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3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
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22 * @file fs/gnunet-service-fs.c
23 * @brief gnunet anonymity protocol implementation
24 * @author Christian Grothoff
27 * - TTL/priority calculations are absent!
29 * - have non-zero preference / priority for requests we initiate!
30 * - track stats for hot-path routing
31 * - implement hot-path routing decision procedure
32 * - implement: bound_priority, test_load_too_high, validate_nblock
33 * - add content migration support (store locally) [or create new service]
38 #include "gnunet_constants.h"
39 #include "gnunet_core_service.h"
40 #include "gnunet_datastore_service.h"
41 #include "gnunet_peer_lib.h"
42 #include "gnunet_protocols.h"
43 #include "gnunet_signatures.h"
44 #include "gnunet_statistics_service.h"
45 #include "gnunet_util_lib.h"
46 #include "gnunet-service-fs_drq.h"
47 #include "gnunet-service-fs_indexing.h"
50 #define DEBUG_FS GNUNET_YES
53 * Maximum number of outgoing messages we queue per peer.
54 * FIXME: make configurable?
56 #define MAX_QUEUE_PER_PEER 16
59 * Inverse of the probability that we will submit the same query
60 * to the same peer again. If the same peer already got the query
61 * repeatedly recently, the probability is multiplied by the inverse
62 * of this number each time. Note that we only try about every TTL_DECREMENT/2
63 * plus MAX_CORK_DELAY (so roughly every 3.5s).
65 #define RETRY_PROBABILITY_INV 3
68 * What is the maximum delay for a P2P FS message (in our interaction
69 * with core)? FS-internal delays are another story. The value is
70 * chosen based on the 32k block size. Given that peers typcially
71 * have at least 1 kb/s bandwidth, 45s waits give us a chance to
72 * transmit one message even to the lowest-bandwidth peers.
74 #define MAX_TRANSMIT_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 45)
79 * Maximum number of requests (from other peers) that we're
80 * willing to have pending at any given point in time.
81 * FIXME: set from configuration.
83 static uint64_t max_pending_requests = (32 * 1024);
87 * Information we keep for each pending reply. The
88 * actual message follows at the end of this struct.
90 struct PendingMessage;
94 * Function called upon completion of a transmission.
97 * @param pid ID of receiving peer, 0 on transmission error
99 typedef void (*TransmissionContinuation)(void * cls,
100 GNUNET_PEER_Id tpid);
104 * Information we keep for each pending message (GET/PUT). The
105 * actual message follows at the end of this struct.
107 struct PendingMessage
110 * This is a doubly-linked list of messages to the same peer.
112 struct PendingMessage *next;
115 * This is a doubly-linked list of messages to the same peer.
117 struct PendingMessage *prev;
120 * Entry in pending message list for this pending message.
122 struct PendingMessageList *pml;
125 * Function to call immediately once we have transmitted this
128 TransmissionContinuation cont;
136 * Size of the reply; actual reply message follows
137 * at the end of this struct.
142 * How important is this message for us?
150 * Information about a peer that we are connected to.
151 * We track data that is useful for determining which
152 * peers should receive our requests. We also keep
153 * a list of messages to transmit to this peer.
159 * List of the last clients for which this peer successfully
162 struct GNUNET_SERVER_Client *last_client_replies[CS2P_SUCCESS_LIST_SIZE];
165 * List of the last PIDs for which
166 * this peer successfully answered a query;
167 * We use 0 to indicate no successful reply.
169 GNUNET_PEER_Id last_p2p_replies[P2P_SUCCESS_LIST_SIZE];
172 * Average delay between sending the peer a request and
173 * getting a reply (only calculated over the requests for
174 * which we actually got a reply). Calculated
175 * as a moving average: new_delay = ((n-1)*last_delay+curr_delay) / n
177 struct GNUNET_TIME_Relative avg_delay;
180 * Handle for an active request for transmission to this
183 struct GNUNET_CORE_TransmitHandle *cth;
186 * Messages (replies, queries, content migration) we would like to
187 * send to this peer in the near future. Sorted by priority, head.
189 struct PendingMessage *pending_messages_head;
192 * Messages (replies, queries, content migration) we would like to
193 * send to this peer in the near future. Sorted by priority, tail.
195 struct PendingMessage *pending_messages_tail;
198 * Average priority of successful replies. Calculated
199 * as a moving average: new_avg = ((n-1)*last_avg+curr_prio) / n
204 * Increase in traffic preference still to be submitted
205 * to the core service for this peer. FIXME: double or 'uint64_t'?
207 double inc_preference;
210 * The peer's identity.
215 * Size of the linked list of 'pending_messages'.
217 unsigned int pending_requests;
220 * Which offset in "last_p2p_replies" will be updated next?
221 * (we go round-robin).
223 unsigned int last_p2p_replies_woff;
226 * Which offset in "last_client_replies" will be updated next?
227 * (we go round-robin).
229 unsigned int last_client_replies_woff;
235 * Information we keep for each pending request. We should try to
236 * keep this struct as small as possible since its memory consumption
237 * is key to how many requests we can have pending at once.
239 struct PendingRequest;
243 * Doubly-linked list of requests we are performing
244 * on behalf of the same client.
246 struct ClientRequestList
250 * This is a doubly-linked list.
252 struct ClientRequestList *next;
255 * This is a doubly-linked list.
257 struct ClientRequestList *prev;
260 * Request this entry represents.
262 struct PendingRequest *req;
265 * Client list this request belongs to.
267 struct ClientList *client_list;
273 * Replies to be transmitted to the client. The actual
274 * response message is allocated after this struct.
276 struct ClientResponseMessage
279 * This is a doubly-linked list.
281 struct ClientResponseMessage *next;
284 * This is a doubly-linked list.
286 struct ClientResponseMessage *prev;
289 * Client list entry this response belongs to.
291 struct ClientList *client_list;
294 * Number of bytes in the response.
301 * Linked list of clients we are performing requests
307 * This is a linked list.
309 struct ClientList *next;
312 * ID of a client making a request, NULL if this entry is for a
315 struct GNUNET_SERVER_Client *client;
318 * Head of list of requests performed on behalf
319 * of this client right now.
321 struct ClientRequestList *rl_head;
324 * Tail of list of requests performed on behalf
325 * of this client right now.
327 struct ClientRequestList *rl_tail;
330 * Head of linked list of responses.
332 struct ClientResponseMessage *res_head;
335 * Tail of linked list of responses.
337 struct ClientResponseMessage *res_tail;
340 * Context for sending replies.
342 struct GNUNET_CONNECTION_TransmitHandle *th;
348 * Doubly-linked list of messages we are performing
349 * due to a pending request.
351 struct PendingMessageList
355 * This is a doubly-linked list of messages on behalf of the same request.
357 struct PendingMessageList *next;
360 * This is a doubly-linked list of messages on behalf of the same request.
362 struct PendingMessageList *prev;
365 * Message this entry represents.
367 struct PendingMessage *pm;
370 * Request this entry belongs to.
372 struct PendingRequest *req;
375 * Peer this message is targeted for.
377 struct ConnectedPeer *target;
383 * Information we keep for each pending request. We should try to
384 * keep this struct as small as possible since its memory consumption
385 * is key to how many requests we can have pending at once.
387 struct PendingRequest
391 * If this request was made by a client, this is our entry in the
392 * client request list; otherwise NULL.
394 struct ClientRequestList *client_request_list;
397 * Entry of peer responsible for this entry (if this request
398 * was made by a peer).
400 struct ConnectedPeer *cp;
403 * If this is a namespace query, pointer to the hash of the public
404 * key of the namespace; otherwise NULL. Pointer will be to the
405 * end of this struct (so no need to free it).
407 const GNUNET_HashCode *namespace;
410 * Bloomfilter we use to filter out replies that we don't care about
411 * (anymore). NULL as long as we are interested in all replies.
413 struct GNUNET_CONTAINER_BloomFilter *bf;
416 * Context of our GNUNET_CORE_peer_change_preference call.
418 struct GNUNET_CORE_InformationRequestContext *irc;
421 * Hash code of all replies that we have seen so far (only valid
422 * if client is not NULL since we only track replies like this for
425 GNUNET_HashCode *replies_seen;
428 * Node in the heap representing this entry; NULL
429 * if we have no heap node.
431 struct GNUNET_CONTAINER_HeapNode *hnode;
434 * Head of list of messages being performed on behalf of this
437 struct PendingMessageList *pending_head;
440 * Tail of list of messages being performed on behalf of this
443 struct PendingMessageList *pending_tail;
446 * When did we first see this request (form this peer), or, if our
447 * client is initiating, when did we last initiate a search?
449 struct GNUNET_TIME_Absolute start_time;
452 * The query that this request is for.
454 GNUNET_HashCode query;
457 * The task responsible for transmitting queries
460 GNUNET_SCHEDULER_TaskIdentifier task;
463 * (Interned) Peer identifier that identifies a preferred target
466 GNUNET_PEER_Id target_pid;
469 * (Interned) Peer identifiers of peers that have already
470 * received our query for this content.
472 GNUNET_PEER_Id *used_pids;
475 * Our entry in the DRQ (non-NULL while we wait for our
476 * turn to interact with the local database).
478 struct DatastoreRequestQueue *drq;
481 * Size of the 'bf' (in bytes).
486 * Desired anonymity level; only valid for requests from a local client.
488 uint32_t anonymity_level;
491 * How many entries in "used_pids" are actually valid?
493 unsigned int used_pids_off;
496 * How long is the "used_pids" array?
498 unsigned int used_pids_size;
501 * Number of results found for this request.
503 unsigned int results_found;
506 * How many entries in "replies_seen" are actually valid?
508 unsigned int replies_seen_off;
511 * How long is the "replies_seen" array?
513 unsigned int replies_seen_size;
516 * Priority with which this request was made. If one of our clients
517 * made the request, then this is the current priority that we are
518 * using when initiating the request. This value is used when
519 * we decide to reward other peers with trust for providing a reply.
524 * Priority points left for us to spend when forwarding this request
527 uint32_t remaining_priority;
530 * Number to mingle hashes for bloom-filter tests with.
535 * TTL with which we saw this request (or, if we initiated, TTL that
536 * we used for the request).
541 * Type of the content that this request is for.
543 enum GNUNET_BLOCK_Type type;
546 * Remove this request after transmission of the current response.
551 * GNUNET_YES if we should not forward this request to other peers.
561 static struct GNUNET_SCHEDULER_Handle *sched;
566 static const struct GNUNET_CONFIGURATION_Handle *cfg;
569 * Map of peer identifiers to "struct ConnectedPeer" (for that peer).
571 static struct GNUNET_CONTAINER_MultiHashMap *connected_peers;
574 * Map of peer identifiers to "struct PendingRequest" (for that peer).
576 static struct GNUNET_CONTAINER_MultiHashMap *peer_request_map;
579 * Map of query identifiers to "struct PendingRequest" (for that query).
581 static struct GNUNET_CONTAINER_MultiHashMap *query_request_map;
584 * Heap with the request that will expire next at the top. Contains
585 * pointers of type "struct PendingRequest*"; these will *also* be
586 * aliased from the "requests_by_peer" data structures and the
587 * "requests_by_query" table. Note that requests from our clients
588 * don't expire and are thus NOT in the "requests_by_expiration"
589 * (or the "requests_by_peer" tables).
591 static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
594 * Handle for reporting statistics.
596 static struct GNUNET_STATISTICS_Handle *stats;
599 * Linked list of clients we are currently processing requests for.
601 static struct ClientList *client_list;
604 * Pointer to handle to the core service (points to NULL until we've
607 static struct GNUNET_CORE_Handle *core;
610 /* ******************* clean up functions ************************ */
614 * We're done with a particular message list entry.
615 * Free all associated resources.
617 * @param pml entry to destroy
620 destroy_pending_message_list_entry (struct PendingMessageList *pml)
622 GNUNET_CONTAINER_DLL_remove (pml->req->pending_head,
623 pml->req->pending_tail,
625 GNUNET_CONTAINER_DLL_remove (pml->target->pending_messages_head,
626 pml->target->pending_messages_tail,
628 pml->target->pending_requests--;
629 GNUNET_free (pml->pm);
635 * Destroy the given pending message (and call the respective
638 * @param pm message to destroy
639 * @param tpid id of peer that the message was delivered to, or 0 for none
642 destroy_pending_message (struct PendingMessage *pm,
645 struct PendingMessageList *pml = pm->pml;
646 TransmissionContinuation cont;
649 GNUNET_assert (pml->pm == pm);
650 GNUNET_assert ( (tpid == 0) || (tpid == pml->target->pid) );
652 cont_cls = pm->cont_cls;
653 destroy_pending_message_list_entry (pml);
654 cont (cont_cls, tpid);
659 * We're done processing a particular request.
660 * Free all associated resources.
662 * @param pr request to destroy
665 destroy_pending_request (struct PendingRequest *pr)
667 struct GNUNET_PeerIdentity pid;
669 if (pr->hnode != NULL)
671 GNUNET_CONTAINER_heap_remove_node (requests_by_expiration_heap,
675 if (NULL == pr->client_request_list)
677 GNUNET_STATISTICS_update (stats,
678 gettext_noop ("# P2P searches active"),
684 GNUNET_STATISTICS_update (stats,
685 gettext_noop ("# client searches active"),
689 /* might have already been removed from map in 'process_reply' (if
690 there was a unique reply) or never inserted if it was a
691 duplicate; hence ignore the return value here */
692 (void) GNUNET_CONTAINER_multihashmap_remove (query_request_map,
697 GNUNET_FS_drq_get_cancel (pr->drq);
700 if (pr->client_request_list != NULL)
702 GNUNET_CONTAINER_DLL_remove (pr->client_request_list->client_list->rl_head,
703 pr->client_request_list->client_list->rl_tail,
704 pr->client_request_list);
705 GNUNET_free (pr->client_request_list);
706 pr->client_request_list = NULL;
710 GNUNET_PEER_resolve (pr->cp->pid,
712 (void) GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
719 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
724 GNUNET_CORE_peer_change_preference_cancel (pr->irc);
727 if (pr->replies_seen != NULL)
729 GNUNET_free (pr->replies_seen);
730 pr->replies_seen = NULL;
732 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
734 GNUNET_SCHEDULER_cancel (sched,
736 pr->task = GNUNET_SCHEDULER_NO_TASK;
738 while (NULL != pr->pending_head)
739 destroy_pending_message_list_entry (pr->pending_head);
740 GNUNET_PEER_change_rc (pr->target_pid, -1);
741 if (pr->used_pids != NULL)
743 GNUNET_PEER_decrement_rcs (pr->used_pids, pr->used_pids_off);
744 GNUNET_free (pr->used_pids);
745 pr->used_pids_off = 0;
746 pr->used_pids_size = 0;
747 pr->used_pids = NULL;
754 * Method called whenever a given peer connects.
756 * @param cls closure, not used
757 * @param peer peer identity this notification is about
758 * @param latency reported latency of the connection with 'other'
759 * @param distance reported distance (DV) to 'other'
762 peer_connect_handler (void *cls,
764 GNUNET_PeerIdentity * peer,
765 struct GNUNET_TIME_Relative latency,
768 struct ConnectedPeer *cp;
770 cp = GNUNET_malloc (sizeof (struct ConnectedPeer));
771 cp->pid = GNUNET_PEER_intern (peer);
772 GNUNET_CONTAINER_multihashmap_put (connected_peers,
775 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
780 * Free (each) request made by the peer.
782 * @param cls closure, points to peer that the request belongs to
783 * @param key current key code
784 * @param value value in the hash map
785 * @return GNUNET_YES (we should continue to iterate)
788 destroy_request (void *cls,
789 const GNUNET_HashCode * key,
792 const struct GNUNET_PeerIdentity * peer = cls;
793 struct PendingRequest *pr = value;
795 GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
798 destroy_pending_request (pr);
804 * Method called whenever a peer disconnects.
806 * @param cls closure, not used
807 * @param peer peer identity this notification is about
810 peer_disconnect_handler (void *cls,
812 GNUNET_PeerIdentity * peer)
814 struct ConnectedPeer *cp;
815 struct PendingMessage *pm;
818 GNUNET_CONTAINER_multihashmap_get_multiple (peer_request_map,
822 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
826 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
828 if (NULL != cp->last_client_replies[i])
830 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
831 cp->last_client_replies[i] = NULL;
834 GNUNET_CONTAINER_multihashmap_remove (connected_peers,
837 GNUNET_PEER_change_rc (cp->pid, -1);
838 GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
840 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
841 while (NULL != (pm = cp->pending_messages_head))
842 destroy_pending_message (pm, 0 /* delivery failed */);
843 GNUNET_break (0 == cp->pending_requests);
849 * Iterator over hash map entries that removes all occurences
850 * of the given 'client' from the 'last_client_replies' of the
851 * given connected peer.
853 * @param cls closure, the 'struct GNUNET_SERVER_Client*' to remove
854 * @param key current key code (unused)
855 * @param value value in the hash map (the 'struct ConnectedPeer*' to change)
856 * @return GNUNET_YES (we should continue to iterate)
859 remove_client_from_last_client_replies (void *cls,
860 const GNUNET_HashCode * key,
863 struct GNUNET_SERVER_Client *client = cls;
864 struct ConnectedPeer *cp = value;
867 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
869 if (cp->last_client_replies[i] == client)
871 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
872 cp->last_client_replies[i] = NULL;
880 * A client disconnected. Remove all of its pending queries.
882 * @param cls closure, NULL
883 * @param client identification of the client
886 handle_client_disconnect (void *cls,
887 struct GNUNET_SERVER_Client
890 struct ClientList *pos;
891 struct ClientList *prev;
892 struct ClientRequestList *rcl;
893 struct ClientResponseMessage *creply;
899 while ( (NULL != pos) &&
900 (pos->client != client) )
906 return; /* no requests pending for this client */
907 while (NULL != (rcl = pos->rl_head))
909 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
910 "Destroying pending request `%s' on disconnect\n",
911 GNUNET_h2s (&rcl->req->query));
912 destroy_pending_request (rcl->req);
915 client_list = pos->next;
917 prev->next = pos->next;
920 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
923 while (NULL != (creply = pos->res_head))
925 GNUNET_CONTAINER_DLL_remove (pos->res_head,
928 GNUNET_free (creply);
930 GNUNET_SERVER_client_drop (pos->client);
932 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
933 &remove_client_from_last_client_replies,
939 * Iterator to free peer entries.
941 * @param cls closure, unused
942 * @param key current key code
943 * @param value value in the hash map (peer entry)
944 * @return GNUNET_YES (we should continue to iterate)
947 clean_peer (void *cls,
948 const GNUNET_HashCode * key,
951 peer_disconnect_handler (NULL, (const struct GNUNET_PeerIdentity*) key);
957 * Task run during shutdown.
963 shutdown_task (void *cls,
964 const struct GNUNET_SCHEDULER_TaskContext *tc)
966 while (client_list != NULL)
967 handle_client_disconnect (NULL,
968 client_list->client);
969 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
972 GNUNET_break (0 == GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap));
973 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
974 requests_by_expiration_heap = 0;
975 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
976 connected_peers = NULL;
977 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
978 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
979 query_request_map = NULL;
980 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
981 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
982 peer_request_map = NULL;
983 GNUNET_assert (NULL != core);
984 GNUNET_CORE_disconnect (core);
988 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
996 /* ******************* Utility functions ******************** */
1000 * Transmit the given message by copying it to the target buffer
1001 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1002 * for writing in the meantime. In that case, do nothing
1003 * (the disconnect or shutdown handler will take care of the rest).
1004 * If we were able to transmit messages and there are still more
1005 * pending, ask core again for further calls to this function.
1007 * @param cls closure, pointer to the 'struct ConnectedPeer*'
1008 * @param size number of bytes available in buf
1009 * @param buf where the callee should write the message
1010 * @return number of bytes written to buf
1013 transmit_to_peer (void *cls,
1014 size_t size, void *buf)
1016 struct ConnectedPeer *cp = cls;
1018 struct GNUNET_PeerIdentity pid;
1019 struct PendingMessage *pm;
1026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1027 "Dropping message, core too busy.\n");
1032 while ( (NULL != (pm = cp->pending_messages_head) ) &&
1033 (pm->msize <= size) )
1035 memcpy (&cbuf[msize], &pm[1], pm->msize);
1038 destroy_pending_message (pm, cp->pid);
1042 GNUNET_PEER_resolve (cp->pid,
1044 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1046 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1054 "Transmitting %u bytes to peer %u.\n",
1063 * Add a message to the set of pending messages for the given peer.
1065 * @param cp peer to send message to
1066 * @param pm message to queue
1067 * @param pr request on which behalf this message is being queued
1070 add_to_pending_messages_for_peer (struct ConnectedPeer *cp,
1071 struct PendingMessage *pm,
1072 struct PendingRequest *pr)
1074 struct PendingMessage *pos;
1075 struct PendingMessageList *pml;
1076 struct GNUNET_PeerIdentity pid;
1078 GNUNET_assert (pm->next == NULL);
1079 GNUNET_assert (pm->pml == NULL);
1080 pml = GNUNET_malloc (sizeof (struct PendingMessageList));
1085 GNUNET_CONTAINER_DLL_insert (pr->pending_head,
1088 pos = cp->pending_messages_head;
1089 while ( (pos != NULL) &&
1090 (pm->priority < pos->priority) )
1092 GNUNET_CONTAINER_DLL_insert_after (cp->pending_messages_head,
1093 cp->pending_messages_tail,
1096 cp->pending_requests++;
1097 if (cp->pending_requests > MAX_QUEUE_PER_PEER)
1098 destroy_pending_message (cp->pending_messages_tail, 0);
1099 if (cp->cth == NULL)
1101 /* need to schedule transmission */
1102 GNUNET_PEER_resolve (cp->pid, &pid);
1103 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1104 cp->pending_messages_head->priority,
1107 cp->pending_messages_head->msize,
1111 if (cp->cth == NULL)
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1115 "Failed to schedule transmission with core!\n");
1117 /* FIXME: call stats (rare, bad case) */
1123 * Mingle hash with the mingle_number to produce different bits.
1126 mingle_hash (const GNUNET_HashCode * in,
1127 int32_t mingle_number,
1128 GNUNET_HashCode * hc)
1132 GNUNET_CRYPTO_hash (&mingle_number,
1135 GNUNET_CRYPTO_hash_xor (&m, in, hc);
1140 * Test if the load on this peer is too high
1141 * to even consider processing the query at
1144 * @return GNUNET_YES if the load is too high, GNUNET_NO otherwise
1147 test_load_too_high ()
1149 return GNUNET_NO; // FIXME
1153 /* ******************* Pending Request Refresh Task ******************** */
1158 * We use a random delay to make the timing of requests less
1159 * predictable. This function returns such a random delay. We add a base
1160 * delay of MAX_CORK_DELAY (1s).
1162 * FIXME: make schedule dependent on the specifics of the request?
1163 * Or bandwidth and number of connected peers and load?
1165 * @return random delay to use for some request, between 1s and 1000+TTL_DECREMENT ms
1167 static struct GNUNET_TIME_Relative
1168 get_processing_delay ()
1171 GNUNET_TIME_relative_add (GNUNET_CONSTANTS_MAX_CORK_DELAY,
1172 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1173 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1179 * We're processing a GET request from another peer and have decided
1180 * to forward it to other peers. This function is called periodically
1181 * and should forward the request to other peers until we have all
1182 * possible replies. If we have transmitted the *only* reply to
1183 * the initiator we should destroy the pending request. If we have
1184 * many replies in the queue to the initiator, we should delay sending
1185 * out more queries until the reply queue has shrunk some.
1187 * @param cls our "struct ProcessGetContext *"
1191 forward_request_task (void *cls,
1192 const struct GNUNET_SCHEDULER_TaskContext *tc);
1196 * Function called after we either failed or succeeded
1197 * at transmitting a query to a peer.
1199 * @param cls the requests "struct PendingRequest*"
1200 * @param tpid ID of receiving peer, 0 on transmission error
1203 transmit_query_continuation (void *cls,
1204 GNUNET_PEER_Id tpid)
1206 struct PendingRequest *pr = cls;
1208 GNUNET_STATISTICS_update (stats,
1209 gettext_noop ("# queries scheduled for forwarding"),
1215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1216 "Transmission of request failed, will try again later.\n");
1218 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1219 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1220 get_processing_delay (),
1221 &forward_request_task,
1225 GNUNET_STATISTICS_update (stats,
1226 gettext_noop ("# queries forwarded"),
1229 GNUNET_PEER_change_rc (tpid, 1);
1230 if (pr->used_pids_off == pr->used_pids_size)
1231 GNUNET_array_grow (pr->used_pids,
1233 pr->used_pids_size * 2 + 2);
1234 pr->used_pids[pr->used_pids_off++] = tpid;
1235 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1236 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1237 get_processing_delay (),
1238 &forward_request_task,
1244 * How many bytes should a bloomfilter be if we have already seen
1245 * entry_count responses? Note that BLOOMFILTER_K gives us the number
1246 * of bits set per entry. Furthermore, we should not re-size the
1247 * filter too often (to keep it cheap).
1249 * Since other peers will also add entries but not resize the filter,
1250 * we should generally pick a slightly larger size than what the
1251 * strict math would suggest.
1253 * @return must be a power of two and smaller or equal to 2^15.
1256 compute_bloomfilter_size (unsigned int entry_count)
1259 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
1260 uint16_t max = 1 << 15;
1262 if (entry_count > max)
1265 while ((size < max) && (size < ideal))
1274 * Recalculate our bloom filter for filtering replies. This function
1275 * will create a new bloom filter from scratch, so it should only be
1276 * called if we have no bloomfilter at all (and hence can create a
1277 * fresh one of minimal size without problems) OR if our peer is the
1278 * initiator (in which case we may resize to larger than mimimum size).
1280 * @param pr request for which the BF is to be recomputed
1283 refresh_bloomfilter (struct PendingRequest *pr)
1287 GNUNET_HashCode mhash;
1289 nsize = compute_bloomfilter_size (pr->replies_seen_off);
1290 if (nsize == pr->bf_size)
1291 return; /* size not changed */
1293 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
1294 pr->bf_size = nsize;
1295 pr->mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, -1);
1296 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
1299 for (i=0;i<pr->replies_seen_off;i++)
1301 mingle_hash (&pr->replies_seen[i], pr->mingle, &mhash);
1302 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
1308 * Function called after we've tried to reserve a certain amount of
1309 * bandwidth for a reply. Check if we succeeded and if so send our
1312 * @param cls the requests "struct PendingRequest*"
1313 * @param peer identifies the peer
1314 * @param bpm_in set to the current bandwidth limit (receiving) for this peer
1315 * @param bpm_out set to the current bandwidth limit (sending) for this peer
1316 * @param amount set to the amount that was actually reserved or unreserved
1317 * @param preference current traffic preference for the given peer
1320 target_reservation_cb (void *cls,
1322 GNUNET_PeerIdentity * peer,
1323 struct GNUNET_BANDWIDTH_Value32NBO bpm_in,
1324 struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
1326 uint64_t preference)
1328 struct PendingRequest *pr = cls;
1329 struct ConnectedPeer *cp;
1330 struct PendingMessage *pm;
1331 struct GetMessage *gm;
1332 GNUNET_HashCode *ext;
1342 /* error in communication with core, try again later */
1343 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1344 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1345 get_processing_delay (),
1346 &forward_request_task,
1350 // (3) transmit, update ttl/priority
1351 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1355 /* Peer must have just left */
1357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1358 "Selected peer disconnected!\n");
1360 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1361 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1362 get_processing_delay (),
1363 &forward_request_task,
1367 no_route = GNUNET_NO;
1368 /* FIXME: check against DBLOCK_SIZE and possibly return
1369 amount to reserve; however, this also needs to work
1370 with testcases which currently start out with a far
1371 too low per-peer bw limit, so they would never send
1372 anything. Big issue. */
1378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1379 "Failed to reserve bandwidth for reply (got %d/%u bytes only)!\n",
1383 GNUNET_STATISTICS_update (stats,
1384 gettext_noop ("# reply bandwidth reservation requests failed"),
1387 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1388 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1389 get_processing_delay (),
1390 &forward_request_task,
1392 return; /* this target round failed */
1394 /* FIXME: if we are "quite" busy, we may still want to skip
1395 this round; need more load detection code! */
1396 no_route = GNUNET_YES;
1399 GNUNET_STATISTICS_update (stats,
1400 gettext_noop ("# queries scheduled for forwarding"),
1403 /* build message and insert message into priority queue */
1405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1406 "Forwarding request `%s' to `%4s'!\n",
1407 GNUNET_h2s (&pr->query),
1412 if (GNUNET_YES == no_route)
1414 bm |= GET_MESSAGE_BIT_RETURN_TO;
1417 if (pr->namespace != NULL)
1419 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
1422 if (pr->target_pid != 0)
1424 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
1427 msize = sizeof (struct GetMessage) + pr->bf_size + k * sizeof(GNUNET_HashCode);
1428 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1429 pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1431 gm = (struct GetMessage*) &pm[1];
1432 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
1433 gm->header.size = htons (msize);
1434 gm->type = htonl (pr->type);
1435 pr->remaining_priority /= 2;
1436 gm->priority = htonl (pr->remaining_priority);
1437 gm->ttl = htonl (pr->ttl);
1438 gm->filter_mutator = htonl(pr->mingle);
1439 gm->hash_bitmap = htonl (bm);
1440 gm->query = pr->query;
1441 ext = (GNUNET_HashCode*) &gm[1];
1443 if (GNUNET_YES == no_route)
1444 GNUNET_PEER_resolve (pr->cp->pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1445 if (pr->namespace != NULL)
1446 memcpy (&ext[k++], pr->namespace, sizeof (GNUNET_HashCode));
1447 if (pr->target_pid != 0)
1448 GNUNET_PEER_resolve (pr->target_pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1449 bfdata = (char *) &ext[k];
1451 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
1454 pm->cont = &transmit_query_continuation;
1456 add_to_pending_messages_for_peer (cp, pm, pr);
1461 * Closure used for "target_peer_select_cb".
1463 struct PeerSelectionContext
1466 * The request for which we are selecting
1469 struct PendingRequest *pr;
1472 * Current "prime" target.
1474 struct GNUNET_PeerIdentity target;
1477 * How much do we like this target?
1479 double target_score;
1485 * Function called for each connected peer to determine
1486 * which one(s) would make good targets for forwarding.
1488 * @param cls closure (struct PeerSelectionContext)
1489 * @param key current key code (peer identity)
1490 * @param value value in the hash map (struct ConnectedPeer)
1491 * @return GNUNET_YES if we should continue to
1496 target_peer_select_cb (void *cls,
1497 const GNUNET_HashCode * key,
1500 struct PeerSelectionContext *psc = cls;
1501 struct ConnectedPeer *cp = value;
1502 struct PendingRequest *pr = psc->pr;
1507 /* 1) check that this peer is not the initiator */
1509 return GNUNET_YES; /* skip */
1511 /* 2) check if we have already (recently) forwarded to this peer */
1513 for (i=0;i<pr->used_pids_off;i++)
1514 if (pr->used_pids[i] == cp->pid)
1517 if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1518 RETRY_PROBABILITY_INV))
1521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1522 "NOT re-trying query that was previously transmitted %u times\n",
1523 (unsigned int) pr->used_pids_off);
1525 return GNUNET_YES; /* skip */
1530 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1531 "Re-trying query that was previously transmitted %u times to this peer\n",
1534 // 3) calculate how much we'd like to forward to this peer
1535 score = 42; // FIXME!
1536 // FIXME: also need API to gather data on responsiveness
1537 // of this peer (we have fields for that in 'cp', but
1538 // they are never set!)
1540 /* store best-fit in closure */
1541 if (score > psc->target_score)
1543 psc->target_score = score;
1544 psc->target.hashPubKey = *key;
1551 * The priority level imposes a bound on the maximum
1552 * value for the ttl that can be requested.
1554 * @param ttl_in requested ttl
1555 * @param prio given priority
1556 * @return ttl_in if ttl_in is below the limit,
1557 * otherwise the ttl-limit for the given priority
1560 bound_ttl (int32_t ttl_in, uint32_t prio)
1562 unsigned long long allowed;
1566 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
1567 if (ttl_in > allowed)
1569 if (allowed >= (1 << 30))
1578 * We're processing a GET request from another peer and have decided
1579 * to forward it to other peers. This function is called periodically
1580 * and should forward the request to other peers until we have all
1581 * possible replies. If we have transmitted the *only* reply to
1582 * the initiator we should destroy the pending request. If we have
1583 * many replies in the queue to the initiator, we should delay sending
1584 * out more queries until the reply queue has shrunk some.
1586 * @param cls our "struct ProcessGetContext *"
1590 forward_request_task (void *cls,
1591 const struct GNUNET_SCHEDULER_TaskContext *tc)
1593 struct PendingRequest *pr = cls;
1594 struct PeerSelectionContext psc;
1595 struct ConnectedPeer *cp;
1596 struct GNUNET_TIME_Relative delay;
1598 pr->task = GNUNET_SCHEDULER_NO_TASK;
1599 if (pr->irc != NULL)
1602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1603 "Forwarding of query `%s' not attempted due to pending local lookup!\n",
1604 GNUNET_h2s (&pr->query));
1606 return; /* already pending */
1608 if (GNUNET_YES == pr->local_only)
1609 return; /* configured to not do P2P search */
1610 /* (1) select target */
1612 psc.target_score = DBL_MIN;
1613 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1614 &target_peer_select_cb,
1616 if (psc.target_score == DBL_MIN)
1618 delay = get_processing_delay ();
1620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1621 "No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
1622 GNUNET_h2s (&pr->query),
1625 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1627 &forward_request_task,
1629 return; /* nobody selected */
1631 /* (3) update TTL/priority */
1633 if (pr->client_request_list != NULL)
1635 /* FIXME: use better algorithm!? */
1636 if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1639 /* FIXME: bound priority by "customary" priority used by other peers
1641 pr->ttl = bound_ttl (pr->ttl + TTL_DECREMENT * 2,
1644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1645 "Trying query `%s' with priority %u and TTL %d.\n",
1646 GNUNET_h2s (&pr->query),
1653 /* FIXME: should we do something here as well!? */
1656 /* (3) reserve reply bandwidth */
1657 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1658 &psc.target.hashPubKey);
1659 GNUNET_assert (NULL != cp);
1660 pr->irc = GNUNET_CORE_peer_change_preference (sched, cfg,
1662 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1663 GNUNET_BANDWIDTH_value_init ((uint32_t) -1 /* no limit */),
1665 (uint64_t) cp->inc_preference,
1666 &target_reservation_cb,
1668 cp->inc_preference = 0.0;
1672 /* **************************** P2P PUT Handling ************************ */
1676 * Function called after we either failed or succeeded
1677 * at transmitting a reply to a peer.
1679 * @param cls the requests "struct PendingRequest*"
1680 * @param tpid ID of receiving peer, 0 on transmission error
1683 transmit_reply_continuation (void *cls,
1684 GNUNET_PEER_Id tpid)
1686 struct PendingRequest *pr = cls;
1690 case GNUNET_BLOCK_TYPE_DBLOCK:
1691 case GNUNET_BLOCK_TYPE_IBLOCK:
1692 /* only one reply expected, done with the request! */
1693 destroy_pending_request (pr);
1695 case GNUNET_BLOCK_TYPE_ANY:
1696 case GNUNET_BLOCK_TYPE_KBLOCK:
1697 case GNUNET_BLOCK_TYPE_SBLOCK:
1707 * Transmit the given message by copying it to the target buffer
1708 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1709 * for writing in the meantime. In that case, do nothing
1710 * (the disconnect or shutdown handler will take care of the rest).
1711 * If we were able to transmit messages and there are still more
1712 * pending, ask core again for further calls to this function.
1714 * @param cls closure, pointer to the 'struct ClientList*'
1715 * @param size number of bytes available in buf
1716 * @param buf where the callee should write the message
1717 * @return number of bytes written to buf
1720 transmit_to_client (void *cls,
1721 size_t size, void *buf)
1723 struct ClientList *cl = cls;
1725 struct ClientResponseMessage *creply;
1732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1733 "Not sending reply, client communication problem.\n");
1738 while ( (NULL != (creply = cl->res_head) ) &&
1739 (creply->msize <= size) )
1741 memcpy (&cbuf[msize], &creply[1], creply->msize);
1742 msize += creply->msize;
1743 size -= creply->msize;
1744 GNUNET_CONTAINER_DLL_remove (cl->res_head,
1747 GNUNET_free (creply);
1750 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1752 GNUNET_TIME_UNIT_FOREVER_REL,
1753 &transmit_to_client,
1756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1757 "Transmitted %u bytes to client\n",
1758 (unsigned int) msize);
1765 * Closure for "process_reply" function.
1767 struct ProcessReplyClosure
1770 * The data for the reply.
1774 // FIXME: add 'struct ConnectedPeer' to track 'last_xxx_replies' here!
1777 * When the reply expires.
1779 struct GNUNET_TIME_Absolute expiration;
1787 * Namespace that this reply belongs to
1788 * (if it is of type SBLOCK).
1790 GNUNET_HashCode namespace;
1793 * Type of the block.
1795 enum GNUNET_BLOCK_Type type;
1798 * How much was this reply worth to us?
1805 * We have received a reply; handle it!
1807 * @param cls response (struct ProcessReplyClosure)
1808 * @param key our query
1809 * @param value value in the hash map (info about the query)
1810 * @return GNUNET_YES (we should continue to iterate)
1813 process_reply (void *cls,
1814 const GNUNET_HashCode * key,
1817 struct ProcessReplyClosure *prq = cls;
1818 struct PendingRequest *pr = value;
1819 struct PendingMessage *reply;
1820 struct ClientResponseMessage *creply;
1821 struct ClientList *cl;
1822 struct PutMessage *pm;
1823 struct ConnectedPeer *cp;
1824 GNUNET_HashCode chash;
1825 GNUNET_HashCode mhash;
1829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1830 "Matched result (type %u) for query `%s' with pending request\n",
1831 (unsigned int) prq->type,
1834 GNUNET_STATISTICS_update (stats,
1835 gettext_noop ("# replies received and matched"),
1838 GNUNET_CRYPTO_hash (prq->data,
1843 case GNUNET_BLOCK_TYPE_DBLOCK:
1844 case GNUNET_BLOCK_TYPE_IBLOCK:
1845 /* only possible reply, stop requesting! */
1846 while (NULL != pr->pending_head)
1847 destroy_pending_message_list_entry (pr->pending_head);
1848 if (pr->drq != NULL)
1850 if (pr->client_request_list != NULL)
1851 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
1853 GNUNET_FS_drq_get_cancel (pr->drq);
1856 pr->do_remove = GNUNET_YES;
1857 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
1859 GNUNET_SCHEDULER_cancel (sched,
1861 pr->task = GNUNET_SCHEDULER_NO_TASK;
1863 GNUNET_break (GNUNET_YES ==
1864 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
1868 case GNUNET_BLOCK_TYPE_SBLOCK:
1869 if (pr->namespace == NULL)
1874 if (0 != memcmp (pr->namespace,
1876 sizeof (GNUNET_HashCode)))
1878 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1879 _("Reply mismatched in terms of namespace. Discarded.\n"));
1880 return GNUNET_YES; /* wrong namespace */
1882 /* then: fall-through! */
1883 case GNUNET_BLOCK_TYPE_KBLOCK:
1884 case GNUNET_BLOCK_TYPE_NBLOCK:
1887 mingle_hash (&chash, pr->mingle, &mhash);
1888 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (pr->bf,
1891 GNUNET_STATISTICS_update (stats,
1892 gettext_noop ("# duplicate replies discarded (bloomfilter)"),
1896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1897 "Duplicate response `%s', discarding.\n",
1898 GNUNET_h2s (&mhash));
1900 return GNUNET_YES; /* duplicate */
1903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1904 "New response `%s', adding to filter.\n",
1905 GNUNET_h2s (&mhash));
1908 if (pr->client_request_list != NULL)
1910 if (pr->replies_seen_size == pr->replies_seen_off)
1911 GNUNET_array_grow (pr->replies_seen,
1912 pr->replies_seen_size,
1913 pr->replies_seen_size * 2 + 4);
1914 pr->replies_seen[pr->replies_seen_off++] = chash;
1916 if ( (pr->bf == NULL) ||
1917 (pr->client_request_list != NULL) )
1918 refresh_bloomfilter (pr);
1919 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
1926 prq->priority += pr->remaining_priority;
1927 pr->remaining_priority = 0;
1928 if (pr->client_request_list != NULL)
1930 GNUNET_STATISTICS_update (stats,
1931 gettext_noop ("# replies received for local clients"),
1934 cl = pr->client_request_list->client_list;
1935 msize = sizeof (struct PutMessage) + prq->size;
1936 creply = GNUNET_malloc (msize + sizeof (struct ClientResponseMessage));
1937 creply->msize = msize;
1938 creply->client_list = cl;
1939 GNUNET_CONTAINER_DLL_insert_after (cl->res_head,
1943 pm = (struct PutMessage*) &creply[1];
1944 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
1945 pm->header.size = htons (msize);
1946 pm->type = htonl (prq->type);
1947 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
1948 memcpy (&pm[1], prq->data, prq->size);
1952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1953 "Transmitting result for query `%s' to client\n",
1956 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1958 GNUNET_TIME_UNIT_FOREVER_REL,
1959 &transmit_to_client,
1962 GNUNET_break (cl->th != NULL);
1964 destroy_pending_request (pr);
1970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1971 "Transmitting result for query `%s' to other peer (PID=%u)\n",
1973 (unsigned int) cp->pid);
1975 GNUNET_STATISTICS_update (stats,
1976 gettext_noop ("# replies received for other peers"),
1979 msize = sizeof (struct PutMessage) + prq->size;
1980 reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
1981 reply->cont = &transmit_reply_continuation;
1982 reply->cont_cls = pr;
1983 reply->msize = msize;
1984 reply->priority = (uint32_t) -1; /* send replies first! */
1985 pm = (struct PutMessage*) &reply[1];
1986 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
1987 pm->header.size = htons (msize);
1988 pm->type = htonl (prq->type);
1989 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
1990 memcpy (&pm[1], prq->data, prq->size);
1991 add_to_pending_messages_for_peer (cp, reply, pr);
1993 // FIXME: implement hot-path routing statistics keeping!
1999 * Handle P2P "PUT" message.
2001 * @param cls closure, always NULL
2002 * @param other the other peer involved (sender or receiver, NULL
2003 * for loopback messages where we are both sender and receiver)
2004 * @param message the actual message
2005 * @param latency reported latency of the connection with 'other'
2006 * @param distance reported distance (DV) to 'other'
2007 * @return GNUNET_OK to keep the connection open,
2008 * GNUNET_SYSERR to close it (signal serious error)
2011 handle_p2p_put (void *cls,
2012 const struct GNUNET_PeerIdentity *other,
2013 const struct GNUNET_MessageHeader *message,
2014 struct GNUNET_TIME_Relative latency,
2017 const struct PutMessage *put;
2020 enum GNUNET_BLOCK_Type type;
2021 struct GNUNET_TIME_Absolute expiration;
2022 GNUNET_HashCode query;
2023 struct ProcessReplyClosure prq;
2024 const struct SBlock *sb;
2026 msize = ntohs (message->size);
2027 if (msize < sizeof (struct PutMessage))
2030 return GNUNET_SYSERR;
2032 put = (const struct PutMessage*) message;
2033 dsize = msize - sizeof (struct PutMessage);
2034 type = ntohl (put->type);
2035 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
2038 GNUNET_BLOCK_check_block (type,
2043 GNUNET_break_op (0);
2044 return GNUNET_SYSERR;
2046 if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
2047 return GNUNET_SYSERR;
2048 if (GNUNET_BLOCK_TYPE_SBLOCK == type)
2050 sb = (const struct SBlock*) &put[1];
2051 GNUNET_CRYPTO_hash (&sb->subspace,
2052 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2058 "Received result for query `%s' from peer `%4s'\n",
2059 GNUNET_h2s (&query),
2060 GNUNET_i2s (other));
2062 GNUNET_STATISTICS_update (stats,
2063 gettext_noop ("# replies received (overall)"),
2066 /* now, lookup 'query' */
2067 prq.data = (const void*) &put[1];
2070 prq.expiration = expiration;
2072 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2076 // FIXME: if migration is on and load is low,
2077 // queue to store data in datastore;
2078 // use "prq.priority" for that!
2083 /* **************************** P2P GET Handling ************************ */
2087 * Closure for 'check_duplicate_request_{peer,client}'.
2089 struct CheckDuplicateRequestClosure
2092 * The new request we should check if it already exists.
2094 const struct PendingRequest *pr;
2097 * Existing request found by the checker, NULL if none.
2099 struct PendingRequest *have;
2104 * Iterator over entries in the 'query_request_map' that
2105 * tries to see if we have the same request pending from
2106 * the same client already.
2108 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2109 * @param key current key code (query, ignored, must match)
2110 * @param value value in the hash map (a 'struct PendingRequest'
2111 * that already exists)
2112 * @return GNUNET_YES if we should continue to
2113 * iterate (no match yet)
2114 * GNUNET_NO if not (match found).
2117 check_duplicate_request_client (void *cls,
2118 const GNUNET_HashCode * key,
2121 struct CheckDuplicateRequestClosure *cdc = cls;
2122 struct PendingRequest *have = value;
2124 if (have->client_request_list == NULL)
2126 if ( (cdc->pr->client_request_list->client_list->client == have->client_request_list->client_list->client) &&
2137 * We're processing (local) results for a search request
2138 * from another peer. Pass applicable results to the
2139 * peer and if we are done either clean up (operation
2140 * complete) or forward to other peers (more results possible).
2142 * @param cls our closure (struct LocalGetContext)
2143 * @param key key for the content
2144 * @param size number of bytes in data
2145 * @param data content stored
2146 * @param type type of the content
2147 * @param priority priority of the content
2148 * @param anonymity anonymity-level for the content
2149 * @param expiration expiration time for the content
2150 * @param uid unique identifier for the datum;
2151 * maybe 0 if no unique identifier is available
2154 process_local_reply (void *cls,
2155 const GNUNET_HashCode * key,
2158 enum GNUNET_BLOCK_Type type,
2161 struct GNUNET_TIME_Absolute
2165 struct PendingRequest *pr = cls;
2166 struct ProcessReplyClosure prq;
2167 struct CheckDuplicateRequestClosure cdrc;
2168 const struct SBlock *sb;
2169 GNUNET_HashCode dhash;
2170 GNUNET_HashCode mhash;
2171 GNUNET_HashCode query;
2176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2177 "Done processing local replies, forwarding request to other peers.\n");
2180 if (pr->client_request_list != NULL)
2182 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
2184 /* Figure out if this is a duplicate request and possibly
2185 merge 'struct PendingRequest' entries */
2188 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2190 &check_duplicate_request_client,
2192 if (cdrc.have != NULL)
2195 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2196 "Received request for block `%s' twice from client, will only request once.\n",
2197 GNUNET_h2s (&pr->query));
2200 destroy_pending_request (pr);
2205 /* no more results */
2206 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2207 pr->task = GNUNET_SCHEDULER_add_now (sched,
2208 &forward_request_task,
2213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2214 "New local response to `%s' of type %u.\n",
2218 if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
2221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2222 "Found ONDEMAND block, performing on-demand encoding\n");
2224 GNUNET_STATISTICS_update (stats,
2225 gettext_noop ("# on-demand blocks matched requests"),
2229 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
2230 anonymity, expiration, uid,
2231 &process_local_reply,
2233 GNUNET_FS_drq_get_next (GNUNET_YES);
2236 /* check for duplicates */
2237 GNUNET_CRYPTO_hash (data, size, &dhash);
2238 mingle_hash (&dhash,
2241 if ( (pr->bf != NULL) &&
2243 GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2248 "Result from datastore filtered by bloomfilter (duplicate).\n");
2250 GNUNET_STATISTICS_update (stats,
2251 gettext_noop ("# results filtered by query bloomfilter"),
2254 GNUNET_FS_drq_get_next (GNUNET_YES);
2258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2259 "Found result for query `%s' in local datastore\n",
2262 GNUNET_STATISTICS_update (stats,
2263 gettext_noop ("# results found locally"),
2266 pr->results_found++;
2267 memset (&prq, 0, sizeof (prq));
2269 prq.expiration = expiration;
2271 if (GNUNET_BLOCK_TYPE_SBLOCK == type)
2273 sb = (const struct SBlock*) data;
2274 GNUNET_CRYPTO_hash (&sb->subspace,
2275 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2278 if (GNUNET_OK != GNUNET_BLOCK_check_block (type,
2284 /* FIXME: consider removing the block? */
2285 GNUNET_FS_drq_get_next (GNUNET_YES);
2289 prq.priority = priority;
2290 process_reply (&prq, key, pr);
2292 if ( (type == GNUNET_BLOCK_TYPE_DBLOCK) ||
2293 (type == GNUNET_BLOCK_TYPE_IBLOCK) )
2295 GNUNET_FS_drq_get_next (GNUNET_NO);
2298 if ( (pr->client_request_list == NULL) &&
2299 ( (GNUNET_YES == test_load_too_high()) ||
2300 (pr->results_found > 5 + 2 * pr->priority) ) )
2303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2304 "Load too high, done with request\n");
2306 GNUNET_STATISTICS_update (stats,
2307 gettext_noop ("# processing result set cut short due to load"),
2310 GNUNET_FS_drq_get_next (GNUNET_NO);
2313 GNUNET_FS_drq_get_next (GNUNET_YES);
2318 * We've received a request with the specified priority. Bound it
2319 * according to how much we trust the given peer.
2321 * @param prio_in requested priority
2322 * @param cp the peer making the request
2323 * @return effective priority
2326 bound_priority (uint32_t prio_in,
2327 struct ConnectedPeer *cp)
2334 * Iterator over entries in the 'query_request_map' that
2335 * tries to see if we have the same request pending from
2336 * the same peer already.
2338 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2339 * @param key current key code (query, ignored, must match)
2340 * @param value value in the hash map (a 'struct PendingRequest'
2341 * that already exists)
2342 * @return GNUNET_YES if we should continue to
2343 * iterate (no match yet)
2344 * GNUNET_NO if not (match found).
2347 check_duplicate_request_peer (void *cls,
2348 const GNUNET_HashCode * key,
2351 struct CheckDuplicateRequestClosure *cdc = cls;
2352 struct PendingRequest *have = value;
2354 if (cdc->pr->target_pid == have->target_pid)
2364 * Handle P2P "GET" request.
2366 * @param cls closure, always NULL
2367 * @param other the other peer involved (sender or receiver, NULL
2368 * for loopback messages where we are both sender and receiver)
2369 * @param message the actual message
2370 * @param latency reported latency of the connection with 'other'
2371 * @param distance reported distance (DV) to 'other'
2372 * @return GNUNET_OK to keep the connection open,
2373 * GNUNET_SYSERR to close it (signal serious error)
2376 handle_p2p_get (void *cls,
2377 const struct GNUNET_PeerIdentity *other,
2378 const struct GNUNET_MessageHeader *message,
2379 struct GNUNET_TIME_Relative latency,
2382 struct PendingRequest *pr;
2383 struct ConnectedPeer *cp;
2384 struct ConnectedPeer *cps;
2385 struct CheckDuplicateRequestClosure cdc;
2386 struct GNUNET_TIME_Relative timeout;
2388 const struct GetMessage *gm;
2390 const GNUNET_HashCode *opt;
2393 uint32_t ttl_decrement;
2394 enum GNUNET_BLOCK_Type type;
2398 msize = ntohs(message->size);
2399 if (msize < sizeof (struct GetMessage))
2401 GNUNET_break_op (0);
2402 return GNUNET_SYSERR;
2404 gm = (const struct GetMessage*) message;
2405 type = ntohl (gm->type);
2408 case GNUNET_BLOCK_TYPE_ANY:
2409 case GNUNET_BLOCK_TYPE_DBLOCK:
2410 case GNUNET_BLOCK_TYPE_IBLOCK:
2411 case GNUNET_BLOCK_TYPE_KBLOCK:
2412 case GNUNET_BLOCK_TYPE_SBLOCK:
2415 GNUNET_break_op (0);
2416 return GNUNET_SYSERR;
2418 bm = ntohl (gm->hash_bitmap);
2426 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
2428 GNUNET_break_op (0);
2429 return GNUNET_SYSERR;
2431 opt = (const GNUNET_HashCode*) &gm[1];
2432 bfsize = msize - sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode);
2433 bm = ntohl (gm->hash_bitmap);
2434 if ( (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) &&
2435 (type != GNUNET_BLOCK_TYPE_SBLOCK) )
2437 GNUNET_break_op (0);
2438 return GNUNET_SYSERR;
2441 cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2442 &other->hashPubKey);
2445 /* peer must have just disconnected */
2446 GNUNET_STATISTICS_update (stats,
2447 gettext_noop ("# requests dropped due to initiator not being connected"),
2450 return GNUNET_SYSERR;
2452 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2453 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2460 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2462 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
2463 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
2466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2467 "Failed to find peer `%4s' in connection set. Dropping query.\n",
2468 GNUNET_i2s (other));
2470 GNUNET_STATISTICS_update (stats,
2471 gettext_noop ("# requests dropped due to missing reverse route"),
2474 /* FIXME: try connect? */
2477 /* note that we can really only check load here since otherwise
2478 peers could find out that we are overloaded by not being
2479 disconnected after sending us a malformed query... */
2480 if (GNUNET_YES == test_load_too_high ())
2483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2484 "Dropping query from `%s', this peer is too busy.\n",
2485 GNUNET_i2s (other));
2487 GNUNET_STATISTICS_update (stats,
2488 gettext_noop ("# requests dropped due to high load"),
2495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2496 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
2497 GNUNET_h2s (&gm->query),
2498 (unsigned int) type,
2502 have_ns = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE));
2503 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2504 (have_ns ? sizeof(GNUNET_HashCode) : 0));
2506 pr->namespace = (GNUNET_HashCode*) &pr[1];
2508 pr->mingle = ntohl (gm->filter_mutator);
2509 if (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE))
2510 memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
2511 if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
2512 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
2514 pr->anonymity_level = 1;
2515 pr->priority = bound_priority (ntohl (gm->priority), cps);
2516 pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
2517 pr->query = gm->query;
2518 /* decrement ttl (always) */
2519 ttl_decrement = 2 * TTL_DECREMENT +
2520 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2522 if ( (pr->ttl < 0) &&
2523 (((int32_t)(pr->ttl - ttl_decrement)) > 0) )
2526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2527 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
2532 GNUNET_STATISTICS_update (stats,
2533 gettext_noop ("# requests dropped due TTL underflow"),
2536 /* integer underflow => drop (should be very rare)! */
2540 pr->ttl -= ttl_decrement;
2541 pr->start_time = GNUNET_TIME_absolute_get ();
2543 /* get bloom filter */
2546 pr->bf = GNUNET_CONTAINER_bloomfilter_init ((const char*) &opt[bits],
2549 pr->bf_size = bfsize;
2554 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2556 &check_duplicate_request_peer,
2558 if (cdc.have != NULL)
2560 if (cdc.have->start_time.value + cdc.have->ttl >=
2561 pr->start_time.value + pr->ttl)
2563 /* existing request has higher TTL, drop new one! */
2564 cdc.have->priority += pr->priority;
2565 destroy_pending_request (pr);
2567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2568 "Have existing request with higher TTL, dropping new request.\n",
2569 GNUNET_i2s (other));
2571 GNUNET_STATISTICS_update (stats,
2572 gettext_noop ("# requests dropped due to higher-TTL request"),
2579 /* existing request has lower TTL, drop old one! */
2580 pr->priority += cdc.have->priority;
2581 /* Possible optimization: if we have applicable pending
2582 replies in 'cdc.have', we might want to move those over
2583 (this is a really rare special-case, so it is not clear
2584 that this would be worth it) */
2585 destroy_pending_request (cdc.have);
2586 /* keep processing 'pr'! */
2591 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2594 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2595 GNUNET_CONTAINER_multihashmap_put (peer_request_map,
2598 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2600 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
2602 pr->start_time.value + pr->ttl);
2604 GNUNET_STATISTICS_update (stats,
2605 gettext_noop ("# P2P searches received"),
2608 GNUNET_STATISTICS_update (stats,
2609 gettext_noop ("# P2P searches active"),
2613 /* calculate change in traffic preference */
2614 preference = (double) pr->priority;
2615 if (preference < QUERY_BANDWIDTH_VALUE)
2616 preference = QUERY_BANDWIDTH_VALUE;
2617 cps->inc_preference += preference;
2619 /* process locally */
2620 if (type == GNUNET_BLOCK_TYPE_DBLOCK)
2621 type = GNUNET_BLOCK_TYPE_ANY; /* to get on-demand as well */
2622 timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
2623 (pr->priority + 1));
2624 pr->drq = GNUNET_FS_drq_get (&gm->query,
2626 &process_local_reply,
2631 /* Are multiple results possible? If so, start processing remotely now! */
2634 case GNUNET_BLOCK_TYPE_DBLOCK:
2635 case GNUNET_BLOCK_TYPE_IBLOCK:
2636 /* only one result, wait for datastore */
2639 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2640 pr->task = GNUNET_SCHEDULER_add_now (sched,
2641 &forward_request_task,
2645 /* make sure we don't track too many requests */
2646 if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
2648 pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
2649 destroy_pending_request (pr);
2655 /* **************************** CS GET Handling ************************ */
2659 * Handle START_SEARCH-message (search request from client).
2661 * @param cls closure
2662 * @param client identification of the client
2663 * @param message the actual message
2666 handle_start_search (void *cls,
2667 struct GNUNET_SERVER_Client *client,
2668 const struct GNUNET_MessageHeader *message)
2670 static GNUNET_HashCode all_zeros;
2671 const struct SearchMessage *sm;
2672 struct ClientList *cl;
2673 struct ClientRequestList *crl;
2674 struct PendingRequest *pr;
2677 enum GNUNET_BLOCK_Type type;
2679 msize = ntohs (message->size);
2680 if ( (msize < sizeof (struct SearchMessage)) ||
2681 (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
2684 GNUNET_SERVER_receive_done (client,
2688 GNUNET_STATISTICS_update (stats,
2689 gettext_noop ("# client searches received"),
2692 sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
2693 sm = (const struct SearchMessage*) message;
2694 type = ntohl (sm->type);
2696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2697 "Received request for `%s' of type %u from local client\n",
2698 GNUNET_h2s (&sm->query),
2699 (unsigned int) type);
2703 case GNUNET_BLOCK_TYPE_ANY:
2704 case GNUNET_BLOCK_TYPE_DBLOCK:
2705 case GNUNET_BLOCK_TYPE_IBLOCK:
2706 case GNUNET_BLOCK_TYPE_KBLOCK:
2707 case GNUNET_BLOCK_TYPE_SBLOCK:
2708 case GNUNET_BLOCK_TYPE_NBLOCK:
2712 GNUNET_SERVER_receive_done (client,
2718 while ( (cl != NULL) &&
2719 (cl->client != client) )
2723 cl = GNUNET_malloc (sizeof (struct ClientList));
2724 cl->client = client;
2725 GNUNET_SERVER_client_keep (client);
2726 cl->next = client_list;
2729 /* detect duplicate KBLOCK requests */
2730 if ( (type == GNUNET_BLOCK_TYPE_KBLOCK) ||
2731 (type == GNUNET_BLOCK_TYPE_NBLOCK) ||
2732 (type == GNUNET_BLOCK_TYPE_ANY) )
2735 while ( (crl != NULL) &&
2736 ( (0 != memcmp (&crl->req->query,
2738 sizeof (GNUNET_HashCode))) ||
2739 (crl->req->type != type) ) )
2744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2745 "Have existing request, merging content-seen lists.\n");
2748 /* Duplicate request (used to send long list of
2749 known/blocked results); merge 'pr->replies_seen'
2750 and update bloom filter */
2751 GNUNET_array_grow (pr->replies_seen,
2752 pr->replies_seen_size,
2753 pr->replies_seen_off + sc);
2754 memcpy (&pr->replies_seen[pr->replies_seen_off],
2756 sc * sizeof (GNUNET_HashCode));
2757 pr->replies_seen_off += sc;
2758 refresh_bloomfilter (pr);
2759 GNUNET_STATISTICS_update (stats,
2760 gettext_noop ("# client searches updated (merged content seen list)"),
2763 GNUNET_SERVER_receive_done (client,
2768 GNUNET_STATISTICS_update (stats,
2769 gettext_noop ("# client searches active"),
2772 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2773 ((type == GNUNET_BLOCK_TYPE_SBLOCK) ? sizeof(GNUNET_HashCode) : 0));
2774 crl = GNUNET_malloc (sizeof (struct ClientRequestList));
2775 memset (crl, 0, sizeof (struct ClientRequestList));
2776 crl->client_list = cl;
2777 GNUNET_CONTAINER_DLL_insert (cl->rl_head,
2782 pr->client_request_list = crl;
2783 GNUNET_array_grow (pr->replies_seen,
2784 pr->replies_seen_size,
2786 memcpy (pr->replies_seen,
2788 sc * sizeof (GNUNET_HashCode));
2789 pr->replies_seen_off = sc;
2790 pr->anonymity_level = ntohl (sm->anonymity_level);
2791 refresh_bloomfilter (pr);
2792 pr->query = sm->query;
2793 if (0 == (1 & ntohl (sm->options)))
2794 pr->local_only = GNUNET_NO;
2796 pr->local_only = GNUNET_YES;
2799 case GNUNET_BLOCK_TYPE_DBLOCK:
2800 case GNUNET_BLOCK_TYPE_IBLOCK:
2801 if (0 != memcmp (&sm->target,
2803 sizeof (GNUNET_HashCode)))
2804 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
2806 case GNUNET_BLOCK_TYPE_SBLOCK:
2807 pr->namespace = (GNUNET_HashCode*) &pr[1];
2808 memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
2813 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2816 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2817 if (type == GNUNET_BLOCK_TYPE_DBLOCK)
2818 type = GNUNET_BLOCK_TYPE_ANY; /* get on-demand blocks too! */
2819 pr->drq = GNUNET_FS_drq_get (&sm->query,
2821 &process_local_reply,
2823 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
2828 /* **************************** Startup ************************ */
2832 * List of handlers for P2P messages
2833 * that we care about.
2835 static struct GNUNET_CORE_MessageHandler p2p_handlers[] =
2838 GNUNET_MESSAGE_TYPE_FS_GET, 0 },
2840 GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
2846 * List of handlers for the messages understood by this
2849 static struct GNUNET_SERVER_MessageHandler handlers[] = {
2850 {&GNUNET_FS_handle_index_start, NULL,
2851 GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
2852 {&GNUNET_FS_handle_index_list_get, NULL,
2853 GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
2854 {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
2855 sizeof (struct UnindexMessage) },
2856 {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
2863 * Process fs requests.
2865 * @param s scheduler to use
2866 * @param server the initialized server
2867 * @param c configuration to use
2870 main_init (struct GNUNET_SCHEDULER_Handle *s,
2871 struct GNUNET_SERVER_Handle *server,
2872 const struct GNUNET_CONFIGURATION_Handle *c)
2876 stats = GNUNET_STATISTICS_create (sched, "fs", cfg);
2877 connected_peers = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
2878 query_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
2879 peer_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
2880 requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
2881 core = GNUNET_CORE_connect (sched,
2883 GNUNET_TIME_UNIT_FOREVER_REL,
2886 &peer_connect_handler,
2887 &peer_disconnect_handler,
2893 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2894 _("Failed to connect to `%s' service.\n"),
2896 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
2897 connected_peers = NULL;
2898 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
2899 query_request_map = NULL;
2900 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
2901 requests_by_expiration_heap = NULL;
2902 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
2903 peer_request_map = NULL;
2905 return GNUNET_SYSERR;
2907 GNUNET_SERVER_disconnect_notify (server,
2908 &handle_client_disconnect,
2910 GNUNET_SERVER_add_handlers (server, handlers);
2911 GNUNET_SCHEDULER_add_delayed (sched,
2912 GNUNET_TIME_UNIT_FOREVER_REL,
2920 * Process fs requests.
2922 * @param cls closure
2923 * @param sched scheduler to use
2924 * @param server the initialized server
2925 * @param cfg configuration to use
2929 struct GNUNET_SCHEDULER_Handle *sched,
2930 struct GNUNET_SERVER_Handle *server,
2931 const struct GNUNET_CONFIGURATION_Handle *cfg)
2933 if ( (GNUNET_OK != GNUNET_FS_drq_init (sched, cfg)) ||
2934 (GNUNET_OK != GNUNET_FS_indexing_init (sched, cfg)) ||
2935 (GNUNET_OK != main_init (sched, server, cfg)) )
2937 GNUNET_SCHEDULER_shutdown (sched);
2944 * The main function for the fs service.
2946 * @param argc number of arguments from the command line
2947 * @param argv command line arguments
2948 * @return 0 ok, 1 on error
2951 main (int argc, char *const *argv)
2953 return (GNUNET_OK ==
2954 GNUNET_SERVICE_run (argc,
2957 GNUNET_SERVICE_OPTION_NONE,
2958 &run, NULL)) ? 0 : 1;
2961 /* end of gnunet-service-fs.c */