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 
333  handlers);
334 
335  if (room->port)
336  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Port of room (%s) was opened!\n",
337  GNUNET_h2s(get_room_key(room)));
338  else
339  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Port of room (%s) could not be opened!\n",
340  GNUNET_h2s(get_room_key(room)));
341 
342  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (handle, get_room_key(room));
343 
344  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
345  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, member_id);
346 
347  if (member)
348  goto exit_open_room;
349 
350  member = add_store_member(member_store, member_id);
351 
352  if ((GNUNET_NO == join_room (room, handle, member)) && (room->port))
353  {
354  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "You could not join the room, therefore it keeps closed!\n");
355 
357  room->port = NULL;
358 
359  return GNUNET_NO;
360  }
361 
362 exit_open_room:
363  return (room->port ? send_room_message (room, handle, create_message_peer (room->service)) : GNUNET_NO);
364 }
365 
366 int
368  const struct GNUNET_PeerIdentity *door)
369 {
370  GNUNET_assert((room) && (handle) && (door));
371 
372  struct GNUNET_PeerIdentity peer;
373 
374  if ((GNUNET_OK == get_service_peer_identity (room->service, &peer)) &&
375  (0 == GNUNET_memcmp(&peer, door)))
376  return join_room_locally (room, handle);
377 
379 
380  if (!tunnel)
381  {
382  tunnel = create_tunnel (room, door);
383 
384  if (GNUNET_OK != GNUNET_CONTAINER_multipeermap_put (room->tunnels, door, tunnel,
386  {
387  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "You could not connect to that door!\n");
388  destroy_tunnel (tunnel);
389  return GNUNET_NO;
390  }
391  }
392 
393  if (GNUNET_SYSERR == connect_tunnel (tunnel))
394  {
395  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Connection failure during entrance!\n");
396  GNUNET_CONTAINER_multipeermap_remove (room->tunnels, door, tunnel);
397  destroy_tunnel (tunnel);
398  return GNUNET_NO;
399  }
400 
401  return join_room_locally (room, handle);
402 }
403 
404 struct GNUNET_MQ_Envelope*
406  struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, int mode)
407 {
408  GNUNET_assert((room) && (handle) && (message) && (hash));
409 
411 
412  const struct GNUNET_ShortHashCode *id = get_handle_member_id (handle, get_room_key(room));
413 
414  GNUNET_assert(id);
415 
416  GNUNET_memcpy(&(message->header.sender_id), id, sizeof(struct GNUNET_ShortHashCode));
417  get_message_state_chain_hash (&(room->state), &(message->header.previous));
418 
419  return pack_message (message, hash, get_handle_ego (handle), mode);
420 }
421 
423 {
429  int packed;
430 };
431 
432 static int
433 iterate_send_room_message (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
434 {
435  struct GNUNET_MESSENGER_SrvTunnel *tunnel = value;
436 
437  if ((!is_tunnel_connected (tunnel)) ||
439  return GNUNET_YES;
440 
441  struct GNUNET_MESSENGER_ClosureSendRoom *closure = cls;
442 
443  if (tunnel == closure->exclude)
444  return GNUNET_YES;
445 
446  struct GNUNET_MQ_Envelope *env = NULL;
447 
448  if (closure->packed == GNUNET_NO)
449  {
450  env = pack_room_message (closure->room, closure->handle, closure->message, closure->hash,
452 
453  if (env)
454  closure->packed = GNUNET_YES;
455  }
456  else
457  env = pack_message (closure->message, NULL, NULL, GNUNET_MESSENGER_PACK_MODE_ENVELOPE);
458 
459  if (env)
460  send_tunnel_envelope (tunnel, env, closure->hash);
461 
462  return GNUNET_YES;
463 }
464 
465 int
467  struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
468 
469 void
471  const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
472 
473 int
475  struct GNUNET_MESSENGER_Message *message)
476 {
477  GNUNET_assert((room) && (handle));
478 
479  if (!message)
480  return GNUNET_NO;
481 
482  if (GNUNET_YES == is_message_session_bound(message))
483  merge_room_last_messages(room, handle);
484 
485  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Sending message from handle with member id: %s\n",
487 
488  struct GNUNET_HashCode hash;
489  struct GNUNET_MESSENGER_ClosureSendRoom closure;
490 
491  closure.room = room;
492  closure.handle = handle;
493  closure.exclude = NULL;
494  closure.message = message;
495  closure.hash = &hash;
496  closure.packed = GNUNET_NO;
497 
499 
500  if (GNUNET_NO == closure.packed)
501  pack_room_message (room, handle, message, &hash, GNUNET_MESSENGER_PACK_MODE_UNKNOWN);
502 
503  const int new_message = update_room_message (room, message, &hash);
504 
505  if (GNUNET_YES != new_message)
506  return GNUNET_SYSERR;
507 
508  switch (message->header.kind)
509  {
511  send_message_join (room, handle, message, &hash);
512  break;
514  send_message_peer (room, handle, message, &hash);
515  break;
517  send_message_id (room, handle, message, &hash);
518  break;
520  send_message_request (room, handle, message, &hash);
521  break;
522  default:
523  break;
524  }
525 
526  callback_room_handle_message (room, handle, message, &hash);
527  return GNUNET_YES;
528 }
529 
530 void
532  struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
533 {
534  GNUNET_assert((room) && (tunnel));
535 
536  if (!message)
537  return;
538 
539  struct GNUNET_MESSENGER_ClosureSendRoom closure;
540  struct GNUNET_HashCode message_hash;
541 
542  GNUNET_memcpy(&message_hash, hash, sizeof(struct GNUNET_HashCode));
543 
544  closure.room = room;
545  closure.handle = NULL;
546  closure.exclude = tunnel;
547  closure.message = message;
548  closure.hash = &message_hash;
549  closure.packed = GNUNET_YES;
550 
552 }
553 
554 void
556 {
557  if (!room->peer_message)
558  return;
559 
560  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
561 
562  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, room->peer_message);
563 
564  if (!message)
565  {
566  GNUNET_free(room->peer_message);
567  room->peer_message = NULL;
568  return;
569  }
570 
571  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
572  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
573 
574  if (!member)
575  goto resend_peer_message;
576 
578 
579  if (GNUNET_YES == is_member_session_closed(session))
580  goto resend_peer_message;
581 
582  if (tunnel)
583  forward_tunnel_message(tunnel, message, room->peer_message);
584 
585  return;
586 
587 resend_peer_message:
588  if (room->host)
589  send_room_message (room, room->host, create_message_peer (room->service));
590 }
591 
592 void
594 {
595  GNUNET_assert(room);
596 
597  if (!handle)
598  return;
599 
600  const struct GNUNET_HashCode *hash;
601 
602 merge_next:
603  hash = get_message_state_merge_hash (&(room->state));
604 
605  if (!hash)
606  return;
607 
608  send_room_message (room, handle, create_message_merge (hash));
609  goto merge_next;
610 }
611 
612 void
614 {
616  {
617  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Deletion of message failed! (%s)\n", GNUNET_h2s(hash));
618  return;
619  }
620 }
621 
622 void
624 {
625  if (!room->host)
626  return;
627 
628  send_room_message (room, room->host, create_message_merge (hash));
629 }
630 
631 int
633  const struct GNUNET_HashCode *hash, const struct GNUNET_TIME_Relative delay)
634 {
635  GNUNET_assert((room) && (session) && (hash));
636 
638 
639  if (0 == GNUNET_memcmp(&forever, &delay))
640  {
641  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Deletion is delayed forever: operation is impossible!\n");
642  return GNUNET_SYSERR;
643  }
644 
645  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
646 
647  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
648 
649  if (!message)
650  return GNUNET_YES;
651 
652  if (GNUNET_YES != check_member_session_history(session, hash, GNUNET_YES))
653  {
654  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Unpermitted request for deletion by member (%s) of message (%s)!\n",
655  GNUNET_sh2s(get_member_session_id(session)), GNUNET_h2s(hash));
656 
657  return GNUNET_NO;
658  }
659 
660  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
661 
662  if (GNUNET_OK != use_store_operation(operation_store, hash, GNUNET_MESSENGER_OP_DELETE, delay))
663  {
664  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Deletion has failed: operation denied!\n");
665  return GNUNET_SYSERR;
666  }
667 
668  return GNUNET_YES;
669 }
670 
671 struct GNUNET_CADET_Handle*
673 {
674  GNUNET_assert(room);
675 
676  return room->service->cadet;
677 }
678 
679 const struct GNUNET_HashCode*
681 {
682  GNUNET_assert(room);
683 
684  return &(room->key);
685 }
686 
687 const struct GNUNET_MESSENGER_SrvTunnel*
689 {
690  GNUNET_assert((room) && (peer));
691 
692  return GNUNET_CONTAINER_multipeermap_get (room->tunnels, peer);
693 }
694 
695 static int
698  GNUNET_MESSENGER_MessageRequestCallback callback, void* cls)
699 {
700  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
701 
703  message_store, hash, GNUNET_YES
704  );
705 
706  if (!link)
707  goto forward;
708 
709  int result = request_room_message_step(room, &(link->first), session, callback, cls);
710 
711  if ((GNUNET_YES == link->multiple) &&
712  (GNUNET_YES == request_room_message_step(room, &(link->second), session, callback, cls)))
713  return GNUNET_YES;
714  else
715  return result;
716 
717 forward:
718  if (GNUNET_YES != check_member_session_history(session, hash, GNUNET_NO))
719  return GNUNET_YES;
720 
721  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
722 
723  if (!message)
724  return GNUNET_NO;
725 
726  if (callback)
727  callback (cls, room, message, hash);
728 
729  return GNUNET_YES;
730 }
731 
732 int
735  GNUNET_MESSENGER_MessageRequestCallback callback, void* cls)
736 {
737  GNUNET_assert((room) && (hash));
738 
739  int result = request_room_message_step (room, hash, session, callback, cls);
740 
741  if ((GNUNET_NO == result) && (callback))
742  callback (cls, room, NULL, hash);
743 
744  return result;
745 }
746 
747 void
749 {
750  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
751 
752  if (!room->host)
753  return;
754 
755  struct GNUNET_PeerIdentity identity;
756  get_tunnel_peer_identity(tunnel, &identity);
757 
758  if ((GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove (room->tunnels, &identity, tunnel)) ||
760  return;
761 
762  if (GNUNET_YES == contains_list_tunnels (&(room->basement), &identity))
763  send_room_message (room, room->host, create_message_miss (&identity));
764 }
765 
766 int
768  struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
769 {
770  if (GNUNET_MESSENGER_KIND_UNKNOWN == message->header.kind)
771  {
772  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Kind is unknown! (%d)\n", message->header.kind);
773  return GNUNET_SYSERR;
774  }
775 
776  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
777 
778  const struct GNUNET_MESSENGER_Message *previous = get_store_message(message_store, &(message->header.previous));
779 
780  if (!previous)
781  goto skip_time_comparison;
782 
783  struct GNUNET_TIME_Absolute timestamp = GNUNET_TIME_absolute_ntoh(message->header.timestamp);
785 
786  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(timestamp, last).rel_value_us)
787  {
788  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Timestamp does not check out!\n");
789  return GNUNET_SYSERR;
790  }
791 
792 skip_time_comparison:
793  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Receiving message of kind: %s!\n",
795 
796  return GNUNET_OK;
797 }
798 
799 static void
801 {
802  struct GNUNET_MESSENGER_SrvRoom *room = cls;
803 
804  room->idle = NULL;
805 
806  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
807  const struct GNUNET_HashCode *hash = get_message_state_merge_hash(&(room->state));
808 
809  if ((hash) &&
810  (GNUNET_MESSENGER_OP_UNKNOWN == get_store_operation_type(operation_store, hash)))
812  operation_store,
813  hash,
816  );
817 
822  cls
823  );
824 }
825 
826 void
828  const struct GNUNET_ShortHashCode *member_id, struct GNUNET_TIME_Absolute timestamp)
829 {
830  GNUNET_assert ((room) && (public_key) && (member_id));
831 
832  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
833  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, member_id);
834 
835  if ((!member) || (1 >= GNUNET_CONTAINER_multihashmap_size(member->sessions)))
836  return;
837 
838  struct GNUNET_MESSENGER_ListHandles *handles = &(room->service->handles);
839  struct GNUNET_MESSENGER_ListHandle* element;
840 
841  for (element = handles->head; element; element = element->next)
842  {
843  if (0 != GNUNET_memcmp(member_id, get_handle_member_id(element->handle, get_room_key(room))))
844  continue;
845 
846  if (0 == GNUNET_memcmp(public_key, &(get_handle_ego(element->handle)->pub)))
847  continue;
848 
850 
851  if (!session)
852  continue;
853 
854  struct GNUNET_TIME_Absolute start = get_member_session_start(session);
855 
856  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(start, timestamp).rel_value_us)
857  continue;
858 
859  struct GNUNET_ShortHashCode random_id;
860  generate_free_member_id (&random_id, member_store->members);
861 
862  send_room_message(room, element->handle, create_message_id(&random_id));
863  }
864 }
865 
866 void
868 {
869  GNUNET_assert(room);
870 
871  struct GNUNET_PeerIdentity peer;
872  size_t src;
873 
874  if ((GNUNET_OK != get_service_peer_identity (room->service, &peer)) ||
875  (!find_list_tunnels (&(room->basement), &peer, &src)))
876  return;
877 
878  size_t count = count_of_tunnels (&(room->basement));
879 
880  struct GNUNET_MESSENGER_ListTunnel *element = room->basement.head;
881  struct GNUNET_MESSENGER_SrvTunnel *tunnel;
882 
883  size_t dst = 0;
884 
885  while (element)
886  {
887  GNUNET_PEER_resolve (element->peer, &peer);
888 
889  tunnel = GNUNET_CONTAINER_multipeermap_get (room->tunnels, &peer);
890 
891  if (!tunnel)
892  {
893  element = remove_from_list_tunnels (&(room->basement), element);
894  continue;
895  }
896 
897  if (GNUNET_YES == required_connection_between (count, src, dst))
898  {
899  if (GNUNET_SYSERR == connect_tunnel (tunnel))
900  {
901  element = remove_from_list_tunnels (&(room->basement), element);
902  continue;
903  }
904  }
905  else
906  disconnect_tunnel (tunnel);
907 
908  element = element->next;
909  dst++;
910  }
911 }
912 
913 static void
915 {
916  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
917  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
918 
919  while (room->handling.head)
920  {
921  struct GNUNET_MESSENGER_ListMessage *element = room->handling.head;
922 
923  const struct GNUNET_MESSENGER_Message *message = get_store_message (message_store, &(element->hash));
924 
925  if (!message)
926  goto finish_handling;
927 
928  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
929 
930  if (!member)
931  goto finish_handling;
932 
933  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, &(element->hash));
934 
935  if (session)
936  handle_service_message (room->service, room, session, message, &(element->hash));
937 
938 finish_handling:
939  GNUNET_CONTAINER_DLL_remove(room->handling.head, room->handling.tail, element);
940  GNUNET_free(element);
941  }
942 }
943 
944 int
946  struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
947 {
948  GNUNET_assert((room) && (message) && (hash));
949 
950  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
951 
952  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
954  );
955 
956  if (GNUNET_YES == requested)
957  cancel_store_operation(operation_store, hash);
958 
959  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
960 
961  const struct GNUNET_MESSENGER_Message *old_message = get_store_message (message_store, hash);
962 
963  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle a message in room (%s).\n", GNUNET_h2s (get_room_key(room)));
964 
965  if ((old_message) || (GNUNET_OK != put_store_message (message_store, hash, message)))
966  {
967  if (old_message != message)
968  destroy_message(message);
969 
970  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Duplicate message got dropped!\n");
971  return GNUNET_NO;
972  }
973 
974  update_message_state(&(room->state), requested, message, hash);
975 
976  if ((GNUNET_YES == requested) ||
977  (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
979  return GNUNET_YES;
980 
981  if ((GNUNET_MESSENGER_KIND_MERGE == message->header.kind) &&
982  (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->body.merge.previous))))
983  cancel_store_operation(operation_store, &(message->body.merge.previous));
984 
985  if (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->header.previous)))
986  cancel_store_operation(operation_store, &(message->header.previous));
987 
988  return GNUNET_YES;
989 }
990 
992 {
995 
997 };
998 
1000 {
1002  const struct GNUNET_HashCode *hash;
1003 
1006 };
1007 
1008 static int
1009 iterate_update_member_sessions (void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key,
1011 {
1012  struct GNUNET_MESSENGER_MemberUpdate *update = cls;
1013 
1014  update_member_session_history(session, update->message, update->hash);
1015 
1016  if (GNUNET_YES == is_member_session_completed(session))
1017  {
1020  );
1021 
1022  element->session = session;
1023 
1024  GNUNET_CONTAINER_DLL_insert_tail(update->head, update->tail, element);
1025  }
1026 
1027  return GNUNET_YES;
1028 }
1029 
1030 static void
1032 
1033 void
1035  const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
1036 {
1037  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
1038  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
1039 
1040  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Callback for message (%s)\n", GNUNET_h2s (hash));
1041 
1042  if (!member)
1043  {
1044  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Member is missing!\n");
1045  return;
1046  }
1047 
1048  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
1049 
1050  if (!session)
1051  {
1052  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Session is missing!\n");
1053  return;
1054  }
1055 
1056  struct GNUNET_MESSENGER_MemberUpdate update;
1057  update.message = message;
1058  update.hash = hash;
1059 
1060  update.head = NULL;
1061  update.tail = NULL;
1062 
1063  iterate_store_members(member_store, iterate_update_member_sessions, &update);
1064 
1065  while (update.head)
1066  {
1067  struct GNUNET_MESSENGER_MemberSessionCompletion *element = update.head;
1068 
1069  remove_room_member_session (room, element->session);
1070 
1071  GNUNET_CONTAINER_DLL_remove(update.head, update.tail, element);
1072  GNUNET_free (element);
1073  }
1074 
1075  const int start_handle = room->handling.head ? GNUNET_NO : GNUNET_YES;
1076 
1077  add_to_list_messages (&(room->handling), hash);
1078 
1079  switch (message->header.kind)
1080  {
1082  handle_message_join (room, session, message, hash);
1083  break;
1085  handle_message_leave (room, session, message, hash);
1086  break;
1088  handle_message_name (room, session, message, hash);
1089  break;
1091  handle_message_key (room, session, message, hash);
1092  break;
1094  handle_message_peer (room, session, message, hash);
1095  break;
1097  handle_message_id (room, session, message, hash);
1098  break;
1100  handle_message_miss (room, session, message, hash);
1101  break;
1103  handle_message_delete (room, session, message, hash);
1104  break;
1105  default:
1106  break;
1107  }
1108 
1109  if (GNUNET_YES == start_handle)
1110  handle_room_messages (room);
1111 }
1112 
1113 static void
1115 {
1116  GNUNET_assert((room) && (dir));
1117 
1118  GNUNET_asprintf (dir, "%s%s%c%s%c", room->service->dir, "rooms", DIR_SEPARATOR, GNUNET_h2s (get_room_key(room)), DIR_SEPARATOR);
1119 }
1120 
1121 void
1123 {
1124  GNUNET_assert(room);
1125 
1126  char *room_dir;
1127  get_room_data_subdir (room, &room_dir);
1128 
1130  {
1131  load_member_store (get_room_member_store(room), room_dir);
1132  load_message_store (get_room_message_store(room), room_dir);
1134 
1135  char *basement_file;
1136  GNUNET_asprintf (&basement_file, "%s%s", room_dir, "basement.list");
1137 
1138  load_list_tunnels(&(room->basement), basement_file);
1139  GNUNET_free(basement_file);
1140 
1141  char *last_messages_file;
1142  GNUNET_asprintf (&last_messages_file, "%s%s", room_dir, "last_messages.list");
1143 
1144  load_message_state(&(room->state), room_dir);
1145  }
1146 
1147  GNUNET_free(room_dir);
1148 }
1149 
1150 void
1152 {
1153  GNUNET_assert(room);
1154 
1155  char *room_dir;
1156  get_room_data_subdir (room, &room_dir);
1157 
1158  if ((GNUNET_YES == GNUNET_DISK_directory_test (room_dir, GNUNET_NO)) ||
1159  (GNUNET_OK == GNUNET_DISK_directory_create (room_dir)))
1160  {
1161  save_member_store(get_room_member_store(room), room_dir);
1162  save_message_store (get_room_message_store(room), room_dir);
1164 
1165  char *basement_file;
1166  GNUNET_asprintf (&basement_file, "%s%s", room_dir, "basement.list");
1167 
1168  save_list_tunnels(&(room->basement), basement_file);
1169  GNUNET_free(basement_file);
1170 
1171  save_message_state(&(room->state), room_dir);
1172  }
1173 
1174  GNUNET_free(room_dir);
1175 }
1176 
1177 static void
1179 {
1180  GNUNET_assert ((room) && (session));
1181 
1182  remove_member_session (session->member, session);
1183 
1184  const struct GNUNET_IDENTITY_PublicKey *public_key = get_member_session_public_key(session);
1185 
1186  struct GNUNET_HashCode hash;
1187  GNUNET_CRYPTO_hash(public_key, sizeof(*public_key), &hash);
1188 
1189  char *room_dir;
1190  get_room_data_subdir (room, &room_dir);
1191 
1192  char* session_dir;
1193  GNUNET_asprintf (
1194  &session_dir, "%s%s%c%s%c%s%c%s%c", room_dir,
1195  "members", DIR_SEPARATOR,
1197  "sessions", DIR_SEPARATOR,
1198  GNUNET_h2s(&hash), DIR_SEPARATOR
1199  );
1200 
1201  GNUNET_free (room_dir);
1202 
1203  GNUNET_DISK_directory_remove(session_dir);
1204  GNUNET_free (session_dir);
1205 
1206  destroy_member_session(session);
1207 }
#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:474
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:476
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
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:905
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