2 This file is part of GNUnet.
3 (C) 2010,2011 Christian Grothoff (and other contributing authors)
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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
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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.
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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 tc 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)
320 * @param transport plugin
321 * @param addr address
322 * @param addrlen address length
325 notify_client_about_neighbour (void *cls,
326 const struct GNUNET_PeerIdentity *peer,
327 const struct GNUNET_TRANSPORT_ATS_Information
328 *ats, uint32_t ats_count,
329 const char * transport,
333 struct TransportClient *tc = cls;
334 struct ConnectInfoMessage *cim;
338 sizeof (struct ConnectInfoMessage) +
339 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
340 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
341 cim = GNUNET_malloc (size);
342 cim->header.size = htons (size);
343 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
344 cim->ats_count = htonl (ats_count);
346 memcpy (&cim->ats, ats,
347 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
348 unicast (tc, &cim->header, GNUNET_NO);
354 * Initialize a normal client. We got a start message from this
355 * client, add him to the list of clients for broadcasting of inbound
359 * @param client the client
360 * @param message the start message that was sent
363 clients_handle_start (void *cls, struct GNUNET_SERVER_Client *client,
364 const struct GNUNET_MessageHeader *message)
366 const struct StartMessage *start;
367 struct TransportClient *tc;
369 tc = lookup_client (client);
373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
374 "Client %X sent START\n", tc);
376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
377 "Client %X sent START\n", tc);
381 /* got 'start' twice from the same client, not allowed */
383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
384 "TransportClient %X ServerClient %X sent multiple START messages\n",
388 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
391 start = (const struct StartMessage *) message;
392 if ((GNUNET_NO != ntohl (start->do_check)) &&
394 memcmp (&start->self, &GST_my_identity,
395 sizeof (struct GNUNET_PeerIdentity))))
397 /* client thinks this is a different peer, reject */
398 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
400 ("Rejecting control connection from peer `%s', which is not me!\n"),
401 GNUNET_i2s (&start->self));
402 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
405 tc = setup_client (client);
407 unicast (tc, GST_hello_get (), GNUNET_NO);
408 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
409 GNUNET_SERVER_receive_done (client, GNUNET_OK);
414 * Client sent us a HELLO. Process the request.
417 * @param client the client
418 * @param message the HELLO message
421 clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
422 const struct GNUNET_MessageHeader *message)
424 GST_validation_handle_hello (message);
425 GNUNET_SERVER_receive_done (client, GNUNET_OK);
430 * Closure for 'handle_send_transmit_continuation'
432 struct SendTransmitContinuationContext
435 * Client that made the request.
437 struct GNUNET_SERVER_Client *client;
440 * Peer that was the target.
442 struct GNUNET_PeerIdentity target;
447 * Function called after the transmission is done. Notify the client that it is
448 * OK to send the next message.
451 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
454 handle_send_transmit_continuation (void *cls, int success)
456 struct SendTransmitContinuationContext *stcc = cls;
457 struct SendOkMessage send_ok_msg;
459 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
460 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
461 send_ok_msg.success = htonl (success);
462 send_ok_msg.latency =
463 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
464 send_ok_msg.peer = stcc->target;
465 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
466 GNUNET_SERVER_client_drop (stcc->client);
472 * Client asked for transmission to a peer. Process the request.
475 * @param client the client
476 * @param message the send message that was sent
479 clients_handle_send (void *cls, struct GNUNET_SERVER_Client *client,
480 const struct GNUNET_MessageHeader *message)
482 const struct OutboundMessage *obm;
483 const struct GNUNET_MessageHeader *obmm;
484 struct SendTransmitContinuationContext *stcc;
487 struct TransportClient *tc;
489 tc = lookup_client (client);
492 /* client asked for transmission before 'START' */
494 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
498 size = ntohs (message->size);
500 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
503 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
506 obm = (const struct OutboundMessage *) message;
507 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
508 msize = size - sizeof (struct OutboundMessage);
509 if (msize < sizeof (struct GNUNET_MessageHeader))
512 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
515 GNUNET_STATISTICS_update (GST_stats,
517 ("# bytes payload received for other peers"), msize,
520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
521 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
522 "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
524 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
526 /* not connected, not allowed to send; can happen due to asynchronous operations */
528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
529 "Could not send message to peer `%s': not connected\n",
530 GNUNET_i2s (&obm->peer));
532 GNUNET_STATISTICS_update (GST_stats,
534 ("# bytes payload dropped (other peer was not connected)"),
536 GNUNET_SERVER_receive_done (client, GNUNET_OK);
539 GNUNET_SERVER_receive_done (client, GNUNET_OK);
540 stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
541 stcc->target = obm->peer;
542 stcc->client = client;
543 GNUNET_SERVER_client_keep (client);
544 GST_neighbours_send (&obm->peer, obmm, msize,
545 GNUNET_TIME_relative_ntoh (obm->timeout),
546 &handle_send_transmit_continuation, stcc);
551 * Try to initiate a connection to the given peer if the blacklist
554 * @param cls closure (unused, NULL)
555 * @param peer identity of peer that was tested
556 * @param result GNUNET_OK if the connection is allowed,
560 try_connect_if_allowed (void *cls, const struct GNUNET_PeerIdentity *peer,
563 if (GNUNET_OK != result)
564 return; /* not allowed */
565 GST_neighbours_try_connect (peer);
570 * Handle request connect message
572 * @param cls closure (always NULL)
573 * @param client identification of the client
574 * @param message the actual message
577 clients_handle_request_connect (void *cls, struct GNUNET_SERVER_Client *client,
578 const struct GNUNET_MessageHeader *message)
580 const struct TransportRequestConnectMessage *trcm =
581 (const struct TransportRequestConnectMessage *) message;
583 GNUNET_STATISTICS_update (GST_stats,
585 ("# REQUEST CONNECT messages received"), 1,
588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
589 "Received a request connect message for peer `%s'\n",
590 GNUNET_i2s (&trcm->peer));
592 (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
594 GNUNET_SERVER_receive_done (client, GNUNET_OK);
599 * Client asked for a quota change for a particular peer. Process the request.
602 * @param client the client
603 * @param message the quota changing message
606 clients_handle_set_quota (void *cls, struct GNUNET_SERVER_Client *client,
607 const struct GNUNET_MessageHeader *message)
609 const struct QuotaSetMessage *qsm;
611 qsm = (const struct QuotaSetMessage *) message;
612 GNUNET_STATISTICS_update (GST_stats,
613 gettext_noop ("# SET QUOTA messages received"), 1,
616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
617 "Received `%s' request (new quota %u) from client for peer `%4s'\n",
618 "SET_QUOTA", (unsigned int) ntohl (qsm->quota.value__),
619 GNUNET_i2s (&qsm->peer));
621 GST_neighbours_set_incoming_quota (&qsm->peer, qsm->quota);
622 GNUNET_SERVER_receive_done (client, GNUNET_OK);
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_address_to_client (void *cls, const char *buf)
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, strlen (buf) + 1,
646 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
651 * Take the given address and append it to the set of results sent back to
654 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
655 * @param address the resolved name, NULL to indicate the last response
658 transmit_binary_to_client (void *cls, void *buf, size_t size)
660 struct GNUNET_SERVER_TransmitContext *tc = cls;
664 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
665 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
666 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
669 GNUNET_SERVER_transmit_context_append_data (tc, buf, size,
670 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
675 * Client asked to resolve an address. Process the request.
678 * @param client the client
679 * @param message the resolution request
682 clients_handle_address_lookup (void *cls, struct GNUNET_SERVER_Client *client,
683 const struct GNUNET_MessageHeader *message)
685 const struct AddressLookupMessage *alum;
686 struct GNUNET_TRANSPORT_PluginFunctions *papi;
687 const char *plugin_name;
689 uint32_t address_len;
691 struct GNUNET_SERVER_TransmitContext *tc;
692 struct GNUNET_TIME_Relative rtimeout;
695 size = ntohs (message->size);
696 if (size < sizeof (struct AddressLookupMessage))
699 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
702 alum = (const struct AddressLookupMessage *) message;
703 address_len = ntohl (alum->addrlen);
704 if (size <= sizeof (struct AddressLookupMessage) + address_len)
707 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
710 address = (const char *) &alum[1];
711 plugin_name = (const char *) &address[address_len];
712 if (plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1]
716 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
719 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
720 numeric = ntohl (alum->numeric_only);
721 tc = GNUNET_SERVER_transmit_context_create (client);
722 papi = GST_plugins_find (plugin_name);
725 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
726 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
727 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
730 GNUNET_SERVER_disable_receive_done_warning (client);
731 papi->address_pretty_printer (papi->cls, plugin_name, address, address_len,
732 numeric, rtimeout, &transmit_address_to_client,
738 * Send an address to the client.
740 * @param cls our 'struct GNUNET_SERVER_TransmitContext' (for sending)
741 * @param public_key public key for the peer, never NULL
742 * @param target peer this change is about, never NULL
743 * @param valid_until until what time do we consider the address valid?
744 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
745 * is ZERO if the address is considered valid (no validation needed)
746 * is a time in the future if we're currently denying re-validation
747 * @param plugin_name name of the plugin
748 * @param plugin_address binary address
749 * @param plugin_address_len length of address
752 send_address_to_client (void *cls,
753 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
754 *public_key, const struct GNUNET_PeerIdentity *target,
755 struct GNUNET_TIME_Absolute valid_until,
756 struct GNUNET_TIME_Absolute validation_block,
757 const char *plugin_name, const void *plugin_address,
758 size_t plugin_address_len)
760 struct GNUNET_SERVER_TransmitContext *tc = cls;
763 /* FIXME: move to a binary format!!! */
764 GNUNET_asprintf (&addr_buf, "%s --- %s, %s",
765 GST_plugins_a2s (plugin_name, plugin_address,
768 GST_neighbours_test_connected (target)) ? "CONNECTED" :
770 (GNUNET_TIME_absolute_get_remaining (valid_until).rel_value >
771 0) ? "VALIDATED" : "UNVALIDATED");
772 transmit_address_to_client (tc, addr_buf);
773 GNUNET_free (addr_buf);
778 * Client asked to obtain information about a peer's addresses.
779 * Process the request.
780 * FIXME: use better name!
783 * @param client the client
784 * @param message the peer address information request
787 clients_handle_peer_address_lookup (void *cls,
788 struct GNUNET_SERVER_Client *client,
789 const struct GNUNET_MessageHeader *message)
791 const struct PeerAddressLookupMessage *peer_address_lookup;
792 struct GNUNET_SERVER_TransmitContext *tc;
794 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
795 GNUNET_break (ntohl (peer_address_lookup->reserved) == 0);
796 tc = GNUNET_SERVER_transmit_context_create (client);
797 GST_validation_get_addresses (&peer_address_lookup->peer,
798 &send_address_to_client, tc);
799 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
800 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
801 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
806 * Output the active address of connected neighbours to the given client.
808 * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
809 * @param neighbour identity of the neighbour
810 * @param ats performance data
811 * @param ats_count number of entries in ats (excluding 0-termination)
812 * @param transport plugin
813 * @param addr address
814 * @param addrlen address length
817 output_addresses (void *cls, const struct GNUNET_PeerIdentity *peer,
818 const struct GNUNET_TRANSPORT_ATS_Information *ats,
820 const char * transport,
824 struct GNUNET_SERVER_TransmitContext *tc = cls;
825 struct AddressIterateResponseMessage * msg;
829 (sizeof (struct AddressIterateResponseMessage) + strlen(transport) + 1);
830 msg = GNUNET_malloc (size);
831 memcpy (&msg->peer, peer, sizeof (struct GNUNET_PeerIdentity));
832 memcpy (&msg[0], transport, strlen(transport)+1);
833 msg->addrlen = ntohs (addrlen);
834 msg->pluginlen = ntohs (strlen(transport)+1);
836 transmit_binary_to_client (tc, msg, size);
842 * Client asked to obtain information about all actively used addresses.
843 * Process the request. FIXME: use better name!
846 * @param client the client
847 * @param message the peer address information request
850 clients_handle_address_iterate (void *cls, struct GNUNET_SERVER_Client *client,
851 const struct GNUNET_MessageHeader *message)
853 struct GNUNET_SERVER_TransmitContext *tc;
855 GNUNET_SERVER_disable_receive_done_warning (client);
856 tc = GNUNET_SERVER_transmit_context_create (client);
857 GST_neighbours_iterate (&output_addresses, tc);
858 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
859 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
860 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
865 * Start handling requests from clients.
867 * @param server server used to accept clients from.
870 GST_clients_start (struct GNUNET_SERVER_Handle *server)
872 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
873 {&clients_handle_start, NULL,
874 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
875 {&clients_handle_hello, NULL,
876 GNUNET_MESSAGE_TYPE_HELLO, 0},
877 {&clients_handle_send, NULL,
878 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
879 {&clients_handle_request_connect, NULL,
880 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
881 sizeof (struct TransportRequestConnectMessage)},
882 {&clients_handle_set_quota, NULL,
883 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
884 {&clients_handle_address_lookup, NULL,
885 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP, 0},
886 {&clients_handle_peer_address_lookup, NULL,
887 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
888 sizeof (struct PeerAddressLookupMessage)},
889 {&clients_handle_address_iterate, NULL,
890 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
891 sizeof (struct AddressIterateMessage)},
892 {&GST_blacklist_handle_init, NULL,
893 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
894 sizeof (struct GNUNET_MessageHeader)},
895 {&GST_blacklist_handle_reply, NULL,
896 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
897 sizeof (struct BlacklistMessage)},
900 GNUNET_SERVER_add_handlers (server, handlers);
901 GNUNET_SERVER_disconnect_notify (server, &client_disconnect_notification,
907 * Stop processing clients.
917 * Broadcast the given message to all of our clients.
919 * @param msg message to broadcast
920 * @param may_drop GNUNET_YES if the message can be dropped
923 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
925 struct TransportClient *tc;
927 for (tc = clients_head; tc != NULL; tc = tc->next)
928 unicast (tc, msg, may_drop);
933 * Send the given message to a particular client
935 * @param client target of the message
936 * @param msg message to transmit
937 * @param may_drop GNUNET_YES if the message can be dropped
940 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
941 const struct GNUNET_MessageHeader *msg, int may_drop)
943 struct TransportClient *tc;
945 tc = lookup_client (client);
947 return; /* client got disconnected in the meantime, drop message */
948 unicast (tc, msg, may_drop);
952 /* end of file gnunet-service-transport_clients.c */