summaryrefslogtreecommitdiffstats
path: root/tests/gb/gprs_ns_test.c
blob: 38c7d1ff73aac7518f348f63576a190fcc900a2c (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
/* test routines for NS connection handling
 * (C) 2013 by sysmocom s.f.m.c. GmbH
 * Author: Jacob Erlbeck <jerlbeck@sysmocom.de>
 */

#undef _GNU_SOURCE
#define _GNU_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/socket.h>

#include <osmocom/core/msgb.h>
#include <osmocom/core/application.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/signal.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/gprs/gprs_msgb.h>
#include <osmocom/gprs/gprs_ns.h>
#include <osmocom/gprs/gprs_bssgp.h>

#define REMOTE_BSS_ADDR 0x01020304
#define REMOTE_SGSN_ADDR 0x05060708

#define SGSN_NSEI 0x0100

static int gprs_process_message(struct gprs_ns_inst *nsi, const char *text,
				struct sockaddr_in *peer, const unsigned char* data,
				size_t data_len);

static void send_ns_reset(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
			  enum ns_cause cause, uint16_t nsvci, uint16_t nsei)
{
	/* GPRS Network Service, PDU type: NS_RESET,
	 */
	unsigned char msg[12] = {
		0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x11, 0x22,
		0x04, 0x82, 0x11, 0x22
	};

	msg[3] = cause;
	msg[6] = nsvci / 256;
	msg[7] = nsvci % 256;
	msg[10] = nsei / 256;
	msg[11] = nsei % 256;

	gprs_process_message(nsi, "RESET", src_addr, msg, sizeof(msg));
}

static void send_ns_reset_ack(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
			      uint16_t nsvci, uint16_t nsei)
{
	/* GPRS Network Service, PDU type: NS_RESET_ACK,
	 */
	unsigned char msg[9] = {
		0x03, 0x01, 0x82, 0x11, 0x22,
		0x04, 0x82, 0x11, 0x22
	};

	msg[3] = nsvci / 256;
	msg[4] = nsvci % 256;
	msg[7] = nsei / 256;
	msg[8] = nsei % 256;

	gprs_process_message(nsi, "RESET_ACK", src_addr, msg, sizeof(msg));
}

static void send_ns_alive(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
	/* GPRS Network Service, PDU type: NS_ALIVE */
	unsigned char msg[1] = {
		0x0a
	};

	gprs_process_message(nsi, "ALIVE", src_addr, msg, sizeof(msg));
}

static void send_ns_alive_ack(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
	/* GPRS Network Service, PDU type: NS_ALIVE_ACK */
	unsigned char msg[1] = {
		0x0b
	};

	gprs_process_message(nsi, "ALIVE_ACK", src_addr, msg, sizeof(msg));
}

static void send_ns_unblock(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
	/* GPRS Network Service, PDU type: NS_UNBLOCK */
	unsigned char msg[1] = {
		0x06
	};

	gprs_process_message(nsi, "UNBLOCK", src_addr, msg, sizeof(msg));
}

static void send_ns_unblock_ack(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
	/* GPRS Network Service, PDU type: NS_UNBLOCK_ACK */
	unsigned char msg[1] = {
		0x07
	};

	gprs_process_message(nsi, "UNBLOCK_ACK", src_addr, msg, sizeof(msg));
}

static void send_ns_unitdata(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
			     uint16_t nsbvci,
			     const unsigned char *bssgp_msg, size_t bssgp_msg_size)
{
	/* GPRS Network Service, PDU type: NS_UNITDATA */
	unsigned char msg[4096] = {
		0x00, 0x00, 0x00, 0x00
	};

	OSMO_ASSERT(bssgp_msg_size <= sizeof(msg) - 4);

	msg[2] = nsbvci / 256;
	msg[3] = nsbvci % 256;
	memcpy(msg + 4, bssgp_msg, bssgp_msg_size);

	gprs_process_message(nsi, "UNITDATA", src_addr, msg, bssgp_msg_size + 4);
}

static void send_bssgp_reset(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
			     uint16_t bvci)
{
	/* GPRS Network Service, PDU type: NS_UNITDATA, BVCI 0
	 * BSSGP RESET */
	unsigned char msg[22] = {
		0x22, 0x04, 0x82, 0x4a,
		0x2e, 0x07, 0x81, 0x08, 0x08, 0x88, 0x10, 0x20,
		0x30, 0x40, 0x50, 0x60, 0x10, 0x00
	};

	msg[3] = bvci / 256;
	msg[4] = bvci % 256;

	send_ns_unitdata(nsi, src_addr, 0, msg, sizeof(msg));
}

static void setup_ns(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
		     uint16_t nsvci, uint16_t nsei)
{
	printf("Setup NS-VC: remote 0x%08x:%d, "
	       "NSVCI 0x%04x(%d), NSEI 0x%04x(%d)\n\n",
	       ntohl(src_addr->sin_addr.s_addr), ntohs(src_addr->sin_port),
	       nsvci, nsvci, nsei, nsei);

	send_ns_reset(nsi, src_addr, NS_CAUSE_OM_INTERVENTION, nsvci, nsei);
	send_ns_alive(nsi, src_addr);
	send_ns_unblock(nsi, src_addr);
	send_ns_alive_ack(nsi, src_addr);
}

static void setup_bssgp(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
			uint16_t bvci) __attribute__((__unused__));

static void setup_bssgp(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
			uint16_t bvci)
{
	printf("Setup BSSGP: remote 0x%08x:%d, "
	       "BVCI 0x%04x(%d)\n\n",
	       ntohl(src_addr->sin_addr.s_addr), ntohs(src_addr->sin_port),
	       bvci, bvci);

	send_bssgp_reset(nsi, src_addr, bvci);
}

/* GPRS Network Service, PDU type: NS_RESET,
 * Cause: O&M intervention, NS VCI: 0x1122, NSEI 0x1122
 */
static const unsigned char gprs_ns_reset[12] = {
	0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x11, 0x22,
	0x04, 0x82, 0x11, 0x22
};

/* GPRS Network Service, PDU type: NS_RESET,
 * Cause: O&M intervention, NS VCI: 0x3344, NSEI 0x1122
 */
static const unsigned char gprs_ns_reset_vci2[12] = {
	0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x33, 0x44,
	0x04, 0x82, 0x11, 0x22
};

/* GPRS Network Service, PDU type: NS_RESET,
 * Cause: O&M intervention, NS VCI: 0x1122, NSEI 0x3344
 */
static const unsigned char gprs_ns_reset_nsei2[12] = {
	0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x11, 0x22,
	0x04, 0x82, 0x33, 0x44
};

/* GPRS Network Service, PDU type: NS_ALIVE */
static const unsigned char gprs_ns_alive[1] = {
	0x0a
};

/* GPRS Network Service, PDU type: NS_STATUS,
 * Cause: PDU not compatible with the protocol state
 * PDU: NS_ALIVE
 */
static const unsigned char gprs_ns_status_invalid_alive[7] = {
	0x08, 0x00, 0x81, 0x0a, 0x02, 0x81, 0x0a
};

/* GPRS Network Service, PDU type: NS_ALIVE_ACK */
static const unsigned char gprs_ns_alive_ack[1] = {
	0x0b
};

/* GPRS Network Service, PDU type: NS_UNBLOCK */
static const unsigned char gprs_ns_unblock[1] = {
	0x06
};


/* GPRS Network Service, PDU type: NS_STATUS,
 * Cause: PDU not compatible with the protocol state
 * PDU: NS_RESET_ACK, NS VCI: 0x1122, NSEI 0x1122
 */
static const unsigned char gprs_ns_status_invalid_reset_ack[15] = {
	0x08, 0x00, 0x81, 0x0a, 0x02, 0x89, 0x03, 0x01,
	0x82, 0x11, 0x22, 0x04, 0x82, 0x11, 0x22
};

/* GPRS Network Service, PDU type: NS_UNITDATA, BVCI 0 */
static const unsigned char gprs_bssgp_reset[22] = {
	0x00, 0x00, 0x00, 0x00, 0x22, 0x04, 0x82, 0x4a,
	0x2e, 0x07, 0x81, 0x08, 0x08, 0x88, 0x10, 0x20,
	0x30, 0x40, 0x50, 0x60, 0x10, 0x00
};

int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg,
		   struct sockaddr_in *saddr, enum gprs_ns_ll ll);

/* override */
int gprs_ns_callback(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
			 struct msgb *msg, uint16_t bvci)
{
	printf("CALLBACK, event %d, msg length %d, bvci 0x%04x\n%s\n\n",
			event, msgb_bssgp_len(msg), bvci,
			osmo_hexdump(msgb_bssgph(msg), msgb_bssgp_len(msg)));
	return 0;
}

/* override */
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);

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

	if (dest_host == REMOTE_BSS_ADDR)
		printf("MESSAGE to BSS, msg length %d\n%s\n\n", len, osmo_hexdump(buf, len));
	else if (dest_host == REMOTE_SGSN_ADDR)
		printf("MESSAGE to SGSN, msg length %d\n%s\n\n", len, osmo_hexdump(buf, len));
	else
		return real_sendto(sockfd, buf, len, flags, dest_addr, addrlen);

	return len;
}

/* override */
int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg)
{
	typedef int (*gprs_ns_sendmsg_t)(struct gprs_ns_inst *nsi, struct msgb *msg);
	static gprs_ns_sendmsg_t real_gprs_ns_sendmsg = NULL;
	uint16_t bvci = msgb_bvci(msg);
	uint16_t nsei = msgb_nsei(msg);

	unsigned char *buf = msg->data;
	size_t len = msg->len;

	if (!real_gprs_ns_sendmsg)
		real_gprs_ns_sendmsg = dlsym(RTLD_NEXT, "gprs_ns_sendmsg");

	if (nsei == SGSN_NSEI)
		printf("NS UNITDATA MESSAGE to SGSN, BVCI 0x%04x, msg length %d\n%s\n\n",
		       bvci, len, osmo_hexdump(buf, len));
	else
		printf("NS UNITDATA MESSAGE to BSS, BVCI 0x%04x, msg length %d\n%s\n\n",
		       bvci, len, osmo_hexdump(buf, len));

	return real_gprs_ns_sendmsg(nsi, msg);
}

static void dump_rate_ctr_group(FILE *stream, const char *prefix,
			    struct rate_ctr_group *ctrg)
{
	unsigned int i;

	for (i = 0; i < ctrg->desc->num_ctr; i++) {
		struct rate_ctr *ctr = &ctrg->ctr[i];
		if (ctr->current && !strchr(ctrg->desc->ctr_desc[i].name, '.'))
			fprintf(stream, " %s%s: %llu%s",
				prefix, ctrg->desc->ctr_desc[i].description,
				(long long)ctr->current,
				"\n");
	};
}

/* Signal handler for signals from NS layer */
static int test_signal(unsigned int subsys, unsigned int signal,
		  void *handler_data, void *signal_data)
{
	struct ns_signal_data *nssd = signal_data;

	if (subsys != SS_L_NS)
		return 0;

	switch (signal) {
	case S_NS_RESET:
		printf("==> got signal NS_RESET, NS-VC 0x%04x/%s\n",
		       nssd->nsvc->nsvci,
		       gprs_ns_ll_str(nssd->nsvc));
		break;

	case S_NS_ALIVE_EXP:
		printf("==> got signal NS_ALIVE_EXP, NS-VC 0x%04x/%s\n",
		       nssd->nsvc->nsvci,
		       gprs_ns_ll_str(nssd->nsvc));
		break;

	case S_NS_BLOCK:
		printf("==> got signal NS_BLOCK, NS-VC 0x%04x/%s\n",
		       nssd->nsvc->nsvci,
		       gprs_ns_ll_str(nssd->nsvc));
		break;

	case S_NS_UNBLOCK:
		printf("==> got signal NS_UNBLOCK, NS-VC 0x%04x/%s\n",
		       nssd->nsvc->nsvci,
		       gprs_ns_ll_str(nssd->nsvc));
		break;

	case S_NS_REPLACED:
		printf("==> got signal NS_REPLACED: 0x%04x/%s",
		       nssd->nsvc->nsvci,
		       gprs_ns_ll_str(nssd->nsvc));
		printf(" -> 0x%04x/%s\n",
		       nssd->old_nsvc->nsvci,
		       gprs_ns_ll_str(nssd->old_nsvc));
		break;

	default:
		printf("==> got signal %d, NS-VC 0x%04x/%s\n", signal,
		       nssd->nsvc->nsvci,
		       gprs_ns_ll_str(nssd->nsvc));
		break;
	}

	return 0;
}

static int gprs_process_message(struct gprs_ns_inst *nsi, const char *text, struct sockaddr_in *peer, const unsigned char* data, size_t data_len)
{
	struct msgb *msg;
	int ret;
	if (data_len > NS_ALLOC_SIZE - NS_ALLOC_HEADROOM) {
		fprintf(stderr, "message too long: %d\n", data_len);
		return -1;
	}

	msg = gprs_ns_msgb_alloc();
	memmove(msg->data, data, data_len);
	msg->l2h = msg->data;
	msgb_put(msg, data_len);

	printf("PROCESSING %s from 0x%08x:%d\n%s\n\n",
	       text, ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port),
	       osmo_hexdump(data, data_len));

	ret = gprs_ns_rcvmsg(nsi, msg, peer, GPRS_NS_LL_UDP);

	printf("result (%s) = %d\n\n", text, ret);

	msgb_free(msg);

	return ret;
}

static int gprs_send_message(struct gprs_ns_inst *nsi, const char *text,
			     uint16_t nsei, uint16_t bvci,
			     const unsigned char* data, size_t data_len)
{
	struct msgb *msg;
	int ret;
	if (data_len > NS_ALLOC_SIZE - NS_ALLOC_HEADROOM) {
		fprintf(stderr, "message too long: %d\n", data_len);
		return -1;
	}

	msg = gprs_ns_msgb_alloc();
	memmove(msg->data, data, data_len);
	msg->l2h = msg->data;
	msgb_put(msg, data_len);

	msgb_nsei(msg) = nsei;
	msgb_bvci(msg) = bvci;

	printf("SENDING %s to NSEI 0x%04x, BVCI 0x%04x\n", text, nsei, bvci);

	ret = gprs_ns_sendmsg(nsi, msg);

	printf("result (%s) = %d\n\n", text, ret);

	return ret;
}

static void gprs_dump_nsi(struct gprs_ns_inst *nsi)
{
	struct gprs_nsvc *nsvc;

	printf("Current NS-VCIs:\n");
	llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
		struct sockaddr_in *peer = &(nsvc->ip.bts_addr);
		printf("    VCI 0x%04x, NSEI 0x%04x, peer 0x%08x:%d%s%s\n",
		       nsvc->nsvci, nsvc->nsei,
		       ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port),
		       nsvc->state & NSE_S_BLOCKED ? ", blocked" : "",
		       nsvc->state & NSE_S_ALIVE   ? "" : ", dead"
		      );
		dump_rate_ctr_group(stdout, "        ", nsvc->ctrg);
	}
	printf("\n");
}

static void test_bss_port_changes()
{
	struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
	struct sockaddr_in peer[4] = {{0},};

	peer[0].sin_family = AF_INET;
	peer[0].sin_port = htons(1111);
	peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
	peer[1].sin_family = AF_INET;
	peer[1].sin_port = htons(2222);
	peer[1].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
	peer[2].sin_family = AF_INET;
	peer[2].sin_port = htons(3333);
	peer[2].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
	peer[3].sin_family = AF_INET;
	peer[3].sin_port = htons(4444);
	peer[3].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);

	printf("--- Setup, send BSSGP RESET ---\n\n");

	setup_ns(nsi, &peer[0], 0x1122, 0x1122);
	gprs_dump_nsi(nsi);
	gprs_process_message(nsi, "BSSGP RESET", &peer[0],
			     gprs_bssgp_reset, sizeof(gprs_bssgp_reset));

	printf("--- Peer port changes, RESET, message remains unchanged ---\n\n");

	send_ns_reset(nsi, &peer[1], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x1122);
	gprs_dump_nsi(nsi);

	printf("--- Peer port changes, RESET, VCI changes ---\n\n");

	send_ns_reset(nsi, &peer[2], NS_CAUSE_OM_INTERVENTION, 0x3344, 0x1122);
	gprs_dump_nsi(nsi);

	printf("--- Peer port changes, RESET, NSEI changes ---\n\n");

	send_ns_reset(nsi, &peer[3], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x3344);
	gprs_dump_nsi(nsi);

	printf("--- Peer port 3333, RESET, VCI is changed back ---\n\n");

	send_ns_reset(nsi, &peer[2], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x1122);
	gprs_dump_nsi(nsi);

	printf("--- Peer port 4444, RESET, NSEI is changed back ---\n\n");

	send_ns_reset(nsi, &peer[3], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x1122);
	gprs_dump_nsi(nsi);

	gprs_ns_destroy(nsi);
	nsi = NULL;
}


static void test_sgsn_output()
{
	struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
	struct sockaddr_in sgsn_peer= {0};

	sgsn_peer.sin_family = AF_INET;
	sgsn_peer.sin_port = htons(32000);
	sgsn_peer.sin_addr.s_addr = htonl(REMOTE_SGSN_ADDR);

	gprs_dump_nsi(nsi);

	printf("--- Send message to SGSN ---\n\n");

	gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
			     gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);

	printf("--- Setup dead connection to SGSN ---\n\n");

	gprs_ns_nsip_connect(nsi, &sgsn_peer, SGSN_NSEI, SGSN_NSEI+1);
	gprs_dump_nsi(nsi);

	printf("--- Send message to SGSN ---\n\n");

	gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
			     gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);

	printf("--- Make connection to SGSN alive ---\n\n");

	send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
	send_ns_alive_ack(nsi, &sgsn_peer);
	gprs_dump_nsi(nsi);

	printf("--- Send message to SGSN ---\n\n");

	gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
			     gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);

	printf("--- Unblock connection to SGSN ---\n\n");

	send_ns_unblock_ack(nsi, &sgsn_peer);
	send_ns_alive(nsi, &sgsn_peer);
	gprs_dump_nsi(nsi);

	printf("--- Send message to SGSN ---\n\n");

	gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
			     gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);

	printf("--- Send empty message with BVCI to SGSN ---\n\n");

	gprs_send_message(nsi, "[empty]", SGSN_NSEI, 0x0102,
			     gprs_bssgp_reset, 0);


	gprs_ns_destroy(nsi);
	nsi = NULL;
}


int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
{
	return -1;
}

static struct log_info info = {};

int main(int argc, char **argv)
{
	osmo_init_logging(&info);
	log_set_use_color(osmo_stderr_target, 0);
	log_set_print_filename(osmo_stderr_target, 0);
	osmo_signal_register_handler(SS_L_NS, &test_signal, NULL);

	printf("===== NS protocol test START\n");
	test_bss_port_changes();
	test_sgsn_output();
	printf("===== NS protocol test END\n\n");

	exit(EXIT_SUCCESS);
}