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_PeerTransmitHandle *pos;
421 struct GSF_ConnectedPeer *cp;
424 GNUNET_assert ( (NULL == buf) ||
425 (pth->size <= size) );
427 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
429 GNUNET_SCHEDULER_cancel (pth->timeout_task);
430 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
433 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
436 if (GNUNET_YES == pth->is_query)
438 cp->ppd.last_request_times[(cp->last_request_times_off++) % MAX_QUEUE_PER_PEER] = GNUNET_TIME_absolute_get ();
439 GNUNET_assert (0 < cp->ppd.pending_queries--);
441 else if (GNUNET_NO == pth->is_query)
443 GNUNET_assert (0 < cp->ppd.pending_replies--);
445 GNUNET_LOAD_update (cp->ppd.transmission_delay,
446 GNUNET_TIME_absolute_get_duration (pth->transmission_request_start_time).rel_value);
447 ret = pth->gmc (pth->gmc_cls,
449 GNUNET_assert (NULL == pth->cth);
450 for (pos = cp->pth_head; pos != NULL; pos = pos->next)
452 GNUNET_assert (pos != pth);
453 schedule_transmission (pos);
461 * (re)try to reserve bandwidth from the given peer.
463 * @param cls the 'struct GSF_ConnectedPeer' to reserve from
464 * @param tc scheduler context
467 retry_reservation (void *cls,
468 const struct GNUNET_SCHEDULER_TaskContext *tc)
470 struct GSF_ConnectedPeer *cp = cls;
472 struct GNUNET_PeerIdentity target;
474 GNUNET_PEER_resolve (cp->ppd.pid,
476 cp->irc_delay_task = GNUNET_SCHEDULER_NO_TASK;
477 ip = cp->inc_preference;
478 cp->inc_preference = 0;
479 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
481 GNUNET_TIME_UNIT_FOREVER_REL,
482 GNUNET_BANDWIDTH_VALUE_MAX,
485 &core_reserve_callback,
491 * Function called by core upon success or failure of our bandwidth reservation request.
493 * @param cls the 'struct GSF_ConnectedPeer' of the peer for which we made the request
494 * @param peer identifies the peer
495 * @param bandwidth_out available amount of outbound bandwidth
496 * @param amount set to the amount that was actually reserved or unreserved;
497 * either the full requested amount or zero (no partial reservations)
498 * @param res_delay if the reservation could not be satisfied (amount was 0), how
499 * long should the client wait until re-trying?
500 * @param preference current traffic preference for the given peer
503 core_reserve_callback (void *cls,
504 const struct GNUNET_PeerIdentity *peer,
505 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
507 struct GNUNET_TIME_Relative res_delay,
510 struct GSF_ConnectedPeer *cp = cls;
511 struct GSF_PeerTransmitHandle *pth;
516 cp->irc_delay_task = GNUNET_SCHEDULER_add_delayed (res_delay,
521 cp->did_reserve = GNUNET_YES;
523 if ( (NULL != pth) &&
526 /* reservation success, try transmission now! */
527 pth->cth = GNUNET_CORE_notify_transmit_ready (GSF_core,
530 GNUNET_TIME_absolute_get_remaining (pth->timeout),
533 &peer_transmit_ready_cb,
540 * A peer connected to us. Setup the connected peer
543 * @param peer identity of peer that connected
544 * @param atsi performance data for the connection
545 * @return handle to connected peer entry
547 struct GSF_ConnectedPeer *
548 GSF_peer_connect_handler_ (const struct GNUNET_PeerIdentity *peer,
549 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
551 struct GSF_ConnectedPeer *cp;
555 cp = GNUNET_malloc (sizeof (struct GSF_ConnectedPeer));
556 cp->ppd.pid = GNUNET_PEER_intern (peer);
557 cp->ppd.transmission_delay = GNUNET_LOAD_value_init (GNUNET_TIME_UNIT_ZERO);
558 cp->irc = GNUNET_CORE_peer_change_preference (GSF_core,
560 GNUNET_TIME_UNIT_FOREVER_REL,
561 GNUNET_BANDWIDTH_VALUE_MAX,
564 &core_reserve_callback,
566 fn = get_trust_filename (peer);
567 if ((GNUNET_DISK_file_test (fn) == GNUNET_YES) &&
568 (sizeof (trust) == GNUNET_DISK_fn_read (fn, &trust, sizeof (trust))))
569 cp->disk_trust = cp->ppd.trust = ntohl (trust);
571 cp->request_map = GNUNET_CONTAINER_multihashmap_create (128);
572 GNUNET_break (GNUNET_OK ==
573 GNUNET_CONTAINER_multihashmap_put (cp_map,
576 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
577 update_atsi (cp, atsi);
578 GSF_push_start_ (cp);
584 * It may be time to re-start migrating content to this
585 * peer. Check, and if so, restart migration.
587 * @param cls the 'struct GSF_ConnectedPeer'
588 * @param tc scheduler context
591 revive_migration (void *cls,
592 const struct GNUNET_SCHEDULER_TaskContext *tc)
594 struct GSF_ConnectedPeer *cp = cls;
595 struct GNUNET_TIME_Relative bt;
597 cp->mig_revive_task = GNUNET_SCHEDULER_NO_TASK;
598 bt = GNUNET_TIME_absolute_get_remaining (cp->ppd.migration_blocked_until);
599 if (0 != bt.rel_value)
601 /* still time left... */
603 = GNUNET_SCHEDULER_add_delayed (bt,
608 GSF_push_start_ (cp);
613 * Get a handle for a connected peer.
615 * @param peer peer's identity
616 * @return NULL if the peer is not currently connected
618 struct GSF_ConnectedPeer *
619 GSF_peer_get_ (const struct GNUNET_PeerIdentity *peer)
621 return GNUNET_CONTAINER_multihashmap_get (cp_map,
627 * Handle P2P "MIGRATION_STOP" message.
629 * @param cls closure, always NULL
630 * @param other the other peer involved (sender or receiver, NULL
631 * for loopback messages where we are both sender and receiver)
632 * @param message the actual message
633 * @param atsi performance information
634 * @return GNUNET_OK to keep the connection open,
635 * GNUNET_SYSERR to close it (signal serious error)
638 GSF_handle_p2p_migration_stop_ (void *cls,
639 const struct GNUNET_PeerIdentity *other,
640 const struct GNUNET_MessageHeader *message,
641 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
643 struct GSF_ConnectedPeer *cp;
644 const struct MigrationStopMessage *msm;
645 struct GNUNET_TIME_Relative bt;
647 msm = (const struct MigrationStopMessage*) message;
648 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
655 bt = GNUNET_TIME_relative_ntoh (msm->duration);
656 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
657 _("Migration of content to peer `%s' blocked for %llu ms\n"),
659 (unsigned long long) bt.rel_value);
660 cp->ppd.migration_blocked_until = GNUNET_TIME_relative_to_absolute (bt);
661 if (cp->mig_revive_task == GNUNET_SCHEDULER_NO_TASK)
665 = GNUNET_SCHEDULER_add_delayed (bt,
669 update_atsi (cp, atsi);
675 * Copy reply and free put message.
677 * @param cls the 'struct PutMessage'
678 * @param buf_size number of bytes available in buf
679 * @param buf where to copy the message, NULL on error (peer disconnect)
680 * @return number of bytes copied to 'buf', can be 0 (without indicating an error)
683 copy_reply (void *cls,
687 struct PutMessage *pm = cls;
692 GNUNET_assert (buf_size >= ntohs (pm->header.size));
693 size = ntohs (pm->header.size);
694 memcpy (buf, pm, size);
695 GNUNET_STATISTICS_update (GSF_stats,
696 gettext_noop ("# replies transmitted to other peers"),
703 GNUNET_STATISTICS_update (GSF_stats,
704 gettext_noop ("# replies dropped"),
714 * Free the given request.
716 * @param cls the request to free
717 * @param tc task context
720 peer_request_destroy (void *cls,
721 const struct GNUNET_SCHEDULER_TaskContext *tc)
723 struct PeerRequest *peerreq = cls;
724 struct GSF_PendingRequest *pr = peerreq->pr;
725 struct GSF_ConnectedPeer *cp = peerreq->cp;
726 struct GSF_PendingRequestData *prd;
728 peerreq->kill_task = GNUNET_SCHEDULER_NO_TASK;
729 prd = GSF_pending_request_get_data_ (pr);
730 GNUNET_STATISTICS_update (GSF_stats,
731 gettext_noop ("# P2P searches active"),
734 GNUNET_break (GNUNET_OK ==
735 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
738 GSF_pending_request_cancel_ (pr);
739 GNUNET_free (peerreq);
744 * Handle a reply to a pending request. Also called if a request
745 * expires (then with data == NULL). The handler may be called
746 * many times (depending on the request type), but will not be
747 * called during or after a call to GSF_pending_request_cancel
748 * and will also not be called anymore after a call signalling
751 * @param cls 'struct PeerRequest' this is an answer for
752 * @param eval evaluation of the result
753 * @param pr handle to the original pending request
754 * @param expiration when does 'data' expire?
755 * @param type type of the block
756 * @param data response data, NULL on request expiration
757 * @param data_len number of bytes in data
760 handle_p2p_reply (void *cls,
761 enum GNUNET_BLOCK_EvaluationResult eval,
762 struct GSF_PendingRequest *pr,
763 struct GNUNET_TIME_Absolute expiration,
764 enum GNUNET_BLOCK_Type type,
768 struct PeerRequest *peerreq = cls;
769 struct GSF_ConnectedPeer *cp = peerreq->cp;
770 struct GSF_PendingRequestData *prd;
771 struct PutMessage *pm;
774 GNUNET_assert (data_len + sizeof (struct PutMessage) < GNUNET_SERVER_MAX_MESSAGE_SIZE);
775 GNUNET_assert (peerreq->pr == pr);
776 prd = GSF_pending_request_get_data_ (pr);
779 GNUNET_STATISTICS_update (GSF_stats,
780 gettext_noop ("# P2P searches active"),
783 GNUNET_break (GNUNET_OK ==
784 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
787 GNUNET_free (peerreq);
790 GNUNET_break (type != GNUNET_BLOCK_TYPE_ANY);
791 if ( (prd->type != type) &&
792 (prd->type != GNUNET_BLOCK_TYPE_ANY) )
798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
799 "Transmitting result for query `%s' to peer\n",
800 GNUNET_h2s (&prd->query));
802 GNUNET_STATISTICS_update (GSF_stats,
803 gettext_noop ("# replies received for other peers"),
806 msize = sizeof (struct PutMessage) + data_len;
807 if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
812 pm = GNUNET_malloc (msize);
813 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
814 pm->header.size = htons (msize);
815 pm->type = htonl (type);
816 pm->expiration = GNUNET_TIME_absolute_hton (expiration);
817 memcpy (&pm[1], data, data_len);
818 (void) GSF_peer_transmit_ (cp, GNUNET_NO,
824 if (eval != GNUNET_BLOCK_EVALUATION_OK_LAST)
826 peerreq->kill_task = GNUNET_SCHEDULER_add_now (&peer_request_destroy,
832 * Increase the host credit by a value.
834 * @param cp which peer to change the trust value on
835 * @param value is the int value by which the
836 * host credit is to be increased or decreased
837 * @returns the actual change in trust (positive or negative)
840 change_host_trust (struct GSF_ConnectedPeer *cp, int value)
844 GNUNET_assert (cp != NULL);
847 if (cp->ppd.trust + value < cp->ppd.trust)
849 value = UINT32_MAX - cp->ppd.trust;
850 cp->ppd.trust = UINT32_MAX;
853 cp->ppd.trust += value;
857 if (cp->ppd.trust < -value)
859 value = -cp->ppd.trust;
863 cp->ppd.trust += value;
870 * We've received a request with the specified priority. Bound it
871 * according to how much we trust the given peer.
873 * @param prio_in requested priority
874 * @param cp the peer making the request
875 * @return effective priority
878 bound_priority (uint32_t prio_in,
879 struct GSF_ConnectedPeer *cp)
881 #define N ((double)128.0)
886 ld = GSF_test_get_load_too_high_ (0);
887 if (ld == GNUNET_SYSERR)
889 GNUNET_STATISTICS_update (GSF_stats,
890 gettext_noop ("# requests done for free (low load)"),
893 return 0; /* excess resources */
895 if (prio_in > INT32_MAX)
897 ret = - change_host_trust (cp, - (int) prio_in);
900 if (ret > GSF_current_priorities + N)
901 rret = GSF_current_priorities + N;
904 GSF_current_priorities
905 = (GSF_current_priorities * (N-1) + rret)/N;
907 if ( (ld == GNUNET_YES) && (ret > 0) )
909 /* try with charging */
910 ld = GSF_test_get_load_too_high_ (ret);
912 if (ld == GNUNET_YES)
914 GNUNET_STATISTICS_update (GSF_stats,
915 gettext_noop ("# request dropped, priority insufficient"),
919 change_host_trust (cp, (int) ret);
920 return -1; /* not enough resources */
924 GNUNET_STATISTICS_update (GSF_stats,
925 gettext_noop ("# requests done for a price (normal load)"),
935 * The priority level imposes a bound on the maximum
936 * value for the ttl that can be requested.
938 * @param ttl_in requested ttl
939 * @param prio given priority
940 * @return ttl_in if ttl_in is below the limit,
941 * otherwise the ttl-limit for the given priority
944 bound_ttl (int32_t ttl_in, uint32_t prio)
946 unsigned long long allowed;
950 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
951 if (ttl_in > allowed)
953 if (allowed >= (1 << 30))
962 * Handle P2P "QUERY" message. Creates the pending request entry
963 * and sets up all of the data structures to that we will
964 * process replies properly. Does not initiate forwarding or
965 * local database lookups.
967 * @param other the other peer involved (sender or receiver, NULL
968 * for loopback messages where we are both sender and receiver)
969 * @param message the actual message
970 * @return pending request handle, NULL on error
972 struct GSF_PendingRequest *
973 GSF_handle_p2p_query_ (const struct GNUNET_PeerIdentity *other,
974 const struct GNUNET_MessageHeader *message)
976 struct PeerRequest *peerreq;
977 struct GSF_PendingRequest *pr;
978 struct GSF_PendingRequestData *prd;
979 struct GSF_ConnectedPeer *cp;
980 struct GSF_ConnectedPeer *cps;
981 const GNUNET_HashCode *namespace;
982 const struct GNUNET_PeerIdentity *target;
983 enum GSF_PendingRequestOptions options;
985 const struct GetMessage *gm;
987 const GNUNET_HashCode *opt;
990 uint32_t ttl_decrement;
993 enum GNUNET_BLOCK_Type type;
996 msize = ntohs(message->size);
997 if (msize < sizeof (struct GetMessage))
1002 gm = (const struct GetMessage*) message;
1003 type = ntohl (gm->type);
1004 bm = ntohl (gm->hash_bitmap);
1012 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
1014 GNUNET_break_op (0);
1017 opt = (const GNUNET_HashCode*) &gm[1];
1018 bfsize = msize - sizeof (struct GetMessage) - bits * sizeof (GNUNET_HashCode);
1019 /* bfsize must be power of 2, check! */
1020 if (0 != ( (bfsize - 1) & bfsize))
1022 GNUNET_break_op (0);
1025 GSF_cover_query_count++;
1026 bm = ntohl (gm->hash_bitmap);
1028 cps = GNUNET_CONTAINER_multihashmap_get (cp_map,
1029 &other->hashPubKey);
1032 /* peer must have just disconnected */
1033 GNUNET_STATISTICS_update (GSF_stats,
1034 gettext_noop ("# requests dropped due to initiator not being connected"),
1039 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1040 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1047 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1049 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
1050 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
1053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1054 "Failed to find peer `%4s' in connection set. Dropping query.\n",
1055 GNUNET_i2s (other));
1057 GNUNET_STATISTICS_update (GSF_stats,
1058 gettext_noop ("# requests dropped due to missing reverse route"),
1063 /* note that we can really only check load here since otherwise
1064 peers could find out that we are overloaded by not being
1065 disconnected after sending us a malformed query... */
1066 priority = bound_priority (ntohl (gm->priority), cps);
1070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1071 "Dropping query from `%s', this peer is too busy.\n",
1072 GNUNET_i2s (other));
1077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1078 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
1079 GNUNET_h2s (&gm->query),
1080 (unsigned int) type,
1084 namespace = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) ? &opt[bits++] : NULL;
1085 if ( (type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
1086 (namespace == NULL) )
1088 GNUNET_break_op (0);
1091 if ( (type != GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
1092 (namespace != NULL) )
1094 GNUNET_break_op (0);
1097 target = (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO)) ? ((const struct GNUNET_PeerIdentity*) &opt[bits++]) : NULL;
1100 if ( (GNUNET_LOAD_get_load (cp->ppd.transmission_delay) > 3 * (1 + priority)) ||
1101 (GNUNET_LOAD_get_average (cp->ppd.transmission_delay) >
1102 GNUNET_CONSTANTS_MAX_CORK_DELAY.rel_value * 2 + GNUNET_LOAD_get_average (GSF_rt_entry_lifetime)) )
1104 /* don't have BW to send to peer, or would likely take longer than we have for it,
1105 so at best indirect the query */
1107 options |= GSF_PRO_FORWARD_ONLY;
1108 spid = GNUNET_PEER_intern (other);
1110 ttl = bound_ttl (ntohl (gm->ttl), priority);
1111 /* decrement ttl (always) */
1112 ttl_decrement = 2 * TTL_DECREMENT +
1113 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1116 (((int32_t)(ttl - ttl_decrement)) > 0) )
1119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1120 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
1125 GNUNET_STATISTICS_update (GSF_stats,
1126 gettext_noop ("# requests dropped due TTL underflow"),
1129 /* integer underflow => drop (should be very rare)! */
1132 ttl -= ttl_decrement;
1134 /* test if the request already exists */
1135 peerreq = GNUNET_CONTAINER_multihashmap_get (cp->request_map,
1137 if (peerreq != NULL)
1140 prd = GSF_pending_request_get_data_ (pr);
1141 if ( (prd->type == type) &&
1142 ( (type != GNUNET_BLOCK_TYPE_FS_SBLOCK) ||
1143 (0 == memcmp (&prd->namespace,
1145 sizeof (GNUNET_HashCode))) ) )
1147 if (prd->ttl.abs_value >= GNUNET_TIME_absolute_get().abs_value + ttl)
1149 /* existing request has higher TTL, drop new one! */
1150 prd->priority += priority;
1152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1153 "Have existing request with higher TTL, dropping new request.\n",
1154 GNUNET_i2s (other));
1156 GNUNET_STATISTICS_update (GSF_stats,
1157 gettext_noop ("# requests dropped due to higher-TTL request"),
1162 /* existing request has lower TTL, drop old one! */
1163 priority += prd->priority;
1164 GSF_pending_request_cancel_ (pr);
1165 GNUNET_assert (GNUNET_YES ==
1166 GNUNET_CONTAINER_multihashmap_remove (cp->request_map,
1169 if (peerreq->kill_task != GNUNET_SCHEDULER_NO_TASK)
1170 GNUNET_SCHEDULER_cancel (peerreq->kill_task);
1171 GNUNET_free (peerreq);
1175 peerreq = GNUNET_malloc (sizeof (struct PeerRequest));
1177 pr = GSF_pending_request_create_ (options,
1182 (bfsize > 0) ? (const char*)&opt[bits] : NULL,
1184 ntohl (gm->filter_mutator),
1186 (uint32_t) priority,
1189 NULL, 0, /* replies_seen */
1192 GNUNET_assert (NULL != pr);
1194 GNUNET_break (GNUNET_OK ==
1195 GNUNET_CONTAINER_multihashmap_put (cp->request_map,
1198 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1199 GNUNET_STATISTICS_update (GSF_stats,
1200 gettext_noop ("# P2P searches received"),
1203 GNUNET_STATISTICS_update (GSF_stats,
1204 gettext_noop ("# P2P searches active"),
1212 * Function called if there has been a timeout trying to satisfy
1213 * a transmission request.
1215 * @param cls the 'struct GSF_PeerTransmitHandle' of the request
1216 * @param tc scheduler context
1219 peer_transmit_timeout (void *cls,
1220 const struct GNUNET_SCHEDULER_TaskContext *tc)
1222 struct GSF_PeerTransmitHandle *pth = cls;
1223 struct GSF_ConnectedPeer *cp;
1226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1227 "Timeout trying to transmit to other peer\n");
1229 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1231 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1234 if (GNUNET_YES == pth->is_query)
1235 GNUNET_assert (0 < cp->ppd.pending_queries--);
1236 else if (GNUNET_NO == pth->is_query)
1237 GNUNET_assert (0 < cp->ppd.pending_replies--);
1238 GNUNET_LOAD_update (cp->ppd.transmission_delay,
1240 if (NULL != pth->cth)
1242 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1245 pth->gmc (pth->gmc_cls,
1252 * Transmit a message to the given peer as soon as possible.
1253 * If the peer disconnects before the transmission can happen,
1254 * the callback is invoked with a 'NULL' buffer.
1256 * @param cp target peer
1257 * @param is_query is this a query (GNUNET_YES) or content (GNUNET_NO) or neither (GNUNET_SYSERR)
1258 * @param priority how important is this request?
1259 * @param timeout when does this request timeout (call gmc with error)
1260 * @param size number of bytes we would like to send to the peer
1261 * @param gmc function to call to get the message
1262 * @param gmc_cls closure for gmc
1263 * @return handle to cancel request
1265 struct GSF_PeerTransmitHandle *
1266 GSF_peer_transmit_ (struct GSF_ConnectedPeer *cp,
1269 struct GNUNET_TIME_Relative timeout,
1271 GSF_GetMessageCallback gmc,
1274 struct GSF_PeerTransmitHandle *pth;
1275 struct GSF_PeerTransmitHandle *pos;
1276 struct GSF_PeerTransmitHandle *prev;
1278 pth = GNUNET_malloc (sizeof (struct GSF_PeerTransmitHandle));
1279 pth->transmission_request_start_time = GNUNET_TIME_absolute_get ();
1280 pth->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1282 pth->gmc_cls = gmc_cls;
1284 pth->is_query = is_query;
1285 pth->priority = priority;
1287 /* insertion sort (by priority, descending) */
1290 while ( (pos != NULL) &&
1291 (pos->priority > priority) )
1297 GNUNET_CONTAINER_DLL_insert (cp->pth_head,
1301 GNUNET_CONTAINER_DLL_insert_after (cp->pth_head,
1305 if (GNUNET_YES == is_query)
1306 cp->ppd.pending_queries++;
1307 else if (GNUNET_NO == is_query)
1308 cp->ppd.pending_replies++;
1309 pth->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
1310 &peer_transmit_timeout,
1312 schedule_transmission (pth);
1318 * Cancel an earlier request for transmission.
1320 * @param pth request to cancel
1323 GSF_peer_transmit_cancel_ (struct GSF_PeerTransmitHandle *pth)
1325 struct GSF_ConnectedPeer *cp;
1327 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1329 GNUNET_SCHEDULER_cancel (pth->timeout_task);
1330 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1332 if (NULL != pth->cth)
1334 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1338 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1341 if (GNUNET_YES == pth->is_query)
1342 GNUNET_assert (0 < cp->ppd.pending_queries--);
1343 else if (GNUNET_NO == pth->is_query)
1344 GNUNET_assert (0 < cp->ppd.pending_replies--);
1350 * Report on receiving a reply; update the performance record of the given peer.
1352 * @param cp responding peer (will be updated)
1353 * @param request_time time at which the original query was transmitted
1354 * @param request_priority priority of the original request
1357 GSF_peer_update_performance_ (struct GSF_ConnectedPeer *cp,
1358 struct GNUNET_TIME_Absolute request_time,
1359 uint32_t request_priority)
1361 struct GNUNET_TIME_Relative delay;
1363 delay = GNUNET_TIME_absolute_get_duration (request_time);
1364 cp->ppd.avg_reply_delay.rel_value = (cp->ppd.avg_reply_delay.rel_value * (RUNAVG_DELAY_N-1) + delay.rel_value) / RUNAVG_DELAY_N;
1365 cp->ppd.avg_priority = (cp->ppd.avg_priority * (RUNAVG_DELAY_N-1) + request_priority) / RUNAVG_DELAY_N;
1370 * Report on receiving a reply in response to an initiating client.
1371 * Remember that this peer is good for this client.
1373 * @param cp responding peer (will be updated)
1374 * @param initiator_client local client on responsible for query
1377 GSF_peer_update_responder_client_ (struct GSF_ConnectedPeer *cp,
1378 struct GSF_LocalClient *initiator_client)
1380 cp->ppd.last_client_replies[cp->last_client_replies_woff++ % CS2P_SUCCESS_LIST_SIZE] = initiator_client;
1385 * Report on receiving a reply in response to an initiating peer.
1386 * Remember that this peer is good for this initiating peer.
1388 * @param cp responding peer (will be updated)
1389 * @param initiator_peer other peer responsible for query
1392 GSF_peer_update_responder_peer_ (struct GSF_ConnectedPeer *cp,
1393 const struct GSF_ConnectedPeer *initiator_peer)
1395 GNUNET_PEER_change_rc (cp->ppd.last_p2p_replies[cp->last_p2p_replies_woff % P2P_SUCCESS_LIST_SIZE], -1);
1396 cp->ppd.last_p2p_replies[cp->last_p2p_replies_woff++ % P2P_SUCCESS_LIST_SIZE] = initiator_peer->ppd.pid;
1397 GNUNET_PEER_change_rc (initiator_peer->ppd.pid, 1);
1402 * Method called whenever a given peer has a status change.
1404 * @param cls closure
1405 * @param peer peer identity this notification is about
1406 * @param bandwidth_in available amount of inbound bandwidth
1407 * @param bandwidth_out available amount of outbound bandwidth
1408 * @param timeout absolute time when this peer will time out
1409 * unless we see some further activity from it
1410 * @param atsi status information
1413 GSF_peer_status_handler_ (void *cls,
1414 const struct GNUNET_PeerIdentity *peer,
1415 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1416 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
1417 struct GNUNET_TIME_Absolute timeout,
1418 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1420 struct GSF_ConnectedPeer *cp;
1422 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1424 GNUNET_assert (NULL != cp);
1425 update_atsi (cp, atsi);
1430 * Cancel all requests associated with the peer.
1433 * @param query hash code of the request
1434 * @param value the 'struct GSF_PendingRequest'
1435 * @return GNUNET_YES (continue to iterate)
1438 cancel_pending_request (void *cls,
1439 const GNUNET_HashCode *query,
1442 struct PeerRequest *peerreq = value;
1443 struct GSF_PendingRequest *pr = peerreq->pr;
1445 GSF_pending_request_cancel_ (pr);
1446 if (peerreq->kill_task != GNUNET_SCHEDULER_NO_TASK)
1447 GNUNET_SCHEDULER_cancel (peerreq->kill_task);
1448 GNUNET_free (peerreq);
1454 * A peer disconnected from us. Tear down the connected peer
1458 * @param peer identity of peer that connected
1461 GSF_peer_disconnect_handler_ (void *cls,
1462 const struct GNUNET_PeerIdentity *peer)
1464 struct GSF_ConnectedPeer *cp;
1465 struct GSF_PeerTransmitHandle *pth;
1467 cp = GNUNET_CONTAINER_multihashmap_get (cp_map,
1470 return; /* must have been disconnect from core with
1471 'peer' == my_id, ignore */
1472 GNUNET_CONTAINER_multihashmap_remove (cp_map,
1475 if (NULL != cp->migration_pth)
1477 GSF_peer_transmit_cancel_ (cp->migration_pth);
1478 cp->migration_pth = NULL;
1480 if (NULL != cp->irc)
1482 GNUNET_CORE_peer_change_preference_cancel (cp->irc);
1485 if (GNUNET_SCHEDULER_NO_TASK != cp->irc_delay_task)
1487 GNUNET_SCHEDULER_cancel (cp->irc_delay_task);
1488 cp->irc_delay_task = GNUNET_SCHEDULER_NO_TASK;
1490 GNUNET_CONTAINER_multihashmap_iterate (cp->request_map,
1491 &cancel_pending_request,
1493 GNUNET_CONTAINER_multihashmap_destroy (cp->request_map);
1494 cp->request_map = NULL;
1495 GSF_plan_notify_peer_disconnect_ (cp);
1496 GNUNET_LOAD_value_free (cp->ppd.transmission_delay);
1497 GNUNET_PEER_decrement_rcs (cp->ppd.last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
1498 while (NULL != (pth = cp->pth_head))
1500 if (NULL != pth->cth)
1502 GNUNET_CORE_notify_transmit_ready_cancel (pth->cth);
1505 if (pth->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1507 GNUNET_SCHEDULER_cancel (pth->timeout_task);
1508 pth->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1510 GNUNET_CONTAINER_DLL_remove (cp->pth_head,
1515 GNUNET_PEER_change_rc (cp->ppd.pid, -1);
1516 if (GNUNET_SCHEDULER_NO_TASK != cp->mig_revive_task)
1518 GNUNET_SCHEDULER_cancel (cp->mig_revive_task);
1519 cp->mig_revive_task = GNUNET_SCHEDULER_NO_TASK;
1526 * Closure for 'call_iterator'.
1528 struct IterationContext
1531 * Function to call on each entry.
1533 GSF_ConnectedPeerIterator it;
1543 * Function that calls the callback for each peer.
1545 * @param cls the 'struct IterationContext*'
1546 * @param key identity of the peer
1547 * @param value the 'struct GSF_ConnectedPeer*'
1548 * @return GNUNET_YES to continue iteration
1551 call_iterator (void *cls,
1552 const GNUNET_HashCode *key,
1555 struct IterationContext *ic = cls;
1556 struct GSF_ConnectedPeer *cp = value;
1559 (const struct GNUNET_PeerIdentity*) key,
1567 * Iterate over all connected peers.
1569 * @param it function to call for each peer
1570 * @param it_cls closure for it
1573 GSF_iterate_connected_peers_ (GSF_ConnectedPeerIterator it,
1576 struct IterationContext ic;
1580 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1587 * Obtain the identity of a connected peer.
1589 * @param cp peer to reserve bandwidth from
1590 * @param id identity to set (written to)
1593 GSF_connected_peer_get_identity_ (const struct GSF_ConnectedPeer *cp,
1594 struct GNUNET_PeerIdentity *id)
1596 GNUNET_PEER_resolve (cp->ppd.pid,
1602 * Assemble a migration stop message for transmission.
1604 * @param cls the 'struct GSF_ConnectedPeer' to use
1605 * @param size number of bytes we're allowed to write to buf
1606 * @param buf where to copy the message
1607 * @return number of bytes copied to buf
1610 create_migration_stop_message (void *cls,
1614 struct GSF_ConnectedPeer *cp = cls;
1615 struct MigrationStopMessage msm;
1617 cp->migration_pth = NULL;
1620 GNUNET_assert (size >= sizeof (struct MigrationStopMessage));
1621 msm.header.size = htons (sizeof (struct MigrationStopMessage));
1622 msm.header.type = htons (GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP);
1623 msm.reserved = htonl (0);
1624 msm.duration = GNUNET_TIME_relative_hton (GNUNET_TIME_absolute_get_remaining (cp->last_migration_block));
1625 memcpy (buf, &msm, sizeof (struct MigrationStopMessage));
1626 return sizeof (struct MigrationStopMessage);
1631 * Ask a peer to stop migrating data to us until the given point
1634 * @param cp peer to ask
1635 * @param block_time until when to block
1638 GSF_block_peer_migration_ (struct GSF_ConnectedPeer *cp,
1639 struct GNUNET_TIME_Relative block_time)
1641 if (GNUNET_TIME_absolute_get_remaining (cp->last_migration_block).rel_value > block_time.rel_value)
1644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1645 "Migration already blocked for another %llu ms\n",
1646 (unsigned long long) GNUNET_TIME_absolute_get_remaining (cp->last_migration_block).rel_value);
1648 return; /* already blocked */
1651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1652 "Asking to stop migration for %llu ms\n",
1653 (unsigned long long) block_time.rel_value);
1655 cp->last_migration_block = GNUNET_TIME_relative_to_absolute (block_time);
1656 if (cp->migration_pth != NULL)
1657 GSF_peer_transmit_cancel_ (cp->migration_pth);
1659 = GSF_peer_transmit_ (cp,
1662 GNUNET_TIME_UNIT_FOREVER_REL,
1663 sizeof (struct MigrationStopMessage),
1664 &create_migration_stop_message,
1670 * Write host-trust information to a file - flush the buffer entry!
1672 * @param cls closure, not used
1673 * @param key host identity
1674 * @param value the 'struct GSF_ConnectedPeer' to flush
1675 * @return GNUNET_OK to continue iteration
1678 flush_trust (void *cls,
1679 const GNUNET_HashCode *key,
1682 struct GSF_ConnectedPeer *cp = value;
1685 struct GNUNET_PeerIdentity pid;
1687 if (cp->ppd.trust == cp->disk_trust)
1688 return GNUNET_OK; /* unchanged */
1689 GNUNET_PEER_resolve (cp->ppd.pid,
1691 fn = get_trust_filename (&pid);
1692 if (cp->ppd.trust == 0)
1694 if ((0 != UNLINK (fn)) && (errno != ENOENT))
1695 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING |
1696 GNUNET_ERROR_TYPE_BULK, "unlink", fn);
1700 trust = htonl (cp->ppd.trust);
1701 if (sizeof(uint32_t) == GNUNET_DISK_fn_write (fn, &trust,
1703 GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE
1704 | GNUNET_DISK_PERM_GROUP_READ | GNUNET_DISK_PERM_OTHER_READ))
1705 cp->disk_trust = cp->ppd.trust;
1713 * Notify core about a preference we have for the given peer
1714 * (to allocate more resources towards it). The change will
1715 * be communicated the next time we reserve bandwidth with
1716 * core (not instantly).
1718 * @param cp peer to reserve bandwidth from
1719 * @param pref preference change
1722 GSF_connected_peer_change_preference_ (struct GSF_ConnectedPeer *cp,
1725 cp->inc_preference += pref;
1730 * Call this method periodically to flush trust information to disk.
1732 * @param cls closure, not used
1733 * @param tc task context, not used
1736 cron_flush_trust (void *cls,
1737 const struct GNUNET_SCHEDULER_TaskContext *tc)
1742 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1747 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1749 GNUNET_SCHEDULER_add_delayed (TRUST_FLUSH_FREQ,
1756 * Initialize peer management subsystem.
1759 GSF_connected_peer_init_ ()
1761 cp_map = GNUNET_CONTAINER_multihashmap_create (128);
1762 GNUNET_assert (GNUNET_OK ==
1763 GNUNET_CONFIGURATION_get_value_filename (GSF_cfg,
1767 GNUNET_DISK_directory_create (trustDirectory);
1768 GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_HIGH,
1769 &cron_flush_trust, NULL);
1774 * Iterator to free peer entries.
1776 * @param cls closure, unused
1777 * @param key current key code
1778 * @param value value in the hash map (peer entry)
1779 * @return GNUNET_YES (we should continue to iterate)
1782 clean_peer (void *cls,
1783 const GNUNET_HashCode * key,
1786 GSF_peer_disconnect_handler_ (NULL,
1787 (const struct GNUNET_PeerIdentity*) key);
1793 * Shutdown peer management subsystem.
1796 GSF_connected_peer_done_ ()
1798 cron_flush_trust (NULL, NULL);
1799 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1802 GNUNET_CONTAINER_multihashmap_destroy (cp_map);
1804 GNUNET_free (trustDirectory);
1805 trustDirectory = NULL;
1810 * Iterator to remove references to LC entry.
1812 * @param cls the 'struct GSF_LocalClient*' to look for
1813 * @param key current key code
1814 * @param value value in the hash map (peer entry)
1815 * @return GNUNET_YES (we should continue to iterate)
1818 clean_local_client (void *cls,
1819 const GNUNET_HashCode * key,
1822 const struct GSF_LocalClient *lc = cls;
1823 struct GSF_ConnectedPeer *cp = value;
1826 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
1827 if (cp->ppd.last_client_replies[i] == lc)
1828 cp->ppd.last_client_replies[i] = NULL;
1834 * Notification that a local client disconnected. Clean up all of our
1835 * references to the given handle.
1837 * @param lc handle to the local client (henceforth invalid)
1840 GSF_handle_local_client_disconnect_ (const struct GSF_LocalClient *lc)
1843 return; /* already cleaned up */
1844 GNUNET_CONTAINER_multihashmap_iterate (cp_map,
1845 &clean_local_client,
1850 /* end of gnunet-service-fs_cp.c */