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  const struct GNUNET_HashCode *key)
48 {
49  GNUNET_assert((handle) && (key));
50 
52 
53  room->service = handle->service;
54  room->host = handle;
55  room->port = NULL;
56 
57  GNUNET_memcpy(&(room->key), key, sizeof(struct GNUNET_HashCode));
58 
60 
64 
65  init_list_tunnels (&(room->basement));
66  init_message_state(&(room->state));
67 
68  room->peer_message = NULL;
69 
70  init_list_messages (&(room->handling));
71  room->idle = NULL;
72 
73  if (room->service->dir)
74  load_room (room);
75 
77 
78  return room;
79 }
80 
81 static int
83  const struct GNUNET_PeerIdentity *key,
84  void *value)
85 {
86  struct GNUNET_MESSENGER_SrvTunnel *tunnel = value;
87  destroy_tunnel (tunnel);
88  return GNUNET_YES;
89 }
90 
91 static void
93 
94 void
96 {
98 
99  if (room->idle)
100  {
102 
103  room->idle = NULL;
104  }
105 
106  if (room->port)
108 
110 
112 
113  if (room->service->dir)
114  save_room (room);
115 
119 
121 
124 
125  if (room->peer_message)
127 
128  GNUNET_free(room);
129 }
130 
133 {
135 
136  return &(room->member_store);
137 }
138 
141 {
142  GNUNET_assert(room);
143 
144  return &(room->message_store);
145 }
146 
149 {
151 
152  return &(room->operation_store);
153 }
154 
155 static int
158  struct GNUNET_MESSENGER_SrvTunnel *tunnel)
159 {
160  if ((!handle) || (!is_tunnel_connected (tunnel)))
161  return GNUNET_NO;
162 
164 }
165 
166 static void*
168  struct GNUNET_CADET_Channel *channel,
169  const struct GNUNET_PeerIdentity *source)
170 {
171  struct GNUNET_MESSENGER_SrvRoom *room = cls;
172 
174 
175  if ((tunnel) &&
178  {
179  destroy_tunnel (tunnel);
180  tunnel = NULL;
181  }
182 
183  if (!tunnel)
184  {
186  return NULL;
187  }
188 
189  bind_tunnel(tunnel, channel);
190 
191  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "New tunnel in room (%s) established to peer: %s\n",
193 
194  if (GNUNET_YES == send_room_info (room, room->host, tunnel))
195  return tunnel;
196 
197  disconnect_tunnel (tunnel);
198 
200  destroy_tunnel (tunnel);
201 
202  return NULL;
203 }
204 
205 static int
208  struct GNUNET_MESSENGER_Member *member)
209 {
210  GNUNET_assert((room) && (handle) && (member));
211 
212  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Joining room: %s (%s)\n", GNUNET_h2s (get_room_key (room)),
213  GNUNET_sh2s (get_member_id(member)));
214 
216  return GNUNET_NO;
217 
219 
220  if (!message)
221  {
222  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Your join message could not be created!\n");
223 
224  return GNUNET_NO;
225  }
226 
227  return send_room_message (room, handle, message);
228 }
229 
231 {
235 };
236 
237 static void
239  struct GNUNET_MESSENGER_MemberSession *session,
241  int check_permission)
242 {
243  if (session->prev)
245 
246  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(notify->room);
247  struct GNUNET_MESSENGER_ListMessage *element;
248 
249  for (element = session->messages.head; element; element = element->next)
250  {
252  continue;
253 
254  if ((GNUNET_YES == check_permission) &&
255  (GNUNET_YES != check_member_session_history(notify->session, &(element->hash), GNUNET_NO)))
256  continue;
257 
258  if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put(map, &(element->hash), NULL,
260  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Notification of session message could be duplicated!\n");
261 
262  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, &(element->hash));
263 
264  if (message)
265  notify_handle_message (notify->handle, get_room_key(notify->room), session, message, &(element->hash));
266  }
267 }
268 
269 static int
271  const struct GNUNET_IDENTITY_PublicKey *public_key,
272  struct GNUNET_MESSENGER_MemberSession *session)
273 {
275 
276  if ((notify->session == session) || (GNUNET_YES == is_member_session_completed(session)))
277  return GNUNET_YES;
278 
280 
282 
284  return GNUNET_YES;
285 }
286 
287 static int
290 {
291  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (handle, get_room_key(room));
292 
294  struct GNUNET_MESSENGER_Member *member = add_store_member(member_store, member_id);
295 
296  if (GNUNET_NO == join_room (room, handle, member))
297  return GNUNET_NO;
298 
299  const struct GNUNET_MESSENGER_Ego *ego = get_handle_ego(handle);
300  struct GNUNET_MESSENGER_MemberSession *session = get_member_session (member, &(ego->pub));
301 
302  if (!session)
303  {
304  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "A valid session is required to join a room!\n");
305  return GNUNET_NO;
306  }
307 
309 
310  notify.room = room;
311  notify.handle = handle;
312  notify.session = session;
313 
315 
316  return GNUNET_YES;
317 }
318 
319 extern int
320 check_tunnel_message (void *cls,
321  const struct GNUNET_MessageHeader *header);
322 
323 extern void
324 handle_tunnel_message (void *cls,
325  const struct GNUNET_MessageHeader *header);
326 
327 extern void
328 callback_tunnel_disconnect (void *cls,
329  const struct GNUNET_CADET_Channel *channel);
330 
331 int
334 {
335  GNUNET_assert((room) && (handle));
336 
337  if (room->port)
338  return join_room_locally (room, handle);
339 
340  struct GNUNET_CADET_Handle *cadet = get_room_cadet (room);
341  const struct GNUNET_HashCode *key = get_room_key (room);
342 
344  struct GNUNET_MessageHeader, NULL),
346 
347  struct GNUNET_HashCode port;
350  handlers);
351 
352  if (room->port)
353  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Port of room (%s) was opened!\n",
354  GNUNET_h2s(get_room_key(room)));
355  else
356  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Port of room (%s) could not be opened!\n",
357  GNUNET_h2s(get_room_key(room)));
358 
359  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (handle, get_room_key(room));
360 
362  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, member_id);
363 
364  if (member)
365  goto exit_open_room;
366 
367  member = add_store_member(member_store, member_id);
368 
369  if ((GNUNET_NO == join_room (room, handle, member)) && (room->port))
370  {
371  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "You could not join the room, therefore it keeps closed!\n");
372 
374  room->port = NULL;
375 
376  return GNUNET_NO;
377  }
378 
379 exit_open_room:
380  return (room->port ? send_room_message (room, handle, create_message_peer (room->service)) : GNUNET_NO);
381 }
382 
383 int
386  const struct GNUNET_PeerIdentity *door)
387 {
388  GNUNET_assert((room) && (handle) && (door));
389 
390  struct GNUNET_PeerIdentity peer;
391 
392  if ((GNUNET_OK == get_service_peer_identity (room->service, &peer)) &&
393  (0 == GNUNET_memcmp(&peer, door)))
394  return join_room_locally (room, handle);
395 
397 
398  if (!tunnel)
399  {
400  tunnel = create_tunnel (room, door);
401 
404  {
405  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "You could not connect to that door!\n");
406  destroy_tunnel (tunnel);
407  return GNUNET_NO;
408  }
409  }
410 
411  if (GNUNET_SYSERR == connect_tunnel (tunnel))
412  {
413  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Connection failure during entrance!\n");
415  destroy_tunnel (tunnel);
416  return GNUNET_NO;
417  }
418 
419  return join_room_locally (room, handle);
420 }
421 
422 struct GNUNET_MQ_Envelope*
424  const struct GNUNET_MESSENGER_SrvHandle *handle,
425  struct GNUNET_MESSENGER_Message *message,
426  struct GNUNET_HashCode *hash,
427  int mode)
428 {
429  GNUNET_assert((room) && (handle) && (message) && (hash));
430 
432 
433  const struct GNUNET_ShortHashCode *id = get_handle_member_id (handle, get_room_key(room));
434 
435  GNUNET_assert(id);
436 
437  GNUNET_memcpy(&(message->header.sender_id), id, sizeof(struct GNUNET_ShortHashCode));
438  get_message_state_chain_hash (&(room->state), &(message->header.previous));
439 
440  return pack_message (message, hash, get_handle_ego (handle), mode);
441 }
442 
444 {
450  int packed;
451 };
452 
453 static int
455  const struct GNUNET_PeerIdentity *key,
456  void *value)
457 {
458  struct GNUNET_MESSENGER_SrvTunnel *tunnel = value;
459 
460  if ((!is_tunnel_connected (tunnel)) ||
462  return GNUNET_YES;
463 
464  struct GNUNET_MESSENGER_ClosureSendRoom *closure = cls;
465 
466  if (tunnel == closure->exclude)
467  return GNUNET_YES;
468 
469  struct GNUNET_MQ_Envelope *env = NULL;
470 
471  if (closure->packed == GNUNET_NO)
472  {
473  env = pack_room_message (closure->room, closure->handle, closure->message, closure->hash,
475 
476  if (env)
477  closure->packed = GNUNET_YES;
478  }
479  else
481 
482  if (env)
483  send_tunnel_envelope (tunnel, env, closure->hash);
484 
485  return GNUNET_YES;
486 }
487 
488 int
490  struct GNUNET_MESSENGER_Message *message,
491  const struct GNUNET_HashCode *hash);
492 
493 void
496  const struct GNUNET_MESSENGER_Message *message,
497  const struct GNUNET_HashCode *hash);
498 
499 int
502  struct GNUNET_MESSENGER_Message *message)
503 {
504  GNUNET_assert((room) && (handle));
505 
506  if (!message)
507  return GNUNET_NO;
508 
509  if (GNUNET_YES == is_message_session_bound(message))
511 
512  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Sending message from handle with member id: %s\n",
514 
515  struct GNUNET_HashCode hash;
516  struct GNUNET_MESSENGER_ClosureSendRoom closure;
517 
518  closure.room = room;
519  closure.handle = handle;
520  closure.exclude = NULL;
521  closure.message = message;
522  closure.hash = &hash;
523  closure.packed = GNUNET_NO;
524 
526 
527  if (GNUNET_NO == closure.packed)
529 
530  const int new_message = update_room_message (room, message, &hash);
531 
532  if (GNUNET_YES != new_message)
533  return GNUNET_SYSERR;
534 
535  switch (message->header.kind)
536  {
539  break;
542  break;
545  break;
548  break;
549  default:
550  break;
551  }
552 
554  return GNUNET_YES;
555 }
556 
557 void
559  struct GNUNET_MESSENGER_SrvTunnel *tunnel,
561  const struct GNUNET_HashCode *hash)
562 {
563  GNUNET_assert((room) && (tunnel));
564 
565  if (!message)
566  return;
567 
568  struct GNUNET_MESSENGER_ClosureSendRoom closure;
569  struct GNUNET_HashCode message_hash;
570 
571  GNUNET_memcpy(&message_hash, hash, sizeof(struct GNUNET_HashCode));
572 
573  closure.room = room;
574  closure.handle = NULL;
575  closure.exclude = tunnel;
576  closure.message = message;
577  closure.hash = &message_hash;
578  closure.packed = GNUNET_YES;
579 
581 }
582 
583 void
585  struct GNUNET_MESSENGER_SrvTunnel *tunnel)
586 {
587  if (!room->peer_message)
588  return;
589 
590  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
591 
592  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, room->peer_message);
593 
594  if (!message)
595  {
596  GNUNET_free(room->peer_message);
597  room->peer_message = NULL;
598  return;
599  }
600 
602  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
603 
604  if (!member)
605  goto resend_peer_message;
606 
607  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, room->peer_message);
608 
609  if (GNUNET_YES == is_member_session_closed(session))
610  goto resend_peer_message;
611 
612  if (tunnel)
613  forward_tunnel_message(tunnel, message, room->peer_message);
614 
615  return;
616 
617 resend_peer_message:
618  if (room->host)
619  send_room_message (room, room->host, create_message_peer (room->service));
620 }
621 
622 void
625 {
626  GNUNET_assert(room);
627 
628  if (!handle)
629  return;
630 
631  const struct GNUNET_HashCode *hash;
632 
633 merge_next:
634  hash = get_message_state_merge_hash (&(room->state));
635 
636  if (!hash)
637  return;
638 
640  goto merge_next;
641 }
642 
643 void
645  const struct GNUNET_HashCode *hash)
646 {
648  {
649  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Deletion of message failed! (%s)\n", GNUNET_h2s(hash));
650  return;
651  }
652 }
653 
654 void
656  const struct GNUNET_HashCode *hash)
657 {
658  if (!room->host)
659  return;
660 
661  send_room_message (room, room->host, create_message_merge (hash));
662 }
663 
664 int
666  struct GNUNET_MESSENGER_MemberSession *session,
667  const struct GNUNET_HashCode *hash,
668  const struct GNUNET_TIME_Relative delay)
669 {
670  GNUNET_assert((room) && (session) && (hash));
671 
673 
674  if (0 == GNUNET_memcmp(&forever, &delay))
675  {
676  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Deletion is delayed forever: operation is impossible!\n");
677  return GNUNET_SYSERR;
678  }
679 
680  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
681 
682  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
683 
684  if (!message)
685  return GNUNET_YES;
686 
687  if (GNUNET_YES != check_member_session_history(session, hash, GNUNET_YES))
688  {
689  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Unpermitted request for deletion by member (%s) of message (%s)!\n",
690  GNUNET_sh2s(get_member_session_id(session)), GNUNET_h2s(hash));
691 
692  return GNUNET_NO;
693  }
694 
696 
697  if (GNUNET_OK != use_store_operation(operation_store, hash, GNUNET_MESSENGER_OP_DELETE, delay))
698  {
699  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Deletion has failed: operation denied!\n");
700  return GNUNET_SYSERR;
701  }
702 
703  return GNUNET_YES;
704 }
705 
706 struct GNUNET_CADET_Handle*
708 {
709  GNUNET_assert(room);
710 
711  return room->service->cadet;
712 }
713 
714 const struct GNUNET_HashCode*
716 {
717  GNUNET_assert(room);
718 
719  return &(room->key);
720 }
721 
722 const struct GNUNET_MESSENGER_SrvTunnel*
724  const struct GNUNET_PeerIdentity *peer)
725 {
726  GNUNET_assert((room) && (peer));
727 
729 }
730 
731 static int
733  const struct GNUNET_HashCode *hash,
734  const struct GNUNET_MESSENGER_MemberSession *session,
736  void* cls)
737 {
738  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
739 
741  message_store, hash, GNUNET_YES
742  );
743 
744  if (!link)
745  goto forward;
746 
747  int result = request_room_message_step(room, &(link->first), session, callback, cls);
748 
749  if ((GNUNET_YES == link->multiple) &&
750  (GNUNET_YES == request_room_message_step(room, &(link->second), session, callback, cls)))
751  return GNUNET_YES;
752  else
753  return result;
754 
755 forward:
756  if (GNUNET_YES != check_member_session_history(session, hash, GNUNET_NO))
757  return GNUNET_YES;
758 
759  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
760 
761  if (!message)
762  return GNUNET_NO;
763 
764  if (callback)
765  callback (cls, room, message, hash);
766 
767  return GNUNET_YES;
768 }
769 
770 int
772  const struct GNUNET_HashCode *hash,
773  const struct GNUNET_MESSENGER_MemberSession *session,
775  void* cls)
776 {
777  GNUNET_assert((room) && (hash));
778 
779  int result = request_room_message_step (room, hash, session, callback, cls);
780 
781  if ((GNUNET_NO == result) && (callback))
782  callback (cls, room, NULL, hash);
783 
784  return result;
785 }
786 
787 void
789  void *cls)
790 {
791  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
792 
793  if (!room->host)
794  return;
795 
798 
801  return;
802 
805 }
806 
807 int
809  void *cls,
810  struct GNUNET_MESSENGER_Message *message,
811  struct GNUNET_HashCode *hash)
812 {
813  if (GNUNET_MESSENGER_KIND_UNKNOWN == message->header.kind)
814  {
815  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Kind is unknown! (%d)\n", message->header.kind);
816  return GNUNET_SYSERR;
817  }
818 
819  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
820 
821  const struct GNUNET_MESSENGER_Message *previous = get_store_message(message_store, &(message->header.previous));
822 
823  if (!previous)
824  goto skip_time_comparison;
825 
826  struct GNUNET_TIME_Absolute timestamp = GNUNET_TIME_absolute_ntoh(message->header.timestamp);
828 
829  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(timestamp, last).rel_value_us)
830  {
831  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Timestamp does not check out!\n");
832  return GNUNET_SYSERR;
833  }
834 
835 skip_time_comparison:
836  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Receiving message of kind: %s!\n",
838 
839  return GNUNET_OK;
840 }
841 
842 static void
844 {
845  struct GNUNET_MESSENGER_SrvRoom *room = cls;
846 
847  room->idle = NULL;
848 
850  const struct GNUNET_HashCode *hash = get_message_state_merge_hash(&(room->state));
851 
852  if ((hash) &&
853  (GNUNET_MESSENGER_OP_UNKNOWN == get_store_operation_type(operation_store, hash)))
855  operation_store,
856  hash,
859  );
860 
865  cls
866  );
867 }
868 
869 void
871  const struct GNUNET_IDENTITY_PublicKey *public_key,
872  const struct GNUNET_ShortHashCode *member_id,
873  struct GNUNET_TIME_Absolute timestamp)
874 {
875  GNUNET_assert ((room) && (public_key) && (member_id));
876 
878  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, member_id);
879 
880  if ((!member) || (1 >= GNUNET_CONTAINER_multihashmap_size(member->sessions)))
881  return;
882 
883  struct GNUNET_MESSENGER_ListHandles *handles = &(room->service->handles);
884  struct GNUNET_MESSENGER_ListHandle* element;
885 
886  for (element = handles->head; element; element = element->next)
887  {
888  if (0 != GNUNET_memcmp(member_id, get_handle_member_id(element->handle, get_room_key(room))))
889  continue;
890 
891  if (0 == GNUNET_memcmp(public_key, &(get_handle_ego(element->handle)->pub)))
892  continue;
893 
895 
896  if (!session)
897  continue;
898 
900 
901  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(start, timestamp).rel_value_us)
902  continue;
903 
904  struct GNUNET_ShortHashCode random_id;
905  generate_free_member_id (&random_id, member_store->members);
906 
907  send_room_message(room, element->handle, create_message_id(&random_id));
908  }
909 }
910 
911 void
913 {
914  GNUNET_assert(room);
915 
916  struct GNUNET_PeerIdentity peer;
917  size_t src;
918 
919  if ((GNUNET_OK != get_service_peer_identity (room->service, &peer)) ||
920  (!find_list_tunnels (&(room->basement), &peer, &src)))
921  return;
922 
923  size_t count = count_of_tunnels (&(room->basement));
924 
925  struct GNUNET_MESSENGER_ListTunnel *element = room->basement.head;
926  struct GNUNET_MESSENGER_SrvTunnel *tunnel;
927 
928  size_t dst = 0;
929 
930  while (element)
931  {
932  GNUNET_PEER_resolve (element->peer, &peer);
933 
935 
936  if (!tunnel)
937  {
938  element = remove_from_list_tunnels (&(room->basement), element);
939  continue;
940  }
941 
942  if (GNUNET_YES == required_connection_between (count, src, dst))
943  {
944  if (GNUNET_SYSERR == connect_tunnel (tunnel))
945  {
946  element = remove_from_list_tunnels (&(room->basement), element);
947  continue;
948  }
949  }
950  else
951  disconnect_tunnel (tunnel);
952 
953  element = element->next;
954  dst++;
955  }
956 }
957 
958 static void
960 {
961  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
963 
964  while (room->handling.head)
965  {
966  struct GNUNET_MESSENGER_ListMessage *element = room->handling.head;
967 
968  const struct GNUNET_MESSENGER_Message *message = get_store_message (message_store, &(element->hash));
969 
970  if (!message)
971  goto finish_handling;
972 
973  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
974 
975  if (!member)
976  goto finish_handling;
977 
978  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, &(element->hash));
979 
980  if (session)
981  handle_service_message (room->service, room, session, message, &(element->hash));
982 
983 finish_handling:
984  GNUNET_CONTAINER_DLL_remove(room->handling.head, room->handling.tail, element);
985  GNUNET_free(element);
986  }
987 }
988 
989 int
991  struct GNUNET_MESSENGER_Message *message,
992  const struct GNUNET_HashCode *hash)
993 {
994  GNUNET_assert((room) && (message) && (hash));
995 
997 
998  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
1000  );
1001 
1002  if (GNUNET_YES == requested)
1003  cancel_store_operation(operation_store, hash);
1004 
1005  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
1006 
1007  const struct GNUNET_MESSENGER_Message *old_message = get_store_message (message_store, hash);
1008 
1009  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle a message in room (%s).\n", GNUNET_h2s (get_room_key(room)));
1010 
1011  if ((old_message) || (GNUNET_OK != put_store_message (message_store, hash, message)))
1012  {
1013  if (old_message != message)
1014  destroy_message(message);
1015 
1016  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Duplicate message got dropped!\n");
1017  return GNUNET_NO;
1018  }
1019 
1020  update_message_state(&(room->state), requested, message, hash);
1021 
1022  if ((GNUNET_YES == requested) ||
1023  (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
1025  return GNUNET_YES;
1026 
1027  if ((GNUNET_MESSENGER_KIND_MERGE == message->header.kind) &&
1028  (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->body.merge.previous))))
1029  cancel_store_operation(operation_store, &(message->body.merge.previous));
1030 
1031  if (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->header.previous)))
1032  cancel_store_operation(operation_store, &(message->header.previous));
1033 
1034  return GNUNET_YES;
1035 }
1036 
1038 {
1041 
1043 };
1044 
1046 {
1048  const struct GNUNET_HashCode *hash;
1049 
1052 };
1053 
1054 static int
1056  const struct GNUNET_IDENTITY_PublicKey *public_key,
1058 {
1059  struct GNUNET_MESSENGER_MemberUpdate *update = cls;
1060 
1061  update_member_session_history(session, update->message, update->hash);
1062 
1063  if (GNUNET_YES == is_member_session_completed(session))
1064  {
1067  );
1068 
1069  element->session = session;
1070 
1071  GNUNET_CONTAINER_DLL_insert_tail(update->head, update->tail, element);
1072  }
1073 
1074  return GNUNET_YES;
1075 }
1076 
1077 static void
1080 
1081 void
1084  const struct GNUNET_MESSENGER_Message *message,
1085  const struct GNUNET_HashCode *hash)
1086 {
1088  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
1089 
1090  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Callback for message (%s)\n", GNUNET_h2s (hash));
1091 
1092  if (!member)
1093  {
1094  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Member is missing!\n");
1095  return;
1096  }
1097 
1098  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
1099 
1100  if (!session)
1101  {
1102  GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Session is missing!\n");
1103  return;
1104  }
1105 
1106  struct GNUNET_MESSENGER_MemberUpdate update;
1107  update.message = message;
1108  update.hash = hash;
1109 
1110  update.head = NULL;
1111  update.tail = NULL;
1112 
1113  iterate_store_members(member_store, iterate_update_member_sessions, &update);
1114 
1115  while (update.head)
1116  {
1117  struct GNUNET_MESSENGER_MemberSessionCompletion *element = update.head;
1118 
1119  remove_room_member_session (room, element->session);
1120 
1121  GNUNET_CONTAINER_DLL_remove(update.head, update.tail, element);
1122  GNUNET_free (element);
1123  }
1124 
1125  const int start_handle = room->handling.head ? GNUNET_NO : GNUNET_YES;
1126 
1127  add_to_list_messages (&(room->handling), hash);
1128 
1129  switch (message->header.kind)
1130  {
1132  handle_message_join (room, session, message, hash);
1133  break;
1135  handle_message_leave (room, session, message, hash);
1136  break;
1138  handle_message_name (room, session, message, hash);
1139  break;
1141  handle_message_key (room, session, message, hash);
1142  break;
1144  handle_message_peer (room, session, message, hash);
1145  break;
1147  handle_message_id (room, session, message, hash);
1148  break;
1150  handle_message_miss (room, session, message, hash);
1151  break;
1153  handle_message_delete (room, session, message, hash);
1154  break;
1155  default:
1156  break;
1157  }
1158 
1159  if (GNUNET_YES == start_handle)
1160  handle_room_messages (room);
1161 }
1162 
1163 static void
1165  char **dir)
1166 {
1167  GNUNET_assert((room) && (dir));
1168 
1169  GNUNET_asprintf (dir, "%s%s%c%s%c", room->service->dir, "rooms", DIR_SEPARATOR, GNUNET_h2s (get_room_key(room)), DIR_SEPARATOR);
1170 }
1171 
1172 void
1174 {
1175  GNUNET_assert(room);
1176 
1177  char *room_dir;
1178  get_room_data_subdir (room, &room_dir);
1179 
1181  {
1182  load_member_store (get_room_member_store(room), room_dir);
1183  load_message_store (get_room_message_store(room), room_dir);
1185 
1186  char *basement_file;
1187  GNUNET_asprintf (&basement_file, "%s%s", room_dir, "basement.list");
1188 
1189  load_list_tunnels(&(room->basement), basement_file);
1190  GNUNET_free(basement_file);
1191 
1192  char *last_messages_file;
1193  GNUNET_asprintf (&last_messages_file, "%s%s", room_dir, "last_messages.list");
1194 
1195  load_message_state(&(room->state), room_dir);
1196  GNUNET_free (last_messages_file);
1197  }
1198 
1199  GNUNET_free(room_dir);
1200 }
1201 
1202 void
1204 {
1205  GNUNET_assert(room);
1206 
1207  char *room_dir;
1208  get_room_data_subdir (room, &room_dir);
1209 
1210  if ((GNUNET_YES == GNUNET_DISK_directory_test (room_dir, GNUNET_NO)) ||
1211  (GNUNET_OK == GNUNET_DISK_directory_create (room_dir)))
1212  {
1213  save_member_store(get_room_member_store(room), room_dir);
1214  save_message_store (get_room_message_store(room), room_dir);
1216 
1217  char *basement_file;
1218  GNUNET_asprintf (&basement_file, "%s%s", room_dir, "basement.list");
1219 
1220  save_list_tunnels(&(room->basement), basement_file);
1221  GNUNET_free(basement_file);
1222 
1223  save_message_state(&(room->state), room_dir);
1224  }
1225 
1226  GNUNET_free(room_dir);
1227 }
1228 
1229 static void
1232 {
1233  GNUNET_assert ((room) && (session));
1234 
1236 
1237  const struct GNUNET_IDENTITY_PublicKey *public_key = get_member_session_public_key(session);
1238 
1239  struct GNUNET_HashCode hash;
1240  GNUNET_CRYPTO_hash(public_key, sizeof(*public_key), &hash);
1241 
1242  char *room_dir;
1243  get_room_data_subdir (room, &room_dir);
1244 
1245  char* session_dir;
1246  GNUNET_asprintf (
1247  &session_dir, "%s%s%c%s%c%s%c%s%c", room_dir,
1248  "members", DIR_SEPARATOR,
1250  "sessions", DIR_SEPARATOR,
1251  GNUNET_h2s(&hash), DIR_SEPARATOR
1252  );
1253 
1254  GNUNET_free (room_dir);
1255 
1256  GNUNET_DISK_directory_remove(session_dir);
1257  GNUNET_free (session_dir);
1258 
1259  destroy_member_session(session);
1260 }
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static int forward
Search direction: forward.
Definition: gnunet-abd.c:162
static int start
Set if we are to start default services (including ARM).
Definition: gnunet-arm.c:39
static char * dir
Set to the directory where runtime files are stored.
Definition: gnunet-arm.c:89
static uint16_t port
Port number.
Definition: gnunet-bcd.c:83
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
static struct GNUNET_PEERINFO_NotifyContext * notify
Handle to the peerinfo notify service (NULL until we've connected to it).
static struct GNUNET_CONTAINER_MultiPeerMap * map
Handle to the map used to store old latency values for peers.
struct GNUNET_HashCode key
The key used in the DHT.
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
static GstElement * source
Appsrc instance into which we write data for the pipeline.
static char * value
Value of the record to add/remove.
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
static int result
Global testing status.
static struct GNUNET_TIME_Relative delay
When should dkg communication start?
static void destroy_tunnel(void *cls)
This tunnel is no longer used, destroy it.
static struct GNUNET_CADET_Handle * cadet
Handle for cadet.
GNUnet MESSENGER service.
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...
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).
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.
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...
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.
const struct GNUNET_MESSENGER_Ego * get_handle_ego(const struct GNUNET_MESSENGER_SrvHandle *handle)
Returns the EGO used by a given handle.
void init_list_messages(struct GNUNET_MESSENGER_ListMessages *messages)
Initializes list of message hashes as empty list.
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 remove_member_session(struct GNUNET_MESSENGER_Member *member, struct GNUNET_MESSENGER_MemberSession *session)
Removes a given member session from its member.
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.
const struct GNUNET_ShortHashCode * get_member_id(const struct GNUNET_MESSENGER_Member *member)
Returns the current id of a given member.
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...
GNUnet MESSENGER service.
const struct GNUNET_ShortHashCode * get_member_session_id(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the member id of a given member session.
void destroy_member_session(struct GNUNET_MESSENGER_MemberSession *session)
Destroys a member session and frees its memory fully.
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...
struct GNUNET_TIME_Absolute get_member_session_start(const struct GNUNET_MESSENGER_MemberSession *session)
Returns the timestamp of the member session's start.
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.
int is_member_session_completed(const struct GNUNET_MESSENGER_MemberSession *session)
Returns if the given member session has been completed.
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.
int is_member_session_closed(const struct GNUNET_MESSENGER_MemberSession *session)
Returns if the given member session has been closed.
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.
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 ...
void save_member_store(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Saves members from a member store into a directory.
void load_member_store(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Loads members from a directory into a member 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.
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.
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.
void clear_member_store(struct GNUNET_MESSENGER_MemberStore *store)
Clears a member store, wipes its content and deallocates its memory.
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...
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.
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.
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.
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 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.
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.
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.
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...
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...
struct GNUNET_MESSENGER_Message * create_message_miss(const struct GNUNET_PeerIdentity *peer)
Creates and allocates a new miss message containing the missing peer identity.
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.
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_Message * create_message_join(const struct GNUNET_MESSENGER_Ego *ego)
Creates and allocates a new join message containing the clients EGO public key.
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 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.
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.
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.
void save_message_state(const struct GNUNET_MESSENGER_MessageState *state, const char *path)
void update_message_state(struct GNUNET_MESSENGER_MessageState *state, int requested, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void clear_message_state(struct GNUNET_MESSENGER_MessageState *state)
void get_message_state_chain_hash(const struct GNUNET_MESSENGER_MessageState *state, struct GNUNET_HashCode *hash)
void init_message_state(struct GNUNET_MESSENGER_MessageState *state)
void load_message_state(struct GNUNET_MESSENGER_MessageState *state, const char *path)
const struct GNUNET_HashCode * get_message_state_merge_hash(const 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.
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.
void clear_message_store(struct GNUNET_MESSENGER_MessageStore *store)
Clears a message store, wipes its content and deallocates its memory.
void init_message_store(struct GNUNET_MESSENGER_MessageStore *store)
Initializes a message store as fully empty.
int delete_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Deletes a message in the message store.
void load_message_store(struct GNUNET_MESSENGER_MessageStore *store, const char *directory)
Loads messages from a directory into a message store.
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.
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 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 save_operation_store(const struct GNUNET_MESSENGER_OperationStore *store, const char *directory)
Saves operations from an operation store into a directory.
void clear_operation_store(struct GNUNET_MESSENGER_OperationStore *store)
Clears an operation store, stops all operations and deallocates its memory.
void load_operation_store(struct GNUNET_MESSENGER_OperationStore *store, const char *directory)
Loads operations from a directory into an operation store.
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.
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.
static void notify_about_members(struct GNUNET_MESSENGER_MemberNotify *notify, struct GNUNET_MESSENGER_MemberSession *session, struct GNUNET_CONTAINER_MultiHashMap *map, int check_permission)
struct GNUNET_MESSENGER_OperationStore * get_room_operation_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used operation store of a given room.
static int join_room(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Member *member)
static void get_room_data_subdir(struct GNUNET_MESSENGER_SrvRoom *room, char **dir)
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.
static int iterate_notify_about_members(void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key, struct GNUNET_MESSENGER_MemberSession *session)
const struct GNUNET_HashCode * get_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
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...
static void remove_room_member_session(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session)
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...
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.
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.
void handle_tunnel_message(void *cls, const struct GNUNET_MessageHeader *header)
static int send_room_info(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_SrvTunnel *tunnel)
int open_room(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle)
Tries to open a room for a given handle.
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...
static void idle_request_room_messages(void *cls)
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...
static int iterate_destroy_tunnels(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
int callback_verify_room_message(struct GNUNET_MESSENGER_SrvRoom *room, void *cls, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
static int join_room_locally(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle)
static void * callback_room_connect(void *cls, struct GNUNET_CADET_Channel *channel, const struct GNUNET_PeerIdentity *source)
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,...
struct GNUNET_MESSENGER_MessageStore * get_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
static void handle_room_messages(struct GNUNET_MESSENGER_SrvRoom *room)
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)
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.
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 check_tunnel_message(void *cls, const struct GNUNET_MessageHeader *header)
static int iterate_update_member_sessions(void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key, struct GNUNET_MESSENGER_MemberSession *session)
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...
void callback_tunnel_disconnect(void *cls, const struct GNUNET_CADET_Channel *channel)
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.
void destroy_room(struct GNUNET_MESSENGER_SrvRoom *room)
Destroys a room and frees its memory fully.
struct GNUNET_MESSENGER_MemberStore * get_room_member_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used member store of a given room.
int update_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void callback_room_deletion(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash)
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_CADET_Handle * get_room_cadet(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the CADET handle from a rooms service.
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...
void callback_room_disconnect(struct GNUNET_MESSENGER_SrvRoom *room, void *cls)
static int iterate_send_room_message(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
void callback_room_merge(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash)
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...
GNUnet MESSENGER service.
#define GNUNET_MESSENGER_MERGE_DELAY
#define GNUNET_MESSENGER_IDLE_DELAY
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.
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 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.
GNUnet MESSENGER service.
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 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.
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.
int connect_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Tries to connect a tunnel by creating a new CADET channel and binding it.
int is_tunnel_connected(const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Returns the status of a currently bound channel of a tunnel.
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).
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...
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 ...
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.
void disconnect_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Disconnects and unbinds a channel from a tunnel.
GNUnet MESSENGER service.
#define GNUNET_log(kind,...)
@ GNUNET_SCHEDULER_PRIORITY_IDLE
Run when otherwise idle.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_OK
Definition: gnunet_common.h:95
@ GNUNET_YES
Definition: gnunet_common.h:97
@ GNUNET_NO
Definition: gnunet_common.h:94
@ GNUNET_SYSERR
Definition: gnunet_common.h:93
static enum @8 mode
Should we do a PUT (mode = 0) or GET (mode = 1);.
void GNUNET_CADET_close_port(struct GNUNET_CADET_Port *p)
Close a port opened with GNUNET_CADET_open_port().
Definition: cadet_api.c:808
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
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_remove(const char *filename)
Remove all files in a directory (rm -rf).
Definition: disk.c:1085
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
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_create(const char *dir)
Implementation of "mkdir -p".
Definition: disk.c:496
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
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
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).
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
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_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
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.
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
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).
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
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 * 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.
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).
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.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST
, ' bother checking if a value already exists (faster than GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE...
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE
Allow multiple values with the same key.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
@ GNUNET_ERROR_TYPE_INFO
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
#define GNUNET_MESSENGER_VERSION
Version number of GNUnet Messenger API.
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
@ GNUNET_MESSENGER_KIND_INFO
The info kind.
@ GNUNET_MESSENGER_KIND_MISS
The miss kind.
@ GNUNET_MESSENGER_KIND_REQUEST
The request kind.
@ GNUNET_MESSENGER_KIND_NAME
The name kind.
@ GNUNET_MESSENGER_KIND_LEAVE
The leave kind.
@ GNUNET_MESSENGER_KIND_PEER
The peer kind.
@ GNUNET_MESSENGER_KIND_UNKNOWN
The unknown kind.
@ GNUNET_MESSENGER_KIND_KEY
The key kind.
@ GNUNET_MESSENGER_KIND_JOIN
The join kind.
@ GNUNET_MESSENGER_KIND_DELETE
The delete kind.
@ GNUNET_MESSENGER_KIND_MERGE
The merge kind.
@ GNUNET_MESSENGER_KIND_ID
The id kind.
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
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
#define GNUNET_MESSAGE_TYPE_CADET_CLI
Traffic (net-cat style) used by the Command Line Interface.
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_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 * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_zero_(void)
Return relative time of 0ms.
Definition: time.c:100
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:86
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_forever_(void)
Return "forever".
Definition: time.c:163
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:542
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
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:464
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.
void init_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels)
Initializes list of tunnels peer identities as empty list.
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_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...
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...
void clear_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels)
Clears the list of tunnels peer identities.
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_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...
int is_message_session_bound(const struct GNUNET_MESSENGER_Message *message)
Returns if the message should be bound to a member session.
void destroy_message(struct GNUNET_MESSENGER_Message *message)
Destroys a message and frees its memory fully.
#define GNUNET_MESSENGER_PACK_MODE_UNKNOWN
#define GNUNET_MESSENGER_PACK_MODE_ENVELOPE
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...
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.
void delayed_disconnect_channel(struct GNUNET_CADET_Channel *channel)
Starts an urgent task to close a CADET channel asynchronously.
messenger api: client implementation of GNUnet MESSENGER service
#define DIR_SEPARATOR
Definition: platform.h:164
Opaque handle to a channel.
Definition: cadet.h:117
Opaque handle to the service.
Definition: cadet_api.c:39
Internal representation of the hash map.
A 512-bit hashcode.
An identity key as per LSD0001.
struct GNUNET_MESSENGER_SrvHandle * handle
struct GNUNET_MESSENGER_Message * message
struct GNUNET_MESSENGER_SrvTunnel * exclude
struct GNUNET_MESSENGER_SrvRoom * room
struct GNUNET_IDENTITY_PublicKey pub
struct GNUNET_MESSENGER_ListHandle * next
struct GNUNET_MESSENGER_SrvHandle * handle
struct GNUNET_MESSENGER_ListHandle * head
struct GNUNET_MESSENGER_ListMessage * next
struct GNUNET_MESSENGER_ListMessage * head
struct GNUNET_MESSENGER_ListMessage * tail
struct GNUNET_MESSENGER_ListTunnel * next
struct GNUNET_MESSENGER_ListTunnel * head
struct GNUNET_MESSENGER_MemberSession * session
struct GNUNET_MESSENGER_SrvRoom * room
struct GNUNET_MESSENGER_SrvHandle * handle
struct GNUNET_MESSENGER_MemberSessionCompletion * prev
struct GNUNET_MESSENGER_MemberSession * session
struct GNUNET_MESSENGER_MemberSessionCompletion * next
struct GNUNET_MESSENGER_MemberSession * prev
struct GNUNET_MESSENGER_ListMessages messages
struct GNUNET_CONTAINER_MultiShortmap * members
struct GNUNET_MESSENGER_MemberSessionCompletion * head
const struct GNUNET_MESSENGER_Message * message
struct GNUNET_MESSENGER_MemberSessionCompletion * tail
struct GNUNET_CONTAINER_MultiHashMap * sessions
struct GNUNET_MESSENGER_MessageMerge merge
struct GNUNET_HashCode previous
The hash of the previous message from the senders perspective.
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_TIME_AbsoluteNBO timestamp
The timestamp of the message.
struct GNUNET_ShortHashCode sender_id
The senders id inside of the room the message was sent in.
struct GNUNET_HashCode previous
The hash of a second previous message.
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_MessageBody body
Body.
struct GNUNET_CADET_Handle * cadet
struct GNUNET_MESSENGER_ListHandles handles
struct GNUNET_HashCode * peer_message
struct GNUNET_CONTAINER_MultiPeerMap * tunnels
struct GNUNET_MESSENGER_MemberStore member_store
struct GNUNET_MESSENGER_Service * service
struct GNUNET_CADET_Port * port
struct GNUNET_MESSENGER_ListTunnels basement
struct GNUNET_SCHEDULER_Task * idle
struct GNUNET_MESSENGER_MessageStore message_store
struct GNUNET_MESSENGER_MessageState state
struct GNUNET_MESSENGER_ListMessages handling
struct GNUNET_MESSENGER_OperationStore operation_store
struct GNUNET_MESSENGER_SrvHandle * host
struct GNUNET_CADET_Channel * channel
struct GNUNET_MESSENGER_SrvRoom * room
Message handler for a specific message type.
Header for all communications.
The identity of the host (wraps the signing key of the peer).
A 256-bit hashcode.
Time for absolute times used by GNUnet, in microseconds.
Time for relative time used by GNUnet, in microseconds.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.