2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file fs/gnunet-service-fs_cp.c
23 * @brief API to handle 'connected peers'
24 * @author Christian Grothoff
27 #include "gnunet_load_lib.h"
28 #include "gnunet-service-fs.h"
29 #include "gnunet-service-fs_cp.h"
30 #include "gnunet-service-fs_pe.h"
31 #include "gnunet-service-fs_pr.h"
32 #include "gnunet-service-fs_push.h"
35 * How often do we flush trust values to disk?
37 #define TRUST_FLUSH_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
40 * After how long do we discard a reply?
42 #define REPLY_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 2)
46 * Handle to cancel a transmission request.
48 struct GSF_PeerTransmitHandle
52 * Kept in a doubly-linked list.
54 struct GSF_PeerTransmitHandle *next;
57 * Kept in a doubly-linked list.
59 struct GSF_PeerTransmitHandle *prev;
62 * Handle for an active request for transmission to this
63 * peer, or NULL (if core queue was full).
65 struct GNUNET_CORE_TransmitHandle *cth;
68 * Time when this transmission request was issued.
70 struct GNUNET_TIME_Absolute transmission_request_start_time;
73 * Timeout for this request.
75 struct GNUNET_TIME_Absolute timeout;
78 * Task called on timeout, or 0 for none.
80 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
83 * Function to call to get the actual message.
85 GSF_GetMessageCallback gmc;
88 * Peer this request targets.
90 struct GSF_ConnectedPeer *cp;
98 * Size of the message to be transmitted.
103 * Set to 1 if we're currently in the process of calling
104 * 'GNUNET_CORE_notify_transmit_ready' (so while cth is
105 * NULL, we should not call notify_transmit_ready for this
108 unsigned int cth_in_progress;
111 * GNUNET_YES if this is a query, GNUNET_NO for content.
116 * Did we get a reservation already?
121 * Priority of this request.
129 * Information per peer and request.
135 * Handle to generic request.
137 struct GSF_PendingRequest *pr;
140 * Handle to specific peer.
142 struct GSF_ConnectedPeer *cp;
145 * Task for asynchronous stopping of this request.
147 GNUNET_SCHEDULER_TaskIdentifier kill_task;
155 struct GSF_ConnectedPeer
159 * Performance data for this peer.
161 struct GSF_PeerPerformanceData ppd;
164 * Time until when we blocked this peer from migrating
167 struct GNUNET_TIME_Absolute last_migration_block;
170 * Task scheduled to revive migration to this peer.
172 GNUNET_SCHEDULER_TaskIdentifier mig_revive_task;
175 * Messages (replies, queries, content migration) we would like to
176 * send to this peer in the near future. Sorted by priority, head.
178 struct GSF_PeerTransmitHandle *pth_head;
181 * Messages (replies, queries, content migration) we would like to
182 * send to this peer in the near future. Sorted by priority, tail.
184 struct GSF_PeerTransmitHandle *pth_tail;
187 * Migration stop message in our queue, or NULL if we have none pending.
189 struct GSF_PeerTransmitHandle *migration_pth;
192 * Context of our GNUNET_CORE_peer_change_preference call (or NULL).
194 struct GNUNET_CORE_InformationRequestContext *irc;
197 * Task scheduled if we need to retry bandwidth reservation later.
199 GNUNET_SCHEDULER_TaskIdentifier irc_delay_task;
202 * Active requests from this neighbour, map of query to 'struct PeerRequest'.
204 struct GNUNET_CONTAINER_MultiHashMap *request_map;
207 * Increase in traffic preference still to be submitted
208 * to the core service for this peer.
210 uint64_t inc_preference;
213 * Trust rating for this peer on disk.
218 * Which offset in "last_p2p_replies" will be updated next?
219 * (we go round-robin).
221 unsigned int last_p2p_replies_woff;
224 * Which offset in "last_client_replies" will be updated next?
225 * (we go round-robin).
227 unsigned int last_client_replies_woff;
230 * Current offset into 'last_request_times' ring buffer.
232 unsigned int last_request_times_off;
235 * GNUNET_YES if we did successfully reserve 32k bandwidth,
244 * Map from peer identities to 'struct GSF_ConnectPeer' entries.
246 static struct GNUNET_CONTAINER_MultiHashMap *cp_map;
249 * Where do we store trust information?
251 static char *trustDirectory;
255 * Get the filename under which we would store the GNUNET_HELLO_Message
256 * for the given host and protocol.
257 * @return filename of the form DIRECTORY/HOSTID
260 get_trust_filename (const struct GNUNET_PeerIdentity *id)
262 struct GNUNET_CRYPTO_HashAsciiEncoded fil;
265 GNUNET_CRYPTO_hash_to_enc (&id->hashPubKey, &fil);
266 GNUNET_asprintf (&fn, "%s%s%s", trustDirectory, DIR_SEPARATOR_STR, &fil);
272 * Find latency information in 'atsi'.
274 * @param atsi performance data
275 * @return connection latency
277 static struct GNUNET_TIME_Relative
278 get_latency (const struct GNUNET_TRANSPORT_ATS_Information *atsi)
281 return GNUNET_TIME_UNIT_SECONDS;
282 while ( (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) &&
283 (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY) )
285 if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR)
288 /* how can we not have latency data? */
289 return GNUNET_TIME_UNIT_SECONDS;
291 return GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
292 ntohl (atsi->value));
297 * Update the performance information kept for the given peer.
299 * @param cp peer record to update
300 * @param atsi transport performance data
303 update_atsi (struct GSF_ConnectedPeer *cp,
304 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
306 struct GNUNET_TIME_Relative latency;
308 latency = get_latency (atsi);
309 GNUNET_LOAD_value_set_decline (cp->ppd.transmission_delay,
311 /* LATER: merge atsi into cp's performance data (if we ever care...) */
316 * Return the performance data record for the given peer
318 * @param cp peer to query
319 * @return performance data record for the peer
321 struct GSF_PeerPerformanceData *
322 GSF_get_peer_performance_data_ (struct GSF_ConnectedPeer *cp)
329 * Core is ready to transmit to a peer, get the message.
331 * @param cls the 'struct GSF_PeerTransmitHandle' of the message
332 * @param size number of bytes core is willing to take
333 * @param buf where to copy the message
334 * @return number of bytes copied to buf
337 peer_transmit_ready_cb (void *cls,
345 * Function called by core upon success or failure of our bandwidth reservation request.
347 * @param cls the 'struct GSF_ConnectedPeer' of the peer for which we made the request
348 * @param peer identifies the peer
349 * @param bandwidth_out available amount of outbound bandwidth
350 * @param amount set to the amount that was actually reserved or unreserved;
351 * either the full requested amount or zero (no partial reservations)
352 * @param res_delay if the reservation could not be satisfied (amount was 0), how
353 * long should the client wait until re-trying?
354 * @param preference current traffic preference for the given peer
357 core_reserve_callback (void *cls,
358 const struct GNUNET_PeerIdentity *peer,
359 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
361 struct GNUNET_TIME_Relative res_delay,
362 uint64_t preference);
366 * If ready (bandwidth reserved), try to schedule transmission via
367 * core for the given handle.
369 * @param pth transmission handle to schedule
372 schedule_transmission (struct GSF_PeerTransmitHandle *pth)
374 struct GSF_ConnectedPeer *cp;
375 struct GNUNET_PeerIdentity target;
378 if ( (NULL != pth->cth) ||
379 (0 != pth->cth_in_progress) )
380 return; /* already done */
382 GNUNET_PEER_resolve (cp->ppd.pid,
384 if ( (GNUNET_YES == pth->is_query) &&
385 (GNUNET_YES != pth->was_reserved) )
387 /* query, need reservation */
388 if (GNUNET_YES != cp->did_reserve)
389 return; /* not ready */
390 cp->did_reserve = GNUNET_NO;
391 /* reservation already done! */
392 pth->was_reserved = GNUNET_YES;
393 ip = cp->inc_preference;
394 cp->inc_preference = 0;
395 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
397 GNUNET_TIME_UNIT_FOREVER_REL,
398 GNUNET_BANDWIDTH_VALUE_MAX,
401 &core_reserve_callback,
404 GNUNET_assert (pth->cth == NULL);
405 pth->cth_in_progress++;
406 pth->cth = GNUNET_CORE_notify_transmit_ready (GSF_core,
409 GNUNET_TIME_absolute_get_remaining (pth->timeout),
412 &peer_transmit_ready_cb,
414 GNUNET_assert (0 < pth->cth_in_progress--);
419 * Core is ready to transmit to a peer, get the message.
421 * @param cls the 'struct GSF_PeerTransmitHandle' of the message
422 * @param size number of bytes core is willing to take
423 * @param buf where to copy the message
424 * @return number of bytes copied to buf
427 peer_transmit_ready_cb (void *cls,
431 struct GSF_PeerTransmitHandle *pth = cls;
432 struct GSF_PeerTransmitHandle *pos;
433 struct GSF_ConnectedPeer *cp;
436 GNUNET_assert ( (NULL == buf) ||
437 (pth->size <= size) );
439 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
441 GNUNET_SCHEDULER_cancel (pth->timeout_task);
442 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
445 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
448 if (GNUNET_YES == pth->is_query)
450 cp->ppd.last_request_times[(cp->last_request_times_off++) % MAX_QUEUE_PER_PEER] = GNUNET_TIME_absolute_get ();
451 GNUNET_assert (0 < cp->ppd.pending_queries--);
453 else if (GNUNET_NO == pth->is_query)
455 GNUNET_assert (0 < cp->ppd.pending_replies--);
457 GNUNET_LOAD_update (cp->ppd.transmission_delay,
458 GNUNET_TIME_absolute_get_duration (pth->transmission_request_start_time).rel_value);
459 ret = pth->gmc (pth->gmc_cls,
461 GNUNET_assert (NULL == pth->cth);
462 for (pos = cp->pth_head; pos != NULL; pos = pos->next)
464 GNUNET_assert (pos != pth);
465 schedule_transmission (pos);
467 GNUNET_assert (pth->cth == NULL);
468 GNUNET_assert (pth->cth_in_progress == 0);
475 * (re)try to reserve bandwidth from the given peer.
477 * @param cls the 'struct GSF_ConnectedPeer' to reserve from
478 * @param tc scheduler context
481 retry_reservation (void *cls,
482 const struct GNUNET_SCHEDULER_TaskContext *tc)
484 struct GSF_ConnectedPeer *cp = cls;
486 struct GNUNET_PeerIdentity target;
488 GNUNET_PEER_resolve (cp->ppd.pid,
490 cp->irc_delay_task = GNUNET_SCHEDULER_NO_TASK;
491 ip = cp->inc_preference;
492 cp->inc_preference = 0;
493 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
495 GNUNET_TIME_UNIT_FOREVER_REL,
496 GNUNET_BANDWIDTH_VALUE_MAX,
499 &core_reserve_callback,
505 * Function called by core upon success or failure of our bandwidth reservation request.
507 * @param cls the 'struct GSF_ConnectedPeer' of the peer for which we made the request
508 * @param peer identifies the peer
509 * @param bandwidth_out available amount of outbound bandwidth
510 * @param amount set to the amount that was actually reserved or unreserved;
511 * either the full requested amount or zero (no partial reservations)
512 * @param res_delay if the reservation could not be satisfied (amount was 0), how
513 * long should the client wait until re-trying?
514 * @param preference current traffic preference for the given peer
517 core_reserve_callback (void *cls,
518 const struct GNUNET_PeerIdentity *peer,
519 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
521 struct GNUNET_TIME_Relative res_delay,
524 struct GSF_ConnectedPeer *cp = cls;
525 struct GSF_PeerTransmitHandle *pth;
530 cp->irc_delay_task = GNUNET_SCHEDULER_add_delayed (res_delay,
535 cp->did_reserve = GNUNET_YES;
537 if ( (NULL != pth) &&
540 /* reservation success, try transmission now! */
541 pth->cth_in_progress++;
542 pth->cth = GNUNET_CORE_notify_transmit_ready (GSF_core,
545 GNUNET_TIME_absolute_get_remaining (pth->timeout),
548 &peer_transmit_ready_cb,
550 GNUNET_assert (0 < pth->cth_in_progress--);
556 * A peer connected to us. Setup the connected peer
559 * @param peer identity of peer that connected
560 * @param atsi performance data for the connection
561 * @return handle to connected peer entry
563 struct GSF_ConnectedPeer *
564 GSF_peer_connect_handler_ (const struct GNUNET_PeerIdentity *peer,
565 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
567 struct GSF_ConnectedPeer *cp;
571 cp = GNUNET_malloc (sizeof (struct GSF_ConnectedPeer));
572 cp->ppd.pid = GNUNET_PEER_intern (peer);
573 cp->ppd.transmission_delay = GNUNET_LOAD_value_init (GNUNET_TIME_UNIT_ZERO);
574 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
576 GNUNET_TIME_UNIT_FOREVER_REL,
577 GNUNET_BANDWIDTH_VALUE_MAX,
580 &core_reserve_callback,
582 fn = get_trust_filename (peer);
583 if ((GNUNET_DISK_file_test (fn) == GNUNET_YES) &&
584 (sizeof (trust) == GNUNET_DISK_fn_read (fn, &trust, sizeof (trust))))
585 cp->disk_trust = cp->ppd.trust = ntohl (trust);
587 cp->request_map = GNUNET_CONTAINER_multihashmap_create (128);
588 GNUNET_break (GNUNET_OK ==
589 GNUNET_CONTAINER_multihashmap_put (cp_map,
592 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
593 update_atsi (cp, atsi);
594 GSF_push_start_ (cp);
600 * It may be time to re-start migrating content to this
601 * peer. Check, and if so, restart migration.
603 * @param cls the 'struct GSF_ConnectedPeer'
604 * @param tc scheduler context
607 revive_migration (void *cls,
608 const struct GNUNET_SCHEDULER_TaskContext *tc)
610 struct GSF_ConnectedPeer *cp = cls;
611 struct GNUNET_TIME_Relative bt;
613 cp->mig_revive_task = GNUNET_SCHEDULER_NO_TASK;
614 bt = GNUNET_TIME_absolute_get_remaining (cp->ppd.migration_blocked_until);
615 if (0 != bt.rel_value)
617 /* still time left... */
619 = GNUNET_SCHEDULER_add_delayed (bt,
624 GSF_push_start_ (cp);
629 * Get a handle for a connected peer.
631 * @param peer peer's identity
632 * @return NULL if the peer is not currently connected
634 struct GSF_ConnectedPeer *
635 GSF_peer_get_ (const struct GNUNET_PeerIdentity *peer)
637 return GNUNET_CONTAINER_multihashmap_get (cp_map,
643 * Handle P2P "MIGRATION_STOP" message.
645 * @param cls closure, always NULL
646 * @param other the other peer involved (sender or receiver, NULL
647 * for loopback messages where we are both sender and receiver)
648 * @param message the actual message
649 * @param atsi performance information
650 * @return GNUNET_OK to keep the connection open,
651 * GNUNET_SYSERR to close it (signal serious error)
654 GSF_handle_p2p_migration_stop_ (void *cls,
655 const struct GNUNET_PeerIdentity *other,
656 const struct GNUNET_MessageHeader *message,
657 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
659 struct GSF_ConnectedPeer *cp;
660 const struct MigrationStopMessage *msm;
661 struct GNUNET_TIME_Relative bt;
663 msm = (const struct MigrationStopMessage*) message;
664 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
671 bt = GNUNET_TIME_relative_ntoh (msm->duration);
672 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
673 _("Migration of content to peer `%s' blocked for %llu ms\n"),
675 (unsigned long long) bt.rel_value);
676 cp->ppd.migration_blocked_until = GNUNET_TIME_relative_to_absolute (bt);
677 if (cp->mig_revive_task == GNUNET_SCHEDULER_NO_TASK)
681 = GNUNET_SCHEDULER_add_delayed (bt,
685 update_atsi (cp, atsi);
691 * Copy reply and free put message.
693 * @param cls the 'struct PutMessage'
694 * @param buf_size number of bytes available in buf
695 * @param buf where to copy the message, NULL on error (peer disconnect)
696 * @return number of bytes copied to 'buf', can be 0 (without indicating an error)
699 copy_reply (void *cls,
703 struct PutMessage *pm = cls;
708 GNUNET_assert (buf_size >= ntohs (pm->header.size));
709 size = ntohs (pm->header.size);
710 memcpy (buf, pm, size);
711 GNUNET_STATISTICS_update (GSF_stats,
712 gettext_noop ("# replies transmitted to other peers"),
719 GNUNET_STATISTICS_update (GSF_stats,
720 gettext_noop ("# replies dropped"),
730 * Free the given request.
732 * @param cls the request to free
733 * @param tc task context
736 peer_request_destroy (void *cls,
737 const struct GNUNET_SCHEDULER_TaskContext *tc)
739 struct PeerRequest *peerreq = cls;
740 struct GSF_PendingRequest *pr = peerreq->pr;
741 struct GSF_ConnectedPeer *cp = peerreq->cp;
742 struct GSF_PendingRequestData *prd;
744 peerreq->kill_task = GNUNET_SCHEDULER_NO_TASK;
745 prd = GSF_pending_request_get_data_ (pr);
746 GNUNET_STATISTICS_update (GSF_stats,
747 gettext_noop ("# P2P searches active"),
750 GNUNET_break (GNUNET_OK ==
751 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
754 GSF_pending_request_cancel_ (pr);
755 GNUNET_free (peerreq);
760 * Handle a reply to a pending request. Also called if a request
761 * expires (then with data == NULL). The handler may be called
762 * many times (depending on the request type), but will not be
763 * called during or after a call to GSF_pending_request_cancel
764 * and will also not be called anymore after a call signalling
767 * @param cls 'struct PeerRequest' this is an answer for
768 * @param eval evaluation of the result
769 * @param pr handle to the original pending request
770 * @param expiration when does 'data' expire?
771 * @param type type of the block
772 * @param data response data, NULL on request expiration
773 * @param data_len number of bytes in data
776 handle_p2p_reply (void *cls,
777 enum GNUNET_BLOCK_EvaluationResult eval,
778 struct GSF_PendingRequest *pr,
779 struct GNUNET_TIME_Absolute expiration,
780 enum GNUNET_BLOCK_Type type,
784 struct PeerRequest *peerreq = cls;
785 struct GSF_ConnectedPeer *cp = peerreq->cp;
786 struct GSF_PendingRequestData *prd;
787 struct PutMessage *pm;
790 GNUNET_assert (data_len + sizeof (struct PutMessage) < GNUNET_SERVER_MAX_MESSAGE_SIZE);
791 GNUNET_assert (peerreq->pr == pr);
792 prd = GSF_pending_request_get_data_ (pr);
795 GNUNET_STATISTICS_update (GSF_stats,
796 gettext_noop ("# P2P searches active"),
799 GNUNET_break (GNUNET_OK ==
800 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
803 GNUNET_free (peerreq);
806 GNUNET_break (type != GNUNET_BLOCK_TYPE_ANY);
807 if ( (prd->type != type) &&
808 (prd->type != GNUNET_BLOCK_TYPE_ANY) )
814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
815 "Transmitting result for query `%s' to peer\n",
816 GNUNET_h2s (&prd->query));
818 GNUNET_STATISTICS_update (GSF_stats,
819 gettext_noop ("# replies received for other peers"),
822 msize = sizeof (struct PutMessage) + data_len;
823 if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
828 pm = GNUNET_malloc (msize);
829 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
830 pm->header.size = htons (msize);
831 pm->type = htonl (type);
832 pm->expiration = GNUNET_TIME_absolute_hton (expiration);
833 memcpy (&pm[1], data, data_len);
834 (void) GSF_peer_transmit_ (cp, GNUNET_NO,
840 if (eval != GNUNET_BLOCK_EVALUATION_OK_LAST)
842 if (GNUNET_SCHEDULER_NO_TASK == peerreq->kill_task)
843 peerreq->kill_task = GNUNET_SCHEDULER_add_now (&peer_request_destroy,
849 * Increase the host credit by a value.
851 * @param cp which peer to change the trust value on
852 * @param value is the int value by which the
853 * host credit is to be increased or decreased
854 * @returns the actual change in trust (positive or negative)
857 change_host_trust (struct GSF_ConnectedPeer *cp, int value)
861 GNUNET_assert (cp != NULL);
864 if (cp->ppd.trust + value < cp->ppd.trust)
866 value = UINT32_MAX - cp->ppd.trust;
867 cp->ppd.trust = UINT32_MAX;
870 cp->ppd.trust += value;
874 if (cp->ppd.trust < -value)
876 value = -cp->ppd.trust;
880 cp->ppd.trust += value;
887 * We've received a request with the specified priority. Bound it
888 * according to how much we trust the given peer.
890 * @param prio_in requested priority
891 * @param cp the peer making the request
892 * @return effective priority
895 bound_priority (uint32_t prio_in,
896 struct GSF_ConnectedPeer *cp)
898 #define N ((double)128.0)
903 ld = GSF_test_get_load_too_high_ (0);
904 if (ld == GNUNET_SYSERR)
906 GNUNET_STATISTICS_update (GSF_stats,
907 gettext_noop ("# requests done for free (low load)"),
910 return 0; /* excess resources */
912 if (prio_in > INT32_MAX)
914 ret = - change_host_trust (cp, - (int) prio_in);
917 if (ret > GSF_current_priorities + N)
918 rret = GSF_current_priorities + N;
921 GSF_current_priorities
922 = (GSF_current_priorities * (N-1) + rret)/N;
924 if ( (ld == GNUNET_YES) && (ret > 0) )
926 /* try with charging */
927 ld = GSF_test_get_load_too_high_ (ret);
929 if (ld == GNUNET_YES)
931 GNUNET_STATISTICS_update (GSF_stats,
932 gettext_noop ("# request dropped, priority insufficient"),
936 change_host_trust (cp, (int) ret);
937 return -1; /* not enough resources */
941 GNUNET_STATISTICS_update (GSF_stats,
942 gettext_noop ("# requests done for a price (normal load)"),
952 * The priority level imposes a bound on the maximum
953 * value for the ttl that can be requested.
955 * @param ttl_in requested ttl
956 * @param prio given priority
957 * @return ttl_in if ttl_in is below the limit,
958 * otherwise the ttl-limit for the given priority
961 bound_ttl (int32_t ttl_in, uint32_t prio)
963 unsigned long long allowed;
967 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
968 if (ttl_in > allowed)
970 if (allowed >= (1 << 30))
979 * Handle P2P "QUERY" message. Creates the pending request entry
980 * and sets up all of the data structures to that we will
981 * process replies properly. Does not initiate forwarding or
982 * local database lookups.
984 * @param other the other peer involved (sender or receiver, NULL
985 * for loopback messages where we are both sender and receiver)
986 * @param message the actual message
987 * @return pending request handle, NULL on error
989 struct GSF_PendingRequest *
990 GSF_handle_p2p_query_ (const struct GNUNET_PeerIdentity *other,
991 const struct GNUNET_MessageHeader *message)
993 struct PeerRequest *peerreq;
994 struct GSF_PendingRequest *pr;
995 struct GSF_PendingRequestData *prd;
996 struct GSF_ConnectedPeer *cp;
997 struct GSF_ConnectedPeer *cps;
998 const GNUNET_HashCode *namespace;
999 const struct GNUNET_PeerIdentity *target;
1000 enum GSF_PendingRequestOptions options;
1002 const struct GetMessage *gm;
1004 const GNUNET_HashCode *opt;
1007 uint32_t ttl_decrement;
1010 enum GNUNET_BLOCK_Type type;
1011 GNUNET_PEER_Id spid;
1013 msize = ntohs(message->size);
1014 if (msize < sizeof (struct GetMessage))
1016 GNUNET_break_op (0);
1019 gm = (const struct GetMessage*) message;
1020 type = ntohl (gm->type);
1021 bm = ntohl (gm->hash_bitmap);
1029 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
1031 GNUNET_break_op (0);
1034 opt = (const GNUNET_HashCode*) &gm[1];
1035 bfsize = msize - sizeof (struct GetMessage) - bits * sizeof (GNUNET_HashCode);
1036 /* bfsize must be power of 2, check! */
1037 if (0 != ( (bfsize - 1) & bfsize))
1039 GNUNET_break_op (0);
1042 GSF_cover_query_count++;
1043 bm = ntohl (gm->hash_bitmap);
1045 cps = GNUNET_CONTAINER_multihashmap_get (cp_map,
1046 &other->hashPubKey);
1049 /* peer must have just disconnected */
1050 GNUNET_STATISTICS_update (GSF_stats,
1051 gettext_noop ("# requests dropped due to initiator not being connected"),
1056 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1057 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1064 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1066 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
1067 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
1070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1071 "Failed to find peer `%4s' in connection set. Dropping query.\n",
1072 GNUNET_i2s (other));
1074 GNUNET_STATISTICS_update (GSF_stats,
1075 gettext_noop ("# requests dropped due to missing reverse route"),
1080 /* note that we can really only check load here since otherwise
1081 peers could find out that we are overloaded by not being
1082 disconnected after sending us a malformed query... */
1083 priority = bound_priority (ntohl (gm->priority), cps);
1087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1088 "Dropping query from `%s', this peer is too busy.\n",
1089 GNUNET_i2s (other));
1094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1095 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
1096 GNUNET_h2s (&gm->query),
1097 (unsigned int) type,
1101 namespace = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) ? &opt[bits++] : NULL;
1102 if ( (type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
1103 (namespace == NULL) )
1105 GNUNET_break_op (0);
1108 if ( (type != GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
1109 (namespace != NULL) )
1111 GNUNET_break_op (0);
1114 target = (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO)) ? ((const struct GNUNET_PeerIdentity*) &opt[bits++]) : NULL;
1117 if ( (GNUNET_LOAD_get_load (cp->ppd.transmission_delay) > 3 * (1 + priority)) ||
1118 (GNUNET_LOAD_get_average (cp->ppd.transmission_delay) >
1119 GNUNET_CONSTANTS_MAX_CORK_DELAY.rel_value * 2 + GNUNET_LOAD_get_average (GSF_rt_entry_lifetime)) )
1121 /* don't have BW to send to peer, or would likely take longer than we have for it,
1122 so at best indirect the query */
1124 options |= GSF_PRO_FORWARD_ONLY;
1125 spid = GNUNET_PEER_intern (other);
1127 ttl = bound_ttl (ntohl (gm->ttl), priority);
1128 /* decrement ttl (always) */
1129 ttl_decrement = 2 * TTL_DECREMENT +
1130 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1133 (((int32_t)(ttl - ttl_decrement)) > 0) )
1136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1137 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
1142 GNUNET_STATISTICS_update (GSF_stats,
1143 gettext_noop ("# requests dropped due TTL underflow"),
1146 /* integer underflow => drop (should be very rare)! */
1149 ttl -= ttl_decrement;
1151 /* test if the request already exists */
1152 peerreq = GNUNET_CONTAINER_multihashmap_get (cp->request_map,
1154 if (peerreq != NULL)
1157 prd = GSF_pending_request_get_data_ (pr);
1158 if ( (prd->type == type) &&
1159 ( (type != GNUNET_BLOCK_TYPE_FS_SBLOCK) ||
1160 (0 == memcmp (&prd->namespace,
1162 sizeof (GNUNET_HashCode))) ) )
1164 if (prd->ttl.abs_value >= GNUNET_TIME_absolute_get().abs_value + ttl)
1166 /* existing request has higher TTL, drop new one! */
1167 prd->priority += priority;
1169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1170 "Have existing request with higher TTL, dropping new request.\n",
1171 GNUNET_i2s (other));
1173 GNUNET_STATISTICS_update (GSF_stats,
1174 gettext_noop ("# requests dropped due to higher-TTL request"),
1179 /* existing request has lower TTL, drop old one! */
1180 GNUNET_STATISTICS_update (GSF_stats,
1181 gettext_noop ("# P2P searches active"),
1184 priority += prd->priority;
1185 GSF_pending_request_cancel_ (pr);
1186 GNUNET_assert (GNUNET_YES ==
1187 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
1190 if (peerreq->kill_task != GNUNET_SCHEDULER_NO_TASK)
1192 GNUNET_SCHEDULER_cancel (peerreq->kill_task);
1193 peerreq->kill_task = GNUNET_SCHEDULER_NO_TASK;
1195 GNUNET_free (peerreq);
1199 peerreq = GNUNET_malloc (sizeof (struct PeerRequest));
1201 pr = GSF_pending_request_create_ (options,
1206 (bfsize > 0) ? (const char*)&opt[bits] : NULL,
1208 ntohl (gm->filter_mutator),
1210 (uint32_t) priority,
1213 NULL, 0, /* replies_seen */
1216 GNUNET_assert (NULL != pr);
1218 GNUNET_break (GNUNET_OK ==
1219 GNUNET_CONTAINER_multihashmap_put (cp->request_map,
1222 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1223 GNUNET_STATISTICS_update (GSF_stats,
1224 gettext_noop ("# P2P query messages received and processed"),
1227 GNUNET_STATISTICS_update (GSF_stats,
1228 gettext_noop ("# P2P searches active"),
1236 * Function called if there has been a timeout trying to satisfy
1237 * a transmission request.
1239 * @param cls the 'struct GSF_PeerTransmitHandle' of the request
1240 * @param tc scheduler context
1243 peer_transmit_timeout (void *cls,
1244 const struct GNUNET_SCHEDULER_TaskContext *tc)
1246 struct GSF_PeerTransmitHandle *pth = cls;
1247 struct GSF_ConnectedPeer *cp;
1250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1251 "Timeout trying to transmit to other peer\n");
1253 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1255 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1258 if (GNUNET_YES == pth->is_query)
1259 GNUNET_assert (0 < cp->ppd.pending_queries--);
1260 else if (GNUNET_NO == pth->is_query)
1261 GNUNET_assert (0 < cp->ppd.pending_replies--);
1262 GNUNET_LOAD_update (cp->ppd.transmission_delay,
1264 if (NULL != pth->cth)
1266 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1269 pth->gmc (pth->gmc_cls,
1271 GNUNET_assert (0 == pth->cth_in_progress);
1277 * Transmit a message to the given peer as soon as possible.
1278 * If the peer disconnects before the transmission can happen,
1279 * the callback is invoked with a 'NULL' buffer.
1281 * @param cp target peer
1282 * @param is_query is this a query (GNUNET_YES) or content (GNUNET_NO) or neither (GNUNET_SYSERR)
1283 * @param priority how important is this request?
1284 * @param timeout when does this request timeout (call gmc with error)
1285 * @param size number of bytes we would like to send to the peer
1286 * @param gmc function to call to get the message
1287 * @param gmc_cls closure for gmc
1288 * @return handle to cancel request
1290 struct GSF_PeerTransmitHandle *
1291 GSF_peer_transmit_ (struct GSF_ConnectedPeer *cp,
1294 struct GNUNET_TIME_Relative timeout,
1296 GSF_GetMessageCallback gmc,
1299 struct GSF_PeerTransmitHandle *pth;
1300 struct GSF_PeerTransmitHandle *pos;
1301 struct GSF_PeerTransmitHandle *prev;
1303 pth = GNUNET_malloc (sizeof (struct GSF_PeerTransmitHandle));
1304 pth->transmission_request_start_time = GNUNET_TIME_absolute_get ();
1305 pth->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1307 pth->gmc_cls = gmc_cls;
1309 pth->is_query = is_query;
1310 pth->priority = priority;
1312 /* insertion sort (by priority, descending) */
1315 while ( (pos != NULL) &&
1316 (pos->priority > priority) )
1322 GNUNET_CONTAINER_DLL_insert (cp->pth_head,
1326 GNUNET_CONTAINER_DLL_insert_after (cp->pth_head,
1330 if (GNUNET_YES == is_query)
1331 cp->ppd.pending_queries++;
1332 else if (GNUNET_NO == is_query)
1333 cp->ppd.pending_replies++;
1334 pth->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
1335 &peer_transmit_timeout,
1337 schedule_transmission (pth);
1343 * Cancel an earlier request for transmission.
1345 * @param pth request to cancel
1348 GSF_peer_transmit_cancel_ (struct GSF_PeerTransmitHandle *pth)
1350 struct GSF_ConnectedPeer *cp;
1352 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1354 GNUNET_SCHEDULER_cancel (pth->timeout_task);
1355 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1357 if (NULL != pth->cth)
1359 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1363 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1366 if (GNUNET_YES == pth->is_query)
1367 GNUNET_assert (0 < cp->ppd.pending_queries--);
1368 else if (GNUNET_NO == pth->is_query)
1369 GNUNET_assert (0 < cp->ppd.pending_replies--);
1370 GNUNET_assert (0 == pth->cth_in_progress);
1376 * Report on receiving a reply; update the performance record of the given peer.
1378 * @param cp responding peer (will be updated)
1379 * @param request_time time at which the original query was transmitted
1380 * @param request_priority priority of the original request
1383 GSF_peer_update_performance_ (struct GSF_ConnectedPeer *cp,
1384 struct GNUNET_TIME_Absolute request_time,
1385 uint32_t request_priority)
1387 struct GNUNET_TIME_Relative delay;
1389 delay = GNUNET_TIME_absolute_get_duration (request_time);
1390 cp->ppd.avg_reply_delay.rel_value = (cp->ppd.avg_reply_delay.rel_value * (RUNAVG_DELAY_N-1) + delay.rel_value) / RUNAVG_DELAY_N;
1391 cp->ppd.avg_priority = (cp->ppd.avg_priority * (RUNAVG_DELAY_N-1) + request_priority) / RUNAVG_DELAY_N;
1396 * Report on receiving a reply in response to an initiating client.
1397 * Remember that this peer is good for this client.
1399 * @param cp responding peer (will be updated)
1400 * @param initiator_client local client on responsible for query
1403 GSF_peer_update_responder_client_ (struct GSF_ConnectedPeer *cp,
1404 struct GSF_LocalClient *initiator_client)
1406 cp->ppd.last_client_replies[cp->last_client_replies_woff++ % CS2P_SUCCESS_LIST_SIZE] = initiator_client;
1411 * Report on receiving a reply in response to an initiating peer.
1412 * Remember that this peer is good for this initiating peer.
1414 * @param cp responding peer (will be updated)
1415 * @param initiator_peer other peer responsible for query
1418 GSF_peer_update_responder_peer_ (struct GSF_ConnectedPeer *cp,
1419 const struct GSF_ConnectedPeer *initiator_peer)
1421 GNUNET_PEER_change_rc (cp->ppd.last_p2p_replies[cp->last_p2p_replies_woff % P2P_SUCCESS_LIST_SIZE], -1);
1422 cp->ppd.last_p2p_replies[cp->last_p2p_replies_woff++ % P2P_SUCCESS_LIST_SIZE] = initiator_peer->ppd.pid;
1423 GNUNET_PEER_change_rc (initiator_peer->ppd.pid, 1);
1428 * Method called whenever a given peer has a status change.
1430 * @param cls closure
1431 * @param peer peer identity this notification is about
1432 * @param bandwidth_in available amount of inbound bandwidth
1433 * @param bandwidth_out available amount of outbound bandwidth
1434 * @param timeout absolute time when this peer will time out
1435 * unless we see some further activity from it
1436 * @param atsi status information
1439 GSF_peer_status_handler_ (void *cls,
1440 const struct GNUNET_PeerIdentity *peer,
1441 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1442 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
1443 struct GNUNET_TIME_Absolute timeout,
1444 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1446 struct GSF_ConnectedPeer *cp;
1448 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1450 GNUNET_assert (NULL != cp);
1451 update_atsi (cp, atsi);
1456 * Cancel all requests associated with the peer.
1459 * @param query hash code of the request
1460 * @param value the 'struct GSF_PendingRequest'
1461 * @return GNUNET_YES (continue to iterate)
1464 cancel_pending_request (void *cls,
1465 const GNUNET_HashCode *query,
1468 struct PeerRequest *peerreq = value;
1469 struct GSF_PendingRequest *pr = peerreq->pr;
1471 GSF_pending_request_cancel_ (pr);
1472 if (peerreq->kill_task != GNUNET_SCHEDULER_NO_TASK)
1474 GNUNET_SCHEDULER_cancel (peerreq->kill_task);
1475 peerreq->kill_task = GNUNET_SCHEDULER_NO_TASK;
1477 GNUNET_free (peerreq);
1483 * A peer disconnected from us. Tear down the connected peer
1487 * @param peer identity of peer that connected
1490 GSF_peer_disconnect_handler_ (void *cls,
1491 const struct GNUNET_PeerIdentity *peer)
1493 struct GSF_ConnectedPeer *cp;
1494 struct GSF_PeerTransmitHandle *pth;
1496 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1499 return; /* must have been disconnect from core with
1500 'peer' == my_id, ignore */
1501 GNUNET_CONTAINER_multihashmap_remove (cp_map,
1504 if (NULL != cp->migration_pth)
1506 GSF_peer_transmit_cancel_ (cp->migration_pth);
1507 cp->migration_pth = NULL;
1509 if (NULL != cp->irc)
1511 GNUNET_CORE_peer_change_preference_cancel (cp->irc);
1514 if (GNUNET_SCHEDULER_NO_TASK != cp->irc_delay_task)
1516 GNUNET_SCHEDULER_cancel (cp->irc_delay_task);
1517 cp->irc_delay_task = GNUNET_SCHEDULER_NO_TASK;
1519 GNUNET_CONTAINER_multihashmap_iterate (cp->request_map,
1520 &cancel_pending_request,
1522 GNUNET_CONTAINER_multihashmap_destroy (cp->request_map);
1523 cp->request_map = NULL;
1524 GSF_plan_notify_peer_disconnect_ (cp);
1525 GNUNET_LOAD_value_free (cp->ppd.transmission_delay);
1526 GNUNET_PEER_decrement_rcs (cp->ppd.last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
1527 while (NULL != (pth = cp->pth_head))
1529 if (NULL != pth->cth)
1531 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1534 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1536 GNUNET_SCHEDULER_cancel (pth->timeout_task);
1537 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1539 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1542 GNUNET_assert (0 == pth->cth_in_progress);
1545 GNUNET_PEER_change_rc (cp->ppd.pid, -1);
1546 if (GNUNET_SCHEDULER_NO_TASK != cp->mig_revive_task)
1548 GNUNET_SCHEDULER_cancel (cp->mig_revive_task);
1549 cp->mig_revive_task = GNUNET_SCHEDULER_NO_TASK;
1556 * Closure for 'call_iterator'.
1558 struct IterationContext
1561 * Function to call on each entry.
1563 GSF_ConnectedPeerIterator it;
1573 * Function that calls the callback for each peer.
1575 * @param cls the 'struct IterationContext*'
1576 * @param key identity of the peer
1577 * @param value the 'struct GSF_ConnectedPeer*'
1578 * @return GNUNET_YES to continue iteration
1581 call_iterator (void *cls,
1582 const GNUNET_HashCode *key,
1585 struct IterationContext *ic = cls;
1586 struct GSF_ConnectedPeer *cp = value;
1589 (const struct GNUNET_PeerIdentity*) key,
1597 * Iterate over all connected peers.
1599 * @param it function to call for each peer
1600 * @param it_cls closure for it
1603 GSF_iterate_connected_peers_ (GSF_ConnectedPeerIterator it,
1606 struct IterationContext ic;
1610 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1617 * Obtain the identity of a connected peer.
1619 * @param cp peer to reserve bandwidth from
1620 * @param id identity to set (written to)
1623 GSF_connected_peer_get_identity_ (const struct GSF_ConnectedPeer *cp,
1624 struct GNUNET_PeerIdentity *id)
1626 GNUNET_PEER_resolve (cp->ppd.pid,
1632 * Assemble a migration stop message for transmission.
1634 * @param cls the 'struct GSF_ConnectedPeer' to use
1635 * @param size number of bytes we're allowed to write to buf
1636 * @param buf where to copy the message
1637 * @return number of bytes copied to buf
1640 create_migration_stop_message (void *cls,
1644 struct GSF_ConnectedPeer *cp = cls;
1645 struct MigrationStopMessage msm;
1647 cp->migration_pth = NULL;
1650 GNUNET_assert (size >= sizeof (struct MigrationStopMessage));
1651 msm.header.size = htons (sizeof (struct MigrationStopMessage));
1652 msm.header.type = htons (GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP);
1653 msm.reserved = htonl (0);
1654 msm.duration = GNUNET_TIME_relative_hton (GNUNET_TIME_absolute_get_remaining (cp->last_migration_block));
1655 memcpy (buf, &msm, sizeof (struct MigrationStopMessage));
1656 return sizeof (struct MigrationStopMessage);
1661 * Ask a peer to stop migrating data to us until the given point
1664 * @param cp peer to ask
1665 * @param block_time until when to block
1668 GSF_block_peer_migration_ (struct GSF_ConnectedPeer *cp,
1669 struct GNUNET_TIME_Relative block_time)
1671 if (GNUNET_TIME_absolute_get_remaining (cp->last_migration_block).rel_value > block_time.rel_value)
1674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1675 "Migration already blocked for another %llu ms\n",
1676 (unsigned long long) GNUNET_TIME_absolute_get_remaining (cp->last_migration_block).rel_value);
1678 return; /* already blocked */
1681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1682 "Asking to stop migration for %llu ms\n",
1683 (unsigned long long) block_time.rel_value);
1685 cp->last_migration_block = GNUNET_TIME_relative_to_absolute (block_time);
1686 if (cp->migration_pth != NULL)
1687 GSF_peer_transmit_cancel_ (cp->migration_pth);
1689 = GSF_peer_transmit_ (cp,
1692 GNUNET_TIME_UNIT_FOREVER_REL,
1693 sizeof (struct MigrationStopMessage),
1694 &create_migration_stop_message,
1700 * Write host-trust information to a file - flush the buffer entry!
1702 * @param cls closure, not used
1703 * @param key host identity
1704 * @param value the 'struct GSF_ConnectedPeer' to flush
1705 * @return GNUNET_OK to continue iteration
1708 flush_trust (void *cls,
1709 const GNUNET_HashCode *key,
1712 struct GSF_ConnectedPeer *cp = value;
1715 struct GNUNET_PeerIdentity pid;
1717 if (cp->ppd.trust == cp->disk_trust)
1718 return GNUNET_OK; /* unchanged */
1719 GNUNET_PEER_resolve (cp->ppd.pid,
1721 fn = get_trust_filename (&pid);
1722 if (cp->ppd.trust == 0)
1724 if ((0 != UNLINK (fn)) && (errno != ENOENT))
1725 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING |
1726 GNUNET_ERROR_TYPE_BULK, "unlink", fn);
1730 trust = htonl (cp->ppd.trust);
1731 if (sizeof(uint32_t) == GNUNET_DISK_fn_write (fn, &trust,
1733 GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE
1734 | GNUNET_DISK_PERM_GROUP_READ | GNUNET_DISK_PERM_OTHER_READ))
1735 cp->disk_trust = cp->ppd.trust;
1743 * Notify core about a preference we have for the given peer
1744 * (to allocate more resources towards it). The change will
1745 * be communicated the next time we reserve bandwidth with
1746 * core (not instantly).
1748 * @param cp peer to reserve bandwidth from
1749 * @param pref preference change
1752 GSF_connected_peer_change_preference_ (struct GSF_ConnectedPeer *cp,
1755 cp->inc_preference += pref;
1760 * Call this method periodically to flush trust information to disk.
1762 * @param cls closure, not used
1763 * @param tc task context, not used
1766 cron_flush_trust (void *cls,
1767 const struct GNUNET_SCHEDULER_TaskContext *tc)
1772 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1777 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1779 GNUNET_SCHEDULER_add_delayed (TRUST_FLUSH_FREQ,
1786 * Initialize peer management subsystem.
1789 GSF_connected_peer_init_ ()
1791 cp_map = GNUNET_CONTAINER_multihashmap_create (128);
1792 GNUNET_assert (GNUNET_OK ==
1793 GNUNET_CONFIGURATION_get_value_filename (GSF_cfg,
1797 GNUNET_DISK_directory_create (trustDirectory);
1798 GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_HIGH,
1799 &cron_flush_trust, NULL);
1804 * Iterator to free peer entries.
1806 * @param cls closure, unused
1807 * @param key current key code
1808 * @param value value in the hash map (peer entry)
1809 * @return GNUNET_YES (we should continue to iterate)
1812 clean_peer (void *cls,
1813 const GNUNET_HashCode * key,
1816 GSF_peer_disconnect_handler_ (NULL,
1817 (const struct GNUNET_PeerIdentity*) key);
1823 * Shutdown peer management subsystem.
1826 GSF_connected_peer_done_ ()
1828 cron_flush_trust (NULL, NULL);
1829 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1832 GNUNET_CONTAINER_multihashmap_destroy (cp_map);
1834 GNUNET_free (trustDirectory);
1835 trustDirectory = NULL;
1840 * Iterator to remove references to LC entry.
1842 * @param cls the 'struct GSF_LocalClient*' to look for
1843 * @param key current key code
1844 * @param value value in the hash map (peer entry)
1845 * @return GNUNET_YES (we should continue to iterate)
1848 clean_local_client (void *cls,
1849 const GNUNET_HashCode * key,
1852 const struct GSF_LocalClient *lc = cls;
1853 struct GSF_ConnectedPeer *cp = value;
1856 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
1857 if (cp->ppd.last_client_replies[i] == lc)
1858 cp->ppd.last_client_replies[i] = NULL;
1864 * Notification that a local client disconnected. Clean up all of our
1865 * references to the given handle.
1867 * @param lc handle to the local client (henceforth invalid)
1870 GSF_handle_local_client_disconnect_ (const struct GSF_LocalClient *lc)
1873 return; /* already cleaned up */
1874 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1875 &clean_local_client,
1880 /* end of gnunet-service-fs_cp.c */