2 This file is part of GNUnet.
3 (C) 2010-2014 Christian Grothoff (and other contributing authors)
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22 * @file transport/gnunet-service-transport_clients.c
23 * @brief plugin management API
24 * @author Christian Grothoff
27 #include "gnunet-service-transport_blacklist.h"
28 #include "gnunet-service-transport_clients.h"
29 #include "gnunet-service-transport_hello.h"
30 #include "gnunet-service-transport_neighbours.h"
31 #include "gnunet-service-transport_plugins.h"
32 #include "gnunet-service-transport_validation.h"
33 #include "gnunet-service-transport_manipulation.h"
34 #include "gnunet-service-transport.h"
35 #include "transport.h"
39 * How many messages can we have pending for a given client process
40 * before we start to drop incoming messages? We typically should
41 * have only one client and so this would be the primary buffer for
42 * messages, so the number should be chosen rather generously.
44 * The expectation here is that most of the time the queue is large
45 * enough so that a drop is virtually never required. Note that
46 * this value must be about as large as 'TOTAL_MSGS' in the
47 * 'test_transport_api_reliability.c', otherwise that testcase may
50 #define MAX_PENDING (128 * 1024)
54 * Linked list of messages to be transmitted to the client. Each
55 * entry is followed by the actual message.
57 struct ClientMessageQueueEntry
60 * This is a doubly-linked list.
62 struct ClientMessageQueueEntry *next;
65 * This is a doubly-linked list.
67 struct ClientMessageQueueEntry *prev;
72 * Client connected to the transport service.
74 struct TransportClient
78 * This is a doubly-linked list.
80 struct TransportClient *next;
83 * This is a doubly-linked list.
85 struct TransportClient *prev;
88 * Handle to the client.
90 struct GNUNET_SERVER_Client *client;
93 * Linked list of messages yet to be transmitted to
96 struct ClientMessageQueueEntry *message_queue_head;
99 * Tail of linked list of messages yet to be transmitted to the
102 struct ClientMessageQueueEntry *message_queue_tail;
105 * Current transmit request handle.
107 struct GNUNET_SERVER_TransmitHandle *th;
110 * Length of the list of messages pending for this client.
112 unsigned int message_count;
115 * Is this client interested in payload messages?
122 * Context for address to string operations
124 struct AddressToStringContext
127 * This is a doubly-linked list.
129 struct AddressToStringContext *next;
132 * This is a doubly-linked list.
134 struct AddressToStringContext *prev;
137 * Transmission context
139 struct GNUNET_SERVER_TransmitContext* tc;
144 * Client monitoring changes of active addresses of our neighbours.
146 struct MonitoringClient
149 * This is a doubly-linked list.
151 struct MonitoringClient *next;
154 * This is a doubly-linked list.
156 struct MonitoringClient *prev;
159 * Handle to the client.
161 struct GNUNET_SERVER_Client *client;
164 * Peer identity to monitor the addresses of.
165 * Zero to monitor all neighrours.
167 struct GNUNET_PeerIdentity peer;
173 * Head of linked list of all clients to this service.
175 static struct TransportClient *clients_head;
178 * Tail of linked list of all clients to this service.
180 static struct TransportClient *clients_tail;
183 * Head of linked list of all pending address iterations
185 struct AddressToStringContext *a2s_head;
188 * Tail of linked list of all pending address iterations
190 struct AddressToStringContext *a2s_tail;
193 * Head of linked list of monitoring clients.
195 static struct MonitoringClient *peer_monitoring_clients_head;
198 * Tail of linked list of monitoring clients.
200 static struct MonitoringClient *peer_monitoring_clients_tail;
203 * Head of linked list of validation monitoring clients.
205 static struct MonitoringClient *val_monitoring_clients_head;
208 * Tail of linked list of validation monitoring clients.
210 static struct MonitoringClient *val_monitoring_clients_tail;
213 * Notification context, to send updates on changes to active addresses
216 static struct GNUNET_SERVER_NotificationContext *peer_nc;
219 * Notification context, to send updates on changes to active addresses
222 static struct GNUNET_SERVER_NotificationContext *val_nc;
225 * Notification context, to send updates on changes to active plugin
228 static struct GNUNET_SERVER_NotificationContext *plugin_nc;
231 * Plugin monitoring client we are currently syncing, NULL if all
232 * monitoring clients are in sync.
234 static struct GNUNET_SERVER_Client *sync_client;
238 * Find the internal handle associated with the given client handle
240 * @param client server's client handle to look up
241 * @return internal client handle
243 static struct TransportClient *
244 lookup_client (struct GNUNET_SERVER_Client *client)
246 struct TransportClient *tc;
248 for (tc = clients_head; NULL != tc; tc = tc->next)
249 if (tc->client == client)
256 * Create the internal handle for the given server client handle
258 * @param client server's client handle to create our internal handle for
259 * @return fresh internal client handle
261 static struct TransportClient *
262 setup_client (struct GNUNET_SERVER_Client *client)
264 struct TransportClient *tc;
266 GNUNET_assert (NULL == lookup_client (client));
267 tc = GNUNET_new (struct TransportClient);
269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
270 "Client %p connected\n",
277 * Find the handle to the monitoring client associated with the given
280 * @param head the head of the client queue to look in
281 * @param client server's client handle to look up
282 * @return handle to the monitoring client
284 static struct MonitoringClient *
285 lookup_monitoring_client (struct MonitoringClient *head,
286 struct GNUNET_SERVER_Client *client)
288 struct MonitoringClient *mc;
290 for (mc = head; NULL != mc; mc = mc->next)
291 if (mc->client == client)
298 * Setup a new monitoring client using the given server client handle and
301 * @param client server's client handle to create our internal handle for
302 * @param peer identity of the peer to monitor the addresses of,
303 * zero to monitor all neighrours.
304 * @return handle to the new monitoring client
306 static struct MonitoringClient *
307 setup_peer_monitoring_client (struct GNUNET_SERVER_Client *client,
308 const struct GNUNET_PeerIdentity *peer)
310 struct MonitoringClient *mc;
311 static struct GNUNET_PeerIdentity all_zeros;
313 GNUNET_assert (NULL ==
314 lookup_monitoring_client (peer_monitoring_clients_head,
316 mc = GNUNET_new (struct MonitoringClient);
319 GNUNET_CONTAINER_DLL_insert (peer_monitoring_clients_head,
320 peer_monitoring_clients_tail,
322 GNUNET_SERVER_client_mark_monitor (client);
323 GNUNET_SERVER_notification_context_add (peer_nc, client);
325 if (0 != memcmp (peer, &all_zeros, sizeof (struct GNUNET_PeerIdentity)))
326 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
327 "Client %p started monitoring of the peer `%s'\n",
331 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
332 "Client %p started monitoring all peers\n",
339 * Setup a new monitoring client using the given server client handle and
342 * @param client server's client handle to create our internal handle for
343 * @param peer identity of the peer to monitor the addresses of,
344 * zero to monitor all neighrours.
345 * @return handle to the new monitoring client
347 static struct MonitoringClient *
348 setup_val_monitoring_client (struct GNUNET_SERVER_Client *client,
349 struct GNUNET_PeerIdentity *peer)
351 struct MonitoringClient *mc;
352 static struct GNUNET_PeerIdentity all_zeros;
354 GNUNET_assert (NULL ==
355 lookup_monitoring_client (val_monitoring_clients_head,
357 mc = GNUNET_new (struct MonitoringClient);
360 GNUNET_CONTAINER_DLL_insert (val_monitoring_clients_head,
361 val_monitoring_clients_tail,
363 GNUNET_SERVER_notification_context_add (val_nc, client);
365 if (0 != memcmp (peer,
367 sizeof (struct GNUNET_PeerIdentity)))
368 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
369 "Client %p started monitoring of the peer `%s'\n",
370 mc, GNUNET_i2s (peer));
372 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
373 "Client %p started monitoring all peers\n", mc);
379 * Function called to notify a client about the socket being ready to
380 * queue more data. "buf" will be NULL and "size" zero if the socket
381 * was closed for writing in the meantime.
384 * @param size number of bytes available in @a buf
385 * @param buf where the callee should write the message
386 * @return number of bytes written to @a buf
389 transmit_to_client_callback (void *cls,
393 struct TransportClient *tc = cls;
394 struct ClientMessageQueueEntry *q;
395 const struct GNUNET_MessageHeader *msg;
403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
404 "Transmission to client failed, closing connection.\n");
409 while (NULL != (q = tc->message_queue_head))
411 msg = (const struct GNUNET_MessageHeader *) &q[1];
412 msize = ntohs (msg->size);
413 if (msize + tsize > size)
415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
416 "Transmitting message of type %u to client %p.\n",
417 ntohs (msg->type), tc);
418 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head,
419 tc->message_queue_tail,
422 memcpy (&cbuf[tsize], msg, msize);
428 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
430 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
431 GNUNET_TIME_UNIT_FOREVER_REL,
432 &transmit_to_client_callback, tc);
433 GNUNET_assert (NULL != tc->th);
440 * Queue the given message for transmission to the given client
442 * @param tc target of the message
443 * @param msg message to transmit
444 * @param may_drop #GNUNET_YES if the message can be dropped
447 unicast (struct TransportClient *tc,
448 const struct GNUNET_MessageHeader *msg,
451 struct ClientMessageQueueEntry *q;
460 if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
462 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
463 _("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
468 GNUNET_STATISTICS_update (GST_stats,
470 ("# messages dropped due to slow client"), 1,
474 msize = ntohs (msg->size);
475 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
476 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
477 memcpy (&q[1], msg, msize);
478 GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
479 tc->message_queue_tail, q);
484 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
485 GNUNET_TIME_UNIT_FOREVER_REL,
486 &transmit_to_client_callback, tc);
487 GNUNET_assert (NULL != tc->th);
492 * Called whenever a client is disconnected. Frees our
493 * resources associated with that client.
496 * @param client identification of the client
499 client_disconnect_notification (void *cls,
500 struct GNUNET_SERVER_Client *client)
502 struct TransportClient *tc;
503 struct MonitoringClient *mc;
504 struct ClientMessageQueueEntry *mqe;
508 mc = lookup_monitoring_client (peer_monitoring_clients_head,
512 GNUNET_CONTAINER_DLL_remove (peer_monitoring_clients_head,
513 peer_monitoring_clients_tail,
517 mc = lookup_monitoring_client (val_monitoring_clients_head,
521 GNUNET_CONTAINER_DLL_remove (val_monitoring_clients_head,
522 val_monitoring_clients_tail,
526 tc = lookup_client (client);
529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
530 "Client %p disconnected, cleaning up.\n", tc);
531 while (NULL != (mqe = tc->message_queue_head))
533 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
538 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
541 GNUNET_SERVER_notify_transmit_ready_cancel (tc->th);
544 GNUNET_break (0 == tc->message_count);
550 * Function called for each of our connected neighbours. Notify the
551 * client about the existing neighbour.
553 * @param cls the `struct TransportClient *` to notify
554 * @param peer identity of the neighbour
555 * @param address the address
556 * @param state the current state of the peer
557 * @param state_timeout the time out for the state
558 * @param bandwidth_in inbound bandwidth in NBO
559 * @param bandwidth_out outbound bandwidth in NBO
562 notify_client_about_neighbour (void *cls,
563 const struct GNUNET_PeerIdentity *peer,
564 const struct GNUNET_HELLO_Address *address,
565 enum GNUNET_TRANSPORT_PeerState state,
566 struct GNUNET_TIME_Absolute state_timeout,
567 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
568 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
570 struct TransportClient *tc = cls;
571 struct ConnectInfoMessage *cim;
572 size_t size = sizeof (struct ConnectInfoMessage);
573 char buf[size] GNUNET_ALIGN;
575 if (GNUNET_NO == GST_neighbours_test_connected (peer))
578 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
579 cim = (struct ConnectInfoMessage *) buf;
580 cim->header.size = htons (size);
581 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
583 cim->quota_in = bandwidth_in;
584 cim->quota_out = bandwidth_out;
585 unicast (tc, &cim->header, GNUNET_NO);
590 * Initialize a normal client. We got a start message from this
591 * client, add him to the list of clients for broadcasting of inbound
595 * @param client the client
596 * @param message the start message that was sent
599 clients_handle_start (void *cls,
600 struct GNUNET_SERVER_Client *client,
601 const struct GNUNET_MessageHeader *message)
603 const struct StartMessage *start;
604 struct TransportClient *tc;
607 tc = lookup_client (client);
609 GNUNET_log (GNUNET_ERROR_TYPE_INFO | GNUNET_ERROR_TYPE_BULK,
610 "Client %p sent START\n", tc);
613 /* got 'start' twice from the same client, not allowed */
614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
615 "TransportClient %p ServerClient %p sent multiple START messages\n",
618 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
621 start = (const struct StartMessage *) message;
622 options = ntohl (start->options);
623 if ((0 != (1 & options)) &&
625 memcmp (&start->self, &GST_my_identity,
626 sizeof (struct GNUNET_PeerIdentity))))
628 /* client thinks this is a different peer, reject */
629 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
630 _("Rejecting control connection from peer `%s', which is not me!\n"),
631 GNUNET_i2s (&start->self));
632 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
635 tc = setup_client (client);
636 tc->send_payload = (0 != (2 & options));
637 unicast (tc, GST_hello_get (), GNUNET_NO);
638 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
639 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, tc);
640 GNUNET_SERVER_receive_done (client, GNUNET_OK);
645 * Client sent us a HELLO. Process the request.
648 * @param client the client
649 * @param message the HELLO message
652 clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
653 const struct GNUNET_MessageHeader *message)
655 GST_validation_handle_hello (message);
656 GNUNET_SERVER_receive_done (client, GNUNET_OK);
661 * Closure for #handle_send_transmit_continuation()
663 struct SendTransmitContinuationContext
666 * Client that made the request.
668 struct GNUNET_SERVER_Client *client;
671 * Peer that was the target.
673 struct GNUNET_PeerIdentity target;
678 * Function called after the transmission is done. Notify the client that it is
679 * OK to send the next message.
682 * @param success #GNUNET_OK on success, #GNUNET_NO on failure, #GNUNET_SYSERR if we're not connected
683 * @param bytes_payload bytes payload sent
684 * @param bytes_on_wire bytes sent on wire
687 handle_send_transmit_continuation (void *cls, int success,
688 size_t bytes_payload,
689 size_t bytes_on_wire)
691 struct SendTransmitContinuationContext *stcc = cls;
692 struct SendOkMessage send_ok_msg;
694 if (GNUNET_OK == success)
695 GST_neighbours_notify_payload_sent (&stcc->target, bytes_payload);
697 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
698 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
699 send_ok_msg.bytes_msg = htonl (bytes_payload);
700 send_ok_msg.bytes_physical = htonl (bytes_on_wire);
701 send_ok_msg.success = htonl (success);
702 send_ok_msg.latency =
703 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
704 send_ok_msg.peer = stcc->target;
705 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
706 GNUNET_SERVER_client_drop (stcc->client);
712 * Client asked for transmission to a peer. Process the request.
715 * @param client the client
716 * @param message the send message that was sent
719 clients_handle_send (void *cls,
720 struct GNUNET_SERVER_Client *client,
721 const struct GNUNET_MessageHeader *message)
723 const struct OutboundMessage *obm;
724 const struct GNUNET_MessageHeader *obmm;
725 struct SendTransmitContinuationContext *stcc;
728 struct TransportClient *tc;
730 tc = lookup_client (client);
733 /* client asked for transmission before 'START' */
735 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
739 size = ntohs (message->size);
741 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
744 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
747 obm = (const struct OutboundMessage *) message;
748 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
749 msize = size - sizeof (struct OutboundMessage);
750 if (msize < sizeof (struct GNUNET_MessageHeader))
753 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
758 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
760 GNUNET_i2s (&obm->peer),
763 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
765 /* not connected, not allowed to send; can happen due to asynchronous operations */
766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
767 "Could not send message to peer `%s': not connected\n",
768 GNUNET_i2s (&obm->peer));
769 GNUNET_STATISTICS_update (GST_stats,
771 ("# bytes payload dropped (other peer was not connected)"),
773 GNUNET_SERVER_receive_done (client, GNUNET_OK);
776 GNUNET_SERVER_receive_done (client, GNUNET_OK);
777 stcc = GNUNET_new (struct SendTransmitContinuationContext);
778 stcc->target = obm->peer;
779 stcc->client = client;
780 GNUNET_SERVER_client_keep (client);
781 GST_manipulation_send (&obm->peer, obmm, msize,
782 GNUNET_TIME_relative_ntoh (obm->timeout),
783 &handle_send_transmit_continuation, stcc);
788 * Try to initiate a connection to the given peer if the blacklist
791 * @param cls closure (unused, NULL)
792 * @param peer identity of peer that was tested
793 * @param result #GNUNET_OK if the connection is allowed,
797 try_connect_if_allowed (void *cls,
798 const struct GNUNET_PeerIdentity *peer,
801 if (GNUNET_OK != result)
803 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
804 _("Blacklist refuses connection attempt to peer `%s'\n"),
806 return; /* not allowed */
809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
810 _("Blacklist allows connection attempt to peer `%s'\n"),
813 GST_neighbours_try_connect (peer);
818 * Handle request connect message
820 * @param cls closure (always NULL)
821 * @param client identification of the client
822 * @param message the actual message
825 clients_handle_request_connect (void *cls,
826 struct GNUNET_SERVER_Client *client,
827 const struct GNUNET_MessageHeader *message)
829 const struct TransportRequestConnectMessage *trcm =
830 (const struct TransportRequestConnectMessage *) message;
832 if (GNUNET_YES == ntohl (trcm->connect))
834 GNUNET_STATISTICS_update (GST_stats,
836 ("# REQUEST CONNECT messages received"), 1,
839 if (0 == memcmp (&trcm->peer, &GST_my_identity,
840 sizeof (struct GNUNET_PeerIdentity)))
843 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
844 "Received a request connect message myself `%s'\n",
845 GNUNET_i2s (&trcm->peer));
849 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
850 _("Received a request connect message for peer `%s'\n"),
851 GNUNET_i2s (&trcm->peer));
853 (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
857 else if (GNUNET_NO == ntohl (trcm->connect))
859 GNUNET_STATISTICS_update (GST_stats,
861 ("# REQUEST DISCONNECT messages received"), 1,
864 if (0 == memcmp (&trcm->peer, &GST_my_identity,
865 sizeof (struct GNUNET_PeerIdentity)))
868 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
869 "Received a request disconnect message myself `%s'\n",
870 GNUNET_i2s (&trcm->peer));
874 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
875 _("Received a request disconnect message for peer `%s'\n"),
876 GNUNET_i2s (&trcm->peer));
877 (void) GST_neighbours_force_disconnect (&trcm->peer);
883 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
886 GNUNET_SERVER_receive_done (client, GNUNET_OK);
891 * Take the given address and append it to the set of results sent back to
892 * the client. This function may be called serveral times for a single
893 * conversion. The last invocation will be with a @a address of
894 * NULL and a @a res of #GNUNET_OK. Thus, to indicate conversion
895 * errors, the callback might be called first with @a address NULL and
896 * @a res being #GNUNET_SYSERR. In that case, there will still be a
897 * subsequent call later with @a address NULL and @a res #GNUNET_OK.
899 * @param cls the transmission context used (`struct GNUNET_SERVER_TransmitContext *`)
900 * @param buf text to transmit (contains the human-readable address, or NULL)
901 * @param res #GNUNET_OK if conversion was successful, #GNUNET_SYSERR on error,
905 transmit_address_to_client (void *cls,
909 struct AddressToStringContext *actx = cls;
910 struct AddressToStringResultMessage *atsm;
914 GNUNET_assert ( (GNUNET_OK == res) ||
915 (GNUNET_SYSERR == res) );
918 len = sizeof (struct AddressToStringResultMessage);
919 atsm = GNUNET_malloc (len);
920 atsm->header.size = ntohs (len);
921 atsm->header.type = ntohs (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
922 if (GNUNET_OK == res)
924 /* this was the last call, transmit */
925 atsm->res = htonl (GNUNET_OK);
926 atsm->addr_len = htonl (0);
927 GNUNET_SERVER_transmit_context_append_message (actx->tc,
928 (const struct GNUNET_MessageHeader *) atsm);
929 GNUNET_SERVER_transmit_context_run (actx->tc,
930 GNUNET_TIME_UNIT_FOREVER_REL);
931 GNUNET_CONTAINER_DLL_remove (a2s_head,
938 if (GNUNET_SYSERR == res)
940 /* address conversion failed, but there will be more callbacks */
941 atsm->res = htonl (GNUNET_SYSERR);
942 atsm->addr_len = htonl (0);
943 GNUNET_SERVER_transmit_context_append_message (actx->tc,
944 (const struct GNUNET_MessageHeader *) atsm);
949 GNUNET_assert (GNUNET_OK == res);
950 /* succesful conversion, append*/
951 slen = strlen (buf) + 1;
952 len = sizeof (struct AddressToStringResultMessage) + slen;
953 atsm = GNUNET_malloc (len);
954 atsm->header.size = ntohs (len);
955 atsm->header.type = ntohs (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
956 atsm->res = htonl (GNUNET_YES);
957 atsm->addr_len = htonl (slen);
961 GNUNET_SERVER_transmit_context_append_message (actx->tc,
962 (const struct GNUNET_MessageHeader *) atsm);
968 * Client asked to resolve an address. Process the request.
971 * @param client the client
972 * @param message the resolution request
975 clients_handle_address_to_string (void *cls,
976 struct GNUNET_SERVER_Client *client,
977 const struct GNUNET_MessageHeader *message)
979 const struct AddressLookupMessage *alum;
980 struct GNUNET_TRANSPORT_PluginFunctions *papi;
981 const char *plugin_name;
983 uint32_t address_len;
985 struct GNUNET_SERVER_TransmitContext *tc;
986 struct AddressToStringContext *actx;
987 struct AddressToStringResultMessage atsm;
988 struct GNUNET_TIME_Relative rtimeout;
991 size = ntohs (message->size);
992 if (size < sizeof (struct AddressLookupMessage))
995 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
998 alum = (const struct AddressLookupMessage *) message;
999 address_len = ntohs (alum->addrlen);
1000 if (size <= sizeof (struct AddressLookupMessage) + address_len)
1003 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1006 address = (const char *) &alum[1];
1007 plugin_name = (const char *) &address[address_len];
1008 if ('\0' != plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1])
1011 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1014 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
1015 numeric = ntohs (alum->numeric_only);
1016 tc = GNUNET_SERVER_transmit_context_create (client);
1017 papi = GST_plugins_printer_find (plugin_name);
1020 atsm.header.size = ntohs (sizeof (struct AddressToStringResultMessage));
1021 atsm.header.type = ntohs (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
1022 atsm.res = htonl (GNUNET_SYSERR);
1023 atsm.addr_len = htonl (0);
1024 GNUNET_SERVER_transmit_context_append_message (tc,
1026 atsm.header.size = ntohs (sizeof (struct AddressToStringResultMessage));
1027 atsm.header.type = ntohs (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY);
1028 atsm.res = htonl (GNUNET_OK);
1029 atsm.addr_len = htonl (0);
1030 GNUNET_SERVER_transmit_context_append_message (tc,
1032 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
1035 actx = GNUNET_new (struct AddressToStringContext);
1037 GNUNET_CONTAINER_DLL_insert (a2s_head, a2s_tail, actx);
1038 GNUNET_SERVER_disable_receive_done_warning (client);
1039 papi->address_pretty_printer (papi->cls,
1041 address, address_len,
1044 &transmit_address_to_client,
1050 * Compose #PeerIterateResponseMessage using the given peer and address.
1052 * @param peer identity of the peer
1053 * @param address the address, NULL on disconnect
1054 * @return composed message
1056 static struct PeerIterateResponseMessage *
1057 compose_address_iterate_response_message (const struct GNUNET_PeerIdentity *peer,
1058 const struct GNUNET_HELLO_Address *address)
1060 struct PeerIterateResponseMessage *msg;
1066 GNUNET_assert (NULL != peer);
1067 if (NULL != address)
1069 tlen = strlen (address->transport_name) + 1;
1070 alen = address->address_length;
1074 size = (sizeof (struct PeerIterateResponseMessage) + alen + tlen);
1075 msg = GNUNET_malloc (size);
1076 msg->header.size = htons (size);
1078 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_RESPONSE);
1079 msg->reserved = htonl (0);
1081 msg->addrlen = htonl (alen);
1082 msg->pluginlen = htonl (tlen);
1084 if (NULL != address)
1086 msg->local_address_info = htonl((uint32_t) address->local_info);
1087 addr = (char *) &msg[1];
1088 memcpy (addr, address->address, alen);
1089 memcpy (&addr[alen], address->transport_name, tlen);
1096 * Compose #PeerIterateResponseMessage using the given peer and address.
1098 * @param peer identity of the peer
1099 * @param address the address, NULL on disconnect
1100 * @return composed message
1102 static struct ValidationIterateResponseMessage *
1103 compose_validation_iterate_response_message (const struct GNUNET_PeerIdentity *peer,
1104 const struct GNUNET_HELLO_Address *address)
1106 struct ValidationIterateResponseMessage *msg;
1112 GNUNET_assert (NULL != peer);
1113 if (NULL != address)
1115 tlen = strlen (address->transport_name) + 1;
1116 alen = address->address_length;
1120 size = (sizeof (struct ValidationIterateResponseMessage) + alen + tlen);
1121 msg = GNUNET_malloc (size);
1122 msg->header.size = htons (size);
1124 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE);
1125 msg->reserved = htonl (0);
1127 msg->addrlen = htonl (alen);
1128 msg->pluginlen = htonl (tlen);
1130 if (NULL != address)
1132 msg->local_address_info = htonl((uint32_t) address->local_info);
1133 addr = (char *) &msg[1];
1134 memcpy (addr, address->address, alen);
1135 memcpy (&addr[alen], address->transport_name, tlen);
1142 * Context for #send_validation_information() and
1143 * #send_peer_information().
1145 struct IterationContext
1148 * Context to use for the transmission.
1150 struct GNUNET_SERVER_TransmitContext *tc;
1153 * Which peers do we care about?
1155 struct GNUNET_PeerIdentity id;
1158 * #GNUNET_YES if @e id should be ignored because we want all peers.
1165 * Output information of validation entries to the given client.
1167 * @param cls the `struct IterationContext *`
1168 * @param peer identity of the neighbour
1169 * @param address the address
1170 * @param last_validation point in time when last validation was performed
1171 * @param valid_until point in time how long address is valid
1172 * @param next_validation point in time when next validation will be performed
1173 * @param state state of validation notification
1176 send_validation_information (void *cls,
1177 const struct GNUNET_PeerIdentity *peer,
1178 const struct GNUNET_HELLO_Address *address,
1179 struct GNUNET_TIME_Absolute last_validation,
1180 struct GNUNET_TIME_Absolute valid_until,
1181 struct GNUNET_TIME_Absolute next_validation,
1182 enum GNUNET_TRANSPORT_ValidationState state)
1184 struct IterationContext *pc = cls;
1185 struct ValidationIterateResponseMessage *msg;
1187 if ( (GNUNET_YES == pc->all) ||
1188 (0 == memcmp (peer, &pc->id, sizeof (pc->id))) )
1190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1191 "Sending information about for validation entry for peer `%s' using address `%s'\n",
1192 GNUNET_i2s(peer), (address != NULL) ? GST_plugins_a2s (address) : "<none>");
1193 msg = compose_validation_iterate_response_message (peer, address);
1194 msg->last_validation = GNUNET_TIME_absolute_hton(last_validation);
1195 msg->valid_until = GNUNET_TIME_absolute_hton(valid_until);
1196 msg->next_validation = GNUNET_TIME_absolute_hton(next_validation);
1197 msg->state = htonl ((uint32_t) state);
1198 GNUNET_SERVER_transmit_context_append_message (pc->tc, &msg->header);
1205 * Output information of neighbours to the given client.
1207 * @param cls the `struct PeerIterationContext *`
1208 * @param peer identity of the neighbour
1209 * @param address the address
1210 * @param state current state this peer is in
1211 * @param state_timeout timeout for the current state of the peer
1212 * @param bandwidth_in inbound quota in NBO
1213 * @param bandwidth_out outbound quota in NBO
1216 send_peer_information (void *cls,
1217 const struct GNUNET_PeerIdentity *peer,
1218 const struct GNUNET_HELLO_Address *address,
1219 enum GNUNET_TRANSPORT_PeerState state,
1220 struct GNUNET_TIME_Absolute state_timeout,
1221 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1222 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
1224 struct IterationContext *pc = cls;
1225 struct PeerIterateResponseMessage *msg;
1227 if ( (GNUNET_YES == pc->all) ||
1228 (0 == memcmp (peer, &pc->id, sizeof (pc->id))) )
1230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1231 "Sending information about `%s' using address `%s' in state `%s'\n",
1233 (address != NULL) ? GST_plugins_a2s (address) : "<none>",
1234 GNUNET_TRANSPORT_ps2s (state));
1235 msg = compose_address_iterate_response_message (peer, address);
1236 msg->state = htonl (state);
1237 msg->state_timeout = GNUNET_TIME_absolute_hton(state_timeout);
1238 GNUNET_SERVER_transmit_context_append_message (pc->tc, &msg->header);
1245 * Client asked to obtain information about a specific or all peers
1246 * Process the request.
1249 * @param client the client
1250 * @param message the peer address information request
1253 clients_handle_monitor_peers (void *cls,
1254 struct GNUNET_SERVER_Client *client,
1255 const struct GNUNET_MessageHeader *message)
1257 static struct GNUNET_PeerIdentity all_zeros;
1258 struct GNUNET_SERVER_TransmitContext *tc;
1259 const struct PeerMonitorMessage *msg;
1260 struct IterationContext pc;
1262 msg = (const struct PeerMonitorMessage *) message;
1263 if ( (GNUNET_YES != ntohl (msg->one_shot)) &&
1264 (NULL != lookup_monitoring_client (peer_monitoring_clients_head, client)) )
1266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
1267 "ServerClient %p tried to start monitoring twice\n",
1270 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1273 GNUNET_SERVER_disable_receive_done_warning (client);
1274 GNUNET_SERVER_client_mark_monitor (client);
1275 pc.tc = tc = GNUNET_SERVER_transmit_context_create (client);
1277 /* Send initial list */
1278 if (0 == memcmp (&msg->peer, &all_zeros, sizeof (struct GNUNET_PeerIdentity)))
1280 /* iterate over all neighbours */
1281 pc.all = GNUNET_YES;
1286 /* just return one neighbour */
1290 GST_neighbours_iterate (&send_peer_information, &pc);
1292 if (GNUNET_YES != ntohl (msg->one_shot))
1294 setup_peer_monitoring_client (client, &msg->peer);
1298 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
1299 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_RESPONSE);
1302 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
1307 * Client asked to obtain information about a specific or all validation
1311 * @param client the client
1312 * @param message the peer address information request
1315 clients_handle_monitor_validation (void *cls,
1316 struct GNUNET_SERVER_Client *client,
1317 const struct GNUNET_MessageHeader *message)
1319 static struct GNUNET_PeerIdentity all_zeros;
1320 struct GNUNET_SERVER_TransmitContext *tc;
1321 struct PeerMonitorMessage *msg;
1322 struct IterationContext pc;
1324 if (ntohs (message->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_REQUEST)
1327 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1330 if (ntohs (message->size) != sizeof (struct ValidationMonitorMessage))
1333 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1336 msg = (struct PeerMonitorMessage *) message;
1337 if ( (GNUNET_YES != ntohl (msg->one_shot)) &&
1338 (NULL != lookup_monitoring_client (val_monitoring_clients_head, client)) )
1340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
1341 "ServerClient %p tried to start monitoring twice\n",
1344 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1347 GNUNET_SERVER_disable_receive_done_warning (client);
1348 GNUNET_SERVER_client_mark_monitor (client);
1349 pc.tc = tc = GNUNET_SERVER_transmit_context_create (client);
1351 /* Send initial list */
1352 if (0 == memcmp (&msg->peer, &all_zeros, sizeof (struct GNUNET_PeerIdentity)))
1354 /* iterate over all neighbours */
1355 pc.all = GNUNET_YES;
1360 /* just return one neighbour */
1365 GST_validation_iterate (&send_validation_information, &pc);
1367 if (GNUNET_YES != ntohl (msg->one_shot))
1369 setup_val_monitoring_client (client, &msg->peer);
1373 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
1374 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE);
1376 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
1381 * Function called by the plugin with information about the
1382 * current sessions managed by the plugin (for monitoring).
1384 * @param cls closure
1385 * @param session session handle this information is about,
1386 * NULL to indicate that we are "in sync" (initial
1387 * iteration complete)
1388 * @param info information about the state of the session,
1389 * NULL if @a session is also NULL and we are
1390 * merely signalling that the initial iteration is over
1393 plugin_session_info_cb (void *cls,
1394 struct Session *session,
1395 const struct GNUNET_TRANSPORT_SessionInfo *info)
1397 struct TransportPluginMonitorMessage *msg;
1398 struct GNUNET_MessageHeader sync;
1405 if (0 == GNUNET_SERVER_notification_context_get_size (plugin_nc))
1407 fprintf (stderr, "UNSUB!\n");
1408 GST_plugins_monitor_subscribe (NULL, NULL);
1411 if ( (NULL == info) &&
1414 /* end of initial iteration */
1415 if (NULL != sync_client)
1417 sync.size = htons (sizeof (struct GNUNET_MessageHeader));
1418 sync.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PLUGIN_SYNC);
1419 GNUNET_SERVER_notification_context_unicast (plugin_nc,
1427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1428 "Plugin event for peer %s on transport %s\n",
1429 GNUNET_i2s (&info->address->peer),
1430 info->address->transport_name);
1431 slen = strlen (info->address->transport_name) + 1;
1432 alen = info->address->address_length;
1433 size = sizeof (struct TransportPluginMonitorMessage) + slen + alen;
1434 if (size > UINT16_MAX)
1439 msg = GNUNET_malloc (size);
1440 msg->header.size = htons (size);
1441 msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PLUGIN_EVENT);
1442 msg->session_state = htons ((uint16_t) info->state);
1443 msg->is_inbound = htons ((int16_t) info->is_inbound);
1444 msg->msgs_pending = htonl (info->num_msg_pending);
1445 msg->bytes_pending = htonl (info->num_bytes_pending);
1446 msg->timeout = GNUNET_TIME_absolute_hton (info->session_timeout);
1447 msg->delay = GNUNET_TIME_absolute_hton (info->receive_delay);
1448 msg->peer = info->address->peer;
1449 msg->session_id = (uint64_t) (intptr_t) session;
1450 msg->plugin_name_len = htons (slen);
1451 msg->plugin_address_len = htons (alen);
1452 name = (char *) &msg[1];
1453 memcpy (name, info->address->transport_name, slen);
1454 addr = &name[slen + 1];
1455 memcpy (addr, info->address->address, alen);
1456 if (NULL != sync_client)
1457 GNUNET_SERVER_notification_context_unicast (plugin_nc,
1462 GNUNET_SERVER_notification_context_broadcast (plugin_nc,
1470 * Client asked to obtain information about all plugin connections.
1473 * @param client the client
1474 * @param message the peer address information request
1477 clients_handle_monitor_plugins (void *cls,
1478 struct GNUNET_SERVER_Client *client,
1479 const struct GNUNET_MessageHeader *message)
1481 GNUNET_SERVER_client_mark_monitor (client);
1482 GNUNET_SERVER_disable_receive_done_warning (client);
1483 GNUNET_SERVER_notification_context_add (plugin_nc, client);
1484 sync_client = client;
1485 GST_plugins_monitor_subscribe (&plugin_session_info_cb, NULL);
1490 * Start handling requests from clients.
1492 * @param server server used to accept clients from.
1495 GST_clients_start (struct GNUNET_SERVER_Handle *server)
1497 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1498 {&clients_handle_start, NULL,
1499 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
1500 {&clients_handle_hello, NULL,
1501 GNUNET_MESSAGE_TYPE_HELLO, 0},
1502 {&clients_handle_send, NULL,
1503 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
1504 {&clients_handle_request_connect, NULL,
1505 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
1506 sizeof (struct TransportRequestConnectMessage)},
1507 {&clients_handle_address_to_string, NULL,
1508 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING, 0},
1509 {&clients_handle_monitor_peers, NULL,
1510 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PEER_REQUEST,
1511 sizeof (struct PeerMonitorMessage)},
1512 {&clients_handle_monitor_validation, NULL,
1513 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_REQUEST,
1514 sizeof (struct ValidationMonitorMessage)},
1515 {&GST_blacklist_handle_init, NULL,
1516 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
1517 sizeof (struct GNUNET_MessageHeader)},
1518 {&GST_blacklist_handle_reply, NULL,
1519 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
1520 sizeof (struct BlacklistMessage)},
1521 {&GST_manipulation_set_metric, NULL,
1522 GNUNET_MESSAGE_TYPE_TRANSPORT_TRAFFIC_METRIC, 0},
1523 {&clients_handle_monitor_plugins, NULL,
1524 GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_PLUGIN_START,
1525 sizeof (struct GNUNET_MessageHeader) },
1528 peer_nc = GNUNET_SERVER_notification_context_create (server, 0);
1529 val_nc = GNUNET_SERVER_notification_context_create (server, 0);
1530 plugin_nc = GNUNET_SERVER_notification_context_create (server, 0);
1531 GNUNET_SERVER_add_handlers (server, handlers);
1532 GNUNET_SERVER_disconnect_notify (server,
1533 &client_disconnect_notification,
1539 * Stop processing clients.
1544 struct AddressToStringContext *cur;
1546 while (NULL != (cur = a2s_head))
1548 GNUNET_SERVER_transmit_context_destroy (cur->tc, GNUNET_NO);
1549 GNUNET_CONTAINER_DLL_remove (a2s_head, a2s_tail, cur);
1552 if (NULL != peer_nc)
1554 GNUNET_SERVER_notification_context_destroy (peer_nc);
1559 GNUNET_SERVER_notification_context_destroy (val_nc);
1562 if (NULL != plugin_nc)
1564 GNUNET_SERVER_notification_context_destroy (plugin_nc);
1571 * Broadcast the given message to all of our clients.
1573 * @param msg message to broadcast
1574 * @param may_drop #GNUNET_YES if the message can be dropped / is payload
1577 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg,
1580 struct TransportClient *tc;
1582 for (tc = clients_head; NULL != tc; tc = tc->next)
1584 if ((GNUNET_YES == may_drop) && (GNUNET_YES != tc->send_payload))
1585 continue; /* skip, this client does not care about payload */
1586 unicast (tc, msg, may_drop);
1592 * Send the given message to a particular client
1594 * @param client target of the message
1595 * @param msg message to transmit
1596 * @param may_drop #GNUNET_YES if the message can be dropped
1599 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
1600 const struct GNUNET_MessageHeader *msg,
1603 struct TransportClient *tc;
1605 tc = lookup_client (client);
1607 return; /* client got disconnected in the meantime, drop message */
1608 unicast (tc, msg, may_drop);
1613 * Broadcast the new active address to all clients monitoring the peer.
1615 * @param peer peer this update is about (never NULL)
1616 * @param address address, NULL on disconnect
1617 * @param state the current state of the peer
1618 * @param state_timeout the time out for the state
1621 GST_clients_broadcast_peer_notification (const struct GNUNET_PeerIdentity *peer,
1622 const struct GNUNET_HELLO_Address *address,
1623 enum GNUNET_TRANSPORT_PeerState state,
1624 struct GNUNET_TIME_Absolute state_timeout)
1626 static struct GNUNET_PeerIdentity all_zeros;
1627 struct PeerIterateResponseMessage *msg;
1628 struct MonitoringClient *mc;
1630 msg = compose_address_iterate_response_message (peer, address);
1631 msg->state = htonl (state);
1632 msg->state_timeout = GNUNET_TIME_absolute_hton (state_timeout);
1633 mc = peer_monitoring_clients_head;
1636 if ((0 == memcmp (&mc->peer, &all_zeros,
1637 sizeof (struct GNUNET_PeerIdentity))) ||
1638 (0 == memcmp (&mc->peer, peer,
1639 sizeof (struct GNUNET_PeerIdentity))))
1641 GNUNET_SERVER_notification_context_unicast (peer_nc, mc->client,
1642 &msg->header, GNUNET_NO);
1651 * Broadcast the new validation changes to all clients monitoring the peer.
1653 * @param peer peer this update is about (never NULL)
1654 * @param address address, NULL on disconnect
1655 * @param last_validation point in time when last validation was performed
1656 * @param valid_until point in time how long address is valid
1657 * @param next_validation point in time when next validation will be performed
1658 * @param state state of validation notification
1661 GST_clients_broadcast_validation_notification (const struct GNUNET_PeerIdentity *peer,
1662 const struct GNUNET_HELLO_Address *address,
1663 struct GNUNET_TIME_Absolute last_validation,
1664 struct GNUNET_TIME_Absolute valid_until,
1665 struct GNUNET_TIME_Absolute next_validation,
1666 enum GNUNET_TRANSPORT_ValidationState state)
1668 struct ValidationIterateResponseMessage *msg;
1669 struct MonitoringClient *mc;
1670 static struct GNUNET_PeerIdentity all_zeros;
1672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1673 "Sending information about for validation entry for peer `%s' using address `%s'\n",
1674 GNUNET_i2s(peer), (address != NULL) ? GST_plugins_a2s (address) : "<none>");
1676 msg = compose_validation_iterate_response_message (peer, address);
1677 msg->last_validation = GNUNET_TIME_absolute_hton(last_validation);
1678 msg->valid_until = GNUNET_TIME_absolute_hton(valid_until);
1679 msg->next_validation = GNUNET_TIME_absolute_hton(next_validation);
1680 msg->state = htonl ((uint32_t) state);
1681 mc = val_monitoring_clients_head;
1684 if ((0 == memcmp (&mc->peer, &all_zeros,
1685 sizeof (struct GNUNET_PeerIdentity))) ||
1686 (0 == memcmp (&mc->peer, peer,
1687 sizeof (struct GNUNET_PeerIdentity))))
1689 GNUNET_SERVER_notification_context_unicast (val_nc, mc->client,
1690 &msg->header, GNUNET_NO);
1699 /* end of file gnunet-service-transport_clients.c */