GNUnet  0.19.2
seti_api.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2012-2016, 2020 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  */
26 #include "platform.h"
27 #include "gnunet_util_lib.h"
28 #include "gnunet_protocols.h"
29 #include "gnunet_seti_service.h"
30 #include "seti.h"
31 
32 
33 #define LOG(kind, ...) GNUNET_log_from (kind, "seti-api", __VA_ARGS__)
34 
35 
40 {
45 
50 
55 
60 
67 
71  int invalid;
72 
77  uint16_t iteration_id;
78 
79 };
80 
81 
86 {
91  uint32_t accept_id;
92 
97  int accepted;
98 };
99 
100 
106 {
112 
116  void *result_cls;
117 
123 
129 
134  uint32_t *request_id_addr;
135 
140 
145 
149  uint32_t request_id;
150 
156 };
157 
158 
163 {
168 
175 
181 
185  void *listen_cls;
186 
191 
195  struct GNUNET_HashCode app_id;
196 
201 
202 };
203 
204 
212 static int
213 check_result (void *cls,
214  const struct GNUNET_SETI_ResultMessage *msg)
215 {
216  /* minimum size was already checked, everything else is OK! */
217  return GNUNET_OK;
218 }
219 
220 
227 static void
228 handle_result (void *cls,
229  const struct GNUNET_SETI_ResultMessage *msg)
230 {
231  struct GNUNET_SETI_Handle *set = cls;
233  struct GNUNET_SETI_Element e;
234  enum GNUNET_SETI_Status result_status;
235  int destroy_set;
236 
237  GNUNET_assert (NULL != set->mq);
238  result_status = (enum GNUNET_SETI_Status) ntohs (msg->result_status);
240  "Got result message with status %d\n",
241  result_status);
242  oh = GNUNET_MQ_assoc_get (set->mq,
243  ntohl (msg->request_id));
244  if (NULL == oh)
245  {
246  /* 'oh' can be NULL if we canceled the operation, but the service
247  did not get the cancel message yet. */
249  "Ignoring result from canceled operation\n");
250  return;
251  }
252 
253  switch (result_status)
254  {
257  e.data = &msg[1];
258  e.size = ntohs (msg->header.size)
259  - sizeof(struct GNUNET_SETI_ResultMessage);
260  e.element_type = ntohs (msg->element_type);
261  if (NULL != oh->result_cb)
262  oh->result_cb (oh->result_cls,
263  &e,
264  GNUNET_ntohll (msg->current_size),
265  result_status);
266  return;
270  ntohl (msg->request_id));
272  set->ops_tail,
273  oh);
274  /* Need to do this calculation _before_ the result callback,
275  as IF the application still has a valid set handle, it
276  may trigger destruction of the set during the callback. */
277  destroy_set = (GNUNET_YES == set->destroy_requested) &&
278  (NULL == set->ops_head);
279  if (NULL != oh->result_cb)
280  {
281  oh->result_cb (oh->result_cls,
282  NULL,
283  GNUNET_ntohll (msg->current_size),
284  result_status);
285  }
286  else
287  {
289  "No callback for final status\n");
290  }
291  if (destroy_set)
292  GNUNET_SETI_destroy (set);
293  GNUNET_free (oh);
294  return;
295  }
296 }
297 
298 
304 static void
306 {
307  struct GNUNET_SETI_Handle *set = oh->set;
308  struct GNUNET_SETI_OperationHandle *h_assoc;
309 
310  if (NULL != oh->conclude_mqm)
311  GNUNET_MQ_discard (oh->conclude_mqm);
312  /* is the operation already committed? */
313  if (NULL != set)
314  {
316  set->ops_tail,
317  oh);
318  h_assoc = GNUNET_MQ_assoc_remove (set->mq,
319  oh->request_id);
320  GNUNET_assert ((NULL == h_assoc) ||
321  (h_assoc == oh));
322  }
323  GNUNET_free (oh);
324 }
325 
326 
334 void
336 {
337  struct GNUNET_SETI_Handle *set = oh->set;
339  struct GNUNET_MQ_Envelope *mqm;
340 
342  "Cancelling SET operation\n");
343  if (NULL != set)
344  {
346  m->request_id = htonl (oh->request_id);
347  GNUNET_MQ_send (set->mq, mqm);
348  }
350  if ((NULL != set) &&
351  (GNUNET_YES == set->destroy_requested) &&
352  (NULL == set->ops_head))
353  {
355  "Destroying set after operation cancel\n");
356  GNUNET_SETI_destroy (set);
357  }
358 }
359 
360 
368 static void
370  enum GNUNET_MQ_Error error)
371 {
372  struct GNUNET_SETI_Handle *set = cls;
373 
375  "Handling client set error %d\n",
376  error);
377  while (NULL != set->ops_head)
378  {
379  if ((NULL != set->ops_head->result_cb) &&
380  (GNUNET_NO == set->destroy_requested))
381  set->ops_head->result_cb (set->ops_head->result_cls,
382  NULL,
383  0,
386  }
387  set->invalid = GNUNET_YES;
388 }
389 
390 
398 struct GNUNET_SETI_Handle *
400 {
401  struct GNUNET_SETI_Handle *set = GNUNET_new (struct GNUNET_SETI_Handle);
402  struct GNUNET_MQ_MessageHandler mq_handlers[] = {
406  set),
408  };
409  struct GNUNET_MQ_Envelope *mqm;
410  struct GNUNET_SETI_CreateMessage *create_msg;
411 
412  set->cfg = cfg;
413  set->mq = GNUNET_CLIENT_connect (cfg,
414  "seti",
415  mq_handlers,
417  set);
418  if (NULL == set->mq)
419  {
420  GNUNET_free (set);
421  return NULL;
422  }
424  "Creating new intersection set\n");
425  mqm = GNUNET_MQ_msg (create_msg,
427  GNUNET_MQ_send (set->mq,
428  mqm);
429  return set;
430 }
431 
432 
446 int
448  const struct GNUNET_SETI_Element *element,
450  void *cb_cls)
451 {
452  struct GNUNET_MQ_Envelope *mqm;
454 
456  "adding element of type %u to set %p\n",
457  (unsigned int) element->element_type,
458  set);
459  if (GNUNET_YES == set->invalid)
460  {
461  if (NULL != cb)
462  cb (cb_cls);
463  return GNUNET_SYSERR;
464  }
465  mqm = GNUNET_MQ_msg_extra (msg,
466  element->size,
468  msg->element_type = htons (element->element_type);
469  GNUNET_memcpy (&msg[1],
470  element->data,
471  element->size);
473  cb,
474  cb_cls);
475  GNUNET_MQ_send (set->mq,
476  mqm);
477  return GNUNET_OK;
478 }
479 
480 
487 void
489 {
490  /* destroying set while iterator is active is currently
491  not supported; we should expand the API to allow
492  clients to explicitly cancel the iteration! */
493  if ((NULL != set->ops_head) ||
495  {
497  "Set operations are pending, delaying set destruction\n");
499  return;
500  }
502  "Really destroying set\n");
503  if (NULL != set->mq)
504  {
505  GNUNET_MQ_destroy (set->mq);
506  set->mq = NULL;
507  }
508  GNUNET_free (set);
509 }
510 
511 
513 GNUNET_SETI_prepare (const struct GNUNET_PeerIdentity *other_peer,
514  const struct GNUNET_HashCode *app_id,
515  const struct GNUNET_MessageHeader *context_msg,
516  const struct GNUNET_SETI_Option options[],
518  void *result_cls)
519 {
520  struct GNUNET_MQ_Envelope *mqm;
523 
525  oh->result_cb = result_cb;
526  oh->result_cls = result_cls;
529  context_msg);
530  msg->app_id = *app_id;
531  msg->target_peer = *other_peer;
532  for (const struct GNUNET_SETI_Option *opt = options;
533  GNUNET_SETI_OPTION_END != opt->type;
534  opt++)
535  {
536  switch (opt->type)
537  {
539  msg->return_intersection = htonl (GNUNET_YES);
540  break;
541  default:
543  "Option with type %d not recognized\n",
544  (int) opt->type);
545  }
546  }
547  oh->conclude_mqm = mqm;
548  oh->request_id_addr = &msg->request_id;
549  return oh;
550 }
551 
552 
558 static void
559 listen_connect (void *cls);
560 
561 
569 static int
570 check_request (void *cls,
571  const struct GNUNET_SETI_RequestMessage *msg)
572 {
573  const struct GNUNET_MessageHeader *context_msg;
574 
575  if (ntohs (msg->header.size) == sizeof(*msg))
576  return GNUNET_OK; /* no context message is OK */
577  context_msg = GNUNET_MQ_extract_nested_mh (msg);
578  if (NULL == context_msg)
579  {
580  /* malformed context message is NOT ok */
581  GNUNET_break_op (0);
582  return GNUNET_SYSERR;
583  }
584  return GNUNET_OK;
585 }
586 
587 
594 static void
595 handle_request (void *cls,
596  const struct GNUNET_SETI_RequestMessage *msg)
597 {
598  struct GNUNET_SETI_ListenHandle *lh = cls;
599  struct GNUNET_SETI_Request req;
600  const struct GNUNET_MessageHeader *context_msg;
601  struct GNUNET_MQ_Envelope *mqm;
602  struct GNUNET_SETI_RejectMessage *rmsg;
603 
605  "Processing incoming operation request with id %u\n",
606  ntohl (msg->accept_id));
607  /* we got another valid request => reset the backoff */
609  req.accept_id = ntohl (msg->accept_id);
610  req.accepted = GNUNET_NO;
611  context_msg = GNUNET_MQ_extract_nested_mh (msg);
612  /* calling #GNUNET_SETI_accept() in the listen cb will set req->accepted */
613  lh->listen_cb (lh->listen_cls,
614  &msg->peer_id,
615  context_msg,
616  &req);
617  if (GNUNET_YES == req.accepted)
618  return; /* the accept-case is handled in #GNUNET_SETI_accept() */
620  "Rejected request %u\n",
621  ntohl (msg->accept_id));
622  mqm = GNUNET_MQ_msg (rmsg,
624  rmsg->accept_reject_id = msg->accept_id;
625  GNUNET_MQ_send (lh->mq,
626  mqm);
627 }
628 
629 
637 static void
639  enum GNUNET_MQ_Error error)
640 {
641  struct GNUNET_SETI_ListenHandle *lh = cls;
642 
644  "Listener broke down (%d), re-connecting\n",
645  (int) error);
646  GNUNET_MQ_destroy (lh->mq);
647  lh->mq = NULL;
650  lh);
652 }
653 
654 
660 static void
661 listen_connect (void *cls)
662 {
663  struct GNUNET_SETI_ListenHandle *lh = cls;
664  struct GNUNET_MQ_MessageHandler mq_handlers[] = {
668  lh),
670  };
671  struct GNUNET_MQ_Envelope *mqm;
673 
674  lh->reconnect_task = NULL;
675  GNUNET_assert (NULL == lh->mq);
676  lh->mq = GNUNET_CLIENT_connect (lh->cfg,
677  "seti",
678  mq_handlers,
680  lh);
681  if (NULL == lh->mq)
682  return;
684  msg->app_id = lh->app_id;
685  GNUNET_MQ_send (lh->mq,
686  mqm);
687 }
688 
689 
703  const struct GNUNET_HashCode *app_id,
705  void *listen_cls)
706 {
707  struct GNUNET_SETI_ListenHandle *lh;
708 
710  "Starting listener for app %s\n",
711  GNUNET_h2s (app_id));
712  lh = GNUNET_new (struct GNUNET_SETI_ListenHandle);
713  lh->listen_cb = listen_cb;
714  lh->listen_cls = listen_cls;
715  lh->cfg = cfg;
716  lh->app_id = *app_id;
718  listen_connect (lh);
719  if (NULL == lh->mq)
720  {
721  GNUNET_free (lh);
722  return NULL;
723  }
724  return lh;
725 }
726 
727 
733 void
735 {
737  "Canceling listener %s\n",
738  GNUNET_h2s (&lh->app_id));
739  if (NULL != lh->mq)
740  {
741  GNUNET_MQ_destroy (lh->mq);
742  lh->mq = NULL;
743  }
744  if (NULL != lh->reconnect_task)
745  {
747  lh->reconnect_task = NULL;
748  }
749  GNUNET_free (lh);
750 }
751 
752 
755  const struct GNUNET_SETI_Option options[],
757  void *result_cls)
758 {
759  struct GNUNET_MQ_Envelope *mqm;
762 
763  GNUNET_assert (GNUNET_NO == request->accepted);
765  "Client accepts set intersection operation with id %u\n",
766  request->accept_id);
767  request->accepted = GNUNET_YES;
768  mqm = GNUNET_MQ_msg (msg,
770  msg->accept_reject_id = htonl (request->accept_id);
772  oh->result_cb = result_cb;
773  oh->result_cls = result_cls;
774  oh->conclude_mqm = mqm;
775  oh->request_id_addr = &msg->request_id;
776  for (const struct GNUNET_SETI_Option *opt = options;
777  GNUNET_SETI_OPTION_END != opt->type;
778  opt++)
779  {
780  switch (opt->type)
781  {
783  oh->return_intersection = GNUNET_YES;
784  msg->return_intersection = htonl (GNUNET_YES);
785  break;
786  default:
788  "Option with type %d not recognized\n",
789  (int) opt->type);
790  }
791  }
792  return oh;
793 }
794 
795 
809 int
811  struct GNUNET_SETI_Handle *set)
812 {
813  if (NULL != oh->set)
814  {
815  /* Some other set was already committed for this
816  * operation, there is a logic bug in the client of this API */
817  GNUNET_break (0);
818  return GNUNET_OK;
819  }
820  GNUNET_assert (NULL != set);
821  if (GNUNET_YES == set->invalid)
822  return GNUNET_SYSERR;
824  "Client commits to SET\n");
825  GNUNET_assert (NULL != oh->conclude_mqm);
826  oh->set = set;
828  set->ops_tail,
829  oh);
830  oh->request_id = GNUNET_MQ_assoc_add (set->mq,
831  oh);
832  *oh->request_id_addr = htonl (oh->request_id);
833  GNUNET_MQ_send (set->mq,
834  oh->conclude_mqm);
835  oh->conclude_mqm = NULL;
836  oh->request_id_addr = NULL;
837  return GNUNET_OK;
838 }
839 
840 
848 void
850  struct GNUNET_HashCode *ret_hash)
851 {
853 
854  /* It's not guaranteed that the element data is always after the element header,
855  so we need to hash the chunks separately. */
857  &element->size,
858  sizeof(uint16_t));
860  &element->element_type,
861  sizeof(uint16_t));
863  element->data,
864  element->size);
866  ret_hash);
867 }
868 
869 
870 /* end of seti_api.c */
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:104
static struct Experiment * e
static void listen_cb(void *cls)
We have been notified that our listen socket has something to read.
static struct GNUNET_TRANSPORT_OfferHelloHandle * oh
Active HELLO offering to transport service.
static int result
Global testing status.
static struct GNUNET_HashCode app_id
static struct GNUNET_VPN_RedirectionRequest * request
Opaque redirection request handle.
Definition: gnunet-vpn.c:40
static struct GNUNET_DNSSTUB_Context * ctx
Context for DNS resolution.
Constants for network protocols.
Two-peer set intersection operations.
struct GNUNET_MQ_Handle * GNUNET_CLIENT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *service_name, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *error_handler_cls)
Create a message queue to connect to a GNUnet service.
Definition: client.c:1057
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
#define GNUNET_log(kind,...)
struct GNUNET_HashContext * GNUNET_CRYPTO_hash_context_start(void)
Start incremental hashing operation.
Definition: crypto_hash.c:349
void GNUNET_CRYPTO_hash_context_read(struct GNUNET_HashContext *hc, const void *buf, size_t size)
Add data to be hashed.
Definition: crypto_hash.c:365
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:54
void GNUNET_CRYPTO_hash_context_finish(struct GNUNET_HashContext *hc, struct GNUNET_HashCode *r_hash)
Finish the hash computation.
Definition: crypto_hash.c:389
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_OK
@ GNUNET_YES
@ GNUNET_NO
@ GNUNET_SYSERR
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
GNUNET_MQ_Error
Error codes for the queue.
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:304
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
void GNUNET_MQ_discard(struct GNUNET_MQ_Envelope *mqm)
Discard the message queue message, free all allocated resources.
Definition: mq.c:285
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct.
Definition: gnunet_mq_lib.h:62
#define GNUNET_MQ_msg_nested_mh(mvar, type, mh)
Allocate a GNUNET_MQ_Envelope, and append a payload message after the given message struct.
void * GNUNET_MQ_assoc_remove(struct GNUNET_MQ_Handle *mq, uint32_t request_id)
Remove the association for a request_id.
Definition: mq.c:622
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:77
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
void GNUNET_MQ_notify_sent(struct GNUNET_MQ_Envelope *ev, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Call a callback once the envelope has been sent, that is, sending it can not be canceled anymore.
Definition: mq.c:638
uint32_t GNUNET_MQ_assoc_add(struct GNUNET_MQ_Handle *mq, void *assoc_data)
Associate the assoc_data in mq with a unique request id.
Definition: mq.c:575
void * GNUNET_MQ_assoc_get(struct GNUNET_MQ_Handle *mq, uint32_t request_id)
Get the data associated with a request_id in a queue.
Definition: mq.c:604
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:683
#define GNUNET_MQ_extract_nested_mh(var)
Return a pointer to the message at the end of the given message.
#define GNUNET_MESSAGE_TYPE_SETI_LISTEN
Listen for operation requests.
#define GNUNET_MESSAGE_TYPE_SETI_REJECT
Reject a set request.
#define GNUNET_MESSAGE_TYPE_SETI_EVALUATE
Evaluate a set operation.
#define GNUNET_MESSAGE_TYPE_SETI_ADD
Add element to set.
#define GNUNET_MESSAGE_TYPE_SETI_RESULT
Handle result message from operation.
#define GNUNET_MESSAGE_TYPE_SETI_REQUEST
Notify the client of an incoming request from a remote peer.
#define GNUNET_MESSAGE_TYPE_SETI_CREATE
Create a new local set.
#define GNUNET_MESSAGE_TYPE_SETI_CANCEL
Cancel a set operation.
#define GNUNET_MESSAGE_TYPE_SETI_ACCEPT
Accept an incoming set request.
void(* GNUNET_SCHEDULER_TaskCallback)(void *cls)
Signature of the main function of a task.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:944
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1241
GNUNET_SETI_Status
Status for the result callback.
struct GNUNET_SETI_OperationHandle * GNUNET_SETI_accept(struct GNUNET_SETI_Request *request, const struct GNUNET_SETI_Option options[], GNUNET_SETI_ResultIterator result_cb, void *result_cls)
Accept a request we got via GNUNET_SETI_listen().
Definition: seti_api.c:754
void GNUNET_SETI_destroy(struct GNUNET_SETI_Handle *set)
Destroy the set handle if no operations are left, mark the set for destruction otherwise.
Definition: seti_api.c:488
struct GNUNET_SETI_Handle * GNUNET_SETI_create(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create an empty set.
Definition: seti_api.c:399
int GNUNET_SETI_add_element(struct GNUNET_SETI_Handle *set, const struct GNUNET_SETI_Element *element, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Add an element to the given set.
Definition: seti_api.c:447
int GNUNET_SETI_commit(struct GNUNET_SETI_OperationHandle *oh, struct GNUNET_SETI_Handle *set)
Commit a set to be used with a set operation.
Definition: seti_api.c:810
void GNUNET_SETI_element_hash(const struct GNUNET_SETI_Element *element, struct GNUNET_HashCode *ret_hash)
Hash a set element.
Definition: seti_api.c:849
void(* GNUNET_SETI_ListenCallback)(void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SETI_Request *request)
Called when another peer wants to do a set operation with the local peer.
void GNUNET_SETI_operation_cancel(struct GNUNET_SETI_OperationHandle *oh)
Cancel the given set operation.
Definition: seti_api.c:335
void(* GNUNET_SETI_ResultIterator)(void *cls, const struct GNUNET_SETI_Element *element, uint64_t current_size, enum GNUNET_SETI_Status status)
Callback for set union operation results.
struct GNUNET_SETI_ListenHandle * GNUNET_SETI_listen(const struct GNUNET_CONFIGURATION_Handle *cfg, const struct GNUNET_HashCode *app_id, GNUNET_SETI_ListenCallback listen_cb, void *listen_cls)
Wait for set operation requests for the given application id.
Definition: seti_api.c:702
void GNUNET_SETI_listen_cancel(struct GNUNET_SETI_ListenHandle *lh)
Cancel the given listen operation.
Definition: seti_api.c:734
struct GNUNET_SETI_OperationHandle * GNUNET_SETI_prepare(const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_HashCode *app_id, const struct GNUNET_MessageHeader *context_msg, const struct GNUNET_SETI_Option options[], GNUNET_SETI_ResultIterator result_cb, void *result_cls)
Prepare a set operation to be evaluated with another peer.
Definition: seti_api.c:513
@ GNUNET_SETI_STATUS_DONE
Success, all elements have been sent (and received).
@ GNUNET_SETI_STATUS_ADD_LOCAL
Element should be added to the result set of the local peer, i.e.
@ GNUNET_SETI_STATUS_FAILURE
The other peer refused to do the operation with us, or something went wrong.
@ GNUNET_SETI_STATUS_DEL_LOCAL
Element should be delete from the result set of the local peer, i.e.
@ GNUNET_SETI_OPTION_RETURN_INTERSECTION
Return the elements remaining in the intersection (GNUNET_SETI_STATUS_ADD_LOCAL).
@ GNUNET_SETI_OPTION_END
List terminator.
#define GNUNET_TIME_UNIT_MILLISECONDS
One millisecond.
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
static int check_result(void *cls, const struct GNUNET_SETI_ResultMessage *msg)
Check that the given msg is well-formed.
Definition: seti_api.c:213
static void handle_client_listener_error(void *cls, enum GNUNET_MQ_Error error)
Our connection with the set service encountered an error, re-initialize with exponential back-off.
Definition: seti_api.c:638
static void handle_result(void *cls, const struct GNUNET_SETI_ResultMessage *msg)
Handle result message for a set operation.
Definition: seti_api.c:228
static void handle_request(void *cls, const struct GNUNET_SETI_RequestMessage *msg)
Handle request message for a listen operation.
Definition: seti_api.c:595
static int check_request(void *cls, const struct GNUNET_SETI_RequestMessage *msg)
Check validity of request message for a listen operation.
Definition: seti_api.c:570
static void handle_client_set_error(void *cls, enum GNUNET_MQ_Error error)
We encountered an error communicating with the set service while performing a set operation.
Definition: seti_api.c:369
static void listen_connect(void *cls)
Connect to the set service in order to listen for requests.
Definition: seti_api.c:661
static void set_operation_destroy(struct GNUNET_SETI_OperationHandle *oh)
Destroy the given set operation.
Definition: seti_api.c:305
#define LOG(kind,...)
Definition: seti_api.c:33
A 512-bit hashcode.
Handle to a message queue.
Definition: mq.c:87
Message handler for a specific message type.
Header for all communications.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
The identity of the host (wraps the signing key of the peer).
Entry in list of pending tasks.
Definition: scheduler.c:136
Message sent by a listening client to the service to accept performing the operation with the other p...
Definition: seti.h:77
Sent to the service by the client in order to cancel a set operation.
Definition: seti.h:252
Message sent by the client to the service to ask starting a new set to perform operations with.
Definition: seti.h:40
Message sent by client to the service to add an element to the set.
Definition: seti.h:227
Element stored in a set.
const void * data
Actual data of the element.
uint16_t element_type
Application-specific element type.
uint16_t size
Number of bytes in the buffer pointed to by data.
Message sent by client to service to initiate a set operation as a client (not as listener).
Definition: seti.h:152
Opaque handle to a set.
Definition: seti_api.c:40
struct GNUNET_MQ_Handle * mq
Message queue for client.
Definition: seti_api.c:44
struct GNUNET_SETI_OperationHandle * ops_head
Linked list of operations on the set.
Definition: seti_api.c:49
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration, needed when creating (lazy) copies.
Definition: seti_api.c:59
uint16_t iteration_id
Both client and service count the number of iterators created so far to match replies with iterators.
Definition: seti_api.c:77
struct GNUNET_SETI_OperationHandle * ops_tail
Linked list of operations on the set.
Definition: seti_api.c:54
int destroy_requested
Should the set be destroyed once all operations are gone? GNUNET_SYSERR if GNUNET_SETI_destroy() must...
Definition: seti_api.c:66
int invalid
Has the set become invalid (e.g.
Definition: seti_api.c:71
Opaque handle to a listen operation.
Definition: seti_api.c:163
struct GNUNET_HashCode app_id
Application ID we listen for.
Definition: seti_api.c:195
struct GNUNET_TIME_Relative reconnect_backoff
Time to wait until we try to reconnect on failure.
Definition: seti_api.c:200
GNUNET_SETI_ListenCallback listen_cb
Function to call on a new incoming request, or on error.
Definition: seti_api.c:180
struct GNUNET_MQ_Handle * mq
Message queue for the client.
Definition: seti_api.c:167
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration handle for the listener, stored here to be able to reconnect transparently on connectio...
Definition: seti_api.c:174
struct GNUNET_SCHEDULER_Task * reconnect_task
Task for reconnecting when the listener fails.
Definition: seti_api.c:190
void * listen_cls
Closure for listen_cb.
Definition: seti_api.c:185
Message sent by the client to the service to start listening for incoming requests to perform a certa...
Definition: seti.h:54
Handle to an operation.
Definition: seti_api.c:106
void * result_cls
Closure for result_cb.
Definition: seti_api.c:116
struct GNUNET_SETI_OperationHandle * prev
Handles are kept in a linked list.
Definition: seti_api.c:139
uint32_t request_id
Request ID to identify the operation within the set.
Definition: seti_api.c:149
struct GNUNET_SETI_Handle * set
Local set used for the operation, NULL if no set has been provided by conclude yet.
Definition: seti_api.c:122
GNUNET_SETI_ResultIterator result_cb
Function to be called when we have a result, or an error.
Definition: seti_api.c:111
struct GNUNET_SETI_OperationHandle * next
Handles are kept in a linked list.
Definition: seti_api.c:144
uint32_t * request_id_addr
Address of the request if in the conclude message, used to patch the request id into the message when...
Definition: seti_api.c:134
struct GNUNET_MQ_Envelope * conclude_mqm
Message sent to the server on calling conclude, NULL if conclude has been called.
Definition: seti_api.c:128
int return_intersection
Should we return the resulting intersection (ADD) or the elements to remove (DEL)?
Definition: seti_api.c:155
Option for set operations.
Message sent by a listening client to the service to reject performing the operation with the other p...
Definition: seti.h:107
uint32_t accept_reject_id
ID of the incoming request we want to reject.
Definition: seti.h:116
A request for an operation with another client.
Definition: seti.h:124
Handle for a set operation request from another peer.
Definition: seti_api.c:86
uint32_t accept_id
Id of the request, used to identify the request when accepting/rejecting it.
Definition: seti_api.c:91
int accepted
Has the request been accepted already? GNUNET_YES/GNUNET_NO.
Definition: seti_api.c:97
Message sent by the service to the client to indicate an element that is removed (set intersection) o...
Definition: seti.h:192
uint16_t result_status
Was the evaluation successful? Contains an enum GNUNET_SETI_Status in NBO.
Definition: seti.h:212
Time for relative time used by GNUnet, in microseconds.