2 This file is part of GNUnet.
3 (C) 2009, 2010 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 transport/transport_api_monitoring.c
23 * @brief montoring api for transport peer status and validation entries
25 * This api provides the ability to query the transport service about
26 * the status of a specific or all peers as well as address validation entries.
28 * Calls back with information about peer(s) including address used, state and
29 * state timeout for peer requests and address, address lifetime and next revalidation
30 * for validation entries.
33 #include "gnunet_util_lib.h"
34 #include "gnunet_arm_service.h"
35 #include "gnunet_hello_lib.h"
36 #include "gnunet_protocols.h"
37 #include "gnunet_transport_service.h"
38 #include "transport.h"
41 * Context for iterating validation entries.
43 struct GNUNET_TRANSPORT_PeerMonitoringContext
46 * Function to call with the binary address.
48 GNUNET_TRANSPORT_PeerIterateCallback cb;
56 * Connection to the service.
58 struct GNUNET_CLIENT_Connection *client;
61 * Configuration we use.
63 const struct GNUNET_CONFIGURATION_Handle *cfg;
66 * When should this operation time out?
68 struct GNUNET_TIME_Absolute timeout;
71 * Backoff for reconnect.
73 struct GNUNET_TIME_Relative backoff;
76 * Task ID for reconnect.
78 GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
81 * Identity of the peer to monitor.
83 struct GNUNET_PeerIdentity peer;
86 * Was this a one-shot request?
93 * Context for the address lookup.
95 struct GNUNET_TRANSPORT_ValidationMonitoringContext
98 * Function to call with the binary address.
100 GNUNET_TRANSPORT_ValidationIterateCallback cb;
108 * Connection to the service.
110 struct GNUNET_CLIENT_Connection *client;
113 * Configuration we use.
115 const struct GNUNET_CONFIGURATION_Handle *cfg;
118 * When should this operation time out?
120 struct GNUNET_TIME_Absolute timeout;
123 * Backoff for reconnect.
125 struct GNUNET_TIME_Relative backoff;
128 * Task ID for reconnect.
130 GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
133 * Identity of the peer to monitor.
135 struct GNUNET_PeerIdentity peer;
138 * Was this a one-shot request?
144 * Check if a state is defined as connected
146 * @param state the state value
147 * @return GNUNET_YES or GNUNET_NO
150 GNUNET_TRANSPORT_is_connected (enum GNUNET_TRANSPORT_PeerState state)
154 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
155 case GNUNET_TRANSPORT_PS_INIT_ATS:
156 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
157 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
158 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
159 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
160 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
162 case GNUNET_TRANSPORT_PS_CONNECTED:
163 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
164 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
165 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
166 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
167 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
169 case GNUNET_TRANSPORT_PS_DISCONNECT:
170 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
173 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
174 "Unhandled state `%s' \n",
175 GNUNET_TRANSPORT_ps2s (state));
179 return GNUNET_SYSERR;
183 * Convert peer state to human-readable string.
185 * @param state the state value
186 * @return corresponding string
189 GNUNET_TRANSPORT_ps2s (enum GNUNET_TRANSPORT_PeerState state)
193 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
194 return "S_NOT_CONNECTED";
195 case GNUNET_TRANSPORT_PS_INIT_ATS:
197 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
198 return "S_CONNECT_SENT";
199 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
200 return "S_CONNECT_RECV_BLACKLIST_INBOUND";
201 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
202 return "S_CONNECT_RECV_ATS";
203 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
204 return "S_CONNECT_RECV_BLACKLIST";
205 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
206 return "S_CONNECT_RECV_ACK";
207 case GNUNET_TRANSPORT_PS_CONNECTED:
208 return "S_CONNECTED";
209 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
210 return "S_RECONNECT_ATS";
211 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
212 return "S_RECONNECT_BLACKLIST";
213 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
214 return "S_RECONNECT_SENT";
215 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
216 return "S_CONNECTED_SWITCHING_BLACKLIST";
217 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
218 return "S_CONNECTED_SWITCHING_CONNECT_SENT";
219 case GNUNET_TRANSPORT_PS_DISCONNECT:
220 return "S_DISCONNECT";
221 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
222 return "S_DISCONNECT_FINISHED";
230 * Convert validation state to human-readable string.
232 * @param state the state value
233 * @return corresponding string
236 GNUNET_TRANSPORT_vs2s (enum GNUNET_TRANSPORT_ValidationState state)
240 case GNUNET_TRANSPORT_VS_NONE:
242 case GNUNET_TRANSPORT_VS_NEW:
244 case GNUNET_TRANSPORT_VS_REMOVE:
246 case GNUNET_TRANSPORT_VS_TIMEOUT:
248 case GNUNET_TRANSPORT_VS_UPDATE:
258 * Function called with responses from the service.
260 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
261 * @param msg NULL on timeout or error, otherwise presumably a
262 * message with the human-readable address
265 peer_response_processor (void *cls, const struct GNUNET_MessageHeader *msg);
269 * Function called with responses from the service.
271 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
272 * @param msg NULL on timeout or error, otherwise presumably a
273 * message with the human-readable address
276 val_response_processor (void *cls, const struct GNUNET_MessageHeader *msg);
279 * Send our subscription request to the service.
281 * @param pal_ctx our context
284 send_peer_mon_request (struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx)
286 struct PeerMonitorMessage msg;
288 msg.header.size = htons (sizeof (struct PeerMonitorMessage));
289 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_REQUEST);
290 msg.one_shot = htonl (pal_ctx->one_shot);
291 msg.peer = pal_ctx->peer;
292 GNUNET_assert (GNUNET_OK ==
293 GNUNET_CLIENT_transmit_and_get_response (pal_ctx->client,
295 GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout),
297 &peer_response_processor,
302 * Send our subscription request to the service.
304 * @param val_ctx our context
307 send_val_mon_request (struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx)
309 struct ValidationMonitorMessage msg;
311 msg.header.size = htons (sizeof (struct ValidationMonitorMessage));
312 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_REQUEST);
313 msg.one_shot = htonl (val_ctx->one_shot);
314 msg.peer = val_ctx->peer;
315 GNUNET_assert (GNUNET_OK ==
316 GNUNET_CLIENT_transmit_and_get_response (val_ctx->client,
318 GNUNET_TIME_absolute_get_remaining (val_ctx->timeout),
320 &val_response_processor,
325 * Task run to re-establish the connection.
327 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
328 * @param tc scheduler context, unused
331 do_peer_connect (void *cls,
332 const struct GNUNET_SCHEDULER_TaskContext *tc)
334 struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx = cls;
336 pal_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
337 pal_ctx->client = GNUNET_CLIENT_connect ("transport", pal_ctx->cfg);
338 GNUNET_assert (NULL != pal_ctx->client);
339 send_peer_mon_request (pal_ctx);
344 * Cut the existing connection and reconnect.
346 * @param pal_ctx our context
349 reconnect_peer_ctx (struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx)
351 GNUNET_assert (GNUNET_NO == pal_ctx->one_shot);
352 GNUNET_CLIENT_disconnect (pal_ctx->client);
353 pal_ctx->client = NULL;
354 pal_ctx->backoff = GNUNET_TIME_STD_BACKOFF (pal_ctx->backoff);
355 pal_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (pal_ctx->backoff,
362 * Task run to re-establish the connection.
364 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
365 * @param tc scheduler context, unused
368 do_val_connect (void *cls,
369 const struct GNUNET_SCHEDULER_TaskContext *tc)
371 struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx = cls;
373 val_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
374 val_ctx->client = GNUNET_CLIENT_connect ("transport", val_ctx->cfg);
375 GNUNET_assert (NULL != val_ctx->client);
376 send_val_mon_request (val_ctx);
380 * Cut the existing connection and reconnect.
382 * @param val_ctx our context
385 reconnect_val_ctx (struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx)
387 GNUNET_assert (GNUNET_NO == val_ctx->one_shot);
388 GNUNET_CLIENT_disconnect (val_ctx->client);
389 val_ctx->client = NULL;
390 val_ctx->backoff = GNUNET_TIME_STD_BACKOFF (val_ctx->backoff);
391 val_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (val_ctx->backoff,
397 * Function called with responses from the service.
399 * @param cls our 'struct GNUNET_TRANSPORT_PeerMonitoringContext*'
400 * @param msg NULL on timeout or error, otherwise presumably a
401 * message with the human-readable address
404 val_response_processor (void *cls, const struct GNUNET_MessageHeader *msg)
406 struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx = cls;
407 struct ValidationIterateResponseMessage *vr_msg;
408 struct GNUNET_HELLO_Address *address;
410 const char *transport_name;
417 if (val_ctx->one_shot)
420 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
421 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
422 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_TIMEOUT);
423 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
427 reconnect_val_ctx (val_ctx);
431 size = ntohs (msg->size);
432 GNUNET_break (ntohs (msg->type) ==
433 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE);
435 if (size == sizeof (struct GNUNET_MessageHeader))
438 if (val_ctx->one_shot)
440 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
441 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
442 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
443 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
447 reconnect_val_ctx (val_ctx);
452 if ((size < sizeof (struct ValidationIterateResponseMessage)) ||
453 (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE))
456 if (val_ctx->one_shot)
458 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
459 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
460 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
461 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
465 reconnect_val_ctx (val_ctx);
470 vr_msg = (struct ValidationIterateResponseMessage *) msg;
471 tlen = ntohl (vr_msg->pluginlen);
472 alen = ntohl (vr_msg->addrlen);
474 if (size != sizeof (struct ValidationIterateResponseMessage) + tlen + alen)
477 if (val_ctx->one_shot)
479 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
480 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
481 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
482 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
486 reconnect_val_ctx (val_ctx);
490 if ( (0 == tlen) && (0 == alen) )
493 if (val_ctx->one_shot)
495 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
496 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
497 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
498 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
502 reconnect_val_ctx (val_ctx);
510 GNUNET_break (0); /* This must not happen: address without plugin */
513 addr = (const char *) &vr_msg[1];
514 transport_name = &addr[alen];
516 if (transport_name[tlen - 1] != '\0')
518 /* Corrupt plugin name */
520 if (val_ctx->one_shot)
522 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
523 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
524 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
525 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
529 reconnect_val_ctx (val_ctx);
535 address = GNUNET_HELLO_address_allocate (&vr_msg->peer,
536 transport_name, addr, alen, ntohl(vr_msg->local_address_info));
537 val_ctx->cb (val_ctx->cb_cls, &vr_msg->peer, address,
538 GNUNET_TIME_absolute_ntoh(vr_msg->last_validation),
539 GNUNET_TIME_absolute_ntoh(vr_msg->valid_until),
540 GNUNET_TIME_absolute_ntoh(vr_msg->next_validation),
541 ntohl(vr_msg->state));
542 GNUNET_HELLO_address_free (address);
544 /* expect more replies */
545 GNUNET_CLIENT_receive (val_ctx->client, &val_response_processor,
546 val_ctx, GNUNET_TIME_absolute_get_remaining (val_ctx->timeout));
551 * Function called with responses from the service.
553 * @param cls our 'struct GNUNET_TRANSPORT_PeerMonitoringContext*'
554 * @param msg NULL on timeout or error, otherwise presumably a
555 * message with the human-readable address
558 peer_response_processor (void *cls, const struct GNUNET_MessageHeader *msg)
560 struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx = cls;
561 struct PeerIterateResponseMessage *pir_msg;
562 struct GNUNET_HELLO_Address *address;
564 const char *transport_name;
571 if (pal_ctx->one_shot)
574 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
575 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
576 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
580 reconnect_peer_ctx (pal_ctx);
584 size = ntohs (msg->size);
585 GNUNET_break (ntohs (msg->type) ==
586 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_RESPONSE);
587 if (size == sizeof (struct GNUNET_MessageHeader))
590 if (pal_ctx->one_shot)
592 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
593 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
594 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
598 reconnect_peer_ctx (pal_ctx);
603 if ((size < sizeof (struct PeerIterateResponseMessage)) ||
604 (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_RESPONSE))
607 if (pal_ctx->one_shot)
609 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
610 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
611 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
615 reconnect_peer_ctx (pal_ctx);
620 pir_msg = (struct PeerIterateResponseMessage *) msg;
621 tlen = ntohl (pir_msg->pluginlen);
622 alen = ntohl (pir_msg->addrlen);
624 if (size != sizeof (struct PeerIterateResponseMessage) + tlen + alen)
627 if (pal_ctx->one_shot)
629 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
630 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
631 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
635 reconnect_peer_ctx (pal_ctx);
640 if ( (0 == tlen) && (0 == alen) )
642 /* No address available */
643 pal_ctx->cb (pal_ctx->cb_cls, &pir_msg->peer, NULL,
644 ntohl(pir_msg->state),
645 GNUNET_TIME_absolute_ntoh (pir_msg->state_timeout));
651 GNUNET_break (0); /* This must not happen: address without plugin */
654 addr = (const char *) &pir_msg[1];
655 transport_name = &addr[alen];
657 if (transport_name[tlen - 1] != '\0')
659 /* Corrupt plugin name */
661 if (pal_ctx->one_shot)
663 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
664 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
665 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
669 reconnect_peer_ctx (pal_ctx);
675 address = GNUNET_HELLO_address_allocate (&pir_msg->peer,
676 transport_name, addr, alen, ntohl(pir_msg->local_address_info));
677 pal_ctx->cb (pal_ctx->cb_cls, &pir_msg->peer, address,
678 ntohl(pir_msg->state),
679 GNUNET_TIME_absolute_ntoh (pir_msg->state_timeout));
680 GNUNET_HELLO_address_free (address);
684 /* expect more replies */
685 GNUNET_CLIENT_receive (pal_ctx->client, &peer_response_processor,
687 GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout));
692 * Return information about a specific peer or all peers currently known to
693 * transport service once or in monitoring mode. To obtain information about
694 * a specific peer, a peer identity can be passed. To obtain information about
695 * all peers currently known to transport service, NULL can be passed as peer
698 * For each peer, the callback is called with information about the address used
699 * to communicate with this peer, the state this peer is currently in and the
700 * the current timeout for this state.
702 * Upon completion, the 'GNUNET_TRANSPORT_PeerIterateCallback' is called one
703 * more time with 'NULL'. After this, the operation must no longer be
704 * explicitly canceled.
706 * The #GNUNET_TRANSPORT_monitor_peers_cancel call MUST not be called in the
709 * @param cfg configuration to use
710 * @param peer a specific peer identity to obtain information for,
712 * @param one_shot GNUNET_YES to return the current state and then end (with NULL+NULL),
713 * GNUNET_NO to monitor peers continuously
714 * @param timeout how long is the lookup allowed to take at most
715 * @param peer_callback function to call with the results
716 * @param peer_callback_cls closure for peer_address_callback
718 struct GNUNET_TRANSPORT_PeerMonitoringContext *
719 GNUNET_TRANSPORT_monitor_peers (const struct GNUNET_CONFIGURATION_Handle *cfg,
720 const struct GNUNET_PeerIdentity *peer,
722 struct GNUNET_TIME_Relative timeout,
723 GNUNET_TRANSPORT_PeerIterateCallback peer_callback,
724 void *peer_callback_cls)
726 struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx;
727 struct GNUNET_CLIENT_Connection *client;
729 client = GNUNET_CLIENT_connect ("transport", cfg);
732 if (GNUNET_YES != one_shot)
733 timeout = GNUNET_TIME_UNIT_FOREVER_REL;
734 pal_ctx = GNUNET_new (struct GNUNET_TRANSPORT_PeerMonitoringContext);
735 pal_ctx->cb = peer_callback;
736 pal_ctx->cb_cls = peer_callback_cls;
738 pal_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
740 pal_ctx->peer = *peer;
741 pal_ctx->one_shot = one_shot;
742 pal_ctx->client = client;
743 send_peer_mon_request (pal_ctx);
750 * Cancel request to monitor peers
752 * @param pic handle for the request to cancel
755 GNUNET_TRANSPORT_monitor_peers_cancel (struct GNUNET_TRANSPORT_PeerMonitoringContext *pic)
757 if (NULL != pic->client)
759 GNUNET_CLIENT_disconnect (pic->client);
762 if (GNUNET_SCHEDULER_NO_TASK != pic->reconnect_task)
764 GNUNET_SCHEDULER_cancel (pic->reconnect_task);
765 pic->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
772 * Return information about pending address validation operations for a specific
775 * @param cfg configuration to use
776 * @param peer a specific peer identity to obtain validation entries for,
778 * @param one_shot GNUNET_YES to return all entries and then end (with NULL+NULL),
779 * GNUNET_NO to monitor validation entries continuously
780 * @param timeout how long is the lookup allowed to take at most
781 * @param validation_callback function to call with the results
782 * @param validation_callback_cls closure for peer_address_callback
784 struct GNUNET_TRANSPORT_ValidationMonitoringContext *
785 GNUNET_TRANSPORT_monitor_validation_entries (const struct
786 GNUNET_CONFIGURATION_Handle *cfg,
787 const struct GNUNET_PeerIdentity *peer,
789 struct GNUNET_TIME_Relative timeout,
790 GNUNET_TRANSPORT_ValidationIterateCallback validation_callback,
791 void *validation_callback_cls)
793 struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx;
794 struct GNUNET_CLIENT_Connection *client;
796 client = GNUNET_CLIENT_connect ("transport", cfg);
799 if (GNUNET_YES != one_shot)
800 timeout = GNUNET_TIME_UNIT_FOREVER_REL;
801 val_ctx = GNUNET_new (struct GNUNET_TRANSPORT_ValidationMonitoringContext);
802 val_ctx->cb = validation_callback;
803 val_ctx->cb_cls = validation_callback_cls;
805 val_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
807 val_ctx->peer = *peer;
808 val_ctx->one_shot = one_shot;
809 val_ctx->client = client;
810 send_val_mon_request (val_ctx);
817 * Return information about all current pending validation operations
819 * @param vic handle for the request to cancel
822 GNUNET_TRANSPORT_monitor_validation_entries_cancel (struct GNUNET_TRANSPORT_ValidationMonitoringContext *vic)
824 if (NULL != vic->client)
826 GNUNET_CLIENT_disconnect (vic->client);
829 if (GNUNET_SCHEDULER_NO_TASK != vic->reconnect_task)
831 GNUNET_SCHEDULER_cancel (vic->reconnect_task);
832 vic->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
838 /* end of transport_api_monitoring.c */