summaryrefslogtreecommitdiff
path: root/stack/l2cap/l2c_ble.c
blob: 0f7eda6adb0a4df65d05b3cb428fabb94328db39 (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
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
/******************************************************************************
 *
 *  Copyright (C) 2009-2012 Broadcom Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  this file contains functions relating to BLE management.
 *
 ******************************************************************************/

#include <string.h>
#include "bt_target.h"
#include "bt_utils.h"
#include "l2cdefs.h"
#include "l2c_int.h"
#include "btu.h"
#include "btm_int.h"
#include "hcimsgs.h"
#include "device/include/controller.h"
#include "stack_config.h"

#if (BLE_INCLUDED == TRUE)

extern fixed_queue_t *btu_general_alarm_queue;

static void l2cble_start_conn_update (tL2C_LCB *p_lcb);

/*******************************************************************************
**
**  Function        L2CA_CancelBleConnectReq
**
**  Description     Cancel a pending connection attempt to a BLE device.
**
**  Parameters:     BD Address of remote
**
**  Return value:   TRUE if connection was cancelled
**
*******************************************************************************/
BOOLEAN L2CA_CancelBleConnectReq (BD_ADDR rem_bda)
{
    tL2C_LCB *p_lcb;

    /* There can be only one BLE connection request outstanding at a time */
    if (btm_ble_get_conn_st() == BLE_CONN_IDLE)
    {
        L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - no connection pending");
        return(FALSE);
    }

    if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN))
    {
        L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - different  BDA Connecting: %08x%04x  Cancel: %08x%04x",
                              (l2cb.ble_connecting_bda[0]<<24)+(l2cb.ble_connecting_bda[1]<<16)+(l2cb.ble_connecting_bda[2]<<8)+l2cb.ble_connecting_bda[3],
                              (l2cb.ble_connecting_bda[4]<<8)+l2cb.ble_connecting_bda[5],
                              (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]);

        return(FALSE);
    }

    if (btsnd_hcic_ble_create_conn_cancel())
    {
        p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_LE);
        /* Do not remove lcb if an LE link is already up as a peripheral */
        if (p_lcb != NULL &&
            !(p_lcb->link_role == HCI_ROLE_SLAVE && BTM_ACL_IS_CONNECTED(rem_bda)))
        {
            p_lcb->disc_reason = L2CAP_CONN_CANCEL;
            l2cu_release_lcb (p_lcb);
        }
        /* update state to be cancel, wait for connection cancel complete */
        btm_ble_set_conn_st (BLE_CONN_CANCEL);

        return(TRUE);
    }
    else
        return(FALSE);
}

/*******************************************************************************
**
**  Function        L2CA_UpdateBleConnParams
**
**  Description     Update BLE connection parameters.
**
**  Parameters:     BD Address of remote
**
**  Return value:   TRUE if update started
**
*******************************************************************************/
BOOLEAN L2CA_UpdateBleConnParams (BD_ADDR rem_bda, UINT16 min_int, UINT16 max_int,
                                            UINT16 latency, UINT16 timeout)
{
    tL2C_LCB            *p_lcb;
    tACL_CONN           *p_acl_cb = btm_bda_to_acl(rem_bda, BT_TRANSPORT_LE);

    /* See if we have a link control block for the remote device */
    p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE);

    /* If we don't have one, create one and accept the connection. */
    if (!p_lcb || !p_acl_cb)
    {
        L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - unknown BD_ADDR %08x%04x",
                              (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
                              (rem_bda[4]<<8)+rem_bda[5]);
        return(FALSE);
    }

    if (p_lcb->transport != BT_TRANSPORT_LE)
    {
        L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - BD_ADDR %08x%04x not LE",
                              (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
                              (rem_bda[4]<<8)+rem_bda[5]);
        return(FALSE);
    }

    p_lcb->min_interval = min_int;
    p_lcb->max_interval = max_int;
    p_lcb->latency = latency;
    p_lcb->timeout = timeout;
    p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;

    l2cble_start_conn_update(p_lcb);

    return(TRUE);
}


/*******************************************************************************
**
**  Function        L2CA_EnableUpdateBleConnParams
**
**  Description     Enable or disable update based on the request from the peer
**
**  Parameters:     BD Address of remote
**
**  Return value:   TRUE if update started
**
*******************************************************************************/
BOOLEAN L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, BOOLEAN enable)
{
    if (stack_config_get_interface()->get_pts_conn_updates_disabled())
        return false;

    tL2C_LCB            *p_lcb;

    /* See if we have a link control block for the remote device */
    p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE);

    if (!p_lcb)
    {
        L2CAP_TRACE_WARNING ("L2CA_EnableUpdateBleConnParams - unknown BD_ADDR %08x%04x",
            (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
            (rem_bda[4]<<8)+rem_bda[5]);
        return (FALSE);
    }

    L2CAP_TRACE_API ("%s - BD_ADDR %08x%04x enable %d current upd state 0x%02x",__FUNCTION__,
        (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
        (rem_bda[4]<<8)+rem_bda[5], enable, p_lcb->conn_update_mask);

    if (p_lcb->transport != BT_TRANSPORT_LE)
    {
        L2CAP_TRACE_WARNING ("%s - BD_ADDR %08x%04x not LE (link role %d)", __FUNCTION__,
                              (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
                              (rem_bda[4]<<8)+rem_bda[5], p_lcb->link_role);
        return (FALSE);
    }

    if (enable)
        p_lcb->conn_update_mask &= ~L2C_BLE_CONN_UPDATE_DISABLE;
    else
        p_lcb->conn_update_mask |= L2C_BLE_CONN_UPDATE_DISABLE;

    l2cble_start_conn_update(p_lcb);

    return (TRUE);
}


/*******************************************************************************
**
** Function         L2CA_GetBleConnRole
**
** Description      This function returns the connection role.
**
** Returns          link role.
**
*******************************************************************************/
UINT8 L2CA_GetBleConnRole (BD_ADDR bd_addr)
{
    UINT8       role = HCI_ROLE_UNKNOWN;

    tL2C_LCB *p_lcb;

    if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_LE)) != NULL)
        role = p_lcb->link_role;

    return role;
}
/*******************************************************************************
**
** Function         L2CA_GetDisconnectReason
**
** Description      This function returns the disconnect reason code.
**
** Returns          disconnect reason
**
*******************************************************************************/
UINT16 L2CA_GetDisconnectReason (BD_ADDR remote_bda, tBT_TRANSPORT transport)
{
    tL2C_LCB            *p_lcb;
    UINT16              reason = 0;

    if ((p_lcb = l2cu_find_lcb_by_bd_addr (remote_bda, transport)) != NULL)
        reason = p_lcb->disc_reason;

    L2CAP_TRACE_DEBUG ("L2CA_GetDisconnectReason=%d ",reason);

    return reason;
}

void l2cble_use_preferred_conn_params(BD_ADDR bda) {
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
    tBTM_SEC_DEV_REC    *p_dev_rec = btm_find_or_alloc_dev (bda);

    /* If there are any preferred connection parameters, set them now */
    if ( (p_dev_rec->conn_params.min_conn_int     >= BTM_BLE_CONN_INT_MIN ) &&
         (p_dev_rec->conn_params.min_conn_int     <= BTM_BLE_CONN_INT_MAX ) &&
         (p_dev_rec->conn_params.max_conn_int     >= BTM_BLE_CONN_INT_MIN ) &&
         (p_dev_rec->conn_params.max_conn_int     <= BTM_BLE_CONN_INT_MAX ) &&
         (p_dev_rec->conn_params.slave_latency    <= BTM_BLE_CONN_LATENCY_MAX ) &&
         (p_dev_rec->conn_params.supervision_tout >= BTM_BLE_CONN_SUP_TOUT_MIN) &&
         (p_dev_rec->conn_params.supervision_tout <= BTM_BLE_CONN_SUP_TOUT_MAX) &&
         ((p_lcb->min_interval < p_dev_rec->conn_params.min_conn_int &&
          p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ||
          (p_lcb->min_interval > p_dev_rec->conn_params.max_conn_int) ||
          (p_lcb->latency > p_dev_rec->conn_params.slave_latency) ||
          (p_lcb->timeout > p_dev_rec->conn_params.supervision_tout)))
    {
        L2CAP_TRACE_DEBUG ("%s: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d", __func__,
                            p_lcb->handle, p_dev_rec->conn_params.min_conn_int, p_dev_rec->conn_params.max_conn_int,
                            p_dev_rec->conn_params.slave_latency, p_dev_rec->conn_params.supervision_tout);

        p_lcb->min_interval = p_dev_rec->conn_params.min_conn_int;
        p_lcb->max_interval = p_dev_rec->conn_params.max_conn_int;
        p_lcb->timeout      = p_dev_rec->conn_params.supervision_tout;
        p_lcb->latency      = p_dev_rec->conn_params.slave_latency;

        btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle,
                                           p_dev_rec->conn_params.min_conn_int,
                                           p_dev_rec->conn_params.max_conn_int,
                                           p_dev_rec->conn_params.slave_latency,
                                           p_dev_rec->conn_params.supervision_tout,
                                           0, 0);
    }
}

/*******************************************************************************
**
** Function l2cble_notify_le_connection
**
** Description This function notifiy the l2cap connection to the app layer
**
** Returns none
**
*******************************************************************************/
void l2cble_notify_le_connection (BD_ADDR bda)
{
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
    tACL_CONN *p_acl = btm_bda_to_acl(bda, BT_TRANSPORT_LE) ;
    tL2C_CCB *p_ccb;

    if (p_lcb != NULL && p_acl != NULL && p_lcb->link_state != LST_CONNECTED)
    {
        /* update link status */
        btm_establish_continue(p_acl);
        /* update l2cap link status and send callback */
        p_lcb->link_state = LST_CONNECTED;
        l2cu_process_fixed_chnl_resp (p_lcb);
    }

    if (p_lcb != NULL) {
        /* For all channels, send the event through their FSMs */
        for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb)
        {
            if (p_ccb->chnl_state == CST_CLOSED)
                l2c_csm_execute (p_ccb, L2CEVT_LP_CONNECT_CFM, NULL);
        }
    }

    l2cble_use_preferred_conn_params(bda);
}

/*******************************************************************************
**
** Function         l2cble_scanner_conn_comp
**
** Description      This function is called when an HCI Connection Complete
**                  event is received while we are a scanner (so we are master).
**
** Returns          void
**
*******************************************************************************/
void l2cble_scanner_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
                               UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
    tL2C_LCB            *p_lcb;
    tBTM_SEC_DEV_REC    *p_dev_rec = btm_find_or_alloc_dev (bda);

    L2CAP_TRACE_DEBUG ("l2cble_scanner_conn_comp: HANDLE=%d addr_type=%d conn_interval=%d slave_latency=%d supervision_tout=%d",
                        handle,  type, conn_interval, conn_latency, conn_timeout);

    l2cb.is_ble_connecting = FALSE;

    /* See if we have a link control block for the remote device */
    p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);

    /* If we don't have one, create one. this is auto connection complete. */
    if (!p_lcb)
    {
        p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE);
        if (!p_lcb)
        {
            btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
            L2CAP_TRACE_ERROR ("l2cble_scanner_conn_comp - failed to allocate LCB");
            return;
        }
        else
        {
            if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
            {
                btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
                L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
                return ;
            }
        }
    }
    else if (p_lcb->link_state != LST_CONNECTING)
    {
        L2CAP_TRACE_ERROR ("L2CAP got BLE scanner conn_comp in bad state: %d", p_lcb->link_state);
        return;
    }
    alarm_cancel(p_lcb->l2c_lcb_timer);

    /* Save the handle */
    p_lcb->handle = handle;

    /* Connected OK. Change state to connected, we were scanning so we are master */
    p_lcb->link_role  = HCI_ROLE_MASTER;
    p_lcb->transport  = BT_TRANSPORT_LE;

    /* update link parameter, set slave link as non-spec default upon link up */
    p_lcb->min_interval =  p_lcb->max_interval = conn_interval;
    p_lcb->timeout      =  conn_timeout;
    p_lcb->latency      =  conn_latency;
    p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;

    /* Tell BTM Acl management about the link */
    btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE);

    p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;

    btm_ble_set_conn_st(BLE_CONN_IDLE);

#if BLE_PRIVACY_SPT == TRUE
    btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, TRUE);
#endif
}


/*******************************************************************************
**
** Function         l2cble_advertiser_conn_comp
**
** Description      This function is called when an HCI Connection Complete
**                  event is received while we are an advertiser (so we are slave).
**
** Returns          void
**
*******************************************************************************/
void l2cble_advertiser_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
                                  UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
    tL2C_LCB            *p_lcb;
    tBTM_SEC_DEV_REC    *p_dev_rec;
    UNUSED(type);
    UNUSED(conn_interval);
    UNUSED(conn_latency);
    UNUSED(conn_timeout);

    /* See if we have a link control block for the remote device */
    p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);

    /* If we don't have one, create one and accept the connection. */
    if (!p_lcb)
    {
        p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE);
        if (!p_lcb)
        {
            btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
            L2CAP_TRACE_ERROR ("l2cble_advertiser_conn_comp - failed to allocate LCB");
            return;
        }
        else
        {
            if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
            {
                btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
                L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
                return ;
            }
        }
    }

    /* Save the handle */
    p_lcb->handle = handle;

    /* Connected OK. Change state to connected, we were advertising, so we are slave */
    p_lcb->link_role  = HCI_ROLE_SLAVE;
    p_lcb->transport  = BT_TRANSPORT_LE;

    /* update link parameter, set slave link as non-spec default upon link up */
    p_lcb->min_interval = p_lcb->max_interval = conn_interval;
    p_lcb->timeout      =  conn_timeout;
    p_lcb->latency      =  conn_latency;
    p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;

    /* Tell BTM Acl management about the link */
    p_dev_rec = btm_find_or_alloc_dev (bda);

    btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE);

#if BLE_PRIVACY_SPT == TRUE
    btm_ble_disable_resolving_list(BTM_BLE_RL_ADV, TRUE);
#endif

    p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;

    if (!HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(controller_get_interface()->get_features_ble()->as_array))
    {
        p_lcb->link_state = LST_CONNECTED;
        l2cu_process_fixed_chnl_resp (p_lcb);
    }

    /* when adv and initiating are both active, cancel the direct connection */
    if (l2cb.is_ble_connecting && memcmp(bda, l2cb.ble_connecting_bda, BD_ADDR_LEN) == 0)
    {
        L2CA_CancelBleConnectReq(bda);
    }
}

/*******************************************************************************
**
** Function         l2cble_conn_comp
**
** Description      This function is called when an HCI Connection Complete
**                  event is received.
**
** Returns          void
**
*******************************************************************************/
void l2cble_conn_comp(UINT16 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type,
                      UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
    btm_ble_update_link_topology_mask(role, TRUE);

    if (role == HCI_ROLE_MASTER)
    {
        l2cble_scanner_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
    }
    else
    {
        l2cble_advertiser_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
    }
}

/*******************************************************************************
**
**  Function        l2cble_start_conn_update
**
**  Description     start BLE connection parameter update process based on status
**
**  Parameters:     lcb : l2cap link control block
**
**  Return value:   none
**
*******************************************************************************/
static void l2cble_start_conn_update (tL2C_LCB *p_lcb)
{
    UINT16 min_conn_int, max_conn_int, slave_latency, supervision_tout;
    tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE);

    // TODO(armansito): The return value of this call wasn't being used but the
    // logic of this function might be depending on its side effects. We should
    // verify if this call is needed at all and remove it otherwise.
    btm_find_or_alloc_dev(p_lcb->remote_bd_addr);

    if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) return;

    if (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE)
    {
        /* application requests to disable parameters update.
           If parameters are already updated, lets set them
           up to what has been requested during connection establishement */
        if (p_lcb->conn_update_mask & L2C_BLE_NOT_DEFAULT_PARAM &&
            /* current connection interval is greater than default min */
            p_lcb->min_interval > BTM_BLE_CONN_INT_MIN)
        {
            /* use 7.5 ms as fast connection parameter, 0 slave latency */
            min_conn_int = max_conn_int = BTM_BLE_CONN_INT_MIN;
            slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF;
            supervision_tout = BTM_BLE_CONN_TIMEOUT_DEF;

            /* if both side 4.1, or we are master device, send HCI command */
            if (p_lcb->link_role == HCI_ROLE_MASTER
#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
                || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) &&
                    HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features))
#endif
                 )
            {
                btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, min_conn_int, max_conn_int,
                                                  slave_latency, supervision_tout, 0, 0);
                p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
            }
            else
            {
                l2cu_send_peer_ble_par_req (p_lcb, min_conn_int, max_conn_int, slave_latency, supervision_tout);
            }
            p_lcb->conn_update_mask &= ~L2C_BLE_NOT_DEFAULT_PARAM;
            p_lcb->conn_update_mask |=  L2C_BLE_NEW_CONN_PARAM;
         }
    }
    else
    {
        /* application allows to do update, if we were delaying one do it now */
        if (p_lcb->conn_update_mask & L2C_BLE_NEW_CONN_PARAM)
        {
             /* if both side 4.1, or we are master device, send HCI command */
            if (p_lcb->link_role == HCI_ROLE_MASTER
#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
                || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) &&
                    HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features))
#endif
                 )
            {
                btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, p_lcb->min_interval,
                    p_lcb->max_interval, p_lcb->latency, p_lcb->timeout, 0, 0);
                p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
            }
            else
            {
                l2cu_send_peer_ble_par_req (p_lcb, p_lcb->min_interval, p_lcb->max_interval,
                                            p_lcb->latency, p_lcb->timeout);
            }
            p_lcb->conn_update_mask &= ~L2C_BLE_NEW_CONN_PARAM;
            p_lcb->conn_update_mask |= L2C_BLE_NOT_DEFAULT_PARAM;
        }
    }
}

/*******************************************************************************
**
** Function         l2cble_process_conn_update_evt
**
** Description      This function enables the connection update request from remote
**                  after a successful connection update response is received.
**
** Returns          void
**
*******************************************************************************/
void l2cble_process_conn_update_evt (UINT16 handle, UINT8 status,
                  UINT16 interval, UINT16 latency, UINT16 timeout)
{
    L2CAP_TRACE_DEBUG("%s", __func__);

    /* See if we have a link control block for the remote device */
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle);
    if (!p_lcb)
    {
        L2CAP_TRACE_WARNING("%s: Invalid handle: %d", __func__, handle);
        return;
    }

    p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING;

    if (status != HCI_SUCCESS)
    {
        L2CAP_TRACE_WARNING("%s: Error status: %d", __func__, status);
    }

    l2cble_start_conn_update(p_lcb);

    L2CAP_TRACE_DEBUG("%s: conn_update_mask=%d", __func__, p_lcb->conn_update_mask);
}

/*******************************************************************************
**
** Function         l2cble_process_sig_cmd
**
** Description      This function is called when a signalling packet is received
**                  on the BLE signalling CID
**
** Returns          void
**
*******************************************************************************/
void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len)
{
    UINT8           *p_pkt_end;
    UINT8           cmd_code, id;
    UINT16          cmd_len;
    UINT16          min_interval, max_interval, latency, timeout;
    tL2C_CONN_INFO  con_info;
    UINT16          lcid = 0, rcid = 0, mtu = 0, mps = 0, initial_credit = 0;
    tL2C_CCB        *p_ccb = NULL, *temp_p_ccb = NULL;
    tL2C_RCB        *p_rcb;
    UINT16          credit;
    p_pkt_end = p + pkt_len;

    STREAM_TO_UINT8  (cmd_code, p);
    STREAM_TO_UINT8  (id, p);
    STREAM_TO_UINT16 (cmd_len, p);

    /* Check command length does not exceed packet length */
    if ((p + cmd_len) > p_pkt_end)
    {
        L2CAP_TRACE_WARNING ("L2CAP - LE - format error, pkt_len: %d  cmd_len: %d  code: %d", pkt_len, cmd_len, cmd_code);
        return;
    }

    switch (cmd_code)
    {
        case L2CAP_CMD_REJECT:
            p += 2;
            break;

        case L2CAP_CMD_ECHO_REQ:
        case L2CAP_CMD_ECHO_RSP:
        case L2CAP_CMD_INFO_RSP:
        case L2CAP_CMD_INFO_REQ:
            l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
            break;

        case L2CAP_CMD_BLE_UPDATE_REQ:
            STREAM_TO_UINT16 (min_interval, p); /* 0x0006 - 0x0C80 */
            STREAM_TO_UINT16 (max_interval, p); /* 0x0006 - 0x0C80 */
            STREAM_TO_UINT16 (latency, p);  /* 0x0000 - 0x03E8 */
            STREAM_TO_UINT16 (timeout, p);  /* 0x000A - 0x0C80 */
            /* If we are a master, the slave wants to update the parameters */
            if (p_lcb->link_role == HCI_ROLE_MASTER)
            {
                if (min_interval < BTM_BLE_CONN_INT_MIN_LIMIT)
                    min_interval = BTM_BLE_CONN_INT_MIN_LIMIT;

                if (min_interval < BTM_BLE_CONN_INT_MIN || min_interval > BTM_BLE_CONN_INT_MAX ||
                    max_interval < BTM_BLE_CONN_INT_MIN || max_interval > BTM_BLE_CONN_INT_MAX ||
                    latency  > BTM_BLE_CONN_LATENCY_MAX ||
                    /*(timeout >= max_interval && latency > (timeout * 10/(max_interval * 1.25) - 1)) ||*/
                    timeout < BTM_BLE_CONN_SUP_TOUT_MIN || timeout > BTM_BLE_CONN_SUP_TOUT_MAX ||
                    max_interval < min_interval)
                {
                    l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_UNACCEPTABLE_PARAMS, id);
                }
                else
                {

                    l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id);

                     p_lcb->min_interval = min_interval;
                     p_lcb->max_interval = max_interval;
                     p_lcb->latency = latency;
                     p_lcb->timeout = timeout;
                     p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;

                     l2cble_start_conn_update(p_lcb);
                }
            }
            else
                l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
            break;

        case L2CAP_CMD_BLE_UPDATE_RSP:
            p += 2;
            break;

        case L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ:
            STREAM_TO_UINT16 (con_info.psm, p);
            STREAM_TO_UINT16 (rcid, p);
            STREAM_TO_UINT16 (mtu, p);
            STREAM_TO_UINT16 (mps, p);
            STREAM_TO_UINT16 (initial_credit, p);

            L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ with "
                    "mtu = %d, "
                    "mps = %d, "
                    "initial credit = %d", mtu, mps, initial_credit);

            if ((p_rcb = l2cu_find_ble_rcb_by_psm (con_info.psm)) == NULL)
            {
                L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for unknown PSM: 0x%04x", con_info.psm);
                l2cu_reject_ble_connection (p_lcb, id, L2CAP_LE_NO_PSM);
                break;
            }
            else
            {
                if (!p_rcb->api.pL2CA_ConnectInd_Cb)
                {
                    L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for outgoing-only connection PSM: %d", con_info.psm);
                    l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_PSM);
                    break;
                }
            }

            /* Allocate a ccb for this.*/
            if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL)
            {
                L2CAP_TRACE_ERROR ("L2CAP - unable to allocate CCB");
                l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES);
                break;
            }

            /* validate the parameters */
            if (mtu < L2CAP_LE_MIN_MTU || mps < L2CAP_LE_MIN_MPS || mps > L2CAP_LE_MAX_MPS)
            {
                L2CAP_TRACE_ERROR ("L2CAP don't like the params");
                l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES);
                break;
            }

            p_ccb->remote_id = id;
            p_ccb->p_rcb = p_rcb;
            p_ccb->remote_cid = rcid;

            p_ccb->peer_conn_cfg.mtu = mtu;
            p_ccb->peer_conn_cfg.mps = mps;
            p_ccb->peer_conn_cfg.credits = initial_credit;

            p_ccb->tx_mps = mps;
            p_ccb->ble_sdu = NULL;
            p_ccb->ble_sdu_length = 0;
            p_ccb->is_first_seg = TRUE;
            p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE;

            l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_REQ, &con_info);
            break;

        case L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES:
            L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES");
            /* For all channels, see whose identifier matches this id */
            for (temp_p_ccb = p_lcb->ccb_queue.p_first_ccb; temp_p_ccb; temp_p_ccb = temp_p_ccb->p_next_ccb)
            {
                if (temp_p_ccb->local_id == id)
                {
                    p_ccb = temp_p_ccb;
                    break;
                }
            }
            if (p_ccb)
            {
                L2CAP_TRACE_DEBUG ("I remember the connection req");
                STREAM_TO_UINT16 (p_ccb->remote_cid, p);
                STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mtu, p);
                STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mps, p);
                STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.credits, p);
                STREAM_TO_UINT16 (con_info.l2cap_result, p);
                con_info.remote_cid = p_ccb->remote_cid;

                L2CAP_TRACE_DEBUG ("remote_cid = %d, "
                        "mtu = %d, "
                        "mps = %d, "
                        "initial_credit = %d, "
                        "con_info.l2cap_result = %d",
                        p_ccb->remote_cid, p_ccb->peer_conn_cfg.mtu, p_ccb->peer_conn_cfg.mps,
                        p_ccb->peer_conn_cfg.credits, con_info.l2cap_result);

                /* validate the parameters */
                if (p_ccb->peer_conn_cfg.mtu < L2CAP_LE_MIN_MTU ||
                        p_ccb->peer_conn_cfg.mps < L2CAP_LE_MIN_MPS ||
                        p_ccb->peer_conn_cfg.mps > L2CAP_LE_MAX_MPS)
                {
                    L2CAP_TRACE_ERROR ("L2CAP don't like the params");
                    con_info.l2cap_result = L2CAP_LE_NO_RESOURCES;
                    l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
                    break;
                }

                p_ccb->tx_mps = p_ccb->peer_conn_cfg.mps;
                p_ccb->ble_sdu = NULL;
                p_ccb->ble_sdu_length = 0;
                p_ccb->is_first_seg = TRUE;
                p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE;

                if (con_info.l2cap_result == L2CAP_LE_CONN_OK)
                    l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP, &con_info);
                else
                    l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
            }
            else
            {
                L2CAP_TRACE_DEBUG ("I DO NOT remember the connection req");
                con_info.l2cap_result = L2CAP_LE_INVALID_SOURCE_CID;
                l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
            }
            break;

        case L2CAP_CMD_BLE_FLOW_CTRL_CREDIT:
            STREAM_TO_UINT16(lcid, p);
            if((p_ccb = l2cu_find_ccb_by_remote_cid(p_lcb, lcid)) == NULL)
            {
                L2CAP_TRACE_DEBUG ("%s Credit received for unknown channel id %d", __func__, lcid);
                break;
            }

            STREAM_TO_UINT16(credit ,p);
            l2c_csm_execute(p_ccb, L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT, &credit);
            L2CAP_TRACE_DEBUG ("%s Credit received", __func__);
            break;

        case L2CAP_CMD_DISC_REQ:
            STREAM_TO_UINT16 (lcid, p);
            STREAM_TO_UINT16 (rcid, p);

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
            {
                if (p_ccb->remote_cid == rcid)
                {
                    p_ccb->remote_id = id;
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_REQ, NULL);
                }
            }
            else
                l2cu_send_peer_disc_rsp (p_lcb, id, lcid, rcid);

            break;

         case L2CAP_CMD_DISC_RSP:
            STREAM_TO_UINT16 (rcid, p);
            STREAM_TO_UINT16 (lcid, p);

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
            {
                if ((p_ccb->remote_cid == rcid) && (p_ccb->local_id == id))
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_RSP, NULL);
            }
            break;

        default:
            L2CAP_TRACE_WARNING ("L2CAP - LE - unknown cmd code: %d", cmd_code);
            l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
            break;
    }
}

/*******************************************************************************
**
** Function         l2cble_init_direct_conn
**
** Description      This function is to initate a direct connection
**
** Returns          TRUE connection initiated, FALSE otherwise.
**
*******************************************************************************/
BOOLEAN l2cble_init_direct_conn (tL2C_LCB *p_lcb)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_lcb->remote_bd_addr);
    tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
    UINT16 scan_int;
    UINT16 scan_win;
    BD_ADDR peer_addr;
    UINT8 peer_addr_type = BLE_ADDR_PUBLIC;
    UINT8 own_addr_type = BLE_ADDR_PUBLIC;

    /* There can be only one BLE connection request outstanding at a time */
    if (p_dev_rec == NULL)
    {
        L2CAP_TRACE_WARNING ("unknown device, can not initate connection");
        return(FALSE);
    }

    scan_int = (p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int;
    scan_win = (p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win;

    peer_addr_type = p_lcb->ble_addr_type;
    memcpy(peer_addr, p_lcb->remote_bd_addr, BD_ADDR_LEN);

#if ( (defined BLE_PRIVACY_SPT) && (BLE_PRIVACY_SPT == TRUE))
    own_addr_type = btm_cb.ble_ctr_cb.privacy_mode ? BLE_ADDR_RANDOM : BLE_ADDR_PUBLIC;
    if (p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT)
    {
        if (btm_cb.ble_ctr_cb.privacy_mode >=  BTM_PRIVACY_1_2)
            own_addr_type |= BLE_ADDR_TYPE_ID_BIT;

        btm_ble_enable_resolving_list(BTM_BLE_RL_INIT);
        btm_random_pseudo_to_identity_addr(peer_addr, &peer_addr_type);
    } else {
        btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, TRUE);

        // If we have a current RPA, use that instead.
        if (!bdaddr_is_empty((const bt_bdaddr_t *)p_dev_rec->ble.cur_rand_addr)) {
            memcpy(peer_addr, p_dev_rec->ble.cur_rand_addr, BD_ADDR_LEN);
        }
    }
#endif

    if (!btm_ble_topology_check(BTM_BLE_STATE_INIT))
    {
        l2cu_release_lcb (p_lcb);
        L2CAP_TRACE_ERROR("initate direct connection fail, topology limitation");
        return FALSE;
    }

    if (!btsnd_hcic_ble_create_ll_conn (scan_int,/* UINT16 scan_int      */
                                        scan_win, /* UINT16 scan_win      */
                                        FALSE,                   /* UINT8 white_list     */
                                        peer_addr_type,          /* UINT8 addr_type_peer */
                                        peer_addr,               /* BD_ADDR bda_peer     */
                                        own_addr_type,         /* UINT8 addr_type_own  */
        (UINT16) ((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ?
        p_dev_rec->conn_params.min_conn_int : BTM_BLE_CONN_INT_MIN_DEF),  /* UINT16 conn_int_min  */
        (UINT16) ((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ?
        p_dev_rec->conn_params.max_conn_int : BTM_BLE_CONN_INT_MAX_DEF),  /* UINT16 conn_int_max  */
        (UINT16) ((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ?
        p_dev_rec->conn_params.slave_latency : BTM_BLE_CONN_SLAVE_LATENCY_DEF), /* UINT16 conn_latency  */
        (UINT16) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ?
        p_dev_rec->conn_params.supervision_tout : BTM_BLE_CONN_TIMEOUT_DEF), /* conn_timeout */
                                        0,                       /* UINT16 min_len       */
                                        0))                      /* UINT16 max_len       */
    {
        l2cu_release_lcb (p_lcb);
        L2CAP_TRACE_ERROR("initate direct connection fail, no resources");
        return (FALSE);
    }
    else
    {
        p_lcb->link_state = LST_CONNECTING;
        l2cb.is_ble_connecting = TRUE;
        memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN);
        alarm_set_on_queue(p_lcb->l2c_lcb_timer,
                           L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS,
                           l2c_lcb_timer_timeout, p_lcb,
                           btu_general_alarm_queue);
        btm_ble_set_conn_st (BLE_DIR_CONN);

        return (TRUE);
    }
}

/*******************************************************************************
**
** Function         l2cble_create_conn
**
** Description      This function initiates an acl connection via HCI
**
** Returns          TRUE if successful, FALSE if connection not started.
**
*******************************************************************************/
BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb)
{
    tBTM_BLE_CONN_ST     conn_st = btm_ble_get_conn_st();
    BOOLEAN         rt = FALSE;

    /* There can be only one BLE connection request outstanding at a time */
    if (conn_st == BLE_CONN_IDLE)
    {
        rt = l2cble_init_direct_conn(p_lcb);
    }
    else
    {
        L2CAP_TRACE_WARNING ("L2CAP - LE - cannot start new connection at conn st: %d", conn_st);

        btm_ble_enqueue_direct_conn_req(p_lcb);

        if (conn_st == BLE_BG_CONN)
            btm_ble_suspend_bg_conn();

        rt = TRUE;
    }
    return rt;
}

/*******************************************************************************
**
** Function         l2c_link_processs_ble_num_bufs
**
** Description      This function is called when a "controller buffer size"
**                  event is first received from the controller. It updates
**                  the L2CAP values.
**
** Returns          void
**
*******************************************************************************/
void l2c_link_processs_ble_num_bufs (UINT16 num_lm_ble_bufs)
{
    if (num_lm_ble_bufs == 0)
    {
        num_lm_ble_bufs = L2C_DEF_NUM_BLE_BUF_SHARED;
        l2cb.num_lm_acl_bufs -= L2C_DEF_NUM_BLE_BUF_SHARED;
    }

    l2cb.num_lm_ble_bufs = l2cb.controller_le_xmit_window = num_lm_ble_bufs;
}

/*******************************************************************************
**
** Function         l2c_ble_link_adjust_allocation
**
** Description      This function is called when a link is created or removed
**                  to calculate the amount of packets each link may send to
**                  the HCI without an ack coming back.
**
**                  Currently, this is a simple allocation, dividing the
**                  number of Controller Packets by the number of links. In
**                  the future, QOS configuration should be examined.
**
** Returns          void
**
*******************************************************************************/
void l2c_ble_link_adjust_allocation (void)
{
    UINT16      qq, yy, qq_remainder;
    tL2C_LCB    *p_lcb;
    UINT16      hi_quota, low_quota;
    UINT16      num_lowpri_links = 0;
    UINT16      num_hipri_links  = 0;
    UINT16      controller_xmit_quota = l2cb.num_lm_ble_bufs;
    UINT16      high_pri_link_quota = L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A;

    /* If no links active, reset buffer quotas and controller buffers */
    if (l2cb.num_ble_links_active == 0)
    {
        l2cb.controller_le_xmit_window = l2cb.num_lm_ble_bufs;
        l2cb.ble_round_robin_quota = l2cb.ble_round_robin_unacked = 0;
        return;
    }

    /* First, count the links */
    for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++)
    {
        if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE)
        {
            if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH)
                num_hipri_links++;
            else
                num_lowpri_links++;
        }
    }

    /* now adjust high priority link quota */
    low_quota = num_lowpri_links ? 1 : 0;
    while ( (num_hipri_links * high_pri_link_quota + low_quota) > controller_xmit_quota )
        high_pri_link_quota--;


    /* Work out the xmit quota and buffer quota high and low priorities */
    hi_quota  = num_hipri_links * high_pri_link_quota;
    low_quota = (hi_quota < controller_xmit_quota) ? controller_xmit_quota - hi_quota : 1;

    /* Work out and save the HCI xmit quota for each low priority link */

    /* If each low priority link cannot have at least one buffer */
    if (num_lowpri_links > low_quota)
    {
        l2cb.ble_round_robin_quota = low_quota;
        qq = qq_remainder = 0;
    }
    /* If each low priority link can have at least one buffer */
    else if (num_lowpri_links > 0)
    {
        l2cb.ble_round_robin_quota = 0;
        l2cb.ble_round_robin_unacked = 0;
        qq = low_quota / num_lowpri_links;
        qq_remainder = low_quota % num_lowpri_links;
    }
    /* If no low priority link */
    else
    {
        l2cb.ble_round_robin_quota = 0;
        l2cb.ble_round_robin_unacked = 0;
        qq = qq_remainder = 0;
    }
    L2CAP_TRACE_EVENT ("l2c_ble_link_adjust_allocation  num_hipri: %u  num_lowpri: %u  low_quota: %u  round_robin_quota: %u  qq: %u",
                        num_hipri_links, num_lowpri_links, low_quota,
                        l2cb.ble_round_robin_quota, qq);

    /* Now, assign the quotas to each link */
    for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++)
    {
        if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE)
        {
            if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH)
            {
                p_lcb->link_xmit_quota   = high_pri_link_quota;
            }
            else
            {
                /* Safety check in case we switched to round-robin with something outstanding */
                /* if sent_not_acked is added into round_robin_unacked then don't add it again */
                /* l2cap keeps updating sent_not_acked for exiting from round robin */
                if (( p_lcb->link_xmit_quota > 0 )&&( qq == 0 ))
                    l2cb.ble_round_robin_unacked += p_lcb->sent_not_acked;

                p_lcb->link_xmit_quota   = qq;
                if (qq_remainder > 0)
                {
                    p_lcb->link_xmit_quota++;
                    qq_remainder--;
                }
            }

            L2CAP_TRACE_EVENT("l2c_ble_link_adjust_allocation LCB %d   Priority: %d  XmitQuota: %d",
                                yy, p_lcb->acl_priority, p_lcb->link_xmit_quota);

            L2CAP_TRACE_EVENT("        SentNotAcked: %d  RRUnacked: %d",
                                p_lcb->sent_not_acked, l2cb.round_robin_unacked);

            /* There is a special case where we have readjusted the link quotas and  */
            /* this link may have sent anything but some other link sent packets so  */
            /* so we may need a timer to kick off this link's transmissions.         */
            if ( (p_lcb->link_state == LST_CONNECTED)
              && (!list_is_empty(p_lcb->link_xmit_data_q))
                 && (p_lcb->sent_not_acked < p_lcb->link_xmit_quota) ) {
                alarm_set_on_queue(p_lcb->l2c_lcb_timer,
                                   L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS,
                                   l2c_lcb_timer_timeout, p_lcb,
                                   btu_general_alarm_queue);
            }
        }
    }
}

#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function         l2cble_process_rc_param_request_evt
**
** Description      process LE Remote Connection Parameter Request Event.
**
** Returns          void
**
*******************************************************************************/
void l2cble_process_rc_param_request_evt(UINT16 handle, UINT16 int_min, UINT16 int_max,
                                     UINT16 latency, UINT16 timeout)
{
    tL2C_LCB    *p_lcb = l2cu_find_lcb_by_handle (handle);

    if (p_lcb != NULL)
    {
        p_lcb->min_interval = int_min;
        p_lcb->max_interval = int_max;
        p_lcb->latency = latency;
        p_lcb->timeout = timeout;

        /* if update is enabled, always accept connection parameter update */
        if ((p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0)
        {
            btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, 0, 0);
        }
        else
        {
            L2CAP_TRACE_EVENT ("L2CAP - LE - update currently disabled");
            p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
            btsnd_hcic_ble_rc_param_req_neg_reply (handle,HCI_ERR_UNACCEPT_CONN_INTERVAL);
        }

    }
    else
    {
        L2CAP_TRACE_WARNING("No link to update connection parameter")
    }
}
#endif

/*******************************************************************************
**
** Function         l2cble_update_data_length
**
** Description      This function update link tx data length if applicable
**
** Returns          void
**
*******************************************************************************/
void l2cble_update_data_length(tL2C_LCB *p_lcb)
{
    UINT16 tx_mtu = 0;
    UINT16 i = 0;

    L2CAP_TRACE_DEBUG("%s", __FUNCTION__);

    /* See if we have a link control block for the connection */
    if (p_lcb == NULL)
        return;

    for (i = 0; i < L2CAP_NUM_FIXED_CHNLS; i++)
    {
        if (i + L2CAP_FIRST_FIXED_CHNL != L2CAP_BLE_SIGNALLING_CID)
        {
            if ((p_lcb->p_fixed_ccbs[i] != NULL) &&
                    (tx_mtu < (p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD)))
                tx_mtu = p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD;
        }
    }

    if (tx_mtu > BTM_BLE_DATA_SIZE_MAX)
        tx_mtu = BTM_BLE_DATA_SIZE_MAX;

    /* update TX data length if changed */
    if (p_lcb->tx_data_len != tx_mtu)
        BTM_SetBleDataLength(p_lcb->remote_bd_addr, tx_mtu);

}

/*******************************************************************************
**
** Function         l2cble_process_data_length_change_evt
**
** Description      This function process the data length change event
**
** Returns          void
**
*******************************************************************************/
void l2cble_process_data_length_change_event(UINT16 handle, UINT16 tx_data_len, UINT16 rx_data_len)
{
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle);

    L2CAP_TRACE_DEBUG("%s TX data len = %d", __FUNCTION__, tx_data_len);
    if (p_lcb == NULL)
        return;

    if (tx_data_len > 0)
        p_lcb->tx_data_len = tx_data_len;

    /* ignore rx_data len for now */
}

/*******************************************************************************
**
** Function         l2cble_set_fixed_channel_tx_data_length
**
** Description      This function update max fixed channel tx data length if applicable
**
** Returns          void
**
*******************************************************************************/
void l2cble_set_fixed_channel_tx_data_length(BD_ADDR remote_bda, UINT16 fix_cid, UINT16 tx_mtu)
{
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(remote_bda, BT_TRANSPORT_LE);
    UINT16 cid = fix_cid - L2CAP_FIRST_FIXED_CHNL;

    L2CAP_TRACE_DEBUG("%s TX MTU = %d", __FUNCTION__, tx_mtu);

    if (!controller_get_interface()->supports_ble_packet_extension())
    {
        L2CAP_TRACE_WARNING("%s, request not supported", __FUNCTION__);
        return;
    }

    /* See if we have a link control block for the connection */
    if (p_lcb == NULL)
        return;

    if (p_lcb->p_fixed_ccbs[cid] != NULL)
    {
        if (tx_mtu > BTM_BLE_DATA_SIZE_MAX)
            tx_mtu = BTM_BLE_DATA_SIZE_MAX;

        p_lcb->p_fixed_ccbs[cid]->tx_data_len = tx_mtu;
    }

    l2cble_update_data_length(p_lcb);
}

/*******************************************************************************
**
** Function         l2cble_credit_based_conn_req
**
** Description      This function sends LE Credit Based Connection Request for
**                  LE connection oriented channels.
**
** Returns          void
**
*******************************************************************************/
void l2cble_credit_based_conn_req (tL2C_CCB *p_ccb)
{
    if (!p_ccb)
        return;

    if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
    {
        L2CAP_TRACE_WARNING ("LE link doesn't exist");
        return;
    }

    l2cu_send_peer_ble_credit_based_conn_req (p_ccb);
    return;
}

/*******************************************************************************
**
** Function         l2cble_credit_based_conn_res
**
** Description      This function sends LE Credit Based Connection Response for
**                  LE connection oriented channels.
**
** Returns          void
**
*******************************************************************************/
void l2cble_credit_based_conn_res (tL2C_CCB *p_ccb, UINT16 result)
{
    if (!p_ccb)
        return;

    if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
    {
        L2CAP_TRACE_WARNING ("LE link doesn't exist");
        return;
    }

    l2cu_send_peer_ble_credit_based_conn_res (p_ccb, result);
    return;
}

/*******************************************************************************
**
** Function         l2cble_send_flow_control_credit
**
** Description      This function sends flow control credits for
**                  LE connection oriented channels.
**
** Returns          void
**
*******************************************************************************/
void l2cble_send_flow_control_credit(tL2C_CCB *p_ccb, UINT16 credit_value)
{
    if (!p_ccb)
        return;

    if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
    {
        L2CAP_TRACE_WARNING ("LE link doesn't exist");
        return;
    }

    l2cu_send_peer_ble_flow_control_credit(p_ccb, credit_value);
    return;

}

/*******************************************************************************
**
** Function         l2cble_send_peer_disc_req
**
** Description      This function sends disconnect request
**                  to the peer LE device
**
** Returns          void
**
*******************************************************************************/
void l2cble_send_peer_disc_req(tL2C_CCB *p_ccb)
{
    L2CAP_TRACE_DEBUG ("%s",__func__);
    if (!p_ccb)
        return;

    if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
    {
        L2CAP_TRACE_WARNING ("LE link doesn't exist");
        return;
    }

    l2cu_send_peer_ble_credit_based_disconn_req(p_ccb);
    return;
}

/*******************************************************************************
**
** Function         l2cble_sec_comp
**
** Description      This function is called when security procedure for an LE COC
**                  link is done
**
** Returns          void
**
*******************************************************************************/
void  l2cble_sec_comp(BD_ADDR p_bda, tBT_TRANSPORT transport, void *p_ref_data, UINT8 status)
{
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_bda, BT_TRANSPORT_LE);
    tL2CAP_SEC_DATA *p_buf = NULL;
    UINT8 sec_flag;
    UINT8 sec_act;

    if (!p_lcb)
    {
        L2CAP_TRACE_WARNING ("%s security complete for unknown device", __func__);
        return;
    }

    sec_act = p_lcb->sec_act;
    p_lcb->sec_act = 0;

    if (!fixed_queue_is_empty(p_lcb->le_sec_pending_q))
    {
        p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q);
        if (!p_buf)
        {
            L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP",
                    __func__);
            return;
        }

        if (status != BTM_SUCCESS)
        {
            (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
        }
        else
        {
            if (sec_act == BTM_SEC_ENCRYPT_MITM)
            {
                BTM_GetSecurityFlagsByTransport(p_bda, &sec_flag, transport);
                if (sec_flag & BTM_SEC_FLAG_LKEY_AUTHED)
                    (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
                else
                {
                    L2CAP_TRACE_DEBUG ("%s MITM Protection Not present", __func__);
                    (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data,
                            BTM_FAILED_ON_SECURITY);
                }
            }
            else
            {
                L2CAP_TRACE_DEBUG ("%s MITM Protection not required sec_act = %d",
                        __func__, p_lcb->sec_act);

                (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
            }
        }
    }
    else
    {
        L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP", __func__);
        return;
    }
    osi_free(p_buf);

    while (!fixed_queue_is_empty(p_lcb->le_sec_pending_q))
    {
        p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q);

        if (status != BTM_SUCCESS)
            (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
        else
            l2ble_sec_access_req(p_bda, p_buf->psm, p_buf->is_originator,
                    p_buf->p_callback, p_buf->p_ref_data);

       osi_free(p_buf);
    }
}

/*******************************************************************************
**
** Function         l2ble_sec_access_req
**
** Description      This function is called by LE COC link to meet the
**                  security requirement for the link
**
** Returns          TRUE - security procedures are started
**                  FALSE - failure
**
*******************************************************************************/
BOOLEAN l2ble_sec_access_req(BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_originator, tL2CAP_SEC_CBACK *p_callback, void *p_ref_data)
{
    L2CAP_TRACE_DEBUG ("%s", __func__);
    BOOLEAN status;
    tL2C_LCB *p_lcb = NULL;

    if (!p_callback)
    {
        L2CAP_TRACE_ERROR("%s No callback function", __func__);
        return FALSE;
    }

    p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_LE);

    if (!p_lcb)
    {
        L2CAP_TRACE_ERROR ("%s Security check for unknown device", __func__);
        p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_UNKNOWN_ADDR);
        return FALSE;
    }

    tL2CAP_SEC_DATA *p_buf = (tL2CAP_SEC_DATA*) osi_malloc((UINT16)sizeof(tL2CAP_SEC_DATA));
    if (!p_buf)
    {
        p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_NO_RESOURCES);
        return FALSE;
    }

    p_buf->psm = psm;
    p_buf->is_originator = is_originator;
    p_buf->p_callback = p_callback;
    p_buf->p_ref_data = p_ref_data;
    fixed_queue_enqueue(p_lcb->le_sec_pending_q, p_buf);
    status = btm_ble_start_sec_check(bd_addr, psm, is_originator, &l2cble_sec_comp, p_ref_data);

    return status;
}
#endif /* (BLE_INCLUDED == TRUE) */