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_ATS:
158 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
160 case GNUNET_TRANSPORT_PS_CONNECTED:
161 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
162 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
163 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
165 case GNUNET_TRANSPORT_PS_DISCONNECT:
166 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
169 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
170 "Unhandled state `%s' \n",
171 GNUNET_TRANSPORT_ps2s (state));
175 return GNUNET_SYSERR;
179 * Convert peer state to human-readable string.
181 * @param state the state value
182 * @return corresponding string
185 GNUNET_TRANSPORT_ps2s (enum GNUNET_TRANSPORT_PeerState state)
189 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
190 return "S_NOT_CONNECTED";
191 case GNUNET_TRANSPORT_PS_INIT_ATS:
193 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
194 return "S_CONNECT_SENT";
195 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
196 return "S_CONNECT_RECV_ATS";
197 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
198 return "S_CONNECT_RECV_ACK";
199 case GNUNET_TRANSPORT_PS_CONNECTED:
200 return "S_CONNECTED";
201 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
202 return "S_RECONNECT_ATS";
203 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
204 return "S_RECONNECT_SENT";
205 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
206 return "S_CONNECTED_SWITCHING_CONNECT_SENT";
207 case GNUNET_TRANSPORT_PS_DISCONNECT:
208 return "S_DISCONNECT";
209 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
210 return "S_DISCONNECT_FINISHED";
218 * Convert validation state to human-readable string.
220 * @param state the state value
221 * @return corresponding string
224 GNUNET_TRANSPORT_vs2s (enum GNUNET_TRANSPORT_ValidationState state)
228 case GNUNET_TRANSPORT_VS_NONE:
230 case GNUNET_TRANSPORT_VS_NEW:
232 case GNUNET_TRANSPORT_VS_REMOVE:
234 case GNUNET_TRANSPORT_VS_TIMEOUT:
236 case GNUNET_TRANSPORT_VS_UPDATE:
246 * Function called with responses from the service.
248 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
249 * @param msg NULL on timeout or error, otherwise presumably a
250 * message with the human-readable address
253 peer_response_processor (void *cls, const struct GNUNET_MessageHeader *msg);
257 * Function called with responses from the service.
259 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
260 * @param msg NULL on timeout or error, otherwise presumably a
261 * message with the human-readable address
264 val_response_processor (void *cls, const struct GNUNET_MessageHeader *msg);
267 * Send our subscription request to the service.
269 * @param pal_ctx our context
272 send_peer_mon_request (struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx)
274 struct PeerMonitorMessage msg;
276 msg.header.size = htons (sizeof (struct PeerMonitorMessage));
277 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_REQUEST);
278 msg.one_shot = htonl (pal_ctx->one_shot);
279 msg.peer = pal_ctx->peer;
280 GNUNET_assert (GNUNET_OK ==
281 GNUNET_CLIENT_transmit_and_get_response (pal_ctx->client,
283 GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout),
285 &peer_response_processor,
290 * Send our subscription request to the service.
292 * @param val_ctx our context
295 send_val_mon_request (struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx)
297 struct ValidationMonitorMessage msg;
299 msg.header.size = htons (sizeof (struct ValidationMonitorMessage));
300 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_REQUEST);
301 msg.one_shot = htonl (val_ctx->one_shot);
302 msg.peer = val_ctx->peer;
303 GNUNET_assert (GNUNET_OK ==
304 GNUNET_CLIENT_transmit_and_get_response (val_ctx->client,
306 GNUNET_TIME_absolute_get_remaining (val_ctx->timeout),
308 &val_response_processor,
313 * Task run to re-establish the connection.
315 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
316 * @param tc scheduler context, unused
319 do_peer_connect (void *cls,
320 const struct GNUNET_SCHEDULER_TaskContext *tc)
322 struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx = cls;
324 pal_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
325 pal_ctx->client = GNUNET_CLIENT_connect ("transport", pal_ctx->cfg);
326 GNUNET_assert (NULL != pal_ctx->client);
327 send_peer_mon_request (pal_ctx);
332 * Cut the existing connection and reconnect.
334 * @param pal_ctx our context
337 reconnect_peer_ctx (struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx)
339 GNUNET_assert (GNUNET_NO == pal_ctx->one_shot);
340 GNUNET_CLIENT_disconnect (pal_ctx->client);
341 pal_ctx->client = NULL;
342 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
343 GNUNET_TRANSPORT_PS_NOT_CONNECTED,
344 GNUNET_TIME_UNIT_ZERO_ABS);
345 pal_ctx->backoff = GNUNET_TIME_STD_BACKOFF (pal_ctx->backoff);
346 pal_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (pal_ctx->backoff,
353 * Task run to re-establish the connection.
355 * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
356 * @param tc scheduler context, unused
359 do_val_connect (void *cls,
360 const struct GNUNET_SCHEDULER_TaskContext *tc)
362 struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx = cls;
364 val_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
365 val_ctx->client = GNUNET_CLIENT_connect ("transport", val_ctx->cfg);
366 GNUNET_assert (NULL != val_ctx->client);
367 send_val_mon_request (val_ctx);
371 * Cut the existing connection and reconnect.
373 * @param val_ctx our context
376 reconnect_val_ctx (struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx)
378 GNUNET_assert (GNUNET_NO == val_ctx->one_shot);
379 GNUNET_CLIENT_disconnect (val_ctx->client);
380 val_ctx->client = NULL;
381 /* notify clients about (re)connect */
382 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
383 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
384 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_TIMEOUT);
385 val_ctx->backoff = GNUNET_TIME_STD_BACKOFF (val_ctx->backoff);
386 val_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (val_ctx->backoff,
393 * Function called with responses from the service.
395 * @param cls our `struct GNUNET_TRANSPORT_PeerMonitoringContext *`
396 * @param msg NULL on timeout or error, otherwise presumably a
397 * message with the human-readable address
400 val_response_processor (void *cls,
401 const struct GNUNET_MessageHeader *msg)
403 struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx = cls;
404 struct ValidationIterateResponseMessage *vr_msg;
405 struct GNUNET_HELLO_Address *address;
407 const char *transport_name;
414 if (val_ctx->one_shot)
417 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
418 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
419 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_TIMEOUT);
420 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
424 reconnect_val_ctx (val_ctx);
428 size = ntohs (msg->size);
429 GNUNET_break (ntohs (msg->type) ==
430 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE);
432 if (size == sizeof (struct GNUNET_MessageHeader))
435 if (val_ctx->one_shot)
437 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
438 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
439 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
440 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
444 reconnect_val_ctx (val_ctx);
449 if ((size < sizeof (struct ValidationIterateResponseMessage)) ||
450 (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE))
453 if (val_ctx->one_shot)
455 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
456 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
457 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
458 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
462 reconnect_val_ctx (val_ctx);
467 vr_msg = (struct ValidationIterateResponseMessage *) msg;
468 tlen = ntohl (vr_msg->pluginlen);
469 alen = ntohl (vr_msg->addrlen);
471 if (size != sizeof (struct ValidationIterateResponseMessage) + tlen + alen)
474 if (val_ctx->one_shot)
476 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
477 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
478 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
479 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
483 reconnect_val_ctx (val_ctx);
487 if ( (0 == tlen) && (0 == alen) )
490 if (val_ctx->one_shot)
492 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
493 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
494 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
495 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
499 reconnect_val_ctx (val_ctx);
507 GNUNET_break (0); /* This must not happen: address without plugin */
510 addr = (const char *) &vr_msg[1];
511 transport_name = &addr[alen];
513 if (transport_name[tlen - 1] != '\0')
515 /* Corrupt plugin name */
517 if (val_ctx->one_shot)
519 val_ctx->cb (val_ctx->cb_cls, NULL, NULL,
520 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS,
521 GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE);
522 GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx);
526 reconnect_val_ctx (val_ctx);
532 address = GNUNET_HELLO_address_allocate (&vr_msg->peer,
533 transport_name, addr, alen, ntohl(vr_msg->local_address_info));
534 val_ctx->cb (val_ctx->cb_cls, &vr_msg->peer, address,
535 GNUNET_TIME_absolute_ntoh(vr_msg->last_validation),
536 GNUNET_TIME_absolute_ntoh(vr_msg->valid_until),
537 GNUNET_TIME_absolute_ntoh(vr_msg->next_validation),
538 ntohl(vr_msg->state));
539 GNUNET_HELLO_address_free (address);
541 /* expect more replies */
542 GNUNET_CLIENT_receive (val_ctx->client,
543 &val_response_processor,
545 GNUNET_TIME_absolute_get_remaining (val_ctx->timeout));
550 * Function called with responses from the service.
552 * @param cls our `struct GNUNET_TRANSPORT_PeerMonitoringContext *`
553 * @param msg NULL on timeout or error, otherwise presumably a
554 * message with the human-readable address
557 peer_response_processor (void *cls,
558 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 /* iteration finished */
593 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
594 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
595 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
599 reconnect_peer_ctx (pal_ctx);
604 if ((size < sizeof (struct PeerIterateResponseMessage)) ||
605 (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_RESPONSE))
608 if (pal_ctx->one_shot)
610 /* iteration finished (with error) */
611 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
612 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
613 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
617 reconnect_peer_ctx (pal_ctx);
622 pir_msg = (struct PeerIterateResponseMessage *) msg;
623 tlen = ntohl (pir_msg->pluginlen);
624 alen = ntohl (pir_msg->addrlen);
626 if (size != sizeof (struct PeerIterateResponseMessage) + tlen + alen)
629 if (pal_ctx->one_shot)
631 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
632 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
633 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
637 reconnect_peer_ctx (pal_ctx);
642 if ( (0 == tlen) && (0 == alen) )
644 /* No address available */
645 pal_ctx->cb (pal_ctx->cb_cls, &pir_msg->peer, NULL,
646 ntohl(pir_msg->state),
647 GNUNET_TIME_absolute_ntoh (pir_msg->state_timeout));
653 GNUNET_break (0); /* This must not happen: address without plugin */
656 addr = (const char *) &pir_msg[1];
657 transport_name = &addr[alen];
659 if (transport_name[tlen - 1] != '\0')
661 /* Corrupt plugin name */
663 if (pal_ctx->one_shot)
665 pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL,
666 GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_ZERO_ABS);
667 GNUNET_TRANSPORT_monitor_peers_cancel (pal_ctx);
671 reconnect_peer_ctx (pal_ctx);
677 address = GNUNET_HELLO_address_allocate (&pir_msg->peer,
678 transport_name, addr, alen, ntohl(pir_msg->local_address_info));
679 pal_ctx->cb (pal_ctx->cb_cls, &pir_msg->peer, address,
680 ntohl(pir_msg->state),
681 GNUNET_TIME_absolute_ntoh (pir_msg->state_timeout));
682 GNUNET_HELLO_address_free (address);
686 /* expect more replies */
687 GNUNET_CLIENT_receive (pal_ctx->client, &peer_response_processor,
689 GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout));
694 * Return information about a specific peer or all peers currently known to
695 * transport service once or in monitoring mode. To obtain information about
696 * a specific peer, a peer identity can be passed. To obtain information about
697 * all peers currently known to transport service, NULL can be passed as peer
700 * For each peer, the callback is called with information about the address used
701 * to communicate with this peer, the state this peer is currently in and the
702 * the current timeout for this state.
704 * Upon completion, the 'GNUNET_TRANSPORT_PeerIterateCallback' is called one
705 * more time with 'NULL'. After this, the operation must no longer be
706 * explicitly canceled.
708 * The #GNUNET_TRANSPORT_monitor_peers_cancel call MUST not be called in the
711 * @param cfg configuration to use
712 * @param peer a specific peer identity to obtain information for,
714 * @param one_shot #GNUNET_YES to return the current state and then end (with NULL+NULL),
715 * #GNUNET_NO to monitor peers continuously
716 * @param timeout how long is the lookup allowed to take at most
717 * @param peer_callback function to call with the results
718 * @param peer_callback_cls closure for @a peer_address_callback
720 struct GNUNET_TRANSPORT_PeerMonitoringContext *
721 GNUNET_TRANSPORT_monitor_peers (const struct GNUNET_CONFIGURATION_Handle *cfg,
722 const struct GNUNET_PeerIdentity *peer,
724 struct GNUNET_TIME_Relative timeout,
725 GNUNET_TRANSPORT_PeerIterateCallback peer_callback,
726 void *peer_callback_cls)
728 struct GNUNET_TRANSPORT_PeerMonitoringContext *pal_ctx;
729 struct GNUNET_CLIENT_Connection *client;
731 client = GNUNET_CLIENT_connect ("transport", cfg);
734 if (GNUNET_YES != one_shot)
735 timeout = GNUNET_TIME_UNIT_FOREVER_REL;
736 pal_ctx = GNUNET_new (struct GNUNET_TRANSPORT_PeerMonitoringContext);
737 pal_ctx->cb = peer_callback;
738 pal_ctx->cb_cls = peer_callback_cls;
740 pal_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
742 pal_ctx->peer = *peer;
743 pal_ctx->one_shot = one_shot;
744 pal_ctx->client = client;
745 send_peer_mon_request (pal_ctx);
752 * Cancel request to monitor peers
754 * @param pic handle for the request to cancel
757 GNUNET_TRANSPORT_monitor_peers_cancel (struct GNUNET_TRANSPORT_PeerMonitoringContext *pic)
759 if (NULL != pic->client)
761 GNUNET_CLIENT_disconnect (pic->client);
764 if (GNUNET_SCHEDULER_NO_TASK != pic->reconnect_task)
766 GNUNET_SCHEDULER_cancel (pic->reconnect_task);
767 pic->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
774 * Return information about pending address validation operations for a specific
777 * @param cfg configuration to use
778 * @param peer a specific peer identity to obtain validation entries for,
780 * @param one_shot GNUNET_YES to return all entries and then end (with NULL+NULL),
781 * GNUNET_NO to monitor validation entries continuously
782 * @param timeout how long is the lookup allowed to take at most
783 * @param validation_callback function to call with the results
784 * @param validation_callback_cls closure for peer_address_callback
786 struct GNUNET_TRANSPORT_ValidationMonitoringContext *
787 GNUNET_TRANSPORT_monitor_validation_entries (const struct
788 GNUNET_CONFIGURATION_Handle *cfg,
789 const struct GNUNET_PeerIdentity *peer,
791 struct GNUNET_TIME_Relative timeout,
792 GNUNET_TRANSPORT_ValidationIterateCallback validation_callback,
793 void *validation_callback_cls)
795 struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx;
796 struct GNUNET_CLIENT_Connection *client;
798 client = GNUNET_CLIENT_connect ("transport", cfg);
801 if (GNUNET_YES != one_shot)
802 timeout = GNUNET_TIME_UNIT_FOREVER_REL;
803 val_ctx = GNUNET_new (struct GNUNET_TRANSPORT_ValidationMonitoringContext);
804 val_ctx->cb = validation_callback;
805 val_ctx->cb_cls = validation_callback_cls;
807 val_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
809 val_ctx->peer = *peer;
810 val_ctx->one_shot = one_shot;
811 val_ctx->client = client;
812 send_val_mon_request (val_ctx);
819 * Return information about all current pending validation operations
821 * @param vic handle for the request to cancel
824 GNUNET_TRANSPORT_monitor_validation_entries_cancel (struct GNUNET_TRANSPORT_ValidationMonitoringContext *vic)
826 if (NULL != vic->client)
828 GNUNET_CLIENT_disconnect (vic->client);
831 if (GNUNET_SCHEDULER_NO_TASK != vic->reconnect_task)
833 GNUNET_SCHEDULER_cancel (vic->reconnect_task);
834 vic->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
840 /* end of transport_api_monitoring.c */