2 This file is part of GNUnet
3 Copyright (C) 2013, 2014 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
21 * @file set/gnunet-service-set.c
22 * @brief two-peer set operations
23 * @author Florian Dold
24 * @author Christian Grothoff
26 #include "gnunet-service-set.h"
27 #include "gnunet-service-set_protocol.h"
30 * How long do we hold on to an incoming channel if there is
31 * no local listener before giving up?
33 #define INCOMING_CHANNEL_TIMEOUT GNUNET_TIME_UNIT_MINUTES
36 * A listener is inhabited by a client, and waits for evaluation
37 * requests from remote peers.
42 * Listeners are held in a doubly linked list.
44 struct Listener *next;
47 * Listeners are held in a doubly linked list.
49 struct Listener *prev;
52 * Client that owns the listener.
53 * Only one client may own a listener.
55 struct GNUNET_SERVER_Client *client;
58 * Message queue for the client
60 struct GNUNET_MQ_Handle *client_mq;
63 * Application ID for the operation, used to distinguish
64 * multiple operations of the same type with the same peer.
66 struct GNUNET_HashCode app_id;
69 * The type of the operation.
71 enum GNUNET_SET_OperationType operation;
75 struct LazyCopyRequest
77 struct Set *source_set;
80 struct LazyCopyRequest *prev;
81 struct LazyCopyRequest *next;
86 * Configuration of our local peer.
88 static const struct GNUNET_CONFIGURATION_Handle *configuration;
91 * Handle to the cadet service, used to listen for and connect to
94 static struct GNUNET_CADET_Handle *cadet;
97 * Sets are held in a doubly linked list.
99 static struct Set *sets_head;
102 * Sets are held in a doubly linked list.
104 static struct Set *sets_tail;
107 * Listeners are held in a doubly linked list.
109 static struct Listener *listeners_head;
112 * Listeners are held in a doubly linked list.
114 static struct Listener *listeners_tail;
117 * Incoming sockets from remote peers are held in a doubly linked
120 static struct Operation *incoming_head;
123 * Incoming sockets from remote peers are held in a doubly linked
126 static struct Operation *incoming_tail;
128 static struct LazyCopyRequest *lazy_copy_head;
129 static struct LazyCopyRequest *lazy_copy_tail;
131 static uint32_t lazy_copy_cookie = 1;
134 * Counter for allocating unique IDs for clients, used to identify
135 * incoming operation requests from remote peers, that the client can
136 * choose to accept or refuse.
138 static uint32_t suggest_id = 1;
142 * Get set that is owned by the given client, if any.
144 * @param client client to look for
145 * @return set that the client owns, NULL if the client
149 set_get (struct GNUNET_SERVER_Client *client)
153 for (set = sets_head; NULL != set; set = set->next)
154 if (set->client == client)
161 * Get the listener associated with the given client, if any.
163 * @param client the client
164 * @return listener associated with the client, NULL
167 static struct Listener *
168 listener_get (struct GNUNET_SERVER_Client *client)
170 struct Listener *listener;
172 for (listener = listeners_head; NULL != listener; listener = listener->next)
173 if (listener->client == client)
180 * Get the incoming socket associated with the given id.
182 * @param id id to look for
183 * @return the incoming socket associated with the id,
184 * or NULL if there is none
186 static struct Operation *
187 get_incoming (uint32_t id)
189 struct Operation *op;
191 for (op = incoming_head; NULL != op; op = op->next)
192 if (op->suggest_id == id)
194 GNUNET_assert (GNUNET_YES == op->is_incoming);
202 * Destroy a listener, free all resources associated with it.
204 * @param listener listener to destroy
207 listener_destroy (struct Listener *listener)
209 /* If the client is not dead yet, destroy it.
210 * The client's destroy callback will destroy the listener again. */
211 if (NULL != listener->client)
213 struct GNUNET_SERVER_Client *client = listener->client;
215 listener->client = NULL;
216 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
217 "Disconnecting listener client\n");
218 GNUNET_SERVER_client_disconnect (client);
221 if (NULL != listener->client_mq)
223 GNUNET_MQ_destroy (listener->client_mq);
224 listener->client_mq = NULL;
226 GNUNET_CONTAINER_DLL_remove (listeners_head,
229 GNUNET_free (listener);
234 * Context for the #garbage_collect_cb().
236 struct GarbageContext
240 * Map for which we are garbage collecting removed elements.
242 struct GNUNET_CONTAINER_MultiHashMap *map;
245 * Lowest generation for which an operation is still pending.
247 unsigned int min_op_generation;
250 * Largest generation for which an operation is still pending.
252 unsigned int max_op_generation;
258 * Function invoked to check if an element can be removed from
259 * the set's history because it is no longer needed.
261 * @param cls the `struct GarbageContext *`
262 * @param key key of the element in the map
263 * @param value the `struct ElementEntry *`
264 * @return #GNUNET_OK (continue to iterate)
267 garbage_collect_cb (void *cls,
268 const struct GNUNET_HashCode *key,
271 //struct GarbageContext *gc = cls;
272 //struct ElementEntry *ee = value;
274 //if (GNUNET_YES != ee->removed)
276 //if ( (gc->max_op_generation < ee->generation_added) ||
277 // (ee->generation_removed > gc->min_op_generation) )
279 // GNUNET_assert (GNUNET_YES ==
280 // GNUNET_CONTAINER_multihashmap_remove (gc->map,
290 * Collect and destroy elements that are not needed anymore, because
291 * their lifetime (as determined by their generation) does not overlap
292 * with any active set operation.
294 * @param set set to garbage collect
297 collect_generation_garbage (struct Set *set)
299 struct Operation *op;
300 struct GarbageContext gc;
302 gc.min_op_generation = UINT_MAX;
303 gc.max_op_generation = 0;
304 for (op = set->ops_head; NULL != op; op = op->next)
306 gc.min_op_generation = GNUNET_MIN (gc.min_op_generation,
307 op->generation_created);
308 gc.max_op_generation = GNUNET_MAX (gc.max_op_generation,
309 op->generation_created);
311 gc.map = set->content->elements;
312 GNUNET_CONTAINER_multihashmap_iterate (set->content->elements,
318 is_excluded_generation (unsigned int generation,
319 struct GenerationRange *excluded,
320 unsigned int excluded_size)
324 for (i = 0; i < excluded_size; i++)
326 if ( (generation >= excluded[i].start) && (generation < excluded[i].end) )
335 is_element_of_generation (struct ElementEntry *ee,
336 unsigned int query_generation,
337 struct GenerationRange *excluded,
338 unsigned int excluded_size)
340 struct MutationEvent *mut;
344 GNUNET_assert (NULL != ee->mutations);
346 if (GNUNET_YES == is_excluded_generation (query_generation, excluded, excluded_size))
352 is_present = GNUNET_NO;
354 /* Could be made faster with binary search, but lists
355 are small, so why bother. */
356 for (i = 0; i < ee->mutations_size; i++)
358 mut = &ee->mutations[i];
360 if (mut->generation > query_generation)
362 /* The mutation doesn't apply to our generation
363 anymore. We can'b break here, since mutations aren't
364 sorted by generation. */
368 if (GNUNET_YES == is_excluded_generation (mut->generation, excluded, excluded_size))
370 /* The generation is excluded (because it belongs to another
371 fork via a lazy copy) and thus mutations aren't considered
372 for membership testing. */
376 /* This would be an inconsistency in how we manage mutations. */
377 if ( (GNUNET_YES == is_present) && (GNUNET_YES == mut->added) )
381 if ( (GNUNET_NO == is_present) && (GNUNET_NO == mut->added) )
384 is_present = mut->added;
392 _GSS_is_element_of_set (struct ElementEntry *ee,
395 return is_element_of_generation (ee,
396 set->current_generation,
397 set->excluded_generations,
398 set->excluded_generations_size);
403 is_element_of_iteration (struct ElementEntry *ee,
406 return is_element_of_generation (ee,
407 set->iter_generation,
408 set->excluded_generations,
409 set->excluded_generations_size);
414 _GSS_is_element_of_operation (struct ElementEntry *ee,
415 struct Operation *op)
417 return is_element_of_generation (ee,
418 op->generation_created,
419 op->spec->set->excluded_generations,
420 op->spec->set->excluded_generations_size);
425 * Destroy the given operation. Call the implementation-specific
426 * cancel function of the operation. Disconnects from the remote
427 * peer. Does not disconnect the client, as there may be multiple
428 * operations per set.
430 * @param op operation to destroy
431 * @param gc #GNUNET_YES to perform garbage collection on the set
434 _GSS_operation_destroy (struct Operation *op,
438 struct GNUNET_CADET_Channel *channel;
442 /* already in #_GSS_operation_destroy() */
445 GNUNET_assert (GNUNET_NO == op->is_incoming);
446 GNUNET_assert (NULL != op->spec);
448 GNUNET_CONTAINER_DLL_remove (set->ops_head,
453 if (NULL != op->spec)
455 if (NULL != op->spec->context_msg)
457 GNUNET_free (op->spec->context_msg);
458 op->spec->context_msg = NULL;
460 GNUNET_free (op->spec);
465 GNUNET_MQ_destroy (op->mq);
468 if (NULL != (channel = op->channel))
471 GNUNET_CADET_channel_destroy (channel);
473 if (GNUNET_YES == gc)
474 collect_generation_garbage (set);
475 /* We rely on the channel end handler to free 'op'. When 'op->channel' was NULL,
476 * there was a channel end handler that will free 'op' on the call stack. */
481 * Iterator over hash map entries to free element entries.
484 * @param key current key code
485 * @param value a `struct ElementEntry *` to be free'd
486 * @return #GNUNET_YES (continue to iterate)
489 destroy_elements_iterator (void *cls,
490 const struct GNUNET_HashCode *key,
493 struct ElementEntry *ee = value;
495 GNUNET_free_non_null (ee->mutations);
503 * Destroy a set, and free all resources and operations associated with it.
505 * @param set the set to destroy
508 set_destroy (struct Set *set)
510 if (NULL != set->client)
512 /* If the client is not dead yet, destroy it. The client's destroy
513 * callback will call `set_destroy()` again in this case. We do
514 * this so that the channel end handler still has a valid set handle
516 struct GNUNET_SERVER_Client *client = set->client;
519 GNUNET_SERVER_client_disconnect (client);
522 GNUNET_assert (NULL != set->state);
523 while (NULL != set->ops_head)
524 _GSS_operation_destroy (set->ops_head, GNUNET_NO);
525 set->vt->destroy_set (set->state);
527 if (NULL != set->client_mq)
529 GNUNET_MQ_destroy (set->client_mq);
530 set->client_mq = NULL;
532 if (NULL != set->iter)
534 GNUNET_CONTAINER_multihashmap_iterator_destroy (set->iter);
539 struct SetContent *content;
540 struct PendingMutation *pm;
541 struct PendingMutation *pm_current;
543 content = set->content;
545 // discard any pending mutations that reference this set
546 pm = content->pending_mutations_head;
551 if (pm_current-> set == set)
552 GNUNET_CONTAINER_DLL_remove (content->pending_mutations_head,
553 content->pending_mutations_tail,
559 GNUNET_assert (0 != content->refcount);
560 content->refcount -= 1;
561 if (0 == content->refcount)
563 GNUNET_assert (NULL != content->elements);
564 GNUNET_CONTAINER_multihashmap_iterate (content->elements,
565 &destroy_elements_iterator,
567 GNUNET_CONTAINER_multihashmap_destroy (content->elements);
568 content->elements = NULL;
569 GNUNET_free (content);
572 GNUNET_free_non_null (set->excluded_generations);
573 set->excluded_generations = NULL;
574 GNUNET_CONTAINER_DLL_remove (sets_head,
578 // remove set from pending copy requests
580 struct LazyCopyRequest *lcr;
581 lcr = lazy_copy_head;
584 struct LazyCopyRequest *lcr_current;
587 if (lcr_current->source_set == set)
588 GNUNET_CONTAINER_DLL_remove (lazy_copy_head,
599 * Clean up after a client has disconnected
601 * @param cls closure, unused
602 * @param client the client to clean up after
605 handle_client_disconnect (void *cls,
606 struct GNUNET_SERVER_Client *client)
609 struct Listener *listener;
611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
612 "client disconnected, cleaning up\n");
613 set = set_get (client);
618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
619 "Client's set destroyed\n");
621 listener = listener_get (client);
622 if (NULL != listener)
624 listener->client = NULL;
625 listener_destroy (listener);
626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
627 "Client's listener destroyed\n");
633 * Destroy an incoming request from a remote peer
635 * @param incoming remote request to destroy
638 incoming_destroy (struct Operation *incoming)
640 struct GNUNET_CADET_Channel *channel;
642 GNUNET_assert (GNUNET_YES == incoming->is_incoming);
643 GNUNET_CONTAINER_DLL_remove (incoming_head,
646 if (NULL != incoming->timeout_task)
648 GNUNET_SCHEDULER_cancel (incoming->timeout_task);
649 incoming->timeout_task = NULL;
651 /* make sure that the tunnel end handler will not destroy us again */
653 if (NULL != incoming->spec)
655 GNUNET_free (incoming->spec);
656 incoming->spec = NULL;
658 if (NULL != incoming->mq)
660 GNUNET_MQ_destroy (incoming->mq);
663 if (NULL != (channel = incoming->channel))
665 incoming->channel = NULL;
666 GNUNET_CADET_channel_destroy (channel);
672 * Find a listener that is interested in the given operation type
673 * and application id.
675 * @param op operation type to look for
676 * @param app_id application id to look for
677 * @return a matching listener, or NULL if no listener matches the
678 * given operation and application id
680 static struct Listener *
681 listener_get_by_target (enum GNUNET_SET_OperationType op,
682 const struct GNUNET_HashCode *app_id)
684 struct Listener *listener;
686 for (listener = listeners_head; NULL != listener; listener = listener->next)
687 if ( (listener->operation == op) &&
688 (0 == GNUNET_CRYPTO_hash_cmp (app_id, &listener->app_id)) )
695 * Suggest the given request to the listener. The listening client can
696 * then accept or reject the remote request.
698 * @param incoming the incoming peer with the request to suggest
699 * @param listener the listener to suggest the request to
702 incoming_suggest (struct Operation *incoming,
703 struct Listener *listener)
705 struct GNUNET_MQ_Envelope *mqm;
706 struct GNUNET_SET_RequestMessage *cmsg;
708 GNUNET_assert (GNUNET_YES == incoming->is_incoming);
709 GNUNET_assert (NULL != incoming->spec);
710 GNUNET_assert (0 == incoming->suggest_id);
711 incoming->suggest_id = suggest_id++;
714 GNUNET_assert (NULL != incoming->timeout_task);
715 GNUNET_SCHEDULER_cancel (incoming->timeout_task);
716 incoming->timeout_task = NULL;
717 mqm = GNUNET_MQ_msg_nested_mh (cmsg,
718 GNUNET_MESSAGE_TYPE_SET_REQUEST,
719 incoming->spec->context_msg);
720 GNUNET_assert (NULL != mqm);
721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
722 "Suggesting incoming request with accept id %u to listener\n",
723 incoming->suggest_id);
724 cmsg->accept_id = htonl (incoming->suggest_id);
725 cmsg->peer_id = incoming->spec->peer;
726 GNUNET_MQ_send (listener->client_mq, mqm);
731 * Handle a request for a set operation from another peer. Checks if we
732 * have a listener waiting for such a request (and in that case initiates
733 * asking the listener about accepting the connection). If no listener
734 * is waiting, we queue the operation request in hope that a listener
735 * shows up soon (before timeout).
737 * This msg is expected as the first and only msg handled through the
738 * non-operation bound virtual table, acceptance of this operation replaces
739 * our virtual table and subsequent msgs would be routed differently (as
740 * we then know what type of operation this is).
742 * @param op the operation state
743 * @param mh the received message
744 * @return #GNUNET_OK if the channel should be kept alive,
745 * #GNUNET_SYSERR to destroy the channel
748 handle_incoming_msg (struct Operation *op,
749 const struct GNUNET_MessageHeader *mh)
751 const struct OperationRequestMessage *msg;
752 struct Listener *listener;
753 struct OperationSpecification *spec;
754 const struct GNUNET_MessageHeader *nested_context;
756 msg = (const struct OperationRequestMessage *) mh;
757 GNUNET_assert (GNUNET_YES == op->is_incoming);
758 if (GNUNET_MESSAGE_TYPE_SET_P2P_OPERATION_REQUEST != ntohs (mh->type))
761 return GNUNET_SYSERR;
763 /* double operation request */
764 if (NULL != op->spec)
767 return GNUNET_SYSERR;
769 spec = GNUNET_new (struct OperationSpecification);
770 nested_context = GNUNET_MQ_extract_nested_mh (msg);
771 if ( (NULL != nested_context) &&
772 (ntohs (nested_context->size) > GNUNET_SET_CONTEXT_MESSAGE_MAX_SIZE) )
776 return GNUNET_SYSERR;
778 /* Make a copy of the nested_context (application-specific context
779 information that is opaque to set) so we can pass it to the
781 if (NULL != nested_context)
782 spec->context_msg = GNUNET_copy_message (nested_context);
783 spec->operation = ntohl (msg->operation);
784 spec->app_id = msg->app_id;
785 spec->salt = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
787 spec->peer = op->peer;
788 spec->remote_element_count = ntohl (msg->element_count);
791 listener = listener_get_by_target (ntohl (msg->operation),
793 if (NULL == listener)
795 GNUNET_break (NULL != op->timeout_task);
796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
797 "No matching listener for incoming request (op %u, app %s), waiting with timeout\n",
798 ntohl (msg->operation),
799 GNUNET_h2s (&msg->app_id));
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
803 "Received P2P operation request (op %u, app %s) for active listener\n",
804 ntohl (msg->operation),
805 GNUNET_h2s (&msg->app_id));
806 incoming_suggest (op, listener);
812 execute_add (struct Set *set,
813 const struct GNUNET_MessageHeader *m)
815 const struct GNUNET_SET_ElementMessage *msg;
816 struct GNUNET_SET_Element el;
817 struct ElementEntry *ee;
818 struct GNUNET_HashCode hash;
820 GNUNET_assert (GNUNET_MESSAGE_TYPE_SET_ADD == ntohs (m->type));
822 msg = (const struct GNUNET_SET_ElementMessage *) m;
823 el.size = ntohs (m->size) - sizeof *msg;
824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
825 "Client inserts element of size %u\n",
828 GNUNET_CRYPTO_hash (el.data,
832 ee = GNUNET_CONTAINER_multihashmap_get (set->content->elements,
837 ee = GNUNET_malloc (el.size + sizeof *ee);
838 ee->element.size = el.size;
842 ee->element.data = &ee[1];
843 ee->remote = GNUNET_NO;
844 ee->mutations = NULL;
845 ee->mutations_size = 0;
846 ee->element_hash = hash;
848 else if (GNUNET_YES == _GSS_is_element_of_set (ee, set))
850 /* same element inserted twice */
855 struct MutationEvent mut = {
856 .generation = set->current_generation,
859 GNUNET_array_append (ee->mutations, ee->mutations_size, mut);
862 GNUNET_break (GNUNET_YES ==
863 GNUNET_CONTAINER_multihashmap_put (set->content->elements,
866 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
867 set->vt->add (set->state, ee);
872 execute_remove (struct Set *set,
873 const struct GNUNET_MessageHeader *m)
875 const struct GNUNET_SET_ElementMessage *msg;
876 struct GNUNET_SET_Element el;
877 struct ElementEntry *ee;
878 struct GNUNET_HashCode hash;
880 GNUNET_assert (GNUNET_MESSAGE_TYPE_SET_REMOVE == ntohs (m->type));
882 msg = (const struct GNUNET_SET_ElementMessage *) m;
883 el.size = ntohs (m->size) - sizeof *msg;
884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
885 "Client removes element of size %u\n",
888 GNUNET_CRYPTO_hash (el.data,
891 ee = GNUNET_CONTAINER_multihashmap_get (set->content->elements,
895 /* Client tried to remove non-existing element. */
898 if (GNUNET_NO == _GSS_is_element_of_set (ee, set))
900 /* Client tried to remove element twice */
905 struct MutationEvent mut = {
906 .generation = set->current_generation,
909 GNUNET_array_append (ee->mutations, ee->mutations_size, mut);
911 set->vt->remove (set->state, ee);
917 execute_mutation (struct Set *set,
918 const struct GNUNET_MessageHeader *m)
920 switch (ntohs (m->type))
922 case GNUNET_MESSAGE_TYPE_SET_ADD:
923 execute_add (set, m);
925 case GNUNET_MESSAGE_TYPE_SET_REMOVE:
926 execute_remove (set, m);
936 * Send the next element of a set to the set's client. The next element is given by
937 * the set's current hashmap iterator. The set's iterator will be set to NULL if there
938 * are no more elements in the set. The caller must ensure that the set's iterator is
941 * The client will acknowledge each received element with a
942 * #GNUNET_MESSAGE_TYPE_SET_ITER_ACK message. Our
943 * #handle_client_iter_ack() will then trigger the next transmission.
944 * Note that the #GNUNET_MESSAGE_TYPE_SET_ITER_DONE is not acknowledged.
946 * @param set set that should send its next element to its client
949 send_client_element (struct Set *set)
952 struct ElementEntry *ee;
953 struct GNUNET_MQ_Envelope *ev;
954 struct GNUNET_SET_IterResponseMessage *msg;
956 GNUNET_assert (NULL != set->iter);
960 ret = GNUNET_CONTAINER_multihashmap_iterator_next (set->iter,
962 (const void **) &ee);
963 if (GNUNET_NO == ret)
965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
966 "Iteration on %p done.\n",
968 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SET_ITER_DONE);
969 GNUNET_CONTAINER_multihashmap_iterator_destroy (set->iter);
973 GNUNET_assert (set->content->iterator_count > 0);
974 set->content->iterator_count -= 1;
976 if (0 == set->content->iterator_count)
978 while (NULL != set->content->pending_mutations_head)
980 struct PendingMutation *pm;
982 pm = set->content->pending_mutations_head;
983 GNUNET_CONTAINER_DLL_remove (set->content->pending_mutations_head,
984 set->content->pending_mutations_tail,
986 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
987 "Executing pending mutation on %p.\n",
989 execute_mutation (pm->set, pm->mutation_message);
990 GNUNET_free (pm->mutation_message);
998 GNUNET_assert (NULL != ee);
1000 if (GNUNET_NO == is_element_of_iteration (ee, set))
1003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1004 "Sending iteration element on %p.\n",
1006 ev = GNUNET_MQ_msg_extra (msg,
1008 GNUNET_MESSAGE_TYPE_SET_ITER_ELEMENT);
1012 msg->element_type = ee->element.element_type;
1013 msg->iteration_id = htons (set->iteration_id);
1015 GNUNET_MQ_send (set->client_mq, ev);
1020 * Called when a client wants to iterate the elements of a set.
1021 * Checks if we have a set associated with the client and if we
1022 * can right now start an iteration. If all checks out, starts
1023 * sending the elements of the set to the client.
1026 * @param client client that sent the message
1027 * @param m message sent by the client
1030 handle_client_iterate (void *cls,
1031 struct GNUNET_SERVER_Client *client,
1032 const struct GNUNET_MessageHeader *m)
1036 set = set_get (client);
1039 /* attempt to iterate over a non existing set */
1041 GNUNET_SERVER_client_disconnect (client);
1044 if (NULL != set->iter)
1046 /* Only one concurrent iterate-action allowed per set */
1048 GNUNET_SERVER_client_disconnect (client);
1051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1052 "Iterating set %p in gen %u with %u content elements\n",
1054 set->current_generation,
1055 GNUNET_CONTAINER_multihashmap_size (set->content->elements));
1056 GNUNET_SERVER_receive_done (client,
1058 set->content->iterator_count += 1;
1059 set->iter = GNUNET_CONTAINER_multihashmap_iterator_create (set->content->elements);
1060 set->iter_generation = set->current_generation;
1061 send_client_element (set);
1066 * Called when a client wants to create a new set. This is typically
1067 * the first request from a client, and includes the type of set
1068 * operation to be performed.
1071 * @param client client that sent the message
1072 * @param m message sent by the client
1075 handle_client_create_set (void *cls,
1076 struct GNUNET_SERVER_Client *client,
1077 const struct GNUNET_MessageHeader *m)
1079 const struct GNUNET_SET_CreateMessage *msg;
1082 msg = (const struct GNUNET_SET_CreateMessage *) m;
1083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1084 "Client created new set (operation %u)\n",
1085 ntohl (msg->operation));
1086 if (NULL != set_get (client))
1088 /* There can only be one set per client */
1090 GNUNET_SERVER_client_disconnect (client);
1093 set = GNUNET_new (struct Set);
1094 switch (ntohl (msg->operation))
1096 case GNUNET_SET_OPERATION_INTERSECTION:
1097 set->vt = _GSS_intersection_vt ();
1099 case GNUNET_SET_OPERATION_UNION:
1100 set->vt = _GSS_union_vt ();
1105 GNUNET_SERVER_client_disconnect (client);
1108 set->operation = ntohl (msg->operation);
1109 set->state = set->vt->create ();
1110 set->content = GNUNET_new (struct SetContent);
1111 set->content->refcount = 1;
1112 set->content->elements = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_YES);
1113 set->client = client;
1114 set->client_mq = GNUNET_MQ_queue_for_server_client (client);
1115 GNUNET_CONTAINER_DLL_insert (sets_head,
1118 GNUNET_SERVER_receive_done (client,
1124 * Called when a client wants to create a new listener.
1127 * @param client client that sent the message
1128 * @param m message sent by the client
1131 handle_client_listen (void *cls,
1132 struct GNUNET_SERVER_Client *client,
1133 const struct GNUNET_MessageHeader *m)
1135 const struct GNUNET_SET_ListenMessage *msg;
1136 struct Listener *listener;
1137 struct Operation *op;
1139 msg = (const struct GNUNET_SET_ListenMessage *) m;
1140 if (NULL != listener_get (client))
1142 /* max. one active listener per client! */
1144 GNUNET_SERVER_client_disconnect (client);
1147 listener = GNUNET_new (struct Listener);
1148 listener->client = client;
1149 listener->client_mq = GNUNET_MQ_queue_for_server_client (client);
1150 listener->app_id = msg->app_id;
1151 listener->operation = ntohl (msg->operation);
1152 GNUNET_CONTAINER_DLL_insert_tail (listeners_head,
1155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1156 "New listener created (op %u, app %s)\n",
1157 listener->operation,
1158 GNUNET_h2s (&listener->app_id));
1160 /* check for existing incoming requests the listener might be interested in */
1161 for (op = incoming_head; NULL != op; op = op->next)
1163 if (NULL == op->spec)
1164 continue; /* no details available yet */
1165 if (0 != op->suggest_id)
1166 continue; /* this one has been already suggested to a listener */
1167 if (listener->operation != op->spec->operation)
1168 continue; /* incompatible operation */
1169 if (0 != GNUNET_CRYPTO_hash_cmp (&listener->app_id,
1171 continue; /* incompatible appliation */
1172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1173 "Found matching existing request\n");
1174 incoming_suggest (op,
1177 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1182 * Called when the listening client rejects an operation
1183 * request by another peer.
1186 * @param client client that sent the message
1187 * @param m message sent by the client
1190 handle_client_reject (void *cls,
1191 struct GNUNET_SERVER_Client *client,
1192 const struct GNUNET_MessageHeader *m)
1194 struct Operation *incoming;
1195 const struct GNUNET_SET_RejectMessage *msg;
1197 msg = (const struct GNUNET_SET_RejectMessage *) m;
1198 incoming = get_incoming (ntohl (msg->accept_reject_id));
1199 if (NULL == incoming)
1201 /* no matching incoming operation for this reject */
1203 GNUNET_SERVER_receive_done (client,
1207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1208 "Peer request (op %u, app %s) rejected by client\n",
1209 incoming->spec->operation,
1210 GNUNET_h2s (&incoming->spec->app_id));
1211 GNUNET_CADET_channel_destroy (incoming->channel);
1212 GNUNET_SERVER_receive_done (client,
1219 * Called when a client wants to add or remove an element to a set it inhabits.
1222 * @param client client that sent the message
1223 * @param m message sent by the client
1226 handle_client_mutation (void *cls,
1227 struct GNUNET_SERVER_Client *client,
1228 const struct GNUNET_MessageHeader *m)
1232 set = set_get (client);
1235 /* client without a set requested an operation */
1237 GNUNET_SERVER_client_disconnect (client);
1241 GNUNET_SERVER_receive_done (client,
1244 if (0 != set->content->iterator_count)
1246 struct PendingMutation *pm;
1248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1249 "Scheduling mutation on set\n");
1251 pm = GNUNET_new (struct PendingMutation);
1252 pm->mutation_message = GNUNET_copy_message (m);
1254 GNUNET_CONTAINER_DLL_insert (set->content->pending_mutations_head,
1255 set->content->pending_mutations_tail,
1260 execute_mutation (set, m);
1265 * Advance the current generation of a set,
1266 * adding exclusion ranges if necessary.
1268 * @param set the set where we want to advance the generation
1271 advance_generation (struct Set *set)
1273 struct GenerationRange r;
1275 if (set->current_generation == set->content->latest_generation)
1277 set->content->latest_generation += 1;
1278 set->current_generation += 1;
1282 GNUNET_assert (set->current_generation < set->content->latest_generation);
1284 r.start = set->current_generation + 1;
1285 r.end = set->content->latest_generation + 1;
1287 set->content->latest_generation = r.end;
1288 set->current_generation = r.end;
1290 GNUNET_array_append (set->excluded_generations,
1291 set->excluded_generations_size,
1296 * Called when a client wants to initiate a set operation with another
1297 * peer. Initiates the CADET connection to the listener and sends the
1301 * @param client client that sent the message
1302 * @param m message sent by the client
1305 handle_client_evaluate (void *cls,
1306 struct GNUNET_SERVER_Client *client,
1307 const struct GNUNET_MessageHeader *m)
1310 const struct GNUNET_SET_EvaluateMessage *msg;
1311 struct OperationSpecification *spec;
1312 struct Operation *op;
1313 const struct GNUNET_MessageHeader *context;
1315 set = set_get (client);
1319 GNUNET_SERVER_client_disconnect (client);
1322 msg = (const struct GNUNET_SET_EvaluateMessage *) m;
1323 spec = GNUNET_new (struct OperationSpecification);
1324 spec->operation = set->operation;
1325 spec->app_id = msg->app_id;
1326 spec->salt = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
1328 spec->peer = msg->target_peer;
1330 spec->result_mode = ntohl (msg->result_mode);
1331 spec->client_request_id = ntohl (msg->request_id);
1332 context = GNUNET_MQ_extract_nested_mh (msg);
1333 op = GNUNET_new (struct Operation);
1336 // Advance generation values, so that
1337 // mutations won't interfer with the running operation.
1338 op->generation_created = set->current_generation;
1339 advance_generation (set);
1342 GNUNET_CONTAINER_DLL_insert (set->ops_head,
1345 op->channel = GNUNET_CADET_channel_create (cadet,
1348 GNUNET_APPLICATION_TYPE_SET,
1349 GNUNET_CADET_OPTION_RELIABLE);
1350 op->mq = GNUNET_CADET_mq_create (op->channel);
1351 set->vt->evaluate (op,
1353 GNUNET_SERVER_receive_done (client,
1359 * Handle an ack from a client, and send the next element. Note
1360 * that we only expect acks for set elements, not after the
1361 * #GNUNET_MESSAGE_TYPE_SET_ITER_DONE message.
1364 * @param client the client
1365 * @param m the message
1368 handle_client_iter_ack (void *cls,
1369 struct GNUNET_SERVER_Client *client,
1370 const struct GNUNET_MessageHeader *m)
1372 const struct GNUNET_SET_IterAckMessage *ack;
1375 set = set_get (client);
1378 /* client without a set acknowledged receiving a value */
1380 GNUNET_SERVER_client_disconnect (client);
1383 if (NULL == set->iter)
1385 /* client sent an ack, but we were not expecting one (as
1386 set iteration has finished) */
1388 GNUNET_SERVER_client_disconnect (client);
1391 ack = (const struct GNUNET_SET_IterAckMessage *) m;
1392 GNUNET_SERVER_receive_done (client,
1394 if (ntohl (ack->send_more))
1396 send_client_element (set);
1400 GNUNET_CONTAINER_multihashmap_iterator_destroy (set->iter);
1402 set->iteration_id++;
1408 * Handle a request from the client to
1412 * @param client the client
1413 * @param mh the message
1416 handle_client_copy_lazy_prepare (void *cls,
1417 struct GNUNET_SERVER_Client *client,
1418 const struct GNUNET_MessageHeader *mh)
1421 struct LazyCopyRequest *cr;
1422 struct GNUNET_MQ_Envelope *ev;
1423 struct GNUNET_SET_CopyLazyResponseMessage *resp_msg;
1425 set = set_get (client);
1428 /* client without a set requested an operation */
1430 GNUNET_SERVER_client_disconnect (client);
1434 cr = GNUNET_new (struct LazyCopyRequest);
1436 cr->cookie = lazy_copy_cookie;
1437 lazy_copy_cookie += 1;
1438 cr->source_set = set;
1440 GNUNET_CONTAINER_DLL_insert (lazy_copy_head,
1445 ev = GNUNET_MQ_msg (resp_msg,
1446 GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_RESPONSE);
1447 resp_msg->cookie = cr->cookie;
1448 GNUNET_MQ_send (set->client_mq, ev);
1451 GNUNET_SERVER_receive_done (client,
1454 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1455 "Client requested lazy copy\n");
1460 * Handle a request from the client to
1461 * connect to a copy of a set.
1464 * @param client the client
1465 * @param mh the message
1468 handle_client_copy_lazy_connect (void *cls,
1469 struct GNUNET_SERVER_Client *client,
1470 const struct GNUNET_MessageHeader *mh)
1472 struct LazyCopyRequest *cr;
1473 const struct GNUNET_SET_CopyLazyConnectMessage *msg =
1474 (const struct GNUNET_SET_CopyLazyConnectMessage *) mh;
1478 if (NULL != set_get (client))
1480 /* There can only be one set per client */
1482 GNUNET_SERVER_client_disconnect (client);
1488 for (cr = lazy_copy_head; NULL != cr; cr = cr->next)
1490 if (cr->cookie == msg->cookie)
1497 if (GNUNET_NO == found)
1499 /* client asked for copy with cookie we don't know */
1501 GNUNET_SERVER_client_disconnect (client);
1505 GNUNET_CONTAINER_DLL_remove (lazy_copy_head,
1509 set = GNUNET_new (struct Set);
1511 switch (cr->source_set->operation)
1513 case GNUNET_SET_OPERATION_INTERSECTION:
1514 set->vt = _GSS_intersection_vt ();
1516 case GNUNET_SET_OPERATION_UNION:
1517 set->vt = _GSS_union_vt ();
1524 if (NULL == set->vt->copy_state) {
1525 /* Lazy copy not supported for this set operation */
1529 GNUNET_SERVER_client_disconnect (client);
1533 set->operation = cr->source_set->operation;
1534 set->state = set->vt->copy_state (cr->source_set);
1535 set->content = cr->source_set->content;
1536 set->content->refcount += 1;
1538 set->current_generation = cr->source_set->current_generation;
1539 set->excluded_generations_size = cr->source_set->excluded_generations_size;
1540 set->excluded_generations = GNUNET_memdup (cr->source_set->excluded_generations,
1541 set->excluded_generations_size * sizeof (struct GenerationRange));
1543 /* Advance the generation of the new set, so that mutations to the
1544 of the cloned set and the source set are independent. */
1545 advance_generation (set);
1548 set->client = client;
1549 set->client_mq = GNUNET_MQ_queue_for_server_client (client);
1550 GNUNET_CONTAINER_DLL_insert (sets_head,
1556 GNUNET_SERVER_receive_done (client,
1559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1560 "Client connected to lazy set\n");
1565 * Handle a request from the client to
1566 * cancel a running set operation.
1569 * @param client the client
1570 * @param mh the message
1573 handle_client_cancel (void *cls,
1574 struct GNUNET_SERVER_Client *client,
1575 const struct GNUNET_MessageHeader *mh)
1577 const struct GNUNET_SET_CancelMessage *msg =
1578 (const struct GNUNET_SET_CancelMessage *) mh;
1580 struct Operation *op;
1583 set = set_get (client);
1586 /* client without a set requested an operation */
1588 GNUNET_SERVER_client_disconnect (client);
1591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1592 "Client requested cancel for op %u\n",
1593 ntohl (msg->request_id));
1595 for (op = set->ops_head; NULL != op; op = op->next)
1597 if (op->spec->client_request_id == ntohl (msg->request_id))
1603 if (GNUNET_NO == found)
1605 /* It may happen that the operation was already destroyed due to
1606 * the other peer disconnecting. The client may not know about this
1607 * yet and try to cancel the (just barely non-existent) operation.
1608 * So this is not a hard error.
1610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1611 "Client canceled non-existent op\n");
1615 _GSS_operation_destroy (op,
1618 GNUNET_SERVER_receive_done (client,
1624 * Handle a request from the client to accept a set operation that
1625 * came from a remote peer. We forward the accept to the associated
1626 * operation for handling
1629 * @param client the client
1630 * @param mh the message
1633 handle_client_accept (void *cls,
1634 struct GNUNET_SERVER_Client *client,
1635 const struct GNUNET_MessageHeader *mh)
1638 const struct GNUNET_SET_AcceptMessage *msg;
1639 struct Operation *op;
1640 struct GNUNET_SET_ResultMessage *result_message;
1641 struct GNUNET_MQ_Envelope *ev;
1643 msg = (const struct GNUNET_SET_AcceptMessage *) mh;
1644 set = set_get (client);
1647 /* client without a set requested to accept */
1649 GNUNET_SERVER_client_disconnect (client);
1652 op = get_incoming (ntohl (msg->accept_reject_id));
1655 /* It is not an error if the set op does not exist -- it may
1656 * have been destroyed when the partner peer disconnected. */
1657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1658 "Client accepted request that is no longer active\n");
1659 ev = GNUNET_MQ_msg (result_message,
1660 GNUNET_MESSAGE_TYPE_SET_RESULT);
1661 result_message->request_id = msg->request_id;
1662 result_message->element_type = 0;
1663 result_message->result_status = htons (GNUNET_SET_STATUS_FAILURE);
1664 GNUNET_MQ_send (set->client_mq, ev);
1665 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1670 "Client accepting request %u\n",
1671 ntohl (msg->accept_reject_id));
1672 GNUNET_assert (GNUNET_YES == op->is_incoming);
1673 op->is_incoming = GNUNET_NO;
1674 GNUNET_CONTAINER_DLL_remove (incoming_head,
1677 op->spec->set = set;
1678 GNUNET_CONTAINER_DLL_insert (set->ops_head,
1681 op->spec->client_request_id = ntohl (msg->request_id);
1682 op->spec->result_mode = ntohl (msg->result_mode);
1684 // Advance generation values, so that
1685 // mutations won't interfer with the running operation.
1686 op->generation_created = set->current_generation;
1687 advance_generation (set);
1690 op->vt->accept (op);
1691 GNUNET_SERVER_receive_done (client,
1697 * Called to clean up, after a shutdown has been requested.
1699 * @param cls closure
1700 * @param tc context information (why was this task triggered now)
1703 shutdown_task (void *cls,
1704 const struct GNUNET_SCHEDULER_TaskContext *tc)
1706 while (NULL != incoming_head)
1707 incoming_destroy (incoming_head);
1708 while (NULL != listeners_head)
1709 listener_destroy (listeners_head);
1710 while (NULL != sets_head)
1711 set_destroy (sets_head);
1713 /* it's important to destroy cadet at the end, as all channels
1714 * must be destroyed before the cadet handle! */
1717 GNUNET_CADET_disconnect (cadet);
1720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1721 "handled shutdown request\n");
1726 * Timeout happens iff:
1727 * - we suggested an operation to our listener,
1728 * but did not receive a response in time
1729 * - we got the channel from a peer but no #GNUNET_MESSAGE_TYPE_SET_P2P_OPERATION_REQUEST
1730 * - shutdown (obviously)
1732 * @param cls channel context
1733 * @param tc context information (why was this task triggered now)
1736 incoming_timeout_cb (void *cls,
1737 const struct GNUNET_SCHEDULER_TaskContext *tc)
1739 struct Operation *incoming = cls;
1741 incoming->timeout_task = NULL;
1742 GNUNET_assert (GNUNET_YES == incoming->is_incoming);
1743 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1746 "Remote peer's incoming request timed out\n");
1747 incoming_destroy (incoming);
1752 * Terminates an incoming operation in case we have not yet received an
1753 * operation request. Called by the channel destruction handler.
1755 * @param op the channel context
1758 handle_incoming_disconnect (struct Operation *op)
1760 GNUNET_assert (GNUNET_YES == op->is_incoming);
1761 /* channel is already dead, incoming_destroy must not
1764 incoming_destroy (op);
1770 * Method called whenever another peer has added us to a channel the
1771 * other peer initiated. Only called (once) upon reception of data
1772 * with a message type which was subscribed to in
1773 * GNUNET_CADET_connect().
1775 * The channel context represents the operation itself and gets added to a DLL,
1776 * from where it gets looked up when our local listener client responds
1777 * to a proposed/suggested operation or connects and associates with this operation.
1779 * @param cls closure
1780 * @param channel new handle to the channel
1781 * @param initiator peer that started the channel
1782 * @param port Port this channel is for.
1783 * @param options Unused.
1784 * @return initial channel context for the channel
1785 * returns NULL on error
1788 channel_new_cb (void *cls,
1789 struct GNUNET_CADET_Channel *channel,
1790 const struct GNUNET_PeerIdentity *initiator,
1792 enum GNUNET_CADET_ChannelOption options)
1794 static const struct SetVT incoming_vt = {
1795 .msg_handler = &handle_incoming_msg,
1796 .peer_disconnect = &handle_incoming_disconnect
1798 struct Operation *incoming;
1800 if (GNUNET_APPLICATION_TYPE_SET != port)
1803 GNUNET_CADET_channel_destroy (channel);
1806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1807 "New incoming channel\n");
1808 incoming = GNUNET_new (struct Operation);
1809 incoming->is_incoming = GNUNET_YES;
1810 incoming->peer = *initiator;
1811 incoming->channel = channel;
1812 incoming->mq = GNUNET_CADET_mq_create (incoming->channel);
1813 incoming->vt = &incoming_vt;
1814 incoming->timeout_task
1815 = GNUNET_SCHEDULER_add_delayed (INCOMING_CHANNEL_TIMEOUT,
1816 &incoming_timeout_cb,
1818 GNUNET_CONTAINER_DLL_insert_tail (incoming_head,
1826 * Function called whenever a channel is destroyed. Should clean up
1827 * any associated state. It must NOT call
1828 * GNUNET_CADET_channel_destroy() on the channel.
1830 * The peer_disconnect function is part of a a virtual table set initially either
1831 * when a peer creates a new channel with us (#channel_new_cb()), or once we create
1832 * a new channel ourselves (evaluate).
1834 * Once we know the exact type of operation (union/intersection), the vt is
1835 * replaced with an operation specific instance (_GSS_[op]_vt).
1837 * @param cls closure (set from GNUNET_CADET_connect())
1838 * @param channel connection to the other end (henceforth invalid)
1839 * @param channel_ctx place where local state associated
1840 * with the channel is stored
1843 channel_end_cb (void *cls,
1844 const struct GNUNET_CADET_Channel *channel,
1847 struct Operation *op = channel_ctx;
1849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1850 "channel_end_cb called\n");
1853 /* the vt can be null if a client already requested canceling op. */
1856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1857 "calling peer disconnect due to channel end\n");
1858 op->vt->peer_disconnect (op);
1863 /* cadet will never call us with the context again! */
1866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1867 "channel_end_cb finished\n");
1872 * Functions with this signature are called whenever a message is
1873 * received via a cadet channel.
1875 * The msg_handler is a virtual table set in initially either when a peer
1876 * creates a new channel with us (channel_new_cb), or once we create a new channel
1877 * ourselves (evaluate).
1879 * Once we know the exact type of operation (union/intersection), the vt is
1880 * replaced with an operation specific instance (_GSS_[op]_vt).
1882 * @param cls Closure (set from GNUNET_CADET_connect()).
1883 * @param channel Connection to the other end.
1884 * @param channel_ctx Place to store local state associated with the channel.
1885 * @param message The actual message.
1886 * @return #GNUNET_OK to keep the channel open,
1887 * #GNUNET_SYSERR to close it (signal serious error).
1890 dispatch_p2p_message (void *cls,
1891 struct GNUNET_CADET_Channel *channel,
1893 const struct GNUNET_MessageHeader *message)
1895 struct Operation *op = *channel_ctx;
1898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1899 "Dispatching cadet message (type: %u)\n",
1900 ntohs (message->type));
1901 /* do this before the handler, as the handler might kill the channel */
1902 GNUNET_CADET_receive_done (channel);
1904 ret = op->vt->msg_handler (op,
1907 ret = GNUNET_SYSERR;
1908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1909 "Handled cadet message (type: %u)\n",
1910 ntohs (message->type));
1916 * Function called by the service's run
1917 * method to run service-specific setup code.
1919 * @param cls closure
1920 * @param server the initialized server
1921 * @param cfg configuration to use
1925 struct GNUNET_SERVER_Handle *server,
1926 const struct GNUNET_CONFIGURATION_Handle *cfg)
1928 static const struct GNUNET_SERVER_MessageHandler server_handlers[] = {
1929 { &handle_client_accept, NULL,
1930 GNUNET_MESSAGE_TYPE_SET_ACCEPT,
1931 sizeof (struct GNUNET_SET_AcceptMessage)},
1932 { &handle_client_iter_ack, NULL,
1933 GNUNET_MESSAGE_TYPE_SET_ITER_ACK,
1934 sizeof (struct GNUNET_SET_IterAckMessage) },
1935 { &handle_client_mutation, NULL,
1936 GNUNET_MESSAGE_TYPE_SET_ADD,
1938 { &handle_client_create_set, NULL,
1939 GNUNET_MESSAGE_TYPE_SET_CREATE,
1940 sizeof (struct GNUNET_SET_CreateMessage)},
1941 { &handle_client_iterate, NULL,
1942 GNUNET_MESSAGE_TYPE_SET_ITER_REQUEST,
1943 sizeof (struct GNUNET_MessageHeader)},
1944 { &handle_client_evaluate, NULL,
1945 GNUNET_MESSAGE_TYPE_SET_EVALUATE,
1947 { &handle_client_listen, NULL,
1948 GNUNET_MESSAGE_TYPE_SET_LISTEN,
1949 sizeof (struct GNUNET_SET_ListenMessage)},
1950 { &handle_client_reject, NULL,
1951 GNUNET_MESSAGE_TYPE_SET_REJECT,
1952 sizeof (struct GNUNET_SET_RejectMessage)},
1953 { &handle_client_mutation, NULL,
1954 GNUNET_MESSAGE_TYPE_SET_REMOVE,
1956 { &handle_client_cancel, NULL,
1957 GNUNET_MESSAGE_TYPE_SET_CANCEL,
1958 sizeof (struct GNUNET_SET_CancelMessage)},
1959 { &handle_client_copy_lazy_prepare, NULL,
1960 GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_PREPARE,
1961 sizeof (struct GNUNET_MessageHeader)},
1962 { &handle_client_copy_lazy_connect, NULL,
1963 GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_CONNECT,
1964 sizeof (struct GNUNET_SET_CopyLazyConnectMessage)},
1967 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
1968 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_P2P_OPERATION_REQUEST, 0},
1969 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_UNION_P2P_IBF, 0},
1970 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_P2P_ELEMENTS, 0},
1971 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_UNION_P2P_OFFER, 0},
1972 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_UNION_P2P_INQUIRY, 0},
1973 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_UNION_P2P_DEMAND, 0},
1974 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_P2P_ELEMENT_REQUESTS, 0},
1975 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_UNION_P2P_DONE, 0},
1976 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_UNION_P2P_SE, 0},
1977 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_ELEMENT_INFO, 0},
1978 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_BF, 0},
1979 { &dispatch_p2p_message, GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_DONE, 0},
1982 static const uint32_t cadet_ports[] = {GNUNET_APPLICATION_TYPE_SET, 0};
1984 configuration = cfg;
1985 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1986 &shutdown_task, NULL);
1987 GNUNET_SERVER_disconnect_notify (server,
1988 &handle_client_disconnect, NULL);
1989 GNUNET_SERVER_add_handlers (server,
1991 cadet = GNUNET_CADET_connect (cfg, NULL,
1998 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1999 _("Could not connect to cadet service\n"));
2006 * The main function for the set service.
2008 * @param argc number of arguments from the command line
2009 * @param argv command line arguments
2010 * @return 0 ok, 1 on error
2018 ret = GNUNET_SERVICE_run (argc, argv, "set",
2019 GNUNET_SERVICE_OPTION_NONE,
2021 return (GNUNET_OK == ret) ? 0 : 1;
2024 /* end of gnunet-service-set.c */