aboutsummaryrefslogtreecommitdiffstats
path: root/tests/alloc/AllocTest.cpp
blob: 19ca71845c5d62113fffb74a9f3a211a12dea2a8 (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
/* AllocTest.cpp
 *
 * Copyright (C) 2013 by Holger Hans Peter Freyther
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include "gprs_rlcmac.h"
#include "gprs_debug.h"
#include "tbf.h"
#include "bts.h"

#include <string.h>
#include <stdio.h>

extern "C" {
#include <osmocom/core/application.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/utils.h>
}

/* globals used by the code */
void *tall_pcu_ctx;
int16_t spoof_mnc = 0, spoof_mcc = 0;

static gprs_rlcmac_tbf *tbf_alloc(struct gprs_rlcmac_bts *bts,
		GprsMs *ms, gprs_rlcmac_tbf_direction dir,
		uint8_t use_trx,
		uint8_t ms_class, uint8_t single_slot)
{
	if (dir == GPRS_RLCMAC_UL_TBF)
		return tbf_alloc_ul_tbf(bts, ms, use_trx, ms_class, single_slot);
	else
		return tbf_alloc_dl_tbf(bts, ms, use_trx, ms_class, single_slot);
}

static void check_tfi_usage(BTS *the_bts)
{
	int pdch_no;
	struct gprs_rlcmac_bts *bts = the_bts->bts_data();

	struct gprs_rlcmac_tbf *tfi_usage[8][8][2][32] = {{{{NULL}}}};
	struct llist_head *tbf_lists[2] = {
		&bts->ul_tbfs,
		&bts->dl_tbfs
	};

	gprs_rlcmac_tbf *tbf;
	struct llist_pods *lpods;
	unsigned list_idx;
	struct gprs_rlcmac_tbf **tbf_var;

	for (list_idx = 0; list_idx < ARRAY_SIZE(tbf_lists); list_idx += 1)
	{

		llist_pods_for_each_entry(tbf, tbf_lists[list_idx], list, lpods) {
			for (pdch_no = 0; pdch_no < 8; pdch_no += 1) {
				struct gprs_rlcmac_pdch *pdch = tbf->pdch[pdch_no];
				if (pdch == NULL)
					continue;

				tbf_var = &tfi_usage
					[tbf->trx->trx_no]
					[pdch_no]
					[tbf->direction]
					[tbf->tfi()];

				OSMO_ASSERT(*tbf_var == NULL);
				if (tbf->direction == GPRS_RLCMAC_DL_TBF) {
					OSMO_ASSERT(pdch->dl_tbf_by_tfi(
							tbf->tfi()) == tbf);
					OSMO_ASSERT(the_bts->dl_tbf_by_tfi(
							tbf->tfi(),
							tbf->trx->trx_no,
							pdch_no) == tbf);
				} else {
					OSMO_ASSERT(pdch->ul_tbf_by_tfi(
							tbf->tfi()) == tbf);
					OSMO_ASSERT(the_bts->ul_tbf_by_tfi(
							tbf->tfi(),
							tbf->trx->trx_no,
							pdch_no) == tbf);
				}
				*tbf_var = tbf;
				OSMO_ASSERT(pdch->assigned_tfi(tbf->direction) &
					(1 << tbf->tfi()));
			}
		}
	}
}

static void test_alloc_a(gprs_rlcmac_tbf_direction dir,
	uint8_t slots, const int count)
{
	int tfi;
	int i;
	uint8_t used_trx, tmp_trx;
	BTS the_bts;
	struct gprs_rlcmac_bts *bts;
	struct gprs_rlcmac_tbf *tbfs[32*8+1] = { 0, };

	printf("Testing alloc_a direction(%d)\n", dir);

	bts = the_bts.bts_data();
	bts->alloc_algorithm = alloc_algorithm_a;

	struct gprs_rlcmac_trx *trx = &bts->trx[0];
	for (i = 0; i < 8; i += 1)
		if (slots & (1 << i))
			trx->pdch[i].enable();

	OSMO_ASSERT(count >= 0 && count <= (int)ARRAY_SIZE(tbfs));

	/**
	 * Currently alloc_a will only allocate from the first
	 * PDCH and all possible usf's. We run out of usf's before
	 * we are out of tfi's. Observe this and make sure that at
	 * least this part is working okay.
	 */
	for (i = 0; i < (int)ARRAY_SIZE(tbfs); ++i) {
		tbfs[i] = tbf_alloc(bts, NULL, dir, -1, 0, 0);
		if (tbfs[i] == NULL)
			break;

		used_trx = tbfs[i]->trx->trx_no;
		tfi = the_bts.tfi_find_free(dir, &tmp_trx, used_trx);
		OSMO_ASSERT(tbfs[i]->tfi() != tfi);
	}

	check_tfi_usage(&the_bts);

	OSMO_ASSERT(i == count);

	for (i = 0; i < count; ++i)
		if (tbfs[i])
			tbf_free(tbfs[i]);

	tbfs[tfi] = tbf_alloc(bts, NULL, dir, -1, 0, 0);
	OSMO_ASSERT(tbfs[tfi]);
	tbf_free(tbfs[tfi]);
}

static void test_alloc_a()
{
	/* slots 2 - 3 */
	test_alloc_a(GPRS_RLCMAC_DL_TBF, 0x0c, 32*2);
	test_alloc_a(GPRS_RLCMAC_UL_TBF, 0x0c, 14);

	/* slots 1 - 5 */
	test_alloc_a(GPRS_RLCMAC_DL_TBF, 0x1e, 32*4);
	test_alloc_a(GPRS_RLCMAC_UL_TBF, 0x1e, 28);
}

static void dump_assignment(struct gprs_rlcmac_tbf *tbf, const char *dir)
{
	for (size_t i = 0; i < ARRAY_SIZE(tbf->pdch); ++i)
		if (tbf->pdch[i])
			printf("PDCH[%d] is used for %s\n", i, dir);
	printf("PDCH[%d] is control_ts for %s\n", tbf->control_ts, dir);
	printf("PDCH[%d] is first common for %s\n", tbf->first_common_ts, dir);
}

static void test_alloc_b(int ms_class)
{
	printf("Going to test multislot assignment MS_CLASS=%d\n", ms_class);
	/*
	 * PDCH is on TS 6,7,8 and we start with a UL allocation and
	 * then follow two DL allocations (once single, once normal).
	 *
	 * Uplink assigned and still available..
	 */
	{
		BTS the_bts;
		struct gprs_rlcmac_bts *bts;
		struct gprs_rlcmac_trx *trx;
		uint8_t trx_no;

		gprs_rlcmac_tbf *ul_tbf, *dl_tbf;

		printf("Testing UL then DL assignment.\n");

		bts = the_bts.bts_data();
		bts->alloc_algorithm = alloc_algorithm_b;

		trx = &bts->trx[0];
		trx->pdch[5].enable();
		trx->pdch[6].enable();
		trx->pdch[7].enable();

		ul_tbf = tbf_alloc_ul_tbf(bts, NULL, -1, ms_class, 1);
		OSMO_ASSERT(ul_tbf);
		OSMO_ASSERT(ul_tbf->ms());
		OSMO_ASSERT(ul_tbf->ms()->current_trx());
		trx_no = ul_tbf->ms()->current_trx()->trx_no;
		dump_assignment(ul_tbf, "UL");

		/* assume final ack has not been sent */
		dl_tbf = tbf_alloc_dl_tbf(bts, ul_tbf->ms(), trx_no, ms_class, 0);
		OSMO_ASSERT(dl_tbf);
		dump_assignment(dl_tbf, "DL");

		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		check_tfi_usage(&the_bts);

		tbf_free(dl_tbf);
		tbf_free(ul_tbf);
	}

	/**
	 * Test with the other order.. first DL and then UL
	 */
	{
		BTS the_bts;
		struct gprs_rlcmac_bts *bts;
		struct gprs_rlcmac_trx *trx;
		uint8_t trx_no;

		gprs_rlcmac_ul_tbf *ul_tbf;
		gprs_rlcmac_dl_tbf *dl_tbf;

		printf("Testing DL then UL assignment followed by update\n");

		bts = the_bts.bts_data();
		bts->alloc_algorithm = alloc_algorithm_b;

		trx = &bts->trx[0];
		trx->pdch[5].enable();
		trx->pdch[6].enable();
		trx->pdch[7].enable();

		dl_tbf = tbf_alloc_dl_tbf(bts, NULL, -1, ms_class, 1);
		dl_tbf->update_ms(0x23, GPRS_RLCMAC_DL_TBF);
		OSMO_ASSERT(dl_tbf);
		OSMO_ASSERT(dl_tbf->ms());
		OSMO_ASSERT(dl_tbf->ms()->current_trx());
		trx_no = dl_tbf->ms()->current_trx()->trx_no;
		dump_assignment(dl_tbf, "DL");

		ul_tbf = tbf_alloc_ul_tbf(bts, dl_tbf->ms(), trx_no, ms_class, 0);
		ul_tbf->update_ms(0x23, GPRS_RLCMAC_UL_TBF);
		ul_tbf->m_contention_resolution_done = 1;
		OSMO_ASSERT(ul_tbf);
		dump_assignment(ul_tbf, "UL");

		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		/* now update the dl_tbf */
		dl_tbf->update();
		dump_assignment(dl_tbf, "DL");
		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		check_tfi_usage(&the_bts);

		tbf_free(dl_tbf);
		tbf_free(ul_tbf);
	}

	/* Andreas osmocom-pcu example */
	{
		BTS the_bts;
		struct gprs_rlcmac_bts *bts;
		struct gprs_rlcmac_trx *trx;
		int tfi;
		uint8_t trx_no;

		gprs_rlcmac_tbf *ul_tbf, *dl_tbf;

		printf("Testing jolly example\n");

		bts = the_bts.bts_data();
		bts->alloc_algorithm = alloc_algorithm_b;

		trx = &bts->trx[0];
		trx->pdch[1].enable();
		trx->pdch[2].enable();
		trx->pdch[3].enable();
		trx->pdch[4].enable();

		tfi = the_bts.tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx_no, -1);
		OSMO_ASSERT(tfi >= 0);
		ul_tbf = tbf_alloc_ul_tbf(bts, NULL, .1, ms_class, 0);
		OSMO_ASSERT(ul_tbf);
		OSMO_ASSERT(ul_tbf->ms());
		OSMO_ASSERT(ul_tbf->ms()->current_trx());
		trx_no = ul_tbf->ms()->current_trx()->trx_no;
		dump_assignment(ul_tbf, "UL");

		/* assume final ack has not been sent */
		dl_tbf = tbf_alloc_dl_tbf(bts, ul_tbf->ms(), trx_no, ms_class, 0);
		OSMO_ASSERT(dl_tbf);
		dump_assignment(dl_tbf, "DL");

		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		check_tfi_usage(&the_bts);

		tbf_free(dl_tbf);
		tbf_free(ul_tbf);
	}
}

#define ENABLE_PDCH(ts_no, enable_flag, trx)	\
		if (enable_flag)		\
			trx->pdch[ts_no].enable();

static void test_alloc_b(bool ts0, bool ts1, bool ts2, bool ts3, bool ts4, bool ts5, bool ts6, bool ts7, int ms_class)
{
	/* we can test the allocation failures differently */
	if (!ts0 && !ts1 && !ts2 && !ts3 && !ts4 && !ts5 && !ts6 && !ts7)
		return;

	printf("Mass test: TS0(%c%c%c%c%c%c%c%c)TS7 MS_Class=%d\n",
		ts0 ? 'O' : 'x',
		ts1 ? 'O' : 'x',
		ts2 ? 'O' : 'x',
		ts3 ? 'O' : 'x',
		ts4 ? 'O' : 'x',
		ts5 ? 'O' : 'x',
		ts6 ? 'O' : 'x',
		ts7 ? 'O' : 'x', ms_class);
	fflush(stdout);

	{
		BTS the_bts;
		struct gprs_rlcmac_bts *bts;
		struct gprs_rlcmac_trx *trx;
		uint8_t trx_no;

		gprs_rlcmac_tbf *ul_tbf, *dl_tbf;

		bts = the_bts.bts_data();
		bts->alloc_algorithm = alloc_algorithm_b;

		trx = &bts->trx[0];
		ENABLE_PDCH(0, ts0, trx);
		ENABLE_PDCH(1, ts1, trx);
		ENABLE_PDCH(2, ts2, trx);
		ENABLE_PDCH(3, ts3, trx);
		ENABLE_PDCH(4, ts4, trx);
		ENABLE_PDCH(5, ts5, trx);
		ENABLE_PDCH(6, ts6, trx);
		ENABLE_PDCH(7, ts7, trx);

		ul_tbf = tbf_alloc_ul_tbf(bts, NULL, -1, ms_class, 1);
		OSMO_ASSERT(ul_tbf->ms());
		OSMO_ASSERT(ul_tbf->ms()->current_trx());
		trx_no = ul_tbf->ms()->current_trx()->trx_no;
		OSMO_ASSERT(ul_tbf);

		/* assume final ack has not been sent */
		dl_tbf = tbf_alloc_dl_tbf(bts, ul_tbf->ms(), trx_no, ms_class, 0);
		OSMO_ASSERT(dl_tbf);

		/* verify that both are on the same ts */
		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		check_tfi_usage(&the_bts);

		tbf_free(dl_tbf);
		tbf_free(ul_tbf);
	}

	/**
	 * Test with the other order.. first DL and then UL
	 */
	{
		BTS the_bts;
		struct gprs_rlcmac_bts *bts;
		struct gprs_rlcmac_trx *trx;
		uint8_t trx_no;

		gprs_rlcmac_ul_tbf *ul_tbf;
		gprs_rlcmac_dl_tbf *dl_tbf;

		bts = the_bts.bts_data();
		bts->alloc_algorithm = alloc_algorithm_b;

		trx = &bts->trx[0];
		ENABLE_PDCH(0, ts0, trx);
		ENABLE_PDCH(1, ts1, trx);
		ENABLE_PDCH(2, ts2, trx);
		ENABLE_PDCH(3, ts3, trx);
		ENABLE_PDCH(4, ts4, trx);
		ENABLE_PDCH(5, ts5, trx);
		ENABLE_PDCH(6, ts6, trx);
		ENABLE_PDCH(7, ts7, trx);

		dl_tbf = tbf_alloc_dl_tbf(bts, NULL, -1, ms_class, 1);
		OSMO_ASSERT(dl_tbf);
		OSMO_ASSERT(dl_tbf->ms());
		OSMO_ASSERT(dl_tbf->ms()->current_trx());
		trx_no = dl_tbf->ms()->current_trx()->trx_no;
		dl_tbf->update_ms(0x23, GPRS_RLCMAC_DL_TBF);

		ul_tbf = tbf_alloc_ul_tbf(bts, dl_tbf->ms(), trx_no, ms_class, 0);
		OSMO_ASSERT(ul_tbf);
		ul_tbf->update_ms(0x23, GPRS_RLCMAC_UL_TBF);
		ul_tbf->m_contention_resolution_done = 1;

		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		/* now update the dl_tbf */
		dl_tbf->update();
		OSMO_ASSERT(dl_tbf->first_common_ts == ul_tbf->first_common_ts);

		OSMO_ASSERT(ul_tbf->ms_class() == ms_class);
		OSMO_ASSERT(dl_tbf->ms_class() == ms_class);

		check_tfi_usage(&the_bts);

		tbf_free(dl_tbf);
		tbf_free(ul_tbf);
	}
}

static void test_all_alloc_b()
{
	/* it is a bit crazy... */
 for (uint8_t ts0 = 0; ts0 < 2; ++ts0)
  for (uint8_t ts1 = 0; ts1 < 2; ++ts1)
    for (uint8_t ts2 = 0; ts2 < 2; ++ts2)
     for (uint8_t ts3 = 0; ts3 < 2; ++ts3)
      for (uint8_t ts4 = 0; ts4 < 2; ++ts4)
       for (uint8_t ts5 = 0; ts5 < 2; ++ts5)
        for (uint8_t ts6 = 0; ts6 < 2; ++ts6)
         for (uint8_t ts7 = 0; ts7 < 2; ++ts7)
	  for (int ms_class = 0; ms_class < 30; ++ms_class)
		test_alloc_b(ts0, ts1, ts2, ts3, ts4, ts5, ts6, ts7, ms_class);
}

static void test_alloc_b()
{
	for (int i = 0; i < 30; ++i)
		test_alloc_b(i);

	test_all_alloc_b();
}

typedef int (*algo_t)(struct gprs_rlcmac_bts *bts,
		struct GprsMs *ms,
		struct gprs_rlcmac_tbf *tbf, uint32_t cust, uint8_t single,
		int use_trx);

static char get_dir_char(uint8_t mask, uint8_t tx, uint8_t rx)
{
	return (mask & tx & rx) ? 'C' :
		(mask & tx)     ? 'U' :
		(mask & rx)     ? 'D' :
				  '.';
}

enum test_mode {
	TEST_MODE_UL_ONLY,
	TEST_MODE_DL_ONLY,
	TEST_MODE_UL_AND_DL,
	TEST_MODE_DL_AND_UL,
	TEST_MODE_DL_AFTER_UL,
	TEST_MODE_UL_AFTER_DL,
};

static GprsMs *alloc_tbfs(BTS *the_bts, GprsMs *ms, unsigned ms_class,
	enum test_mode mode)
{
	struct gprs_rlcmac_bts *bts;
	uint8_t trx_no = -1;

	bts = the_bts->bts_data();

	gprs_rlcmac_tbf *tbf = NULL;

	if (ms && ms->current_trx())
		trx_no = ms->current_trx()->trx_no;

	GprsMs::Guard guard1(ms);

	/* Allocate what is needed first */
	switch (mode) {
	case TEST_MODE_UL_ONLY:
	case TEST_MODE_DL_AFTER_UL:
	case TEST_MODE_UL_AND_DL:
		if (ms && ms->ul_tbf())
			tbf_free(ms->ul_tbf());
		tbf = tbf_alloc_ul_tbf(bts, ms, trx_no, ms_class, 0);
		if (tbf == NULL)
			return NULL;
		break;
	case TEST_MODE_DL_ONLY:
	case TEST_MODE_UL_AFTER_DL:
	case TEST_MODE_DL_AND_UL:
		if (ms && ms->dl_tbf())
			tbf_free(ms->dl_tbf());
		tbf = tbf_alloc_dl_tbf(bts, ms, trx_no, ms_class, 0);
		if (tbf == NULL)
			return NULL;
	}

	OSMO_ASSERT(tbf);
	OSMO_ASSERT(tbf->ms());
	OSMO_ASSERT(ms == NULL || ms == tbf->ms());
	ms = tbf->ms();

	GprsMs::Guard guard2(ms);

	/* Continue with what is needed next */
	switch (mode) {
	case TEST_MODE_UL_ONLY:
	case TEST_MODE_DL_ONLY:
		/* We are done */
		break;

	case TEST_MODE_DL_AFTER_UL:
	case TEST_MODE_UL_AND_DL:
		ms = alloc_tbfs(the_bts, ms, ms_class, TEST_MODE_DL_ONLY);
		break;

	case TEST_MODE_UL_AFTER_DL:
	case TEST_MODE_DL_AND_UL:
		ms = alloc_tbfs(the_bts, ms, ms_class, TEST_MODE_UL_ONLY);
		break;
	}

	/* Optionally delete the TBF */
	switch (mode) {
	case TEST_MODE_DL_AFTER_UL:
	case TEST_MODE_UL_AFTER_DL:
		tbf_free(tbf);
		break;

	default:
		break;
	}

	return  guard2.is_idle() ? NULL : ms;
}

static unsigned alloc_many_tbfs(BTS *the_bts, unsigned min_class,
	unsigned max_class, enum test_mode mode)
{
	unsigned counter;
	unsigned ms_class = min_class;

	for (counter = 0; 1; counter += 1) {
		gprs_rlcmac_tbf *ul_tbf, *dl_tbf;
		uint8_t ul_slots = 0;
		uint8_t dl_slots = 0;
		unsigned i;
		int tfi = -1;
		int tfi2;
		uint8_t trx2;
		GprsMs *ms;
		enum gprs_rlcmac_tbf_direction dir;
		uint32_t tlli = counter + 0xc0000000;

		ms = the_bts->ms_by_tlli(tlli);

		ms = alloc_tbfs(the_bts, ms, ms_class, mode);
		if (!ms)
			break;

		ms->set_tlli(tlli);

		ul_tbf = ms->ul_tbf();
		dl_tbf = ms->dl_tbf();

		if (ul_tbf) {
			ul_slots = 1 << ul_tbf->first_common_ts;
			tfi = ul_tbf->tfi();
			dir = GPRS_RLCMAC_UL_TBF;
		} else if (dl_tbf) {
			ul_slots = 1 << dl_tbf->first_common_ts;
			tfi = dl_tbf->tfi();
			dir = GPRS_RLCMAC_DL_TBF;
		}

		for (i = 0; dl_tbf && i < ARRAY_SIZE(dl_tbf->pdch); i += 1)
			if (dl_tbf->pdch[i])
				dl_slots |= 1 << i;

		printf(" TBF[%d] class %d reserves %c%c%c%c%c%c%c%c\n",
			tfi, ms_class,
			get_dir_char(0x01, ul_slots, dl_slots),
			get_dir_char(0x02, ul_slots, dl_slots),
			get_dir_char(0x04, ul_slots, dl_slots),
			get_dir_char(0x08, ul_slots, dl_slots),
			get_dir_char(0x10, ul_slots, dl_slots),
			get_dir_char(0x20, ul_slots, dl_slots),
			get_dir_char(0x40, ul_slots, dl_slots),
			get_dir_char(0x80, ul_slots, dl_slots));

		if (tfi >= 0) {
			OSMO_ASSERT(ms->current_trx());
			tfi2 = the_bts->tfi_find_free(dir, &trx2,
				ms->current_trx()->trx_no);
			OSMO_ASSERT(tfi != tfi2);
			OSMO_ASSERT(trx2 == ms->current_trx()->trx_no);
		}

		ms_class += 1;
		if (ms_class > max_class)
			ms_class = min_class;
	}

	return counter;
}

static void test_successive_allocation(algo_t algo, unsigned min_class,
	unsigned max_class, enum test_mode mode,
	unsigned expect_num, const char *text)
{
	BTS the_bts;
	struct gprs_rlcmac_bts *bts;
	struct gprs_rlcmac_trx *trx;
	unsigned counter;

	printf("Going to test assignment with many TBF, %s\n", text);

	bts = the_bts.bts_data();
	bts->alloc_algorithm = algo;

	trx = &bts->trx[0];
	trx->pdch[3].enable();
	trx->pdch[4].enable();
	trx->pdch[5].enable();
	trx->pdch[6].enable();
	trx->pdch[7].enable();

	counter = alloc_many_tbfs(&the_bts, min_class, max_class, mode);

	printf("  Successfully allocated %d UL TBFs\n", counter);
	OSMO_ASSERT(counter == expect_num);

	check_tfi_usage(&the_bts);
}

static void test_many_connections(algo_t algo, unsigned expect_num,
	const char *text)
{
	BTS the_bts;
	struct gprs_rlcmac_bts *bts;
	struct gprs_rlcmac_trx *trx;
	int counter1, counter2 = -1;
	unsigned i;
	enum test_mode mode_seq[] = {
		TEST_MODE_DL_AFTER_UL,
		TEST_MODE_UL_ONLY,
		TEST_MODE_DL_AFTER_UL,
		TEST_MODE_DL_ONLY,
	};

	printf("Going to test assignment with many connections, %s\n", text);

	bts = the_bts.bts_data();
	bts->alloc_algorithm = algo;

	trx = &bts->trx[0];
	trx->pdch[3].enable();
	trx->pdch[4].enable();
	trx->pdch[5].enable();
	trx->pdch[6].enable();
	trx->pdch[7].enable();

	for (i = 0; i < ARRAY_SIZE(mode_seq); i += 1) {
		counter1 = alloc_many_tbfs(&the_bts, 1, 29, mode_seq[i]);
		fprintf(stderr, "  Allocated %d TBFs (previously %d)\n",
			counter1, counter2);

		check_tfi_usage(&the_bts);

		/* This will stop earlier due to USF shortage */
		if (mode_seq[i] == TEST_MODE_UL_ONLY)
			continue;

		if (counter2 >= 0)
			OSMO_ASSERT(counter1 >= counter2);

		counter2 = counter1;
	}

	printf("  Successfully allocated %d TBFs\n", counter1);

	OSMO_ASSERT(expect_num == (unsigned)counter1);
}

static void test_successive_allocation()
{
	test_successive_allocation(alloc_algorithm_a, 1, 1, TEST_MODE_UL_AND_DL,
		35, "algorithm A (UL and DL)");
	test_successive_allocation(alloc_algorithm_b, 10, 10, TEST_MODE_UL_AND_DL,
		32, "algorithm B class 10 (UL and DL)");
	test_successive_allocation(alloc_algorithm_b, 12, 12, TEST_MODE_UL_AND_DL,
		32, "algorithm B class 12 (UL and DL)");
	test_successive_allocation(alloc_algorithm_b, 1, 12, TEST_MODE_UL_AND_DL,
		32, "algorithm B class 1-12 (UL and DL)");
	test_successive_allocation(alloc_algorithm_b, 1, 29, TEST_MODE_UL_AND_DL,
		32, "algorithm B class 1-29 (UL and DL)");

	test_successive_allocation(alloc_algorithm_a, 1, 1, TEST_MODE_DL_AND_UL,
		35, "algorithm A (DL and UL)");
	test_successive_allocation(alloc_algorithm_b, 10, 10, TEST_MODE_DL_AND_UL,
		32, "algorithm B class 10 (DL and UL)");

	test_successive_allocation(alloc_algorithm_a, 1, 1, TEST_MODE_DL_AFTER_UL,
		160, "algorithm A (DL after UL)");
	test_successive_allocation(alloc_algorithm_b, 10, 10, TEST_MODE_DL_AFTER_UL,
		32, "algorithm B class 10 (DL after UL)");

	test_successive_allocation(alloc_algorithm_a, 1, 1, TEST_MODE_UL_AFTER_DL,
		35, "algorithm A (UL after DL)");
	test_successive_allocation(alloc_algorithm_b, 10, 10, TEST_MODE_UL_AFTER_DL,
		32, "algorithm B class 10 (UL after DL)");

	test_successive_allocation(alloc_algorithm_a, 1, 1, TEST_MODE_UL_ONLY,
		35, "algorithm A (UL only)");
	test_successive_allocation(alloc_algorithm_b, 10, 10, TEST_MODE_UL_ONLY,
		32, "algorithm B class 10 (UL only)");

	test_successive_allocation(alloc_algorithm_a, 1, 1, TEST_MODE_DL_ONLY,
		160, "algorithm A (DL ONLY)");
	test_successive_allocation(alloc_algorithm_b, 10, 10, TEST_MODE_DL_ONLY,
		32, "algorithm B class 10 (DL ONLY)");
}

static void test_many_connections()
{
	test_many_connections(alloc_algorithm_a, 160, "algorithm A");
	test_many_connections(alloc_algorithm_b, 32, "algorithm B");
}

int main(int argc, char **argv)
{
	tall_pcu_ctx = talloc_named_const(NULL, 1, "moiji-mobile AllocTest context");
	if (!tall_pcu_ctx)
		abort();

	msgb_set_talloc_ctx(tall_pcu_ctx);
	osmo_init_logging(&gprs_log_info);
	log_set_use_color(osmo_stderr_target, 0);
	log_set_print_filename(osmo_stderr_target, 0);
	if (getenv("LOGL_DEBUG"))
		log_set_log_level(osmo_stderr_target, LOGL_DEBUG);

	test_alloc_a();
	test_alloc_b();
	test_successive_allocation();
	test_many_connections();
	return EXIT_SUCCESS;
}

/*
 * stubs that should not be reached
 */
extern "C" {
void l1if_pdch_req() { abort(); }
void l1if_connect_pdch() { abort(); }
void l1if_close_pdch() { abort(); }
void l1if_open_pdch() { abort(); }
}