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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;
113 * Is this client interested in payload messages?
120 * Head of linked list of all clients to this service.
122 static struct TransportClient *clients_head;
125 * Tail of linked list of all clients to this service.
127 static struct TransportClient *clients_tail;
130 * Find the internal handle associated with the given client handle
132 * @param client server's client handle to look up
133 * @return internal client handle
135 static struct TransportClient *
136 lookup_client (struct GNUNET_SERVER_Client *client)
138 struct TransportClient *tc;
143 if (tc->client == client)
152 * Create the internal handle for the given server client handle
154 * @param client server's client handle to create our internal handle for
155 * @return fresh internal client handle
157 static struct TransportClient *
158 setup_client (struct GNUNET_SERVER_Client *client)
160 struct TransportClient *tc;
162 GNUNET_assert (lookup_client (client) == NULL);
163 tc = GNUNET_malloc (sizeof (struct TransportClient));
165 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, tc);
168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %X connected\n", tc);
175 * Function called to notify a client about the socket being ready to
176 * queue more data. "buf" will be NULL and "size" zero if the socket
177 * was closed for writing in the meantime.
180 * @param size number of bytes available in buf
181 * @param buf where the callee should write the message
182 * @return number of bytes written to buf
185 transmit_to_client_callback (void *cls, size_t size, void *buf)
187 struct TransportClient *tc = cls;
188 struct ClientMessageQueueEntry *q;
189 const struct GNUNET_MessageHeader *msg;
198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
199 "Transmission to client failed, closing connection.\n");
205 while (NULL != (q = tc->message_queue_head))
207 msg = (const struct GNUNET_MessageHeader *) &q[1];
208 msize = ntohs (msg->size);
209 if (msize + tsize > size)
212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
213 "Transmitting message of type %u to client %X.\n",
214 ntohs (msg->type), tc);
216 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
219 memcpy (&cbuf[tsize], msg, msize);
225 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
227 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
228 GNUNET_TIME_UNIT_FOREVER_REL,
229 &transmit_to_client_callback, tc);
230 GNUNET_assert (tc->th != NULL);
237 * Queue the given message for transmission to the given client
239 * @param tc target of the message
240 * @param msg message to transmit
241 * @param may_drop GNUNET_YES if the message can be dropped
244 unicast (struct TransportClient *tc, const struct GNUNET_MessageHeader *msg,
247 struct ClientMessageQueueEntry *q;
250 if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
252 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
254 ("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
255 ntohs (msg->type), ntohs (msg->size), tc->message_count,
257 GNUNET_STATISTICS_update (GST_stats,
259 ("# messages dropped due to slow client"), 1,
263 msize = ntohs (msg->size);
264 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
265 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
266 memcpy (&q[1], msg, msize);
267 GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
268 tc->message_queue_tail, q);
273 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
274 GNUNET_TIME_UNIT_FOREVER_REL,
275 &transmit_to_client_callback, tc);
276 GNUNET_assert (tc->th != NULL);
281 * Called whenever a client is disconnected. Frees our
282 * resources associated with that client.
285 * @param client identification of the client
288 client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
290 struct TransportClient *tc;
291 struct ClientMessageQueueEntry *mqe;
295 tc = lookup_client (client);
299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
300 "Client %X disconnected, cleaning up.\n", tc);
302 while (NULL != (mqe = tc->message_queue_head))
304 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
309 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
312 GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
315 GNUNET_break (0 == tc->message_count);
321 * Function called for each of our connected neighbours. Notify the
322 * client about the existing neighbour.
324 * @param cls the 'struct TransportClient' to notify
325 * @param peer identity of the neighbour
326 * @param ats performance data
327 * @param ats_count number of entries in ats (excluding 0-termination)
328 * @param transport plugin
329 * @param addr address
330 * @param addrlen address length
333 notify_client_about_neighbour (void *cls,
334 const struct GNUNET_PeerIdentity *peer,
335 const struct GNUNET_ATS_Information *ats,
336 uint32_t ats_count, const char *transport,
337 const void *addr, size_t addrlen)
339 struct TransportClient *tc = cls;
340 struct ConnectInfoMessage *cim;
341 struct GNUNET_ATS_Information *ap;
343 sizeof (struct ConnectInfoMessage) +
344 ats_count * sizeof (struct GNUNET_ATS_Information);
347 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
348 cim = (struct ConnectInfoMessage *) buf;
349 cim->header.size = htons (size);
350 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
351 cim->ats_count = htonl (ats_count);
353 ap = (struct GNUNET_ATS_Information *) &cim[1];
354 memcpy (ap, ats, ats_count * sizeof (struct GNUNET_ATS_Information));
355 unicast (tc, &cim->header, GNUNET_NO);
360 * Initialize a normal client. We got a start message from this
361 * client, add him to the list of clients for broadcasting of inbound
365 * @param client the client
366 * @param message the start message that was sent
369 clients_handle_start (void *cls, struct GNUNET_SERVER_Client *client,
370 const struct GNUNET_MessageHeader *message)
372 const struct StartMessage *start;
373 struct TransportClient *tc;
376 tc = lookup_client (client);
380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
381 "Client %X sent START\n", tc);
383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
384 "Client %X sent START\n", tc);
388 /* got 'start' twice from the same client, not allowed */
390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
391 "TransportClient %X ServerClient %X sent multiple START messages\n",
395 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
398 start = (const struct StartMessage *) message;
399 options = ntohl (start->options);
400 if ((0 != (1 & options)) &&
402 memcmp (&start->self, &GST_my_identity,
403 sizeof (struct GNUNET_PeerIdentity))))
405 /* client thinks this is a different peer, reject */
406 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
408 ("Rejecting control connection from peer `%s', which is not me!\n"),
409 GNUNET_i2s (&start->self));
410 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
413 tc = setup_client (client);
414 tc->send_payload = (0 != (2 & options));
415 unicast (tc, GST_hello_get (), GNUNET_NO);
416 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
417 GNUNET_SERVER_receive_done (client, GNUNET_OK);
422 * Client sent us a HELLO. Process the request.
425 * @param client the client
426 * @param message the HELLO message
429 clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
430 const struct GNUNET_MessageHeader *message)
432 GST_validation_handle_hello (message);
433 GNUNET_SERVER_receive_done (client, GNUNET_OK);
438 * Closure for 'handle_send_transmit_continuation'
440 struct SendTransmitContinuationContext
443 * Client that made the request.
445 struct GNUNET_SERVER_Client *client;
448 * Peer that was the target.
450 struct GNUNET_PeerIdentity target;
455 * Function called after the transmission is done. Notify the client that it is
456 * OK to send the next message.
459 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
462 handle_send_transmit_continuation (void *cls, int success)
464 struct SendTransmitContinuationContext *stcc = cls;
465 struct SendOkMessage send_ok_msg;
467 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
468 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
469 send_ok_msg.success = htonl (success);
470 send_ok_msg.latency =
471 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
472 send_ok_msg.peer = stcc->target;
473 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
474 GNUNET_SERVER_client_drop (stcc->client);
480 * Client asked for transmission to a peer. Process the request.
483 * @param client the client
484 * @param message the send message that was sent
487 clients_handle_send (void *cls, struct GNUNET_SERVER_Client *client,
488 const struct GNUNET_MessageHeader *message)
490 const struct OutboundMessage *obm;
491 const struct GNUNET_MessageHeader *obmm;
492 struct SendTransmitContinuationContext *stcc;
495 struct TransportClient *tc;
497 tc = lookup_client (client);
500 /* client asked for transmission before 'START' */
502 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
506 size = ntohs (message->size);
508 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
511 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
514 obm = (const struct OutboundMessage *) message;
515 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
516 msize = size - sizeof (struct OutboundMessage);
517 if (msize < sizeof (struct GNUNET_MessageHeader))
520 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
523 GNUNET_STATISTICS_update (GST_stats,
525 ("# bytes payload received for other peers"), msize,
528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
529 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
530 "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
532 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
534 /* not connected, not allowed to send; can happen due to asynchronous operations */
536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
537 "Could not send message to peer `%s': not connected\n",
538 GNUNET_i2s (&obm->peer));
540 GNUNET_STATISTICS_update (GST_stats,
542 ("# bytes payload dropped (other peer was not connected)"),
544 GNUNET_SERVER_receive_done (client, GNUNET_OK);
547 GNUNET_SERVER_receive_done (client, GNUNET_OK);
548 stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
549 stcc->target = obm->peer;
550 stcc->client = client;
551 GNUNET_SERVER_client_keep (client);
552 GST_neighbours_send (&obm->peer, obmm, msize,
553 GNUNET_TIME_relative_ntoh (obm->timeout),
554 &handle_send_transmit_continuation, stcc);
559 * Try to initiate a connection to the given peer if the blacklist
562 * @param cls closure (unused, NULL)
563 * @param peer identity of peer that was tested
564 * @param result GNUNET_OK if the connection is allowed,
568 try_connect_if_allowed (void *cls, const struct GNUNET_PeerIdentity *peer,
571 if (GNUNET_OK != result)
572 return; /* not allowed */
573 GST_neighbours_try_connect (peer);
578 * Handle request connect message
580 * @param cls closure (always NULL)
581 * @param client identification of the client
582 * @param message the actual message
585 clients_handle_request_connect (void *cls, struct GNUNET_SERVER_Client *client,
586 const struct GNUNET_MessageHeader *message)
588 const struct TransportRequestConnectMessage *trcm =
589 (const struct TransportRequestConnectMessage *) message;
591 GNUNET_STATISTICS_update (GST_stats,
593 ("# REQUEST CONNECT messages received"), 1,
596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
597 "Received a request connect message for peer `%s'\n",
598 GNUNET_i2s (&trcm->peer));
600 (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
602 GNUNET_SERVER_receive_done (client, GNUNET_OK);
607 * Take the given address and append it to the set of results sent back to
610 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
611 * @param address the resolved name, NULL to indicate the last response
614 transmit_address_to_client (void *cls, const char *buf)
616 struct GNUNET_SERVER_TransmitContext *tc = cls;
620 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
621 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
622 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
625 GNUNET_SERVER_transmit_context_append_data (tc, buf, strlen (buf) + 1,
626 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
631 * Take the given address and append it to the set of results sent back to
634 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
635 * @param address the resolved name, NULL to indicate the last response
638 transmit_binary_to_client (void *cls, void *buf, size_t size)
640 struct GNUNET_SERVER_TransmitContext *tc = cls;
644 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
645 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
646 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
649 GNUNET_SERVER_transmit_context_append_data (tc, buf, size,
650 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
655 * Client asked to resolve an address. Process the request.
658 * @param client the client
659 * @param message the resolution request
662 clients_handle_address_lookup (void *cls, struct GNUNET_SERVER_Client *client,
663 const struct GNUNET_MessageHeader *message)
665 const struct AddressLookupMessage *alum;
666 struct GNUNET_TRANSPORT_PluginFunctions *papi;
667 const char *plugin_name;
669 uint32_t address_len;
671 struct GNUNET_SERVER_TransmitContext *tc;
672 struct GNUNET_TIME_Relative rtimeout;
675 size = ntohs (message->size);
676 if (size < sizeof (struct AddressLookupMessage))
679 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
682 alum = (const struct AddressLookupMessage *) message;
683 address_len = ntohl (alum->addrlen);
684 if (size <= sizeof (struct AddressLookupMessage) + address_len)
687 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
690 address = (const char *) &alum[1];
691 plugin_name = (const char *) &address[address_len];
692 if (plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1]
696 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
699 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
700 numeric = ntohl (alum->numeric_only);
701 tc = GNUNET_SERVER_transmit_context_create (client);
702 papi = GST_plugins_find (plugin_name);
705 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
706 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
707 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
710 GNUNET_SERVER_disable_receive_done_warning (client);
711 papi->address_pretty_printer (papi->cls, plugin_name, address, address_len,
712 numeric, rtimeout, &transmit_address_to_client,
718 * Send an address to the client.
720 * @param cls our 'struct GNUNET_SERVER_TransmitContext' (for sending)
721 * @param public_key public key for the peer, never NULL
722 * @param target peer this change is about, never NULL
723 * @param valid_until until what time do we consider the address valid?
724 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
725 * is ZERO if the address is considered valid (no validation needed)
726 * is a time in the future if we're currently denying re-validation
727 * @param plugin_name name of the plugin
728 * @param plugin_address binary address
729 * @param plugin_address_len length of address
732 send_address_to_client (void *cls,
733 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
734 *public_key, const struct GNUNET_PeerIdentity *target,
735 struct GNUNET_TIME_Absolute valid_until,
736 struct GNUNET_TIME_Absolute validation_block,
737 const char *plugin_name, const void *plugin_address,
738 size_t plugin_address_len)
740 struct GNUNET_SERVER_TransmitContext *tc = cls;
743 /* FIXME: move to a binary format!!! */
744 GNUNET_asprintf (&addr_buf, "%s --- %s, %s",
745 GST_plugins_a2s (plugin_name, plugin_address,
748 GST_neighbours_test_connected (target)) ? "CONNECTED" :
750 (GNUNET_TIME_absolute_get_remaining (valid_until).rel_value >
751 0) ? "VALIDATED" : "UNVALIDATED");
752 transmit_address_to_client (tc, addr_buf);
753 GNUNET_free (addr_buf);
758 * Client asked to obtain information about a peer's addresses.
759 * Process the request.
760 * FIXME: use better name!
763 * @param client the client
764 * @param message the peer address information request
767 clients_handle_peer_address_lookup (void *cls,
768 struct GNUNET_SERVER_Client *client,
769 const struct GNUNET_MessageHeader *message)
771 const struct PeerAddressLookupMessage *peer_address_lookup;
772 struct GNUNET_SERVER_TransmitContext *tc;
774 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
775 GNUNET_break (ntohl (peer_address_lookup->reserved) == 0);
776 tc = GNUNET_SERVER_transmit_context_create (client);
777 GST_validation_get_addresses (&peer_address_lookup->peer,
778 &send_address_to_client, tc);
779 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
780 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
781 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
786 * Output the active address of connected neighbours to the given client.
788 * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
789 * @param neighbour identity of the neighbour
790 * @param ats performance data
791 * @param ats_count number of entries in ats (excluding 0-termination)
792 * @param transport plugin
793 * @param addr address
794 * @param addrlen address length
797 output_addresses (void *cls, const struct GNUNET_PeerIdentity *peer,
798 const struct GNUNET_ATS_Information *ats, uint32_t ats_count,
799 const char *transport, const void *addr, size_t addrlen)
801 struct GNUNET_SERVER_TransmitContext *tc = cls;
802 struct AddressIterateResponseMessage *msg;
806 (sizeof (struct AddressIterateResponseMessage) + strlen (transport) + 1);
807 msg = GNUNET_malloc (size);
808 memcpy (&msg->peer, peer, sizeof (struct GNUNET_PeerIdentity));
809 memcpy (&msg[0], transport, strlen (transport) + 1);
810 msg->addrlen = ntohs (addrlen);
811 msg->pluginlen = ntohs (strlen (transport) + 1);
813 transmit_binary_to_client (tc, msg, size);
819 * Client asked to obtain information about all actively used addresses.
820 * Process the request. FIXME: use better name!
823 * @param client the client
824 * @param message the peer address information request
827 clients_handle_address_iterate (void *cls, struct GNUNET_SERVER_Client *client,
828 const struct GNUNET_MessageHeader *message)
830 struct GNUNET_SERVER_TransmitContext *tc;
832 GNUNET_SERVER_disable_receive_done_warning (client);
833 tc = GNUNET_SERVER_transmit_context_create (client);
834 GST_neighbours_iterate (&output_addresses, tc);
835 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
836 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
837 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
842 * Start handling requests from clients.
844 * @param server server used to accept clients from.
847 GST_clients_start (struct GNUNET_SERVER_Handle *server)
849 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
850 {&clients_handle_start, NULL,
851 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
852 {&clients_handle_hello, NULL,
853 GNUNET_MESSAGE_TYPE_HELLO, 0},
854 {&clients_handle_send, NULL,
855 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
856 {&clients_handle_request_connect, NULL,
857 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
858 sizeof (struct TransportRequestConnectMessage)},
859 {&clients_handle_address_lookup, NULL,
860 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP, 0},
861 {&clients_handle_peer_address_lookup, NULL,
862 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
863 sizeof (struct PeerAddressLookupMessage)},
864 {&clients_handle_address_iterate, NULL,
865 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
866 sizeof (struct AddressIterateMessage)},
867 {&GST_blacklist_handle_init, NULL,
868 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
869 sizeof (struct GNUNET_MessageHeader)},
870 {&GST_blacklist_handle_reply, NULL,
871 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
872 sizeof (struct BlacklistMessage)},
875 GNUNET_SERVER_add_handlers (server, handlers);
876 GNUNET_SERVER_disconnect_notify (server, &client_disconnect_notification,
882 * Stop processing clients.
892 * Broadcast the given message to all of our clients.
894 * @param msg message to broadcast
895 * @param may_drop GNUNET_YES if the message can be dropped / is payload
898 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
900 struct TransportClient *tc;
902 for (tc = clients_head; tc != NULL; tc = tc->next)
904 if ((GNUNET_YES == may_drop) && (GNUNET_YES != tc->send_payload))
905 continue; /* skip, this client does not care about payload */
906 unicast (tc, msg, may_drop);
912 * Send the given message to a particular client
914 * @param client target of the message
915 * @param msg message to transmit
916 * @param may_drop GNUNET_YES if the message can be dropped
919 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
920 const struct GNUNET_MessageHeader *msg, int may_drop)
922 struct TransportClient *tc;
924 tc = lookup_client (client);
926 return; /* client got disconnected in the meantime, drop message */
927 unicast (tc, msg, may_drop);
931 /* end of file gnunet-service-transport_clients.c */