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22 * @file testbed/gnunet-service-testbed_cache.h
23 * @brief testbed cache implementation
24 * @author Sree Harsha Totakura
26 #include "gnunet-service-testbed.h"
29 * Redefine LOG with a changed log component string
34 #define LOG(kind,...) \
35 GNUNET_log_from (kind, "testbed-cache", __VA_ARGS__)
39 * Type of cache-get requests
44 * Get transport handle
46 CGT_TRANSPORT_HANDLE = 1,
56 * The cache-get request handle
58 struct GSTCacheGetHandle;
62 * This context structure is used to maintain a queue of notifications to check
63 * which of them are to be notified when a peer is connected.
65 struct ConnectNotifyContext
68 * The next ptr for the DLL
70 struct ConnectNotifyContext *next;
73 * The prev ptr for the DLL
75 struct ConnectNotifyContext *prev;
78 * The peer identity of the target peer. When this target peer is connected,
79 * call the notify callback
81 const struct GNUNET_PeerIdentity *target;
84 * The notify callback to be called when the target peer is connected
86 GST_cache_peer_connect_notify cb;
89 * The closure for the notify callback
94 * The GSTCacheGetHandle reposible for creating this context
96 struct GSTCacheGetHandle *cgh;
102 * The cache-get request handle
104 struct GSTCacheGetHandle
107 * The next ptr for the DLL. Used in struct CacheEntry
109 struct GSTCacheGetHandle *next;
112 * The prev ptr for the DLL. Used in struct CacheEntry
114 struct GSTCacheGetHandle *prev;
117 * The cache entry object this handle corresponds to
119 struct CacheEntry *entry;
122 * The cache callback to call when a handle is available
124 GST_cache_handle_ready_cb cb;
127 * The closure for the above callback
132 * The peer connect notify context created for this handle; can be NULL
134 struct ConnectNotifyContext *nctxt;
137 * The type of this cache-get request
139 enum CacheGetType type;
142 * Did we call the cache callback already?
153 * DLL next ptr for least recently used cache entries
155 struct CacheEntry *next;
158 * DLL prev ptr for least recently used cache entries
160 struct CacheEntry *prev;
163 * The transport handle to the peer corresponding to this entry; can be NULL
165 struct GNUNET_TRANSPORT_Handle *transport_handle_;
168 * The operation handle for transport handle
170 struct GNUNET_TESTBED_Operation *transport_op_;
173 * The core handle to the peer corresponding to this entry; can be NULL
175 struct GNUNET_CORE_Handle *core_handle;
178 * The operation handle for core handle
180 struct GNUNET_TESTBED_Operation *core_op;
183 * The peer identity of this peer. Will be set upon opening a connection to
184 * the peers CORE service. Will be NULL until then and after the CORE
185 * connection is closed
187 struct GNUNET_PeerIdentity *peer_identity;
190 * The configuration of the peer. Should be not NULL as long as the core_handle
191 * or transport_handle are valid
193 struct GNUNET_CONFIGURATION_Handle *cfg;
196 * The key for this entry
198 struct GNUNET_HashCode key;
203 struct GNUNET_MessageHeader *hello;
206 * the head of the CacheGetHandle queue
208 struct GSTCacheGetHandle *cgh_qhead;
211 * the tail of the CacheGetHandle queue
213 struct GSTCacheGetHandle *cgh_qtail;
216 * DLL head for the queue of notifications contexts to check which of them are to
217 * be notified when a peer is connected.
219 struct ConnectNotifyContext *nctxt_qhead;
222 * DLL tail for the queue of notifications contexts to check which of them are to
223 * be notified when a peer is connected.
225 struct ConnectNotifyContext *nctxt_qtail;
228 * The task that calls the cache callback
230 GNUNET_SCHEDULER_TaskIdentifier notify_task;
233 * Number of operations this cache entry is being used
238 * The id of the peer this entry corresponds to
240 unsigned int peer_id;
243 * Is this entry in LRU cache queue?
250 * Hashmap to maintain cache
252 static struct GNUNET_CONTAINER_MultiHashMap *cache;
255 * DLL head for least recently used cache entries; least recently used
256 * cache items are at the head. The cache enties are added to this queue when
257 * their demand becomes zero. They are removed from the queue when they are
258 * needed by any operation.
260 static struct CacheEntry *lru_cache_head;
263 * DLL tail for least recently used cache entries; recently used cache
264 * items are at the tail.The cache enties are added to this queue when
265 * their demand becomes zero. They are removed from the queue when they are
266 * needed by any operation.
268 static struct CacheEntry *lru_cache_tail;
271 * the size of the LRU queue
273 static unsigned int lru_cache_size;
276 * the threshold size for the LRU queue
278 static unsigned int lru_cache_threshold_size;
281 * The total number of elements in cache
283 static unsigned int cache_size;
287 * Looks up in the cache and returns the entry
289 * @param id the peer identity of the peer whose corresponding entry has to be looked up
290 * @return the HELLO message; NULL if not found
292 static struct CacheEntry *
293 cache_lookup (const struct GNUNET_HashCode *key)
295 struct CacheEntry *entry;
299 entry = GNUNET_CONTAINER_multihashmap_get (cache, key);
305 * Function to disconnect the core and transport handles; free the existing
306 * configuration; and remove from the LRU cache list. The entry is left to be in
307 * the hash table so that the HELLO can still be found later
309 * @param entry the cache entry
312 close_handles (struct CacheEntry *entry)
314 struct ConnectNotifyContext *ctxt;
316 GNUNET_assert (0 == entry->demand);
317 if (GNUNET_YES == entry->in_lru)
319 GNUNET_assert (0 < lru_cache_size);
320 GNUNET_CONTAINER_DLL_remove (lru_cache_head, lru_cache_tail, entry);
322 entry->in_lru = GNUNET_NO;
324 while (NULL != (ctxt = entry->nctxt_qhead))
326 GNUNET_CONTAINER_DLL_remove (entry->nctxt_qhead, entry->nctxt_qtail, ctxt);
329 LOG_DEBUG ("Cleaning up handles from an entry in cache\n");
330 if (NULL != entry->transport_handle_)
332 GNUNET_assert (NULL != entry->transport_op_);
333 GNUNET_TESTBED_operation_done (entry->transport_op_);
334 entry->transport_op_ = NULL;
336 if (NULL != entry->core_handle)
338 GNUNET_assert (NULL != entry->core_op);
339 GNUNET_TESTBED_operation_done (entry->core_op);
340 entry->core_op = NULL;
342 if (NULL != entry->cfg)
344 GNUNET_CONFIGURATION_destroy (entry->cfg);
351 * Creates a new cache entry and then puts it into the cache's hashtable.
353 * @param key the hash code to use for inserting the newly created entry
354 * @param peer_id the index of the peer to tag the newly created entry
355 * @return the newly created entry
357 static struct CacheEntry *
358 add_entry (const struct GNUNET_HashCode *key, unsigned int peer_id)
360 struct CacheEntry *entry;
362 entry = GNUNET_malloc (sizeof (struct CacheEntry));
363 entry->peer_id = peer_id;
364 memcpy (&entry->key, key, sizeof (struct GNUNET_HashCode));
365 GNUNET_assert (GNUNET_OK ==
366 GNUNET_CONTAINER_multihashmap_put (cache, &entry->key,
368 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
375 * Function to find a suitable GSTCacheGetHandle which is waiting for one of the
376 * handles in given entry to be available.
378 * @param entry the cache entry whose GSTCacheGetHandle list has to be searched
379 * @param head the starting list element in the GSTCacheGetHandle where the
380 * search has to be begin
381 * @return a suitable GSTCacheGetHandle whose handle ready notify callback
382 * hasn't been called yet. NULL if no such suitable GSTCacheGetHandle
385 static struct GSTCacheGetHandle *
386 search_suitable_cgh (const struct CacheEntry *entry,
387 const struct GSTCacheGetHandle *head)
389 const struct GSTCacheGetHandle *cgh;
391 for (cgh=head; NULL != cgh; cgh=cgh->next)
393 if (GNUNET_YES == cgh->notify_called)
397 case CGT_TRANSPORT_HANDLE:
398 if (NULL == entry->transport_handle_)
401 case CGT_CORE_HANDLE:
402 if (NULL == entry->core_handle)
408 return (struct GSTCacheGetHandle *) cgh;
413 * Task to call the handle ready notify callback of a queued GSTCacheGetHandle
414 * of an entry when one or all of its handles are available.
416 * @param cls the cache entry
417 * @param tc the task context from scheduler
420 call_cgh_cb (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
422 struct CacheEntry *entry = cls;
423 struct GSTCacheGetHandle *cgh;
424 const struct GSTCacheGetHandle *cgh2;
426 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != entry->notify_task);
427 entry->notify_task = GNUNET_SCHEDULER_NO_TASK;
428 cgh = search_suitable_cgh (entry, entry->cgh_qhead);
429 GNUNET_assert (NULL != cgh);
431 if (NULL != cgh->next)
432 cgh2 = search_suitable_cgh (entry, cgh->next);
433 GNUNET_CONTAINER_DLL_remove (entry->cgh_qhead, entry->cgh_qtail, cgh);
434 cgh->notify_called = GNUNET_YES;
435 GNUNET_CONTAINER_DLL_insert_tail (entry->cgh_qhead, entry->cgh_qtail, cgh);
437 entry->notify_task = GNUNET_SCHEDULER_add_now (&call_cgh_cb, entry);
438 if (NULL != cgh->nctxt)
439 {/* Register the peer connect notify callback */
440 GNUNET_CONTAINER_DLL_insert_tail (entry->nctxt_qhead, entry->nctxt_qtail,
443 LOG_DEBUG ("Calling notify for handle type %u\n", cgh->type);
444 cgh->cb (cgh->cb_cls, entry->core_handle,
445 entry->transport_handle_, entry->peer_identity);
450 * Function called from peer connect notify callbacks from CORE and TRANSPORT
451 * connections. This function calls the pendning peer connect notify callbacks
452 * which are queued in an entry.
454 * @param cls the cache entry
455 * @param peer the peer that connected
456 * @param type the type of the handle this notification corresponds to
459 peer_connect_notify_cb (void *cls,
460 const struct GNUNET_PeerIdentity *peer,
461 const enum CacheGetType type)
463 struct CacheEntry *entry = cls;
464 struct ConnectNotifyContext *ctxt;
465 struct ConnectNotifyContext *ctxt2;
466 GST_cache_peer_connect_notify cb;
470 for (ctxt=entry->nctxt_qhead; NULL != ctxt;)
472 GNUNET_assert (NULL != ctxt->cgh);
473 if (type != ctxt->cgh->type)
478 if (0 != memcmp (ctxt->target, peer, sizeof (struct GNUNET_PeerIdentity)))
484 cb_cls = ctxt->cb_cls;
485 ctxt->cgh->nctxt = NULL;
487 GNUNET_CONTAINER_DLL_remove (entry->nctxt_qhead, entry->nctxt_qtail, ctxt);
499 * Function called to notify transport users that another
500 * peer connected to us.
503 * @param peer the peer that connected
504 * @param ats performance data
505 * @param ats_count number of entries in ats (excluding 0-termination)
508 transport_peer_connect_notify_cb (void *cls,
509 const struct GNUNET_PeerIdentity *peer,
510 const struct GNUNET_ATS_Information *ats,
513 peer_connect_notify_cb (cls, peer, CGT_TRANSPORT_HANDLE);
518 * Function called when resources for opening a connection to TRANSPORT are
521 * @param cls the cache entry
524 opstart_get_handle_transport (void *cls)
526 struct CacheEntry *entry = cls;
528 GNUNET_assert (NULL != entry);
529 LOG_DEBUG ("Opening a transport connection to peer %u\n", entry->peer_id);
530 entry->transport_handle_ =
531 GNUNET_TRANSPORT_connect (entry->cfg,
534 &transport_peer_connect_notify_cb, NULL);
535 if (NULL == entry->transport_handle_)
540 if (0 == entry->demand)
542 if (GNUNET_SCHEDULER_NO_TASK != entry->notify_task)
544 if (NULL != search_suitable_cgh (entry, entry->cgh_qhead))
545 entry->notify_task = GNUNET_SCHEDULER_add_now (&call_cgh_cb, entry);
550 * Function called when the operation responsible for opening a TRANSPORT
551 * connection is marked as done.
553 * @param cls the cache entry
556 oprelease_get_handle_transport (void *cls)
558 struct CacheEntry *entry = cls;
560 if (NULL == entry->transport_handle_)
562 GNUNET_TRANSPORT_disconnect (entry->transport_handle_);
563 entry->transport_handle_ = NULL;
568 * Function called after GNUNET_CORE_connect has succeeded (or failed
569 * for good). Note that the private key of the peer is intentionally
570 * not exposed here; if you need it, your process should try to read
571 * the private key file directly (which should work if you are
572 * authorized...). Implementations of this function must not call
573 * GNUNET_CORE_disconnect (other than by scheduling a new task to
577 * @param server handle to the server, NULL if we failed
578 * @param my_identity ID of this peer, NULL if we failed
581 core_startup_cb (void *cls,
582 struct GNUNET_CORE_Handle * server,
583 const struct GNUNET_PeerIdentity *my_identity)
585 struct CacheEntry *entry = cls;
587 if (NULL == my_identity)
592 GNUNET_assert (NULL == entry->peer_identity);
593 entry->core_handle = server;
594 entry->peer_identity = GNUNET_malloc (sizeof (struct GNUNET_PeerIdentity));
595 memcpy (entry->peer_identity, my_identity,
596 sizeof (struct GNUNET_PeerIdentity));
597 if (0 == entry->demand)
599 if (GNUNET_SCHEDULER_NO_TASK != entry->notify_task)
601 if (NULL != search_suitable_cgh (entry, entry->cgh_qhead))
602 entry->notify_task = GNUNET_SCHEDULER_add_now (&call_cgh_cb, entry);
607 * Method called whenever a given peer connects at CORE level
610 * @param peer peer identity this notification is about
611 * @param atsi performance data for the connection
612 * @param atsi_count number of records in 'atsi'
615 core_peer_connect_cb (void *cls,
616 const struct GNUNET_PeerIdentity * peer,
617 const struct GNUNET_ATS_Information * atsi,
618 unsigned int atsi_count)
620 peer_connect_notify_cb (cls, peer, CGT_CORE_HANDLE);
625 * Function called when resources for opening a connection to CORE are
628 * @param cls the cache entry
631 opstart_get_handle_core (void *cls)
633 struct CacheEntry *entry = cls;
634 const struct GNUNET_CORE_MessageHandler no_handlers[] = {
638 GNUNET_assert (NULL != entry);
639 LOG_DEBUG ("Opening a CORE connection to peer %u\n", entry->peer_id);
640 /* void?: We also get the handle when the connection to CORE is successful */
641 (void) GNUNET_CORE_connect (entry->cfg,
644 &core_peer_connect_cb,
645 NULL, /* disconnect cb */
646 NULL, /* inbound notify */
648 NULL, /* outbound notify */
651 //GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == entry->notify_task);
656 * Function called when the operation responsible for opening a TRANSPORT
657 * connection is marked as done.
659 * @param cls the cache entry
662 oprelease_get_handle_core (void *cls)
664 struct CacheEntry *entry = cls;
666 if (NULL == entry->core_handle)
668 GNUNET_CORE_disconnect (entry->core_handle);
669 entry->core_handle = NULL;
670 GNUNET_free_non_null (entry->peer_identity);
671 entry->peer_identity = NULL;
676 * Function to get a handle with given configuration. The type of the handle is
677 * implicitly provided in the GSTCacheGetHandle. If the handle is already cached
678 * before, it will be retured in the given callback; the peer_id is used to
679 * lookup in the cache; if not, a new operation is started to open the transport
680 * handle and will be given in the callback when it is available.
682 * @param cls the cache entry
684 static struct GSTCacheGetHandle *
685 cache_get_handle (unsigned int peer_id,
686 struct GSTCacheGetHandle *cgh,
687 const struct GNUNET_CONFIGURATION_Handle *cfg,
688 const struct GNUNET_PeerIdentity *target,
689 GST_cache_peer_connect_notify connect_notify_cb,
690 void *connect_notify_cb_cls)
692 struct GNUNET_HashCode key;
694 struct CacheEntry *entry;
695 struct ConnectNotifyContext *ctxt;
696 struct GNUNET_TESTBED_Operation *op;
698 GNUNET_assert (0 != cgh->type);
699 GNUNET_CRYPTO_hash (&peer_id, sizeof (peer_id), &key);
701 entry = cache_lookup (&key);
704 if (GNUNET_YES == entry->in_lru)
706 GNUNET_assert (0 == entry->demand);
707 GNUNET_assert (0 < lru_cache_size);
708 GNUNET_CONTAINER_DLL_remove (lru_cache_head, lru_cache_tail, entry);
710 entry->in_lru = GNUNET_NO;
714 case CGT_TRANSPORT_HANDLE:
715 handle = entry->transport_handle_;
717 LOG_DEBUG ("Found TRANSPORT handle in cache for peer %u\n", entry->peer_id);
719 case CGT_CORE_HANDLE:
720 handle = entry->core_handle;
722 LOG_DEBUG ("Found CORE handle in cache for peer %u\n", entry->peer_id);
727 entry = add_entry (&key, peer_id);
728 if (NULL == entry->cfg)
729 entry->cfg = GNUNET_CONFIGURATION_dup (cfg);
732 GNUNET_CONTAINER_DLL_insert (entry->cgh_qhead, entry->cgh_qtail, cgh);
733 if ((NULL != target) && (NULL != connect_notify_cb))
735 ctxt = GNUNET_malloc (sizeof (struct ConnectNotifyContext));
736 ctxt->target = target;
737 ctxt->cb = connect_notify_cb;
738 ctxt->cb_cls = connect_notify_cb_cls;
739 GNUNET_assert (NULL == cgh->nctxt);
745 if (GNUNET_SCHEDULER_NO_TASK == entry->notify_task)
746 entry->notify_task = GNUNET_SCHEDULER_add_now (&call_cgh_cb, entry);
751 case CGT_TRANSPORT_HANDLE:
752 if (NULL != entry->transport_op_)
754 op = GNUNET_TESTBED_operation_create_ (entry, &opstart_get_handle_transport,
755 &oprelease_get_handle_transport);
756 entry->transport_op_ = op;
758 case CGT_CORE_HANDLE:
759 if (NULL != entry->core_op)
761 op = GNUNET_TESTBED_operation_create_ (entry, &opstart_get_handle_core,
762 &oprelease_get_handle_core);
766 GNUNET_TESTBED_operation_queue_insert_ (GST_opq_openfds, op);
767 GNUNET_TESTBED_operation_begin_wait_ (op);
773 * Iterator over hash map entries.
776 * @param key current key code
777 * @param value value in the hash map
778 * @return GNUNET_YES if we should continue to
783 cache_clear_iterator (void *cls,
784 const struct GNUNET_HashCode * key,
787 struct CacheEntry *entry = value;
788 static unsigned int ncleared;
790 GNUNET_assert (NULL != entry);
791 GNUNET_break (0 == entry->demand);
792 LOG_DEBUG ("Clearing entry %u of %u\n", ++ncleared, cache_size);
793 GNUNET_CONTAINER_multihashmap_remove (cache, key, value);
794 if (0 == entry->demand)
795 close_handles (entry);
796 GNUNET_free_non_null (entry->hello);
797 GNUNET_break (NULL == entry->transport_handle_);
798 GNUNET_break (NULL == entry->transport_op_);
799 GNUNET_break (NULL == entry->core_handle);
800 GNUNET_break (NULL == entry->core_op);
801 GNUNET_break (NULL == entry->cfg);
802 GNUNET_assert (NULL == entry->cgh_qhead);
803 GNUNET_assert (NULL == entry->cgh_qtail);
804 GNUNET_assert (NULL == entry->nctxt_qhead);
805 GNUNET_assert (NULL == entry->nctxt_qtail);
817 GNUNET_CONTAINER_multihashmap_iterate (cache, &cache_clear_iterator, NULL);
818 GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size (cache));
819 GNUNET_CONTAINER_multihashmap_destroy (cache);
824 * Initializes the cache
826 * @param size the size of the cache
829 GST_cache_init (unsigned int size)
833 lru_cache_threshold_size = size;
836 cache = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_YES);
841 * Mark the GetCacheHandle as being done if a handle has been provided already
842 * or as being cancelled if the callback for the handle hasn't been called.
844 * @param cgh the CacheGetHandle handle
847 GST_cache_get_handle_done (struct GSTCacheGetHandle *cgh)
849 struct CacheEntry *entry;
852 GNUNET_assert (NULL != entry);
853 GNUNET_assert (0 < entry->demand);
855 if (GNUNET_SCHEDULER_NO_TASK != entry->notify_task)
857 GNUNET_SCHEDULER_cancel (entry->notify_task);
858 entry->notify_task = GNUNET_SCHEDULER_NO_TASK;
860 GNUNET_CONTAINER_DLL_remove (entry->cgh_qhead, entry->cgh_qtail, cgh);
861 if (NULL != cgh->nctxt)
863 GNUNET_assert (cgh == cgh->nctxt->cgh);
864 if (GNUNET_YES == cgh->notify_called)
865 GNUNET_CONTAINER_DLL_remove (entry->nctxt_qhead, entry->nctxt_qtail, cgh->nctxt);
866 GNUNET_free (cgh->nctxt);
869 if (0 == entry->demand)
871 GNUNET_CONTAINER_DLL_insert_tail (lru_cache_head, lru_cache_tail, entry);
873 entry->in_lru = GNUNET_YES;
874 if (lru_cache_size > lru_cache_threshold_size)
875 close_handles (lru_cache_head);
879 struct GSTCacheGetHandle *cgh2;
881 if (NULL != (cgh2 = search_suitable_cgh (entry, entry->cgh_qhead)))
882 entry->notify_task = GNUNET_SCHEDULER_add_now (&call_cgh_cb, entry);
888 * Get a transport handle with the given configuration. If the handle is
889 * already cached before, it will be retured in the given callback; the peer_id
890 * is used to lookup in the cache; if not, a new operation is started to open the
891 * transport handle and will be given in the callback when it is available.
893 * @param peer_id the index of the peer
894 * @param cfg the configuration with which the transport handle has to be
895 * created if it was not present in the cache
896 * @param cb the callback to notify when the transport handle is available
897 * @param cb_cls the closure for the above callback
898 * @param target the peer identify of the peer whose connection to our TRANSPORT
899 * subsystem will be notified through the connect_notify_cb. Can be NULL
900 * @param connect_notify_cb the callback to call when the given target peer is
901 * connected. This callback will only be called once or never again (in
902 * case the target peer cannot be connected). Can be NULL
903 * @param connect_notify_cb_cls the closure for the above callback
904 * @return the handle which can be used cancel or mark that the handle is no
907 struct GSTCacheGetHandle *
908 GST_cache_get_handle_transport (unsigned int peer_id,
909 const struct GNUNET_CONFIGURATION_Handle *cfg,
910 GST_cache_handle_ready_cb cb,
912 const struct GNUNET_PeerIdentity *target,
913 GST_cache_peer_connect_notify connect_notify_cb,
914 void *connect_notify_cb_cls)
916 struct GSTCacheGetHandle *cgh;
918 cgh = GNUNET_malloc (sizeof (struct GSTCacheGetHandle));
920 cgh->cb_cls = cb_cls;
921 cgh->type = CGT_TRANSPORT_HANDLE;
922 return cache_get_handle (peer_id, cgh, cfg,
923 target, connect_notify_cb, connect_notify_cb_cls);
928 * Get a CORE handle with the given configuration. If the handle is already
929 * cached before, it will be retured in the given callback; the peer_id is used
930 * to lookup in the cache. If the handle is not cached before, a new operation
931 * is started to open the CORE handle and will be given in the callback when it
932 * is available along with the peer identity
934 * @param peer_id the index of the peer
935 * @param cfg the configuration with which the transport handle has to be
936 * created if it was not present in the cache
937 * @param cb the callback to notify when the transport handle is available
938 * @param cb_cls the closure for the above callback
939 * @param target the peer identify of the peer whose connection to our CORE
940 * subsystem will be notified through the connect_notify_cb. Can be NULL
941 * @param connect_notify_cb the callback to call when the given target peer is
942 * connected. This callback will only be called once or never again (in
943 * case the target peer cannot be connected). Can be NULL
944 * @param connect_notify_cb_cls the closure for the above callback
945 * @return the handle which can be used cancel or mark that the handle is no
948 struct GSTCacheGetHandle *
949 GST_cache_get_handle_core (unsigned int peer_id,
950 const struct GNUNET_CONFIGURATION_Handle *cfg,
951 GST_cache_handle_ready_cb cb,
953 const struct GNUNET_PeerIdentity *target,
954 GST_cache_peer_connect_notify connect_notify_cb,
955 void *connect_notify_cb_cls)
957 struct GSTCacheGetHandle *cgh;
959 cgh = GNUNET_malloc (sizeof (struct GSTCacheGetHandle));
961 cgh->cb_cls = cb_cls;
962 cgh->type = CGT_CORE_HANDLE;
963 return cache_get_handle (peer_id, cgh, cfg,
964 target, connect_notify_cb, connect_notify_cb_cls);
969 * Looks up in the hello cache and returns the HELLO of the given peer
971 * @param peer_id the index of the peer whose HELLO has to be looked up
972 * @return the HELLO message; NULL if not found
974 const struct GNUNET_MessageHeader *
975 GST_cache_lookup_hello (const unsigned int peer_id)
977 struct CacheEntry *entry;
978 struct GNUNET_HashCode key;
980 LOG_DEBUG ("Looking up HELLO for peer %u\n", peer_id);
981 GNUNET_CRYPTO_hash (&peer_id, sizeof (peer_id), &key);
982 entry = cache_lookup (&key);
985 if (NULL != entry->hello)
986 LOG_DEBUG ("HELLO found for peer %u\n", peer_id);
992 * Caches the HELLO of the given peer. Updates the HELLO if it was already
995 * @param id the peer identity of the peer whose HELLO has to be cached
996 * @param hello the HELLO message
999 GST_cache_add_hello (const unsigned int peer_id,
1000 const struct GNUNET_MessageHeader *hello)
1002 struct CacheEntry *entry;
1003 struct GNUNET_HashCode key;
1005 GNUNET_CRYPTO_hash (&peer_id, sizeof (peer_id), &key);
1006 entry = GNUNET_CONTAINER_multihashmap_get (cache, &key);
1008 entry = add_entry (&key, peer_id);
1009 GNUNET_free_non_null (entry->hello);
1010 entry->hello = GNUNET_copy_message (hello);
1013 /* end of gnunet-service-testbed_hc.c */