summaryrefslogtreecommitdiffstats
path: root/src/gb/gprs_ns_vty.c
blob: 9cffb71d9a86cd4a84a2318cb9d1f6de944a9526 (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
/*! \file gprs_ns_vty.c
 * VTY interface for our GPRS Networks Service (NS) implementation. */
/*
 * (C) 2009-2014 by Harald Welte <laforge@gnumonks.org>
 * (C) 2016-2017 by sysmocom - s.f.m.c. GmbH
 *
 * All Rights Reserved
 *
 * SPDX-License-Identifier: GPL-2.0+
 *
 * 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <stdint.h>

#include <arpa/inet.h>

#include <osmocom/core/msgb.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/select.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/gprs/gprs_ns.h>
#include <osmocom/gprs/gprs_bssgp.h>
#include <osmocom/core/socket.h>
#include <osmocom/vty/vty.h>
#include <osmocom/vty/command.h>
#include <osmocom/vty/logging.h>
#include <osmocom/vty/telnet_interface.h>
#include <osmocom/vty/misc.h>

#include "common_vty.h"
#include "gb_internal.h"

static struct gprs_ns_inst *vty_nsi = NULL;

/* FIXME: this should go to some common file as it is copied
 * in vty_interface.c of the BSC */
static const struct value_string gprs_ns_timer_strs[] = {
	{ 0, "tns-block" },
	{ 1, "tns-block-retries" },
	{ 2, "tns-reset" },
	{ 3, "tns-reset-retries" },
	{ 4, "tns-test" },
	{ 5, "tns-alive" },
	{ 6, "tns-alive-retries" },
	{ 7, "tsns-prov" },
	{ 0, NULL }
};

static void log_set_nsvc_filter(struct log_target *target,
				struct gprs_nsvc *nsvc)
{
	if (nsvc) {
		target->filter_map |= (1 << LOG_FLT_GB_NSVC);
		target->filter_data[LOG_FLT_GB_NSVC] = nsvc;
	} else if (target->filter_data[LOG_FLT_GB_NSVC]) {
		target->filter_map = ~(1 << LOG_FLT_GB_NSVC);
		target->filter_data[LOG_FLT_GB_NSVC] = NULL;
	}
}

static struct cmd_node ns_node = {
	L_NS_NODE,
	"%s(config-ns)# ",
	1,
};

static int config_write_ns(struct vty *vty)
{
	struct gprs_nsvc *nsvc;
	unsigned int i;
	struct in_addr ia;

	vty_out(vty, "ns%s", VTY_NEWLINE);

	llist_for_each_entry(nsvc, &vty_nsi->gprs_nsvcs, list) {
		if (!nsvc->persistent)
			continue;
		vty_out(vty, " nse %u nsvci %u%s",
			nsvc->nsei, nsvc->nsvci, VTY_NEWLINE);
		vty_out(vty, " nse %u remote-role %s%s",
			nsvc->nsei, nsvc->remote_end_is_sgsn ? "sgsn" : "bss",
			VTY_NEWLINE);
		switch (nsvc->ll) {
		case GPRS_NS_LL_UDP:
			vty_out(vty, " nse %u encapsulation udp%s", nsvc->nsei,
				VTY_NEWLINE);
			vty_out(vty, " nse %u remote-ip %s%s",
				nsvc->nsei,
				inet_ntoa(nsvc->ip.bts_addr.sin_addr),
				VTY_NEWLINE);
			vty_out(vty, " nse %u remote-port %u%s",
				nsvc->nsei, osmo_ntohs(nsvc->ip.bts_addr.sin_port),
				VTY_NEWLINE);
			break;
		case GPRS_NS_LL_FR_GRE:
			vty_out(vty, " nse %u encapsulation framerelay-gre%s",
				nsvc->nsei, VTY_NEWLINE);
			vty_out(vty, " nse %u remote-ip %s%s",
				nsvc->nsei,
				inet_ntoa(nsvc->frgre.bts_addr.sin_addr),
				VTY_NEWLINE);
			vty_out(vty, " nse %u fr-dlci %u%s",
				nsvc->nsei, osmo_ntohs(nsvc->frgre.bts_addr.sin_port),
				VTY_NEWLINE);
		default:
			break;
		}
	}

	for (i = 0; i < ARRAY_SIZE(vty_nsi->timeout); i++)
		vty_out(vty, " timer %s %u%s",
			get_value_string(gprs_ns_timer_strs, i),
			vty_nsi->timeout[i], VTY_NEWLINE);

	if (vty_nsi->nsip.local_ip) {
		ia.s_addr = osmo_htonl(vty_nsi->nsip.local_ip);
		vty_out(vty, " encapsulation udp local-ip %s%s",
			inet_ntoa(ia), VTY_NEWLINE);
	}
	if (vty_nsi->nsip.local_port)
		vty_out(vty, " encapsulation udp local-port %u%s",
			vty_nsi->nsip.local_port, VTY_NEWLINE);
	if (vty_nsi->nsip.dscp)
		vty_out(vty, " encapsulation udp dscp %d%s",
			vty_nsi->nsip.dscp, VTY_NEWLINE);

	vty_out(vty, " encapsulation framerelay-gre enabled %u%s",
		vty_nsi->frgre.enabled ? 1 : 0, VTY_NEWLINE);
	if (vty_nsi->frgre.local_ip) {
		ia.s_addr = osmo_htonl(vty_nsi->frgre.local_ip);
		vty_out(vty, " encapsulation framerelay-gre local-ip %s%s",
			inet_ntoa(ia), VTY_NEWLINE);
	}

	return CMD_SUCCESS;
}

DEFUN(cfg_ns, cfg_ns_cmd,
      "ns",
      "Configure the GPRS Network Service")
{
	vty->node = L_NS_NODE;
	return CMD_SUCCESS;
}

static void dump_nse(struct vty *vty, const struct gprs_nsvc *nsvc, bool stats, bool persistent_only)
{
	if (persistent_only)
		if (!nsvc->persistent)
			return;

	vty_out(vty, "NSEI %5u, NS-VC %5u, %5s %9s, ",
		nsvc->nsei, nsvc->nsvci,
		NS_DESC_A(nsvc->state),
		NS_DESC_B(nsvc->state));

	if (nsvc->ll == GPRS_NS_LL_UDP) {
		char local[INET6_ADDRSTRLEN + 1];
		int rc = osmo_sock_local_ip((char *)&local, inet_ntoa(nsvc->ip.bts_addr.sin_addr));
		vty_out(vty, "%s:%u ", (rc < 0) ? "unknown" : local, nsvc->nsi->nsip.local_port);
	}

	vty_out(vty, "Remote: %-4s, %5s %9s, %s ",
		nsvc->remote_end_is_sgsn ? "SGSN" : "BSS",
		NS_DESC_A(nsvc->remote_state),
		NS_DESC_B(nsvc->remote_state), gprs_ns_ll_str(nsvc));

	vty_out(vty, "%s%s", nsvc->ll == GPRS_NS_LL_UDP ? "UDP" : "FR-GRE", VTY_NEWLINE);

	if (stats) {
		vty_out_rate_ctr_group(vty, " ", nsvc->ctrg);
		vty_out_stat_item_group(vty, " ", nsvc->statg);
	}
}

static void dump_ns(struct vty *vty, const struct gprs_ns_inst *nsi, bool stats, bool persistent_only)
{
	struct gprs_nsvc *nsvc;
	struct in_addr ia;

	ia.s_addr = osmo_htonl(vty_nsi->nsip.local_ip);
	vty_out(vty, "Encapsulation NS-UDP-IP     Local IP: %s, UDP Port: %u%s",
		inet_ntoa(ia), vty_nsi->nsip.local_port, VTY_NEWLINE);

	if (nsi->frgre.enabled) {
		ia.s_addr = osmo_htonl(vty_nsi->frgre.local_ip);
		vty_out(vty, "Encapsulation NS-FR-GRE-IP  Local IP: %s%s", inet_ntoa(ia), VTY_NEWLINE);
	}

	llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
		if (nsvc == nsi->unknown_nsvc)
			continue;
		dump_nse(vty, nsvc, stats, persistent_only);
	}

	gprs_sns_dump_vty(vty, nsi, stats);
}

DEFUN(show_ns, show_ns_cmd, "show ns",
	SHOW_STR "Display information about the NS protocol")
{
	struct gprs_ns_inst *nsi = vty_nsi;
	dump_ns(vty, nsi, false, false);
	return CMD_SUCCESS;
}

DEFUN(show_ns_stats, show_ns_stats_cmd, "show ns stats",
	SHOW_STR
	"Display information about the NS protocol\n"
	"Include statistics\n")
{
	struct gprs_ns_inst *nsi = vty_nsi;
	dump_ns(vty, nsi, true, false);
	return CMD_SUCCESS;
}

DEFUN(show_ns_pers, show_ns_pers_cmd, "show ns persistent",
	SHOW_STR
	"Display information about the NS protocol\n"
	"Show only persistent NS\n")
{
	struct gprs_ns_inst *nsi = vty_nsi;
	dump_ns(vty, nsi, true, true);
	return CMD_SUCCESS;
}

DEFUN(show_nse, show_nse_cmd, "show ns (nsei|nsvc) <0-65535> [stats]",
	SHOW_STR "Display information about the NS protocol\n"
	"Select one NSE by its NSE Identifier\n"
	"Select one NSE by its NS-VC Identifier\n"
	"The Identifier of selected type\n"
	"Include Statistics\n")
{
	struct gprs_ns_inst *nsi = vty_nsi;
	struct gprs_nsvc *nsvc;
	uint16_t id = atoi(argv[1]);
	bool show_stats = false;

	if (!strcmp(argv[0], "nsei"))
		nsvc = gprs_nsvc_by_nsei(nsi, id);
	else
		nsvc = gprs_nsvc_by_nsvci(nsi, id);

	if (!nsvc) {
		vty_out(vty, "No such NS Entity%s", VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (argc >= 3)
		show_stats = true;

	dump_nse(vty, nsvc, show_stats, false);
	return CMD_SUCCESS;
}

#define NSE_CMD_STR "Persistent NS Entity\n" "NS Entity ID (NSEI)\n"

DEFUN(cfg_nse_nsvc, cfg_nse_nsvci_cmd,
	"nse <0-65535> nsvci <0-65534>",
	NSE_CMD_STR
	"NS Virtual Connection\n"
	"NS Virtual Connection ID (NSVCI)\n"
	)
{
	uint16_t nsei = atoi(argv[0]);
	uint16_t nsvci = atoi(argv[1]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		nsvc = gprs_nsvc_create(vty_nsi, nsvci);
		nsvc->nsei = nsei;
	}
	nsvc->nsvci = nsvci;
	/* All NSVCs that are explicitly configured by VTY are
	 * marked as persistent so we can write them to the config
	 * file at some later point */
	nsvc->persistent = 1;

	return CMD_SUCCESS;
}

DEFUN(cfg_nse_remoteip, cfg_nse_remoteip_cmd,
	"nse <0-65535> remote-ip A.B.C.D",
	NSE_CMD_STR
	"Remote IP Address\n"
	"Remote IP Address\n")
{
	uint16_t nsei = atoi(argv[0]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}
	inet_aton(argv[1], &nsvc->ip.bts_addr.sin_addr);

	return CMD_SUCCESS;

}

DEFUN(cfg_nse_remoteport, cfg_nse_remoteport_cmd,
	"nse <0-65535> remote-port <0-65535>",
	NSE_CMD_STR
	"Remote UDP Port\n"
	"Remote UDP Port Number\n")
{
	uint16_t nsei = atoi(argv[0]);
	uint16_t port = atoi(argv[1]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (nsvc->ll != GPRS_NS_LL_UDP) {
		vty_out(vty, "Cannot set UDP Port on non-UDP NSE%s",
			VTY_NEWLINE);
		return CMD_WARNING;
	}

	nsvc->ip.bts_addr.sin_port = osmo_htons(port);

	return CMD_SUCCESS;
}

DEFUN(cfg_nse_fr_dlci, cfg_nse_fr_dlci_cmd,
	"nse <0-65535> fr-dlci <16-1007>",
	NSE_CMD_STR
	"Frame Relay DLCI\n"
	"Frame Relay DLCI Number\n")
{
	uint16_t nsei = atoi(argv[0]);
	uint16_t dlci = atoi(argv[1]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (nsvc->ll != GPRS_NS_LL_FR_GRE) {
		vty_out(vty, "Cannot set FR DLCI on non-FR NSE%s",
			VTY_NEWLINE);
		return CMD_WARNING;
	}

	nsvc->frgre.bts_addr.sin_port = osmo_htons(dlci);

	return CMD_SUCCESS;
}

DEFUN(cfg_nse_encaps, cfg_nse_encaps_cmd,
	"nse <0-65535> encapsulation (udp|framerelay-gre)",
	NSE_CMD_STR
	"Encapsulation for NS\n"
	"UDP/IP Encapsulation\n" "Frame-Relay/GRE/IP Encapsulation\n")
{
	uint16_t nsei = atoi(argv[0]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!strcmp(argv[1], "udp"))
		nsvc->ll = GPRS_NS_LL_UDP;
	else
		nsvc->ll = GPRS_NS_LL_FR_GRE;

	return CMD_SUCCESS;
}


DEFUN(cfg_nse_remoterole, cfg_nse_remoterole_cmd,
	"nse <0-65535> remote-role (sgsn|bss)",
	NSE_CMD_STR
	"Remote NSE Role\n"
	"Remote Peer is SGSN\n"
	"Remote Peer is BSS\n")
{
	uint16_t nsei = atoi(argv[0]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!strcmp(argv[1], "sgsn"))
		nsvc->remote_end_is_sgsn = 1;
	else
		nsvc->remote_end_is_sgsn = 0;

	return CMD_SUCCESS;
}

DEFUN(cfg_no_nse, cfg_no_nse_cmd,
	"no nse <0-65535>",
	"Delete Persistent NS Entity\n"
	"Delete " NSE_CMD_STR)
{
	uint16_t nsei = atoi(argv[0]);
	struct gprs_nsvc *nsvc;

	nsvc = gprs_nsvc_by_nsei(vty_nsi, nsei);
	if (!nsvc) {
		vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!nsvc->persistent) {
		vty_out(vty, "NSEI %u is not a persistent NSE%s",
			nsei, VTY_NEWLINE);
		return CMD_WARNING;
	}

	nsvc->persistent = 0;

	return CMD_SUCCESS;
}

DEFUN(cfg_ns_timer, cfg_ns_timer_cmd,
	"timer " NS_TIMERS " <0-65535>",
	"Network Service Timer\n"
	NS_TIMERS_HELP "Timer Value\n")
{
	int idx = get_string_value(gprs_ns_timer_strs, argv[0]);
	int val = atoi(argv[1]);

	if (idx < 0 || idx >= ARRAY_SIZE(vty_nsi->timeout))
		return CMD_WARNING;

	vty_nsi->timeout[idx] = val;

	return CMD_SUCCESS;
}

#define ENCAPS_STR "NS encapsulation options\n"

DEFUN(cfg_nsip_local_ip, cfg_nsip_local_ip_cmd,
      "encapsulation udp local-ip A.B.C.D",
	ENCAPS_STR "NS over UDP Encapsulation\n"
	"Set the IP address on which we listen for NS/UDP\n"
	"IP Address\n")
{
	struct in_addr ia;

	inet_aton(argv[0], &ia);
	vty_nsi->nsip.local_ip = osmo_ntohl(ia.s_addr);

	return CMD_SUCCESS;
}

DEFUN(cfg_nsip_local_port, cfg_nsip_local_port_cmd,
      "encapsulation udp local-port <0-65535>",
	ENCAPS_STR "NS over UDP Encapsulation\n"
	"Set the UDP port on which we listen for NS/UDP\n"
	"UDP port number\n")
{
	unsigned int port = atoi(argv[0]);

	vty_nsi->nsip.local_port = port;

	return CMD_SUCCESS;
}

DEFUN(cfg_nsip_dscp, cfg_nsip_dscp_cmd,
      "encapsulation udp dscp <0-255>",
	ENCAPS_STR "NS over UDP Encapsulation\n"
	"Set DSCP/TOS on the UDP socket\n" "DSCP Value\n")
{
	int dscp = atoi(argv[0]);
	vty_nsi->nsip.dscp = dscp;
	return CMD_SUCCESS;
}

DEFUN(cfg_frgre_local_ip, cfg_frgre_local_ip_cmd,
      "encapsulation framerelay-gre local-ip A.B.C.D",
	ENCAPS_STR "NS over Frame Relay over GRE Encapsulation\n"
	"Set the IP address on which we listen for NS/FR/GRE\n"
	"IP Address\n")
{
	struct in_addr ia;

	inet_aton(argv[0], &ia);
	vty_nsi->frgre.local_ip = osmo_ntohl(ia.s_addr);

	return CMD_SUCCESS;
}

DEFUN(cfg_frgre_enable, cfg_frgre_enable_cmd,
      "encapsulation framerelay-gre enabled (1|0)",
	ENCAPS_STR "NS over Frame Relay over GRE Encapsulation\n"
	"Enable or disable Frame Relay over GRE\n"
	"Enable\n" "Disable\n")
{
	int enabled = atoi(argv[0]);

	vty_nsi->frgre.enabled = enabled;

	return CMD_SUCCESS;
}

DEFUN(nsvc_nsei, nsvc_nsei_cmd,
	"nsvc (nsei|nsvci) <0-65535> (block|unblock|reset)",
	"Perform an operation on a NSVC\n"
	"NSEI to identify NS-VC Identifier (NS-VCI)\n"
	"NS-VC Identifier (NS-VCI)\n"
	"The NSEI\n"
	"Initiate BLOCK procedure\n"
	"Initiate UNBLOCK procedure\n"
	"Initiate RESET procedure\n")
{
	const char *id_type = argv[0];
	uint16_t id = atoi(argv[1]);
	const char *operation = argv[2];
	struct gprs_nsvc *nsvc;

	if (!strcmp(id_type, "nsei"))
		nsvc = gprs_nsvc_by_nsei(vty_nsi, id);
	else if (!strcmp(id_type, "nsvci"))
		nsvc = gprs_nsvc_by_nsvci(vty_nsi, id);
	else {
		vty_out(vty, "%%No such id_type '%s'%s", id_type, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!nsvc) {
		vty_out(vty, "No such %s (%u)%s", id_type, id, VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (nsvc->nsi->bss_sns_fi) {
		vty_out(vty, "A NS Instance using the IP Sub-Network doesn't use BLOCK/UNBLOCK/RESET%s",
			VTY_NEWLINE);
		return CMD_WARNING;
	}

	if (!strcmp(operation, "block"))
		gprs_ns_tx_block(nsvc, NS_CAUSE_OM_INTERVENTION);
	else if (!strcmp(operation, "unblock"))
		gprs_ns_tx_unblock(nsvc);
	else if (!strcmp(operation, "reset"))
		gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
	else
		return CMD_WARNING;

	return CMD_SUCCESS;
}

DEFUN(logging_fltr_nsvc,
      logging_fltr_nsvc_cmd,
      "logging filter nsvc (nsei|nsvci) <0-65535>",
	LOGGING_STR FILTER_STR
	"Filter based on NS Virtual Connection\n"
	"Identify NS-VC by NSEI\n"
	"Identify NS-VC by NSVCI\n"
	"Numeric identifier\n")
{
	struct log_target *tgt;
	struct gprs_nsvc *nsvc;
	uint16_t id = atoi(argv[1]);

	log_tgt_mutex_lock();
	tgt = osmo_log_vty2tgt(vty);
	if (!tgt) {
		log_tgt_mutex_unlock();
		return CMD_WARNING;
	}

	if (!strcmp(argv[0], "nsei"))
		nsvc = gprs_nsvc_by_nsei(vty_nsi, id);
	else
		nsvc = gprs_nsvc_by_nsvci(vty_nsi, id);

	if (!nsvc) {
		vty_out(vty, "No NS-VC by that identifier%s", VTY_NEWLINE);
		log_tgt_mutex_unlock();
		return CMD_WARNING;
	}

	log_set_nsvc_filter(tgt, nsvc);
	log_tgt_mutex_unlock();
	return CMD_SUCCESS;
}

int gprs_ns_vty_init(struct gprs_ns_inst *nsi)
{
	static bool vty_elements_installed = false;

	vty_nsi = nsi;

	/* Regression test code may call this function repeatedly, so make sure
	 * that VTY elements are not duplicated, which would assert. */
	if (vty_elements_installed)
		return 0;
	vty_elements_installed = true;

	install_element_ve(&show_ns_cmd);
	install_element_ve(&show_ns_stats_cmd);
	install_element_ve(&show_ns_pers_cmd);
	install_element_ve(&show_nse_cmd);
	install_element_ve(&logging_fltr_nsvc_cmd);

	install_element(CFG_LOG_NODE, &logging_fltr_nsvc_cmd);

	install_element(CONFIG_NODE, &cfg_ns_cmd);
	install_node(&ns_node, config_write_ns);
	install_element(L_NS_NODE, &cfg_nse_nsvci_cmd);
	install_element(L_NS_NODE, &cfg_nse_remoteip_cmd);
	install_element(L_NS_NODE, &cfg_nse_remoteport_cmd);
	install_element(L_NS_NODE, &cfg_nse_fr_dlci_cmd);
	install_element(L_NS_NODE, &cfg_nse_encaps_cmd);
	install_element(L_NS_NODE, &cfg_nse_remoterole_cmd);
	install_element(L_NS_NODE, &cfg_no_nse_cmd);
	install_element(L_NS_NODE, &cfg_ns_timer_cmd);
	install_element(L_NS_NODE, &cfg_nsip_local_ip_cmd);
	install_element(L_NS_NODE, &cfg_nsip_local_port_cmd);
	install_element(L_NS_NODE, &cfg_nsip_dscp_cmd);
	install_element(L_NS_NODE, &cfg_frgre_enable_cmd);
	install_element(L_NS_NODE, &cfg_frgre_local_ip_cmd);

	install_element(ENABLE_NODE, &nsvc_nsei_cmd);

	return 0;
}