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.
10 GNUnet is distributed in the hope that it will be useful, but
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 * GNUNET_YES if this is a query, GNUNET_NO for content.
108 * Did we get a reservation already?
113 * Priority of this request.
121 * Information per peer and request.
127 * Handle to generic request.
129 struct GSF_PendingRequest *pr;
132 * Handle to specific peer.
134 struct GSF_ConnectedPeer *cp;
137 * Task for asynchronous stopping of this request.
139 GNUNET_SCHEDULER_TaskIdentifier kill_task;
147 struct GSF_ConnectedPeer
151 * Performance data for this peer.
153 struct GSF_PeerPerformanceData ppd;
156 * Time until when we blocked this peer from migrating
159 struct GNUNET_TIME_Absolute last_migration_block;
162 * Task scheduled to revive migration to this peer.
164 GNUNET_SCHEDULER_TaskIdentifier mig_revive_task;
167 * Messages (replies, queries, content migration) we would like to
168 * send to this peer in the near future. Sorted by priority, head.
170 struct GSF_PeerTransmitHandle *pth_head;
173 * Messages (replies, queries, content migration) we would like to
174 * send to this peer in the near future. Sorted by priority, tail.
176 struct GSF_PeerTransmitHandle *pth_tail;
179 * Migration stop message in our queue, or NULL if we have none pending.
181 struct GSF_PeerTransmitHandle *migration_pth;
184 * Context of our GNUNET_CORE_peer_change_preference call (or NULL).
186 struct GNUNET_CORE_InformationRequestContext *irc;
189 * Task scheduled if we need to retry bandwidth reservation later.
191 GNUNET_SCHEDULER_TaskIdentifier irc_delay_task;
194 * Active requests from this neighbour, map of query to 'struct PeerRequest'.
196 struct GNUNET_CONTAINER_MultiHashMap *request_map;
199 * Increase in traffic preference still to be submitted
200 * to the core service for this peer.
202 uint64_t inc_preference;
205 * Trust rating for this peer on disk.
210 * Which offset in "last_p2p_replies" will be updated next?
211 * (we go round-robin).
213 unsigned int last_p2p_replies_woff;
216 * Which offset in "last_client_replies" will be updated next?
217 * (we go round-robin).
219 unsigned int last_client_replies_woff;
222 * Current offset into 'last_request_times' ring buffer.
224 unsigned int last_request_times_off;
227 * GNUNET_YES if we did successfully reserve 32k bandwidth,
236 * Map from peer identities to 'struct GSF_ConnectPeer' entries.
238 static struct GNUNET_CONTAINER_MultiHashMap *cp_map;
241 * Where do we store trust information?
243 static char *trustDirectory;
247 * Get the filename under which we would store the GNUNET_HELLO_Message
248 * for the given host and protocol.
249 * @return filename of the form DIRECTORY/HOSTID
252 get_trust_filename (const struct GNUNET_PeerIdentity *id)
254 struct GNUNET_CRYPTO_HashAsciiEncoded fil;
257 GNUNET_CRYPTO_hash_to_enc (&id->hashPubKey, &fil);
258 GNUNET_asprintf (&fn, "%s%s%s", trustDirectory, DIR_SEPARATOR_STR, &fil);
264 * Find latency information in 'atsi'.
266 * @param atsi performance data
267 * @return connection latency
269 static struct GNUNET_TIME_Relative
270 get_latency (const struct GNUNET_TRANSPORT_ATS_Information *atsi)
273 return GNUNET_TIME_UNIT_SECONDS;
274 while ( (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) &&
275 (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY) )
277 if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR)
280 /* how can we not have latency data? */
281 return GNUNET_TIME_UNIT_SECONDS;
283 return GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
284 ntohl (atsi->value));
289 * Update the performance information kept for the given peer.
291 * @param cp peer record to update
292 * @param atsi transport performance data
295 update_atsi (struct GSF_ConnectedPeer *cp,
296 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
298 struct GNUNET_TIME_Relative latency;
300 latency = get_latency (atsi);
301 GNUNET_LOAD_value_set_decline (cp->ppd.transmission_delay,
303 /* LATER: merge atsi into cp's performance data (if we ever care...) */
308 * Return the performance data record for the given peer
310 * @param cp peer to query
311 * @return performance data record for the peer
313 struct GSF_PeerPerformanceData *
314 GSF_get_peer_performance_data_ (struct GSF_ConnectedPeer *cp)
321 * Core is ready to transmit to a peer, get the message.
323 * @param cls the 'struct GSF_PeerTransmitHandle' of the message
324 * @param size number of bytes core is willing to take
325 * @param buf where to copy the message
326 * @return number of bytes copied to buf
329 peer_transmit_ready_cb (void *cls,
337 * Function called by core upon success or failure of our bandwidth reservation request.
339 * @param cls the 'struct GSF_ConnectedPeer' of the peer for which we made the request
340 * @param peer identifies the peer
341 * @param bandwidth_out available amount of outbound bandwidth
342 * @param amount set to the amount that was actually reserved or unreserved;
343 * either the full requested amount or zero (no partial reservations)
344 * @param res_delay if the reservation could not be satisfied (amount was 0), how
345 * long should the client wait until re-trying?
346 * @param preference current traffic preference for the given peer
349 core_reserve_callback (void *cls,
350 const struct GNUNET_PeerIdentity *peer,
351 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
353 struct GNUNET_TIME_Relative res_delay,
354 uint64_t preference);
358 * If ready (bandwidth reserved), try to schedule transmission via
359 * core for the given handle.
361 * @param pth transmission handle to schedule
364 schedule_transmission (struct GSF_PeerTransmitHandle *pth)
366 struct GSF_ConnectedPeer *cp;
367 struct GNUNET_PeerIdentity target;
370 if (NULL != pth->cth)
371 return; /* already done */
373 GNUNET_PEER_resolve (cp->ppd.pid,
375 if ( (GNUNET_YES == pth->is_query) &&
376 (GNUNET_YES != pth->was_reserved) )
378 /* query, need reservation */
379 if (GNUNET_YES != cp->did_reserve)
380 return; /* not ready */
381 cp->did_reserve = GNUNET_NO;
382 /* reservation already done! */
383 pth->was_reserved = GNUNET_YES;
384 ip = cp->inc_preference;
385 cp->inc_preference = 0;
386 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
388 GNUNET_TIME_UNIT_FOREVER_REL,
389 GNUNET_BANDWIDTH_VALUE_MAX,
392 &core_reserve_callback,
395 pth->cth = GNUNET_CORE_notify_transmit_ready (GSF_core,
398 GNUNET_TIME_absolute_get_remaining (pth->timeout),
401 &peer_transmit_ready_cb,
407 * Core is ready to transmit to a peer, get the message.
409 * @param cls the 'struct GSF_PeerTransmitHandle' of the message
410 * @param size number of bytes core is willing to take
411 * @param buf where to copy the message
412 * @return number of bytes copied to buf
415 peer_transmit_ready_cb (void *cls,
419 struct GSF_PeerTransmitHandle *pth = cls;
420 struct GSF_ConnectedPeer *cp;
423 GNUNET_assert ( (NULL == buf) ||
424 (pth->size <= size) );
426 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
428 GNUNET_SCHEDULER_cancel (pth->timeout_task);
429 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
432 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
435 if (GNUNET_YES == pth->is_query)
437 cp->ppd.last_request_times[(cp->last_request_times_off++) % MAX_QUEUE_PER_PEER] = GNUNET_TIME_absolute_get ();
438 GNUNET_assert (0 < cp->ppd.pending_queries--);
440 else if (GNUNET_NO == pth->is_query)
442 GNUNET_assert (0 < cp->ppd.pending_replies--);
444 GNUNET_LOAD_update (cp->ppd.transmission_delay,
445 GNUNET_TIME_absolute_get_duration (pth->transmission_request_start_time).rel_value);
446 ret = pth->gmc (pth->gmc_cls,
449 for (pth = cp->pth_head; pth != NULL; pth = pth->next)
450 schedule_transmission (pth);
456 * (re)try to reserve bandwidth from the given peer.
458 * @param cls the 'struct GSF_ConnectedPeer' to reserve from
459 * @param tc scheduler context
462 retry_reservation (void *cls,
463 const struct GNUNET_SCHEDULER_TaskContext *tc)
465 struct GSF_ConnectedPeer *cp = cls;
467 struct GNUNET_PeerIdentity target;
469 GNUNET_PEER_resolve (cp->ppd.pid,
471 cp->irc_delay_task = GNUNET_SCHEDULER_NO_TASK;
472 ip = cp->inc_preference;
473 cp->inc_preference = 0;
474 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
476 GNUNET_TIME_UNIT_FOREVER_REL,
477 GNUNET_BANDWIDTH_VALUE_MAX,
480 &core_reserve_callback,
486 * Function called by core upon success or failure of our bandwidth reservation request.
488 * @param cls the 'struct GSF_ConnectedPeer' of the peer for which we made the request
489 * @param peer identifies the peer
490 * @param bandwidth_out available amount of outbound bandwidth
491 * @param amount set to the amount that was actually reserved or unreserved;
492 * either the full requested amount or zero (no partial reservations)
493 * @param res_delay if the reservation could not be satisfied (amount was 0), how
494 * long should the client wait until re-trying?
495 * @param preference current traffic preference for the given peer
498 core_reserve_callback (void *cls,
499 const struct GNUNET_PeerIdentity *peer,
500 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
502 struct GNUNET_TIME_Relative res_delay,
505 struct GSF_ConnectedPeer *cp = cls;
506 struct GSF_PeerTransmitHandle *pth;
511 cp->irc_delay_task = GNUNET_SCHEDULER_add_delayed (res_delay,
516 cp->did_reserve = GNUNET_YES;
518 if ( (NULL != pth) &&
521 /* reservation success, try transmission now! */
522 pth->cth = GNUNET_CORE_notify_transmit_ready (GSF_core,
525 GNUNET_TIME_absolute_get_remaining (pth->timeout),
528 &peer_transmit_ready_cb,
535 * A peer connected to us. Setup the connected peer
538 * @param peer identity of peer that connected
539 * @param atsi performance data for the connection
540 * @return handle to connected peer entry
542 struct GSF_ConnectedPeer *
543 GSF_peer_connect_handler_ (const struct GNUNET_PeerIdentity *peer,
544 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
546 struct GSF_ConnectedPeer *cp;
550 cp = GNUNET_malloc (sizeof (struct GSF_ConnectedPeer));
551 cp->ppd.pid = GNUNET_PEER_intern (peer);
552 cp->ppd.transmission_delay = GNUNET_LOAD_value_init (GNUNET_TIME_UNIT_ZERO);
553 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
555 GNUNET_TIME_UNIT_FOREVER_REL,
556 GNUNET_BANDWIDTH_VALUE_MAX,
559 &core_reserve_callback,
561 fn = get_trust_filename (peer);
562 if ((GNUNET_DISK_file_test (fn) == GNUNET_YES) &&
563 (sizeof (trust) == GNUNET_DISK_fn_read (fn, &trust, sizeof (trust))))
564 cp->disk_trust = cp->ppd.trust = ntohl (trust);
566 cp->request_map = GNUNET_CONTAINER_multihashmap_create (128);
567 GNUNET_break (GNUNET_OK ==
568 GNUNET_CONTAINER_multihashmap_put (cp_map,
571 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
572 update_atsi (cp, atsi);
573 GSF_push_start_ (cp);
579 * It may be time to re-start migrating content to this
580 * peer. Check, and if so, restart migration.
582 * @param cls the 'struct GSF_ConnectedPeer'
583 * @param tc scheduler context
586 revive_migration (void *cls,
587 const struct GNUNET_SCHEDULER_TaskContext *tc)
589 struct GSF_ConnectedPeer *cp = cls;
590 struct GNUNET_TIME_Relative bt;
592 cp->mig_revive_task = GNUNET_SCHEDULER_NO_TASK;
593 bt = GNUNET_TIME_absolute_get_remaining (cp->ppd.migration_blocked_until);
594 if (0 != bt.rel_value)
596 /* still time left... */
598 = GNUNET_SCHEDULER_add_delayed (bt,
603 GSF_push_start_ (cp);
608 * Get a handle for a connected peer.
610 * @param peer peer's identity
611 * @return NULL if the peer is not currently connected
613 struct GSF_ConnectedPeer *
614 GSF_peer_get_ (const struct GNUNET_PeerIdentity *peer)
616 return GNUNET_CONTAINER_multihashmap_get (cp_map,
622 * Handle P2P "MIGRATION_STOP" message.
624 * @param cls closure, always NULL
625 * @param other the other peer involved (sender or receiver, NULL
626 * for loopback messages where we are both sender and receiver)
627 * @param message the actual message
628 * @param atsi performance information
629 * @return GNUNET_OK to keep the connection open,
630 * GNUNET_SYSERR to close it (signal serious error)
633 GSF_handle_p2p_migration_stop_ (void *cls,
634 const struct GNUNET_PeerIdentity *other,
635 const struct GNUNET_MessageHeader *message,
636 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
638 struct GSF_ConnectedPeer *cp;
639 const struct MigrationStopMessage *msm;
640 struct GNUNET_TIME_Relative bt;
642 msm = (const struct MigrationStopMessage*) message;
643 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
650 bt = GNUNET_TIME_relative_ntoh (msm->duration);
651 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
652 _("Migration of content to peer `%s' blocked for %llu ms\n"),
654 (unsigned long long) bt.rel_value);
655 cp->ppd.migration_blocked_until = GNUNET_TIME_relative_to_absolute (bt);
656 if (cp->mig_revive_task == GNUNET_SCHEDULER_NO_TASK)
660 = GNUNET_SCHEDULER_add_delayed (bt,
664 update_atsi (cp, atsi);
670 * Copy reply and free put message.
672 * @param cls the 'struct PutMessage'
673 * @param buf_size number of bytes available in buf
674 * @param buf where to copy the message, NULL on error (peer disconnect)
675 * @return number of bytes copied to 'buf', can be 0 (without indicating an error)
678 copy_reply (void *cls,
682 struct PutMessage *pm = cls;
687 GNUNET_assert (buf_size >= ntohs (pm->header.size));
688 size = ntohs (pm->header.size);
689 memcpy (buf, pm, size);
690 GNUNET_STATISTICS_update (GSF_stats,
691 gettext_noop ("# replies transmitted to other peers"),
698 GNUNET_STATISTICS_update (GSF_stats,
699 gettext_noop ("# replies dropped"),
709 * Free the given request.
711 * @param cls the request to free
712 * @param tc task context
715 peer_request_destroy (void *cls,
716 const struct GNUNET_SCHEDULER_TaskContext *tc)
718 struct PeerRequest *peerreq = cls;
719 struct GSF_PendingRequest *pr = peerreq->pr;
720 struct GSF_ConnectedPeer *cp = peerreq->cp;
721 struct GSF_PendingRequestData *prd;
723 peerreq->kill_task = GNUNET_SCHEDULER_NO_TASK;
724 prd = GSF_pending_request_get_data_ (pr);
725 GNUNET_STATISTICS_update (GSF_stats,
726 gettext_noop ("# P2P searches active"),
729 GNUNET_break (GNUNET_OK ==
730 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
733 GSF_pending_request_cancel_ (pr);
734 GNUNET_free (peerreq);
739 * Handle a reply to a pending request. Also called if a request
740 * expires (then with data == NULL). The handler may be called
741 * many times (depending on the request type), but will not be
742 * called during or after a call to GSF_pending_request_cancel
743 * and will also not be called anymore after a call signalling
746 * @param cls 'struct PeerRequest' this is an answer for
747 * @param eval evaluation of the result
748 * @param pr handle to the original pending request
749 * @param expiration when does 'data' expire?
750 * @param type type of the block
751 * @param data response data, NULL on request expiration
752 * @param data_len number of bytes in data
755 handle_p2p_reply (void *cls,
756 enum GNUNET_BLOCK_EvaluationResult eval,
757 struct GSF_PendingRequest *pr,
758 struct GNUNET_TIME_Absolute expiration,
759 enum GNUNET_BLOCK_Type type,
763 struct PeerRequest *peerreq = cls;
764 struct GSF_ConnectedPeer *cp = peerreq->cp;
765 struct GSF_PendingRequestData *prd;
766 struct PutMessage *pm;
769 GNUNET_assert (data_len + sizeof (struct PutMessage) < GNUNET_SERVER_MAX_MESSAGE_SIZE);
770 GNUNET_assert (peerreq->pr == pr);
771 prd = GSF_pending_request_get_data_ (pr);
774 GNUNET_STATISTICS_update (GSF_stats,
775 gettext_noop ("# P2P searches active"),
778 GNUNET_break (GNUNET_OK ==
779 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
782 GNUNET_free (peerreq);
785 GNUNET_break (type != GNUNET_BLOCK_TYPE_ANY);
786 if ( (prd->type != type) &&
787 (prd->type != GNUNET_BLOCK_TYPE_ANY) )
793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
794 "Transmitting result for query `%s' to peer\n",
795 GNUNET_h2s (&prd->query));
797 GNUNET_STATISTICS_update (GSF_stats,
798 gettext_noop ("# replies received for other peers"),
801 msize = sizeof (struct PutMessage) + data_len;
802 if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
807 pm = GNUNET_malloc (msize);
808 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
809 pm->header.size = htons (msize);
810 pm->type = htonl (type);
811 pm->expiration = GNUNET_TIME_absolute_hton (expiration);
812 memcpy (&pm[1], data, data_len);
813 (void) GSF_peer_transmit_ (cp, GNUNET_NO,
819 if (eval != GNUNET_BLOCK_EVALUATION_OK_LAST)
821 peerreq->kill_task = GNUNET_SCHEDULER_add_now (&peer_request_destroy,
827 * Increase the host credit by a value.
829 * @param cp which peer to change the trust value on
830 * @param value is the int value by which the
831 * host credit is to be increased or decreased
832 * @returns the actual change in trust (positive or negative)
835 change_host_trust (struct GSF_ConnectedPeer *cp, int value)
839 GNUNET_assert (cp != NULL);
842 if (cp->ppd.trust + value < cp->ppd.trust)
844 value = UINT32_MAX - cp->ppd.trust;
845 cp->ppd.trust = UINT32_MAX;
848 cp->ppd.trust += value;
852 if (cp->ppd.trust < -value)
854 value = -cp->ppd.trust;
858 cp->ppd.trust += value;
865 * We've received a request with the specified priority. Bound it
866 * according to how much we trust the given peer.
868 * @param prio_in requested priority
869 * @param cp the peer making the request
870 * @return effective priority
873 bound_priority (uint32_t prio_in,
874 struct GSF_ConnectedPeer *cp)
876 #define N ((double)128.0)
881 ld = GSF_test_get_load_too_high_ (0);
882 if (ld == GNUNET_SYSERR)
884 GNUNET_STATISTICS_update (GSF_stats,
885 gettext_noop ("# requests done for free (low load)"),
888 return 0; /* excess resources */
890 if (prio_in > INT32_MAX)
892 ret = - change_host_trust (cp, - (int) prio_in);
895 if (ret > GSF_current_priorities + N)
896 rret = GSF_current_priorities + N;
899 GSF_current_priorities
900 = (GSF_current_priorities * (N-1) + rret)/N;
902 if ( (ld == GNUNET_YES) && (ret > 0) )
904 /* try with charging */
905 ld = GSF_test_get_load_too_high_ (ret);
907 if (ld == GNUNET_YES)
909 GNUNET_STATISTICS_update (GSF_stats,
910 gettext_noop ("# request dropped, priority insufficient"),
914 change_host_trust (cp, (int) ret);
915 return -1; /* not enough resources */
919 GNUNET_STATISTICS_update (GSF_stats,
920 gettext_noop ("# requests done for a price (normal load)"),
930 * The priority level imposes a bound on the maximum
931 * value for the ttl that can be requested.
933 * @param ttl_in requested ttl
934 * @param prio given priority
935 * @return ttl_in if ttl_in is below the limit,
936 * otherwise the ttl-limit for the given priority
939 bound_ttl (int32_t ttl_in, uint32_t prio)
941 unsigned long long allowed;
945 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
946 if (ttl_in > allowed)
948 if (allowed >= (1 << 30))
957 * Handle P2P "QUERY" message. Creates the pending request entry
958 * and sets up all of the data structures to that we will
959 * process replies properly. Does not initiate forwarding or
960 * local database lookups.
962 * @param other the other peer involved (sender or receiver, NULL
963 * for loopback messages where we are both sender and receiver)
964 * @param message the actual message
965 * @return pending request handle, NULL on error
967 struct GSF_PendingRequest *
968 GSF_handle_p2p_query_ (const struct GNUNET_PeerIdentity *other,
969 const struct GNUNET_MessageHeader *message)
971 struct PeerRequest *peerreq;
972 struct GSF_PendingRequest *pr;
973 struct GSF_PendingRequestData *prd;
974 struct GSF_ConnectedPeer *cp;
975 struct GSF_ConnectedPeer *cps;
976 const GNUNET_HashCode *namespace;
977 const struct GNUNET_PeerIdentity *target;
978 enum GSF_PendingRequestOptions options;
980 const struct GetMessage *gm;
982 const GNUNET_HashCode *opt;
985 uint32_t ttl_decrement;
988 enum GNUNET_BLOCK_Type type;
991 msize = ntohs(message->size);
992 if (msize < sizeof (struct GetMessage))
997 gm = (const struct GetMessage*) message;
998 type = ntohl (gm->type);
999 bm = ntohl (gm->hash_bitmap);
1007 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
1009 GNUNET_break_op (0);
1012 opt = (const GNUNET_HashCode*) &gm[1];
1013 bfsize = msize - sizeof (struct GetMessage) - bits * sizeof (GNUNET_HashCode);
1014 /* bfsize must be power of 2, check! */
1015 if (0 != ( (bfsize - 1) & bfsize))
1017 GNUNET_break_op (0);
1020 GSF_cover_query_count++;
1021 bm = ntohl (gm->hash_bitmap);
1023 cps = GNUNET_CONTAINER_multihashmap_get (cp_map,
1024 &other->hashPubKey);
1027 /* peer must have just disconnected */
1028 GNUNET_STATISTICS_update (GSF_stats,
1029 gettext_noop ("# requests dropped due to initiator not being connected"),
1034 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1035 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1042 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1044 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
1045 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
1048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1049 "Failed to find peer `%4s' in connection set. Dropping query.\n",
1050 GNUNET_i2s (other));
1052 GNUNET_STATISTICS_update (GSF_stats,
1053 gettext_noop ("# requests dropped due to missing reverse route"),
1058 /* note that we can really only check load here since otherwise
1059 peers could find out that we are overloaded by not being
1060 disconnected after sending us a malformed query... */
1061 priority = bound_priority (ntohl (gm->priority), cps);
1065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1066 "Dropping query from `%s', this peer is too busy.\n",
1067 GNUNET_i2s (other));
1072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1073 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
1074 GNUNET_h2s (&gm->query),
1075 (unsigned int) type,
1079 namespace = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) ? &opt[bits++] : NULL;
1080 if ( (type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
1081 (namespace == NULL) )
1083 GNUNET_break_op (0);
1086 if ( (type != GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
1087 (namespace != NULL) )
1089 GNUNET_break_op (0);
1092 target = (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO)) ? ((const struct GNUNET_PeerIdentity*) &opt[bits++]) : NULL;
1095 if ( (GNUNET_LOAD_get_load (cp->ppd.transmission_delay) > 3 * (1 + priority)) ||
1096 (GNUNET_LOAD_get_average (cp->ppd.transmission_delay) >
1097 GNUNET_CONSTANTS_MAX_CORK_DELAY.rel_value * 2 + GNUNET_LOAD_get_average (GSF_rt_entry_lifetime)) )
1099 /* don't have BW to send to peer, or would likely take longer than we have for it,
1100 so at best indirect the query */
1102 options |= GSF_PRO_FORWARD_ONLY;
1103 spid = GNUNET_PEER_intern (other);
1105 ttl = bound_ttl (ntohl (gm->ttl), priority);
1106 /* decrement ttl (always) */
1107 ttl_decrement = 2 * TTL_DECREMENT +
1108 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1111 (((int32_t)(ttl - ttl_decrement)) > 0) )
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1115 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
1120 GNUNET_STATISTICS_update (GSF_stats,
1121 gettext_noop ("# requests dropped due TTL underflow"),
1124 /* integer underflow => drop (should be very rare)! */
1127 ttl -= ttl_decrement;
1129 /* test if the request already exists */
1130 peerreq = GNUNET_CONTAINER_multihashmap_get (cp->request_map,
1132 if (peerreq != NULL)
1135 prd = GSF_pending_request_get_data_ (pr);
1136 if ( (prd->type == type) &&
1137 ( (type != GNUNET_BLOCK_TYPE_FS_SBLOCK) ||
1138 (0 == memcmp (&prd->namespace,
1140 sizeof (GNUNET_HashCode))) ) )
1142 if (prd->ttl.abs_value >= GNUNET_TIME_absolute_get().abs_value + ttl)
1144 /* existing request has higher TTL, drop new one! */
1145 prd->priority += priority;
1147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1148 "Have existing request with higher TTL, dropping new request.\n",
1149 GNUNET_i2s (other));
1151 GNUNET_STATISTICS_update (GSF_stats,
1152 gettext_noop ("# requests dropped due to higher-TTL request"),
1157 /* existing request has lower TTL, drop old one! */
1158 priority += prd->priority;
1159 GSF_pending_request_cancel_ (pr);
1160 GNUNET_assert (GNUNET_YES ==
1161 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
1164 if (peerreq->kill_task != GNUNET_SCHEDULER_NO_TASK)
1165 GNUNET_SCHEDULER_cancel (peerreq->kill_task);
1166 GNUNET_free (peerreq);
1170 peerreq = GNUNET_malloc (sizeof (struct PeerRequest));
1172 pr = GSF_pending_request_create_ (options,
1177 (bfsize > 0) ? (const char*)&opt[bits] : NULL,
1179 ntohl (gm->filter_mutator),
1181 (uint32_t) priority,
1184 NULL, 0, /* replies_seen */
1187 GNUNET_assert (NULL != pr);
1189 GNUNET_break (GNUNET_OK ==
1190 GNUNET_CONTAINER_multihashmap_put (cp->request_map,
1193 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1194 GNUNET_STATISTICS_update (GSF_stats,
1195 gettext_noop ("# P2P searches received"),
1198 GNUNET_STATISTICS_update (GSF_stats,
1199 gettext_noop ("# P2P searches active"),
1207 * Function called if there has been a timeout trying to satisfy
1208 * a transmission request.
1210 * @param cls the 'struct GSF_PeerTransmitHandle' of the request
1211 * @param tc scheduler context
1214 peer_transmit_timeout (void *cls,
1215 const struct GNUNET_SCHEDULER_TaskContext *tc)
1217 struct GSF_PeerTransmitHandle *pth = cls;
1218 struct GSF_ConnectedPeer *cp;
1221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1222 "Timeout trying to transmit to other peer\n");
1224 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1226 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1229 if (GNUNET_YES == pth->is_query)
1230 GNUNET_assert (0 < cp->ppd.pending_queries--);
1231 else if (GNUNET_NO == pth->is_query)
1232 GNUNET_assert (0 < cp->ppd.pending_replies--);
1233 GNUNET_LOAD_update (cp->ppd.transmission_delay,
1235 pth->gmc (pth->gmc_cls,
1242 * Transmit a message to the given peer as soon as possible.
1243 * If the peer disconnects before the transmission can happen,
1244 * the callback is invoked with a 'NULL' buffer.
1246 * @param cp target peer
1247 * @param is_query is this a query (GNUNET_YES) or content (GNUNET_NO) or neither (GNUNET_SYSERR)
1248 * @param priority how important is this request?
1249 * @param timeout when does this request timeout (call gmc with error)
1250 * @param size number of bytes we would like to send to the peer
1251 * @param gmc function to call to get the message
1252 * @param gmc_cls closure for gmc
1253 * @return handle to cancel request
1255 struct GSF_PeerTransmitHandle *
1256 GSF_peer_transmit_ (struct GSF_ConnectedPeer *cp,
1259 struct GNUNET_TIME_Relative timeout,
1261 GSF_GetMessageCallback gmc,
1264 struct GSF_PeerTransmitHandle *pth;
1265 struct GSF_PeerTransmitHandle *pos;
1266 struct GSF_PeerTransmitHandle *prev;
1268 pth = GNUNET_malloc (sizeof (struct GSF_PeerTransmitHandle));
1269 pth->transmission_request_start_time = GNUNET_TIME_absolute_get ();
1270 pth->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1272 pth->gmc_cls = gmc_cls;
1274 pth->is_query = is_query;
1275 pth->priority = priority;
1277 /* insertion sort (by priority, descending) */
1280 while ( (pos != NULL) &&
1281 (pos->priority > priority) )
1287 GNUNET_CONTAINER_DLL_insert (cp->pth_head,
1291 GNUNET_CONTAINER_DLL_insert_after (cp->pth_head,
1295 if (GNUNET_YES == is_query)
1296 cp->ppd.pending_queries++;
1297 else if (GNUNET_NO == is_query)
1298 cp->ppd.pending_replies++;
1300 pth->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
1301 &peer_transmit_timeout,
1303 schedule_transmission (pth);
1309 * Cancel an earlier request for transmission.
1311 * @param pth request to cancel
1314 GSF_peer_transmit_cancel_ (struct GSF_PeerTransmitHandle *pth)
1316 struct GSF_ConnectedPeer *cp;
1318 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1320 GNUNET_SCHEDULER_cancel (pth->timeout_task);
1321 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1323 if (NULL != pth->cth)
1325 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1329 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1332 if (GNUNET_YES == pth->is_query)
1333 GNUNET_assert (0 < cp->ppd.pending_queries--);
1334 else if (GNUNET_NO == pth->is_query)
1335 GNUNET_assert (0 < cp->ppd.pending_replies--);
1341 * Report on receiving a reply; update the performance record of the given peer.
1343 * @param cp responding peer (will be updated)
1344 * @param request_time time at which the original query was transmitted
1345 * @param request_priority priority of the original request
1348 GSF_peer_update_performance_ (struct GSF_ConnectedPeer *cp,
1349 struct GNUNET_TIME_Absolute request_time,
1350 uint32_t request_priority)
1352 struct GNUNET_TIME_Relative delay;
1354 delay = GNUNET_TIME_absolute_get_duration (request_time);
1355 cp->ppd.avg_reply_delay.rel_value = (cp->ppd.avg_reply_delay.rel_value * (RUNAVG_DELAY_N-1) + delay.rel_value) / RUNAVG_DELAY_N;
1356 cp->ppd.avg_priority = (cp->ppd.avg_priority * (RUNAVG_DELAY_N-1) + request_priority) / RUNAVG_DELAY_N;
1361 * Report on receiving a reply in response to an initiating client.
1362 * Remember that this peer is good for this client.
1364 * @param cp responding peer (will be updated)
1365 * @param initiator_client local client on responsible for query
1368 GSF_peer_update_responder_client_ (struct GSF_ConnectedPeer *cp,
1369 struct GSF_LocalClient *initiator_client)
1371 cp->ppd.last_client_replies[cp->last_client_replies_woff++ % CS2P_SUCCESS_LIST_SIZE] = initiator_client;
1376 * Report on receiving a reply in response to an initiating peer.
1377 * Remember that this peer is good for this initiating peer.
1379 * @param cp responding peer (will be updated)
1380 * @param initiator_peer other peer responsible for query
1383 GSF_peer_update_responder_peer_ (struct GSF_ConnectedPeer *cp,
1384 const struct GSF_ConnectedPeer *initiator_peer)
1386 GNUNET_PEER_change_rc (cp->ppd.last_p2p_replies[cp->last_p2p_replies_woff % P2P_SUCCESS_LIST_SIZE], -1);
1387 cp->ppd.last_p2p_replies[cp->last_p2p_replies_woff++ % P2P_SUCCESS_LIST_SIZE] = initiator_peer->ppd.pid;
1388 GNUNET_PEER_change_rc (initiator_peer->ppd.pid, 1);
1393 * Method called whenever a given peer has a status change.
1395 * @param cls closure
1396 * @param peer peer identity this notification is about
1397 * @param bandwidth_in available amount of inbound bandwidth
1398 * @param bandwidth_out available amount of outbound bandwidth
1399 * @param timeout absolute time when this peer will time out
1400 * unless we see some further activity from it
1401 * @param atsi status information
1404 GSF_peer_status_handler_ (void *cls,
1405 const struct GNUNET_PeerIdentity *peer,
1406 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1407 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
1408 struct GNUNET_TIME_Absolute timeout,
1409 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1411 struct GSF_ConnectedPeer *cp;
1413 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1415 GNUNET_assert (NULL != cp);
1416 update_atsi (cp, atsi);
1421 * Cancel all requests associated with the peer.
1424 * @param query hash code of the request
1425 * @param value the 'struct GSF_PendingRequest'
1426 * @return GNUNET_YES (continue to iterate)
1429 cancel_pending_request (void *cls,
1430 const GNUNET_HashCode *query,
1433 struct PeerRequest *peerreq = value;
1434 struct GSF_PendingRequest *pr = peerreq->pr;
1436 GSF_pending_request_cancel_ (pr);
1437 if (peerreq->kill_task != GNUNET_SCHEDULER_NO_TASK)
1438 GNUNET_SCHEDULER_cancel (peerreq->kill_task);
1439 GNUNET_free (peerreq);
1445 * A peer disconnected from us. Tear down the connected peer
1449 * @param peer identity of peer that connected
1452 GSF_peer_disconnect_handler_ (void *cls,
1453 const struct GNUNET_PeerIdentity *peer)
1455 struct GSF_ConnectedPeer *cp;
1456 struct GSF_PeerTransmitHandle *pth;
1458 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1461 return; /* must have been disconnect from core with
1462 'peer' == my_id, ignore */
1463 GNUNET_CONTAINER_multihashmap_remove (cp_map,
1466 if (NULL != cp->migration_pth)
1468 GSF_peer_transmit_cancel_ (cp->migration_pth);
1469 cp->migration_pth = NULL;
1471 if (NULL != cp->irc)
1473 GNUNET_CORE_peer_change_preference_cancel (cp->irc);
1476 if (GNUNET_SCHEDULER_NO_TASK != cp->irc_delay_task)
1478 GNUNET_SCHEDULER_cancel (cp->irc_delay_task);
1479 cp->irc_delay_task = GNUNET_SCHEDULER_NO_TASK;
1481 GNUNET_CONTAINER_multihashmap_iterate (cp->request_map,
1482 &cancel_pending_request,
1484 GNUNET_CONTAINER_multihashmap_destroy (cp->request_map);
1485 cp->request_map = NULL;
1486 GSF_plan_notify_peer_disconnect_ (cp);
1487 GNUNET_LOAD_value_free (cp->ppd.transmission_delay);
1488 GNUNET_PEER_decrement_rcs (cp->ppd.last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
1489 while (NULL != (pth = cp->pth_head))
1491 if (NULL != pth->cth)
1493 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1496 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1501 GNUNET_PEER_change_rc (cp->ppd.pid, -1);
1502 if (GNUNET_SCHEDULER_NO_TASK != cp->mig_revive_task)
1504 GNUNET_SCHEDULER_cancel (cp->mig_revive_task);
1505 cp->mig_revive_task = GNUNET_SCHEDULER_NO_TASK;
1512 * Closure for 'call_iterator'.
1514 struct IterationContext
1517 * Function to call on each entry.
1519 GSF_ConnectedPeerIterator it;
1529 * Function that calls the callback for each peer.
1531 * @param cls the 'struct IterationContext*'
1532 * @param key identity of the peer
1533 * @param value the 'struct GSF_ConnectedPeer*'
1534 * @return GNUNET_YES to continue iteration
1537 call_iterator (void *cls,
1538 const GNUNET_HashCode *key,
1541 struct IterationContext *ic = cls;
1542 struct GSF_ConnectedPeer *cp = value;
1545 (const struct GNUNET_PeerIdentity*) key,
1553 * Iterate over all connected peers.
1555 * @param it function to call for each peer
1556 * @param it_cls closure for it
1559 GSF_iterate_connected_peers_ (GSF_ConnectedPeerIterator it,
1562 struct IterationContext ic;
1566 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1573 * Obtain the identity of a connected peer.
1575 * @param cp peer to reserve bandwidth from
1576 * @param id identity to set (written to)
1579 GSF_connected_peer_get_identity_ (const struct GSF_ConnectedPeer *cp,
1580 struct GNUNET_PeerIdentity *id)
1582 GNUNET_PEER_resolve (cp->ppd.pid,
1588 * Assemble a migration stop message for transmission.
1590 * @param cls the 'struct GSF_ConnectedPeer' to use
1591 * @param size number of bytes we're allowed to write to buf
1592 * @param buf where to copy the message
1593 * @return number of bytes copied to buf
1596 create_migration_stop_message (void *cls,
1600 struct GSF_ConnectedPeer *cp = cls;
1601 struct MigrationStopMessage msm;
1603 cp->migration_pth = NULL;
1606 GNUNET_assert (size >= sizeof (struct MigrationStopMessage));
1607 msm.header.size = htons (sizeof (struct MigrationStopMessage));
1608 msm.header.type = htons (GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP);
1609 msm.reserved = htonl (0);
1610 msm.duration = GNUNET_TIME_relative_hton (GNUNET_TIME_absolute_get_remaining (cp->last_migration_block));
1611 memcpy (buf, &msm, sizeof (struct MigrationStopMessage));
1612 return sizeof (struct MigrationStopMessage);
1617 * Ask a peer to stop migrating data to us until the given point
1620 * @param cp peer to ask
1621 * @param block_time until when to block
1624 GSF_block_peer_migration_ (struct GSF_ConnectedPeer *cp,
1625 struct GNUNET_TIME_Relative block_time)
1627 if (GNUNET_TIME_absolute_get_remaining (cp->last_migration_block).rel_value > block_time.rel_value)
1630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1631 "Migration already blocked for another %llu ms\n",
1632 (unsigned long long) GNUNET_TIME_absolute_get_remaining (cp->last_migration_block).rel_value);
1634 return; /* already blocked */
1637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1638 "Asking to stop migration for %llu ms\n",
1639 (unsigned long long) block_time.rel_value);
1641 cp->last_migration_block = GNUNET_TIME_relative_to_absolute (block_time);
1642 if (cp->migration_pth != NULL)
1643 GSF_peer_transmit_cancel_ (cp->migration_pth);
1645 = GSF_peer_transmit_ (cp,
1648 GNUNET_TIME_UNIT_FOREVER_REL,
1649 sizeof (struct MigrationStopMessage),
1650 &create_migration_stop_message,
1656 * Write host-trust information to a file - flush the buffer entry!
1658 * @param cls closure, not used
1659 * @param key host identity
1660 * @param value the 'struct GSF_ConnectedPeer' to flush
1661 * @return GNUNET_OK to continue iteration
1664 flush_trust (void *cls,
1665 const GNUNET_HashCode *key,
1668 struct GSF_ConnectedPeer *cp = value;
1671 struct GNUNET_PeerIdentity pid;
1673 if (cp->ppd.trust == cp->disk_trust)
1674 return GNUNET_OK; /* unchanged */
1675 GNUNET_PEER_resolve (cp->ppd.pid,
1677 fn = get_trust_filename (&pid);
1678 if (cp->ppd.trust == 0)
1680 if ((0 != UNLINK (fn)) && (errno != ENOENT))
1681 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING |
1682 GNUNET_ERROR_TYPE_BULK, "unlink", fn);
1686 trust = htonl (cp->ppd.trust);
1687 if (sizeof(uint32_t) == GNUNET_DISK_fn_write (fn, &trust,
1689 GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE
1690 | GNUNET_DISK_PERM_GROUP_READ | GNUNET_DISK_PERM_OTHER_READ))
1691 cp->disk_trust = cp->ppd.trust;
1699 * Notify core about a preference we have for the given peer
1700 * (to allocate more resources towards it). The change will
1701 * be communicated the next time we reserve bandwidth with
1702 * core (not instantly).
1704 * @param cp peer to reserve bandwidth from
1705 * @param pref preference change
1708 GSF_connected_peer_change_preference_ (struct GSF_ConnectedPeer *cp,
1711 cp->inc_preference += pref;
1716 * Call this method periodically to flush trust information to disk.
1718 * @param cls closure, not used
1719 * @param tc task context, not used
1722 cron_flush_trust (void *cls,
1723 const struct GNUNET_SCHEDULER_TaskContext *tc)
1728 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1733 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1735 GNUNET_SCHEDULER_add_delayed (TRUST_FLUSH_FREQ,
1742 * Initialize peer management subsystem.
1745 GSF_connected_peer_init_ ()
1747 cp_map = GNUNET_CONTAINER_multihashmap_create (128);
1748 GNUNET_assert (GNUNET_OK ==
1749 GNUNET_CONFIGURATION_get_value_filename (GSF_cfg,
1753 GNUNET_DISK_directory_create (trustDirectory);
1754 GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_HIGH,
1755 &cron_flush_trust, NULL);
1760 * Iterator to free peer entries.
1762 * @param cls closure, unused
1763 * @param key current key code
1764 * @param value value in the hash map (peer entry)
1765 * @return GNUNET_YES (we should continue to iterate)
1768 clean_peer (void *cls,
1769 const GNUNET_HashCode * key,
1772 GSF_peer_disconnect_handler_ (NULL,
1773 (const struct GNUNET_PeerIdentity*) key);
1779 * Shutdown peer management subsystem.
1782 GSF_connected_peer_done_ ()
1784 cron_flush_trust (NULL, NULL);
1785 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1788 GNUNET_CONTAINER_multihashmap_destroy (cp_map);
1790 GNUNET_free (trustDirectory);
1791 trustDirectory = NULL;
1796 * Iterator to remove references to LC entry.
1798 * @param cls the 'struct GSF_LocalClient*' to look for
1799 * @param key current key code
1800 * @param value value in the hash map (peer entry)
1801 * @return GNUNET_YES (we should continue to iterate)
1804 clean_local_client (void *cls,
1805 const GNUNET_HashCode * key,
1808 const struct GSF_LocalClient *lc = cls;
1809 struct GSF_ConnectedPeer *cp = value;
1812 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
1813 if (cp->ppd.last_client_replies[i] == lc)
1814 cp->ppd.last_client_replies[i] = NULL;
1820 * Notification that a local client disconnected. Clean up all of our
1821 * references to the given handle.
1823 * @param lc handle to the local client (henceforth invalid)
1826 GSF_handle_local_client_disconnect_ (const struct GSF_LocalClient *lc)
1829 return; /* already cleaned up */
1830 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1831 &clean_local_client,
1836 /* end of gnunet-service-fs_cp.c */