2 This file is part of GNUnet.
3 (C) 2010,2011 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/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));
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 %X.\n",
206 ntohs (msg->type), tc);
208 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
211 memcpy (&cbuf[tsize], msg, msize);
217 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
219 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
220 GNUNET_TIME_UNIT_FOREVER_REL,
221 &transmit_to_client_callback, tc);
222 GNUNET_assert (tc->th != NULL);
229 * Queue the given message for transmission to the given client
231 * @param client target of the message
232 * @param msg message to transmit
233 * @param may_drop GNUNET_YES if the message can be dropped
236 unicast (struct TransportClient *tc, const struct GNUNET_MessageHeader *msg,
239 struct ClientMessageQueueEntry *q;
242 if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
244 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
246 ("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
247 ntohs (msg->type), ntohs (msg->size), tc->message_count,
249 GNUNET_STATISTICS_update (GST_stats,
251 ("# messages dropped due to slow client"), 1,
255 msize = ntohs (msg->size);
256 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
257 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
258 memcpy (&q[1], msg, msize);
259 GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
260 tc->message_queue_tail, q);
265 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
266 GNUNET_TIME_UNIT_FOREVER_REL,
267 &transmit_to_client_callback, tc);
268 GNUNET_assert (tc->th != NULL);
273 * Called whenever a client is disconnected. Frees our
274 * resources associated with that client.
277 * @param client identification of the client
280 client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
282 struct TransportClient *tc;
283 struct ClientMessageQueueEntry *mqe;
287 tc = lookup_client (client);
291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
292 "Client %X disconnected, cleaning up.\n", tc);
294 while (NULL != (mqe = tc->message_queue_head))
296 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
301 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
304 GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
307 GNUNET_break (0 == tc->message_count);
313 * Function called for each of our connected neighbours. Notify the
314 * client about the existing neighbour.
316 * @param cls the 'struct TransportClient' to notify
317 * @param peer identity of the neighbour
318 * @param ats performance data
319 * @param ats_count number of entries in ats (excluding 0-termination)
322 notify_client_about_neighbour (void *cls,
323 const struct GNUNET_PeerIdentity *peer,
324 const struct GNUNET_TRANSPORT_ATS_Information
325 *ats, uint32_t ats_count)
327 struct TransportClient *tc = cls;
328 struct ConnectInfoMessage *cim;
332 sizeof (struct ConnectInfoMessage) +
333 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
334 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
335 cim = GNUNET_malloc (size);
336 cim->header.size = htons (size);
337 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
338 cim->ats_count = htonl (ats_count);
340 memcpy (&cim->ats, ats,
341 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
342 unicast (tc, &cim->header, GNUNET_NO);
348 * Initialize a normal client. We got a start message from this
349 * client, add him to the list of clients for broadcasting of inbound
353 * @param client the client
354 * @param message the start message that was sent
357 clients_handle_start (void *cls, struct GNUNET_SERVER_Client *client,
358 const struct GNUNET_MessageHeader *message)
360 const struct StartMessage *start;
361 struct TransportClient *tc;
363 tc = lookup_client (client);
367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
368 "Client %X sent START\n", tc);
370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
371 "Client %X sent START\n", tc);
375 /* got 'start' twice from the same client, not allowed */
377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
378 "TransportClient %X ServerClient %X sent multiple START messages\n",
382 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
385 start = (const struct StartMessage *) message;
386 if ((GNUNET_NO != ntohl (start->do_check)) &&
388 memcmp (&start->self, &GST_my_identity,
389 sizeof (struct GNUNET_PeerIdentity))))
391 /* client thinks this is a different peer, reject */
392 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
394 ("Rejecting control connection from peer `%s', which is not me!\n"),
395 GNUNET_i2s (&start->self));
396 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
399 tc = setup_client (client);
401 unicast (tc, GST_hello_get (), GNUNET_NO);
402 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
403 GNUNET_SERVER_receive_done (client, GNUNET_OK);
408 * Client sent us a HELLO. Process the request.
411 * @param client the client
412 * @param message the HELLO message
415 clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
416 const struct GNUNET_MessageHeader *message)
418 GST_validation_handle_hello (message);
419 GNUNET_SERVER_receive_done (client, GNUNET_OK);
424 * Closure for 'handle_send_transmit_continuation'
426 struct SendTransmitContinuationContext
429 * Client that made the request.
431 struct GNUNET_SERVER_Client *client;
434 * Peer that was the target.
436 struct GNUNET_PeerIdentity target;
441 * Function called after the transmission is done. Notify the client that it is
442 * OK to send the next message.
445 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
448 handle_send_transmit_continuation (void *cls, int success)
450 struct SendTransmitContinuationContext *stcc = cls;
451 struct SendOkMessage send_ok_msg;
453 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
454 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
455 send_ok_msg.success = htonl (success);
456 send_ok_msg.latency =
457 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
458 send_ok_msg.peer = stcc->target;
459 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
460 GNUNET_SERVER_client_drop (stcc->client);
466 * Client asked for transmission to a peer. Process the request.
469 * @param client the client
470 * @param message the send message that was sent
473 clients_handle_send (void *cls, struct GNUNET_SERVER_Client *client,
474 const struct GNUNET_MessageHeader *message)
476 const struct OutboundMessage *obm;
477 const struct GNUNET_MessageHeader *obmm;
478 struct SendTransmitContinuationContext *stcc;
481 struct TransportClient *tc;
483 tc = lookup_client (client);
486 /* client asked for transmission before 'START' */
488 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
492 size = ntohs (message->size);
494 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
497 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
500 obm = (const struct OutboundMessage *) message;
501 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
502 msize = size - sizeof (struct OutboundMessage);
503 if (msize < sizeof (struct GNUNET_MessageHeader))
506 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
509 GNUNET_STATISTICS_update (GST_stats,
511 ("# bytes payload received for other peers"), msize,
514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
515 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
516 "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
518 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
520 /* not connected, not allowed to send; can happen due to asynchronous operations */
522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
523 "Could not send message to peer `%s': not connected\n",
524 GNUNET_i2s (&obm->peer));
526 GNUNET_STATISTICS_update (GST_stats,
528 ("# bytes payload dropped (other peer was not connected)"),
530 GNUNET_SERVER_receive_done (client, GNUNET_OK);
533 GNUNET_SERVER_receive_done (client, GNUNET_OK);
534 stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
535 stcc->target = obm->peer;
536 stcc->client = client;
537 GNUNET_SERVER_client_keep (client);
538 GST_neighbours_send (&obm->peer, obmm, msize,
539 GNUNET_TIME_relative_ntoh (obm->timeout),
540 &handle_send_transmit_continuation, stcc);
545 * Try to initiate a connection to the given peer if the blacklist
548 * @param cls closure (unused, NULL)
549 * @param peer identity of peer that was tested
550 * @param result GNUNET_OK if the connection is allowed,
554 try_connect_if_allowed (void *cls, const struct GNUNET_PeerIdentity *peer,
557 if (GNUNET_OK != result)
558 return; /* not allowed */
559 GST_neighbours_try_connect (peer);
564 * Handle request connect message
566 * @param cls closure (always NULL)
567 * @param client identification of the client
568 * @param message the actual message
571 clients_handle_request_connect (void *cls, struct GNUNET_SERVER_Client *client,
572 const struct GNUNET_MessageHeader *message)
574 const struct TransportRequestConnectMessage *trcm =
575 (const struct TransportRequestConnectMessage *) message;
577 GNUNET_STATISTICS_update (GST_stats,
579 ("# REQUEST CONNECT messages received"), 1,
582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
583 "Received a request connect message for peer `%s'\n",
584 GNUNET_i2s (&trcm->peer));
586 (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
588 GNUNET_SERVER_receive_done (client, GNUNET_OK);
593 * Client asked for a quota change for a particular peer. Process the request.
596 * @param client the client
597 * @param message the quota changing message
600 clients_handle_set_quota (void *cls, struct GNUNET_SERVER_Client *client,
601 const struct GNUNET_MessageHeader *message)
603 const struct QuotaSetMessage *qsm;
605 qsm = (const struct QuotaSetMessage *) message;
606 GNUNET_STATISTICS_update (GST_stats,
607 gettext_noop ("# SET QUOTA messages received"), 1,
610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
611 "Received `%s' request (new quota %u) from client for peer `%4s'\n",
612 "SET_QUOTA", (unsigned int) ntohl (qsm->quota.value__),
613 GNUNET_i2s (&qsm->peer));
615 GST_neighbours_set_incoming_quota (&qsm->peer, qsm->quota);
616 GNUNET_SERVER_receive_done (client, GNUNET_OK);
621 * Take the given address and append it to the set of results sent back to
624 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
625 * @param address the resolved name, NULL to indicate the last response
628 transmit_address_to_client (void *cls, const char *address)
630 struct GNUNET_SERVER_TransmitContext *tc = cls;
634 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
635 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
636 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
639 GNUNET_SERVER_transmit_context_append_data (tc, address, strlen (address) + 1,
640 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
645 * Client asked to resolve an address. Process the request.
648 * @param client the client
649 * @param message the resolution request
652 clients_handle_address_lookup (void *cls, struct GNUNET_SERVER_Client *client,
653 const struct GNUNET_MessageHeader *message)
655 const struct AddressLookupMessage *alum;
656 struct GNUNET_TRANSPORT_PluginFunctions *papi;
657 const char *plugin_name;
659 uint32_t address_len;
661 struct GNUNET_SERVER_TransmitContext *tc;
662 struct GNUNET_TIME_Relative rtimeout;
665 size = ntohs (message->size);
666 if (size < sizeof (struct AddressLookupMessage))
669 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
672 alum = (const struct AddressLookupMessage *) message;
673 address_len = ntohl (alum->addrlen);
674 if (size <= sizeof (struct AddressLookupMessage) + address_len)
677 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
680 address = (const char *) &alum[1];
681 plugin_name = (const char *) &address[address_len];
682 if (plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1]
686 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
689 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
690 numeric = ntohl (alum->numeric_only);
691 tc = GNUNET_SERVER_transmit_context_create (client);
692 papi = GST_plugins_find (plugin_name);
695 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
696 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
697 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
700 GNUNET_SERVER_disable_receive_done_warning (client);
701 papi->address_pretty_printer (papi->cls, plugin_name, address, address_len,
702 numeric, rtimeout, &transmit_address_to_client,
708 * Send an address to the client.
710 * @param cls our 'struct GNUNET_SERVER_TransmitContext' (for sending)
711 * @param public_key public key for the peer, never NULL
712 * @param target peer this change is about, never NULL
713 * @param valid_until until what time do we consider the address valid?
714 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
715 * is ZERO if the address is considered valid (no validation needed)
716 * is a time in the future if we're currently denying re-validation
717 * @param plugin_name name of the plugin
718 * @param plugin_address binary address
719 * @param plugin_address_len length of address
722 send_address_to_client (void *cls,
723 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
724 *public_key, const struct GNUNET_PeerIdentity *target,
725 struct GNUNET_TIME_Absolute valid_until,
726 struct GNUNET_TIME_Absolute validation_block,
727 const char *plugin_name, const void *plugin_address,
728 size_t plugin_address_len)
730 struct GNUNET_SERVER_TransmitContext *tc = cls;
733 /* FIXME: move to a binary format!!! */
734 GNUNET_asprintf (&addr_buf, "%s --- %s, %s",
735 GST_plugins_a2s (plugin_name, plugin_address,
738 GST_neighbours_test_connected (target)) ? "CONNECTED" :
740 (GNUNET_TIME_absolute_get_remaining (valid_until).rel_value >
741 0) ? "VALIDATED" : "UNVALIDATED");
742 transmit_address_to_client (tc, addr_buf);
743 GNUNET_free (addr_buf);
748 * Client asked to obtain information about a peer's addresses.
749 * Process the request.
750 * FIXME: use better name!
753 * @param client the client
754 * @param message the peer address information request
757 clients_handle_peer_address_lookup (void *cls,
758 struct GNUNET_SERVER_Client *client,
759 const struct GNUNET_MessageHeader *message)
761 const struct PeerAddressLookupMessage *peer_address_lookup;
762 struct GNUNET_SERVER_TransmitContext *tc;
764 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
765 GNUNET_break (ntohl (peer_address_lookup->reserved) == 0);
766 tc = GNUNET_SERVER_transmit_context_create (client);
767 GST_validation_get_addresses (&peer_address_lookup->peer,
768 &send_address_to_client, tc);
769 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
770 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
771 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
776 * Output the active address of connected neighbours to the given client.
778 * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
779 * @param neighbour identity of the neighbour
780 * @param ats performance data
781 * @param ats_count number of entries in ats (excluding 0-termination)
784 output_addresses (void *cls, const struct GNUNET_PeerIdentity *neighbour,
785 const struct GNUNET_TRANSPORT_ATS_Information *ats,
788 struct GNUNET_SERVER_TransmitContext *tc = cls;
791 /* FIXME: move to a binary format!!! */
792 GNUNET_asprintf (&addr_buf, "%s: %s", GNUNET_i2s (neighbour),
793 GST_plugins_a2s ("FIXME", NULL, 0));
794 transmit_address_to_client (tc, addr_buf);
795 GNUNET_free (addr_buf);
800 * Client asked to obtain information about all actively used addresses.
801 * Process the request. FIXME: use better name!
804 * @param client the client
805 * @param message the peer address information request
808 clients_handle_address_iterate (void *cls, struct GNUNET_SERVER_Client *client,
809 const struct GNUNET_MessageHeader *message)
811 struct GNUNET_SERVER_TransmitContext *tc;
813 GNUNET_SERVER_disable_receive_done_warning (client);
814 tc = GNUNET_SERVER_transmit_context_create (client);
815 GST_neighbours_iterate (&output_addresses, tc);
816 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
817 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
818 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
823 * Start handling requests from clients.
825 * @param server server used to accept clients from.
828 GST_clients_start (struct GNUNET_SERVER_Handle *server)
830 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
831 {&clients_handle_start, NULL,
832 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
833 {&clients_handle_hello, NULL,
834 GNUNET_MESSAGE_TYPE_HELLO, 0},
835 {&clients_handle_send, NULL,
836 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
837 {&clients_handle_request_connect, NULL,
838 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
839 sizeof (struct TransportRequestConnectMessage)},
840 {&clients_handle_set_quota, NULL,
841 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
842 {&clients_handle_address_lookup, NULL,
843 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP, 0},
844 {&clients_handle_peer_address_lookup, NULL,
845 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
846 sizeof (struct PeerAddressLookupMessage)},
847 {&clients_handle_address_iterate, NULL,
848 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
849 sizeof (struct GNUNET_MessageHeader)},
850 {&GST_blacklist_handle_init, NULL,
851 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
852 sizeof (struct GNUNET_MessageHeader)},
853 {&GST_blacklist_handle_reply, NULL,
854 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
855 sizeof (struct BlacklistMessage)},
858 GNUNET_SERVER_add_handlers (server, handlers);
859 GNUNET_SERVER_disconnect_notify (server, &client_disconnect_notification,
865 * Stop processing clients.
875 * Broadcast the given message to all of our clients.
877 * @param msg message to broadcast
878 * @param may_drop GNUNET_YES if the message can be dropped
881 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
883 struct TransportClient *tc;
885 for (tc = clients_head; tc != NULL; tc = tc->next)
886 unicast (tc, msg, may_drop);
891 * Send the given message to a particular client
893 * @param client target of the message
894 * @param msg message to transmit
895 * @param may_drop GNUNET_YES if the message can be dropped
898 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
899 const struct GNUNET_MessageHeader *msg, int may_drop)
901 struct TransportClient *tc;
903 tc = lookup_client (client);
905 return; /* client got disconnected in the meantime, drop message */
906 unicast (tc, msg, may_drop);
910 /* end of file gnunet-service-transport_clients.c */