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3 Copyright (C) 2010-2015 Christian Grothoff (and other contributing authors)
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22 * @file transport/gnunet-service-transport_validation.c
23 * @brief address validation subsystem
24 * @author Christian Grothoff
27 #include "gnunet-service-transport_ats.h"
28 #include "gnunet-service-transport_blacklist.h"
29 #include "gnunet-service-transport_clients.h"
30 #include "gnunet-service-transport_hello.h"
31 #include "gnunet-service-transport_neighbours.h"
32 #include "gnunet-service-transport_plugins.h"
33 #include "gnunet-service-transport_validation.h"
34 #include "gnunet-service-transport.h"
35 #include "gnunet_hello_lib.h"
36 #include "gnunet_ats_service.h"
37 #include "gnunet_peerinfo_service.h"
38 #include "gnunet_signatures.h"
42 * How long is a PONG signature valid? We'll recycle a signature until
43 * 1/4 of this time is remaining. PONGs should expire so that if our
44 * external addresses change an adversary cannot replay them indefinitely.
45 * OTOH, we don't want to spend too much time generating PONG signatures,
46 * so they must have some lifetime to reduce our CPU usage.
48 #define PONG_SIGNATURE_LIFETIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
51 * After how long do we expire an address in a HELLO that we just
52 * validated? This value is also used for our own addresses when we
55 #define HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
58 * How often do we allow PINGing an address that we have not yet
59 * validated? This also determines how long we track an address that
60 * we cannot validate (because after this time we can destroy the
63 #define UNVALIDATED_PING_KEEPALIVE GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
66 * How often do we PING an address that we have successfully validated
67 * in the past but are not actively using? Should be (significantly)
68 * smaller than HELLO_ADDRESS_EXPIRATION.
70 #define VALIDATED_PING_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
73 * How often do we PING an address that we are currently using?
75 #define CONNECTED_PING_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 2)
78 * How much delay is acceptable for sending the PING or PONG?
80 #define ACCEPTABLE_PING_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
83 * Size of the validation map hashmap.
85 #define VALIDATION_MAP_SIZE 256
88 * Priority to use for PINGs
90 #define PING_PRIORITY 2
93 * Priority to use for PONGs
95 #define PONG_PRIORITY 4
98 GNUNET_NETWORK_STRUCT_BEGIN
101 * Message used to ask a peer to validate receipt (to check an address
102 * from a HELLO). Followed by the address we are trying to validate,
103 * or an empty address if we are just sending a PING to confirm that a
104 * connection which the receiver (of the PING) initiated is still valid.
106 struct TransportPingMessage
110 * Type will be #GNUNET_MESSAGE_TYPE_TRANSPORT_PING
112 struct GNUNET_MessageHeader header;
115 * Challenge code (to ensure fresh reply).
117 uint32_t challenge GNUNET_PACKED;
120 * Who is the intended recipient?
122 struct GNUNET_PeerIdentity target;
128 * Message used to validate a HELLO. The challenge is included in the
129 * confirmation to make matching of replies to requests possible. The
130 * signature signs our public key, an expiration time and our address.<p>
132 * This message is followed by our transport address that the PING tried
133 * to confirm (if we liked it). The address can be empty (zero bytes)
134 * if the PING had not address either (and we received the request via
135 * a connection that we initiated).
137 struct TransportPongMessage
141 * Type will be #GNUNET_MESSAGE_TYPE_TRANSPORT_PONG
143 struct GNUNET_MessageHeader header;
146 * Challenge code from PING (showing freshness). Not part of what
147 * is signed so that we can re-use signatures.
149 uint32_t challenge GNUNET_PACKED;
154 struct GNUNET_CRYPTO_EddsaSignature signature;
157 * #GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
158 * plausible address for the signing peer.
160 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
163 * When does this signature expire?
165 struct GNUNET_TIME_AbsoluteNBO expiration;
168 * Size of address appended to this message (part of what is
169 * being signed, hence not redundant).
171 uint32_t addrlen GNUNET_PACKED;
174 GNUNET_NETWORK_STRUCT_END
177 * Information about an address under validation
179 struct ValidationEntry
185 struct GNUNET_HELLO_Address *address;
188 * Handle to the blacklist check (if we're currently in it).
190 struct GST_BlacklistCheck *bc;
193 * Cached PONG signature
195 struct GNUNET_CRYPTO_EddsaSignature pong_sig_cache;
198 * ID of task that will clean up this entry if nothing happens.
200 struct GNUNET_SCHEDULER_Task *timeout_task;
203 * ID of task that will trigger address revalidation.
205 struct GNUNET_SCHEDULER_Task *revalidation_task;
208 * At what time did we send the latest validation request (PING)?
210 struct GNUNET_TIME_Absolute send_time;
213 * At what time do we send the next validation request (PING)?
215 struct GNUNET_TIME_Absolute next_validation;
218 * Until when is this address valid?
219 * ZERO if it is not currently considered valid.
221 struct GNUNET_TIME_Absolute valid_until;
224 * Until when is the cached PONG signature valid?
225 * ZERO if it is not currently considered valid.
227 struct GNUNET_TIME_Absolute pong_sig_valid_until;
230 * How long until we can try to validate this address again?
231 * FOREVER if the address is for an unsupported plugin (from PEERINFO)
232 * ZERO if the address is considered valid (no validation needed)
233 * otherwise a time in the future if we're currently denying re-validation
235 struct GNUNET_TIME_Absolute revalidation_block;
238 * Last observed latency for this address (round-trip), delay between
239 * last PING sent and PONG received; FOREVER if we never got a PONG.
241 struct GNUNET_TIME_Relative latency;
244 * Current state of this validation entry
246 enum GNUNET_TRANSPORT_ValidationState state;
249 * Challenge number we used.
254 * When passing the address in #add_valid_peer_address(), did we
255 * copy the address to the HELLO yet?
260 * Are we currently using this address for a connection?
265 * Are we expecting a PONG message for this validation entry?
270 * Is this address known to ATS as valid right now?
275 * Which network type does our address belong to?
277 enum GNUNET_ATS_Network_Type network;
282 * Map of PeerIdentities to 'struct ValidationEntry*'s (addresses
283 * of the given peer that we are currently validating, have validated
284 * or are blocked from re-validation for a while).
286 static struct GNUNET_CONTAINER_MultiPeerMap *validation_map;
289 * Context for peerinfo iteration.
291 static struct GNUNET_PEERINFO_NotifyContext *pnc;
294 * Minimum delay between to validations
296 static struct GNUNET_TIME_Relative validation_delay;
299 * Number of validations running; any PING that was not yet
300 * matched by a PONG and for which we have not yet hit the
301 * timeout is considered a running 'validation'.
303 static unsigned int validations_running;
306 * Validition fast start threshold
308 static unsigned int validations_fast_start_threshold;
311 * When is next validation allowed
313 static struct GNUNET_TIME_Absolute validation_next;
317 * Context for the validation entry match function.
319 struct ValidationEntryMatchContext
322 * Where to store the result?
324 struct ValidationEntry *ve;
327 * Address we're interested in.
329 const struct GNUNET_HELLO_Address *address;
335 * Provide an update on the `validation_map` map size to statistics.
336 * This function should be called whenever the `validation_map`
340 publish_ve_stat_update ()
342 GNUNET_STATISTICS_set (GST_stats,
343 gettext_noop ("# Addresses in validation map"),
344 GNUNET_CONTAINER_multipeermap_size (validation_map),
350 * Iterate over validation entries until a matching one is found.
352 * @param cls the `struct ValidationEntryMatchContext *`
353 * @param key peer identity (unused)
354 * @param value a `struct ValidationEntry *` to match
355 * @return #GNUNET_YES if the entry does not match,
356 * #GNUNET_NO if the entry does match
359 validation_entry_match (void *cls,
360 const struct GNUNET_PeerIdentity *key,
363 struct ValidationEntryMatchContext *vemc = cls;
364 struct ValidationEntry *ve = value;
366 if (0 == GNUNET_HELLO_address_cmp (ve->address,
377 * A validation entry changed. Update the state and notify
380 * @param ve validation entry that changed
381 * @param state new state
384 validation_entry_changed (struct ValidationEntry *ve,
385 enum GNUNET_TRANSPORT_ValidationState state)
388 GST_clients_broadcast_validation_notification (&ve->address->peer,
398 * Iterate over validation entries and free them.
400 * @param cls (unused)
401 * @param key peer identity (unused)
402 * @param value a `struct ValidationEntry *` to clean up
403 * @return #GNUNET_YES (continue to iterate)
406 cleanup_validation_entry (void *cls,
407 const struct GNUNET_PeerIdentity *key,
410 struct ValidationEntry *ve = value;
412 ve->next_validation = GNUNET_TIME_UNIT_ZERO_ABS;
413 ve->valid_until = GNUNET_TIME_UNIT_ZERO_ABS;
415 /* Notify about deleted entry */
416 validation_entry_changed (ve,
417 GNUNET_TRANSPORT_VS_REMOVE);
421 GST_blacklist_test_cancel (ve->bc);
424 GNUNET_break (GNUNET_OK ==
425 GNUNET_CONTAINER_multipeermap_remove (validation_map,
428 publish_ve_stat_update ();
429 if (GNUNET_YES == ve->known_to_ats)
431 GST_ats_expire_address (ve->address);
432 ve->known_to_ats = GNUNET_NO;
434 GNUNET_HELLO_address_free (ve->address);
435 if (NULL != ve->timeout_task)
437 GNUNET_SCHEDULER_cancel (ve->timeout_task);
438 ve->timeout_task = NULL;
440 if (NULL != ve->revalidation_task)
442 GNUNET_SCHEDULER_cancel (ve->revalidation_task);
443 ve->revalidation_task = NULL;
445 if ( (GNUNET_YES == ve->expecting_pong) &&
446 (validations_running > 0) )
448 validations_running--;
449 GNUNET_STATISTICS_set (GST_stats,
450 gettext_noop ("# validations running"),
460 * Address validation cleanup task. Assesses if the record is no
461 * longer valid and then possibly triggers its removal.
463 * @param cls the `struct ValidationEntry`
464 * @param tc scheduler context (unused)
467 timeout_hello_validation (void *cls,
468 const struct GNUNET_SCHEDULER_TaskContext *tc)
470 struct ValidationEntry *ve = cls;
471 struct GNUNET_TIME_Absolute max;
472 struct GNUNET_TIME_Relative left;
474 ve->timeout_task = NULL;
475 /* For valid addresses, we want to wait until the expire;
476 for addresses under PING validation, we want to wait
477 until we give up on the PING */
478 max = GNUNET_TIME_absolute_max (ve->valid_until,
479 ve->revalidation_block);
480 left = GNUNET_TIME_absolute_get_remaining (ve->max);
481 if (left.rel_value_us > 0)
483 /* We should wait a bit longer. This happens when
484 address lifetimes are extended due to successful
487 GNUNET_SCHEDULER_add_delayed (left,
488 &timeout_hello_validation,
492 GNUNET_STATISTICS_update (GST_stats,
493 gettext_noop ("# address records discarded (timeout)"),
496 cleanup_validation_entry (NULL,
503 * Function called with the result from blacklisting.
504 * Send a PING to the other peer if a communication is allowed.
506 * @param cls our `struct ValidationEntry`
507 * @param pid identity of the other peer
508 * @param result #GNUNET_OK if the connection is allowed, #GNUNET_NO if not
511 transmit_ping_if_allowed (void *cls,
512 const struct GNUNET_PeerIdentity *pid,
515 struct ValidationEntry *ve = cls;
516 struct TransportPingMessage ping;
517 struct GNUNET_TRANSPORT_PluginFunctions *papi;
518 struct GNUNET_TIME_Absolute next;
519 const struct GNUNET_MessageHeader *hello;
520 enum GNUNET_ATS_Network_Type network;
527 if (GNUNET_NO == result)
529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
530 "Blacklist denies sending PING to `%s' `%s' `%s'\n",
532 GST_plugins_a2s (ve->address),
533 ve->address->transport_name);
534 GNUNET_STATISTICS_update (GST_stats,
535 gettext_noop ("# address records discarded (blacklist)"),
538 cleanup_validation_entry (NULL,
543 hello = GST_hello_get ();
546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
547 "Not PINGing peer `%s' as our HELLO is not yet ready\n",
551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
552 "Transmitting plain PING to `%s' `%s' `%s'\n",
554 GST_plugins_a2s (ve->address),
555 ve->address->transport_name);
557 slen = strlen (ve->address->transport_name) + 1;
558 hsize = ntohs (hello->size);
560 sizeof (struct TransportPingMessage) + ve->address->address_length +
564 htons (sizeof (struct TransportPingMessage) +
565 ve->address->address_length + slen);
566 ping.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
567 ping.challenge = htonl (ve->challenge);
570 if (tsize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
575 sizeof (struct TransportPingMessage) + ve->address->address_length +
579 char message_buf[tsize];
581 /* build message with structure:
582 * [HELLO][TransportPingMessage][Transport name][Address] */
583 memcpy (message_buf, hello, hsize);
584 memcpy (&message_buf[hsize],
586 sizeof (struct TransportPingMessage));
587 memcpy (&message_buf[sizeof (struct TransportPingMessage) + hsize],
588 ve->address->transport_name,
590 memcpy (&message_buf[sizeof (struct TransportPingMessage) + slen + hsize],
591 ve->address->address,
592 ve->address->address_length);
593 papi = GST_plugins_find (ve->address->transport_name);
594 GNUNET_assert (NULL != papi);
595 GNUNET_assert (NULL != papi->send);
596 struct Session *session = papi->get_session (papi->cls,
601 ret = papi->send (papi->cls, session,
604 ACCEPTABLE_PING_DELAY,
606 network = papi->get_network (papi->cls, session);
607 if (GNUNET_ATS_NET_UNSPECIFIED == network)
609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
610 "Could not obtain a valid network for `%s' `%s'\n",
612 GST_plugins_a2s (ve->address));
615 GST_neighbours_notify_data_sent (ve->address, session, tsize);
619 /* Could not get a valid session */
620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
621 "Could not get a valid session for `%s' `%s'\n",
623 GST_plugins_a2s (ve->address));
629 next = GNUNET_TIME_relative_to_absolute (validation_delay);
630 validation_next = GNUNET_TIME_absolute_max (next,
632 ve->send_time = GNUNET_TIME_absolute_get ();
633 GNUNET_STATISTICS_update (GST_stats,
634 gettext_noop ("# PINGs for address validation sent"),
637 ve->network = network;
638 ve->expecting_pong = GNUNET_YES;
639 validations_running++;
640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
641 "Validation started, %u validation processes running\n",
642 validations_running);
643 GNUNET_STATISTICS_set (GST_stats,
644 gettext_noop ("# validations running"),
647 /* Notify about PING sent */
648 validation_entry_changed (ve, GNUNET_TRANSPORT_VS_UPDATE);
654 * Do address validation again to keep address valid.
656 * @param cls the `struct ValidationEntry`
657 * @param tc scheduler context (unused)
660 revalidate_address (void *cls,
661 const struct GNUNET_SCHEDULER_TaskContext *tc)
663 struct ValidationEntry *ve = cls;
664 struct GNUNET_TIME_Relative canonical_delay;
665 struct GNUNET_TIME_Relative delay;
666 struct GNUNET_TIME_Relative blocked_for;
667 struct GST_BlacklistCheck *bc;
670 ve->revalidation_task = NULL;
671 delay = GNUNET_TIME_absolute_get_remaining (ve->revalidation_block);
672 /* Considering current connectivity situation, what is the maximum
673 block period permitted? */
674 if (GNUNET_YES == ve->in_use)
675 canonical_delay = CONNECTED_PING_FREQUENCY;
676 else if (GNUNET_TIME_absolute_get_remaining (ve->valid_until).rel_value_us > 0)
677 canonical_delay = VALIDATED_PING_FREQUENCY;
679 canonical_delay = UNVALIDATED_PING_KEEPALIVE;
680 /* Use delay that is MIN of original delay and possibly adjusted
681 new maximum delay (which may be lower); the real delay
682 is originally randomized between "canonical_delay" and "2 * canonical_delay",
683 so continue to permit that window for the operation. */
684 delay = GNUNET_TIME_relative_min (delay,
685 GNUNET_TIME_relative_multiply (canonical_delay,
687 ve->revalidation_block = GNUNET_TIME_relative_to_absolute (delay);
688 if (delay.rel_value_us > 0)
690 /* should wait a bit longer */
691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
692 "Waiting for %s longer before validating address `%s'\n",
693 GNUNET_STRINGS_relative_time_to_string (delay,
695 GST_plugins_a2s (ve->address));
696 ve->revalidation_task =
697 GNUNET_SCHEDULER_add_delayed (delay,
698 &revalidate_address, ve);
699 ve->next_validation = GNUNET_TIME_relative_to_absolute (delay);
702 /* check if globally we have too many active validations at a
703 too high rate, if so, delay ours */
704 blocked_for = GNUNET_TIME_absolute_get_remaining (validation_next);
705 if ( (validations_running > validations_fast_start_threshold) &&
706 (blocked_for.rel_value_us > 0) )
708 /* Validations are blocked, have to wait for blocked_for time */
709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
710 "Validations blocked for another %s, delaying validating address `%s'\n",
711 GNUNET_STRINGS_relative_time_to_string (blocked_for,
713 GST_plugins_a2s (ve->address));
714 GNUNET_STATISTICS_update (GST_stats,
715 gettext_noop ("# validations delayed by global throttle"),
718 ve->revalidation_task =
719 GNUNET_SCHEDULER_add_delayed (blocked_for,
722 ve->next_validation = GNUNET_TIME_relative_to_absolute (blocked_for);
726 /* We are good to go; remember to not go again for `canonical_delay` time;
727 add up to `canonical_delay` to randomize start time */
728 ve->revalidation_block = GNUNET_TIME_relative_to_absolute (canonical_delay);
729 /* schedule next PINGing with some extra random delay to avoid synchronous re-validations */
731 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
732 canonical_delay.rel_value_us);
734 delay = GNUNET_TIME_relative_add (canonical_delay,
735 GNUNET_TIME_relative_multiply
736 (GNUNET_TIME_UNIT_MICROSECONDS, rdelay));
738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
739 "Validating now, next scheduled for %s, now validating address `%s'\n",
740 GNUNET_STRINGS_relative_time_to_string (blocked_for,
742 GST_plugins_a2s (ve->address));
743 ve->revalidation_task =
744 GNUNET_SCHEDULER_add_delayed (delay, &revalidate_address, ve);
745 ve->next_validation = GNUNET_TIME_relative_to_absolute (delay);
747 /* start PINGing by checking blacklist */
748 GNUNET_STATISTICS_update (GST_stats,
749 gettext_noop ("# address revalidations started"), 1,
751 bc = GST_blacklist_test_allowed (&ve->address->peer,
752 ve->address->transport_name,
753 &transmit_ping_if_allowed, ve);
755 ve->bc = bc; /* only set 'bc' if 'transmit_ping_if_allowed' was not already
761 * Find a ValidationEntry entry for the given neighbour that matches
762 * the given address and transport. If none exists, create one (but
763 * without starting any validation).
765 * @param address address to find
766 * @return validation entry matching the given specifications, NULL
767 * if we don't have an existing entry and no public key was given
769 static struct ValidationEntry *
770 find_validation_entry (const struct GNUNET_HELLO_Address *address)
772 struct ValidationEntryMatchContext vemc;
773 struct ValidationEntry *ve;
776 vemc.address = address;
777 GNUNET_CONTAINER_multipeermap_get_multiple (validation_map,
779 &validation_entry_match, &vemc);
780 if (NULL != (ve = vemc.ve))
782 ve = GNUNET_new (struct ValidationEntry);
783 ve->in_use = GNUNET_SYSERR; /* not defined */
784 ve->address = GNUNET_HELLO_address_copy (address);
785 ve->pong_sig_valid_until = GNUNET_TIME_UNIT_ZERO_ABS;
786 memset (&ve->pong_sig_cache, '\0', sizeof (struct GNUNET_CRYPTO_EddsaSignature));
787 ve->latency = GNUNET_TIME_UNIT_FOREVER_REL;
789 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
791 GNUNET_SCHEDULER_add_delayed (UNVALIDATED_PING_KEEPALIVE,
792 &timeout_hello_validation,
794 GNUNET_CONTAINER_multipeermap_put (validation_map,
797 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
798 publish_ve_stat_update ();
799 validation_entry_changed (ve, GNUNET_TRANSPORT_VS_NEW);
805 * Iterator which adds the given address to the set of validated
808 * @param cls original HELLO message
809 * @param address the address
810 * @param expiration expiration time
811 * @return #GNUNET_OK (keep the address), could return
812 * #GNUNET_NO (delete address, but this is ignored);
813 * #GNUNET_SYSERR would abort iteration (but we always iterate all)
816 add_valid_address (void *cls,
817 const struct GNUNET_HELLO_Address *address,
818 struct GNUNET_TIME_Absolute expiration)
820 const struct GNUNET_HELLO_Message *hello = cls;
821 struct ValidationEntry *ve;
822 struct GNUNET_PeerIdentity pid;
823 struct GNUNET_ATS_Properties prop;
825 if (0 == GNUNET_TIME_absolute_get_remaining (expiration).rel_value_us)
826 return GNUNET_OK; /* expired */
827 if (GNUNET_OK != GNUNET_HELLO_get_id (hello, &pid))
830 return GNUNET_OK; /* invalid HELLO !? */
832 if (NULL == GST_plugins_find (address->transport_name))
834 /* might have been valid in the past, but we don't have that
835 plugin loaded right now */
839 ve = find_validation_entry (address);
840 ve->valid_until = GNUNET_TIME_absolute_max (ve->valid_until,
842 if (NULL == ve->revalidation_task)
844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
845 "Starting revalidations for valid address `%s'\n",
846 GST_plugins_a2s (ve->address));
847 ve->next_validation = GNUNET_TIME_absolute_get();
848 ve->revalidation_task = GNUNET_SCHEDULER_add_now (&revalidate_address, ve);
850 validation_entry_changed (ve, GNUNET_TRANSPORT_VS_UPDATE);
851 memset (&prop, 0, sizeof (prop));
852 prop.scope = ve->network;
853 prop.delay = GNUNET_TIME_relative_divide (ve->latency, 2);
854 if (GNUNET_YES != ve->known_to_ats)
856 ve->known_to_ats = GNUNET_YES;
857 GST_ats_add_address (address, &prop);
864 * Function called for any HELLO known to PEERINFO.
866 * @param cls unused (NULL)
867 * @param peer id of the peer, NULL for last call (during iteration,
868 * as we are monitoring, this should never happen)
869 * @param hello hello message for the peer (can be NULL)
870 * @param err_msg error message
873 process_peerinfo_hello (void *cls,
874 const struct GNUNET_PeerIdentity *peer,
875 const struct GNUNET_HELLO_Message *hello,
878 GNUNET_assert (NULL != peer);
881 if (0 == memcmp (&GST_my_identity,
883 sizeof (struct GNUNET_PeerIdentity)))
885 /* Peerinfo returned own identity, skip validation */
888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
889 "Handling HELLO for peer `%s'\n",
891 GNUNET_assert (NULL ==
892 GNUNET_HELLO_iterate_addresses (hello, GNUNET_NO,
899 * Start the validation subsystem.
901 * @param max_fds maximum number of fds to use
904 GST_validation_start (unsigned int max_fds)
907 * Initialization for validation throttling
909 * We have a maximum number max_fds of connections we can use for validation
910 * We monitor the number of validations in parallel and start to throttle it
911 * when doing to many validations in parallel:
912 * if (running validations < (max_fds / 2))
913 * - "fast start": run validation immediately
914 * - have delay of (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value_us) / (max_fds / 2)
915 * (300 sec / ~150 == ~2 sec.) between two validations
918 validation_next = GNUNET_TIME_absolute_get();
919 validation_delay.rel_value_us = (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value_us) / (max_fds / 2);
920 validations_fast_start_threshold = (max_fds / 2);
921 validations_running = 0;
922 GNUNET_STATISTICS_set (GST_stats,
923 gettext_noop ("# validations running"),
926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
927 "Validation uses a fast start threshold of %u connections and a delay of %s\n",
928 validations_fast_start_threshold,
929 GNUNET_STRINGS_relative_time_to_string (validation_delay,
931 validation_map = GNUNET_CONTAINER_multipeermap_create (VALIDATION_MAP_SIZE,
933 pnc = GNUNET_PEERINFO_notify (GST_cfg, GNUNET_YES,
934 &process_peerinfo_hello, NULL);
939 * Stop the validation subsystem.
942 GST_validation_stop ()
944 GNUNET_CONTAINER_multipeermap_iterate (validation_map,
945 &cleanup_validation_entry,
947 GNUNET_CONTAINER_multipeermap_destroy (validation_map);
948 validation_map = NULL;
949 GNUNET_PEERINFO_notify_cancel (pnc);
954 * Send the given PONG to the given address.
956 * @param cls the PONG message
957 * @param valid_until is ZERO if we never validated the address,
958 * otherwise a time up to when we consider it (or was) valid
959 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
960 * is ZERO if the address is considered valid (no validation needed)
961 * otherwise a time in the future if we're currently denying re-validation
962 * @param address target address
965 multicast_pong (void *cls,
966 struct GNUNET_TIME_Absolute valid_until,
967 struct GNUNET_TIME_Absolute validation_block,
968 const struct GNUNET_HELLO_Address *address)
970 struct TransportPongMessage *pong = cls;
971 struct GNUNET_TRANSPORT_PluginFunctions *papi;
972 struct Session *session;
974 papi = GST_plugins_find (address->transport_name);
977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
978 "Plugin %s not supported, cannot send PONG\n",
979 address->transport_name);
982 GNUNET_assert (NULL != papi->send);
983 GNUNET_assert (NULL != papi->get_session);
984 session = papi->get_session(papi->cls, address);
990 GST_ats_new_session (address, session);
991 papi->send (papi->cls, session,
993 ntohs (pong->header.size),
995 ACCEPTABLE_PING_DELAY,
997 GST_neighbours_notify_data_sent (address,
1004 * We've received a PING. If appropriate, generate a PONG.
1006 * @param sender peer sending the PING
1007 * @param hdr the PING
1008 * @param sender_address the sender address as we got it
1009 * @param session session we got the PING from
1010 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
1013 GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
1014 const struct GNUNET_MessageHeader *hdr,
1015 const struct GNUNET_HELLO_Address *sender_address,
1016 struct Session *session)
1018 const struct TransportPingMessage *ping;
1019 struct TransportPongMessage *pong;
1020 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1021 struct GNUNET_CRYPTO_EddsaSignature *sig_cache;
1022 struct GNUNET_TIME_Absolute *sig_cache_exp;
1024 const char *addrend;
1030 struct GNUNET_HELLO_Address address;
1032 if (ntohs (hdr->size) < sizeof (struct TransportPingMessage))
1034 GNUNET_break_op (0);
1035 return GNUNET_SYSERR;
1037 ping = (const struct TransportPingMessage *) hdr;
1039 memcmp (&ping->target, &GST_my_identity,
1040 sizeof (struct GNUNET_PeerIdentity)))
1042 GNUNET_STATISTICS_update (GST_stats,
1044 ("# PING message for different peer received"), 1,
1046 return GNUNET_SYSERR;
1048 GNUNET_STATISTICS_update (GST_stats,
1049 gettext_noop ("# PING messages received"), 1,
1051 addr = (const char *) &ping[1];
1052 len_address = ntohs (hdr->size) - sizeof (struct TransportPingMessage);
1053 /* peer wants to confirm that this is one of our addresses, this is what is
1054 * used for address validation */
1057 sig_cache_exp = NULL;
1059 if (len_address > 0)
1061 addrend = memchr (addr, '\0', len_address);
1062 if (NULL == addrend)
1064 GNUNET_break_op (0);
1065 return GNUNET_SYSERR;
1068 len_plugin = strlen (addr) + 1;
1069 len_address -= len_plugin;
1070 address.local_info = GNUNET_HELLO_ADDRESS_INFO_NONE;
1071 address.address = addrend;
1072 address.address_length = len_address;
1073 address.transport_name = addr;
1074 address.peer = GST_my_identity;
1076 if (NULL == address.transport_name)
1081 if (0 != strstr (address.transport_name, "_client"))
1083 plugin_name = GNUNET_strdup (address.transport_name);
1084 pos = strstr (plugin_name, "_client");
1085 GNUNET_assert (NULL != pos);
1086 GNUNET_snprintf (pos, strlen ("_server") + 1, "%s", "_server");
1089 plugin_name = GNUNET_strdup (address.transport_name);
1091 if (NULL == (papi = GST_plugins_find (plugin_name)))
1093 /* we don't have the plugin for this address */
1094 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1095 _("Plugin `%s' not available, cannot confirm having this address\n"),
1097 GNUNET_free (plugin_name);
1098 return GNUNET_SYSERR;
1100 GNUNET_free (plugin_name);
1102 papi->check_address (papi->cls,
1106 GNUNET_STATISTICS_update (GST_stats,
1108 ("# failed address checks during validation"), 1,
1110 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1111 _("Address `%s' is not one of my addresses, not confirming PING\n"),
1112 GST_plugins_a2s (&address));
1113 return GNUNET_SYSERR;
1117 GNUNET_STATISTICS_update (GST_stats,
1119 ("# successful address checks during validation"), 1,
1121 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1122 "Address `%s' is one of my addresses, confirming PING\n",
1123 GST_plugins_a2s (&address));
1127 GST_hello_test_address (&address,
1131 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1132 _("Not confirming PING from peer `%s' with address `%s' since I cannot confirm having this address.\n"),
1133 GNUNET_i2s (sender),
1134 GST_plugins_a2s (&address));
1135 return GNUNET_SYSERR;
1140 addrend = NULL; /* make gcc happy */
1142 static struct GNUNET_CRYPTO_EddsaSignature no_address_signature;
1143 static struct GNUNET_TIME_Absolute no_address_signature_expiration;
1145 sig_cache = &no_address_signature;
1146 sig_cache_exp = &no_address_signature_expiration;
1149 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1150 "I am `%s', sending PONG to peer `%s'\n",
1151 GNUNET_i2s_full (&GST_my_identity),
1152 GNUNET_i2s (sender));
1154 /* message with structure:
1155 * [TransportPongMessage][Transport name][Address] */
1157 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + len_address + len_plugin);
1159 htons (sizeof (struct TransportPongMessage) + len_address + len_plugin);
1160 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
1161 pong->purpose.size =
1162 htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
1163 sizeof (uint32_t) + sizeof (struct GNUNET_TIME_AbsoluteNBO) +
1164 len_address + len_plugin);
1165 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
1166 memcpy (&pong->challenge, &ping->challenge, sizeof (ping->challenge));
1167 pong->addrlen = htonl (len_address + len_plugin);
1168 memcpy (&pong[1], addr, len_plugin); /* Copy transport plugin */
1169 if (len_address > 0)
1171 GNUNET_assert (NULL != addrend);
1172 memcpy (&((char *) &pong[1])[len_plugin], addrend, len_address);
1174 if (GNUNET_TIME_absolute_get_remaining (*sig_cache_exp).rel_value_us <
1175 PONG_SIGNATURE_LIFETIME.rel_value_us / 4)
1177 /* create / update cached sig */
1178 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1179 "Creating PONG signature to indicate ownership.\n");
1180 *sig_cache_exp = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
1181 pong->expiration = GNUNET_TIME_absolute_hton (*sig_cache_exp);
1183 GNUNET_CRYPTO_eddsa_sign (GST_my_private_key, &pong->purpose,
1186 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1187 _("Failed to create PONG signature for peer `%s'\n"), GNUNET_i2s (sender));
1192 pong->expiration = GNUNET_TIME_absolute_hton (*sig_cache_exp);
1194 pong->signature = *sig_cache;
1196 GNUNET_assert (NULL != sender_address);
1198 /* first see if the session we got this PING from can be used to transmit
1199 * a response reliably */
1206 GNUNET_assert (NULL != papi->send);
1207 GNUNET_assert (NULL != papi->get_session);
1208 if (NULL == session)
1210 session = papi->get_session (papi->cls, sender_address);
1212 if (NULL == session)
1219 ret = papi->send (papi->cls, session,
1220 (const char *) pong,
1221 ntohs (pong->header.size),
1222 PONG_PRIORITY, ACCEPTABLE_PING_DELAY,
1225 GST_neighbours_notify_data_sent (sender_address,
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1233 "Transmitted PONG to `%s' via reliable mechanism\n",
1234 GNUNET_i2s (sender));
1236 GNUNET_STATISTICS_update (GST_stats,
1238 ("# PONGs unicast via reliable transport"), 1,
1244 /* no reliable method found, try transmission via all known addresses */
1245 GNUNET_STATISTICS_update (GST_stats,
1247 ("# PONGs multicast to all available addresses"), 1,
1249 GST_validation_get_addresses (sender,
1250 &multicast_pong, pong);
1257 * Validate an individual address.
1259 * @param address address we should try to validate
1262 GST_validation_handle_address (const struct GNUNET_HELLO_Address *address)
1264 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1265 struct ValidationEntry *ve;
1267 papi = GST_plugins_find (address->transport_name);
1270 /* This plugin is currently unvailable ... ignore */
1273 ve = find_validation_entry (address);
1274 if (NULL == ve->revalidation_task)
1276 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1277 "Validation process started for fresh address `%s' of %s\n",
1278 GST_plugins_a2s (ve->address),
1279 GNUNET_i2s (&ve->address->peer));
1280 ve->revalidation_task = GNUNET_SCHEDULER_add_now (&revalidate_address, ve);
1286 * Iterator callback to go over all addresses and try to validate them
1287 * (unless blocked or already validated).
1290 * @param address the address
1291 * @param expiration expiration time
1292 * @return #GNUNET_OK (keep the address)
1295 validate_address_iterator (void *cls,
1296 const struct GNUNET_HELLO_Address *address,
1297 struct GNUNET_TIME_Absolute expiration)
1299 if (0 == GNUNET_TIME_absolute_get_remaining (expiration).rel_value_us)
1301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1302 "Skipping expired address from HELLO\n");
1303 return GNUNET_OK; /* expired */
1305 GST_validation_handle_address (address);
1311 * Add the validated peer address to the HELLO.
1313 * @param cls the `struct ValidationEntry *` with the validated address
1314 * @param max space in @a buf
1315 * @param buf where to add the address
1316 * @return number of bytes written, #GNUNET_SYSERR to signal the
1317 * end of the iteration.
1320 add_valid_peer_address (void *cls,
1324 struct ValidationEntry *ve = cls;
1326 if (GNUNET_YES == ve->copied)
1327 return GNUNET_SYSERR; /* Done */
1328 ve->copied = GNUNET_YES;
1329 return GNUNET_HELLO_add_address (ve->address,
1337 * We've received a PONG. Check if it matches a pending PING and
1338 * mark the respective address as confirmed.
1340 * @param sender peer sending the PONG
1341 * @param hdr the PONG
1342 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
1345 GST_validation_handle_pong (const struct GNUNET_PeerIdentity *sender,
1346 const struct GNUNET_MessageHeader *hdr)
1348 const struct TransportPongMessage *pong;
1349 struct ValidationEntry *ve;
1355 struct GNUNET_HELLO_Message *hello;
1356 struct GNUNET_HELLO_Address address;
1360 if (ntohs (hdr->size) < sizeof (struct TransportPongMessage))
1362 GNUNET_break_op (0);
1363 return GNUNET_SYSERR;
1365 GNUNET_STATISTICS_update (GST_stats,
1366 gettext_noop ("# PONG messages received"), 1,
1369 /* message with structure:
1370 * [TransportPongMessage][Transport name][Address] */
1372 pong = (const struct TransportPongMessage *) hdr;
1373 tname = (const char *) &pong[1];
1374 size = ntohs (hdr->size) - sizeof (struct TransportPongMessage);
1375 addr = memchr (tname, '\0', size);
1378 GNUNET_break_op (0);
1379 return GNUNET_SYSERR;
1382 slen = strlen (tname) + 1;
1383 addrlen = size - slen;
1385 if (NULL == GST_plugins_find (tname))
1387 /* we got the PONG, but the transport plugin specified in it
1388 is not supported by this peer, so this cannot be a good
1390 GNUNET_break_op (0);
1394 address.peer = *sender;
1395 address.address = addr;
1396 address.address_length = addrlen;
1397 address.transport_name = tname;
1398 address.local_info = GNUNET_HELLO_ADDRESS_INFO_NONE;
1399 ve = find_validation_entry (&address);
1400 if ((NULL == ve) || (GNUNET_NO == ve->expecting_pong))
1402 GNUNET_STATISTICS_update (GST_stats,
1404 ("# PONGs dropped, no matching pending validation"),
1408 /* now check that PONG is well-formed */
1409 if (0 != memcmp (&ve->address->peer,
1411 sizeof (struct GNUNET_PeerIdentity)))
1413 GNUNET_break_op (0);
1414 return GNUNET_SYSERR;
1417 GNUNET_TIME_absolute_get_remaining
1418 (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value_us)
1420 GNUNET_STATISTICS_update (GST_stats,
1422 ("# PONGs dropped, signature expired"), 1,
1424 return GNUNET_SYSERR;
1427 sig_res = GNUNET_SYSERR;
1428 do_verify = GNUNET_YES;
1429 if (0 != GNUNET_TIME_absolute_get_remaining (ve->pong_sig_valid_until).rel_value_us)
1431 /* We have a cached and valid signature for this peer,
1432 * try to compare instead of verify */
1433 if (0 == memcmp (&ve->pong_sig_cache, &pong->signature, sizeof (struct GNUNET_CRYPTO_EddsaSignature)))
1435 /* signatures are identical, we can skip verification */
1436 sig_res = GNUNET_OK;
1437 do_verify = GNUNET_NO;
1441 sig_res = GNUNET_SYSERR;
1442 /* signatures do not match, we have to verify */
1446 if (GNUNET_YES == do_verify)
1448 /* Do expensive verification */
1449 sig_res = GNUNET_CRYPTO_eddsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
1450 &pong->purpose, &pong->signature,
1451 &ve->address->peer.public_key);
1452 if (sig_res == GNUNET_SYSERR)
1454 GNUNET_break_op (0);
1455 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1456 "Failed to verify: invalid signature on address `%s':%s from peer `%s'\n",
1458 GST_plugins_a2s (ve->address),
1459 GNUNET_i2s (sender));
1462 if (sig_res == GNUNET_SYSERR)
1464 GNUNET_break_op (0);
1465 return GNUNET_SYSERR;
1468 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1469 "Validation process successful for peer `%s' with plugin `%s' address `%s'\n",
1470 GNUNET_i2s (sender),
1472 GST_plugins_a2s (ve->address));
1473 GNUNET_STATISTICS_update (GST_stats,
1474 gettext_noop ("# validations succeeded"),
1477 /* validity achieved, remember it! */
1478 ve->expecting_pong = GNUNET_NO;
1479 ve->valid_until = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
1480 ve->pong_sig_cache = pong->signature;
1481 ve->pong_sig_valid_until = GNUNET_TIME_absolute_ntoh (pong->expiration);
1482 ve->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
1484 if (GNUNET_YES == ve->known_to_ats)
1486 GST_ats_update_delay (ve->address,
1487 GNUNET_TIME_relative_divide (ve->latency, 2));
1491 struct GNUNET_ATS_Properties prop;
1493 memset (&prop, 0, sizeof (prop));
1494 prop.scope = ve->network;
1495 prop.delay = GNUNET_TIME_relative_divide (ve->latency, 2);
1496 ve->known_to_ats = GNUNET_YES;
1497 GST_ats_add_address (ve->address, &prop);
1500 if (validations_running > 0)
1502 validations_running--;
1503 GNUNET_STATISTICS_set (GST_stats,
1504 gettext_noop ("# validations running"),
1505 validations_running,
1507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1508 "Validation finished, %u validation processes running\n",
1509 validations_running);
1516 /* Notify about new validity */
1517 validation_entry_changed (ve, GNUNET_TRANSPORT_VS_UPDATE);
1519 /* build HELLO to store in PEERINFO */
1520 ve->copied = GNUNET_NO;
1521 hello = GNUNET_HELLO_create (&ve->address->peer.public_key,
1522 &add_valid_peer_address, ve,
1524 GNUNET_PEERINFO_add_peer (GST_peerinfo, hello, NULL, NULL);
1525 GNUNET_free (hello);
1531 * We've received a HELLO, check which addresses are new and trigger
1534 * @param hello the HELLO we received
1535 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
1538 GST_validation_handle_hello (const struct GNUNET_MessageHeader *hello)
1540 const struct GNUNET_HELLO_Message *hm =
1541 (const struct GNUNET_HELLO_Message *) hello;
1542 struct GNUNET_PeerIdentity pid;
1543 struct GNUNET_HELLO_Message *h;
1546 friend = GNUNET_HELLO_is_friend_only (hm);
1547 if ( ( (GNUNET_YES != friend) &&
1548 (GNUNET_NO != friend) ) ||
1549 (GNUNET_OK != GNUNET_HELLO_get_id (hm, &pid)) )
1551 /* malformed HELLO */
1552 GNUNET_break_op (0);
1553 return GNUNET_SYSERR;
1556 memcmp (&GST_my_identity,
1558 sizeof (struct GNUNET_PeerIdentity)))
1560 /* got our own HELLO, how boring */
1564 GNUNET_CONTAINER_multipeermap_contains (validation_map,
1567 /* Add peer identity without addresses to peerinfo service */
1568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1569 "Adding HELLO without addresses for peer `%s'\n",
1571 h = GNUNET_HELLO_create (&pid.public_key, NULL, NULL, friend);
1572 GNUNET_PEERINFO_add_peer (GST_peerinfo, h, NULL, NULL);
1578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1579 "Validation received HELLO message for peer `%s' with size %u, checking for new addresses\n",
1581 ntohs (hello->size));
1583 GNUNET_assert (NULL ==
1584 GNUNET_HELLO_iterate_addresses (hm,
1586 &validate_address_iterator,
1593 * Closure for #iterate_addresses().
1595 struct IteratorContext
1598 * Function to call on each address.
1600 GST_ValidationAddressCallback cb;
1603 * Closure for @e cb.
1611 * Call the callback in the closure for each validation entry.
1613 * @param cls the `struct IteratorContext`
1614 * @param key the peer's identity
1615 * @param value the `struct ValidationEntry`
1616 * @return #GNUNET_OK (continue to iterate)
1619 iterate_addresses (void *cls,
1620 const struct GNUNET_PeerIdentity *key,
1623 struct IteratorContext *ic = cls;
1624 struct ValidationEntry *ve = value;
1628 ve->revalidation_block,
1635 * Call the given function for each address for the given target.
1636 * Can either give a snapshot (synchronous API) or be continuous.
1638 * @param target peer information is requested for
1639 * @param cb function to call; will not be called after this function returns
1640 * @param cb_cls closure for @a cb
1643 GST_validation_get_addresses (const struct GNUNET_PeerIdentity *target,
1644 GST_ValidationAddressCallback cb,
1647 struct IteratorContext ic;
1651 GNUNET_CONTAINER_multipeermap_get_multiple (validation_map,
1653 &iterate_addresses, &ic);
1658 * Update if we are using an address for a connection actively right now.
1659 * Based on this, the validation module will measure latency for the
1660 * address more or less often.
1662 * @param address the address that we are now using (or not)
1663 * @param in_use #GNUNET_YES if we are now using the address for a connection,
1664 * #GNUNET_NO if we are no longer using the address for a connection
1667 GST_validation_set_address_use (const struct GNUNET_HELLO_Address *address,
1670 struct ValidationEntry *ve;
1672 if (GNUNET_HELLO_address_check_option (address,
1673 GNUNET_HELLO_ADDRESS_INFO_INBOUND))
1674 return; /* ignore inbound for validation */
1675 if (NULL == GST_plugins_find (address->transport_name))
1677 /* How can we use an address for which we don't have the plugin? */
1681 ve = find_validation_entry (address);
1687 if (in_use == ve->in_use)
1689 ve->in_use = in_use;
1690 if (GNUNET_YES == in_use)
1692 /* from now on, higher frequeny, so reschedule now */
1693 if (NULL != ve->revalidation_task)
1694 GNUNET_SCHEDULER_cancel (ve->revalidation_task);
1695 ve->revalidation_task = GNUNET_SCHEDULER_add_now (&revalidate_address,
1702 * Closure for the validation_entries_iterate function.
1704 struct ValidationIteratorContext
1707 * Function to call on each validation entry
1709 GST_ValidationChangedCallback cb;
1712 * Closure for @e cb.
1719 * Function called on each entry in the validation map.
1720 * Passes the information from the validation entry to
1721 * the callback given in the closure.
1723 * @param cls the `struct ValidationIteratorContext`
1724 * @param key peer this is about
1725 * @param value the `struct ValidationEntry`
1726 * @return #GNUNET_OK (continue to iterate)
1729 validation_entries_iterate (void *cls,
1730 const struct GNUNET_PeerIdentity *key,
1733 struct ValidationIteratorContext *ic = cls;
1734 struct ValidationEntry *ve = value;
1736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1737 "Notifying about validation entry for peer `%s' address `%s' \n",
1738 GNUNET_i2s (&ve->address->peer),
1739 GST_plugins_a2s (ve->address));
1744 ve->next_validation,
1751 * Iterate over all iteration entries
1753 * @param cb function to call
1754 * @param cb_cls closure for @a cb
1757 GST_validation_iterate (GST_ValidationChangedCallback cb,
1760 struct ValidationIteratorContext ic;
1762 if (NULL == validation_map)
1763 return; /* can happen during shutdown */
1766 GNUNET_CONTAINER_multipeermap_iterate (validation_map,
1767 &validation_entries_iterate,
1771 /* end of file gnunet-service-transport_validation.c */