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;
115 * Head of linked list of all clients to this service.
117 static struct TransportClient *clients_head;
120 * Tail of linked list of all clients to this service.
122 static struct TransportClient *clients_tail;
125 * Find the internal handle associated with the given client handle
127 * @param client server's client handle to look up
128 * @return internal client handle
130 static struct TransportClient *
131 lookup_client (struct GNUNET_SERVER_Client *client)
133 struct TransportClient *tc;
138 if (tc->client == client)
147 * Create the internal handle for the given server client handle
149 * @param client server's client handle to create our internal handle for
150 * @return fresh internal client handle
152 static struct TransportClient *
153 setup_client (struct GNUNET_SERVER_Client *client)
155 struct TransportClient *tc;
157 GNUNET_assert (lookup_client (client) == NULL);
158 tc = GNUNET_malloc (sizeof (struct TransportClient));
160 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, tc);
163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
164 "Client %X connected\n", tc);
171 * Function called to notify a client about the socket being ready to
172 * queue more data. "buf" will be NULL and "size" zero if the socket
173 * was closed for writing in the meantime.
176 * @param size number of bytes available in buf
177 * @param buf where the callee should write the message
178 * @return number of bytes written to buf
181 transmit_to_client_callback (void *cls, size_t size, void *buf)
183 struct TransportClient *tc = cls;
184 struct ClientMessageQueueEntry *q;
185 const struct GNUNET_MessageHeader *msg;
194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
195 "Transmission to client failed, closing connection.\n");
201 while (NULL != (q = tc->message_queue_head))
203 msg = (const struct GNUNET_MessageHeader *) &q[1];
204 msize = ntohs (msg->size);
205 if (msize + tsize > size)
208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
209 "Transmitting message of type %u to client %X.\n",
210 ntohs (msg->type), tc);
212 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
215 memcpy (&cbuf[tsize], msg, msize);
221 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
223 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
224 GNUNET_TIME_UNIT_FOREVER_REL,
225 &transmit_to_client_callback, tc);
226 GNUNET_assert (tc->th != NULL);
233 * Queue the given message for transmission to the given client
235 * @param tc target of the message
236 * @param msg message to transmit
237 * @param may_drop GNUNET_YES if the message can be dropped
240 unicast (struct TransportClient *tc, const struct GNUNET_MessageHeader *msg,
243 struct ClientMessageQueueEntry *q;
246 if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
248 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
250 ("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
251 ntohs (msg->type), ntohs (msg->size), tc->message_count,
253 GNUNET_STATISTICS_update (GST_stats,
255 ("# messages dropped due to slow client"), 1,
259 msize = ntohs (msg->size);
260 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
261 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
262 memcpy (&q[1], msg, msize);
263 GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
264 tc->message_queue_tail, q);
269 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
270 GNUNET_TIME_UNIT_FOREVER_REL,
271 &transmit_to_client_callback, tc);
272 GNUNET_assert (tc->th != NULL);
277 * Called whenever a client is disconnected. Frees our
278 * resources associated with that client.
281 * @param client identification of the client
284 client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
286 struct TransportClient *tc;
287 struct ClientMessageQueueEntry *mqe;
291 tc = lookup_client (client);
295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
296 "Client %X disconnected, cleaning up.\n", tc);
298 while (NULL != (mqe = tc->message_queue_head))
300 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
305 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
308 GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
311 GNUNET_break (0 == tc->message_count);
317 * Function called for each of our connected neighbours. Notify the
318 * client about the existing neighbour.
320 * @param cls the 'struct TransportClient' to notify
321 * @param peer identity of the neighbour
322 * @param ats performance data
323 * @param ats_count number of entries in ats (excluding 0-termination)
324 * @param transport plugin
325 * @param addr address
326 * @param addrlen address length
329 notify_client_about_neighbour (void *cls,
330 const struct GNUNET_PeerIdentity *peer,
331 const struct GNUNET_ATS_Information
332 *ats, uint32_t ats_count,
333 const char * transport,
337 struct TransportClient *tc = cls;
338 struct ConnectInfoMessage *cim;
342 sizeof (struct ConnectInfoMessage) +
343 ats_count * sizeof (struct GNUNET_ATS_Information);
344 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
345 cim = GNUNET_malloc (size);
346 cim->header.size = htons (size);
347 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
348 cim->ats_count = htonl (ats_count);
350 memcpy (&cim->ats, ats,
351 ats_count * sizeof (struct GNUNET_ATS_Information));
352 unicast (tc, &cim->header, GNUNET_NO);
358 * Initialize a normal client. We got a start message from this
359 * client, add him to the list of clients for broadcasting of inbound
363 * @param client the client
364 * @param message the start message that was sent
367 clients_handle_start (void *cls, struct GNUNET_SERVER_Client *client,
368 const struct GNUNET_MessageHeader *message)
370 const struct StartMessage *start;
371 struct TransportClient *tc;
373 tc = lookup_client (client);
377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
378 "Client %X sent START\n", tc);
380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
381 "Client %X sent START\n", tc);
385 /* got 'start' twice from the same client, not allowed */
387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
388 "TransportClient %X ServerClient %X sent multiple START messages\n",
392 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
395 start = (const struct StartMessage *) message;
396 if ((GNUNET_NO != ntohl (start->do_check)) &&
398 memcmp (&start->self, &GST_my_identity,
399 sizeof (struct GNUNET_PeerIdentity))))
401 /* client thinks this is a different peer, reject */
402 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
404 ("Rejecting control connection from peer `%s', which is not me!\n"),
405 GNUNET_i2s (&start->self));
406 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
409 tc = setup_client (client);
411 unicast (tc, GST_hello_get (), GNUNET_NO);
412 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
413 GNUNET_SERVER_receive_done (client, GNUNET_OK);
418 * Client sent us a HELLO. Process the request.
421 * @param client the client
422 * @param message the HELLO message
425 clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
426 const struct GNUNET_MessageHeader *message)
428 GST_validation_handle_hello (message);
429 GNUNET_SERVER_receive_done (client, GNUNET_OK);
434 * Closure for 'handle_send_transmit_continuation'
436 struct SendTransmitContinuationContext
439 * Client that made the request.
441 struct GNUNET_SERVER_Client *client;
444 * Peer that was the target.
446 struct GNUNET_PeerIdentity target;
451 * Function called after the transmission is done. Notify the client that it is
452 * OK to send the next message.
455 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
458 handle_send_transmit_continuation (void *cls, int success)
460 struct SendTransmitContinuationContext *stcc = cls;
461 struct SendOkMessage send_ok_msg;
463 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
464 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
465 send_ok_msg.success = htonl (success);
466 send_ok_msg.latency =
467 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
468 send_ok_msg.peer = stcc->target;
469 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
470 GNUNET_SERVER_client_drop (stcc->client);
476 * Client asked for transmission to a peer. Process the request.
479 * @param client the client
480 * @param message the send message that was sent
483 clients_handle_send (void *cls, struct GNUNET_SERVER_Client *client,
484 const struct GNUNET_MessageHeader *message)
486 const struct OutboundMessage *obm;
487 const struct GNUNET_MessageHeader *obmm;
488 struct SendTransmitContinuationContext *stcc;
491 struct TransportClient *tc;
493 tc = lookup_client (client);
496 /* client asked for transmission before 'START' */
498 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
502 size = ntohs (message->size);
504 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
507 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
510 obm = (const struct OutboundMessage *) message;
511 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
512 msize = size - sizeof (struct OutboundMessage);
513 if (msize < sizeof (struct GNUNET_MessageHeader))
516 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
519 GNUNET_STATISTICS_update (GST_stats,
521 ("# bytes payload received for other peers"), msize,
524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
525 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
526 "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
528 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
530 /* not connected, not allowed to send; can happen due to asynchronous operations */
532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
533 "Could not send message to peer `%s': not connected\n",
534 GNUNET_i2s (&obm->peer));
536 GNUNET_STATISTICS_update (GST_stats,
538 ("# bytes payload dropped (other peer was not connected)"),
540 GNUNET_SERVER_receive_done (client, GNUNET_OK);
543 GNUNET_SERVER_receive_done (client, GNUNET_OK);
544 stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
545 stcc->target = obm->peer;
546 stcc->client = client;
547 GNUNET_SERVER_client_keep (client);
548 GST_neighbours_send (&obm->peer, obmm, msize,
549 GNUNET_TIME_relative_ntoh (obm->timeout),
550 &handle_send_transmit_continuation, stcc);
555 * Try to initiate a connection to the given peer if the blacklist
558 * @param cls closure (unused, NULL)
559 * @param peer identity of peer that was tested
560 * @param result GNUNET_OK if the connection is allowed,
564 try_connect_if_allowed (void *cls, const struct GNUNET_PeerIdentity *peer,
567 if (GNUNET_OK != result)
568 return; /* not allowed */
569 GST_neighbours_try_connect (peer);
574 * Handle request connect message
576 * @param cls closure (always NULL)
577 * @param client identification of the client
578 * @param message the actual message
581 clients_handle_request_connect (void *cls, struct GNUNET_SERVER_Client *client,
582 const struct GNUNET_MessageHeader *message)
584 const struct TransportRequestConnectMessage *trcm =
585 (const struct TransportRequestConnectMessage *) message;
587 GNUNET_STATISTICS_update (GST_stats,
589 ("# REQUEST CONNECT messages received"), 1,
592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
593 "Received a request connect message for peer `%s'\n",
594 GNUNET_i2s (&trcm->peer));
596 (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
598 GNUNET_SERVER_receive_done (client, GNUNET_OK);
603 * Take the given address and append it to the set of results sent back to
606 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
607 * @param address the resolved name, NULL to indicate the last response
610 transmit_address_to_client (void *cls, const char *buf)
612 struct GNUNET_SERVER_TransmitContext *tc = cls;
616 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
617 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
618 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
621 GNUNET_SERVER_transmit_context_append_data (tc, buf, strlen (buf) + 1,
622 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
627 * Take the given address and append it to the set of results sent back to
630 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
631 * @param address the resolved name, NULL to indicate the last response
634 transmit_binary_to_client (void *cls, void *buf, size_t size)
636 struct GNUNET_SERVER_TransmitContext *tc = cls;
640 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
641 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
642 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
645 GNUNET_SERVER_transmit_context_append_data (tc, buf, size,
646 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
651 * Client asked to resolve an address. Process the request.
654 * @param client the client
655 * @param message the resolution request
658 clients_handle_address_lookup (void *cls, struct GNUNET_SERVER_Client *client,
659 const struct GNUNET_MessageHeader *message)
661 const struct AddressLookupMessage *alum;
662 struct GNUNET_TRANSPORT_PluginFunctions *papi;
663 const char *plugin_name;
665 uint32_t address_len;
667 struct GNUNET_SERVER_TransmitContext *tc;
668 struct GNUNET_TIME_Relative rtimeout;
671 size = ntohs (message->size);
672 if (size < sizeof (struct AddressLookupMessage))
675 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
678 alum = (const struct AddressLookupMessage *) message;
679 address_len = ntohl (alum->addrlen);
680 if (size <= sizeof (struct AddressLookupMessage) + address_len)
683 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
686 address = (const char *) &alum[1];
687 plugin_name = (const char *) &address[address_len];
688 if (plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1]
692 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
695 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
696 numeric = ntohl (alum->numeric_only);
697 tc = GNUNET_SERVER_transmit_context_create (client);
698 papi = GST_plugins_find (plugin_name);
701 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
702 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
703 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
706 GNUNET_SERVER_disable_receive_done_warning (client);
707 papi->address_pretty_printer (papi->cls, plugin_name, address, address_len,
708 numeric, rtimeout, &transmit_address_to_client,
714 * Send an address to the client.
716 * @param cls our 'struct GNUNET_SERVER_TransmitContext' (for sending)
717 * @param public_key public key for the peer, never NULL
718 * @param target peer this change is about, never NULL
719 * @param valid_until until what time do we consider the address valid?
720 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
721 * is ZERO if the address is considered valid (no validation needed)
722 * is a time in the future if we're currently denying re-validation
723 * @param plugin_name name of the plugin
724 * @param plugin_address binary address
725 * @param plugin_address_len length of address
728 send_address_to_client (void *cls,
729 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
730 *public_key, const struct GNUNET_PeerIdentity *target,
731 struct GNUNET_TIME_Absolute valid_until,
732 struct GNUNET_TIME_Absolute validation_block,
733 const char *plugin_name, const void *plugin_address,
734 size_t plugin_address_len)
736 struct GNUNET_SERVER_TransmitContext *tc = cls;
739 /* FIXME: move to a binary format!!! */
740 GNUNET_asprintf (&addr_buf, "%s --- %s, %s",
741 GST_plugins_a2s (plugin_name, plugin_address,
744 GST_neighbours_test_connected (target)) ? "CONNECTED" :
746 (GNUNET_TIME_absolute_get_remaining (valid_until).rel_value >
747 0) ? "VALIDATED" : "UNVALIDATED");
748 transmit_address_to_client (tc, addr_buf);
749 GNUNET_free (addr_buf);
754 * Client asked to obtain information about a peer's addresses.
755 * Process the request.
756 * FIXME: use better name!
759 * @param client the client
760 * @param message the peer address information request
763 clients_handle_peer_address_lookup (void *cls,
764 struct GNUNET_SERVER_Client *client,
765 const struct GNUNET_MessageHeader *message)
767 const struct PeerAddressLookupMessage *peer_address_lookup;
768 struct GNUNET_SERVER_TransmitContext *tc;
770 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
771 GNUNET_break (ntohl (peer_address_lookup->reserved) == 0);
772 tc = GNUNET_SERVER_transmit_context_create (client);
773 GST_validation_get_addresses (&peer_address_lookup->peer,
774 &send_address_to_client, tc);
775 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
776 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
777 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
782 * Output the active address of connected neighbours to the given client.
784 * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
785 * @param neighbour identity of the neighbour
786 * @param ats performance data
787 * @param ats_count number of entries in ats (excluding 0-termination)
788 * @param transport plugin
789 * @param addr address
790 * @param addrlen address length
793 output_addresses (void *cls, const struct GNUNET_PeerIdentity *peer,
794 const struct GNUNET_ATS_Information *ats,
796 const char * transport,
800 struct GNUNET_SERVER_TransmitContext *tc = cls;
801 struct AddressIterateResponseMessage * msg;
805 (sizeof (struct AddressIterateResponseMessage) + strlen(transport) + 1);
806 msg = GNUNET_malloc (size);
807 memcpy (&msg->peer, peer, sizeof (struct GNUNET_PeerIdentity));
808 memcpy (&msg[0], transport, strlen(transport)+1);
809 msg->addrlen = ntohs (addrlen);
810 msg->pluginlen = ntohs (strlen(transport)+1);
812 transmit_binary_to_client (tc, msg, size);
818 * Client asked to obtain information about all actively used addresses.
819 * Process the request. FIXME: use better name!
822 * @param client the client
823 * @param message the peer address information request
826 clients_handle_address_iterate (void *cls, struct GNUNET_SERVER_Client *client,
827 const struct GNUNET_MessageHeader *message)
829 struct GNUNET_SERVER_TransmitContext *tc;
831 GNUNET_SERVER_disable_receive_done_warning (client);
832 tc = GNUNET_SERVER_transmit_context_create (client);
833 GST_neighbours_iterate (&output_addresses, tc);
834 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
835 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
836 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
841 * Start handling requests from clients.
843 * @param server server used to accept clients from.
846 GST_clients_start (struct GNUNET_SERVER_Handle *server)
848 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
849 {&clients_handle_start, NULL,
850 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
851 {&clients_handle_hello, NULL,
852 GNUNET_MESSAGE_TYPE_HELLO, 0},
853 {&clients_handle_send, NULL,
854 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
855 {&clients_handle_request_connect, NULL,
856 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
857 sizeof (struct TransportRequestConnectMessage)},
858 {&clients_handle_address_lookup, NULL,
859 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP, 0},
860 {&clients_handle_peer_address_lookup, NULL,
861 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
862 sizeof (struct PeerAddressLookupMessage)},
863 {&clients_handle_address_iterate, NULL,
864 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
865 sizeof (struct AddressIterateMessage)},
866 {&GST_blacklist_handle_init, NULL,
867 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
868 sizeof (struct GNUNET_MessageHeader)},
869 {&GST_blacklist_handle_reply, NULL,
870 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
871 sizeof (struct BlacklistMessage)},
874 GNUNET_SERVER_add_handlers (server, handlers);
875 GNUNET_SERVER_disconnect_notify (server, &client_disconnect_notification,
881 * Stop processing clients.
891 * Broadcast the given message to all of our clients.
893 * @param msg message to broadcast
894 * @param may_drop GNUNET_YES if the message can be dropped
897 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
899 struct TransportClient *tc;
901 for (tc = clients_head; tc != NULL; tc = tc->next)
902 unicast (tc, msg, may_drop);
907 * Send the given message to a particular client
909 * @param client target of the message
910 * @param msg message to transmit
911 * @param may_drop GNUNET_YES if the message can be dropped
914 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
915 const struct GNUNET_MessageHeader *msg, int may_drop)
917 struct TransportClient *tc;
919 tc = lookup_client (client);
921 return; /* client got disconnected in the meantime, drop message */
922 unicast (tc, msg, may_drop);
926 /* end of file gnunet-service-transport_clients.c */