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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_MultiPeerMap *requests;
79 * Map containing all peers that this client knows we're connected to.
81 struct GNUNET_CONTAINER_MultiPeerMap *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_multipeermap_contains (c->connectmap,
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_multipeermap_create (16, GNUNET_NO);
302 GNUNET_assert (GNUNET_YES ==
303 GNUNET_CONTAINER_multipeermap_put (c->connectmap,
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_multipeermap_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_multipeermap_contains (c->connectmap,
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_multipeermap_get (c->requests, &req->peer);
379 /* create new entry */
380 car = GNUNET_new (struct GSC_ClientActiveRequest);
381 GNUNET_assert (GNUNET_OK ==
382 GNUNET_CONTAINER_multipeermap_put (c->requests,
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 = (enum GNUNET_CORE_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 * How important is this message.
424 enum GNUNET_CORE_Priority priority;
427 * Is corking allowed (set only once we have the real message).
435 * Handle CORE_SEND request.
438 * @param client the client issuing the request
439 * @param message the "struct SendMessage"
442 handle_client_send (void *cls, struct GNUNET_SERVER_Client *client,
443 const struct GNUNET_MessageHeader *message)
445 const struct SendMessage *sm;
446 struct GSC_Client *c;
447 struct TokenizerContext tc;
450 msize = ntohs (message->size);
452 sizeof (struct SendMessage) + sizeof (struct GNUNET_MessageHeader))
455 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
458 sm = (const struct SendMessage *) message;
459 msize -= sizeof (struct SendMessage);
460 GNUNET_break (0 == ntohl (sm->reserved));
461 c = find_client (client);
464 /* client did not send INIT first! */
466 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
470 GNUNET_CONTAINER_multipeermap_get (c->requests, &sm->peer);
473 /* Must have been that we first approved the request, then got disconnected
474 * (which triggered removal of the 'car') and now the client gives us a message
475 * just *before* the client learns about the disconnect. Theoretically, we
476 * might also now be *again* connected. So this can happen (but should be
477 * rare). If it does happen, the message is discarded. */
478 GNUNET_STATISTICS_update (GSC_stats,
480 ("# messages discarded (session disconnected)"),
482 GNUNET_SERVER_receive_done (client, GNUNET_OK);
485 GNUNET_assert (GNUNET_YES ==
486 GNUNET_CONTAINER_multipeermap_remove (c->requests,
489 tc.cork = ntohl (sm->cork);
490 tc.priority = (enum GNUNET_CORE_Priority) ntohl (sm->priority);
491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
492 "Client asked for transmission of %u bytes to `%s' %s\n",
494 GNUNET_i2s (&sm->peer), tc.cork ? "now" : "");
495 GNUNET_SERVER_mst_receive (client_mst, &tc,
496 (const char *) &sm[1], msize,
497 GNUNET_YES, GNUNET_NO);
499 memcmp (&tc.car->target, &GSC_my_identity,
500 sizeof (struct GNUNET_PeerIdentity)))
501 GSC_SESSIONS_dequeue_request (tc.car);
502 GNUNET_free (tc.car);
503 GNUNET_SERVER_receive_done (client, GNUNET_OK);
508 * Functions with this signature are called whenever a complete
509 * message is received by the tokenizer. Used by the 'client_mst' for
510 * dispatching messages from clients to either the SESSION subsystem
511 * or other CLIENT (for loopback).
514 * @param client reservation request (`struct GSC_ClientActiveRequest`)
515 * @param message the actual message
518 client_tokenizer_callback (void *cls, void *client,
519 const struct GNUNET_MessageHeader *message)
521 struct TokenizerContext *tc = client;
522 struct GSC_ClientActiveRequest *car = tc->car;
525 GNUNET_snprintf (buf, sizeof (buf),
526 gettext_noop ("# bytes of messages of type %u received"),
527 (unsigned int) ntohs (message->type));
528 GNUNET_STATISTICS_update (GSC_stats, buf, ntohs (message->size), GNUNET_NO);
530 memcmp (&car->target, &GSC_my_identity,
531 sizeof (struct GNUNET_PeerIdentity)))
533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
534 "Delivering message of type %u to myself\n",
535 ntohs (message->type));
536 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
537 ntohs (message->size),
538 GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND);
539 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
540 sizeof (struct GNUNET_MessageHeader),
541 GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND);
542 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
543 ntohs (message->size),
544 GNUNET_CORE_OPTION_SEND_FULL_INBOUND);
545 GSC_CLIENTS_deliver_message (&GSC_my_identity, message,
546 sizeof (struct GNUNET_MessageHeader),
547 GNUNET_CORE_OPTION_SEND_HDR_INBOUND);
551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
552 "Delivering message of type %u to %s\n",
553 ntohs (message->type),
554 GNUNET_i2s (&car->target));
555 GSC_CLIENTS_deliver_message (&car->target, message,
556 ntohs (message->size),
557 GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND);
558 GSC_CLIENTS_deliver_message (&car->target, message,
559 sizeof (struct GNUNET_MessageHeader),
560 GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND);
561 GSC_SESSIONS_transmit (car,
571 * Free client request records.
574 * @param key identity of peer for which this is an active request
575 * @param value the `struct GSC_ClientActiveRequest` to free
576 * @return #GNUNET_YES (continue iteration)
579 destroy_active_client_request (void *cls,
580 const struct GNUNET_PeerIdentity *key,
583 struct GSC_ClientActiveRequest *car = value;
585 GNUNET_assert (GNUNET_YES ==
586 GNUNET_CONTAINER_multipeermap_remove (car->
587 client_handle->requests,
590 GSC_SESSIONS_dequeue_request (car);
597 * A client disconnected, clean up.
600 * @param client identification of the client
603 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
605 struct GSC_Client *c;
609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
610 "Client %p has disconnected from core service.\n", client);
611 c = find_client (client);
613 return; /* client never sent INIT */
614 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, c);
615 if (c->requests != NULL)
617 GNUNET_CONTAINER_multipeermap_iterate (c->requests,
618 &destroy_active_client_request,
620 GNUNET_CONTAINER_multipeermap_destroy (c->requests);
622 GNUNET_CONTAINER_multipeermap_destroy (c->connectmap);
623 c->connectmap = NULL;
624 GSC_TYPEMAP_remove (c->types, c->tcnt);
627 /* recalculate 'all_client_options' */
628 all_client_options = 0;
629 for (c = client_head; NULL != c ; c = c->next)
630 all_client_options |= c->options;
635 * Tell a client that we are ready to receive the message.
637 * @param car request that is now ready; the responsibility
638 * for the handle remains shared between CLIENTS
639 * and SESSIONS after this call.
642 GSC_CLIENTS_solicit_request (struct GSC_ClientActiveRequest *car)
644 struct GSC_Client *c;
645 struct SendMessageReady smr;
647 c = car->client_handle;
649 GNUNET_CONTAINER_multipeermap_contains (c->connectmap,
652 /* connection has gone down since, drop request */
654 memcmp (&car->target, &GSC_my_identity,
655 sizeof (struct GNUNET_PeerIdentity)));
656 GSC_SESSIONS_dequeue_request (car);
657 GSC_CLIENTS_reject_request (car);
660 smr.header.size = htons (sizeof (struct SendMessageReady));
661 smr.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_SEND_READY);
662 smr.size = htons (car->msize);
663 smr.smr_id = car->smr_id;
664 smr.peer = car->target;
665 send_to_client (c, &smr.header, GNUNET_NO);
670 * Tell a client that we will never be ready to receive the
671 * given message in time (disconnect or timeout).
673 * @param car request that now permanently failed; the
674 * responsibility for the handle is now returned
675 * to CLIENTS (SESSIONS is done with it).
678 GSC_CLIENTS_reject_request (struct GSC_ClientActiveRequest *car)
680 GNUNET_assert (GNUNET_YES ==
681 GNUNET_CONTAINER_multipeermap_remove (car->
682 client_handle->requests,
690 * Notify a particular client about a change to existing connection to
691 * one of our neighbours (check if the client is interested). Called
692 * from 'GSC_SESSIONS_notify_client_about_sessions'.
694 * @param client client to notify
695 * @param neighbour identity of the neighbour that changed status
696 * @param tmap_old previous type map for the neighbour, NULL for connect
697 * @param tmap_new updated type map for the neighbour, NULL for disconnect
700 GSC_CLIENTS_notify_client_about_neighbour (struct GSC_Client *client,
701 const struct GNUNET_PeerIdentity
703 const struct GSC_TypeMap *tmap_old,
704 const struct GSC_TypeMap *tmap_new)
706 struct ConnectNotifyMessage *cnm;
708 char buf[GNUNET_SERVER_MAX_MESSAGE_SIZE - 1] GNUNET_ALIGN;
709 struct DisconnectNotifyMessage dcm;
713 old_match = GSC_TYPEMAP_test_match (tmap_old, client->types, client->tcnt);
714 new_match = GSC_TYPEMAP_test_match (tmap_new, client->types, client->tcnt);
715 if (old_match == new_match)
717 GNUNET_assert (old_match ==
718 GNUNET_CONTAINER_multipeermap_contains (client->connectmap,
720 return; /* no change */
722 if (old_match == GNUNET_NO)
725 GNUNET_assert (GNUNET_NO ==
726 GNUNET_CONTAINER_multipeermap_contains (client->connectmap,
728 GNUNET_assert (GNUNET_YES ==
729 GNUNET_CONTAINER_multipeermap_put (client->connectmap,
732 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
733 size = sizeof (struct ConnectNotifyMessage);
734 cnm = (struct ConnectNotifyMessage *) buf;
735 cnm->header.size = htons (size);
736 cnm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT);
737 cnm->reserved = htonl (0);
738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message to client.\n",
740 cnm->peer = *neighbour;
741 send_to_client (client, &cnm->header, GNUNET_NO);
745 /* send disconnect */
746 GNUNET_assert (GNUNET_YES ==
747 GNUNET_CONTAINER_multipeermap_contains (client->connectmap,
749 GNUNET_assert (GNUNET_YES ==
750 GNUNET_CONTAINER_multipeermap_remove (client->connectmap,
753 dcm.header.size = htons (sizeof (struct DisconnectNotifyMessage));
754 dcm.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT);
755 dcm.reserved = htonl (0);
756 dcm.peer = *neighbour;
757 send_to_client (client, &dcm.header, GNUNET_NO);
763 * Notify all clients about a change to existing session.
764 * Called from SESSIONS whenever there is a change in sessions
765 * or types processed by the respective peer.
767 * @param neighbour identity of the neighbour that changed status
768 * @param tmap_old previous type map for the neighbour, NULL for connect
769 * @param tmap_new updated type map for the neighbour, NULL for disconnect
772 GSC_CLIENTS_notify_clients_about_neighbour (const struct GNUNET_PeerIdentity
774 const struct GSC_TypeMap *tmap_old,
775 const struct GSC_TypeMap *tmap_new)
777 struct GSC_Client *c;
779 for (c = client_head; c != NULL; c = c->next)
780 GSC_CLIENTS_notify_client_about_neighbour (c, neighbour,
786 * Deliver P2P message to interested clients. Caller must have checked
787 * that the sending peer actually lists the given message type as one
790 * @param sender peer who sent us the message
791 * @param msg the message
792 * @param msize number of bytes to transmit
793 * @param options options for checking which clients should
794 * receive the message
797 GSC_CLIENTS_deliver_message (const struct GNUNET_PeerIdentity *sender,
798 const struct GNUNET_MessageHeader *msg,
802 size_t size = msize + sizeof (struct NotifyTrafficMessage);
803 char buf[size] GNUNET_ALIGN;
804 struct NotifyTrafficMessage *ntm;
806 if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
809 /* recovery strategy: throw performance data away... */
810 size = msize + sizeof (struct NotifyTrafficMessage);
812 if (! ( (0 != (all_client_options & options)) ||
813 (0 != (options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ))
814 return; /* no client cares about this message notification */
815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
816 "Core service passes message from `%4s' of type %u to client.\n",
817 GNUNET_i2s (sender), (unsigned int) ntohs (msg->type));
818 GSC_SESSIONS_add_to_typemap (sender, ntohs (msg->type));
819 ntm = (struct NotifyTrafficMessage *) buf;
820 ntm->header.size = htons (size);
821 if (0 != (options & (GNUNET_CORE_OPTION_SEND_FULL_INBOUND | GNUNET_CORE_OPTION_SEND_HDR_INBOUND)))
822 ntm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND);
824 ntm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND);
826 memcpy (&ntm[1], msg, msize);
827 send_to_all_clients (sender, &ntm->header, GNUNET_YES, options,
833 * Initialize clients subsystem.
835 * @param server handle to server clients connect to
838 GSC_CLIENTS_init (struct GNUNET_SERVER_Handle *server)
840 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
841 {&handle_client_init, NULL,
842 GNUNET_MESSAGE_TYPE_CORE_INIT, 0},
843 {&GSC_SESSIONS_handle_client_iterate_peers, NULL,
844 GNUNET_MESSAGE_TYPE_CORE_ITERATE_PEERS,
845 sizeof (struct GNUNET_MessageHeader)},
846 {&handle_client_send_request, NULL,
847 GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST,
848 sizeof (struct SendMessageRequest)},
849 {&handle_client_send, NULL,
850 GNUNET_MESSAGE_TYPE_CORE_SEND, 0},
854 /* setup notification */
855 client_mst = GNUNET_SERVER_mst_create (&client_tokenizer_callback, NULL);
857 GNUNET_SERVER_notification_context_create (server, MAX_NOTIFY_QUEUE);
858 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
859 GNUNET_SERVER_add_handlers (server, handlers);
864 * Shutdown clients subsystem.
869 struct GSC_Client *c;
871 while (NULL != (c = client_head))
872 handle_client_disconnect (NULL, c->client_handle);
873 if (NULL != notifier)
875 GNUNET_SERVER_notification_context_destroy (notifier);
878 if (NULL != client_mst)
880 GNUNET_SERVER_mst_destroy (client_mst);
885 /* end of gnunet-service-core_clients.c */