aboutsummaryrefslogtreecommitdiffstats
path: root/openbsc/tests/vlr/vlr_test.c
blob: 19beb69c4b3fac52412219bdce17f9589961a7fd (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
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <signal.h>

#include <osmocom/gsm/gsm48.h>
#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
#include <osmocom/core/application.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/fsm.h>

#include <openbsc/vlr.h>
#include <openbsc/debug.h>

#define S(x)	(1 << (x))

/*
 * TODO:
 * * test FSM for all testvlr_mode (and more)
 * * test also the time-outs in the vlr code
 * * test for memory leaks
 * * how to get the HLR running? Or test against stub?
 * * test disappearing MS connection
 * * test absence of HLR
 */

void *tall_bsc_ctx;
static struct vlr_instance *g_vlr;

/***********************************************************************
 * Finite State Machine simulating MS and MSC towards VLR
 ***********************************************************************/

static int timer_error_cb(struct osmo_fsm_inst *fi)
{
	LOGPFSM(fi, "timer expired waiting for completion\n");
	osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL);
	return 1;
}

enum testvlr_mode {
	MODE_SUCCESS,
	MODE_SUCCESS_TMSI,
	MODE_AUTH_FAIL,
	MODE_AUTH_RESYNC,
};

struct testvlr_priv {
	enum testvlr_mode mode;
	uint32_t tmsi;
	char imsi[16];
	char imei[16];
	struct osmo_location_area_id old_lai;
	struct osmo_location_area_id new_lai;

	struct vlr_subscr *subscr;

	struct osmo_fsm_inst *lu_fsm;
};

#define fsi_priv(x)	(struct testvlr_priv *)(x)->priv

enum f_state {
	/*! initial state */
	ST_NULL,
	/*! LU was sent by MS */
	ST_LU_SENT,
	/*! waiting for auth re-sync */
	ST_RESYNC_SENT,
	/* Waiting for LU ACK */
	ST_WAIT_LU_ACK,
	ST_DONE,
	ST_FAILED,
};

enum f_event {
	/* events from MS */
	EVT_MS_TX_LU,		/* transmit LU REQ to network */
	EVT_MS_TX_ID_RESP,	/* tranmit ID RSP to network */
	EVT_MS_TX_AUTH_RESP,	/* transmit AUTH RESP to network */
	EVT_MS_TX_AUTH_FAIL,	/* transmit AUTH FAIL to network */
	EVT_MS_CONN_LOST,	/* connection to MS was lost */

	/* events from VLR */
	EVT_VLR_AUTH_REQ,	/* transmit AUTH REQ to MS */
	EVT_VLR_ID_REQ_IMSI,	/* transmit ID REQ(IMSI) to MS */
	EVT_VLR_ID_REQ_IMEI,	/* tramsmit ID REQ(IMEI) to MS */
	EVT_VLR_ID_REQ_IMEISV,	/* trasnmit ID REQ(IMEISV) to MS */
	EVT_VLR_AUTH_REJ,	/* transmit AUTH REJ to MS */
	EVT_VLR_SET_CIPH,	/* transmit SET CIPH to MS */
	EVT_VLR_LU_ACK,		/* transmit LU ACK to MS */
	EVT_VLR_LU_REJ,		/* transmit LU REJ to MS */
};

static struct value_string f_event_names[] = {
	{ EVT_MS_TX_LU,		"MS-TX-LU" },
	{ EVT_MS_TX_ID_RESP,	"MS-TX-ID-RESP" },
	{ EVT_MS_TX_AUTH_RESP,	"MS-TX-AUTH-RESP" },
	{ EVT_MS_TX_AUTH_FAIL,	"MS-TX-AUTH-FAIL" },
	{ EVT_MS_CONN_LOST,	"MS-CONN-LOST" },

	{ EVT_VLR_AUTH_REQ,	"VLR-AUTH-REQ" },
	{ EVT_VLR_ID_REQ_IMSI,	"VLR-ID-REQ-IMSI" },
	{ EVT_VLR_ID_REQ_IMEI,	"VLR-ID-REQ-IMEI" },
	{ EVT_VLR_ID_REQ_IMEISV,"VLR-ID-REQ-IMEISV" },
	{ EVT_VLR_AUTH_REJ,	"VLR-AUTH-REJ" },
	{ EVT_VLR_SET_CIPH,	"VLR-SET-CIPH" },
	{ EVT_VLR_LU_ACK,	"VLR-LU-ACK" },
	{ EVT_VLR_LU_REJ,	"VLR-LU-REJ" },
	{ 0, NULL }
};

static void fsm_f_allstate(struct osmo_fsm_inst *fi, uint32_t event,
			   void *data)
{
	struct testvlr_priv *priv = fsi_priv(fi);
	uint8_t mi[16];
	unsigned int mi_len;

	switch (event) {
	case EVT_VLR_ID_REQ_IMSI:
		if (priv->mode != MODE_SUCCESS_TMSI) {
			LOGP(DGPRS, LOGL_NOTICE, "Unexpected ID REQ "
			     "(IMSI)\n");
		}
		mi_len = gsm48_generate_mid_from_imsi(mi, priv->imsi);
		vlr_subscr_rx_id_resp(priv->subscr, mi+2, mi_len-2);
		break;
	case EVT_VLR_ID_REQ_IMEI:
		mi_len = gsm48_generate_mid_from_imsi(mi, priv->imei);
		mi[0] = (mi[0] & 0xf8) | GSM_MI_TYPE_IMEI;
		vlr_subscr_rx_id_resp(priv->subscr+2, mi, mi_len-2);
		break;
	case EVT_VLR_ID_REQ_IMEISV:
		mi_len = gsm48_generate_mid_from_imsi(mi, priv->imei);
		mi[0] = (mi[0] & 0xf8) | GSM_MI_TYPE_IMEISV;
		vlr_subscr_rx_id_resp(priv->subscr, mi+2, mi_len-2);
		break;
	case EVT_MS_CONN_LOST:
		vlr_subscr_disconnected(priv->subscr);
		/* IDEA: not release but keep around in extra state to
		 * see if VLR still sends us anything? */
		osmo_fsm_inst_free(fi);
		break;
	}
}

static void fsm_f_null(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
	struct testvlr_priv *priv = fsi_priv(fi);
	uint32_t tmsi = 0;
	const char *imsi = NULL;

	switch (event) {
	case EVT_MS_TX_LU:
		/* send LU to VLR */
		if (priv->mode == MODE_SUCCESS)
			imsi = priv->imsi;
		else
			tmsi = priv->tmsi;
		priv->lu_fsm = vlr_loc_update(fi,
					      EVT_VLR_LU_ACK,
					      EVT_VLR_LU_REJ,
					      NULL,
					      g_vlr, NULL,
					      VLR_LU_TYPE_IMSI_ATTACH, tmsi,
					      imsi, &priv->old_lai,
					      &priv->new_lai,
					      true,
					      true,
					      false,
					      false,
					      true);
		OSMO_ASSERT(priv->subscr);
		osmo_fsm_inst_state_chg(fi, ST_LU_SENT, 0, 0);
		break;
	default:
		break;
	}
}

static void fsm_f_lu_sent(struct osmo_fsm_inst *fi, uint32_t event,
			  void *data)
{
	struct gsm_auth_tuple *at = NULL;
	struct testvlr_priv *priv = fsi_priv(fi);
	uint8_t res_fail[4];
	uint8_t auts[14];

	switch (event) {
	case EVT_VLR_AUTH_REQ:
		at = data;
		OSMO_ASSERT(at);
		DEBUGP(DGPRS, "%s: at->res=%s\n", __func__, osmo_hexdump(at->vec.res, at->vec.res_len));
		switch (priv->mode) {
		case MODE_SUCCESS:
		case MODE_SUCCESS_TMSI:
			/* return matching SRES/AUTS */
			vlr_subscr_rx_auth_resp(priv->subscr, true, false,
					       at->vec.res, at->vec.res_len);
			break;
		case MODE_AUTH_FAIL:
			/* return not matching SRES/AUTS */
			vlr_subscr_rx_auth_resp(priv->subscr, true, false,
					       res_fail, sizeof(res_fail));
			/* FIXME: state transition? */
			break;
		case MODE_AUTH_RESYNC:
			/* return SRES/AUTS requesting re-sync */
			/* FIXME: generate a proper authenticating
			 * re-sync request */
			vlr_subscr_rx_auth_fail(priv->subscr, auts);
			/* FIXME: state transition? */
			osmo_fsm_inst_state_chg(fi, ST_RESYNC_SENT, 0, 0);
			break;
		}
		osmo_fsm_inst_state_chg(fi, ST_WAIT_LU_ACK, 0, 0);
		break;
	case EVT_VLR_LU_REJ:
		{
		uint8_t cause = *(uint8_t *)data;
		LOGP(DGPRS, LOGL_NOTICE, "LU(%s): Rejected; cause=0x%02x\n",
		    priv->imsi, cause);

		}
		break;
	default:
		break;
	}
}

#if 0
static void fsm_f_resync_sent(struct osmo_fsm_inst *fi, uint32_t event,
			      void *data)
{
	struct testvlr_priv *priv = fsi_priv(fi);
	struct gsm_auth_tuple *at = NULL;

	/* second auth request is supposed to succed after the
	 * re-sync procedure before */
	switch (event) {
	case EVT_VLR_AUTH_REQ:
		at = data;
		/* return matching SRES/AUTS now */
		vlr_subscr_rx_auth_resp(priv->subscr, true, false,
				       at->vec.res, at->vec.res_len);
		osmo_fsm_inst_state_chg(fi, ST_WAIT_LU_ACK, 0, 0);
		break;
	}
}
#endif

static void fsm_f_wait_lu_ack(struct osmo_fsm_inst *fi, uint32_t event,
			      void *data)
{
	struct testvlr_priv *priv = fsi_priv(fi);

	switch (event) {
	case EVT_VLR_LU_ACK:
		if (priv->subscr->tmsi != GSM_RESERVED_TMSI) {
			/* we need to send an TMSI REALLOC COMPL */
			vlr_subscr_rx_tmsi_reall_compl(priv->subscr);
		}
		osmo_fsm_inst_state_chg(fi, ST_DONE, 0, 0);
		break;
	case EVT_VLR_LU_REJ:
		osmo_fsm_inst_state_chg(fi, ST_FAILED, 0, 0);
		break;
	}
}

static void fsm_f_imsi_sent(struct osmo_fsm_inst *fi, uint32_t event,
			    void *data)
{
	switch (event) {
	case EVT_MS_TX_ID_RESP:
		break;
	}
}

#if 0
static void fsm_f_areq_sent(struct osmo_fsm_inst *fi, uint32_t event,
			    void *data)
{
	switch (event) {
	case EVT_MS_TX_AUTH_RESP:
		break;
	case EVT_MS_TX_AUTH_FAIL:
		break;
	}
}
#endif

static struct osmo_fsm_state fsm_success_states[] = {
	[ST_NULL] = {
		.in_event_mask = S(EVT_MS_TX_LU),
		.out_state_mask = S(ST_LU_SENT),
		.name = "NULL",
		.action = fsm_f_null,
	},
	[ST_LU_SENT] = {
		.in_event_mask = S(EVT_VLR_AUTH_REQ) |
				 S(EVT_VLR_LU_REJ),
		//.out_state_mask = S(ST_IDREQ_IMSI_SENT) | S(ST_AUTH_REQ_SENT),
		.out_state_mask = S(ST_WAIT_LU_ACK),
		.name = "LU Sent",
		.action = fsm_f_lu_sent,
	},
	[ST_RESYNC_SENT] = {
		.in_event_mask = S(EVT_VLR_AUTH_REQ),
		.out_state_mask = S(ST_WAIT_LU_ACK),
		.name = "AUTH-RESYNC sent",
		.action = fsm_f_imsi_sent,
	},
	[ST_WAIT_LU_ACK] = {
		.in_event_mask = S(EVT_VLR_LU_ACK) |
				 S(EVT_VLR_SET_CIPH) |
				 S(EVT_VLR_LU_REJ),
		.out_state_mask = S(ST_DONE),
		.name = "WAIT-LU-ACK",
		.action = fsm_f_wait_lu_ack,
	},
	[ST_DONE] = {
		.name = "DONE"
	},
};

static struct osmo_fsm vlr_test_fsm = {
	.name = "VLR Test FSM",
	.states = fsm_success_states,
	.num_states = ARRAY_SIZE(fsm_success_states),
	.log_subsys = DGPRS,
	.event_names = f_event_names,
	.allstate_event_mask = S(EVT_MS_CONN_LOST) |
			       S(EVT_VLR_ID_REQ_IMSI) |
			       S(EVT_VLR_ID_REQ_IMEI) |
			       S(EVT_VLR_ID_REQ_IMEISV),
	.allstate_action = fsm_f_allstate,
};

/* Testing of Subscriber_Present_VLR */

enum test_sub_pres_state {
	TSPV_S_INIT,
	TSPV_S_RUNNING,
};

enum test_sub_pres_evt {
	TSPV_E_START,
	TSPV_E_COMPL,
};

static void tspv_f_running(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
	struct vlr_subscr *vsub = fi->priv;

	switch (event) {
	case TSPV_E_COMPL:
		OSMO_ASSERT(vsub);
		OSMO_ASSERT(vsub->ms_not_reachable_flag == false);
		osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL);
		break;
	}
}

static void tspv_f_init(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
	struct osmo_fsm_inst *spv;
	struct vlr_subscr *vsub = fi->priv;

	switch (event) {
	case TSPV_E_START:
		OSMO_ASSERT(vsub);
		vsub->ms_not_reachable_flag = true;
		spv = sub_pres_vlr_fsm_start(fi, vsub, TSPV_E_COMPL);
		OSMO_ASSERT(spv);
		osmo_fsm_inst_state_chg(fi, TSPV_S_RUNNING, 4, 0);
		break;
	}
}

static const struct osmo_fsm_state test_sub_pres_vlr_states[] = {
	[TSPV_S_INIT] = {
		.in_event_mask = S(TSPV_E_START),
		.out_state_mask = S(TSPV_S_RUNNING),
		.name = "INIT",
		.action = tspv_f_init,
	},
	[TSPV_S_RUNNING] = {
		.in_event_mask = S(TSPV_E_COMPL),
		.out_state_mask = 0,
		.name = "RUNNING",
		.action = tspv_f_running,
	},
};

static struct osmo_fsm test_sub_pres_vlr_fsm = {
	.name = "Test Subscriber_Present_VLR",
	.states = test_sub_pres_vlr_states,
	.num_states = ARRAY_SIZE(test_sub_pres_vlr_states),
	.log_subsys = DGPRS,
	.event_names = f_event_names,
	.timer_cb = timer_error_cb,
};

#if 0
static void start_sub_pres_vlr(void *ctx, uint32_t tmsi, const char *imsi)
{
	struct osmo_fsm_inst *fi;
	struct vlr_subscr *vsub = vlr_subscr_alloc(g_vlr);

	vsub->tmsi = tmsi;
	strncpy(vsub->imsi, imsi, sizeof(vsub->imsi));
	fi = osmo_fsm_inst_alloc(&test_sub_pres_vlr_fsm, ctx, vsub, LOGL_DEBUG, vsub->imsi);
	osmo_fsm_inst_dispatch(fi, TSPV_E_START, NULL);
}
#endif

/* Testing of Update_HLR_VLR */

enum test_update_hlr_vlr_state {
	TUHV_S_INIT,
	TUHV_S_RUNNING,
};

enum test_update_hlr_vlr_event {
	TUHV_E_START,
	TUHV_E_COMPL,
};

static void tuhv_f_running(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
	enum gsm48_gmm_cause *res = data;

	switch (event) {
	case TUHV_E_COMPL:
		if (!res) {
			/* Success */
			LOGPFSM(fi, "success\n");
		} else {
			/* error */
			LOGPFSM(fi, "errror cause=0x%u\n", *res);
		}
		osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL);
		break;
	}
}

static void tuhv_f_init(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
	struct osmo_fsm_inst *child;
	struct vlr_subscr *vsub = fi->priv;

	switch (event) {
	case TUHV_E_START:
		child = upd_hlr_vlr_proc_start(fi, vsub, TUHV_E_COMPL);
		OSMO_ASSERT(child);
		osmo_fsm_inst_state_chg(fi, TUHV_S_RUNNING, 4, 0);
		break;
	}
}

static const struct osmo_fsm_state test_upd_hlr_vlr_states[] = {
	[TUHV_S_INIT] = {
		.in_event_mask = S(TUHV_E_START),
		.out_state_mask = S(TUHV_S_RUNNING),
		.name = "INIT",
		.action = tuhv_f_init,
	},
	[TUHV_S_RUNNING] = {
		.in_event_mask = S(TUHV_E_COMPL),
		.out_state_mask = 0,
		.name = "RUNNING",
		.action = tuhv_f_running,
	},
};

static struct osmo_fsm test_upd_hlr_vlr_fsm = {
	.name = "Test Update_HLR_VLR",
	.states = test_upd_hlr_vlr_states,
	.num_states = ARRAY_SIZE(test_upd_hlr_vlr_states),
	.log_subsys = DGPRS,
	.event_names = f_event_names,
	.timer_cb = timer_error_cb,
};

#if 0
static void start_upd_hlr_vlr(void *ctx, uint32_t tmsi, const char *imsi)
{
	struct osmo_fsm_inst *fi;
	struct vlr_subscr *vsub = vlr_subscr_alloc(g_vlr);

	vsub->tmsi = tmsi;
	strncpy(vsub->imsi, imsi, sizeof(vsub->imsi));


	fi = osmo_fsm_inst_alloc(&test_upd_hlr_vlr_fsm, ctx, vsub, LOGL_DEBUG,
				vsub->imsi);
	/* we need to set this to fool vlr.c in an ongoing LU */
	vsub->lu_fsm = fi;
	osmo_fsm_inst_dispatch(fi, TUHV_E_START, NULL);
}
#endif

/***********************************************************************
 * Integration with VLR code
 ***********************************************************************/

static struct vlr_instance *g_vlr;

/* VLR asks us to send an authentication request */
static int msc_vlr_tx_auth_req(void *msc_conn_ref, struct gsm_auth_tuple *at,
			       bool send_autn)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	OSMO_ASSERT(at);
	DEBUGP(DGPRS, "%s: RES=%s\n", __func__,
		osmo_hexdump_nospc(at->vec.res, at->vec.res_len));
	osmo_fsm_inst_dispatch(fi, EVT_VLR_AUTH_REQ, at);
	return 0;
}

/* VLR asks us to send an authentication reject */
static int msc_vlr_tx_auth_rej(void *msc_conn_ref)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	DEBUGP(DGPRS, "%s\n", __func__);
	osmo_fsm_inst_dispatch(fi, EVT_VLR_AUTH_REJ, NULL);
	return 0;
}

/* VLR asks us to transmit an Identity Request of given type */
static int msc_vlr_tx_id_req(void *msc_conn_ref, uint8_t mi_type)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	uint32_t event;

	DEBUGP(DGPRS, "%s (%u)\n", __func__, mi_type);

	switch (mi_type) {
	case GSM_MI_TYPE_IMSI:
		event = EVT_VLR_ID_REQ_IMSI;
		break;
	case GSM_MI_TYPE_IMEI:
		event = EVT_VLR_ID_REQ_IMEI;
		break;
	case GSM_MI_TYPE_IMEISV:
		event = EVT_VLR_ID_REQ_IMEISV;
		break;
	default:
		LOGP(DGPRS, LOGL_ERROR, "Unknown identity 0x%02x\n",
			mi_type);
		return -1;
	}
	osmo_fsm_inst_dispatch(fi, event, NULL);
	return 0;
}

/* VLR asks us to transmit a Location Update Accept */
static int msc_vlr_tx_lu_ack(void *msc_conn_ref, uint32_t send_tmsi)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	DEBUGP(DGPRS, "%s\n", __func__);
	osmo_fsm_inst_dispatch(fi, EVT_VLR_LU_ACK, NULL);
	return 0;
}

/* VLR asks us to transmit a Location Update Reject */
static int msc_vlr_tx_lu_rej(void *msc_conn_ref, uint8_t cause)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	DEBUGP(DGPRS, "%s\n", __func__);
	osmo_fsm_inst_dispatch(fi, EVT_VLR_LU_REJ, (void *) &cause);
	return 0;
}

static int msc_vlr_set_ciph_mode(void *msc_conn_ref, enum vlr_ciph mode,
				 bool retrieve_imeisv)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	DEBUGP(DGPRS, "%s\n", __func__);
	osmo_fsm_inst_dispatch(fi, EVT_VLR_SET_CIPH, NULL);
	return 0;
}

/* VLR informs us that the subscriber data has somehow been modified */
static void msc_vlr_subscr_update(struct vlr_subscr *subscr)
{
	DEBUGP(DGPRS, "%s\n", __func__);
	/* FIXME */
}

static void msc_vlr_subscr_assoc(void *msc_conn_ref, struct vlr_subscr *vsub)
{
	struct osmo_fsm_inst *fi = msc_conn_ref;
	struct testvlr_priv *priv = fsi_priv(fi);
	DEBUGP(DGPRS, "%s(%p, %s)\n", __func__, msc_conn_ref, vlr_subscr_name(vsub));
	priv->subscr = vsub;
}

/* operations that we need to implement for libvlr */
static const struct vlr_ops test_vlr_ops = {
	.tx_auth_req = msc_vlr_tx_auth_req,
	.tx_auth_rej = msc_vlr_tx_auth_rej,
	.tx_id_req = msc_vlr_tx_id_req,
	.tx_lu_acc = msc_vlr_tx_lu_ack,
	.tx_lu_rej = msc_vlr_tx_lu_rej,
	.set_ciph_mode = msc_vlr_set_ciph_mode,
	.subscr_update = msc_vlr_subscr_update,
	.subscr_assoc = msc_vlr_subscr_assoc,
};

/***********************************************************************
 * Actual test cases
 ***********************************************************************/


static struct osmo_fsm_inst *
start_lu(enum testvlr_mode mode, uint32_t tmsi,
	 const char *imsi, const char *imei)
{
	struct testvlr_priv *vp;
	struct osmo_fsm_inst *fi;

	vp = talloc_zero(tall_bsc_ctx, struct testvlr_priv);
	vp->mode = mode;
	vp->tmsi = tmsi;
	strncpy(vp->imsi, imsi, sizeof(vp->imsi));
	strncpy(vp->imei, imei, sizeof(vp->imei));

	fi = osmo_fsm_inst_alloc(&vlr_test_fsm, vp, vp, LOGL_DEBUG, vp->imsi);
	osmo_fsm_inst_dispatch(fi, EVT_MS_TX_LU, NULL);
	return fi;
}

/***********************************************************************
 * Main / Misc
 ***********************************************************************/

static struct osmo_timer_list tmr;

static void timer_cb(void *data)
{
	uint32_t tmsi = rand() % 1000000;
	uint64_t imsi = 901790000000000 + tmsi;
	char imsi_str[32];

	snprintf(imsi_str, sizeof(imsi_str), "%lu", imsi);
	//start_lu(MODE_AUTH_FAIL, tmsi, imsi_str, "23422342");
	start_lu(MODE_SUCCESS_TMSI, tmsi, imsi_str, "23422342");
	//start_lu(MODE_SUCCESS, tmsi, imsi_str, "23422342");
	//start_upd_hlr_vlr(tall_bsc_ctx, tmsi, imsi_str);
	//start_sub_pres_vlr(tall_bsc_ctx);
	osmo_timer_schedule(&tmr, 8, 0);
}

static void sighdlr(int sig)
{
	switch (sig) {
	case SIGUSR1:
		talloc_report_full(tall_bsc_ctx, stderr);
		break;
	}
}

int main(int argc, char **argv)
{
	tall_bsc_ctx = talloc_named_const(NULL, 1, "tall_bsc_ctx");

	signal(SIGUSR1, sighdlr);

	osmo_init_logging(&log_info);

	g_vlr = vlr_alloc(NULL, &test_vlr_ops);
	vlr_start("VLRTEST", g_vlr, "localhost", 2222);
	OSMO_ASSERT(g_vlr);
	osmo_fsm_register(&vlr_test_fsm);
	osmo_fsm_register(&test_sub_pres_vlr_fsm);
	osmo_fsm_register(&test_upd_hlr_vlr_fsm);

	g_vlr->cfg.assign_tmsi = true;

	tmr.cb = timer_cb;
	timer_cb(NULL);

	while (1) {
		osmo_select_main(0);
	}

	exit(0);
}

struct gsm_subscriber_connection;
int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn) { return 0; }