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diff --git a/src/dht/gnunet-service-wdht_clients.c b/src/dht/gnunet-service-wdht_clients.c
deleted file mode 100644
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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-wdht_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-wdht.h"
33#include "gnunet-service-wdht_clients.h"
34#include "gnunet-service-dht_datacache.h"
35#include "gnunet-service-wdht_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 @e 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 @e 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,
486 const struct GNUNET_HashCode *key,
487 void *value)
488{
489 struct ForwardReplyContext *frc = cls;
490 struct ClientQueryRecord *record = value;
491 struct PendingMessage *pm;
492 struct GNUNET_DHT_ClientResultMessage *reply;
493 enum GNUNET_BLOCK_EvaluationResult eval;
494 int do_free;
495 struct GNUNET_HashCode ch;
496 unsigned int i;
497
498 LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG,
499 "XVINE CLIENT-RESULT %s\n",
500 GNUNET_h2s_full (key));
501#if 0
502 if ((record->type != GNUNET_BLOCK_TYPE_ANY) && (record->type != frc->type))
503 {
504 LOG (GNUNET_ERROR_TYPE_DEBUG,
505 "Record type missmatch, not passing request for key %s to local client\n",
506 GNUNET_h2s (key));
507
508 GNUNET_STATISTICS_update (GDS_stats,
509 gettext_noop
510 ("# Key match, type mismatches in REPLY to CLIENT"),
511 1, GNUNET_NO);
512 return GNUNET_YES; /* type mismatch */
513 }
514#endif
515 GNUNET_CRYPTO_hash (frc->data, frc->data_size, &ch);
516 for (i = 0; i < record->seen_replies_count; i++)
517 if (0 == memcmp (&record->seen_replies[i], &ch, sizeof (struct GNUNET_HashCode)))
518 {
519 LOG (GNUNET_ERROR_TYPE_DEBUG,
520 "Duplicate reply, not passing request for key %s to local client\n",
521 GNUNET_h2s (key));
522 GNUNET_STATISTICS_update (GDS_stats,
523 gettext_noop
524 ("# Duplicate REPLIES to CLIENT request dropped"),
525 1, GNUNET_NO);
526 return GNUNET_YES; /* duplicate */
527 }
528 eval =
529 GNUNET_BLOCK_evaluate (GDS_block_context,
530 record->type,
531 GNUNET_BLOCK_EO_NONE,
532 key, NULL, 0,
533 record->xquery,
534 record->xquery_size,
535 frc->data,
536 frc->data_size);
537 LOG (GNUNET_ERROR_TYPE_DEBUG,
538 "Evaluation result is %d for key %s for local client's query\n",
539 (int) eval, GNUNET_h2s (key));
540 switch (eval)
541 {
542 case GNUNET_BLOCK_EVALUATION_OK_LAST:
543 do_free = GNUNET_YES;
544 break;
545 case GNUNET_BLOCK_EVALUATION_OK_MORE:
546 GNUNET_array_append (record->seen_replies, record->seen_replies_count, ch);
547 do_free = GNUNET_NO;
548 break;
549 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
550 /* should be impossible to encounter here */
551 GNUNET_break (0);
552 return GNUNET_YES;
553 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
554 GNUNET_break_op (0);
555 return GNUNET_NO;
556 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
557 GNUNET_break (0);
558 return GNUNET_NO;
559 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
560 GNUNET_break (0);
561 return GNUNET_NO;
562 case GNUNET_BLOCK_EVALUATION_RESULT_IRRELEVANT:
563 return GNUNET_YES;
564 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
565 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
566 _("Unsupported block type (%u) in request!\n"), record->type);
567 return GNUNET_NO;
568 default:
569 GNUNET_break (0);
570 return GNUNET_NO;
571 }
572 if (GNUNET_NO == frc->do_copy)
573 {
574 /* first time, we can use the original data */
575 pm = frc->pm;
576 frc->do_copy = GNUNET_YES;
577 }
578 else
579 {
580 /* two clients waiting for same reply, must copy for queueing */
581 pm = GNUNET_malloc (sizeof (struct PendingMessage) +
582 ntohs (frc->pm->msg->size));
583 GNUNET_memcpy (pm, frc->pm,
584 sizeof (struct PendingMessage) + ntohs (frc->pm->msg->size));
585 pm->next = pm->prev = NULL;
586 pm->msg = (struct GNUNET_MessageHeader *) &pm[1];
587 }
588 GNUNET_STATISTICS_update (GDS_stats,
589 gettext_noop ("# RESULTS queued for clients"), 1,
590 GNUNET_NO);
591 reply = (struct GNUNET_DHT_ClientResultMessage *) &pm[1];
592 reply->unique_id = record->unique_id;
593 LOG (GNUNET_ERROR_TYPE_DEBUG,
594 "Queueing reply to query %s for client %p\n",
595 GNUNET_h2s (key),
596 record->client->client_handle);
597 add_pending_message (record->client, pm);
598 if (GNUNET_YES == do_free)
599 remove_client_records (record->client, key, record);
600 return GNUNET_YES;
601}
602
603
604/**
605 * Handle a reply we've received from another peer. If the reply
606 * matches any of our pending queries, forward it to the respective
607 * client(s).
608 *
609 * @param expiration when will the reply expire
610 * @param key the query this reply is for
611 * @param get_path_length number of peers in @a get_path
612 * @param get_path path the reply took on get
613 * @param put_path_length number of peers in @a put_path
614 * @param put_path path the reply took on put
615 * @param type type of the reply
616 * @param data_size number of bytes in @a data
617 * @param data application payload data
618 */
619void
620GDS_CLIENTS_handle_reply (struct GNUNET_TIME_Absolute expiration,
621 const struct GNUNET_HashCode *key,
622 unsigned int get_path_length,
623 const struct GNUNET_PeerIdentity *get_path,
624 unsigned int put_path_length,
625 const struct GNUNET_PeerIdentity *put_path,
626 enum GNUNET_BLOCK_Type type, size_t data_size,
627 const void *data)
628{
629 struct ForwardReplyContext frc;
630 struct PendingMessage *pm;
631 struct GNUNET_DHT_ClientResultMessage *reply;
632 struct GNUNET_PeerIdentity *paths;
633 size_t msize;
634
635 LOG (GNUNET_ERROR_TYPE_DEBUG,
636 "reply for key %s\n",
637 GNUNET_h2s (key));
638
639 if (NULL == GNUNET_CONTAINER_multihashmap_get (forward_map, key))
640 {
641 GNUNET_STATISTICS_update (GDS_stats,
642 gettext_noop
643 ("# REPLIES ignored for CLIENTS (no match)"), 1,
644 GNUNET_NO);
645 return; /* no matching request, fast exit! */
646 }
647 msize =
648 sizeof (struct GNUNET_DHT_ClientResultMessage) + data_size +
649 (get_path_length + put_path_length) * sizeof (struct GNUNET_PeerIdentity);
650 if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
651 {
652 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
653 _("Could not pass reply to client, message too big!\n"));
654 return;
655 }
656 DEBUG ("reply FOR DATA_SIZE = %u\n",
657 (unsigned int) msize);
658 pm = GNUNET_malloc (msize + sizeof (struct PendingMessage));
659 reply = (struct GNUNET_DHT_ClientResultMessage *) &pm[1];
660 pm->msg = &reply->header;
661 reply->header.size = htons ((uint16_t) msize);
662 reply->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_RESULT);
663 reply->type = htonl (type);
664 reply->get_path_length = htonl (get_path_length);
665 reply->put_path_length = htonl (put_path_length);
666 reply->unique_id = 0; /* filled in later */
667 reply->expiration = GNUNET_TIME_absolute_hton (expiration);
668 reply->key = *key;
669 paths = (struct GNUNET_PeerIdentity *) &reply[1];
670 GNUNET_memcpy (paths,
671 put_path,
672 sizeof (struct GNUNET_PeerIdentity) * put_path_length);
673 GNUNET_memcpy (&paths[put_path_length],
674 get_path,
675 sizeof (struct GNUNET_PeerIdentity) * get_path_length);
676 GNUNET_memcpy (&paths[get_path_length + put_path_length],
677 data,
678 data_size);
679 frc.do_copy = GNUNET_NO;
680 frc.pm = pm;
681 frc.data = data;
682 frc.data_size = data_size;
683 frc.type = type;
684 GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
685 key,
686 &forward_reply,
687 &frc);
688 if (GNUNET_NO == frc.do_copy)
689 {
690 /* did not match any of the requests, free! */
691 GNUNET_STATISTICS_update (GDS_stats,
692 gettext_noop
693 ("# REPLIES ignored for CLIENTS (no match)"), 1,
694 GNUNET_NO);
695 GNUNET_free (pm);
696 }
697}
698
699
700/**
701 * Check if some client is monitoring GET messages and notify
702 * them in that case.
703 *
704 * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
705 * @param type The type of data in the request.
706 * @param hop_count Hop count so far.
707 * @param path_length number of entries in path (or 0 if not recorded).
708 * @param path peers on the GET path (or NULL if not recorded).
709 * @param desired_replication_level Desired replication level.
710 * @param key Key of the requested data.
711 */
712void
713GDS_CLIENTS_process_get (uint32_t options,
714 enum GNUNET_BLOCK_Type type,
715 uint32_t hop_count,
716 uint32_t desired_replication_level,
717 unsigned int path_length,
718 const struct GNUNET_PeerIdentity *path,
719 const struct GNUNET_HashCode *key)
720{
721 struct ClientMonitorRecord *m;
722 struct ClientList **cl;
723 unsigned int cl_size;
724
725 cl = NULL;
726 cl_size = 0;
727 for (m = monitor_head; NULL != m; m = m->next)
728 {
729 if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
730 (NULL == m->key ||
731 memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
732 {
733 struct PendingMessage *pm;
734 struct GNUNET_DHT_MonitorGetMessage *mmsg;
735 struct GNUNET_PeerIdentity *msg_path;
736 size_t msize;
737 unsigned int i;
738
739 /* Don't send duplicates */
740 for (i = 0; i < cl_size; i++)
741 if (cl[i] == m->client)
742 break;
743 if (i < cl_size)
744 continue;
745 GNUNET_array_append (cl, cl_size, m->client);
746
747 msize = path_length * sizeof (struct GNUNET_PeerIdentity);
748 msize += sizeof (struct GNUNET_DHT_MonitorGetMessage);
749 msize += sizeof (struct PendingMessage);
750 pm = GNUNET_malloc (msize);
751 mmsg = (struct GNUNET_DHT_MonitorGetMessage *) &pm[1];
752 pm->msg = &mmsg->header;
753 mmsg->header.size = htons (msize - sizeof (struct PendingMessage));
754 mmsg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET);
755 mmsg->options = htonl(options);
756 mmsg->type = htonl(type);
757 mmsg->hop_count = htonl(hop_count);
758 mmsg->desired_replication_level = htonl(desired_replication_level);
759 mmsg->get_path_length = htonl(path_length);
760 GNUNET_memcpy (&mmsg->key, key, sizeof (struct GNUNET_HashCode));
761 msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
762 if (path_length > 0)
763 GNUNET_memcpy (msg_path, path,
764 path_length * sizeof (struct GNUNET_PeerIdentity));
765 add_pending_message (m->client, pm);
766 }
767 }
768 GNUNET_free_non_null (cl);
769}
770
771
772/**
773 * Check if some client is monitoring PUT messages and notify
774 * them in that case.
775 *
776 * @param options options, for instance RecordRoute, DemultiplexEverywhere.
777 * @param type type of data in the request.
778 * @param hop_count hop count so far.
779 * @param path_length number of entries in @a path (or 0 if not recorded).
780 * @param path peers on the PUT path (or NULL if not recorded).
781 * @param desired_replication_level desired replication level.
782 * @param exp expiration time of the data.
783 * @param key key under which @a data is to be stored.
784 * @param data pointer to the data carried.
785 * @param size number of bytes in @a data.
786 */
787void
788GDS_CLIENTS_process_put (uint32_t options,
789 enum GNUNET_BLOCK_Type type,
790 uint32_t hop_count,
791 uint32_t desired_replication_level,
792 unsigned int path_length,
793 const struct GNUNET_PeerIdentity *path,
794 struct GNUNET_TIME_Absolute exp,
795 const struct GNUNET_HashCode *key,
796 const void *data,
797 size_t size)
798{
799 struct ClientMonitorRecord *m;
800 struct ClientList **cl;
801 unsigned int cl_size;
802
803 cl = NULL;
804 cl_size = 0;
805 for (m = monitor_head; NULL != m; m = m->next)
806 {
807 if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
808 (NULL == m->key ||
809 memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
810 {
811 struct PendingMessage *pm;
812 struct GNUNET_DHT_MonitorPutMessage *mmsg;
813 struct GNUNET_PeerIdentity *msg_path;
814 size_t msize;
815 unsigned int i;
816
817 /* Don't send duplicates */
818 for (i = 0; i < cl_size; i++)
819 if (cl[i] == m->client)
820 break;
821 if (i < cl_size)
822 continue;
823 GNUNET_array_append (cl, cl_size, m->client);
824
825 msize = size;
826 msize += path_length * sizeof (struct GNUNET_PeerIdentity);
827 msize += sizeof (struct GNUNET_DHT_MonitorPutMessage);
828 msize += sizeof (struct PendingMessage);
829 pm = GNUNET_malloc (msize);
830 mmsg = (struct GNUNET_DHT_MonitorPutMessage *) &pm[1];
831 pm->msg = (struct GNUNET_MessageHeader *) mmsg;
832 mmsg->header.size = htons (msize - sizeof (struct PendingMessage));
833 mmsg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT);
834 mmsg->options = htonl(options);
835 mmsg->type = htonl(type);
836 mmsg->hop_count = htonl(hop_count);
837 mmsg->desired_replication_level = htonl(desired_replication_level);
838 mmsg->put_path_length = htonl(path_length);
839 msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
840 if (path_length > 0)
841 {
842 GNUNET_memcpy (msg_path, path,
843 path_length * sizeof (struct GNUNET_PeerIdentity));
844 }
845 mmsg->expiration_time = GNUNET_TIME_absolute_hton(exp);
846 GNUNET_memcpy (&mmsg->key, key, sizeof (struct GNUNET_HashCode));
847 if (size > 0)
848 GNUNET_memcpy (&msg_path[path_length], data, size);
849 add_pending_message (m->client, pm);
850 }
851 }
852 GNUNET_free_non_null (cl);
853}
854
855
856/**
857 * Route the given request via the DHT.
858 */
859static void
860transmit_request (struct ClientQueryRecord *cqr)
861{
862 GNUNET_STATISTICS_update (GDS_stats,
863 gettext_noop
864 ("# GET requests from clients injected"), 1,
865 GNUNET_NO);
866
867 LOG (GNUNET_ERROR_TYPE_DEBUG,
868 "Initiating GET for %s, replication %u, already have %u replies\n",
869 GNUNET_h2s (&cqr->key),
870 cqr->replication,
871 cqr->seen_replies_count);
872
873 GDS_NEIGHBOURS_handle_get (&cqr->key, cqr->type, cqr->msg_options,
874 cqr->replication);
875
876 /* exponential back-off for retries.
877 * max GNUNET_TIME_STD_EXPONENTIAL_BACKOFF_THRESHOLD (15 min) */
878 cqr->retry_frequency = GNUNET_TIME_STD_BACKOFF (cqr->retry_frequency);
879 cqr->retry_time = GNUNET_TIME_relative_to_absolute (cqr->retry_frequency);
880}
881
882
883/**
884 * Task that looks at the 'retry_heap' and transmits all of the requests
885 * on the heap that are ready for transmission. Then re-schedules
886 * itself (unless the heap is empty).
887 *
888 * @param cls unused
889 */
890static void
891transmit_next_request_task (void *cls)
892{
893 struct ClientQueryRecord *cqr;
894 struct GNUNET_TIME_Relative delay;
895
896 retry_task = NULL;
897 while (NULL != (cqr = GNUNET_CONTAINER_heap_remove_root (retry_heap)))
898 {
899 cqr->hnode = NULL;
900 delay = GNUNET_TIME_absolute_get_remaining (cqr->retry_time);
901 if (delay.rel_value_us > 0)
902 {
903 cqr->hnode =
904 GNUNET_CONTAINER_heap_insert (retry_heap, cqr,
905 cqr->retry_time.abs_value_us);
906 retry_task =
907 GNUNET_SCHEDULER_add_delayed (delay, &transmit_next_request_task,
908 NULL);
909 return;
910 }
911 transmit_request (cqr);
912 cqr->hnode =
913 GNUNET_CONTAINER_heap_insert (retry_heap, cqr,
914 cqr->retry_time.abs_value_us);
915 }
916}
917
918
919/**
920 * Handler for PUT messages.
921 *
922 * @param cls closure for the service
923 * @param client the client we received this message from
924 * @param message the actual message received
925 */
926static void
927handle_dht_local_put (void *cls,
928 struct GNUNET_SERVER_Client *client,
929 const struct GNUNET_MessageHeader *message)
930{
931 const struct GNUNET_DHT_ClientPutMessage *put_msg;
932 struct PendingMessage *pm;
933 struct GNUNET_DHT_ClientPutConfirmationMessage *conf;
934 uint16_t size;
935
936 size = ntohs (message->size);
937 if (size < sizeof (struct GNUNET_DHT_ClientPutMessage))
938 {
939 GNUNET_break (0);
940 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
941 return;
942 }
943 GNUNET_STATISTICS_update (GDS_stats,
944 gettext_noop
945 ("# PUT requests received from clients"), 1,
946 GNUNET_NO);
947 put_msg = (const struct GNUNET_DHT_ClientPutMessage *) message;
948 LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG, "X-VINE DHT CLIENT-PUT %s\n",
949 GNUNET_h2s_full (&put_msg->key));
950 /* give to local clients */
951 LOG (GNUNET_ERROR_TYPE_DEBUG,
952 "Handling local PUT of %u-bytes for query %s\n",
953 size - sizeof (struct GNUNET_DHT_ClientPutMessage),
954 GNUNET_h2s (&put_msg->key));
955 DEBUG("PUT doing put i = %s\n",GNUNET_h2s(&(put_msg->key)));
956 GDS_CLIENTS_handle_reply (GNUNET_TIME_absolute_ntoh (put_msg->expiration),
957 &put_msg->key, 0, NULL, 0, NULL,
958 ntohl (put_msg->type),
959 size - sizeof (struct GNUNET_DHT_ClientPutMessage),
960 &put_msg[1]);
961
962 GDS_NEIGHBOURS_handle_put (&put_msg->key,
963 ntohl (put_msg->type), ntohl (put_msg->options),
964 ntohl (put_msg->desired_replication_level),
965 GNUNET_TIME_absolute_ntoh (put_msg->expiration),
966 &put_msg[1],
967 size - sizeof (struct GNUNET_DHT_ClientPutMessage));
968 pm = GNUNET_malloc (sizeof (struct PendingMessage) +
969 sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage));
970 conf = (struct GNUNET_DHT_ClientPutConfirmationMessage *) &pm[1];
971 conf->header.size = htons (sizeof (struct GNUNET_DHT_ClientPutConfirmationMessage));
972 conf->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT_OK);
973 conf->reserved = htonl (0);
974 conf->unique_id = put_msg->unique_id;
975 pm->msg = &conf->header;
976 add_pending_message (find_active_client (client), pm);
977 GNUNET_SERVER_receive_done (client, GNUNET_OK);
978}
979
980
981/**
982 * Handler for DHT GET messages from the client.
983 *
984 * @param cls closure for the service
985 * @param client the client we received this message from
986 * @param message the actual message received
987 */
988static void
989handle_dht_local_get (void *cls,
990 struct GNUNET_SERVER_Client *client,
991 const struct GNUNET_MessageHeader *message)
992{
993 const struct GNUNET_DHT_ClientGetMessage *get;
994 struct ClientQueryRecord *cqr;
995 size_t xquery_size;
996 const char *xquery;
997 uint16_t size;
998
999 size = ntohs (message->size);
1000 if (size < sizeof (struct GNUNET_DHT_ClientGetMessage))
1001 {
1002 GNUNET_break (0);
1003 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1004 return;
1005 }
1006 xquery_size = size - sizeof (struct GNUNET_DHT_ClientGetMessage);
1007 get = (const struct GNUNET_DHT_ClientGetMessage *) message;
1008 xquery = (const char *) &get[1];
1009 GNUNET_STATISTICS_update (GDS_stats,
1010 gettext_noop
1011 ("# GET requests received from clients"), 1,
1012 GNUNET_NO);
1013 LOG (GNUNET_ERROR_TYPE_DEBUG,
1014 "Received GET request for %s from local client %p, xq: %.*s\n",
1015 GNUNET_h2s (&get->key), client, xquery_size, xquery);
1016
1017 LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG, "X-VINE CLIENT-GET %s\n",
1018 GNUNET_h2s_full (&get->key));
1019
1020
1021 cqr = GNUNET_malloc (sizeof (struct ClientQueryRecord) + xquery_size);
1022 cqr->key = get->key;
1023 cqr->client = find_active_client (client);
1024 cqr->xquery = (void *) &cqr[1];
1025 GNUNET_memcpy (&cqr[1], xquery, xquery_size);
1026 cqr->hnode = GNUNET_CONTAINER_heap_insert (retry_heap, cqr, 0);
1027 cqr->retry_frequency = GNUNET_TIME_UNIT_SECONDS;
1028 cqr->retry_time = GNUNET_TIME_absolute_get ();
1029 cqr->unique_id = get->unique_id;
1030 cqr->xquery_size = xquery_size;
1031 cqr->replication = ntohl (get->desired_replication_level);
1032 cqr->msg_options = ntohl (get->options);
1033 cqr->type = ntohl (get->type);
1034
1035 // FIXME use cqr->key, set multihashmap create to GNUNET_YES
1036 GNUNET_CONTAINER_multihashmap_put (forward_map, &get->key, cqr,
1037 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
1038
1039 struct GNUNET_PeerIdentity my_identity;
1040 my_identity = GDS_NEIGHBOURS_get_my_id();
1041 GDS_CLIENTS_process_get (ntohl (get->options),
1042 ntohl (get->type),
1043 0,
1044 ntohl (get->desired_replication_level),
1045 1,
1046 &my_identity,
1047 &get->key);
1048 /* start remote requests */
1049 if (NULL != retry_task)
1050 GNUNET_SCHEDULER_cancel (retry_task);
1051 retry_task = GNUNET_SCHEDULER_add_now (&transmit_next_request_task, NULL);
1052 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1053}
1054
1055
1056/**
1057 * Closure for #find_by_unique_id().
1058 */
1059struct FindByUniqueIdContext
1060{
1061 /**
1062 * Where to store the result, if found.
1063 */
1064 struct ClientQueryRecord *cqr;
1065
1066 /**
1067 * Which ID are we looking for?
1068 */
1069 uint64_t unique_id;
1070};
1071
1072
1073/**
1074 * Function called for each existing DHT record for the given
1075 * query. Checks if it matches the UID given in the closure
1076 * and if so returns the entry as a result.
1077 *
1078 * @param cls the search context
1079 * @param key query for the lookup (not used)
1080 * @param value the `struct ClientQueryRecord`
1081 * @return #GNUNET_YES to continue iteration (result not yet found)
1082 */
1083static int
1084find_by_unique_id (void *cls,
1085 const struct GNUNET_HashCode *key,
1086 void *value)
1087{
1088 struct FindByUniqueIdContext *fui_ctx = cls;
1089 struct ClientQueryRecord *cqr = value;
1090
1091 if (cqr->unique_id != fui_ctx->unique_id)
1092 return GNUNET_YES;
1093 fui_ctx->cqr = cqr;
1094 return GNUNET_NO;
1095}
1096
1097
1098/**
1099 * Handler for "GET result seen" messages from the client.
1100 *
1101 * @param cls closure for the service
1102 * @param client the client we received this message from
1103 * @param message the actual message received
1104 */
1105static void
1106handle_dht_local_get_result_seen (void *cls,
1107 struct GNUNET_SERVER_Client *client,
1108 const struct GNUNET_MessageHeader *message)
1109{
1110 const struct GNUNET_DHT_ClientGetResultSeenMessage *seen;
1111 uint16_t size;
1112 unsigned int hash_count;
1113 unsigned int old_count;
1114 const struct GNUNET_HashCode *hc;
1115 struct FindByUniqueIdContext fui_ctx;
1116 struct ClientQueryRecord *cqr;
1117
1118 size = ntohs (message->size);
1119 if (size < sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage))
1120 {
1121 GNUNET_break (0);
1122 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1123 return;
1124 }
1125 seen = (const struct GNUNET_DHT_ClientGetResultSeenMessage *) message;
1126 hash_count = (size - sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage)) / sizeof (struct GNUNET_HashCode);
1127 if (size != sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage) + hash_count * sizeof (struct GNUNET_HashCode))
1128 {
1129 GNUNET_break (0);
1130 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1131 return;
1132 }
1133 hc = (const struct GNUNET_HashCode*) &seen[1];
1134 fui_ctx.unique_id = seen->unique_id;
1135 fui_ctx.cqr = NULL;
1136 GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
1137 &seen->key,
1138 &find_by_unique_id,
1139 &fui_ctx);
1140 if (NULL == (cqr = fui_ctx.cqr))
1141 {
1142 GNUNET_break (0);
1143 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1144 return;
1145 }
1146 /* finally, update 'seen' list */
1147 old_count = cqr->seen_replies_count;
1148 GNUNET_array_grow (cqr->seen_replies,
1149 cqr->seen_replies_count,
1150 cqr->seen_replies_count + hash_count);
1151 GNUNET_memcpy (&cqr->seen_replies[old_count],
1152 hc,
1153 sizeof (struct GNUNET_HashCode) * hash_count);
1154}
1155
1156
1157/**
1158 * Closure for #remove_by_unique_id().
1159 */
1160struct RemoveByUniqueIdContext
1161{
1162 /**
1163 * Client that issued the removal request.
1164 */
1165 struct ClientList *client;
1166
1167 /**
1168 * Unique ID of the request.
1169 */
1170 uint64_t unique_id;
1171};
1172
1173
1174/**
1175 * Iterator over hash map entries that frees all entries
1176 * that match the given client and unique ID.
1177 *
1178 * @param cls unique ID and client to search for in source routes
1179 * @param key current key code
1180 * @param value value in the hash map, a ClientQueryRecord
1181 * @return #GNUNET_YES (we should continue to iterate)
1182 */
1183static int
1184remove_by_unique_id (void *cls,
1185 const struct GNUNET_HashCode *key,
1186 void *value)
1187{
1188 const struct RemoveByUniqueIdContext *ctx = cls;
1189 struct ClientQueryRecord *record = value;
1190
1191 if (record->unique_id != ctx->unique_id)
1192 return GNUNET_YES;
1193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1194 "Removing client %p's record for key %s (by unique id)\n",
1195 ctx->client->client_handle, GNUNET_h2s (key));
1196 return remove_client_records (ctx->client, key, record);
1197}
1198
1199
1200/**
1201 * Handler for any generic DHT stop messages, calls the appropriate handler
1202 * depending on message type (if processed locally)
1203 *
1204 * @param cls closure for the service
1205 * @param client the client we received this message from
1206 * @param message the actual message received
1207 *
1208 */
1209static void
1210handle_dht_local_get_stop (void *cls,
1211 struct GNUNET_SERVER_Client *client,
1212 const struct GNUNET_MessageHeader *message)
1213{
1214 const struct GNUNET_DHT_ClientGetStopMessage *dht_stop_msg =
1215 (const struct GNUNET_DHT_ClientGetStopMessage *) message;
1216 struct RemoveByUniqueIdContext ctx;
1217
1218 GNUNET_STATISTICS_update (GDS_stats,
1219 gettext_noop
1220 ("# GET STOP requests received from clients"), 1,
1221 GNUNET_NO);
1222 LOG (GNUNET_ERROR_TYPE_DEBUG,
1223 "Received GET STOP request for %s from local client %p\n",
1224 GNUNET_h2s (&dht_stop_msg->key),
1225 client);
1226 ctx.client = find_active_client (client);
1227 ctx.unique_id = dht_stop_msg->unique_id;
1228 GNUNET_CONTAINER_multihashmap_get_multiple (forward_map, &dht_stop_msg->key,
1229 &remove_by_unique_id, &ctx);
1230 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1231}
1232
1233
1234/**
1235 * Handler for monitor start messages
1236 *
1237 * @param cls closure for the service
1238 * @param client the client we received this message from
1239 * @param message the actual message received
1240 *
1241 */
1242static void
1243handle_dht_local_monitor (void *cls,
1244 struct GNUNET_SERVER_Client *client,
1245 const struct GNUNET_MessageHeader *message)
1246{
1247 struct ClientMonitorRecord *r;
1248 const struct GNUNET_DHT_MonitorStartStopMessage *msg;
1249
1250 msg = (struct GNUNET_DHT_MonitorStartStopMessage *) message;
1251 r = GNUNET_new (struct ClientMonitorRecord);
1252
1253 r->client = find_active_client(client);
1254 r->type = ntohl(msg->type);
1255 r->get = ntohs(msg->get);
1256 r->get_resp = ntohs(msg->get_resp);
1257 r->put = ntohs(msg->put);
1258 if (0 == ntohs(msg->filter_key))
1259 r->key = NULL;
1260 else
1261 {
1262 r->key = GNUNET_new (struct GNUNET_HashCode);
1263 GNUNET_memcpy (r->key, &msg->key, sizeof (struct GNUNET_HashCode));
1264 }
1265 GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, r);
1266 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1267}
1268
1269
1270/**
1271 * Handler for monitor stop messages
1272 *
1273 * @param cls closure for the service
1274 * @param client the client we received this message from
1275 * @param message the actual message received
1276 */
1277static void
1278handle_dht_local_monitor_stop (void *cls,
1279 struct GNUNET_SERVER_Client *client,
1280 const struct GNUNET_MessageHeader *message)
1281{
1282 struct ClientMonitorRecord *r;
1283 const struct GNUNET_DHT_MonitorStartStopMessage *msg;
1284 int keys_match;
1285
1286 msg = (struct GNUNET_DHT_MonitorStartStopMessage *) message;
1287 r = monitor_head;
1288
1289 while (NULL != r)
1290 {
1291 if (NULL == r->key)
1292 keys_match = (0 == ntohs(msg->filter_key));
1293 else
1294 {
1295 keys_match = (0 != ntohs(msg->filter_key)
1296 && !memcmp(r->key, &msg->key, sizeof(struct GNUNET_HashCode)));
1297 }
1298 if (find_active_client(client) == r->client
1299 && ntohl(msg->type) == r->type
1300 && r->get == msg->get
1301 && r->get_resp == msg->get_resp
1302 && r->put == msg->put
1303 && keys_match
1304 )
1305 {
1306 GNUNET_CONTAINER_DLL_remove (monitor_head, monitor_tail, r);
1307 GNUNET_free_non_null (r->key);
1308 GNUNET_free (r);
1309 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1310 return; /* Delete only ONE entry */
1311 }
1312 r = r->next;
1313 }
1314 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1315}
1316
1317
1318/**
1319 * Functions with this signature are called whenever a client
1320 * is disconnected on the network level.
1321 *
1322 * @param cls closure (NULL for dht)
1323 * @param client identification of the client; NULL
1324 * for the last call when the server is destroyed
1325 */
1326static void
1327handle_client_disconnect (void *cls,
1328 struct GNUNET_SERVER_Client *client)
1329{
1330 struct ClientList *pos;
1331 struct PendingMessage *reply;
1332 struct ClientMonitorRecord *monitor;
1333
1334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1335 "Local client %p disconnects\n",
1336 client);
1337 pos = find_active_client (client);
1338 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, pos);
1339 if (pos->transmit_handle != NULL)
1340 GNUNET_SERVER_notify_transmit_ready_cancel (pos->transmit_handle);
1341 while (NULL != (reply = pos->pending_head))
1342 {
1343 GNUNET_CONTAINER_DLL_remove (pos->pending_head, pos->pending_tail, reply);
1344 GNUNET_free (reply);
1345 }
1346 monitor = monitor_head;
1347 while (NULL != monitor)
1348 {
1349 if (monitor->client == pos)
1350 {
1351 struct ClientMonitorRecord *next;
1352
1353 GNUNET_free_non_null (monitor->key);
1354 next = monitor->next;
1355 GNUNET_CONTAINER_DLL_remove (monitor_head, monitor_tail, monitor);
1356 GNUNET_free (monitor);
1357 monitor = next;
1358 }
1359 else
1360 monitor = monitor->next;
1361 }
1362 GNUNET_CONTAINER_multihashmap_iterate (forward_map, &remove_client_records,
1363 pos);
1364 GNUNET_free (pos);
1365}
1366
1367
1368/**
1369 * Initialize client subsystem.
1370 *
1371 * @param server the initialized server
1372 */
1373void
1374GDS_CLIENTS_init (struct GNUNET_SERVER_Handle *server)
1375{
1376 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1377 {&handle_dht_local_put, NULL,
1378 GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT, 0},
1379 {&handle_dht_local_get, NULL,
1380 GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET, 0},
1381 {&handle_dht_local_get_stop, NULL,
1382 GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_STOP,
1383 sizeof (struct GNUNET_DHT_ClientGetStopMessage)},
1384 {&handle_dht_local_monitor, NULL,
1385 GNUNET_MESSAGE_TYPE_DHT_MONITOR_START,
1386 sizeof (struct GNUNET_DHT_MonitorStartStopMessage)},
1387 {&handle_dht_local_monitor_stop, NULL,
1388 GNUNET_MESSAGE_TYPE_DHT_MONITOR_STOP,
1389 sizeof (struct GNUNET_DHT_MonitorStartStopMessage)},
1390 {&handle_dht_local_get_result_seen, NULL,
1391 GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_RESULTS_KNOWN, 0},
1392 {NULL, NULL, 0, 0}
1393 };
1394 forward_map = GNUNET_CONTAINER_multihashmap_create (1024, GNUNET_NO);
1395 retry_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
1396 GNUNET_SERVER_add_handlers (server, plugin_handlers);
1397 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
1398}
1399
1400
1401/**
1402 * Shutdown client subsystem.
1403 */
1404void
1405GDS_CLIENTS_done ()
1406{
1407 GNUNET_assert (client_head == NULL);
1408 GNUNET_assert (client_tail == NULL);
1409 if (NULL != retry_task)
1410 {
1411 GNUNET_SCHEDULER_cancel (retry_task);
1412 retry_task = NULL;
1413 }
1414 if (NULL != retry_heap)
1415 {
1416 GNUNET_assert (0 == GNUNET_CONTAINER_heap_get_size (retry_heap));
1417 GNUNET_CONTAINER_heap_destroy (retry_heap);
1418 retry_heap = NULL;
1419 }
1420 if (NULL != forward_map)
1421 {
1422 GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size (forward_map));
1423 GNUNET_CONTAINER_multihashmap_destroy (forward_map);
1424 forward_map = NULL;
1425 }
1426}
1427
1428/* end of gnunet-service-wdht_clients.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-05 14:27:21 +0000