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3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
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22 * @file fs/gnunet-service-fs.c
23 * @brief gnunet anonymity protocol implementation
24 * @author Christian Grothoff
27 * - code not clear in terms of which function initializes bloomfilter when!
28 * - TTL/priority calculations are absent!
30 * - have non-zero preference / priority for requests we initiate!
31 * - track stats for hot-path routing
32 * - implement hot-path routing decision procedure
33 * - implement: bound_priority, test_load_too_high, validate_nblock
34 * - add content migration support (store locally) [or create new service]
39 #include "gnunet_constants.h"
40 #include "gnunet_core_service.h"
41 #include "gnunet_datastore_service.h"
42 #include "gnunet_peer_lib.h"
43 #include "gnunet_protocols.h"
44 #include "gnunet_signatures.h"
45 #include "gnunet_statistics_service.h"
46 #include "gnunet_util_lib.h"
47 #include "gnunet-service-fs_drq.h"
48 #include "gnunet-service-fs_indexing.h"
51 #define DEBUG_FS GNUNET_YES
54 * Maximum number of outgoing messages we queue per peer.
55 * FIXME: make configurable?
57 #define MAX_QUEUE_PER_PEER 16
60 * Inverse of the probability that we will submit the same query
61 * to the same peer again. If the same peer already got the query
62 * repeatedly recently, the probability is multiplied by the inverse
63 * of this number each time. Note that we only try about every TTL_DECREMENT/2
64 * plus MAX_CORK_DELAY (so roughly every 3.5s).
66 #define RETRY_PROBABILITY_INV 3
69 * What is the maximum delay for a P2P FS message (in our interaction
70 * with core)? FS-internal delays are another story. The value is
71 * chosen based on the 32k block size. Given that peers typcially
72 * have at least 1 kb/s bandwidth, 45s waits give us a chance to
73 * transmit one message even to the lowest-bandwidth peers.
75 #define MAX_TRANSMIT_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 45)
80 * Maximum number of requests (from other peers) that we're
81 * willing to have pending at any given point in time.
82 * FIXME: set from configuration.
84 static uint64_t max_pending_requests = (32 * 1024);
88 * Information we keep for each pending reply. The
89 * actual message follows at the end of this struct.
91 struct PendingMessage;
95 * Function called upon completion of a transmission.
98 * @param pid ID of receiving peer, 0 on transmission error
100 typedef void (*TransmissionContinuation)(void * cls,
101 GNUNET_PEER_Id tpid);
105 * Information we keep for each pending message (GET/PUT). The
106 * actual message follows at the end of this struct.
108 struct PendingMessage
111 * This is a doubly-linked list of messages to the same peer.
113 struct PendingMessage *next;
116 * This is a doubly-linked list of messages to the same peer.
118 struct PendingMessage *prev;
121 * Entry in pending message list for this pending message.
123 struct PendingMessageList *pml;
126 * Function to call immediately once we have transmitted this
129 TransmissionContinuation cont;
137 * Size of the reply; actual reply message follows
138 * at the end of this struct.
143 * How important is this message for us?
151 * Information about a peer that we are connected to.
152 * We track data that is useful for determining which
153 * peers should receive our requests. We also keep
154 * a list of messages to transmit to this peer.
160 * List of the last clients for which this peer successfully
163 struct GNUNET_SERVER_Client *last_client_replies[CS2P_SUCCESS_LIST_SIZE];
166 * List of the last PIDs for which
167 * this peer successfully answered a query;
168 * We use 0 to indicate no successful reply.
170 GNUNET_PEER_Id last_p2p_replies[P2P_SUCCESS_LIST_SIZE];
173 * Average delay between sending the peer a request and
174 * getting a reply (only calculated over the requests for
175 * which we actually got a reply). Calculated
176 * as a moving average: new_delay = ((n-1)*last_delay+curr_delay) / n
178 struct GNUNET_TIME_Relative avg_delay;
181 * Handle for an active request for transmission to this
184 struct GNUNET_CORE_TransmitHandle *cth;
187 * Messages (replies, queries, content migration) we would like to
188 * send to this peer in the near future. Sorted by priority, head.
190 struct PendingMessage *pending_messages_head;
193 * Messages (replies, queries, content migration) we would like to
194 * send to this peer in the near future. Sorted by priority, tail.
196 struct PendingMessage *pending_messages_tail;
199 * Average priority of successful replies. Calculated
200 * as a moving average: new_avg = ((n-1)*last_avg+curr_prio) / n
205 * Increase in traffic preference still to be submitted
206 * to the core service for this peer. FIXME: double or 'uint64_t'?
208 double inc_preference;
211 * The peer's identity.
216 * Size of the linked list of 'pending_messages'.
218 unsigned int pending_requests;
221 * Which offset in "last_p2p_replies" will be updated next?
222 * (we go round-robin).
224 unsigned int last_p2p_replies_woff;
227 * Which offset in "last_client_replies" will be updated next?
228 * (we go round-robin).
230 unsigned int last_client_replies_woff;
236 * Information we keep for each pending request. We should try to
237 * keep this struct as small as possible since its memory consumption
238 * is key to how many requests we can have pending at once.
240 struct PendingRequest;
244 * Doubly-linked list of requests we are performing
245 * on behalf of the same client.
247 struct ClientRequestList
251 * This is a doubly-linked list.
253 struct ClientRequestList *next;
256 * This is a doubly-linked list.
258 struct ClientRequestList *prev;
261 * Request this entry represents.
263 struct PendingRequest *req;
266 * Client list this request belongs to.
268 struct ClientList *client_list;
274 * Replies to be transmitted to the client. The actual
275 * response message is allocated after this struct.
277 struct ClientResponseMessage
280 * This is a doubly-linked list.
282 struct ClientResponseMessage *next;
285 * This is a doubly-linked list.
287 struct ClientResponseMessage *prev;
290 * Client list entry this response belongs to.
292 struct ClientList *client_list;
295 * Number of bytes in the response.
302 * Linked list of clients we are performing requests
308 * This is a linked list.
310 struct ClientList *next;
313 * ID of a client making a request, NULL if this entry is for a
316 struct GNUNET_SERVER_Client *client;
319 * Head of list of requests performed on behalf
320 * of this client right now.
322 struct ClientRequestList *rl_head;
325 * Tail of list of requests performed on behalf
326 * of this client right now.
328 struct ClientRequestList *rl_tail;
331 * Head of linked list of responses.
333 struct ClientResponseMessage *res_head;
336 * Tail of linked list of responses.
338 struct ClientResponseMessage *res_tail;
341 * Context for sending replies.
343 struct GNUNET_CONNECTION_TransmitHandle *th;
349 * Doubly-linked list of messages we are performing
350 * due to a pending request.
352 struct PendingMessageList
356 * This is a doubly-linked list of messages on behalf of the same request.
358 struct PendingMessageList *next;
361 * This is a doubly-linked list of messages on behalf of the same request.
363 struct PendingMessageList *prev;
366 * Message this entry represents.
368 struct PendingMessage *pm;
371 * Request this entry belongs to.
373 struct PendingRequest *req;
376 * Peer this message is targeted for.
378 struct ConnectedPeer *target;
384 * Information we keep for each pending request. We should try to
385 * keep this struct as small as possible since its memory consumption
386 * is key to how many requests we can have pending at once.
388 struct PendingRequest
392 * If this request was made by a client, this is our entry in the
393 * client request list; otherwise NULL.
395 struct ClientRequestList *client_request_list;
398 * Entry of peer responsible for this entry (if this request
399 * was made by a peer).
401 struct ConnectedPeer *cp;
404 * If this is a namespace query, pointer to the hash of the public
405 * key of the namespace; otherwise NULL. Pointer will be to the
406 * end of this struct (so no need to free it).
408 const GNUNET_HashCode *namespace;
411 * Bloomfilter we use to filter out replies that we don't care about
412 * (anymore). NULL as long as we are interested in all replies.
414 struct GNUNET_CONTAINER_BloomFilter *bf;
417 * Context of our GNUNET_CORE_peer_change_preference call.
419 struct GNUNET_CORE_InformationRequestContext *irc;
422 * Hash code of all replies that we have seen so far (only valid
423 * if client is not NULL since we only track replies like this for
426 GNUNET_HashCode *replies_seen;
429 * Node in the heap representing this entry; NULL
430 * if we have no heap node.
432 struct GNUNET_CONTAINER_HeapNode *hnode;
435 * Head of list of messages being performed on behalf of this
438 struct PendingMessageList *pending_head;
441 * Tail of list of messages being performed on behalf of this
444 struct PendingMessageList *pending_tail;
447 * When did we first see this request (form this peer), or, if our
448 * client is initiating, when did we last initiate a search?
450 struct GNUNET_TIME_Absolute start_time;
453 * The query that this request is for.
455 GNUNET_HashCode query;
458 * The task responsible for transmitting queries
461 GNUNET_SCHEDULER_TaskIdentifier task;
464 * (Interned) Peer identifier that identifies a preferred target
467 GNUNET_PEER_Id target_pid;
470 * (Interned) Peer identifiers of peers that have already
471 * received our query for this content.
473 GNUNET_PEER_Id *used_pids;
476 * Our entry in the DRQ (non-NULL while we wait for our
477 * turn to interact with the local database).
479 struct DatastoreRequestQueue *drq;
482 * Size of the 'bf' (in bytes).
487 * Desired anonymity level; only valid for requests from a local client.
489 uint32_t anonymity_level;
492 * How many entries in "used_pids" are actually valid?
494 unsigned int used_pids_off;
497 * How long is the "used_pids" array?
499 unsigned int used_pids_size;
502 * Number of results found for this request.
504 unsigned int results_found;
507 * How many entries in "replies_seen" are actually valid?
509 unsigned int replies_seen_off;
512 * How long is the "replies_seen" array?
514 unsigned int replies_seen_size;
517 * Priority with which this request was made. If one of our clients
518 * made the request, then this is the current priority that we are
519 * using when initiating the request. This value is used when
520 * we decide to reward other peers with trust for providing a reply.
525 * Priority points left for us to spend when forwarding this request
528 uint32_t remaining_priority;
531 * Number to mingle hashes for bloom-filter tests with.
536 * TTL with which we saw this request (or, if we initiated, TTL that
537 * we used for the request).
542 * Type of the content that this request is for.
547 * Remove this request after transmission of the current response.
557 static struct GNUNET_SCHEDULER_Handle *sched;
562 static const struct GNUNET_CONFIGURATION_Handle *cfg;
565 * Map of peer identifiers to "struct ConnectedPeer" (for that peer).
567 static struct GNUNET_CONTAINER_MultiHashMap *connected_peers;
570 * Map of peer identifiers to "struct PendingRequest" (for that peer).
572 static struct GNUNET_CONTAINER_MultiHashMap *peer_request_map;
575 * Map of query identifiers to "struct PendingRequest" (for that query).
577 static struct GNUNET_CONTAINER_MultiHashMap *query_request_map;
580 * Heap with the request that will expire next at the top. Contains
581 * pointers of type "struct PendingRequest*"; these will *also* be
582 * aliased from the "requests_by_peer" data structures and the
583 * "requests_by_query" table. Note that requests from our clients
584 * don't expire and are thus NOT in the "requests_by_expiration"
585 * (or the "requests_by_peer" tables).
587 static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
590 * Handle for reporting statistics.
592 static struct GNUNET_STATISTICS_Handle *stats;
595 * Linked list of clients we are currently processing requests for.
597 static struct ClientList *client_list;
600 * Pointer to handle to the core service (points to NULL until we've
603 static struct GNUNET_CORE_Handle *core;
606 /* ******************* clean up functions ************************ */
610 * We're done with a particular message list entry.
611 * Free all associated resources.
613 * @param pml entry to destroy
616 destroy_pending_message_list_entry (struct PendingMessageList *pml)
618 GNUNET_CONTAINER_DLL_remove (pml->req->pending_head,
619 pml->req->pending_tail,
621 GNUNET_CONTAINER_DLL_remove (pml->target->pending_messages_head,
622 pml->target->pending_messages_tail,
624 pml->target->pending_requests--;
625 GNUNET_free (pml->pm);
631 * Destroy the given pending message (and call the respective
634 * @param pm message to destroy
635 * @param tpid id of peer that the message was delivered to, or 0 for none
638 destroy_pending_message (struct PendingMessage *pm,
641 struct PendingMessageList *pml = pm->pml;
642 TransmissionContinuation cont;
645 GNUNET_assert (pml->pm == pm);
646 GNUNET_assert ( (tpid == 0) || (tpid == pml->target->pid) );
648 cont_cls = pm->cont_cls;
649 destroy_pending_message_list_entry (pml);
650 cont (cont_cls, tpid);
655 * We're done processing a particular request.
656 * Free all associated resources.
658 * @param pr request to destroy
661 destroy_pending_request (struct PendingRequest *pr)
663 struct GNUNET_PeerIdentity pid;
665 if (pr->hnode != NULL)
667 GNUNET_CONTAINER_heap_remove_node (requests_by_expiration_heap,
670 GNUNET_STATISTICS_update (stats,
671 gettext_noop ("# P2P searches active"),
677 GNUNET_STATISTICS_update (stats,
678 gettext_noop ("# client searches active"),
682 /* might have already been removed from map in 'process_reply' (if
683 there was a unique reply) or never inserted if it was a
684 duplicate; hence ignore the return value here */
685 (void) GNUNET_CONTAINER_multihashmap_remove (query_request_map,
690 GNUNET_FS_drq_get_cancel (pr->drq);
693 if (pr->client_request_list != NULL)
695 GNUNET_CONTAINER_DLL_remove (pr->client_request_list->client_list->rl_head,
696 pr->client_request_list->client_list->rl_tail,
697 pr->client_request_list);
698 GNUNET_free (pr->client_request_list);
699 pr->client_request_list = NULL;
703 GNUNET_PEER_resolve (pr->cp->pid,
705 (void) GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
712 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
717 GNUNET_CORE_peer_change_preference_cancel (pr->irc);
720 if (pr->replies_seen != NULL)
722 GNUNET_free (pr->replies_seen);
723 pr->replies_seen = NULL;
725 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
727 GNUNET_SCHEDULER_cancel (sched,
729 pr->task = GNUNET_SCHEDULER_NO_TASK;
731 while (NULL != pr->pending_head)
732 destroy_pending_message_list_entry (pr->pending_head);
733 GNUNET_PEER_change_rc (pr->target_pid, -1);
734 if (pr->used_pids != NULL)
736 GNUNET_PEER_decrement_rcs (pr->used_pids, pr->used_pids_off);
737 GNUNET_free (pr->used_pids);
738 pr->used_pids_off = 0;
739 pr->used_pids_size = 0;
740 pr->used_pids = NULL;
747 * Method called whenever a given peer connects.
749 * @param cls closure, not used
750 * @param peer peer identity this notification is about
751 * @param latency reported latency of the connection with 'other'
752 * @param distance reported distance (DV) to 'other'
755 peer_connect_handler (void *cls,
757 GNUNET_PeerIdentity * peer,
758 struct GNUNET_TIME_Relative latency,
761 struct ConnectedPeer *cp;
763 cp = GNUNET_malloc (sizeof (struct ConnectedPeer));
764 cp->pid = GNUNET_PEER_intern (peer);
765 GNUNET_CONTAINER_multihashmap_put (connected_peers,
768 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
773 * Free (each) request made by the peer.
775 * @param cls closure, points to peer that the request belongs to
776 * @param key current key code
777 * @param value value in the hash map
778 * @return GNUNET_YES (we should continue to iterate)
781 destroy_request (void *cls,
782 const GNUNET_HashCode * key,
785 const struct GNUNET_PeerIdentity * peer = cls;
786 struct PendingRequest *pr = value;
788 GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
791 destroy_pending_request (pr);
797 * Method called whenever a peer disconnects.
799 * @param cls closure, not used
800 * @param peer peer identity this notification is about
803 peer_disconnect_handler (void *cls,
805 GNUNET_PeerIdentity * peer)
807 struct ConnectedPeer *cp;
808 struct PendingMessage *pm;
811 GNUNET_CONTAINER_multihashmap_get_multiple (peer_request_map,
815 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
819 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
821 if (NULL != cp->last_client_replies[i])
823 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
824 cp->last_client_replies[i] = NULL;
827 GNUNET_CONTAINER_multihashmap_remove (connected_peers,
830 GNUNET_PEER_change_rc (cp->pid, -1);
831 GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
833 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
834 while (NULL != (pm = cp->pending_messages_head))
835 destroy_pending_message (pm, 0 /* delivery failed */);
836 GNUNET_break (0 == cp->pending_requests);
842 * Iterator over hash map entries that removes all occurences
843 * of the given 'client' from the 'last_client_replies' of the
844 * given connected peer.
846 * @param cls closure, the 'struct GNUNET_SERVER_Client*' to remove
847 * @param key current key code (unused)
848 * @param value value in the hash map (the 'struct ConnectedPeer*' to change)
849 * @return GNUNET_YES (we should continue to iterate)
852 remove_client_from_last_client_replies (void *cls,
853 const GNUNET_HashCode * key,
856 struct GNUNET_SERVER_Client *client = cls;
857 struct ConnectedPeer *cp = value;
860 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
862 if (cp->last_client_replies[i] == client)
864 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
865 cp->last_client_replies[i] = NULL;
873 * A client disconnected. Remove all of its pending queries.
875 * @param cls closure, NULL
876 * @param client identification of the client
879 handle_client_disconnect (void *cls,
880 struct GNUNET_SERVER_Client
883 struct ClientList *pos;
884 struct ClientList *prev;
885 struct ClientRequestList *rcl;
886 struct ClientResponseMessage *creply;
892 while ( (NULL != pos) &&
893 (pos->client != client) )
899 return; /* no requests pending for this client */
900 while (NULL != (rcl = pos->rl_head))
902 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
903 "Destroying pending request `%s' on disconnect\n",
904 GNUNET_h2s (&rcl->req->query));
905 destroy_pending_request (rcl->req);
908 client_list = pos->next;
910 prev->next = pos->next;
913 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
916 while (NULL != (creply = pos->res_head))
918 GNUNET_CONTAINER_DLL_remove (pos->res_head,
921 GNUNET_free (creply);
923 GNUNET_SERVER_client_drop (pos->client);
925 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
926 &remove_client_from_last_client_replies,
932 * Iterator to free peer entries.
934 * @param cls closure, unused
935 * @param key current key code
936 * @param value value in the hash map (peer entry)
937 * @return GNUNET_YES (we should continue to iterate)
940 clean_peer (void *cls,
941 const GNUNET_HashCode * key,
944 peer_disconnect_handler (NULL, (const struct GNUNET_PeerIdentity*) key);
950 * Task run during shutdown.
956 shutdown_task (void *cls,
957 const struct GNUNET_SCHEDULER_TaskContext *tc)
959 while (client_list != NULL)
960 handle_client_disconnect (NULL,
961 client_list->client);
962 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
965 GNUNET_break (0 == GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap));
966 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
967 requests_by_expiration_heap = 0;
968 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
969 connected_peers = NULL;
970 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
971 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
972 query_request_map = NULL;
973 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
974 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
975 peer_request_map = NULL;
976 GNUNET_assert (NULL != core);
977 GNUNET_CORE_disconnect (core);
981 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
989 /* ******************* Utility functions ******************** */
993 * Transmit the given message by copying it to the target buffer
994 * "buf". "buf" will be NULL and "size" zero if the socket was closed
995 * for writing in the meantime. In that case, do nothing
996 * (the disconnect or shutdown handler will take care of the rest).
997 * If we were able to transmit messages and there are still more
998 * pending, ask core again for further calls to this function.
1000 * @param cls closure, pointer to the 'struct ConnectedPeer*'
1001 * @param size number of bytes available in buf
1002 * @param buf where the callee should write the message
1003 * @return number of bytes written to buf
1006 transmit_to_peer (void *cls,
1007 size_t size, void *buf)
1009 struct ConnectedPeer *cp = cls;
1011 struct GNUNET_PeerIdentity pid;
1012 struct PendingMessage *pm;
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);
1031 destroy_pending_message (pm, cp->pid);
1035 GNUNET_PEER_resolve (cp->pid,
1037 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1039 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1047 "Transmitting %u bytes to peer %u.\n",
1056 * Add a message to the set of pending messages for the given peer.
1058 * @param cp peer to send message to
1059 * @param pm message to queue
1060 * @param pr request on which behalf this message is being queued
1063 add_to_pending_messages_for_peer (struct ConnectedPeer *cp,
1064 struct PendingMessage *pm,
1065 struct PendingRequest *pr)
1067 struct PendingMessage *pos;
1068 struct PendingMessageList *pml;
1069 struct GNUNET_PeerIdentity pid;
1071 GNUNET_assert (pm->next == NULL);
1072 GNUNET_assert (pm->pml == NULL);
1073 pml = GNUNET_malloc (sizeof (struct PendingMessageList));
1078 GNUNET_CONTAINER_DLL_insert (pr->pending_head,
1081 pos = cp->pending_messages_head;
1082 while ( (pos != NULL) &&
1083 (pm->priority < pos->priority) )
1085 GNUNET_CONTAINER_DLL_insert_after (cp->pending_messages_head,
1086 cp->pending_messages_tail,
1089 cp->pending_requests++;
1090 if (cp->pending_requests > MAX_QUEUE_PER_PEER)
1091 destroy_pending_message (cp->pending_messages_tail, 0);
1092 if (cp->cth == NULL)
1094 /* need to schedule transmission */
1095 GNUNET_PEER_resolve (cp->pid, &pid);
1096 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1097 cp->pending_messages_head->priority,
1100 cp->pending_messages_head->msize,
1104 if (cp->cth == NULL)
1107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1108 "Failed to schedule transmission with core!\n");
1110 /* FIXME: call stats (rare, bad case) */
1116 * Mingle hash with the mingle_number to produce different bits.
1119 mingle_hash (const GNUNET_HashCode * in,
1120 int32_t mingle_number,
1121 GNUNET_HashCode * hc)
1125 GNUNET_CRYPTO_hash (&mingle_number,
1128 GNUNET_CRYPTO_hash_xor (&m, in, hc);
1133 * Test if the load on this peer is too high
1134 * to even consider processing the query at
1137 * @return GNUNET_YES if the load is too high, GNUNET_NO otherwise
1140 test_load_too_high ()
1142 return GNUNET_NO; // FIXME
1146 /* ******************* Pending Request Refresh Task ******************** */
1151 * We use a random delay to make the timing of requests less
1152 * predictable. This function returns such a random delay. We add a base
1153 * delay of MAX_CORK_DELAY (1s).
1155 * FIXME: make schedule dependent on the specifics of the request?
1156 * Or bandwidth and number of connected peers and load?
1158 * @return random delay to use for some request, between 1s and 1000+TTL_DECREMENT ms
1160 static struct GNUNET_TIME_Relative
1161 get_processing_delay ()
1164 GNUNET_TIME_relative_add (GNUNET_CONSTANTS_MAX_CORK_DELAY,
1165 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1166 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1172 * We're processing a GET request from another peer and have decided
1173 * to forward it to other peers. This function is called periodically
1174 * and should forward the request to other peers until we have all
1175 * possible replies. If we have transmitted the *only* reply to
1176 * the initiator we should destroy the pending request. If we have
1177 * many replies in the queue to the initiator, we should delay sending
1178 * out more queries until the reply queue has shrunk some.
1180 * @param cls our "struct ProcessGetContext *"
1184 forward_request_task (void *cls,
1185 const struct GNUNET_SCHEDULER_TaskContext *tc);
1189 * Function called after we either failed or succeeded
1190 * at transmitting a query to a peer.
1192 * @param cls the requests "struct PendingRequest*"
1193 * @param tpid ID of receiving peer, 0 on transmission error
1196 transmit_query_continuation (void *cls,
1197 GNUNET_PEER_Id tpid)
1199 struct PendingRequest *pr = cls;
1201 GNUNET_STATISTICS_update (stats,
1202 gettext_noop ("# queries scheduled for forwarding"),
1208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1209 "Transmission of request failed, will try again later.\n");
1211 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1212 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1213 get_processing_delay (),
1214 &forward_request_task,
1218 GNUNET_STATISTICS_update (stats,
1219 gettext_noop ("# queries forwarded"),
1222 GNUNET_PEER_change_rc (tpid, 1);
1223 if (pr->used_pids_off == pr->used_pids_size)
1224 GNUNET_array_grow (pr->used_pids,
1226 pr->used_pids_size * 2 + 2);
1227 pr->used_pids[pr->used_pids_off++] = tpid;
1228 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1229 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1230 get_processing_delay (),
1231 &forward_request_task,
1237 * How many bytes should a bloomfilter be if we have already seen
1238 * entry_count responses? Note that BLOOMFILTER_K gives us the number
1239 * of bits set per entry. Furthermore, we should not re-size the
1240 * filter too often (to keep it cheap).
1242 * Since other peers will also add entries but not resize the filter,
1243 * we should generally pick a slightly larger size than what the
1244 * strict math would suggest.
1246 * @return must be a power of two and smaller or equal to 2^15.
1249 compute_bloomfilter_size (unsigned int entry_count)
1252 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
1253 uint16_t max = 1 << 15;
1255 if (entry_count > max)
1258 while ((size < max) && (size < ideal))
1267 * Recalculate our bloom filter for filtering replies.
1269 * @param count number of entries we are filtering right now
1270 * @param mingle set to our new mingling value
1271 * @param bf_size set to the size of the bloomfilter
1272 * @param entries the entries to filter
1273 * @return updated bloomfilter, NULL for none
1275 static struct GNUNET_CONTAINER_BloomFilter *
1276 refresh_bloomfilter (unsigned int count,
1279 const GNUNET_HashCode *entries)
1281 struct GNUNET_CONTAINER_BloomFilter *bf;
1284 GNUNET_HashCode mhash;
1288 nsize = compute_bloomfilter_size (count);
1289 *mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, -1);
1291 bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
1294 for (i=0;i<count;i++)
1296 mingle_hash (&entries[i], *mingle, &mhash);
1297 GNUNET_CONTAINER_bloomfilter_add (bf, &mhash);
1304 * Function called after we've tried to reserve a certain amount of
1305 * bandwidth for a reply. Check if we succeeded and if so send our
1308 * @param cls the requests "struct PendingRequest*"
1309 * @param peer identifies the peer
1310 * @param bpm_in set to the current bandwidth limit (receiving) for this peer
1311 * @param bpm_out set to the current bandwidth limit (sending) for this peer
1312 * @param amount set to the amount that was actually reserved or unreserved
1313 * @param preference current traffic preference for the given peer
1316 target_reservation_cb (void *cls,
1318 GNUNET_PeerIdentity * peer,
1319 struct GNUNET_BANDWIDTH_Value32NBO bpm_in,
1320 struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
1322 uint64_t preference)
1324 struct PendingRequest *pr = cls;
1325 struct ConnectedPeer *cp;
1326 struct PendingMessage *pm;
1327 struct GetMessage *gm;
1328 GNUNET_HashCode *ext;
1338 /* error in communication with core, try again later */
1339 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1340 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1341 get_processing_delay (),
1342 &forward_request_task,
1346 // (3) transmit, update ttl/priority
1347 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1351 /* Peer must have just left */
1353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1354 "Selected peer disconnected!\n");
1356 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1357 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1358 get_processing_delay (),
1359 &forward_request_task,
1363 no_route = GNUNET_NO;
1364 /* FIXME: check against DBLOCK_SIZE and possibly return
1365 amount to reserve; however, this also needs to work
1366 with testcases which currently start out with a far
1367 too low per-peer bw limit, so they would never send
1368 anything. Big issue. */
1374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1375 "Failed to reserve bandwidth for reply (got %d/%u bytes only)!\n",
1379 GNUNET_STATISTICS_update (stats,
1380 gettext_noop ("# reply bandwidth reservation requests failed"),
1383 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1384 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1385 get_processing_delay (),
1386 &forward_request_task,
1388 return; /* this target round failed */
1390 /* FIXME: if we are "quite" busy, we may still want to skip
1391 this round; need more load detection code! */
1392 no_route = GNUNET_YES;
1395 GNUNET_STATISTICS_update (stats,
1396 gettext_noop ("# queries scheduled for forwarding"),
1399 /* build message and insert message into priority queue */
1401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1402 "Forwarding request `%s' to `%4s'!\n",
1403 GNUNET_h2s (&pr->query),
1408 if (GNUNET_YES == no_route)
1410 bm |= GET_MESSAGE_BIT_RETURN_TO;
1413 if (pr->namespace != NULL)
1415 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
1418 if (pr->target_pid != 0)
1420 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
1423 msize = sizeof (struct GetMessage) + pr->bf_size + k * sizeof(GNUNET_HashCode);
1424 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1425 pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1427 gm = (struct GetMessage*) &pm[1];
1428 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
1429 gm->header.size = htons (msize);
1430 gm->type = htonl (pr->type);
1431 pr->remaining_priority /= 2;
1432 gm->priority = htonl (pr->remaining_priority);
1433 gm->ttl = htonl (pr->ttl);
1434 gm->filter_mutator = htonl(pr->mingle);
1435 gm->hash_bitmap = htonl (bm);
1436 gm->query = pr->query;
1437 ext = (GNUNET_HashCode*) &gm[1];
1439 if (GNUNET_YES == no_route)
1440 GNUNET_PEER_resolve (pr->cp->pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1441 if (pr->namespace != NULL)
1442 memcpy (&ext[k++], pr->namespace, sizeof (GNUNET_HashCode));
1443 if (pr->target_pid != 0)
1444 GNUNET_PEER_resolve (pr->target_pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1445 bfdata = (char *) &ext[k];
1447 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
1450 pm->cont = &transmit_query_continuation;
1452 add_to_pending_messages_for_peer (cp, pm, pr);
1457 * Closure used for "target_peer_select_cb".
1459 struct PeerSelectionContext
1462 * The request for which we are selecting
1465 struct PendingRequest *pr;
1468 * Current "prime" target.
1470 struct GNUNET_PeerIdentity target;
1473 * How much do we like this target?
1475 double target_score;
1481 * Function called for each connected peer to determine
1482 * which one(s) would make good targets for forwarding.
1484 * @param cls closure (struct PeerSelectionContext)
1485 * @param key current key code (peer identity)
1486 * @param value value in the hash map (struct ConnectedPeer)
1487 * @return GNUNET_YES if we should continue to
1492 target_peer_select_cb (void *cls,
1493 const GNUNET_HashCode * key,
1496 struct PeerSelectionContext *psc = cls;
1497 struct ConnectedPeer *cp = value;
1498 struct PendingRequest *pr = psc->pr;
1503 /* 1) check if we have already (recently) forwarded to this peer */
1505 for (i=0;i<pr->used_pids_off;i++)
1506 if (pr->used_pids[i] == cp->pid)
1509 if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1510 RETRY_PROBABILITY_INV))
1513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1514 "NOT re-trying query that was previously transmitted %u times\n",
1515 (unsigned int) pr->used_pids_off);
1517 return GNUNET_YES; /* skip */
1522 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1523 "Re-trying query that was previously transmitted %u times to this peer\n",
1526 // 2) calculate how much we'd like to forward to this peer
1527 score = 42; // FIXME!
1528 // FIXME: also need API to gather data on responsiveness
1529 // of this peer (we have fields for that in 'cp', but
1530 // they are never set!)
1532 /* store best-fit in closure */
1533 if (score > psc->target_score)
1535 psc->target_score = score;
1536 psc->target.hashPubKey = *key;
1543 * The priority level imposes a bound on the maximum
1544 * value for the ttl that can be requested.
1546 * @param ttl_in requested ttl
1547 * @param prio given priority
1548 * @return ttl_in if ttl_in is below the limit,
1549 * otherwise the ttl-limit for the given priority
1552 bound_ttl (int32_t ttl_in, uint32_t prio)
1554 unsigned long long allowed;
1558 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
1559 if (ttl_in > allowed)
1561 if (allowed >= (1 << 30))
1570 * We're processing a GET request from another peer and have decided
1571 * to forward it to other peers. This function is called periodically
1572 * and should forward the request to other peers until we have all
1573 * possible replies. If we have transmitted the *only* reply to
1574 * the initiator we should destroy the pending request. If we have
1575 * many replies in the queue to the initiator, we should delay sending
1576 * out more queries until the reply queue has shrunk some.
1578 * @param cls our "struct ProcessGetContext *"
1582 forward_request_task (void *cls,
1583 const struct GNUNET_SCHEDULER_TaskContext *tc)
1585 struct PendingRequest *pr = cls;
1586 struct PeerSelectionContext psc;
1587 struct ConnectedPeer *cp;
1588 struct GNUNET_TIME_Relative delay;
1590 pr->task = GNUNET_SCHEDULER_NO_TASK;
1591 if (pr->irc != NULL)
1594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1595 "Forwarding of query `%s' not attempted due to pending local lookup!\n",
1596 GNUNET_h2s (&pr->query));
1598 return; /* already pending */
1600 /* (1) select target */
1602 psc.target_score = DBL_MIN;
1603 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1604 &target_peer_select_cb,
1606 if (psc.target_score == DBL_MIN)
1608 delay = get_processing_delay ();
1610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1611 "No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
1612 GNUNET_h2s (&pr->query),
1615 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1617 &forward_request_task,
1619 return; /* nobody selected */
1621 /* (3) update TTL/priority */
1623 if (pr->client_request_list != NULL)
1625 /* FIXME: use better algorithm!? */
1626 if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1629 /* FIXME: bound priority by "customary" priority used by other peers
1631 pr->ttl = bound_ttl (pr->ttl + TTL_DECREMENT * 2,
1633 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1634 "Trying query `%s' with priority %u and TTL %d.\n",
1635 GNUNET_h2s (&pr->query),
1641 /* FIXME: should we do something here as well!? */
1644 /* (3) reserve reply bandwidth */
1645 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1646 &psc.target.hashPubKey);
1647 pr->irc = GNUNET_CORE_peer_change_preference (sched, cfg,
1649 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1650 GNUNET_BANDWIDTH_value_init ((uint32_t) -1 /* no limit */),
1652 (uint64_t) cp->inc_preference,
1653 &target_reservation_cb,
1655 cp->inc_preference = 0.0;
1659 /* **************************** P2P PUT Handling ************************ */
1663 * Function called after we either failed or succeeded
1664 * at transmitting a reply to a peer.
1666 * @param cls the requests "struct PendingRequest*"
1667 * @param tpid ID of receiving peer, 0 on transmission error
1670 transmit_reply_continuation (void *cls,
1671 GNUNET_PEER_Id tpid)
1673 struct PendingRequest *pr = cls;
1677 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
1678 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
1679 /* only one reply expected, done with the request! */
1680 destroy_pending_request (pr);
1682 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
1683 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
1684 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
1694 * Check if the given KBlock is well-formed.
1696 * @param kb the kblock data (or at least "dsize" bytes claiming to be one)
1697 * @param dsize size of "kb" in bytes; check for < sizeof(struct KBlock)!
1698 * @param query where to store the query that this block answers
1699 * @return GNUNET_OK if this is actually a well-formed KBlock
1702 check_kblock (const struct KBlock *kb,
1704 GNUNET_HashCode *query)
1706 if (dsize < sizeof (struct KBlock))
1708 GNUNET_break_op (0);
1709 return GNUNET_SYSERR;
1711 if (dsize - sizeof (struct KBlock) !=
1712 ntohl (kb->purpose.size)
1713 - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
1714 - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
1716 GNUNET_break_op (0);
1717 return GNUNET_SYSERR;
1720 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_KBLOCK,
1725 GNUNET_break_op (0);
1726 return GNUNET_SYSERR;
1729 GNUNET_CRYPTO_hash (&kb->keyspace,
1730 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1737 * Check if the given NBlock is well-formed.
1739 * @param nb the nblock data (or at least "dsize" bytes claiming to be one)
1740 * @param dsize size of "nb" in bytes; check for < sizeof(struct NBlock)!
1741 * @param query where to store the query that this block answers
1742 * @return GNUNET_OK if this is actually a well-formed NBlock
1745 check_nblock (const struct NBlock *nb,
1747 GNUNET_HashCode *query)
1749 if (dsize < sizeof (struct NBlock))
1751 GNUNET_break_op (0);
1752 return GNUNET_SYSERR;
1754 if (dsize - sizeof (struct NBlock) !=
1755 ntohl (nb->ns_purpose.size)
1756 - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
1757 - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
1759 GNUNET_break_op (0);
1760 return GNUNET_SYSERR;
1763 ntohl (nb->ksk_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_NBLOCK_KSIG,
1774 GNUNET_break_op (0);
1775 return GNUNET_SYSERR;
1778 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK,
1783 GNUNET_break_op (0);
1784 return GNUNET_SYSERR;
1787 GNUNET_CRYPTO_hash (&nb->keyspace,
1788 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1795 * Check if the given SBlock is well-formed.
1797 * @param sb the sblock data (or at least "dsize" bytes claiming to be one)
1798 * @param dsize size of "kb" in bytes; check for < sizeof(struct SBlock)!
1799 * @param query where to store the query that this block answers
1800 * @param namespace where to store the namespace that this block belongs to
1801 * @return GNUNET_OK if this is actually a well-formed SBlock
1804 check_sblock (const struct SBlock *sb,
1806 GNUNET_HashCode *query,
1807 GNUNET_HashCode *namespace)
1809 if (dsize < sizeof (struct SBlock))
1811 GNUNET_break_op (0);
1812 return GNUNET_SYSERR;
1815 ntohl (sb->purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
1817 GNUNET_break_op (0);
1818 return GNUNET_SYSERR;
1821 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_SBLOCK,
1826 GNUNET_break_op (0);
1827 return GNUNET_SYSERR;
1830 *query = sb->identifier;
1831 if (namespace != NULL)
1832 GNUNET_CRYPTO_hash (&sb->subspace,
1833 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1840 * Transmit the given message by copying it to the target buffer
1841 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1842 * for writing in the meantime. In that case, do nothing
1843 * (the disconnect or shutdown handler will take care of the rest).
1844 * If we were able to transmit messages and there are still more
1845 * pending, ask core again for further calls to this function.
1847 * @param cls closure, pointer to the 'struct ClientList*'
1848 * @param size number of bytes available in buf
1849 * @param buf where the callee should write the message
1850 * @return number of bytes written to buf
1853 transmit_to_client (void *cls,
1854 size_t size, void *buf)
1856 struct ClientList *cl = cls;
1858 struct ClientResponseMessage *creply;
1865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1866 "Not sending reply, client communication problem.\n");
1871 while ( (NULL != (creply = cl->res_head) ) &&
1872 (creply->msize <= size) )
1874 memcpy (&cbuf[msize], &creply[1], creply->msize);
1875 msize += creply->msize;
1876 size -= creply->msize;
1877 GNUNET_CONTAINER_DLL_remove (cl->res_head,
1880 GNUNET_free (creply);
1883 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1885 GNUNET_TIME_UNIT_FOREVER_REL,
1886 &transmit_to_client,
1889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1890 "Transmitted %u bytes to client\n",
1891 (unsigned int) msize);
1898 * Closure for "process_reply" function.
1900 struct ProcessReplyClosure
1903 * The data for the reply.
1907 // FIXME: add 'struct ConnectedPeer' to track 'last_xxx_replies' here!
1910 * When the reply expires.
1912 struct GNUNET_TIME_Absolute expiration;
1920 * Namespace that this reply belongs to
1921 * (if it is of type SBLOCK).
1923 GNUNET_HashCode namespace;
1926 * Type of the block.
1931 * How much was this reply worth to us?
1938 * We have received a reply; handle it!
1940 * @param cls response (struct ProcessReplyClosure)
1941 * @param key our query
1942 * @param value value in the hash map (info about the query)
1943 * @return GNUNET_YES (we should continue to iterate)
1946 process_reply (void *cls,
1947 const GNUNET_HashCode * key,
1950 struct ProcessReplyClosure *prq = cls;
1951 struct PendingRequest *pr = value;
1952 struct PendingMessage *reply;
1953 struct ClientResponseMessage *creply;
1954 struct ClientList *cl;
1955 struct PutMessage *pm;
1956 struct ConnectedPeer *cp;
1957 GNUNET_HashCode chash;
1958 GNUNET_HashCode mhash;
1962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1963 "Matched result (type %u) for query `%s' with pending request\n",
1964 (unsigned int) prq->type,
1967 GNUNET_STATISTICS_update (stats,
1968 gettext_noop ("# replies received and matched"),
1971 GNUNET_CRYPTO_hash (prq->data,
1976 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
1977 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
1978 /* only possible reply, stop requesting! */
1979 while (NULL != pr->pending_head)
1980 destroy_pending_message_list_entry (pr->pending_head);
1981 if (pr->drq != NULL)
1983 if (pr->client_request_list != NULL)
1984 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
1986 GNUNET_FS_drq_get_cancel (pr->drq);
1989 pr->do_remove = GNUNET_YES;
1990 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
1992 GNUNET_SCHEDULER_cancel (sched,
1994 pr->task = GNUNET_SCHEDULER_NO_TASK;
1996 GNUNET_break (GNUNET_YES ==
1997 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
2001 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2002 if (pr->namespace == NULL)
2007 if (0 != memcmp (pr->namespace,
2009 sizeof (GNUNET_HashCode)))
2011 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2012 _("Reply mismatched in terms of namespace. Discarded.\n"));
2013 return GNUNET_YES; /* wrong namespace */
2015 /* then: fall-through! */
2016 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2017 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2020 mingle_hash (&chash, pr->mingle, &mhash);
2021 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2024 GNUNET_STATISTICS_update (stats,
2025 gettext_noop ("# duplicate replies discarded (bloomfilter)"),
2029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2030 "Duplicate response `%s', discarding.\n",
2031 GNUNET_h2s (&mhash));
2033 return GNUNET_YES; /* duplicate */
2036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2037 "New response `%s', adding to filter.\n",
2038 GNUNET_h2s (&mhash));
2040 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
2043 if (pr->client_request_list != NULL)
2045 if (pr->replies_seen_size == pr->replies_seen_off)
2047 GNUNET_array_grow (pr->replies_seen,
2048 pr->replies_seen_size,
2049 pr->replies_seen_size * 2 + 4);
2051 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2052 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2057 pr->replies_seen[pr->replies_seen_off++] = chash;
2064 prq->priority += pr->remaining_priority;
2065 pr->remaining_priority = 0;
2066 if (pr->client_request_list != NULL)
2068 GNUNET_STATISTICS_update (stats,
2069 gettext_noop ("# replies received for local clients"),
2072 cl = pr->client_request_list->client_list;
2073 msize = sizeof (struct PutMessage) + prq->size;
2074 creply = GNUNET_malloc (msize + sizeof (struct ClientResponseMessage));
2075 creply->msize = msize;
2076 creply->client_list = cl;
2077 GNUNET_CONTAINER_DLL_insert_after (cl->res_head,
2081 pm = (struct PutMessage*) &creply[1];
2082 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2083 pm->header.size = htons (msize);
2084 pm->type = htonl (prq->type);
2085 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
2086 memcpy (&pm[1], prq->data, prq->size);
2090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2091 "Transmitting result for query `%s' to client\n",
2094 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
2096 GNUNET_TIME_UNIT_FOREVER_REL,
2097 &transmit_to_client,
2100 GNUNET_break (cl->th != NULL);
2102 destroy_pending_request (pr);
2108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2109 "Transmitting result for query `%s' to other peer (PID=%u)\n",
2111 (unsigned int) cp->pid);
2113 GNUNET_STATISTICS_update (stats,
2114 gettext_noop ("# replies received for other peers"),
2117 msize = sizeof (struct PutMessage) + prq->size;
2118 reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
2119 reply->cont = &transmit_reply_continuation;
2120 reply->cont_cls = pr;
2121 reply->msize = msize;
2122 reply->priority = (uint32_t) -1; /* send replies first! */
2123 pm = (struct PutMessage*) &reply[1];
2124 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2125 pm->header.size = htons (msize);
2126 pm->type = htonl (prq->type);
2127 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
2128 memcpy (&pm[1], prq->data, prq->size);
2129 add_to_pending_messages_for_peer (cp, reply, pr);
2131 // FIXME: implement hot-path routing statistics keeping!
2137 * Handle P2P "PUT" message.
2139 * @param cls closure, always NULL
2140 * @param other the other peer involved (sender or receiver, NULL
2141 * for loopback messages where we are both sender and receiver)
2142 * @param message the actual message
2143 * @param latency reported latency of the connection with 'other'
2144 * @param distance reported distance (DV) to 'other'
2145 * @return GNUNET_OK to keep the connection open,
2146 * GNUNET_SYSERR to close it (signal serious error)
2149 handle_p2p_put (void *cls,
2150 const struct GNUNET_PeerIdentity *other,
2151 const struct GNUNET_MessageHeader *message,
2152 struct GNUNET_TIME_Relative latency,
2155 const struct PutMessage *put;
2159 struct GNUNET_TIME_Absolute expiration;
2160 GNUNET_HashCode query;
2161 struct ProcessReplyClosure prq;
2163 msize = ntohs (message->size);
2164 if (msize < sizeof (struct PutMessage))
2167 return GNUNET_SYSERR;
2169 put = (const struct PutMessage*) message;
2170 dsize = msize - sizeof (struct PutMessage);
2171 type = ntohl (put->type);
2172 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
2174 /* first, validate! */
2177 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2178 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2179 GNUNET_CRYPTO_hash (&put[1], dsize, &query);
2181 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2183 check_kblock ((const struct KBlock*) &put[1],
2186 return GNUNET_SYSERR;
2188 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2190 check_sblock ((const struct SBlock*) &put[1],
2194 return GNUNET_SYSERR;
2196 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2198 check_nblock ((const struct NBlock*) &put[1],
2201 return GNUNET_SYSERR;
2204 /* unknown block type */
2205 GNUNET_break_op (0);
2206 return GNUNET_SYSERR;
2210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2211 "Received result for query `%s' from peer `%4s'\n",
2212 GNUNET_h2s (&query),
2213 GNUNET_i2s (other));
2215 GNUNET_STATISTICS_update (stats,
2216 gettext_noop ("# replies received (overall)"),
2219 /* now, lookup 'query' */
2220 prq.data = (const void*) &put[1];
2223 prq.expiration = expiration;
2225 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2229 // FIXME: if migration is on and load is low,
2230 // queue to store data in datastore;
2231 // use "prq.priority" for that!
2236 /* **************************** P2P GET Handling ************************ */
2240 * Closure for 'check_duplicate_request_{peer,client}'.
2242 struct CheckDuplicateRequestClosure
2245 * The new request we should check if it already exists.
2247 const struct PendingRequest *pr;
2250 * Existing request found by the checker, NULL if none.
2252 struct PendingRequest *have;
2257 * Iterator over entries in the 'query_request_map' that
2258 * tries to see if we have the same request pending from
2259 * the same client already.
2261 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2262 * @param key current key code (query, ignored, must match)
2263 * @param value value in the hash map (a 'struct PendingRequest'
2264 * that already exists)
2265 * @return GNUNET_YES if we should continue to
2266 * iterate (no match yet)
2267 * GNUNET_NO if not (match found).
2270 check_duplicate_request_client (void *cls,
2271 const GNUNET_HashCode * key,
2274 struct CheckDuplicateRequestClosure *cdc = cls;
2275 struct PendingRequest *have = value;
2277 if (have->client_request_list == NULL)
2279 if ( (cdc->pr->client_request_list->client_list->client == have->client_request_list->client_list->client) &&
2290 * We're processing (local) results for a search request
2291 * from another peer. Pass applicable results to the
2292 * peer and if we are done either clean up (operation
2293 * complete) or forward to other peers (more results possible).
2295 * @param cls our closure (struct LocalGetContext)
2296 * @param key key for the content
2297 * @param size number of bytes in data
2298 * @param data content stored
2299 * @param type type of the content
2300 * @param priority priority of the content
2301 * @param anonymity anonymity-level for the content
2302 * @param expiration expiration time for the content
2303 * @param uid unique identifier for the datum;
2304 * maybe 0 if no unique identifier is available
2307 process_local_reply (void *cls,
2308 const GNUNET_HashCode * key,
2314 struct GNUNET_TIME_Absolute
2318 struct PendingRequest *pr = cls;
2319 struct ProcessReplyClosure prq;
2320 struct CheckDuplicateRequestClosure cdrc;
2321 GNUNET_HashCode dhash;
2322 GNUNET_HashCode mhash;
2323 GNUNET_HashCode query;
2328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2329 "Done processing local replies, forwarding request to other peers.\n");
2332 if (pr->client_request_list != NULL)
2334 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
2336 /* Figure out if this is a duplicate request and possibly
2337 merge 'struct PendingRequest' entries */
2340 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2342 &check_duplicate_request_client,
2344 if (cdrc.have != NULL)
2347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2348 "Received request for block `%s' twice from client, will only request once.\n",
2349 GNUNET_h2s (&pr->query));
2352 destroy_pending_request (pr);
2357 /* no more results */
2358 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2359 pr->task = GNUNET_SCHEDULER_add_now (sched,
2360 &forward_request_task,
2365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2366 "New local response to `%s' of type %u.\n",
2370 if (type == GNUNET_DATASTORE_BLOCKTYPE_ONDEMAND)
2373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2374 "Found ONDEMAND block, performing on-demand encoding\n");
2376 GNUNET_STATISTICS_update (stats,
2377 gettext_noop ("# on-demand blocks matched requests"),
2381 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
2382 anonymity, expiration, uid,
2383 &process_local_reply,
2385 GNUNET_FS_drq_get_next (GNUNET_YES);
2388 /* check for duplicates */
2389 GNUNET_CRYPTO_hash (data, size, &dhash);
2390 mingle_hash (&dhash,
2393 if ( (pr->bf != NULL) &&
2395 GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2400 "Result from datastore filtered by bloomfilter (duplicate).\n");
2402 GNUNET_STATISTICS_update (stats,
2403 gettext_noop ("# results filtered by query bloomfilter"),
2406 GNUNET_FS_drq_get_next (GNUNET_YES);
2410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2411 "Found result for query `%s' in local datastore\n",
2414 GNUNET_STATISTICS_update (stats,
2415 gettext_noop ("# results found locally"),
2418 pr->results_found++;
2419 if ( (pr->type == GNUNET_DATASTORE_BLOCKTYPE_KBLOCK) ||
2420 (pr->type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) ||
2421 (pr->type == GNUNET_DATASTORE_BLOCKTYPE_NBLOCK) )
2426 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
2431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2432 "New local response `%s', adding to filter.\n",
2433 GNUNET_h2s (&mhash));
2436 /* this would break stuff since we will check the bf later
2437 again (and would then discard the reply!) */
2438 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
2442 memset (&prq, 0, sizeof (prq));
2444 prq.expiration = expiration;
2446 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) &&
2447 (GNUNET_OK != check_sblock ((const struct SBlock*) data,
2453 /* FIXME: consider removing the block? */
2454 GNUNET_FS_drq_get_next (GNUNET_YES);
2458 prq.priority = priority;
2459 process_reply (&prq, key, pr);
2461 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK) ||
2462 (type == GNUNET_DATASTORE_BLOCKTYPE_IBLOCK) )
2464 GNUNET_FS_drq_get_next (GNUNET_NO);
2467 if ( (pr->client_request_list == NULL) &&
2468 ( (GNUNET_YES == test_load_too_high()) ||
2469 (pr->results_found > 5 + 2 * pr->priority) ) )
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2473 "Load too high, done with request\n");
2475 GNUNET_STATISTICS_update (stats,
2476 gettext_noop ("# processing result set cut short due to load"),
2479 GNUNET_FS_drq_get_next (GNUNET_NO);
2482 GNUNET_FS_drq_get_next (GNUNET_YES);
2487 * We've received a request with the specified priority. Bound it
2488 * according to how much we trust the given peer.
2490 * @param prio_in requested priority
2491 * @param cp the peer making the request
2492 * @return effective priority
2495 bound_priority (uint32_t prio_in,
2496 struct ConnectedPeer *cp)
2503 * Iterator over entries in the 'query_request_map' that
2504 * tries to see if we have the same request pending from
2505 * the same peer already.
2507 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2508 * @param key current key code (query, ignored, must match)
2509 * @param value value in the hash map (a 'struct PendingRequest'
2510 * that already exists)
2511 * @return GNUNET_YES if we should continue to
2512 * iterate (no match yet)
2513 * GNUNET_NO if not (match found).
2516 check_duplicate_request_peer (void *cls,
2517 const GNUNET_HashCode * key,
2520 struct CheckDuplicateRequestClosure *cdc = cls;
2521 struct PendingRequest *have = value;
2523 if (cdc->pr->target_pid == have->target_pid)
2533 * Handle P2P "GET" request.
2535 * @param cls closure, always NULL
2536 * @param other the other peer involved (sender or receiver, NULL
2537 * for loopback messages where we are both sender and receiver)
2538 * @param message the actual message
2539 * @param latency reported latency of the connection with 'other'
2540 * @param distance reported distance (DV) to 'other'
2541 * @return GNUNET_OK to keep the connection open,
2542 * GNUNET_SYSERR to close it (signal serious error)
2545 handle_p2p_get (void *cls,
2546 const struct GNUNET_PeerIdentity *other,
2547 const struct GNUNET_MessageHeader *message,
2548 struct GNUNET_TIME_Relative latency,
2551 struct PendingRequest *pr;
2552 struct ConnectedPeer *cp;
2553 struct ConnectedPeer *cps;
2554 struct CheckDuplicateRequestClosure cdc;
2555 struct GNUNET_TIME_Relative timeout;
2557 const struct GetMessage *gm;
2559 const GNUNET_HashCode *opt;
2562 uint32_t ttl_decrement;
2567 msize = ntohs(message->size);
2568 if (msize < sizeof (struct GetMessage))
2570 GNUNET_break_op (0);
2571 return GNUNET_SYSERR;
2573 gm = (const struct GetMessage*) message;
2574 type = ntohl (gm->type);
2577 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
2578 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2579 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2580 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2581 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2584 GNUNET_break_op (0);
2585 return GNUNET_SYSERR;
2587 bm = ntohl (gm->hash_bitmap);
2595 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
2597 GNUNET_break_op (0);
2598 return GNUNET_SYSERR;
2600 opt = (const GNUNET_HashCode*) &gm[1];
2601 bfsize = msize - sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode);
2602 bm = ntohl (gm->hash_bitmap);
2603 if ( (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) &&
2604 (type != GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) )
2606 GNUNET_break_op (0);
2607 return GNUNET_SYSERR;
2610 cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2611 &other->hashPubKey);
2614 /* peer must have just disconnected */
2615 GNUNET_STATISTICS_update (stats,
2616 gettext_noop ("# requests dropped due to initiator not being connected"),
2619 return GNUNET_SYSERR;
2621 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2622 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2629 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2631 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
2632 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
2635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2636 "Failed to find peer `%4s' in connection set. Dropping query.\n",
2637 GNUNET_i2s (other));
2639 GNUNET_STATISTICS_update (stats,
2640 gettext_noop ("# requests dropped due to missing reverse route"),
2643 /* FIXME: try connect? */
2646 /* note that we can really only check load here since otherwise
2647 peers could find out that we are overloaded by not being
2648 disconnected after sending us a malformed query... */
2649 if (GNUNET_YES == test_load_too_high ())
2652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2653 "Dropping query from `%s', this peer is too busy.\n",
2654 GNUNET_i2s (other));
2656 GNUNET_STATISTICS_update (stats,
2657 gettext_noop ("# requests dropped due to high load"),
2664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2665 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
2666 GNUNET_h2s (&gm->query),
2667 (unsigned int) type,
2671 have_ns = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE));
2672 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2673 (have_ns ? sizeof(GNUNET_HashCode) : 0));
2675 pr->namespace = (GNUNET_HashCode*) &pr[1];
2677 pr->mingle = ntohl (gm->filter_mutator);
2678 if (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE))
2679 memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
2680 if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
2681 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
2683 pr->anonymity_level = 1;
2684 pr->priority = bound_priority (ntohl (gm->priority), cps);
2685 pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
2686 pr->query = gm->query;
2687 /* decrement ttl (always) */
2688 ttl_decrement = 2 * TTL_DECREMENT +
2689 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2691 if ( (pr->ttl < 0) &&
2692 (((int32_t)(pr->ttl - ttl_decrement)) > 0) )
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2696 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
2701 GNUNET_STATISTICS_update (stats,
2702 gettext_noop ("# requests dropped due TTL underflow"),
2705 /* integer underflow => drop (should be very rare)! */
2709 pr->ttl -= ttl_decrement;
2710 pr->start_time = GNUNET_TIME_absolute_get ();
2712 /* get bloom filter */
2715 pr->bf = GNUNET_CONTAINER_bloomfilter_init ((const char*) &opt[bits],
2718 pr->bf_size = bfsize;
2723 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2725 &check_duplicate_request_peer,
2727 if (cdc.have != NULL)
2729 if (cdc.have->start_time.value + cdc.have->ttl >=
2730 pr->start_time.value + pr->ttl)
2732 /* existing request has higher TTL, drop new one! */
2733 cdc.have->priority += pr->priority;
2734 destroy_pending_request (pr);
2736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2737 "Have existing request with higher TTL, dropping new request.\n",
2738 GNUNET_i2s (other));
2740 GNUNET_STATISTICS_update (stats,
2741 gettext_noop ("# requests dropped due to existing request with higher TTL"),
2748 /* existing request has lower TTL, drop old one! */
2749 pr->priority += cdc.have->priority;
2750 /* Possible optimization: if we have applicable pending
2751 replies in 'cdc.have', we might want to move those over
2752 (this is a really rare special-case, so it is not clear
2753 that this would be worth it) */
2754 destroy_pending_request (cdc.have);
2755 /* keep processing 'pr'! */
2760 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2763 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2764 GNUNET_CONTAINER_multihashmap_put (peer_request_map,
2767 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2769 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
2771 pr->start_time.value + pr->ttl);
2773 GNUNET_STATISTICS_update (stats,
2774 gettext_noop ("# P2P searches received"),
2777 GNUNET_STATISTICS_update (stats,
2778 gettext_noop ("# P2P searches active"),
2782 /* calculate change in traffic preference */
2783 preference = (double) pr->priority;
2784 if (preference < QUERY_BANDWIDTH_VALUE)
2785 preference = QUERY_BANDWIDTH_VALUE;
2786 cps->inc_preference += preference;
2788 /* process locally */
2789 if (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK)
2790 type = GNUNET_DATASTORE_BLOCKTYPE_ANY; /* to get on-demand as well */
2791 timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
2792 (pr->priority + 1));
2793 pr->drq = GNUNET_FS_drq_get (&gm->query,
2795 &process_local_reply,
2800 /* Are multiple results possible? If so, start processing remotely now! */
2803 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2804 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2805 /* only one result, wait for datastore */
2808 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2809 pr->task = GNUNET_SCHEDULER_add_now (sched,
2810 &forward_request_task,
2814 /* make sure we don't track too many requests */
2815 if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
2817 pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
2818 destroy_pending_request (pr);
2824 /* **************************** CS GET Handling ************************ */
2828 * Handle START_SEARCH-message (search request from client).
2830 * @param cls closure
2831 * @param client identification of the client
2832 * @param message the actual message
2835 handle_start_search (void *cls,
2836 struct GNUNET_SERVER_Client *client,
2837 const struct GNUNET_MessageHeader *message)
2839 static GNUNET_HashCode all_zeros;
2840 const struct SearchMessage *sm;
2841 struct ClientList *cl;
2842 struct ClientRequestList *crl;
2843 struct PendingRequest *pr;
2848 msize = ntohs (message->size);
2849 if ( (msize < sizeof (struct SearchMessage)) ||
2850 (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
2853 GNUNET_SERVER_receive_done (client,
2857 GNUNET_STATISTICS_update (stats,
2858 gettext_noop ("# client searches received"),
2861 sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
2862 sm = (const struct SearchMessage*) message;
2865 while ( (cl != NULL) &&
2866 (cl->client != client) )
2870 cl = GNUNET_malloc (sizeof (struct ClientList));
2871 cl->client = client;
2872 GNUNET_SERVER_client_keep (client);
2873 cl->next = client_list;
2876 type = ntohl (sm->type);
2878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2879 "Received request for `%s' of type %u from local client\n",
2880 GNUNET_h2s (&sm->query),
2881 (unsigned int) type);
2885 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
2886 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2887 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2888 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2889 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2890 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2894 GNUNET_SERVER_receive_done (client,
2899 /* detect duplicate KBLOCK requests */
2900 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_KBLOCK) ||
2901 (type == GNUNET_DATASTORE_BLOCKTYPE_NBLOCK) ||
2902 (type == GNUNET_DATASTORE_BLOCKTYPE_ANY) )
2905 while ( (crl != NULL) &&
2906 ( (0 != memcmp (&crl->req->query,
2908 sizeof (GNUNET_HashCode))) ||
2909 (crl->req->type != type) ) )
2914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2915 "Have existing request, merging content-seen lists.\n");
2918 /* Duplicate request (used to send long list of
2919 known/blocked results); merge 'pr->replies_seen'
2920 and update bloom filter */
2921 GNUNET_array_grow (pr->replies_seen,
2922 pr->replies_seen_size,
2923 pr->replies_seen_off + sc);
2924 memcpy (&pr->replies_seen[pr->replies_seen_off],
2926 sc * sizeof (GNUNET_HashCode));
2927 pr->replies_seen_off += sc;
2929 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2930 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2934 GNUNET_STATISTICS_update (stats,
2935 gettext_noop ("# client searches updated (merged content seen list)"),
2938 GNUNET_SERVER_receive_done (client,
2943 GNUNET_STATISTICS_update (stats,
2944 gettext_noop ("# client searches active"),
2947 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2948 ((type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK)?sizeof(GNUNET_HashCode):0));
2949 crl = GNUNET_malloc (sizeof (struct ClientRequestList));
2950 memset (crl, 0, sizeof (struct ClientRequestList));
2951 crl->client_list = cl;
2952 GNUNET_CONTAINER_DLL_insert (cl->rl_head,
2957 pr->client_request_list = crl;
2958 GNUNET_array_grow (pr->replies_seen,
2959 pr->replies_seen_size,
2961 memcpy (pr->replies_seen,
2963 sc * sizeof (GNUNET_HashCode));
2964 pr->replies_seen_off = sc;
2965 pr->anonymity_level = ntohl (sm->anonymity_level);
2966 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2970 pr->query = sm->query;
2973 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2974 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2975 if (0 != memcmp (&sm->target,
2977 sizeof (GNUNET_HashCode)))
2978 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
2980 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2981 pr->namespace = (GNUNET_HashCode*) &pr[1];
2982 memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
2987 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2990 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2991 if (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK)
2992 type = GNUNET_DATASTORE_BLOCKTYPE_ANY; /* get on-demand blocks too! */
2993 pr->drq = GNUNET_FS_drq_get (&sm->query,
2995 &process_local_reply,
2997 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
3002 /* **************************** Startup ************************ */
3006 * List of handlers for P2P messages
3007 * that we care about.
3009 static struct GNUNET_CORE_MessageHandler p2p_handlers[] =
3012 GNUNET_MESSAGE_TYPE_FS_GET, 0 },
3014 GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
3020 * List of handlers for the messages understood by this
3023 static struct GNUNET_SERVER_MessageHandler handlers[] = {
3024 {&GNUNET_FS_handle_index_start, NULL,
3025 GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
3026 {&GNUNET_FS_handle_index_list_get, NULL,
3027 GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
3028 {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
3029 sizeof (struct UnindexMessage) },
3030 {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
3037 * Process fs requests.
3039 * @param s scheduler to use
3040 * @param server the initialized server
3041 * @param c configuration to use
3044 main_init (struct GNUNET_SCHEDULER_Handle *s,
3045 struct GNUNET_SERVER_Handle *server,
3046 const struct GNUNET_CONFIGURATION_Handle *c)
3050 stats = GNUNET_STATISTICS_create (sched, "fs", cfg);
3051 connected_peers = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3052 query_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3053 peer_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3054 requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3055 core = GNUNET_CORE_connect (sched,
3057 GNUNET_TIME_UNIT_FOREVER_REL,
3061 &peer_connect_handler,
3062 &peer_disconnect_handler,
3068 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3069 _("Failed to connect to `%s' service.\n"),
3071 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
3072 connected_peers = NULL;
3073 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
3074 query_request_map = NULL;
3075 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
3076 requests_by_expiration_heap = NULL;
3077 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
3078 peer_request_map = NULL;
3080 return GNUNET_SYSERR;
3082 GNUNET_SERVER_disconnect_notify (server,
3083 &handle_client_disconnect,
3085 GNUNET_SERVER_add_handlers (server, handlers);
3086 GNUNET_SCHEDULER_add_delayed (sched,
3087 GNUNET_TIME_UNIT_FOREVER_REL,
3095 * Process fs requests.
3097 * @param cls closure
3098 * @param sched scheduler to use
3099 * @param server the initialized server
3100 * @param cfg configuration to use
3104 struct GNUNET_SCHEDULER_Handle *sched,
3105 struct GNUNET_SERVER_Handle *server,
3106 const struct GNUNET_CONFIGURATION_Handle *cfg)
3108 if ( (GNUNET_OK != GNUNET_FS_drq_init (sched, cfg)) ||
3109 (GNUNET_OK != GNUNET_FS_indexing_init (sched, cfg)) ||
3110 (GNUNET_OK != main_init (sched, server, cfg)) )
3112 GNUNET_SCHEDULER_shutdown (sched);
3119 * The main function for the fs service.
3121 * @param argc number of arguments from the command line
3122 * @param argv command line arguments
3123 * @return 0 ok, 1 on error
3126 main (int argc, char *const *argv)
3128 return (GNUNET_OK ==
3129 GNUNET_SERVICE_run (argc,
3132 GNUNET_SERVICE_OPTION_NONE,
3133 &run, NULL)) ? 0 : 1;
3136 /* end of gnunet-service-fs.c */