2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
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5 it under the terms of the GNU General Public License as published
6 by the Free Software Foundation; either version 3, or (at your
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10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 General Public License for more details.
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14 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
15 Boston, MA 02111-1307, USA.
19 * @file mesh/mesh_api.c
20 * @brief mesh api: client implementation of new mesh service
21 * @author Bartlomiej Polot
26 * - AUXILIARY FUNCTIONS
29 * - API CALL DEFINITIONS
31 * TODO: add regex to reconnect
34 #include "gnunet_util_lib.h"
35 #include "gnunet_mesh_service.h"
37 #include "mesh_protocol.h"
39 #define LOG(kind,...) GNUNET_log_from (kind, "mesh-api",__VA_ARGS__)
40 #define DEBUG_ACK GNUNET_YES
42 /******************************************************************************/
43 /************************ DATA STRUCTURES ****************************/
44 /******************************************************************************/
47 * Transmission queue to the service
49 struct GNUNET_MESH_TransmitHandle
55 struct GNUNET_MESH_TransmitHandle *next;
60 struct GNUNET_MESH_TransmitHandle *prev;
63 * Tunnel this message is sent on / for (may be NULL for control messages).
65 struct GNUNET_MESH_Tunnel *tunnel;
68 * Callback to obtain the message to transmit, or NULL if we
69 * got the message in 'data'. Notice that messages built
70 * by 'notify' need to be encapsulated with information about
73 GNUNET_CONNECTION_TransmitReadyNotify notify;
76 * Closure for 'notify'
81 * How long is this message valid. Once the timeout has been
82 * reached, the message must no longer be sent. If this
83 * is a message with a 'notify' callback set, the 'notify'
84 * function should be called with 'buf' NULL and size 0.
86 struct GNUNET_TIME_Absolute timeout;
89 * Task triggering a timeout, can be NO_TASK if the timeout is FOREVER.
91 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
94 * Size of 'data' -- or the desired size of 'notify' if 'data' is NULL.
101 * Opaque handle to the service.
103 struct GNUNET_MESH_Handle
107 * Handle to the server connection, to send messages later
109 struct GNUNET_CLIENT_Connection *client;
112 * Set of handlers used for processing incoming messages in the tunnels
114 const struct GNUNET_MESH_MessageHandler *message_handlers;
117 * Number of handlers in the handlers array.
119 unsigned int n_handlers;
124 const uint32_t *ports;
129 unsigned int n_ports;
132 * Double linked list of the tunnels this client is connected to, head.
134 struct GNUNET_MESH_Tunnel *tunnels_head;
137 * Double linked list of the tunnels this client is connected to, tail.
139 struct GNUNET_MESH_Tunnel *tunnels_tail;
142 * Callback for inbound tunnel creation
144 GNUNET_MESH_InboundTunnelNotificationHandler *new_tunnel;
147 * Callback for inbound tunnel disconnection
149 GNUNET_MESH_TunnelEndHandler *cleaner;
152 * Handle to cancel pending transmissions in case of disconnection
154 struct GNUNET_CLIENT_TransmitHandle *th;
157 * Closure for all the handlers given by the client
162 * Messages to send to the service, head.
164 struct GNUNET_MESH_TransmitHandle *th_head;
167 * Messages to send to the service, tail.
169 struct GNUNET_MESH_TransmitHandle *th_tail;
172 * tid of the next tunnel to create (to avoid reusing IDs often)
174 MESH_TunnelNumber next_tid;
177 * Have we started the task to receive messages from the service
178 * yet? We do this after we send the 'MESH_LOCAL_CONNECT' message.
183 * Configuration given by the client, in case of reconnection
185 const struct GNUNET_CONFIGURATION_Handle *cfg;
188 * Time to the next reconnect in case one reconnect fails
190 struct GNUNET_TIME_Relative reconnect_time;
193 * Task for trying to reconnect.
195 GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
200 GNUNET_MESH_TunnelsCB tunnels_cb;
203 * Monitor callback closure.
210 GNUNET_MESH_TunnelCB tunnel_cb;
213 * Tunnel callback closure.
218 unsigned int acks_sent;
219 unsigned int acks_recv;
225 * Description of a peer
227 struct GNUNET_MESH_Peer
230 * ID of the peer in short form
235 * Tunnel this peer belongs to
237 struct GNUNET_MESH_Tunnel *t;
240 * Flag indicating whether service has informed about its connection
241 * FIXME-BART: is this flag used? Seems dead right now...
249 * Opaque handle to a tunnel.
251 struct GNUNET_MESH_Tunnel
257 struct GNUNET_MESH_Tunnel *next;
262 struct GNUNET_MESH_Tunnel *prev;
265 * Handle to the mesh this tunnel belongs to
267 struct GNUNET_MESH_Handle *mesh;
270 * Local ID of the tunnel
272 MESH_TunnelNumber tid;
280 * Other end of the tunnel.
284 struct GNUNET_PeerIdentity pid;
287 * Any data the caller wants to put in here
292 * Size of packet queued in this tunnel
294 unsigned int packet_size;
297 * Is the tunnel allowed to buffer?
302 * Is the tunnel realiable?
307 * If reliable, is the tunnel out of order?
312 * Are we allowed to send to the service?
320 * Implementation state for mesh's message queue.
325 * The current transmit handle, or NULL
326 * if no transmit is active.
328 struct GNUNET_MESH_TransmitHandle *th;
331 * Tunnel to send the data over.
333 struct GNUNET_MESH_Tunnel *tunnel;
337 /******************************************************************************/
338 /*********************** DECLARATIONS *************************/
339 /******************************************************************************/
342 * Function called to send a message to the service.
343 * "buf" will be NULL and "size" zero if the socket was closed for writing in
346 * @param cls closure, the mesh handle
347 * @param size number of bytes available in buf
348 * @param buf where the callee should write the connect message
349 * @return number of bytes written to buf
352 send_callback (void *cls, size_t size, void *buf);
355 /******************************************************************************/
356 /*********************** AUXILIARY FUNCTIONS *************************/
357 /******************************************************************************/
360 * Check if transmission is a payload packet.
362 * @param th Transmission handle.
364 * @return GNUNET_YES if it is a payload packet,
365 * GNUNET_NO if it is a mesh management packet.
368 th_is_payload (struct GNUNET_MESH_TransmitHandle *th)
370 return (th->notify != NULL) ? GNUNET_YES : GNUNET_NO;
375 * Check whether there is any message ready in the queue and find the size.
377 * @param h Mesh handle.
379 * @return The size of the first ready message in the queue,
380 * 0 if there is none.
383 message_ready_size (struct GNUNET_MESH_Handle *h)
385 struct GNUNET_MESH_TransmitHandle *th;
386 struct GNUNET_MESH_Tunnel *t;
388 for (th = h->th_head; NULL != th; th = th->next)
391 if (GNUNET_NO == th_is_payload (th))
393 LOG (GNUNET_ERROR_TYPE_DEBUG, "# message internal\n");
396 if (GNUNET_YES == t->allow_send)
398 LOG (GNUNET_ERROR_TYPE_DEBUG, "# message payload ok\n");
407 * Get the tunnel handler for the tunnel specified by id from the given handle
408 * @param h Mesh handle
409 * @param tid ID of the wanted tunnel
410 * @return handle to the required tunnel or NULL if not found
412 static struct GNUNET_MESH_Tunnel *
413 retrieve_tunnel (struct GNUNET_MESH_Handle *h, MESH_TunnelNumber tid)
415 struct GNUNET_MESH_Tunnel *t;
429 * Create a new tunnel and insert it in the tunnel list of the mesh handle
430 * @param h Mesh handle
431 * @param tid desired tid of the tunnel, 0 to assign one automatically
432 * @return handle to the created tunnel
434 static struct GNUNET_MESH_Tunnel *
435 create_tunnel (struct GNUNET_MESH_Handle *h, MESH_TunnelNumber tid)
437 struct GNUNET_MESH_Tunnel *t;
439 t = GNUNET_malloc (sizeof (struct GNUNET_MESH_Tunnel));
440 GNUNET_CONTAINER_DLL_insert (h->tunnels_head, h->tunnels_tail, t);
444 t->tid = h->next_tid;
445 while (NULL != retrieve_tunnel (h, h->next_tid))
448 h->next_tid &= ~GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
449 h->next_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
456 t->allow_send = GNUNET_NO;
457 t->nobuffer = GNUNET_NO;
463 * Destroy the specified tunnel.
464 * - Destroys all peers, calling the disconnect callback on each if needed
465 * - Cancels all outgoing traffic for that tunnel, calling respective notifys
466 * - Calls cleaner if tunnel was inbound
467 * - Frees all memory used
469 * @param t Pointer to the tunnel.
470 * @param call_cleaner Whether to call the cleaner handler.
472 * @return Handle to the required tunnel or NULL if not found.
475 destroy_tunnel (struct GNUNET_MESH_Tunnel *t, int call_cleaner)
477 struct GNUNET_MESH_Handle *h;
478 struct GNUNET_MESH_TransmitHandle *th;
479 struct GNUNET_MESH_TransmitHandle *next;
486 LOG (GNUNET_ERROR_TYPE_DEBUG,
487 "destroy_tunnel %X\n",
491 GNUNET_CONTAINER_DLL_remove (h->tunnels_head, h->tunnels_tail, t);
493 /* signal tunnel destruction */
494 if ( (NULL != h->cleaner) && (0 != t->peer) && (GNUNET_YES == call_cleaner) )
495 h->cleaner (h->cls, t, t->ctx);
497 /* check that clients did not leave messages behind in the queue */
498 for (th = h->th_head; NULL != th; th = next)
503 /* Clients should have aborted their requests already.
504 * Management traffic should be ok, as clients can't cancel that */
505 GNUNET_break (GNUNET_NO == th_is_payload(th));
506 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
508 /* clean up request */
509 if (GNUNET_SCHEDULER_NO_TASK != th->timeout_task)
510 GNUNET_SCHEDULER_cancel (th->timeout_task);
514 /* if there are no more pending requests with mesh service, cancel active request */
515 /* Note: this should be unnecessary... */
516 if ((0 == message_ready_size (h)) && (NULL != h->th))
518 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
523 GNUNET_PEER_change_rc (t->peer, -1);
530 * Notify client that the transmission has timed out
533 * @param tc task context
536 timeout_transmission (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
538 struct GNUNET_MESH_TransmitHandle *th = cls;
539 struct GNUNET_MESH_Handle *mesh;
541 mesh = th->tunnel->mesh;
542 GNUNET_CONTAINER_DLL_remove (mesh->th_head, mesh->th_tail, th);
543 th->tunnel->packet_size = 0;
544 if (GNUNET_YES == th_is_payload (th))
545 th->notify (th->notify_cls, 0, NULL);
547 if ((0 == message_ready_size (mesh)) && (NULL != mesh->th))
549 /* nothing ready to transmit, no point in asking for transmission */
550 GNUNET_CLIENT_notify_transmit_ready_cancel (mesh->th);
557 * Add a transmit handle to the transmission queue and set the
560 * @param h mesh handle with the queue head and tail
561 * @param th handle to the packet to be transmitted
564 add_to_queue (struct GNUNET_MESH_Handle *h,
565 struct GNUNET_MESH_TransmitHandle *th)
567 GNUNET_CONTAINER_DLL_insert_tail (h->th_head, h->th_tail, th);
568 if (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us == th->timeout.abs_value_us)
571 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
572 (th->timeout), &timeout_transmission, th);
577 * Auxiliary function to send an already constructed packet to the service.
578 * Takes care of creating a new queue element, copying the message and
579 * calling the tmt_rdy function if necessary.
581 * @param h mesh handle
582 * @param msg message to transmit
583 * @param tunnel tunnel this send is related to (NULL if N/A)
586 send_packet (struct GNUNET_MESH_Handle *h,
587 const struct GNUNET_MessageHeader *msg,
588 struct GNUNET_MESH_Tunnel *tunnel);
592 * Send an ack on the tunnel to confirm the processing of a message.
594 * @param t Tunnel on which to send the ACK.
597 send_ack (struct GNUNET_MESH_Tunnel *t)
599 struct GNUNET_MESH_LocalAck msg;
601 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending ACK on tunnel %X\n", t->tid);
602 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
603 msg.header.size = htons (sizeof (msg));
604 msg.tunnel_id = htonl (t->tid);
607 t->mesh->acks_sent++;
610 send_packet (t->mesh, &msg.header, t);
617 * Reconnect callback: tries to reconnect again after a failer previous
619 * @param cls closure (mesh handle)
620 * @param tc task context
623 reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
627 * Send a connect packet to the service with the applications and types
628 * requested by the user.
630 * @param h The mesh handle.
634 send_connect (struct GNUNET_MESH_Handle *h)
638 size = sizeof (struct GNUNET_MESH_ClientConnect);
639 size += h->n_ports * sizeof (uint32_t);
641 char buf[size] GNUNET_ALIGN;
642 struct GNUNET_MESH_ClientConnect *msg;
646 /* build connection packet */
647 msg = (struct GNUNET_MESH_ClientConnect *) buf;
648 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT);
649 msg->header.size = htons (size);
650 ports = (uint32_t *) &msg[1];
651 for (i = 0; i < h->n_ports; i++)
653 ports[i] = htonl (h->ports[i]);
654 LOG (GNUNET_ERROR_TYPE_DEBUG, " port %u\n",
657 LOG (GNUNET_ERROR_TYPE_DEBUG,
658 "Sending %lu bytes long message with %u ports\n",
659 ntohs (msg->header.size), h->n_ports);
660 send_packet (h, &msg->header, NULL);
666 * Reconnect to the service, retransmit all infomation to try to restore the
669 * @param h handle to the mesh
671 * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
674 do_reconnect (struct GNUNET_MESH_Handle *h)
676 struct GNUNET_MESH_Tunnel *t;
678 LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
679 LOG (GNUNET_ERROR_TYPE_DEBUG, "******* RECONNECT *******\n");
680 LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
681 LOG (GNUNET_ERROR_TYPE_DEBUG, "******** on %p *******\n", h);
682 LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
687 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
690 if (NULL != h->client)
692 GNUNET_CLIENT_disconnect (h->client);
696 h->client = GNUNET_CLIENT_connect ("mesh", h->cfg);
697 if (h->client == NULL)
699 h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
702 GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
703 GNUNET_TIME_relative_multiply
704 (h->reconnect_time, 2));
705 LOG (GNUNET_ERROR_TYPE_DEBUG,
706 "Next retry in %s\n",
707 GNUNET_STRINGS_relative_time_to_string (h->reconnect_time,
714 h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
717 /* Rebuild all tunnels */
718 for (t = h->tunnels_head; NULL != t; t = t->next)
720 struct GNUNET_MESH_TunnelMessage tmsg;
723 if (t->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
725 /* Tunnel was created by service (incoming tunnel) */
726 /* TODO: Notify service of missing tunnel, to request
727 * creator to recreate path (find a path to him via DHT?)
731 t->allow_send = GNUNET_NO;
732 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
733 tmsg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
734 tmsg.tunnel_id = htonl (t->tid);
735 tmsg.port = htonl (t->port);
737 GNUNET_PEER_resolve (t->peer, &tmsg.peer);
740 if (GNUNET_YES == t->nobuffer)
741 options |= GNUNET_MESH_OPTION_NOBUFFER;
743 if (GNUNET_YES == t->reliable)
744 options |= GNUNET_MESH_OPTION_RELIABLE;
746 tmsg.opt = htonl (options);
747 send_packet (h, &tmsg.header, t);
753 * Reconnect callback: tries to reconnect again after a failer previous
755 * @param cls closure (mesh handle)
756 * @param tc task context
759 reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
761 struct GNUNET_MESH_Handle *h = cls;
763 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
764 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
771 * Reconnect to the service, retransmit all infomation to try to restore the
774 * @param h handle to the mesh
776 * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
779 reconnect (struct GNUNET_MESH_Handle *h)
781 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requested RECONNECT\n");
782 h->in_receive = GNUNET_NO;
783 if (GNUNET_SCHEDULER_NO_TASK == h->reconnect_task)
784 h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
789 /******************************************************************************/
790 /*********************** RECEIVE HANDLERS ****************************/
791 /******************************************************************************/
794 * Process the new tunnel notification and add it to the tunnels in the handle
796 * @param h The mesh handle
797 * @param msg A message with the details of the new incoming tunnel
800 process_tunnel_created (struct GNUNET_MESH_Handle *h,
801 const struct GNUNET_MESH_TunnelMessage *msg)
803 struct GNUNET_MESH_Tunnel *t;
804 MESH_TunnelNumber tid;
807 tid = ntohl (msg->tunnel_id);
808 port = ntohl (msg->port);
809 LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating incoming tunnel %X:%u\n", tid, port);
810 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
815 if (NULL != h->new_tunnel)
817 t = create_tunnel (h, tid);
818 t->allow_send = GNUNET_NO;
819 t->peer = GNUNET_PEER_intern (&msg->peer);
824 if (0 != (msg->opt & GNUNET_MESH_OPTION_NOBUFFER))
825 t->nobuffer = GNUNET_YES;
827 t->nobuffer = GNUNET_NO;
828 if (0 != (msg->opt & GNUNET_MESH_OPTION_RELIABLE))
829 t->reliable = GNUNET_YES;
831 t->reliable = GNUNET_NO;
832 if (GNUNET_YES == t->reliable &&
833 0 != (msg->opt & GNUNET_MESH_OPTION_OOORDER))
834 t->ooorder = GNUNET_YES;
836 t->ooorder = GNUNET_NO;
837 LOG (GNUNET_ERROR_TYPE_DEBUG, " created tunnel %p\n", t);
838 t->ctx = h->new_tunnel (h->cls, t, &msg->peer, t->port);
839 LOG (GNUNET_ERROR_TYPE_DEBUG, "User notified\n");
843 struct GNUNET_MESH_TunnelMessage d_msg;
845 LOG (GNUNET_ERROR_TYPE_DEBUG, "No handler for incoming tunnels\n");
847 d_msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
848 d_msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
849 d_msg.tunnel_id = msg->tunnel_id;
850 memset (&d_msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
854 send_packet (h, &d_msg.header, NULL);
861 * Process the tunnel destroy notification and free associated resources
863 * @param h The mesh handle
864 * @param msg A message with the details of the tunnel being destroyed
867 process_tunnel_destroy (struct GNUNET_MESH_Handle *h,
868 const struct GNUNET_MESH_TunnelMessage *msg)
870 struct GNUNET_MESH_Tunnel *t;
871 MESH_TunnelNumber tid;
873 LOG (GNUNET_ERROR_TYPE_DEBUG, "Destroying tunnel from service\n");
874 tid = ntohl (msg->tunnel_id);
875 t = retrieve_tunnel (h, tid);
879 LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X unknown\n", tid);
882 LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X destroyed\n", t->tid);
883 destroy_tunnel (t, GNUNET_YES);
888 * Process the incoming data packets, call appropriate handlers.
890 * @param h The mesh handle
891 * @param message A message encapsulating the data
894 process_incoming_data (struct GNUNET_MESH_Handle *h,
895 const struct GNUNET_MessageHeader *message)
897 const struct GNUNET_MessageHeader *payload;
898 const struct GNUNET_MESH_MessageHandler *handler;
899 struct GNUNET_MESH_LocalData *dmsg;
900 struct GNUNET_MESH_Tunnel *t;
904 LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a data message!\n");
906 dmsg = (struct GNUNET_MESH_LocalData *) message;
908 t = retrieve_tunnel (h, ntohl (dmsg->tid));
909 payload = (struct GNUNET_MessageHeader *) &dmsg[1];
912 /* Tunnel was ignored/destroyed, probably service didn't get it yet */
913 LOG (GNUNET_ERROR_TYPE_DEBUG, " ignored!\n");
916 LOG (GNUNET_ERROR_TYPE_DEBUG,
917 " %s data on tunnel %s [%X]\n",
918 t->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? "fwd" : "bck",
919 GNUNET_i2s (GNUNET_PEER_resolve2(t->peer)),
921 type = ntohs (payload->type);
922 LOG (GNUNET_ERROR_TYPE_DEBUG, " payload type %u\n", type);
923 for (i = 0; i < h->n_handlers; i++)
925 handler = &h->message_handlers[i];
926 LOG (GNUNET_ERROR_TYPE_DEBUG,
927 " checking handler for type %u\n",
929 if (handler->type == type)
932 handler->callback (h->cls, t, &t->ctx, payload))
934 LOG (GNUNET_ERROR_TYPE_DEBUG, "callback caused disconnection\n");
935 GNUNET_MESH_tunnel_destroy (t);
940 LOG (GNUNET_ERROR_TYPE_DEBUG,
941 "callback completed successfully\n");
949 * Process a local ACK message, enabling the client to send
950 * more data to the service.
952 * @param h Mesh handle.
953 * @param message Message itself.
956 process_ack (struct GNUNET_MESH_Handle *h,
957 const struct GNUNET_MessageHeader *message)
959 struct GNUNET_MESH_LocalAck *msg;
960 struct GNUNET_MESH_Tunnel *t;
961 MESH_TunnelNumber tid;
963 LOG (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK!\n");
965 msg = (struct GNUNET_MESH_LocalAck *) message;
966 tid = ntohl (msg->tunnel_id);
967 t = retrieve_tunnel (h, tid);
970 LOG (GNUNET_ERROR_TYPE_WARNING, "ACK on unknown tunnel %X\n", tid);
973 LOG (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X!\n", t->tid);
974 t->allow_send = GNUNET_YES;
975 if (NULL == h->th && 0 < t->packet_size)
977 LOG (GNUNET_ERROR_TYPE_DEBUG, " tmt rdy was NULL, requesting!\n");
979 GNUNET_CLIENT_notify_transmit_ready (h->client, t->packet_size,
980 GNUNET_TIME_UNIT_FOREVER_REL,
981 GNUNET_YES, &send_callback, h);
987 * Process a local reply about info on all tunnels, pass info to the user.
989 * @param h Mesh handle.
990 * @param message Message itself.
993 process_get_tunnels (struct GNUNET_MESH_Handle *h,
994 const struct GNUNET_MessageHeader *message)
996 struct GNUNET_MESH_LocalMonitor *msg;
998 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Get Tunnels messasge received\n");
1000 if (NULL == h->tunnels_cb)
1002 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
1006 msg = (struct GNUNET_MESH_LocalMonitor *) message;
1007 if (ntohs (message->size) !=
1008 (sizeof (struct GNUNET_MESH_LocalMonitor) +
1009 sizeof (struct GNUNET_PeerIdentity)))
1011 GNUNET_break_op (0);
1012 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1013 "Get tunnels message: size %hu - expected %u\n",
1014 ntohs (message->size),
1015 sizeof (struct GNUNET_MESH_LocalMonitor));
1018 h->tunnels_cb (h->tunnels_cls,
1019 ntohl (msg->tunnel_id),
1027 * Process a local monitor_tunnel reply, pass info to the user.
1029 * @param h Mesh handle.
1030 * @param message Message itself.
1033 process_show_tunnel (struct GNUNET_MESH_Handle *h,
1034 const struct GNUNET_MessageHeader *message)
1036 struct GNUNET_MESH_LocalMonitor *msg;
1039 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Show Tunnel messasge received\n");
1041 if (NULL == h->tunnel_cb)
1043 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
1047 /* Verify message sanity */
1048 msg = (struct GNUNET_MESH_LocalMonitor *) message;
1049 esize = sizeof (struct GNUNET_MESH_LocalMonitor);
1050 if (ntohs (message->size) != esize)
1052 GNUNET_break_op (0);
1053 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1054 "Show tunnel message: size %hu - expected %u\n",
1055 ntohs (message->size),
1058 h->tunnel_cb (h->tunnel_cls, NULL, NULL);
1059 h->tunnel_cb = NULL;
1060 h->tunnel_cls = NULL;
1065 h->tunnel_cb (h->tunnel_cls,
1072 * Function to process all messages received from the service
1074 * @param cls closure
1075 * @param msg message received, NULL on timeout or fatal error
1078 msg_received (void *cls, const struct GNUNET_MessageHeader *msg)
1080 struct GNUNET_MESH_Handle *h = cls;
1085 LOG (GNUNET_ERROR_TYPE_DEBUG,
1086 "Mesh service disconnected, reconnecting\n", h);
1090 type = ntohs (msg->type);
1091 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
1092 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received a message: %s\n",
1093 GNUNET_MESH_DEBUG_M2S (type));
1096 /* Notify of a new incoming tunnel */
1097 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE:
1098 process_tunnel_created (h, (struct GNUNET_MESH_TunnelMessage *) msg);
1100 /* Notify of a tunnel disconnection */
1101 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY:
1102 process_tunnel_destroy (h, (struct GNUNET_MESH_TunnelMessage *) msg);
1104 /* Notify of a new data packet in the tunnel */
1105 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA:
1106 process_incoming_data (h, msg);
1108 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1109 process_ack (h, msg);
1111 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS:
1112 process_get_tunnels (h, msg);
1114 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL:
1115 process_show_tunnel (h, msg);
1118 /* We shouldn't get any other packages, log and ignore */
1119 LOG (GNUNET_ERROR_TYPE_WARNING,
1120 "unsolicited message form service (type %s)\n",
1121 GNUNET_MESH_DEBUG_M2S (ntohs (msg->type)));
1123 LOG (GNUNET_ERROR_TYPE_DEBUG, "message processed\n");
1124 if (GNUNET_YES == h->in_receive)
1126 GNUNET_CLIENT_receive (h->client, &msg_received, h,
1127 GNUNET_TIME_UNIT_FOREVER_REL);
1131 LOG (GNUNET_ERROR_TYPE_DEBUG,
1132 "in receive off, not calling CLIENT_receive\n");
1137 /******************************************************************************/
1138 /************************ SEND FUNCTIONS ****************************/
1139 /******************************************************************************/
1142 * Function called to send a message to the service.
1143 * "buf" will be NULL and "size" zero if the socket was closed for writing in
1146 * @param cls closure, the mesh handle
1147 * @param size number of bytes available in buf
1148 * @param buf where the callee should write the connect message
1149 * @return number of bytes written to buf
1152 send_callback (void *cls, size_t size, void *buf)
1154 struct GNUNET_MESH_Handle *h = cls;
1155 struct GNUNET_MESH_TransmitHandle *th;
1156 struct GNUNET_MESH_TransmitHandle *next;
1157 struct GNUNET_MESH_Tunnel *t;
1163 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
1164 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() Buffer %u\n", size);
1165 if ((0 == size) || (NULL == buf))
1167 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Received NULL send callback on %p\n", h);
1174 nsize = message_ready_size (h);
1175 while ((NULL != (th = next)) && (0 < nsize) && (size >= nsize))
1178 if (GNUNET_YES == th_is_payload (th))
1180 struct GNUNET_MESH_LocalData *dmsg;
1181 struct GNUNET_MessageHeader *mh;
1183 LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload\n");
1184 if (GNUNET_NO == t->allow_send)
1186 /* This tunnel is not ready to transmit yet, try next message */
1191 GNUNET_assert (size >= th->size);
1192 dmsg = (struct GNUNET_MESH_LocalData *) cbuf;
1193 mh = (struct GNUNET_MessageHeader *) &dmsg[1];
1194 psize = th->notify (th->notify_cls,
1195 size - sizeof (struct GNUNET_MESH_LocalData),
1199 psize += sizeof (struct GNUNET_MESH_LocalData);
1200 GNUNET_assert (size >= psize);
1201 dmsg->header.size = htons (psize);
1202 dmsg->tid = htonl (t->tid);
1203 dmsg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
1204 LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload type %s\n",
1205 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
1206 t->allow_send = GNUNET_NO;
1210 LOG (GNUNET_ERROR_TYPE_DEBUG,
1211 "# callback returned size 0, "
1212 "application canceled transmission\n");
1217 struct GNUNET_MessageHeader *mh = (struct GNUNET_MessageHeader *) &th[1];
1219 LOG (GNUNET_ERROR_TYPE_DEBUG, "# mesh internal traffic, type %s\n",
1220 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
1221 memcpy (cbuf, &th[1], th->size);
1224 if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1225 GNUNET_SCHEDULER_cancel (th->timeout_task);
1226 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
1229 nsize = message_ready_size (h);
1234 LOG (GNUNET_ERROR_TYPE_DEBUG, "# total size: %u\n", tsize);
1236 size = message_ready_size (h);
1239 LOG (GNUNET_ERROR_TYPE_DEBUG, "# next size: %u\n", size);
1241 GNUNET_CLIENT_notify_transmit_ready (h->client, size,
1242 GNUNET_TIME_UNIT_FOREVER_REL,
1243 GNUNET_YES, &send_callback, h);
1247 if (NULL != h->th_head)
1248 LOG (GNUNET_ERROR_TYPE_DEBUG, "# can't transmit any more\n");
1250 LOG (GNUNET_ERROR_TYPE_DEBUG, "# nothing left to transmit\n");
1252 if (GNUNET_NO == h->in_receive)
1254 LOG (GNUNET_ERROR_TYPE_DEBUG, "# start receiving from service\n");
1255 h->in_receive = GNUNET_YES;
1256 GNUNET_CLIENT_receive (h->client, &msg_received, h,
1257 GNUNET_TIME_UNIT_FOREVER_REL);
1259 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() END\n");
1265 * Auxiliary function to send an already constructed packet to the service.
1266 * Takes care of creating a new queue element, copying the message and
1267 * calling the tmt_rdy function if necessary.
1269 * @param h mesh handle
1270 * @param msg message to transmit
1271 * @param tunnel tunnel this send is related to (NULL if N/A)
1274 send_packet (struct GNUNET_MESH_Handle *h,
1275 const struct GNUNET_MessageHeader *msg,
1276 struct GNUNET_MESH_Tunnel *tunnel)
1278 struct GNUNET_MESH_TransmitHandle *th;
1281 LOG (GNUNET_ERROR_TYPE_DEBUG, " Sending message to service: %s\n",
1282 GNUNET_MESH_DEBUG_M2S(ntohs(msg->type)));
1283 msize = ntohs (msg->size);
1284 th = GNUNET_malloc (sizeof (struct GNUNET_MESH_TransmitHandle) + msize);
1285 th->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
1287 th->tunnel = tunnel;
1288 memcpy (&th[1], msg, msize);
1289 add_to_queue (h, th);
1290 LOG (GNUNET_ERROR_TYPE_DEBUG, " queued\n");
1293 LOG (GNUNET_ERROR_TYPE_DEBUG, " calling ntfy tmt rdy for %u bytes\n", msize);
1295 GNUNET_CLIENT_notify_transmit_ready (h->client, msize,
1296 GNUNET_TIME_UNIT_FOREVER_REL,
1297 GNUNET_YES, &send_callback, h);
1301 /******************************************************************************/
1302 /********************** API CALL DEFINITIONS *************************/
1303 /******************************************************************************/
1305 struct GNUNET_MESH_Handle *
1306 GNUNET_MESH_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls,
1307 GNUNET_MESH_InboundTunnelNotificationHandler new_tunnel,
1308 GNUNET_MESH_TunnelEndHandler cleaner,
1309 const struct GNUNET_MESH_MessageHandler *handlers,
1310 const uint32_t *ports)
1312 struct GNUNET_MESH_Handle *h;
1314 LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_MESH_connect()\n");
1315 h = GNUNET_malloc (sizeof (struct GNUNET_MESH_Handle));
1316 LOG (GNUNET_ERROR_TYPE_DEBUG, " addr %p\n", h);
1318 h->new_tunnel = new_tunnel;
1319 h->cleaner = cleaner;
1320 h->client = GNUNET_CLIENT_connect ("mesh", cfg);
1321 if (h->client == NULL)
1328 h->message_handlers = handlers;
1330 h->next_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
1331 h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
1332 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
1334 if (NULL != ports && ports[0] != 0 && NULL == new_tunnel)
1337 LOG (GNUNET_ERROR_TYPE_DEBUG,
1338 "no new tunnel handler given, ports parameter is useless!!\n");
1340 if ((NULL == ports || ports[0] == 0) && NULL != new_tunnel)
1343 LOG (GNUNET_ERROR_TYPE_DEBUG,
1344 "no ports given, new tunnel handler will never be called!!\n");
1346 /* count handlers */
1347 for (h->n_handlers = 0;
1348 handlers && handlers[h->n_handlers].type;
1350 for (h->n_ports = 0;
1351 ports && ports[h->n_ports];
1354 LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_MESH_connect() END\n");
1360 GNUNET_MESH_disconnect (struct GNUNET_MESH_Handle *handle)
1362 struct GNUNET_MESH_Tunnel *t;
1363 struct GNUNET_MESH_Tunnel *aux;
1364 struct GNUNET_MESH_TransmitHandle *th;
1366 LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH DISCONNECT\n");
1369 LOG (GNUNET_ERROR_TYPE_INFO, "Sent %d ACKs\n", handle->acks_sent);
1370 LOG (GNUNET_ERROR_TYPE_INFO, "Recv %d ACKs\n\n", handle->acks_recv);
1373 t = handle->tunnels_head;
1377 if (t->tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1380 LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X not destroyed\n", t->tid);
1382 destroy_tunnel (t, GNUNET_YES);
1385 while ( (th = handle->th_head) != NULL)
1387 struct GNUNET_MessageHeader *msg;
1389 /* Make sure it is an allowed packet (everything else should have been
1390 * already canceled).
1392 GNUNET_break (GNUNET_NO == th_is_payload (th));
1393 msg = (struct GNUNET_MessageHeader *) &th[1];
1394 switch (ntohs(msg->type))
1396 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT:
1397 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY:
1398 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS:
1399 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL:
1403 LOG (GNUNET_ERROR_TYPE_ERROR, "unexpected msg %u\n",
1407 GNUNET_CONTAINER_DLL_remove (handle->th_head, handle->th_tail, th);
1411 if (NULL != handle->th)
1413 GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
1416 if (NULL != handle->client)
1418 GNUNET_CLIENT_disconnect (handle->client);
1419 handle->client = NULL;
1421 if (GNUNET_SCHEDULER_NO_TASK != handle->reconnect_task)
1423 GNUNET_SCHEDULER_cancel(handle->reconnect_task);
1424 handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
1426 GNUNET_free (handle);
1431 * Create a new tunnel (we're initiator and will be allowed to add/remove peers
1432 * and to broadcast).
1434 * @param h mesh handle
1435 * @param tunnel_ctx client's tunnel context to associate with the tunnel
1436 * @param peer peer identity the tunnel should go to
1437 * @param port Port number.
1438 * @param nobuffer Flag for disabling buffering on relay nodes.
1439 * @param reliable Flag for end-to-end reliability.
1441 * @return handle to the tunnel
1443 struct GNUNET_MESH_Tunnel *
1444 GNUNET_MESH_tunnel_create (struct GNUNET_MESH_Handle *h,
1446 const struct GNUNET_PeerIdentity *peer,
1451 struct GNUNET_MESH_Tunnel *t;
1452 struct GNUNET_MESH_TunnelMessage msg;
1454 LOG (GNUNET_ERROR_TYPE_DEBUG,
1455 "Creating new tunnel to %s:%u\n",
1456 GNUNET_i2s (peer), port);
1457 t = create_tunnel (h, 0);
1458 LOG (GNUNET_ERROR_TYPE_DEBUG, " at %p\n", t);
1459 LOG (GNUNET_ERROR_TYPE_DEBUG, " number %X\n", t->tid);
1460 t->ctx = tunnel_ctx;
1461 t->peer = GNUNET_PEER_intern (peer);
1463 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1464 msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1465 msg.tunnel_id = htonl (t->tid);
1466 msg.port = htonl (port);
1469 if (GNUNET_YES == reliable)
1470 msg.opt |= GNUNET_MESH_OPTION_RELIABLE;
1471 if (GNUNET_YES == nobuffer)
1472 msg.opt |= GNUNET_MESH_OPTION_NOBUFFER;
1473 msg.opt = htonl (msg.opt);
1475 send_packet (h, &msg.header, t);
1481 GNUNET_MESH_tunnel_destroy (struct GNUNET_MESH_Tunnel *tunnel)
1483 struct GNUNET_MESH_Handle *h;
1484 struct GNUNET_MESH_TunnelMessage msg;
1485 struct GNUNET_MESH_TransmitHandle *th;
1487 LOG (GNUNET_ERROR_TYPE_DEBUG, "Destroying tunnel\n");
1490 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1491 msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1492 msg.tunnel_id = htonl (tunnel->tid);
1493 memset (&msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
1499 struct GNUNET_MESH_TransmitHandle *aux;
1500 if (th->tunnel == tunnel)
1503 /* FIXME call the handler? */
1504 if (GNUNET_YES == th_is_payload (th))
1505 th->notify (th->notify_cls, 0, NULL);
1506 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
1514 destroy_tunnel (tunnel, GNUNET_YES);
1515 send_packet (h, &msg.header, NULL);
1520 * Get information about a tunnel.
1522 * @param tunnel Tunnel handle.
1523 * @param option Query (GNUNET_MESH_OPTION_*).
1524 * @param ... dependant on option, currently not used
1526 * @return Union with an answer to the query.
1528 const union GNUNET_MESH_TunnelInfo *
1529 GNUNET_MESH_tunnel_get_info (struct GNUNET_MESH_Tunnel *tunnel,
1530 enum MeshTunnelOption option, ...)
1532 const union GNUNET_MESH_TunnelInfo *ret;
1536 case GNUNET_MESH_OPTION_NOBUFFER:
1537 ret = (const union GNUNET_MESH_TunnelInfo *) &tunnel->nobuffer;
1539 case GNUNET_MESH_OPTION_RELIABLE:
1540 ret = (const union GNUNET_MESH_TunnelInfo *) &tunnel->reliable;
1542 case GNUNET_MESH_OPTION_OOORDER:
1543 ret = (const union GNUNET_MESH_TunnelInfo *) &tunnel->ooorder;
1545 case GNUNET_MESH_OPTION_PEER:
1546 ret = (const union GNUNET_MESH_TunnelInfo *) &tunnel->pid;
1556 struct GNUNET_MESH_TransmitHandle *
1557 GNUNET_MESH_notify_transmit_ready (struct GNUNET_MESH_Tunnel *tunnel, int cork,
1558 struct GNUNET_TIME_Relative maxdelay,
1560 GNUNET_CONNECTION_TransmitReadyNotify notify,
1563 struct GNUNET_MESH_TransmitHandle *th;
1565 GNUNET_assert (NULL != tunnel);
1566 LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH NOTIFY TRANSMIT READY\n");
1567 LOG (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tunnel->tid);
1568 LOG (GNUNET_ERROR_TYPE_DEBUG, " allow_send %d\n", tunnel->allow_send);
1569 if (tunnel->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1570 LOG (GNUNET_ERROR_TYPE_DEBUG, " to origin\n");
1572 LOG (GNUNET_ERROR_TYPE_DEBUG, " to destination\n");
1573 LOG (GNUNET_ERROR_TYPE_DEBUG, " payload size %u\n", notify_size);
1574 GNUNET_assert (NULL != notify);
1575 GNUNET_assert (0 == tunnel->packet_size); // Only one data packet allowed
1576 th = GNUNET_malloc (sizeof (struct GNUNET_MESH_TransmitHandle));
1577 th->tunnel = tunnel;
1578 th->timeout = GNUNET_TIME_relative_to_absolute (maxdelay);
1579 th->size = notify_size + sizeof (struct GNUNET_MESH_LocalData);
1580 tunnel->packet_size = th->size;
1581 LOG (GNUNET_ERROR_TYPE_DEBUG, " total size %u\n", th->size);
1582 th->notify = notify;
1583 th->notify_cls = notify_cls;
1584 add_to_queue (tunnel->mesh, th);
1585 if (NULL != tunnel->mesh->th)
1587 if (GNUNET_NO == tunnel->allow_send)
1589 LOG (GNUNET_ERROR_TYPE_DEBUG, " call client notify tmt rdy\n");
1591 GNUNET_CLIENT_notify_transmit_ready (tunnel->mesh->client, th->size,
1592 GNUNET_TIME_UNIT_FOREVER_REL,
1593 GNUNET_YES, &send_callback,
1595 LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH NOTIFY TRANSMIT READY END\n");
1601 GNUNET_MESH_notify_transmit_ready_cancel (struct GNUNET_MESH_TransmitHandle *th)
1603 struct GNUNET_MESH_Handle *mesh;
1605 th->tunnel->packet_size = 0;
1606 mesh = th->tunnel->mesh;
1607 if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1608 GNUNET_SCHEDULER_cancel (th->timeout_task);
1609 GNUNET_CONTAINER_DLL_remove (mesh->th_head, mesh->th_tail, th);
1611 if ((0 == message_ready_size (mesh)) && (NULL != mesh->th))
1613 /* queue empty, no point in asking for transmission */
1614 GNUNET_CLIENT_notify_transmit_ready_cancel (mesh->th);
1620 GNUNET_MESH_receive_done (struct GNUNET_MESH_Tunnel *tunnel)
1627 * Request information about the running mesh peer.
1628 * The callback will be called for every tunnel known to the service,
1629 * listing all active peers that blong to the tunnel.
1631 * If called again on the same handle, it will overwrite the previous
1632 * callback and cls. To retrieve the cls, monitor_cancel must be
1635 * WARNING: unstable API, likely to change in the future!
1637 * @param h Handle to the mesh peer.
1638 * @param callback Function to call with the requested data.
1639 * @param callback_cls Closure for @c callback.
1642 GNUNET_MESH_get_tunnels (struct GNUNET_MESH_Handle *h,
1643 GNUNET_MESH_TunnelsCB callback,
1646 struct GNUNET_MessageHeader msg;
1648 msg.size = htons (sizeof (msg));
1649 msg.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
1650 send_packet (h, &msg, NULL);
1651 h->tunnels_cb = callback;
1652 h->tunnels_cls = callback_cls;
1659 * Cancel a monitor request. The monitor callback will not be called.
1661 * @param h Mesh handle.
1663 * @return Closure given to GNUNET_MESH_monitor, if any.
1666 GNUNET_MESH_get_tunnels_cancel (struct GNUNET_MESH_Handle *h)
1670 cls = h->tunnels_cls;
1671 h->tunnels_cb = NULL;
1672 h->tunnels_cls = NULL;
1678 * Request information about a specific tunnel of the running mesh peer.
1680 * WARNING: unstable API, likely to change in the future!
1681 * FIXME Add destination option.
1683 * @param h Handle to the mesh peer.
1684 * @param initiator ID of the owner of the tunnel.
1685 * @param tunnel_number Tunnel number.
1686 * @param callback Function to call with the requested data.
1687 * @param callback_cls Closure for @c callback.
1690 GNUNET_MESH_show_tunnel (struct GNUNET_MESH_Handle *h,
1691 struct GNUNET_PeerIdentity *initiator,
1692 unsigned int tunnel_number,
1693 GNUNET_MESH_TunnelCB callback,
1696 struct GNUNET_MESH_LocalMonitor msg;
1698 msg.header.size = htons (sizeof (msg));
1699 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL);
1700 msg.owner = *initiator;
1701 msg.tunnel_id = htonl (tunnel_number);
1703 send_packet (h, &msg.header, NULL);
1704 h->tunnel_cb = callback;
1705 h->tunnel_cls = callback_cls;
1712 * Function called to notify a client about the connection
1713 * begin ready to queue more data. "buf" will be
1714 * NULL and "size" zero if the connection was closed for
1715 * writing in the meantime.
1717 * @param cls closure
1718 * @param size number of bytes available in buf
1719 * @param buf where the callee should write the message
1720 * @return number of bytes written to buf
1723 mesh_mq_ntr (void *cls, size_t size,
1726 struct GNUNET_MQ_Handle *mq = cls;
1727 struct MeshMQState *state = GNUNET_MQ_impl_state (mq);
1728 const struct GNUNET_MessageHeader *msg = GNUNET_MQ_impl_current (mq);
1731 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "mesh-mq",
1732 "writing message (t: %u, s: %u) to buffer\n",
1733 ntohs (msg->type), ntohs (msg->size));
1738 GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_WRITE);
1741 msize = ntohs (msg->size);
1742 GNUNET_assert (msize <= size);
1743 memcpy (buf, msg, msize);
1744 GNUNET_MQ_impl_send_continue (mq);
1750 * Signature of functions implementing the
1751 * sending functionality of a message queue.
1753 * @param mq the message queue
1754 * @param msg the message to send
1755 * @param impl_state state of the implementation
1758 mesh_mq_send_impl (struct GNUNET_MQ_Handle *mq,
1759 const struct GNUNET_MessageHeader *msg, void *impl_state)
1761 struct MeshMQState *state = impl_state;
1763 GNUNET_assert (NULL == state->th);
1764 GNUNET_MQ_impl_send_commit (mq);
1765 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "mesh-mq",
1766 "calling ntr for message (t: %u, s: %u)\n",
1767 ntohs (msg->type), ntohs (msg->size));
1769 GNUNET_MESH_notify_transmit_ready (state->tunnel,
1770 /* FIXME: add option for corking */
1772 GNUNET_TIME_UNIT_FOREVER_REL,
1780 * Signature of functions implementing the
1781 * destruction of a message queue.
1782 * Implementations must not free 'mq', but should
1783 * take care of 'impl_state'.
1785 * @param mq the message queue to destroy
1786 * @param impl_state state of the implementation
1789 mesh_mq_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
1791 struct MeshMQState *state = impl_state;
1793 if (NULL != state->th)
1794 GNUNET_MESH_notify_transmit_ready_cancel (state->th);
1796 GNUNET_free (state);
1801 * Create a message queue for a mesh tunnel.
1802 * The message queue can only be used to transmit messages,
1803 * not to receive them.
1805 * @param tunnel the tunnel to create the message qeue for
1806 * @return a message queue to messages over the tunnel
1808 struct GNUNET_MQ_Handle *
1809 GNUNET_MESH_mq_create (struct GNUNET_MESH_Tunnel *tunnel)
1811 struct GNUNET_MQ_Handle *mq;
1812 struct MeshMQState *state;
1814 state = GNUNET_new (struct MeshMQState);
1815 state->tunnel = tunnel;
1817 mq = GNUNET_MQ_queue_for_callbacks (mesh_mq_send_impl,
1818 mesh_mq_destroy_impl,
1819 NULL, /* FIXME: cancel impl. */
1821 NULL, /* no msg handlers */
1822 NULL, /* no err handlers */
1823 NULL); /* no handler cls */