aboutsummaryrefslogtreecommitdiffstats
path: root/src/osmo-bsc/gsm_data.c
blob: fbc2ae213d947b37e7c2d176b08d28d63e89094a (plain)
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
/* (C) 2008-2018 by Harald Welte <laforge@gnumonks.org>
 *
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <stdbool.h>
#include <inttypes.h>
#include <netinet/in.h>
#include <talloc.h>

#include <osmocom/core/linuxlist.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/gsm/abis_nm.h>
#include <osmocom/core/statistics.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/gsm48.h>
#include <osmocom/gsm/gsm0808_utils.h>

#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/osmo_bsc_lcls.h>
#include <osmocom/bsc/abis_rsl.h>
#include <osmocom/bsc/abis_nm.h>
#include <osmocom/bsc/handover_cfg.h>
#include <osmocom/bsc/timeslot_fsm.h>
#include <osmocom/bsc/lchan_fsm.h>
#include <osmocom/bsc/bts.h>

void *tall_bsc_ctx = NULL;

void set_ts_e1link(struct gsm_bts_trx_ts *ts, uint8_t e1_nr,
		   uint8_t e1_ts, uint8_t e1_ts_ss)
{
	ts->e1_link.e1_nr = e1_nr;
	ts->e1_link.e1_ts = e1_ts;
	ts->e1_link.e1_ts_ss = e1_ts_ss;
}

/* Search for a BTS in the given Location Area; optionally start searching
 * with start_bts (for continuing to search after the first result) */
struct gsm_bts *gsm_bts_by_lac(struct gsm_network *net, unsigned int lac,
				struct gsm_bts *start_bts)
{
	int i;
	struct gsm_bts *bts;
	int skip = 0;

	if (start_bts)
		skip = 1;

	for (i = 0; i < net->num_bts; i++) {
		bts = gsm_bts_num(net, i);

		if (skip) {
			if (start_bts == bts)
				skip = 0;
			continue;
		}

		if (lac == GSM_LAC_RESERVED_ALL_BTS || bts->location_area_code == lac)
			return bts;
	}
	return NULL;
}

static const struct value_string bts_gprs_mode_names[] = {
	{ BTS_GPRS_NONE,	"none" },
	{ BTS_GPRS_GPRS,	"gprs" },
	{ BTS_GPRS_EGPRS,	"egprs" },
	{ 0,			NULL }
};

enum bts_gprs_mode bts_gprs_mode_parse(const char *arg, int *valid)
{
	int rc;

	rc = get_string_value(bts_gprs_mode_names, arg);
	if (valid)
		*valid = rc != -EINVAL;
	return rc;
}

const char *bts_gprs_mode_name(enum bts_gprs_mode mode)
{
	return get_value_string(bts_gprs_mode_names, mode);
}

struct gsm_bts *gsm_bts_alloc_register(struct gsm_network *net, enum gsm_bts_type type,
					uint8_t bsic)
{
	struct gsm_bts_model *model = bts_model_find(type);
	struct gsm_bts *bts;

	if (!model && type != GSM_BTS_TYPE_UNKNOWN)
		return NULL;

	bts = gsm_bts_alloc(net, net->num_bts);
	if (!bts)
		return NULL;

	net->num_bts++;

	bts->type = type;
	bts->model = model;
	bts->bsic = bsic;

	llist_add_tail(&bts->list, &net->bts_list);

	return bts;
}

void gprs_ra_id_by_bts(struct gprs_ra_id *raid, struct gsm_bts *bts)
{
	*raid = (struct gprs_ra_id){
		.mcc = bts->network->plmn.mcc,
		.mnc = bts->network->plmn.mnc,
		.mnc_3_digits = bts->network->plmn.mnc_3_digits,
		.lac = bts->location_area_code,
		.rac = bts->gprs.rac,
	};
}

void gsm48_ra_id_by_bts(struct gsm48_ra_id *buf, struct gsm_bts *bts)
{
	struct gprs_ra_id raid;

	gprs_ra_id_by_bts(&raid, bts);
	gsm48_encode_ra(buf, &raid);
}

void gsm_abis_mo_reset(struct gsm_abis_mo *mo)
{
	mo->nm_state.operational = NM_OPSTATE_NULL;
	mo->nm_state.availability = NM_AVSTATE_POWER_OFF;
}

void gsm_mo_init(struct gsm_abis_mo *mo, struct gsm_bts *bts,
		 uint8_t obj_class, uint8_t p1, uint8_t p2, uint8_t p3)
{
	mo->bts = bts;
	mo->obj_class = obj_class;
	mo->obj_inst.bts_nr = p1;
	mo->obj_inst.trx_nr = p2;
	mo->obj_inst.ts_nr = p3;
	gsm_abis_mo_reset(mo);
}

const struct value_string gsm_chreq_descs[] = {
	{ GSM_CHREQ_REASON_EMERG,	"emergency call" },
	{ GSM_CHREQ_REASON_PAG,		"answer to paging" },
	{ GSM_CHREQ_REASON_CALL,	"call re-establishment" },
	{ GSM_CHREQ_REASON_LOCATION_UPD,"Location updating" },
	{ GSM_CHREQ_REASON_PDCH,	"one phase packet access" },
	{ GSM_CHREQ_REASON_OTHER,	"other" },
	{ 0,				NULL }
};

const struct value_string gsm_pchant_names[] = {
	{ GSM_PCHAN_NONE,	"NONE" },
	{ GSM_PCHAN_CCCH,	"CCCH" },
	{ GSM_PCHAN_CCCH_SDCCH4,"CCCH+SDCCH4" },
	{ GSM_PCHAN_TCH_F,	"TCH/F" },
	{ GSM_PCHAN_TCH_H,	"TCH/H" },
	{ GSM_PCHAN_SDCCH8_SACCH8C, "SDCCH8" },
	{ GSM_PCHAN_PDCH,	"PDCH" },
	{ GSM_PCHAN_TCH_F_PDCH,	"TCH/F_PDCH" },
	{ GSM_PCHAN_UNKNOWN,	"UNKNOWN" },
	{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "CCCH+SDCCH4+CBCH" },
	{ GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "SDCCH8+CBCH" },
	{ GSM_PCHAN_TCH_F_TCH_H_PDCH, "TCH/F_TCH/H_PDCH" },
	{ 0,			NULL }
};

const struct value_string gsm_pchan_ids[] = {
	{ GSM_PCHAN_NONE,	"NONE" },
	{ GSM_PCHAN_CCCH,	"CCCH" },
	{ GSM_PCHAN_CCCH_SDCCH4,"CCCH_SDCCH4" },
	{ GSM_PCHAN_TCH_F,	"TCH_F" },
	{ GSM_PCHAN_TCH_H,	"TCH_H" },
	{ GSM_PCHAN_SDCCH8_SACCH8C, "SDCCH8" },
	{ GSM_PCHAN_PDCH,	"PDCH" },
	{ GSM_PCHAN_TCH_F_PDCH,	"TCH_F_PDCH" },
	{ GSM_PCHAN_UNKNOWN,	"UNKNOWN" },
	{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "CCCH_SDCCH4_CBCH" },
	{ GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "SDCCH8_CBCH" },
	{ GSM_PCHAN_TCH_F_TCH_H_PDCH, "TCH_F_TCH_H_PDCH" },
	{ 0,			NULL }
};

const struct value_string gsm_pchant_descs[13] = {
	{ GSM_PCHAN_NONE,	"Physical Channel not configured" },
	{ GSM_PCHAN_CCCH,	"FCCH + SCH + BCCH + CCCH (Comb. IV)" },
	{ GSM_PCHAN_CCCH_SDCCH4,
		"FCCH + SCH + BCCH + CCCH + 4 SDCCH + 2 SACCH (Comb. V)" },
	{ GSM_PCHAN_TCH_F,	"TCH/F + FACCH/F + SACCH (Comb. I)" },
	{ GSM_PCHAN_TCH_H,	"2 TCH/H + 2 FACCH/H + 2 SACCH (Comb. II)" },
	{ GSM_PCHAN_SDCCH8_SACCH8C, "8 SDCCH + 4 SACCH (Comb. VII)" },
	{ GSM_PCHAN_PDCH,	"Packet Data Channel for GPRS/EDGE" },
	{ GSM_PCHAN_TCH_F_PDCH,	"Dynamic TCH/F or GPRS PDCH" },
	{ GSM_PCHAN_UNKNOWN,	"Unknown / Unsupported channel combination" },
	{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "FCCH + SCH + BCCH + CCCH + CBCH + 3 SDCCH + 2 SACCH (Comb. V)" },
	{ GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "7 SDCCH + 4 SACCH + CBCH (Comb. VII)" },
	{ GSM_PCHAN_TCH_F_TCH_H_PDCH, "Dynamic TCH/F or TCH/H or GPRS PDCH" },
	{ 0,			NULL }
};

const char *gsm_pchan_name(enum gsm_phys_chan_config c)
{
	return get_value_string(gsm_pchant_names, c);
}

enum gsm_phys_chan_config gsm_pchan_parse(const char *name)
{
	return get_string_value(gsm_pchant_names, name);
}

/* TODO: move to libosmocore, next to gsm_chan_t_names? */
const char *gsm_lchant_name(enum gsm_chan_t c)
{
	return get_value_string(gsm_chan_t_names, c);
}

static const struct value_string chreq_names[] = {
	{ GSM_CHREQ_REASON_EMERG,	"EMERGENCY" },
	{ GSM_CHREQ_REASON_PAG,		"PAGING" },
	{ GSM_CHREQ_REASON_CALL,	"CALL" },
	{ GSM_CHREQ_REASON_LOCATION_UPD,"LOCATION_UPDATE" },
	{ GSM_CHREQ_REASON_OTHER,	"OTHER" },
	{ 0,				NULL }
};

const char *gsm_chreq_name(enum gsm_chreq_reason_t c)
{
	return get_value_string(chreq_names, c);
}

struct gsm_bts *gsm_bts_num(const struct gsm_network *net, int num)
{
	struct gsm_bts *bts;

	if (num >= net->num_bts)
		return NULL;

	llist_for_each_entry(bts, &net->bts_list, list) {
		if (bts->nr == num)
			return bts;
	}

	return NULL;
}

/* From a list of local BTSes that match the cell_id, return the Nth one, or NULL if there is no such
 * match. */
struct gsm_bts *gsm_bts_by_cell_id(const struct gsm_network *net,
				   const struct gsm0808_cell_id *cell_id,
				   int match_idx)
{
	struct gsm_bts *bts;
	int i = 0;
	llist_for_each_entry(bts, &net->bts_list, list) {
		if (!gsm_bts_matches_cell_id(bts, cell_id))
			continue;
		if (i < match_idx) {
			/* this is only the i'th match, we're looking for a later one... */
			i++;
			continue;
		}
		return bts;
	}
	return NULL;
}

static char ts2str[255];

char *gsm_ts_name(const struct gsm_bts_trx_ts *ts)
{
	snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d)",
		 ts->trx->bts->nr, ts->trx->nr, ts->nr);

	return ts2str;
}

/*! Log timeslot number with full pchan information */
char *gsm_ts_and_pchan_name(const struct gsm_bts_trx_ts *ts)
{
	if (!ts->fi)
		snprintf(ts2str, sizeof(ts2str),
			 "(bts=%d,trx=%d,ts=%d,pchan_from_config=%s, not allocated)",
			 ts->trx->bts->nr, ts->trx->nr, ts->nr,
			 gsm_pchan_name(ts->pchan_from_config));
	else if (ts->fi->state == TS_ST_NOT_INITIALIZED)
		snprintf(ts2str, sizeof(ts2str),
			 "(bts=%d,trx=%d,ts=%d,pchan_from_config=%s,state=%s)",
			 ts->trx->bts->nr, ts->trx->nr, ts->nr,
			 gsm_pchan_name(ts->pchan_from_config),
			 osmo_fsm_inst_state_name(ts->fi));
	else if (ts->pchan_is == ts->pchan_on_init)
		snprintf(ts2str, sizeof(ts2str),
			 "(bts=%d,trx=%d,ts=%d,pchan=%s,state=%s)",
			 ts->trx->bts->nr, ts->trx->nr, ts->nr,
			 gsm_pchan_name(ts->pchan_is),
			 osmo_fsm_inst_state_name(ts->fi));
	else
		snprintf(ts2str, sizeof(ts2str),
			 "(bts=%d,trx=%d,ts=%d,pchan_on_init=%s,pchan=%s,state=%s)",
			 ts->trx->bts->nr, ts->trx->nr, ts->nr,
			 gsm_pchan_name(ts->pchan_on_init),
			 gsm_pchan_name(ts->pchan_is),
			 osmo_fsm_inst_state_name(ts->fi));
	return ts2str;
}

char *gsm_lchan_name_compute(const struct gsm_lchan *lchan)
{
	struct gsm_bts_trx_ts *ts = lchan->ts;

	snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d,ss=%d)",
		 ts->trx->bts->nr, ts->trx->nr, ts->nr, lchan->nr);

	return ts2str;
}

/* obtain the MO structure for a given object instance */
static inline struct gsm_abis_mo *
gsm_objclass2mo(struct gsm_bts *bts, uint8_t obj_class,
	    const struct abis_om_obj_inst *obj_inst)
{
	struct gsm_bts_trx *trx;
	struct gsm_abis_mo *mo = NULL;

	switch (obj_class) {
	case NM_OC_BTS:
		mo = &bts->mo;
		break;
	case NM_OC_RADIO_CARRIER:
		if (obj_inst->trx_nr >= bts->num_trx) {
			return NULL;
		}
		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
		mo = &trx->mo;
		break;
	case NM_OC_BASEB_TRANSC:
		if (obj_inst->trx_nr >= bts->num_trx) {
			return NULL;
		}
		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
		mo = &trx->bb_transc.mo;
		break;
	case NM_OC_CHANNEL:
		if (obj_inst->trx_nr >= bts->num_trx) {
			return NULL;
		}
		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
		if (obj_inst->ts_nr >= TRX_NR_TS)
			return NULL;
		mo = &trx->ts[obj_inst->ts_nr].mo;
		break;
	case NM_OC_SITE_MANAGER:
		mo = &bts->site_mgr.mo;
		break;
	case NM_OC_BS11:
		switch (obj_inst->bts_nr) {
		case BS11_OBJ_CCLK:
			mo = &bts->bs11.cclk.mo;
			break;
		case BS11_OBJ_BBSIG:
			if (obj_inst->ts_nr > bts->num_trx)
				return NULL;
			trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
			mo = &trx->bs11.bbsig.mo;
			break;
		case BS11_OBJ_PA:
			if (obj_inst->ts_nr > bts->num_trx)
				return NULL;
			trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
			mo = &trx->bs11.pa.mo;
			break;
		default:
			return NULL;
		}
		break;
	case NM_OC_BS11_RACK:
		mo = &bts->bs11.rack.mo;
		break;
	case NM_OC_BS11_ENVABTSE:
		if (obj_inst->trx_nr >= ARRAY_SIZE(bts->bs11.envabtse))
			return NULL;
		mo = &bts->bs11.envabtse[obj_inst->trx_nr].mo;
		break;
	case NM_OC_GPRS_NSE:
		mo = &bts->gprs.nse.mo;
		break;
	case NM_OC_GPRS_CELL:
		mo = &bts->gprs.cell.mo;
		break;
	case NM_OC_GPRS_NSVC:
		if (obj_inst->trx_nr >= ARRAY_SIZE(bts->gprs.nsvc))
			return NULL;
		mo = &bts->gprs.nsvc[obj_inst->trx_nr].mo;
		break;
	}
	return mo;
}

/* obtain the gsm_nm_state data structure for a given object instance */
struct gsm_nm_state *
gsm_objclass2nmstate(struct gsm_bts *bts, uint8_t obj_class,
		 const struct abis_om_obj_inst *obj_inst)
{
	struct gsm_abis_mo *mo;

	mo = gsm_objclass2mo(bts, obj_class, obj_inst);
	if (!mo)
		return NULL;

	return &mo->nm_state;
}

/* obtain the in-memory data structure of a given object instance */
void *
gsm_objclass2obj(struct gsm_bts *bts, uint8_t obj_class,
	     const struct abis_om_obj_inst *obj_inst)
{
	struct gsm_bts_trx *trx;
	void *obj = NULL;

	switch (obj_class) {
	case NM_OC_BTS:
		obj = bts;
		break;
	case NM_OC_RADIO_CARRIER:
		if (obj_inst->trx_nr >= bts->num_trx) {
			return NULL;
		}
		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
		obj = trx;
		break;
	case NM_OC_BASEB_TRANSC:
		if (obj_inst->trx_nr >= bts->num_trx) {
			return NULL;
		}
		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
		obj = &trx->bb_transc;
		break;
	case NM_OC_CHANNEL:
		if (obj_inst->trx_nr >= bts->num_trx) {
			return NULL;
		}
		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
		if (obj_inst->ts_nr >= TRX_NR_TS)
			return NULL;
		obj = &trx->ts[obj_inst->ts_nr];
		break;
	case NM_OC_SITE_MANAGER:
		obj = &bts->site_mgr;
		break;
	case NM_OC_GPRS_NSE:
		obj = &bts->gprs.nse;
		break;
	case NM_OC_GPRS_CELL:
		obj = &bts->gprs.cell;
		break;
	case NM_OC_GPRS_NSVC:
		if (obj_inst->trx_nr >= ARRAY_SIZE(bts->gprs.nsvc))
			return NULL;
		obj = &bts->gprs.nsvc[obj_inst->trx_nr];
		break;
	}
	return obj;
}

/* See Table 10.5.25 of GSM04.08 */
uint8_t gsm_pchan2chan_nr(enum gsm_phys_chan_config pchan,
			  uint8_t ts_nr, uint8_t lchan_nr)
{
	uint8_t cbits, chan_nr;

	switch (pchan) {
	case GSM_PCHAN_TCH_F:
	case GSM_PCHAN_TCH_F_PDCH:
		OSMO_ASSERT(lchan_nr == 0);
		cbits = 0x01;
		break;
	case GSM_PCHAN_PDCH:
		OSMO_ASSERT(lchan_nr == 0);
		cbits = RSL_CHAN_OSMO_PDCH >> 3;
		break;
	case GSM_PCHAN_TCH_H:
		OSMO_ASSERT(lchan_nr < 2);
		cbits = 0x02;
		cbits += lchan_nr;
		break;
	case GSM_PCHAN_CCCH_SDCCH4:
	case GSM_PCHAN_CCCH_SDCCH4_CBCH:
		/*
		 * As a special hack for BCCH, lchan_nr == 4 may be passed
		 * here. This should never be sent in an RSL message.
		 * See osmo-bts-xxx/oml.c:opstart_compl().
		 */
		if (lchan_nr == CCCH_LCHAN)
			chan_nr = 0;
		else
			OSMO_ASSERT(lchan_nr < 4);
		cbits = 0x04;
		cbits += lchan_nr;
		break;
	case GSM_PCHAN_SDCCH8_SACCH8C:
	case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
		OSMO_ASSERT(lchan_nr < 8);
		cbits = 0x08;
		cbits += lchan_nr;
		break;
	default:
	case GSM_PCHAN_CCCH:
		OSMO_ASSERT(lchan_nr == 0);
		cbits = 0x10;
		break;
	}

	chan_nr = (cbits << 3) | (ts_nr & 0x7);

	return chan_nr;
}

uint8_t gsm_lchan2chan_nr(const struct gsm_lchan *lchan)
{
	/* Note: non-standard Osmocom style dyn TS PDCH mode chan_nr is only used within
	 * rsl_tx_dyn_ts_pdch_act_deact(). */
	return gsm_pchan2chan_nr(lchan->ts->pchan_is, lchan->ts->nr, lchan->nr);
}

static const uint8_t subslots_per_pchan[] = {
	[GSM_PCHAN_NONE] = 0,
	[GSM_PCHAN_CCCH] = 0,
	[GSM_PCHAN_PDCH] = 0,
	[GSM_PCHAN_CCCH_SDCCH4] = 4,
	[GSM_PCHAN_TCH_F] = 1,
	[GSM_PCHAN_TCH_H] = 2,
	[GSM_PCHAN_SDCCH8_SACCH8C] = 8,
	[GSM_PCHAN_CCCH_SDCCH4_CBCH] = 4,
	[GSM_PCHAN_SDCCH8_SACCH8C_CBCH] = 8,
	/* Dyn TS: maximum allowed subslots */
	[GSM_PCHAN_TCH_F_TCH_H_PDCH] = 2,
	[GSM_PCHAN_TCH_F_PDCH] = 1,
};

/*! According to ts->pchan and possibly ts->dyn_pchan, return the number of
 * logical channels available in the timeslot. */
uint8_t pchan_subslots(enum gsm_phys_chan_config pchan)
{
	if (pchan < 0 || pchan >= ARRAY_SIZE(subslots_per_pchan))
		return 0;
	return subslots_per_pchan[pchan];
}

static bool pchan_is_tch(enum gsm_phys_chan_config pchan)
{
	switch (pchan) {
	case GSM_PCHAN_TCH_F:
	case GSM_PCHAN_TCH_H:
		return true;
	default:
		return false;
	}
}

bool ts_is_tch(struct gsm_bts_trx_ts *ts)
{
	return pchan_is_tch(ts->pchan_is);
}

struct gsm_bts *conn_get_bts(struct gsm_subscriber_connection *conn) {
	if (!conn || !conn->lchan)
		return NULL;
	return conn->lchan->ts->trx->bts;
}

static void _chan_desc_fill_tail(struct gsm48_chan_desc *cd, const struct gsm_lchan *lchan)
{
	if (!lchan->ts->hopping.enabled) {
		uint16_t arfcn = lchan->ts->trx->arfcn & 0x3ff;
		cd->h0.tsc = gsm_ts_tsc(lchan->ts);
		cd->h0.h = 0;
		cd->h0.spare = 0;
		cd->h0.arfcn_high = arfcn >> 8;
		cd->h0.arfcn_low = arfcn & 0xff;
	} else {
		cd->h1.tsc = gsm_ts_tsc(lchan->ts);
		cd->h1.h = 1;
		cd->h1.maio_high = lchan->ts->hopping.maio >> 2;
		cd->h1.maio_low = lchan->ts->hopping.maio & 0x03;
		cd->h1.hsn = lchan->ts->hopping.hsn;
	}
}

void gsm48_lchan2chan_desc(struct gsm48_chan_desc *cd,
			   const struct gsm_lchan *lchan)
{
	cd->chan_nr = gsm_lchan2chan_nr(lchan);
	_chan_desc_fill_tail(cd, lchan);
}

/* like gsm48_lchan2chan_desc() above, but use ts->pchan_from_config to
 * return a channel description based on what is configured, rather than
 * what the current state of the pchan type is */
void gsm48_lchan2chan_desc_as_configured(struct gsm48_chan_desc *cd,
					 const struct gsm_lchan *lchan)
{
	cd->chan_nr = gsm_pchan2chan_nr(lchan->ts->pchan_from_config, lchan->ts->nr, lchan->nr);
	_chan_desc_fill_tail(cd, lchan);
}

uint8_t gsm_ts_tsc(const struct gsm_bts_trx_ts *ts)
{
	if (ts->tsc != -1)
		return ts->tsc;
	else
		return ts->trx->bts->bsic & 7;
}

bool nm_is_running(const struct gsm_nm_state *s) {
	if (s->operational != NM_OPSTATE_ENABLED)
		return false;
	if ((s->availability != NM_AVSTATE_OK) && (s->availability != 0xff))
		return false;
	if (s->administrative != NM_STATE_UNLOCKED)
		return false;
	return true;
}

/* determine the logical channel type based on the physical channel type */
int gsm_lchan_type_by_pchan(enum gsm_phys_chan_config pchan)
{
	switch (pchan) {
	case GSM_PCHAN_TCH_F:
		return GSM_LCHAN_TCH_F;
	case GSM_PCHAN_TCH_H:
		return GSM_LCHAN_TCH_H;
	case GSM_PCHAN_SDCCH8_SACCH8C:
	case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
	case GSM_PCHAN_CCCH_SDCCH4:
	case GSM_PCHAN_CCCH_SDCCH4_CBCH:
		return GSM_LCHAN_SDCCH;
	default:
		return -1;
	}
}

enum gsm_phys_chan_config gsm_pchan_by_lchan_type(enum gsm_chan_t type)
{
	switch (type) {
	case GSM_LCHAN_TCH_F:
		return GSM_PCHAN_TCH_F;
	case GSM_LCHAN_TCH_H:
		return GSM_PCHAN_TCH_H;
	case GSM_LCHAN_NONE:
	case GSM_LCHAN_PDTCH:
		/* TODO: so far lchan->type is NONE in PDCH mode. PDTCH is only
		 * used in osmo-bts. Maybe set PDTCH and drop the NONE case
		 * here. */
		return GSM_PCHAN_PDCH;
	default:
		return GSM_PCHAN_UNKNOWN;
	}
}

/* Can the timeslot in principle be used as this PCHAN kind? */
bool ts_is_capable_of_pchan(struct gsm_bts_trx_ts *ts, enum gsm_phys_chan_config pchan)
{
	switch (ts->pchan_on_init) {
	case GSM_PCHAN_TCH_F_PDCH:
		switch (pchan) {
		case GSM_PCHAN_TCH_F:
		case GSM_PCHAN_PDCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_TCH_F_TCH_H_PDCH:
		switch (pchan) {
		case GSM_PCHAN_TCH_F:
		case GSM_PCHAN_TCH_H:
		case GSM_PCHAN_PDCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_CCCH_SDCCH4_CBCH:
		switch (pchan) {
		case GSM_PCHAN_CCCH_SDCCH4_CBCH:
		case GSM_PCHAN_CCCH_SDCCH4:
		case GSM_PCHAN_CCCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_CCCH_SDCCH4:
		switch (pchan) {
		case GSM_PCHAN_CCCH_SDCCH4:
		case GSM_PCHAN_CCCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
		switch (pchan) {
		case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
		case GSM_PCHAN_SDCCH8_SACCH8C:
			return true;
		default:
			return false;
		}

	default:
		return ts->pchan_on_init == pchan;
	}
}

bool ts_is_capable_of_lchant(struct gsm_bts_trx_ts *ts, enum gsm_chan_t type)
{
	switch (ts->pchan_on_init) {

	case GSM_PCHAN_TCH_F:
		switch (type) {
		case GSM_LCHAN_TCH_F:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_TCH_H:
		switch (type) {
		case GSM_LCHAN_TCH_H:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_TCH_F_PDCH:
		switch (type) {
		case GSM_LCHAN_TCH_F:
		case GSM_LCHAN_PDTCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_TCH_F_TCH_H_PDCH:
		switch (type) {
		case GSM_LCHAN_TCH_F:
		case GSM_LCHAN_TCH_H:
		case GSM_LCHAN_PDTCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_PDCH:
		switch (type) {
		case GSM_LCHAN_PDTCH:
			return true;
		default:
			return false;
		}

	case GSM_PCHAN_CCCH:
		switch (type) {
		case GSM_LCHAN_CCCH:
			return true;
		default:
			return false;
		}
		break;

	case GSM_PCHAN_CCCH_SDCCH4_CBCH:
	case GSM_PCHAN_CCCH_SDCCH4:
	case GSM_PCHAN_SDCCH8_SACCH8C:
	case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
		switch (type) {
		case GSM_LCHAN_CCCH:
		case GSM_LCHAN_SDCCH:
			return true;
		default:
			return false;
		}

	default:
		return false;
	}
}

bool ts_is_usable(const struct gsm_bts_trx_ts *ts)
{
	if (!trx_is_usable(ts->trx)) {
		LOGP(DRLL, LOGL_DEBUG, "%s not usable\n", gsm_trx_name(ts->trx));
		return false;
	}

	if (!ts->fi)
		return false;

	switch (ts->fi->state) {
	case TS_ST_NOT_INITIALIZED:
	case TS_ST_BORKEN:
		return false;
	default:
		break;
	}

	return true;
}

void conn_update_ms_power_class(struct gsm_subscriber_connection *conn, uint8_t power_class)
{
	struct gsm_bts *bts = conn_get_bts(conn);
	LOGP(DRLL, LOGL_DEBUG, "MS Power class update: %" PRIu8 " -> %" PRIu8 "\n",
	     conn->ms_power_class, power_class);

	conn->ms_power_class = power_class;

	/* If there's an associated lchan, attempt to update its max power to be
	   on track with band maximum values */
	if (bts && conn->lchan)
		lchan_update_ms_power_ctrl_level(conn->lchan, bts->ms_max_power);
}

void lchan_update_ms_power_ctrl_level(struct gsm_lchan *lchan, int ms_power_dbm)
{
	struct gsm_bts *bts = lchan->ts->trx->bts;
	struct gsm_subscriber_connection *conn = lchan->conn;
	int max_pwr_dbm_pwclass, new_pwr;
	bool send_pwr_ctrl_msg = false;

	LOG_LCHAN(lchan, LOGL_DEBUG,
		  "MS Power level update requested: %d dBm\n", ms_power_dbm);

	if (!conn)
		goto ms_power_default;

	if (conn->ms_power_class == 0)
		goto ms_power_default;

	if ((max_pwr_dbm_pwclass = (int)ms_class_gmsk_dbm(bts->band, conn->ms_power_class)) < 0) {
		LOG_LCHAN(lchan, LOGL_INFO,
			 "Failed getting max ms power for power class %" PRIu8
			 " on band %s, providing default max ms power\n",
			 conn->ms_power_class, gsm_band_name(bts->band));
		goto ms_power_default;
	}

	/* Current configured max pwr is above maximum one allowed on
	   current band + ms power class, so use that one. */
	if (ms_power_dbm > max_pwr_dbm_pwclass)
		ms_power_dbm = max_pwr_dbm_pwclass;

ms_power_default:
	if ((new_pwr = ms_pwr_ctl_lvl(bts->band, ms_power_dbm)) < 0) {
		LOG_LCHAN(lchan, LOGL_INFO,
			 "Failed getting max ms power level %d on band %s,"
			 " providing default max ms power\n",
			 ms_power_dbm, gsm_band_name(bts->band));
		return;
	}

	LOG_LCHAN(lchan, LOGL_DEBUG,
		  "MS Power level update (power class %" PRIu8 "): %" PRIu8 " -> %d\n",
		  conn ? conn->ms_power_class : 0, lchan->ms_power, new_pwr);

	/* If chan was already activated and max ms_power changes (due to power
	   classmark received), send an MS Power Control message */
	if (lchan->activate.activ_ack && new_pwr != lchan->ms_power)
		send_pwr_ctrl_msg = true;

	lchan->ms_power = new_pwr;

	if (send_pwr_ctrl_msg)
		rsl_chan_ms_power_ctrl(lchan);
}

const struct value_string lchan_activate_mode_names[] = {
	OSMO_VALUE_STRING(FOR_NONE),
	OSMO_VALUE_STRING(FOR_MS_CHANNEL_REQUEST),
	OSMO_VALUE_STRING(FOR_ASSIGNMENT),
	OSMO_VALUE_STRING(FOR_HANDOVER),
	OSMO_VALUE_STRING(FOR_VTY),
	{}
};

/* This may be specific to RR Channel Release, and the mappings were chosen by pure naive guessing without a proper
 * specification available. */
enum gsm48_rr_cause bsc_gsm48_rr_cause_from_gsm0808_cause(enum gsm0808_cause c)
{
	switch (c) {
	case GSM0808_CAUSE_PREEMPTION:
		return GSM48_RR_CAUSE_PREMPTIVE_REL;
	case GSM0808_CAUSE_RADIO_INTERFACE_MESSAGE_FAILURE:
	case GSM0808_CAUSE_INVALID_MESSAGE_CONTENTS:
	case GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING:
	case GSM0808_CAUSE_INCORRECT_VALUE:
	case GSM0808_CAUSE_UNKNOWN_MESSAGE_TYPE:
	case GSM0808_CAUSE_UNKNOWN_INFORMATION_ELEMENT:
		return GSM48_RR_CAUSE_PROT_ERROR_UNSPC;
	case GSM0808_CAUSE_CALL_CONTROL:
	case GSM0808_CAUSE_HANDOVER_SUCCESSFUL:
	case GSM0808_CAUSE_BETTER_CELL:
	case GSM0808_CAUSE_DIRECTED_RETRY:
	case GSM0808_CAUSE_REDUCE_LOAD_IN_SERVING_CELL:
	case GSM0808_CAUSE_RELOCATION_TRIGGERED:
	case GSM0808_CAUSE_ALT_CHAN_CONFIG_REQUESTED:
		return GSM48_RR_CAUSE_NORMAL;
	default:
		return GSM48_RR_CAUSE_ABNORMAL_UNSPEC;
	}
}

/* Map RSL_ERR_* cause codes to gsm48_rr_cause codes.
 * The mappings were chosen by naive guessing without a proper specification available. */
enum gsm48_rr_cause bsc_gsm48_rr_cause_from_rsl_cause(uint8_t c)
{
	switch (c) {
	case RSL_ERR_NORMAL_UNSPEC:
		return GSM48_RR_CAUSE_NORMAL;
	case RSL_ERR_MAND_IE_ERROR:
		return GSM48_RR_CAUSE_INVALID_MAND_INF;
	case RSL_ERR_OPT_IE_ERROR:
		return GSM48_RR_CAUSE_COND_IE_ERROR;
	case RSL_ERR_INVALID_MESSAGE:
	case RSL_ERR_MSG_DISCR:
	case RSL_ERR_MSG_TYPE:
	case RSL_ERR_MSG_SEQ:
	case RSL_ERR_IE_ERROR:
	case RSL_ERR_IE_NONEXIST:
	case RSL_ERR_IE_LENGTH:
	case RSL_ERR_IE_CONTENT:
	case RSL_ERR_PROTO:
		return GSM48_RR_CAUSE_PROT_ERROR_UNSPC;
	default:
		return GSM48_RR_CAUSE_ABNORMAL_UNSPEC;
	}
}