GNUnet  0.11.x
gnunet-service-messenger_room.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020--2021 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  GNUnet is distributed in the hope that it will be useful, but
11  WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
27 
30 
34 
36 
40 #include "messenger_api_util.h"
41 
42 static void
43 idle_request_room_messages (void *cls);
44 
47 {
48  GNUNET_assert((handle) && (key));
49 
51 
52  room->service = handle->service;
53  room->host = handle;
54  room->port = NULL;
55 
56  GNUNET_memcpy(&(room->key), key, sizeof(struct GNUNET_HashCode));
57 
59 
63 
64  init_list_tunnels (&(room->basement));
65  init_message_state(&(room->state));
66 
67  room->peer_message = NULL;
68 
69  init_list_messages (&(room->handling));
70  room->idle = NULL;
71 
72  if (room->service->dir)
73  load_room (room);
74 
76 
77  return room;
78 }
79 
80 static int
81 iterate_destroy_tunnels (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
82 {
83  struct GNUNET_MESSENGER_SrvTunnel *tunnel = value;
84  destroy_tunnel (tunnel);
85  return GNUNET_YES;
86 }
87 
88 static void
90 
91 void
93 {
94  GNUNET_assert(room);
95 
96  if (room->idle)
97  {
99 
100  room->idle = NULL;
101  }
102 
103  if (room->port)
105 
107 
108  handle_room_messages (room);
109 
110  if (room->service->dir)
111  save_room (room);
112 
116 
118 
119  clear_list_tunnels (&(room->basement));
120  clear_message_state(&(room->state));
121 
122  if (room->peer_message)
123  GNUNET_free(room->peer_message);
124 
125  GNUNET_free(room);
126 }
127 
130 {
131  GNUNET_assert(room);
132 
133  return &(room->member_store);
134 }
135 
138 {
139  GNUNET_assert(room);
140 
141  return &(room->message_store);
142 }
143 
146 {
147  GNUNET_assert(room);
148 
149  return &(room->operation_store);
150 }
151 
152 static int
154  struct GNUNET_MESSENGER_SrvTunnel *tunnel)
155 {
156  if ((!handle) || (!is_tunnel_connected (tunnel)))
157  return GNUNET_NO;
158 
159  return send_tunnel_message (tunnel, handle, create_message_info (get_handle_ego (handle)));
160 }
161 
162 static void*
163 callback_room_connect (void *cls, struct GNUNET_CADET_Channel *channel, const struct GNUNET_PeerIdentity *source)
164 {
165  struct GNUNET_MESSENGER_SrvRoom *room = cls;
166 
167  struct GNUNET_MESSENGER_SrvTunnel *tunnel = create_tunnel (room, source);
168 
169  if ((tunnel) &&
170  (GNUNET_OK != GNUNET_CONTAINER_multipeermap_put (room->tunnels, source, tunnel,
172  {
173  destroy_tunnel (tunnel);
174  tunnel = NULL;
175  }
176 
177  if (!tunnel)
178  {
179  delayed_disconnect_channel (channel);
180  return NULL;
181  }
182 
183  bind_tunnel(tunnel, channel);
184 
185  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "New tunnel in room (%s) established to peer: %s\n",
186  GNUNET_h2s(get_room_key(room)), GNUNET_i2s (source));
187 
188  if (GNUNET_YES == send_room_info (room, room->host, tunnel))
189  return tunnel;
190 
191  disconnect_tunnel (tunnel);
192 
193  if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_remove (room->tunnels, source, tunnel))
194  destroy_tunnel (tunnel);
195 
196  return NULL;
197 }
198 
199 static int
201  struct GNUNET_MESSENGER_Member *member)
202 {
203  GNUNET_assert((room) && (handle) && (member));
204 
205  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Joining room: %s (%s)\n", GNUNET_h2s (get_room_key (room)),
206  GNUNET_sh2s (get_member_id(member)));
207 
208  if (GNUNET_OK != change_handle_member_id (handle, get_room_key(room), get_member_id(member)))
209  return GNUNET_NO;
210 
211  struct GNUNET_MESSENGER_Message *message = create_message_join (get_handle_ego (handle));
212 
213  if (!message)
214  {
215  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Your join message could not be created!\n");
216 
217  return GNUNET_NO;
218  }
219 
220  return send_room_message (room, handle, message);
221 }
222 
224 {
228 };
229 
230 static void
232  struct GNUNET_CONTAINER_MultiHashMap *map, int check_permission)
233 {
234  if (session->prev)
235  notify_about_members (notify, session->prev, map, GNUNET_YES);
236 
237  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(notify->room);
238  struct GNUNET_MESSENGER_ListMessage *element;
239 
240  for (element = session->messages.head; element; element = element->next)
241  {
242  if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains(map, &(element->hash)))
243  continue;
244 
245  if ((GNUNET_YES == check_permission) &&
246  (GNUNET_YES != check_member_session_history(notify->session, &(element->hash), GNUNET_NO)))
247  continue;
248 
249  if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put(map, &(element->hash), NULL,
251  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Notification of session message could be duplicated!\n");
252 
253  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, &(element->hash));
254 
255  if (message)
256  notify_handle_message (notify->handle, get_room_key(notify->room), session, message, &(element->hash));
257  }
258 }
259 
260 static int
261 iterate_notify_about_members (void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key,
263 {
265 
266  if ((notify->session == session) || (GNUNET_YES == is_member_session_completed(session)))
267  return GNUNET_YES;
268 
270 
271  notify_about_members (notify, session, map, GNUNET_NO);
272 
274  return GNUNET_YES;
275 }
276 
277 static int
279 {
280  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (handle, get_room_key(room));
281 
282  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
283  struct GNUNET_MESSENGER_Member *member = add_store_member(member_store, member_id);
284 
285  if (GNUNET_NO == join_room (room, handle, member))
286  return GNUNET_NO;
287 
288  const struct GNUNET_MESSENGER_Ego *ego = get_handle_ego(handle);
289  struct GNUNET_MESSENGER_MemberSession *session = get_member_session (member, &(ego->pub));
290 
291  if (!session)
292  {
293  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "A valid session is required to join a room!\n");
294  return GNUNET_NO;
295  }
296 
297  struct GNUNET_MESSENGER_MemberNotify notify;
298 
299  notify.room = room;
300  notify.handle = handle;
301  notify.session = session;
302 
304 
305  return GNUNET_YES;
306 }
307 
308 extern int
309 check_tunnel_message (void *cls, const struct GNUNET_MessageHeader *header);
310 
311 extern void
312 handle_tunnel_message (void *cls, const struct GNUNET_MessageHeader *header);
313 
314 extern void
315 callback_tunnel_disconnect (void *cls, const struct GNUNET_CADET_Channel *channel);
316 
317 int
319 {
320  GNUNET_assert((room) && (handle));
321 
322  if (room->port)
323  return join_room_locally (room, handle);
324 
325  struct GNUNET_CADET_Handle *cadet = get_room_cadet (room);
326  const struct GNUNET_HashCode *key = get_room_key (room);
327 
329  struct GNUNET_MessageHeader, NULL),
331 
332  struct GNUNET_HashCode port;
333  convert_messenger_key_to_port(key, &port);
335  handlers);
336 
337  if (room->port)
338  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Port of room (%s) was opened!\n",
339  GNUNET_h2s(get_room_key(room)));
340  else
341  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Port of room (%s) could not be opened!\n",
342  GNUNET_h2s(get_room_key(room)));
343 
344  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (handle, get_room_key(room));
345 
346  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
347  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, member_id);
348 
349  if (member)
350  goto exit_open_room;
351 
352  member = add_store_member(member_store, member_id);
353 
354  if ((GNUNET_NO == join_room (room, handle, member)) && (room->port))
355  {
356  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "You could not join the room, therefore it keeps closed!\n");
357 
359  room->port = NULL;
360 
361  return GNUNET_NO;
362  }
363 
364 exit_open_room:
365  return (room->port ? send_room_message (room, handle, create_message_peer (room->service)) : GNUNET_NO);
366 }
367 
368 int
370  const struct GNUNET_PeerIdentity *door)
371 {
372  GNUNET_assert((room) && (handle) && (door));
373 
374  struct GNUNET_PeerIdentity peer;
375 
376  if ((GNUNET_OK == get_service_peer_identity (room->service, &peer)) &&
377  (0 == GNUNET_memcmp(&peer, door)))
378  return join_room_locally (room, handle);
379 
381 
382  if (!tunnel)
383  {
384  tunnel = create_tunnel (room, door);
385 
386  if (GNUNET_OK != GNUNET_CONTAINER_multipeermap_put (room->tunnels, door, tunnel,
388  {
389  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "You could not connect to that door!\n");
390  destroy_tunnel (tunnel);
391  return GNUNET_NO;
392  }
393  }
394 
395  if (GNUNET_SYSERR == connect_tunnel (tunnel))
396  {
397  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Connection failure during entrance!\n");
398  GNUNET_CONTAINER_multipeermap_remove (room->tunnels, door, tunnel);
399  destroy_tunnel (tunnel);
400  return GNUNET_NO;
401  }
402 
403  return join_room_locally (room, handle);
404 }
405 
406 struct GNUNET_MQ_Envelope*
408  struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, int mode)
409 {
410  GNUNET_assert((room) && (handle) && (message) && (hash));
411 
413 
414  const struct GNUNET_ShortHashCode *id = get_handle_member_id (handle, get_room_key(room));
415 
416  GNUNET_assert(id);
417 
418  GNUNET_memcpy(&(message->header.sender_id), id, sizeof(struct GNUNET_ShortHashCode));
419  get_message_state_chain_hash (&(room->state), &(message->header.previous));
420 
421  return pack_message (message, hash, get_handle_ego (handle), mode);
422 }
423 
425 {
431  int packed;
432 };
433 
434 static int
435 iterate_send_room_message (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
436 {
437  struct GNUNET_MESSENGER_SrvTunnel *tunnel = value;
438 
439  if ((!is_tunnel_connected (tunnel)) ||
441  return GNUNET_YES;
442 
443  struct GNUNET_MESSENGER_ClosureSendRoom *closure = cls;
444 
445  if (tunnel == closure->exclude)
446  return GNUNET_YES;
447 
448  struct GNUNET_MQ_Envelope *env = NULL;
449 
450  if (closure->packed == GNUNET_NO)
451  {
452  env = pack_room_message (closure->room, closure->handle, closure->message, closure->hash,
454 
455  if (env)
456  closure->packed = GNUNET_YES;
457  }
458  else
459  env = pack_message (closure->message, NULL, NULL, GNUNET_MESSENGER_PACK_MODE_ENVELOPE);
460 
461  if (env)
462  send_tunnel_envelope (tunnel, env, closure->hash);
463 
464  return GNUNET_YES;
465 }
466 
467 int
469  struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
470 
471 void
473  const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
474 
475 int
477  struct GNUNET_MESSENGER_Message *message)
478 {
479  GNUNET_assert((room) && (handle));
480 
481  if (!message)
482  return GNUNET_NO;
483 
484  if (GNUNET_YES == is_message_session_bound(message))
485  merge_room_last_messages(room, handle);
486 
487  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Sending message from handle with member id: %s\n",
489 
490  struct GNUNET_HashCode hash;
491  struct GNUNET_MESSENGER_ClosureSendRoom closure;
492 
493  closure.room = room;
494  closure.handle = handle;
495  closure.exclude = NULL;
496  closure.message = message;
497  closure.hash = &hash;
498  closure.packed = GNUNET_NO;
499 
501 
502  if (GNUNET_NO == closure.packed)
503  pack_room_message (room, handle, message, &hash, GNUNET_MESSENGER_PACK_MODE_UNKNOWN);
504 
505  const int new_message = update_room_message (room, message, &hash);
506 
507  if (GNUNET_YES != new_message)
508  return GNUNET_SYSERR;
509 
510  switch (message->header.kind)
511  {
513  send_message_join (room, handle, message, &hash);
514  break;
516  send_message_peer (room, handle, message, &hash);
517  break;
519  send_message_id (room, handle, message, &hash);
520  break;
522  send_message_request (room, handle, message, &hash);
523  break;
524  default:
525  break;
526  }
527 
528  callback_room_handle_message (room, handle, message, &hash);
529  return GNUNET_YES;
530 }
531 
532 void
534  struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
535 {
536  GNUNET_assert((room) && (tunnel));
537 
538  if (!message)
539  return;
540 
541  struct GNUNET_MESSENGER_ClosureSendRoom closure;
542  struct GNUNET_HashCode message_hash;
543 
544  GNUNET_memcpy(&message_hash, hash, sizeof(struct GNUNET_HashCode));
545 
546  closure.room = room;
547  closure.handle = NULL;
548  closure.exclude = tunnel;
549  closure.message = message;
550  closure.hash = &message_hash;
551  closure.packed = GNUNET_YES;
552 
554 }
555 
556 void
558 {
559  if (!room->peer_message)
560  return;
561 
562  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
563 
564  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, room->peer_message);
565 
566  if (!message)
567  {
568  GNUNET_free(room->peer_message);
569  room->peer_message = NULL;
570  return;
571  }
572 
573  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
574  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
575 
576  if (!member)
577  goto resend_peer_message;
578 
580 
581  if (GNUNET_YES == is_member_session_closed(session))
582  goto resend_peer_message;
583 
584  if (tunnel)
585  forward_tunnel_message(tunnel, message, room->peer_message);
586 
587  return;
588 
589 resend_peer_message:
590  if (room->host)
591  send_room_message (room, room->host, create_message_peer (room->service));
592 }
593 
594 void
596 {
597  GNUNET_assert(room);
598 
599  if (!handle)
600  return;
601 
602  const struct GNUNET_HashCode *hash;
603 
604 merge_next:
605  hash = get_message_state_merge_hash (&(room->state));
606 
607  if (!hash)
608  return;
609 
610  send_room_message (room, handle, create_message_merge (hash));
611  goto merge_next;
612 }
613 
614 void
616 {
618  {
619  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Deletion of message failed! (%s)\n", GNUNET_h2s(hash));
620  return;
621  }
622 }
623 
624 void
626 {
627  if (!room->host)
628  return;
629 
630  send_room_message (room, room->host, create_message_merge (hash));
631 }
632 
633 int
635  const struct GNUNET_HashCode *hash, const struct GNUNET_TIME_Relative delay)
636 {
637  GNUNET_assert((room) && (session) && (hash));
638 
640 
641  if (0 == GNUNET_memcmp(&forever, &delay))
642  {
643  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Deletion is delayed forever: operation is impossible!\n");
644  return GNUNET_SYSERR;
645  }
646 
647  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
648 
649  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
650 
651  if (!message)
652  return GNUNET_YES;
653 
654  if (GNUNET_YES != check_member_session_history(session, hash, GNUNET_YES))
655  {
656  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Unpermitted request for deletion by member (%s) of message (%s)!\n",
657  GNUNET_sh2s(get_member_session_id(session)), GNUNET_h2s(hash));
658 
659  return GNUNET_NO;
660  }
661 
662  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
663 
664  if (GNUNET_OK != use_store_operation(operation_store, hash, GNUNET_MESSENGER_OP_DELETE, delay))
665  {
666  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Deletion has failed: operation denied!\n");
667  return GNUNET_SYSERR;
668  }
669 
670  return GNUNET_YES;
671 }
672 
673 struct GNUNET_CADET_Handle*
675 {
676  GNUNET_assert(room);
677 
678  return room->service->cadet;
679 }
680 
681 const struct GNUNET_HashCode*
683 {
684  GNUNET_assert(room);
685 
686  return &(room->key);
687 }
688 
689 const struct GNUNET_MESSENGER_SrvTunnel*
691 {
692  GNUNET_assert((room) && (peer));
693 
694  return GNUNET_CONTAINER_multipeermap_get (room->tunnels, peer);
695 }
696 
697 static int
700  GNUNET_MESSENGER_MessageRequestCallback callback, void* cls)
701 {
702  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
703 
705  message_store, hash, GNUNET_YES
706  );
707 
708  if (!link)
709  goto forward;
710 
711  int result = request_room_message_step(room, &(link->first), session, callback, cls);
712 
713  if ((GNUNET_YES == link->multiple) &&
714  (GNUNET_YES == request_room_message_step(room, &(link->second), session, callback, cls)))
715  return GNUNET_YES;
716  else
717  return result;
718 
719 forward:
720  if (GNUNET_YES != check_member_session_history(session, hash, GNUNET_NO))
721  return GNUNET_YES;
722 
723  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
724 
725  if (!message)
726  return GNUNET_NO;
727 
728  if (callback)
729  callback (cls, room, message, hash);
730 
731  return GNUNET_YES;
732 }
733 
734 int
737  GNUNET_MESSENGER_MessageRequestCallback callback, void* cls)
738 {
739  GNUNET_assert((room) && (hash));
740 
741  int result = request_room_message_step (room, hash, session, callback, cls);
742 
743  if ((GNUNET_NO == result) && (callback))
744  callback (cls, room, NULL, hash);
745 
746  return result;
747 }
748 
749 void
751 {
752  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
753 
754  if (!room->host)
755  return;
756 
757  struct GNUNET_PeerIdentity identity;
758  get_tunnel_peer_identity(tunnel, &identity);
759 
760  if ((GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove (room->tunnels, &identity, tunnel)) ||
762  return;
763 
764  if (GNUNET_YES == contains_list_tunnels (&(room->basement), &identity))
765  send_room_message (room, room->host, create_message_miss (&identity));
766 }
767 
768 int
770  struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
771 {
772  if (GNUNET_MESSENGER_KIND_UNKNOWN == message->header.kind)
773  {
774  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Kind is unknown! (%d)\n", message->header.kind);
775  return GNUNET_SYSERR;
776  }
777 
778  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
779 
780  const struct GNUNET_MESSENGER_Message *previous = get_store_message(message_store, &(message->header.previous));
781 
782  if (!previous)
783  goto skip_time_comparison;
784 
785  struct GNUNET_TIME_Absolute timestamp = GNUNET_TIME_absolute_ntoh(message->header.timestamp);
787 
788  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(timestamp, last).rel_value_us)
789  {
790  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Timestamp does not check out!\n");
791  return GNUNET_SYSERR;
792  }
793 
794 skip_time_comparison:
795  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Receiving message of kind: %s!\n",
797 
798  return GNUNET_OK;
799 }
800 
801 static void
803 {
804  struct GNUNET_MESSENGER_SrvRoom *room = cls;
805 
806  room->idle = NULL;
807 
808  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
809  const struct GNUNET_HashCode *hash = get_message_state_merge_hash(&(room->state));
810 
811  if ((hash) &&
812  (GNUNET_MESSENGER_OP_UNKNOWN == get_store_operation_type(operation_store, hash)))
814  operation_store,
815  hash,
818  );
819 
824  cls
825  );
826 }
827 
828 void
830  const struct GNUNET_ShortHashCode *member_id, struct GNUNET_TIME_Absolute timestamp)
831 {
832  GNUNET_assert ((room) && (public_key) && (member_id));
833 
834  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
835  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, member_id);
836 
837  if ((!member) || (1 >= GNUNET_CONTAINER_multihashmap_size(member->sessions)))
838  return;
839 
840  struct GNUNET_MESSENGER_ListHandles *handles = &(room->service->handles);
841  struct GNUNET_MESSENGER_ListHandle* element;
842 
843  for (element = handles->head; element; element = element->next)
844  {
845  if (0 != GNUNET_memcmp(member_id, get_handle_member_id(element->handle, get_room_key(room))))
846  continue;
847 
848  if (0 == GNUNET_memcmp(public_key, &(get_handle_ego(element->handle)->pub)))
849  continue;
850 
852 
853  if (!session)
854  continue;
855 
856  struct GNUNET_TIME_Absolute start = get_member_session_start(session);
857 
858  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(start, timestamp).rel_value_us)
859  continue;
860 
861  struct GNUNET_ShortHashCode random_id;
862  generate_free_member_id (&random_id, member_store->members);
863 
864  send_room_message(room, element->handle, create_message_id(&random_id));
865  }
866 }
867 
868 void
870 {
871  GNUNET_assert(room);
872 
873  struct GNUNET_PeerIdentity peer;
874  size_t src;
875 
876  if ((GNUNET_OK != get_service_peer_identity (room->service, &peer)) ||
877  (!find_list_tunnels (&(room->basement), &peer, &src)))
878  return;
879 
880  size_t count = count_of_tunnels (&(room->basement));
881 
882  struct GNUNET_MESSENGER_ListTunnel *element = room->basement.head;
883  struct GNUNET_MESSENGER_SrvTunnel *tunnel;
884 
885  size_t dst = 0;
886 
887  while (element)
888  {
889  GNUNET_PEER_resolve (element->peer, &peer);
890 
891  tunnel = GNUNET_CONTAINER_multipeermap_get (room->tunnels, &peer);
892 
893  if (!tunnel)
894  {
895  element = remove_from_list_tunnels (&(room->basement), element);
896  continue;
897  }
898 
899  if (GNUNET_YES == required_connection_between (count, src, dst))
900  {
901  if (GNUNET_SYSERR == connect_tunnel (tunnel))
902  {
903  element = remove_from_list_tunnels (&(room->basement), element);
904  continue;
905  }
906  }
907  else
908  disconnect_tunnel (tunnel);
909 
910  element = element->next;
911  dst++;
912  }
913 }
914 
915 static void
917 {
918  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
919  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
920 
921  while (room->handling.head)
922  {
923  struct GNUNET_MESSENGER_ListMessage *element = room->handling.head;
924 
925  const struct GNUNET_MESSENGER_Message *message = get_store_message (message_store, &(element->hash));
926 
927  if (!message)
928  goto finish_handling;
929 
930  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
931 
932  if (!member)
933  goto finish_handling;
934 
935  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, &(element->hash));
936 
937  if (session)
938  handle_service_message (room->service, room, session, message, &(element->hash));
939 
940 finish_handling:
941  GNUNET_CONTAINER_DLL_remove(room->handling.head, room->handling.tail, element);
942  GNUNET_free(element);
943  }
944 }
945 
946 int
948  struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
949 {
950  GNUNET_assert((room) && (message) && (hash));
951 
952  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
953 
954  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
956  );
957 
958  if (GNUNET_YES == requested)
959  cancel_store_operation(operation_store, hash);
960 
961  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
962 
963  const struct GNUNET_MESSENGER_Message *old_message = get_store_message (message_store, hash);
964 
965  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle a message in room (%s).\n", GNUNET_h2s (get_room_key(room)));
966 
967  if ((old_message) || (GNUNET_OK != put_store_message (message_store, hash, message)))
968  {
969  if (old_message != message)
970  destroy_message(message);
971 
972  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Duplicate message got dropped!\n");
973  return GNUNET_NO;
974  }
975 
976  update_message_state(&(room->state), requested, message, hash);
977 
978  if ((GNUNET_YES == requested) ||
979  (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
981  return GNUNET_YES;
982 
983  if ((GNUNET_MESSENGER_KIND_MERGE == message->header.kind) &&
984  (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->body.merge.previous))))
985  cancel_store_operation(operation_store, &(message->body.merge.previous));
986 
987  if (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->header.previous)))
988  cancel_store_operation(operation_store, &(message->header.previous));
989 
990  return GNUNET_YES;
991 }
992 
994 {
997 
999 };
1000 
1002 {
1004  const struct GNUNET_HashCode *hash;
1005 
1008 };
1009 
1010 static int
1011 iterate_update_member_sessions (void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key,
1013 {
1014  struct GNUNET_MESSENGER_MemberUpdate *update = cls;
1015 
1016  update_member_session_history(session, update->message, update->hash);
1017 
1018  if (GNUNET_YES == is_member_session_completed(session))
1019  {
1022  );
1023 
1024  element->session = session;
1025 
1026  GNUNET_CONTAINER_DLL_insert_tail(update->head, update->tail, element);
1027  }
1028 
1029  return GNUNET_YES;
1030 }
1031 
1032 static void
1034 
1035 void
1037  const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
1038 {
1039  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
1040  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
1041 
1042  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Callback for message (%s)\n", GNUNET_h2s (hash));
1043 
1044  if (!member)
1045  {
1046  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Member is missing!\n");
1047  return;
1048  }
1049 
1050  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
1051 
1052  if (!session)
1053  {
1054  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Session is missing!\n");
1055  return;
1056  }
1057 
1058  struct GNUNET_MESSENGER_MemberUpdate update;
1059  update.message = message;
1060  update.hash = hash;
1061 
1062  update.head = NULL;
1063  update.tail = NULL;
1064 
1065  iterate_store_members(member_store, iterate_update_member_sessions, &update);
1066 
1067  while (update.head)
1068  {
1069  struct GNUNET_MESSENGER_MemberSessionCompletion *element = update.head;
1070 
1071  remove_room_member_session (room, element->session);
1072 
1073  GNUNET_CONTAINER_DLL_remove(update.head, update.tail, element);
1074  GNUNET_free (element);
1075  }
1076 
1077  const int start_handle = room->handling.head ? GNUNET_NO : GNUNET_YES;
1078 
1079  add_to_list_messages (&(room->handling), hash);
1080 
1081  switch (message->header.kind)
1082  {
1084  handle_message_join (room, session, message, hash);
1085  break;
1087  handle_message_leave (room, session, message, hash);
1088  break;
1090  handle_message_name (room, session, message, hash);
1091  break;
1093  handle_message_key (room, session, message, hash);
1094  break;
1096  handle_message_peer (room, session, message, hash);
1097  break;
1099  handle_message_id (room, session, message, hash);
1100  break;
1102  handle_message_miss (room, session, message, hash);
1103  break;
1105  handle_message_delete (room, session, message, hash);
1106  break;
1107  default:
1108  break;
1109  }
1110 
1111  if (GNUNET_YES == start_handle)
1112  handle_room_messages (room);
1113 }
1114 
1115 static void
1117 {
1118  GNUNET_assert((room) && (dir));
1119 
1120  GNUNET_asprintf (dir, "%s%s%c%s%c", room->service->dir, "rooms", DIR_SEPARATOR, GNUNET_h2s (get_room_key(room)), DIR_SEPARATOR);
1121 }
1122 
1123 void
1125 {
1126  GNUNET_assert(room);
1127 
1128  char *room_dir;
1129  get_room_data_subdir (room, &room_dir);
1130 
1132  {
1133  load_member_store (get_room_member_store(room), room_dir);
1134  load_message_store (get_room_message_store(room), room_dir);
1136 
1137  char *basement_file;
1138  GNUNET_asprintf (&basement_file, "%s%s", room_dir, "basement.list");
1139 
1140  load_list_tunnels(&(room->basement), basement_file);
1141  GNUNET_free(basement_file);
1142 
1143  char *last_messages_file;
1144  GNUNET_asprintf (&last_messages_file, "%s%s", room_dir, "last_messages.list");
1145 
1146  load_message_state(&(room->state), room_dir);
1147  }
1148 
1149  GNUNET_free(room_dir);
1150 }
1151 
1152 void
1154 {
1155  GNUNET_assert(room);
1156 
1157  char *room_dir;
1158  get_room_data_subdir (room, &room_dir);
1159 
1160  if ((GNUNET_YES == GNUNET_DISK_directory_test (room_dir, GNUNET_NO)) ||
1161  (GNUNET_OK == GNUNET_DISK_directory_create (room_dir)))
1162  {
1163  save_member_store(get_room_member_store(room), room_dir);
1164  save_message_store (get_room_message_store(room), room_dir);
1166 
1167  char *basement_file;
1168  GNUNET_asprintf (&basement_file, "%s%s", room_dir, "basement.list");
1169 
1170  save_list_tunnels(&(room->basement), basement_file);
1171  GNUNET_free(basement_file);
1172 
1173  save_message_state(&(room->state), room_dir);
1174  }
1175 
1176  GNUNET_free(room_dir);
1177 }
1178 
1179 static void
1181 {
1182  GNUNET_assert ((room) && (session));
1183 
1184  remove_member_session (session->member, session);
1185 
1186  const struct GNUNET_IDENTITY_PublicKey *public_key = get_member_session_public_key(session);
1187 
1188  struct GNUNET_HashCode hash;
1189  GNUNET_CRYPTO_hash(public_key, sizeof(*public_key), &hash);
1190 
1191  char *room_dir;
1192  get_room_data_subdir (room, &room_dir);
1193 
1194  char* session_dir;
1195  GNUNET_asprintf (
1196  &session_dir, "%s%s%c%s%c%s%c%s%c", room_dir,
1197  "members", DIR_SEPARATOR,
1199  "sessions", DIR_SEPARATOR,
1200  GNUNET_h2s(&hash), DIR_SEPARATOR
1201  );
1202 
1203  GNUNET_free (room_dir);
1204 
1205  GNUNET_DISK_directory_remove(session_dir);
1206  GNUNET_free (session_dir);
1207 
1208  destroy_member_session(session);
1209 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
int open_room(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle)
Tries to open a room for a given handle.
static struct GNUNET_CADET_Handle * cadet
Handle for cadet.
void send_message_join(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a sent join message to ensure growth of the decentralized room structure. ...
struct GNUNET_MESSENGER_MessageHeader header
Header.
void handle_message_name(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent name message to rename a current member.
static char * dir
Set to the directory where runtime files are stored.
Definition: gnunet-arm.c:89
struct GNUNET_MESSENGER_MemberStore member_store
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
void save_room(struct GNUNET_MESSENGER_SrvRoom *room)
Saves the configuration for a given room of a service which contains the last messages hash and the r...
int contains_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer)
Tests linearly if the list of tunnels peer identities contains a specific peer identity and returns G...
struct GNUNET_MESSENGER_MessageStore * get_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
struct GNUNET_MESSENGER_MemberSession * session
GNUnet MESSENGER service.
void destroy_message(struct GNUNET_MESSENGER_Message *message)
Destroys a message and frees its memory fully.
struct GNUNET_ShortHashCode sender_id
The senders id inside of the room the message was sent in.
struct GNUNET_MESSENGER_ListMessage * next
void solve_room_member_collisions(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_IDENTITY_PublicKey *public_key, const struct GNUNET_ShortHashCode *member_id, struct GNUNET_TIME_Absolute timestamp)
Checks for potential collisions with member ids and solves them changing active handles ids if they u...
#define GNUNET_MESSENGER_MERGE_DELAY
void handle_message_peer(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent peer message to make changes of the basement in the room.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:542
void delayed_disconnect_channel(struct GNUNET_CADET_Channel *channel)
Starts an urgent task to close a CADET channel asynchronously.
static void idle_request_room_messages(void *cls)
static int request_room_message_step(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_MemberSession *session, GNUNET_MESSENGER_MessageRequestCallback callback, void *cls)
struct GNUNET_TIME_AbsoluteNBO timestamp
The timestamp of the message.
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
GNUnet MESSENGER service.
struct GNUNET_MESSENGER_MessageState state
struct GNUNET_MESSENGER_MessageStore message_store
struct GNUNET_CADET_Handle * cadet
struct GNUNET_MESSENGER_ListMessage * head
GNUnet MESSENGER service.
void init_message_state(struct GNUNET_MESSENGER_MessageState *state)
void save_message_store(struct GNUNET_MESSENGER_MessageStore *store, const char *directory)
Saves messages from a message store into a directory.
Opaque handle to the service.
Definition: cadet_api.c:38
static int join_room(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Member *member)
struct GNUNET_MESSENGER_MemberSession * session
void check_room_peer_status(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Checks the current state of opening a given room from this peer and re-publishes it if necessary to a...
static int iterate_notify_about_members(void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key, struct GNUNET_MESSENGER_MemberSession *session)
struct GNUNET_MESSENGER_ListHandles handles
void load_message_state(struct GNUNET_MESSENGER_MessageState *state, const char *path)
struct GNUNET_CONTAINER_MultiShortmap * members
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1199
struct GNUNET_MESSENGER_Service * service
static int iterate_send_room_message(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
void save_message_state(const struct GNUNET_MESSENGER_MessageState *state, const char *path)
static void * callback_room_connect(void *cls, struct GNUNET_CADET_Channel *channel, const struct GNUNET_PeerIdentity *source)
int is_message_session_bound(const struct GNUNET_MESSENGER_Message *message)
Returns if the message should be bound to a member session.
const struct GNUNET_MESSENGER_MessageLink * get_store_message_link(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash, int deleted_only)
Returns the message link from a message store matching a given hash.
GNUnet MESSENGER service.
void handle_message_leave(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent leave message to make changes of current member information.
int callback_verify_room_message(struct GNUNET_MESSENGER_SrvRoom *room, void *cls, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
struct GNUNET_MESSENGER_MemberSession * get_member_session(const struct GNUNET_MESSENGER_Member *member, const struct GNUNET_IDENTITY_PublicKey *public_key)
Returns the member session of a member identified by a given public key.
int get_service_peer_identity(const struct GNUNET_MESSENGER_Service *service, struct GNUNET_PeerIdentity *peer)
Tries to write the peer identity of the peer running a service on to the peer parameter.
void destroy_room(struct GNUNET_MESSENGER_SrvRoom *room)
Destroys a room and frees its memory fully.
struct GNUNET_MESSENGER_SrvHandle * handle
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int is_member_session_closed(const struct GNUNET_MESSENGER_MemberSession *session)
Returns if the given member session has been closed.
int iterate_store_members(struct GNUNET_MESSENGER_MemberStore *store, GNUNET_MESSENGER_MemberIteratorCallback it, void *cls)
Iterate through all member sessions currently connected to the members of the given member store and ...
struct GNUNET_MESSENGER_ListTunnel * head
int is_member_session_completed(const struct GNUNET_MESSENGER_MemberSession *session)
Returns if the given member session has been completed.
void save_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, const char *path)
Saves the list of tunnels peer identities to a file under a given path.
struct GNUNET_MESSENGER_SrvRoom * room
int delete_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Deletes a message in the message store.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
void callback_room_handle_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
int connect_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Tries to connect a tunnel by creating a new CADET channel and binding it.
int GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
void update_member_session_history(struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Adds a given message to the history of a session using the messages hash.
void init_member_store(struct GNUNET_MESSENGER_MemberStore *store, struct GNUNET_MESSENGER_SrvRoom *room)
Initializes a member store as fully empty connected to a room.
Opaque handle to a channel.
Definition: cadet.h:116
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_MESSENGER_PACK_MODE_UNKNOWN
struct GNUNET_MESSENGER_ListTunnel * next
int send_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Message *message)
Sends a message from a given handle into a room.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_MESSAGE_TYPE_CADET_CLI
Traffic (net-cat style) used by the Command Line Interface.
#define GNUNET_MESSENGER_VERSION
Version number of GNUnet Messenger API.
void handle_message_key(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent key message to change the key of a member and rearrange the contacts accor...
struct GNUNET_CADET_Port * port
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL)...
static enum @8 mode
Should we do a PUT (mode = 0) or GET (mode = 1);.
int change_handle_member_id(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key, const struct GNUNET_ShortHashCode *unique_id)
Changes the member id of a given handle in a specific room to match a unique_id and returns GNUNET_OK...
static int iterate_destroy_tunnels(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
struct GNUNET_MESSENGER_ListHandle * next
void GNUNET_PEER_resolve(GNUNET_PEER_Id id, struct GNUNET_PeerIdentity *pid)
Convert an interned PID to a normal peer identity.
Definition: peer.c:225
struct GNUNET_CADET_Handle * get_room_cadet(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the CADET handle from a rooms service.
Internal representation of the hash map.
static void destroy_tunnel(void *cls)
This tunnel is no longer used, destroy it.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
const struct GNUNET_MESSENGER_SrvTunnel * get_room_tunnel(const struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_PeerIdentity *peer)
Returns a tunnel inside of a room leading towards a given peer if such a tunnel exists, otherwise NULL.
struct GNUNET_MESSENGER_MemberStore * get_room_member_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used member store of a given room.
A 256-bit hashcode.
static struct GNUNET_CONTAINER_MultiPeerMap * map
Handle to the map used to store old latency values for peers.
void callback_room_disconnect(struct GNUNET_MESSENGER_SrvRoom *room, void *cls)
void handle_message_miss(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent miss message to drop a peer from the basement in the room.
int required_connection_between(size_t count, size_t src, size_t dst)
Returns GNUNET_YES or GNUNET_NO to determine if the peers of index src and index dst should be connec...
void save_member_store(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Saves members from a member store into a directory.
uint32_t get_tunnel_messenger_version(const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Returns the current messenger version the peer connected via a given tunnel has reported to be using ...
struct GNUNET_MESSENGER_OperationStore operation_store
struct GNUNET_TIME_Absolute get_member_session_start(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the timestamp of the member session&#39;s start.
int is_tunnel_connected(const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Returns the status of a currently bound channel of a tunnel.
struct GNUNET_MQ_Envelope * pack_message(struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_Ego *ego, int mode)
Encodes the message to pack it into a newly allocated envelope if mode is equal to GNUNET_MESSENGER_P...
static int send_room_info(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_SrvTunnel *tunnel)
void callback_room_deletion(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash)
struct GNUNET_MESSENGER_OperationStore * get_room_operation_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used operation store of a given room.
const struct GNUNET_HashCode * get_message_state_merge_hash(const struct GNUNET_MESSENGER_MessageState *state)
struct GNUNET_SCHEDULER_Task * idle
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_with_priority(enum GNUNET_SCHEDULER_Priority prio, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified priority.
Definition: scheduler.c:1223
void init_list_messages(struct GNUNET_MESSENGER_ListMessages *messages)
Initializes list of message hashes as empty list.
struct GNUNET_CADET_Port * GNUNET_CADET_open_port(struct GNUNET_CADET_Handle *h, const struct GNUNET_HashCode *port, GNUNET_CADET_ConnectEventHandler connects, void *connects_cls, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Open a port to receive incoming MQ-based channels.
Definition: cadet_api.c:970
struct GNUNET_MESSENGER_Service * service
void send_message_request(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a sent request message to trigger the request operation for this service. ...
, &#39; bother checking if a value already exists (faster than GNUNET_CONTAINER_MULTIHASHMAPOPTION_...
int request_room_message(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_MemberSession *session, GNUNET_MESSENGER_MessageRequestCallback callback, void *cls)
Requests a message from a room identified by a given hash.
static char * value
Value of the record to add/remove.
struct GNUNET_IDENTITY_PublicKey pub
struct GNUNET_MESSENGER_SrvRoom * room
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_forever_(void)
Return "forever".
Definition: time.c:163
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_zero_(void)
Return relative time of 0ms.
Definition: time.c:100
struct GNUNET_HashCode * peer_message
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
struct GNUNET_HashCode previous
The hash of a second previous message.
void add_to_list_messages(struct GNUNET_MESSENGER_ListMessages *messages, const struct GNUNET_HashCode *hash)
Adds a specific hash from a message to the end of the list.
void load_message_store(struct GNUNET_MESSENGER_MessageStore *store, const char *directory)
Loads messages from a directory into a message store.
void get_tunnel_peer_identity(const struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_PeerIdentity *peer)
Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter...
int check_tunnel_message(void *cls, const struct GNUNET_MessageHeader *header)
void send_message_peer(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a sent peer message to update the rooms peer message of this service.
static struct GNUNET_PEERINFO_NotifyContext * notify
Handle to the peerinfo notify service (NULL until we&#39;ve connected to it).
void() GNUNET_MESSENGER_MessageRequestCallback(void *cls, struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Method called whenever a message is found during a request in a room.
struct GNUNET_MESSENGER_Message * create_message_info(const struct GNUNET_MESSENGER_Ego *ego)
Creates and allocates a new info message containing the hosts EGO public key and a newly generated un...
GNUnet MESSENGER service.
void send_message_id(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a sent id message to update the handles member id in the room.
void merge_room_last_messages(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle)
Reduces all current forks inside of the message history of a room to one remaining last message by me...
struct GNUNET_MESSENGER_MessageBody body
Body.
int generate_free_member_id(struct GNUNET_ShortHashCode *id, const struct GNUNET_CONTAINER_MultiShortmap *members)
Tries to generate an unused member id and store it into the id parameter.
struct GNUNET_MQ_Envelope * pack_room_message(const struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, int mode)
Packs a message depending on the selected mode into a newly allocated envelope.
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
struct GNUNET_MESSENGER_SrvRoom * room
void clear_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels)
Clears the list of tunnels peer identities.
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
static int result
Global testing status.
struct GNUNET_MESSENGER_SrvTunnel * create_tunnel(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_PeerIdentity *door)
Creates and allocates a tunnel of a room to a specific peer identity (called door).
struct GNUNET_MESSENGER_Message * message
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_create(const char *dir)
Implementation of "mkdir -p".
Definition: disk.c:496
struct GNUNET_MESSENGER_Message * create_message_merge(const struct GNUNET_HashCode *previous)
Creates and allocates a new merge message containing the hash of a second previous message besides th...
void clear_operation_store(struct GNUNET_MESSENGER_OperationStore *store)
Clears an operation store, stops all operations and deallocates its memory.
void load_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, const char *path)
Loads the list of tunnels peer identities from a file under a given path.
#define GNUNET_MESSENGER_IDLE_DELAY
static int forward
Search direction: forward.
Definition: gnunet-abd.c:162
struct GNUNET_MESSENGER_Message * create_message_id(const struct GNUNET_ShortHashCode *unique_id)
Creates and allocates a new id message containing the unique member id to change to.
struct GNUNET_MESSENGER_MessageMerge merge
size_t count_of_tunnels(const struct GNUNET_MESSENGER_ListTunnels *tunnels)
Returns the count of peers in a list (typically from the basement of a room).
struct GNUNET_MESSENGER_ListMessages handling
A 512-bit hashcode.
void handle_service_message(struct GNUNET_MESSENGER_Service *service, struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Sends a received or sent message with a given hash to each handle of a service which is currently mem...
int check_member_session_history(const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash, int ownership)
Checks the history of a session for a specific message which is identified by its hash and if the own...
void destroy_member_session(struct GNUNET_MESSENGER_MemberSession *session)
Destroys a member session and frees its memory fully.
const struct GNUNET_MESSENGER_Message * get_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Returns the message from a message store matching a given hash.
Message handler for a specific message type.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:86
void clear_member_store(struct GNUNET_MESSENGER_MemberStore *store)
Clears a member store, wipes its content and deallocates its memory.
enum GNUNET_MESSENGER_OperationType get_store_operation_type(const struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash)
Returns the type of the active operation under a given hash in a specific operation store...
messenger api: client implementation of GNUnet MESSENGER service
Run when otherwise idle.
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
void notify_handle_message(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key, const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Notifies the handle that a new message was received or sent.
static GstElement * source
Appsrc instance into which we write data for the pipeline.
#define DIR_SEPARATOR
Definition: platform.h:164
static void remove_room_member_session(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session)
void clear_message_state(struct GNUNET_MESSENGER_MessageState *state)
void handle_tunnel_message(void *cls, const struct GNUNET_MessageHeader *header)
struct GNUNET_HashCode previous
The hash of the previous message from the senders perspective.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct GNUNET_HashCode key
The key used in the DHT.
struct GNUNET_MESSENGER_SrvHandle * host
GNUnet MESSENGER service.
GNUnet MESSENGER service.
void callback_tunnel_disconnect(void *cls, const struct GNUNET_CADET_Channel *channel)
int update_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
struct GNUNET_MESSENGER_ListMessages messages
int delete_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_HashCode *hash, const struct GNUNET_TIME_Relative delay)
Deletes a message from the room with a given hash in a specific delay if the provided member by its s...
struct GNUNET_MESSENGER_Message * create_message_join(const struct GNUNET_MESSENGER_Ego *ego)
Creates and allocates a new join message containing the clients EGO public key.
#define GNUNET_MESSENGER_PACK_MODE_ENVELOPE
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
struct GNUNET_MESSENGER_Message * create_message_miss(const struct GNUNET_PeerIdentity *peer)
Creates and allocates a new miss message containing the missing peer identity.
static int iterate_update_member_sessions(void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key, struct GNUNET_MESSENGER_MemberSession *session)
void rebuild_room_basement_structure(struct GNUNET_MESSENGER_SrvRoom *room)
Rebuilds the decentralized structure for a room by ensuring all required connections are made dependi...
struct GNUNET_MESSENGER_ListMessage * tail
static struct GNUNET_TIME_Relative delay
When should dkg communication start?
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
void init_operation_store(struct GNUNET_MESSENGER_OperationStore *store, struct GNUNET_MESSENGER_SrvRoom *room)
Initializes an operation store as fully empty with a given room.
int use_store_operation(struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash, enum GNUNET_MESSENGER_OperationType type, struct GNUNET_TIME_Relative delay)
Tries to use an operation under a given hash in a specific operation store.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
void cancel_store_operation(struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash)
Stops any active operation under a given hash in a specific operation store.
void remove_member_session(struct GNUNET_MESSENGER_Member *member, struct GNUNET_MESSENGER_MemberSession *session)
Removes a given member session from its member.
void save_operation_store(const struct GNUNET_MESSENGER_OperationStore *store, const char *directory)
Saves operations from an operation store into a directory.
const struct GNUNET_MESSENGER_Message * message
void convert_messenger_key_to_port(const struct GNUNET_HashCode *key, struct GNUNET_HashCode *port)
Converts a Messenger service key of a room to the specific port which gets used for the CADET channel...
struct GNUNET_MESSENGER_Member * get_store_member_of(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_MESSENGER_Message *message)
Returns the member of a store using a sender id of a given message.
Allow multiple values with the same key.
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
void forward_tunnel_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Forwards a given message with a known hash through a tunnel.
struct GNUNET_MESSENGER_Message * create_message_peer(const struct GNUNET_MESSENGER_Service *service)
Creates and allocates a new peer message containing a services peer identity.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
struct GNUNET_MESSENGER_SrvRoom * create_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Creates and allocates a new room for a handle with a given key.
int enter_room_at(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_PeerIdentity *door)
Connects a tunnel to a hosting peer of a room through a so called door which is represented by a peer...
The identity of the host (wraps the signing key of the peer).
struct GNUNET_MESSENGER_MemberSessionCompletion * tail
An identity key as per LSD0001.
void get_message_state_chain_hash(const struct GNUNET_MESSENGER_MessageState *state, struct GNUNET_HashCode *hash)
void handle_message_id(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent id message to change a members id.
void init_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels)
Initializes list of tunnels peer identities as empty list.
void callback_room_merge(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash)
struct GNUNET_CONTAINER_MultiHashMap * sessions
struct GNUNET_MESSENGER_MemberSessionCompletion * next
struct GNUNET_MESSENGER_ListTunnels basement
void * GNUNET_CONTAINER_multipeermap_get(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Given a key find a value in the map matching the key.
#define GNUNET_log(kind,...)
const struct GNUNET_IDENTITY_PublicKey * get_member_session_public_key(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the public key from an EGO of a given member session.
void update_message_state(struct GNUNET_MESSENGER_MessageState *state, int requested, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void load_member_store(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Loads members from a directory into a member store.
int send_tunnel_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, void *handle, struct GNUNET_MESSENGER_Message *message)
Sends a message by packing it automatically into an envelope and passing it through the tunnel...
void bind_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_CADET_Channel *channel)
Binds a CADET channel to a tunnel and replaces its channel the tunnel is currently bound to if necess...
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
const struct GNUNET_HashCode * get_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
void load_operation_store(struct GNUNET_MESSENGER_OperationStore *store, const char *directory)
Loads operations from a directory into an operation store.
void init_message_store(struct GNUNET_MESSENGER_MessageStore *store)
Initializes a message store as fully empty.
Header for all communications.
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
void GNUNET_CADET_close_port(struct GNUNET_CADET_Port *p)
Close a port opened with GNUNET_CADET_open_port().
Definition: cadet_api.c:808
Time for absolute times used by GNUnet, in microseconds.
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_difference(struct GNUNET_TIME_Absolute start, struct GNUNET_TIME_Absolute end)
Compute the time difference between the given start and end times.
Definition: time.c:248
void disconnect_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Disconnects and unbinds a channel from a tunnel.
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_remove(const char *filename)
Remove all files in a directory (rm -rf).
Definition: disk.c:1084
struct GNUNET_MESSENGER_ListHandle * head
struct GNUNET_MESSENGER_Member * add_store_member(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Adds a member to a store under a specific id and returns it on success.
struct GNUNET_MESSENGER_MemberSessionCompletion * head
struct GNUNET_MESSENGER_SrvTunnel * exclude
void send_tunnel_envelope(struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MQ_Envelope *env, const struct GNUNET_HashCode *hash)
Sends an envelope containing a message with a given hash through a tunnel.
struct GNUNET_MESSENGER_SrvHandle * handle
static void get_room_data_subdir(struct GNUNET_MESSENGER_SrvRoom *room, char **dir)
int put_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash, struct GNUNET_MESSENGER_Message *message)
Stores a message into the message store.
struct GNUNET_MESSENGER_Member * get_store_member(const struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Returns the member in a store identified by a given id.
struct GNUNET_MESSENGER_ListTunnel * find_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer, size_t *index)
Searches linearly through the list of tunnels peer identities for matching a specific peer identity a...
static void handle_room_messages(struct GNUNET_MESSENGER_SrvRoom *room)
struct GNUNET_CONTAINER_MultiPeerMap * tunnels
int GNUNET_CONTAINER_multipeermap_contains(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Check if the map contains any value under the given key (including values that are NULL)...
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:464
const struct GNUNET_ShortHashCode * get_member_id(const struct GNUNET_MESSENGER_Member *member)
Returns the current id of a given member.
void load_room(struct GNUNET_MESSENGER_SrvRoom *room)
Loads the local configuration for a given room of a service which contains the last messages hash and...
struct GNUNET_MESSENGER_MemberSession * get_member_session_of(struct GNUNET_MESSENGER_Member *member, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Returns the member session of a member using a public key which can verify the signature of a given m...
void handle_message_delete(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent delete message to delete a specific message from the store.
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_test(const char *fil, int is_readable)
Test if fil is a directory and listable.
Definition: disk.c:404
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
struct GNUNET_MESSENGER_MemberSession * prev
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
void handle_message_join(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received or sent join message to make changes of current member information.
struct GNUNET_MESSENGER_MemberSessionCompletion * prev
const struct GNUNET_MESSENGER_Ego * get_handle_ego(const struct GNUNET_MESSENGER_SrvHandle *handle)
Returns the EGO used by a given handle.
static void notify_about_members(struct GNUNET_MESSENGER_MemberNotify *notify, struct GNUNET_MESSENGER_MemberSession *session, struct GNUNET_CONTAINER_MultiHashMap *map, int check_permission)
GNUnet MESSENGER service.
void forward_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Forwards a message with a given hash to a specific tunnel inside of a room.
const struct GNUNET_ShortHashCode * get_member_session_id(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the member id of a given member session.
struct GNUNET_MESSENGER_SrvHandle * handle
#define GNUNET_free(ptr)
Wrapper around free.
Time for relative time used by GNUnet, in microseconds.
static int join_room_locally(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle)
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_MESSENGER_ListTunnel * remove_from_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, struct GNUNET_MESSENGER_ListTunnel *element)
Removes a specific element from the list of tunnels peer identities and returns the next element in t...
void clear_message_store(struct GNUNET_MESSENGER_MessageStore *store)
Clears a message store, wipes its content and deallocates its memory.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972