GNUnet  0.11.x
core_api.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2009-2016 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_constants.h"
29 #include "gnunet_core_service.h"
30 #include "core.h"
31 
32 #define LOG(kind, ...) GNUNET_log_from (kind, "core-api", __VA_ARGS__)
33 
34 
38 struct PeerRecord
39 {
44 
49 
55 
60  void *client_cls;
61 
66 
70  uint16_t smr_id_gen;
71 };
72 
73 
78 {
83 
87  void *cls;
88 
93 
98 
103 
108 
113 
119 
124 
129 
133  struct GNUNET_TIME_Relative retry_backoff;
134 
138  unsigned int hcnt;
139 
144 };
145 
146 
153 static void
154 reconnect (struct GNUNET_CORE_Handle *h);
155 
156 
163 static void
164 reconnect_task (void *cls)
165 {
166  struct GNUNET_CORE_Handle *h = cls;
167 
168  h->reconnect_task = NULL;
169  LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to CORE service after delay\n");
170  reconnect (h);
171 }
172 
173 
183 static int
185  const struct GNUNET_PeerIdentity *key,
186  void *value)
187 {
188  struct GNUNET_CORE_Handle *h = cls;
189  struct PeerRecord *pr = value;
190 
191  GNUNET_assert (pr->h == h);
192  if (NULL != h->disconnects)
193  h->disconnects (h->cls, &pr->peer, pr->client_cls);
196  GNUNET_MQ_destroy (pr->mq);
197  GNUNET_assert (NULL == pr->mq);
198  if (NULL != pr->env)
199  {
200  GNUNET_MQ_discard (pr->env);
201  pr->env = NULL;
202  }
203  GNUNET_free (pr);
204  return GNUNET_YES;
205 }
206 
207 
214 static void
216 {
217  GNUNET_assert (NULL == h->reconnect_task);
218  if (NULL != h->mq)
219  {
220  GNUNET_MQ_destroy (h->mq);
221  h->mq = NULL;
222  }
223  GNUNET_assert (NULL == h->reconnect_task);
224  h->reconnect_task =
228  h);
230 }
231 
232 
240 static void
241 handle_mq_error (void *cls, enum GNUNET_MQ_Error error)
242 {
243  struct GNUNET_CORE_Handle *h = cls;
244 
245  LOG (GNUNET_ERROR_TYPE_DEBUG, "MQ ERROR: %d\n", error);
246  reconnect_later (h);
247 }
248 
249 
258 static void
260  const struct GNUNET_MessageHeader *msg,
261  void *impl_state)
262 {
263  struct PeerRecord *pr = impl_state;
264  struct GNUNET_CORE_Handle *h = pr->h;
265  struct SendMessageRequest *smr;
266  struct SendMessage *sm;
267  struct GNUNET_MQ_Envelope *env;
268  uint16_t msize;
270 
271  if (NULL == h->mq)
272  {
273  /* We're currently reconnecting, pretend this worked */
275  return;
276  }
277  GNUNET_assert (NULL == pr->env);
278  /* extract options from envelope */
280  flags = GNUNET_MQ_env_get_options (env);
281 
282  /* check message size for sanity */
283  msize = ntohs (msg->size);
284  if (msize >= GNUNET_MAX_MESSAGE_SIZE - sizeof(struct SendMessage))
285  {
286  GNUNET_break (0);
288  return;
289  }
290 
291  /* ask core for transmission */
293  "Asking core for transmission of %u bytes to `%s'\n",
294  (unsigned int) msize,
295  GNUNET_i2s (&pr->peer));
297  smr->priority = htonl ((uint32_t) flags);
298  smr->peer = pr->peer;
299  smr->size = htons (msize);
300  smr->smr_id = htons (++pr->smr_id_gen);
301  GNUNET_MQ_send (h->mq, env);
302 
303  /* prepare message with actual transmission data */
305  sm->priority = htonl ((uint32_t) flags);
306  sm->peer = pr->peer;
308  "Calling get_message with buffer of %u bytes\n",
309  (unsigned int) msize);
310 }
311 
312 
320 static void
321 core_mq_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
322 {
323  struct PeerRecord *pr = impl_state;
324 
325  GNUNET_assert (mq == pr->mq);
326  pr->mq = NULL;
327 }
328 
329 
337 static void
338 core_mq_cancel_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
339 {
340  struct PeerRecord *pr = impl_state;
341 
342  (void) mq;
343  GNUNET_assert (NULL != pr->env);
344  GNUNET_MQ_discard (pr->env);
345  pr->env = NULL;
346 }
347 
348 
357 static void
358 core_mq_error_handler (void *cls, enum GNUNET_MQ_Error error)
359 {
360  /* struct PeerRecord *pr = cls; */
361  (void) cls;
362  (void) error;
363  GNUNET_break_op (0);
364 }
365 
366 
375 static void
377  const struct GNUNET_PeerIdentity *peer)
378 {
379  struct PeerRecord *pr;
380 
381  pr = GNUNET_new (struct PeerRecord);
382  pr->peer = *peer;
383  pr->h = h;
386  h->peers,
387  &pr->peer,
388  pr,
393  pr,
394  h->handlers,
396  pr);
397  if (NULL != h->connects)
398  {
399  pr->client_cls = h->connects (h->cls, &pr->peer, pr->mq);
401  }
402 }
403 
404 
413 static void
414 handle_init_reply (void *cls, const struct InitReplyMessage *m)
415 {
416  struct GNUNET_CORE_Handle *h = cls;
418 
419  GNUNET_break (0 == ntohl (m->reserved));
421  if (NULL != (init = h->init))
422  {
423  /* mark so we don't call init on reconnect */
424  h->init = NULL;
425  h->me = m->my_identity;
427  "Connected to core service of peer `%s'.\n",
428  GNUNET_i2s (&h->me));
429  h->have_init = GNUNET_YES;
430  init (h->cls, &h->me);
431  }
432  else
433  {
435  "Successfully reconnected to core service.\n");
436  if (GNUNET_NO == h->have_init)
437  {
438  h->me = m->my_identity;
439  h->have_init = GNUNET_YES;
440  }
441  else
442  {
443  GNUNET_break (0 == memcmp (&h->me,
444  &m->my_identity,
445  sizeof(struct GNUNET_PeerIdentity)));
446  }
447  }
448  /* fake 'connect to self' */
449  connect_peer (h, &h->me);
450 }
451 
452 
460 static void
462 {
463  struct GNUNET_CORE_Handle *h = cls;
464  struct PeerRecord *pr;
465 
467  "Received notification about connection from `%s'.\n",
468  GNUNET_i2s (&cnm->peer));
469  if (0 == memcmp (&h->me, &cnm->peer, sizeof(struct GNUNET_PeerIdentity)))
470  {
471  /* connect to self!? */
472  GNUNET_break (0);
473  return;
474  }
476  if (NULL != pr)
477  {
478  GNUNET_break (0);
479  reconnect_later (h);
480  return;
481  }
482  connect_peer (h, &cnm->peer);
483 }
484 
485 
493 static void
494 handle_disconnect_notify (void *cls, const struct DisconnectNotifyMessage *dnm)
495 {
496  struct GNUNET_CORE_Handle *h = cls;
497  struct PeerRecord *pr;
498 
499  if (0 == memcmp (&h->me, &dnm->peer, sizeof(struct GNUNET_PeerIdentity)))
500  {
501  /* disconnect from self!? */
502  GNUNET_break (0);
503  return;
504  }
505  GNUNET_break (0 == ntohl (dnm->reserved));
507  "Received notification about disconnect from `%s'.\n",
508  GNUNET_i2s (&dnm->peer));
510  if (NULL == pr)
511  {
512  GNUNET_break (0);
513  reconnect_later (h);
514  return;
515  }
516  disconnect_and_free_peer_entry (h, &pr->peer, pr);
517 }
518 
519 
527 static int
528 check_notify_inbound (void *cls, const struct NotifyTrafficMessage *ntm)
529 {
530  uint16_t msize;
531  const struct GNUNET_MessageHeader *em;
532 
533  (void) cls;
534  msize = ntohs (ntm->header.size) - sizeof(struct NotifyTrafficMessage);
535  if (msize < sizeof(struct GNUNET_MessageHeader))
536  {
537  GNUNET_break (0);
538  return GNUNET_SYSERR;
539  }
540  em = (const struct GNUNET_MessageHeader *) &ntm[1];
541  if (msize != ntohs (em->size))
542  {
543  GNUNET_break (0);
544  return GNUNET_SYSERR;
545  }
546  return GNUNET_OK;
547 }
548 
549 
557 static void
558 handle_notify_inbound (void *cls, const struct NotifyTrafficMessage *ntm)
559 {
560  struct GNUNET_CORE_Handle *h = cls;
561  const struct GNUNET_MessageHeader *em;
562  struct PeerRecord *pr;
563 
565  "Received inbound message from `%s'.\n",
566  GNUNET_i2s (&ntm->peer));
567  em = (const struct GNUNET_MessageHeader *) &ntm[1];
569  if (NULL == pr)
570  {
571  GNUNET_break (0);
572  reconnect_later (h);
573  return;
574  }
575  GNUNET_MQ_inject_message (pr->mq, em);
576 }
577 
578 
587 static void
588 handle_send_ready (void *cls, const struct SendMessageReady *smr)
589 {
590  struct GNUNET_CORE_Handle *h = cls;
591  struct PeerRecord *pr;
592 
594  if (NULL == pr)
595  {
596  GNUNET_break (0);
597  reconnect_later (h);
598  return;
599  }
601  "Received notification about transmission readiness to `%s'.\n",
602  GNUNET_i2s (&smr->peer));
603  if (NULL == pr->env)
604  {
605  /* request must have been cancelled between the original request
606  * and the response from CORE, ignore CORE's readiness */
607  return;
608  }
609  if (ntohs (smr->smr_id) != pr->smr_id_gen)
610  {
611  /* READY message is for expired or cancelled message,
612  * ignore! (we should have already sent another request) */
613  return;
614  }
615 
616  /* ok, all good, send message out! */
617  GNUNET_MQ_send (h->mq, pr->env);
618  pr->env = NULL;
620 }
621 
622 
629 static void
631 {
632  struct GNUNET_MQ_MessageHandler handlers[] =
633  { GNUNET_MQ_hd_fixed_size (init_reply,
635  struct InitReplyMessage,
636  h),
639  struct ConnectNotifyMessage,
640  h),
644  h),
645  GNUNET_MQ_hd_var_size (notify_inbound,
647  struct NotifyTrafficMessage,
648  h),
649  GNUNET_MQ_hd_fixed_size (send_ready,
651  struct SendMessageReady,
652  h),
654  struct InitMessage *init;
655  struct GNUNET_MQ_Envelope *env;
656  uint16_t *ts;
657 
658  GNUNET_assert (NULL == h->mq);
659  h->mq = GNUNET_CLIENT_connect (h->cfg, "core", handlers, &handle_mq_error, h);
660  if (NULL == h->mq)
661  {
662  reconnect_later (h);
663  return;
664  }
665  env = GNUNET_MQ_msg_extra (init,
666  sizeof(uint16_t) * h->hcnt,
668  LOG (GNUNET_ERROR_TYPE_INFO, "(Re)connecting to CORE service\n");
669  init->options = htonl (0);
670  ts = (uint16_t *) &init[1];
671  for (unsigned int hpos = 0; hpos < h->hcnt; hpos++)
672  ts[hpos] = htons (h->handlers[hpos].type);
673  GNUNET_MQ_send (h->mq, env);
674 }
675 
676 
691 struct GNUNET_CORE_Handle *
693  void *cls,
697  const struct GNUNET_MQ_MessageHandler *handlers)
698 {
699  struct GNUNET_CORE_Handle *h;
700 
701  h = GNUNET_new (struct GNUNET_CORE_Handle);
702  h->cfg = cfg;
703  h->cls = cls;
704  h->init = init;
705  h->connects = connects;
708  h->handlers = GNUNET_MQ_copy_handlers (handlers);
709  h->hcnt = GNUNET_MQ_count_handlers (handlers);
710  GNUNET_assert (h->hcnt <
711  (GNUNET_MAX_MESSAGE_SIZE - sizeof(struct InitMessage))
712  / sizeof(uint16_t));
713  LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to CORE service\n");
714  reconnect (h);
715  if (NULL == h->mq)
716  {
718  return NULL;
719  }
720  return h;
721 }
722 
723 
729 void
731 {
732  LOG (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting from CORE service\n");
735  handle);
737  handle->peers = NULL;
738  if (NULL != handle->reconnect_task)
739  {
741  handle->reconnect_task = NULL;
742  }
743  if (NULL != handle->mq)
744  {
745  GNUNET_MQ_destroy (handle->mq);
746  handle->mq = NULL;
747  }
748  GNUNET_free_non_null (handle->handlers);
749  GNUNET_free (handle);
750 }
751 
752 
760 struct GNUNET_MQ_Handle *
762  const struct GNUNET_PeerIdentity *pid)
763 {
764  struct PeerRecord *pr;
765 
767  if (NULL == pr)
768  return NULL;
769  return pr->mq;
770 }
771 
772 
773 /* end of core_api.c */
struct GNUNET_MQ_Envelope * env
Message we are currently trying to pass to the CORE service for this peer (from mq).
Definition: core_api.c:54
static GNUNET_NETWORK_STRUCT_END struct GNUNET_PeerIdentity me
Our own peer identity.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
#define GNUNET_MESSAGE_TYPE_CORE_SEND
Client with message to transmit (after SEND_READY confirmation was received).
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
Context for the core service connection.
Definition: core_api.c:77
Information we track for each peer.
Definition: core_api.c:38
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_MQ_msg_nested_mh(mvar, type, mh)
Allocate a GNUNET_MQ_Envelope, and append a payload message after the given message struct...
struct GNUNET_PeerIdentity me
Identity of this peer.
Definition: core_api.c:123
uint32_t priority
How important is this message?
Definition: core.h:206
static void connect_peer(struct GNUNET_CORE_Handle *h, const struct GNUNET_PeerIdentity *peer)
Add the given peer to the list of our connected peers and create the respective data structures and n...
Definition: core_api.c:376
GNUNET_MQ_Error
Error codes for the queue.
GNUNET_CORE_StartupCallback init
Function to call once we&#39;ve handshaked with the core service.
Definition: core_api.c:92
GNUNET_CORE_ConnectEventHandler connects
Function to call whenever we&#39;re notified about a peer connecting.
Definition: core_api.c:97
#define LOG(kind,...)
Definition: core_api.c:32
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
void(* GNUNET_CORE_DisconnectEventHandler)(void *cls, const struct GNUNET_PeerIdentity *peer, void *peer_cls)
Method called whenever a peer disconnects.
struct GNUNET_MQ_MessageHandler * GNUNET_MQ_copy_handlers(const struct GNUNET_MQ_MessageHandler *handlers)
Copy an array of handlers.
Definition: mq.c:1214
static void handle_disconnect_notify(void *cls, const struct DisconnectNotifyMessage *dnm)
Handle disconnect message received from CORE service.
Definition: core_api.c:494
static int check_notify_inbound(void *cls, const struct NotifyTrafficMessage *ntm)
Check that message received from CORE service is well-formed.
Definition: core_api.c:528
Message sent by the service to clients to notify them about a peer connecting.
Definition: core.h:124
struct GNUNET_MQ_Handle * mq
Message queue for the peer.
Definition: core_api.c:48
common internal definitions for core service
void * cls
Closure for the various callbacks.
Definition: core_api.c:87
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we&#39;re using.
Definition: core_api.c:82
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
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_CORE_StartupCallback)(void *cls, const struct GNUNET_PeerIdentity *my_identity)
Function called after GNUNET_CORE_connect has succeeded (or failed for good).
#define GNUNET_NO
Definition: gnunet_common.h:78
struct GNUNET_PeerIdentity peer
Peer the record is about.
Definition: core_api.c:65
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND
Notify clients about incoming P2P messages.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
GNUNET_MQ_PriorityPreferences
Per envelope preferences and priorities.
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT
Notify clients about peer disconnecting.
uint32_t options
Options, see GNUNET_CORE_OPTION_ values.
Definition: core.h:93
struct GNUNET_PeerIdentity my_identity
Public key of the local peer.
Definition: core.h:116
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
static void core_mq_cancel_impl(struct GNUNET_MQ_Handle *mq, void *impl_state)
Implementation function that cancels the currently sent message.
Definition: core_api.c:338
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
struct GNUNET_PeerIdentity peer
Identity of the intended target.
Definition: core.h:217
Message transmitted core clients to gnunet-service-core to start the interaction. ...
Definition: core.h:83
struct GNUNET_SCHEDULER_Task * reconnect_task
ID of reconnect task (if any).
Definition: core_api.c:128
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
int have_init
Did we ever get INIT?
Definition: core_api.c:143
struct GNUNET_CORE_Handle * h
Corresponding CORE handle.
Definition: core_api.c:43
void *(* GNUNET_CORE_ConnectEventHandler)(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a given peer connects.
Message transmitted by the gnunet-service-core process to its clients in response to an INIT message...
Definition: core.h:101
enum GNUNET_MQ_PriorityPreferences GNUNET_MQ_env_get_options(struct GNUNET_MQ_Envelope *env)
Get performance preferences set for this envelope.
Definition: mq.c:1020
void GNUNET_MQ_set_handlers_closure(struct GNUNET_MQ_Handle *mq, void *handlers_cls)
Change the closure argument in all of the handlers of the mq.
Definition: mq.c:583
#define GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST
Request from client to transmit message.
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:104
static void handle_init_reply(void *cls, const struct InitReplyMessage *m)
Handle init reply message received from CORE service.
Definition: core_api.c:414
#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:52
#define GNUNET_MESSAGE_TYPE_CORE_INIT
Initial setup message from core client to core.
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:1253
uint16_t type
Type of the message this handler covers, in host byte order.
Core notifying client that it is allowed to now transmit a message to the given target (response to G...
Definition: core.h:241
struct GNUNET_MQ_Handle * GNUNET_MQ_queue_for_callbacks(GNUNET_MQ_SendImpl send, GNUNET_MQ_DestroyImpl destroy, GNUNET_MQ_CancelImpl cancel, void *impl_state, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *cls)
Create a message queue for the specified handlers.
Definition: mq.c:552
static int disconnect_and_free_peer_entry(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Notify clients about disconnect and free the entry for connected peer.
Definition: core_api.c:184
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
void * client_cls
Value the client returned when we connected, used as the closure in various places.
Definition: core_api.c:60
static char * value
Value of the record to add/remove.
struct GNUNET_TIME_Relative retry_backoff
Current delay we use for re-trying to connect to core.
Definition: core_api.c:133
uint16_t size
How large is the message?
Definition: core.h:227
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
uint16_t smr_id
Counter for this peer to match SMRs to replies.
Definition: core.h:232
static void reconnect_task(void *cls)
Task schedule to try to re-connect to core.
Definition: core_api.c:164
static void core_mq_destroy_impl(struct GNUNET_MQ_Handle *mq, void *impl_state)
Handle destruction of a message queue.
Definition: core_api.c:321
Client asking core to transmit a particular message to a particular target (response to GNUNET_MESSAG...
Definition: core.h:272
struct GNUNET_PeerIdentity peer
Identity of the intended receiver.
Definition: core.h:294
static void reconnect_later(struct GNUNET_CORE_Handle *h)
Close down any existing connection to the CORE service and try re-establishing it later...
Definition: core_api.c:215
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
void GNUNET_MQ_inject_message(struct GNUNET_MQ_Handle *mq, const struct GNUNET_MessageHeader *mh)
Call the message message handler that was registered for the type of the given message in the given m...
Definition: mq.c:202
Client notifying core about the maximum-priority message it has in the queue for a particular target...
Definition: core.h:196
struct GNUNET_MQ_Handle * mq
Our message queue for transmissions to the service.
Definition: core_api.c:112
struct GNUNET_PeerIdentity peer
Identity of the connecting peer.
Definition: core.h:139
Internal representation of the hash map.
#define GNUNET_TIME_UNIT_MILLISECONDS
One millisecond.
Message handler for a specific message type.
void * connects(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Definition: 010.c:2
unsigned int GNUNET_MQ_count_handlers(const struct GNUNET_MQ_MessageHandler *handlers)
Count the handlers in a handler array.
Definition: mq.c:1274
void GNUNET_MQ_discard(struct GNUNET_MQ_Envelope *mqm)
Discard the message queue message, free all allocated resources.
Definition: mq.c:321
struct GNUNET_MessageHeader header
Header with type GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND or GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND...
Definition: core.h:181
void disconnects(void *cls, const struct GNUNET_PeerIdentity *peer)
Definition: 011.c:2
There must only be one value per key; storing a value should fail if a value under the same key alrea...
struct GNUNET_HashCode key
The key used in the DHT.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
#define GNUNET_MESSAGE_TYPE_CORE_SEND_READY
Confirmation from core that message can now be sent.
static void handle_notify_inbound(void *cls, const struct NotifyTrafficMessage *ntm)
Handle inbound message received from CORE service.
Definition: core_api.c:558
struct GNUNET_CORE_Handle * GNUNET_CORE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls, GNUNET_CORE_StartupCallback init, GNUNET_CORE_ConnectEventHandler connects, GNUNET_CORE_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Connect to the core service.
Definition: core_api.c:692
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:730
struct GNUNET_MQ_MessageHandler * handlers
Function handlers for messages of particular type.
Definition: core_api.c:107
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT
Notify clients about new peer-to-peer connections (triggered after key exchange). ...
static char * init
Set to the name of a service to start.
Definition: gnunet-arm.c:74
#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 void core_mq_send_impl(struct GNUNET_MQ_Handle *mq, const struct GNUNET_MessageHeader *msg, void *impl_state)
Implement sending functionality of a message queue for us sending messages to a peer.
Definition: core_api.c:259
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message...
struct GNUNET_MQ_Handle * GNUNET_CORE_get_mq(const struct GNUNET_CORE_Handle *h, const struct GNUNET_PeerIdentity *pid)
Obtain the message queue for a connected peer.
Definition: core_api.c:761
struct GNUNET_CONTAINER_MultiPeerMap * peers
Hash map listing all of the peers that we are currently connected to.
Definition: core_api.c:118
uint16_t smr_id
smr_id from the request.
Definition: core.h:259
Handle to a message queue.
Definition: mq.c:85
static void handle_connect_notify(void *cls, const struct ConnectNotifyMessage *cnm)
Handle connect message received from CORE service.
Definition: core_api.c:461
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.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
The identity of the host (wraps the signing key of the peer).
static void handle_mq_error(void *cls, enum GNUNET_MQ_Error error)
Error handler for the message queue to the CORE service.
Definition: core_api.c:241
uint32_t reserved
Always zero.
Definition: core.h:157
configuration data
Definition: configuration.c:85
uint32_t priority
How important is this message? Contains a enum GNUNET_MQ_PriorityPreferences in NBO.
Definition: core.h:283
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.
static void * connect_notify(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
Entry in list of pending tasks.
Definition: scheduler.c:134
static void handle_send_ready(void *cls, const struct SendMessageReady *smr)
Handle message received from CORE service notifying us that we are now allowed to send a message to a...
Definition: core_api.c:588
static void reconnect(struct GNUNET_CORE_Handle *h)
Our current client connection went down.
Definition: core_api.c:630
Message sent by the service to clients to notify them about a peer disconnecting. ...
Definition: core.h:147
Message sent by the service to clients to notify them about messages being received or transmitted...
Definition: core.h:175
struct GNUNET_PeerIdentity peer
Identity of the connecting peer.
Definition: core.h:162
Header for all communications.
struct GNUNET_MQ_Envelope * GNUNET_MQ_get_current_envelope(struct GNUNET_MQ_Handle *mq)
Function to obtain the current envelope from within GNUNET_MQ_SendImpl implementations.
Definition: mq.c:974
unsigned int hcnt
Number of entries in the handlers array.
Definition: core_api.c:138
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:824
#define GNUNET_YES
Definition: gnunet_common.h:77
uint32_t reserved
Always zero.
Definition: core.h:111
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:353
static struct GNUNET_PeerIdentity pid
Identity of the peer we transmit to / connect to.
uint16_t smr_id_gen
SendMessageRequest ID generator for this peer.
Definition: core_api.c:70
void GNUNET_MQ_impl_send_continue(struct GNUNET_MQ_Handle *mq)
Call the send implementation for the next queued message, if any.
Definition: mq.c:486
struct GNUNET_PeerIdentity peer
Identity of the intended target.
Definition: core.h:264
#define GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY
Response from core to core client to INIT message.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
struct GNUNET_PeerIdentity peer
Identity of the receiver or sender.
Definition: core.h:186
static void core_mq_error_handler(void *cls, enum GNUNET_MQ_Error error)
We had an error processing a message we forwarded from a peer to the CORE service.
Definition: core_api.c:358
#define GNUNET_free(ptr)
Wrapper around free.
Time for relative time used by GNUnet, in microseconds.
static void disconnect_notify(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a peer disconnects.
GNUNET_CORE_DisconnectEventHandler disconnects
Function to call whenever we&#39;re notified about a peer disconnecting.
Definition: core_api.c:102
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:966