1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
51
52
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
98
102
106
110
114
118
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
156
157
158
159
160
161
162
163
164
165
169
170
171
172
173
174
175
176
177
178
179
180
183
184
187
191
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
223
234
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
265
266
267
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
296
300
304
309
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
357
358
359
360
361
362
363
364
365
366
370
371
372
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
401
402
403
404
405
406
407
408
409
410
411
412
413
414
418
419
420
431
432
433
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
468
473
474
475
476
477
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
518
519
520
521
522
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
543
548
552
557
560
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
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
625
626
627
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
659
660
661
662
663
664
665
666
667
668
669
681
682
683
/* ... */
/* ... */
#include <string.h>
#include "stack/bt_types.h"
#include "stack/rfcdefs.h"
#include "stack/l2cdefs.h"
#include "stack/port_api.h"
#include "port_int.h"
#include "stack/l2c_api.h"
#include "rfc_int.h"
#include "common/bt_defs.h"
#include "osi/allocator.h"
#include "osi/mutex.h"
#include "common/bt_target.h"12 includes
#if (defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE)
#define L2CAP_SUCCESS 0
#define L2CAP_ERROR 1
static tL2CAP_ERTM_INFO rfc_l2c_etm_opt =
{
L2CAP_FCR_ERTM_MODE,
L2CAP_FCR_CHAN_OPT_ERTM|L2CAP_FCR_CHAN_OPT_BASIC,
L2CAP_USER_RX_BUF_SIZE,
L2CAP_USER_TX_BUF_SIZE,
L2CAP_FCR_RX_BUF_SIZE,
L2CAP_FCR_TX_BUF_SIZE
}{...};
static tL2CAP_FCR_OPTS rfc_l2c_fcr_opts_def =
{
L2CAP_FCR_ERTM_MODE,
RFC_FCR_OPT_TX_WINDOW_SIZE,
RFC_FCR_OPT_MAX_TX_B4_DISCNT,
RFC_FCR_OPT_RETX_TOUT,
RFC_FCR_OPT_MONITOR_TOUT,
RFC_FCR_OPT_MAX_PDU_SIZE
}{...};
static void rfc_mx_sm_state_idle (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_sm_state_wait_conn_cnf (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_sm_state_configure (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_sm_sabme_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_sm_state_wait_sabme (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_sm_state_connected (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_sm_state_disc_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
static void rfc_mx_send_config_req (tRFC_MCB *p_mcb);
static void rfc_mx_conf_ind (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg);
static void rfc_mx_conf_cnf (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg);
/* ... */
void rfc_mx_sm_execute (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_DEBUG("%s st:%d, evt:%d\n", __func__, p_mcb->state, event);
switch (p_mcb->state) {
case RFC_MX_STATE_IDLE:
rfc_mx_sm_state_idle (p_mcb, event, p_data);
break;
...
case RFC_MX_STATE_WAIT_CONN_CNF:
rfc_mx_sm_state_wait_conn_cnf (p_mcb, event, p_data);
break;
...
case RFC_MX_STATE_CONFIGURE:
rfc_mx_sm_state_configure (p_mcb, event, p_data);
break;
...
case RFC_MX_STATE_SABME_WAIT_UA:
rfc_mx_sm_sabme_wait_ua (p_mcb, event, p_data);
break;
...
case RFC_MX_STATE_WAIT_SABME:
rfc_mx_sm_state_wait_sabme (p_mcb, event, p_data);
break;
...
case RFC_MX_STATE_CONNECTED:
rfc_mx_sm_state_connected (p_mcb, event, p_data);
break;
...
case RFC_MX_STATE_DISC_WAIT_UA:
rfc_mx_sm_state_disc_wait_ua (p_mcb, event, p_data);
break;
...
}{...}
}{...}
/* ... */
void rfc_mx_sm_state_idle (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
tL2CAP_ERTM_INFO *ertm_opt = NULL;
RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_idle - evt:%d", event);
switch (event) {
case RFC_MX_EVENT_START_REQ:
p_mcb->peer_l2cap_mtu = L2CAP_DEFAULT_MTU - RFCOMM_MIN_OFFSET - 1;
ertm_opt = rfc_cb.port.enable_l2cap_ertm ? &rfc_l2c_etm_opt : NULL;
p_mcb->lcid = L2CA_ErtmConnectReq (BT_PSM_RFCOMM, p_mcb->bd_addr, ertm_opt);
if (p_mcb->lcid == 0) {
PORT_StartCnf (p_mcb, RFCOMM_ERROR);
return;
}{...}
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
p_mcb->state = RFC_MX_STATE_WAIT_CONN_CNF;
return;
...
case RFC_MX_EVENT_START_RSP:
case RFC_MX_EVENT_CONN_CNF:
case RFC_MX_EVENT_CONF_IND:
case RFC_MX_EVENT_CONF_CNF:
RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
return;
...
case RFC_MX_EVENT_CONN_IND:
rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT);
ertm_opt = rfc_cb.port.enable_l2cap_ertm ? &rfc_l2c_etm_opt : NULL;
L2CA_ErtmConnectRsp (p_mcb->bd_addr, *((UINT8 *)p_data), p_mcb->lcid, L2CAP_CONN_OK, 0, ertm_opt);
rfc_mx_send_config_req (p_mcb);
p_mcb->state = RFC_MX_STATE_CONFIGURE;
return;
...
case RFC_EVENT_SABME:
break;
...
case RFC_EVENT_UA:
case RFC_EVENT_DM:
return;
...
case RFC_EVENT_DISC:
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, TRUE);
return;
...
case RFC_EVENT_UIH:
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, FALSE);
return;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
void rfc_mx_sm_state_wait_conn_cnf (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_wait_conn_cnf - evt:%d", event);
switch (event) {
case RFC_MX_EVENT_START_REQ:
RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
return;
/* ... */
... case RFC_MX_EVENT_CONF_IND:
rfc_mx_conf_ind (p_mcb, (tL2CAP_CFG_INFO *)p_data);
return;
...
case RFC_MX_EVENT_CONN_CNF:
if (*((UINT16 *)p_data) != L2CAP_SUCCESS) {
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_StartCnf (p_mcb, *((UINT16 *)p_data));
return;
}{...}
p_mcb->state = RFC_MX_STATE_CONFIGURE;
rfc_mx_send_config_req (p_mcb);
return;
...
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
...
case RFC_EVENT_TIMEOUT:
p_mcb->state = RFC_MX_STATE_IDLE;
L2CA_DisconnectReq (p_mcb->lcid);
if (p_mcb->pending_lcid) {
UINT16 i;
UINT8 idx;
RFCOMM_TRACE_DEBUG ("RFCOMM MX retry as acceptor in collision case - evt:%d in state:%d", event, p_mcb->state);
rfc_save_lcid_mcb (NULL, p_mcb->lcid);
p_mcb->lcid = p_mcb->pending_lcid;
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
p_mcb->is_initiator = FALSE;
for (i = 0; i < RFCOMM_MAX_DLCI; i += 2) {
if ((idx = p_mcb->port_inx[i]) != 0) {
p_mcb->port_inx[i] = 0;
p_mcb->port_inx[i + 1] = idx;
rfc_cb.port.port[idx - 1].dlci += 1;
RFCOMM_TRACE_DEBUG ("RFCOMM MX - DLCI:%d -> %d", i, rfc_cb.port.port[idx - 1].dlci);
}{...}
}{...}
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONN_IND, &(p_mcb->pending_id));
}{...} else {
PORT_CloseInd (p_mcb);
}{...}
return;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
void rfc_mx_sm_state_configure (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_configure - evt:%d", event);
switch (event) {
case RFC_MX_EVENT_START_REQ:
case RFC_MX_EVENT_CONN_CNF:
RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
return;
...
case RFC_MX_EVENT_CONF_IND:
rfc_mx_conf_ind (p_mcb, (tL2CAP_CFG_INFO *)p_data);
return;
...
case RFC_MX_EVENT_CONF_CNF:
rfc_mx_conf_cnf (p_mcb, (tL2CAP_CFG_INFO *)p_data);
return;
...
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
...
case RFC_EVENT_TIMEOUT:
p_mcb->state = RFC_MX_STATE_IDLE;
L2CA_DisconnectReq (p_mcb->lcid);
PORT_StartCnf (p_mcb, RFCOMM_ERROR);
return;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
void rfc_mx_sm_sabme_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
UNUSED(p_data);
RFCOMM_TRACE_EVENT ("rfc_mx_sm_sabme_wait_ua - evt:%d", event);
switch (event) {
case RFC_MX_EVENT_START_REQ:
case RFC_MX_EVENT_CONN_CNF:
RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
return;
/* ... */
...
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
...
case RFC_EVENT_UA:
rfc_timer_stop (p_mcb);
p_mcb->state = RFC_MX_STATE_CONNECTED;
p_mcb->peer_ready = TRUE;
PORT_StartCnf (p_mcb, RFCOMM_SUCCESS);
return;
...
case RFC_EVENT_DM:
rfc_timer_stop (p_mcb);
...
case RFC_MX_EVENT_CONF_IND:
case RFC_MX_EVENT_CONF_CNF:
case RFC_EVENT_TIMEOUT:
p_mcb->state = RFC_MX_STATE_IDLE;
L2CA_DisconnectReq (p_mcb->lcid);
PORT_StartCnf (p_mcb, RFCOMM_ERROR);
return;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
void rfc_mx_sm_state_wait_sabme (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_wait_sabme - evt:%d", event);
switch (event) {
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
...
case RFC_EVENT_SABME:
if (p_mcb->pending_lcid) {
p_mcb->pending_lcid = 0;
rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
rfc_timer_stop (p_mcb);
p_mcb->state = RFC_MX_STATE_CONNECTED;
p_mcb->peer_ready = TRUE;
PORT_StartCnf (p_mcb, RFCOMM_SUCCESS);
}{...} else {
rfc_timer_stop (p_mcb);
PORT_StartInd (p_mcb);
}{...}
return;
...
case RFC_MX_EVENT_START_RSP:
if (*((UINT16 *)p_data) != RFCOMM_SUCCESS) {
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, TRUE);
}{...} else {
rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
p_mcb->state = RFC_MX_STATE_CONNECTED;
p_mcb->peer_ready = TRUE;
}{...}
return;
...
case RFC_MX_EVENT_CONF_IND:
case RFC_MX_EVENT_CONF_CNF:
case RFC_EVENT_TIMEOUT:
p_mcb->state = RFC_MX_STATE_IDLE;
L2CA_DisconnectReq (p_mcb->lcid);
PORT_CloseInd (p_mcb);
return;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
void rfc_mx_sm_state_connected (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
UNUSED(p_data);
RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_connected - evt:%d", event);
switch (event) {
case RFC_EVENT_TIMEOUT:
case RFC_MX_EVENT_CLOSE_REQ:
rfc_timer_start (p_mcb, RFC_DISC_TIMEOUT);
p_mcb->state = RFC_MX_STATE_DISC_WAIT_UA;
rfc_send_disc (p_mcb, RFCOMM_MX_DLCI);
return;
...
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
...
case RFC_EVENT_DISC:
rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
if (p_mcb->is_initiator) {
L2CA_DisconnectReq (p_mcb->lcid);
}{...}
PORT_CloseInd (p_mcb);
return;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
void rfc_mx_sm_state_disc_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
BT_HDR *p_buf;
RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_disc_wait_ua - evt:%d", event);
switch (event) {
case RFC_EVENT_UA:
case RFC_EVENT_DM:
case RFC_EVENT_TIMEOUT:
L2CA_DisconnectReq (p_mcb->lcid);
if (p_mcb->restart_required) {
tL2CAP_ERTM_INFO *ertm_opt = rfc_cb.port.enable_l2cap_ertm ? &rfc_l2c_etm_opt : NULL;
p_mcb->lcid = L2CA_ErtmConnectReq(BT_PSM_RFCOMM, p_mcb->bd_addr, ertm_opt);
if (p_mcb->lcid == 0) {
PORT_StartCnf (p_mcb, RFCOMM_ERROR);
return;
}{...}
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
while ((p_buf = (BT_HDR *)fixed_queue_dequeue(p_mcb->cmd_q, 0)) != NULL) {
osi_free(p_buf);
}{...}
rfc_timer_start (p_mcb, RFC_MCB_INIT_INACT_TIMER);
p_mcb->is_initiator = TRUE;
p_mcb->restart_required = FALSE;
p_mcb->local_cfg_sent = FALSE;
p_mcb->peer_cfg_rcvd = FALSE;
p_mcb->state = RFC_MX_STATE_WAIT_CONN_CNF;
return;
}{...}
rfc_release_multiplexer_channel (p_mcb);
return;
...
case RFC_EVENT_DISC:
rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
return;
...
case RFC_EVENT_UIH:
osi_free (p_data);
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, FALSE);
return;
...
case RFC_MX_EVENT_START_REQ:
p_mcb->restart_required = TRUE;
return;
...
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
...
case RFC_MX_EVENT_CLOSE_REQ:
return;
...
case RFC_MX_EVENT_QOS_VIOLATION_IND:
break;...
}{...}
RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}{...}
/* ... */
static void rfc_mx_send_config_req (tRFC_MCB *p_mcb)
{
tL2CAP_CFG_INFO cfg;
RFCOMM_TRACE_EVENT ("rfc_mx_send_config_req");
memset (&cfg, 0, sizeof (tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = L2CAP_MTU_SIZE;
if (rfc_cb.port.enable_l2cap_ertm) {
cfg.fcr_present = TRUE;
cfg.fcr = rfc_l2c_fcr_opts_def;
}{...}
/* ... */
L2CA_ConfigReq (p_mcb->lcid, &cfg);
}{...}
/* ... */
static void rfc_mx_conf_cnf (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg)
{
if (p_cfg->result != L2CAP_CFG_OK) {
if (p_mcb->is_initiator) {
PORT_StartCnf (p_mcb, p_cfg->result);
L2CA_DisconnectReq (p_mcb->lcid);
}{...}
rfc_release_multiplexer_channel (p_mcb);
return;
}{...}
p_mcb->local_cfg_sent = TRUE;
if ((p_mcb->state == RFC_MX_STATE_CONFIGURE) && p_mcb->peer_cfg_rcvd) {
if (p_mcb->is_initiator) {
p_mcb->state = RFC_MX_STATE_SABME_WAIT_UA;
rfc_send_sabme (p_mcb, RFCOMM_MX_DLCI);
rfc_timer_start (p_mcb, RFC_T1_TIMEOUT);
}{...} else {
p_mcb->state = RFC_MX_STATE_WAIT_SABME;
rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT);
/* ... */
}{...}
}{...}
}{...}
/* ... */
static void rfc_mx_conf_ind (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg)
{
if (p_cfg->mtu_present) {
p_mcb->peer_l2cap_mtu = p_cfg->mtu - RFCOMM_MIN_OFFSET - 1;
}{...} else {
p_mcb->peer_l2cap_mtu = L2CAP_DEFAULT_MTU - RFCOMM_MIN_OFFSET - 1;
}{...}
p_cfg->mtu_present = FALSE;
p_cfg->flush_to_present = FALSE;
p_cfg->qos_present = FALSE;
p_cfg->result = L2CAP_CFG_OK;
L2CA_ConfigRsp (p_mcb->lcid, p_cfg);
p_mcb->peer_cfg_rcvd = TRUE;
if ((p_mcb->state == RFC_MX_STATE_CONFIGURE) && p_mcb->local_cfg_sent) {
if (p_mcb->is_initiator) {
p_mcb->state = RFC_MX_STATE_SABME_WAIT_UA;
rfc_send_sabme (p_mcb, RFCOMM_MX_DLCI);
rfc_timer_start (p_mcb, RFC_T1_TIMEOUT);
}{...} else {
p_mcb->state = RFC_MX_STATE_WAIT_SABME;
rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT);
/* ... */
}{...}
}{...}
}{...}
...
/* ... */#endif