wqi_head)) | ||
533 | { | ||
534 | GNUNET_CONTAINER_DLL_remove (sc->wqi_head, | ||
535 | sc->wqi_tail, | ||
536 | wqi); | ||
537 | GNUNET_free (wqi); | ||
538 | } | ||
539 | GNUNET_CONTAINER_DLL_remove (sc_head, | ||
540 | sc_tail, | ||
541 | sc); | ||
542 | sc_count--; | ||
543 | GNUNET_free (sc); | ||
544 | } | ||
545 | |||
546 | |||
547 | /** | ||
548 | * Initialize subsystem for non-anonymous file-sharing. | ||
549 | */ | ||
550 | void | ||
551 | GSF_cadet_start_server () | ||
552 | { | ||
553 | static const struct GNUNET_CADET_MessageHandler handlers[] = { | ||
554 | { &request_cb, GNUNET_MESSAGE_TYPE_FS_CADET_QUERY, sizeof (struct CadetQueryMessage)}, | ||
555 | { NULL, 0, 0 } | ||
556 | }; | ||
557 | static const uint32_t ports[] = { | ||
558 | GNUNET_APPLICATION_TYPE_FS_BLOCK_TRANSFER, | ||
559 | 0 | ||
560 | }; | ||
561 | |||
562 | if (GNUNET_YES != | ||
563 | GNUNET_CONFIGURATION_get_value_number (GSF_cfg, | ||
564 | "fs", | ||
565 | "MAX_CADET_CLIENTS", | ||
566 | &sc_count_max)) | ||
567 | return; | ||
568 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
569 | "Initializing cadet FS server with a limit of %llu connections\n", | ||
570 | sc_count_max); | ||
571 | listen_channel = GNUNET_CADET_connect (GSF_cfg, | ||
572 | NULL, | ||
573 | &accept_cb, | ||
574 | &cleaner_cb, | ||
575 | handlers, | ||
576 | ports); | ||
577 | } | ||
578 | |||
579 | |||
580 | /** | ||
581 | * Shutdown subsystem for non-anonymous file-sharing. | ||
582 | */ | ||
583 | void | ||
584 | GSF_cadet_stop_server () | ||
585 | { | ||
586 | if (NULL != listen_channel) | ||
587 | { | ||
588 | GNUNET_CADET_disconnect (listen_channel); | ||
589 | listen_channel = NULL; | ||
590 | } | ||
591 | GNUNET_assert (NULL == sc_head); | ||
592 | GNUNET_assert (0 == sc_count); | ||
593 | } | ||
594 | |||
595 | /* end of gnunet-service-fs_cadet.c */ | ||