summaryrefslogtreecommitdiffstats
path: root/src/gsm/gsm0411_smc.c
blob: ff68c089688f2a362db47b84ba60b2ee4bdaaea7 (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
/* Point-to-Point (PP) Short Message Service (SMS)
 * Support on Mobile Radio Interface
 * 3GPP TS 04.11 version 7.1.0 Release 1998 / ETSI TS 100 942 V7.1.0 */

/* (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
 * (C) 2009 by Harald Welte <laforge@gnumonks.org>
 * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
 * (C) 2010 by On-Waves
 * (C) 2011 by Andreas Eversberg <jolly@eversberg.eu>
 *
 * 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/>.
 *
 */

/* Notes on msg:
 *
 * Messages from lower layer are freed by lower layer.
 *
 * Messages to upper layer are freed after upper layer call returns, so upper
 * layer cannot use data after returning. Upper layer must not free the msg.
 *
 * This implies: Lower layer messages can be forwarded to upper layer.
 *
 * Upper layer messages are freed by lower layer, so they must not be freed
 * after calling lower layer.
 *
 *
 * Notes on release:
 *
 * Whenever the process returns to IDLE, the MM connection is released using
 * MMSMS-REL-REQ. It is allowed to destroy this process while processing
 * this message.
 *
 * There is an exception, if MMSMS-REL-IND is received from lower layer, the
 * process returns to IDLE without sending MMSMS-REL-REQ.
 *
 */

#include <string.h>
#include <inttypes.h>
#include <errno.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/timer.h>

#include <osmocom/gsm/gsm0411_utils.h>
#include <osmocom/gsm/gsm0411_smc.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>

static void cp_timer_expired(void *data);

#define MAX_SMS_RETRY 2

#define SMC_LOG_STR "SMC(%" PRIu64 ") "

/* init a new instance */
void gsm411_smc_init(struct gsm411_smc_inst *inst, uint64_t id, int network,
	int (*mn_recv) (struct gsm411_smc_inst *inst, int msg_type,
			struct msgb *msg),
	int (*mm_send) (struct gsm411_smc_inst *inst, int msg_type,
			struct msgb *msg, int cp_msg_type))
{
	memset(inst, 0, sizeof(*inst));
	inst->id = id;
	inst->network = network;
	inst->cp_max_retr = MAX_SMS_RETRY;
	inst->cp_tc1 = GSM411_TMR_TC1A_SEC / (inst->cp_max_retr + 1);
	inst->cp_state = GSM411_CPS_IDLE;
	inst->mn_recv = mn_recv;
	inst->mm_send = mm_send;

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "instance created\n", inst->id);
}

/* clear instance */
void gsm411_smc_clear(struct gsm411_smc_inst *inst)
{
	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "clearing instance\n", inst->id);

	osmo_timer_del(&inst->cp_timer);

	/* free stored msg */
	if (inst->cp_msg) {
		LOGP(DLSMS, LOGL_INFO,
			SMC_LOG_STR "dropping pending message\n", inst->id);
		msgb_free(inst->cp_msg);
		inst->cp_msg = NULL;
	}
}

const char *smc_state_names[] = {
	"IDLE",
	"MM_CONN_PENDING",
	"WAIT_CP_ACK",
	"MM_ESTABLISHED",
};

const struct value_string gsm411_cp_cause_strs[] = {
	{ GSM411_CP_CAUSE_NET_FAIL,	"Network Failure" },
	{ GSM411_CP_CAUSE_CONGESTION,	"Congestion" },
	{ GSM411_CP_CAUSE_INV_TRANS_ID,	"Invalid Transaction ID" },
	{ GSM411_CP_CAUSE_SEMANT_INC_MSG, "Semantically Incorrect Message" },
	{ GSM411_CP_CAUSE_INV_MAND_INF,	"Invalid Mandatory Information" },
	{ GSM411_CP_CAUSE_MSGTYPE_NOTEXIST, "Message Type doesn't exist" },
	{ GSM411_CP_CAUSE_MSG_INCOMP_STATE,
				"Message incompatible with protocol state" },
	{ GSM411_CP_CAUSE_IE_NOTEXIST,	"IE does not exist" },
	{ GSM411_CP_CAUSE_PROTOCOL_ERR,	"Protocol Error" },
	{ 0, 0 }
};

static void new_cp_state(struct gsm411_smc_inst *inst,
	enum gsm411_cp_state state)
{
	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "new CP state %s -> %s\n", inst->id,
		smc_state_names[inst->cp_state], smc_state_names[state]);
	inst->cp_state = state;
}

static int gsm411_tx_cp_error(struct gsm411_smc_inst *inst, uint8_t cause)
{
	struct msgb *nmsg = gsm411_msgb_alloc();
	uint8_t *causep;

	LOGP(DLSMS, LOGL_NOTICE,
		SMC_LOG_STR "TX CP-ERROR, cause %d (%s)\n", inst->id, cause,
		get_value_string(gsm411_cp_cause_strs, cause));

	causep = msgb_put(nmsg, 1);
	*causep = cause;

	return inst->mm_send(inst, GSM411_MMSMS_DATA_REQ, nmsg,
		GSM411_MT_CP_ERROR);
}

/* establish SMC connection */
static int gsm411_mnsms_est_req(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	struct msgb *nmsg;

	if (inst->cp_msg) {
		LOGP(DLSMS, LOGL_FATAL,
			SMC_LOG_STR "EST REQ, but we already have an "
			"cp_msg. This should never happen, please fix!\n",
			inst->id);
		msgb_free(inst->cp_msg);
	}

	inst->cp_msg = msg;
	new_cp_state(inst, GSM411_CPS_MM_CONN_PENDING);
	/* clear stored release flag */
	inst->cp_rel = 0;
	/* send MMSMS_EST_REQ */
	nmsg = gsm411_msgb_alloc();
	return inst->mm_send(inst, GSM411_MMSMS_EST_REQ, nmsg, 0);
}

static int gsm411_mmsms_send_msg(struct gsm411_smc_inst *inst)
{
	struct msgb *nmsg;

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "send CP data\n", inst->id);
	/* reset retry counter */
	if (inst->cp_state != GSM411_CPS_WAIT_CP_ACK)
		inst->cp_retx = 0;
	/* 5.2.3.1.2: enter MO-wait for CP-ACK */
	/* 5.2.3.2.3: enter MT-wait for CP-ACK */
	new_cp_state(inst, GSM411_CPS_WAIT_CP_ACK);
	inst->cp_timer.data = inst;
	inst->cp_timer.cb = cp_timer_expired;
	/* 5.3.2.1: Set Timer TC1A */
	osmo_timer_schedule(&inst->cp_timer, inst->cp_tc1, 0);
	/* clone cp_msg */
	nmsg = gsm411_msgb_alloc();
	memcpy(msgb_put(nmsg, inst->cp_msg->len), inst->cp_msg->data,
		inst->cp_msg->len);
	/* send MMSMS_DATA_REQ with CP-DATA */
	return inst->mm_send(inst, GSM411_MMSMS_DATA_REQ, nmsg,
				GSM411_MT_CP_DATA);
}

static int gsm411_mmsms_est_cnf(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	if (!inst->cp_msg) {
		LOGP(DLSMS, LOGL_FATAL,
			SMC_LOG_STR "EST CNF, but we have no cp_msg. This "
			"should never happen, please fix!\n",
			inst->id);
		return -EINVAL;
	}

	return gsm411_mmsms_send_msg(inst);
}

/* SMC TC1* is expired */
static void cp_timer_expired(void *data)
{
	struct gsm411_smc_inst *inst = data;
	struct msgb *nmsg;

	if (inst->cp_retx == inst->cp_max_retr) {

		LOGP(DLSMS, LOGL_INFO,
			SMC_LOG_STR "TC1* timeout, no more retries.\n",
			inst->id);
		/* 5.3.2.1: enter idle state */
		new_cp_state(inst, GSM411_CPS_IDLE);
		/* indicate error */
		nmsg = gsm411_msgb_alloc();
		inst->mn_recv(inst, GSM411_MNSMS_ERROR_IND, nmsg);
		msgb_free(nmsg);
		/* free pending stored msg */
		if (inst->cp_msg) {
			msgb_free(inst->cp_msg);
			inst->cp_msg = NULL;
		}
		/* release MM connection */
		nmsg = gsm411_msgb_alloc();
		inst->mm_send(inst, GSM411_MMSMS_REL_REQ, nmsg, 0);
		return;
	}

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "TC1* timeout, retrying...\n", inst->id);
	inst->cp_retx++;
	gsm411_mmsms_est_cnf(inst, NULL);
}

static int gsm411_mmsms_cp_ack(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	/* free stored msg */
	if (inst->cp_msg) {
		msgb_free(inst->cp_msg);
		inst->cp_msg = NULL;
	}

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "received CP-ACK\n", inst->id);
	/* 5.3.2.1 enter MM Connection established */
	new_cp_state(inst, GSM411_CPS_MM_ESTABLISHED);
	/* 5.3.2.1: Reset Timer TC1* */
	osmo_timer_del(&inst->cp_timer);

	/* pending release? */
	if (inst->cp_rel) {
		struct msgb *nmsg;

		LOGP(DLSMS, LOGL_INFO,
			SMC_LOG_STR "we have pending release.\n",
			inst->id);
		new_cp_state(inst, GSM411_CPS_IDLE);
		/* release MM connection */
		nmsg = gsm411_msgb_alloc();
		return inst->mm_send(inst, GSM411_MMSMS_REL_REQ, nmsg, 0);
	}

	return 0;
}

static int gsm411_mmsms_cp_data(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	struct msgb *nmsg;
	int mt = GSM411_MNSMS_DATA_IND;

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "received CP-DATA\n", inst->id);
	/* 5.3.1 enter MM Connection established (if idle) */
	if (inst->cp_state == GSM411_CPS_IDLE) {
		new_cp_state(inst, GSM411_CPS_MM_ESTABLISHED);
		mt = GSM411_MNSMS_EST_IND;
		/* clear stored release flag */
		inst->cp_rel = 0;
	}
	/* send MMSMS_DATA_REQ (CP ACK) */
	nmsg = gsm411_msgb_alloc();
	inst->mm_send(inst, GSM411_MMSMS_DATA_REQ, nmsg, GSM411_MT_CP_ACK);
	/* indicate data */
	inst->mn_recv(inst, mt, msg);

	return 0;
}

/* send CP DATA */
static int gsm411_mnsms_data_req(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	if (inst->cp_msg) {
		LOGP(DLSMS, LOGL_FATAL,
			SMC_LOG_STR "DATA REQ, but we already have an "
			"cp_msg. This should never happen, please fix!\n",
			inst->id);
		msgb_free(inst->cp_msg);
	}

	/* store and send */
	inst->cp_msg = msg;
	return gsm411_mmsms_send_msg(inst);
}

/* release SMC connection */
static int gsm411_mnsms_rel_req(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	struct msgb *nmsg;

	msgb_free(msg);

	/* discard silently */
	if (inst->cp_state == GSM411_CPS_IDLE)
		return 0;

	/* store release, until established or released */
	if (inst->cp_state != GSM411_CPS_MM_ESTABLISHED) {
		LOGP(DLSMS, LOGL_NOTICE,
			SMC_LOG_STR "cannot release yet current state: %s\n",
			inst->id, smc_state_names[inst->cp_state]);
		inst->cp_rel = 1;
		return 0;
	}

	/* free stored msg */
	if (inst->cp_msg) {
		msgb_free(inst->cp_msg);
		inst->cp_msg = NULL;
	}

	new_cp_state(inst, GSM411_CPS_IDLE);
	/* release MM connection */
	nmsg = gsm411_msgb_alloc();
	return inst->mm_send(inst, GSM411_MMSMS_REL_REQ, nmsg, 0);
}

static int gsm411_mmsms_cp_error(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	struct msgb *nmsg;

	/* free stored msg */
	if (inst->cp_msg) {
		msgb_free(inst->cp_msg);
		inst->cp_msg = NULL;
	}

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "received CP-ERROR\n", inst->id);
	/* 5.3.4 enter idle */
	new_cp_state(inst, GSM411_CPS_IDLE);
	/* indicate error */
	inst->mn_recv(inst, GSM411_MNSMS_ERROR_IND, msg);
	/* release MM connection */
	nmsg = gsm411_msgb_alloc();
	return inst->mm_send(inst, GSM411_MMSMS_REL_REQ, nmsg, 0);
}

static int gsm411_mmsms_rel_ind(struct gsm411_smc_inst *inst, struct msgb *msg)
{
	struct msgb *nmsg;

	/* free stored msg */
	if (inst->cp_msg) {
		msgb_free(inst->cp_msg);
		inst->cp_msg = NULL;
	}

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "MM layer is released\n", inst->id);
	/* 5.3.4 enter idle */
	new_cp_state(inst, GSM411_CPS_IDLE);
	/* indicate error */
	nmsg = gsm411_msgb_alloc();
	inst->mn_recv(inst, GSM411_MNSMS_ERROR_IND, nmsg);
	msgb_free(nmsg);

	return 0;
}

/* abort SMC connection */
static int gsm411_mnsms_abort_req(struct gsm411_smc_inst *inst,
	struct msgb *msg)
{
	struct msgb *nmsg;

	/* free stored msg */
	if (inst->cp_msg) {
		msgb_free(inst->cp_msg);
		inst->cp_msg = NULL;
	}

	/* 5.3.4 go idle */
	new_cp_state(inst, GSM411_CPS_IDLE);
	/* send MMSMS_DATA_REQ with CP-ERROR */
	inst->mm_send(inst, GSM411_MMSMS_DATA_REQ, msg, GSM411_MT_CP_ERROR);
	/* release MM connection */
	nmsg = gsm411_msgb_alloc();
	return inst->mm_send(inst, GSM411_MMSMS_REL_REQ, nmsg, 0);
}

/* statefull handling for MNSMS SAP messages */
static const struct smcdownstate {
	uint32_t	states;
	int		type;
	const char 	*name;
	int		(*rout) (struct gsm411_smc_inst *inst,
					struct msgb *msg);
} smcdownstatelist[] = {
	/* establish request */
	{SBIT(GSM411_CPS_IDLE),
	GSM411_MNSMS_EST_REQ,
	 "MNSMS-EST-REQ", gsm411_mnsms_est_req},

	/* release request */
	{ALL_STATES,
	GSM411_MNSMS_REL_REQ,
	 "MNSMS-REL-REQ", gsm411_mnsms_rel_req},

	/* data request */
	{SBIT(GSM411_CPS_MM_ESTABLISHED),
	GSM411_MNSMS_DATA_REQ,
	 "MNSMS-DATA-REQ", gsm411_mnsms_data_req},

	/* abort request */
	{ALL_STATES - SBIT(GSM411_CPS_IDLE),
	GSM411_MNSMS_ABORT_REQ,
	 "MNSMS-ABORT-REQ", gsm411_mnsms_abort_req},
};

#define SMCDOWNSLLEN \
	(sizeof(smcdownstatelist) / sizeof(struct smcdownstate))

/* message from upper layer */
int gsm411_smc_send(struct gsm411_smc_inst *inst, int msg_type,
	struct msgb *msg)
{
	int i, rc;

	/* find function for current state and message */
	for (i = 0; i < SMCDOWNSLLEN; i++) {
		if ((msg_type == smcdownstatelist[i].type)
		  && (SBIT(inst->cp_state) & smcdownstatelist[i].states))
				break;
	}
	if (i == SMCDOWNSLLEN) {
		LOGP(DLSMS, LOGL_NOTICE,
			SMC_LOG_STR "message %u unhandled at this state %s.\n",
			inst->id, msg_type, smc_state_names[inst->cp_state]);
		msgb_free(msg);
		return 0;
	}

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "message %s received in state %s\n", inst->id,
		smcdownstatelist[i].name, smc_state_names[inst->cp_state]);

	rc = smcdownstatelist[i].rout(inst, msg);

	return rc;
}

/* statefull handling for MMSMS SAP messages */
static const struct smcdatastate {
	uint32_t	states;
	int		type, cp_type;
	const char 	*name;
	int		(*rout) (struct gsm411_smc_inst *inst,
					struct msgb *msg);
} smcdatastatelist[] = {
	/* establish confirm */
	{SBIT(GSM411_CPS_MM_CONN_PENDING),
	 GSM411_MMSMS_EST_CNF, 0,
	 "MMSMS-EST-CNF", gsm411_mmsms_est_cnf},

	/* establish indication (CP DATA) */
	{SBIT(GSM411_CPS_IDLE),
	 GSM411_MMSMS_EST_IND, GSM411_MT_CP_DATA,
	 "MMSMS-EST-IND (CP DATA)", gsm411_mmsms_cp_data},

	/* data indication (CP DATA) */
	{SBIT(GSM411_CPS_MM_ESTABLISHED),
	 GSM411_MMSMS_DATA_IND, GSM411_MT_CP_DATA,
	 "MMSMS-DATA-IND (CP DATA)", gsm411_mmsms_cp_data},

	/* data indication (CP ACK) */
	{SBIT(GSM411_CPS_WAIT_CP_ACK),
	 GSM411_MMSMS_DATA_IND, GSM411_MT_CP_ACK,
	 "MMSMS-DATA-IND (CP ACK)", gsm411_mmsms_cp_ack},

	/* data indication (CP ERROR) */
	{ALL_STATES,
	 GSM411_MMSMS_DATA_IND, GSM411_MT_CP_ERROR,
	 "MMSMS-DATA-IND (CP_ERROR)", gsm411_mmsms_cp_error},

	/* release indication */
	{ALL_STATES - SBIT(GSM411_CPS_IDLE),
	 GSM411_MMSMS_REL_IND, 0,
	 "MMSMS-REL-IND", gsm411_mmsms_rel_ind},

};

#define SMCDATASLLEN \
	(sizeof(smcdatastatelist) / sizeof(struct smcdatastate))

/* message from lower layer
 * WARNING: We must not free msg, since it will be performed by the
 * lower layer. */
int gsm411_smc_recv(struct gsm411_smc_inst *inst, int msg_type,
	struct msgb *msg, int cp_msg_type)
{
	int i, rc;

	/* find function for current state and message */
	for (i = 0; i < SMCDATASLLEN; i++) {
		/* state must match, MM message must match
		 * CP msg must match only in case of MMSMS_DATA_IND
		 */
		if ((msg_type == smcdatastatelist[i].type)
		  && (SBIT(inst->cp_state) & smcdatastatelist[i].states)
		  && (msg_type != GSM411_MMSMS_DATA_IND
		   || cp_msg_type == smcdatastatelist[i].cp_type))
				break;
	}
	if (i == SMCDATASLLEN) {
		LOGP(DLSMS, LOGL_NOTICE,
			SMC_LOG_STR "message 0x%x/%u unhandled at this "
			"state %s.\n", inst->id, msg_type, cp_msg_type,
			smc_state_names[inst->cp_state]);
		if (msg_type == GSM411_MMSMS_EST_IND
		 || msg_type == GSM411_MMSMS_DATA_IND) {
			struct msgb *nmsg;

			LOGP(DLSMS, LOGL_NOTICE,
				SMC_LOG_STR "RX Unimplemented CP "
				"msg_type: 0x%02x\n", inst->id, msg_type);
			/* 5.3.4 enter idle */
			new_cp_state(inst, GSM411_CPS_IDLE);
			/* indicate error */
			gsm411_tx_cp_error(inst,
				GSM411_CP_CAUSE_MSGTYPE_NOTEXIST);
			/* send error indication to upper layer */
			nmsg = gsm411_msgb_alloc();
			inst->mn_recv(inst, GSM411_MNSMS_ERROR_IND, nmsg);
			msgb_free(nmsg);
			/* release MM connection */
			nmsg = gsm411_msgb_alloc();
			return inst->mm_send(inst, GSM411_MMSMS_REL_REQ, nmsg,
						0);
		}
		return 0;
	}

	LOGP(DLSMS, LOGL_INFO,
		SMC_LOG_STR "message %s received in state %s\n", inst->id,
		smcdatastatelist[i].name, smc_state_names[inst->cp_state]);

	rc = smcdatastatelist[i].rout(inst, msg);

	return rc;
}