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diff --git a/src/dht/gnunet-service-xdht_clients.c b/src/dht/gnunet-service-xdht_clients.c
deleted file mode 100644
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--- a/src/dht/gnunet-service-xdht_clients.c
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2009, 2010, 2011, 2016 GNUnet e.V.
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., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19*/
20
21/**
22 * @file dht/gnunet-service-dht_clients.c
23 * @brief GNUnet DHT service's client management code
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 */
27
28#include "platform.h"
29#include "gnunet_constants.h"
30#include "gnunet_protocols.h"
31#include "gnunet_statistics_service.h"
32#include "gnunet-service-xdht.h"
33#include "gnunet-service-xdht_clients.h"
34#include "gnunet-service-xdht_datacache.h"
35#include "gnunet-service-xdht_neighbours.h"
36#include "dht.h"
37
38
39/**
40 * Should routing details be logged to stderr (for debugging)?
41 */
42#define LOG_TRAFFIC(kind,...) GNUNET_log_from (kind, "dht-traffic",__VA_ARGS__)
43
44#define LOG(kind,...) GNUNET_log_from (kind, "dht-clients",__VA_ARGS__)
45
46#define DEBUG(...) \
47 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
48
49/**
50 * Linked list of messages to send to clients.
51 */
52struct PendingMessage
53{
54 /**
55 * Pointer to next item in the list
56 */
57 struct PendingMessage *next;
58
59 /**
60 * Pointer to previous item in the list
61 */
62 struct PendingMessage *prev;
63
64 /**
65 * Actual message to be sent, allocated at the end of the struct:
66 * // msg = (cast) &pm[1];
67 * // GNUNET_memcpy (&pm[1], data, len);
68 */
69 const struct GNUNET_MessageHeader *msg;
70
71};
72
73
74/**
75 * Struct containing information about a client,
76 * handle to connect to it, and any pending messages
77 * that need to be sent to it.
78 */
79struct ClientList
80{
81 /**
82 * Linked list of active clients
83 */
84 struct ClientList *next;
85
86 /**
87 * Linked list of active clients
88 */
89 struct ClientList *prev;
90
91 /**
92 * The handle to this client
93 */
94 struct GNUNET_SERVER_Client *client_handle;
95
96 /**
97 * Handle to the current transmission request, NULL
98 * if none pending.
99 */
100 struct GNUNET_SERVER_TransmitHandle *transmit_handle;
101
102 /**
103 * Linked list of pending messages for this client
104 */
105 struct PendingMessage *pending_head;
106
107 /**
108 * Tail of linked list of pending messages for this client
109 */
110 struct PendingMessage *pending_tail;
111
112};
113
114
115/**
116 * Entry in the local forwarding map for a client's GET request.
117 */
118struct ClientQueryRecord
119{
120
121 /**
122 * The key this request was about
123 */
124 struct GNUNET_HashCode key;
125
126 /**
127 * Client responsible for the request.
128 */
129 struct ClientList *client;
130
131 /**
132 * Extended query (see gnunet_block_lib.h), allocated at the end of this struct.
133 */
134 const void *xquery;
135
136 /**
137 * Replies we have already seen for this request.
138 */
139 struct GNUNET_HashCode *seen_replies;
140
141 /**
142 * Pointer to this nodes heap location in the retry-heap (for fast removal)
143 */
144 struct GNUNET_CONTAINER_HeapNode *hnode;
145
146 /**
147 * What's the delay between re-try operations that we currently use for this
148 * request?
149 */
150 struct GNUNET_TIME_Relative retry_frequency;
151
152 /**
153 * What's the next time we should re-try this request?
154 */
155 struct GNUNET_TIME_Absolute retry_time;
156
157 /**
158 * The unique identifier of this request
159 */
160 uint64_t unique_id;
161
162 /**
163 * Number of bytes in xquery.
164 */
165 size_t xquery_size;
166
167 /**
168 * Number of entries in 'seen_replies'.
169 */
170 unsigned int seen_replies_count;
171
172 /**
173 * Desired replication level
174 */
175 uint32_t replication;
176
177 /**
178 * Any message options for this request
179 */
180 uint32_t msg_options;
181
182 /**
183 * The type for the data for the GET request.
184 */
185 enum GNUNET_BLOCK_Type type;
186
187};
188
189
190/**
191 * Struct containing paremeters of monitoring requests.
192 */
193struct ClientMonitorRecord
194{
195
196 /**
197 * Next element in DLL.
198 */
199 struct ClientMonitorRecord *next;
200
201 /**
202 * Previous element in DLL.
203 */
204 struct ClientMonitorRecord *prev;
205
206 /**
207 * Type of blocks that are of interest
208 */
209 enum GNUNET_BLOCK_Type type;
210
211 /**
212 * Key of data of interest, NULL for all.
213 */
214 struct GNUNET_HashCode *key;
215
216 /**
217 * Flag whether to notify about GET messages.
218 */
219 int16_t get;
220
221 /**
222 * Flag whether to notify about GET_REPONSE messages.
223 */
224 int16_t get_resp;
225
226 /**
227 * Flag whether to notify about PUT messages.
228 */
229 uint16_t put;
230
231 /**
232 * Client to notify of these requests.
233 */
234 struct ClientList *client;
235};
236
237
238/**
239 * List of active clients.
240 */
241static struct ClientList *client_head;
242
243/**
244 * List of active clients.
245 */
246static struct ClientList *client_tail;
247
248/**
249 * List of active monitoring requests.
250 */
251static struct ClientMonitorRecord *monitor_head;
252
253/**
254 * List of active monitoring requests.
255 */
256static struct ClientMonitorRecord *monitor_tail;
257
258/**
259 * Hashmap for fast key based lookup, maps keys to `struct ClientQueryRecord` entries.
260 */
261static struct GNUNET_CONTAINER_MultiHashMap *forward_map;
262
263/**
264 * Heap with all of our client's request, sorted by retry time (earliest on top).
265 */
266static struct GNUNET_CONTAINER_Heap *retry_heap;
267
268/**
269 * Task that re-transmits requests (using retry_heap).
270 */
271static struct GNUNET_SCHEDULER_Task * retry_task;
272
273
274/**
275 * Task run to check for messages that need to be sent to a client.
276 *
277 * @param client a ClientList, containing the client and any messages to be sent to it
278 */
279static void
280process_pending_messages (struct ClientList *client);
281
282
283/**
284 * Callback called as a result of issuing a GNUNET_SERVER_notify_transmit_ready
285 * request. A ClientList is passed as closure, take the head of the list
286 * and copy it into buf, which has the result of sending the message to the
287 * client.
288 *
289 * @param cls closure to this call
290 * @param size maximum number of bytes available to send
291 * @param buf where to copy the actual message to
292 *
293 * @return the number of bytes actually copied, 0 indicates failure
294 */
295static size_t
296send_reply_to_client (void *cls, size_t size, void *buf)
297{
298 struct ClientList *client = cls;
299 char *cbuf = buf;
300 struct PendingMessage *reply;
301 size_t off;
302 size_t msize;
303
304 client->transmit_handle = NULL;
305 if (buf == NULL)
306 {
307 /* client disconnected */
308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
309 "Client %p disconnected, pending messages will be discarded\n",
310 client->client_handle);
311 return 0;
312 }
313 off = 0;
314 while ((NULL != (reply = client->pending_head)) &&
315 (size >= off + (msize = ntohs (reply->msg->size))))
316 {
317 GNUNET_CONTAINER_DLL_remove (client->pending_head, client->pending_tail,
318 reply);
319 GNUNET_memcpy (&cbuf[off], reply->msg, msize);
320 GNUNET_free (reply);
321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
322 "Transmitting %u bytes to client %p\n",
323 (unsigned int) msize,
324 client->client_handle);
325 off += msize;
326 }
327 process_pending_messages (client);
328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
329 "Transmitted %u/%u bytes to client %p\n",
330 (unsigned int) off,
331 (unsigned int) size,
332 client->client_handle);
333 return off;
334}
335
336
337/**
338 * Task run to check for messages that need to be sent to a client.
339 *
340 * @param client a ClientList, containing the client and any messages to be sent to it
341 */
342static void
343process_pending_messages (struct ClientList *client)
344{
345 if ((client->pending_head == NULL) || (client->transmit_handle != NULL))
346 {
347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
348 "Not asking for transmission to %p now: %s\n",
349 client->client_handle,
350 client->pending_head ==
351 NULL ? "no more messages" : "request already pending");
352 return;
353 }
354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
355 "Asking for transmission of %u bytes to client %p\n",
356 ntohs (client->pending_head->msg->size), client->client_handle);
357 client->transmit_handle =
358 GNUNET_SERVER_notify_transmit_ready (client->client_handle,
359 ntohs (client->pending_head->
360 msg->size),
361 GNUNET_TIME_UNIT_FOREVER_REL,
362 &send_reply_to_client, client);
363}
364
365
366/**
367 * Add a PendingMessage to the clients list of messages to be sent
368 *
369 * @param client the active client to send the message to
370 * @param pending_message the actual message to send
371 */
372static void
373add_pending_message (struct ClientList *client,
374 struct PendingMessage *pending_message)
375{
376 GNUNET_CONTAINER_DLL_insert_tail (client->pending_head, client->pending_tail,
377 pending_message);
378 process_pending_messages (client);
379}
380
381
382/**
383 * Closure for 'forward_reply'
384 */
385struct ForwardReplyContext
386{
387
388 /**
389 * Actual message to send to matching clients.
390 */
391 struct PendingMessage *pm;
392
393 /**
394 * Embedded payload.
395 */
396 const void *data;
397
398 /**
399 * Type of the data.
400 */
401 enum GNUNET_BLOCK_Type type;
402
403 /**
404 * Number of bytes in data.
405 */
406 size_t data_size;
407
408 /**
409 * Do we need to copy 'pm' because it was already used?
410 */
411 int do_copy;
412
413};
414
415
416/**
417 * Find a client if it exists, add it otherwise.
418 *
419 * @param client the server handle to the client
420 *
421 * @return the client if found, a new client otherwise
422 */
423static struct ClientList *
424find_active_client (struct GNUNET_SERVER_Client *client)
425{
426 struct ClientList *pos = client_head;
427 struct ClientList *ret;
428
429 while (pos != NULL)
430 {
431 if (pos->client_handle == client)
432 return pos;
433 pos = pos->next;
434 }
435 ret = GNUNET_new (struct ClientList);
436 ret->client_handle = client;
437 GNUNET_CONTAINER_DLL_insert (client_head, client_tail, ret);
438 return ret;
439}
440
441
442/**
443 * Iterator over hash map entries that frees all entries
444 * associated with the given client.
445 *
446 * @param cls client to search for in source routes
447 * @param key current key code (ignored)
448 * @param value value in the hash map, a ClientQueryRecord
449 * @return #GNUNET_YES (we should continue to iterate)
450 */
451static int
452remove_client_records (void *cls, const struct GNUNET_HashCode * key, void *value)
453{
454 struct ClientList *client = cls;
455 struct ClientQueryRecord *record = value;
456
457 if (record->client != client)
458 return GNUNET_YES;
459 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
460 "Removing client %p's record for key %s\n", client,
461 GNUNET_h2s (key));
462 GNUNET_assert (GNUNET_YES ==
463 GNUNET_CONTAINER_multihashmap_remove (forward_map, key,
464 record));
465 if (NULL != record->hnode)
466 GNUNET_CONTAINER_heap_remove_node (record->hnode);
467 GNUNET_array_grow (record->seen_replies, record->seen_replies_count, 0);
468 GNUNET_free (record);
469 return GNUNET_YES;
470}
471
472
473/**
474 * Iterator over hash map entries that send a given reply to
475 * each of the matching clients. With some tricky recycling
476 * of the buffer.
477 *
478 * @param cls the 'struct ForwardReplyContext'
479 * @param key current key
480 * @param value value in the hash map, a ClientQueryRecord
481 * @return GNUNET_YES (we should continue to iterate),
482 * if the result is mal-formed, GNUNET_NO
483 */
484static int
485forward_reply (void *cls, const struct GNUNET_HashCode * key, void *value)
486{
487 struct ForwardReplyContext *frc = cls;
488 struct ClientQueryRecord *record = value;
489 struct PendingMessage *pm;
490 struct GNUNET_DHT_ClientResultMessage *reply;
491 enum GNUNET_BLOCK_EvaluationResult eval;
492 int do_free;
493 struct GNUNET_HashCode ch;
494 unsigned int i;
495
496 LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG,
497 "XVINE CLIENT-RESULT %s\n",
498 GNUNET_h2s_full (key));
499#if 0
500 if ((record->type != GNUNET_BLOCK_TYPE_ANY) && (record->type != frc->type))
501 {
502 LOG (GNUNET_ERROR_TYPE_DEBUG,
503 "Record type missmatch, not passing request for key %s to local client\n",
504 GNUNET_h2s (key));
505
506 GNUNET_STATISTICS_update (GDS_stats,
507 gettext_noop
508 ("# Key match, type mismatches in REPLY to CLIENT"),
509 1, GNUNET_NO);
510 return GNUNET_YES; /* type mismatch */
511 }
512#endif
513 GNUNET_CRYPTO_hash (frc->data, frc->data_size, &ch);
514 for (i = 0; i < record->seen_replies_count; i++)
515 if (0 == memcmp (&record->seen_replies[i], &ch, sizeof (struct GNUNET_HashCode)))
516 {
517 LOG (GNUNET_ERROR_TYPE_DEBUG,
518 "Duplicate reply, not passing request for key %s to local client\n",
519 GNUNET_h2s (key));
520 GNUNET_STATISTICS_update (GDS_stats,
521 gettext_noop
522 ("# Duplicate REPLIES to CLIENT request dropped"),
523 1, GNUNET_NO);
524 return GNUNET_YES; /* duplicate */
525 }
526 eval =
527 GNUNET_BLOCK_evaluate (GDS_block_context,
528 record->type,
529 GNUNET_BLOCK_EO_NONE,
530 key, NULL, 0,
531 record->xquery,
532 record->xquery_size,
533 frc->data,
534 frc->data_size);
535 LOG (GNUNET_ERROR_TYPE_DEBUG,
536 "Evaluation result is %d for key %s for local client's query\n",
537 (int) eval, GNUNET_h2s (key));
538 switch (eval)
539 {
540 case GNUNET_BLOCK_EVALUATION_OK_LAST:
541 do_free = GNUNET_YES;
542 break;
543 case GNUNET_BLOCK_EVALUATION_OK_MORE:
544 GNUNET_array_append (record->seen_replies, record->seen_replies_count, ch);
545 do_free = GNUNET_NO;
546 break;
547 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
548 /* should be impossible to encounter here */
549 GNUNET_break (0);
550 return GNUNET_YES;
551 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
552 GNUNET_break_op (0);
553 return GNUNET_NO;
554 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
555 GNUNET_break (0);
556 return GNUNET_NO;
557 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
558 GNUNET_break (0);
559 return GNUNET_NO;
560 case GNUNET_BLOCK_EVALUATION_RESULT_IRRELEVANT:
561 return GNUNET_YES;
562 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
563 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
564 _("Unsupported block type (%u) in request!\n"), record->type);
565 return GNUNET_NO;
566 default:
567 GNUNET_break (0);
568 return GNUNET_NO;
569 }
570 if (GNUNET_NO == frc->do_copy)
571 {
572 /* first time, we can use the original data */
573 pm = frc->pm;
574 frc->do_copy = GNUNET_YES;
575 }
576 else
577 {
578 /* two clients waiting for same reply, must copy for queueing */
579 pm = GNUNET_malloc (sizeof (struct PendingMessage) +
580 ntohs (frc->pm->msg->size));
581 GNUNET_memcpy (pm, frc->pm,
582 sizeof (struct PendingMessage) + ntohs (frc->pm->msg->size));
583 pm->next = pm->prev = NULL;
584 pm->msg = (struct GNUNET_MessageHeader *) &pm[1];
585 }
586 GNUNET_STATISTICS_update (GDS_stats,
587 gettext_noop ("# RESULTS queued for clients"), 1,
588 GNUNET_NO);
589 reply = (struct GNUNET_DHT_ClientResultMessage *) &pm[1];
590 reply->unique_id = record->unique_id;
591 LOG (GNUNET_ERROR_TYPE_DEBUG,
592 "Queueing reply to query %s for client %p\n",
593 GNUNET_h2s (key),
594 record->client->client_handle);
595 add_pending_message (record->client, pm);
596 if (GNUNET_YES == do_free)
597 remove_client_records (record->client, key, record);
598 return GNUNET_YES;
599}
600
601
602/**
603 * Handle a reply we've received from another peer. If the reply
604 * matches any of our pending queries, forward it to the respective
605 * client(s).
606 *
607 * @param expiration when will the reply expire
608 * @param key the query this reply is for
609 * @param get_path_length number of peers in @a get_path
610 * @param get_path path the reply took on get
611 * @param put_path_length number of peers in @a put_path
612 * @param put_path path the reply took on put
613 * @param type type of the reply
614 * @param data_size number of bytes in @a data
615 * @param data application payload data
616 */
617void
618GDS_CLIENTS_handle_reply (struct GNUNET_TIME_Absolute expiration,
619 const struct GNUNET_HashCode *key,
620 unsigned int get_path_length,
621 const struct GNUNET_PeerIdentity *get_path,
622 unsigned int put_path_length,
623 const struct GNUNET_PeerIdentity *put_path,
624 enum GNUNET_BLOCK_Type type, size_t data_size,
625 const void *data)
626{
627 struct ForwardReplyContext frc;
628 struct PendingMessage *pm;
629 struct GNUNET_DHT_ClientResultMessage *reply;
630 struct GNUNET_PeerIdentity *paths;
631 size_t msize;
632
633 LOG (GNUNET_ERROR_TYPE_DEBUG,
634 "reply for key %s\n",
635 GNUNET_h2s (key));
636
637 if (NULL == GNUNET_CONTAINER_multihashmap_get (forward_map, key))
638 {
639 GNUNET_STATISTICS_update (GDS_stats,
640 gettext_noop
641 ("# REPLIES ignored for CLIENTS (no match)"), 1,
642 GNUNET_NO);
643 return; /* no matching request, fast exit! */
644 }
645 msize =
646 sizeof (struct GNUNET_DHT_ClientResultMessage) + data_size +
647 (get_path_length + put_path_length) * sizeof (struct GNUNET_PeerIdentity);
648 if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
649 {
650 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
651 _("Could not pass reply to client, message too big!\n"));
652 return;
653 }
654 DEBUG ("reply FOR DATA_SIZE = %u\n",
655 (unsigned int) msize);
656 pm = GNUNET_malloc (msize + sizeof (struct PendingMessage));
657 reply = (struct GNUNET_DHT_ClientResultMessage *) &pm[1];
658 pm->msg = &reply->header;
659 reply->header.size = htons ((uint16_t) msize);
660 reply->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_RESULT);
661 reply->type = htonl (type);
662 reply->get_path_length = htonl (get_path_length);
663 reply->put_path_length = htonl (put_path_length);
664 reply->unique_id = 0; /* filled in later */
665 reply->expiration = GNUNET_TIME_absolute_hton (expiration);
666 reply->key = *key;
667 paths = (struct GNUNET_PeerIdentity *) &reply[1];
668 GNUNET_memcpy (paths,
669 put_path,
670 sizeof (struct GNUNET_PeerIdentity) * put_path_length);
671 GNUNET_memcpy (&paths[put_path_length],
672 get_path,
673 sizeof (struct GNUNET_PeerIdentity) * get_path_length);
674 GNUNET_memcpy (&paths[get_path_length + put_path_length],
675 data,
676 data_size);
677 frc.do_copy = GNUNET_NO;
678 frc.pm = pm;
679 frc.data = data;
680 frc.data_size = data_size;
681 frc.type = type;
682 GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
683 key,
684 &forward_reply,
685 &frc);
686 if (GNUNET_NO == frc.do_copy)
687 {
688 /* did not match any of the requests, free! */
689 GNUNET_STATISTICS_update (GDS_stats,
690 gettext_noop
691 ("# REPLIES ignored for CLIENTS (no match)"), 1,
692 GNUNET_NO);
693 GNUNET_free (pm);
694 }
695}
696
697/**
698 * Check if some client is monitoring GET messages and notify
699 * them in that case.
700 *
701 * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
702 * @param type The type of data in the request.
703 * @param hop_count Hop count so far.
704 * @param path_length number of entries in path (or 0 if not recorded).
705 * @param path peers on the GET path (or NULL if not recorded).
706 * @param desired_replication_level Desired replication level.
707 * @param key Key of the requested data.
708 */
709void
710GDS_CLIENTS_process_get (uint32_t options,
711 enum GNUNET_BLOCK_Type type,
712 uint32_t hop_count,
713 uint32_t desired_replication_level,
714 unsigned int path_length,
715 const struct GNUNET_PeerIdentity *path,
716 const struct GNUNET_HashCode * key)
717{
718 struct ClientMonitorRecord *m;
719 struct ClientList **cl;
720 unsigned int cl_size;
721
722 cl = NULL;
723 cl_size = 0;
724 for (m = monitor_head; NULL != m; m = m->next)
725 {
726 if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
727 (NULL == m->key ||
728 memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
729 {
730 struct PendingMessage *pm;
731 struct GNUNET_DHT_MonitorGetMessage *mmsg;
732 struct GNUNET_PeerIdentity *msg_path;
733 size_t msize;
734 unsigned int i;
735
736 /* Don't send duplicates */
737 for (i = 0; i < cl_size; i++)
738 if (cl[i] == m->client)
739 break;
740 if (i < cl_size)
741 continue;
742 GNUNET_array_append (cl, cl_size, m->client);
743
744 msize = path_length * sizeof (struct GNUNET_PeerIdentity);
745 msize += sizeof (struct GNUNET_DHT_MonitorGetMessage);
746 msize += sizeof (struct PendingMessage);
747 pm = GNUNET_malloc (msize);
748 mmsg = (struct GNUNET_DHT_MonitorGetMessage *) &pm[1];
749 pm->msg = &mmsg->header;
750 mmsg->header.size = htons (msize - sizeof (struct PendingMessage));
751 mmsg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET);
752 mmsg->options = htonl(options);
753 mmsg->type = htonl(type);
754 mmsg->hop_count = htonl(hop_count);
755 mmsg->desired_replication_level = htonl(desired_replication_level);
756 mmsg->get_path_length = htonl(path_length);
757 GNUNET_memcpy (&mmsg->key, key, sizeof (struct GNUNET_HashCode));
758 msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
759 if (path_length > 0)
760 GNUNET_memcpy (msg_path, path,
761 path_length * sizeof (struct GNUNET_PeerIdentity));
762 add_pending_message (m->client, pm);
763 }
764 }
765 GNUNET_free_non_null (cl);
766}
767
768
769/**
770 * Check if some client is monitoring PUT messages and notify
771 * them in that case.
772 *
773 * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
774 * @param type The type of data in the request.
775 * @param hop_count Hop count so far.
776 * @param path_length number of entries in path (or 0 if not recorded).
777 * @param path peers on the PUT path (or NULL if not recorded).
778 * @param desired_replication_level Desired replication level.
779 * @param exp Expiration time of the data.
780 * @param key Key under which data is to be stored.
781 * @param data Pointer to the data carried.
782 * @param size Number of bytes in data.
783 */
784void
785GDS_CLIENTS_process_put (uint32_t options,
786 enum GNUNET_BLOCK_Type type,
787 uint32_t hop_count,
788 uint32_t desired_replication_level,
789 unsigned int path_length,
790 const struct GNUNET_PeerIdentity *path,
791 struct GNUNET_TIME_Absolute exp,
792 const struct GNUNET_HashCode * key,
793 const void *data,
794 size_t size)
795{
796 struct ClientMonitorRecord *m;
797 struct ClientList **cl;
798 unsigned int cl_size;
799
800 cl = NULL;
801 cl_size = 0;
802 for (m = monitor_head; NULL != m; m = m->next)
803 {
804 if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
805 (NULL == m->key ||
806 memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
807 {
808 struct PendingMessage *pm;
809 struct GNUNET_DHT_MonitorPutMessage *mmsg;
810 struct GNUNET_PeerIdentity *msg_path;
811 size_t msize;
812 unsigned int i;
813
814 /* Don't send duplicates */
815 for (i = 0; i < cl_size; i++)
816 if (cl[i] == m->client)
817 break;
818 if (i < cl_size)
819 continue;
820 GNUNET_array_append (cl, cl_size, m->client);
821
822 msize = size;
823 msize += path_length * sizeof (struct GNUNET_PeerIdentity);
824 msize += sizeof (struct GNUNET_DHT_MonitorPutMessage);
825 msize += sizeof (struct PendingMessage);
826 pm = GNUNET_malloc (msize);
827 mmsg = (struct GNUNET_DHT_MonitorPutMessage *) &pm[1];
828 pm->msg = (struct GNUNET_MessageHeader *) mmsg;
829 mmsg->header.size = htons (msize - sizeof (struct PendingMessage));
830 mmsg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT);
831 mmsg->options = htonl(options);
832 mmsg->type = htonl(type);
833 mmsg->hop_count = htonl(hop_count);
834 mmsg->desired_replication_level = htonl(desired_replication_level);
835 mmsg->put_path_length = htonl(path_length);
836 msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
837 if (path_length > 0)
838 {
839 GNUNET_memcpy (msg_path, path,
840 path_length * sizeof (struct GNUNET_PeerIdentity));
841 }
842 mmsg->expiration_time = GNUNET_TIME_absolute_hton(exp);
843 GNUNET_memcpy (&mmsg->key, key, sizeof (struct GNUNET_HashCode));
844 if (size > 0)
845 GNUNET_memcpy (&msg_path[path_length], data, size);
846 add_pending_message (m->client, pm);
847 }
848 }
849 GNUNET_free_non_null (cl);
850}
851
852
853/**
854 * Route the given request via the DHT.
855 */
856static void
857transmit_request (struct ClientQueryRecord *cqr)
858{
859 GNUNET_STATISTICS_update (GDS_stats,
860 gettext_noop
861 ("# GET requests from clients injected"), 1,
862 GNUNET_NO);
863
864 LOG (GNUNET_ERROR_TYPE_DEBUG,
865 "Initiating GET for %s, replication %u, already have %u replies\n",
866 GNUNET_h2s (&cqr->key),
867 cqr->replication,
868 cqr->seen_replies_count);
869
870 GDS_NEIGHBOURS_handle_get (&cqr->key, cqr->type, cqr->msg_options,
871 cqr->replication);
872
873 /* exponential back-off for retries.
874 * max GNUNET_TIME_STD_EXPONENTIAL_BACKOFF_THRESHOLD (15 min) */
875 cqr->retry_frequency = GNUNET_TIME_STD_BACKOFF (cqr->retry_frequency);
876 cqr->retry_time = GNUNET_TIME_relative_to_absolute (cqr->retry_frequency);
877}
878
879
880/**
881 * Task that looks at the 'retry_heap' and transmits all of the requests
882 * on the heap that are ready for transmission. Then re-schedules
883 * itself (unless the heap is empty).
884 *
885 * @param cls unused
886 */
887static void
888transmit_next_request_task (void *cls)
889{
890 struct ClientQueryRecord *cqr;
891 struct GNUNET_TIME_Relative delay;
892
893 retry_task = NULL;
894 while (NULL != (cqr = GNUNET_CONTAINER_heap_remove_root (retry_heap)))
895 {
896 cqr->hnode = NULL;
897 delay = GNUNET_TIME_absolute_get_remaining (cqr->retry_time);
898 if (delay.rel_value_us > 0)
899 {
900 cqr->hnode =
901 GNUNET_CONTAINER_heap_insert (retry_heap, cqr,
902 cqr->retry_time.abs_value_us);
903 retry_task =
904 GNUNET_SCHEDULER_add_delayed (delay, &transmit_next_request_task,
905 NULL);
906 return;
907 }
908 transmit_request (cqr);
909 cqr->hnode =
910 GNUNET_CONTAINER_heap_insert (retry_heap, cqr,
911 cqr->retry_time.abs_value_us);
912 }
913}
914
915
916/**
917 * Handler for PUT messages.
918 *
919 * @param cls closure for the service
920 * @param client the client we received this message from
921 * @param message the actual message received
922 */
923static void
924handle_dht_local_put (void *cls, struct GNUNET_SERVER_Client *client,
925 const struct GNUNET_MessageHeader *message)
926{
927 const struct GNUNET_DHT_ClientPutMessage *put_msg;
928 struct PendingMessage *pm;
929 struct GNUNET_DHT_ClientPutConfirmationMessage *conf;
930 uint16_t size;
931
932 size = ntohs (message->size);
933 if (size < sizeof (struct GNUNET_DHT_ClientPutMessage))
934 {
935 GNUNET_break (0);
936 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
937 return;
938 }
939 GNUNET_STATISTICS_update (GDS_stats,
940 gettext_noop
941 ("# PUT requests received from clients"), 1,
942 GNUNET_NO);
943 put_msg = (const struct GNUNET_DHT_ClientPutMessage *) message;
944 LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG, "X-VINE DHT CLIENT-PUT %s\n",
945 GNUNET_h2s_full (&put_msg->key));
946 /* give to local clients */
947 LOG (GNUNET_ERROR_TYPE_DEBUG,
948 "Handling local PUT of %u-bytes for query %s\n",
949 size - sizeof (struct GNUNET_DHT_ClientPutMessage),
950 GNUNET_h2s (&put_msg->key));
951 DEBUG("PUT doing put i = %s\n",GNUNET_h2s(&(put_msg->key)));
952 GDS_CLIENTS_handle_reply (GNUNET_TIME_absolute_ntoh (put_msg->expiration),
953 &put_msg->key, 0, NULL, 0, NULL,
954 ntohl (put_msg->type),
955 size - sizeof (struct GNUNET_DHT_ClientPutMessage),
956 &put_msg[1]);
957
958 GDS_NEIGHBOURS_handle_put (&put_msg->key,
959 ntohl (put_msg->type), ntohl (put_msg->options),
960 ntohl (put_msg->desired_replication_level),
961 GNUNET_TIME_absolute_ntoh (put_msg->expiration),
962 &put_msg[1],
963 size - sizeof (struct GNUNET_DHT_ClientPutMessage));
964 pm = GNUNET_malloc (sizeof (struct PendingMessage) +
965 sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage));
966 conf = (struct GNUNET_DHT_ClientPutConfirmationMessage *) &pm[1];
967 conf->header.size = htons (sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage));
968 conf->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT_OK);
969 conf->reserved = htonl (0);
970 conf->unique_id = put_msg->unique_id;
971 pm->msg = &conf->header;
972 add_pending_message (find_active_client (client), pm);
973 GNUNET_SERVER_receive_done (client, GNUNET_OK);
974}
975
976
977/**
978 * Handler for DHT GET messages from the client.
979 *
980 * @param cls closure for the service
981 * @param client the client we received this message from
982 * @param message the actual message received
983 */
984static void
985handle_dht_local_get (void *cls, struct GNUNET_SERVER_Client *client,
986 const struct GNUNET_MessageHeader *message)
987{
988 const struct GNUNET_DHT_ClientGetMessage *get;
989 struct ClientQueryRecord *cqr;
990 size_t xquery_size;
991 const char *xquery;
992 uint16_t size;
993
994 size = ntohs (message->size);
995 if (size < sizeof (struct GNUNET_DHT_ClientGetMessage))
996 {
997 GNUNET_break (0);
998 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
999 return;
1000 }
1001 xquery_size = size - sizeof (struct GNUNET_DHT_ClientGetMessage);
1002 get = (const struct GNUNET_DHT_ClientGetMessage *) message;
1003 xquery = (const char *) &get[1];
1004 GNUNET_STATISTICS_update (GDS_stats,
1005 gettext_noop
1006 ("# GET requests received from clients"), 1,
1007 GNUNET_NO);
1008 LOG (GNUNET_ERROR_TYPE_DEBUG,
1009 "Received GET request for %s from local client %p, xq: %.*s\n",
1010 GNUNET_h2s (&get->key), client, xquery_size, xquery);
1011
1012 LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG, "X-VINE CLIENT-GET %s\n",
1013 GNUNET_h2s_full (&get->key));
1014
1015
1016 cqr = GNUNET_malloc (sizeof (struct ClientQueryRecord) + xquery_size);
1017 cqr->key = get->key;
1018 cqr->client = find_active_client (client);
1019 cqr->xquery = (void *) &cqr[1];
1020 GNUNET_memcpy (&cqr[1], xquery, xquery_size);
1021 cqr->hnode = GNUNET_CONTAINER_heap_insert (retry_heap, cqr, 0);
1022 cqr->retry_frequency = GNUNET_TIME_UNIT_SECONDS;
1023 cqr->retry_time = GNUNET_TIME_absolute_get ();
1024 cqr->unique_id = get->unique_id;
1025 cqr->xquery_size = xquery_size;
1026 cqr->replication = ntohl (get->desired_replication_level);
1027 cqr->msg_options = ntohl (get->options);
1028 cqr->type = ntohl (get->type);
1029
1030 // FIXME use cqr->key, set multihashmap create to GNUNET_YES
1031 GNUNET_CONTAINER_multihashmap_put (forward_map, &get->key, cqr,
1032 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
1033
1034 struct GNUNET_PeerIdentity my_identity;
1035 my_identity = GDS_NEIGHBOURS_get_my_id();
1036 GDS_CLIENTS_process_get (ntohl (get->options),
1037 ntohl (get->type),
1038 0,
1039 ntohl (get->desired_replication_level),
1040 1,
1041 &my_identity,
1042 &get->key);
1043 /* start remote requests */
1044 if (NULL != retry_task)
1045 GNUNET_SCHEDULER_cancel (retry_task);
1046 retry_task = GNUNET_SCHEDULER_add_now (&transmit_next_request_task, NULL);
1047 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1048}
1049
1050
1051/**
1052 * Closure for 'find_by_unique_id'.
1053 */
1054struct FindByUniqueIdContext
1055{
1056 /**
1057 * Where to store the result, if found.
1058 */
1059 struct ClientQueryRecord *cqr;
1060
1061 uint64_t unique_id;
1062};
1063
1064
1065/**
1066 * Function called for each existing DHT record for the given
1067 * query. Checks if it matches the UID given in the closure
1068 * and if so returns the entry as a result.
1069 *
1070 * @param cls the search context
1071 * @param key query for the lookup (not used)
1072 * @param value the 'struct ClientQueryRecord'
1073 * @return GNUNET_YES to continue iteration (result not yet found)
1074 */
1075static int
1076find_by_unique_id (void *cls,
1077 const struct GNUNET_HashCode *key,
1078 void *value)
1079{
1080 struct FindByUniqueIdContext *fui_ctx = cls;
1081 struct ClientQueryRecord *cqr = value;
1082
1083 if (cqr->unique_id != fui_ctx->unique_id)
1084 return GNUNET_YES;
1085 fui_ctx->cqr = cqr;
1086 return GNUNET_NO;
1087}
1088
1089
1090/**
1091 * Handler for "GET result seen" messages from the client.
1092 *
1093 * @param cls closure for the service
1094 * @param client the client we received this message from
1095 * @param message the actual message received
1096 */
1097static void
1098handle_dht_local_get_result_seen (void *cls, struct GNUNET_SERVER_Client *client,
1099 const struct GNUNET_MessageHeader *message)
1100{
1101 const struct GNUNET_DHT_ClientGetResultSeenMessage *seen;
1102 uint16_t size;
1103 unsigned int hash_count;
1104 unsigned int old_count;
1105 const struct GNUNET_HashCode *hc;
1106 struct FindByUniqueIdContext fui_ctx;
1107 struct ClientQueryRecord *cqr;
1108
1109 size = ntohs (message->size);
1110 if (size < sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage))
1111 {
1112 GNUNET_break (0);
1113 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1114 return;
1115 }
1116 seen = (const struct GNUNET_DHT_ClientGetResultSeenMessage *) message;
1117 hash_count = (size - sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage)) / sizeof (struct GNUNET_HashCode);
1118 if (size != sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage) + hash_count * sizeof (struct GNUNET_HashCode))
1119 {
1120 GNUNET_break (0);
1121 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1122 return;
1123 }
1124 hc = (const struct GNUNET_HashCode*) &seen[1];
1125 fui_ctx.unique_id = seen->unique_id;
1126 fui_ctx.cqr = NULL;
1127 GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
1128 &seen->key,
1129 &find_by_unique_id,
1130 &fui_ctx);
1131 if (NULL == (cqr = fui_ctx.cqr))
1132 {
1133 GNUNET_break (0);
1134 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1135 return;
1136 }
1137 /* finally, update 'seen' list */
1138 old_count = cqr->seen_replies_count;
1139 GNUNET_array_grow (cqr->seen_replies,
1140 cqr->seen_replies_count,
1141 cqr->seen_replies_count + hash_count);
1142 GNUNET_memcpy (&cqr->seen_replies[old_count],
1143 hc,
1144 sizeof (struct GNUNET_HashCode) * hash_count);
1145}
1146
1147
1148/**
1149 * Closure for 'remove_by_unique_id'.
1150 */
1151struct RemoveByUniqueIdContext
1152{
1153 /**
1154 * Client that issued the removal request.
1155 */
1156 struct ClientList *client;
1157
1158 /**
1159 * Unique ID of the request.
1160 */
1161 uint64_t unique_id;
1162};
1163
1164
1165/**
1166 * Iterator over hash map entries that frees all entries
1167 * that match the given client and unique ID.
1168 *
1169 * @param cls unique ID and client to search for in source routes
1170 * @param key current key code
1171 * @param value value in the hash map, a ClientQueryRecord
1172 * @return GNUNET_YES (we should continue to iterate)
1173 */
1174static int
1175remove_by_unique_id (void *cls, const struct GNUNET_HashCode * key, void *value)
1176{
1177 const struct RemoveByUniqueIdContext *ctx = cls;
1178 struct ClientQueryRecord *record = value;
1179
1180 if (record->unique_id != ctx->unique_id)
1181 return GNUNET_YES;
1182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1183 "Removing client %p's record for key %s (by unique id)\n",
1184 ctx->client->client_handle, GNUNET_h2s (key));
1185 return remove_client_records (ctx->client, key, record);
1186}
1187
1188
1189/**
1190 * Handler for any generic DHT stop messages, calls the appropriate handler
1191 * depending on message type (if processed locally)
1192 *
1193 * @param cls closure for the service
1194 * @param client the client we received this message from
1195 * @param message the actual message received
1196 *
1197 */
1198static void
1199handle_dht_local_get_stop (void *cls, struct GNUNET_SERVER_Client *client,
1200 const struct GNUNET_MessageHeader *message)
1201{
1202 const struct GNUNET_DHT_ClientGetStopMessage *dht_stop_msg =
1203 (const struct GNUNET_DHT_ClientGetStopMessage *) message;
1204 struct RemoveByUniqueIdContext ctx;
1205
1206 GNUNET_STATISTICS_update (GDS_stats,
1207 gettext_noop
1208 ("# GET STOP requests received from clients"), 1,
1209 GNUNET_NO);
1210 LOG (GNUNET_ERROR_TYPE_DEBUG,
1211 "Received GET STOP request for %s from local client %p\n",
1212 GNUNET_h2s (&dht_stop_msg->key),
1213 client);
1214 ctx.client = find_active_client (client);
1215 ctx.unique_id = dht_stop_msg->unique_id;
1216 GNUNET_CONTAINER_multihashmap_get_multiple (forward_map, &dht_stop_msg->key,
1217 &remove_by_unique_id, &ctx);
1218 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1219}
1220
1221
1222/**
1223 * Handler for monitor start messages
1224 *
1225 * @param cls closure for the service
1226 * @param client the client we received this message from
1227 * @param message the actual message received
1228 *
1229 */
1230static void
1231handle_dht_local_monitor (void *cls, struct GNUNET_SERVER_Client *client,
1232 const struct GNUNET_MessageHeader *message)
1233{
1234 struct ClientMonitorRecord *r;
1235 const struct GNUNET_DHT_MonitorStartStopMessage *msg;
1236
1237 msg = (struct GNUNET_DHT_MonitorStartStopMessage *) message;
1238 r = GNUNET_new (struct ClientMonitorRecord);
1239
1240 r->client = find_active_client(client);
1241 r->type = ntohl(msg->type);
1242 r->get = ntohs(msg->get);
1243 r->get_resp = ntohs(msg->get_resp);
1244 r->put = ntohs(msg->put);
1245 if (0 == ntohs(msg->filter_key))
1246 r->key = NULL;
1247 else
1248 {
1249 r->key = GNUNET_new (struct GNUNET_HashCode);
1250 GNUNET_memcpy (r->key, &msg->key, sizeof (struct GNUNET_HashCode));
1251 }
1252 GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, r);
1253 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1254}
1255
1256
1257/**
1258 * Handler for monitor stop messages
1259 *
1260 * @param cls closure for the service
1261 * @param client the client we received this message from
1262 * @param message the actual message received
1263 *
1264 */
1265static void
1266handle_dht_local_monitor_stop (void *cls, struct GNUNET_SERVER_Client *client,
1267 const struct GNUNET_MessageHeader *message)
1268{
1269 struct ClientMonitorRecord *r;
1270 const struct GNUNET_DHT_MonitorStartStopMessage *msg;
1271 int keys_match;
1272
1273 msg = (struct GNUNET_DHT_MonitorStartStopMessage *) message;
1274 r = monitor_head;
1275
1276 while (NULL != r)
1277 {
1278 if (NULL == r->key)
1279 keys_match = (0 == ntohs(msg->filter_key));
1280 else
1281 {
1282 keys_match = (0 != ntohs(msg->filter_key)
1283 && !memcmp(r->key, &msg->key, sizeof(struct GNUNET_HashCode)));
1284 }
1285 if (find_active_client(client) == r->client
1286 && ntohl(msg->type) == r->type
1287 && r->get == msg->get
1288 && r->get_resp == msg->get_resp
1289 && r->put == msg->put
1290 && keys_match
1291 )
1292 {
1293 GNUNET_CONTAINER_DLL_remove (monitor_head, monitor_tail, r);
1294 GNUNET_free_non_null (r->key);
1295 GNUNET_free (r);
1296 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1297 return; /* Delete only ONE entry */
1298 }
1299 r = r->next;
1300 }
1301
1302 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1303}
1304
1305
1306/**
1307 * Functions with this signature are called whenever a client
1308 * is disconnected on the network level.
1309 *
1310 * @param cls closure (NULL for dht)
1311 * @param client identification of the client; NULL
1312 * for the last call when the server is destroyed
1313 */
1314static void
1315handle_client_disconnect (void *cls,
1316 struct GNUNET_SERVER_Client *client)
1317{
1318 struct ClientList *pos;
1319 struct PendingMessage *reply;
1320 struct ClientMonitorRecord *monitor;
1321
1322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1323 "Local client %p disconnects\n",
1324 client);
1325 pos = find_active_client (client);
1326 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, pos);
1327 if (pos->transmit_handle != NULL)
1328 GNUNET_SERVER_notify_transmit_ready_cancel (pos->transmit_handle);
1329 while (NULL != (reply = pos->pending_head))
1330 {
1331 GNUNET_CONTAINER_DLL_remove (pos->pending_head, pos->pending_tail, reply);
1332 GNUNET_free (reply);
1333 }
1334 monitor = monitor_head;
1335 while (NULL != monitor)
1336 {
1337 if (monitor->client == pos)
1338 {
1339 struct ClientMonitorRecord *next;
1340
1341 GNUNET_free_non_null (monitor->key);
1342 next = monitor->next;
1343 GNUNET_CONTAINER_DLL_remove (monitor_head, monitor_tail, monitor);
1344 GNUNET_free (monitor);
1345 monitor = next;
1346 }
1347 else
1348 monitor = monitor->next;
1349 }
1350 GNUNET_CONTAINER_multihashmap_iterate (forward_map, &remove_client_records,
1351 pos);
1352 GNUNET_free (pos);
1353}
1354
1355
1356
1357/**
1358 * Initialize client subsystem.
1359 *
1360 * @param server the initialized server
1361 */
1362void
1363GDS_CLIENTS_init (struct GNUNET_SERVER_Handle *server)
1364{
1365 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1366 {&handle_dht_local_put, NULL,
1367 GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT, 0},
1368 {&handle_dht_local_get, NULL,
1369 GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET, 0},
1370 {&handle_dht_local_get_stop, NULL,
1371 GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_STOP,
1372 sizeof (struct GNUNET_DHT_ClientGetStopMessage)},
1373 {&handle_dht_local_monitor, NULL,
1374 GNUNET_MESSAGE_TYPE_DHT_MONITOR_START,
1375 sizeof (struct GNUNET_DHT_MonitorStartStopMessage)},
1376 {&handle_dht_local_monitor_stop, NULL,
1377 GNUNET_MESSAGE_TYPE_DHT_MONITOR_STOP,
1378 sizeof (struct GNUNET_DHT_MonitorStartStopMessage)},
1379 {&handle_dht_local_get_result_seen, NULL,
1380 GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_RESULTS_KNOWN, 0},
1381 {NULL, NULL, 0, 0}
1382 };
1383 forward_map = GNUNET_CONTAINER_multihashmap_create (1024, GNUNET_NO);
1384 retry_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
1385 GNUNET_SERVER_add_handlers (server, plugin_handlers);
1386 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
1387}
1388
1389
1390/**
1391 * Shutdown client subsystem.
1392 */
1393void
1394GDS_CLIENTS_done ()
1395{
1396 GNUNET_assert (client_head == NULL);
1397 GNUNET_assert (client_tail == NULL);
1398 if (NULL != retry_task)
1399 {
1400 GNUNET_SCHEDULER_cancel (retry_task);
1401 retry_task = NULL;
1402 }
1403 if (NULL != retry_heap)
1404 {
1405 GNUNET_assert (0 == GNUNET_CONTAINER_heap_get_size (retry_heap));
1406 GNUNET_CONTAINER_heap_destroy (retry_heap);
1407 retry_heap = NULL;
1408 }
1409 if (NULL != forward_map)
1410 {
1411 GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size (forward_map));
1412 GNUNET_CONTAINER_multihashmap_destroy (forward_map);
1413 forward_map = NULL;
1414 }
1415}
1416
1417/* end of gnunet-service-dht_clients.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 18:23:45 +0000