summaryrefslogtreecommitdiffstats
path: root/joinpbx.cpp
blob: 4b0654013d49121edd05587601627a46c6d1c3d9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
/*****************************************************************************\
**                                                                           **
** Linux Call Router                                                         **
**                                                                           **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg                                              **
**                                                                           **
** join functions                                                            **
**                                                                           **
\*****************************************************************************/ 

#include "main.h"
//#define __u8 unsigned char
//#define __u16 unsigned short
//#define __u32 unsigned int


/* notify endpoint about state change (if any) */
static int notify_state_change(int join_id, int epoint_id, int old_state, int new_state)
{
	int notify_off = 0, notify_on = 0;
	struct lcr_msg *message;

	if (old_state == new_state)
		return(old_state);

	switch(old_state) {
		case NOTIFY_STATE_ACTIVE:
		switch(new_state) {
			case NOTIFY_STATE_HOLD:
			notify_on = INFO_NOTIFY_REMOTE_HOLD;
			break;
			case NOTIFY_STATE_SUSPEND:
			notify_on = INFO_NOTIFY_USER_SUSPENDED;
			break;
			case NOTIFY_STATE_CONFERENCE:
			notify_on = INFO_NOTIFY_CONFERENCE_ESTABLISHED;
			break;
		}
		break;

		case NOTIFY_STATE_HOLD:
		switch(new_state) {
			case NOTIFY_STATE_ACTIVE:
			notify_off = INFO_NOTIFY_REMOTE_RETRIEVAL;
			break;
			case NOTIFY_STATE_SUSPEND:
			notify_off = INFO_NOTIFY_REMOTE_RETRIEVAL;
			notify_on = INFO_NOTIFY_USER_SUSPENDED;
			break;
			case NOTIFY_STATE_CONFERENCE:
			notify_off = INFO_NOTIFY_REMOTE_RETRIEVAL;
			notify_on = INFO_NOTIFY_CONFERENCE_ESTABLISHED;
			break;
		}
		break;

		case NOTIFY_STATE_SUSPEND:
		switch(new_state) {
			case NOTIFY_STATE_ACTIVE:
			notify_off = INFO_NOTIFY_USER_RESUMED;
			break;
			case NOTIFY_STATE_HOLD:
			notify_off = INFO_NOTIFY_USER_RESUMED;
			notify_on = INFO_NOTIFY_REMOTE_HOLD;
			break;
			case NOTIFY_STATE_CONFERENCE:
			notify_off = INFO_NOTIFY_USER_RESUMED;
			notify_on = INFO_NOTIFY_CONFERENCE_ESTABLISHED;
			break;
		}
		break;

		case NOTIFY_STATE_CONFERENCE:
		switch(new_state) {
			case NOTIFY_STATE_ACTIVE:
			notify_off = INFO_NOTIFY_CONFERENCE_DISCONNECTED;
			break;
			case NOTIFY_STATE_HOLD:
			notify_off = INFO_NOTIFY_CONFERENCE_DISCONNECTED;
			notify_on = INFO_NOTIFY_REMOTE_HOLD;
			break;
			case NOTIFY_STATE_SUSPEND:
			notify_off = INFO_NOTIFY_CONFERENCE_DISCONNECTED;
			notify_on = INFO_NOTIFY_USER_SUSPENDED;
			break;
		}
		break;
	}

	if (join_id && notify_off) {
		message = message_create(join_id, epoint_id, JOIN_TO_EPOINT, MESSAGE_NOTIFY);
		message->param.notifyinfo.notify = notify_off;
		message_put(message);
	}

	if (join_id && notify_on) {
		message = message_create(join_id, epoint_id, JOIN_TO_EPOINT, MESSAGE_NOTIFY);
		message->param.notifyinfo.notify = notify_on;
		message_put(message);
	}

	return(new_state);
}


/* debug function for join */
void joinpbx_debug(class JoinPBX *joinpbx, const char *function)
{
	struct join_relation *relation;
	struct port_list *portlist;
	class Endpoint *epoint;
	class Port *port;
	char buffer[512];

	if (!(options.deb & DEBUG_JOIN))
		return;

	PDEBUG(DEBUG_JOIN, "join(%d) start (called from %s)\n", joinpbx->j_serial, function);

	relation = joinpbx->j_relation;

	if (!relation)
		PDEBUG(DEBUG_JOIN, "join has no relations\n");
	while(relation) {
		epoint = find_epoint_id(relation->epoint_id);
		if (!epoint) {
			PDEBUG(DEBUG_JOIN, "warning: relations epoint id=%d doesn't exists!\n", relation->epoint_id);
			relation = relation->next;
			continue;
		}
		buffer[0] = '\0';
		UPRINT(strchr(buffer,0), "*** ep%d", relation->epoint_id);
		UPRINT(strchr(buffer,0), " ifs=");
		portlist = epoint->ep_portlist;
		while(portlist) {
			port = find_port_id(portlist->port_id);
			if (port)
				UPRINT(strchr(buffer,0), "%s,", port->p_name);
			else
				UPRINT(strchr(buffer,0), "<port %d doesn't exist>,", portlist->port_id);
			portlist = portlist->next;
		}
//		UPRINT(strchr(buffer,0), " endpoint=%d on=%s hold=%s", epoint->ep_serial, (epoint->ep_join_id==joinpbx->j_serial)?"yes":"no", (epoint->get_hold_id()==joinpbx->j_serial)?"yes":"no");
		UPRINT(strchr(buffer,0), " endpoint=%d on=%s", epoint->ep_serial, (epoint->ep_join_id==joinpbx->j_serial)?"yes":"no");
		switch(relation->type) {
			case RELATION_TYPE_CALLING:
			UPRINT(strchr(buffer,0), " type=CALLING");
			break;
			case RELATION_TYPE_SETUP:
			UPRINT(strchr(buffer,0), " type=SETUP");
			break;
			case RELATION_TYPE_CONNECT:
			UPRINT(strchr(buffer,0), " type=CONNECT");
			break;
			default:
			UPRINT(strchr(buffer,0), " type=unknown");
			break;
		}
		if (relation->channel_state)
			UPRINT(strchr(buffer,0), " channel=CONNECT");
		else
			UPRINT(strchr(buffer,0), " channel=HOLD");
		switch(relation->tx_state) {
			case NOTIFY_STATE_ACTIVE:
			UPRINT(strchr(buffer,0), " tx_state=ACTIVE");
			break;
			case NOTIFY_STATE_HOLD:
			UPRINT(strchr(buffer,0), " tx_state=HOLD");
			break;
			case NOTIFY_STATE_SUSPEND:
			UPRINT(strchr(buffer,0), " tx_state=SUSPEND");
			break;
			case NOTIFY_STATE_CONFERENCE:
			UPRINT(strchr(buffer,0), " tx_state=CONFERENCE");
			break;
			default:
			UPRINT(strchr(buffer,0), " tx_state=unknown");
			break;
		}
		switch(relation->rx_state) {
			case NOTIFY_STATE_ACTIVE:
			UPRINT(strchr(buffer,0), " rx_state=ACTIVE");
			break;
			case NOTIFY_STATE_HOLD:
			UPRINT(strchr(buffer,0), " rx_state=HOLD");
			break;
			case NOTIFY_STATE_SUSPEND:
			UPRINT(strchr(buffer,0), " rx_state=SUSPEND");
			break;
			case NOTIFY_STATE_CONFERENCE:
			UPRINT(strchr(buffer,0), " rx_state=CONFERENCE");
			break;
			default:
			UPRINT(strchr(buffer,0), " rx_state=unknown");
			break;
		}
		PDEBUG(DEBUG_JOIN, "%s\n", buffer);
		relation = relation->next;
	}

	PDEBUG(DEBUG_JOIN, "end\n");
}

int update_bridge(struct lcr_work *work, void *instance, int index);

/*
 * constructor for a new join 
 * the join will have a relation to the calling endpoint
 */
JoinPBX::JoinPBX(class Endpoint *epoint) : Join()
{
	struct join_relation *relation;
//	char filename[256];

	if (!epoint)
		FATAL("epoint is NULL.\n");

	PDEBUG(DEBUG_JOIN, "creating new join and connecting it to the endpoint.\n");

	j_type = JOIN_TYPE_PBX;
	j_caller[0] = '\0';
	j_caller_id[0] = '\0';
	j_dialed[0] = '\0';
	j_todial[0] = '\0';
	j_pid = getpid();
	j_partyline = 0;
	j_partyline_jingle = 0;
	j_multicause = 0;
	j_multilocation = 0;
	memset(&j_updatebridge, 0, sizeof(j_updatebridge));
	add_work(&j_updatebridge, update_bridge, this, 0);

	/* initialize a relation only to the calling interface */
	relation = j_relation = (struct join_relation *)MALLOC(sizeof(struct join_relation));
	cmemuse++;
	relation->type = RELATION_TYPE_CALLING;
	relation->channel_state = 0; /* audio is assumed on a new join */
	relation->tx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	relation->rx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	relation->epoint_id = epoint->ep_serial;


	if (options.deb & DEBUG_JOIN)
		joinpbx_debug(this, "JoinPBX::Constructor(new join)");
}


/*
 * join descructor
 */
JoinPBX::~JoinPBX()
{
	struct join_relation *relation, *rtemp;

	relation = j_relation;
	while(relation) {
		rtemp = relation->next;
		FREE(relation, sizeof(struct join_relation));
		cmemuse--;
		relation = rtemp;
	}

	del_work(&j_updatebridge);
}


/* bridge sets the audio flow of all bchannels assiociated to 'this' join
 * also it changes and notifies active/hold/conference states
 */
int update_bridge(struct lcr_work *work, void *instance, int index)
{
	 class JoinPBX *joinpbx = (class JoinPBX *)instance;

	 joinpbx->bridge();

	 return 0;
}

void JoinPBX::bridge(void)
{
	struct join_relation *relation;
	struct lcr_msg *message;
	int numconnect = 0, relations = 0;
	class Endpoint *epoint;
	struct port_list *portlist;
	class Port *port;
#ifdef DEBUG_COREBRIDGE
	int allmISDN = 0; // never set for debug purpose
#else
	int allmISDN = 1; // set until a non-mISDN relation is found
#endif

	relation = j_relation;
	while(relation) {
		/* count all relations */
		relations++;

		/* check for relation's objects */
		epoint = find_epoint_id(relation->epoint_id);
		if (!epoint) {
			PERROR("software error: relation without existing endpoints.\n");
			relation = relation->next;
			continue;
		}
		portlist = epoint->ep_portlist;
		if (!portlist) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation without port object.\n", j_serial);
//#warning testing: keep on hold until single audio stream available
			relation->channel_state = 0;
			relation = relation->next;
			continue;
		}
		if (portlist->next) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation with ep%d due to port_list.\n", j_serial, epoint->ep_serial);
//#warning testing: keep on hold until single audio stream available
			relation->channel_state = 0;
			relation = relation->next;
			continue;
		}
		port = find_port_id(portlist->port_id);
		if (!port) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation without existing port object.\n", j_serial);
			relation = relation->next;
			continue;
		}
		if ((port->p_type&PORT_CLASS_MASK)!=PORT_CLASS_mISDN) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation ep%d because it's port is not mISDN.\n", j_serial, epoint->ep_serial);
			if (allmISDN) {
				PDEBUG(DEBUG_JOIN, "join%d not all endpoints are mISDN.\n", j_serial);
				allmISDN = 0;
			}
			relation = relation->next;
			continue;
		}
		
		relation = relation->next;
	}

	PDEBUG(DEBUG_JOIN, "join%d members=%d %s\n", j_serial, relations, (allmISDN)?"(all are mISDN-members)":"(not all are mISDN-members)");
	/* we notify all relations about rxdata. */
	relation = j_relation;
	while(relation) {
		/* count connected relations */
		if ((relation->channel_state == 1)
		 && (relation->rx_state != NOTIFY_STATE_SUSPEND)
		 && (relation->rx_state != NOTIFY_STATE_HOLD))
			numconnect ++;

		/* remove unconnected parties from conference, also remove remotely disconnected parties so conference will not be disturbed. */
		if (relation->channel_state == 1
		 && relation->rx_state != NOTIFY_STATE_HOLD
		 && relation->rx_state != NOTIFY_STATE_SUSPEND
		 && relations>1 // no conf with one member
		 && allmISDN) { // no conf if any member is not mISDN
			message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_mISDNSIGNAL);
			message->param.mISDNsignal.message = mISDNSIGNAL_CONF;
			message->param.mISDNsignal.conf = j_serial<<16 | j_pid;
			PDEBUG(DEBUG_JOIN, "join%d EP%d +on+ id: 0x%08x\n", j_serial, relation->epoint_id, message->param.mISDNsignal.conf);
			message_put(message);
		} else {
			message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_mISDNSIGNAL);
			message->param.mISDNsignal.message = mISDNSIGNAL_CONF;
			message->param.mISDNsignal.conf = 0;
			PDEBUG(DEBUG_JOIN, "join%d EP%d +off+ id: 0x%08x\n", j_serial, relation->epoint_id, message->param.mISDNsignal.conf);
			message_put(message);
		}

		/*
		 * request data from endpoint/port if:
		 * - two relations
		 * - any without mISDN
		 * in this case we bridge
		 */
		message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_mISDNSIGNAL);
		message->param.mISDNsignal.message = mISDNSIGNAL_JOINDATA;
		message->param.mISDNsignal.joindata = (relations==2 && !allmISDN);
		PDEBUG(DEBUG_JOIN, "join%d EP%d set joindata=%d\n", j_serial, relation->epoint_id, message->param.mISDNsignal.joindata);
		message_put(message);

		relation = relation->next;
	}

	/* two people just exchange their states */
	if (relations==2 && !j_partyline) {
		PDEBUG(DEBUG_JOIN, "join%d 2 relations / no partyline\n", j_serial);
		relation = j_relation;
		relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, relation->next->rx_state);
		relation->next->tx_state = notify_state_change(j_serial, relation->next->epoint_id, relation->next->tx_state, relation->rx_state);
	} else
	/* one member in a join, so we put her on hold */
	if ((relations==1 || numconnect==1)/* && !j_partyline_jingle*/) {
		PDEBUG(DEBUG_JOIN, "join%d 1 member or only 1 connected, put on hold\n", j_serial);
		relation = j_relation;
		while(relation) {
			if ((relation->channel_state == 1)
			 && (relation->rx_state != NOTIFY_STATE_SUSPEND)
			 && (relation->rx_state != NOTIFY_STATE_HOLD))
				relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, NOTIFY_STATE_HOLD);
			relation = relation->next;
		}
	} else {
	/* if conference/partyline (or more than two members and more than one is connected), so we set conference state */ 
		PDEBUG(DEBUG_JOIN, "join%d %d members, %d connected, signal conference\n", j_serial, relations, numconnect);
		relation = j_relation;
		while(relation) {
			if ((relation->channel_state == 1)
			 && (relation->rx_state != NOTIFY_STATE_SUSPEND)
			 && (relation->rx_state != NOTIFY_STATE_HOLD))
				relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, NOTIFY_STATE_CONFERENCE);
			relation = relation->next;
		}
	}
}

/*
 * bridging is only possible with two connected endpoints
 */
void JoinPBX::bridge_data(unsigned int epoint_from, struct join_relation *relation_from, union parameter *param)
{
	struct join_relation *relation_to;

	/* if we are alone */
	if (!j_relation->next)
		return;

	/* if we are more than two */
	if (j_relation->next->next)
		return;

	/* skip if source endpoint has NOT audio mode CONNECT */
	if (relation_from->channel_state != 1)
		return;

	/* get destination relation */
	relation_to = j_relation;
	if (relation_to == relation_from) {
		/* oops, we are the first, so destination is: */
		relation_to = relation_to->next;
	}

	/* skip if destination endpoint has NOT audio mode CONNECT */
	if (relation_to->channel_state != 1)
		return;

	/* now we may send our data to the endpoint where it
	 * will be delivered to the port
	 */
//printf("from %d, to %d\n", relation_from->epoint_id, relation_to->epoint_id);
	message_forward(j_serial, relation_to->epoint_id, JOIN_TO_EPOINT, param);
}

/* release join from endpoint
 * if the join has two relations, all relations are freed and the join will be
 * destroyed
 * on outgoing relations, the cause is collected, if not connected
 * returns if join has been destroyed
 */
int JoinPBX::release(struct join_relation *relation, int location, int cause)
{
	struct join_relation *reltemp, **relationpointer;
	struct lcr_msg *message;
	class Join *join;
	int destroy = 0;

	/* remove from bridge */
	if (relation->channel_state != 0) {
		relation->channel_state = 0;
		trigger_work(&j_updatebridge);
		// note: if join is not released, bridge must be updated
	}

	/* detach given interface */
	reltemp = j_relation;
	relationpointer = &j_relation;
	while(reltemp) {
		/* endpoint of function call */
		if (relation == reltemp)
			break;
		relationpointer = &reltemp->next;
		reltemp = reltemp->next;
	}
	if (!reltemp)
		FATAL("relation not in list of our relations. this must not happen.\n");
//printf("releasing relation %d\n", reltemp->epoint_id);
	*relationpointer = reltemp->next;
	FREE(reltemp, sizeof(struct join_relation));
	cmemuse--;
	relation = reltemp = NULL; // just in case of reuse fault;

	/* if no more relation */
	if (!j_relation) {
		PDEBUG(DEBUG_JOIN, "join is completely removed.\n");
		/* there is no more endpoint related to the join */
		destroy = 1;
		delete this;
		// end of join object!
		PDEBUG(DEBUG_JOIN, "join completely removed!\n");
	} else
	/* if join is a party line */
	if (j_partyline) {
		PDEBUG(DEBUG_JOIN, "join is a conference room, so we keep it alive until the last party left.\n");
	} else
	/* if only one relation left */
	if (!j_relation->next) {
		PDEBUG(DEBUG_JOIN, "join has one relation left, so we send it a release with the given cause %d.\n", cause);
		message = message_create(j_serial, j_relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_RELEASE);
		message->param.disconnectinfo.cause = cause;
		message->param.disconnectinfo.location = location;
		message_put(message);
		destroy = 1;
		delete this;
		// end of join object!
		PDEBUG(DEBUG_JOIN, "join completely removed!\n");
	}

	join = join_first;
	while(join) {
		if (options.deb & DEBUG_JOIN && join->j_type==JOIN_TYPE_PBX)
			joinpbx_debug((class JoinPBX *)join, "join_release{all joins left}");
		join = join->next;
	}
	PDEBUG(DEBUG_JOIN, "join_release(): ended.\n");
	return(destroy);
}

/* count number of relations in a join
 */
int joinpbx_countrelations(unsigned int join_id)
{
	struct join_relation *relation;
	int i;
	class Join *join;
	class JoinPBX *joinpbx;

	join = find_join_id(join_id);

	if (!join)
		return(0);

	if (join->j_type == JOIN_TYPE_REMOTE)
		return(2);

	if (join->j_type != JOIN_TYPE_PBX)
		return(0);
	joinpbx = (class JoinPBX *)join;

	i = 0;
	relation = joinpbx->j_relation;
	while(relation) {
		i++;
		relation = relation->next;
	}

	return(i);
}

/* check if one is calling and all other relations are setup-realations */
int joinpbx_onecalling_othersetup(struct join_relation *relation)
{
	int calling = 0, other = 0;

	while(relation) {
		switch(relation->type) {
		case RELATION_TYPE_CALLING:
			calling++;
			break;
		case RELATION_TYPE_SETUP:
			break;
		default:
			other++;
			break;
		}

		relation = relation->next;
	}

	if (calling == 1 && other == 0)
		return(1);
	return(0);
}

void JoinPBX::remove_relation(struct join_relation *relation)
{
	struct join_relation *temp, **tempp;

	if (!relation)
		return;

	temp = j_relation;
	tempp = &j_relation;
	while(temp) {
		if (temp == relation)
			break;
		tempp = &temp->next;
		temp = temp->next;
	}
	if (!temp) {
		PERROR("relation not in join.\n");
		return;
	}

	PDEBUG(DEBUG_JOIN, "removing relation.\n");
	*tempp = relation->next;
	FREE(temp, sizeof(struct join_relation));
	cmemuse--;
}	


struct join_relation *JoinPBX::add_relation(void)
{
	struct join_relation *relation;

	if (!j_relation) {
		PERROR("there is no first relation to this join\n");
		return(NULL);
	}
	relation = j_relation;
	while(relation->next)
		relation = relation->next;

	relation->next = (struct join_relation *)MALLOC(sizeof(struct join_relation));
	cmemuse++;
	/* the record pointer is set at the first time the data is received for the relation */

//	if (options.deb & DEBUG_JOIN)
//		joinpbx_debug(join, "add_relation");
	return(relation->next);
}

/* epoint sends a message to a join
 *
 */
void JoinPBX::message_epoint(unsigned int epoint_id, int message_type, union parameter *param)
{
	class Join *cl;
	struct join_relation *relation, *reltemp;
	int num;
	int new_state;
	struct lcr_msg *message;
//	int size, writesize, oldpointer;
	char *number, *numbers;

	if (!epoint_id) {
		PERROR("software error, epoint == NULL\n");
		return;
	}

//	if (options.deb & DEBUG_JOIN) {
//		PDEBUG(DEBUG_JOIN, "message %d received from ep%d.\n", message, epoint->ep_serial);
//		joinpbx_debug(join,"Join::message_epoint");
//	}
	if (options.deb & DEBUG_JOIN) {
		if (message_type != MESSAGE_DATA) {
			cl = join_first;
			while(cl) {
				if (cl->j_type == JOIN_TYPE_PBX)
					joinpbx_debug((class JoinPBX *)cl, "Join::message_epoint{all joins before processing}");
				cl = cl->next;
			}
		}
	}

	/* check relation */
	relation = j_relation;
	while(relation) {
		if (relation->epoint_id == epoint_id)
			break;
		relation = relation->next;
	}
	if (!relation) {
		PDEBUG(DEBUG_JOIN, "no relation back to the endpoint found, ignoring (join=%d, endpoint=%d)\n", j_serial, epoint_id);
		return;
	}

	/* count relations */
	num=joinpbx_countrelations(j_serial);

	/* process party line */
	if (message_type == MESSAGE_SETUP) if (param->setup.partyline && !j_partyline) {
		j_partyline = param->setup.partyline;
		j_partyline_jingle = param->setup.partyline_jingle;
	}
	if (j_partyline) {
		switch(message_type) {
			case MESSAGE_SETUP:
			PDEBUG(DEBUG_JOIN, "respsone with connect in partyline mode.\n");
			relation->type = RELATION_TYPE_CONNECT;
			message = message_create(j_serial, epoint_id, JOIN_TO_EPOINT, MESSAGE_CONNECT);
			SPRINT(message->param.connectinfo.id, "%d", j_partyline);
			message->param.connectinfo.ntype = INFO_NTYPE_UNKNOWN;
			message_put(message);
			trigger_work(&j_updatebridge);
			if (j_partyline_jingle)
			       play_jingle(1);
			break;
			
			case MESSAGE_AUDIOPATH:
			PDEBUG(DEBUG_JOIN, "join received channel message: %d.\n", param->audiopath);
			if (relation->channel_state != param->audiopath) {
				relation->channel_state = param->audiopath;
				trigger_work(&j_updatebridge);
				if (options.deb & DEBUG_JOIN)
					joinpbx_debug(this, "Join::message_epoint{after setting new channel state}");
			}
			break;

			case MESSAGE_DISCONNECT:
			PDEBUG(DEBUG_JOIN, "releasing after receiving disconnect, because join in partyline mode.\n");
			message = message_create(j_serial, epoint_id, JOIN_TO_EPOINT, MESSAGE_RELEASE);
			message->param.disconnectinfo.cause = CAUSE_NORMAL;
			message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
			message_put(message);
			// fall through

			case MESSAGE_RELEASE:
			PDEBUG(DEBUG_JOIN, "releasing from join\n");
			release(relation, 0, 0);
			if (j_partyline_jingle)
			       play_jingle(0);
			break;

			default:
			PDEBUG(DEBUG_JOIN, "ignoring message, because join in partyline mode.\n");
		}
		return;
	}


	/* process messages */
	switch(message_type) {
		/* process audio path message */
		case MESSAGE_AUDIOPATH:
		PDEBUG(DEBUG_JOIN, "join received channel message: %d.\n", param->audiopath);
		if (relation->channel_state != param->audiopath) {
			relation->channel_state = param->audiopath;
			trigger_work(&j_updatebridge);
			if (options.deb & DEBUG_JOIN)
				joinpbx_debug(this, "Join::message_epoint{after setting new channel state}");
		}
		return;

		/* track notify */
		case MESSAGE_NOTIFY:
		switch(param->notifyinfo.notify) {
			case INFO_NOTIFY_USER_SUSPENDED:
			case INFO_NOTIFY_USER_RESUMED:
			case INFO_NOTIFY_REMOTE_HOLD:
			case INFO_NOTIFY_REMOTE_RETRIEVAL:
			case INFO_NOTIFY_CONFERENCE_ESTABLISHED:
			case INFO_NOTIFY_CONFERENCE_DISCONNECTED:
			new_state = track_notify(relation->rx_state, param->notifyinfo.notify);
			if (new_state != relation->rx_state) {
				relation->rx_state = new_state;
				trigger_work(&j_updatebridge);
				if (options.deb & DEBUG_JOIN)
					joinpbx_debug(this, "Join::message_epoint{after setting new rx state}");
			}
			break;

			default:
			/* send notification to all other endpoints */
			reltemp = j_relation;
			while(reltemp) {
				if (reltemp->epoint_id!=epoint_id && reltemp->epoint_id) {
					message = message_create(j_serial, reltemp->epoint_id, JOIN_TO_EPOINT, MESSAGE_NOTIFY);
					memcpy(&message->param, param, sizeof(union parameter));
					message_put(message);
				}
				reltemp = reltemp->next;
			}
		}
		return;

		/* audio data */
		case MESSAGE_DATA:
		/* now send audio data to the other endpoint */
		bridge_data(epoint_id, relation, param);
		return;

		/* relations sends a connect */
		case MESSAGE_CONNECT:
		/* outgoing setup type becomes connected */
		if (relation->type == RELATION_TYPE_SETUP)
			relation->type = RELATION_TYPE_CONNECT;
		/* release other relations in setup state */
		release_again:
		reltemp = j_relation;
		while(reltemp) {
//printf("connect, checking relation %d\n", reltemp->epoint_id);
			if (reltemp->type == RELATION_TYPE_SETUP) {
//printf("relation %d is of type setup, releasing\n", reltemp->epoint_id);
				/* send release to endpoint */
				message = message_create(j_serial, reltemp->epoint_id, JOIN_TO_EPOINT, MESSAGE_RELEASE);
				message->param.disconnectinfo.cause = CAUSE_NONSELECTED;
				message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
				message_put(message);

				if (release(reltemp, LOCATION_PRIVATE_LOCAL, CAUSE_NORMAL)) // dummy cause, should not be used, since calling and connected endpoint still exist afterwards.
					return; // must return, because join IS destroyed
				goto release_again;
			}
			if (reltemp->type == RELATION_TYPE_CALLING)
				reltemp->type = RELATION_TYPE_CONNECT;
			reltemp = reltemp->next;
		}
		break; // continue with our message

		/* release is sent by endpoint */
		case MESSAGE_RELEASE:
		switch(relation->type) {
			case RELATION_TYPE_SETUP: /* by called */
			/* collect cause and send collected cause */
			collect_cause(&j_multicause, &j_multilocation, param->disconnectinfo.cause, param->disconnectinfo.location);
			if (j_multicause)
				release(relation, j_multilocation, j_multicause);
			else
				release(relation, LOCATION_PRIVATE_LOCAL, CAUSE_UNSPECIFIED);
			break;

			case RELATION_TYPE_CALLING: /* by calling */
			/* remove us, if we don't have a called releation yet */
			if (!j_relation->next) {
				release(j_relation, LOCATION_PRIVATE_LOCAL, CAUSE_NORMAL);
				return; // must return, because join IS destroyed
			}
			/* in a conf, we don't kill the other members */
			if (num > 2 && !joinpbx_onecalling_othersetup(j_relation)) {
				release(relation, 0, 0);
				return;
			}
			/* remove all relations that are of called type */
			release_again2:
			reltemp = j_relation;
			while(reltemp) {
				if (reltemp->type == RELATION_TYPE_SETUP) {
					/* send release to endpoint */
					message = message_create(j_serial, reltemp->epoint_id, JOIN_TO_EPOINT, message_type);
					memcpy(&message->param, param, sizeof(union parameter));
					message_put(message);

					if (release(reltemp, LOCATION_PRIVATE_LOCAL, CAUSE_NORMAL))
						return; // must return, because join IS destroyed
					goto release_again2;
				}
				reltemp = reltemp->next;
			}
			PERROR("we are still here, this should not happen\n");
			break;

			default: /* by connected */
			/* send current cause */
			release(relation, param->disconnectinfo.location, param->disconnectinfo.cause);
		}
		return; // must return, because join may be destroyed
	}

	/* check number of relations */
	if (num > 2 && !joinpbx_onecalling_othersetup(j_relation) && message_type != MESSAGE_CONNECT) {
		PDEBUG(DEBUG_JOIN, "we are in a conference, so we ignore the messages, except MESSAGE_CONNECT.\n");
		return;
	}

	/* if join has no other relation, we process the setup message */
	if (num == 1) {
		switch(message_type) {
			case MESSAGE_SETUP:
			if (param->setup.dialinginfo.itype == INFO_ITYPE_ISDN_EXTENSION) {
				/* in case of keypad */
				numbers = param->setup.dialinginfo.keypad;
				if (numbers[0]) {
					while((number = strsep(&numbers, ","))) {
						if (out_setup(epoint_id, message_type, param, NULL, number))
							return; // join destroyed
					}
					/* after keypad finish dialing */
					break;
				}
				/* dialed number */
				numbers = param->setup.dialinginfo.id;
				while((number = strsep(&numbers, ","))) {
					if (out_setup(epoint_id, message_type, param, number, NULL))
						return; // join destroyed
				}
				break;
			}
			if (out_setup(epoint_id, message_type, param, param->setup.dialinginfo.id, param->setup.dialinginfo.keypad))
				return; // join destroyed
			break;

			default:
			PDEBUG(DEBUG_JOIN, "no need to send a message because there is no other endpoint than the calling one.\n");
		}
	} else {
		/* sending message to other relation(s) */
		relation = j_relation;
		while(relation) {
			if (relation->epoint_id != epoint_id) {
				PDEBUG(DEBUG_JOIN, "sending message ep%ld -> ep%ld.\n", epoint_id, relation->epoint_id);
				message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, message_type);
				memcpy(&message->param, param, sizeof(union parameter));
				message_put(message);
				PDEBUG(DEBUG_JOIN, "message sent.\n");
			}
			relation = relation->next;
		}
	}
}


int track_notify(int oldstate, int notify)
{
	int newstate = oldstate;

	switch(notify) {
		case INFO_NOTIFY_USER_RESUMED:
		case INFO_NOTIFY_REMOTE_RETRIEVAL:
		case INFO_NOTIFY_CONFERENCE_DISCONNECTED:
		case INFO_NOTIFY_RESERVED_CT_1:
		case INFO_NOTIFY_RESERVED_CT_2:
		case INFO_NOTIFY_CALL_IS_DIVERTING:
		newstate = NOTIFY_STATE_ACTIVE;
		break;

		case INFO_NOTIFY_USER_SUSPENDED:
		newstate = NOTIFY_STATE_SUSPEND;
		break;

		case INFO_NOTIFY_REMOTE_HOLD:
		newstate = NOTIFY_STATE_HOLD;
		break;

		case INFO_NOTIFY_CONFERENCE_ESTABLISHED:
		newstate = NOTIFY_STATE_CONFERENCE;
		break;
	}

	return(newstate);
}


/*
 * setup to exactly one endpoint
 * if it fails, the calling endpoint is released.
 * if other outgoing endpoints already exists, they are release as well.
 * note: if this functions fails, it will destroy its own join object!
 */
int JoinPBX::out_setup(unsigned int epoint_id, int message_type, union parameter *param, char *newnumber, char *newkeypad)
{
	struct join_relation *relation;
	struct lcr_msg *message;
	class Endpoint *epoint;

	PDEBUG(DEBUG_JOIN, "no endpoint found, so we will create an endpoint and send the setup message we have.\n");
	/* create a new relation */
	if (!(relation=add_relation()))
		FATAL("No memory for relation.\n");
	relation->type = RELATION_TYPE_SETUP;
	relation->channel_state = 0; /* audio is assumed on a new join */
	relation->tx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	relation->rx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	/* create a new endpoint */
	epoint = new Endpoint(0, j_serial);
	if (!epoint)
		FATAL("No memory for Endpoint instance\n");
	if (!(epoint->ep_app = new DEFAULT_ENDPOINT_APP(epoint, 1))) // outgoing
		FATAL("No memory for Endpoint Application instance\n");
	relation->epoint_id = epoint->ep_serial;
	/* send setup message to new endpoint */
//printf("JOLLY DEBUG: %d\n",join_countrelations(j_serial));
//i			if (options.deb & DEBUG_JOIN)
//				joinpbx_debug(join, "Join::message_epoint");
	message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, message_type);
	memcpy(&message->param, param, sizeof(union parameter));
	if (newnumber)
		SCPY(message->param.setup.dialinginfo.id, newnumber);
	else
		message->param.setup.dialinginfo.id[0] = '\0';
	if (newkeypad)
		SCPY(message->param.setup.dialinginfo.keypad, newkeypad);
	else
		message->param.setup.dialinginfo.keypad[0] = '\0';
	PDEBUG(DEBUG_JOIN, "setup message sent to ep %d with number='%s' keypad='%s'.\n", relation->epoint_id, message->param.setup.dialinginfo.id, message->param.setup.dialinginfo.keypad);
	message_put(message);
	return(0);
}


/* send play message to all members to play join/release jingle */
void JoinPBX::play_jingle(int in)
{
	struct join_relation *relation;
	struct lcr_msg *message;

	relation = j_relation;

	if (!relation)
		return;
	if (!relation->next)
		return;
	while(relation) {
		message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_TONE);
		SCPY(message->param.tone.name, (char *)((in)?"joined":"left"));
		message_put(message);
		relation = relation->next;
	}
}