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3 (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
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22 * @file core/gnunet-service-core_clients.c
23 * @brief code for managing interactions with clients of core service
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_statistics_service.h"
29 #include "gnunet_transport_service.h"
30 #include "gnunet-service-core.h"
31 #include "gnunet-service-core_clients.h"
32 #include "gnunet-service-core_sessions.h"
33 #include "gnunet-service-core_typemap.h"
38 * How many messages do we queue up at most for optional
39 * notifications to a client? (this can cause notifications
40 * about outgoing messages to be dropped).
42 #define MAX_NOTIFY_QUEUE 1024
46 * Data structure for each client connected to the core service.
51 * Clients are kept in a linked list.
53 struct GSC_Client *next;
56 * Clients are kept in a linked list.
58 struct GSC_Client *prev;
61 * Handle for the client with the server API.
63 struct GNUNET_SERVER_Client *client_handle;
66 * Array of the types of messages this peer cares
67 * about (with "tcnt" entries). Allocated as part
68 * of this client struct, do not free!
70 const uint16_t *types;
73 * Map of peer identities to active transmission requests of this
74 * client to the peer (of type 'struct GSC_ClientActiveRequest').
76 struct GNUNET_CONTAINER_MultiHashMap *requests;
79 * Map containing all peers that this client knows we're connected to.
81 struct GNUNET_CONTAINER_MultiHashMap *connectmap;
84 * Options for messages this client cares about,
85 * see GNUNET_CORE_OPTION_ values.
90 * Number of types of incoming messages this client
91 * specifically cares about. Size of the "types" array.
99 * Big "or" of all client options.
101 static uint32_t all_client_options;
104 * Head of linked list of our clients.
106 static struct GSC_Client *client_head;
109 * Tail of linked list of our clients.
111 static struct GSC_Client *client_tail;
114 * Context for notifications we need to send to our clients.
116 static struct GNUNET_SERVER_NotificationContext *notifier;
119 * Tokenizer for messages received from clients.
121 static struct GNUNET_SERVER_MessageStreamTokenizer *client_mst;
125 * Lookup our client struct given the server's client handle.
127 * @param client server client handle to look up
128 * @return our client handle for the client
130 static struct GSC_Client *
131 find_client (struct GNUNET_SERVER_Client *client)
133 struct GSC_Client *c;
136 while ((c != NULL) && (c->client_handle != client))
143 * Send a message to one of our clients.
145 * @param client target for the message
146 * @param msg message to transmit
147 * @param can_drop could this message be dropped if the
148 * client's queue is getting too large?
151 send_to_client (struct GSC_Client *client,
152 const struct GNUNET_MessageHeader *msg, int can_drop)
154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
155 "Preparing to send %u bytes of message of type %u to client.\n",
156 (unsigned int) ntohs (msg->size),
157 (unsigned int) ntohs (msg->type));
158 GNUNET_SERVER_notification_context_unicast (notifier, client->client_handle,
164 * Send a message to one of our clients.
166 * @param client target for the message
167 * @param msg message to transmit
168 * @param can_drop could this message be dropped if the
169 * client's queue is getting too large?
172 GSC_CLIENTS_send_to_client (struct GNUNET_SERVER_Client *client,
173 const struct GNUNET_MessageHeader *msg,
176 struct GSC_Client *c;
178 c = find_client (client);
184 send_to_client (c, msg, can_drop);
189 * Test if the client is interested in messages of the given type.
191 * @param type message type
192 * @param c client to test
193 * @return GNUNET_YES if 'c' is interested, GNUNET_NO if not.
196 type_match (uint16_t type, struct GSC_Client *c)
201 return GNUNET_YES; /* peer without handlers matches ALL */
202 for (i = 0; i < c->tcnt; i++)
203 if (type == c->types[i])
210 * Send a message to all of our current clients that have the right
213 * @param partner origin (or destination) of the message (used to check that this peer is
214 * known to be connected to the respective client)
215 * @param msg message to multicast
216 * @param can_drop can this message be discarded if the queue is too long
217 * @param options mask to use
218 * @param type type of the embedded message, 0 for none
221 send_to_all_clients (const struct GNUNET_PeerIdentity *partner,
222 const struct GNUNET_MessageHeader *msg, int can_drop,
223 uint32_t options, uint16_t type)
225 struct GSC_Client *c;
228 for (c = client_head; c != NULL; c = c->next)
230 tm = type_match (type, c);
231 if (! ( (0 != (c->options & options)) ||
232 ( (0 != (options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) &&
233 (GNUNET_YES == tm) ) ) )
234 continue; /* neither options nor type match permit the message */
235 if ( (0 != (options & GNUNET_CORE_OPTION_SEND_HDR_INBOUND)) &&
236 ( (0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
237 (GNUNET_YES == tm) ) )
239 if ( (0 != (options & GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND)) &&
240 (0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND)) )
242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
243 "Sending %u message with %u bytes to client interested in messages of type %u.\n",
246 (unsigned int) type);
247 GNUNET_assert ( (0 == (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
248 (GNUNET_YES != tm) ||
250 GNUNET_CONTAINER_multihashmap_contains (c->connectmap,
251 &partner->hashPubKey)) );
252 send_to_client (c, msg, can_drop);
258 * Handle CORE_INIT request.
261 * @param client new client that sent INIT
262 * @param message the 'struct InitMessage' (presumably)
265 handle_client_init (void *cls, struct GNUNET_SERVER_Client *client,
266 const struct GNUNET_MessageHeader *message)
268 const struct InitMessage *im;
269 struct InitReplyMessage irm;
270 struct GSC_Client *c;
272 const uint16_t *types;
276 /* check that we don't have an entry already */
277 c = find_client (client);
281 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
284 msize = ntohs (message->size);
285 if (msize < sizeof (struct InitMessage))
288 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
291 GNUNET_SERVER_notification_context_add (notifier, client);
292 im = (const struct InitMessage *) message;
293 types = (const uint16_t *) &im[1];
294 msize -= sizeof (struct InitMessage);
295 c = GNUNET_malloc (sizeof (struct GSC_Client) + msize);
296 c->client_handle = client;
297 c->tcnt = msize / sizeof (uint16_t);
298 c->options = ntohl (im->options);
299 all_client_options |= c->options;
300 c->types = (const uint16_t *) &c[1];
301 c->connectmap = GNUNET_CONTAINER_multihashmap_create (16, GNUNET_NO);
302 GNUNET_assert (GNUNET_YES ==
303 GNUNET_CONTAINER_multihashmap_put (c->connectmap,
304 &GSC_my_identity.hashPubKey,
306 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
307 wtypes = (uint16_t *) & c[1];
308 for (i = 0; i < c->tcnt; i++)
309 wtypes[i] = ntohs (types[i]);
310 GSC_TYPEMAP_add (wtypes, c->tcnt);
311 GNUNET_CONTAINER_DLL_insert (client_head, client_tail, c);
312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
313 "Client connecting to core service is interested in %u message types\n",
314 (unsigned int) c->tcnt);
315 /* send init reply message */
316 irm.header.size = htons (sizeof (struct InitReplyMessage));
317 irm.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY);
318 irm.reserved = htonl (0);
319 irm.my_identity = GSC_my_identity;
320 send_to_client (c, &irm.header, GNUNET_NO);
321 GSC_SESSIONS_notify_client_about_sessions (c);
322 GNUNET_SERVER_receive_done (client, GNUNET_OK);
327 * Handle CORE_SEND_REQUEST message.
330 * @param client new client that sent CORE_SEND_REQUEST
331 * @param message the 'struct SendMessageRequest' (presumably)
334 handle_client_send_request (void *cls, struct GNUNET_SERVER_Client *client,
335 const struct GNUNET_MessageHeader *message)
337 const struct SendMessageRequest *req;
338 struct GSC_Client *c;
339 struct GSC_ClientActiveRequest *car;
342 req = (const struct SendMessageRequest *) message;
343 c = find_client (client);
346 /* client did not send INIT first! */
348 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
351 if (c->requests == NULL)
352 c->requests = GNUNET_CONTAINER_multihashmap_create (16, GNUNET_NO);
353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
354 "Client asked for transmission to `%s'\n",
355 GNUNET_i2s (&req->peer));
358 memcmp (&req->peer, &GSC_my_identity,
359 sizeof (struct GNUNET_PeerIdentity)));
360 if ((!is_loopback) &&
362 GNUNET_CONTAINER_multihashmap_contains (c->connectmap,
363 &req->peer.hashPubKey)))
365 /* neighbour must have disconnected since request was issued,
366 * ignore (client will realize it once it processes the
367 * disconnect notification) */
368 GNUNET_STATISTICS_update (GSC_stats,
370 ("# send requests dropped (disconnected)"), 1,
372 GNUNET_SERVER_receive_done (client, GNUNET_OK);
376 car = GNUNET_CONTAINER_multihashmap_get (c->requests, &req->peer.hashPubKey);
379 /* create new entry */
380 car = GNUNET_malloc (sizeof (struct GSC_ClientActiveRequest));
381 GNUNET_assert (GNUNET_OK ==
382 GNUNET_CONTAINER_multihashmap_put (c->requests,
383 &req->peer.hashPubKey,
385 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
386 car->client_handle = c;
390 GSC_SESSIONS_dequeue_request (car);
392 car->target = req->peer;
393 car->deadline = GNUNET_TIME_absolute_ntoh (req->deadline);
394 car->priority = ntohl (req->priority);
395 car->msize = ntohs (req->size);
396 car->smr_id = req->smr_id;
397 car->was_solicited = GNUNET_NO;
400 /* loopback, satisfy immediately */
401 GSC_CLIENTS_solicit_request (car);
402 GNUNET_SERVER_receive_done (client, GNUNET_OK);
405 GSC_SESSIONS_queue_request (car);
406 GNUNET_SERVER_receive_done (client, GNUNET_OK);
411 * Closure for the 'client_tokenizer_callback'.
413 struct TokenizerContext
417 * Active request handle for the message.
419 struct GSC_ClientActiveRequest *car;
422 * Is corking allowed (set only once we have the real message).
430 * Handle CORE_SEND request.
433 * @param client the client issuing the request
434 * @param message the "struct SendMessage"
437 handle_client_send (void *cls, struct GNUNET_SERVER_Client *client,
438 const struct GNUNET_MessageHeader *message)
440 const struct SendMessage *sm;
441 struct GSC_Client *c;
442 struct TokenizerContext tc;
445 msize = ntohs (message->size);
447 sizeof (struct SendMessage) + sizeof (struct GNUNET_MessageHeader))
450 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
453 sm = (const struct SendMessage *) message;
454 msize -= sizeof (struct SendMessage);
455 GNUNET_break (0 == ntohl (sm->reserved));
456 c = find_client (client);
459 /* client did not send INIT first! */
461 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
465 GNUNET_CONTAINER_multihashmap_get (c->requests, &sm->peer.hashPubKey);
468 /* Must have been that we first approved the request, then got disconnected
469 * (which triggered removal of the 'car') and now the client gives us a message
470 * just *before* the client learns about the disconnect. Theoretically, we
471 * might also now be *again* connected. So this can happen (but should be
472 * rare). If it does happen, the message is discarded. */
473 GNUNET_STATISTICS_update (GSC_stats,
475 ("# messages discarded (session disconnected)"),
477 GNUNET_SERVER_receive_done (client, GNUNET_OK);
480 GNUNET_assert (GNUNET_YES ==
481 GNUNET_CONTAINER_multihashmap_remove (c->requests,
482 &sm->peer.hashPubKey,
484 tc.cork = ntohl (sm->cork);
485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
486 "Client asked for transmission of %u bytes to `%s' %s\n", msize,
487 GNUNET_i2s (&sm->peer), tc.cork ? "now" : "");
488 GNUNET_SERVER_mst_receive (client_mst, &tc, (const char *) &sm[1], msize,
489 GNUNET_YES, GNUNET_NO);
491 memcmp (&tc.car->target, &GSC_my_identity,
492 sizeof (struct GNUNET_PeerIdentity)))
493 GSC_SESSIONS_dequeue_request (tc.car);
494 GNUNET_free (tc.car);
495 GNUNET_SERVER_receive_done (client, GNUNET_OK);
500 * Functions with this signature are called whenever a complete
501 * message is received by the tokenizer. Used by the 'client_mst' for
502 * dispatching messages from clients to either the SESSION subsystem
503 * or other CLIENT (for loopback).
506 * @param client reservation request ('struct GSC_ClientActiveRequest')
507 * @param message the actual message
510 client_tokenizer_callback (void *cls, void *client,
511 const struct GNUNET_MessageHeader *message)
513 struct TokenizerContext *tc = client;
514 struct GSC_ClientActiveRequest *car = tc->car;
517 GNUNET_snprintf (buf, sizeof (buf),
518 gettext_noop ("# bytes of messages of type %u received"),
519 (unsigned int) ntohs (message->type));
520 GNUNET_STATISTICS_update (GSC_stats, buf, ntohs (message->size), GNUNET_NO);
522 memcmp (&car->target, &GSC_my_identity,
523 sizeof (struct GNUNET_PeerIdentity)))
525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
526 "Delivering message of type %u to myself\n",
527 ntohs (message->type));
528 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
529 ntohs (message->size),
530 GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND);
531 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
532 sizeof (struct GNUNET_MessageHeader),
533 GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND);
534 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
535 ntohs (message->size),
536 GNUNET_CORE_OPTION_SEND_FULL_INBOUND);
537 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
538 sizeof (struct GNUNET_MessageHeader),
539 GNUNET_CORE_OPTION_SEND_HDR_INBOUND);
543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
544 "Delivering message of type %u to %s\n", ntohs (message->type),
545 GNUNET_i2s (&car->target));
546 GSC_CLIENTS_deliver_message (&car->target, message,
547 ntohs (message->size),
548 GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND);
549 GSC_CLIENTS_deliver_message (&car->target, message,
550 sizeof (struct GNUNET_MessageHeader),
551 GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND);
552 GSC_SESSIONS_transmit (car, message, tc->cork);
559 * Free client request records.
562 * @param key identity of peer for which this is an active request
563 * @param value the 'struct GSC_ClientActiveRequest' to free
564 * @return GNUNET_YES (continue iteration)
567 destroy_active_client_request (void *cls, const struct GNUNET_HashCode * key,
570 struct GSC_ClientActiveRequest *car = value;
572 GNUNET_assert (GNUNET_YES ==
573 GNUNET_CONTAINER_multihashmap_remove (car->
574 client_handle->requests,
575 &car->target.hashPubKey,
577 GSC_SESSIONS_dequeue_request (car);
584 * A client disconnected, clean up.
587 * @param client identification of the client
590 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
592 struct GSC_Client *c;
596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
597 "Client %p has disconnected from core service.\n", client);
598 c = find_client (client);
600 return; /* client never sent INIT */
601 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, c);
602 if (c->requests != NULL)
604 GNUNET_CONTAINER_multihashmap_iterate (c->requests,
605 &destroy_active_client_request,
607 GNUNET_CONTAINER_multihashmap_destroy (c->requests);
609 GNUNET_CONTAINER_multihashmap_destroy (c->connectmap);
610 c->connectmap = NULL;
611 GSC_TYPEMAP_remove (c->types, c->tcnt);
614 /* recalculate 'all_client_options' */
615 all_client_options = 0;
616 for (c = client_head; NULL != c ; c = c->next)
617 all_client_options |= c->options;
622 * Tell a client that we are ready to receive the message.
624 * @param car request that is now ready; the responsibility
625 * for the handle remains shared between CLIENTS
626 * and SESSIONS after this call.
629 GSC_CLIENTS_solicit_request (struct GSC_ClientActiveRequest *car)
631 struct GSC_Client *c;
632 struct SendMessageReady smr;
634 c = car->client_handle;
636 GNUNET_CONTAINER_multihashmap_contains (c->connectmap,
637 &car->target.hashPubKey))
639 /* connection has gone down since, drop request */
641 memcmp (&car->target, &GSC_my_identity,
642 sizeof (struct GNUNET_PeerIdentity)));
643 GSC_SESSIONS_dequeue_request (car);
644 GSC_CLIENTS_reject_request (car);
647 smr.header.size = htons (sizeof (struct SendMessageReady));
648 smr.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_SEND_READY);
649 smr.size = htons (car->msize);
650 smr.smr_id = car->smr_id;
651 smr.peer = car->target;
652 send_to_client (c, &smr.header, GNUNET_NO);
657 * Tell a client that we will never be ready to receive the
658 * given message in time (disconnect or timeout).
660 * @param car request that now permanently failed; the
661 * responsibility for the handle is now returned
662 * to CLIENTS (SESSIONS is done with it).
665 GSC_CLIENTS_reject_request (struct GSC_ClientActiveRequest *car)
667 GNUNET_assert (GNUNET_YES ==
668 GNUNET_CONTAINER_multihashmap_remove (car->
669 client_handle->requests,
670 &car->target.hashPubKey,
677 * Notify a particular client about a change to existing connection to
678 * one of our neighbours (check if the client is interested). Called
679 * from 'GSC_SESSIONS_notify_client_about_sessions'.
681 * @param client client to notify
682 * @param neighbour identity of the neighbour that changed status
683 * @param tmap_old previous type map for the neighbour, NULL for disconnect
684 * @param tmap_new updated type map for the neighbour, NULL for disconnect
687 GSC_CLIENTS_notify_client_about_neighbour (struct GSC_Client *client,
688 const struct GNUNET_PeerIdentity
690 const struct GSC_TypeMap *tmap_old,
691 const struct GSC_TypeMap *tmap_new)
693 struct ConnectNotifyMessage *cnm;
695 char buf[GNUNET_SERVER_MAX_MESSAGE_SIZE - 1] GNUNET_ALIGN;
696 struct DisconnectNotifyMessage dcm;
700 old_match = GSC_TYPEMAP_test_match (tmap_old, client->types, client->tcnt);
701 new_match = GSC_TYPEMAP_test_match (tmap_new, client->types, client->tcnt);
702 if (old_match == new_match)
704 GNUNET_assert (old_match ==
705 GNUNET_CONTAINER_multihashmap_contains (client->connectmap,
706 &neighbour->hashPubKey));
707 return; /* no change */
709 if (old_match == GNUNET_NO)
712 GNUNET_assert (GNUNET_NO ==
713 GNUNET_CONTAINER_multihashmap_contains (client->connectmap,
714 &neighbour->hashPubKey));
715 GNUNET_assert (GNUNET_YES ==
716 GNUNET_CONTAINER_multihashmap_put (client->connectmap,
717 &neighbour->hashPubKey,
719 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
720 size = sizeof (struct ConnectNotifyMessage);
721 cnm = (struct ConnectNotifyMessage *) buf;
722 cnm->header.size = htons (size);
723 cnm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT);
724 cnm->reserved = htonl (0);
725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message to client.\n",
727 cnm->peer = *neighbour;
728 send_to_client (client, &cnm->header, GNUNET_NO);
732 /* send disconnect */
733 GNUNET_assert (GNUNET_YES ==
734 GNUNET_CONTAINER_multihashmap_contains (client->connectmap,
735 &neighbour->hashPubKey));
736 GNUNET_assert (GNUNET_YES ==
737 GNUNET_CONTAINER_multihashmap_remove (client->connectmap,
738 &neighbour->hashPubKey,
740 dcm.header.size = htons (sizeof (struct DisconnectNotifyMessage));
741 dcm.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT);
742 dcm.reserved = htonl (0);
743 dcm.peer = *neighbour;
744 send_to_client (client, &dcm.header, GNUNET_NO);
750 * Notify all clients about a change to existing session.
751 * Called from SESSIONS whenever there is a change in sessions
752 * or types processed by the respective peer.
754 * @param neighbour identity of the neighbour that changed status
755 * @param tmap_old previous type map for the neighbour, NULL for disconnect
756 * @param tmap_new updated type map for the neighbour, NULL for disconnect
759 GSC_CLIENTS_notify_clients_about_neighbour (const struct GNUNET_PeerIdentity
761 const struct GSC_TypeMap *tmap_old,
762 const struct GSC_TypeMap *tmap_new)
764 struct GSC_Client *c;
766 for (c = client_head; c != NULL; c = c->next)
767 GSC_CLIENTS_notify_client_about_neighbour (c, neighbour,
773 * Deliver P2P message to interested clients. Caller must have checked
774 * that the sending peer actually lists the given message type as one
777 * @param sender peer who sent us the message
778 * @param msg the message
779 * @param msize number of bytes to transmit
780 * @param options options for checking which clients should
781 * receive the message
784 GSC_CLIENTS_deliver_message (const struct GNUNET_PeerIdentity *sender,
785 const struct GNUNET_MessageHeader *msg,
789 size_t size = msize + sizeof (struct NotifyTrafficMessage);
790 char buf[size] GNUNET_ALIGN;
791 struct NotifyTrafficMessage *ntm;
793 if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
796 /* recovery strategy: throw performance data away... */
797 size = msize + sizeof (struct NotifyTrafficMessage);
799 if (! ( (0 != (all_client_options & options)) ||
800 (0 != (options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ))
801 return; /* no client cares about this message notification */
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
803 "Core service passes message from `%4s' of type %u to client.\n",
804 GNUNET_i2s (sender), (unsigned int) ntohs (msg->type));
805 GSC_SESSIONS_add_to_typemap (sender, ntohs (msg->type));
806 ntm = (struct NotifyTrafficMessage *) buf;
807 ntm->header.size = htons (size);
808 if (0 != (options & (GNUNET_CORE_OPTION_SEND_FULL_INBOUND | GNUNET_CORE_OPTION_SEND_HDR_INBOUND)))
809 ntm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND);
811 ntm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND);
813 memcpy (&ntm[1], msg, msize);
814 send_to_all_clients (sender, &ntm->header, GNUNET_YES, options,
820 * Initialize clients subsystem.
822 * @param server handle to server clients connect to
825 GSC_CLIENTS_init (struct GNUNET_SERVER_Handle *server)
827 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
828 {&handle_client_init, NULL,
829 GNUNET_MESSAGE_TYPE_CORE_INIT, 0},
830 {&GSC_SESSIONS_handle_client_iterate_peers, NULL,
831 GNUNET_MESSAGE_TYPE_CORE_ITERATE_PEERS,
832 sizeof (struct GNUNET_MessageHeader)},
833 {&handle_client_send_request, NULL,
834 GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST,
835 sizeof (struct SendMessageRequest)},
836 {&handle_client_send, NULL,
837 GNUNET_MESSAGE_TYPE_CORE_SEND, 0},
841 /* setup notification */
842 client_mst = GNUNET_SERVER_mst_create (&client_tokenizer_callback, NULL);
844 GNUNET_SERVER_notification_context_create (server, MAX_NOTIFY_QUEUE);
845 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
846 GNUNET_SERVER_add_handlers (server, handlers);
851 * Shutdown clients subsystem.
856 struct GSC_Client *c;
858 while (NULL != (c = client_head))
859 handle_client_disconnect (NULL, c->client_handle);
860 if (NULL != notifier)
862 GNUNET_SERVER_notification_context_destroy (notifier);
865 if (NULL != client_mst)
867 GNUNET_SERVER_mst_destroy (client_mst);
872 /* end of gnunet-service-core_clients.c */