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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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 TransportClient *tmp;
185 struct ClientMessageQueueEntry *q;
186 const struct GNUNET_MessageHeader *msg;
202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
203 "Transmission to client failed, client already disconnected.\n");
212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
213 "Transmission to client failed, closing connection.\n");
219 while (NULL != (q = tc->message_queue_head))
221 msg = (const struct GNUNET_MessageHeader *) &q[1];
222 msize = ntohs (msg->size);
223 if (msize + tsize > size)
226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
227 "Transmitting message of type %u to client %X.\n",
228 ntohs (msg->type), tc);
230 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
233 memcpy (&cbuf[tsize], msg, msize);
239 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
241 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
242 GNUNET_TIME_UNIT_FOREVER_REL,
243 &transmit_to_client_callback, tc);
244 GNUNET_assert (tc->th != NULL);
251 * Queue the given message for transmission to the given client
253 * @param tc target of the message
254 * @param msg message to transmit
255 * @param may_drop GNUNET_YES if the message can be dropped
258 unicast (struct TransportClient *tc, const struct GNUNET_MessageHeader *msg,
261 struct ClientMessageQueueEntry *q;
264 if ((tc->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
266 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
268 ("Dropping message of type %u and size %u, have %u/%u messages pending\n"),
269 ntohs (msg->type), ntohs (msg->size), tc->message_count,
271 GNUNET_STATISTICS_update (GST_stats,
273 ("# messages dropped due to slow client"), 1,
277 msize = ntohs (msg->size);
278 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
279 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
280 memcpy (&q[1], msg, msize);
281 GNUNET_CONTAINER_DLL_insert_tail (tc->message_queue_head,
282 tc->message_queue_tail, q);
287 GNUNET_SERVER_notify_transmit_ready (tc->client, msize,
288 GNUNET_TIME_UNIT_FOREVER_REL,
289 &transmit_to_client_callback, tc);
290 GNUNET_assert (tc->th != NULL);
295 * Called whenever a client is disconnected. Frees our
296 * resources associated with that client.
299 * @param client identification of the client
302 client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
304 struct TransportClient *tc;
305 struct ClientMessageQueueEntry *mqe;
309 tc = lookup_client (client);
313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
314 "Client %X disconnected, cleaning up.\n", tc);
316 while (NULL != (mqe = tc->message_queue_head))
318 GNUNET_CONTAINER_DLL_remove (tc->message_queue_head, tc->message_queue_tail,
323 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, tc);
326 GNUNET_CONNECTION_notify_transmit_ready_cancel (tc->th);
329 GNUNET_break (0 == tc->message_count);
335 * Function called for each of our connected neighbours. Notify the
336 * client about the existing neighbour.
338 * @param cls the 'struct TransportClient' to notify
339 * @param peer identity of the neighbour
340 * @param ats performance data
341 * @param ats_count number of entries in ats (excluding 0-termination)
342 * @param transport plugin
343 * @param addr address
344 * @param addrlen address length
347 notify_client_about_neighbour (void *cls,
348 const struct GNUNET_PeerIdentity *peer,
349 const struct GNUNET_TRANSPORT_ATS_Information
350 *ats, uint32_t ats_count,
351 const char * transport,
355 struct TransportClient *tc = cls;
356 struct ConnectInfoMessage *cim;
360 sizeof (struct ConnectInfoMessage) +
361 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
362 GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
363 cim = GNUNET_malloc (size);
364 cim->header.size = htons (size);
365 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
366 cim->ats_count = htonl (ats_count);
368 memcpy (&cim->ats, ats,
369 ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
370 unicast (tc, &cim->header, GNUNET_NO);
376 * Initialize a normal client. We got a start message from this
377 * client, add him to the list of clients for broadcasting of inbound
381 * @param client the client
382 * @param message the start message that was sent
385 clients_handle_start (void *cls, struct GNUNET_SERVER_Client *client,
386 const struct GNUNET_MessageHeader *message)
388 const struct StartMessage *start;
389 struct TransportClient *tc;
391 tc = lookup_client (client);
395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
396 "Client %X sent START\n", tc);
398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
399 "Client %X sent START\n", tc);
403 /* got 'start' twice from the same client, not allowed */
405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
406 "TransportClient %X ServerClient %X sent multiple START messages\n",
410 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
413 start = (const struct StartMessage *) message;
414 if ((GNUNET_NO != ntohl (start->do_check)) &&
416 memcmp (&start->self, &GST_my_identity,
417 sizeof (struct GNUNET_PeerIdentity))))
419 /* client thinks this is a different peer, reject */
420 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
422 ("Rejecting control connection from peer `%s', which is not me!\n"),
423 GNUNET_i2s (&start->self));
424 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
427 tc = setup_client (client);
429 unicast (tc, GST_hello_get (), GNUNET_NO);
430 GST_neighbours_iterate (¬ify_client_about_neighbour, tc);
431 GNUNET_SERVER_receive_done (client, GNUNET_OK);
436 * Client sent us a HELLO. Process the request.
439 * @param client the client
440 * @param message the HELLO message
443 clients_handle_hello (void *cls, struct GNUNET_SERVER_Client *client,
444 const struct GNUNET_MessageHeader *message)
446 GST_validation_handle_hello (message);
447 GNUNET_SERVER_receive_done (client, GNUNET_OK);
452 * Closure for 'handle_send_transmit_continuation'
454 struct SendTransmitContinuationContext
457 * Client that made the request.
459 struct GNUNET_SERVER_Client *client;
462 * Peer that was the target.
464 struct GNUNET_PeerIdentity target;
469 * Function called after the transmission is done. Notify the client that it is
470 * OK to send the next message.
473 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
476 handle_send_transmit_continuation (void *cls, int success)
478 struct SendTransmitContinuationContext *stcc = cls;
479 struct SendOkMessage send_ok_msg;
480 struct TransportClient *tc;
482 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
483 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
484 send_ok_msg.success = htonl (success);
485 send_ok_msg.latency =
486 GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
487 send_ok_msg.peer = stcc->target;
488 tc = lookup_client(stcc->client);
492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
493 "Sending `%s' to client %X\n",
494 "GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK",
497 GST_clients_unicast (stcc->client, &send_ok_msg.header, GNUNET_NO);
498 GNUNET_SERVER_client_drop (stcc->client);
505 * Client asked for transmission to a peer. Process the request.
508 * @param client the client
509 * @param message the send message that was sent
512 clients_handle_send (void *cls, struct GNUNET_SERVER_Client *client,
513 const struct GNUNET_MessageHeader *message)
515 const struct OutboundMessage *obm;
516 const struct GNUNET_MessageHeader *obmm;
517 struct SendTransmitContinuationContext *stcc;
520 struct TransportClient *tc;
522 tc = lookup_client (client);
525 /* client asked for transmission before 'START' */
527 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
531 size = ntohs (message->size);
533 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
536 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
539 obm = (const struct OutboundMessage *) message;
540 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
541 msize = size - sizeof (struct OutboundMessage);
542 if (msize < sizeof (struct GNUNET_MessageHeader))
545 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
548 GNUNET_STATISTICS_update (GST_stats,
550 ("# bytes payload received for other peers"), msize,
553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
554 "Received `%s' request from client with target `%4s' and first message of type %u and total size %u\n",
555 "SEND", GNUNET_i2s (&obm->peer), ntohs (obmm->type), msize);
557 if (GNUNET_NO == GST_neighbours_test_connected (&obm->peer))
559 /* not connected, not allowed to send; can happen due to asynchronous operations */
561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
562 "Could not send message to peer `%s': not connected\n",
563 GNUNET_i2s (&obm->peer));
565 GNUNET_STATISTICS_update (GST_stats,
567 ("# bytes payload dropped (other peer was not connected)"),
569 GNUNET_SERVER_receive_done (client, GNUNET_OK);
572 GNUNET_SERVER_receive_done (client, GNUNET_OK);
573 stcc = GNUNET_malloc (sizeof (struct SendTransmitContinuationContext));
574 stcc->target = obm->peer;
575 stcc->client = client;
576 GNUNET_SERVER_client_keep (client);
577 GST_neighbours_send (&obm->peer, obmm, msize,
578 GNUNET_TIME_relative_ntoh (obm->timeout),
579 &handle_send_transmit_continuation, stcc);
584 * Try to initiate a connection to the given peer if the blacklist
587 * @param cls closure (unused, NULL)
588 * @param peer identity of peer that was tested
589 * @param result GNUNET_OK if the connection is allowed,
593 try_connect_if_allowed (void *cls, const struct GNUNET_PeerIdentity *peer,
596 if (GNUNET_OK != result)
597 return; /* not allowed */
598 GST_neighbours_try_connect (peer);
603 * Handle request connect message
605 * @param cls closure (always NULL)
606 * @param client identification of the client
607 * @param message the actual message
610 clients_handle_request_connect (void *cls, struct GNUNET_SERVER_Client *client,
611 const struct GNUNET_MessageHeader *message)
613 const struct TransportRequestConnectMessage *trcm =
614 (const struct TransportRequestConnectMessage *) message;
616 GNUNET_STATISTICS_update (GST_stats,
618 ("# REQUEST CONNECT messages received"), 1,
621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
622 "Received a request connect message for peer `%s'\n",
623 GNUNET_i2s (&trcm->peer));
625 (void) GST_blacklist_test_allowed (&trcm->peer, NULL, &try_connect_if_allowed,
627 GNUNET_SERVER_receive_done (client, GNUNET_OK);
632 * Client asked for a quota change for a particular peer. Process the request.
635 * @param client the client
636 * @param message the quota changing message
639 clients_handle_set_quota (void *cls, struct GNUNET_SERVER_Client *client,
640 const struct GNUNET_MessageHeader *message)
642 const struct QuotaSetMessage *qsm;
644 qsm = (const struct QuotaSetMessage *) message;
645 GNUNET_STATISTICS_update (GST_stats,
646 gettext_noop ("# SET QUOTA messages received"), 1,
649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
650 "Received `%s' request (new quota %u) from client for peer `%4s'\n",
651 "SET_QUOTA", (unsigned int) ntohl (qsm->quota.value__),
652 GNUNET_i2s (&qsm->peer));
654 GST_neighbours_set_incoming_quota (&qsm->peer, qsm->quota);
655 GNUNET_SERVER_receive_done (client, GNUNET_OK);
660 * Take the given address and append it to the set of results sent back to
663 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
664 * @param address the resolved name, NULL to indicate the last response
667 transmit_address_to_client (void *cls, const char *buf)
669 struct GNUNET_SERVER_TransmitContext *tc = cls;
673 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
674 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
675 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
678 GNUNET_SERVER_transmit_context_append_data (tc, buf, strlen (buf) + 1,
679 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
684 * Take the given address and append it to the set of results sent back to
687 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
688 * @param address the resolved name, NULL to indicate the last response
691 transmit_binary_to_client (void *cls, void *buf, size_t size)
693 struct GNUNET_SERVER_TransmitContext *tc = cls;
697 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
698 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
699 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
702 GNUNET_SERVER_transmit_context_append_data (tc, buf, size,
703 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
708 * Client asked to resolve an address. Process the request.
711 * @param client the client
712 * @param message the resolution request
715 clients_handle_address_lookup (void *cls, struct GNUNET_SERVER_Client *client,
716 const struct GNUNET_MessageHeader *message)
718 const struct AddressLookupMessage *alum;
719 struct GNUNET_TRANSPORT_PluginFunctions *papi;
720 const char *plugin_name;
722 uint32_t address_len;
724 struct GNUNET_SERVER_TransmitContext *tc;
725 struct GNUNET_TIME_Relative rtimeout;
728 size = ntohs (message->size);
729 if (size < sizeof (struct AddressLookupMessage))
732 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
735 alum = (const struct AddressLookupMessage *) message;
736 address_len = ntohl (alum->addrlen);
737 if (size <= sizeof (struct AddressLookupMessage) + address_len)
740 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
743 address = (const char *) &alum[1];
744 plugin_name = (const char *) &address[address_len];
745 if (plugin_name[size - sizeof (struct AddressLookupMessage) - address_len - 1]
749 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
752 rtimeout = GNUNET_TIME_relative_ntoh (alum->timeout);
753 numeric = ntohl (alum->numeric_only);
754 tc = GNUNET_SERVER_transmit_context_create (client);
755 papi = GST_plugins_find (plugin_name);
758 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
759 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
760 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
763 GNUNET_SERVER_disable_receive_done_warning (client);
764 papi->address_pretty_printer (papi->cls, plugin_name, address, address_len,
765 numeric, rtimeout, &transmit_address_to_client,
771 * Send an address to the client.
773 * @param cls our 'struct GNUNET_SERVER_TransmitContext' (for sending)
774 * @param public_key public key for the peer, never NULL
775 * @param target peer this change is about, never NULL
776 * @param valid_until until what time do we consider the address valid?
777 * @param validation_block is FOREVER if the address is for an unsupported plugin (from PEERINFO)
778 * is ZERO if the address is considered valid (no validation needed)
779 * is a time in the future if we're currently denying re-validation
780 * @param plugin_name name of the plugin
781 * @param plugin_address binary address
782 * @param plugin_address_len length of address
785 send_address_to_client (void *cls,
786 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
787 *public_key, const struct GNUNET_PeerIdentity *target,
788 struct GNUNET_TIME_Absolute valid_until,
789 struct GNUNET_TIME_Absolute validation_block,
790 const char *plugin_name, const void *plugin_address,
791 size_t plugin_address_len)
793 struct GNUNET_SERVER_TransmitContext *tc = cls;
796 /* FIXME: move to a binary format!!! */
797 GNUNET_asprintf (&addr_buf, "%s --- %s, %s",
798 GST_plugins_a2s (plugin_name, plugin_address,
801 GST_neighbours_test_connected (target)) ? "CONNECTED" :
803 (GNUNET_TIME_absolute_get_remaining (valid_until).rel_value >
804 0) ? "VALIDATED" : "UNVALIDATED");
805 transmit_address_to_client (tc, addr_buf);
806 GNUNET_free (addr_buf);
811 * Client asked to obtain information about a peer's addresses.
812 * Process the request.
813 * FIXME: use better name!
816 * @param client the client
817 * @param message the peer address information request
820 clients_handle_peer_address_lookup (void *cls,
821 struct GNUNET_SERVER_Client *client,
822 const struct GNUNET_MessageHeader *message)
824 const struct PeerAddressLookupMessage *peer_address_lookup;
825 struct GNUNET_SERVER_TransmitContext *tc;
827 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
828 GNUNET_break (ntohl (peer_address_lookup->reserved) == 0);
829 tc = GNUNET_SERVER_transmit_context_create (client);
830 GST_validation_get_addresses (&peer_address_lookup->peer,
831 &send_address_to_client, tc);
832 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
833 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
834 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
839 * Output the active address of connected neighbours to the given client.
841 * @param cls the 'struct GNUNET_SERVER_TransmitContext' for transmission to the client
842 * @param neighbour identity of the neighbour
843 * @param ats performance data
844 * @param ats_count number of entries in ats (excluding 0-termination)
845 * @param transport plugin
846 * @param addr address
847 * @param addrlen address length
850 output_addresses (void *cls, const struct GNUNET_PeerIdentity *peer,
851 const struct GNUNET_TRANSPORT_ATS_Information *ats,
853 const char * transport,
857 struct GNUNET_SERVER_TransmitContext *tc = cls;
858 struct AddressIterateResponseMessage * msg;
862 (sizeof (struct AddressIterateResponseMessage) + strlen(transport) + 1);
863 msg = GNUNET_malloc (size);
864 memcpy (&msg->peer, peer, sizeof (struct GNUNET_PeerIdentity));
865 memcpy (&msg[0], transport, strlen(transport)+1);
866 msg->addrlen = ntohs (addrlen);
867 msg->pluginlen = ntohs (strlen(transport)+1);
869 transmit_binary_to_client (tc, msg, size);
875 * Client asked to obtain information about all actively used addresses.
876 * Process the request. FIXME: use better name!
879 * @param client the client
880 * @param message the peer address information request
883 clients_handle_address_iterate (void *cls, struct GNUNET_SERVER_Client *client,
884 const struct GNUNET_MessageHeader *message)
886 struct GNUNET_SERVER_TransmitContext *tc;
888 GNUNET_SERVER_disable_receive_done_warning (client);
889 tc = GNUNET_SERVER_transmit_context_create (client);
890 GST_neighbours_iterate (&output_addresses, tc);
891 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
892 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
893 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
898 * Start handling requests from clients.
900 * @param server server used to accept clients from.
903 GST_clients_start (struct GNUNET_SERVER_Handle *server)
905 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
906 {&clients_handle_start, NULL,
907 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
908 {&clients_handle_hello, NULL,
909 GNUNET_MESSAGE_TYPE_HELLO, 0},
910 {&clients_handle_send, NULL,
911 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
912 {&clients_handle_request_connect, NULL,
913 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT,
914 sizeof (struct TransportRequestConnectMessage)},
915 {&clients_handle_set_quota, NULL,
916 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
917 {&clients_handle_address_lookup, NULL,
918 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP, 0},
919 {&clients_handle_peer_address_lookup, NULL,
920 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
921 sizeof (struct PeerAddressLookupMessage)},
922 {&clients_handle_address_iterate, NULL,
923 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
924 sizeof (struct AddressIterateMessage)},
925 {&GST_blacklist_handle_init, NULL,
926 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT,
927 sizeof (struct GNUNET_MessageHeader)},
928 {&GST_blacklist_handle_reply, NULL,
929 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY,
930 sizeof (struct BlacklistMessage)},
933 GNUNET_SERVER_add_handlers (server, handlers);
934 GNUNET_SERVER_disconnect_notify (server, &client_disconnect_notification,
940 * Stop processing clients.
950 * Broadcast the given message to all of our clients.
952 * @param msg message to broadcast
953 * @param may_drop GNUNET_YES if the message can be dropped
956 GST_clients_broadcast (const struct GNUNET_MessageHeader *msg, int may_drop)
958 struct TransportClient *tc;
960 for (tc = clients_head; tc != NULL; tc = tc->next)
961 unicast (tc, msg, may_drop);
966 * Send the given message to a particular client
968 * @param client target of the message
969 * @param msg message to transmit
970 * @param may_drop GNUNET_YES if the message can be dropped
973 GST_clients_unicast (struct GNUNET_SERVER_Client *client,
974 const struct GNUNET_MessageHeader *msg, int may_drop)
976 struct TransportClient *tc;
978 tc = lookup_client (client);
980 return; /* client got disconnected in the meantime, drop message */
981 unicast (tc, msg, may_drop);
985 /* end of file gnunet-service-transport_clients.c */