summaryrefslogtreecommitdiffstats
path: root/openbsc/tests/mgcp/mgcp_test.c
blob: 498a1d8e68eb3d2732a1513723c361e1c377211e (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
/*
 * (C) 2011-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
 * (C) 2011-2012 by On-Waves
 * 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/>.
 */
#undef _GNU_SOURCE
#define _GNU_SOURCE

#include <openbsc/mgcp.h>
#include <openbsc/mgcp_internal.h>

#include <osmocom/core/application.h>
#include <osmocom/core/talloc.h>
#include <string.h>
#include <limits.h>
#include <dlfcn.h>
#include <time.h>
#include <math.h>

char *strline_r(char *str, char **saveptr);

const char *strline_test_data =
    "one CR\r"
    "two CR\r"
    "\r"
    "one CRLF\r\n"
    "two CRLF\r\n"
    "\r\n"
    "one LF\n"
    "two LF\n"
    "\n"
    "mixed (4 lines)\r\r\n\n\r\n";

#define EXPECTED_NUMBER_OF_LINES 13

static void test_strline(void)
{
	char *save = NULL;
	char *line;
	char buf[2048];
	int counter = 0;

	strncpy(buf, strline_test_data, sizeof(buf));

	for (line = strline_r(buf, &save); line;
	     line = strline_r(NULL, &save)) {
		printf("line: '%s'\n", line);
		counter++;
	}

	OSMO_ASSERT(counter == EXPECTED_NUMBER_OF_LINES);
}

#define AUEP1	"AUEP 158663169 ds/e1-1/2@172.16.6.66 MGCP 1.0\r\n"
#define AUEP1_RET "200 158663169 OK\r\n"
#define AUEP2	"AUEP 18983213 ds/e1-2/1@172.16.6.66 MGCP 1.0\r\n"
#define AUEP2_RET "500 18983213 FAIL\r\n"
#define EMPTY	"\r\n"
#define EMPTY_RET NULL
#define SHORT	"CRCX \r\n"
#define SHORT_RET "510 000000 FAIL\r\n"

#define MDCX_WRONG_EP "MDCX 18983213 ds/e1-3/1@172.16.6.66 MGCP 1.0\r\n"
#define MDCX_ERR_RET "510 18983213 FAIL\r\n"
#define MDCX_UNALLOCATED "MDCX 18983214 ds/e1-1/2@172.16.6.66 MGCP 1.0\r\n"
#define MDCX_RET "400 18983214 FAIL\r\n"
#define MDCX3 "MDCX 18983215 1@mgw MGCP 1.0\r\n"
#define MDCX3_RET "200 18983215 OK\r\n"		\
		 "I: 1\n"			\
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 0 RTP/AVP 126\r\n"	\
		 "a=rtpmap:126 AMR/8000\r\n"	\
		 "a=ptime:20\r\n"
#define MDCX4 "MDCX 18983216 1@mgw MGCP 1.0\r\n" \
		 "M: sendrecv\r"		\
		 "C: 2\r\n"          \
		 "I: 1\r\n"                    \
		 "L: p:20, a:AMR, nt:IN\r\n"    \
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 4441 RTP/AVP 99\r\n"	\
		 "a=rtpmap:99 AMR/8000\r\n"	\
		 "a=ptime:40\r\n"
#define MDCX4_RET(Ident) "200 " Ident " OK\r\n"	\
		 "I: 1\n"			\
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 0 RTP/AVP 126\r\n"	\
		 "a=rtpmap:126 AMR/8000\r\n"	\
		 "a=ptime:20\r\n"

#define MDCX4_PT1 "MDCX 18983217 1@mgw MGCP 1.0\r\n" \
		 "M: sendrecv\r"		\
		 "C: 2\r\n"          \
		 "I: 1\r\n"                    \
		 "L: p:20-40, a:AMR, nt:IN\r\n"    \
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 4441 RTP/AVP 99\r\n"	\
		 "a=rtpmap:99 AMR/8000\r\n"	\
		 "a=ptime:40\r\n"

#define MDCX4_PT2 "MDCX 18983218 1@mgw MGCP 1.0\r\n" \
		 "M: sendrecv\r"		\
		 "C: 2\r\n"          \
		 "I: 1\r\n"                    \
		 "L: p:20-20, a:AMR, nt:IN\r\n"    \
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 4441 RTP/AVP 99\r\n"	\
		 "a=rtpmap:99 AMR/8000\r\n"	\
		 "a=ptime:40\r\n"

#define MDCX4_PT3 "MDCX 18983219 1@mgw MGCP 1.0\r\n" \
		 "M: sendrecv\r"		\
		 "C: 2\r\n"          \
		 "I: 1\r\n"                    \
		 "L: a:AMR, nt:IN\r\n"    \
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 4441 RTP/AVP 99\r\n"	\
		 "a=rtpmap:99 AMR/8000\r\n"	\
		 "a=ptime:40\r\n"

#define MDCX4_SO "MDCX 18983220 1@mgw MGCP 1.0\r\n" \
		 "M: sendonly\r"		\
		 "C: 2\r\n"          \
		 "I: 1\r\n"                    \
		 "L: p:20, a:AMR, nt:IN\r\n"    \
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 4441 RTP/AVP 99\r\n"	\
		 "a=rtpmap:99 AMR/8000\r\n"	\
		 "a=ptime:40\r\n"

#define SHORT2	"CRCX 1"
#define SHORT2_RET "510 000000 FAIL\r\n"
#define SHORT3	"CRCX 1 1@mgw"
#define SHORT4	"CRCX 1 1@mgw MGCP"
#define SHORT5	"CRCX 1 1@mgw MGCP 1.0"

#define CRCX	 "CRCX 2 1@mgw MGCP 1.0\r\n"	\
		 "M: recvonly\r\n"		\
		 "C: 2\r\n"			\
		 "L: p:20\r\n"		\
		 "\r\n"				\
		 "v=0\r\n"			\
		 "c=IN IP4 123.12.12.123\r\n"	\
		 "m=audio 5904 RTP/AVP 97\r\n"	\
		 "a=rtpmap:97 GSM-EFR/8000\r\n"	\
		 "a=ptime:40\r\n"

#define CRCX_RET "200 2 OK\r\n"			\
		 "I: 1\n"			\
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 1 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 0 RTP/AVP 126\r\n"	\
		 "a=rtpmap:126 AMR/8000\r\n"	\
		 "a=ptime:20\r\n"

#define CRCX_ZYN "CRCX 2 1@mgw MGCP 1.0\r"	\
		 "M: recvonly\r"		\
		 "C: 2\r\r"			\
		 "v=0\r"			\
		 "c=IN IP4 123.12.12.123\r"	\
		 "m=audio 5904 RTP/AVP 97\r"	\
		 "a=rtpmap:97 GSM-EFR/8000\r"

#define CRCX_ZYN_RET "200 2 OK\r\n"		\
		 "I: 2\n"			\
		 "\n"				\
		 "v=0\r\n"			\
		 "o=- 2 23 IN IP4 0.0.0.0\r\n"	\
		 "c=IN IP4 0.0.0.0\r\n"		\
		 "t=0 0\r\n"			\
		 "m=audio 0 RTP/AVP 126\r\n"	\
		 "a=rtpmap:126 AMR/8000\r\n"	\
		 "a=ptime:20\r\n"

#define DLCX	 "DLCX 7 1@mgw MGCP 1.0\r\n"	\
		 "C: 2\r\n"

#define DLCX_RET "250 7 OK\r\n"			\
		 "P: PS=0, OS=0, PR=0, OR=0, PL=0, JI=0\r\n" \
		 "X-Osmo-CP: EC TIS=0, TOS=0, TIR=0, TOR=0\r\n"

#define RQNT	 "RQNT 186908780 1@mgw MGCP 1.0\r\n"	\
		 "X: B244F267488\r\n"			\
		 "S: D/9\r\n"

#define RQNT2	 "RQNT 186908781 1@mgw MGCP 1.0\r\n"	\
		 "X: ADD4F26746F\r\n"			\
		 "R: D/[0-9#*](N), G/ft, fxr/t38\r\n"

#define RQNT1_RET "200 186908780 OK\r\n"
#define RQNT2_RET "200 186908781 OK\r\n"

#define PTYPE_IGNORE 0 /* == default initializer */
#define PTYPE_NONE 128
#define PTYPE_NYI  PTYPE_NONE

struct mgcp_test {
	const char *name;
	const char *req;
	const char *exp_resp;
	int exp_net_ptype;
	int exp_bts_ptype;
};

static const struct mgcp_test tests[] = {
	{ "AUEP1", AUEP1, AUEP1_RET },
	{ "AUEP2", AUEP2, AUEP2_RET },
	{ "MDCX1", MDCX_WRONG_EP, MDCX_ERR_RET },
	{ "MDCX2", MDCX_UNALLOCATED, MDCX_RET },
	{ "CRCX", CRCX, CRCX_RET, 97, 126 },
	{ "MDCX3", MDCX3, MDCX3_RET, PTYPE_NONE, 126 },
	{ "MDCX4", MDCX4, MDCX4_RET("18983216"), 99, 126 },
	{ "MDCX4_PT1", MDCX4_PT1, MDCX4_RET("18983217"), 99, 126 },
	{ "MDCX4_PT2", MDCX4_PT2, MDCX4_RET("18983218"), 99, 126 },
	{ "MDCX4_PT3", MDCX4_PT3, MDCX4_RET("18983219"), 99, 126 },
	{ "MDCX4_SO", MDCX4_SO, MDCX4_RET("18983220"), 99, 126 },
	{ "DLCX", DLCX, DLCX_RET, -1, -1 },
	{ "CRCX_ZYN", CRCX_ZYN, CRCX_ZYN_RET, 97, 126 },
	{ "EMPTY", EMPTY, EMPTY_RET },
	{ "SHORT1", SHORT, SHORT_RET },
	{ "SHORT2", SHORT2, SHORT2_RET },
	{ "SHORT3", SHORT3, SHORT2_RET },
	{ "SHORT4", SHORT4, SHORT2_RET },
	{ "RQNT1", RQNT, RQNT1_RET },
	{ "RQNT2", RQNT2, RQNT2_RET },
	{ "DLCX", DLCX, DLCX_RET, -1, -1 },
};

static const struct mgcp_test retransmit[] = {
	{ "CRCX", CRCX, CRCX_RET },
	{ "RQNT1", RQNT, RQNT1_RET },
	{ "RQNT2", RQNT2, RQNT2_RET },
	{ "MDCX3", MDCX3, MDCX3_RET },
	{ "DLCX", DLCX, DLCX_RET },
};

static struct msgb *create_msg(const char *str)
{
	struct msgb *msg;

	msg = msgb_alloc_headroom(4096, 128, "MGCP msg");
	int len = sprintf((char *)msg->data, "%s", str);
	msg->l2h = msgb_put(msg, len);
	return msg;
}

static int last_endpoint = -1;

static int mgcp_test_policy_cb(struct mgcp_trunk_config *cfg, int endpoint,
			       int state, const char *transactio_id)
{
	fprintf(stderr, "Policy CB got state %d on endpoint %d\n",
		state, endpoint);
	last_endpoint = endpoint;
	return MGCP_POLICY_CONT;
}

#define MGCP_DUMMY_LOAD 0x23
static int dummy_packets = 0;
/* override and forward */
ssize_t sendto(int sockfd, const void *buf, size_t len, int flags,
		const struct sockaddr *dest_addr, socklen_t addrlen)
{
	typedef ssize_t (*sendto_t)(int, const void *, size_t, int,
			const struct sockaddr *, socklen_t);
	static sendto_t real_sendto = NULL;
	uint32_t dest_host = htonl(((struct sockaddr_in *)dest_addr)->sin_addr.s_addr);
	int      dest_port = htons(((struct sockaddr_in *)dest_addr)->sin_port);

	if (!real_sendto)
		real_sendto = dlsym(RTLD_NEXT, "sendto");

	if (len == 1 && ((const char *)buf)[0] == MGCP_DUMMY_LOAD ) {
		fprintf(stderr, "Dummy packet to 0x%08x:%d, msg length %zu\n%s\n\n",
		       dest_host, dest_port,
		       len, osmo_hexdump(buf, len));
		dummy_packets += 1;
	}

	return real_sendto(sockfd, buf, len, flags, dest_addr, addrlen);
}

static int64_t force_monotonic_time_us = -1;
/* override and forward */
int clock_gettime(clockid_t clk_id, struct timespec *tp)
{
	typedef int (*clock_gettime_t)(clockid_t clk_id, struct timespec *tp);
	static clock_gettime_t real_clock_gettime = NULL;

	if (!real_clock_gettime)
		real_clock_gettime = dlsym(RTLD_NEXT, "clock_gettime");

	if (clk_id == CLOCK_MONOTONIC && force_monotonic_time_us >= 0) {
		tp->tv_sec = force_monotonic_time_us / 1000000;
		tp->tv_nsec = (force_monotonic_time_us % 1000000) * 1000;
		return 0;
	}

	return real_clock_gettime(clk_id, tp);
}

#define CONN_UNMODIFIED (0x1000)

static void test_values(void)
{
	/* Check that NONE disables all output */
	OSMO_ASSERT((MGCP_CONN_NONE & MGCP_CONN_RECV_SEND) == 0)

	/* Check that LOOPBACK enables all output */
	OSMO_ASSERT((MGCP_CONN_LOOPBACK & MGCP_CONN_RECV_SEND) ==
		    MGCP_CONN_RECV_SEND)
}


static void test_messages(void)
{
	struct mgcp_config *cfg;
	struct mgcp_endpoint *endp;
	int i;

	cfg = mgcp_config_alloc();

	cfg->trunk.number_endpoints = 64;
	mgcp_endpoints_allocate(&cfg->trunk);

	cfg->policy_cb = mgcp_test_policy_cb;

	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));

	/* reset endpoints */
	for (i = 0; i < cfg->trunk.number_endpoints; i++) {
		endp = &cfg->trunk.endpoints[i];
		endp->net_end.payload_type = PTYPE_NONE;
		endp->net_end.packet_duration_ms = -1;

		OSMO_ASSERT(endp->conn_mode == MGCP_CONN_NONE);
		endp->conn_mode |= CONN_UNMODIFIED;
	}

	for (i = 0; i < ARRAY_SIZE(tests); i++) {
		const struct mgcp_test *t = &tests[i];
		struct msgb *inp;
		struct msgb *msg;

		printf("Testing %s\n", t->name);

		last_endpoint = -1;
		dummy_packets = 0;

		inp = create_msg(t->req);
		msg = mgcp_handle_message(cfg, inp);
		msgb_free(inp);
		if (!t->exp_resp) {
			if (msg)
				printf("%s failed '%s'\n", t->name, (char *) msg->data);
		} else if (strcmp((char *) msg->data, t->exp_resp) != 0)
			printf("%s failed '%s'\n", t->name, (char *) msg->data);
		msgb_free(msg);

		if (dummy_packets)
			printf("Dummy packets: %d\n", dummy_packets);

		if (last_endpoint != -1) {
			endp = &cfg->trunk.endpoints[last_endpoint];

			if (endp->net_end.packet_duration_ms != -1)
				printf("Detected packet duration: %d\n",
				       endp->net_end.packet_duration_ms);
			else
				printf("Packet duration not set\n");
			if (endp->local_options.pkt_period_min ||
			    endp->local_options.pkt_period_max)
				printf("Requested packetetization period: "
				       "%d-%d\n",
				       endp->local_options.pkt_period_min,
				       endp->local_options.pkt_period_max);
			else
				printf("Requested packetization period not set\n");

			if ((endp->conn_mode & CONN_UNMODIFIED) == 0) {
				printf("Connection mode: %d:%s%s%s%s\n",
				       endp->conn_mode,
				       !endp->conn_mode ? " NONE" : "",
				       endp->conn_mode & MGCP_CONN_SEND_ONLY ?
				       " SEND" : "",
				       endp->conn_mode & MGCP_CONN_RECV_ONLY ?
				       " RECV" : "",
				       endp->conn_mode & MGCP_CONN_LOOPBACK &
				       ~MGCP_CONN_RECV_SEND ?
				       " LOOP" : "");
				fprintf(stderr,
					"BTS output %sabled, NET output %sabled\n",
					endp->bts_end.output_enabled ? "en" : "dis",
					endp->net_end.output_enabled ? "en" : "dis");
			} else
				printf("Connection mode not set\n");

			OSMO_ASSERT(endp->net_end.output_enabled ==
				    (endp->conn_mode & MGCP_CONN_SEND_ONLY ? 1 : 0));
			OSMO_ASSERT(endp->bts_end.output_enabled ==
				    (endp->conn_mode & MGCP_CONN_RECV_ONLY ? 1 : 0));

			endp->net_end.packet_duration_ms = -1;
			endp->local_options.pkt_period_min = 0;
			endp->local_options.pkt_period_max = 0;
			endp->conn_mode |= CONN_UNMODIFIED;
		}


		/* Check detected payload type */
		if (t->exp_net_ptype != PTYPE_IGNORE ||
		    t->exp_bts_ptype != PTYPE_IGNORE) {
			OSMO_ASSERT(last_endpoint != -1);
			endp = &cfg->trunk.endpoints[last_endpoint];

			fprintf(stderr, "endpoint %d: "
				"payload type BTS %d (exp %d), NET %d (exp %d)\n",
				last_endpoint,
				endp->bts_end.payload_type, t->exp_bts_ptype,
				endp->net_end.payload_type, t->exp_net_ptype);

			if (t->exp_bts_ptype != PTYPE_IGNORE)
				OSMO_ASSERT(endp->bts_end.payload_type ==
					    t->exp_bts_ptype);
			if (t->exp_net_ptype != PTYPE_IGNORE)
				OSMO_ASSERT(endp->net_end.payload_type ==
					    t->exp_net_ptype);

			/* Reset them again for next test */
			endp->net_end.payload_type = PTYPE_NONE;
		}
	}

	talloc_free(cfg);
}

static void test_retransmission(void)
{
	struct mgcp_config *cfg;
	int i;

	cfg = mgcp_config_alloc();

	cfg->trunk.number_endpoints = 64;
	mgcp_endpoints_allocate(&cfg->trunk);

	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));

	/* reset endpoints */
	for (i = 0; i < cfg->trunk.number_endpoints; i++) {
		struct mgcp_endpoint *endp;
		endp = &cfg->trunk.endpoints[i];
		endp->bts_end.packet_duration_ms = 20;
	}

	for (i = 0; i < ARRAY_SIZE(retransmit); i++) {
		const struct mgcp_test *t = &retransmit[i];
		struct msgb *inp;
		struct msgb *msg;

		printf("Testing %s\n", t->name);

		inp = create_msg(t->req);
		msg = mgcp_handle_message(cfg, inp);
		msgb_free(inp);
		if (strcmp((char *) msg->data, t->exp_resp) != 0)
			printf("%s failed '%s'\n", t->name, (char *) msg->data);
		msgb_free(msg);

		/* Retransmit... */
		printf("Re-transmitting %s\n", t->name);
		inp = create_msg(t->req);
		msg = mgcp_handle_message(cfg, inp);
		msgb_free(inp);
		if (strcmp((char *) msg->data, t->exp_resp) != 0)
			printf("%s failed '%s'\n", t->name, (char *) msg->data);
		msgb_free(msg);
	}

	talloc_free(cfg);
}

static int rqnt_cb(struct mgcp_endpoint *endp, char _tone)
{
	ptrdiff_t tone = _tone;
	endp->cfg->data = (void *) tone;
	return 0;
}

static void test_rqnt_cb(void)
{
	struct mgcp_config *cfg;
	struct msgb *inp, *msg;

	cfg = mgcp_config_alloc();
	cfg->rqnt_cb = rqnt_cb;

	cfg->trunk.number_endpoints = 64;
	mgcp_endpoints_allocate(&cfg->trunk);

	mgcp_endpoints_allocate(mgcp_trunk_alloc(cfg, 1));

	inp = create_msg(CRCX);
	msgb_free(mgcp_handle_message(cfg, inp));
	msgb_free(inp);

	/* send the RQNT and check for the CB */
	inp = create_msg(RQNT);
	msg = mgcp_handle_message(cfg, inp);
	if (strncmp((const char *) msg->l2h, "200", 3) != 0) {
		printf("FAILED: message is not 200. '%s'\n", msg->l2h);
		abort();
	}

	if (cfg->data != (void *) '9') {
		printf("FAILED: callback not called: %p\n", cfg->data);
		abort();
	}

	msgb_free(msg);
	msgb_free(inp);

	inp = create_msg(DLCX);
	msgb_free(mgcp_handle_message(cfg, inp));
	msgb_free(inp);
	talloc_free(cfg);
}

struct pl_test {
	int		cycles;
	uint16_t	base_seq;
	uint16_t	max_seq;
	uint32_t	packets;

	uint32_t	expected;
	int		loss;
};

static const struct pl_test pl_test_dat[] = {
	/* basic.. just one package */
	{ .cycles = 0, .base_seq = 0, .max_seq = 0, .packets = 1, .expected = 1, .loss = 0},
	/* some packages and a bit of loss */
	{ .cycles = 0, .base_seq = 0, .max_seq = 100, .packets = 100, .expected = 101, .loss = 1},
	/* wrap around */
	{ .cycles = 1<<16, .base_seq = 0xffff, .max_seq = 2, .packets = 4, .expected = 4, .loss = 0},
	/* min loss */
	{ .cycles = 0, .base_seq = 0, .max_seq = 0, .packets = UINT_MAX, .expected = 1, .loss = INT_MIN },
	/* max loss, with wrap around on expected max */
	{ .cycles = INT_MAX, .base_seq = 0, .max_seq = UINT16_MAX, .packets = 0, .expected = ((uint32_t)(INT_MAX) + UINT16_MAX + 1), .loss = INT_MAX }, 
};

static void test_packet_loss_calc(void)
{
	int i;
	printf("Testing packet loss calculation.\n");

	for (i = 0; i < ARRAY_SIZE(pl_test_dat); ++i) {
		uint32_t expected;
		int loss;
		struct mgcp_rtp_state state;
		struct mgcp_rtp_end rtp;
		memset(&state, 0, sizeof(state));
		memset(&rtp, 0, sizeof(rtp));

		state.initialized = 1;
		state.base_seq = pl_test_dat[i].base_seq;
		state.out_stream.last_seq = pl_test_dat[i].max_seq;
		state.cycles = pl_test_dat[i].cycles;

		rtp.packets = pl_test_dat[i].packets;
		mgcp_state_calc_loss(&state, &rtp, &expected, &loss);

		if (loss != pl_test_dat[i].loss || expected != pl_test_dat[i].expected) {
			printf("FAIL: Wrong exp/loss at idx(%d) Loss(%d vs. %d) Exp(%u vs. %u)\n",
				i, loss, pl_test_dat[i].loss,
				expected, pl_test_dat[i].expected);
		}
	}
}

static void test_mgcp_stats(void)
{
	printf("Testing stat parsing\n");

	uint32_t bps, bos, pr, _or, jitter;
	struct msgb *msg;
	int loss;
	int rc;

	msg = create_msg(DLCX_RET);
	rc = mgcp_parse_stats(msg, &bps, &bos, &pr, &_or, &loss, &jitter);
	printf("Parsing result: %d\n", rc);
	if (bps != 0 || bos != 0 || pr != 0 ||  _or != 0 || loss != 0 || jitter != 0)
		printf("FAIL: Parsing failed1.\n");
	msgb_free(msg);

	msg = create_msg("250 7 OK\r\nP: PS=10, OS=20, PR=30, OR=40, PL=-3, JI=40\r\n");
	rc = mgcp_parse_stats(msg, &bps, &bos, &pr, &_or, &loss, &jitter);
	printf("Parsing result: %d\n", rc);
	if (bps != 10 || bos != 20 || pr != 30 || _or != 40 || loss != -3 || jitter != 40)
		printf("FAIL: Parsing failed2.\n");
	msgb_free(msg);
}

struct rtp_packet_info {
	float txtime;
	int len;
	char *data;
};

struct rtp_packet_info test_rtp_packets1[] = {
	/* RTP: SeqNo=0, TS=0 */
	{0.000000, 20, "\x80\x62\x00\x00\x00\x00\x00\x00\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=1, TS=160 */
	{0.020000, 20, "\x80\x62\x00\x01\x00\x00\x00\xA0\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=2, TS=320 */
	{0.040000, 20, "\x80\x62\x00\x02\x00\x00\x01\x40\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* Repeat RTP timestamp: */
	/* RTP: SeqNo=3, TS=320 */
	{0.060000, 20, "\x80\x62\x00\x03\x00\x00\x01\x40\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=4, TS=480 */
	{0.080000, 20, "\x80\x62\x00\x04\x00\x00\x01\xE0\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=5, TS=640 */
	{0.100000, 20, "\x80\x62\x00\x05\x00\x00\x02\x80\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* Double skip RTP timestamp (delta = 2*160): */
	/* RTP: SeqNo=6, TS=960 */
	{0.120000, 20, "\x80\x62\x00\x06\x00\x00\x03\xC0\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=7, TS=1120 */
	{0.140000, 20, "\x80\x62\x00\x07\x00\x00\x04\x60\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=8, TS=1280 */
	{0.160000, 20, "\x80\x62\x00\x08\x00\x00\x05\x00\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* Non 20ms RTP timestamp (delta = 120): */
	/* RTP: SeqNo=9, TS=1400 */
	{0.180000, 20, "\x80\x62\x00\x09\x00\x00\x05\x78\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=10, TS=1560 */
	{0.200000, 20, "\x80\x62\x00\x0A\x00\x00\x06\x18\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=11, TS=1720 */
	{0.220000, 20, "\x80\x62\x00\x0B\x00\x00\x06\xB8\x11\x22\x33\x44"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* SSRC changed to 0x10203040, RTP timestamp jump */
	/* RTP: SeqNo=12, TS=34688 */
	{0.240000, 20, "\x80\x62\x00\x0C\x00\x00\x87\x80\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=13, TS=34848 */
	{0.260000, 20, "\x80\x62\x00\x0D\x00\x00\x88\x20\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=14, TS=35008 */
	{0.280000, 20, "\x80\x62\x00\x0E\x00\x00\x88\xC0\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* Non 20ms RTP timestamp (delta = 120): */
	/* RTP: SeqNo=15, TS=35128 */
	{0.300000, 20, "\x80\x62\x00\x0F\x00\x00\x89\x38\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=16, TS=35288 */
	{0.320000, 20, "\x80\x62\x00\x10\x00\x00\x89\xD8\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=17, TS=35448 */
	{0.340000, 20, "\x80\x62\x00\x11\x00\x00\x8A\x78\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x8A\xAB\xCD\xEF"},
	/* SeqNo increment by 2, RTP timestamp delta = 320: */
	/* RTP: SeqNo=19, TS=35768 */
	{0.360000, 20, "\x80\x62\x00\x13\x00\x00\x8B\xB8\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=20, TS=35928 */
	{0.380000, 20, "\x80\x62\x00\x14\x00\x00\x8C\x58\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=21, TS=36088 */
	{0.380000, 20, "\x80\x62\x00\x15\x00\x00\x8C\xF8\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* Repeat last packet */
	/* RTP: SeqNo=21, TS=36088 */
	{0.400000, 20, "\x80\x62\x00\x15\x00\x00\x8C\xF8\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=22, TS=36248 */
	{0.420000, 20, "\x80\x62\x00\x16\x00\x00\x8D\x98\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=23, TS=36408 */
	{0.440000, 20, "\x80\x62\x00\x17\x00\x00\x8E\x38\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* Don't increment SeqNo but increment timestamp by 160 */
	/* RTP: SeqNo=23, TS=36568 */
	{0.460000, 20, "\x80\x62\x00\x17\x00\x00\x8E\xD8\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=24, TS=36728 */
	{0.480000, 20, "\x80\x62\x00\x18\x00\x00\x8F\x78\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=25, TS=36888 */
	{0.500000, 20, "\x80\x62\x00\x19\x00\x00\x90\x18\x10\x20\x30\x40"
		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* SSRC changed to 0x50607080, RTP timestamp jump, Delay of 1.5s,
	 * SeqNo jump */
	/* RTP: SeqNo=1000, TS=160000 */
	{2.000000, 20, "\x80\x62\x03\xE8\x00\x02\x71\x00\x50\x60\x70\x80"
			"\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=1001, TS=160160 */
	{2.020000, 20, "\x80\x62\x03\xE9\x00\x02\x71\xA0\x50\x60\x70\x80"
			"\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
	/* RTP: SeqNo=1002, TS=160320 */
	{2.040000, 20, "\x80\x62\x03\xEA\x00\x02\x72\x40\x50\x60\x70\x80"
			"\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
};

void mgcp_patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state,
			  struct mgcp_rtp_end *rtp_end, struct sockaddr_in *addr,
			  char *data, int len);

static void test_packet_error_detection(int patch_ssrc, int patch_ts)
{
	int i;

	struct mgcp_trunk_config trunk;
	struct mgcp_endpoint endp;
	struct mgcp_rtp_state state;
	struct mgcp_rtp_end *rtp = &endp.net_end;
	struct sockaddr_in addr = {0};
	char buffer[4096];
	uint32_t last_ssrc = 0;
	uint32_t last_timestamp = 0;
	uint32_t last_seqno = 0;
	int last_in_ts_err_cnt = 0;
	int last_out_ts_err_cnt = 0;

	printf("Testing packet error detection%s%s.\n",
	       patch_ssrc ? ", patch SSRC" : "",
	       patch_ts ? ", patch timestamps" : "");

	memset(&trunk, 0, sizeof(trunk));
	memset(&endp, 0, sizeof(endp));
	memset(&state, 0, sizeof(state));

	trunk.number_endpoints = 1;
	trunk.endpoints = &endp;
	trunk.force_constant_ssrc = patch_ssrc;
	trunk.force_aligned_timing = patch_ts;

	endp.tcfg = &trunk;

	/* This doesn't free endp but resets/frees all fields of the structure
	 * and invokes mgcp_rtp_end_reset() for each mgcp_rtp_end. OTOH, it
	 * expects valid pointer fields (either NULL or talloc'ed), so the
	 * memset is still needed. It also requires that endp.tcfg and
	 * trunk.endpoints are set up properly. */
	mgcp_free_endp(&endp);

	rtp->payload_type = 98;

	for (i = 0; i < ARRAY_SIZE(test_rtp_packets1); ++i) {
		struct rtp_packet_info *info = test_rtp_packets1 + i;

		force_monotonic_time_us = round(1000000.0 * info->txtime);

		OSMO_ASSERT(info->len <= sizeof(buffer));
		OSMO_ASSERT(info->len >= 0);
		memmove(buffer, info->data, info->len);

		mgcp_rtp_end_config(&endp, 1, rtp);

		mgcp_patch_and_count(&endp, &state, rtp, &addr,
				     buffer, info->len);

		if (state.out_stream.ssrc != last_ssrc) {
			printf("Output SSRC changed to %08x\n",
			       state.out_stream.ssrc);
			last_ssrc = state.out_stream.ssrc;
		}

		printf("In TS: %d, dTS: %d, Seq: %d\n",
		       state.in_stream.last_timestamp,
		       state.in_stream.last_tsdelta,
		       state.in_stream.last_seq);

		printf("Out TS change: %d, dTS: %d, Seq change: %d, "
		       "TS Err change: in %+d, out %+d\n",
		       state.out_stream.last_timestamp - last_timestamp,
		       state.out_stream.last_tsdelta,
		       state.out_stream.last_seq - last_seqno,
		       state.in_stream.err_ts_counter - last_in_ts_err_cnt,
		       state.out_stream.err_ts_counter - last_out_ts_err_cnt);

		printf("Stats: Jitter = %u, Transit = %d\n",
		       mgcp_state_calc_jitter(&state), state.transit);

		last_in_ts_err_cnt = state.in_stream.err_ts_counter;
		last_out_ts_err_cnt = state.out_stream.err_ts_counter;
		last_timestamp = state.out_stream.last_timestamp;
		last_seqno = state.out_stream.last_seq;
	}

	force_monotonic_time_us = -1;
}

int main(int argc, char **argv)
{
	osmo_init_logging(&log_info);

	test_strline();
	test_values();
	test_messages();
	test_retransmission();
	test_packet_loss_calc();
	test_rqnt_cb();
	test_mgcp_stats();
	test_packet_error_detection(1, 0);
	test_packet_error_detection(0, 0);
	test_packet_error_detection(0, 1);
	test_packet_error_detection(1, 1);

	printf("Done\n");
	return EXIT_SUCCESS;
}