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 * - code not clear in terms of which function initializes bloomfilter when!
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.
546 * Remove this request after transmission of the current response.
556 static struct GNUNET_SCHEDULER_Handle *sched;
561 static const struct GNUNET_CONFIGURATION_Handle *cfg;
564 * Map of peer identifiers to "struct ConnectedPeer" (for that peer).
566 static struct GNUNET_CONTAINER_MultiHashMap *connected_peers;
569 * Map of peer identifiers to "struct PendingRequest" (for that peer).
571 static struct GNUNET_CONTAINER_MultiHashMap *peer_request_map;
574 * Map of query identifiers to "struct PendingRequest" (for that query).
576 static struct GNUNET_CONTAINER_MultiHashMap *query_request_map;
579 * Heap with the request that will expire next at the top. Contains
580 * pointers of type "struct PendingRequest*"; these will *also* be
581 * aliased from the "requests_by_peer" data structures and the
582 * "requests_by_query" table. Note that requests from our clients
583 * don't expire and are thus NOT in the "requests_by_expiration"
584 * (or the "requests_by_peer" tables).
586 static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
589 * Handle for reporting statistics.
591 static struct GNUNET_STATISTICS_Handle *stats;
594 * Linked list of clients we are currently processing requests for.
596 static struct ClientList *client_list;
599 * Pointer to handle to the core service (points to NULL until we've
602 static struct GNUNET_CORE_Handle *core;
605 /* ******************* clean up functions ************************ */
609 * We're done with a particular message list entry.
610 * Free all associated resources.
612 * @param pml entry to destroy
615 destroy_pending_message_list_entry (struct PendingMessageList *pml)
617 GNUNET_CONTAINER_DLL_remove (pml->req->pending_head,
618 pml->req->pending_tail,
620 GNUNET_CONTAINER_DLL_remove (pml->target->pending_messages_head,
621 pml->target->pending_messages_tail,
623 pml->target->pending_requests--;
624 GNUNET_free (pml->pm);
630 * Destroy the given pending message (and call the respective
633 * @param pm message to destroy
634 * @param tpid id of peer that the message was delivered to, or 0 for none
637 destroy_pending_message (struct PendingMessage *pm,
640 struct PendingMessageList *pml = pm->pml;
641 TransmissionContinuation cont;
644 GNUNET_assert (pml->pm == pm);
645 GNUNET_assert ( (tpid == 0) || (tpid == pml->target->pid) );
647 cont_cls = pm->cont_cls;
648 destroy_pending_message_list_entry (pml);
649 cont (cont_cls, tpid);
654 * We're done processing a particular request.
655 * Free all associated resources.
657 * @param pr request to destroy
660 destroy_pending_request (struct PendingRequest *pr)
662 struct GNUNET_PeerIdentity pid;
664 if (pr->hnode != NULL)
666 GNUNET_CONTAINER_heap_remove_node (requests_by_expiration_heap,
669 GNUNET_STATISTICS_update (stats,
670 gettext_noop ("# P2P searches active"),
676 GNUNET_STATISTICS_update (stats,
677 gettext_noop ("# client searches active"),
681 /* might have already been removed from map in 'process_reply' (if
682 there was a unique reply) or never inserted if it was a
683 duplicate; hence ignore the return value here */
684 (void) GNUNET_CONTAINER_multihashmap_remove (query_request_map,
689 GNUNET_FS_drq_get_cancel (pr->drq);
692 if (pr->client_request_list != NULL)
694 GNUNET_CONTAINER_DLL_remove (pr->client_request_list->client_list->rl_head,
695 pr->client_request_list->client_list->rl_tail,
696 pr->client_request_list);
697 GNUNET_free (pr->client_request_list);
698 pr->client_request_list = NULL;
702 GNUNET_PEER_resolve (pr->cp->pid,
704 (void) GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
711 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
716 GNUNET_CORE_peer_change_preference_cancel (pr->irc);
719 if (pr->replies_seen != NULL)
721 GNUNET_free (pr->replies_seen);
722 pr->replies_seen = NULL;
724 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
726 GNUNET_SCHEDULER_cancel (sched,
728 pr->task = GNUNET_SCHEDULER_NO_TASK;
730 while (NULL != pr->pending_head)
731 destroy_pending_message_list_entry (pr->pending_head);
732 GNUNET_PEER_change_rc (pr->target_pid, -1);
733 if (pr->used_pids != NULL)
735 GNUNET_PEER_decrement_rcs (pr->used_pids, pr->used_pids_off);
736 GNUNET_free (pr->used_pids);
737 pr->used_pids_off = 0;
738 pr->used_pids_size = 0;
739 pr->used_pids = NULL;
746 * Method called whenever a given peer connects.
748 * @param cls closure, not used
749 * @param peer peer identity this notification is about
750 * @param latency reported latency of the connection with 'other'
751 * @param distance reported distance (DV) to 'other'
754 peer_connect_handler (void *cls,
756 GNUNET_PeerIdentity * peer,
757 struct GNUNET_TIME_Relative latency,
760 struct ConnectedPeer *cp;
762 cp = GNUNET_malloc (sizeof (struct ConnectedPeer));
763 cp->pid = GNUNET_PEER_intern (peer);
764 GNUNET_CONTAINER_multihashmap_put (connected_peers,
767 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
772 * Free (each) request made by the peer.
774 * @param cls closure, points to peer that the request belongs to
775 * @param key current key code
776 * @param value value in the hash map
777 * @return GNUNET_YES (we should continue to iterate)
780 destroy_request (void *cls,
781 const GNUNET_HashCode * key,
784 const struct GNUNET_PeerIdentity * peer = cls;
785 struct PendingRequest *pr = value;
787 GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
790 destroy_pending_request (pr);
796 * Method called whenever a peer disconnects.
798 * @param cls closure, not used
799 * @param peer peer identity this notification is about
802 peer_disconnect_handler (void *cls,
804 GNUNET_PeerIdentity * peer)
806 struct ConnectedPeer *cp;
807 struct PendingMessage *pm;
810 GNUNET_CONTAINER_multihashmap_get_multiple (peer_request_map,
814 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
818 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
820 if (NULL != cp->last_client_replies[i])
822 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
823 cp->last_client_replies[i] = NULL;
826 GNUNET_CONTAINER_multihashmap_remove (connected_peers,
829 GNUNET_PEER_change_rc (cp->pid, -1);
830 GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
832 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
833 while (NULL != (pm = cp->pending_messages_head))
834 destroy_pending_message (pm, 0 /* delivery failed */);
835 GNUNET_break (0 == cp->pending_requests);
841 * Iterator over hash map entries that removes all occurences
842 * of the given 'client' from the 'last_client_replies' of the
843 * given connected peer.
845 * @param cls closure, the 'struct GNUNET_SERVER_Client*' to remove
846 * @param key current key code (unused)
847 * @param value value in the hash map (the 'struct ConnectedPeer*' to change)
848 * @return GNUNET_YES (we should continue to iterate)
851 remove_client_from_last_client_replies (void *cls,
852 const GNUNET_HashCode * key,
855 struct GNUNET_SERVER_Client *client = cls;
856 struct ConnectedPeer *cp = value;
859 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
861 if (cp->last_client_replies[i] == client)
863 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
864 cp->last_client_replies[i] = NULL;
872 * A client disconnected. Remove all of its pending queries.
874 * @param cls closure, NULL
875 * @param client identification of the client
878 handle_client_disconnect (void *cls,
879 struct GNUNET_SERVER_Client
882 struct ClientList *pos;
883 struct ClientList *prev;
884 struct ClientRequestList *rcl;
885 struct ClientResponseMessage *creply;
891 while ( (NULL != pos) &&
892 (pos->client != client) )
898 return; /* no requests pending for this client */
899 while (NULL != (rcl = pos->rl_head))
901 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
902 "Destroying pending request `%s' on disconnect\n",
903 GNUNET_h2s (&rcl->req->query));
904 destroy_pending_request (rcl->req);
907 client_list = pos->next;
909 prev->next = pos->next;
912 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
915 while (NULL != (creply = pos->res_head))
917 GNUNET_CONTAINER_DLL_remove (pos->res_head,
920 GNUNET_free (creply);
922 GNUNET_SERVER_client_drop (pos->client);
924 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
925 &remove_client_from_last_client_replies,
931 * Iterator to free peer entries.
933 * @param cls closure, unused
934 * @param key current key code
935 * @param value value in the hash map (peer entry)
936 * @return GNUNET_YES (we should continue to iterate)
939 clean_peer (void *cls,
940 const GNUNET_HashCode * key,
943 peer_disconnect_handler (NULL, (const struct GNUNET_PeerIdentity*) key);
949 * Task run during shutdown.
955 shutdown_task (void *cls,
956 const struct GNUNET_SCHEDULER_TaskContext *tc)
958 while (client_list != NULL)
959 handle_client_disconnect (NULL,
960 client_list->client);
961 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
964 GNUNET_break (0 == GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap));
965 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
966 requests_by_expiration_heap = 0;
967 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
968 connected_peers = NULL;
969 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
970 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
971 query_request_map = NULL;
972 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
973 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
974 peer_request_map = NULL;
975 GNUNET_assert (NULL != core);
976 GNUNET_CORE_disconnect (core);
980 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
988 /* ******************* Utility functions ******************** */
992 * Transmit the given message by copying it to the target buffer
993 * "buf". "buf" will be NULL and "size" zero if the socket was closed
994 * for writing in the meantime. In that case, do nothing
995 * (the disconnect or shutdown handler will take care of the rest).
996 * If we were able to transmit messages and there are still more
997 * pending, ask core again for further calls to this function.
999 * @param cls closure, pointer to the 'struct ConnectedPeer*'
1000 * @param size number of bytes available in buf
1001 * @param buf where the callee should write the message
1002 * @return number of bytes written to buf
1005 transmit_to_peer (void *cls,
1006 size_t size, void *buf)
1008 struct ConnectedPeer *cp = cls;
1010 struct GNUNET_PeerIdentity pid;
1011 struct PendingMessage *pm;
1013 struct PendingRequest *pr;
1019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1020 "Dropping message, core too busy.\n");
1025 while ( (NULL != (pm = cp->pending_messages_head) ) &&
1026 (pm->msize <= size) )
1028 memcpy (&cbuf[msize], &pm[1], pm->msize);
1032 destroy_pending_message (pm, cp->pid);
1036 GNUNET_PEER_resolve (cp->pid,
1038 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1040 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1048 "Transmitting %u bytes to peer %u.\n",
1057 * Add a message to the set of pending messages for the given peer.
1059 * @param cp peer to send message to
1060 * @param pm message to queue
1061 * @param pr request on which behalf this message is being queued
1064 add_to_pending_messages_for_peer (struct ConnectedPeer *cp,
1065 struct PendingMessage *pm,
1066 struct PendingRequest *pr)
1068 struct PendingMessage *pos;
1069 struct PendingMessageList *pml;
1070 struct GNUNET_PeerIdentity pid;
1072 GNUNET_assert (pm->next == NULL);
1073 GNUNET_assert (pm->pml == NULL);
1074 pml = GNUNET_malloc (sizeof (struct PendingMessageList));
1079 GNUNET_CONTAINER_DLL_insert (pr->pending_head,
1082 pos = cp->pending_messages_head;
1083 while ( (pos != NULL) &&
1084 (pm->priority < pos->priority) )
1086 GNUNET_CONTAINER_DLL_insert_after (cp->pending_messages_head,
1087 cp->pending_messages_tail,
1090 cp->pending_requests++;
1091 if (cp->pending_requests > MAX_QUEUE_PER_PEER)
1092 destroy_pending_message (cp->pending_messages_tail, 0);
1093 if (cp->cth == NULL)
1095 /* need to schedule transmission */
1096 GNUNET_PEER_resolve (cp->pid, &pid);
1097 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1098 cp->pending_messages_head->priority,
1101 cp->pending_messages_head->msize,
1105 if (cp->cth == NULL)
1108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1109 "Failed to schedule transmission with core!\n");
1111 /* FIXME: call stats (rare, bad case) */
1117 * Mingle hash with the mingle_number to produce different bits.
1120 mingle_hash (const GNUNET_HashCode * in,
1121 int32_t mingle_number,
1122 GNUNET_HashCode * hc)
1126 GNUNET_CRYPTO_hash (&mingle_number,
1129 GNUNET_CRYPTO_hash_xor (&m, in, hc);
1134 * Test if the load on this peer is too high
1135 * to even consider processing the query at
1138 * @return GNUNET_YES if the load is too high, GNUNET_NO otherwise
1141 test_load_too_high ()
1143 return GNUNET_NO; // FIXME
1147 /* ******************* Pending Request Refresh Task ******************** */
1152 * We use a random delay to make the timing of requests less
1153 * predictable. This function returns such a random delay. We add a base
1154 * delay of MAX_CORK_DELAY (1s).
1156 * FIXME: make schedule dependent on the specifics of the request?
1157 * Or bandwidth and number of connected peers and load?
1159 * @return random delay to use for some request, between 1s and 1000+TTL_DECREMENT ms
1161 static struct GNUNET_TIME_Relative
1162 get_processing_delay ()
1165 GNUNET_TIME_relative_add (GNUNET_CONSTANTS_MAX_CORK_DELAY,
1166 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1167 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1173 * We're processing a GET request from another peer and have decided
1174 * to forward it to other peers. This function is called periodically
1175 * and should forward the request to other peers until we have all
1176 * possible replies. If we have transmitted the *only* reply to
1177 * the initiator we should destroy the pending request. If we have
1178 * many replies in the queue to the initiator, we should delay sending
1179 * out more queries until the reply queue has shrunk some.
1181 * @param cls our "struct ProcessGetContext *"
1185 forward_request_task (void *cls,
1186 const struct GNUNET_SCHEDULER_TaskContext *tc);
1190 * Function called after we either failed or succeeded
1191 * at transmitting a query to a peer.
1193 * @param cls the requests "struct PendingRequest*"
1194 * @param tpid ID of receiving peer, 0 on transmission error
1197 transmit_query_continuation (void *cls,
1198 GNUNET_PEER_Id tpid)
1200 struct PendingRequest *pr = cls;
1205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1206 "Transmission of request failed, will try again later.\n");
1208 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1209 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1210 get_processing_delay (),
1211 &forward_request_task,
1215 GNUNET_STATISTICS_update (stats,
1216 gettext_noop ("# queries forwarded"),
1219 GNUNET_PEER_change_rc (tpid, 1);
1220 if (pr->used_pids_off == pr->used_pids_size)
1221 GNUNET_array_grow (pr->used_pids,
1223 pr->used_pids_size * 2 + 2);
1224 pr->used_pids[pr->used_pids_off++] = tpid;
1225 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1226 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1227 get_processing_delay (),
1228 &forward_request_task,
1234 * How many bytes should a bloomfilter be if we have already seen
1235 * entry_count responses? Note that BLOOMFILTER_K gives us the number
1236 * of bits set per entry. Furthermore, we should not re-size the
1237 * filter too often (to keep it cheap).
1239 * Since other peers will also add entries but not resize the filter,
1240 * we should generally pick a slightly larger size than what the
1241 * strict math would suggest.
1243 * @return must be a power of two and smaller or equal to 2^15.
1246 compute_bloomfilter_size (unsigned int entry_count)
1249 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
1250 uint16_t max = 1 << 15;
1252 if (entry_count > max)
1255 while ((size < max) && (size < ideal))
1264 * Recalculate our bloom filter for filtering replies.
1266 * @param count number of entries we are filtering right now
1267 * @param mingle set to our new mingling value
1268 * @param bf_size set to the size of the bloomfilter
1269 * @param entries the entries to filter
1270 * @return updated bloomfilter, NULL for none
1272 static struct GNUNET_CONTAINER_BloomFilter *
1273 refresh_bloomfilter (unsigned int count,
1276 const GNUNET_HashCode *entries)
1278 struct GNUNET_CONTAINER_BloomFilter *bf;
1281 GNUNET_HashCode mhash;
1285 nsize = compute_bloomfilter_size (count);
1286 *mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, -1);
1288 bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
1291 for (i=0;i<count;i++)
1293 mingle_hash (&entries[i], *mingle, &mhash);
1294 GNUNET_CONTAINER_bloomfilter_add (bf, &mhash);
1301 * Function called after we've tried to reserve a certain amount of
1302 * bandwidth for a reply. Check if we succeeded and if so send our
1305 * @param cls the requests "struct PendingRequest*"
1306 * @param peer identifies the peer
1307 * @param bpm_in set to the current bandwidth limit (receiving) for this peer
1308 * @param bpm_out set to the current bandwidth limit (sending) for this peer
1309 * @param amount set to the amount that was actually reserved or unreserved
1310 * @param preference current traffic preference for the given peer
1313 target_reservation_cb (void *cls,
1315 GNUNET_PeerIdentity * peer,
1316 struct GNUNET_BANDWIDTH_Value32NBO bpm_in,
1317 struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
1319 uint64_t preference)
1321 struct PendingRequest *pr = cls;
1322 struct ConnectedPeer *cp;
1323 struct PendingMessage *pm;
1324 struct GetMessage *gm;
1325 GNUNET_HashCode *ext;
1335 /* error in communication with core, try again later */
1336 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1337 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1338 get_processing_delay (),
1339 &forward_request_task,
1343 // (3) transmit, update ttl/priority
1344 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1348 /* Peer must have just left */
1350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1351 "Selected peer disconnected!\n");
1353 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1354 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1355 get_processing_delay (),
1356 &forward_request_task,
1360 no_route = GNUNET_NO;
1361 /* FIXME: check against DBLOCK_SIZE and possibly return
1362 amount to reserve; however, this also needs to work
1363 with testcases which currently start out with a far
1364 too low per-peer bw limit, so they would never send
1365 anything. Big issue. */
1371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1372 "Failed to reserve bandwidth for reply (got %d/%u bytes only)!\n",
1376 GNUNET_STATISTICS_update (stats,
1377 gettext_noop ("# reply bandwidth reservation requests failed"),
1380 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1381 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1382 get_processing_delay (),
1383 &forward_request_task,
1385 return; /* this target round failed */
1387 /* FIXME: if we are "quite" busy, we may still want to skip
1388 this round; need more load detection code! */
1389 no_route = GNUNET_YES;
1392 GNUNET_STATISTICS_update (stats,
1393 gettext_noop ("# requests forwarded"),
1396 /* build message and insert message into priority queue */
1398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1399 "Forwarding request `%s' to `%4s'!\n",
1400 GNUNET_h2s (&pr->query),
1405 if (GNUNET_YES == no_route)
1407 bm |= GET_MESSAGE_BIT_RETURN_TO;
1410 if (pr->namespace != NULL)
1412 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
1415 if (pr->target_pid != 0)
1417 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
1420 msize = sizeof (struct GetMessage) + pr->bf_size + k * sizeof(GNUNET_HashCode);
1421 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1422 pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1424 gm = (struct GetMessage*) &pm[1];
1425 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
1426 gm->header.size = htons (msize);
1427 gm->type = htonl (pr->type);
1428 pr->remaining_priority /= 2;
1429 gm->priority = htonl (pr->remaining_priority);
1430 gm->ttl = htonl (pr->ttl);
1431 gm->filter_mutator = htonl(pr->mingle);
1432 gm->hash_bitmap = htonl (bm);
1433 gm->query = pr->query;
1434 ext = (GNUNET_HashCode*) &gm[1];
1436 if (GNUNET_YES == no_route)
1437 GNUNET_PEER_resolve (pr->cp->pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1438 if (pr->namespace != NULL)
1439 memcpy (&ext[k++], pr->namespace, sizeof (GNUNET_HashCode));
1440 if (pr->target_pid != 0)
1441 GNUNET_PEER_resolve (pr->target_pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1442 bfdata = (char *) &ext[k];
1444 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
1447 pm->cont = &transmit_query_continuation;
1449 add_to_pending_messages_for_peer (cp, pm, pr);
1454 * Closure used for "target_peer_select_cb".
1456 struct PeerSelectionContext
1459 * The request for which we are selecting
1462 struct PendingRequest *pr;
1465 * Current "prime" target.
1467 struct GNUNET_PeerIdentity target;
1470 * How much do we like this target?
1472 double target_score;
1478 * Function called for each connected peer to determine
1479 * which one(s) would make good targets for forwarding.
1481 * @param cls closure (struct PeerSelectionContext)
1482 * @param key current key code (peer identity)
1483 * @param value value in the hash map (struct ConnectedPeer)
1484 * @return GNUNET_YES if we should continue to
1489 target_peer_select_cb (void *cls,
1490 const GNUNET_HashCode * key,
1493 struct PeerSelectionContext *psc = cls;
1494 struct ConnectedPeer *cp = value;
1495 struct PendingRequest *pr = psc->pr;
1500 /* 1) check if we have already (recently) forwarded to this peer */
1502 for (i=0;i<pr->used_pids_off;i++)
1503 if (pr->used_pids[i] == cp->pid)
1506 if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1507 RETRY_PROBABILITY_INV))
1510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1511 "NOT re-trying query that was previously transmitted %u times\n",
1512 (unsigned int) pr->used_pids_off);
1514 return GNUNET_YES; /* skip */
1519 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1520 "Re-trying query that was previously transmitted %u times to this peer\n",
1523 // 2) calculate how much we'd like to forward to this peer
1524 score = 42; // FIXME!
1525 // FIXME: also need API to gather data on responsiveness
1526 // of this peer (we have fields for that in 'cp', but
1527 // they are never set!)
1529 /* store best-fit in closure */
1530 if (score > psc->target_score)
1532 psc->target_score = score;
1533 psc->target.hashPubKey = *key;
1540 * We're processing a GET request from another peer and have decided
1541 * to forward it to other peers. This function is called periodically
1542 * and should forward the request to other peers until we have all
1543 * possible replies. If we have transmitted the *only* reply to
1544 * the initiator we should destroy the pending request. If we have
1545 * many replies in the queue to the initiator, we should delay sending
1546 * out more queries until the reply queue has shrunk some.
1548 * @param cls our "struct ProcessGetContext *"
1552 forward_request_task (void *cls,
1553 const struct GNUNET_SCHEDULER_TaskContext *tc)
1555 struct PendingRequest *pr = cls;
1556 struct PeerSelectionContext psc;
1557 struct ConnectedPeer *cp;
1558 struct GNUNET_TIME_Relative delay;
1560 pr->task = GNUNET_SCHEDULER_NO_TASK;
1561 if (pr->irc != NULL)
1564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1565 "Forwarding of query `%s' not attempted due to pending local lookup!\n",
1566 GNUNET_h2s (&pr->query));
1568 return; /* already pending */
1570 /* (1) select target */
1572 psc.target_score = DBL_MIN;
1573 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1574 &target_peer_select_cb,
1576 if (psc.target_score == DBL_MIN)
1578 delay = get_processing_delay ();
1580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1581 "No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
1582 GNUNET_h2s (&pr->query),
1585 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1587 &forward_request_task,
1589 return; /* nobody selected */
1592 /* (2) reserve reply bandwidth */
1593 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1594 &psc.target.hashPubKey);
1595 pr->irc = GNUNET_CORE_peer_change_preference (sched, cfg,
1597 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1598 GNUNET_BANDWIDTH_value_init ((uint32_t) -1 /* no limit */),
1600 (uint64_t) cp->inc_preference,
1601 &target_reservation_cb,
1603 cp->inc_preference = 0.0;
1607 /* **************************** P2P PUT Handling ************************ */
1611 * Function called after we either failed or succeeded
1612 * at transmitting a reply to a peer.
1614 * @param cls the requests "struct PendingRequest*"
1615 * @param tpid ID of receiving peer, 0 on transmission error
1618 transmit_reply_continuation (void *cls,
1619 GNUNET_PEER_Id tpid)
1621 struct PendingRequest *pr = cls;
1625 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
1626 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
1627 /* only one reply expected, done with the request! */
1628 destroy_pending_request (pr);
1630 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
1631 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
1632 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
1642 * Check if the given KBlock is well-formed.
1644 * @param kb the kblock data (or at least "dsize" bytes claiming to be one)
1645 * @param dsize size of "kb" in bytes; check for < sizeof(struct KBlock)!
1646 * @param query where to store the query that this block answers
1647 * @return GNUNET_OK if this is actually a well-formed KBlock
1650 check_kblock (const struct KBlock *kb,
1652 GNUNET_HashCode *query)
1654 if (dsize < sizeof (struct KBlock))
1656 GNUNET_break_op (0);
1657 return GNUNET_SYSERR;
1659 if (dsize - sizeof (struct KBlock) !=
1660 ntohl (kb->purpose.size)
1661 - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
1662 - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
1664 GNUNET_break_op (0);
1665 return GNUNET_SYSERR;
1668 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_KBLOCK,
1673 GNUNET_break_op (0);
1674 return GNUNET_SYSERR;
1677 GNUNET_CRYPTO_hash (&kb->keyspace,
1678 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1685 * Check if the given NBlock is well-formed.
1687 * @param nb the nblock data (or at least "dsize" bytes claiming to be one)
1688 * @param dsize size of "nb" in bytes; check for < sizeof(struct NBlock)!
1689 * @param query where to store the query that this block answers
1690 * @return GNUNET_OK if this is actually a well-formed NBlock
1693 check_nblock (const struct NBlock *nb,
1695 GNUNET_HashCode *query)
1697 if (dsize < sizeof (struct NBlock))
1699 GNUNET_break_op (0);
1700 return GNUNET_SYSERR;
1702 if (dsize - sizeof (struct NBlock) !=
1703 ntohl (nb->ns_purpose.size)
1704 - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
1705 - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
1707 GNUNET_break_op (0);
1708 return GNUNET_SYSERR;
1711 ntohl (nb->ksk_purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
1713 GNUNET_break_op (0);
1714 return GNUNET_SYSERR;
1717 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK_KSIG,
1722 GNUNET_break_op (0);
1723 return GNUNET_SYSERR;
1726 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK,
1731 GNUNET_break_op (0);
1732 return GNUNET_SYSERR;
1735 GNUNET_CRYPTO_hash (&nb->keyspace,
1736 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1743 * Check if the given SBlock is well-formed.
1745 * @param sb the sblock data (or at least "dsize" bytes claiming to be one)
1746 * @param dsize size of "kb" in bytes; check for < sizeof(struct SBlock)!
1747 * @param query where to store the query that this block answers
1748 * @param namespace where to store the namespace that this block belongs to
1749 * @return GNUNET_OK if this is actually a well-formed SBlock
1752 check_sblock (const struct SBlock *sb,
1754 GNUNET_HashCode *query,
1755 GNUNET_HashCode *namespace)
1757 if (dsize < sizeof (struct SBlock))
1759 GNUNET_break_op (0);
1760 return GNUNET_SYSERR;
1763 ntohl (sb->purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
1765 GNUNET_break_op (0);
1766 return GNUNET_SYSERR;
1769 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_SBLOCK,
1774 GNUNET_break_op (0);
1775 return GNUNET_SYSERR;
1778 *query = sb->identifier;
1779 if (namespace != NULL)
1780 GNUNET_CRYPTO_hash (&sb->subspace,
1781 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1788 * Transmit the given message by copying it to the target buffer
1789 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1790 * for writing in the meantime. In that case, do nothing
1791 * (the disconnect or shutdown handler will take care of the rest).
1792 * If we were able to transmit messages and there are still more
1793 * pending, ask core again for further calls to this function.
1795 * @param cls closure, pointer to the 'struct ClientList*'
1796 * @param size number of bytes available in buf
1797 * @param buf where the callee should write the message
1798 * @return number of bytes written to buf
1801 transmit_to_client (void *cls,
1802 size_t size, void *buf)
1804 struct ClientList *cl = cls;
1806 struct ClientResponseMessage *creply;
1813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1814 "Not sending reply, client communication problem.\n");
1819 while ( (NULL != (creply = cl->res_head) ) &&
1820 (creply->msize <= size) )
1822 memcpy (&cbuf[msize], &creply[1], creply->msize);
1823 msize += creply->msize;
1824 size -= creply->msize;
1825 GNUNET_CONTAINER_DLL_remove (cl->res_head,
1828 GNUNET_free (creply);
1831 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1833 GNUNET_TIME_UNIT_FOREVER_REL,
1834 &transmit_to_client,
1837 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1838 "Transmitted %u bytes to client\n",
1839 (unsigned int) msize);
1846 * Closure for "process_reply" function.
1848 struct ProcessReplyClosure
1851 * The data for the reply.
1855 // FIXME: add 'struct ConnectedPeer' to track 'last_xxx_replies' here!
1858 * When the reply expires.
1860 struct GNUNET_TIME_Absolute expiration;
1868 * Namespace that this reply belongs to
1869 * (if it is of type SBLOCK).
1871 GNUNET_HashCode namespace;
1874 * Type of the block.
1879 * How much was this reply worth to us?
1886 * We have received a reply; handle it!
1888 * @param cls response (struct ProcessReplyClosure)
1889 * @param key our query
1890 * @param value value in the hash map (info about the query)
1891 * @return GNUNET_YES (we should continue to iterate)
1894 process_reply (void *cls,
1895 const GNUNET_HashCode * key,
1898 struct ProcessReplyClosure *prq = cls;
1899 struct PendingRequest *pr = value;
1900 struct PendingMessage *reply;
1901 struct ClientResponseMessage *creply;
1902 struct ClientList *cl;
1903 struct PutMessage *pm;
1904 struct ConnectedPeer *cp;
1905 GNUNET_HashCode chash;
1906 GNUNET_HashCode mhash;
1910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1911 "Matched result (type %u) for query `%s' with pending request\n",
1912 (unsigned int) prq->type,
1915 GNUNET_STATISTICS_update (stats,
1916 gettext_noop ("# replies received and matched"),
1919 GNUNET_CRYPTO_hash (prq->data,
1924 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
1925 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
1926 /* only possible reply, stop requesting! */
1927 while (NULL != pr->pending_head)
1928 destroy_pending_message_list_entry (pr->pending_head);
1929 if (pr->drq != NULL)
1931 if (pr->client_request_list != NULL)
1932 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
1934 GNUNET_FS_drq_get_cancel (pr->drq);
1937 pr->do_remove = GNUNET_YES;
1938 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
1940 GNUNET_SCHEDULER_cancel (sched,
1942 pr->task = GNUNET_SCHEDULER_NO_TASK;
1944 GNUNET_break (GNUNET_YES ==
1945 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
1949 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
1950 if (pr->namespace == NULL)
1955 if (0 != memcmp (pr->namespace,
1957 sizeof (GNUNET_HashCode)))
1959 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1960 _("Reply mismatched in terms of namespace. Discarded.\n"));
1961 return GNUNET_YES; /* wrong namespace */
1963 /* then: fall-through! */
1964 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
1965 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
1968 mingle_hash (&chash, pr->mingle, &mhash);
1969 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (pr->bf,
1972 GNUNET_STATISTICS_update (stats,
1973 gettext_noop ("# duplicate replies discarded (bloomfilter)"),
1977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1978 "Duplicate response `%s', discarding.\n",
1979 GNUNET_h2s (&mhash));
1981 return GNUNET_YES; /* duplicate */
1984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1985 "New response `%s', adding to filter.\n",
1986 GNUNET_h2s (&mhash));
1988 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
1991 if (pr->client_request_list != NULL)
1993 if (pr->replies_seen_size == pr->replies_seen_off)
1995 GNUNET_array_grow (pr->replies_seen,
1996 pr->replies_seen_size,
1997 pr->replies_seen_size * 2 + 4);
1999 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2000 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2005 pr->replies_seen[pr->replies_seen_off++] = chash;
2012 prq->priority += pr->remaining_priority;
2013 pr->remaining_priority = 0;
2014 if (pr->client_request_list != NULL)
2017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2018 "Transmitting result for query `%s' to local client\n",
2021 GNUNET_STATISTICS_update (stats,
2022 gettext_noop ("# replies received for local clients"),
2025 cl = pr->client_request_list->client_list;
2026 msize = sizeof (struct PutMessage) + prq->size;
2027 creply = GNUNET_malloc (msize + sizeof (struct ClientResponseMessage));
2028 creply->msize = msize;
2029 creply->client_list = cl;
2030 GNUNET_CONTAINER_DLL_insert_after (cl->res_head,
2034 pm = (struct PutMessage*) &creply[1];
2035 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2036 pm->header.size = htons (msize);
2037 pm->type = htonl (prq->type);
2038 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
2039 memcpy (&pm[1], prq->data, prq->size);
2043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2044 "Transmitting result for query `%s' to client\n",
2047 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
2049 GNUNET_TIME_UNIT_FOREVER_REL,
2050 &transmit_to_client,
2053 GNUNET_break (cl->th != NULL);
2055 destroy_pending_request (pr);
2061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2062 "Transmitting result for query `%s' to other peer (PID=%u)\n",
2064 (unsigned int) cp->pid);
2066 GNUNET_STATISTICS_update (stats,
2067 gettext_noop ("# replies received for other peers"),
2070 msize = sizeof (struct PutMessage) + prq->size;
2071 reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
2072 reply->cont = &transmit_reply_continuation;
2073 reply->cont_cls = pr;
2074 reply->msize = msize;
2075 reply->priority = (uint32_t) -1; /* send replies first! */
2076 pm = (struct PutMessage*) &reply[1];
2077 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2078 pm->header.size = htons (msize);
2079 pm->type = htonl (prq->type);
2080 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
2081 memcpy (&pm[1], prq->data, prq->size);
2082 add_to_pending_messages_for_peer (cp, reply, pr);
2084 // FIXME: implement hot-path routing statistics keeping!
2090 * Handle P2P "PUT" message.
2092 * @param cls closure, always NULL
2093 * @param other the other peer involved (sender or receiver, NULL
2094 * for loopback messages where we are both sender and receiver)
2095 * @param message the actual message
2096 * @param latency reported latency of the connection with 'other'
2097 * @param distance reported distance (DV) to 'other'
2098 * @return GNUNET_OK to keep the connection open,
2099 * GNUNET_SYSERR to close it (signal serious error)
2102 handle_p2p_put (void *cls,
2103 const struct GNUNET_PeerIdentity *other,
2104 const struct GNUNET_MessageHeader *message,
2105 struct GNUNET_TIME_Relative latency,
2108 const struct PutMessage *put;
2112 struct GNUNET_TIME_Absolute expiration;
2113 GNUNET_HashCode query;
2114 struct ProcessReplyClosure prq;
2116 msize = ntohs (message->size);
2117 if (msize < sizeof (struct PutMessage))
2120 return GNUNET_SYSERR;
2122 put = (const struct PutMessage*) message;
2123 dsize = msize - sizeof (struct PutMessage);
2124 type = ntohl (put->type);
2125 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
2127 /* first, validate! */
2130 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2131 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2132 GNUNET_CRYPTO_hash (&put[1], dsize, &query);
2134 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2136 check_kblock ((const struct KBlock*) &put[1],
2139 return GNUNET_SYSERR;
2141 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2143 check_sblock ((const struct SBlock*) &put[1],
2147 return GNUNET_SYSERR;
2149 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2151 check_nblock ((const struct NBlock*) &put[1],
2154 return GNUNET_SYSERR;
2157 /* unknown block type */
2158 GNUNET_break_op (0);
2159 return GNUNET_SYSERR;
2163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2164 "Received result for query `%s' from peer `%4s'\n",
2165 GNUNET_h2s (&query),
2166 GNUNET_i2s (other));
2168 GNUNET_STATISTICS_update (stats,
2169 gettext_noop ("# replies received (overall)"),
2172 /* now, lookup 'query' */
2173 prq.data = (const void*) &put[1];
2176 prq.expiration = expiration;
2178 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2182 // FIXME: if migration is on and load is low,
2183 // queue to store data in datastore;
2184 // use "prq.priority" for that!
2189 /* **************************** P2P GET Handling ************************ */
2193 * Closure for 'check_duplicate_request_{peer,client}'.
2195 struct CheckDuplicateRequestClosure
2198 * The new request we should check if it already exists.
2200 const struct PendingRequest *pr;
2203 * Existing request found by the checker, NULL if none.
2205 struct PendingRequest *have;
2210 * Iterator over entries in the 'query_request_map' that
2211 * tries to see if we have the same request pending from
2212 * the same client already.
2214 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2215 * @param key current key code (query, ignored, must match)
2216 * @param value value in the hash map (a 'struct PendingRequest'
2217 * that already exists)
2218 * @return GNUNET_YES if we should continue to
2219 * iterate (no match yet)
2220 * GNUNET_NO if not (match found).
2223 check_duplicate_request_client (void *cls,
2224 const GNUNET_HashCode * key,
2227 struct CheckDuplicateRequestClosure *cdc = cls;
2228 struct PendingRequest *have = value;
2230 if (have->client_request_list == NULL)
2232 if ( (cdc->pr->client_request_list->client_list->client == have->client_request_list->client_list->client) &&
2243 * We're processing (local) results for a search request
2244 * from another peer. Pass applicable results to the
2245 * peer and if we are done either clean up (operation
2246 * complete) or forward to other peers (more results possible).
2248 * @param cls our closure (struct LocalGetContext)
2249 * @param key key for the content
2250 * @param size number of bytes in data
2251 * @param data content stored
2252 * @param type type of the content
2253 * @param priority priority of the content
2254 * @param anonymity anonymity-level for the content
2255 * @param expiration expiration time for the content
2256 * @param uid unique identifier for the datum;
2257 * maybe 0 if no unique identifier is available
2260 process_local_reply (void *cls,
2261 const GNUNET_HashCode * key,
2267 struct GNUNET_TIME_Absolute
2271 struct PendingRequest *pr = cls;
2272 struct ProcessReplyClosure prq;
2273 struct CheckDuplicateRequestClosure cdrc;
2274 GNUNET_HashCode dhash;
2275 GNUNET_HashCode mhash;
2276 GNUNET_HashCode query;
2281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2282 "Done processing local replies, forwarding request to other peers.\n");
2285 if (pr->client_request_list != NULL)
2287 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
2289 /* Figure out if this is a duplicate request and possibly
2290 merge 'struct PendingRequest' entries */
2293 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2295 &check_duplicate_request_client,
2297 if (cdrc.have != NULL)
2300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2301 "Received request for block `%s' twice from client, will only request once.\n",
2302 GNUNET_h2s (&pr->query));
2305 destroy_pending_request (pr);
2310 /* no more results */
2311 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2312 pr->task = GNUNET_SCHEDULER_add_now (sched,
2313 &forward_request_task,
2318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2319 "New local response to `%s' of type %u.\n",
2323 if (type == GNUNET_DATASTORE_BLOCKTYPE_ONDEMAND)
2326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2327 "Found ONDEMAND block, performing on-demand encoding\n");
2329 GNUNET_STATISTICS_update (stats,
2330 gettext_noop ("# on-demand blocks matched requests"),
2334 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
2335 anonymity, expiration, uid,
2336 &process_local_reply,
2338 GNUNET_FS_drq_get_next (GNUNET_YES);
2341 /* check for duplicates */
2342 GNUNET_CRYPTO_hash (data, size, &dhash);
2343 mingle_hash (&dhash,
2346 if ( (pr->bf != NULL) &&
2348 GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2353 "Result from datastore filtered by bloomfilter (duplicate).\n");
2355 GNUNET_STATISTICS_update (stats,
2356 gettext_noop ("# results filtered by query bloomfilter"),
2359 GNUNET_FS_drq_get_next (GNUNET_YES);
2363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2364 "Found result for query `%s' in local datastore\n",
2367 GNUNET_STATISTICS_update (stats,
2368 gettext_noop ("# results found locally"),
2371 pr->results_found++;
2372 if ( (pr->type == GNUNET_DATASTORE_BLOCKTYPE_KBLOCK) ||
2373 (pr->type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) ||
2374 (pr->type == GNUNET_DATASTORE_BLOCKTYPE_NBLOCK) )
2379 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
2384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2385 "New local response `%s', adding to filter.\n",
2386 GNUNET_h2s (&mhash));
2389 /* this would break stuff since we will check the bf later
2390 again (and would then discard the reply!) */
2391 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
2395 memset (&prq, 0, sizeof (prq));
2397 prq.expiration = expiration;
2399 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) &&
2400 (GNUNET_OK != check_sblock ((const struct SBlock*) data,
2406 /* FIXME: consider removing the block? */
2407 GNUNET_FS_drq_get_next (GNUNET_YES);
2411 prq.priority = priority;
2412 process_reply (&prq, key, pr);
2414 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK) ||
2415 (type == GNUNET_DATASTORE_BLOCKTYPE_IBLOCK) )
2417 GNUNET_FS_drq_get_next (GNUNET_NO);
2420 if ( (pr->client_request_list == NULL) &&
2421 ( (GNUNET_YES == test_load_too_high()) ||
2422 (pr->results_found > 5 + 2 * pr->priority) ) )
2425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2426 "Load too high, done with request\n");
2428 GNUNET_STATISTICS_update (stats,
2429 gettext_noop ("# processing result set cut short due to load"),
2432 GNUNET_FS_drq_get_next (GNUNET_NO);
2435 GNUNET_FS_drq_get_next (GNUNET_YES);
2440 * The priority level imposes a bound on the maximum
2441 * value for the ttl that can be requested.
2443 * @param ttl_in requested ttl
2444 * @param prio given priority
2445 * @return ttl_in if ttl_in is below the limit,
2446 * otherwise the ttl-limit for the given priority
2449 bound_ttl (int32_t ttl_in, uint32_t prio)
2451 unsigned long long allowed;
2455 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
2456 if (ttl_in > allowed)
2458 if (allowed >= (1 << 30))
2467 * We've received a request with the specified priority. Bound it
2468 * according to how much we trust the given peer.
2470 * @param prio_in requested priority
2471 * @param cp the peer making the request
2472 * @return effective priority
2475 bound_priority (uint32_t prio_in,
2476 struct ConnectedPeer *cp)
2483 * Iterator over entries in the 'query_request_map' that
2484 * tries to see if we have the same request pending from
2485 * the same peer already.
2487 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2488 * @param key current key code (query, ignored, must match)
2489 * @param value value in the hash map (a 'struct PendingRequest'
2490 * that already exists)
2491 * @return GNUNET_YES if we should continue to
2492 * iterate (no match yet)
2493 * GNUNET_NO if not (match found).
2496 check_duplicate_request_peer (void *cls,
2497 const GNUNET_HashCode * key,
2500 struct CheckDuplicateRequestClosure *cdc = cls;
2501 struct PendingRequest *have = value;
2503 if (cdc->pr->target_pid == have->target_pid)
2513 * Handle P2P "GET" request.
2515 * @param cls closure, always NULL
2516 * @param other the other peer involved (sender or receiver, NULL
2517 * for loopback messages where we are both sender and receiver)
2518 * @param message the actual message
2519 * @param latency reported latency of the connection with 'other'
2520 * @param distance reported distance (DV) to 'other'
2521 * @return GNUNET_OK to keep the connection open,
2522 * GNUNET_SYSERR to close it (signal serious error)
2525 handle_p2p_get (void *cls,
2526 const struct GNUNET_PeerIdentity *other,
2527 const struct GNUNET_MessageHeader *message,
2528 struct GNUNET_TIME_Relative latency,
2531 struct PendingRequest *pr;
2532 struct ConnectedPeer *cp;
2533 struct ConnectedPeer *cps;
2534 struct CheckDuplicateRequestClosure cdc;
2535 struct GNUNET_TIME_Relative timeout;
2537 const struct GetMessage *gm;
2539 const GNUNET_HashCode *opt;
2542 uint32_t ttl_decrement;
2547 msize = ntohs(message->size);
2548 if (msize < sizeof (struct GetMessage))
2550 GNUNET_break_op (0);
2551 return GNUNET_SYSERR;
2553 gm = (const struct GetMessage*) message;
2554 type = ntohl (gm->type);
2557 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
2558 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2559 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2560 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2561 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2564 GNUNET_break_op (0);
2565 return GNUNET_SYSERR;
2567 bm = ntohl (gm->hash_bitmap);
2575 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
2577 GNUNET_break_op (0);
2578 return GNUNET_SYSERR;
2580 opt = (const GNUNET_HashCode*) &gm[1];
2581 bfsize = msize - sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode);
2582 bm = ntohl (gm->hash_bitmap);
2583 if ( (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) &&
2584 (type != GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) )
2586 GNUNET_break_op (0);
2587 return GNUNET_SYSERR;
2590 cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2591 &other->hashPubKey);
2592 GNUNET_assert (NULL != cps);
2593 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2594 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2601 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2603 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
2604 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
2607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2608 "Failed to find peer `%4s' in connection set. Dropping query.\n",
2609 GNUNET_i2s (other));
2611 GNUNET_STATISTICS_update (stats,
2612 gettext_noop ("# requests dropped due to missing reverse route"),
2615 /* FIXME: try connect? */
2618 /* note that we can really only check load here since otherwise
2619 peers could find out that we are overloaded by not being
2620 disconnected after sending us a malformed query... */
2621 if (GNUNET_YES == test_load_too_high ())
2624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2625 "Dropping query from `%s', this peer is too busy.\n",
2626 GNUNET_i2s (other));
2628 GNUNET_STATISTICS_update (stats,
2629 gettext_noop ("# requests dropped due to high load"),
2636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2637 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
2638 GNUNET_h2s (&gm->query),
2639 (unsigned int) type,
2643 have_ns = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE));
2644 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2645 (have_ns ? sizeof(GNUNET_HashCode) : 0));
2647 pr->namespace = (GNUNET_HashCode*) &pr[1];
2649 pr->mingle = ntohl (gm->filter_mutator);
2650 if (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE))
2651 memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
2652 if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
2653 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
2655 pr->anonymity_level = 1;
2656 pr->priority = bound_priority (ntohl (gm->priority), cps);
2657 pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
2658 pr->query = gm->query;
2659 /* decrement ttl (always) */
2660 ttl_decrement = 2 * TTL_DECREMENT +
2661 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2663 if ( (pr->ttl < 0) &&
2664 (pr->ttl - ttl_decrement > 0) )
2667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2668 "Dropping query from `%s' due to TTL underflow.\n",
2669 GNUNET_i2s (other));
2671 GNUNET_STATISTICS_update (stats,
2672 gettext_noop ("# requests dropped due TTL underflow"),
2675 /* integer underflow => drop (should be very rare)! */
2679 pr->ttl -= ttl_decrement;
2680 pr->start_time = GNUNET_TIME_absolute_get ();
2682 /* get bloom filter */
2685 pr->bf = GNUNET_CONTAINER_bloomfilter_init ((const char*) &opt[bits],
2688 pr->bf_size = bfsize;
2693 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2695 &check_duplicate_request_peer,
2697 if (cdc.have != NULL)
2699 if (cdc.have->start_time.value + cdc.have->ttl >=
2700 pr->start_time.value + pr->ttl)
2702 /* existing request has higher TTL, drop new one! */
2703 cdc.have->priority += pr->priority;
2704 destroy_pending_request (pr);
2706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2707 "Have existing request with higher TTL, dropping new request.\n",
2708 GNUNET_i2s (other));
2710 GNUNET_STATISTICS_update (stats,
2711 gettext_noop ("# requests dropped due to existing request with higher TTL"),
2718 /* existing request has lower TTL, drop old one! */
2719 pr->priority += cdc.have->priority;
2720 /* Possible optimization: if we have applicable pending
2721 replies in 'cdc.have', we might want to move those over
2722 (this is a really rare special-case, so it is not clear
2723 that this would be worth it) */
2724 destroy_pending_request (cdc.have);
2725 /* keep processing 'pr'! */
2730 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2733 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2734 GNUNET_CONTAINER_multihashmap_put (peer_request_map,
2737 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2739 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
2741 pr->start_time.value + pr->ttl);
2743 GNUNET_STATISTICS_update (stats,
2744 gettext_noop ("# P2P searches active"),
2748 /* calculate change in traffic preference */
2749 preference = (double) pr->priority;
2750 if (preference < QUERY_BANDWIDTH_VALUE)
2751 preference = QUERY_BANDWIDTH_VALUE;
2752 cps->inc_preference += preference;
2754 /* process locally */
2755 if (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK)
2756 type = GNUNET_DATASTORE_BLOCKTYPE_ANY; /* to get on-demand as well */
2757 timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
2758 (pr->priority + 1));
2759 pr->drq = GNUNET_FS_drq_get (&gm->query,
2761 &process_local_reply,
2766 /* Are multiple results possible? If so, start processing remotely now! */
2769 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2770 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2771 /* only one result, wait for datastore */
2774 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2775 pr->task = GNUNET_SCHEDULER_add_now (sched,
2776 &forward_request_task,
2780 /* make sure we don't track too many requests */
2781 if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
2783 pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
2784 destroy_pending_request (pr);
2790 /* **************************** CS GET Handling ************************ */
2794 * Handle START_SEARCH-message (search request from client).
2796 * @param cls closure
2797 * @param client identification of the client
2798 * @param message the actual message
2801 handle_start_search (void *cls,
2802 struct GNUNET_SERVER_Client *client,
2803 const struct GNUNET_MessageHeader *message)
2805 static GNUNET_HashCode all_zeros;
2806 const struct SearchMessage *sm;
2807 struct ClientList *cl;
2808 struct ClientRequestList *crl;
2809 struct PendingRequest *pr;
2814 msize = ntohs (message->size);
2815 if ( (msize < sizeof (struct SearchMessage)) ||
2816 (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
2819 GNUNET_SERVER_receive_done (client,
2823 sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
2824 sm = (const struct SearchMessage*) message;
2827 while ( (cl != NULL) &&
2828 (cl->client != client) )
2832 cl = GNUNET_malloc (sizeof (struct ClientList));
2833 cl->client = client;
2834 GNUNET_SERVER_client_keep (client);
2835 cl->next = client_list;
2838 type = ntohl (sm->type);
2840 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2841 "Received request for `%s' of type %u from local client\n",
2842 GNUNET_h2s (&sm->query),
2843 (unsigned int) type);
2847 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
2848 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2849 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2850 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2851 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2852 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2856 GNUNET_SERVER_receive_done (client,
2861 /* detect duplicate KBLOCK requests */
2862 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_KBLOCK) ||
2863 (type == GNUNET_DATASTORE_BLOCKTYPE_NBLOCK) ||
2864 (type == GNUNET_DATASTORE_BLOCKTYPE_ANY) )
2867 while ( (crl != NULL) &&
2868 ( (0 != memcmp (&crl->req->query,
2870 sizeof (GNUNET_HashCode))) ||
2871 (crl->req->type != type) ) )
2876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2877 "Have existing request, merging content-seen lists.\n");
2880 /* Duplicate request (used to send long list of
2881 known/blocked results); merge 'pr->replies_seen'
2882 and update bloom filter */
2883 GNUNET_array_grow (pr->replies_seen,
2884 pr->replies_seen_size,
2885 pr->replies_seen_off + sc);
2886 memcpy (&pr->replies_seen[pr->replies_seen_off],
2888 sc * sizeof (GNUNET_HashCode));
2889 pr->replies_seen_off += sc;
2891 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2892 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2896 GNUNET_STATISTICS_update (stats,
2897 gettext_noop ("# client searches updated (merged content seen list)"),
2900 GNUNET_SERVER_receive_done (client,
2905 GNUNET_STATISTICS_update (stats,
2906 gettext_noop ("# client searches active"),
2909 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2910 ((type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK)?sizeof(GNUNET_HashCode):0));
2911 crl = GNUNET_malloc (sizeof (struct ClientRequestList));
2912 memset (crl, 0, sizeof (struct ClientRequestList));
2913 crl->client_list = cl;
2914 GNUNET_CONTAINER_DLL_insert (cl->rl_head,
2919 pr->client_request_list = crl;
2920 GNUNET_array_grow (pr->replies_seen,
2921 pr->replies_seen_size,
2923 memcpy (pr->replies_seen,
2925 sc * sizeof (GNUNET_HashCode));
2926 pr->replies_seen_off = sc;
2927 pr->anonymity_level = ntohl (sm->anonymity_level);
2928 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2932 pr->query = sm->query;
2935 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2936 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2937 if (0 != memcmp (&sm->target,
2939 sizeof (GNUNET_HashCode)))
2940 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
2942 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2943 pr->namespace = (GNUNET_HashCode*) &pr[1];
2944 memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
2949 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2952 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2953 if (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK)
2954 type = GNUNET_DATASTORE_BLOCKTYPE_ANY; /* get on-demand blocks too! */
2955 pr->drq = GNUNET_FS_drq_get (&sm->query,
2957 &process_local_reply,
2959 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
2964 /* **************************** Startup ************************ */
2968 * List of handlers for P2P messages
2969 * that we care about.
2971 static struct GNUNET_CORE_MessageHandler p2p_handlers[] =
2974 GNUNET_MESSAGE_TYPE_FS_GET, 0 },
2976 GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
2982 * List of handlers for the messages understood by this
2985 static struct GNUNET_SERVER_MessageHandler handlers[] = {
2986 {&GNUNET_FS_handle_index_start, NULL,
2987 GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
2988 {&GNUNET_FS_handle_index_list_get, NULL,
2989 GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
2990 {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
2991 sizeof (struct UnindexMessage) },
2992 {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
2999 * Process fs requests.
3001 * @param s scheduler to use
3002 * @param server the initialized server
3003 * @param c configuration to use
3006 main_init (struct GNUNET_SCHEDULER_Handle *s,
3007 struct GNUNET_SERVER_Handle *server,
3008 const struct GNUNET_CONFIGURATION_Handle *c)
3012 stats = GNUNET_STATISTICS_create (sched, "fs", cfg);
3013 connected_peers = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3014 query_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3015 peer_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3016 requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3017 core = GNUNET_CORE_connect (sched,
3019 GNUNET_TIME_UNIT_FOREVER_REL,
3023 &peer_connect_handler,
3024 &peer_disconnect_handler,
3030 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3031 _("Failed to connect to `%s' service.\n"),
3033 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
3034 connected_peers = NULL;
3035 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
3036 query_request_map = NULL;
3037 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
3038 requests_by_expiration_heap = NULL;
3039 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
3040 peer_request_map = NULL;
3042 return GNUNET_SYSERR;
3044 GNUNET_SERVER_disconnect_notify (server,
3045 &handle_client_disconnect,
3047 GNUNET_SERVER_add_handlers (server, handlers);
3048 GNUNET_SCHEDULER_add_delayed (sched,
3049 GNUNET_TIME_UNIT_FOREVER_REL,
3057 * Process fs requests.
3059 * @param cls closure
3060 * @param sched scheduler to use
3061 * @param server the initialized server
3062 * @param cfg configuration to use
3066 struct GNUNET_SCHEDULER_Handle *sched,
3067 struct GNUNET_SERVER_Handle *server,
3068 const struct GNUNET_CONFIGURATION_Handle *cfg)
3070 if ( (GNUNET_OK != GNUNET_FS_drq_init (sched, cfg)) ||
3071 (GNUNET_OK != GNUNET_FS_indexing_init (sched, cfg)) ||
3072 (GNUNET_OK != main_init (sched, server, cfg)) )
3074 GNUNET_SCHEDULER_shutdown (sched);
3081 * The main function for the fs service.
3083 * @param argc number of arguments from the command line
3084 * @param argv command line arguments
3085 * @return 0 ok, 1 on error
3088 main (int argc, char *const *argv)
3090 return (GNUNET_OK ==
3091 GNUNET_SERVICE_run (argc,
3094 GNUNET_SERVICE_OPTION_NONE,
3095 &run, NULL)) ? 0 : 1;
3098 /* end of gnunet-service-fs.c */