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3 (C) 2013 Christian Grothoff (and other contributing authors)
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22 * @file conversation/conversation_api_call.c
23 * @brief call API to the conversation service
24 * @author Simon Dieterle
25 * @author Andreas Fuchs
26 * @author Christian Grothoff
29 #include "gnunet_conversation_service.h"
30 #include "gnunet_gnsrecord_lib.h"
31 #include "gnunet_gns_service.h"
32 #include "conversation.h"
36 * Possible states of the phone.
41 * We still need to lookup the callee.
46 * The call is ringing.
51 * The call is in an active conversation.
56 * The call is in termination.
61 * The call was suspended by the caller.
66 * The call was suspended by the callee.
71 * The call was suspended by both caller and callee.
78 * Handle for an outgoing call.
80 struct GNUNET_CONVERSATION_Call
86 const struct GNUNET_CONFIGURATION_Handle *cfg;
89 * Handle to talk with CONVERSATION service.
91 struct GNUNET_CLIENT_Connection *client;
94 * Our caller identity.
96 struct GNUNET_IDENTITY_Ego *caller_id;
99 * Target callee as a GNS address/name.
106 struct GNUNET_SPEAKER_Handle *speaker;
111 struct GNUNET_MICROPHONE_Handle *mic;
114 * Function to call with events.
116 GNUNET_CONVERSATION_CallEventHandler event_handler;
119 * Closure for @e event_handler
121 void *event_handler_cls;
124 * Handle for transmitting to the CONVERSATION service.
126 struct GNUNET_MQ_Handle *mq;
129 * Connection to GNS (can be NULL).
131 struct GNUNET_GNS_Handle *gns;
134 * Active GNS lookup (or NULL).
136 struct GNUNET_GNS_LookupRequest *gns_lookup;
139 * Target phone record, only valid after the lookup is done.
141 struct GNUNET_CONVERSATION_PhoneRecord phone_record;
144 * State machine for the call.
146 enum CallState state;
152 * The call got disconnected, reconnect to the service.
154 * @param call call to reconnect
157 reconnect_call (struct GNUNET_CONVERSATION_Call *call);
161 * Process recorded audio data.
163 * @param cls closure with the `struct GNUNET_CONVERSATION_Call`
164 * @param data_size number of bytes in @a data
165 * @param data audio data to play
168 transmit_call_audio (void *cls,
172 struct GNUNET_CONVERSATION_Call *call = cls;
173 struct GNUNET_MQ_Envelope *e;
174 struct ClientAudioMessage *am;
176 GNUNET_assert (CS_ACTIVE == call->state);
177 e = GNUNET_MQ_msg_extra (am,
179 GNUNET_MESSAGE_TYPE_CONVERSATION_CS_AUDIO);
180 memcpy (&am[1], data, data_size);
181 GNUNET_MQ_send (call->mq, e);
186 * We received a `struct ClientPhoneSuspendMessage`
188 * @param cls the `struct GNUNET_CONVERSATION_Call`
189 * @param msg the message
192 handle_call_suspend (void *cls,
193 const struct GNUNET_MessageHeader *msg)
195 struct GNUNET_CONVERSATION_Call *call = cls;
201 reconnect_call (call);
205 reconnect_call (call);
207 case CS_SUSPENDED_CALLER:
208 call->state = CS_SUSPENDED_BOTH;
209 call->event_handler (call->event_handler_cls,
210 GNUNET_CONVERSATION_EC_CALL_SUSPENDED);
212 case CS_SUSPENDED_CALLEE:
213 case CS_SUSPENDED_BOTH:
217 call->state = CS_SUSPENDED_CALLEE;
218 call->event_handler (call->event_handler_cls,
219 GNUNET_CONVERSATION_EC_CALL_SUSPENDED);
220 call->speaker->disable_speaker (call->speaker->cls);
221 call->mic->disable_microphone (call->mic->cls);
224 GNUNET_CONVERSATION_call_stop (call);
231 * We received a `struct ClientPhoneResumeMessage`
233 * @param cls the `struct GNUNET_CONVERSATION_Call`
234 * @param msg the message
237 handle_call_resume (void *cls,
238 const struct GNUNET_MessageHeader *msg)
240 struct GNUNET_CONVERSATION_Call *call = cls;
246 reconnect_call (call);
250 reconnect_call (call);
252 case CS_SUSPENDED_CALLER:
255 case CS_SUSPENDED_CALLEE:
256 call->state = CS_ACTIVE;
257 call->speaker->enable_speaker (call->speaker->cls);
258 call->mic->enable_microphone (call->mic->cls,
259 &transmit_call_audio,
261 call->event_handler (call->event_handler_cls,
262 GNUNET_CONVERSATION_EC_CALL_RESUMED);
264 case CS_SUSPENDED_BOTH:
265 call->state = CS_SUSPENDED_CALLER;
266 call->event_handler (call->event_handler_cls,
267 GNUNET_CONVERSATION_EC_CALL_RESUMED);
273 GNUNET_CONVERSATION_call_stop (call);
280 * We received a `struct ClientPhonePickedupMessage`
282 * @param cls the `struct GNUNET_CONVERSATION_Call`
283 * @param msg the message
286 handle_call_picked_up (void *cls,
287 const struct GNUNET_MessageHeader *msg)
289 struct GNUNET_CONVERSATION_Call *call = cls;
295 reconnect_call (call);
298 call->state = CS_ACTIVE;
299 call->speaker->enable_speaker (call->speaker->cls);
300 call->mic->enable_microphone (call->mic->cls,
301 &transmit_call_audio,
303 call->event_handler (call->event_handler_cls,
304 GNUNET_CONVERSATION_EC_CALL_PICKED_UP);
306 case CS_SUSPENDED_CALLER:
307 case CS_SUSPENDED_CALLEE:
308 case CS_SUSPENDED_BOTH:
311 reconnect_call (call);
314 GNUNET_CONVERSATION_call_stop (call);
321 * We received a `struct ClientPhoneHangupMessage`
323 * @param cls the `struct GNUNET_CONVERSATION_Call`
324 * @param msg the message
327 handle_call_hangup (void *cls,
328 const struct GNUNET_MessageHeader *msg)
330 struct GNUNET_CONVERSATION_Call *call = cls;
336 reconnect_call (call);
339 case CS_SUSPENDED_CALLER:
340 case CS_SUSPENDED_CALLEE:
341 case CS_SUSPENDED_BOTH:
343 call->event_handler (call->event_handler_cls,
344 GNUNET_CONVERSATION_EC_CALL_HUNG_UP);
345 GNUNET_CONVERSATION_call_stop (call);
348 GNUNET_CONVERSATION_call_stop (call);
355 * We received a `struct ClientAudioMessage`
357 * @param cls the `struct GNUNET_CONVERSATION_Call`
358 * @param msg the message
361 handle_call_audio_message (void *cls,
362 const struct GNUNET_MessageHeader *msg)
364 struct GNUNET_CONVERSATION_Call *call = cls;
365 const struct ClientAudioMessage *am;
367 am = (const struct ClientAudioMessage *) msg;
372 reconnect_call (call);
376 reconnect_call (call);
378 case CS_SUSPENDED_CALLER:
379 /* can happen: we suspended, other peer did not yet
382 case CS_SUSPENDED_CALLEE:
383 case CS_SUSPENDED_BOTH:
384 /* can (rarely) also happen: other peer suspended, but mesh might
385 have had delayed data on the unreliable channel */
388 call->speaker->play (call->speaker->cls,
389 ntohs (msg->size) - sizeof (struct ClientAudioMessage),
393 GNUNET_CONVERSATION_call_stop (call);
400 * Iterator called on obtained result for a GNS lookup.
402 * @param cls closure with the `struct GNUNET_CONVERSATION_Call`
403 * @param rd_count number of records in @a rd
404 * @param rd the records in reply
407 handle_gns_response (void *cls,
409 const struct GNUNET_GNSRECORD_Data *rd)
411 struct GNUNET_CONVERSATION_Call *call = cls;
413 struct GNUNET_MQ_Envelope *e;
414 struct ClientCallMessage *ccm;
416 call->gns_lookup = NULL;
417 for (i=0;i<rd_count;i++)
419 if (GNUNET_GNSRECORD_TYPE_PHONE == rd[i].record_type)
421 if (rd[i].data_size != sizeof (struct GNUNET_CONVERSATION_PhoneRecord))
426 memcpy (&call->phone_record,
429 e = GNUNET_MQ_msg (ccm, GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_CALL);
430 ccm->line = call->phone_record.line;
431 ccm->target = call->phone_record.peer;
432 ccm->caller_id = *GNUNET_IDENTITY_ego_get_private_key (call->caller_id);
433 GNUNET_MQ_send (call->mq, e);
434 call->state = CS_RINGING;
435 call->event_handler (call->event_handler_cls,
436 GNUNET_CONVERSATION_EC_CALL_RINGING);
441 call->event_handler (call->event_handler_cls,
442 GNUNET_CONVERSATION_EC_CALL_GNS_FAIL);
443 GNUNET_CONVERSATION_call_stop (call);
448 * We encountered an error talking with the conversation service.
450 * @param cls the `struct GNUNET_CONVERSATION_Call`
451 * @param error details about the error
454 call_error_handler (void *cls,
455 enum GNUNET_MQ_Error error)
457 struct GNUNET_CONVERSATION_Call *call = cls;
459 if (CS_SHUTDOWN == call->state)
461 GNUNET_CONVERSATION_call_stop (call);
464 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
465 _("Connection to conversation service lost, trying to reconnect\n"));
466 reconnect_call (call);
471 * The call got disconnected, reconnect to the service.
473 * @param call call to reconnect
476 reconnect_call (struct GNUNET_CONVERSATION_Call *call)
478 static struct GNUNET_MQ_MessageHandler handlers[] =
480 { &handle_call_suspend,
481 GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_SUSPEND,
482 sizeof (struct ClientPhoneSuspendMessage) },
483 { &handle_call_resume,
484 GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_RESUME,
485 sizeof (struct ClientPhoneResumeMessage) },
486 { &handle_call_picked_up,
487 GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_PICKED_UP,
488 sizeof (struct ClientPhonePickedupMessage) },
489 { &handle_call_hangup,
490 GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_HANG_UP,
491 sizeof (struct ClientPhoneHangupMessage) },
492 { &handle_call_audio_message,
493 GNUNET_MESSAGE_TYPE_CONVERSATION_CS_AUDIO,
497 struct GNUNET_CRYPTO_EcdsaPublicKey my_zone;
499 if (CS_ACTIVE == call->state)
501 call->speaker->disable_speaker (call->speaker->cls);
502 call->mic->disable_microphone (call->mic->cls);
504 if (NULL != call->mq)
506 GNUNET_MQ_destroy (call->mq);
509 if (NULL != call->client)
511 GNUNET_CLIENT_disconnect (call->client);
514 call->state = CS_SHUTDOWN;
515 call->client = GNUNET_CLIENT_connect ("conversation", call->cfg);
516 if (NULL == call->client)
518 call->mq = GNUNET_MQ_queue_for_connection_client (call->client,
522 call->state = CS_LOOKUP;
523 GNUNET_IDENTITY_ego_get_public_key (call->caller_id,
525 call->gns_lookup = GNUNET_GNS_lookup (call->gns,
528 GNUNET_GNSRECORD_TYPE_PHONE,
530 NULL /* FIXME: add shortening support */,
531 &handle_gns_response, call);
532 GNUNET_assert (NULL != call->gns_lookup);
537 * Call the phone of another user.
539 * @param cfg configuration to use, specifies our phone service
540 * @param caller_id identity of the caller
541 * @param callee GNS name of the callee (used to locate the callee's record)
542 * @param speaker speaker to use (will be used automatically immediately once the
543 * #GNUNET_CONVERSATION_EC_CALL_PICKED_UP event is generated); we will NOT generate
544 * a ring tone on the speaker
545 * @param mic microphone to use (will be used automatically immediately once the
546 * #GNUNET_CONVERSATION_EC_CALL_PICKED_UP event is generated)
547 * @param event_handler how to notify the owner of the phone about events
548 * @param event_handler_cls closure for @a event_handler
550 struct GNUNET_CONVERSATION_Call *
551 GNUNET_CONVERSATION_call_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
552 struct GNUNET_IDENTITY_Ego *caller_id,
554 struct GNUNET_SPEAKER_Handle *speaker,
555 struct GNUNET_MICROPHONE_Handle *mic,
556 GNUNET_CONVERSATION_CallEventHandler event_handler,
557 void *event_handler_cls)
559 struct GNUNET_CONVERSATION_Call *call;
561 call = GNUNET_new (struct GNUNET_CONVERSATION_Call);
563 call->caller_id = caller_id;
564 call->callee = GNUNET_strdup (callee);
565 call->speaker = speaker;
567 call->event_handler = event_handler;
568 call->event_handler_cls = event_handler_cls;
569 call->gns = GNUNET_GNS_connect (cfg);
570 reconnect_call (call);
572 if ( (NULL == call->client) ||
573 (NULL == call->gns) )
575 GNUNET_CONVERSATION_call_stop (call);
583 * We've sent the hang up message, now finish terminating the call.
585 * @param cls the `struct GNUNET_CONVERSATION_Call` to terminate
588 finish_stop (void *cls)
590 struct GNUNET_CONVERSATION_Call *call = cls;
592 GNUNET_assert (CS_SHUTDOWN == call->state);
593 GNUNET_CONVERSATION_call_stop (call);
598 * Terminate a call. The call may be ringing or ready at this time.
600 * @param call call to terminate
603 GNUNET_CONVERSATION_call_stop (struct GNUNET_CONVERSATION_Call *call)
605 struct GNUNET_MQ_Envelope *e;
606 struct ClientPhoneHangupMessage *hang;
608 if ( (NULL != call->speaker) &&
609 (CS_ACTIVE == call->state) )
610 call->speaker->disable_speaker (call->speaker->cls);
611 if ( (NULL != call->mic) &&
612 (CS_ACTIVE == call->state) )
613 call->mic->disable_microphone (call->mic->cls);
614 if (CS_SHUTDOWN != call->state)
616 call->state = CS_SHUTDOWN;
617 e = GNUNET_MQ_msg (hang, GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_HANG_UP);
618 GNUNET_MQ_notify_sent (e, &finish_stop, call);
619 GNUNET_MQ_send (call->mq, e);
622 if (NULL != call->mq)
624 GNUNET_MQ_destroy (call->mq);
627 if (NULL != call->client)
629 GNUNET_CLIENT_disconnect (call->client);
632 if (NULL != call->gns_lookup)
634 GNUNET_GNS_lookup_cancel (call->gns_lookup);
635 call->gns_lookup = NULL;
637 if (NULL != call->gns)
639 GNUNET_GNS_disconnect (call->gns);
642 GNUNET_free (call->callee);
648 * Pause a call. Temporarily suspends the use of speaker and
651 * @param call call to pause
654 GNUNET_CONVERSATION_call_suspend (struct GNUNET_CONVERSATION_Call *call)
656 struct GNUNET_MQ_Envelope *e;
657 struct ClientPhoneSuspendMessage *suspend;
659 GNUNET_assert ( (CS_SUSPENDED_CALLEE == call->state) ||
660 (CS_ACTIVE == call->state) );
661 if (CS_ACTIVE == call->state)
663 call->speaker->disable_speaker (call->speaker->cls);
664 call->mic->disable_microphone (call->mic->cls);
666 call->speaker = NULL;
668 e = GNUNET_MQ_msg (suspend, GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_SUSPEND);
669 GNUNET_MQ_send (call->mq, e);
670 if (CS_SUSPENDED_CALLER == call->state)
671 call->state = CS_SUSPENDED_BOTH;
673 call->state = CS_SUSPENDED_CALLER;
678 * Resumes a call after #GNUNET_CONVERSATION_call_suspend.
680 * @param call call to resume
681 * @param speaker speaker to use
682 * a ring tone on the speaker
683 * @param mic microphone to use
686 GNUNET_CONVERSATION_call_resume (struct GNUNET_CONVERSATION_Call *call,
687 struct GNUNET_SPEAKER_Handle *speaker,
688 struct GNUNET_MICROPHONE_Handle *mic)
690 struct GNUNET_MQ_Envelope *e;
691 struct ClientPhoneResumeMessage *resume;
693 GNUNET_assert ( (CS_SUSPENDED_CALLER == call->state) ||
694 (CS_SUSPENDED_BOTH == call->state) );
695 e = GNUNET_MQ_msg (resume, GNUNET_MESSAGE_TYPE_CONVERSATION_CS_PHONE_RESUME);
696 GNUNET_MQ_send (call->mq, e);
697 call->speaker = speaker;
699 if (CS_SUSPENDED_CALLER == call->state)
701 call->state = CS_ACTIVE;
702 call->speaker->enable_speaker (call->speaker->cls);
703 call->mic->enable_microphone (call->mic->cls,
704 &transmit_call_audio,
709 call->state = CS_SUSPENDED_CALLEE;
714 /* end of conversation_api_call.c */