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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,
671 if (NULL == pr->client_request_list)
673 GNUNET_STATISTICS_update (stats,
674 gettext_noop ("# P2P searches active"),
680 GNUNET_STATISTICS_update (stats,
681 gettext_noop ("# client searches active"),
685 /* might have already been removed from map in 'process_reply' (if
686 there was a unique reply) or never inserted if it was a
687 duplicate; hence ignore the return value here */
688 (void) GNUNET_CONTAINER_multihashmap_remove (query_request_map,
693 GNUNET_FS_drq_get_cancel (pr->drq);
696 if (pr->client_request_list != NULL)
698 GNUNET_CONTAINER_DLL_remove (pr->client_request_list->client_list->rl_head,
699 pr->client_request_list->client_list->rl_tail,
700 pr->client_request_list);
701 GNUNET_free (pr->client_request_list);
702 pr->client_request_list = NULL;
706 GNUNET_PEER_resolve (pr->cp->pid,
708 (void) GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
715 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
720 GNUNET_CORE_peer_change_preference_cancel (pr->irc);
723 if (pr->replies_seen != NULL)
725 GNUNET_free (pr->replies_seen);
726 pr->replies_seen = NULL;
728 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
730 GNUNET_SCHEDULER_cancel (sched,
732 pr->task = GNUNET_SCHEDULER_NO_TASK;
734 while (NULL != pr->pending_head)
735 destroy_pending_message_list_entry (pr->pending_head);
736 GNUNET_PEER_change_rc (pr->target_pid, -1);
737 if (pr->used_pids != NULL)
739 GNUNET_PEER_decrement_rcs (pr->used_pids, pr->used_pids_off);
740 GNUNET_free (pr->used_pids);
741 pr->used_pids_off = 0;
742 pr->used_pids_size = 0;
743 pr->used_pids = NULL;
750 * Method called whenever a given peer connects.
752 * @param cls closure, not used
753 * @param peer peer identity this notification is about
754 * @param latency reported latency of the connection with 'other'
755 * @param distance reported distance (DV) to 'other'
758 peer_connect_handler (void *cls,
760 GNUNET_PeerIdentity * peer,
761 struct GNUNET_TIME_Relative latency,
764 struct ConnectedPeer *cp;
766 cp = GNUNET_malloc (sizeof (struct ConnectedPeer));
767 cp->pid = GNUNET_PEER_intern (peer);
768 GNUNET_CONTAINER_multihashmap_put (connected_peers,
771 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
776 * Free (each) request made by the peer.
778 * @param cls closure, points to peer that the request belongs to
779 * @param key current key code
780 * @param value value in the hash map
781 * @return GNUNET_YES (we should continue to iterate)
784 destroy_request (void *cls,
785 const GNUNET_HashCode * key,
788 const struct GNUNET_PeerIdentity * peer = cls;
789 struct PendingRequest *pr = value;
791 GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
794 destroy_pending_request (pr);
800 * Method called whenever a peer disconnects.
802 * @param cls closure, not used
803 * @param peer peer identity this notification is about
806 peer_disconnect_handler (void *cls,
808 GNUNET_PeerIdentity * peer)
810 struct ConnectedPeer *cp;
811 struct PendingMessage *pm;
814 GNUNET_CONTAINER_multihashmap_get_multiple (peer_request_map,
818 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
822 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
824 if (NULL != cp->last_client_replies[i])
826 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
827 cp->last_client_replies[i] = NULL;
830 GNUNET_CONTAINER_multihashmap_remove (connected_peers,
833 GNUNET_PEER_change_rc (cp->pid, -1);
834 GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
836 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
837 while (NULL != (pm = cp->pending_messages_head))
838 destroy_pending_message (pm, 0 /* delivery failed */);
839 GNUNET_break (0 == cp->pending_requests);
845 * Iterator over hash map entries that removes all occurences
846 * of the given 'client' from the 'last_client_replies' of the
847 * given connected peer.
849 * @param cls closure, the 'struct GNUNET_SERVER_Client*' to remove
850 * @param key current key code (unused)
851 * @param value value in the hash map (the 'struct ConnectedPeer*' to change)
852 * @return GNUNET_YES (we should continue to iterate)
855 remove_client_from_last_client_replies (void *cls,
856 const GNUNET_HashCode * key,
859 struct GNUNET_SERVER_Client *client = cls;
860 struct ConnectedPeer *cp = value;
863 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
865 if (cp->last_client_replies[i] == client)
867 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
868 cp->last_client_replies[i] = NULL;
876 * A client disconnected. Remove all of its pending queries.
878 * @param cls closure, NULL
879 * @param client identification of the client
882 handle_client_disconnect (void *cls,
883 struct GNUNET_SERVER_Client
886 struct ClientList *pos;
887 struct ClientList *prev;
888 struct ClientRequestList *rcl;
889 struct ClientResponseMessage *creply;
895 while ( (NULL != pos) &&
896 (pos->client != client) )
902 return; /* no requests pending for this client */
903 while (NULL != (rcl = pos->rl_head))
905 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
906 "Destroying pending request `%s' on disconnect\n",
907 GNUNET_h2s (&rcl->req->query));
908 destroy_pending_request (rcl->req);
911 client_list = pos->next;
913 prev->next = pos->next;
916 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
919 while (NULL != (creply = pos->res_head))
921 GNUNET_CONTAINER_DLL_remove (pos->res_head,
924 GNUNET_free (creply);
926 GNUNET_SERVER_client_drop (pos->client);
928 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
929 &remove_client_from_last_client_replies,
935 * Iterator to free peer entries.
937 * @param cls closure, unused
938 * @param key current key code
939 * @param value value in the hash map (peer entry)
940 * @return GNUNET_YES (we should continue to iterate)
943 clean_peer (void *cls,
944 const GNUNET_HashCode * key,
947 peer_disconnect_handler (NULL, (const struct GNUNET_PeerIdentity*) key);
953 * Task run during shutdown.
959 shutdown_task (void *cls,
960 const struct GNUNET_SCHEDULER_TaskContext *tc)
962 while (client_list != NULL)
963 handle_client_disconnect (NULL,
964 client_list->client);
965 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
968 GNUNET_break (0 == GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap));
969 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
970 requests_by_expiration_heap = 0;
971 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
972 connected_peers = NULL;
973 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
974 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
975 query_request_map = NULL;
976 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
977 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
978 peer_request_map = NULL;
979 GNUNET_assert (NULL != core);
980 GNUNET_CORE_disconnect (core);
984 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
992 /* ******************* Utility functions ******************** */
996 * Transmit the given message by copying it to the target buffer
997 * "buf". "buf" will be NULL and "size" zero if the socket was closed
998 * for writing in the meantime. In that case, do nothing
999 * (the disconnect or shutdown handler will take care of the rest).
1000 * If we were able to transmit messages and there are still more
1001 * pending, ask core again for further calls to this function.
1003 * @param cls closure, pointer to the 'struct ConnectedPeer*'
1004 * @param size number of bytes available in buf
1005 * @param buf where the callee should write the message
1006 * @return number of bytes written to buf
1009 transmit_to_peer (void *cls,
1010 size_t size, void *buf)
1012 struct ConnectedPeer *cp = cls;
1014 struct GNUNET_PeerIdentity pid;
1015 struct PendingMessage *pm;
1022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1023 "Dropping message, core too busy.\n");
1028 while ( (NULL != (pm = cp->pending_messages_head) ) &&
1029 (pm->msize <= size) )
1031 memcpy (&cbuf[msize], &pm[1], pm->msize);
1034 destroy_pending_message (pm, cp->pid);
1038 GNUNET_PEER_resolve (cp->pid,
1040 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1042 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1050 "Transmitting %u bytes to peer %u.\n",
1059 * Add a message to the set of pending messages for the given peer.
1061 * @param cp peer to send message to
1062 * @param pm message to queue
1063 * @param pr request on which behalf this message is being queued
1066 add_to_pending_messages_for_peer (struct ConnectedPeer *cp,
1067 struct PendingMessage *pm,
1068 struct PendingRequest *pr)
1070 struct PendingMessage *pos;
1071 struct PendingMessageList *pml;
1072 struct GNUNET_PeerIdentity pid;
1074 GNUNET_assert (pm->next == NULL);
1075 GNUNET_assert (pm->pml == NULL);
1076 pml = GNUNET_malloc (sizeof (struct PendingMessageList));
1081 GNUNET_CONTAINER_DLL_insert (pr->pending_head,
1084 pos = cp->pending_messages_head;
1085 while ( (pos != NULL) &&
1086 (pm->priority < pos->priority) )
1088 GNUNET_CONTAINER_DLL_insert_after (cp->pending_messages_head,
1089 cp->pending_messages_tail,
1092 cp->pending_requests++;
1093 if (cp->pending_requests > MAX_QUEUE_PER_PEER)
1094 destroy_pending_message (cp->pending_messages_tail, 0);
1095 if (cp->cth == NULL)
1097 /* need to schedule transmission */
1098 GNUNET_PEER_resolve (cp->pid, &pid);
1099 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
1100 cp->pending_messages_head->priority,
1103 cp->pending_messages_head->msize,
1107 if (cp->cth == NULL)
1110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1111 "Failed to schedule transmission with core!\n");
1113 /* FIXME: call stats (rare, bad case) */
1119 * Mingle hash with the mingle_number to produce different bits.
1122 mingle_hash (const GNUNET_HashCode * in,
1123 int32_t mingle_number,
1124 GNUNET_HashCode * hc)
1128 GNUNET_CRYPTO_hash (&mingle_number,
1131 GNUNET_CRYPTO_hash_xor (&m, in, hc);
1136 * Test if the load on this peer is too high
1137 * to even consider processing the query at
1140 * @return GNUNET_YES if the load is too high, GNUNET_NO otherwise
1143 test_load_too_high ()
1145 return GNUNET_NO; // FIXME
1149 /* ******************* Pending Request Refresh Task ******************** */
1154 * We use a random delay to make the timing of requests less
1155 * predictable. This function returns such a random delay. We add a base
1156 * delay of MAX_CORK_DELAY (1s).
1158 * FIXME: make schedule dependent on the specifics of the request?
1159 * Or bandwidth and number of connected peers and load?
1161 * @return random delay to use for some request, between 1s and 1000+TTL_DECREMENT ms
1163 static struct GNUNET_TIME_Relative
1164 get_processing_delay ()
1167 GNUNET_TIME_relative_add (GNUNET_CONSTANTS_MAX_CORK_DELAY,
1168 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1169 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1175 * We're processing a GET request from another peer and have decided
1176 * to forward it to other peers. This function is called periodically
1177 * and should forward the request to other peers until we have all
1178 * possible replies. If we have transmitted the *only* reply to
1179 * the initiator we should destroy the pending request. If we have
1180 * many replies in the queue to the initiator, we should delay sending
1181 * out more queries until the reply queue has shrunk some.
1183 * @param cls our "struct ProcessGetContext *"
1187 forward_request_task (void *cls,
1188 const struct GNUNET_SCHEDULER_TaskContext *tc);
1192 * Function called after we either failed or succeeded
1193 * at transmitting a query to a peer.
1195 * @param cls the requests "struct PendingRequest*"
1196 * @param tpid ID of receiving peer, 0 on transmission error
1199 transmit_query_continuation (void *cls,
1200 GNUNET_PEER_Id tpid)
1202 struct PendingRequest *pr = cls;
1204 GNUNET_STATISTICS_update (stats,
1205 gettext_noop ("# queries scheduled for forwarding"),
1211 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1212 "Transmission of request failed, will try again later.\n");
1214 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1215 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1216 get_processing_delay (),
1217 &forward_request_task,
1221 GNUNET_STATISTICS_update (stats,
1222 gettext_noop ("# queries forwarded"),
1225 GNUNET_PEER_change_rc (tpid, 1);
1226 if (pr->used_pids_off == pr->used_pids_size)
1227 GNUNET_array_grow (pr->used_pids,
1229 pr->used_pids_size * 2 + 2);
1230 pr->used_pids[pr->used_pids_off++] = tpid;
1231 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1232 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1233 get_processing_delay (),
1234 &forward_request_task,
1240 * How many bytes should a bloomfilter be if we have already seen
1241 * entry_count responses? Note that BLOOMFILTER_K gives us the number
1242 * of bits set per entry. Furthermore, we should not re-size the
1243 * filter too often (to keep it cheap).
1245 * Since other peers will also add entries but not resize the filter,
1246 * we should generally pick a slightly larger size than what the
1247 * strict math would suggest.
1249 * @return must be a power of two and smaller or equal to 2^15.
1252 compute_bloomfilter_size (unsigned int entry_count)
1255 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
1256 uint16_t max = 1 << 15;
1258 if (entry_count > max)
1261 while ((size < max) && (size < ideal))
1270 * Recalculate our bloom filter for filtering replies.
1272 * @param count number of entries we are filtering right now
1273 * @param mingle set to our new mingling value
1274 * @param bf_size set to the size of the bloomfilter
1275 * @param entries the entries to filter
1276 * @return updated bloomfilter, NULL for none
1278 static struct GNUNET_CONTAINER_BloomFilter *
1279 refresh_bloomfilter (unsigned int count,
1282 const GNUNET_HashCode *entries)
1284 struct GNUNET_CONTAINER_BloomFilter *bf;
1287 GNUNET_HashCode mhash;
1291 nsize = compute_bloomfilter_size (count);
1292 *mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, -1);
1294 bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
1297 for (i=0;i<count;i++)
1299 mingle_hash (&entries[i], *mingle, &mhash);
1300 GNUNET_CONTAINER_bloomfilter_add (bf, &mhash);
1307 * Function called after we've tried to reserve a certain amount of
1308 * bandwidth for a reply. Check if we succeeded and if so send our
1311 * @param cls the requests "struct PendingRequest*"
1312 * @param peer identifies the peer
1313 * @param bpm_in set to the current bandwidth limit (receiving) for this peer
1314 * @param bpm_out set to the current bandwidth limit (sending) for this peer
1315 * @param amount set to the amount that was actually reserved or unreserved
1316 * @param preference current traffic preference for the given peer
1319 target_reservation_cb (void *cls,
1321 GNUNET_PeerIdentity * peer,
1322 struct GNUNET_BANDWIDTH_Value32NBO bpm_in,
1323 struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
1325 uint64_t preference)
1327 struct PendingRequest *pr = cls;
1328 struct ConnectedPeer *cp;
1329 struct PendingMessage *pm;
1330 struct GetMessage *gm;
1331 GNUNET_HashCode *ext;
1341 /* error in communication with core, try again later */
1342 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1343 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1344 get_processing_delay (),
1345 &forward_request_task,
1349 // (3) transmit, update ttl/priority
1350 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1354 /* Peer must have just left */
1356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1357 "Selected peer disconnected!\n");
1359 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1360 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1361 get_processing_delay (),
1362 &forward_request_task,
1366 no_route = GNUNET_NO;
1367 /* FIXME: check against DBLOCK_SIZE and possibly return
1368 amount to reserve; however, this also needs to work
1369 with testcases which currently start out with a far
1370 too low per-peer bw limit, so they would never send
1371 anything. Big issue. */
1377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1378 "Failed to reserve bandwidth for reply (got %d/%u bytes only)!\n",
1382 GNUNET_STATISTICS_update (stats,
1383 gettext_noop ("# reply bandwidth reservation requests failed"),
1386 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
1387 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1388 get_processing_delay (),
1389 &forward_request_task,
1391 return; /* this target round failed */
1393 /* FIXME: if we are "quite" busy, we may still want to skip
1394 this round; need more load detection code! */
1395 no_route = GNUNET_YES;
1398 GNUNET_STATISTICS_update (stats,
1399 gettext_noop ("# queries scheduled for forwarding"),
1402 /* build message and insert message into priority queue */
1404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1405 "Forwarding request `%s' to `%4s'!\n",
1406 GNUNET_h2s (&pr->query),
1411 if (GNUNET_YES == no_route)
1413 bm |= GET_MESSAGE_BIT_RETURN_TO;
1416 if (pr->namespace != NULL)
1418 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
1421 if (pr->target_pid != 0)
1423 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
1426 msize = sizeof (struct GetMessage) + pr->bf_size + k * sizeof(GNUNET_HashCode);
1427 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1428 pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1430 gm = (struct GetMessage*) &pm[1];
1431 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
1432 gm->header.size = htons (msize);
1433 gm->type = htonl (pr->type);
1434 pr->remaining_priority /= 2;
1435 gm->priority = htonl (pr->remaining_priority);
1436 gm->ttl = htonl (pr->ttl);
1437 gm->filter_mutator = htonl(pr->mingle);
1438 gm->hash_bitmap = htonl (bm);
1439 gm->query = pr->query;
1440 ext = (GNUNET_HashCode*) &gm[1];
1442 if (GNUNET_YES == no_route)
1443 GNUNET_PEER_resolve (pr->cp->pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1444 if (pr->namespace != NULL)
1445 memcpy (&ext[k++], pr->namespace, sizeof (GNUNET_HashCode));
1446 if (pr->target_pid != 0)
1447 GNUNET_PEER_resolve (pr->target_pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
1448 bfdata = (char *) &ext[k];
1450 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
1453 pm->cont = &transmit_query_continuation;
1455 add_to_pending_messages_for_peer (cp, pm, pr);
1460 * Closure used for "target_peer_select_cb".
1462 struct PeerSelectionContext
1465 * The request for which we are selecting
1468 struct PendingRequest *pr;
1471 * Current "prime" target.
1473 struct GNUNET_PeerIdentity target;
1476 * How much do we like this target?
1478 double target_score;
1484 * Function called for each connected peer to determine
1485 * which one(s) would make good targets for forwarding.
1487 * @param cls closure (struct PeerSelectionContext)
1488 * @param key current key code (peer identity)
1489 * @param value value in the hash map (struct ConnectedPeer)
1490 * @return GNUNET_YES if we should continue to
1495 target_peer_select_cb (void *cls,
1496 const GNUNET_HashCode * key,
1499 struct PeerSelectionContext *psc = cls;
1500 struct ConnectedPeer *cp = value;
1501 struct PendingRequest *pr = psc->pr;
1506 /* 1) check that this peer is not the initiator */
1508 return GNUNET_YES; /* skip */
1510 /* 2) check if we have already (recently) forwarded to this peer */
1512 for (i=0;i<pr->used_pids_off;i++)
1513 if (pr->used_pids[i] == cp->pid)
1516 if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1517 RETRY_PROBABILITY_INV))
1520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1521 "NOT re-trying query that was previously transmitted %u times\n",
1522 (unsigned int) pr->used_pids_off);
1524 return GNUNET_YES; /* skip */
1529 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1530 "Re-trying query that was previously transmitted %u times to this peer\n",
1533 // 3) calculate how much we'd like to forward to this peer
1534 score = 42; // FIXME!
1535 // FIXME: also need API to gather data on responsiveness
1536 // of this peer (we have fields for that in 'cp', but
1537 // they are never set!)
1539 /* store best-fit in closure */
1540 if (score > psc->target_score)
1542 psc->target_score = score;
1543 psc->target.hashPubKey = *key;
1550 * The priority level imposes a bound on the maximum
1551 * value for the ttl that can be requested.
1553 * @param ttl_in requested ttl
1554 * @param prio given priority
1555 * @return ttl_in if ttl_in is below the limit,
1556 * otherwise the ttl-limit for the given priority
1559 bound_ttl (int32_t ttl_in, uint32_t prio)
1561 unsigned long long allowed;
1565 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
1566 if (ttl_in > allowed)
1568 if (allowed >= (1 << 30))
1577 * We're processing a GET request from another peer and have decided
1578 * to forward it to other peers. This function is called periodically
1579 * and should forward the request to other peers until we have all
1580 * possible replies. If we have transmitted the *only* reply to
1581 * the initiator we should destroy the pending request. If we have
1582 * many replies in the queue to the initiator, we should delay sending
1583 * out more queries until the reply queue has shrunk some.
1585 * @param cls our "struct ProcessGetContext *"
1589 forward_request_task (void *cls,
1590 const struct GNUNET_SCHEDULER_TaskContext *tc)
1592 struct PendingRequest *pr = cls;
1593 struct PeerSelectionContext psc;
1594 struct ConnectedPeer *cp;
1595 struct GNUNET_TIME_Relative delay;
1597 pr->task = GNUNET_SCHEDULER_NO_TASK;
1598 if (pr->irc != NULL)
1601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1602 "Forwarding of query `%s' not attempted due to pending local lookup!\n",
1603 GNUNET_h2s (&pr->query));
1605 return; /* already pending */
1607 /* (1) select target */
1609 psc.target_score = DBL_MIN;
1610 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1611 &target_peer_select_cb,
1613 if (psc.target_score == DBL_MIN)
1615 delay = get_processing_delay ();
1617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1618 "No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
1619 GNUNET_h2s (&pr->query),
1622 pr->task = GNUNET_SCHEDULER_add_delayed (sched,
1624 &forward_request_task,
1626 return; /* nobody selected */
1628 /* (3) update TTL/priority */
1630 if (pr->client_request_list != NULL)
1632 /* FIXME: use better algorithm!? */
1633 if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1636 /* FIXME: bound priority by "customary" priority used by other peers
1638 pr->ttl = bound_ttl (pr->ttl + TTL_DECREMENT * 2,
1640 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1641 "Trying query `%s' with priority %u and TTL %d.\n",
1642 GNUNET_h2s (&pr->query),
1648 /* FIXME: should we do something here as well!? */
1651 /* (3) reserve reply bandwidth */
1652 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1653 &psc.target.hashPubKey);
1654 pr->irc = GNUNET_CORE_peer_change_preference (sched, cfg,
1656 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1657 GNUNET_BANDWIDTH_value_init ((uint32_t) -1 /* no limit */),
1659 (uint64_t) cp->inc_preference,
1660 &target_reservation_cb,
1662 cp->inc_preference = 0.0;
1666 /* **************************** P2P PUT Handling ************************ */
1670 * Function called after we either failed or succeeded
1671 * at transmitting a reply to a peer.
1673 * @param cls the requests "struct PendingRequest*"
1674 * @param tpid ID of receiving peer, 0 on transmission error
1677 transmit_reply_continuation (void *cls,
1678 GNUNET_PEER_Id tpid)
1680 struct PendingRequest *pr = cls;
1684 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
1685 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
1686 /* only one reply expected, done with the request! */
1687 destroy_pending_request (pr);
1689 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
1690 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
1691 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
1701 * Check if the given KBlock is well-formed.
1703 * @param kb the kblock data (or at least "dsize" bytes claiming to be one)
1704 * @param dsize size of "kb" in bytes; check for < sizeof(struct KBlock)!
1705 * @param query where to store the query that this block answers
1706 * @return GNUNET_OK if this is actually a well-formed KBlock
1709 check_kblock (const struct KBlock *kb,
1711 GNUNET_HashCode *query)
1713 if (dsize < sizeof (struct KBlock))
1715 GNUNET_break_op (0);
1716 return GNUNET_SYSERR;
1718 if (dsize - sizeof (struct KBlock) !=
1719 ntohl (kb->purpose.size)
1720 - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
1721 - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
1723 GNUNET_break_op (0);
1724 return GNUNET_SYSERR;
1727 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_KBLOCK,
1732 GNUNET_break_op (0);
1733 return GNUNET_SYSERR;
1736 GNUNET_CRYPTO_hash (&kb->keyspace,
1737 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1744 * Check if the given NBlock is well-formed.
1746 * @param nb the nblock data (or at least "dsize" bytes claiming to be one)
1747 * @param dsize size of "nb" in bytes; check for < sizeof(struct NBlock)!
1748 * @param query where to store the query that this block answers
1749 * @return GNUNET_OK if this is actually a well-formed NBlock
1752 check_nblock (const struct NBlock *nb,
1754 GNUNET_HashCode *query)
1756 if (dsize < sizeof (struct NBlock))
1758 GNUNET_break_op (0);
1759 return GNUNET_SYSERR;
1761 if (dsize - sizeof (struct NBlock) !=
1762 ntohl (nb->ns_purpose.size)
1763 - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
1764 - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
1766 GNUNET_break_op (0);
1767 return GNUNET_SYSERR;
1770 ntohl (nb->ksk_purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
1772 GNUNET_break_op (0);
1773 return GNUNET_SYSERR;
1776 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK_KSIG,
1781 GNUNET_break_op (0);
1782 return GNUNET_SYSERR;
1785 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK,
1790 GNUNET_break_op (0);
1791 return GNUNET_SYSERR;
1794 GNUNET_CRYPTO_hash (&nb->keyspace,
1795 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1802 * Check if the given SBlock is well-formed.
1804 * @param sb the sblock data (or at least "dsize" bytes claiming to be one)
1805 * @param dsize size of "kb" in bytes; check for < sizeof(struct SBlock)!
1806 * @param query where to store the query that this block answers
1807 * @param namespace where to store the namespace that this block belongs to
1808 * @return GNUNET_OK if this is actually a well-formed SBlock
1811 check_sblock (const struct SBlock *sb,
1813 GNUNET_HashCode *query,
1814 GNUNET_HashCode *namespace)
1816 if (dsize < sizeof (struct SBlock))
1818 GNUNET_break_op (0);
1819 return GNUNET_SYSERR;
1822 ntohl (sb->purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
1824 GNUNET_break_op (0);
1825 return GNUNET_SYSERR;
1828 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_SBLOCK,
1833 GNUNET_break_op (0);
1834 return GNUNET_SYSERR;
1837 *query = sb->identifier;
1838 if (namespace != NULL)
1839 GNUNET_CRYPTO_hash (&sb->subspace,
1840 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1847 * Transmit the given message by copying it to the target buffer
1848 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1849 * for writing in the meantime. In that case, do nothing
1850 * (the disconnect or shutdown handler will take care of the rest).
1851 * If we were able to transmit messages and there are still more
1852 * pending, ask core again for further calls to this function.
1854 * @param cls closure, pointer to the 'struct ClientList*'
1855 * @param size number of bytes available in buf
1856 * @param buf where the callee should write the message
1857 * @return number of bytes written to buf
1860 transmit_to_client (void *cls,
1861 size_t size, void *buf)
1863 struct ClientList *cl = cls;
1865 struct ClientResponseMessage *creply;
1872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1873 "Not sending reply, client communication problem.\n");
1878 while ( (NULL != (creply = cl->res_head) ) &&
1879 (creply->msize <= size) )
1881 memcpy (&cbuf[msize], &creply[1], creply->msize);
1882 msize += creply->msize;
1883 size -= creply->msize;
1884 GNUNET_CONTAINER_DLL_remove (cl->res_head,
1887 GNUNET_free (creply);
1890 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
1892 GNUNET_TIME_UNIT_FOREVER_REL,
1893 &transmit_to_client,
1896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1897 "Transmitted %u bytes to client\n",
1898 (unsigned int) msize);
1905 * Closure for "process_reply" function.
1907 struct ProcessReplyClosure
1910 * The data for the reply.
1914 // FIXME: add 'struct ConnectedPeer' to track 'last_xxx_replies' here!
1917 * When the reply expires.
1919 struct GNUNET_TIME_Absolute expiration;
1927 * Namespace that this reply belongs to
1928 * (if it is of type SBLOCK).
1930 GNUNET_HashCode namespace;
1933 * Type of the block.
1938 * How much was this reply worth to us?
1945 * We have received a reply; handle it!
1947 * @param cls response (struct ProcessReplyClosure)
1948 * @param key our query
1949 * @param value value in the hash map (info about the query)
1950 * @return GNUNET_YES (we should continue to iterate)
1953 process_reply (void *cls,
1954 const GNUNET_HashCode * key,
1957 struct ProcessReplyClosure *prq = cls;
1958 struct PendingRequest *pr = value;
1959 struct PendingMessage *reply;
1960 struct ClientResponseMessage *creply;
1961 struct ClientList *cl;
1962 struct PutMessage *pm;
1963 struct ConnectedPeer *cp;
1964 GNUNET_HashCode chash;
1965 GNUNET_HashCode mhash;
1969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1970 "Matched result (type %u) for query `%s' with pending request\n",
1971 (unsigned int) prq->type,
1974 GNUNET_STATISTICS_update (stats,
1975 gettext_noop ("# replies received and matched"),
1978 GNUNET_CRYPTO_hash (prq->data,
1983 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
1984 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
1985 /* only possible reply, stop requesting! */
1986 while (NULL != pr->pending_head)
1987 destroy_pending_message_list_entry (pr->pending_head);
1988 if (pr->drq != NULL)
1990 if (pr->client_request_list != NULL)
1991 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
1993 GNUNET_FS_drq_get_cancel (pr->drq);
1996 pr->do_remove = GNUNET_YES;
1997 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
1999 GNUNET_SCHEDULER_cancel (sched,
2001 pr->task = GNUNET_SCHEDULER_NO_TASK;
2003 GNUNET_break (GNUNET_YES ==
2004 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
2008 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2009 if (pr->namespace == NULL)
2014 if (0 != memcmp (pr->namespace,
2016 sizeof (GNUNET_HashCode)))
2018 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2019 _("Reply mismatched in terms of namespace. Discarded.\n"));
2020 return GNUNET_YES; /* wrong namespace */
2022 /* then: fall-through! */
2023 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2024 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2027 mingle_hash (&chash, pr->mingle, &mhash);
2028 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2031 GNUNET_STATISTICS_update (stats,
2032 gettext_noop ("# duplicate replies discarded (bloomfilter)"),
2036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2037 "Duplicate response `%s', discarding.\n",
2038 GNUNET_h2s (&mhash));
2040 return GNUNET_YES; /* duplicate */
2043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2044 "New response `%s', adding to filter.\n",
2045 GNUNET_h2s (&mhash));
2047 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
2050 if (pr->client_request_list != NULL)
2052 if (pr->replies_seen_size == pr->replies_seen_off)
2054 GNUNET_array_grow (pr->replies_seen,
2055 pr->replies_seen_size,
2056 pr->replies_seen_size * 2 + 4);
2058 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2059 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2064 pr->replies_seen[pr->replies_seen_off++] = chash;
2071 prq->priority += pr->remaining_priority;
2072 pr->remaining_priority = 0;
2073 if (pr->client_request_list != NULL)
2075 GNUNET_STATISTICS_update (stats,
2076 gettext_noop ("# replies received for local clients"),
2079 cl = pr->client_request_list->client_list;
2080 msize = sizeof (struct PutMessage) + prq->size;
2081 creply = GNUNET_malloc (msize + sizeof (struct ClientResponseMessage));
2082 creply->msize = msize;
2083 creply->client_list = cl;
2084 GNUNET_CONTAINER_DLL_insert_after (cl->res_head,
2088 pm = (struct PutMessage*) &creply[1];
2089 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2090 pm->header.size = htons (msize);
2091 pm->type = htonl (prq->type);
2092 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
2093 memcpy (&pm[1], prq->data, prq->size);
2097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2098 "Transmitting result for query `%s' to client\n",
2101 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
2103 GNUNET_TIME_UNIT_FOREVER_REL,
2104 &transmit_to_client,
2107 GNUNET_break (cl->th != NULL);
2109 destroy_pending_request (pr);
2115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2116 "Transmitting result for query `%s' to other peer (PID=%u)\n",
2118 (unsigned int) cp->pid);
2120 GNUNET_STATISTICS_update (stats,
2121 gettext_noop ("# replies received for other peers"),
2124 msize = sizeof (struct PutMessage) + prq->size;
2125 reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
2126 reply->cont = &transmit_reply_continuation;
2127 reply->cont_cls = pr;
2128 reply->msize = msize;
2129 reply->priority = (uint32_t) -1; /* send replies first! */
2130 pm = (struct PutMessage*) &reply[1];
2131 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2132 pm->header.size = htons (msize);
2133 pm->type = htonl (prq->type);
2134 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
2135 memcpy (&pm[1], prq->data, prq->size);
2136 add_to_pending_messages_for_peer (cp, reply, pr);
2138 // FIXME: implement hot-path routing statistics keeping!
2144 * Handle P2P "PUT" message.
2146 * @param cls closure, always NULL
2147 * @param other the other peer involved (sender or receiver, NULL
2148 * for loopback messages where we are both sender and receiver)
2149 * @param message the actual message
2150 * @param latency reported latency of the connection with 'other'
2151 * @param distance reported distance (DV) to 'other'
2152 * @return GNUNET_OK to keep the connection open,
2153 * GNUNET_SYSERR to close it (signal serious error)
2156 handle_p2p_put (void *cls,
2157 const struct GNUNET_PeerIdentity *other,
2158 const struct GNUNET_MessageHeader *message,
2159 struct GNUNET_TIME_Relative latency,
2162 const struct PutMessage *put;
2166 struct GNUNET_TIME_Absolute expiration;
2167 GNUNET_HashCode query;
2168 struct ProcessReplyClosure prq;
2170 msize = ntohs (message->size);
2171 if (msize < sizeof (struct PutMessage))
2174 return GNUNET_SYSERR;
2176 put = (const struct PutMessage*) message;
2177 dsize = msize - sizeof (struct PutMessage);
2178 type = ntohl (put->type);
2179 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
2181 /* first, validate! */
2184 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2185 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2186 GNUNET_CRYPTO_hash (&put[1], dsize, &query);
2188 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2190 check_kblock ((const struct KBlock*) &put[1],
2193 return GNUNET_SYSERR;
2195 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2197 check_sblock ((const struct SBlock*) &put[1],
2201 return GNUNET_SYSERR;
2203 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2205 check_nblock ((const struct NBlock*) &put[1],
2208 return GNUNET_SYSERR;
2211 /* unknown block type */
2212 GNUNET_break_op (0);
2213 return GNUNET_SYSERR;
2217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2218 "Received result for query `%s' from peer `%4s'\n",
2219 GNUNET_h2s (&query),
2220 GNUNET_i2s (other));
2222 GNUNET_STATISTICS_update (stats,
2223 gettext_noop ("# replies received (overall)"),
2226 /* now, lookup 'query' */
2227 prq.data = (const void*) &put[1];
2230 prq.expiration = expiration;
2232 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2236 // FIXME: if migration is on and load is low,
2237 // queue to store data in datastore;
2238 // use "prq.priority" for that!
2243 /* **************************** P2P GET Handling ************************ */
2247 * Closure for 'check_duplicate_request_{peer,client}'.
2249 struct CheckDuplicateRequestClosure
2252 * The new request we should check if it already exists.
2254 const struct PendingRequest *pr;
2257 * Existing request found by the checker, NULL if none.
2259 struct PendingRequest *have;
2264 * Iterator over entries in the 'query_request_map' that
2265 * tries to see if we have the same request pending from
2266 * the same client already.
2268 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2269 * @param key current key code (query, ignored, must match)
2270 * @param value value in the hash map (a 'struct PendingRequest'
2271 * that already exists)
2272 * @return GNUNET_YES if we should continue to
2273 * iterate (no match yet)
2274 * GNUNET_NO if not (match found).
2277 check_duplicate_request_client (void *cls,
2278 const GNUNET_HashCode * key,
2281 struct CheckDuplicateRequestClosure *cdc = cls;
2282 struct PendingRequest *have = value;
2284 if (have->client_request_list == NULL)
2286 if ( (cdc->pr->client_request_list->client_list->client == have->client_request_list->client_list->client) &&
2297 * We're processing (local) results for a search request
2298 * from another peer. Pass applicable results to the
2299 * peer and if we are done either clean up (operation
2300 * complete) or forward to other peers (more results possible).
2302 * @param cls our closure (struct LocalGetContext)
2303 * @param key key for the content
2304 * @param size number of bytes in data
2305 * @param data content stored
2306 * @param type type of the content
2307 * @param priority priority of the content
2308 * @param anonymity anonymity-level for the content
2309 * @param expiration expiration time for the content
2310 * @param uid unique identifier for the datum;
2311 * maybe 0 if no unique identifier is available
2314 process_local_reply (void *cls,
2315 const GNUNET_HashCode * key,
2321 struct GNUNET_TIME_Absolute
2325 struct PendingRequest *pr = cls;
2326 struct ProcessReplyClosure prq;
2327 struct CheckDuplicateRequestClosure cdrc;
2328 GNUNET_HashCode dhash;
2329 GNUNET_HashCode mhash;
2330 GNUNET_HashCode query;
2335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2336 "Done processing local replies, forwarding request to other peers.\n");
2339 if (pr->client_request_list != NULL)
2341 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
2343 /* Figure out if this is a duplicate request and possibly
2344 merge 'struct PendingRequest' entries */
2347 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2349 &check_duplicate_request_client,
2351 if (cdrc.have != NULL)
2354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2355 "Received request for block `%s' twice from client, will only request once.\n",
2356 GNUNET_h2s (&pr->query));
2359 destroy_pending_request (pr);
2364 /* no more results */
2365 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2366 pr->task = GNUNET_SCHEDULER_add_now (sched,
2367 &forward_request_task,
2372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2373 "New local response to `%s' of type %u.\n",
2377 if (type == GNUNET_DATASTORE_BLOCKTYPE_ONDEMAND)
2380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2381 "Found ONDEMAND block, performing on-demand encoding\n");
2383 GNUNET_STATISTICS_update (stats,
2384 gettext_noop ("# on-demand blocks matched requests"),
2388 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
2389 anonymity, expiration, uid,
2390 &process_local_reply,
2392 GNUNET_FS_drq_get_next (GNUNET_YES);
2395 /* check for duplicates */
2396 GNUNET_CRYPTO_hash (data, size, &dhash);
2397 mingle_hash (&dhash,
2400 if ( (pr->bf != NULL) &&
2402 GNUNET_CONTAINER_bloomfilter_test (pr->bf,
2406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2407 "Result from datastore filtered by bloomfilter (duplicate).\n");
2409 GNUNET_STATISTICS_update (stats,
2410 gettext_noop ("# results filtered by query bloomfilter"),
2413 GNUNET_FS_drq_get_next (GNUNET_YES);
2417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2418 "Found result for query `%s' in local datastore\n",
2421 GNUNET_STATISTICS_update (stats,
2422 gettext_noop ("# results found locally"),
2425 pr->results_found++;
2426 if ( (pr->type == GNUNET_DATASTORE_BLOCKTYPE_KBLOCK) ||
2427 (pr->type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) ||
2428 (pr->type == GNUNET_DATASTORE_BLOCKTYPE_NBLOCK) )
2433 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
2438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2439 "New local response `%s', adding to filter.\n",
2440 GNUNET_h2s (&mhash));
2443 /* this would break stuff since we will check the bf later
2444 again (and would then discard the reply!) */
2445 GNUNET_CONTAINER_bloomfilter_add (pr->bf,
2449 memset (&prq, 0, sizeof (prq));
2451 prq.expiration = expiration;
2453 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) &&
2454 (GNUNET_OK != check_sblock ((const struct SBlock*) data,
2460 /* FIXME: consider removing the block? */
2461 GNUNET_FS_drq_get_next (GNUNET_YES);
2465 prq.priority = priority;
2466 process_reply (&prq, key, pr);
2468 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK) ||
2469 (type == GNUNET_DATASTORE_BLOCKTYPE_IBLOCK) )
2471 GNUNET_FS_drq_get_next (GNUNET_NO);
2474 if ( (pr->client_request_list == NULL) &&
2475 ( (GNUNET_YES == test_load_too_high()) ||
2476 (pr->results_found > 5 + 2 * pr->priority) ) )
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2480 "Load too high, done with request\n");
2482 GNUNET_STATISTICS_update (stats,
2483 gettext_noop ("# processing result set cut short due to load"),
2486 GNUNET_FS_drq_get_next (GNUNET_NO);
2489 GNUNET_FS_drq_get_next (GNUNET_YES);
2494 * We've received a request with the specified priority. Bound it
2495 * according to how much we trust the given peer.
2497 * @param prio_in requested priority
2498 * @param cp the peer making the request
2499 * @return effective priority
2502 bound_priority (uint32_t prio_in,
2503 struct ConnectedPeer *cp)
2510 * Iterator over entries in the 'query_request_map' that
2511 * tries to see if we have the same request pending from
2512 * the same peer already.
2514 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
2515 * @param key current key code (query, ignored, must match)
2516 * @param value value in the hash map (a 'struct PendingRequest'
2517 * that already exists)
2518 * @return GNUNET_YES if we should continue to
2519 * iterate (no match yet)
2520 * GNUNET_NO if not (match found).
2523 check_duplicate_request_peer (void *cls,
2524 const GNUNET_HashCode * key,
2527 struct CheckDuplicateRequestClosure *cdc = cls;
2528 struct PendingRequest *have = value;
2530 if (cdc->pr->target_pid == have->target_pid)
2540 * Handle P2P "GET" request.
2542 * @param cls closure, always NULL
2543 * @param other the other peer involved (sender or receiver, NULL
2544 * for loopback messages where we are both sender and receiver)
2545 * @param message the actual message
2546 * @param latency reported latency of the connection with 'other'
2547 * @param distance reported distance (DV) to 'other'
2548 * @return GNUNET_OK to keep the connection open,
2549 * GNUNET_SYSERR to close it (signal serious error)
2552 handle_p2p_get (void *cls,
2553 const struct GNUNET_PeerIdentity *other,
2554 const struct GNUNET_MessageHeader *message,
2555 struct GNUNET_TIME_Relative latency,
2558 struct PendingRequest *pr;
2559 struct ConnectedPeer *cp;
2560 struct ConnectedPeer *cps;
2561 struct CheckDuplicateRequestClosure cdc;
2562 struct GNUNET_TIME_Relative timeout;
2564 const struct GetMessage *gm;
2566 const GNUNET_HashCode *opt;
2569 uint32_t ttl_decrement;
2574 msize = ntohs(message->size);
2575 if (msize < sizeof (struct GetMessage))
2577 GNUNET_break_op (0);
2578 return GNUNET_SYSERR;
2580 gm = (const struct GetMessage*) message;
2581 type = ntohl (gm->type);
2584 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
2585 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2586 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2587 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2588 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2591 GNUNET_break_op (0);
2592 return GNUNET_SYSERR;
2594 bm = ntohl (gm->hash_bitmap);
2602 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
2604 GNUNET_break_op (0);
2605 return GNUNET_SYSERR;
2607 opt = (const GNUNET_HashCode*) &gm[1];
2608 bfsize = msize - sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode);
2609 bm = ntohl (gm->hash_bitmap);
2610 if ( (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) &&
2611 (type != GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) )
2613 GNUNET_break_op (0);
2614 return GNUNET_SYSERR;
2617 cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2618 &other->hashPubKey);
2621 /* peer must have just disconnected */
2622 GNUNET_STATISTICS_update (stats,
2623 gettext_noop ("# requests dropped due to initiator not being connected"),
2626 return GNUNET_SYSERR;
2628 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2629 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2636 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
2637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2638 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
2639 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
2642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2643 "Failed to find peer `%4s' in connection set. Dropping query.\n",
2644 GNUNET_i2s (other));
2646 GNUNET_STATISTICS_update (stats,
2647 gettext_noop ("# requests dropped due to missing reverse route"),
2650 /* FIXME: try connect? */
2653 /* note that we can really only check load here since otherwise
2654 peers could find out that we are overloaded by not being
2655 disconnected after sending us a malformed query... */
2656 if (GNUNET_YES == test_load_too_high ())
2659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2660 "Dropping query from `%s', this peer is too busy.\n",
2661 GNUNET_i2s (other));
2663 GNUNET_STATISTICS_update (stats,
2664 gettext_noop ("# requests dropped due to high load"),
2671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2672 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
2673 GNUNET_h2s (&gm->query),
2674 (unsigned int) type,
2678 have_ns = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE));
2679 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2680 (have_ns ? sizeof(GNUNET_HashCode) : 0));
2682 pr->namespace = (GNUNET_HashCode*) &pr[1];
2684 pr->mingle = ntohl (gm->filter_mutator);
2685 if (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE))
2686 memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
2687 if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
2688 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
2690 pr->anonymity_level = 1;
2691 pr->priority = bound_priority (ntohl (gm->priority), cps);
2692 pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
2693 pr->query = gm->query;
2694 /* decrement ttl (always) */
2695 ttl_decrement = 2 * TTL_DECREMENT +
2696 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2698 if ( (pr->ttl < 0) &&
2699 (((int32_t)(pr->ttl - ttl_decrement)) > 0) )
2702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2703 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
2708 GNUNET_STATISTICS_update (stats,
2709 gettext_noop ("# requests dropped due TTL underflow"),
2712 /* integer underflow => drop (should be very rare)! */
2716 pr->ttl -= ttl_decrement;
2717 pr->start_time = GNUNET_TIME_absolute_get ();
2719 /* get bloom filter */
2722 pr->bf = GNUNET_CONTAINER_bloomfilter_init ((const char*) &opt[bits],
2725 pr->bf_size = bfsize;
2730 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
2732 &check_duplicate_request_peer,
2734 if (cdc.have != NULL)
2736 if (cdc.have->start_time.value + cdc.have->ttl >=
2737 pr->start_time.value + pr->ttl)
2739 /* existing request has higher TTL, drop new one! */
2740 cdc.have->priority += pr->priority;
2741 destroy_pending_request (pr);
2743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2744 "Have existing request with higher TTL, dropping new request.\n",
2745 GNUNET_i2s (other));
2747 GNUNET_STATISTICS_update (stats,
2748 gettext_noop ("# requests dropped due to higher-TTL request"),
2755 /* existing request has lower TTL, drop old one! */
2756 pr->priority += cdc.have->priority;
2757 /* Possible optimization: if we have applicable pending
2758 replies in 'cdc.have', we might want to move those over
2759 (this is a really rare special-case, so it is not clear
2760 that this would be worth it) */
2761 destroy_pending_request (cdc.have);
2762 /* keep processing 'pr'! */
2767 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2770 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2771 GNUNET_CONTAINER_multihashmap_put (peer_request_map,
2774 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2776 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
2778 pr->start_time.value + pr->ttl);
2780 GNUNET_STATISTICS_update (stats,
2781 gettext_noop ("# P2P searches received"),
2784 GNUNET_STATISTICS_update (stats,
2785 gettext_noop ("# P2P searches active"),
2789 /* calculate change in traffic preference */
2790 preference = (double) pr->priority;
2791 if (preference < QUERY_BANDWIDTH_VALUE)
2792 preference = QUERY_BANDWIDTH_VALUE;
2793 cps->inc_preference += preference;
2795 /* process locally */
2796 if (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK)
2797 type = GNUNET_DATASTORE_BLOCKTYPE_ANY; /* to get on-demand as well */
2798 timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
2799 (pr->priority + 1));
2800 pr->drq = GNUNET_FS_drq_get (&gm->query,
2802 &process_local_reply,
2807 /* Are multiple results possible? If so, start processing remotely now! */
2810 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2811 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2812 /* only one result, wait for datastore */
2815 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2816 pr->task = GNUNET_SCHEDULER_add_now (sched,
2817 &forward_request_task,
2821 /* make sure we don't track too many requests */
2822 if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
2824 pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
2825 destroy_pending_request (pr);
2831 /* **************************** CS GET Handling ************************ */
2835 * Handle START_SEARCH-message (search request from client).
2837 * @param cls closure
2838 * @param client identification of the client
2839 * @param message the actual message
2842 handle_start_search (void *cls,
2843 struct GNUNET_SERVER_Client *client,
2844 const struct GNUNET_MessageHeader *message)
2846 static GNUNET_HashCode all_zeros;
2847 const struct SearchMessage *sm;
2848 struct ClientList *cl;
2849 struct ClientRequestList *crl;
2850 struct PendingRequest *pr;
2855 msize = ntohs (message->size);
2856 if ( (msize < sizeof (struct SearchMessage)) ||
2857 (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
2860 GNUNET_SERVER_receive_done (client,
2864 GNUNET_STATISTICS_update (stats,
2865 gettext_noop ("# client searches received"),
2868 sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
2869 sm = (const struct SearchMessage*) message;
2870 type = ntohl (sm->type);
2872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2873 "Received request for `%s' of type %u from local client\n",
2874 GNUNET_h2s (&sm->query),
2875 (unsigned int) type);
2879 case GNUNET_DATASTORE_BLOCKTYPE_ANY:
2880 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2881 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2882 case GNUNET_DATASTORE_BLOCKTYPE_KBLOCK:
2883 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2884 case GNUNET_DATASTORE_BLOCKTYPE_NBLOCK:
2888 GNUNET_SERVER_receive_done (client,
2894 while ( (cl != NULL) &&
2895 (cl->client != client) )
2899 cl = GNUNET_malloc (sizeof (struct ClientList));
2900 cl->client = client;
2901 GNUNET_SERVER_client_keep (client);
2902 cl->next = client_list;
2905 /* detect duplicate KBLOCK requests */
2906 if ( (type == GNUNET_DATASTORE_BLOCKTYPE_KBLOCK) ||
2907 (type == GNUNET_DATASTORE_BLOCKTYPE_NBLOCK) ||
2908 (type == GNUNET_DATASTORE_BLOCKTYPE_ANY) )
2911 while ( (crl != NULL) &&
2912 ( (0 != memcmp (&crl->req->query,
2914 sizeof (GNUNET_HashCode))) ||
2915 (crl->req->type != type) ) )
2920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2921 "Have existing request, merging content-seen lists.\n");
2924 /* Duplicate request (used to send long list of
2925 known/blocked results); merge 'pr->replies_seen'
2926 and update bloom filter */
2927 GNUNET_array_grow (pr->replies_seen,
2928 pr->replies_seen_size,
2929 pr->replies_seen_off + sc);
2930 memcpy (&pr->replies_seen[pr->replies_seen_off],
2932 sc * sizeof (GNUNET_HashCode));
2933 pr->replies_seen_off += sc;
2935 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2936 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2940 GNUNET_STATISTICS_update (stats,
2941 gettext_noop ("# client searches updated (merged content seen list)"),
2944 GNUNET_SERVER_receive_done (client,
2949 GNUNET_STATISTICS_update (stats,
2950 gettext_noop ("# client searches active"),
2953 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
2954 ((type == GNUNET_DATASTORE_BLOCKTYPE_SBLOCK) ? sizeof(GNUNET_HashCode) : 0));
2955 crl = GNUNET_malloc (sizeof (struct ClientRequestList));
2956 memset (crl, 0, sizeof (struct ClientRequestList));
2957 crl->client_list = cl;
2958 GNUNET_CONTAINER_DLL_insert (cl->rl_head,
2963 pr->client_request_list = crl;
2964 GNUNET_array_grow (pr->replies_seen,
2965 pr->replies_seen_size,
2967 memcpy (pr->replies_seen,
2969 sc * sizeof (GNUNET_HashCode));
2970 pr->replies_seen_off = sc;
2971 pr->anonymity_level = ntohl (sm->anonymity_level);
2972 pr->bf = refresh_bloomfilter (pr->replies_seen_off,
2976 pr->query = sm->query;
2979 case GNUNET_DATASTORE_BLOCKTYPE_DBLOCK:
2980 case GNUNET_DATASTORE_BLOCKTYPE_IBLOCK:
2981 if (0 != memcmp (&sm->target,
2983 sizeof (GNUNET_HashCode)))
2984 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
2986 case GNUNET_DATASTORE_BLOCKTYPE_SBLOCK:
2987 pr->namespace = (GNUNET_HashCode*) &pr[1];
2988 memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
2993 GNUNET_CONTAINER_multihashmap_put (query_request_map,
2996 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2997 if (type == GNUNET_DATASTORE_BLOCKTYPE_DBLOCK)
2998 type = GNUNET_DATASTORE_BLOCKTYPE_ANY; /* get on-demand blocks too! */
2999 pr->drq = GNUNET_FS_drq_get (&sm->query,
3001 &process_local_reply,
3003 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
3008 /* **************************** Startup ************************ */
3012 * List of handlers for P2P messages
3013 * that we care about.
3015 static struct GNUNET_CORE_MessageHandler p2p_handlers[] =
3018 GNUNET_MESSAGE_TYPE_FS_GET, 0 },
3020 GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
3026 * List of handlers for the messages understood by this
3029 static struct GNUNET_SERVER_MessageHandler handlers[] = {
3030 {&GNUNET_FS_handle_index_start, NULL,
3031 GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
3032 {&GNUNET_FS_handle_index_list_get, NULL,
3033 GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
3034 {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
3035 sizeof (struct UnindexMessage) },
3036 {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
3043 * Process fs requests.
3045 * @param s scheduler to use
3046 * @param server the initialized server
3047 * @param c configuration to use
3050 main_init (struct GNUNET_SCHEDULER_Handle *s,
3051 struct GNUNET_SERVER_Handle *server,
3052 const struct GNUNET_CONFIGURATION_Handle *c)
3056 stats = GNUNET_STATISTICS_create (sched, "fs", cfg);
3057 connected_peers = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3058 query_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3059 peer_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
3060 requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3061 core = GNUNET_CORE_connect (sched,
3063 GNUNET_TIME_UNIT_FOREVER_REL,
3067 &peer_connect_handler,
3068 &peer_disconnect_handler,
3074 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3075 _("Failed to connect to `%s' service.\n"),
3077 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
3078 connected_peers = NULL;
3079 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
3080 query_request_map = NULL;
3081 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
3082 requests_by_expiration_heap = NULL;
3083 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
3084 peer_request_map = NULL;
3086 return GNUNET_SYSERR;
3088 GNUNET_SERVER_disconnect_notify (server,
3089 &handle_client_disconnect,
3091 GNUNET_SERVER_add_handlers (server, handlers);
3092 GNUNET_SCHEDULER_add_delayed (sched,
3093 GNUNET_TIME_UNIT_FOREVER_REL,
3101 * Process fs requests.
3103 * @param cls closure
3104 * @param sched scheduler to use
3105 * @param server the initialized server
3106 * @param cfg configuration to use
3110 struct GNUNET_SCHEDULER_Handle *sched,
3111 struct GNUNET_SERVER_Handle *server,
3112 const struct GNUNET_CONFIGURATION_Handle *cfg)
3114 if ( (GNUNET_OK != GNUNET_FS_drq_init (sched, cfg)) ||
3115 (GNUNET_OK != GNUNET_FS_indexing_init (sched, cfg)) ||
3116 (GNUNET_OK != main_init (sched, server, cfg)) )
3118 GNUNET_SCHEDULER_shutdown (sched);
3125 * The main function for the fs service.
3127 * @param argc number of arguments from the command line
3128 * @param argv command line arguments
3129 * @return 0 ok, 1 on error
3132 main (int argc, char *const *argv)
3134 return (GNUNET_OK ==
3135 GNUNET_SERVICE_run (argc,
3138 GNUNET_SERVICE_OPTION_NONE,
3139 &run, NULL)) ? 0 : 1;
3142 /* end of gnunet-service-fs.c */