2 This file is part of GNUnet.
3 (C) 2010,2011 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.h"
34 #include "transport.h"
37 * How many messages can we have pending for a given client process
38 * before we start to drop incoming messages? We typically should
39 * have only one client and so this would be the primary buffer for
40 * messages, so the number should be chosen rather generously.
42 * The expectation here is that most of the time the queue is large
43 * enough so that a drop is virtually never required. Note that
44 * this value must be about as large as 'TOTAL_MSGS' in the
45 * 'test_transport_api_reliability.c', otherwise that testcase may
48 #define MAX_PENDING (128 * 1024)
52 * Linked list of messages to be transmitted to the client. Each
53 * entry is followed by the actual message.
55 struct ClientMessageQueueEntry
58 * This is a doubly-linked list.
60 struct ClientMessageQueueEntry *next;
63 * This is a doubly-linked list.
65 struct ClientMessageQueueEntry *prev;
70 * Client connected to the transport service.
72 struct TransportClient
76 * This is a doubly-linked list.
78 struct TransportClient *next;
81 * This is a doubly-linked list.
83 struct TransportClient *prev;
86 * Handle to the client.
88 struct GNUNET_SERVER_Client *client;
91 * Linked list of messages yet to be transmitted to
94 struct ClientMessageQueueEntry *message_queue_head;
97 * Tail of linked list of messages yet to be transmitted to the
100 struct ClientMessageQueueEntry *message_queue_tail;
103 * Current transmit request handle.
105 struct GNUNET_CONNECTION_TransmitHandle *th;
108 * Length of the list of messages pending for this client.
110 unsigned int message_count;
116 * Head of linked list of all clients to this service.
118 static struct TransportClient *clients_head;
121 * Tail of linked list of all clients to this service.
123 static struct TransportClient *clients_tail;
127 * Find the internal handle associated with the given client handle
129 * @param client server's client handle to look up
130 * @return internal client handle
132 static struct TransportClient *
133 lookup_client (struct GNUNET_SERVER_Client *client)
135 struct TransportClient *tc;
140 if (tc->client == client)
149 * Create the internal handle for the given server client handle
151 * @param client server's client handle to create our internal handle for
152 * @return fresh internal client handle
154 static struct TransportClient *
155 setup_client (struct GNUNET_SERVER_Client *client)
157 struct TransportClient *tc;
159 tc = GNUNET_malloc (sizeof (struct TransportClient));
161 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, tc);
167 * Function called to notify a client about the socket being ready to
168 * queue more data. "buf" will be NULL and "size" zero if the socket
169 * was closed for writing in the meantime.
172 * @param size number of bytes available in buf
173 * @param buf where the callee should write the message
174 * @return number of bytes written to buf
177 transmit_to_client_callback (void *cls, size_t size, void *buf)
179 struct TransportClient *tc = cls;
180 struct ClientMessageQueueEntry *q;
181 const struct GNUNET_MessageHeader *msg;
190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
191 "Transmission to client failed, closing connection.\n");
197 while (NULL != (q = tc->message_queue_head))
199 msg = (const struct GNUNET_MessageHeader *) &q[1];
200 msize = ntohs (msg->size);
201 if (msize + tsize > size)
204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
205 "Transmitting message of type %u to client.\n",
208 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head,
209 tc->message_queue_tail, q);
211 memcpy (&cbuf[tsize], msg, msize);
217 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
218 tc->th = GNUNET_SERVER_notify_transmit_ready (tc->client,
220 GNUNET_TIME_UNIT_FOREVER_REL,
221 &transmit_to_client_callback,
223 GNUNET_assert (tc->th != NULL);
230 * Queue the given message for transmission to the given client
232 * @param client target of the message
233 * @param msg message to transmit
234 * @param may_drop GNUNET_YES if the message can be dropped
237 unicast (struct TransportClient *tc,
238 const struct GNUNET_MessageHeader *msg, int may_drop)
240 struct ClientMessageQueueEntry *q;
243 if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
245 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
247 ("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
248 ntohs (msg->type), ntohs (msg->size), tc->message_count,
250 GNUNET_STATISTICS_update (GST_stats,
252 ("# messages dropped due to slow client"), 1,
256 msize = ntohs (msg->size);
257 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
258 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
259 memcpy (&q[1], msg, msize);
260 GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
261 tc->message_queue_tail, q);
265 tc->th = GNUNET_SERVER_notify_transmit_ready (tc->client,
267 GNUNET_TIME_UNIT_FOREVER_REL,
268 &transmit_to_client_callback,
270 GNUNET_assert (tc->th != NULL);
275 * Called whenever a client is disconnected. Frees our
276 * resources associated with that client.
279 * @param client identification of the client
282 client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
284 struct TransportClient *tc;
285 struct ClientMessageQueueEntry *mqe;
289 tc = lookup_client (client);
293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
294 "Client disconnected, cleaning up.\n");
296 while (NULL != (mqe = tc->message_queue_head))
298 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head,
299 tc->message_queue_tail, mqe);
303 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
306 GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
309 GNUNET_break (0 == tc->message_count);
315 * Function called for each of our connected neighbours. Notify the
316 * client about the existing neighbour.
318 * @param cls the 'struct TransportClient' to notify
319 * @param peer identity of the neighbour
320 * @param ats performance data
321 * @param ats_count number of entries in ats (excluding 0-termination)
324 notify_client_about_neighbour (void *cls,
325 const struct GNUNET_PeerIdentity *peer,
326 const struct GNUNET_TRANSPORT_ATS_Information
327 *ats, uint32_t ats_count)
329 struct TransportClient *tc = cls;
330 struct ConnectInfoMessage *cim;
334 sizeof (struct ConnectInfoMessage) +
335 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
336 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
337 cim = GNUNET_malloc (size);
338 cim->header.size = htons (size);
339 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
340 cim->ats_count = htonl (ats_count);
343 ats, ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
344 unicast (tc, &cim->header, GNUNET_NO);
350 * Initialize a normal client. We got a start message from this
351 * client, add him to the list of clients for broadcasting of inbound
355 * @param client the client
356 * @param message the start message that was sent
359 clients_handle_start (void *cls,
360 struct GNUNET_SERVER_Client *client,
361 const struct GNUNET_MessageHeader *message)
363 const struct StartMessage *start;
364 struct TransportClient *tc;
366 tc = lookup_client (client);
369 /* got 'start' twice from the same client, not allowed */
371 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
374 start = (const struct StartMessage *) message;
375 if ((GNUNET_NO != ntohl (start->do_check)) &&
376 (0 != memcmp (&start->self,
377 &GST_my_identity, sizeof (struct GNUNET_PeerIdentity))))
379 /* client thinks this is a different peer, reject */
380 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
382 ("Rejecting control connection from peer `%s', which is not me!\n"),
383 GNUNET_i2s (&start->self));
384 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
387 tc = setup_client (client);
388 unicast (tc, GST_hello_get (), GNUNET_NO);
389 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
390 GNUNET_SERVER_receive_done (client, GNUNET_OK);
395 * Client sent us a HELLO. Process the request.
398 * @param client the client
399 * @param message the HELLO message
402 clients_handle_hello (void *cls,
403 struct GNUNET_SERVER_Client *client,
404 const struct GNUNET_MessageHeader *message)
406 GST_validation_handle_hello (message);
407 GNUNET_SERVER_receive_done (client, GNUNET_OK);
412 * Closure for 'handle_send_transmit_continuation'
414 struct SendTransmitContinuationContext
417 * Client that made the request.
419 struct GNUNET_SERVER_Client *client;
422 * Peer that was the target.
424 struct GNUNET_PeerIdentity target;
429 * Function called after the transmission is done. Notify the client that it is
430 * OK to send the next message.
433 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
436 handle_send_transmit_continuation (void *cls, int success)
438 struct SendTransmitContinuationContext *stcc = cls;
439 struct SendOkMessage send_ok_msg;
441 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
442 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
443 send_ok_msg.success = htonl (success);
444 send_ok_msg.latency =
445 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
446 send_ok_msg.peer = stcc->target;
447 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
448 GNUNET_SERVER_client_drop (stcc->client);
454 * Client asked for transmission to a peer. Process the request.
457 * @param client the client
458 * @param message the send message that was sent
461 clients_handle_send (void *cls,
462 struct GNUNET_SERVER_Client *client,
463 const struct GNUNET_MessageHeader *message)
465 const struct OutboundMessage *obm;
466 const struct GNUNET_MessageHeader *obmm;
467 struct SendTransmitContinuationContext *stcc;
471 size = ntohs (message->size);
473 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
476 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
479 obm = (const struct OutboundMessage *) message;
480 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
481 msize = size - sizeof (struct OutboundMessage);
482 if (msize < sizeof (struct GNUNET_MessageHeader))
485 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
488 GNUNET_STATISTICS_update (GST_stats,
490 ("# bytes payload received for other peers"), msize,
493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
494 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
495 "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
497 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
499 /* not connected, not allowed to send; can happen due to asynchronous operations */
500 GNUNET_STATISTICS_update (GST_stats,
502 ("# bytes payload dropped (other peer was not connected)"),
504 GNUNET_SERVER_receive_done (client, GNUNET_OK);
507 GNUNET_SERVER_receive_done (client, GNUNET_OK);
508 stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
509 stcc->target = obm->peer;
510 stcc->client = client;
511 GNUNET_SERVER_client_keep (client);
512 GST_neighbours_send (&obm->peer,
514 GNUNET_TIME_relative_ntoh (obm->timeout),
515 &handle_send_transmit_continuation, stcc);
520 * Try to initiate a connection to the given peer if the blacklist
523 * @param cls closure (unused, NULL)
524 * @param peer identity of peer that was tested
525 * @param result GNUNET_OK if the connection is allowed,
529 try_connect_if_allowed (void *cls,
530 const struct GNUNET_PeerIdentity *peer, int result)
532 if (GNUNET_OK != result)
533 return; /* not allowed */
534 GST_neighbours_try_connect (peer);
539 * Handle request connect message
541 * @param cls closure (always NULL)
542 * @param client identification of the client
543 * @param message the actual message
546 clients_handle_request_connect (void *cls,
547 struct GNUNET_SERVER_Client *client,
548 const struct GNUNET_MessageHeader *message)
550 const struct TransportRequestConnectMessage *trcm =
551 (const struct TransportRequestConnectMessage *) message;
553 GNUNET_STATISTICS_update (GST_stats,
555 ("# REQUEST CONNECT messages received"), 1,
558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
559 "Received a request connect message for peer `%s'\n",
560 GNUNET_i2s (&trcm->peer));
562 (void) GST_blacklist_test_allowed (&trcm->peer, NULL,
563 &try_connect_if_allowed, NULL);
564 GNUNET_SERVER_receive_done (client, GNUNET_OK);
569 * Client asked for a quota change for a particular peer. Process the request.
572 * @param client the client
573 * @param message the quota changing message
576 clients_handle_set_quota (void *cls,
577 struct GNUNET_SERVER_Client *client,
578 const struct GNUNET_MessageHeader *message)
580 const struct QuotaSetMessage *qsm;
582 qsm = (const struct QuotaSetMessage *) message;
583 GNUNET_STATISTICS_update (GST_stats,
584 gettext_noop ("# SET QUOTA messages received"),
587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
588 "Received `%s' request (new quota %u) from client for peer `%4s'\n",
590 (unsigned int) ntohl (qsm->quota.value__),
591 GNUNET_i2s (&qsm->peer));
593 GST_neighbours_set_incoming_quota (&qsm->peer, qsm->quota);
594 GNUNET_SERVER_receive_done (client, GNUNET_OK);
599 * Take the given address and append it to the set of results sent back to
602 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
603 * @param address the resolved name, NULL to indicate the last response
606 transmit_address_to_client (void *cls, const char *address)
608 struct GNUNET_SERVER_TransmitContext *tc = cls;
612 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
613 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
614 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
617 GNUNET_SERVER_transmit_context_append_data (tc,
618 address, strlen (address) + 1,
619 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
624 * Client asked to resolve an address. Process the request.
627 * @param client the client
628 * @param message the resolution request
631 clients_handle_address_lookup (void *cls,
632 struct GNUNET_SERVER_Client *client,
633 const struct GNUNET_MessageHeader *message)
635 const struct AddressLookupMessage *alum;
636 struct GNUNET_TRANSPORT_PluginFunctions *papi;
637 const char *plugin_name;
639 uint32_t address_len;
641 struct GNUNET_SERVER_TransmitContext *tc;
642 struct GNUNET_TIME_Relative rtimeout;
645 size = ntohs (message->size);
646 if (size < sizeof (struct AddressLookupMessage))
649 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
652 alum = (const struct AddressLookupMessage *) message;
653 address_len = ntohl (alum->addrlen);
654 if (size <= sizeof (struct AddressLookupMessage) + address_len)
657 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
660 address = (const char *) &alum[1];
661 plugin_name = (const char *) &address[address_len];
663 [size - sizeof (struct AddressLookupMessage) - address_len - 1] != '\0')
666 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
669 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
670 numeric = ntohl (alum->numeric_only);
671 tc = GNUNET_SERVER_transmit_context_create (client);
672 papi = GST_plugins_find (plugin_name);
675 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
676 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
677 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
680 GNUNET_SERVER_disable_receive_done_warning (client);
681 papi->address_pretty_printer (papi->cls,
683 address, address_len,
685 rtimeout, &transmit_address_to_client, tc);
690 * Send an address to the client.
692 * @param cls our 'struct GNUNET_SERVER_TransmitContext' (for sending)
693 * @param public_key public key for the peer, never NULL
694 * @param target peer this change is about, never NULL
695 * @param valid_until until what time do we consider the address valid?
696 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
697 * is ZERO if the address is considered valid (no validation needed)
698 * is a time in the future if we're currently denying re-validation
699 * @param plugin_name name of the plugin
700 * @param plugin_address binary address
701 * @param plugin_address_len length of address
704 send_address_to_client (void *cls,
705 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
706 *public_key, const struct GNUNET_PeerIdentity *target,
707 struct GNUNET_TIME_Absolute valid_until,
708 struct GNUNET_TIME_Absolute validation_block,
709 const char *plugin_name, const void *plugin_address,
710 size_t plugin_address_len)
712 struct GNUNET_SERVER_TransmitContext *tc = cls;
715 /* FIXME: move to a binary format!!! */
716 GNUNET_asprintf (&addr_buf, "%s --- %s, %s",
717 GST_plugins_a2s (plugin_name,
720 (GNUNET_YES == GST_neighbours_test_connected (target))
723 (GNUNET_TIME_absolute_get_remaining (valid_until).rel_value >
724 0) ? "VALIDATED" : "UNVALIDATED");
725 transmit_address_to_client (tc, addr_buf);
726 GNUNET_free (addr_buf);
731 * Client asked to obtain information about a peer's addresses.
732 * Process the request.
733 * FIXME: use better name!
736 * @param client the client
737 * @param message the peer address information request
740 clients_handle_peer_address_lookup (void *cls,
741 struct GNUNET_SERVER_Client *client,
742 const struct GNUNET_MessageHeader *message)
744 const struct PeerAddressLookupMessage *peer_address_lookup;
745 struct GNUNET_SERVER_TransmitContext *tc;
747 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
748 GNUNET_break (ntohl (peer_address_lookup->reserved) == 0);
749 tc = GNUNET_SERVER_transmit_context_create (client);
750 GST_validation_get_addresses (&peer_address_lookup->peer,
751 &send_address_to_client, tc);
752 GNUNET_SERVER_transmit_context_append_data (tc,
754 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
755 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
760 * Output the active address of connected neighbours to the given client.
762 * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
763 * @param neighbour identity of the neighbour
764 * @param ats performance data
765 * @param ats_count number of entries in ats (excluding 0-termination)
768 output_addresses (void *cls,
769 const struct GNUNET_PeerIdentity *neighbour,
770 const struct GNUNET_TRANSPORT_ATS_Information *ats,
773 struct GNUNET_SERVER_TransmitContext *tc = cls;
776 /* FIXME: move to a binary format!!! */
777 GNUNET_asprintf (&addr_buf,
779 GNUNET_i2s (neighbour), GST_plugins_a2s ("FIXME", NULL, 0));
780 transmit_address_to_client (tc, addr_buf);
781 GNUNET_free (addr_buf);
786 * Client asked to obtain information about all actively used addresses.
787 * Process the request. FIXME: use better name!
790 * @param client the client
791 * @param message the peer address information request
794 clients_handle_address_iterate (void *cls,
795 struct GNUNET_SERVER_Client *client,
796 const struct GNUNET_MessageHeader *message)
798 struct GNUNET_SERVER_TransmitContext *tc;
800 GNUNET_SERVER_disable_receive_done_warning (client);
801 tc = GNUNET_SERVER_transmit_context_create (client);
802 GST_neighbours_iterate (&output_addresses, tc);
803 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
804 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
805 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
810 * Start handling requests from clients.
812 * @param server server used to accept clients from.
815 GST_clients_start (struct GNUNET_SERVER_Handle *server)
817 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
818 {&clients_handle_start, NULL,
819 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
820 {&clients_handle_hello, NULL,
821 GNUNET_MESSAGE_TYPE_HELLO, 0},
822 {&clients_handle_send, NULL,
823 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
824 {&clients_handle_request_connect, NULL,
825 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
826 sizeof (struct TransportRequestConnectMessage)},
827 {&clients_handle_set_quota, NULL,
828 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
829 {&clients_handle_address_lookup, NULL,
830 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP, 0},
831 {&clients_handle_peer_address_lookup, NULL,
832 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
833 sizeof (struct PeerAddressLookupMessage)},
834 {&clients_handle_address_iterate, NULL,
835 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
836 sizeof (struct GNUNET_MessageHeader)},
837 {&GST_blacklist_handle_init, NULL,
838 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
839 sizeof (struct GNUNET_MessageHeader)},
840 {&GST_blacklist_handle_reply, NULL,
841 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
842 sizeof (struct BlacklistMessage)},
845 GNUNET_SERVER_add_handlers (server, handlers);
846 GNUNET_SERVER_disconnect_notify (server,
847 &client_disconnect_notification, NULL);
852 * Stop processing clients.
862 * Broadcast the given message to all of our clients.
864 * @param msg message to broadcast
865 * @param may_drop GNUNET_YES if the message can be dropped
868 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
870 struct TransportClient *tc;
872 for (tc = clients_head; tc != NULL; tc = tc->next)
873 unicast (tc, msg, may_drop);
878 * Send the given message to a particular client
880 * @param client target of the message
881 * @param msg message to transmit
882 * @param may_drop GNUNET_YES if the message can be dropped
885 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
886 const struct GNUNET_MessageHeader *msg, int may_drop)
888 struct TransportClient *tc;
890 tc = lookup_client (client);
892 tc = setup_client (client);
893 unicast (tc, msg, may_drop);
897 /* end of file gnunet-service-transport_clients.c */