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
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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.
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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 cadet/cadet_api.c
20 * @brief cadet api: client implementation of new cadet service
21 * @author Bartlomiej Polot
25 #include "gnunet_util_lib.h"
26 #include "gnunet_cadet_service.h"
28 #include "cadet_protocol.h"
30 #define LOG(kind,...) GNUNET_log_from (kind, "cadet-api",__VA_ARGS__)
32 /******************************************************************************/
33 /************************ DATA STRUCTURES ****************************/
34 /******************************************************************************/
37 * Transmission queue to the service
39 struct GNUNET_CADET_TransmitHandle
45 struct GNUNET_CADET_TransmitHandle *next;
50 struct GNUNET_CADET_TransmitHandle *prev;
53 * Channel this message is sent on / for (may be NULL for control messages).
55 struct GNUNET_CADET_Channel *channel;
58 * Callback to obtain the message to transmit, or NULL if we
59 * got the message in 'data'. Notice that messages built
60 * by 'notify' need to be encapsulated with information about
63 GNUNET_CONNECTION_TransmitReadyNotify notify;
66 * Closure for 'notify'
71 * How long is this message valid. Once the timeout has been
72 * reached, the message must no longer be sent. If this
73 * is a message with a 'notify' callback set, the 'notify'
74 * function should be called with 'buf' NULL and size 0.
76 struct GNUNET_TIME_Absolute timeout;
79 * Task triggering a timeout, can be NO_TASK if the timeout is FOREVER.
81 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
84 * Size of 'data' -- or the desired size of 'notify' if 'data' is NULL.
94 GNUNET_CADET_ChannelCB channel_cb;
99 GNUNET_CADET_PeersCB peers_cb;
104 GNUNET_CADET_PeerCB peer_cb;
109 GNUNET_CADET_TunnelsCB tunnels_cb;
114 GNUNET_CADET_TunnelCB tunnel_cb;
119 * Opaque handle to the service.
121 struct GNUNET_CADET_Handle
125 * Handle to the server connection, to send messages later
127 struct GNUNET_CLIENT_Connection *client;
130 * Set of handlers used for processing incoming messages in the channels
132 const struct GNUNET_CADET_MessageHandler *message_handlers;
135 * Number of handlers in the handlers array.
137 unsigned int n_handlers;
142 const uint32_t *ports;
147 unsigned int n_ports;
150 * Double linked list of the channels this client is connected to, head.
152 struct GNUNET_CADET_Channel *channels_head;
155 * Double linked list of the channels this client is connected to, tail.
157 struct GNUNET_CADET_Channel *channels_tail;
160 * Callback for inbound channel creation
162 GNUNET_CADET_InboundChannelNotificationHandler *new_channel;
165 * Callback for inbound channel disconnection
167 GNUNET_CADET_ChannelEndHandler *cleaner;
170 * Handle to cancel pending transmissions in case of disconnection
172 struct GNUNET_CLIENT_TransmitHandle *th;
175 * Closure for all the handlers given by the client
180 * Messages to send to the service, head.
182 struct GNUNET_CADET_TransmitHandle *th_head;
185 * Messages to send to the service, tail.
187 struct GNUNET_CADET_TransmitHandle *th_tail;
190 * chid of the next channel to create (to avoid reusing IDs often)
192 CADET_ChannelNumber next_chid;
195 * Have we started the task to receive messages from the service
196 * yet? We do this after we send the 'CADET_LOCAL_CONNECT' message.
201 * Configuration given by the client, in case of reconnection
203 const struct GNUNET_CONFIGURATION_Handle *cfg;
206 * Time to the next reconnect in case one reconnect fails
208 struct GNUNET_TIME_Relative reconnect_time;
211 * Task for trying to reconnect.
213 GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
216 * Callback for an info task (only one active at a time).
218 union CadetInfoCB info_cb;
221 * Info callback closure for @c info_cb.
228 * Description of a peer
230 struct GNUNET_CADET_Peer
233 * ID of the peer in short form
238 * Channel this peer belongs to
240 struct GNUNET_CADET_Channel *t;
245 * Opaque handle to a channel.
247 struct GNUNET_CADET_Channel
253 struct GNUNET_CADET_Channel *next;
258 struct GNUNET_CADET_Channel *prev;
261 * Handle to the cadet this channel belongs to
263 struct GNUNET_CADET_Handle *cadet;
266 * Local ID of the channel
268 CADET_ChannelNumber chid;
276 * Other end of the channel.
281 * Any data the caller wants to put in here
286 * Size of packet queued in this channel
288 unsigned int packet_size;
291 * Channel options: reliability, etc.
293 enum GNUNET_CADET_ChannelOption options;
296 * Are we allowed to send to the service?
304 * Implementation state for cadet's message queue.
309 * The current transmit handle, or NULL
310 * if no transmit is active.
312 struct GNUNET_CADET_TransmitHandle *th;
315 * Channel to send the data over.
317 struct GNUNET_CADET_Channel *channel;
321 /******************************************************************************/
322 /*********************** DECLARATIONS *************************/
323 /******************************************************************************/
326 * Function called to send a message to the service.
327 * "buf" will be NULL and "size" zero if the socket was closed for writing in
330 * @param cls closure, the cadet handle
331 * @param size number of bytes available in buf
332 * @param buf where the callee should write the connect message
333 * @return number of bytes written to buf
336 send_callback (void *cls, size_t size, void *buf);
339 /******************************************************************************/
340 /*********************** AUXILIARY FUNCTIONS *************************/
341 /******************************************************************************/
344 * Check if transmission is a payload packet.
346 * @param th Transmission handle.
348 * @return GNUNET_YES if it is a payload packet,
349 * GNUNET_NO if it is a cadet management packet.
352 th_is_payload (struct GNUNET_CADET_TransmitHandle *th)
354 return (th->notify != NULL) ? GNUNET_YES : GNUNET_NO;
359 * Check whether there is any message ready in the queue and find the size.
361 * @param h Cadet handle.
363 * @return The size of the first ready message in the queue,
364 * 0 if there is none.
367 message_ready_size (struct GNUNET_CADET_Handle *h)
369 struct GNUNET_CADET_TransmitHandle *th;
370 struct GNUNET_CADET_Channel *ch;
372 for (th = h->th_head; NULL != th; th = th->next)
375 if (GNUNET_NO == th_is_payload (th))
377 LOG (GNUNET_ERROR_TYPE_DEBUG, "# message internal\n");
380 if (GNUNET_YES == ch->allow_send)
382 LOG (GNUNET_ERROR_TYPE_DEBUG, "# message payload ok\n");
391 * Get the channel handler for the channel specified by id from the given handle
392 * @param h Cadet handle
393 * @param chid ID of the wanted channel
394 * @return handle to the required channel or NULL if not found
396 static struct GNUNET_CADET_Channel *
397 retrieve_channel (struct GNUNET_CADET_Handle *h, CADET_ChannelNumber chid)
399 struct GNUNET_CADET_Channel *ch;
401 ch = h->channels_head;
404 if (ch->chid == chid)
413 * Create a new channel and insert it in the channel list of the cadet handle
415 * @param h Cadet handle
416 * @param chid Desired chid of the channel, 0 to assign one automatically.
418 * @return Handle to the created channel.
420 static struct GNUNET_CADET_Channel *
421 create_channel (struct GNUNET_CADET_Handle *h, CADET_ChannelNumber chid)
423 struct GNUNET_CADET_Channel *ch;
425 ch = GNUNET_new (struct GNUNET_CADET_Channel);
426 GNUNET_CONTAINER_DLL_insert (h->channels_head, h->channels_tail, ch);
430 ch->chid = h->next_chid;
431 while (NULL != retrieve_channel (h, h->next_chid))
434 h->next_chid &= ~GNUNET_CADET_LOCAL_CHANNEL_ID_SERV;
435 h->next_chid |= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI;
442 ch->allow_send = GNUNET_NO;
448 * Destroy the specified channel.
449 * - Destroys all peers, calling the disconnect callback on each if needed
450 * - Cancels all outgoing traffic for that channel, calling respective notifys
451 * - Calls cleaner if channel was inbound
452 * - Frees all memory used
454 * @param ch Pointer to the channel.
455 * @param call_cleaner Whether to call the cleaner handler.
457 * @return Handle to the required channel or NULL if not found.
460 destroy_channel (struct GNUNET_CADET_Channel *ch, int call_cleaner)
462 struct GNUNET_CADET_Handle *h;
463 struct GNUNET_CADET_TransmitHandle *th;
464 struct GNUNET_CADET_TransmitHandle *next;
466 LOG (GNUNET_ERROR_TYPE_DEBUG, " destroy_channel %X\n", ch->chid);
475 GNUNET_CONTAINER_DLL_remove (h->channels_head, h->channels_tail, ch);
477 /* signal channel destruction */
478 if ( (NULL != h->cleaner) && (0 != ch->peer) && (GNUNET_YES == call_cleaner) )
480 LOG (GNUNET_ERROR_TYPE_DEBUG, " calling cleaner\n");
481 h->cleaner (h->cls, ch, ch->ctx);
484 /* check that clients did not leave messages behind in the queue */
485 for (th = h->th_head; NULL != th; th = next)
488 if (th->channel != ch)
490 /* Clients should have aborted their requests already.
491 * Management traffic should be ok, as clients can't cancel that.
492 * If the service crashed and we are reconnecting, it's ok.
494 GNUNET_break (GNUNET_NO == th_is_payload (th)
495 || GNUNET_NO == h->in_receive);
496 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
498 /* clean up request */
499 if (GNUNET_SCHEDULER_NO_TASK != th->timeout_task)
500 GNUNET_SCHEDULER_cancel (th->timeout_task);
504 /* if there are no more pending requests with cadet service, cancel active request */
505 /* Note: this should be unnecessary... */
506 if ((0 == message_ready_size (h)) && (NULL != h->th))
508 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
513 GNUNET_PEER_change_rc (ch->peer, -1);
520 * Notify client that the transmission has timed out
523 * @param tc task context
526 timeout_transmission (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
528 struct GNUNET_CADET_TransmitHandle *th = cls;
529 struct GNUNET_CADET_Handle *cadet;
531 cadet = th->channel->cadet;
532 GNUNET_CONTAINER_DLL_remove (cadet->th_head, cadet->th_tail, th);
533 th->channel->packet_size = 0;
534 if (GNUNET_YES == th_is_payload (th))
535 th->notify (th->notify_cls, 0, NULL);
537 if ((0 == message_ready_size (cadet)) && (NULL != cadet->th))
539 /* nothing ready to transmit, no point in asking for transmission */
540 GNUNET_CLIENT_notify_transmit_ready_cancel (cadet->th);
547 * Add a transmit handle to the transmission queue and set the
550 * @param h cadet handle with the queue head and tail
551 * @param th handle to the packet to be transmitted
554 add_to_queue (struct GNUNET_CADET_Handle *h,
555 struct GNUNET_CADET_TransmitHandle *th)
557 GNUNET_CONTAINER_DLL_insert_tail (h->th_head, h->th_tail, th);
558 if (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us == th->timeout.abs_value_us)
561 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
562 (th->timeout), &timeout_transmission, th);
567 * Auxiliary function to send an already constructed packet to the service.
568 * Takes care of creating a new queue element, copying the message and
569 * calling the tmt_rdy function if necessary.
571 * @param h cadet handle
572 * @param msg message to transmit
573 * @param channel channel this send is related to (NULL if N/A)
576 send_packet (struct GNUNET_CADET_Handle *h,
577 const struct GNUNET_MessageHeader *msg,
578 struct GNUNET_CADET_Channel *channel);
582 * Send an ack on the channel to confirm the processing of a message.
584 * @param ch Channel on which to send the ACK.
587 send_ack (struct GNUNET_CADET_Channel *ch)
589 struct GNUNET_CADET_LocalAck msg;
591 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending ACK on channel %X\n", ch->chid);
592 msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK);
593 msg.header.size = htons (sizeof (msg));
594 msg.channel_id = htonl (ch->chid);
596 send_packet (ch->cadet, &msg.header, ch);
603 * Reconnect callback: tries to reconnect again after a failer previous
605 * @param cls closure (cadet handle)
606 * @param tc task context
609 reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
613 * Send a connect packet to the service with the applications and types
614 * requested by the user.
616 * @param h The cadet handle.
620 send_connect (struct GNUNET_CADET_Handle *h)
624 size = sizeof (struct GNUNET_CADET_ClientConnect);
625 size += h->n_ports * sizeof (uint32_t);
627 char buf[size] GNUNET_ALIGN;
628 struct GNUNET_CADET_ClientConnect *msg;
632 /* build connection packet */
633 msg = (struct GNUNET_CADET_ClientConnect *) buf;
634 msg->header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_CONNECT);
635 msg->header.size = htons (size);
636 ports = (uint32_t *) &msg[1];
637 for (i = 0; i < h->n_ports; i++)
639 ports[i] = htonl (h->ports[i]);
640 LOG (GNUNET_ERROR_TYPE_DEBUG, " port %u\n",
643 LOG (GNUNET_ERROR_TYPE_DEBUG,
644 "Sending %lu bytes long message with %u ports\n",
645 ntohs (msg->header.size), h->n_ports);
646 send_packet (h, &msg->header, NULL);
652 * Reconnect to the service, retransmit all infomation to try to restore the
655 * @param h handle to the cadet
657 * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
660 do_reconnect (struct GNUNET_CADET_Handle *h)
662 LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
663 LOG (GNUNET_ERROR_TYPE_DEBUG, "******* RECONNECT *******\n");
664 LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
665 LOG (GNUNET_ERROR_TYPE_DEBUG, "******** on %p *******\n", h);
666 LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
671 GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
674 if (NULL != h->client)
676 GNUNET_CLIENT_disconnect (h->client);
680 h->client = GNUNET_CLIENT_connect ("cadet", h->cfg);
681 if (h->client == NULL)
683 h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
686 GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
687 GNUNET_TIME_relative_multiply
688 (h->reconnect_time, 2));
689 LOG (GNUNET_ERROR_TYPE_DEBUG, "Next retry in %s\n",
690 GNUNET_STRINGS_relative_time_to_string (h->reconnect_time,
697 h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
704 * Reconnect callback: tries to reconnect again after a failer previous
706 * @param cls closure (cadet handle)
707 * @param tc task context
710 reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
712 struct GNUNET_CADET_Handle *h = cls;
714 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
715 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
722 * Reconnect to the service, retransmit all infomation to try to restore the
725 * @param h handle to the cadet
727 * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
730 reconnect (struct GNUNET_CADET_Handle *h)
732 struct GNUNET_CADET_Channel *ch;
733 struct GNUNET_CADET_Channel *next;
735 LOG (GNUNET_ERROR_TYPE_DEBUG,
736 "Requested RECONNECT, destroying all channels\n");
737 h->in_receive = GNUNET_NO;
738 for (ch = h->channels_head; NULL != ch; ch = next)
741 destroy_channel (ch, GNUNET_YES);
743 if (GNUNET_SCHEDULER_NO_TASK == h->reconnect_task)
744 h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
749 /******************************************************************************/
750 /*********************** RECEIVE HANDLERS ****************************/
751 /******************************************************************************/
754 * Process the new channel notification and add it to the channels in the handle
756 * @param h The cadet handle
757 * @param msg A message with the details of the new incoming channel
760 process_channel_created (struct GNUNET_CADET_Handle *h,
761 const struct GNUNET_CADET_ChannelMessage *msg)
763 struct GNUNET_CADET_Channel *ch;
764 CADET_ChannelNumber chid;
767 chid = ntohl (msg->channel_id);
768 port = ntohl (msg->port);
769 LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating incoming channel %X:%u\n", chid, port);
770 if (chid < GNUNET_CADET_LOCAL_CHANNEL_ID_SERV)
775 if (NULL != h->new_channel)
779 ch = create_channel (h, chid);
780 ch->allow_send = GNUNET_NO;
781 ch->peer = GNUNET_PEER_intern (&msg->peer);
785 ch->options = ntohl (msg->opt);
787 LOG (GNUNET_ERROR_TYPE_DEBUG, " created channel %p\n", ch);
788 ctx = h->new_channel (h->cls, ch, &msg->peer, ch->port, ch->options);
791 LOG (GNUNET_ERROR_TYPE_DEBUG, "User notified\n");
795 struct GNUNET_CADET_ChannelMessage d_msg;
797 LOG (GNUNET_ERROR_TYPE_DEBUG, "No handler for incoming channels\n");
799 d_msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY);
800 d_msg.header.size = htons (sizeof (struct GNUNET_CADET_ChannelMessage));
801 d_msg.channel_id = msg->channel_id;
802 memset (&d_msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
806 send_packet (h, &d_msg.header, NULL);
813 * Process the channel destroy notification and free associated resources
815 * @param h The cadet handle
816 * @param msg A message with the details of the channel being destroyed
819 process_channel_destroy (struct GNUNET_CADET_Handle *h,
820 const struct GNUNET_CADET_ChannelMessage *msg)
822 struct GNUNET_CADET_Channel *ch;
823 CADET_ChannelNumber chid;
825 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel Destroy received from service\n");
826 chid = ntohl (msg->channel_id);
827 ch = retrieve_channel (h, chid);
831 LOG (GNUNET_ERROR_TYPE_DEBUG, "channel %X unknown\n", chid);
834 LOG (GNUNET_ERROR_TYPE_DEBUG, " destroying channel %X\n", ch->chid);
835 destroy_channel (ch, GNUNET_YES);
840 * Process the incoming data packets, call appropriate handlers.
842 * @param h The cadet handle
843 * @param message A message encapsulating the data
846 process_incoming_data (struct GNUNET_CADET_Handle *h,
847 const struct GNUNET_MessageHeader *message)
849 const struct GNUNET_MessageHeader *payload;
850 const struct GNUNET_CADET_MessageHandler *handler;
851 struct GNUNET_CADET_LocalData *dmsg;
852 struct GNUNET_CADET_Channel *ch;
857 LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a data message!\n");
858 dmsg = (struct GNUNET_CADET_LocalData *) message;
859 ch = retrieve_channel (h, ntohl (dmsg->id));
866 payload = (struct GNUNET_MessageHeader *) &dmsg[1];
867 LOG (GNUNET_ERROR_TYPE_DEBUG, " %s data on channel %s [%X]\n",
868 GC_f2s (ch->chid >= GNUNET_CADET_LOCAL_CHANNEL_ID_SERV),
869 GNUNET_i2s (GNUNET_PEER_resolve2 (ch->peer)), ntohl (dmsg->id));
871 size = ntohs (message->size);
872 LOG (GNUNET_ERROR_TYPE_DEBUG, " %u bytes\n", size);
874 type = ntohs (payload->type);
875 size = ntohs (payload->size);
876 LOG (GNUNET_ERROR_TYPE_DEBUG, " payload type %s\n", GC_m2s (type));
877 for (i = 0; i < h->n_handlers; i++)
879 handler = &h->message_handlers[i];
880 LOG (GNUNET_ERROR_TYPE_DEBUG, " checking handler for type %u\n",
882 if (handler->type == type)
885 handler->callback (h->cls, ch, &ch->ctx, payload))
887 LOG (GNUNET_ERROR_TYPE_DEBUG, "callback caused disconnection\n");
888 GNUNET_CADET_channel_destroy (ch);
893 LOG (GNUNET_ERROR_TYPE_DEBUG,
894 "callback completed successfully\n");
903 * Process a local ACK message, enabling the client to send
904 * more data to the service.
906 * @param h Cadet handle.
907 * @param message Message itself.
910 process_ack (struct GNUNET_CADET_Handle *h,
911 const struct GNUNET_MessageHeader *message)
913 struct GNUNET_CADET_LocalAck *msg;
914 struct GNUNET_CADET_Channel *ch;
915 CADET_ChannelNumber chid;
917 LOG (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK!\n");
918 msg = (struct GNUNET_CADET_LocalAck *) message;
919 chid = ntohl (msg->channel_id);
920 ch = retrieve_channel (h, chid);
923 LOG (GNUNET_ERROR_TYPE_DEBUG, "ACK on unknown channel %X\n", chid);
926 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X!\n", ch->chid);
927 ch->allow_send = GNUNET_YES;
928 if (NULL == h->th && 0 < ch->packet_size)
930 LOG (GNUNET_ERROR_TYPE_DEBUG, " tmt rdy was NULL, requesting!\n");
931 h->th = GNUNET_CLIENT_notify_transmit_ready (h->client, ch->packet_size,
932 GNUNET_TIME_UNIT_FOREVER_REL,
933 GNUNET_YES, &send_callback, h);
939 * Process a local reply about info on all channels, pass info to the user.
941 * @param h Cadet handle.
942 * @param message Message itself.
945 // process_get_channels (struct GNUNET_CADET_Handle *h,
946 // const struct GNUNET_MessageHeader *message)
948 // struct GNUNET_CADET_LocalInfo *msg;
950 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Get Channels messasge received\n");
952 // if (NULL == h->channels_cb)
954 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
958 // msg = (struct GNUNET_CADET_LocalInfo *) message;
959 // if (ntohs (message->size) !=
960 // (sizeof (struct GNUNET_CADET_LocalInfo) +
961 // sizeof (struct GNUNET_PeerIdentity)))
963 // GNUNET_break_op (0);
964 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
965 // "Get channels message: size %hu - expected %u\n",
966 // ntohs (message->size),
967 // sizeof (struct GNUNET_CADET_LocalInfo));
970 // h->channels_cb (h->channels_cls,
971 // ntohl (msg->channel_id),
973 // &msg->destination);
979 * Process a local monitor_channel reply, pass info to the user.
981 * @param h Cadet handle.
982 * @param message Message itself.
985 // process_show_channel (struct GNUNET_CADET_Handle *h,
986 // const struct GNUNET_MessageHeader *message)
988 // struct GNUNET_CADET_LocalInfo *msg;
991 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Show Channel messasge received\n");
993 // if (NULL == h->channel_cb)
995 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
999 // /* Verify message sanity */
1000 // msg = (struct GNUNET_CADET_LocalInfo *) message;
1001 // esize = sizeof (struct GNUNET_CADET_LocalInfo);
1002 // if (ntohs (message->size) != esize)
1004 // GNUNET_break_op (0);
1005 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1006 // "Show channel message: size %hu - expected %u\n",
1007 // ntohs (message->size),
1010 // h->channel_cb (h->channel_cls, NULL, NULL);
1011 // h->channel_cb = NULL;
1012 // h->channel_cls = NULL;
1017 // h->channel_cb (h->channel_cls,
1018 // &msg->destination,
1025 * Process a local reply about info on all tunnels, pass info to the user.
1027 * @param h Cadet handle.
1028 * @param message Message itself.
1031 process_get_peers (struct GNUNET_CADET_Handle *h,
1032 const struct GNUNET_MessageHeader *message)
1034 struct GNUNET_CADET_LocalInfoPeer *msg;
1037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Peer messasge received\n");
1039 if (NULL == h->info_cb.peers_cb)
1041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
1045 size = ntohs (message->size);
1046 if (sizeof (struct GNUNET_CADET_LocalInfoPeer) > size)
1048 h->info_cb.peers_cb (h->info_cls, NULL, -1, 0, 0);
1049 h->info_cb.peers_cb = NULL;
1054 msg = (struct GNUNET_CADET_LocalInfoPeer *) message;
1055 h->info_cb.peers_cb (h->info_cls, &msg->destination,
1056 (int) ntohs (msg->tunnel),
1057 (unsigned int ) ntohs (msg->paths),
1063 * Process a local peer info reply, pass info to the user.
1065 * @param h Cadet handle.
1066 * @param message Message itself.
1069 process_get_peer (struct GNUNET_CADET_Handle *h,
1070 const struct GNUNET_MessageHeader *message)
1072 struct GNUNET_CADET_LocalInfoTunnel *msg;
1076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Tunnel messasge received\n");
1077 if (NULL == h->info_cb.peer_cb)
1079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
1083 /* Verify message sanity */
1084 msg = (struct GNUNET_CADET_LocalInfoTunnel *) message;
1085 msize = ntohs (message->size);
1086 esize = sizeof (struct GNUNET_CADET_LocalInfoPeer);
1089 GNUNET_break_op (0);
1090 h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
1093 // esize += ch_n * sizeof (CADET_ChannelNumber);
1094 // esize += c_n * sizeof (struct GNUNET_CADET_Hash);
1097 GNUNET_break_op (0);
1098 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "m:%u, e: %u\n", msize, esize);
1099 h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
1103 /* Call Callback with tunnel info. */
1104 h->info_cb.peer_cb (h->info_cls, &msg->destination, 0, 0, 0, NULL);
1107 h->info_cb.peer_cb = NULL;
1113 * Process a local reply about info on all tunnels, pass info to the user.
1115 * @param h Cadet handle.
1116 * @param message Message itself.
1119 process_get_tunnels (struct GNUNET_CADET_Handle *h,
1120 const struct GNUNET_MessageHeader *message)
1122 struct GNUNET_CADET_LocalInfoTunnel *msg;
1125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Tunnels messasge received\n");
1127 if (NULL == h->info_cb.tunnels_cb)
1129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
1133 size = ntohs (message->size);
1134 if (sizeof (struct GNUNET_CADET_LocalInfoTunnel) > size)
1136 h->info_cb.tunnels_cb (h->info_cls, NULL, 0, 0, 0, 0);
1137 h->info_cb.tunnels_cb = NULL;
1142 msg = (struct GNUNET_CADET_LocalInfoTunnel *) message;
1143 h->info_cb.tunnels_cb (h->info_cls, &msg->destination,
1144 ntohl (msg->channels), ntohl (msg->connections),
1145 ntohs (msg->estate), ntohs (msg->cstate));
1151 * Process a local tunnel info reply, pass info to the user.
1153 * @param h Cadet handle.
1154 * @param message Message itself.
1157 process_get_tunnel (struct GNUNET_CADET_Handle *h,
1158 const struct GNUNET_MessageHeader *message)
1160 struct GNUNET_CADET_LocalInfoTunnel *msg;
1165 struct GNUNET_CADET_Hash *conns;
1166 CADET_ChannelNumber *chns;
1168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Tunnel messasge received\n");
1169 if (NULL == h->info_cb.tunnel_cb)
1171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
1175 /* Verify message sanity */
1176 msg = (struct GNUNET_CADET_LocalInfoTunnel *) message;
1177 msize = ntohs (message->size);
1178 esize = sizeof (struct GNUNET_CADET_LocalInfoTunnel);
1181 GNUNET_break_op (0);
1182 h->info_cb.tunnel_cb (h->info_cls, NULL, 0, 0, NULL, NULL, 0, 0);
1185 ch_n = ntohl (msg->channels);
1186 c_n = ntohl (msg->connections);
1187 esize += ch_n * sizeof (CADET_ChannelNumber);
1188 esize += c_n * sizeof (struct GNUNET_CADET_Hash);
1191 GNUNET_break_op (0);
1192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "m:%u, e: %u (%u ch, %u conn)\n",
1193 msize, esize, ch_n, c_n);
1194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%u (%u ch, %u conn)\n",
1195 sizeof (struct GNUNET_CADET_LocalInfoTunnel),
1196 sizeof (CADET_ChannelNumber), sizeof (struct GNUNET_HashCode));
1197 h->info_cb.tunnel_cb (h->info_cls, NULL, 0, 0, NULL, NULL, 0, 0);
1201 /* Call Callback with tunnel info. */
1202 conns = (struct GNUNET_CADET_Hash *) &msg[1];
1203 chns = (CADET_ChannelNumber *) &conns[c_n];
1204 h->info_cb.tunnel_cb (h->info_cls, &msg->destination,
1205 ch_n, c_n, chns, conns,
1206 ntohs (msg->estate), ntohs (msg->cstate));
1209 h->info_cb.tunnel_cb = NULL;
1215 * Function to process all messages received from the service
1217 * @param cls closure
1218 * @param msg message received, NULL on timeout or fatal error
1221 msg_received (void *cls, const struct GNUNET_MessageHeader *msg)
1223 struct GNUNET_CADET_Handle *h = cls;
1228 LOG (GNUNET_ERROR_TYPE_DEBUG,
1229 "Cadet service disconnected, reconnecting\n", h);
1233 type = ntohs (msg->type);
1234 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
1235 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received a message: %s\n",
1239 /* Notify of a new incoming channel */
1240 case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_CREATE:
1241 process_channel_created (h, (struct GNUNET_CADET_ChannelMessage *) msg);
1243 /* Notify of a channel disconnection */
1244 case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY: /* TODO separate(gid problem)*/
1245 case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_NACK:
1246 process_channel_destroy (h, (struct GNUNET_CADET_ChannelMessage *) msg);
1248 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA:
1249 process_incoming_data (h, msg);
1251 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK:
1252 process_ack (h, msg);
1254 // case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNELS:
1255 // process_get_channels (h, msg);
1257 // case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL:
1258 // process_show_channel (h, msg);
1260 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS:
1261 process_get_peers (h, msg);
1263 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER:
1264 process_get_peer (h, msg);
1266 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS:
1267 process_get_tunnels (h, msg);
1269 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL:
1270 process_get_tunnel (h, msg);
1272 // case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL:
1273 // process_show_channel (h, msg);
1276 /* We shouldn't get any other packages, log and ignore */
1277 LOG (GNUNET_ERROR_TYPE_WARNING,
1278 "unsolicited message form service (type %s)\n",
1279 GC_m2s (ntohs (msg->type)));
1281 LOG (GNUNET_ERROR_TYPE_DEBUG, "message processed\n");
1282 if (GNUNET_YES == h->in_receive)
1284 GNUNET_CLIENT_receive (h->client, &msg_received, h,
1285 GNUNET_TIME_UNIT_FOREVER_REL);
1289 LOG (GNUNET_ERROR_TYPE_DEBUG,
1290 "in receive off, not calling CLIENT_receive\n");
1295 /******************************************************************************/
1296 /************************ SEND FUNCTIONS ****************************/
1297 /******************************************************************************/
1300 * Function called to send a message to the service.
1301 * "buf" will be NULL and "size" zero if the socket was closed for writing in
1304 * @param cls closure, the cadet handle
1305 * @param size number of bytes available in buf
1306 * @param buf where the callee should write the connect message
1307 * @return number of bytes written to buf
1310 send_callback (void *cls, size_t size, void *buf)
1312 struct GNUNET_CADET_Handle *h = cls;
1313 struct GNUNET_CADET_TransmitHandle *th;
1314 struct GNUNET_CADET_TransmitHandle *next;
1315 struct GNUNET_CADET_Channel *ch;
1321 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
1322 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() Buffer %u\n", size);
1323 if ((0 == size) || (NULL == buf))
1325 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Received NULL send callback on %p\n", h);
1332 nsize = message_ready_size (h);
1333 while ((NULL != (th = next)) && (0 < nsize) && (size >= nsize))
1336 if (GNUNET_YES == th_is_payload (th))
1338 struct GNUNET_CADET_LocalData *dmsg;
1339 struct GNUNET_MessageHeader *mh;
1341 LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload\n");
1342 if (GNUNET_NO == ch->allow_send)
1344 /* This channel is not ready to transmit yet, try next message */
1348 ch->packet_size = 0;
1349 GNUNET_assert (size >= th->size);
1350 dmsg = (struct GNUNET_CADET_LocalData *) cbuf;
1351 mh = (struct GNUNET_MessageHeader *) &dmsg[1];
1352 psize = th->notify (th->notify_cls,
1353 size - sizeof (struct GNUNET_CADET_LocalData),
1357 psize += sizeof (struct GNUNET_CADET_LocalData);
1358 GNUNET_assert (size >= psize);
1359 dmsg->header.size = htons (psize);
1360 dmsg->id = htonl (ch->chid);
1361 dmsg->header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA);
1362 LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload type %s\n",
1363 GC_m2s (ntohs (mh->type)));
1364 ch->allow_send = GNUNET_NO;
1368 LOG (GNUNET_ERROR_TYPE_DEBUG,
1369 "# callback returned size 0, "
1370 "application canceled transmission\n");
1375 struct GNUNET_MessageHeader *mh = (struct GNUNET_MessageHeader *) &th[1];
1377 LOG (GNUNET_ERROR_TYPE_DEBUG, "# cadet internal traffic, type %s\n",
1378 GC_m2s (ntohs (mh->type)));
1379 memcpy (cbuf, &th[1], th->size);
1382 if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1383 GNUNET_SCHEDULER_cancel (th->timeout_task);
1384 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
1387 nsize = message_ready_size (h);
1392 LOG (GNUNET_ERROR_TYPE_DEBUG, "# total size: %u\n", tsize);
1394 size = message_ready_size (h);
1397 LOG (GNUNET_ERROR_TYPE_DEBUG, "# next size: %u\n", size);
1399 GNUNET_CLIENT_notify_transmit_ready (h->client, size,
1400 GNUNET_TIME_UNIT_FOREVER_REL,
1401 GNUNET_YES, &send_callback, h);
1405 if (NULL != h->th_head)
1406 LOG (GNUNET_ERROR_TYPE_DEBUG, "# can't transmit any more\n");
1408 LOG (GNUNET_ERROR_TYPE_DEBUG, "# nothing left to transmit\n");
1410 if (GNUNET_NO == h->in_receive)
1412 LOG (GNUNET_ERROR_TYPE_DEBUG, "# start receiving from service\n");
1413 h->in_receive = GNUNET_YES;
1414 GNUNET_CLIENT_receive (h->client, &msg_received, h,
1415 GNUNET_TIME_UNIT_FOREVER_REL);
1417 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() END\n");
1423 * Auxiliary function to send an already constructed packet to the service.
1424 * Takes care of creating a new queue element, copying the message and
1425 * calling the tmt_rdy function if necessary.
1427 * @param h cadet handle
1428 * @param msg message to transmit
1429 * @param channel channel this send is related to (NULL if N/A)
1432 send_packet (struct GNUNET_CADET_Handle *h,
1433 const struct GNUNET_MessageHeader *msg,
1434 struct GNUNET_CADET_Channel *channel)
1436 struct GNUNET_CADET_TransmitHandle *th;
1439 LOG (GNUNET_ERROR_TYPE_DEBUG, " Sending message to service: %s\n",
1440 GC_m2s(ntohs(msg->type)));
1441 msize = ntohs (msg->size);
1442 th = GNUNET_malloc (sizeof (struct GNUNET_CADET_TransmitHandle) + msize);
1443 th->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
1445 th->channel = channel;
1446 memcpy (&th[1], msg, msize);
1447 add_to_queue (h, th);
1448 LOG (GNUNET_ERROR_TYPE_DEBUG, " queued\n");
1451 LOG (GNUNET_ERROR_TYPE_DEBUG, " calling ntfy tmt rdy for %u bytes\n", msize);
1453 GNUNET_CLIENT_notify_transmit_ready (h->client, msize,
1454 GNUNET_TIME_UNIT_FOREVER_REL,
1455 GNUNET_YES, &send_callback, h);
1459 /******************************************************************************/
1460 /********************** API CALL DEFINITIONS *************************/
1461 /******************************************************************************/
1463 struct GNUNET_CADET_Handle *
1464 GNUNET_CADET_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls,
1465 GNUNET_CADET_InboundChannelNotificationHandler new_channel,
1466 GNUNET_CADET_ChannelEndHandler cleaner,
1467 const struct GNUNET_CADET_MessageHandler *handlers,
1468 const uint32_t *ports)
1470 struct GNUNET_CADET_Handle *h;
1472 LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_CADET_connect()\n");
1473 h = GNUNET_new (struct GNUNET_CADET_Handle);
1474 LOG (GNUNET_ERROR_TYPE_DEBUG, " addr %p\n", h);
1476 h->new_channel = new_channel;
1477 h->cleaner = cleaner;
1478 h->client = GNUNET_CLIENT_connect ("cadet", cfg);
1479 if (h->client == NULL)
1486 h->message_handlers = handlers;
1488 h->next_chid = GNUNET_CADET_LOCAL_CHANNEL_ID_CLI;
1489 h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
1490 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
1492 if (NULL != ports && ports[0] != 0 && NULL == new_channel)
1495 LOG (GNUNET_ERROR_TYPE_DEBUG,
1496 "no new channel handler given, ports parameter is useless!!\n");
1498 if ((NULL == ports || ports[0] == 0) && NULL != new_channel)
1501 LOG (GNUNET_ERROR_TYPE_DEBUG,
1502 "no ports given, new channel handler will never be called!!\n");
1504 /* count handlers */
1505 for (h->n_handlers = 0;
1506 handlers && handlers[h->n_handlers].type;
1508 for (h->n_ports = 0;
1509 ports && ports[h->n_ports];
1512 LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_CADET_connect() END\n");
1518 GNUNET_CADET_disconnect (struct GNUNET_CADET_Handle *handle)
1520 struct GNUNET_CADET_Channel *ch;
1521 struct GNUNET_CADET_Channel *aux;
1522 struct GNUNET_CADET_TransmitHandle *th;
1524 LOG (GNUNET_ERROR_TYPE_DEBUG, "CADET DISCONNECT\n");
1526 ch = handle->channels_head;
1530 if (ch->chid < GNUNET_CADET_LOCAL_CHANNEL_ID_SERV)
1533 LOG (GNUNET_ERROR_TYPE_DEBUG, "channel %X not destroyed\n", ch->chid);
1535 destroy_channel (ch, GNUNET_YES);
1538 while ( (th = handle->th_head) != NULL)
1540 struct GNUNET_MessageHeader *msg;
1542 /* Make sure it is an allowed packet (everything else should have been
1543 * already canceled).
1545 GNUNET_break (GNUNET_NO == th_is_payload (th));
1546 msg = (struct GNUNET_MessageHeader *) &th[1];
1547 switch (ntohs(msg->type))
1549 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_CONNECT:
1550 case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_CREATE:
1551 case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY:
1552 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNELS:
1553 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL:
1554 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER:
1555 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS:
1556 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL:
1557 case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS:
1561 LOG (GNUNET_ERROR_TYPE_ERROR, "unexpected msg %u\n",
1565 GNUNET_CONTAINER_DLL_remove (handle->th_head, handle->th_tail, th);
1569 if (NULL != handle->th)
1571 GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
1574 if (NULL != handle->client)
1576 GNUNET_CLIENT_disconnect (handle->client);
1577 handle->client = NULL;
1579 if (GNUNET_SCHEDULER_NO_TASK != handle->reconnect_task)
1581 GNUNET_SCHEDULER_cancel(handle->reconnect_task);
1582 handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
1584 GNUNET_free (handle);
1589 * Create a new channel towards a remote peer.
1591 * If the destination port is not open by any peer or the destination peer
1592 * does not accept the channel, #GNUNET_CADET_ChannelEndHandler will be called
1595 * @param h cadet handle
1596 * @param channel_ctx client's channel context to associate with the channel
1597 * @param peer peer identity the channel should go to
1598 * @param port Port number.
1599 * @param options CadetOption flag field, with all desired option bits set to 1.
1601 * @return handle to the channel
1603 struct GNUNET_CADET_Channel *
1604 GNUNET_CADET_channel_create (struct GNUNET_CADET_Handle *h,
1606 const struct GNUNET_PeerIdentity *peer,
1608 enum GNUNET_CADET_ChannelOption options)
1610 struct GNUNET_CADET_Channel *ch;
1611 struct GNUNET_CADET_ChannelMessage msg;
1613 LOG (GNUNET_ERROR_TYPE_DEBUG,
1614 "Creating new channel to %s:%u\n",
1615 GNUNET_i2s (peer), port);
1616 ch = create_channel (h, 0);
1617 LOG (GNUNET_ERROR_TYPE_DEBUG, " at %p\n", ch);
1618 LOG (GNUNET_ERROR_TYPE_DEBUG, " number %X\n", ch->chid);
1619 ch->ctx = channel_ctx;
1620 ch->peer = GNUNET_PEER_intern (peer);
1621 msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_CHANNEL_CREATE);
1622 msg.header.size = htons (sizeof (struct GNUNET_CADET_ChannelMessage));
1623 msg.channel_id = htonl (ch->chid);
1624 msg.port = htonl (port);
1626 msg.opt = htonl (options);
1628 send_packet (h, &msg.header, ch);
1634 GNUNET_CADET_channel_destroy (struct GNUNET_CADET_Channel *channel)
1636 struct GNUNET_CADET_Handle *h;
1637 struct GNUNET_CADET_ChannelMessage msg;
1638 struct GNUNET_CADET_TransmitHandle *th;
1640 LOG (GNUNET_ERROR_TYPE_DEBUG, "Destroying channel\n");
1643 msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY);
1644 msg.header.size = htons (sizeof (struct GNUNET_CADET_ChannelMessage));
1645 msg.channel_id = htonl (channel->chid);
1646 memset (&msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
1652 struct GNUNET_CADET_TransmitHandle *aux;
1653 if (th->channel == channel)
1656 /* FIXME call the handler? */
1657 if (GNUNET_YES == th_is_payload (th))
1658 th->notify (th->notify_cls, 0, NULL);
1659 GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
1667 destroy_channel (channel, GNUNET_YES);
1668 send_packet (h, &msg.header, NULL);
1673 * Get information about a channel.
1675 * @param channel Channel handle.
1676 * @param option Query (GNUNET_CADET_OPTION_*).
1677 * @param ... dependant on option, currently not used
1679 * @return Union with an answer to the query.
1681 const union GNUNET_CADET_ChannelInfo *
1682 GNUNET_CADET_channel_get_info (struct GNUNET_CADET_Channel *channel,
1683 enum GNUNET_CADET_ChannelOption option, ...)
1685 static int bool_flag;
1686 const union GNUNET_CADET_ChannelInfo *ret;
1690 case GNUNET_CADET_OPTION_NOBUFFER:
1691 case GNUNET_CADET_OPTION_RELIABLE:
1692 case GNUNET_CADET_OPTION_OOORDER:
1693 if (0 != (option & channel->options))
1694 bool_flag = GNUNET_YES;
1696 bool_flag = GNUNET_NO;
1697 ret = (const union GNUNET_CADET_ChannelInfo *) &bool_flag;
1699 case GNUNET_CADET_OPTION_PEER:
1700 ret = (const union GNUNET_CADET_ChannelInfo *) GNUNET_PEER_resolve2 (channel->peer);
1710 struct GNUNET_CADET_TransmitHandle *
1711 GNUNET_CADET_notify_transmit_ready (struct GNUNET_CADET_Channel *channel, int cork,
1712 struct GNUNET_TIME_Relative maxdelay,
1714 GNUNET_CONNECTION_TransmitReadyNotify notify,
1717 struct GNUNET_CADET_TransmitHandle *th;
1719 GNUNET_assert (NULL != channel);
1720 LOG (GNUNET_ERROR_TYPE_DEBUG, "CADET NOTIFY TRANSMIT READY\n");
1721 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", channel->chid);
1722 LOG (GNUNET_ERROR_TYPE_DEBUG, " allow_send %d\n", channel->allow_send);
1723 if (channel->chid >= GNUNET_CADET_LOCAL_CHANNEL_ID_SERV)
1724 LOG (GNUNET_ERROR_TYPE_DEBUG, " to origin\n");
1726 LOG (GNUNET_ERROR_TYPE_DEBUG, " to destination\n");
1727 LOG (GNUNET_ERROR_TYPE_DEBUG, " payload size %u\n", notify_size);
1728 GNUNET_assert (NULL != notify);
1729 GNUNET_assert (0 == channel->packet_size); // Only one data packet allowed
1730 th = GNUNET_new (struct GNUNET_CADET_TransmitHandle);
1731 th->channel = channel;
1732 th->timeout = GNUNET_TIME_relative_to_absolute (maxdelay);
1733 th->size = notify_size + sizeof (struct GNUNET_CADET_LocalData);
1734 channel->packet_size = th->size;
1735 LOG (GNUNET_ERROR_TYPE_DEBUG, " total size %u\n", th->size);
1736 th->notify = notify;
1737 th->notify_cls = notify_cls;
1738 add_to_queue (channel->cadet, th);
1739 if (NULL != channel->cadet->th)
1741 if (GNUNET_NO == channel->allow_send)
1743 LOG (GNUNET_ERROR_TYPE_DEBUG, " call client notify tmt rdy\n");
1744 channel->cadet->th =
1745 GNUNET_CLIENT_notify_transmit_ready (channel->cadet->client, th->size,
1746 GNUNET_TIME_UNIT_FOREVER_REL,
1747 GNUNET_YES, &send_callback,
1749 LOG (GNUNET_ERROR_TYPE_DEBUG, "CADET NOTIFY TRANSMIT READY END\n");
1755 GNUNET_CADET_notify_transmit_ready_cancel (struct GNUNET_CADET_TransmitHandle *th)
1757 struct GNUNET_CADET_Handle *cadet;
1759 th->channel->packet_size = 0;
1760 cadet = th->channel->cadet;
1761 if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1762 GNUNET_SCHEDULER_cancel (th->timeout_task);
1763 GNUNET_CONTAINER_DLL_remove (cadet->th_head, cadet->th_tail, th);
1765 if ((0 == message_ready_size (cadet)) && (NULL != cadet->th))
1767 /* queue empty, no point in asking for transmission */
1768 GNUNET_CLIENT_notify_transmit_ready_cancel (cadet->th);
1775 GNUNET_CADET_receive_done (struct GNUNET_CADET_Channel *channel)
1782 send_info_request (struct GNUNET_CADET_Handle *h, uint16_t type)
1784 struct GNUNET_MessageHeader msg;
1786 msg.size = htons (sizeof (msg));
1787 msg.type = htons (type);
1788 send_packet (h, &msg, NULL);
1793 * Request a debug dump on the service's STDERR.
1795 * WARNING: unstable API, likely to change in the future!
1797 * @param h cadet handle
1800 GNUNET_CADET_request_dump (struct GNUNET_CADET_Handle *h)
1802 LOG (GNUNET_ERROR_TYPE_DEBUG, "requesting dump\n");
1803 send_info_request (h, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP);
1808 * Request information about peers known to the running cadet service.
1809 * The callback will be called for every peer known to the service.
1810 * Only one info request (of any kind) can be active at once.
1813 * WARNING: unstable API, likely to change in the future!
1815 * @param h Handle to the cadet peer.
1816 * @param callback Function to call with the requested data.
1817 * @param callback_cls Closure for @c callback.
1819 * @return #GNUNET_OK / #GNUNET_SYSERR
1822 GNUNET_CADET_get_peers (struct GNUNET_CADET_Handle *h,
1823 GNUNET_CADET_PeersCB callback,
1826 if (NULL != h->info_cb.peers_cb)
1829 return GNUNET_SYSERR;
1831 send_info_request (h, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
1832 h->info_cb.peers_cb = callback;
1833 h->info_cls = callback_cls;
1839 * Cancel a peer info request. The callback will not be called (anymore).
1841 * WARNING: unstable API, likely to change in the future!
1843 * @param h Cadet handle.
1845 * @return Closure given to GNUNET_CADET_get_peers.
1848 GNUNET_CADET_get_peers_cancel (struct GNUNET_CADET_Handle *h)
1853 h->info_cb.peers_cb = NULL;
1860 * Request information about a peer known to the running cadet peer.
1861 * The callback will be called for the tunnel once.
1862 * Only one info request (of any kind) can be active at once.
1864 * WARNING: unstable API, likely to change in the future!
1866 * @param h Handle to the cadet peer.
1867 * @param id Peer whose tunnel to examine.
1868 * @param callback Function to call with the requested data.
1869 * @param callback_cls Closure for @c callback.
1871 * @return #GNUNET_OK / #GNUNET_SYSERR
1874 GNUNET_CADET_get_peer (struct GNUNET_CADET_Handle *h,
1875 const struct GNUNET_PeerIdentity *id,
1876 GNUNET_CADET_PeerCB callback,
1879 struct GNUNET_CADET_LocalInfo msg;
1881 if (NULL != h->info_cb.peer_cb)
1884 return GNUNET_SYSERR;
1887 memset (&msg, 0, sizeof (msg));
1888 msg.header.size = htons (sizeof (msg));
1889 msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
1891 send_packet (h, &msg.header, NULL);
1892 h->info_cb.peer_cb = callback;
1893 h->info_cls = callback_cls;
1899 * Request information about tunnels of the running cadet peer.
1900 * The callback will be called for every tunnel of the service.
1901 * Only one info request (of any kind) can be active at once.
1903 * WARNING: unstable API, likely to change in the future!
1905 * @param h Handle to the cadet peer.
1906 * @param callback Function to call with the requested data.
1907 * @param callback_cls Closure for @c callback.
1909 * @return #GNUNET_OK / #GNUNET_SYSERR
1912 GNUNET_CADET_get_tunnels (struct GNUNET_CADET_Handle *h,
1913 GNUNET_CADET_TunnelsCB callback,
1916 if (NULL != h->info_cb.tunnels_cb)
1919 return GNUNET_SYSERR;
1921 send_info_request (h, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
1922 h->info_cb.tunnels_cb = callback;
1923 h->info_cls = callback_cls;
1929 * Cancel a monitor request. The monitor callback will not be called.
1931 * @param h Cadet handle.
1933 * @return Closure given to GNUNET_CADET_get_tunnels.
1936 GNUNET_CADET_get_tunnels_cancel (struct GNUNET_CADET_Handle *h)
1940 h->info_cb.tunnels_cb = NULL;
1950 * Request information about a tunnel of the running cadet peer.
1951 * The callback will be called for the tunnel once.
1952 * Only one info request (of any kind) can be active at once.
1954 * WARNING: unstable API, likely to change in the future!
1956 * @param h Handle to the cadet peer.
1957 * @param id Peer whose tunnel to examine.
1958 * @param callback Function to call with the requested data.
1959 * @param callback_cls Closure for @c callback.
1961 * @return #GNUNET_OK / #GNUNET_SYSERR
1964 GNUNET_CADET_get_tunnel (struct GNUNET_CADET_Handle *h,
1965 const struct GNUNET_PeerIdentity *id,
1966 GNUNET_CADET_TunnelCB callback,
1969 struct GNUNET_CADET_LocalInfo msg;
1971 if (NULL != h->info_cb.tunnel_cb)
1974 return GNUNET_SYSERR;
1977 memset (&msg, 0, sizeof (msg));
1978 msg.header.size = htons (sizeof (msg));
1979 msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1981 send_packet (h, &msg.header, NULL);
1982 h->info_cb.tunnel_cb = callback;
1983 h->info_cls = callback_cls;
1989 * Request information about a specific channel of the running cadet peer.
1991 * WARNING: unstable API, likely to change in the future!
1992 * FIXME Add destination option.
1994 * @param h Handle to the cadet peer.
1995 * @param initiator ID of the owner of the channel.
1996 * @param channel_number Channel number.
1997 * @param callback Function to call with the requested data.
1998 * @param callback_cls Closure for @c callback.
2000 * @return #GNUNET_OK / #GNUNET_SYSERR
2003 GNUNET_CADET_show_channel (struct GNUNET_CADET_Handle *h,
2004 struct GNUNET_PeerIdentity *initiator,
2005 unsigned int channel_number,
2006 GNUNET_CADET_ChannelCB callback,
2009 struct GNUNET_CADET_LocalInfo msg;
2011 if (NULL != h->info_cb.channel_cb)
2014 return GNUNET_SYSERR;
2017 msg.header.size = htons (sizeof (msg));
2018 msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL);
2019 msg.peer = *initiator;
2020 msg.channel_id = htonl (channel_number);
2021 // msg.reserved = 0;
2022 send_packet (h, &msg.header, NULL);
2023 h->info_cb.channel_cb = callback;
2024 h->info_cls = callback_cls;
2030 * Function called to notify a client about the connection
2031 * begin ready to queue more data. "buf" will be
2032 * NULL and "size" zero if the connection was closed for
2033 * writing in the meantime.
2035 * @param cls closure
2036 * @param size number of bytes available in buf
2037 * @param buf where the callee should write the message
2038 * @return number of bytes written to buf
2041 cadet_mq_ntr (void *cls, size_t size,
2044 struct GNUNET_MQ_Handle *mq = cls;
2045 struct CadetMQState *state = GNUNET_MQ_impl_state (mq);
2046 const struct GNUNET_MessageHeader *msg = GNUNET_MQ_impl_current (mq);
2052 GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_WRITE);
2055 msize = ntohs (msg->size);
2056 GNUNET_assert (msize <= size);
2057 memcpy (buf, msg, msize);
2058 GNUNET_MQ_impl_send_continue (mq);
2064 * Signature of functions implementing the
2065 * sending functionality of a message queue.
2067 * @param mq the message queue
2068 * @param msg the message to send
2069 * @param impl_state state of the implementation
2072 cadet_mq_send_impl (struct GNUNET_MQ_Handle *mq,
2073 const struct GNUNET_MessageHeader *msg, void *impl_state)
2075 struct CadetMQState *state = impl_state;
2077 GNUNET_assert (NULL == state->th);
2079 GNUNET_CADET_notify_transmit_ready (state->channel,
2080 /* FIXME: add option for corking */
2082 GNUNET_TIME_UNIT_FOREVER_REL,
2090 * Signature of functions implementing the
2091 * destruction of a message queue.
2092 * Implementations must not free 'mq', but should
2093 * take care of 'impl_state'.
2095 * @param mq the message queue to destroy
2096 * @param impl_state state of the implementation
2099 cadet_mq_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
2101 struct CadetMQState *state = impl_state;
2103 if (NULL != state->th)
2104 GNUNET_CADET_notify_transmit_ready_cancel (state->th);
2106 GNUNET_free (state);
2111 * Create a message queue for a cadet channel.
2112 * The message queue can only be used to transmit messages,
2113 * not to receive them.
2115 * @param channel the channel to create the message qeue for
2116 * @return a message queue to messages over the channel
2118 struct GNUNET_MQ_Handle *
2119 GNUNET_CADET_mq_create (struct GNUNET_CADET_Channel *channel)
2121 struct GNUNET_MQ_Handle *mq;
2122 struct CadetMQState *state;
2124 state = GNUNET_new (struct CadetMQState);
2125 state->channel = channel;
2127 mq = GNUNET_MQ_queue_for_callbacks (cadet_mq_send_impl,
2128 cadet_mq_destroy_impl,
2129 NULL, /* FIXME: cancel impl. */
2131 NULL, /* no msg handlers */
2132 NULL, /* no err handlers */
2133 NULL); /* no handler cls */