2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
4 GNUnet is free software; you can redistribute it and/or modify
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
7 option) any later version.
8 GNUnet is distributed in the hope that it will be useful, but
9 WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 General Public License for more details.
12 You should have received a copy of the GNU General Public License
13 along with GNUnet; see the file COPYING. If not, write to the
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 mesh service
21 * @author Bartlomiej Polot
26 * - AUXILIARY FUNCTIONS
29 * - API CALL DEFINITIONS
34 #if 0 /* keep Emacsens' auto-indent happy */
40 #include "gnunet_common.h"
41 #include "gnunet_client_lib.h"
42 #include "gnunet_util_lib.h"
43 #include "gnunet_peer_lib.h"
44 #include "gnunet_mesh_service.h"
46 #include "mesh_protocol.h"
48 #define MESH_API_DEBUG GNUNET_YES
50 #define LOG(kind,...) GNUNET_log_from (kind, "mesh-api",__VA_ARGS__)
52 /******************************************************************************/
53 /************************ DATA STRUCTURES ****************************/
54 /******************************************************************************/
57 * Transmission queue to the service
59 struct GNUNET_MESH_TransmitHandle
65 struct GNUNET_MESH_TransmitHandle *next;
70 struct GNUNET_MESH_TransmitHandle *prev;
73 * Tunnel this message is sent on / for (may be NULL for control messages).
75 struct GNUNET_MESH_Tunnel *tunnel;
78 * Callback to obtain the message to transmit, or NULL if we
79 * got the message in 'data'. Notice that messages built
80 * by 'notify' need to be encapsulated with information about
83 GNUNET_CONNECTION_TransmitReadyNotify notify;
86 * Closure for 'notify'
91 * How long is this message valid. Once the timeout has been
92 * reached, the message must no longer be sent. If this
93 * is a message with a 'notify' callback set, the 'notify'
94 * function should be called with 'buf' NULL and size 0.
96 struct GNUNET_TIME_Absolute timeout;
99 * Task triggering a timeout, can be NO_TASK if the timeout is FOREVER.
101 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
104 * Priority of the message. The queue is sorted by priority,
105 * control messages have the maximum priority (UINT32_MAX).
110 * Target of the message, 0 for multicast. This field
111 * is only valid if 'notify' is non-NULL.
113 GNUNET_PEER_Id target;
116 * Size of 'data' -- or the desired size of 'notify' if 'data' is NULL.
123 * Opaque handle to the service.
125 struct GNUNET_MESH_Handle
129 * Handle to the server connection, to send messages later
131 struct GNUNET_CLIENT_Connection *client;
134 * Set of handlers used for processing incoming messages in the tunnels
136 const struct GNUNET_MESH_MessageHandler *message_handlers;
139 * Set of applications that should be claimed to be offered at this node.
140 * Note that this is just informative, the appropiate handlers must be
141 * registered independently and the mapping is up to the developer of the
142 * client application.
144 const GNUNET_MESH_ApplicationType *applications;
147 * Double linked list of the tunnels this client is connected to.
149 struct GNUNET_MESH_Tunnel *tunnels_head;
150 struct GNUNET_MESH_Tunnel *tunnels_tail;
153 * Callback for inbound tunnel creation
155 GNUNET_MESH_InboundTunnelNotificationHandler *new_tunnel;
158 * Callback for inbound tunnel disconnection
160 GNUNET_MESH_TunnelEndHandler *cleaner;
163 * Handle to cancel pending transmissions in case of disconnection
165 struct GNUNET_CLIENT_TransmitHandle *th;
168 * Closure for all the handlers given by the client
173 * Messages to send to the service
175 struct GNUNET_MESH_TransmitHandle *th_head;
176 struct GNUNET_MESH_TransmitHandle *th_tail;
179 * tid of the next tunnel to create (to avoid reusing IDs often)
181 MESH_TunnelNumber next_tid;
182 unsigned int n_handlers;
183 unsigned int n_applications;
184 unsigned int max_queue_size;
187 * Have we started the task to receive messages from the service
188 * yet? We do this after we send the 'MESH_LOCAL_CONNECT' message.
193 * Number of packets queued
195 unsigned int npackets;
198 * Configuration given by the client, in case of reconnection
200 const struct GNUNET_CONFIGURATION_Handle *cfg;
203 * Time to the next reconnect in case one reconnect fails
205 struct GNUNET_TIME_Relative reconnect_time;
210 * Description of a peer
212 struct GNUNET_MESH_Peer
215 * ID of the peer in short form
220 * Tunnel this peer belongs to
222 struct GNUNET_MESH_Tunnel *t;
225 * Flag indicating whether service has informed about its connection
233 * Opaque handle to a tunnel.
235 struct GNUNET_MESH_Tunnel
241 struct GNUNET_MESH_Tunnel *next;
242 struct GNUNET_MESH_Tunnel *prev;
245 * Callback to execute when peers connect to the tunnel
247 GNUNET_MESH_PeerConnectHandler connect_handler;
250 * Callback to execute when peers disconnect from the tunnel
252 GNUNET_MESH_PeerDisconnectHandler disconnect_handler;
255 * Closure for the connect/disconnect handlers
260 * Handle to the mesh this tunnel belongs to
262 struct GNUNET_MESH_Handle *mesh;
265 * Local ID of the tunnel
267 MESH_TunnelNumber tid;
270 * Owner of the tunnel. 0 if the tunnel is the local client.
272 GNUNET_PEER_Id owner;
275 * All peers added to the tunnel
277 struct GNUNET_MESH_Peer **peers;
280 * List of application types that have been requested for this tunnel
282 GNUNET_MESH_ApplicationType *apps;
285 * Any data the caller wants to put in here
290 * Number of peers added to the tunnel
295 * Number of packets queued in this tunnel
297 unsigned int npackets;
300 * Number of applications requested this tunnel
307 /******************************************************************************/
308 /*********************** AUXILIARY FUNCTIONS *************************/
309 /******************************************************************************/
312 * Get the tunnel handler for the tunnel specified by id from the given handle
313 * @param h Mesh handle
314 * @param tid ID of the wanted tunnel
315 * @return handle to the required tunnel or NULL if not found
317 static struct GNUNET_MESH_Tunnel *
318 retrieve_tunnel (struct GNUNET_MESH_Handle *h, MESH_TunnelNumber tid)
320 struct GNUNET_MESH_Tunnel *t;
334 * Create a new tunnel and insert it in the tunnel list of the mesh handle
335 * @param h Mesh handle
336 * @param tid desired tid of the tunnel, 0 to assign one automatically
337 * @return handle to the created tunnel
339 static struct GNUNET_MESH_Tunnel *
340 create_tunnel (struct GNUNET_MESH_Handle *h, MESH_TunnelNumber tid)
342 struct GNUNET_MESH_Tunnel *t;
344 t = GNUNET_malloc (sizeof (struct GNUNET_MESH_Tunnel));
345 GNUNET_CONTAINER_DLL_insert (h->tunnels_head, h->tunnels_tail, t);
349 t->tid = h->next_tid;
350 while (NULL != retrieve_tunnel (h, h->next_tid))
353 h->next_tid &= ~GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
354 h->next_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
366 * Destroy the specified tunnel.
367 * - Destroys all peers, calling the disconnect callback on each if needed
368 * - Cancels all outgoing traffic for that tunnel, calling respective notifys
369 * - Calls cleaner if tunnel was inbound
370 * - Frees all memory used
372 * @param t Pointer to the tunnel.
373 * @param call_handler Whether to call the cleaner handler.
375 * @return Handle to the required tunnel or NULL if not found.
378 destroy_tunnel (struct GNUNET_MESH_Tunnel *t, int call_cleaner)
380 struct GNUNET_MESH_Handle *h;
381 struct GNUNET_PeerIdentity pi;
382 struct GNUNET_MESH_TransmitHandle *th;
383 struct GNUNET_MESH_TransmitHandle *next;
393 /* disconnect all peers */
394 GNUNET_CONTAINER_DLL_remove (h->tunnels_head, h->tunnels_tail, t);
395 for (i = 0; i < t->npeers; i++)
397 if ( (NULL != t->disconnect_handler) && t->peers[i]->connected)
399 GNUNET_PEER_resolve (t->peers[i]->id, &pi);
400 t->disconnect_handler (t->cls, &pi);
402 GNUNET_PEER_change_rc (t->peers[i]->id, -1);
403 GNUNET_free (t->peers[i]);
406 /* signal tunnel destruction */
407 if ( (NULL != h->cleaner) && (0 != t->owner) && (GNUNET_YES == call_cleaner) )
408 h->cleaner (h->cls, t, t->ctx);
410 /* check that clients did not leave messages behind in the queue */
411 for (th = h->th_head; NULL != th; th = next)
416 /* we should not really get here, as clients should have
417 aborted there requests already */
419 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
421 /* clean up request */
422 if (GNUNET_SCHEDULER_NO_TASK != th->timeout_task)
423 GNUNET_SCHEDULER_cancel (th->timeout_task);
427 /* if there are no more pending requests with mesh service, cancel active request */
428 /* Note: this should be unnecessary... */
429 if ( (NULL == h->th_head) && (NULL != h->th))
431 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
437 GNUNET_free (t->peers);
439 GNUNET_PEER_change_rc (t->owner, -1);
440 if (0 != t->napps && t->apps)
441 GNUNET_free (t->apps);
448 * Get the peer descriptor for the peer with id from the given tunnel
449 * @param t Tunnel handle
450 * @param id Short form ID of the wanted peer
451 * @return handle to the requested peer or NULL if not found
453 static struct GNUNET_MESH_Peer *
454 retrieve_peer (struct GNUNET_MESH_Tunnel *t, GNUNET_PEER_Id id)
458 for (i = 0; i < t->npeers; i++)
459 if (t->peers[i]->id == id)
466 * Add a peer into a tunnel
467 * @param t Tunnel handle
468 * @param pi Full ID of the new peer
469 * @return handle to the newly created peer
471 static struct GNUNET_MESH_Peer *
472 add_peer_to_tunnel (struct GNUNET_MESH_Tunnel *t,
473 const struct GNUNET_PeerIdentity *pi)
475 struct GNUNET_MESH_Peer *p;
483 id = GNUNET_PEER_intern (pi);
485 p = GNUNET_malloc (sizeof (struct GNUNET_MESH_Peer));
488 GNUNET_array_append (t->peers, t->npeers, p);
494 * Remove a peer from a tunnel
495 * @param p Peer handle
498 remove_peer_from_tunnel (struct GNUNET_MESH_Peer *p)
502 for (i = 0; i < p->t->npeers; i++)
504 if (p->t->peers[i] == p)
507 if (i == p->t->npeers)
512 p->t->peers[i] = p->t->peers[p->t->npeers - 1];
513 GNUNET_array_grow (p->t->peers, p->t->npeers, p->t->npeers - 1);
518 * Notify client that the transmission has timed out
520 * @param tc task context
523 timeout_transmission (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
525 struct GNUNET_MESH_TransmitHandle *th = cls;
526 struct GNUNET_MESH_Handle *mesh;
528 mesh = th->tunnel->mesh;
529 GNUNET_CONTAINER_DLL_remove (mesh->th_head, mesh->th_tail, th);
530 if (th->notify != NULL)
531 th->notify (th->notify_cls, 0, NULL);
533 if ((NULL == mesh->th_head) && (NULL != mesh->th))
535 /* queue empty, no point in asking for transmission */
536 GNUNET_CLIENT_notify_transmit_ready_cancel (mesh->th);
543 * Add a transmit handle to the transmission queue by priority and set the
546 * @param h mesh handle with the queue head and tail
547 * @param th handle to the packet to be transmitted
550 add_to_queue (struct GNUNET_MESH_Handle *h,
551 struct GNUNET_MESH_TransmitHandle *th)
553 struct GNUNET_MESH_TransmitHandle *p;
556 while ((NULL != p) && (th->priority <= p->priority))
562 GNUNET_CONTAINER_DLL_insert_after (h->th_head, h->th_tail, p, th);
563 if (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value == th->timeout.abs_value)
566 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
567 (th->timeout), &timeout_transmission, th);
572 * Auxiliary function to send an already constructed packet to the service.
573 * Takes care of creating a new queue element, copying the message and
574 * calling the tmt_rdy function if necessary.
576 * @param h mesh handle
577 * @param msg message to transmit
578 * @param tunnel tunnel this send is related to (NULL if N/A)
581 send_packet (struct GNUNET_MESH_Handle *h,
582 const struct GNUNET_MessageHeader *msg,
583 struct GNUNET_MESH_Tunnel *tunnel);
587 * Reconnect callback: tries to reconnect again after a failer previous
589 * @param cls closure (mesh handle)
590 * @param tc task context
593 reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
597 * Send a connect packet to the service with the applications and types
598 * requested by the user.
600 * @param h The mesh handle.
604 send_connect (struct GNUNET_MESH_Handle *h)
608 size = sizeof (struct GNUNET_MESH_ClientConnect);
609 size += h->n_applications * sizeof (GNUNET_MESH_ApplicationType);
610 size += h->n_handlers * sizeof (uint16_t);
613 struct GNUNET_MESH_ClientConnect *msg;
614 GNUNET_MESH_ApplicationType *apps;
619 /* build connection packet */
620 msg = (struct GNUNET_MESH_ClientConnect *) buf;
621 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT);
622 msg->header.size = htons (size);
623 apps = (GNUNET_MESH_ApplicationType *) &msg[1];
624 for (napps = 0; napps < h->n_applications; napps++)
626 apps[napps] = htonl (h->applications[napps]);
627 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: app %u\n", h->applications[napps]);
629 types = (uint16_t *) & apps[napps];
630 for (ntypes = 0; ntypes < h->n_handlers; ntypes++)
631 types[ntypes] = htons (h->message_handlers[ntypes].type);
632 msg->applications = htons (napps);
633 msg->types = htons (ntypes);
635 LOG (GNUNET_ERROR_TYPE_DEBUG,
636 "mesh: Sending %lu bytes long message %d types and %d apps\n",
637 ntohs (msg->header.size), ntypes, napps);
639 send_packet (h, &msg->header, NULL);
645 * Reconnect to the service, retransmit all infomation to try to restore the
648 * @param h handle to the mesh
650 * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
653 reconnect (struct GNUNET_MESH_Handle *h)
655 struct GNUNET_MESH_Tunnel *t;
659 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: *****************************\n");
660 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: ******* RECONNECT *******\n");
661 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: *****************************\n");
663 h->in_receive = GNUNET_NO;
667 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
670 if (NULL != h->client)
672 GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
676 h->client = GNUNET_CLIENT_connect ("mesh", h->cfg);
677 if (h->client == NULL)
679 GNUNET_SCHEDULER_add_delayed (h->reconnect_time, &reconnect_cbk, h);
681 GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
682 GNUNET_TIME_relative_multiply
683 (h->reconnect_time, 2));
684 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: Next retry in %sms\n",
685 GNUNET_TIME_relative_to_string (h->reconnect_time));
691 h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
694 /* Rebuild all tunnels */
695 for (t = h->tunnels_head; NULL != t; t = t->next)
697 struct GNUNET_MESH_TunnelMessage tmsg;
698 struct GNUNET_MESH_PeerControl pmsg;
700 if (t->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
702 /* Tunnel was created by service (incoming tunnel) */
703 /* TODO: Notify service of missing tunnel, to request
704 * creator to recreate path (find a path to him via DHT?)
708 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
709 tmsg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
710 tmsg.tunnel_id = htonl (t->tid);
711 send_packet (h, &tmsg.header, t);
713 pmsg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
714 pmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
715 pmsg.tunnel_id = htonl (t->tid);
717 /* Reconnect all peers */
718 for (i = 0; i < t->npeers; i++)
720 GNUNET_PEER_resolve (t->peers[i]->id, &pmsg.peer);
721 if (NULL != t->disconnect_handler && t->peers[i]->connected)
722 t->disconnect_handler (t->cls, &pmsg.peer);
723 /* If the tunnel was "by type", dont connect individual peers */
725 send_packet (t->mesh, &pmsg.header, t);
727 /* Reconnect all types, if any */
728 for (i = 0; i < t->napps; i++)
730 struct GNUNET_MESH_ConnectPeerByType msg;
732 msg.header.size = htons (sizeof (struct GNUNET_MESH_ConnectPeerByType));
733 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE);
734 msg.tunnel_id = htonl (t->tid);
735 msg.type = htonl (t->apps[i]);
736 send_packet (t->mesh, &msg.header, t);
743 * Reconnect callback: tries to reconnect again after a failer previous
745 * @param cls closure (mesh handle)
746 * @param tc task context
749 reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
751 struct GNUNET_MESH_Handle *h = cls;
753 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
759 /******************************************************************************/
760 /*********************** RECEIVE HANDLERS ****************************/
761 /******************************************************************************/
764 * Process the new tunnel notification and add it to the tunnels in the handle
766 * @param h The mesh handle
767 * @param msg A message with the details of the new incoming tunnel
770 process_tunnel_created (struct GNUNET_MESH_Handle *h,
771 const struct GNUNET_MESH_TunnelNotification *msg)
773 struct GNUNET_MESH_Tunnel *t;
774 MESH_TunnelNumber tid;
776 tid = ntohl (msg->tunnel_id);
777 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
782 t = create_tunnel (h, tid);
783 t->owner = GNUNET_PEER_intern (&msg->peer);
785 t->peers = GNUNET_malloc (sizeof (struct GNUNET_MESH_Peer *));
786 t->peers[0] = GNUNET_malloc (sizeof (struct GNUNET_MESH_Peer));
788 t->peers[0]->connected = 1;
789 t->peers[0]->id = t->owner;
790 GNUNET_PEER_change_rc (t->owner, 1);
793 if (NULL != h->new_tunnel)
795 struct GNUNET_ATS_Information atsi;
799 t->ctx = h->new_tunnel (h->cls, t, &msg->peer, &atsi);
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: new incoming tunnel %X\n",
810 * Process the tunnel destroy notification and free associated resources
812 * @param h The mesh handle
813 * @param msg A message with the details of the tunnel being destroyed
816 process_tunnel_destroy (struct GNUNET_MESH_Handle *h,
817 const struct GNUNET_MESH_TunnelMessage *msg)
819 struct GNUNET_MESH_Tunnel *t;
820 MESH_TunnelNumber tid;
822 tid = ntohl (msg->tunnel_id);
823 t = retrieve_tunnel (h, tid);
834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: tunnel %u destroyed\n", t->tid);
836 destroy_tunnel (t, GNUNET_YES);
842 * Process the new peer event and notify the upper level of it
844 * @param h The mesh handle
845 * @param msg A message with the details of the peer event
848 process_peer_event (struct GNUNET_MESH_Handle *h,
849 const struct GNUNET_MESH_PeerControl *msg)
851 struct GNUNET_MESH_Tunnel *t;
852 struct GNUNET_MESH_Peer *p;
853 struct GNUNET_ATS_Information atsi;
857 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: processig peer event\n");
858 size = ntohs (msg->header.size);
859 if (size != sizeof (struct GNUNET_MESH_PeerControl))
864 t = retrieve_tunnel (h, ntohl (msg->tunnel_id));
870 id = GNUNET_PEER_search (&msg->peer);
871 if ((p = retrieve_peer (t, id)) == NULL)
872 p = add_peer_to_tunnel (t, &msg->peer);
873 if (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD == ntohs (msg->header.type))
875 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: adding peer\n");
876 if (NULL != t->connect_handler)
880 t->connect_handler (t->cls, &msg->peer, &atsi);
886 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: removing peer\n");
887 if (NULL != t->disconnect_handler && p->connected)
889 t->disconnect_handler (t->cls, &msg->peer);
891 remove_peer_from_tunnel (p);
894 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: processing peer event END\n");
899 * Process the incoming data packets
901 * @param h The mesh handle
902 * @param message A message encapsulating the data
905 process_incoming_data (struct GNUNET_MESH_Handle *h,
906 const struct GNUNET_MessageHeader *message)
908 const struct GNUNET_MessageHeader *payload;
909 const struct GNUNET_MESH_MessageHandler *handler;
910 const struct GNUNET_PeerIdentity *peer;
911 struct GNUNET_MESH_Unicast *ucast;
912 struct GNUNET_MESH_Multicast *mcast;
913 struct GNUNET_MESH_ToOrigin *to_orig;
914 struct GNUNET_MESH_Tunnel *t;
918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: Got a data message!\n");
919 type = ntohs (message->type);
922 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
923 ucast = (struct GNUNET_MESH_Unicast *) message;
925 t = retrieve_tunnel (h, ntohl (ucast->tid));
926 payload = (struct GNUNET_MessageHeader *) &ucast[1];
928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: ucast on tunnel %s [%x]\n",
929 GNUNET_i2s (peer), ntohl (ucast->tid));
931 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
932 mcast = (struct GNUNET_MESH_Multicast *) message;
933 t = retrieve_tunnel (h, ntohl (mcast->tid));
934 payload = (struct GNUNET_MessageHeader *) &mcast[1];
936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: mcast on tunnel %s [%x]\n",
937 GNUNET_i2s (peer), ntohl (mcast->tid));
939 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
940 to_orig = (struct GNUNET_MESH_ToOrigin *) message;
941 t = retrieve_tunnel (h, ntohl (to_orig->tid));
942 payload = (struct GNUNET_MessageHeader *) &to_orig[1];
943 peer = &to_orig->sender;
944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: torig on tunnel %s [%x]\n",
945 GNUNET_i2s (peer), ntohl (to_orig->tid));
956 type = ntohs (payload->type);
957 for (i = 0; i < h->n_handlers; i++)
959 handler = &h->message_handlers[i];
960 if (handler->type == type)
962 struct GNUNET_ATS_Information atsi;
967 handler->callback (h->cls, t, &t->ctx, peer, payload, &atsi))
969 LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH: callback caused disconnection\n");
970 GNUNET_MESH_disconnect (h);
976 LOG (GNUNET_ERROR_TYPE_DEBUG,
977 "MESH: callback completed successfully\n");
987 * Function to process all messages received from the service
990 * @param msg message received, NULL on timeout or fatal error
993 msg_received (void *cls, const struct GNUNET_MessageHeader *msg)
995 struct GNUNET_MESH_Handle *h = cls;
1002 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: received a message type %hu from MESH\n",
1004 switch (ntohs (msg->type))
1006 /* Notify of a new incoming tunnel */
1007 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE:
1008 process_tunnel_created (h, (struct GNUNET_MESH_TunnelNotification *) msg);
1010 /* Notify of a tunnel disconnection */
1011 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY:
1012 process_tunnel_destroy (h, (struct GNUNET_MESH_TunnelMessage *) msg);
1014 /* Notify of a new peer or a peer disconnect in the tunnel */
1015 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD:
1016 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL:
1017 process_peer_event (h, (struct GNUNET_MESH_PeerControl *) msg);
1019 /* Notify of a new data packet in the tunnel */
1020 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1021 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1022 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1023 process_incoming_data (h, msg);
1025 /* We shouldn't get any other packages, log and ignore */
1027 LOG (GNUNET_ERROR_TYPE_WARNING,
1028 "MESH: unsolicited message form service (type %d)\n",
1031 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: message processed\n");
1032 GNUNET_CLIENT_receive (h->client, &msg_received, h,
1033 GNUNET_TIME_UNIT_FOREVER_REL);
1037 /******************************************************************************/
1038 /************************ SEND FUNCTIONS ****************************/
1039 /******************************************************************************/
1042 * Function called to send a message to the service.
1043 * "buf" will be NULL and "size" zero if the socket was closed for writing in
1046 * @param cls closure, the mesh handle
1047 * @param size number of bytes available in buf
1048 * @param buf where the callee should write the connect message
1049 * @return number of bytes written to buf
1052 send_callback (void *cls, size_t size, void *buf)
1054 struct GNUNET_MESH_Handle *h = cls;
1055 struct GNUNET_MESH_TransmitHandle *th;
1060 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: Send packet() Buffer %u\n", size);
1062 if ((0 == size) || (NULL == buf))
1068 while ((NULL != (th = h->th_head)) && (size >= th->size))
1070 if (NULL != th->notify)
1072 if (th->tunnel->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1074 /* traffic to origin */
1075 struct GNUNET_MESH_ToOrigin to;
1076 struct GNUNET_MessageHeader *mh;
1078 GNUNET_assert (size >= th->size);
1079 mh = (struct GNUNET_MessageHeader *) &cbuf[sizeof (to)];
1080 psize = th->notify (th->notify_cls, size - sizeof (to), mh);
1081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: to origin, type %u\n",
1085 psize += sizeof (to);
1086 GNUNET_assert (size >= psize);
1087 to.header.size = htons (psize);
1088 to.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
1089 to.tid = htonl (th->tunnel->tid);
1090 memset (&to.oid, 0, sizeof (struct GNUNET_PeerIdentity));
1091 memset (&to.sender, 0, sizeof (struct GNUNET_PeerIdentity));
1092 memcpy (cbuf, &to, sizeof (to));
1095 else if (th->target == 0)
1098 struct GNUNET_MESH_Multicast mc;
1099 struct GNUNET_MessageHeader *mh;
1101 GNUNET_assert (size >= th->size);
1102 mh = (struct GNUNET_MessageHeader *) &cbuf[sizeof (mc)];
1103 psize = th->notify (th->notify_cls, size - sizeof (mc), mh);
1104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: multicast, type %u\n",
1108 psize += sizeof (mc);
1109 GNUNET_assert (size >= psize);
1110 mc.header.size = htons (psize);
1111 mc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1112 mc.tid = htonl (th->tunnel->tid);
1115 memset (&mc.oid, 0, sizeof (struct GNUNET_PeerIdentity));
1116 memcpy (cbuf, &mc, sizeof (mc));
1122 struct GNUNET_MESH_Unicast uc;
1123 struct GNUNET_MessageHeader *mh;
1125 GNUNET_assert (size >= th->size);
1126 mh = (struct GNUNET_MessageHeader *) &cbuf[sizeof (uc)];
1127 psize = th->notify (th->notify_cls, size - sizeof (uc), mh);
1128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: unicast, type %u\n",
1132 psize += sizeof (uc);
1133 GNUNET_assert (size >= psize);
1134 uc.header.size = htons (psize);
1135 uc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1136 uc.tid = htonl (th->tunnel->tid);
1137 memset (&uc.oid, 0, sizeof (struct GNUNET_PeerIdentity));
1138 GNUNET_PEER_resolve (th->target, &uc.destination);
1139 memcpy (cbuf, &uc, sizeof (uc));
1145 memcpy (cbuf, &th[1], th->size);
1148 if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1149 GNUNET_SCHEDULER_cancel (th->timeout_task);
1150 if (NULL != th->notify)
1152 th->tunnel->mesh->npackets--;
1153 th->tunnel->npackets--;
1155 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
1161 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: total size: %u\n", tsize);
1162 if (NULL != (th = h->th_head))
1164 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: next size: %u\n", th->size);
1166 GNUNET_CLIENT_notify_transmit_ready (h->client, th->size,
1167 GNUNET_TIME_UNIT_FOREVER_REL,
1168 GNUNET_YES, &send_callback, h);
1170 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: Send packet() END\n");
1171 if (GNUNET_NO == h->in_receive)
1173 h->in_receive = GNUNET_YES;
1174 GNUNET_CLIENT_receive (h->client, &msg_received, h,
1175 GNUNET_TIME_UNIT_FOREVER_REL);
1182 * Auxiliary function to send an already constructed packet to the service.
1183 * Takes care of creating a new queue element, copying the message and
1184 * calling the tmt_rdy function if necessary.
1186 * @param h mesh handle
1187 * @param msg message to transmit
1188 * @param tunnel tunnel this send is related to (NULL if N/A)
1191 send_packet (struct GNUNET_MESH_Handle *h,
1192 const struct GNUNET_MessageHeader *msg,
1193 struct GNUNET_MESH_Tunnel *tunnel)
1195 struct GNUNET_MESH_TransmitHandle *th;
1198 msize = ntohs (msg->size);
1199 th = GNUNET_malloc (sizeof (struct GNUNET_MESH_TransmitHandle) + msize);
1200 th->priority = UINT32_MAX;
1201 th->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
1203 th->tunnel = tunnel;
1204 memcpy (&th[1], msg, msize);
1205 add_to_queue (h, th);
1209 GNUNET_CLIENT_notify_transmit_ready (h->client, msize,
1210 GNUNET_TIME_UNIT_FOREVER_REL,
1211 GNUNET_YES, &send_callback, h);
1215 /******************************************************************************/
1216 /********************** API CALL DEFINITIONS *************************/
1217 /******************************************************************************/
1220 * Connect to the mesh service.
1222 * @param cfg configuration to use
1223 * @param queue_size size of the data message queue, shared among all tunnels
1224 * (each tunnel is guaranteed to accept at least one message,
1225 * no matter what is the status of other tunnels)
1226 * @param cls closure for the various callbacks that follow
1227 * (including handlers in the handlers array)
1228 * @param new_tunnel function called when an *inbound* tunnel is created
1229 * @param cleaner function called when an *inbound* tunnel is destroyed by the
1230 * remote peer, it is *not* called if GNUNET_MESH_tunnel_destroy
1231 * is called on the tunnel
1232 * @param handlers callbacks for messages we care about, NULL-terminated
1233 * note that the mesh is allowed to drop notifications about
1234 * inbound messages if the client does not process them fast
1235 * enough (for this notification type, a bounded queue is used)
1236 * @param stypes list of the applications that this client claims to provide
1237 * @return handle to the mesh service NULL on error
1238 * (in this case, init is never called)
1240 struct GNUNET_MESH_Handle *
1241 GNUNET_MESH_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
1242 unsigned int queue_size, void *cls,
1243 GNUNET_MESH_InboundTunnelNotificationHandler new_tunnel,
1244 GNUNET_MESH_TunnelEndHandler cleaner,
1245 const struct GNUNET_MESH_MessageHandler *handlers,
1246 const GNUNET_MESH_ApplicationType *stypes)
1248 struct GNUNET_MESH_Handle *h;
1250 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: GNUNET_MESH_connect()\n");
1251 h = GNUNET_malloc (sizeof (struct GNUNET_MESH_Handle));
1253 h->max_queue_size = queue_size;
1254 h->new_tunnel = new_tunnel;
1255 h->cleaner = cleaner;
1256 h->client = GNUNET_CLIENT_connect ("mesh", cfg);
1257 if (h->client == NULL)
1265 h->applications = stypes;
1266 h->message_handlers = handlers;
1267 h->next_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
1268 h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
1270 /* count handlers and apps, calculate size */
1271 for (h->n_applications = 0; stypes[h->n_applications]; h->n_applications++) ;
1272 for (h->n_handlers = 0; handlers[h->n_handlers].type; h->n_handlers++) ;
1274 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: GNUNET_MESH_connect() END\n");
1280 * Disconnect from the mesh service. All tunnels will be destroyed. All tunnel
1281 * disconnect callbacks will be called on any still connected peers, notifying
1282 * about their disconnection. The registered inbound tunnel cleaner will be
1283 * called should any inbound tunnels still exist.
1285 * @param handle connection to mesh to disconnect
1288 GNUNET_MESH_disconnect (struct GNUNET_MESH_Handle *handle)
1290 struct GNUNET_MESH_Tunnel *t;
1291 struct GNUNET_MESH_Tunnel *aux;
1292 struct GNUNET_MESH_TransmitHandle *th;
1294 t = handle->tunnels_head;
1298 if (t->tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: tunnel %X not destroyed\n",
1306 destroy_tunnel (t, GNUNET_YES);
1309 while ( (th = handle->th_head) != NULL)
1311 struct GNUNET_MessageHeader *msg;
1313 /* Make sure it is an allowed packet (everything else should have been
1314 * already canceled).
1316 GNUNET_break (UINT32_MAX == th->priority);
1317 GNUNET_break (NULL == th->notify);
1318 msg = (struct GNUNET_MessageHeader *) &th[1];
1319 switch (ntohs(msg->type))
1321 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT:
1322 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY:
1327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: unexpected msg %u\n",
1332 GNUNET_CONTAINER_DLL_remove (handle->th_head, handle->th_tail, th);
1336 if (NULL != handle->th)
1338 GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
1341 if (NULL != handle->client)
1343 GNUNET_CLIENT_disconnect (handle->client, GNUNET_NO);
1344 handle->client = NULL;
1346 GNUNET_free (handle);
1351 * Create a new tunnel (we're initiator and will be allowed to add/remove peers
1352 * and to broadcast).
1354 * @param h mesh handle
1355 * @param tunnel_ctx client's tunnel context to associate with the tunnel
1356 * @param connect_handler function to call when peers are actually connected
1357 * @param disconnect_handler function to call when peers are disconnected
1358 * @param handler_cls closure for connect/disconnect handlers
1360 struct GNUNET_MESH_Tunnel *
1361 GNUNET_MESH_tunnel_create (struct GNUNET_MESH_Handle *h, void *tunnel_ctx,
1362 GNUNET_MESH_PeerConnectHandler connect_handler,
1363 GNUNET_MESH_PeerDisconnectHandler disconnect_handler,
1366 struct GNUNET_MESH_Tunnel *t;
1367 struct GNUNET_MESH_TunnelMessage msg;
1369 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: Creating new tunnel\n");
1370 t = create_tunnel (h, 0);
1371 t->connect_handler = connect_handler;
1372 t->disconnect_handler = disconnect_handler;
1373 t->cls = handler_cls;
1374 t->ctx = tunnel_ctx;
1375 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1376 msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1377 msg.tunnel_id = htonl (t->tid);
1378 send_packet (h, &msg.header, t);
1384 * Destroy an existing tunnel. The existing callback for the tunnel will NOT
1387 * @param tunnel tunnel handle
1390 GNUNET_MESH_tunnel_destroy (struct GNUNET_MESH_Tunnel *tunnel)
1392 struct GNUNET_MESH_Handle *h;
1393 struct GNUNET_MESH_TunnelMessage msg;
1394 struct GNUNET_MESH_TransmitHandle *th;
1396 LOG (GNUNET_ERROR_TYPE_DEBUG, "mesh: Destroying tunnel\n");
1399 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1400 msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1401 msg.tunnel_id = htonl (tunnel->tid);
1405 struct GNUNET_MESH_TransmitHandle *aux;
1406 if (th->tunnel == tunnel)
1409 /* FIXME call the handler? */
1410 if (NULL != th->notify)
1411 th->notify (th->notify_cls, 0, NULL);
1412 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
1420 destroy_tunnel (tunnel, GNUNET_NO);
1421 send_packet (h, &msg.header, tunnel);
1426 * Request that a peer should be added to the tunnel. The existing
1427 * connect handler will be called ONCE with either success or failure.
1428 * This function should NOT be called again with the same peer before the
1429 * connect handler is called.
1431 * @param tunnel handle to existing tunnel
1432 * @param peer peer to add
1435 GNUNET_MESH_peer_request_connect_add (struct GNUNET_MESH_Tunnel *tunnel,
1436 const struct GNUNET_PeerIdentity *peer)
1438 struct GNUNET_MESH_PeerControl msg;
1439 GNUNET_PEER_Id peer_id;
1442 peer_id = GNUNET_PEER_intern (peer);
1443 for (i = 0; i < tunnel->npeers; i++)
1445 if (tunnel->peers[i]->id == peer_id)
1447 /* Peer already exists in tunnel */
1448 GNUNET_PEER_change_rc (peer_id, -1);
1453 if (NULL == add_peer_to_tunnel (tunnel, peer))
1456 msg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1457 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1458 msg.tunnel_id = htonl (tunnel->tid);
1460 send_packet (tunnel->mesh, &msg.header, tunnel);
1467 * Request that a peer should be removed from the tunnel. The existing
1468 * disconnect handler will be called ONCE if we were connected.
1470 * @param tunnel handle to existing tunnel
1471 * @param peer peer to remove
1474 GNUNET_MESH_peer_request_connect_del (struct GNUNET_MESH_Tunnel *tunnel,
1475 const struct GNUNET_PeerIdentity *peer)
1477 struct GNUNET_MESH_PeerControl msg;
1478 GNUNET_PEER_Id peer_id;
1481 peer_id = GNUNET_PEER_search (peer);
1487 for (i = 0; i < tunnel->npeers; i++)
1488 if (tunnel->peers[i]->id == peer_id)
1490 if (i == tunnel->npeers)
1495 if (NULL != tunnel->disconnect_handler && tunnel->peers[i]->connected == 1)
1496 tunnel->disconnect_handler (tunnel->cls, peer);
1497 GNUNET_PEER_change_rc (peer_id, -1);
1498 GNUNET_free (tunnel->peers[i]);
1499 tunnel->peers[i] = tunnel->peers[tunnel->npeers - 1];
1500 GNUNET_array_grow (tunnel->peers, tunnel->npeers, tunnel->npeers - 1);
1502 msg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1503 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1504 msg.tunnel_id = htonl (tunnel->tid);
1505 memcpy (&msg.peer, peer, sizeof (struct GNUNET_PeerIdentity));
1506 send_packet (tunnel->mesh, &msg.header, tunnel);
1511 * Request that the mesh should try to connect to a peer supporting the given
1514 * @param tunnel handle to existing tunnel
1515 * @param app_type application type that must be supported by the peer (MESH
1516 * should discover peer in proximity handling this type)
1519 GNUNET_MESH_peer_request_connect_by_type (struct GNUNET_MESH_Tunnel *tunnel,
1520 GNUNET_MESH_ApplicationType app_type)
1522 struct GNUNET_MESH_ConnectPeerByType msg;
1524 GNUNET_array_append (tunnel->apps, tunnel->napps, app_type);
1526 msg.header.size = htons (sizeof (struct GNUNET_MESH_ConnectPeerByType));
1527 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE);
1528 msg.tunnel_id = htonl (tunnel->tid);
1529 msg.type = htonl (app_type);
1530 send_packet (tunnel->mesh, &msg.header, tunnel);
1535 * Ask the mesh to call "notify" once it is ready to transmit the
1536 * given number of bytes to the specified "target". If we are not yet
1537 * connected to the specified peer, a call to this function will cause
1538 * us to try to establish a connection.
1540 * @param tunnel tunnel to use for transmission
1541 * @param cork is corking allowed for this transmission?
1542 * @param priority how important is the message?
1543 * @param maxdelay how long can the message wait?
1544 * @param target destination for the message,
1545 * NULL for multicast to all tunnel targets
1546 * @param notify_size how many bytes of buffer space does notify want?
1547 * @param notify function to call when buffer space is available;
1548 * will be called with NULL on timeout or if the overall queue
1549 * for this peer is larger than queue_size and this is currently
1550 * the message with the lowest priority
1551 * @param notify_cls closure for notify
1552 * @return non-NULL if the notify callback was queued,
1553 * NULL if we can not even queue the request (insufficient
1554 * memory); if NULL is returned, "notify" will NOT be called.
1556 struct GNUNET_MESH_TransmitHandle *
1557 GNUNET_MESH_notify_transmit_ready (struct GNUNET_MESH_Tunnel *tunnel, int cork,
1559 struct GNUNET_TIME_Relative maxdelay,
1560 const struct GNUNET_PeerIdentity *target,
1562 GNUNET_CONNECTION_TransmitReadyNotify notify,
1565 struct GNUNET_MESH_TransmitHandle *th;
1566 struct GNUNET_MESH_TransmitHandle *least_priority_th;
1567 uint32_t least_priority;
1570 GNUNET_assert (NULL != tunnel);
1572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1573 "mesh: mesh notify transmit ready called\n");
1575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: target %s\n",
1576 GNUNET_i2s (target));
1578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mesh: target multicast\n");
1580 GNUNET_assert (NULL != notify);
1581 if (tunnel->mesh->npackets >= tunnel->mesh->max_queue_size &&
1582 tunnel->npackets > 0)
1587 th = tunnel->mesh->th_tail;
1588 least_priority = priority;
1589 least_priority_th = NULL;
1592 if (th->priority < least_priority && th->tunnel->npackets > 1)
1594 least_priority_th = th;
1595 least_priority = th->priority;
1599 if (NULL == least_priority_th)
1601 /* Can't be a control message */
1602 GNUNET_assert (NULL != least_priority_th->notify);
1603 least_priority_th->notify (notify_cls, 0, NULL);
1604 least_priority_th->tunnel->npackets--;
1605 tunnel->mesh->npackets--;
1606 GNUNET_CONTAINER_DLL_remove (tunnel->mesh->th_head, tunnel->mesh->th_tail,
1608 if (GNUNET_SCHEDULER_NO_TASK != least_priority_th->timeout_task)
1609 GNUNET_SCHEDULER_cancel (least_priority_th->timeout_task);
1610 GNUNET_free (least_priority_th);
1613 tunnel->mesh->npackets++;
1614 th = GNUNET_malloc (sizeof (struct GNUNET_MESH_TransmitHandle));
1615 th->tunnel = tunnel;
1616 th->priority = priority;
1617 th->timeout = GNUNET_TIME_relative_to_absolute (maxdelay);
1618 th->target = GNUNET_PEER_intern (target);
1619 if (tunnel->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1620 overhead = sizeof (struct GNUNET_MESH_ToOrigin);
1621 else if (NULL == target)
1622 overhead = sizeof (struct GNUNET_MESH_Multicast);
1624 overhead = sizeof (struct GNUNET_MESH_Unicast);
1625 th->size = notify_size + overhead;
1626 th->notify = notify;
1627 th->notify_cls = notify_cls;
1628 add_to_queue (tunnel->mesh, th);
1629 if (NULL != tunnel->mesh->th)
1632 GNUNET_CLIENT_notify_transmit_ready (tunnel->mesh->client, th->size,
1633 GNUNET_TIME_UNIT_FOREVER_REL,
1634 GNUNET_YES, &send_callback,
1641 * Cancel the specified transmission-ready notification.
1643 * @param th handle that was returned by "notify_transmit_ready".
1646 GNUNET_MESH_notify_transmit_ready_cancel (struct GNUNET_MESH_TransmitHandle *th)
1648 struct GNUNET_MESH_Handle *mesh;
1650 mesh = th->tunnel->mesh;
1651 if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1652 GNUNET_SCHEDULER_cancel (th->timeout_task);
1653 GNUNET_CONTAINER_DLL_remove (mesh->th_head, mesh->th_tail, th);
1655 if ((NULL == mesh->th_head) && (NULL != mesh->th))
1657 /* queue empty, no point in asking for transmission */
1658 GNUNET_CLIENT_notify_transmit_ready_cancel (mesh->th);
1665 * Transition API for tunnel ctx management
1668 GNUNET_MESH_tunnel_set_data (struct GNUNET_MESH_Tunnel *tunnel, void *data)
1674 * Transition API for tunnel ctx management
1677 GNUNET_MESH_tunnel_get_data (struct GNUNET_MESH_Tunnel *tunnel)
1683 #if 0 /* keep Emacsens' auto-indent happy */