2 This file is part of GNUnet.
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_break (GNUNET_OK ==
773 GNUNET_CONTAINER_multihashmap_put (connected_peers,
776 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
781 * Free (each) request made by the peer.
783 * @param cls closure, points to peer that the request belongs to
784 * @param key current key code
785 * @param value value in the hash map
786 * @return GNUNET_YES (we should continue to iterate)
789 destroy_request (void *cls,
790 const GNUNET_HashCode * key,
793 const struct GNUNET_PeerIdentity * peer = cls;
794 struct PendingRequest *pr = value;
796 GNUNET_break (GNUNET_YES ==
797 GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
800 destroy_pending_request (pr);
806 * Method called whenever a peer disconnects.
808 * @param cls closure, not used
809 * @param peer peer identity this notification is about
812 peer_disconnect_handler (void *cls,
814 GNUNET_PeerIdentity * peer)
816 struct ConnectedPeer *cp;
817 struct PendingMessage *pm;
820 GNUNET_CONTAINER_multihashmap_get_multiple (peer_request_map,
824 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
828 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
830 if (NULL != cp->last_client_replies[i])
832 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
833 cp->last_client_replies[i] = NULL;
836 GNUNET_break (GNUNET_YES ==
837 GNUNET_CONTAINER_multihashmap_remove (connected_peers,
840 GNUNET_PEER_change_rc (cp->pid, -1);
841 GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
843 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
844 while (NULL != (pm = cp->pending_messages_head))
845 destroy_pending_message (pm, 0 /* delivery failed */);
846 GNUNET_break (0 == cp->pending_requests);
852 * Iterator over hash map entries that removes all occurences
853 * of the given 'client' from the 'last_client_replies' of the
854 * given connected peer.
856 * @param cls closure, the 'struct GNUNET_SERVER_Client*' to remove
857 * @param key current key code (unused)
858 * @param value value in the hash map (the 'struct ConnectedPeer*' to change)
859 * @return GNUNET_YES (we should continue to iterate)
862 remove_client_from_last_client_replies (void *cls,
863 const GNUNET_HashCode * key,
866 struct GNUNET_SERVER_Client *client = cls;
867 struct ConnectedPeer *cp = value;
870 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
872 if (cp->last_client_replies[i] == client)
874 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
875 cp->last_client_replies[i] = NULL;
883 * A client disconnected. Remove all of its pending queries.
885 * @param cls closure, NULL
886 * @param client identification of the client
889 handle_client_disconnect (void *cls,
890 struct GNUNET_SERVER_Client
893 struct ClientList *pos;
894 struct ClientList *prev;
895 struct ClientRequestList *rcl;
896 struct ClientResponseMessage *creply;
902 while ( (NULL != pos) &&
903 (pos->client != client) )
909 return; /* no requests pending for this client */
910 while (NULL != (rcl = pos->rl_head))
912 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
913 "Destroying pending request `%s' on disconnect\n",
914 GNUNET_h2s (&rcl->req->query));
915 destroy_pending_request (rcl->req);
918 client_list = pos->next;
920 prev->next = pos->next;
923 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
926 while (NULL != (creply = pos->res_head))
928 GNUNET_CONTAINER_DLL_remove (pos->res_head,
931 GNUNET_free (creply);
933 GNUNET_SERVER_client_drop (pos->client);
935 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
936 &remove_client_from_last_client_replies,
942 * Iterator to free peer entries.
944 * @param cls closure, unused
945 * @param key current key code
946 * @param value value in the hash map (peer entry)
947 * @return GNUNET_YES (we should continue to iterate)
950 clean_peer (void *cls,
951 const GNUNET_HashCode * key,
954 peer_disconnect_handler (NULL, (const struct GNUNET_PeerIdentity*) key);
960 * Task run during shutdown.
966 shutdown_task (void *cls,
967 const struct GNUNET_SCHEDULER_TaskContext *tc)
969 while (client_list != NULL)
970 handle_client_disconnect (NULL,
971 client_list->client);
972 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
975 GNUNET_break (0 == GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap));
976 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
977 requests_by_expiration_heap = 0;
978 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
979 connected_peers = NULL;
980 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
981 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
982 query_request_map = NULL;
983 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
984 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
985 peer_request_map = NULL;
986 GNUNET_assert (NULL != core);
987 GNUNET_CORE_disconnect (core);
991 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
999 /* ******************* Utility functions ******************** */
1003 * Transmit the given message by copying it to the target buffer
1004 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1005 * for writing in the meantime. In that case, do nothing
1006 * (the disconnect or shutdown handler will take care of the rest).
1007 * If we were able to transmit messages and there are still more
1008 * pending, ask core again for further calls to this function.
1010 * @param cls closure, pointer to the 'struct ConnectedPeer*'
1011 * @param size number of bytes available in buf
1012 * @param buf where the callee should write the message
1013 * @return number of bytes written to buf
1016 transmit_to_peer (void *cls,
1017 size_t size, void *buf)
1019 struct ConnectedPeer *cp = cls;
1021 struct GNUNET_PeerIdentity pid;
1022 struct PendingMessage *pm;
1029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1030 "Dropping message, core too busy.\n");
1035 while ( (NULL != (pm = cp->pending_messages_head) ) &&
1036 (pm->msize <= size) )
1038 memcpy (&cbuf[msize], &pm[1], pm->msize);
1041 destroy_pending_message (pm, cp->pid);
1045 GNUNET_PEER_resolve (cp->pid,
1047 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1049 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1057 "Transmitting %u bytes to peer %u.\n",
1066 * Add a message to the set of pending messages for the given peer.
1068 * @param cp peer to send message to
1069 * @param pm message to queue
1070 * @param pr request on which behalf this message is being queued
1073 add_to_pending_messages_for_peer (struct ConnectedPeer *cp,
1074 struct PendingMessage *pm,
1075 struct PendingRequest *pr)
1077 struct PendingMessage *pos;
1078 struct PendingMessageList *pml;
1079 struct GNUNET_PeerIdentity pid;
1081 GNUNET_assert (pm->next == NULL);
1082 GNUNET_assert (pm->pml == NULL);
1083 pml = GNUNET_malloc (sizeof (struct PendingMessageList));
1088 GNUNET_CONTAINER_DLL_insert (pr->pending_head,
1091 pos = cp->pending_messages_head;
1092 while ( (pos != NULL) &&
1093 (pm->priority < pos->priority) )
1095 GNUNET_CONTAINER_DLL_insert_after (cp->pending_messages_head,
1096 cp->pending_messages_tail,
1099 cp->pending_requests++;
1100 if (cp->pending_requests > MAX_QUEUE_PER_PEER)
1101 destroy_pending_message (cp->pending_messages_tail, 0);
1102 if (cp->cth == NULL)
1104 /* need to schedule transmission */
1105 GNUNET_PEER_resolve (cp->pid, &pid);
1106 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1107 cp->pending_messages_head->priority,
1110 cp->pending_messages_head->msize,
1114 if (cp->cth == NULL)
1117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1118 "Failed to schedule transmission with core!\n");
1120 /* FIXME: call stats (rare, bad case) */
1126 * Mingle hash with the mingle_number to produce different bits.
1129 mingle_hash (const GNUNET_HashCode * in,
1130 int32_t mingle_number,
1131 GNUNET_HashCode * hc)
1135 GNUNET_CRYPTO_hash (&mingle_number,
1138 GNUNET_CRYPTO_hash_xor (&m, in, hc);
1143 * Test if the load on this peer is too high
1144 * to even consider processing the query at
1147 * @return GNUNET_YES if the load is too high, GNUNET_NO otherwise
1150 test_load_too_high ()
1152 return GNUNET_NO; // FIXME
1156 /* ******************* Pending Request Refresh Task ******************** */
1161 * We use a random delay to make the timing of requests less
1162 * predictable. This function returns such a random delay. We add a base
1163 * delay of MAX_CORK_DELAY (1s).
1165 * FIXME: make schedule dependent on the specifics of the request?
1166 * Or bandwidth and number of connected peers and load?
1168 * @return random delay to use for some request, between 1s and 1000+TTL_DECREMENT ms
1170 static struct GNUNET_TIME_Relative
1171 get_processing_delay ()
1174 GNUNET_TIME_relative_add (GNUNET_CONSTANTS_MAX_CORK_DELAY,
1175 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1176 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1182 * We're processing a GET request from another peer and have decided
1183 * to forward it to other peers. This function is called periodically
1184 * and should forward the request to other peers until we have all
1185 * possible replies. If we have transmitted the *only* reply to
1186 * the initiator we should destroy the pending request. If we have
1187 * many replies in the queue to the initiator, we should delay sending
1188 * out more queries until the reply queue has shrunk some.
1190 * @param cls our "struct ProcessGetContext *"
1194 forward_request_task (void *cls,
1195 const struct GNUNET_SCHEDULER_TaskContext *tc);
1199 * Function called after we either failed or succeeded
1200 * at transmitting a query to a peer.
1202 * @param cls the requests "struct PendingRequest*"
1203 * @param tpid ID of receiving peer, 0 on transmission error
1206 transmit_query_continuation (void *cls,
1207 GNUNET_PEER_Id tpid)
1209 struct PendingRequest *pr = cls;
1211 GNUNET_STATISTICS_update (stats,
1212 gettext_noop ("# queries scheduled for forwarding"),
1218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1219 "Transmission of request failed, will try again later.\n");
1221 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1222 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1223 get_processing_delay (),
1224 &forward_request_task,
1228 GNUNET_STATISTICS_update (stats,
1229 gettext_noop ("# queries forwarded"),
1232 GNUNET_PEER_change_rc (tpid, 1);
1233 if (pr->used_pids_off == pr->used_pids_size)
1234 GNUNET_array_grow (pr->used_pids,
1236 pr->used_pids_size * 2 + 2);
1237 pr->used_pids[pr->used_pids_off++] = tpid;
1238 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1239 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1240 get_processing_delay (),
1241 &forward_request_task,
1247 * How many bytes should a bloomfilter be if we have already seen
1248 * entry_count responses? Note that BLOOMFILTER_K gives us the number
1249 * of bits set per entry. Furthermore, we should not re-size the
1250 * filter too often (to keep it cheap).
1252 * Since other peers will also add entries but not resize the filter,
1253 * we should generally pick a slightly larger size than what the
1254 * strict math would suggest.
1256 * @return must be a power of two and smaller or equal to 2^15.
1259 compute_bloomfilter_size (unsigned int entry_count)
1262 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
1263 uint16_t max = 1 << 15;
1265 if (entry_count > max)
1268 while ((size < max) && (size < ideal))
1277 * Recalculate our bloom filter for filtering replies. This function
1278 * will create a new bloom filter from scratch, so it should only be
1279 * called if we have no bloomfilter at all (and hence can create a
1280 * fresh one of minimal size without problems) OR if our peer is the
1281 * initiator (in which case we may resize to larger than mimimum size).
1283 * @param pr request for which the BF is to be recomputed
1286 refresh_bloomfilter (struct PendingRequest *pr)
1290 GNUNET_HashCode mhash;
1292 nsize = compute_bloomfilter_size (pr->replies_seen_off);
1293 if (nsize == pr->bf_size)
1294 return; /* size not changed */
1296 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
1297 pr->bf_size = nsize;
1298 pr->mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, -1);
1299 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
1302 for (i=0;i<pr->replies_seen_off;i++)
1304 mingle_hash (&pr->replies_seen[i], pr->mingle, &mhash);
1305 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
1311 * Function called after we've tried to reserve a certain amount of
1312 * bandwidth for a reply. Check if we succeeded and if so send our
1315 * @param cls the requests "struct PendingRequest*"
1316 * @param peer identifies the peer
1317 * @param bpm_in set to the current bandwidth limit (receiving) for this peer
1318 * @param bpm_out set to the current bandwidth limit (sending) for this peer
1319 * @param amount set to the amount that was actually reserved or unreserved
1320 * @param preference current traffic preference for the given peer
1323 target_reservation_cb (void *cls,
1325 GNUNET_PeerIdentity * peer,
1326 struct GNUNET_BANDWIDTH_Value32NBO bpm_in,
1327 struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
1329 uint64_t preference)
1331 struct PendingRequest *pr = cls;
1332 struct ConnectedPeer *cp;
1333 struct PendingMessage *pm;
1334 struct GetMessage *gm;
1335 GNUNET_HashCode *ext;
1345 /* error in communication with core, try again later */
1346 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1347 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1348 get_processing_delay (),
1349 &forward_request_task,
1353 // (3) transmit, update ttl/priority
1354 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1358 /* Peer must have just left */
1360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1361 "Selected peer disconnected!\n");
1363 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1364 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1365 get_processing_delay (),
1366 &forward_request_task,
1370 no_route = GNUNET_NO;
1371 /* FIXME: check against DBLOCK_SIZE and possibly return
1372 amount to reserve; however, this also needs to work
1373 with testcases which currently start out with a far
1374 too low per-peer bw limit, so they would never send
1375 anything. Big issue. */
1381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1382 "Failed to reserve bandwidth for reply (got %d/%u bytes only)!\n",
1386 GNUNET_STATISTICS_update (stats,
1387 gettext_noop ("# reply bandwidth reservation requests failed"),
1390 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1391 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1392 get_processing_delay (),
1393 &forward_request_task,
1395 return; /* this target round failed */
1397 /* FIXME: if we are "quite" busy, we may still want to skip
1398 this round; need more load detection code! */
1399 no_route = GNUNET_YES;
1402 GNUNET_STATISTICS_update (stats,
1403 gettext_noop ("# queries scheduled for forwarding"),
1406 /* build message and insert message into priority queue */
1408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1409 "Forwarding request `%s' to `%4s'!\n",
1410 GNUNET_h2s (&pr->query),
1415 if (GNUNET_YES == no_route)
1417 bm |= GET_MESSAGE_BIT_RETURN_TO;
1420 if (pr->namespace != NULL)
1422 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
1425 if (pr->target_pid != 0)
1427 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
1430 msize = sizeof (struct GetMessage) + pr->bf_size + k * sizeof(GNUNET_HashCode);
1431 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1432 pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1434 gm = (struct GetMessage*) &pm[1];
1435 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
1436 gm->header.size = htons (msize);
1437 gm->type = htonl (pr->type);
1438 pr->remaining_priority /= 2;
1439 gm->priority = htonl (pr->remaining_priority);
1440 gm->ttl = htonl (pr->ttl);
1441 gm->filter_mutator = htonl(pr->mingle);
1442 gm->hash_bitmap = htonl (bm);
1443 gm->query = pr->query;
1444 ext = (GNUNET_HashCode*) &gm[1];
1446 if (GNUNET_YES == no_route)
1447 GNUNET_PEER_resolve (pr->cp->pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1448 if (pr->namespace != NULL)
1449 memcpy (&ext[k++], pr->namespace, sizeof (GNUNET_HashCode));
1450 if (pr->target_pid != 0)
1451 GNUNET_PEER_resolve (pr->target_pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1452 bfdata = (char *) &ext[k];
1454 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
1457 pm->cont = &transmit_query_continuation;
1459 add_to_pending_messages_for_peer (cp, pm, pr);
1464 * Closure used for "target_peer_select_cb".
1466 struct PeerSelectionContext
1469 * The request for which we are selecting
1472 struct PendingRequest *pr;
1475 * Current "prime" target.
1477 struct GNUNET_PeerIdentity target;
1480 * How much do we like this target?
1482 double target_score;
1488 * Function called for each connected peer to determine
1489 * which one(s) would make good targets for forwarding.
1491 * @param cls closure (struct PeerSelectionContext)
1492 * @param key current key code (peer identity)
1493 * @param value value in the hash map (struct ConnectedPeer)
1494 * @return GNUNET_YES if we should continue to
1499 target_peer_select_cb (void *cls,
1500 const GNUNET_HashCode * key,
1503 struct PeerSelectionContext *psc = cls;
1504 struct ConnectedPeer *cp = value;
1505 struct PendingRequest *pr = psc->pr;
1510 /* 1) check that this peer is not the initiator */
1512 return GNUNET_YES; /* skip */
1514 /* 2) check if we have already (recently) forwarded to this peer */
1516 for (i=0;i<pr->used_pids_off;i++)
1517 if (pr->used_pids[i] == cp->pid)
1520 if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1521 RETRY_PROBABILITY_INV))
1524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1525 "NOT re-trying query that was previously transmitted %u times\n",
1526 (unsigned int) pr->used_pids_off);
1528 return GNUNET_YES; /* skip */
1533 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1534 "Re-trying query that was previously transmitted %u times to this peer\n",
1537 // 3) calculate how much we'd like to forward to this peer
1538 score = 42; // FIXME!
1539 // FIXME: also need API to gather data on responsiveness
1540 // of this peer (we have fields for that in 'cp', but
1541 // they are never set!)
1543 /* store best-fit in closure */
1544 if (score > psc->target_score)
1546 psc->target_score = score;
1547 psc->target.hashPubKey = *key;
1554 * The priority level imposes a bound on the maximum
1555 * value for the ttl that can be requested.
1557 * @param ttl_in requested ttl
1558 * @param prio given priority
1559 * @return ttl_in if ttl_in is below the limit,
1560 * otherwise the ttl-limit for the given priority
1563 bound_ttl (int32_t ttl_in, uint32_t prio)
1565 unsigned long long allowed;
1569 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
1570 if (ttl_in > allowed)
1572 if (allowed >= (1 << 30))
1581 * We're processing a GET request from another peer and have decided
1582 * to forward it to other peers. This function is called periodically
1583 * and should forward the request to other peers until we have all
1584 * possible replies. If we have transmitted the *only* reply to
1585 * the initiator we should destroy the pending request. If we have
1586 * many replies in the queue to the initiator, we should delay sending
1587 * out more queries until the reply queue has shrunk some.
1589 * @param cls our "struct ProcessGetContext *"
1593 forward_request_task (void *cls,
1594 const struct GNUNET_SCHEDULER_TaskContext *tc)
1596 struct PendingRequest *pr = cls;
1597 struct PeerSelectionContext psc;
1598 struct ConnectedPeer *cp;
1599 struct GNUNET_TIME_Relative delay;
1601 pr->task = GNUNET_SCHEDULER_NO_TASK;
1602 if (pr->irc != NULL)
1605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1606 "Forwarding of query `%s' not attempted due to pending local lookup!\n",
1607 GNUNET_h2s (&pr->query));
1609 return; /* already pending */
1611 if (GNUNET_YES == pr->local_only)
1612 return; /* configured to not do P2P search */
1613 /* (1) select target */
1615 psc.target_score = DBL_MIN;
1616 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1617 &target_peer_select_cb,
1619 if (psc.target_score == DBL_MIN)
1621 delay = get_processing_delay ();
1623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1624 "No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
1625 GNUNET_h2s (&pr->query),
1628 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1630 &forward_request_task,
1632 return; /* nobody selected */
1634 /* (3) update TTL/priority */
1636 if (pr->client_request_list != NULL)
1638 /* FIXME: use better algorithm!? */
1639 if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1642 /* FIXME: bound priority by "customary" priority used by other peers
1644 pr->ttl = bound_ttl (pr->ttl + TTL_DECREMENT * 2,
1647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1648 "Trying query `%s' with priority %u and TTL %d.\n",
1649 GNUNET_h2s (&pr->query),
1656 /* FIXME: should we do something here as well!? */
1659 /* (3) reserve reply bandwidth */
1660 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1661 &psc.target.hashPubKey);
1662 GNUNET_assert (NULL != cp);
1663 pr->irc = GNUNET_CORE_peer_change_preference (sched, cfg,
1665 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1666 GNUNET_BANDWIDTH_value_init ((uint32_t) -1 /* no limit */),
1668 (uint64_t) cp->inc_preference,
1669 &target_reservation_cb,
1671 cp->inc_preference = 0.0;
1675 /* **************************** P2P PUT Handling ************************ */
1679 * Function called after we either failed or succeeded
1680 * at transmitting a reply to a peer.
1682 * @param cls the requests "struct PendingRequest*"
1683 * @param tpid ID of receiving peer, 0 on transmission error
1686 transmit_reply_continuation (void *cls,
1687 GNUNET_PEER_Id tpid)
1689 struct PendingRequest *pr = cls;
1693 case GNUNET_BLOCK_TYPE_DBLOCK:
1694 case GNUNET_BLOCK_TYPE_IBLOCK:
1695 /* only one reply expected, done with the request! */
1696 destroy_pending_request (pr);
1698 case GNUNET_BLOCK_TYPE_ANY:
1699 case GNUNET_BLOCK_TYPE_KBLOCK:
1700 case GNUNET_BLOCK_TYPE_SBLOCK:
1710 * Transmit the given message by copying it to the target buffer
1711 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1712 * for writing in the meantime. In that case, do nothing
1713 * (the disconnect or shutdown handler will take care of the rest).
1714 * If we were able to transmit messages and there are still more
1715 * pending, ask core again for further calls to this function.
1717 * @param cls closure, pointer to the 'struct ClientList*'
1718 * @param size number of bytes available in buf
1719 * @param buf where the callee should write the message
1720 * @return number of bytes written to buf
1723 transmit_to_client (void *cls,
1724 size_t size, void *buf)
1726 struct ClientList *cl = cls;
1728 struct ClientResponseMessage *creply;
1735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1736 "Not sending reply, client communication problem.\n");
1741 while ( (NULL != (creply = cl->res_head) ) &&
1742 (creply->msize <= size) )
1744 memcpy (&cbuf[msize], &creply[1], creply->msize);
1745 msize += creply->msize;
1746 size -= creply->msize;
1747 GNUNET_CONTAINER_DLL_remove (cl->res_head,
1750 GNUNET_free (creply);
1753 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1755 GNUNET_TIME_UNIT_FOREVER_REL,
1756 &transmit_to_client,
1759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1760 "Transmitted %u bytes to client\n",
1761 (unsigned int) msize);
1768 * Closure for "process_reply" function.
1770 struct ProcessReplyClosure
1773 * The data for the reply.
1777 // FIXME: add 'struct ConnectedPeer' to track 'last_xxx_replies' here!
1780 * When the reply expires.
1782 struct GNUNET_TIME_Absolute expiration;
1790 * Namespace that this reply belongs to
1791 * (if it is of type SBLOCK).
1793 GNUNET_HashCode namespace;
1796 * Type of the block.
1798 enum GNUNET_BLOCK_Type type;
1801 * How much was this reply worth to us?
1808 * We have received a reply; handle it!
1810 * @param cls response (struct ProcessReplyClosure)
1811 * @param key our query
1812 * @param value value in the hash map (info about the query)
1813 * @return GNUNET_YES (we should continue to iterate)
1816 process_reply (void *cls,
1817 const GNUNET_HashCode * key,
1820 struct ProcessReplyClosure *prq = cls;
1821 struct PendingRequest *pr = value;
1822 struct PendingMessage *reply;
1823 struct ClientResponseMessage *creply;
1824 struct ClientList *cl;
1825 struct PutMessage *pm;
1826 struct ConnectedPeer *cp;
1827 GNUNET_HashCode chash;
1828 GNUNET_HashCode mhash;
1832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1833 "Matched result (type %u) for query `%s' with pending request\n",
1834 (unsigned int) prq->type,
1837 GNUNET_STATISTICS_update (stats,
1838 gettext_noop ("# replies received and matched"),
1841 GNUNET_CRYPTO_hash (prq->data,
1846 case GNUNET_BLOCK_TYPE_DBLOCK:
1847 case GNUNET_BLOCK_TYPE_IBLOCK:
1848 /* only possible reply, stop requesting! */
1849 while (NULL != pr->pending_head)
1850 destroy_pending_message_list_entry (pr->pending_head);
1851 if (pr->drq != NULL)
1853 if (pr->client_request_list != NULL)
1854 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
1856 GNUNET_FS_drq_get_cancel (pr->drq);
1859 pr->do_remove = GNUNET_YES;
1860 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
1862 GNUNET_SCHEDULER_cancel (sched,
1864 pr->task = GNUNET_SCHEDULER_NO_TASK;
1866 GNUNET_break (GNUNET_YES ==
1867 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
1871 case GNUNET_BLOCK_TYPE_SBLOCK:
1872 if (pr->namespace == NULL)
1877 if (0 != memcmp (pr->namespace,
1879 sizeof (GNUNET_HashCode)))
1881 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1882 _("Reply mismatched in terms of namespace. Discarded.\n"));
1883 return GNUNET_YES; /* wrong namespace */
1885 /* then: fall-through! */
1886 case GNUNET_BLOCK_TYPE_KBLOCK:
1887 case GNUNET_BLOCK_TYPE_NBLOCK:
1890 mingle_hash (&chash, pr->mingle, &mhash);
1891 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (pr->bf,
1894 GNUNET_STATISTICS_update (stats,
1895 gettext_noop ("# duplicate replies discarded (bloomfilter)"),
1899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1900 "Duplicate response `%s', discarding.\n",
1901 GNUNET_h2s (&mhash));
1903 return GNUNET_YES; /* duplicate */
1906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1907 "New response `%s', adding to filter.\n",
1908 GNUNET_h2s (&mhash));
1911 if (pr->client_request_list != NULL)
1913 if (pr->replies_seen_size == pr->replies_seen_off)
1914 GNUNET_array_grow (pr->replies_seen,
1915 pr->replies_seen_size,
1916 pr->replies_seen_size * 2 + 4);
1917 pr->replies_seen[pr->replies_seen_off++] = chash;
1919 if ( (pr->bf == NULL) ||
1920 (pr->client_request_list != NULL) )
1921 refresh_bloomfilter (pr);
1922 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
1929 prq->priority += pr->remaining_priority;
1930 pr->remaining_priority = 0;
1931 if (pr->client_request_list != NULL)
1933 GNUNET_STATISTICS_update (stats,
1934 gettext_noop ("# replies received for local clients"),
1937 cl = pr->client_request_list->client_list;
1938 msize = sizeof (struct PutMessage) + prq->size;
1939 creply = GNUNET_malloc (msize + sizeof (struct ClientResponseMessage));
1940 creply->msize = msize;
1941 creply->client_list = cl;
1942 GNUNET_CONTAINER_DLL_insert_after (cl->res_head,
1946 pm = (struct PutMessage*) &creply[1];
1947 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
1948 pm->header.size = htons (msize);
1949 pm->type = htonl (prq->type);
1950 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
1951 memcpy (&pm[1], prq->data, prq->size);
1955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1956 "Transmitting result for query `%s' to client\n",
1959 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1961 GNUNET_TIME_UNIT_FOREVER_REL,
1962 &transmit_to_client,
1965 GNUNET_break (cl->th != NULL);
1967 destroy_pending_request (pr);
1973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1974 "Transmitting result for query `%s' to other peer (PID=%u)\n",
1976 (unsigned int) cp->pid);
1978 GNUNET_STATISTICS_update (stats,
1979 gettext_noop ("# replies received for other peers"),
1982 msize = sizeof (struct PutMessage) + prq->size;
1983 reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
1984 reply->cont = &transmit_reply_continuation;
1985 reply->cont_cls = pr;
1986 reply->msize = msize;
1987 reply->priority = (uint32_t) -1; /* send replies first! */
1988 pm = (struct PutMessage*) &reply[1];
1989 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
1990 pm->header.size = htons (msize);
1991 pm->type = htonl (prq->type);
1992 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
1993 memcpy (&pm[1], prq->data, prq->size);
1994 add_to_pending_messages_for_peer (cp, reply, pr);
1996 // FIXME: implement hot-path routing statistics keeping!
2002 * Handle P2P "PUT" message.
2004 * @param cls closure, always NULL
2005 * @param other the other peer involved (sender or receiver, NULL
2006 * for loopback messages where we are both sender and receiver)
2007 * @param message the actual message
2008 * @param latency reported latency of the connection with 'other'
2009 * @param distance reported distance (DV) to 'other'
2010 * @return GNUNET_OK to keep the connection open,
2011 * GNUNET_SYSERR to close it (signal serious error)
2014 handle_p2p_put (void *cls,
2015 const struct GNUNET_PeerIdentity *other,
2016 const struct GNUNET_MessageHeader *message,
2017 struct GNUNET_TIME_Relative latency,
2020 const struct PutMessage *put;
2023 enum GNUNET_BLOCK_Type type;
2024 struct GNUNET_TIME_Absolute expiration;
2025 GNUNET_HashCode query;
2026 struct ProcessReplyClosure prq;
2027 const struct SBlock *sb;
2029 msize = ntohs (message->size);
2030 if (msize < sizeof (struct PutMessage))
2033 return GNUNET_SYSERR;
2035 put = (const struct PutMessage*) message;
2036 dsize = msize - sizeof (struct PutMessage);
2037 type = ntohl (put->type);
2038 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
2041 GNUNET_BLOCK_check_block (type,
2046 GNUNET_break_op (0);
2047 return GNUNET_SYSERR;
2049 if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
2050 return GNUNET_SYSERR;
2051 if (GNUNET_BLOCK_TYPE_SBLOCK == type)
2053 sb = (const struct SBlock*) &put[1];
2054 GNUNET_CRYPTO_hash (&sb->subspace,
2055 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2061 "Received result for query `%s' from peer `%4s'\n",
2062 GNUNET_h2s (&query),
2063 GNUNET_i2s (other));
2065 GNUNET_STATISTICS_update (stats,
2066 gettext_noop ("# replies received (overall)"),
2069 /* now, lookup 'query' */
2070 prq.data = (const void*) &put[1];
2073 prq.expiration = expiration;
2075 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2079 // FIXME: if migration is on and load is low,
2080 // queue to store data in datastore;
2081 // use "prq.priority" for that!
2086 /* **************************** P2P GET Handling ************************ */
2090 * Closure for 'check_duplicate_request_{peer,client}'.
2092 struct CheckDuplicateRequestClosure
2095 * The new request we should check if it already exists.
2097 const struct PendingRequest *pr;
2100 * Existing request found by the checker, NULL if none.
2102 struct PendingRequest *have;
2107 * Iterator over entries in the 'query_request_map' that
2108 * tries to see if we have the same request pending from
2109 * the same client already.
2111 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2112 * @param key current key code (query, ignored, must match)
2113 * @param value value in the hash map (a 'struct PendingRequest'
2114 * that already exists)
2115 * @return GNUNET_YES if we should continue to
2116 * iterate (no match yet)
2117 * GNUNET_NO if not (match found).
2120 check_duplicate_request_client (void *cls,
2121 const GNUNET_HashCode * key,
2124 struct CheckDuplicateRequestClosure *cdc = cls;
2125 struct PendingRequest *have = value;
2127 if (have->client_request_list == NULL)
2129 if ( (cdc->pr->client_request_list->client_list->client == have->client_request_list->client_list->client) &&
2140 * We're processing (local) results for a search request
2141 * from another peer. Pass applicable results to the
2142 * peer and if we are done either clean up (operation
2143 * complete) or forward to other peers (more results possible).
2145 * @param cls our closure (struct LocalGetContext)
2146 * @param key key for the content
2147 * @param size number of bytes in data
2148 * @param data content stored
2149 * @param type type of the content
2150 * @param priority priority of the content
2151 * @param anonymity anonymity-level for the content
2152 * @param expiration expiration time for the content
2153 * @param uid unique identifier for the datum;
2154 * maybe 0 if no unique identifier is available
2157 process_local_reply (void *cls,
2158 const GNUNET_HashCode * key,
2161 enum GNUNET_BLOCK_Type type,
2164 struct GNUNET_TIME_Absolute
2168 struct PendingRequest *pr = cls;
2169 struct ProcessReplyClosure prq;
2170 struct CheckDuplicateRequestClosure cdrc;
2171 const struct SBlock *sb;
2172 GNUNET_HashCode dhash;
2173 GNUNET_HashCode mhash;
2174 GNUNET_HashCode query;
2179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2180 "Done processing local replies, forwarding request to other peers.\n");
2183 if (pr->client_request_list != NULL)
2185 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
2187 /* Figure out if this is a duplicate request and possibly
2188 merge 'struct PendingRequest' entries */
2191 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2193 &check_duplicate_request_client,
2195 if (cdrc.have != NULL)
2198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2199 "Received request for block `%s' twice from client, will only request once.\n",
2200 GNUNET_h2s (&pr->query));
2203 destroy_pending_request (pr);
2208 /* no more results */
2209 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2210 pr->task = GNUNET_SCHEDULER_add_now (sched,
2211 &forward_request_task,
2216 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2217 "New local response to `%s' of type %u.\n",
2221 if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
2224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2225 "Found ONDEMAND block, performing on-demand encoding\n");
2227 GNUNET_STATISTICS_update (stats,
2228 gettext_noop ("# on-demand blocks matched requests"),
2232 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
2233 anonymity, expiration, uid,
2234 &process_local_reply,
2236 GNUNET_FS_drq_get_next (GNUNET_YES);
2239 /* check for duplicates */
2240 GNUNET_CRYPTO_hash (data, size, &dhash);
2241 mingle_hash (&dhash,
2244 if ( (pr->bf != NULL) &&
2246 GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2251 "Result from datastore filtered by bloomfilter (duplicate).\n");
2253 GNUNET_STATISTICS_update (stats,
2254 gettext_noop ("# results filtered by query bloomfilter"),
2257 GNUNET_FS_drq_get_next (GNUNET_YES);
2261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2262 "Found result for query `%s' in local datastore\n",
2265 GNUNET_STATISTICS_update (stats,
2266 gettext_noop ("# results found locally"),
2269 pr->results_found++;
2270 memset (&prq, 0, sizeof (prq));
2272 prq.expiration = expiration;
2274 if (GNUNET_BLOCK_TYPE_SBLOCK == type)
2276 sb = (const struct SBlock*) data;
2277 GNUNET_CRYPTO_hash (&sb->subspace,
2278 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2281 if (GNUNET_OK != GNUNET_BLOCK_check_block (type,
2287 /* FIXME: consider removing the block? */
2288 GNUNET_FS_drq_get_next (GNUNET_YES);
2292 prq.priority = priority;
2293 process_reply (&prq, key, pr);
2295 if ( (type == GNUNET_BLOCK_TYPE_DBLOCK) ||
2296 (type == GNUNET_BLOCK_TYPE_IBLOCK) )
2298 GNUNET_FS_drq_get_next (GNUNET_NO);
2301 if ( (pr->client_request_list == NULL) &&
2302 ( (GNUNET_YES == test_load_too_high()) ||
2303 (pr->results_found > 5 + 2 * pr->priority) ) )
2306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2307 "Load too high, done with request\n");
2309 GNUNET_STATISTICS_update (stats,
2310 gettext_noop ("# processing result set cut short due to load"),
2313 GNUNET_FS_drq_get_next (GNUNET_NO);
2316 GNUNET_FS_drq_get_next (GNUNET_YES);
2321 * We've received a request with the specified priority. Bound it
2322 * according to how much we trust the given peer.
2324 * @param prio_in requested priority
2325 * @param cp the peer making the request
2326 * @return effective priority
2329 bound_priority (uint32_t prio_in,
2330 struct ConnectedPeer *cp)
2337 * Iterator over entries in the 'query_request_map' that
2338 * tries to see if we have the same request pending from
2339 * the same peer already.
2341 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2342 * @param key current key code (query, ignored, must match)
2343 * @param value value in the hash map (a 'struct PendingRequest'
2344 * that already exists)
2345 * @return GNUNET_YES if we should continue to
2346 * iterate (no match yet)
2347 * GNUNET_NO if not (match found).
2350 check_duplicate_request_peer (void *cls,
2351 const GNUNET_HashCode * key,
2354 struct CheckDuplicateRequestClosure *cdc = cls;
2355 struct PendingRequest *have = value;
2357 if (cdc->pr->target_pid == have->target_pid)
2367 * Handle P2P "GET" request.
2369 * @param cls closure, always NULL
2370 * @param other the other peer involved (sender or receiver, NULL
2371 * for loopback messages where we are both sender and receiver)
2372 * @param message the actual message
2373 * @param latency reported latency of the connection with 'other'
2374 * @param distance reported distance (DV) to 'other'
2375 * @return GNUNET_OK to keep the connection open,
2376 * GNUNET_SYSERR to close it (signal serious error)
2379 handle_p2p_get (void *cls,
2380 const struct GNUNET_PeerIdentity *other,
2381 const struct GNUNET_MessageHeader *message,
2382 struct GNUNET_TIME_Relative latency,
2385 struct PendingRequest *pr;
2386 struct ConnectedPeer *cp;
2387 struct ConnectedPeer *cps;
2388 struct CheckDuplicateRequestClosure cdc;
2389 struct GNUNET_TIME_Relative timeout;
2391 const struct GetMessage *gm;
2393 const GNUNET_HashCode *opt;
2396 uint32_t ttl_decrement;
2397 enum GNUNET_BLOCK_Type type;
2401 msize = ntohs(message->size);
2402 if (msize < sizeof (struct GetMessage))
2404 GNUNET_break_op (0);
2405 return GNUNET_SYSERR;
2407 gm = (const struct GetMessage*) message;
2408 type = ntohl (gm->type);
2411 case GNUNET_BLOCK_TYPE_ANY:
2412 case GNUNET_BLOCK_TYPE_DBLOCK:
2413 case GNUNET_BLOCK_TYPE_IBLOCK:
2414 case GNUNET_BLOCK_TYPE_KBLOCK:
2415 case GNUNET_BLOCK_TYPE_SBLOCK:
2418 GNUNET_break_op (0);
2419 return GNUNET_SYSERR;
2421 bm = ntohl (gm->hash_bitmap);
2429 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
2431 GNUNET_break_op (0);
2432 return GNUNET_SYSERR;
2434 opt = (const GNUNET_HashCode*) &gm[1];
2435 bfsize = msize - sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode);
2436 bm = ntohl (gm->hash_bitmap);
2437 if ( (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) &&
2438 (type != GNUNET_BLOCK_TYPE_SBLOCK) )
2440 GNUNET_break_op (0);
2441 return GNUNET_SYSERR;
2444 cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2445 &other->hashPubKey);
2448 /* peer must have just disconnected */
2449 GNUNET_STATISTICS_update (stats,
2450 gettext_noop ("# requests dropped due to initiator not being connected"),
2453 return GNUNET_SYSERR;
2455 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2456 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2463 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2465 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
2466 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 "Failed to find peer `%4s' in connection set. Dropping query.\n",
2471 GNUNET_i2s (other));
2473 GNUNET_STATISTICS_update (stats,
2474 gettext_noop ("# requests dropped due to missing reverse route"),
2477 /* FIXME: try connect? */
2480 /* note that we can really only check load here since otherwise
2481 peers could find out that we are overloaded by not being
2482 disconnected after sending us a malformed query... */
2483 if (GNUNET_YES == test_load_too_high ())
2486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2487 "Dropping query from `%s', this peer is too busy.\n",
2488 GNUNET_i2s (other));
2490 GNUNET_STATISTICS_update (stats,
2491 gettext_noop ("# requests dropped due to high load"),
2498 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2499 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
2500 GNUNET_h2s (&gm->query),
2501 (unsigned int) type,
2505 have_ns = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE));
2506 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2507 (have_ns ? sizeof(GNUNET_HashCode) : 0));
2509 pr->namespace = (GNUNET_HashCode*) &pr[1];
2511 pr->mingle = ntohl (gm->filter_mutator);
2512 if (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE))
2513 memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
2514 if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
2515 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
2517 pr->anonymity_level = 1;
2518 pr->priority = bound_priority (ntohl (gm->priority), cps);
2519 pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
2520 pr->query = gm->query;
2521 /* decrement ttl (always) */
2522 ttl_decrement = 2 * TTL_DECREMENT +
2523 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2525 if ( (pr->ttl < 0) &&
2526 (((int32_t)(pr->ttl - ttl_decrement)) > 0) )
2529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2530 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
2535 GNUNET_STATISTICS_update (stats,
2536 gettext_noop ("# requests dropped due TTL underflow"),
2539 /* integer underflow => drop (should be very rare)! */
2543 pr->ttl -= ttl_decrement;
2544 pr->start_time = GNUNET_TIME_absolute_get ();
2546 /* get bloom filter */
2549 pr->bf = GNUNET_CONTAINER_bloomfilter_init ((const char*) &opt[bits],
2552 pr->bf_size = bfsize;
2557 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2559 &check_duplicate_request_peer,
2561 if (cdc.have != NULL)
2563 if (cdc.have->start_time.value + cdc.have->ttl >=
2564 pr->start_time.value + pr->ttl)
2566 /* existing request has higher TTL, drop new one! */
2567 cdc.have->priority += pr->priority;
2568 destroy_pending_request (pr);
2570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2571 "Have existing request with higher TTL, dropping new request.\n",
2572 GNUNET_i2s (other));
2574 GNUNET_STATISTICS_update (stats,
2575 gettext_noop ("# requests dropped due to higher-TTL request"),
2582 /* existing request has lower TTL, drop old one! */
2583 pr->priority += cdc.have->priority;
2584 /* Possible optimization: if we have applicable pending
2585 replies in 'cdc.have', we might want to move those over
2586 (this is a really rare special-case, so it is not clear
2587 that this would be worth it) */
2588 destroy_pending_request (cdc.have);
2589 /* keep processing 'pr'! */
2594 GNUNET_break (GNUNET_OK ==
2595 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2598 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
2599 GNUNET_break (GNUNET_OK ==
2600 GNUNET_CONTAINER_multihashmap_put (peer_request_map,
2603 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
2605 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
2607 pr->start_time.value + pr->ttl);
2609 GNUNET_STATISTICS_update (stats,
2610 gettext_noop ("# P2P searches received"),
2613 GNUNET_STATISTICS_update (stats,
2614 gettext_noop ("# P2P searches active"),
2618 /* calculate change in traffic preference */
2619 preference = (double) pr->priority;
2620 if (preference < QUERY_BANDWIDTH_VALUE)
2621 preference = QUERY_BANDWIDTH_VALUE;
2622 cps->inc_preference += preference;
2624 /* process locally */
2625 if (type == GNUNET_BLOCK_TYPE_DBLOCK)
2626 type = GNUNET_BLOCK_TYPE_ANY; /* to get on-demand as well */
2627 timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
2628 (pr->priority + 1));
2629 pr->drq = GNUNET_FS_drq_get (&gm->query,
2631 &process_local_reply,
2636 /* Are multiple results possible? If so, start processing remotely now! */
2639 case GNUNET_BLOCK_TYPE_DBLOCK:
2640 case GNUNET_BLOCK_TYPE_IBLOCK:
2641 /* only one result, wait for datastore */
2644 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2645 pr->task = GNUNET_SCHEDULER_add_now (sched,
2646 &forward_request_task,
2650 /* make sure we don't track too many requests */
2651 if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
2653 pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
2654 destroy_pending_request (pr);
2660 /* **************************** CS GET Handling ************************ */
2664 * Handle START_SEARCH-message (search request from client).
2666 * @param cls closure
2667 * @param client identification of the client
2668 * @param message the actual message
2671 handle_start_search (void *cls,
2672 struct GNUNET_SERVER_Client *client,
2673 const struct GNUNET_MessageHeader *message)
2675 static GNUNET_HashCode all_zeros;
2676 const struct SearchMessage *sm;
2677 struct ClientList *cl;
2678 struct ClientRequestList *crl;
2679 struct PendingRequest *pr;
2682 enum GNUNET_BLOCK_Type type;
2684 msize = ntohs (message->size);
2685 if ( (msize < sizeof (struct SearchMessage)) ||
2686 (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
2689 GNUNET_SERVER_receive_done (client,
2693 GNUNET_STATISTICS_update (stats,
2694 gettext_noop ("# client searches received"),
2697 sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
2698 sm = (const struct SearchMessage*) message;
2699 type = ntohl (sm->type);
2701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2702 "Received request for `%s' of type %u from local client\n",
2703 GNUNET_h2s (&sm->query),
2704 (unsigned int) type);
2708 case GNUNET_BLOCK_TYPE_ANY:
2709 case GNUNET_BLOCK_TYPE_DBLOCK:
2710 case GNUNET_BLOCK_TYPE_IBLOCK:
2711 case GNUNET_BLOCK_TYPE_KBLOCK:
2712 case GNUNET_BLOCK_TYPE_SBLOCK:
2713 case GNUNET_BLOCK_TYPE_NBLOCK:
2717 GNUNET_SERVER_receive_done (client,
2723 while ( (cl != NULL) &&
2724 (cl->client != client) )
2728 cl = GNUNET_malloc (sizeof (struct ClientList));
2729 cl->client = client;
2730 GNUNET_SERVER_client_keep (client);
2731 cl->next = client_list;
2734 /* detect duplicate KBLOCK requests */
2735 if ( (type == GNUNET_BLOCK_TYPE_KBLOCK) ||
2736 (type == GNUNET_BLOCK_TYPE_NBLOCK) ||
2737 (type == GNUNET_BLOCK_TYPE_ANY) )
2740 while ( (crl != NULL) &&
2741 ( (0 != memcmp (&crl->req->query,
2743 sizeof (GNUNET_HashCode))) ||
2744 (crl->req->type != type) ) )
2749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2750 "Have existing request, merging content-seen lists.\n");
2753 /* Duplicate request (used to send long list of
2754 known/blocked results); merge 'pr->replies_seen'
2755 and update bloom filter */
2756 GNUNET_array_grow (pr->replies_seen,
2757 pr->replies_seen_size,
2758 pr->replies_seen_off + sc);
2759 memcpy (&pr->replies_seen[pr->replies_seen_off],
2761 sc * sizeof (GNUNET_HashCode));
2762 pr->replies_seen_off += sc;
2763 refresh_bloomfilter (pr);
2764 GNUNET_STATISTICS_update (stats,
2765 gettext_noop ("# client searches updated (merged content seen list)"),
2768 GNUNET_SERVER_receive_done (client,
2773 GNUNET_STATISTICS_update (stats,
2774 gettext_noop ("# client searches active"),
2777 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2778 ((type == GNUNET_BLOCK_TYPE_SBLOCK) ? sizeof(GNUNET_HashCode) : 0));
2779 crl = GNUNET_malloc (sizeof (struct ClientRequestList));
2780 memset (crl, 0, sizeof (struct ClientRequestList));
2781 crl->client_list = cl;
2782 GNUNET_CONTAINER_DLL_insert (cl->rl_head,
2787 pr->client_request_list = crl;
2788 GNUNET_array_grow (pr->replies_seen,
2789 pr->replies_seen_size,
2791 memcpy (pr->replies_seen,
2793 sc * sizeof (GNUNET_HashCode));
2794 pr->replies_seen_off = sc;
2795 pr->anonymity_level = ntohl (sm->anonymity_level);
2796 refresh_bloomfilter (pr);
2797 pr->query = sm->query;
2798 if (0 == (1 & ntohl (sm->options)))
2799 pr->local_only = GNUNET_NO;
2801 pr->local_only = GNUNET_YES;
2804 case GNUNET_BLOCK_TYPE_DBLOCK:
2805 case GNUNET_BLOCK_TYPE_IBLOCK:
2806 if (0 != memcmp (&sm->target,
2808 sizeof (GNUNET_HashCode)))
2809 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
2811 case GNUNET_BLOCK_TYPE_SBLOCK:
2812 pr->namespace = (GNUNET_HashCode*) &pr[1];
2813 memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
2818 GNUNET_break (GNUNET_OK ==
2819 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2822 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
2823 if (type == GNUNET_BLOCK_TYPE_DBLOCK)
2824 type = GNUNET_BLOCK_TYPE_ANY; /* get on-demand blocks too! */
2825 pr->drq = GNUNET_FS_drq_get (&sm->query,
2827 &process_local_reply,
2829 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
2834 /* **************************** Startup ************************ */
2838 * List of handlers for P2P messages
2839 * that we care about.
2841 static struct GNUNET_CORE_MessageHandler p2p_handlers[] =
2844 GNUNET_MESSAGE_TYPE_FS_GET, 0 },
2846 GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
2852 * List of handlers for the messages understood by this
2855 static struct GNUNET_SERVER_MessageHandler handlers[] = {
2856 {&GNUNET_FS_handle_index_start, NULL,
2857 GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
2858 {&GNUNET_FS_handle_index_list_get, NULL,
2859 GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
2860 {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
2861 sizeof (struct UnindexMessage) },
2862 {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
2869 * Process fs requests.
2871 * @param s scheduler to use
2872 * @param server the initialized server
2873 * @param c configuration to use
2876 main_init (struct GNUNET_SCHEDULER_Handle *s,
2877 struct GNUNET_SERVER_Handle *server,
2878 const struct GNUNET_CONFIGURATION_Handle *c)
2882 stats = GNUNET_STATISTICS_create (sched, "fs", cfg);
2883 connected_peers = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
2884 query_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
2885 peer_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
2886 requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
2887 core = GNUNET_CORE_connect (sched,
2889 GNUNET_TIME_UNIT_FOREVER_REL,
2892 &peer_connect_handler,
2893 &peer_disconnect_handler,
2899 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2900 _("Failed to connect to `%s' service.\n"),
2902 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
2903 connected_peers = NULL;
2904 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
2905 query_request_map = NULL;
2906 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
2907 requests_by_expiration_heap = NULL;
2908 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
2909 peer_request_map = NULL;
2911 return GNUNET_SYSERR;
2913 GNUNET_SERVER_disconnect_notify (server,
2914 &handle_client_disconnect,
2916 GNUNET_SERVER_add_handlers (server, handlers);
2917 GNUNET_SCHEDULER_add_delayed (sched,
2918 GNUNET_TIME_UNIT_FOREVER_REL,
2926 * Process fs requests.
2928 * @param cls closure
2929 * @param sched scheduler to use
2930 * @param server the initialized server
2931 * @param cfg configuration to use
2935 struct GNUNET_SCHEDULER_Handle *sched,
2936 struct GNUNET_SERVER_Handle *server,
2937 const struct GNUNET_CONFIGURATION_Handle *cfg)
2939 if ( (GNUNET_OK != GNUNET_FS_drq_init (sched, cfg)) ||
2940 (GNUNET_OK != GNUNET_FS_indexing_init (sched, cfg)) ||
2941 (GNUNET_OK != main_init (sched, server, cfg)) )
2943 GNUNET_SCHEDULER_shutdown (sched);
2950 * The main function for the fs service.
2952 * @param argc number of arguments from the command line
2953 * @param argv command line arguments
2954 * @return 0 ok, 1 on error
2957 main (int argc, char *const *argv)
2959 return (GNUNET_OK ==
2960 GNUNET_SERVICE_run (argc,
2963 GNUNET_SERVICE_OPTION_NONE,
2964 &run, NULL)) ? 0 : 1;
2967 /* end of gnunet-service-fs.c */