net/bluetooth/hci_event.c

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
   4
   5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation;
  10
  11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  22    SOFTWARE IS DISCLAIMED.
  23 */
  24
  25 /* Bluetooth HCI event handling. */
  26
  27 #include <asm/unaligned.h>
  28
  29 #include <net/bluetooth/bluetooth.h>
  30 #include <net/bluetooth/hci_core.h>
  31 #include <net/bluetooth/mgmt.h>
  32
  33 #include "hci_request.h"
  34 #include "hci_debugfs.h"
  35 #include "a2mp.h"
  36 #include "amp.h"
  37 #include "smp.h"
  38
  39 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
  40                  "\x00\x00\x00\x00\x00\x00\x00\x00"
  41
  42 /* Handle HCI Event packets */
  43
  44 static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb)
  45 {
  46         __u8 status = *((__u8 *) skb->data);
  47
  48         BT_DBG("%s status 0x%2.2x", hdev->name, status);
  49
  50         if (status)
  51                 return;
  52
  53         clear_bit(HCI_INQUIRY, &hdev->flags);
  54         smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
  55         wake_up_bit(&hdev->flags, HCI_INQUIRY);
  56
  57         hci_dev_lock(hdev);
  58         /* Set discovery state to stopped if we're not doing LE active
  59          * scanning.
  60          */
  61         if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
  62             hdev->le_scan_type != LE_SCAN_ACTIVE)
  63                 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
  64         hci_dev_unlock(hdev);
  65
  66         hci_conn_check_pending(hdev);
  67 }
  68
  69 static void hci_cc_periodic_inq(struct hci_dev *hdev, struct sk_buff *skb)
  70 {
  71         __u8 status = *((__u8 *) skb->data);
  72
  73         BT_DBG("%s status 0x%2.2x", hdev->name, status);
  74
  75         if (status)
  76                 return;
  77
  78         hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
  79 }
  80
  81 static void hci_cc_exit_periodic_inq(struct hci_dev *hdev, struct sk_buff *skb)
  82 {
  83         __u8 status = *((__u8 *) skb->data);
  84
  85         BT_DBG("%s status 0x%2.2x", hdev->name, status);
  86
  87         if (status)
  88                 return;
  89
  90         hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
  91
  92         hci_conn_check_pending(hdev);
  93 }
  94
  95 static void hci_cc_remote_name_req_cancel(struct hci_dev *hdev,
  96                                           struct sk_buff *skb)
  97 {
  98         BT_DBG("%s", hdev->name);
  99 }
 100
 101 static void hci_cc_role_discovery(struct hci_dev *hdev, struct sk_buff *skb)
 102 {
 103         struct hci_rp_role_discovery *rp = (void *) skb->data;
 104         struct hci_conn *conn;
 105
 106         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 107
 108         if (rp->status)
 109                 return;
 110
 111         hci_dev_lock(hdev);
 112
 113         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 114         if (conn)
 115                 conn->role = rp->role;
 116
 117         hci_dev_unlock(hdev);
 118 }
 119
 120 static void hci_cc_read_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
 121 {
 122         struct hci_rp_read_link_policy *rp = (void *) skb->data;
 123         struct hci_conn *conn;
 124
 125         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 126
 127         if (rp->status)
 128                 return;
 129
 130         hci_dev_lock(hdev);
 131
 132         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 133         if (conn)
 134                 conn->link_policy = __le16_to_cpu(rp->policy);
 135
 136         hci_dev_unlock(hdev);
 137 }
 138
 139 static void hci_cc_write_link_policy(struct hci_dev *hdev, struct sk_buff *skb)
 140 {
 141         struct hci_rp_write_link_policy *rp = (void *) skb->data;
 142         struct hci_conn *conn;
 143         void *sent;
 144
 145         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 146
 147         if (rp->status)
 148                 return;
 149
 150         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
 151         if (!sent)
 152                 return;
 153
 154         hci_dev_lock(hdev);
 155
 156         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 157         if (conn)
 158                 conn->link_policy = get_unaligned_le16(sent + 2);
 159
 160         hci_dev_unlock(hdev);
 161 }
 162
 163 static void hci_cc_read_def_link_policy(struct hci_dev *hdev,
 164                                         struct sk_buff *skb)
 165 {
 166         struct hci_rp_read_def_link_policy *rp = (void *) skb->data;
 167
 168         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 169
 170         if (rp->status)
 171                 return;
 172
 173         hdev->link_policy = __le16_to_cpu(rp->policy);
 174 }
 175
 176 static void hci_cc_write_def_link_policy(struct hci_dev *hdev,
 177                                          struct sk_buff *skb)
 178 {
 179         __u8 status = *((__u8 *) skb->data);
 180         void *sent;
 181
 182         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 183
 184         if (status)
 185                 return;
 186
 187         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
 188         if (!sent)
 189                 return;
 190
 191         hdev->link_policy = get_unaligned_le16(sent);
 192 }
 193
 194 static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 195 {
 196         __u8 status = *((__u8 *) skb->data);
 197
 198         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 199
 200         clear_bit(HCI_RESET, &hdev->flags);
 201
 202         if (status)
 203                 return;
 204
 205         /* Reset all non-persistent flags */
 206         hci_dev_clear_volatile_flags(hdev);
 207
 208         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
 209
 210         hdev->inq_tx_power = HCI_TX_POWER_INVALID;
 211         hdev->adv_tx_power = HCI_TX_POWER_INVALID;
 212
 213         memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
 214         hdev->adv_data_len = 0;
 215
 216         memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
 217         hdev->scan_rsp_data_len = 0;
 218
 219         hdev->le_scan_type = LE_SCAN_PASSIVE;
 220
 221         hdev->ssp_debug_mode = 0;
 222
 223         hci_bdaddr_list_clear(&hdev->le_white_list);
 224         hci_bdaddr_list_clear(&hdev->le_resolv_list);
 225 }
 226
 227 static void hci_cc_read_stored_link_key(struct hci_dev *hdev,
 228                                         struct sk_buff *skb)
 229 {
 230         struct hci_rp_read_stored_link_key *rp = (void *)skb->data;
 231         struct hci_cp_read_stored_link_key *sent;
 232
 233         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 234
 235         sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
 236         if (!sent)
 237                 return;
 238
 239         if (!rp->status && sent->read_all == 0x01) {
 240                 hdev->stored_max_keys = rp->max_keys;
 241                 hdev->stored_num_keys = rp->num_keys;
 242         }
 243 }
 244
 245 static void hci_cc_delete_stored_link_key(struct hci_dev *hdev,
 246                                           struct sk_buff *skb)
 247 {
 248         struct hci_rp_delete_stored_link_key *rp = (void *)skb->data;
 249
 250         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 251
 252         if (rp->status)
 253                 return;
 254
 255         if (rp->num_keys <= hdev->stored_num_keys)
 256                 hdev->stored_num_keys -= rp->num_keys;
 257         else
 258                 hdev->stored_num_keys = 0;
 259 }
 260
 261 static void hci_cc_write_local_name(struct hci_dev *hdev, struct sk_buff *skb)
 262 {
 263         __u8 status = *((__u8 *) skb->data);
 264         void *sent;
 265
 266         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 267
 268         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
 269         if (!sent)
 270                 return;
 271
 272         hci_dev_lock(hdev);
 273
 274         if (hci_dev_test_flag(hdev, HCI_MGMT))
 275                 mgmt_set_local_name_complete(hdev, sent, status);
 276         else if (!status)
 277                 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
 278
 279         hci_dev_unlock(hdev);
 280 }
 281
 282 static void hci_cc_read_local_name(struct hci_dev *hdev, struct sk_buff *skb)
 283 {
 284         struct hci_rp_read_local_name *rp = (void *) skb->data;
 285
 286         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 287
 288         if (rp->status)
 289                 return;
 290
 291         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 292             hci_dev_test_flag(hdev, HCI_CONFIG))
 293                 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
 294 }
 295
 296 static void hci_cc_write_auth_enable(struct hci_dev *hdev, struct sk_buff *skb)
 297 {
 298         __u8 status = *((__u8 *) skb->data);
 299         void *sent;
 300
 301         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 302
 303         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
 304         if (!sent)
 305                 return;
 306
 307         hci_dev_lock(hdev);
 308
 309         if (!status) {
 310                 __u8 param = *((__u8 *) sent);
 311
 312                 if (param == AUTH_ENABLED)
 313                         set_bit(HCI_AUTH, &hdev->flags);
 314                 else
 315                         clear_bit(HCI_AUTH, &hdev->flags);
 316         }
 317
 318         if (hci_dev_test_flag(hdev, HCI_MGMT))
 319                 mgmt_auth_enable_complete(hdev, status);
 320
 321         hci_dev_unlock(hdev);
 322 }
 323
 324 static void hci_cc_write_encrypt_mode(struct hci_dev *hdev, struct sk_buff *skb)
 325 {
 326         __u8 status = *((__u8 *) skb->data);
 327         __u8 param;
 328         void *sent;
 329
 330         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 331
 332         if (status)
 333                 return;
 334
 335         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
 336         if (!sent)
 337                 return;
 338
 339         param = *((__u8 *) sent);
 340
 341         if (param)
 342                 set_bit(HCI_ENCRYPT, &hdev->flags);
 343         else
 344                 clear_bit(HCI_ENCRYPT, &hdev->flags);
 345 }
 346
 347 static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
 348 {
 349         __u8 status = *((__u8 *) skb->data);
 350         __u8 param;
 351         void *sent;
 352
 353         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 354
 355         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
 356         if (!sent)
 357                 return;
 358
 359         param = *((__u8 *) sent);
 360
 361         hci_dev_lock(hdev);
 362
 363         if (status) {
 364                 hdev->discov_timeout = 0;
 365                 goto done;
 366         }
 367
 368         if (param & SCAN_INQUIRY)
 369                 set_bit(HCI_ISCAN, &hdev->flags);
 370         else
 371                 clear_bit(HCI_ISCAN, &hdev->flags);
 372
 373         if (param & SCAN_PAGE)
 374                 set_bit(HCI_PSCAN, &hdev->flags);
 375         else
 376                 clear_bit(HCI_PSCAN, &hdev->flags);
 377
 378 done:
 379         hci_dev_unlock(hdev);
 380 }
 381
 382 static void hci_cc_read_class_of_dev(struct hci_dev *hdev, struct sk_buff *skb)
 383 {
 384         struct hci_rp_read_class_of_dev *rp = (void *) skb->data;
 385
 386         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 387
 388         if (rp->status)
 389                 return;
 390
 391         memcpy(hdev->dev_class, rp->dev_class, 3);
 392
 393         BT_DBG("%s class 0x%.2x%.2x%.2x", hdev->name,
 394                hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
 395 }
 396
 397 static void hci_cc_write_class_of_dev(struct hci_dev *hdev, struct sk_buff *skb)
 398 {
 399         __u8 status = *((__u8 *) skb->data);
 400         void *sent;
 401
 402         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 403
 404         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
 405         if (!sent)
 406                 return;
 407
 408         hci_dev_lock(hdev);
 409
 410         if (status == 0)
 411                 memcpy(hdev->dev_class, sent, 3);
 412
 413         if (hci_dev_test_flag(hdev, HCI_MGMT))
 414                 mgmt_set_class_of_dev_complete(hdev, sent, status);
 415
 416         hci_dev_unlock(hdev);
 417 }
 418
 419 static void hci_cc_read_voice_setting(struct hci_dev *hdev, struct sk_buff *skb)
 420 {
 421         struct hci_rp_read_voice_setting *rp = (void *) skb->data;
 422         __u16 setting;
 423
 424         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 425
 426         if (rp->status)
 427                 return;
 428
 429         setting = __le16_to_cpu(rp->voice_setting);
 430
 431         if (hdev->voice_setting == setting)
 432                 return;
 433
 434         hdev->voice_setting = setting;
 435
 436         BT_DBG("%s voice setting 0x%4.4x", hdev->name, setting);
 437
 438         if (hdev->notify)
 439                 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
 440 }
 441
 442 static void hci_cc_write_voice_setting(struct hci_dev *hdev,
 443                                        struct sk_buff *skb)
 444 {
 445         __u8 status = *((__u8 *) skb->data);
 446         __u16 setting;
 447         void *sent;
 448
 449         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 450
 451         if (status)
 452                 return;
 453
 454         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
 455         if (!sent)
 456                 return;
 457
 458         setting = get_unaligned_le16(sent);
 459
 460         if (hdev->voice_setting == setting)
 461                 return;
 462
 463         hdev->voice_setting = setting;
 464
 465         BT_DBG("%s voice setting 0x%4.4x", hdev->name, setting);
 466
 467         if (hdev->notify)
 468                 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
 469 }
 470
 471 static void hci_cc_read_num_supported_iac(struct hci_dev *hdev,
 472                                           struct sk_buff *skb)
 473 {
 474         struct hci_rp_read_num_supported_iac *rp = (void *) skb->data;
 475
 476         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 477
 478         if (rp->status)
 479                 return;
 480
 481         hdev->num_iac = rp->num_iac;
 482
 483         BT_DBG("%s num iac %d", hdev->name, hdev->num_iac);
 484 }
 485
 486 static void hci_cc_write_ssp_mode(struct hci_dev *hdev, struct sk_buff *skb)
 487 {
 488         __u8 status = *((__u8 *) skb->data);
 489         struct hci_cp_write_ssp_mode *sent;
 490
 491         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 492
 493         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
 494         if (!sent)
 495                 return;
 496
 497         hci_dev_lock(hdev);
 498
 499         if (!status) {
 500                 if (sent->mode)
 501                         hdev->features[1][0] |= LMP_HOST_SSP;
 502                 else
 503                         hdev->features[1][0] &= ~LMP_HOST_SSP;
 504         }
 505
 506         if (hci_dev_test_flag(hdev, HCI_MGMT))
 507                 mgmt_ssp_enable_complete(hdev, sent->mode, status);
 508         else if (!status) {
 509                 if (sent->mode)
 510                         hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
 511                 else
 512                         hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
 513         }
 514
 515         hci_dev_unlock(hdev);
 516 }
 517
 518 static void hci_cc_write_sc_support(struct hci_dev *hdev, struct sk_buff *skb)
 519 {
 520         u8 status = *((u8 *) skb->data);
 521         struct hci_cp_write_sc_support *sent;
 522
 523         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 524
 525         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
 526         if (!sent)
 527                 return;
 528
 529         hci_dev_lock(hdev);
 530
 531         if (!status) {
 532                 if (sent->support)
 533                         hdev->features[1][0] |= LMP_HOST_SC;
 534                 else
 535                         hdev->features[1][0] &= ~LMP_HOST_SC;
 536         }
 537
 538         if (!hci_dev_test_flag(hdev, HCI_MGMT) && !status) {
 539                 if (sent->support)
 540                         hci_dev_set_flag(hdev, HCI_SC_ENABLED);
 541                 else
 542                         hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
 543         }
 544
 545         hci_dev_unlock(hdev);
 546 }
 547
 548 static void hci_cc_read_local_version(struct hci_dev *hdev, struct sk_buff *skb)
 549 {
 550         struct hci_rp_read_local_version *rp = (void *) skb->data;
 551
 552         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 553
 554         if (rp->status)
 555                 return;
 556
 557         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 558             hci_dev_test_flag(hdev, HCI_CONFIG)) {
 559                 hdev->hci_ver = rp->hci_ver;
 560                 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
 561                 hdev->lmp_ver = rp->lmp_ver;
 562                 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
 563                 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
 564         }
 565 }
 566
 567 static void hci_cc_read_local_commands(struct hci_dev *hdev,
 568                                        struct sk_buff *skb)
 569 {
 570         struct hci_rp_read_local_commands *rp = (void *) skb->data;
 571
 572         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 573
 574         if (rp->status)
 575                 return;
 576
 577         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 578             hci_dev_test_flag(hdev, HCI_CONFIG))
 579                 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
 580 }
 581
 582 static void hci_cc_read_local_features(struct hci_dev *hdev,
 583                                        struct sk_buff *skb)
 584 {
 585         struct hci_rp_read_local_features *rp = (void *) skb->data;
 586
 587         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 588
 589         if (rp->status)
 590                 return;
 591
 592         memcpy(hdev->features, rp->features, 8);
 593
 594         /* Adjust default settings according to features
 595          * supported by device. */
 596
 597         if (hdev->features[0][0] & LMP_3SLOT)
 598                 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
 599
 600         if (hdev->features[0][0] & LMP_5SLOT)
 601                 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
 602
 603         if (hdev->features[0][1] & LMP_HV2) {
 604                 hdev->pkt_type  |= (HCI_HV2);
 605                 hdev->esco_type |= (ESCO_HV2);
 606         }
 607
 608         if (hdev->features[0][1] & LMP_HV3) {
 609                 hdev->pkt_type  |= (HCI_HV3);
 610                 hdev->esco_type |= (ESCO_HV3);
 611         }
 612
 613         if (lmp_esco_capable(hdev))
 614                 hdev->esco_type |= (ESCO_EV3);
 615
 616         if (hdev->features[0][4] & LMP_EV4)
 617                 hdev->esco_type |= (ESCO_EV4);
 618
 619         if (hdev->features[0][4] & LMP_EV5)
 620                 hdev->esco_type |= (ESCO_EV5);
 621
 622         if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
 623                 hdev->esco_type |= (ESCO_2EV3);
 624
 625         if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
 626                 hdev->esco_type |= (ESCO_3EV3);
 627
 628         if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
 629                 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
 630 }
 631
 632 static void hci_cc_read_local_ext_features(struct hci_dev *hdev,
 633                                            struct sk_buff *skb)
 634 {
 635         struct hci_rp_read_local_ext_features *rp = (void *) skb->data;
 636
 637         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 638
 639         if (rp->status)
 640                 return;
 641
 642         if (hdev->max_page < rp->max_page)
 643                 hdev->max_page = rp->max_page;
 644
 645         if (rp->page < HCI_MAX_PAGES)
 646                 memcpy(hdev->features[rp->page], rp->features, 8);
 647 }
 648
 649 static void hci_cc_read_flow_control_mode(struct hci_dev *hdev,
 650                                           struct sk_buff *skb)
 651 {
 652         struct hci_rp_read_flow_control_mode *rp = (void *) skb->data;
 653
 654         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 655
 656         if (rp->status)
 657                 return;
 658
 659         hdev->flow_ctl_mode = rp->mode;
 660 }
 661
 662 static void hci_cc_read_buffer_size(struct hci_dev *hdev, struct sk_buff *skb)
 663 {
 664         struct hci_rp_read_buffer_size *rp = (void *) skb->data;
 665
 666         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 667
 668         if (rp->status)
 669                 return;
 670
 671         hdev->acl_mtu  = __le16_to_cpu(rp->acl_mtu);
 672         hdev->sco_mtu  = rp->sco_mtu;
 673         hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
 674         hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
 675
 676         if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
 677                 hdev->sco_mtu  = 64;
 678                 hdev->sco_pkts = 8;
 679         }
 680
 681         hdev->acl_cnt = hdev->acl_pkts;
 682         hdev->sco_cnt = hdev->sco_pkts;
 683
 684         BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
 685                hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
 686 }
 687
 688 static void hci_cc_read_bd_addr(struct hci_dev *hdev, struct sk_buff *skb)
 689 {
 690         struct hci_rp_read_bd_addr *rp = (void *) skb->data;
 691
 692         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 693
 694         if (rp->status)
 695                 return;
 696
 697         if (test_bit(HCI_INIT, &hdev->flags))
 698                 bacpy(&hdev->bdaddr, &rp->bdaddr);
 699
 700         if (hci_dev_test_flag(hdev, HCI_SETUP))
 701                 bacpy(&hdev->setup_addr, &rp->bdaddr);
 702 }
 703
 704 static void hci_cc_read_page_scan_activity(struct hci_dev *hdev,
 705                                            struct sk_buff *skb)
 706 {
 707         struct hci_rp_read_page_scan_activity *rp = (void *) skb->data;
 708
 709         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 710
 711         if (rp->status)
 712                 return;
 713
 714         if (test_bit(HCI_INIT, &hdev->flags)) {
 715                 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
 716                 hdev->page_scan_window = __le16_to_cpu(rp->window);
 717         }
 718 }
 719
 720 static void hci_cc_write_page_scan_activity(struct hci_dev *hdev,
 721                                             struct sk_buff *skb)
 722 {
 723         u8 status = *((u8 *) skb->data);
 724         struct hci_cp_write_page_scan_activity *sent;
 725
 726         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 727
 728         if (status)
 729                 return;
 730
 731         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
 732         if (!sent)
 733                 return;
 734
 735         hdev->page_scan_interval = __le16_to_cpu(sent->interval);
 736         hdev->page_scan_window = __le16_to_cpu(sent->window);
 737 }
 738
 739 static void hci_cc_read_page_scan_type(struct hci_dev *hdev,
 740                                            struct sk_buff *skb)
 741 {
 742         struct hci_rp_read_page_scan_type *rp = (void *) skb->data;
 743
 744         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 745
 746         if (rp->status)
 747                 return;
 748
 749         if (test_bit(HCI_INIT, &hdev->flags))
 750                 hdev->page_scan_type = rp->type;
 751 }
 752
 753 static void hci_cc_write_page_scan_type(struct hci_dev *hdev,
 754                                         struct sk_buff *skb)
 755 {
 756         u8 status = *((u8 *) skb->data);
 757         u8 *type;
 758
 759         BT_DBG("%s status 0x%2.2x", hdev->name, status);
 760
 761         if (status)
 762                 return;
 763
 764         type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
 765         if (type)
 766                 hdev->page_scan_type = *type;
 767 }
 768
 769 static void hci_cc_read_data_block_size(struct hci_dev *hdev,
 770                                         struct sk_buff *skb)
 771 {
 772         struct hci_rp_read_data_block_size *rp = (void *) skb->data;
 773
 774         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 775
 776         if (rp->status)
 777                 return;
 778
 779         hdev->block_mtu = __le16_to_cpu(rp->max_acl_len);
 780         hdev->block_len = __le16_to_cpu(rp->block_len);
 781         hdev->num_blocks = __le16_to_cpu(rp->num_blocks);
 782
 783         hdev->block_cnt = hdev->num_blocks;
 784
 785         BT_DBG("%s blk mtu %d cnt %d len %d", hdev->name, hdev->block_mtu,
 786                hdev->block_cnt, hdev->block_len);
 787 }
 788
 789 static void hci_cc_read_clock(struct hci_dev *hdev, struct sk_buff *skb)
 790 {
 791         struct hci_rp_read_clock *rp = (void *) skb->data;
 792         struct hci_cp_read_clock *cp;
 793         struct hci_conn *conn;
 794
 795         BT_DBG("%s", hdev->name);
 796
 797         if (skb->len < sizeof(*rp))
 798                 return;
 799
 800         if (rp->status)
 801                 return;
 802
 803         hci_dev_lock(hdev);
 804
 805         cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
 806         if (!cp)
 807                 goto unlock;
 808
 809         if (cp->which == 0x00) {
 810                 hdev->clock = le32_to_cpu(rp->clock);
 811                 goto unlock;
 812         }
 813
 814         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 815         if (conn) {
 816                 conn->clock = le32_to_cpu(rp->clock);
 817                 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
 818         }
 819
 820 unlock:
 821         hci_dev_unlock(hdev);
 822 }
 823
 824 static void hci_cc_read_local_amp_info(struct hci_dev *hdev,
 825                                        struct sk_buff *skb)
 826 {
 827         struct hci_rp_read_local_amp_info *rp = (void *) skb->data;
 828
 829         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 830
 831         if (rp->status)
 832                 return;
 833
 834         hdev->amp_status = rp->amp_status;
 835         hdev->amp_total_bw = __le32_to_cpu(rp->total_bw);
 836         hdev->amp_max_bw = __le32_to_cpu(rp->max_bw);
 837         hdev->amp_min_latency = __le32_to_cpu(rp->min_latency);
 838         hdev->amp_max_pdu = __le32_to_cpu(rp->max_pdu);
 839         hdev->amp_type = rp->amp_type;
 840         hdev->amp_pal_cap = __le16_to_cpu(rp->pal_cap);
 841         hdev->amp_assoc_size = __le16_to_cpu(rp->max_assoc_size);
 842         hdev->amp_be_flush_to = __le32_to_cpu(rp->be_flush_to);
 843         hdev->amp_max_flush_to = __le32_to_cpu(rp->max_flush_to);
 844 }
 845
 846 static void hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev,
 847                                          struct sk_buff *skb)
 848 {
 849         struct hci_rp_read_inq_rsp_tx_power *rp = (void *) skb->data;
 850
 851         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 852
 853         if (rp->status)
 854                 return;
 855
 856         hdev->inq_tx_power = rp->tx_power;
 857 }
 858
 859 static void hci_cc_pin_code_reply(struct hci_dev *hdev, struct sk_buff *skb)
 860 {
 861         struct hci_rp_pin_code_reply *rp = (void *) skb->data;
 862         struct hci_cp_pin_code_reply *cp;
 863         struct hci_conn *conn;
 864
 865         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 866
 867         hci_dev_lock(hdev);
 868
 869         if (hci_dev_test_flag(hdev, HCI_MGMT))
 870                 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
 871
 872         if (rp->status)
 873                 goto unlock;
 874
 875         cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
 876         if (!cp)
 877                 goto unlock;
 878
 879         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
 880         if (conn)
 881                 conn->pin_length = cp->pin_len;
 882
 883 unlock:
 884         hci_dev_unlock(hdev);
 885 }
 886
 887 static void hci_cc_pin_code_neg_reply(struct hci_dev *hdev, struct sk_buff *skb)
 888 {
 889         struct hci_rp_pin_code_neg_reply *rp = (void *) skb->data;
 890
 891         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 892
 893         hci_dev_lock(hdev);
 894
 895         if (hci_dev_test_flag(hdev, HCI_MGMT))
 896                 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
 897                                                  rp->status);
 898
 899         hci_dev_unlock(hdev);
 900 }
 901
 902 static void hci_cc_le_read_buffer_size(struct hci_dev *hdev,
 903                                        struct sk_buff *skb)
 904 {
 905         struct hci_rp_le_read_buffer_size *rp = (void *) skb->data;
 906
 907         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 908
 909         if (rp->status)
 910                 return;
 911
 912         hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
 913         hdev->le_pkts = rp->le_max_pkt;
 914
 915         hdev->le_cnt = hdev->le_pkts;
 916
 917         BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
 918 }
 919
 920 static void hci_cc_le_read_local_features(struct hci_dev *hdev,
 921                                           struct sk_buff *skb)
 922 {
 923         struct hci_rp_le_read_local_features *rp = (void *) skb->data;
 924
 925         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 926
 927         if (rp->status)
 928                 return;
 929
 930         memcpy(hdev->le_features, rp->features, 8);
 931 }
 932
 933 static void hci_cc_le_read_adv_tx_power(struct hci_dev *hdev,
 934                                         struct sk_buff *skb)
 935 {
 936         struct hci_rp_le_read_adv_tx_power *rp = (void *) skb->data;
 937
 938         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 939
 940         if (rp->status)
 941                 return;
 942
 943         hdev->adv_tx_power = rp->tx_power;
 944 }
 945
 946 static void hci_cc_user_confirm_reply(struct hci_dev *hdev, struct sk_buff *skb)
 947 {
 948         struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
 949
 950         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 951
 952         hci_dev_lock(hdev);
 953
 954         if (hci_dev_test_flag(hdev, HCI_MGMT))
 955                 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
 956                                                  rp->status);
 957
 958         hci_dev_unlock(hdev);
 959 }
 960
 961 static void hci_cc_user_confirm_neg_reply(struct hci_dev *hdev,
 962                                           struct sk_buff *skb)
 963 {
 964         struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
 965
 966         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 967
 968         hci_dev_lock(hdev);
 969
 970         if (hci_dev_test_flag(hdev, HCI_MGMT))
 971                 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
 972                                                      ACL_LINK, 0, rp->status);
 973
 974         hci_dev_unlock(hdev);
 975 }
 976
 977 static void hci_cc_user_passkey_reply(struct hci_dev *hdev, struct sk_buff *skb)
 978 {
 979         struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
 980
 981         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 982
 983         hci_dev_lock(hdev);
 984
 985         if (hci_dev_test_flag(hdev, HCI_MGMT))
 986                 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
 987                                                  0, rp->status);
 988
 989         hci_dev_unlock(hdev);
 990 }
 991
 992 static void hci_cc_user_passkey_neg_reply(struct hci_dev *hdev,
 993                                           struct sk_buff *skb)
 994 {
 995         struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
 996
 997         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 998
 999         hci_dev_lock(hdev);
1000
1001         if (hci_dev_test_flag(hdev, HCI_MGMT))
1002                 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1003                                                      ACL_LINK, 0, rp->status);
1004
1005         hci_dev_unlock(hdev);
1006 }
1007
1008 static void hci_cc_read_local_oob_data(struct hci_dev *hdev,
1009                                        struct sk_buff *skb)
1010 {
1011         struct hci_rp_read_local_oob_data *rp = (void *) skb->data;
1012
1013         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1014 }
1015
1016 static void hci_cc_read_local_oob_ext_data(struct hci_dev *hdev,
1017                                            struct sk_buff *skb)
1018 {
1019         struct hci_rp_read_local_oob_ext_data *rp = (void *) skb->data;
1020
1021         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1022 }
1023
1024 static void hci_cc_le_set_random_addr(struct hci_dev *hdev, struct sk_buff *skb)
1025 {
1026         __u8 status = *((__u8 *) skb->data);
1027         bdaddr_t *sent;
1028
1029         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1030
1031         if (status)
1032                 return;
1033
1034         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1035         if (!sent)
1036                 return;
1037
1038         hci_dev_lock(hdev);
1039
1040         bacpy(&hdev->random_addr, sent);
1041
1042         hci_dev_unlock(hdev);
1043 }
1044
1045 static void hci_cc_le_set_default_phy(struct hci_dev *hdev, struct sk_buff *skb)
1046 {
1047         __u8 status = *((__u8 *) skb->data);
1048         struct hci_cp_le_set_default_phy *cp;
1049
1050         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1051
1052         if (status)
1053                 return;
1054
1055         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1056         if (!cp)
1057                 return;
1058
1059         hci_dev_lock(hdev);
1060
1061         hdev->le_tx_def_phys = cp->tx_phys;
1062         hdev->le_rx_def_phys = cp->rx_phys;
1063
1064         hci_dev_unlock(hdev);
1065 }
1066
1067 static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev,
1068                                               struct sk_buff *skb)
1069 {
1070         __u8 status = *((__u8 *) skb->data);
1071         struct hci_cp_le_set_adv_set_rand_addr *cp;
1072         struct adv_info *adv_instance;
1073
1074         if (status)
1075                 return;
1076
1077         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1078         if (!cp)
1079                 return;
1080
1081         hci_dev_lock(hdev);
1082
1083         if (!hdev->cur_adv_instance) {
1084                 /* Store in hdev for instance 0 (Set adv and Directed advs) */
1085                 bacpy(&hdev->random_addr, &cp->bdaddr);
1086         } else {
1087                 adv_instance = hci_find_adv_instance(hdev,
1088                                                      hdev->cur_adv_instance);
1089                 if (adv_instance)
1090                         bacpy(&adv_instance->random_addr, &cp->bdaddr);
1091         }
1092
1093         hci_dev_unlock(hdev);
1094 }
1095
1096 static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb)
1097 {
1098         __u8 *sent, status = *((__u8 *) skb->data);
1099
1100         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1101
1102         if (status)
1103                 return;
1104
1105         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1106         if (!sent)
1107                 return;
1108
1109         hci_dev_lock(hdev);
1110
1111         /* If we're doing connection initiation as peripheral. Set a
1112          * timeout in case something goes wrong.
1113          */
1114         if (*sent) {
1115                 struct hci_conn *conn;
1116
1117                 hci_dev_set_flag(hdev, HCI_LE_ADV);
1118
1119                 conn = hci_lookup_le_connect(hdev);
1120                 if (conn)
1121                         queue_delayed_work(hdev->workqueue,
1122                                            &conn->le_conn_timeout,
1123                                            conn->conn_timeout);
1124         } else {
1125                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1126         }
1127
1128         hci_dev_unlock(hdev);
1129 }
1130
1131 static void hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev,
1132                                          struct sk_buff *skb)
1133 {
1134         struct hci_cp_le_set_ext_adv_enable *cp;
1135         __u8 status = *((__u8 *) skb->data);
1136
1137         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1138
1139         if (status)
1140                 return;
1141
1142         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1143         if (!cp)
1144                 return;
1145
1146         hci_dev_lock(hdev);
1147
1148         if (cp->enable) {
1149                 struct hci_conn *conn;
1150
1151                 hci_dev_set_flag(hdev, HCI_LE_ADV);
1152
1153                 conn = hci_lookup_le_connect(hdev);
1154                 if (conn)
1155                         queue_delayed_work(hdev->workqueue,
1156                                            &conn->le_conn_timeout,
1157                                            conn->conn_timeout);
1158         } else {
1159                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1160         }
1161
1162         hci_dev_unlock(hdev);
1163 }
1164
1165 static void hci_cc_le_set_scan_param(struct hci_dev *hdev, struct sk_buff *skb)
1166 {
1167         struct hci_cp_le_set_scan_param *cp;
1168         __u8 status = *((__u8 *) skb->data);
1169
1170         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1171
1172         if (status)
1173                 return;
1174
1175         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1176         if (!cp)
1177                 return;
1178
1179         hci_dev_lock(hdev);
1180
1181         hdev->le_scan_type = cp->type;
1182
1183         hci_dev_unlock(hdev);
1184 }
1185
1186 static void hci_cc_le_set_ext_scan_param(struct hci_dev *hdev,
1187                                          struct sk_buff *skb)
1188 {
1189         struct hci_cp_le_set_ext_scan_params *cp;
1190         __u8 status = *((__u8 *) skb->data);
1191         struct hci_cp_le_scan_phy_params *phy_param;
1192
1193         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1194
1195         if (status)
1196                 return;
1197
1198         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1199         if (!cp)
1200                 return;
1201
1202         phy_param = (void *)cp->data;
1203
1204         hci_dev_lock(hdev);
1205
1206         hdev->le_scan_type = phy_param->type;
1207
1208         hci_dev_unlock(hdev);
1209 }
1210
1211 static bool has_pending_adv_report(struct hci_dev *hdev)
1212 {
1213         struct discovery_state *d = &hdev->discovery;
1214
1215         return bacmp(&d->last_adv_addr, BDADDR_ANY);
1216 }
1217
1218 static void clear_pending_adv_report(struct hci_dev *hdev)
1219 {
1220         struct discovery_state *d = &hdev->discovery;
1221
1222         bacpy(&d->last_adv_addr, BDADDR_ANY);
1223         d->last_adv_data_len = 0;
1224 }
1225
1226 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1227                                      u8 bdaddr_type, s8 rssi, u32 flags,
1228                                      u8 *data, u8 len)
1229 {
1230         struct discovery_state *d = &hdev->discovery;
1231
1232         bacpy(&d->last_adv_addr, bdaddr);
1233         d->last_adv_addr_type = bdaddr_type;
1234         d->last_adv_rssi = rssi;
1235         d->last_adv_flags = flags;
1236         memcpy(d->last_adv_data, data, len);
1237         d->last_adv_data_len = len;
1238 }
1239
1240 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1241 {
1242         hci_dev_lock(hdev);
1243
1244         switch (enable) {
1245         case LE_SCAN_ENABLE:
1246                 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1247                 if (hdev->le_scan_type == LE_SCAN_ACTIVE)
1248                         clear_pending_adv_report(hdev);
1249                 break;
1250
1251         case LE_SCAN_DISABLE:
1252                 /* We do this here instead of when setting DISCOVERY_STOPPED
1253                  * since the latter would potentially require waiting for
1254                  * inquiry to stop too.
1255                  */
1256                 if (has_pending_adv_report(hdev)) {
1257                         struct discovery_state *d = &hdev->discovery;
1258
1259                         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1260                                           d->last_adv_addr_type, NULL,
1261                                           d->last_adv_rssi, d->last_adv_flags,
1262                                           d->last_adv_data,
1263                                           d->last_adv_data_len, NULL, 0);
1264                 }
1265
1266                 /* Cancel this timer so that we don't try to disable scanning
1267                  * when it's already disabled.
1268                  */
1269                 cancel_delayed_work(&hdev->le_scan_disable);
1270
1271                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1272
1273                 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1274                  * interrupted scanning due to a connect request. Mark
1275                  * therefore discovery as stopped. If this was not
1276                  * because of a connect request advertising might have
1277                  * been disabled because of active scanning, so
1278                  * re-enable it again if necessary.
1279                  */
1280                 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1281                         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1282                 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1283                          hdev->discovery.state == DISCOVERY_FINDING)
1284                         hci_req_reenable_advertising(hdev);
1285
1286                 break;
1287
1288         default:
1289                 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1290                            enable);
1291                 break;
1292         }
1293
1294         hci_dev_unlock(hdev);
1295 }
1296
1297 static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,
1298                                       struct sk_buff *skb)
1299 {
1300         struct hci_cp_le_set_scan_enable *cp;
1301         __u8 status = *((__u8 *) skb->data);
1302
1303         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1304
1305         if (status)
1306                 return;
1307
1308         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1309         if (!cp)
1310                 return;
1311
1312         le_set_scan_enable_complete(hdev, cp->enable);
1313 }
1314
1315 static void hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev,
1316                                       struct sk_buff *skb)
1317 {
1318         struct hci_cp_le_set_ext_scan_enable *cp;
1319         __u8 status = *((__u8 *) skb->data);
1320
1321         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1322
1323         if (status)
1324                 return;
1325
1326         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1327         if (!cp)
1328                 return;
1329
1330         le_set_scan_enable_complete(hdev, cp->enable);
1331 }
1332
1333 static void hci_cc_le_read_num_adv_sets(struct hci_dev *hdev,
1334                                       struct sk_buff *skb)
1335 {
1336         struct hci_rp_le_read_num_supported_adv_sets *rp = (void *) skb->data;
1337
1338         BT_DBG("%s status 0x%2.2x No of Adv sets %u", hdev->name, rp->status,
1339                rp->num_of_sets);
1340
1341         if (rp->status)
1342                 return;
1343
1344         hdev->le_num_of_adv_sets = rp->num_of_sets;
1345 }
1346
1347 static void hci_cc_le_read_white_list_size(struct hci_dev *hdev,
1348                                            struct sk_buff *skb)
1349 {
1350         struct hci_rp_le_read_white_list_size *rp = (void *) skb->data;
1351
1352         BT_DBG("%s status 0x%2.2x size %u", hdev->name, rp->status, rp->size);
1353
1354         if (rp->status)
1355                 return;
1356
1357         hdev->le_white_list_size = rp->size;
1358 }
1359
1360 static void hci_cc_le_clear_white_list(struct hci_dev *hdev,
1361                                        struct sk_buff *skb)
1362 {
1363         __u8 status = *((__u8 *) skb->data);
1364
1365         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1366
1367         if (status)
1368                 return;
1369
1370         hci_bdaddr_list_clear(&hdev->le_white_list);
1371 }
1372
1373 static void hci_cc_le_add_to_white_list(struct hci_dev *hdev,
1374                                         struct sk_buff *skb)
1375 {
1376         struct hci_cp_le_add_to_white_list *sent;
1377         __u8 status = *((__u8 *) skb->data);
1378
1379         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1380
1381         if (status)
1382                 return;
1383
1384         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_WHITE_LIST);
1385         if (!sent)
1386                 return;
1387
1388         hci_bdaddr_list_add(&hdev->le_white_list, &sent->bdaddr,
1389                            sent->bdaddr_type);
1390 }
1391
1392 static void hci_cc_le_del_from_white_list(struct hci_dev *hdev,
1393                                           struct sk_buff *skb)
1394 {
1395         struct hci_cp_le_del_from_white_list *sent;
1396         __u8 status = *((__u8 *) skb->data);
1397
1398         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1399
1400         if (status)
1401                 return;
1402
1403         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_WHITE_LIST);
1404         if (!sent)
1405                 return;
1406
1407         hci_bdaddr_list_del(&hdev->le_white_list, &sent->bdaddr,
1408                             sent->bdaddr_type);
1409 }
1410
1411 static void hci_cc_le_read_supported_states(struct hci_dev *hdev,
1412                                             struct sk_buff *skb)
1413 {
1414         struct hci_rp_le_read_supported_states *rp = (void *) skb->data;
1415
1416         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1417
1418         if (rp->status)
1419                 return;
1420
1421         memcpy(hdev->le_states, rp->le_states, 8);
1422 }
1423
1424 static void hci_cc_le_read_def_data_len(struct hci_dev *hdev,
1425                                         struct sk_buff *skb)
1426 {
1427         struct hci_rp_le_read_def_data_len *rp = (void *) skb->data;
1428
1429         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1430
1431         if (rp->status)
1432                 return;
1433
1434         hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1435         hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1436 }
1437
1438 static void hci_cc_le_write_def_data_len(struct hci_dev *hdev,
1439                                          struct sk_buff *skb)
1440 {
1441         struct hci_cp_le_write_def_data_len *sent;
1442         __u8 status = *((__u8 *) skb->data);
1443
1444         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1445
1446         if (status)
1447                 return;
1448
1449         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1450         if (!sent)
1451                 return;
1452
1453         hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1454         hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1455 }
1456
1457 static void hci_cc_le_clear_resolv_list(struct hci_dev *hdev,
1458                                        struct sk_buff *skb)
1459 {
1460         __u8 status = *((__u8 *) skb->data);
1461
1462         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1463
1464         if (status)
1465                 return;
1466
1467         hci_bdaddr_list_clear(&hdev->le_resolv_list);
1468 }
1469
1470 static void hci_cc_le_read_resolv_list_size(struct hci_dev *hdev,
1471                                            struct sk_buff *skb)
1472 {
1473         struct hci_rp_le_read_resolv_list_size *rp = (void *) skb->data;
1474
1475         BT_DBG("%s status 0x%2.2x size %u", hdev->name, rp->status, rp->size);
1476
1477         if (rp->status)
1478                 return;
1479
1480         hdev->le_resolv_list_size = rp->size;
1481 }
1482
1483 static void hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev,
1484                                                 struct sk_buff *skb)
1485 {
1486         __u8 *sent, status = *((__u8 *) skb->data);
1487
1488         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1489
1490         if (status)
1491                 return;
1492
1493         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
1494         if (!sent)
1495                 return;
1496
1497         hci_dev_lock(hdev);
1498
1499         if (*sent)
1500                 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
1501         else
1502                 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
1503
1504         hci_dev_unlock(hdev);
1505 }
1506
1507 static void hci_cc_le_read_max_data_len(struct hci_dev *hdev,
1508                                         struct sk_buff *skb)
1509 {
1510         struct hci_rp_le_read_max_data_len *rp = (void *) skb->data;
1511
1512         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1513
1514         if (rp->status)
1515                 return;
1516
1517         hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
1518         hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
1519         hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
1520         hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
1521 }
1522
1523 static void hci_cc_write_le_host_supported(struct hci_dev *hdev,
1524                                            struct sk_buff *skb)
1525 {
1526         struct hci_cp_write_le_host_supported *sent;
1527         __u8 status = *((__u8 *) skb->data);
1528
1529         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1530
1531         if (status)
1532                 return;
1533
1534         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
1535         if (!sent)
1536                 return;
1537
1538         hci_dev_lock(hdev);
1539
1540         if (sent->le) {
1541                 hdev->features[1][0] |= LMP_HOST_LE;
1542                 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
1543         } else {
1544                 hdev->features[1][0] &= ~LMP_HOST_LE;
1545                 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
1546                 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
1547         }
1548
1549         if (sent->simul)
1550                 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
1551         else
1552                 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
1553
1554         hci_dev_unlock(hdev);
1555 }
1556
1557 static void hci_cc_set_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
1558 {
1559         struct hci_cp_le_set_adv_param *cp;
1560         u8 status = *((u8 *) skb->data);
1561
1562         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1563
1564         if (status)
1565                 return;
1566
1567         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
1568         if (!cp)
1569                 return;
1570
1571         hci_dev_lock(hdev);
1572         hdev->adv_addr_type = cp->own_address_type;
1573         hci_dev_unlock(hdev);
1574 }
1575
1576 static void hci_cc_set_ext_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
1577 {
1578         struct hci_rp_le_set_ext_adv_params *rp = (void *) skb->data;
1579         struct hci_cp_le_set_ext_adv_params *cp;
1580         struct adv_info *adv_instance;
1581
1582         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1583
1584         if (rp->status)
1585                 return;
1586
1587         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
1588         if (!cp)
1589                 return;
1590
1591         hci_dev_lock(hdev);
1592         hdev->adv_addr_type = cp->own_addr_type;
1593         if (!hdev->cur_adv_instance) {
1594                 /* Store in hdev for instance 0 */
1595                 hdev->adv_tx_power = rp->tx_power;
1596         } else {
1597                 adv_instance = hci_find_adv_instance(hdev,
1598                                                      hdev->cur_adv_instance);
1599                 if (adv_instance)
1600                         adv_instance->tx_power = rp->tx_power;
1601         }
1602         /* Update adv data as tx power is known now */
1603         hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1604         hci_dev_unlock(hdev);
1605 }
1606
1607 static void hci_cc_read_rssi(struct hci_dev *hdev, struct sk_buff *skb)
1608 {
1609         struct hci_rp_read_rssi *rp = (void *) skb->data;
1610         struct hci_conn *conn;
1611
1612         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1613
1614         if (rp->status)
1615                 return;
1616
1617         hci_dev_lock(hdev);
1618
1619         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1620         if (conn)
1621                 conn->rssi = rp->rssi;
1622
1623         hci_dev_unlock(hdev);
1624 }
1625
1626 static void hci_cc_read_tx_power(struct hci_dev *hdev, struct sk_buff *skb)
1627 {
1628         struct hci_cp_read_tx_power *sent;
1629         struct hci_rp_read_tx_power *rp = (void *) skb->data;
1630         struct hci_conn *conn;
1631
1632         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1633
1634         if (rp->status)
1635                 return;
1636
1637         sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
1638         if (!sent)
1639                 return;
1640
1641         hci_dev_lock(hdev);
1642
1643         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1644         if (!conn)
1645                 goto unlock;
1646
1647         switch (sent->type) {
1648         case 0x00:
1649                 conn->tx_power = rp->tx_power;
1650                 break;
1651         case 0x01:
1652                 conn->max_tx_power = rp->tx_power;
1653                 break;
1654         }
1655
1656 unlock:
1657         hci_dev_unlock(hdev);
1658 }
1659
1660 static void hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, struct sk_buff *skb)
1661 {
1662         u8 status = *((u8 *) skb->data);
1663         u8 *mode;
1664
1665         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1666
1667         if (status)
1668                 return;
1669
1670         mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
1671         if (mode)
1672                 hdev->ssp_debug_mode = *mode;
1673 }
1674
1675 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
1676 {
1677         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1678
1679         if (status) {
1680                 hci_conn_check_pending(hdev);
1681                 return;
1682         }
1683
1684         set_bit(HCI_INQUIRY, &hdev->flags);
1685 }
1686
1687 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
1688 {
1689         struct hci_cp_create_conn *cp;
1690         struct hci_conn *conn;
1691
1692         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1693
1694         cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
1695         if (!cp)
1696                 return;
1697
1698         hci_dev_lock(hdev);
1699
1700         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1701
1702         BT_DBG("%s bdaddr %pMR hcon %p", hdev->name, &cp->bdaddr, conn);
1703
1704         if (status) {
1705                 if (conn && conn->state == BT_CONNECT) {
1706                         if (status != 0x0c || conn->attempt > 2) {
1707                                 conn->state = BT_CLOSED;
1708                                 hci_connect_cfm(conn, status);
1709                                 hci_conn_del(conn);
1710                         } else
1711                                 conn->state = BT_CONNECT2;
1712                 }
1713         } else {
1714                 if (!conn) {
1715                         conn = hci_conn_add(hdev, ACL_LINK, &cp->bdaddr,
1716                                             HCI_ROLE_MASTER);
1717                         if (!conn)
1718                                 bt_dev_err(hdev, "no memory for new connection");
1719                 }
1720         }
1721
1722         hci_dev_unlock(hdev);
1723 }
1724
1725 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
1726 {
1727         struct hci_cp_add_sco *cp;
1728         struct hci_conn *acl, *sco;
1729         __u16 handle;
1730
1731         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1732
1733         if (!status)
1734                 return;
1735
1736         cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
1737         if (!cp)
1738                 return;
1739
1740         handle = __le16_to_cpu(cp->handle);
1741
1742         BT_DBG("%s handle 0x%4.4x", hdev->name, handle);
1743
1744         hci_dev_lock(hdev);
1745
1746         acl = hci_conn_hash_lookup_handle(hdev, handle);
1747         if (acl) {
1748                 sco = acl->link;
1749                 if (sco) {
1750                         sco->state = BT_CLOSED;
1751
1752                         hci_connect_cfm(sco, status);
1753                         hci_conn_del(sco);
1754                 }
1755         }
1756
1757         hci_dev_unlock(hdev);
1758 }
1759
1760 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
1761 {
1762         struct hci_cp_auth_requested *cp;
1763         struct hci_conn *conn;
1764
1765         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1766
1767         if (!status)
1768                 return;
1769
1770         cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
1771         if (!cp)
1772                 return;
1773
1774         hci_dev_lock(hdev);
1775
1776         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
1777         if (conn) {
1778                 if (conn->state == BT_CONFIG) {
1779                         hci_connect_cfm(conn, status);
1780                         hci_conn_drop(conn);
1781                 }
1782         }
1783
1784         hci_dev_unlock(hdev);
1785 }
1786
1787 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
1788 {
1789         struct hci_cp_set_conn_encrypt *cp;
1790         struct hci_conn *conn;
1791
1792         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1793
1794         if (!status)
1795                 return;
1796
1797         cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
1798         if (!cp)
1799                 return;
1800
1801         hci_dev_lock(hdev);
1802
1803         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
1804         if (conn) {
1805                 if (conn->state == BT_CONFIG) {
1806                         hci_connect_cfm(conn, status);
1807                         hci_conn_drop(conn);
1808                 }
1809         }
1810
1811         hci_dev_unlock(hdev);
1812 }
1813
1814 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
1815                                     struct hci_conn *conn)
1816 {
1817         if (conn->state != BT_CONFIG || !conn->out)
1818                 return 0;
1819
1820         if (conn->pending_sec_level == BT_SECURITY_SDP)
1821                 return 0;
1822
1823         /* Only request authentication for SSP connections or non-SSP
1824          * devices with sec_level MEDIUM or HIGH or if MITM protection
1825          * is requested.
1826          */
1827         if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
1828             conn->pending_sec_level != BT_SECURITY_FIPS &&
1829             conn->pending_sec_level != BT_SECURITY_HIGH &&
1830             conn->pending_sec_level != BT_SECURITY_MEDIUM)
1831                 return 0;
1832
1833         return 1;
1834 }
1835
1836 static int hci_resolve_name(struct hci_dev *hdev,
1837                                    struct inquiry_entry *e)
1838 {
1839         struct hci_cp_remote_name_req cp;
1840
1841         memset(&cp, 0, sizeof(cp));
1842
1843         bacpy(&cp.bdaddr, &e->data.bdaddr);
1844         cp.pscan_rep_mode = e->data.pscan_rep_mode;
1845         cp.pscan_mode = e->data.pscan_mode;
1846         cp.clock_offset = e->data.clock_offset;
1847
1848         return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
1849 }
1850
1851 static bool hci_resolve_next_name(struct hci_dev *hdev)
1852 {
1853         struct discovery_state *discov = &hdev->discovery;
1854         struct inquiry_entry *e;
1855
1856         if (list_empty(&discov->resolve))
1857                 return false;
1858
1859         e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
1860         if (!e)
1861                 return false;
1862
1863         if (hci_resolve_name(hdev, e) == 0) {
1864                 e->name_state = NAME_PENDING;
1865                 return true;
1866         }
1867
1868         return false;
1869 }
1870
1871 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
1872                                    bdaddr_t *bdaddr, u8 *name, u8 name_len)
1873 {
1874         struct discovery_state *discov = &hdev->discovery;
1875         struct inquiry_entry *e;
1876
1877         /* Update the mgmt connected state if necessary. Be careful with
1878          * conn objects that exist but are not (yet) connected however.
1879          * Only those in BT_CONFIG or BT_CONNECTED states can be
1880          * considered connected.
1881          */
1882         if (conn &&
1883             (conn->state == BT_CONFIG || conn->state == BT_CONNECTED) &&
1884             !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
1885                 mgmt_device_connected(hdev, conn, 0, name, name_len);
1886
1887         if (discov->state == DISCOVERY_STOPPED)
1888                 return;
1889
1890         if (discov->state == DISCOVERY_STOPPING)
1891                 goto discov_complete;
1892
1893         if (discov->state != DISCOVERY_RESOLVING)
1894                 return;
1895
1896         e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
1897         /* If the device was not found in a list of found devices names of which
1898          * are pending. there is no need to continue resolving a next name as it
1899          * will be done upon receiving another Remote Name Request Complete
1900          * Event */
1901         if (!e)
1902                 return;
1903
1904         list_del(&e->list);
1905         if (name) {
1906                 e->name_state = NAME_KNOWN;
1907                 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00,
1908                                  e->data.rssi, name, name_len);
1909         } else {
1910                 e->name_state = NAME_NOT_KNOWN;
1911         }
1912
1913         if (hci_resolve_next_name(hdev))
1914                 return;
1915
1916 discov_complete:
1917         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1918 }
1919
1920 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
1921 {
1922         struct hci_cp_remote_name_req *cp;
1923         struct hci_conn *conn;
1924
1925         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1926
1927         /* If successful wait for the name req complete event before
1928          * checking for the need to do authentication */
1929         if (!status)
1930                 return;
1931
1932         cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
1933         if (!cp)
1934                 return;
1935
1936         hci_dev_lock(hdev);
1937
1938         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1939
1940         if (hci_dev_test_flag(hdev, HCI_MGMT))
1941                 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
1942
1943         if (!conn)
1944                 goto unlock;
1945
1946         if (!hci_outgoing_auth_needed(hdev, conn))
1947                 goto unlock;
1948
1949         if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
1950                 struct hci_cp_auth_requested auth_cp;
1951
1952                 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
1953
1954                 auth_cp.handle = __cpu_to_le16(conn->handle);
1955                 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
1956                              sizeof(auth_cp), &auth_cp);
1957         }
1958
1959 unlock:
1960         hci_dev_unlock(hdev);
1961 }
1962
1963 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
1964 {
1965         struct hci_cp_read_remote_features *cp;
1966         struct hci_conn *conn;
1967
1968         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1969
1970         if (!status)
1971                 return;
1972
1973         cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
1974         if (!cp)
1975                 return;
1976
1977         hci_dev_lock(hdev);
1978
1979         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
1980         if (conn) {
1981                 if (conn->state == BT_CONFIG) {
1982                         hci_connect_cfm(conn, status);
1983                         hci_conn_drop(conn);
1984                 }
1985         }
1986
1987         hci_dev_unlock(hdev);
1988 }
1989
1990 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
1991 {
1992         struct hci_cp_read_remote_ext_features *cp;
1993         struct hci_conn *conn;
1994
1995         BT_DBG("%s status 0x%2.2x", hdev->name, status);
1996
1997         if (!status)
1998                 return;
1999
2000         cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2001         if (!cp)
2002                 return;
2003
2004         hci_dev_lock(hdev);
2005
2006         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2007         if (conn) {
2008                 if (conn->state == BT_CONFIG) {
2009                         hci_connect_cfm(conn, status);
2010                         hci_conn_drop(conn);
2011                 }
2012         }
2013
2014         hci_dev_unlock(hdev);
2015 }
2016
2017 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2018 {
2019         struct hci_cp_setup_sync_conn *cp;
2020         struct hci_conn *acl, *sco;
2021         __u16 handle;
2022
2023         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2024
2025         if (!status)
2026                 return;
2027
2028         cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2029         if (!cp)
2030                 return;
2031
2032         handle = __le16_to_cpu(cp->handle);
2033
2034         BT_DBG("%s handle 0x%4.4x", hdev->name, handle);
2035
2036         hci_dev_lock(hdev);
2037
2038         acl = hci_conn_hash_lookup_handle(hdev, handle);
2039         if (acl) {
2040                 sco = acl->link;
2041                 if (sco) {
2042                         sco->state = BT_CLOSED;
2043
2044                         hci_connect_cfm(sco, status);
2045                         hci_conn_del(sco);
2046                 }
2047         }
2048
2049         hci_dev_unlock(hdev);
2050 }
2051
2052 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2053 {
2054         struct hci_cp_sniff_mode *cp;
2055         struct hci_conn *conn;
2056
2057         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2058
2059         if (!status)
2060                 return;
2061
2062         cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2063         if (!cp)
2064                 return;
2065
2066         hci_dev_lock(hdev);
2067
2068         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2069         if (conn) {
2070                 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2071
2072                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2073                         hci_sco_setup(conn, status);
2074         }
2075
2076         hci_dev_unlock(hdev);
2077 }
2078
2079 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2080 {
2081         struct hci_cp_exit_sniff_mode *cp;
2082         struct hci_conn *conn;
2083
2084         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2085
2086         if (!status)
2087                 return;
2088
2089         cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2090         if (!cp)
2091                 return;
2092
2093         hci_dev_lock(hdev);
2094
2095         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2096         if (conn) {
2097                 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2098
2099                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2100                         hci_sco_setup(conn, status);
2101         }
2102
2103         hci_dev_unlock(hdev);
2104 }
2105
2106 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2107 {
2108         struct hci_cp_disconnect *cp;
2109         struct hci_conn *conn;
2110
2111         if (!status)
2112                 return;
2113
2114         cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2115         if (!cp)
2116                 return;
2117
2118         hci_dev_lock(hdev);
2119
2120         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2121         if (conn)
2122                 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2123                                        conn->dst_type, status);
2124
2125         hci_dev_unlock(hdev);
2126 }
2127
2128 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2129                               u8 peer_addr_type, u8 own_address_type,
2130                               u8 filter_policy)
2131 {
2132         struct hci_conn *conn;
2133
2134         conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2135                                        peer_addr_type);
2136         if (!conn)
2137                 return;
2138
2139         /* Store the initiator and responder address information which
2140          * is needed for SMP. These values will not change during the
2141          * lifetime of the connection.
2142          */
2143         conn->init_addr_type = own_address_type;
2144         if (own_address_type == ADDR_LE_DEV_RANDOM)
2145                 bacpy(&conn->init_addr, &hdev->random_addr);
2146         else
2147                 bacpy(&conn->init_addr, &hdev->bdaddr);
2148
2149         conn->resp_addr_type = peer_addr_type;
2150         bacpy(&conn->resp_addr, peer_addr);
2151
2152         /* We don't want the connection attempt to stick around
2153          * indefinitely since LE doesn't have a page timeout concept
2154          * like BR/EDR. Set a timer for any connection that doesn't use
2155          * the white list for connecting.
2156          */
2157         if (filter_policy == HCI_LE_USE_PEER_ADDR)
2158                 queue_delayed_work(conn->hdev->workqueue,
2159                                    &conn->le_conn_timeout,
2160                                    conn->conn_timeout);
2161 }
2162
2163 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2164 {
2165         struct hci_cp_le_create_conn *cp;
2166
2167         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2168
2169         /* All connection failure handling is taken care of by the
2170          * hci_le_conn_failed function which is triggered by the HCI
2171          * request completion callbacks used for connecting.
2172          */
2173         if (status)
2174                 return;
2175
2176         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2177         if (!cp)
2178                 return;
2179
2180         hci_dev_lock(hdev);
2181
2182         cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2183                           cp->own_address_type, cp->filter_policy);
2184
2185         hci_dev_unlock(hdev);
2186 }
2187
2188 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2189 {
2190         struct hci_cp_le_ext_create_conn *cp;
2191
2192         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2193
2194         /* All connection failure handling is taken care of by the
2195          * hci_le_conn_failed function which is triggered by the HCI
2196          * request completion callbacks used for connecting.
2197          */
2198         if (status)
2199                 return;
2200
2201         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2202         if (!cp)
2203                 return;
2204
2205         hci_dev_lock(hdev);
2206
2207         cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2208                           cp->own_addr_type, cp->filter_policy);
2209
2210         hci_dev_unlock(hdev);
2211 }
2212
2213 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2214 {
2215         struct hci_cp_le_read_remote_features *cp;
2216         struct hci_conn *conn;
2217
2218         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2219
2220         if (!status)
2221                 return;
2222
2223         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2224         if (!cp)
2225                 return;
2226
2227         hci_dev_lock(hdev);
2228
2229         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2230         if (conn) {
2231                 if (conn->state == BT_CONFIG) {
2232                         hci_connect_cfm(conn, status);
2233                         hci_conn_drop(conn);
2234                 }
2235         }
2236
2237         hci_dev_unlock(hdev);
2238 }
2239
2240 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2241 {
2242         struct hci_cp_le_start_enc *cp;
2243         struct hci_conn *conn;
2244
2245         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2246
2247         if (!status)
2248                 return;
2249
2250         hci_dev_lock(hdev);
2251
2252         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2253         if (!cp)
2254                 goto unlock;
2255
2256         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2257         if (!conn)
2258                 goto unlock;
2259
2260         if (conn->state != BT_CONNECTED)
2261                 goto unlock;
2262
2263         hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2264         hci_conn_drop(conn);
2265
2266 unlock:
2267         hci_dev_unlock(hdev);
2268 }
2269
2270 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2271 {
2272         struct hci_cp_switch_role *cp;
2273         struct hci_conn *conn;
2274
2275         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2276
2277         if (!status)
2278                 return;
2279
2280         cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2281         if (!cp)
2282                 return;
2283
2284         hci_dev_lock(hdev);
2285
2286         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2287         if (conn)
2288                 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2289
2290         hci_dev_unlock(hdev);
2291 }
2292
2293 static void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
2294 {
2295         __u8 status = *((__u8 *) skb->data);
2296         struct discovery_state *discov = &hdev->discovery;
2297         struct inquiry_entry *e;
2298
2299         BT_DBG("%s status 0x%2.2x", hdev->name, status);
2300
2301         hci_conn_check_pending(hdev);
2302
2303         if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2304                 return;
2305
2306         smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2307         wake_up_bit(&hdev->flags, HCI_INQUIRY);
2308
2309         if (!hci_dev_test_flag(hdev, HCI_MGMT))
2310                 return;
2311
2312         hci_dev_lock(hdev);
2313
2314         if (discov->state != DISCOVERY_FINDING)
2315                 goto unlock;
2316
2317         if (list_empty(&discov->resolve)) {
2318                 /* When BR/EDR inquiry is active and no LE scanning is in
2319                  * progress, then change discovery state to indicate completion.
2320                  *
2321                  * When running LE scanning and BR/EDR inquiry simultaneously
2322                  * and the LE scan already finished, then change the discovery
2323                  * state to indicate completion.
2324                  */
2325                 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2326                     !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2327                         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2328                 goto unlock;
2329         }
2330
2331         e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2332         if (e && hci_resolve_name(hdev, e) == 0) {
2333                 e->name_state = NAME_PENDING;
2334                 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
2335         } else {
2336                 /* When BR/EDR inquiry is active and no LE scanning is in
2337                  * progress, then change discovery state to indicate completion.
2338                  *
2339                  * When running LE scanning and BR/EDR inquiry simultaneously
2340                  * and the LE scan already finished, then change the discovery
2341                  * state to indicate completion.
2342                  */
2343                 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2344                     !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2345                         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2346         }
2347
2348 unlock:
2349         hci_dev_unlock(hdev);
2350 }
2351
2352 static void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb)
2353 {
2354         struct inquiry_data data;
2355         struct inquiry_info *info = (void *) (skb->data + 1);
2356         int num_rsp = *((__u8 *) skb->data);
2357
2358         BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
2359
2360         if (!num_rsp)
2361                 return;
2362
2363         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
2364                 return;
2365
2366         hci_dev_lock(hdev);
2367
2368         for (; num_rsp; num_rsp--, info++) {
2369                 u32 flags;
2370
2371                 bacpy(&data.bdaddr, &info->bdaddr);
2372                 data.pscan_rep_mode     = info->pscan_rep_mode;
2373                 data.pscan_period_mode  = info->pscan_period_mode;
2374                 data.pscan_mode         = info->pscan_mode;
2375                 memcpy(data.dev_class, info->dev_class, 3);
2376                 data.clock_offset       = info->clock_offset;
2377                 data.rssi               = HCI_RSSI_INVALID;
2378                 data.ssp_mode           = 0x00;
2379
2380                 flags = hci_inquiry_cache_update(hdev, &data, false);
2381
2382                 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
2383                                   info->dev_class, HCI_RSSI_INVALID,
2384                                   flags, NULL, 0, NULL, 0);
2385         }
2386
2387         hci_dev_unlock(hdev);
2388 }
2389
2390 static void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
2391 {
2392         struct hci_ev_conn_complete *ev = (void *) skb->data;
2393         struct hci_conn *conn;
2394
2395         BT_DBG("%s", hdev->name);
2396
2397         hci_dev_lock(hdev);
2398
2399         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
2400         if (!conn) {
2401                 if (ev->link_type != SCO_LINK)
2402                         goto unlock;
2403
2404                 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
2405                 if (!conn)
2406                         goto unlock;
2407
2408                 conn->type = SCO_LINK;
2409         }
2410
2411         if (!ev->status) {
2412                 conn->handle = __le16_to_cpu(ev->handle);
2413
2414                 if (conn->type == ACL_LINK) {
2415                         conn->state = BT_CONFIG;
2416                         hci_conn_hold(conn);
2417
2418                         if (!conn->out && !hci_conn_ssp_enabled(conn) &&
2419                             !hci_find_link_key(hdev, &ev->bdaddr))
2420                                 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
2421                         else
2422                                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
2423                 } else
2424                         conn->state = BT_CONNECTED;
2425
2426                 hci_debugfs_create_conn(conn);
2427                 hci_conn_add_sysfs(conn);
2428
2429                 if (test_bit(HCI_AUTH, &hdev->flags))
2430                         set_bit(HCI_CONN_AUTH, &conn->flags);
2431
2432                 if (test_bit(HCI_ENCRYPT, &hdev->flags))
2433                         set_bit(HCI_CONN_ENCRYPT, &conn->flags);
2434
2435                 /* Get remote features */
2436                 if (conn->type == ACL_LINK) {
2437                         struct hci_cp_read_remote_features cp;
2438                         cp.handle = ev->handle;
2439                         hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
2440                                      sizeof(cp), &cp);
2441
2442                         hci_req_update_scan(hdev);
2443                 }
2444
2445                 /* Set packet type for incoming connection */
2446                 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
2447                         struct hci_cp_change_conn_ptype cp;
2448                         cp.handle = ev->handle;
2449                         cp.pkt_type = cpu_to_le16(conn->pkt_type);
2450                         hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
2451                                      &cp);
2452                 }
2453         } else {
2454                 conn->state = BT_CLOSED;
2455                 if (conn->type == ACL_LINK)
2456                         mgmt_connect_failed(hdev, &conn->dst, conn->type,
2457                                             conn->dst_type, ev->status);
2458         }
2459
2460         if (conn->type == ACL_LINK)
2461                 hci_sco_setup(conn, ev->status);
2462
2463         if (ev->status) {
2464                 hci_connect_cfm(conn, ev->status);
2465                 hci_conn_del(conn);
2466         } else if (ev->link_type != ACL_LINK)
2467                 hci_connect_cfm(conn, ev->status);
2468
2469 unlock:
2470         hci_dev_unlock(hdev);
2471
2472         hci_conn_check_pending(hdev);
2473 }
2474
2475 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
2476 {
2477         struct hci_cp_reject_conn_req cp;
2478
2479         bacpy(&cp.bdaddr, bdaddr);
2480         cp.reason = HCI_ERROR_REJ_BAD_ADDR;
2481         hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
2482 }
2483
2484 static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
2485 {
2486         struct hci_ev_conn_request *ev = (void *) skb->data;
2487         int mask = hdev->link_mode;
2488         struct inquiry_entry *ie;
2489         struct hci_conn *conn;
2490         __u8 flags = 0;
2491
2492         BT_DBG("%s bdaddr %pMR type 0x%x", hdev->name, &ev->bdaddr,
2493                ev->link_type);
2494
2495         mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
2496                                       &flags);
2497
2498         if (!(mask & HCI_LM_ACCEPT)) {
2499                 hci_reject_conn(hdev, &ev->bdaddr);
2500                 return;
2501         }
2502
2503         if (hci_bdaddr_list_lookup(&hdev->blacklist, &ev->bdaddr,
2504                                    BDADDR_BREDR)) {
2505                 hci_reject_conn(hdev, &ev->bdaddr);
2506                 return;
2507         }
2508
2509         /* Require HCI_CONNECTABLE or a whitelist entry to accept the
2510          * connection. These features are only touched through mgmt so
2511          * only do the checks if HCI_MGMT is set.
2512          */
2513         if (hci_dev_test_flag(hdev, HCI_MGMT) &&
2514             !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
2515             !hci_bdaddr_list_lookup(&hdev->whitelist, &ev->bdaddr,
2516                                     BDADDR_BREDR)) {
2517                     hci_reject_conn(hdev, &ev->bdaddr);
2518                     return;
2519         }
2520
2521         /* Connection accepted */
2522
2523         hci_dev_lock(hdev);
2524
2525         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
2526         if (ie)
2527                 memcpy(ie->data.dev_class, ev->dev_class, 3);
2528
2529         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
2530                         &ev->bdaddr);
2531         if (!conn) {
2532                 conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr,
2533                                     HCI_ROLE_SLAVE);
2534                 if (!conn) {
2535                         bt_dev_err(hdev, "no memory for new connection");
2536                         hci_dev_unlock(hdev);
2537                         return;
2538                 }
2539         }
2540
2541         memcpy(conn->dev_class, ev->dev_class, 3);
2542
2543         hci_dev_unlock(hdev);
2544
2545         if (ev->link_type == ACL_LINK ||
2546             (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
2547                 struct hci_cp_accept_conn_req cp;
2548                 conn->state = BT_CONNECT;
2549
2550                 bacpy(&cp.bdaddr, &ev->bdaddr);
2551
2552                 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
2553                         cp.role = 0x00; /* Become master */
2554                 else
2555                         cp.role = 0x01; /* Remain slave */
2556
2557                 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
2558         } else if (!(flags & HCI_PROTO_DEFER)) {
2559                 struct hci_cp_accept_sync_conn_req cp;
2560                 conn->state = BT_CONNECT;
2561
2562                 bacpy(&cp.bdaddr, &ev->bdaddr);
2563                 cp.pkt_type = cpu_to_le16(conn->pkt_type);
2564
2565                 cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
2566                 cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
2567                 cp.max_latency    = cpu_to_le16(0xffff);
2568                 cp.content_format = cpu_to_le16(hdev->voice_setting);
2569                 cp.retrans_effort = 0xff;
2570
2571                 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
2572                              &cp);
2573         } else {
2574                 conn->state = BT_CONNECT2;
2575                 hci_connect_cfm(conn, 0);
2576         }
2577 }
2578
2579 static u8 hci_to_mgmt_reason(u8 err)
2580 {
2581         switch (err) {
2582         case HCI_ERROR_CONNECTION_TIMEOUT:
2583                 return MGMT_DEV_DISCONN_TIMEOUT;
2584         case HCI_ERROR_REMOTE_USER_TERM:
2585         case HCI_ERROR_REMOTE_LOW_RESOURCES:
2586         case HCI_ERROR_REMOTE_POWER_OFF:
2587                 return MGMT_DEV_DISCONN_REMOTE;
2588         case HCI_ERROR_LOCAL_HOST_TERM:
2589                 return MGMT_DEV_DISCONN_LOCAL_HOST;
2590         default:
2591                 return MGMT_DEV_DISCONN_UNKNOWN;
2592         }
2593 }
2594
2595 static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
2596 {
2597         struct hci_ev_disconn_complete *ev = (void *) skb->data;
2598         u8 reason;
2599         struct hci_conn_params *params;
2600         struct hci_conn *conn;
2601         bool mgmt_connected;
2602         u8 type;
2603
2604         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
2605
2606         hci_dev_lock(hdev);
2607
2608         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
2609         if (!conn)
2610                 goto unlock;
2611
2612         if (ev->status) {
2613                 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2614                                        conn->dst_type, ev->status);
2615                 goto unlock;
2616         }
2617
2618         conn->state = BT_CLOSED;
2619
2620         mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2621
2622         if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
2623                 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
2624         else
2625                 reason = hci_to_mgmt_reason(ev->reason);
2626
2627         mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2628                                 reason, mgmt_connected);
2629
2630         if (conn->type == ACL_LINK) {
2631                 if (test_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2632                         hci_remove_link_key(hdev, &conn->dst);
2633
2634                 hci_req_update_scan(hdev);
2635         }
2636
2637         params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2638         if (params) {
2639                 switch (params->auto_connect) {
2640                 case HCI_AUTO_CONN_LINK_LOSS:
2641                         if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2642                                 break;
2643                         /* Fall through */
2644
2645                 case HCI_AUTO_CONN_DIRECT:
2646                 case HCI_AUTO_CONN_ALWAYS:
2647                         list_del_init(&params->action);
2648                         list_add(&params->action, &hdev->pend_le_conns);
2649                         hci_update_background_scan(hdev);
2650                         break;
2651
2652                 default:
2653                         break;
2654                 }
2655         }
2656
2657         type = conn->type;
2658
2659         hci_disconn_cfm(conn, ev->reason);
2660         hci_conn_del(conn);
2661
2662         /* Re-enable advertising if necessary, since it might
2663          * have been disabled by the connection. From the
2664          * HCI_LE_Set_Advertise_Enable command description in
2665          * the core specification (v4.0):
2666          * "The Controller shall continue advertising until the Host
2667          * issues an LE_Set_Advertise_Enable command with
2668          * Advertising_Enable set to 0x00 (Advertising is disabled)
2669          * or until a connection is created or until the Advertising
2670          * is timed out due to Directed Advertising."
2671          */
2672         if (type == LE_LINK)
2673                 hci_req_reenable_advertising(hdev);
2674
2675 unlock:
2676         hci_dev_unlock(hdev);
2677 }
2678
2679 static void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
2680 {
2681         struct hci_ev_auth_complete *ev = (void *) skb->data;
2682         struct hci_conn *conn;
2683
2684         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
2685
2686         hci_dev_lock(hdev);
2687
2688         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
2689         if (!conn)
2690                 goto unlock;
2691
2692         if (!ev->status) {
2693                 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
2694
2695                 if (!hci_conn_ssp_enabled(conn) &&
2696                     test_bit(HCI_CONN_REAUTH_PEND, &conn->flags)) {
2697                         bt_dev_info(hdev, "re-auth of legacy device is not possible.");
2698                 } else {
2699                         set_bit(HCI_CONN_AUTH, &conn->flags);
2700                         conn->sec_level = conn->pending_sec_level;
2701                 }
2702         } else {
2703                 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
2704                         set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
2705
2706                 mgmt_auth_failed(conn, ev->status);
2707         }
2708
2709         clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
2710         clear_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
2711
2712         if (conn->state == BT_CONFIG) {
2713                 if (!ev->status && hci_conn_ssp_enabled(conn)) {
2714                         struct hci_cp_set_conn_encrypt cp;
2715                         cp.handle  = ev->handle;
2716                         cp.encrypt = 0x01;
2717                         hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
2718                                      &cp);
2719                 } else {
2720                         conn->state = BT_CONNECTED;
2721                         hci_connect_cfm(conn, ev->status);
2722                         hci_conn_drop(conn);
2723                 }
2724         } else {
2725                 hci_auth_cfm(conn, ev->status);
2726
2727                 hci_conn_hold(conn);
2728                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
2729                 hci_conn_drop(conn);
2730         }
2731
2732         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
2733                 if (!ev->status) {
2734                         struct hci_cp_set_conn_encrypt cp;
2735                         cp.handle  = ev->handle;
2736                         cp.encrypt = 0x01;
2737                         hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
2738                                      &cp);
2739                 } else {
2740                         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
2741                         hci_encrypt_cfm(conn, ev->status, 0x00);
2742                 }
2743         }
2744
2745 unlock:
2746         hci_dev_unlock(hdev);
2747 }
2748
2749 static void hci_remote_name_evt(struct hci_dev *hdev, struct sk_buff *skb)
2750 {
2751         struct hci_ev_remote_name *ev = (void *) skb->data;
2752         struct hci_conn *conn;
2753
2754         BT_DBG("%s", hdev->name);
2755
2756         hci_conn_check_pending(hdev);
2757
2758         hci_dev_lock(hdev);
2759
2760         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
2761
2762         if (!hci_dev_test_flag(hdev, HCI_MGMT))
2763                 goto check_auth;
2764
2765         if (ev->status == 0)
2766                 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
2767                                        strnlen(ev->name, HCI_MAX_NAME_LENGTH));
2768         else
2769                 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
2770
2771 check_auth:
2772         if (!conn)
2773                 goto unlock;
2774
2775         if (!hci_outgoing_auth_needed(hdev, conn))
2776                 goto unlock;
2777
2778         if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2779                 struct hci_cp_auth_requested cp;
2780
2781                 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2782
2783                 cp.handle = __cpu_to_le16(conn->handle);
2784                 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
2785         }
2786
2787 unlock:
2788         hci_dev_unlock(hdev);
2789 }
2790
2791 static void read_enc_key_size_complete(struct hci_dev *hdev, u8 status,
2792                                        u16 opcode, struct sk_buff *skb)
2793 {
2794         const struct hci_rp_read_enc_key_size *rp;
2795         struct hci_conn *conn;
2796         u16 handle;
2797
2798         BT_DBG("%s status 0x%02x", hdev->name, status);
2799
2800         if (!skb || skb->len < sizeof(*rp)) {
2801                 bt_dev_err(hdev, "invalid read key size response");
2802                 return;
2803         }
2804
2805         rp = (void *)skb->data;
2806         handle = le16_to_cpu(rp->handle);
2807
2808         hci_dev_lock(hdev);
2809
2810         conn = hci_conn_hash_lookup_handle(hdev, handle);
2811         if (!conn)
2812                 goto unlock;
2813
2814         /* If we fail to read the encryption key size, assume maximum
2815          * (which is the same we do also when this HCI command isn't
2816          * supported.
2817          */
2818         if (rp->status) {
2819                 bt_dev_err(hdev, "failed to read key size for handle %u",
2820                            handle);
2821                 conn->enc_key_size = HCI_LINK_KEY_SIZE;
2822         } else {
2823                 conn->enc_key_size = rp->key_size;
2824         }
2825
2826         if (conn->state == BT_CONFIG) {
2827                 conn->state = BT_CONNECTED;
2828                 hci_connect_cfm(conn, 0);
2829                 hci_conn_drop(conn);
2830         } else {
2831                 u8 encrypt;
2832
2833                 if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2834                         encrypt = 0x00;
2835                 else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
2836                         encrypt = 0x02;
2837                 else
2838                         encrypt = 0x01;
2839
2840                 hci_encrypt_cfm(conn, 0, encrypt);
2841         }
2842
2843 unlock:
2844         hci_dev_unlock(hdev);
2845 }
2846
2847 static void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
2848 {
2849         struct hci_ev_encrypt_change *ev = (void *) skb->data;
2850         struct hci_conn *conn;
2851
2852         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
2853
2854         hci_dev_lock(hdev);
2855
2856         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
2857         if (!conn)
2858                 goto unlock;
2859
2860         if (!ev->status) {
2861                 if (ev->encrypt) {
2862                         /* Encryption implies authentication */
2863                         set_bit(HCI_CONN_AUTH, &conn->flags);
2864                         set_bit(HCI_CONN_ENCRYPT, &conn->flags);
2865                         conn->sec_level = conn->pending_sec_level;
2866
2867                         /* P-256 authentication key implies FIPS */
2868                         if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
2869                                 set_bit(HCI_CONN_FIPS, &conn->flags);
2870
2871                         if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
2872                             conn->type == LE_LINK)
2873                                 set_bit(HCI_CONN_AES_CCM, &conn->flags);
2874                 } else {
2875                         clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
2876                         clear_bit(HCI_CONN_AES_CCM, &conn->flags);
2877                 }
2878         }
2879
2880         /* We should disregard the current RPA and generate a new one
2881          * whenever the encryption procedure fails.
2882          */
2883         if (ev->status && conn->type == LE_LINK) {
2884                 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
2885                 hci_adv_instances_set_rpa_expired(hdev, true);
2886         }
2887
2888         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
2889
2890         if (ev->status && conn->state == BT_CONNECTED) {
2891                 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
2892                         set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
2893
2894                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2895                 hci_conn_drop(conn);
2896                 goto unlock;
2897         }
2898
2899         /* In Secure Connections Only mode, do not allow any connections
2900          * that are not encrypted with AES-CCM using a P-256 authenticated
2901          * combination key.
2902          */
2903         if (hci_dev_test_flag(hdev, HCI_SC_ONLY) &&
2904             (!test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
2905              conn->key_type != HCI_LK_AUTH_COMBINATION_P256)) {
2906                 hci_connect_cfm(conn, HCI_ERROR_AUTH_FAILURE);
2907                 hci_conn_drop(conn);
2908                 goto unlock;
2909         }
2910
2911         /* Try reading the encryption key size for encrypted ACL links */
2912         if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
2913                 struct hci_cp_read_enc_key_size cp;
2914                 struct hci_request req;
2915
2916                 /* Only send HCI_Read_Encryption_Key_Size if the
2917                  * controller really supports it. If it doesn't, assume
2918                  * the default size (16).
2919                  */
2920                 if (!(hdev->commands[20] & 0x10)) {
2921                         conn->enc_key_size = HCI_LINK_KEY_SIZE;
2922                         goto notify;
2923                 }
2924
2925                 hci_req_init(&req, hdev);
2926
2927                 cp.handle = cpu_to_le16(conn->handle);
2928                 hci_req_add(&req, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp);
2929
2930                 if (hci_req_run_skb(&req, read_enc_key_size_complete)) {
2931                         bt_dev_err(hdev, "sending read key size failed");
2932                         conn->enc_key_size = HCI_LINK_KEY_SIZE;
2933                         goto notify;
2934                 }
2935
2936                 goto unlock;
2937         }
2938
2939 notify:
2940         if (conn->state == BT_CONFIG) {
2941                 if (!ev->status)
2942                         conn->state = BT_CONNECTED;
2943
2944                 hci_connect_cfm(conn, ev->status);
2945                 hci_conn_drop(conn);
2946         } else
2947                 hci_encrypt_cfm(conn, ev->status, ev->encrypt);
2948
2949 unlock:
2950         hci_dev_unlock(hdev);
2951 }
2952
2953 static void hci_change_link_key_complete_evt(struct hci_dev *hdev,
2954                                              struct sk_buff *skb)
2955 {
2956         struct hci_ev_change_link_key_complete *ev = (void *) skb->data;
2957         struct hci_conn *conn;
2958
2959         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
2960
2961         hci_dev_lock(hdev);
2962
2963         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
2964         if (conn) {
2965                 if (!ev->status)
2966                         set_bit(HCI_CONN_SECURE, &conn->flags);
2967
2968                 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
2969
2970                 hci_key_change_cfm(conn, ev->status);
2971         }
2972
2973         hci_dev_unlock(hdev);
2974 }
2975
2976 static void hci_remote_features_evt(struct hci_dev *hdev,
2977                                     struct sk_buff *skb)
2978 {
2979         struct hci_ev_remote_features *ev = (void *) skb->data;
2980         struct hci_conn *conn;
2981
2982         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
2983
2984         hci_dev_lock(hdev);
2985
2986         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
2987         if (!conn)
2988                 goto unlock;
2989
2990         if (!ev->status)
2991                 memcpy(conn->features[0], ev->features, 8);
2992
2993         if (conn->state != BT_CONFIG)
2994                 goto unlock;
2995
2996         if (!ev->status && lmp_ext_feat_capable(hdev) &&
2997             lmp_ext_feat_capable(conn)) {
2998                 struct hci_cp_read_remote_ext_features cp;
2999                 cp.handle = ev->handle;
3000                 cp.page = 0x01;
3001                 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3002                              sizeof(cp), &cp);
3003                 goto unlock;
3004         }
3005
3006         if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
3007                 struct hci_cp_remote_name_req cp;
3008                 memset(&cp, 0, sizeof(cp));
3009                 bacpy(&cp.bdaddr, &conn->dst);
3010                 cp.pscan_rep_mode = 0x02;
3011                 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3012         } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
3013                 mgmt_device_connected(hdev, conn, 0, NULL, 0);
3014
3015         if (!hci_outgoing_auth_needed(hdev, conn)) {
3016                 conn->state = BT_CONNECTED;
3017                 hci_connect_cfm(conn, ev->status);
3018                 hci_conn_drop(conn);
3019         }
3020
3021 unlock:
3022         hci_dev_unlock(hdev);
3023 }
3024
3025 static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
3026                                  u16 *opcode, u8 *status,
3027                                  hci_req_complete_t *req_complete,
3028                                  hci_req_complete_skb_t *req_complete_skb)
3029 {
3030         struct hci_ev_cmd_complete *ev = (void *) skb->data;
3031
3032         *opcode = __le16_to_cpu(ev->opcode);
3033         *status = skb->data[sizeof(*ev)];
3034
3035         skb_pull(skb, sizeof(*ev));
3036
3037         switch (*opcode) {
3038         case HCI_OP_INQUIRY_CANCEL:
3039                 hci_cc_inquiry_cancel(hdev, skb);
3040                 break;
3041
3042         case HCI_OP_PERIODIC_INQ:
3043                 hci_cc_periodic_inq(hdev, skb);
3044                 break;
3045
3046         case HCI_OP_EXIT_PERIODIC_INQ:
3047                 hci_cc_exit_periodic_inq(hdev, skb);
3048                 break;
3049
3050         case HCI_OP_REMOTE_NAME_REQ_CANCEL:
3051                 hci_cc_remote_name_req_cancel(hdev, skb);
3052                 break;
3053
3054         case HCI_OP_ROLE_DISCOVERY:
3055                 hci_cc_role_discovery(hdev, skb);
3056                 break;
3057
3058         case HCI_OP_READ_LINK_POLICY:
3059                 hci_cc_read_link_policy(hdev, skb);
3060                 break;
3061
3062         case HCI_OP_WRITE_LINK_POLICY:
3063                 hci_cc_write_link_policy(hdev, skb);
3064                 break;
3065
3066         case HCI_OP_READ_DEF_LINK_POLICY:
3067                 hci_cc_read_def_link_policy(hdev, skb);
3068                 break;
3069
3070         case HCI_OP_WRITE_DEF_LINK_POLICY:
3071                 hci_cc_write_def_link_policy(hdev, skb);
3072                 break;
3073
3074         case HCI_OP_RESET:
3075                 hci_cc_reset(hdev, skb);
3076                 break;
3077
3078         case HCI_OP_READ_STORED_LINK_KEY:
3079                 hci_cc_read_stored_link_key(hdev, skb);
3080                 break;
3081
3082         case HCI_OP_DELETE_STORED_LINK_KEY:
3083                 hci_cc_delete_stored_link_key(hdev, skb);
3084                 break;
3085
3086         case HCI_OP_WRITE_LOCAL_NAME:
3087                 hci_cc_write_local_name(hdev, skb);
3088                 break;
3089
3090         case HCI_OP_READ_LOCAL_NAME:
3091                 hci_cc_read_local_name(hdev, skb);
3092                 break;
3093
3094         case HCI_OP_WRITE_AUTH_ENABLE:
3095                 hci_cc_write_auth_enable(hdev, skb);
3096                 break;
3097
3098         case HCI_OP_WRITE_ENCRYPT_MODE:
3099                 hci_cc_write_encrypt_mode(hdev, skb);
3100                 break;
3101
3102         case HCI_OP_WRITE_SCAN_ENABLE:
3103                 hci_cc_write_scan_enable(hdev, skb);
3104                 break;
3105
3106         case HCI_OP_READ_CLASS_OF_DEV:
3107                 hci_cc_read_class_of_dev(hdev, skb);
3108                 break;
3109
3110         case HCI_OP_WRITE_CLASS_OF_DEV:
3111                 hci_cc_write_class_of_dev(hdev, skb);
3112                 break;
3113
3114         case HCI_OP_READ_VOICE_SETTING:
3115                 hci_cc_read_voice_setting(hdev, skb);
3116                 break;
3117
3118         case HCI_OP_WRITE_VOICE_SETTING:
3119                 hci_cc_write_voice_setting(hdev, skb);
3120                 break;
3121
3122         case HCI_OP_READ_NUM_SUPPORTED_IAC:
3123                 hci_cc_read_num_supported_iac(hdev, skb);
3124                 break;
3125
3126         case HCI_OP_WRITE_SSP_MODE:
3127                 hci_cc_write_ssp_mode(hdev, skb);
3128                 break;
3129
3130         case HCI_OP_WRITE_SC_SUPPORT:
3131                 hci_cc_write_sc_support(hdev, skb);
3132                 break;
3133
3134         case HCI_OP_READ_LOCAL_VERSION:
3135                 hci_cc_read_local_version(hdev, skb);
3136                 break;
3137
3138         case HCI_OP_READ_LOCAL_COMMANDS:
3139                 hci_cc_read_local_commands(hdev, skb);
3140                 break;
3141
3142         case HCI_OP_READ_LOCAL_FEATURES:
3143                 hci_cc_read_local_features(hdev, skb);
3144                 break;
3145
3146         case HCI_OP_READ_LOCAL_EXT_FEATURES:
3147                 hci_cc_read_local_ext_features(hdev, skb);
3148                 break;
3149
3150         case HCI_OP_READ_BUFFER_SIZE:
3151                 hci_cc_read_buffer_size(hdev, skb);
3152                 break;
3153
3154         case HCI_OP_READ_BD_ADDR:
3155                 hci_cc_read_bd_addr(hdev, skb);
3156                 break;
3157
3158         case HCI_OP_READ_PAGE_SCAN_ACTIVITY:
3159                 hci_cc_read_page_scan_activity(hdev, skb);
3160                 break;
3161
3162         case HCI_OP_WRITE_PAGE_SCAN_ACTIVITY:
3163                 hci_cc_write_page_scan_activity(hdev, skb);
3164                 break;
3165
3166         case HCI_OP_READ_PAGE_SCAN_TYPE:
3167                 hci_cc_read_page_scan_type(hdev, skb);
3168                 break;
3169
3170         case HCI_OP_WRITE_PAGE_SCAN_TYPE:
3171                 hci_cc_write_page_scan_type(hdev, skb);
3172                 break;
3173
3174         case HCI_OP_READ_DATA_BLOCK_SIZE:
3175                 hci_cc_read_data_block_size(hdev, skb);
3176                 break;
3177
3178         case HCI_OP_READ_FLOW_CONTROL_MODE:
3179                 hci_cc_read_flow_control_mode(hdev, skb);
3180                 break;
3181
3182         case HCI_OP_READ_LOCAL_AMP_INFO:
3183                 hci_cc_read_local_amp_info(hdev, skb);
3184                 break;
3185
3186         case HCI_OP_READ_CLOCK:
3187                 hci_cc_read_clock(hdev, skb);
3188                 break;
3189
3190         case HCI_OP_READ_INQ_RSP_TX_POWER:
3191                 hci_cc_read_inq_rsp_tx_power(hdev, skb);
3192                 break;
3193
3194         case HCI_OP_PIN_CODE_REPLY:
3195                 hci_cc_pin_code_reply(hdev, skb);
3196                 break;
3197
3198         case HCI_OP_PIN_CODE_NEG_REPLY:
3199                 hci_cc_pin_code_neg_reply(hdev, skb);
3200                 break;
3201
3202         case HCI_OP_READ_LOCAL_OOB_DATA:
3203                 hci_cc_read_local_oob_data(hdev, skb);
3204                 break;
3205
3206         case HCI_OP_READ_LOCAL_OOB_EXT_DATA:
3207                 hci_cc_read_local_oob_ext_data(hdev, skb);
3208                 break;
3209
3210         case HCI_OP_LE_READ_BUFFER_SIZE:
3211                 hci_cc_le_read_buffer_size(hdev, skb);
3212                 break;
3213
3214         case HCI_OP_LE_READ_LOCAL_FEATURES:
3215                 hci_cc_le_read_local_features(hdev, skb);
3216                 break;
3217
3218         case HCI_OP_LE_READ_ADV_TX_POWER:
3219                 hci_cc_le_read_adv_tx_power(hdev, skb);
3220                 break;
3221
3222         case HCI_OP_USER_CONFIRM_REPLY:
3223                 hci_cc_user_confirm_reply(hdev, skb);
3224                 break;
3225
3226         case HCI_OP_USER_CONFIRM_NEG_REPLY:
3227                 hci_cc_user_confirm_neg_reply(hdev, skb);
3228                 break;
3229
3230         case HCI_OP_USER_PASSKEY_REPLY:
3231                 hci_cc_user_passkey_reply(hdev, skb);
3232                 break;
3233
3234         case HCI_OP_USER_PASSKEY_NEG_REPLY:
3235                 hci_cc_user_passkey_neg_reply(hdev, skb);
3236                 break;
3237
3238         case HCI_OP_LE_SET_RANDOM_ADDR:
3239                 hci_cc_le_set_random_addr(hdev, skb);
3240                 break;
3241
3242         case HCI_OP_LE_SET_ADV_ENABLE:
3243                 hci_cc_le_set_adv_enable(hdev, skb);
3244                 break;
3245
3246         case HCI_OP_LE_SET_SCAN_PARAM:
3247                 hci_cc_le_set_scan_param(hdev, skb);
3248                 break;
3249
3250         case HCI_OP_LE_SET_SCAN_ENABLE:
3251                 hci_cc_le_set_scan_enable(hdev, skb);
3252                 break;
3253
3254         case HCI_OP_LE_READ_WHITE_LIST_SIZE:
3255                 hci_cc_le_read_white_list_size(hdev, skb);
3256                 break;
3257
3258         case HCI_OP_LE_CLEAR_WHITE_LIST:
3259                 hci_cc_le_clear_white_list(hdev, skb);
3260                 break;
3261
3262         case HCI_OP_LE_ADD_TO_WHITE_LIST:
3263                 hci_cc_le_add_to_white_list(hdev, skb);
3264                 break;
3265
3266         case HCI_OP_LE_DEL_FROM_WHITE_LIST:
3267                 hci_cc_le_del_from_white_list(hdev, skb);
3268                 break;
3269
3270         case HCI_OP_LE_READ_SUPPORTED_STATES:
3271                 hci_cc_le_read_supported_states(hdev, skb);
3272                 break;
3273
3274         case HCI_OP_LE_READ_DEF_DATA_LEN:
3275                 hci_cc_le_read_def_data_len(hdev, skb);
3276                 break;
3277
3278         case HCI_OP_LE_WRITE_DEF_DATA_LEN:
3279                 hci_cc_le_write_def_data_len(hdev, skb);
3280                 break;
3281
3282         case HCI_OP_LE_CLEAR_RESOLV_LIST:
3283                 hci_cc_le_clear_resolv_list(hdev, skb);
3284                 break;
3285
3286         case HCI_OP_LE_READ_RESOLV_LIST_SIZE:
3287                 hci_cc_le_read_resolv_list_size(hdev, skb);
3288                 break;
3289
3290         case HCI_OP_LE_SET_ADDR_RESOLV_ENABLE:
3291                 hci_cc_le_set_addr_resolution_enable(hdev, skb);
3292                 break;
3293
3294         case HCI_OP_LE_READ_MAX_DATA_LEN:
3295                 hci_cc_le_read_max_data_len(hdev, skb);
3296                 break;
3297
3298         case HCI_OP_WRITE_LE_HOST_SUPPORTED:
3299                 hci_cc_write_le_host_supported(hdev, skb);
3300                 break;
3301
3302         case HCI_OP_LE_SET_ADV_PARAM:
3303                 hci_cc_set_adv_param(hdev, skb);
3304                 break;
3305
3306         case HCI_OP_READ_RSSI:
3307                 hci_cc_read_rssi(hdev, skb);
3308                 break;
3309
3310         case HCI_OP_READ_TX_POWER:
3311                 hci_cc_read_tx_power(hdev, skb);
3312                 break;
3313
3314         case HCI_OP_WRITE_SSP_DEBUG_MODE:
3315                 hci_cc_write_ssp_debug_mode(hdev, skb);
3316                 break;
3317
3318         case HCI_OP_LE_SET_EXT_SCAN_PARAMS:
3319                 hci_cc_le_set_ext_scan_param(hdev, skb);
3320                 break;
3321
3322         case HCI_OP_LE_SET_EXT_SCAN_ENABLE:
3323                 hci_cc_le_set_ext_scan_enable(hdev, skb);
3324                 break;
3325
3326         case HCI_OP_LE_SET_DEFAULT_PHY:
3327                 hci_cc_le_set_default_phy(hdev, skb);
3328                 break;
3329
3330         case HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS:
3331                 hci_cc_le_read_num_adv_sets(hdev, skb);
3332                 break;
3333
3334         case HCI_OP_LE_SET_EXT_ADV_PARAMS:
3335                 hci_cc_set_ext_adv_param(hdev, skb);
3336                 break;
3337
3338         case HCI_OP_LE_SET_EXT_ADV_ENABLE:
3339                 hci_cc_le_set_ext_adv_enable(hdev, skb);
3340                 break;
3341
3342         case HCI_OP_LE_SET_ADV_SET_RAND_ADDR:
3343                 hci_cc_le_set_adv_set_random_addr(hdev, skb);
3344                 break;
3345
3346         default:
3347                 BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
3348                 break;
3349         }
3350
3351         if (*opcode != HCI_OP_NOP)
3352                 cancel_delayed_work(&hdev->cmd_timer);
3353
3354         if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags))
3355                 atomic_set(&hdev->cmd_cnt, 1);
3356
3357         hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
3358                              req_complete_skb);
3359
3360         if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
3361                 queue_work(hdev->workqueue, &hdev->cmd_work);
3362 }
3363
3364 static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb,
3365                                u16 *opcode, u8 *status,
3366                                hci_req_complete_t *req_complete,
3367                                hci_req_complete_skb_t *req_complete_skb)
3368 {
3369         struct hci_ev_cmd_status *ev = (void *) skb->data;
3370
3371         skb_pull(skb, sizeof(*ev));
3372
3373         *opcode = __le16_to_cpu(ev->opcode);
3374         *status = ev->status;
3375
3376         switch (*opcode) {
3377         case HCI_OP_INQUIRY:
3378                 hci_cs_inquiry(hdev, ev->status);
3379                 break;
3380
3381         case HCI_OP_CREATE_CONN:
3382                 hci_cs_create_conn(hdev, ev->status);
3383                 break;
3384
3385         case HCI_OP_DISCONNECT:
3386                 hci_cs_disconnect(hdev, ev->status);
3387                 break;
3388
3389         case HCI_OP_ADD_SCO:
3390                 hci_cs_add_sco(hdev, ev->status);
3391                 break;
3392
3393         case HCI_OP_AUTH_REQUESTED:
3394                 hci_cs_auth_requested(hdev, ev->status);
3395                 break;
3396
3397         case HCI_OP_SET_CONN_ENCRYPT:
3398                 hci_cs_set_conn_encrypt(hdev, ev->status);
3399                 break;
3400
3401         case HCI_OP_REMOTE_NAME_REQ:
3402                 hci_cs_remote_name_req(hdev, ev->status);
3403                 break;
3404
3405         case HCI_OP_READ_REMOTE_FEATURES:
3406                 hci_cs_read_remote_features(hdev, ev->status);
3407                 break;
3408
3409         case HCI_OP_READ_REMOTE_EXT_FEATURES:
3410                 hci_cs_read_remote_ext_features(hdev, ev->status);
3411                 break;
3412
3413         case HCI_OP_SETUP_SYNC_CONN:
3414                 hci_cs_setup_sync_conn(hdev, ev->status);
3415                 break;
3416
3417         case HCI_OP_SNIFF_MODE:
3418                 hci_cs_sniff_mode(hdev, ev->status);
3419                 break;
3420
3421         case HCI_OP_EXIT_SNIFF_MODE:
3422                 hci_cs_exit_sniff_mode(hdev, ev->status);
3423                 break;
3424
3425         case HCI_OP_SWITCH_ROLE:
3426                 hci_cs_switch_role(hdev, ev->status);
3427                 break;
3428
3429         case HCI_OP_LE_CREATE_CONN:
3430                 hci_cs_le_create_conn(hdev, ev->status);
3431                 break;
3432
3433         case HCI_OP_LE_READ_REMOTE_FEATURES:
3434                 hci_cs_le_read_remote_features(hdev, ev->status);
3435                 break;
3436
3437         case HCI_OP_LE_START_ENC:
3438                 hci_cs_le_start_enc(hdev, ev->status);
3439                 break;
3440
3441         case HCI_OP_LE_EXT_CREATE_CONN:
3442                 hci_cs_le_ext_create_conn(hdev, ev->status);
3443                 break;
3444
3445         default:
3446                 BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
3447                 break;
3448         }
3449
3450         if (*opcode != HCI_OP_NOP)
3451                 cancel_delayed_work(&hdev->cmd_timer);
3452
3453         if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags))
3454                 atomic_set(&hdev->cmd_cnt, 1);
3455
3456         /* Indicate request completion if the command failed. Also, if
3457          * we're not waiting for a special event and we get a success
3458          * command status we should try to flag the request as completed
3459          * (since for this kind of commands there will not be a command
3460          * complete event).
3461          */
3462         if (ev->status ||
3463             (hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->hci.req_event))
3464                 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
3465                                      req_complete_skb);
3466
3467         if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
3468                 queue_work(hdev->workqueue, &hdev->cmd_work);
3469 }
3470
3471 static void hci_hardware_error_evt(struct hci_dev *hdev, struct sk_buff *skb)
3472 {
3473         struct hci_ev_hardware_error *ev = (void *) skb->data;
3474
3475         hdev->hw_error_code = ev->code;
3476
3477         queue_work(hdev->req_workqueue, &hdev->error_reset);
3478 }
3479
3480 static void hci_role_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
3481 {
3482         struct hci_ev_role_change *ev = (void *) skb->data;
3483         struct hci_conn *conn;
3484
3485         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
3486
3487         hci_dev_lock(hdev);
3488
3489         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3490         if (conn) {
3491                 if (!ev->status)
3492                         conn->role = ev->role;
3493
3494                 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
3495
3496                 hci_role_switch_cfm(conn, ev->status, ev->role);
3497         }
3498
3499         hci_dev_unlock(hdev);
3500 }
3501
3502 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *skb)
3503 {
3504         struct hci_ev_num_comp_pkts *ev = (void *) skb->data;
3505         int i;
3506
3507         if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_PACKET_BASED) {
3508                 bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode);
3509                 return;
3510         }
3511
3512         if (skb->len < sizeof(*ev) || skb->len < sizeof(*ev) +
3513             ev->num_hndl * sizeof(struct hci_comp_pkts_info)) {
3514                 BT_DBG("%s bad parameters", hdev->name);
3515                 return;
3516         }
3517
3518         BT_DBG("%s num_hndl %d", hdev->name, ev->num_hndl);
3519
3520         for (i = 0; i < ev->num_hndl; i++) {
3521                 struct hci_comp_pkts_info *info = &ev->handles[i];
3522                 struct hci_conn *conn;
3523                 __u16  handle, count;
3524
3525                 handle = __le16_to_cpu(info->handle);
3526                 count  = __le16_to_cpu(info->count);
3527
3528                 conn = hci_conn_hash_lookup_handle(hdev, handle);
3529                 if (!conn)
3530                         continue;
3531
3532                 conn->sent -= count;
3533
3534                 switch (conn->type) {
3535                 case ACL_LINK:
3536                         hdev->acl_cnt += count;
3537                         if (hdev->acl_cnt > hdev->acl_pkts)
3538                                 hdev->acl_cnt = hdev->acl_pkts;
3539                         break;
3540
3541                 case LE_LINK:
3542                         if (hdev->le_pkts) {
3543                                 hdev->le_cnt += count;
3544                                 if (hdev->le_cnt > hdev->le_pkts)
3545                                         hdev->le_cnt = hdev->le_pkts;
3546                         } else {
3547                                 hdev->acl_cnt += count;
3548                                 if (hdev->acl_cnt > hdev->acl_pkts)
3549                                         hdev->acl_cnt = hdev->acl_pkts;
3550                         }
3551                         break;
3552
3553                 case SCO_LINK:
3554                         hdev->sco_cnt += count;
3555                         if (hdev->sco_cnt > hdev->sco_pkts)
3556                                 hdev->sco_cnt = hdev->sco_pkts;
3557                         break;
3558
3559                 default:
3560                         bt_dev_err(hdev, "unknown type %d conn %p",
3561                                    conn->type, conn);
3562                         break;
3563                 }
3564         }
3565
3566         queue_work(hdev->workqueue, &hdev->tx_work);
3567 }
3568
3569 static struct hci_conn *__hci_conn_lookup_handle(struct hci_dev *hdev,
3570                                                  __u16 handle)
3571 {
3572         struct hci_chan *chan;
3573
3574         switch (hdev->dev_type) {
3575         case HCI_PRIMARY:
3576                 return hci_conn_hash_lookup_handle(hdev, handle);
3577         case HCI_AMP:
3578                 chan = hci_chan_lookup_handle(hdev, handle);
3579                 if (chan)
3580                         return chan->conn;
3581                 break;
3582         default:
3583                 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3584                 break;
3585         }
3586
3587         return NULL;
3588 }
3589
3590 static void hci_num_comp_blocks_evt(struct hci_dev *hdev, struct sk_buff *skb)
3591 {
3592         struct hci_ev_num_comp_blocks *ev = (void *) skb->data;
3593         int i;
3594
3595         if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_BLOCK_BASED) {
3596                 bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode);
3597                 return;
3598         }
3599
3600         if (skb->len < sizeof(*ev) || skb->len < sizeof(*ev) +
3601             ev->num_hndl * sizeof(struct hci_comp_blocks_info)) {
3602                 BT_DBG("%s bad parameters", hdev->name);
3603                 return;
3604         }
3605
3606         BT_DBG("%s num_blocks %d num_hndl %d", hdev->name, ev->num_blocks,
3607                ev->num_hndl);
3608
3609         for (i = 0; i < ev->num_hndl; i++) {
3610                 struct hci_comp_blocks_info *info = &ev->handles[i];
3611                 struct hci_conn *conn = NULL;
3612                 __u16  handle, block_count;
3613
3614                 handle = __le16_to_cpu(info->handle);
3615                 block_count = __le16_to_cpu(info->blocks);
3616
3617                 conn = __hci_conn_lookup_handle(hdev, handle);
3618                 if (!conn)
3619                         continue;
3620
3621                 conn->sent -= block_count;
3622
3623                 switch (conn->type) {
3624                 case ACL_LINK:
3625                 case AMP_LINK:
3626                         hdev->block_cnt += block_count;
3627                         if (hdev->block_cnt > hdev->num_blocks)
3628                                 hdev->block_cnt = hdev->num_blocks;
3629                         break;
3630
3631                 default:
3632                         bt_dev_err(hdev, "unknown type %d conn %p",
3633                                    conn->type, conn);
3634                         break;
3635                 }
3636         }
3637
3638         queue_work(hdev->workqueue, &hdev->tx_work);
3639 }
3640
3641 static void hci_mode_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
3642 {
3643         struct hci_ev_mode_change *ev = (void *) skb->data;
3644         struct hci_conn *conn;
3645
3646         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
3647
3648         hci_dev_lock(hdev);
3649
3650         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3651         if (conn) {
3652                 conn->mode = ev->mode;
3653
3654                 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
3655                                         &conn->flags)) {
3656                         if (conn->mode == HCI_CM_ACTIVE)
3657                                 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
3658                         else
3659                                 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
3660                 }
3661
3662                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
3663                         hci_sco_setup(conn, ev->status);
3664         }
3665
3666         hci_dev_unlock(hdev);
3667 }
3668
3669 static void hci_pin_code_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
3670 {
3671         struct hci_ev_pin_code_req *ev = (void *) skb->data;
3672         struct hci_conn *conn;
3673
3674         BT_DBG("%s", hdev->name);
3675
3676         hci_dev_lock(hdev);
3677
3678         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3679         if (!conn)
3680                 goto unlock;
3681
3682         if (conn->state == BT_CONNECTED) {
3683                 hci_conn_hold(conn);
3684                 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3685                 hci_conn_drop(conn);
3686         }
3687
3688         if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
3689             !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
3690                 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
3691                              sizeof(ev->bdaddr), &ev->bdaddr);
3692         } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
3693                 u8 secure;
3694
3695                 if (conn->pending_sec_level == BT_SECURITY_HIGH)
3696                         secure = 1;
3697                 else
3698                         secure = 0;
3699
3700                 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
3701         }
3702
3703 unlock:
3704         hci_dev_unlock(hdev);
3705 }
3706
3707 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
3708 {
3709         if (key_type == HCI_LK_CHANGED_COMBINATION)
3710                 return;
3711
3712         conn->pin_length = pin_len;
3713         conn->key_type = key_type;
3714
3715         switch (key_type) {
3716         case HCI_LK_LOCAL_UNIT:
3717         case HCI_LK_REMOTE_UNIT:
3718         case HCI_LK_DEBUG_COMBINATION:
3719                 return;
3720         case HCI_LK_COMBINATION:
3721                 if (pin_len == 16)
3722                         conn->pending_sec_level = BT_SECURITY_HIGH;
3723                 else
3724                         conn->pending_sec_level = BT_SECURITY_MEDIUM;
3725                 break;
3726         case HCI_LK_UNAUTH_COMBINATION_P192:
3727         case HCI_LK_UNAUTH_COMBINATION_P256:
3728                 conn->pending_sec_level = BT_SECURITY_MEDIUM;
3729                 break;
3730         case HCI_LK_AUTH_COMBINATION_P192:
3731                 conn->pending_sec_level = BT_SECURITY_HIGH;
3732                 break;
3733         case HCI_LK_AUTH_COMBINATION_P256:
3734                 conn->pending_sec_level = BT_SECURITY_FIPS;
3735                 break;
3736         }
3737 }
3738
3739 static void hci_link_key_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
3740 {
3741         struct hci_ev_link_key_req *ev = (void *) skb->data;
3742         struct hci_cp_link_key_reply cp;
3743         struct hci_conn *conn;
3744         struct link_key *key;
3745
3746         BT_DBG("%s", hdev->name);
3747
3748         if (!hci_dev_test_flag(hdev, HCI_MGMT))
3749                 return;
3750
3751         hci_dev_lock(hdev);
3752
3753         key = hci_find_link_key(hdev, &ev->bdaddr);
3754         if (!key) {
3755                 BT_DBG("%s link key not found for %pMR", hdev->name,
3756                        &ev->bdaddr);
3757                 goto not_found;
3758         }
3759
3760         BT_DBG("%s found key type %u for %pMR", hdev->name, key->type,
3761                &ev->bdaddr);
3762
3763         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3764         if (conn) {
3765                 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
3766
3767                 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
3768                      key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
3769                     conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
3770                         BT_DBG("%s ignoring unauthenticated key", hdev->name);
3771                         goto not_found;
3772                 }
3773
3774                 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
3775                     (conn->pending_sec_level == BT_SECURITY_HIGH ||
3776                      conn->pending_sec_level == BT_SECURITY_FIPS)) {
3777                         BT_DBG("%s ignoring key unauthenticated for high security",
3778                                hdev->name);
3779                         goto not_found;
3780                 }
3781
3782                 conn_set_key(conn, key->type, key->pin_len);
3783         }
3784
3785         bacpy(&cp.bdaddr, &ev->bdaddr);
3786         memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
3787
3788         hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
3789
3790         hci_dev_unlock(hdev);
3791
3792         return;
3793
3794 not_found:
3795         hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
3796         hci_dev_unlock(hdev);
3797 }
3798
3799 static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
3800 {
3801         struct hci_ev_link_key_notify *ev = (void *) skb->data;
3802         struct hci_conn *conn;
3803         struct link_key *key;
3804         bool persistent;
3805         u8 pin_len = 0;
3806
3807         BT_DBG("%s", hdev->name);
3808
3809         hci_dev_lock(hdev);
3810
3811         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3812         if (!conn)
3813                 goto unlock;
3814
3815         hci_conn_hold(conn);
3816         conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3817         hci_conn_drop(conn);
3818
3819         set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
3820         conn_set_key(conn, ev->key_type, conn->pin_length);
3821
3822         if (!hci_dev_test_flag(hdev, HCI_MGMT))
3823                 goto unlock;
3824
3825         key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
3826                                 ev->key_type, pin_len, &persistent);
3827         if (!key)
3828                 goto unlock;
3829
3830         /* Update connection information since adding the key will have
3831          * fixed up the type in the case of changed combination keys.
3832          */
3833         if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
3834                 conn_set_key(conn, key->type, key->pin_len);
3835
3836         mgmt_new_link_key(hdev, key, persistent);
3837
3838         /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
3839          * is set. If it's not set simply remove the key from the kernel
3840          * list (we've still notified user space about it but with
3841          * store_hint being 0).
3842          */
3843         if (key->type == HCI_LK_DEBUG_COMBINATION &&
3844             !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
3845                 list_del_rcu(&key->list);
3846                 kfree_rcu(key, rcu);
3847                 goto unlock;
3848         }
3849
3850         if (persistent)
3851                 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
3852         else
3853                 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
3854
3855 unlock:
3856         hci_dev_unlock(hdev);
3857 }
3858
3859 static void hci_clock_offset_evt(struct hci_dev *hdev, struct sk_buff *skb)
3860 {
3861         struct hci_ev_clock_offset *ev = (void *) skb->data;
3862         struct hci_conn *conn;
3863
3864         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
3865
3866         hci_dev_lock(hdev);
3867
3868         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3869         if (conn && !ev->status) {
3870                 struct inquiry_entry *ie;
3871
3872                 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
3873                 if (ie) {
3874                         ie->data.clock_offset = ev->clock_offset;
3875                         ie->timestamp = jiffies;
3876                 }
3877         }
3878
3879         hci_dev_unlock(hdev);
3880 }
3881
3882 static void hci_pkt_type_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
3883 {
3884         struct hci_ev_pkt_type_change *ev = (void *) skb->data;
3885         struct hci_conn *conn;
3886
3887         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
3888
3889         hci_dev_lock(hdev);
3890
3891         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3892         if (conn && !ev->status)
3893                 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
3894
3895         hci_dev_unlock(hdev);
3896 }
3897
3898 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, struct sk_buff *skb)
3899 {
3900         struct hci_ev_pscan_rep_mode *ev = (void *) skb->data;
3901         struct inquiry_entry *ie;
3902
3903         BT_DBG("%s", hdev->name);
3904
3905         hci_dev_lock(hdev);
3906
3907         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3908         if (ie) {
3909                 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
3910                 ie->timestamp = jiffies;
3911         }
3912
3913         hci_dev_unlock(hdev);
3914 }
3915
3916 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev,
3917                                              struct sk_buff *skb)
3918 {
3919         struct inquiry_data data;
3920         int num_rsp = *((__u8 *) skb->data);
3921
3922         BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
3923
3924         if (!num_rsp)
3925                 return;
3926
3927         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3928                 return;
3929
3930         hci_dev_lock(hdev);
3931
3932         if ((skb->len - 1) / num_rsp != sizeof(struct inquiry_info_with_rssi)) {
3933                 struct inquiry_info_with_rssi_and_pscan_mode *info;
3934                 info = (void *) (skb->data + 1);
3935
3936                 for (; num_rsp; num_rsp--, info++) {
3937                         u32 flags;
3938
3939                         bacpy(&data.bdaddr, &info->bdaddr);
3940                         data.pscan_rep_mode     = info->pscan_rep_mode;
3941                         data.pscan_period_mode  = info->pscan_period_mode;
3942                         data.pscan_mode         = info->pscan_mode;
3943                         memcpy(data.dev_class, info->dev_class, 3);
3944                         data.clock_offset       = info->clock_offset;
3945                         data.rssi               = info->rssi;
3946                         data.ssp_mode           = 0x00;
3947
3948                         flags = hci_inquiry_cache_update(hdev, &data, false);
3949
3950                         mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3951                                           info->dev_class, info->rssi,
3952                                           flags, NULL, 0, NULL, 0);
3953                 }
3954         } else {
3955                 struct inquiry_info_with_rssi *info = (void *) (skb->data + 1);
3956
3957                 for (; num_rsp; num_rsp--, info++) {
3958                         u32 flags;
3959
3960                         bacpy(&data.bdaddr, &info->bdaddr);
3961                         data.pscan_rep_mode     = info->pscan_rep_mode;
3962                         data.pscan_period_mode  = info->pscan_period_mode;
3963                         data.pscan_mode         = 0x00;
3964                         memcpy(data.dev_class, info->dev_class, 3);
3965                         data.clock_offset       = info->clock_offset;
3966                         data.rssi               = info->rssi;
3967                         data.ssp_mode           = 0x00;
3968
3969                         flags = hci_inquiry_cache_update(hdev, &data, false);
3970
3971                         mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3972                                           info->dev_class, info->rssi,
3973                                           flags, NULL, 0, NULL, 0);
3974                 }
3975         }
3976
3977         hci_dev_unlock(hdev);
3978 }
3979
3980 static void hci_remote_ext_features_evt(struct hci_dev *hdev,
3981                                         struct sk_buff *skb)
3982 {
3983         struct hci_ev_remote_ext_features *ev = (void *) skb->data;
3984         struct hci_conn *conn;
3985
3986         BT_DBG("%s", hdev->name);
3987
3988         hci_dev_lock(hdev);
3989
3990         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3991         if (!conn)
3992                 goto unlock;
3993
3994         if (ev->page < HCI_MAX_PAGES)
3995                 memcpy(conn->features[ev->page], ev->features, 8);
3996
3997         if (!ev->status && ev->page == 0x01) {
3998                 struct inquiry_entry *ie;
3999
4000                 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4001                 if (ie)
4002                         ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4003
4004                 if (ev->features[0] & LMP_HOST_SSP) {
4005                         set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4006                 } else {
4007                         /* It is mandatory by the Bluetooth specification that
4008                          * Extended Inquiry Results are only used when Secure
4009                          * Simple Pairing is enabled, but some devices violate
4010                          * this.
4011                          *
4012                          * To make these devices work, the internal SSP
4013                          * enabled flag needs to be cleared if the remote host
4014                          * features do not indicate SSP support */
4015                         clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4016                 }
4017
4018                 if (ev->features[0] & LMP_HOST_SC)
4019                         set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4020         }
4021
4022         if (conn->state != BT_CONFIG)
4023                 goto unlock;
4024
4025         if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4026                 struct hci_cp_remote_name_req cp;
4027                 memset(&cp, 0, sizeof(cp));
4028                 bacpy(&cp.bdaddr, &conn->dst);
4029                 cp.pscan_rep_mode = 0x02;
4030                 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4031         } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
4032                 mgmt_device_connected(hdev, conn, 0, NULL, 0);
4033
4034         if (!hci_outgoing_auth_needed(hdev, conn)) {
4035                 conn->state = BT_CONNECTED;
4036                 hci_connect_cfm(conn, ev->status);
4037                 hci_conn_drop(conn);
4038         }
4039
4040 unlock:
4041         hci_dev_unlock(hdev);
4042 }
4043
4044 static void hci_sync_conn_complete_evt(struct hci_dev *hdev,
4045                                        struct sk_buff *skb)
4046 {
4047         struct hci_ev_sync_conn_complete *ev = (void *) skb->data;
4048         struct hci_conn *conn;
4049
4050         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
4051
4052         hci_dev_lock(hdev);
4053
4054         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4055         if (!conn) {
4056                 if (ev->link_type == ESCO_LINK)
4057                         goto unlock;
4058
4059                 /* When the link type in the event indicates SCO connection
4060                  * and lookup of the connection object fails, then check
4061                  * if an eSCO connection object exists.
4062                  *
4063                  * The core limits the synchronous connections to either
4064                  * SCO or eSCO. The eSCO connection is preferred and tried
4065                  * to be setup first and until successfully established,
4066                  * the link type will be hinted as eSCO.
4067                  */
4068                 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4069                 if (!conn)
4070                         goto unlock;
4071         }
4072
4073         switch (ev->status) {
4074         case 0x00:
4075                 conn->handle = __le16_to_cpu(ev->handle);
4076                 conn->state  = BT_CONNECTED;
4077                 conn->type   = ev->link_type;
4078
4079                 hci_debugfs_create_conn(conn);
4080                 hci_conn_add_sysfs(conn);
4081                 break;
4082
4083         case 0x10:      /* Connection Accept Timeout */
4084         case 0x0d:      /* Connection Rejected due to Limited Resources */
4085         case 0x11:      /* Unsupported Feature or Parameter Value */
4086         case 0x1c:      /* SCO interval rejected */
4087         case 0x1a:      /* Unsupported Remote Feature */
4088         case 0x1f:      /* Unspecified error */
4089         case 0x20:      /* Unsupported LMP Parameter value */
4090                 if (conn->out) {
4091                         conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4092                                         (hdev->esco_type & EDR_ESCO_MASK);
4093                         if (hci_setup_sync(conn, conn->link->handle))
4094                                 goto unlock;
4095                 }
4096                 /* fall through */
4097
4098         default:
4099                 conn->state = BT_CLOSED;
4100                 break;
4101         }
4102
4103         hci_connect_cfm(conn, ev->status);
4104         if (ev->status)
4105                 hci_conn_del(conn);
4106
4107 unlock:
4108         hci_dev_unlock(hdev);
4109 }
4110
4111 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
4112 {
4113         size_t parsed = 0;
4114
4115         while (parsed < eir_len) {
4116                 u8 field_len = eir[0];
4117
4118                 if (field_len == 0)
4119                         return parsed;
4120
4121                 parsed += field_len + 1;
4122                 eir += field_len + 1;
4123         }
4124
4125         return eir_len;
4126 }
4127
4128 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev,
4129                                             struct sk_buff *skb)
4130 {
4131         struct inquiry_data data;
4132         struct extended_inquiry_info *info = (void *) (skb->data + 1);
4133         int num_rsp = *((__u8 *) skb->data);
4134         size_t eir_len;
4135
4136         BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
4137
4138         if (!num_rsp)
4139                 return;
4140
4141         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4142                 return;
4143
4144         hci_dev_lock(hdev);
4145
4146         for (; num_rsp; num_rsp--, info++) {
4147                 u32 flags;
4148                 bool name_known;
4149
4150                 bacpy(&data.bdaddr, &info->bdaddr);
4151                 data.pscan_rep_mode     = info->pscan_rep_mode;
4152                 data.pscan_period_mode  = info->pscan_period_mode;
4153                 data.pscan_mode         = 0x00;
4154                 memcpy(data.dev_class, info->dev_class, 3);
4155                 data.clock_offset       = info->clock_offset;
4156                 data.rssi               = info->rssi;
4157                 data.ssp_mode           = 0x01;
4158
4159                 if (hci_dev_test_flag(hdev, HCI_MGMT))
4160                         name_known = eir_get_data(info->data,
4161                                                   sizeof(info->data),
4162                                                   EIR_NAME_COMPLETE, NULL);
4163                 else
4164                         name_known = true;
4165
4166                 flags = hci_inquiry_cache_update(hdev, &data, name_known);
4167
4168                 eir_len = eir_get_length(info->data, sizeof(info->data));
4169
4170                 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4171                                   info->dev_class, info->rssi,
4172                                   flags, info->data, eir_len, NULL, 0);
4173         }
4174
4175         hci_dev_unlock(hdev);
4176 }
4177
4178 static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
4179                                          struct sk_buff *skb)
4180 {
4181         struct hci_ev_key_refresh_complete *ev = (void *) skb->data;
4182         struct hci_conn *conn;
4183
4184         BT_DBG("%s status 0x%2.2x handle 0x%4.4x", hdev->name, ev->status,
4185                __le16_to_cpu(ev->handle));
4186
4187         hci_dev_lock(hdev);
4188
4189         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4190         if (!conn)
4191                 goto unlock;
4192
4193         /* For BR/EDR the necessary steps are taken through the
4194          * auth_complete event.
4195          */
4196         if (conn->type != LE_LINK)
4197                 goto unlock;
4198
4199         if (!ev->status)
4200                 conn->sec_level = conn->pending_sec_level;
4201
4202         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
4203
4204         if (ev->status && conn->state == BT_CONNECTED) {
4205                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4206                 hci_conn_drop(conn);
4207                 goto unlock;
4208         }
4209
4210         if (conn->state == BT_CONFIG) {
4211                 if (!ev->status)
4212                         conn->state = BT_CONNECTED;
4213
4214                 hci_connect_cfm(conn, ev->status);
4215                 hci_conn_drop(conn);
4216         } else {
4217                 hci_auth_cfm(conn, ev->status);
4218
4219                 hci_conn_hold(conn);
4220                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4221                 hci_conn_drop(conn);
4222         }
4223
4224 unlock:
4225         hci_dev_unlock(hdev);
4226 }
4227
4228 static u8 hci_get_auth_req(struct hci_conn *conn)
4229 {
4230         /* If remote requests no-bonding follow that lead */
4231         if (conn->remote_auth == HCI_AT_NO_BONDING ||
4232             conn->remote_auth == HCI_AT_NO_BONDING_MITM)
4233                 return conn->remote_auth | (conn->auth_type & 0x01);
4234
4235         /* If both remote and local have enough IO capabilities, require
4236          * MITM protection
4237          */
4238         if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
4239             conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
4240                 return conn->remote_auth | 0x01;
4241
4242         /* No MITM protection possible so ignore remote requirement */
4243         return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
4244 }
4245
4246 static u8 bredr_oob_data_present(struct hci_conn *conn)
4247 {
4248         struct hci_dev *hdev = conn->hdev;
4249         struct oob_data *data;
4250
4251         data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
4252         if (!data)
4253                 return 0x00;
4254
4255         if (bredr_sc_enabled(hdev)) {
4256                 /* When Secure Connections is enabled, then just
4257                  * return the present value stored with the OOB
4258                  * data. The stored value contains the right present
4259                  * information. However it can only be trusted when
4260                  * not in Secure Connection Only mode.
4261                  */
4262                 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
4263                         return data->present;
4264
4265                 /* When Secure Connections Only mode is enabled, then
4266                  * the P-256 values are required. If they are not
4267                  * available, then do not declare that OOB data is
4268                  * present.
4269                  */
4270                 if (!memcmp(data->rand256, ZERO_KEY, 16) ||
4271                     !memcmp(data->hash256, ZERO_KEY, 16))
4272                         return 0x00;
4273
4274                 return 0x02;
4275         }
4276
4277         /* When Secure Connections is not enabled or actually
4278          * not supported by the hardware, then check that if
4279          * P-192 data values are present.
4280          */
4281         if (!memcmp(data->rand192, ZERO_KEY, 16) ||
4282             !memcmp(data->hash192, ZERO_KEY, 16))
4283                 return 0x00;
4284
4285         return 0x01;
4286 }
4287
4288 static void hci_io_capa_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
4289 {
4290         struct hci_ev_io_capa_request *ev = (void *) skb->data;
4291         struct hci_conn *conn;
4292
4293         BT_DBG("%s", hdev->name);
4294
4295         hci_dev_lock(hdev);
4296
4297         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4298         if (!conn)
4299                 goto unlock;
4300
4301         hci_conn_hold(conn);
4302
4303         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4304                 goto unlock;
4305
4306         /* Allow pairing if we're pairable, the initiators of the
4307          * pairing or if the remote is not requesting bonding.
4308          */
4309         if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
4310             test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
4311             (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
4312                 struct hci_cp_io_capability_reply cp;
4313
4314                 bacpy(&cp.bdaddr, &ev->bdaddr);
4315                 /* Change the IO capability from KeyboardDisplay
4316                  * to DisplayYesNo as it is not supported by BT spec. */
4317                 cp.capability = (conn->io_capability == 0x04) ?
4318                                 HCI_IO_DISPLAY_YESNO : conn->io_capability;
4319
4320                 /* If we are initiators, there is no remote information yet */
4321                 if (conn->remote_auth == 0xff) {
4322                         /* Request MITM protection if our IO caps allow it
4323                          * except for the no-bonding case.
4324                          */
4325                         if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
4326                             conn->auth_type != HCI_AT_NO_BONDING)
4327                                 conn->auth_type |= 0x01;
4328                 } else {
4329                         conn->auth_type = hci_get_auth_req(conn);
4330                 }
4331
4332                 /* If we're not bondable, force one of the non-bondable
4333                  * authentication requirement values.
4334                  */
4335                 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
4336                         conn->auth_type &= HCI_AT_NO_BONDING_MITM;
4337
4338                 cp.authentication = conn->auth_type;
4339                 cp.oob_data = bredr_oob_data_present(conn);
4340
4341                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
4342                              sizeof(cp), &cp);
4343         } else {
4344                 struct hci_cp_io_capability_neg_reply cp;
4345
4346                 bacpy(&cp.bdaddr, &ev->bdaddr);
4347                 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
4348
4349                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
4350                              sizeof(cp), &cp);
4351         }
4352
4353 unlock:
4354         hci_dev_unlock(hdev);
4355 }
4356
4357 static void hci_io_capa_reply_evt(struct hci_dev *hdev, struct sk_buff *skb)
4358 {
4359         struct hci_ev_io_capa_reply *ev = (void *) skb->data;
4360         struct hci_conn *conn;
4361
4362         BT_DBG("%s", hdev->name);
4363
4364         hci_dev_lock(hdev);
4365
4366         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4367         if (!conn)
4368                 goto unlock;
4369
4370         conn->remote_cap = ev->capability;
4371         conn->remote_auth = ev->authentication;
4372
4373 unlock:
4374         hci_dev_unlock(hdev);
4375 }
4376
4377 static void hci_user_confirm_request_evt(struct hci_dev *hdev,
4378                                          struct sk_buff *skb)
4379 {
4380         struct hci_ev_user_confirm_req *ev = (void *) skb->data;
4381         int loc_mitm, rem_mitm, confirm_hint = 0;
4382         struct hci_conn *conn;
4383
4384         BT_DBG("%s", hdev->name);
4385
4386         hci_dev_lock(hdev);
4387
4388         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4389                 goto unlock;
4390
4391         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4392         if (!conn)
4393                 goto unlock;
4394
4395         loc_mitm = (conn->auth_type & 0x01);
4396         rem_mitm = (conn->remote_auth & 0x01);
4397
4398         /* If we require MITM but the remote device can't provide that
4399          * (it has NoInputNoOutput) then reject the confirmation
4400          * request. We check the security level here since it doesn't
4401          * necessarily match conn->auth_type.
4402          */
4403         if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
4404             conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
4405                 BT_DBG("Rejecting request: remote device can't provide MITM");
4406                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
4407                              sizeof(ev->bdaddr), &ev->bdaddr);
4408                 goto unlock;
4409         }
4410
4411         /* If no side requires MITM protection; auto-accept */
4412         if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
4413             (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
4414
4415                 /* If we're not the initiators request authorization to
4416                  * proceed from user space (mgmt_user_confirm with
4417                  * confirm_hint set to 1). The exception is if neither
4418                  * side had MITM or if the local IO capability is
4419                  * NoInputNoOutput, in which case we do auto-accept
4420                  */
4421                 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
4422                     conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
4423                     (loc_mitm || rem_mitm)) {
4424                         BT_DBG("Confirming auto-accept as acceptor");
4425                         confirm_hint = 1;
4426                         goto confirm;
4427                 }
4428
4429                 BT_DBG("Auto-accept of user confirmation with %ums delay",
4430                        hdev->auto_accept_delay);
4431
4432                 if (hdev->auto_accept_delay > 0) {
4433                         int delay = msecs_to_jiffies(hdev->auto_accept_delay);
4434                         queue_delayed_work(conn->hdev->workqueue,
4435                                            &conn->auto_accept_work, delay);
4436                         goto unlock;
4437                 }
4438
4439                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
4440                              sizeof(ev->bdaddr), &ev->bdaddr);
4441                 goto unlock;
4442         }
4443
4444 confirm:
4445         mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
4446                                   le32_to_cpu(ev->passkey), confirm_hint);
4447
4448 unlock:
4449         hci_dev_unlock(hdev);
4450 }
4451
4452 static void hci_user_passkey_request_evt(struct hci_dev *hdev,
4453                                          struct sk_buff *skb)
4454 {
4455         struct hci_ev_user_passkey_req *ev = (void *) skb->data;
4456
4457         BT_DBG("%s", hdev->name);
4458
4459         if (hci_dev_test_flag(hdev, HCI_MGMT))
4460                 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
4461 }
4462
4463 static void hci_user_passkey_notify_evt(struct hci_dev *hdev,
4464                                         struct sk_buff *skb)
4465 {
4466         struct hci_ev_user_passkey_notify *ev = (void *) skb->data;
4467         struct hci_conn *conn;
4468
4469         BT_DBG("%s", hdev->name);
4470
4471         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4472         if (!conn)
4473                 return;
4474
4475         conn->passkey_notify = __le32_to_cpu(ev->passkey);
4476         conn->passkey_entered = 0;
4477
4478         if (hci_dev_test_flag(hdev, HCI_MGMT))
4479                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
4480                                          conn->dst_type, conn->passkey_notify,
4481                                          conn->passkey_entered);
4482 }
4483
4484 static void hci_keypress_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
4485 {
4486         struct hci_ev_keypress_notify *ev = (void *) skb->data;
4487         struct hci_conn *conn;
4488
4489         BT_DBG("%s", hdev->name);
4490
4491         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4492         if (!conn)
4493                 return;
4494
4495         switch (ev->type) {
4496         case HCI_KEYPRESS_STARTED:
4497                 conn->passkey_entered = 0;
4498                 return;
4499
4500         case HCI_KEYPRESS_ENTERED:
4501                 conn->passkey_entered++;
4502                 break;
4503
4504         case HCI_KEYPRESS_ERASED:
4505                 conn->passkey_entered--;
4506                 break;
4507
4508         case HCI_KEYPRESS_CLEARED:
4509                 conn->passkey_entered = 0;
4510                 break;
4511
4512         case HCI_KEYPRESS_COMPLETED:
4513                 return;
4514         }
4515
4516         if (hci_dev_test_flag(hdev, HCI_MGMT))
4517                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
4518                                          conn->dst_type, conn->passkey_notify,
4519                                          conn->passkey_entered);
4520 }
4521
4522 static void hci_simple_pair_complete_evt(struct hci_dev *hdev,
4523                                          struct sk_buff *skb)
4524 {
4525         struct hci_ev_simple_pair_complete *ev = (void *) skb->data;
4526         struct hci_conn *conn;
4527
4528         BT_DBG("%s", hdev->name);
4529
4530         hci_dev_lock(hdev);
4531
4532         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4533         if (!conn)
4534                 goto unlock;
4535
4536         /* Reset the authentication requirement to unknown */
4537         conn->remote_auth = 0xff;
4538
4539         /* To avoid duplicate auth_failed events to user space we check
4540          * the HCI_CONN_AUTH_PEND flag which will be set if we
4541          * initiated the authentication. A traditional auth_complete
4542          * event gets always produced as initiator and is also mapped to
4543          * the mgmt_auth_failed event */
4544         if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
4545                 mgmt_auth_failed(conn, ev->status);
4546
4547         hci_conn_drop(conn);
4548
4549 unlock:
4550         hci_dev_unlock(hdev);
4551 }
4552
4553 static void hci_remote_host_features_evt(struct hci_dev *hdev,
4554                                          struct sk_buff *skb)
4555 {
4556         struct hci_ev_remote_host_features *ev = (void *) skb->data;
4557         struct inquiry_entry *ie;
4558         struct hci_conn *conn;
4559
4560         BT_DBG("%s", hdev->name);
4561
4562         hci_dev_lock(hdev);
4563
4564         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4565         if (conn)
4566                 memcpy(conn->features[1], ev->features, 8);
4567
4568         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4569         if (ie)
4570                 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4571
4572         hci_dev_unlock(hdev);
4573 }
4574
4575 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev,
4576                                             struct sk_buff *skb)
4577 {
4578         struct hci_ev_remote_oob_data_request *ev = (void *) skb->data;
4579         struct oob_data *data;
4580
4581         BT_DBG("%s", hdev->name);
4582
4583         hci_dev_lock(hdev);
4584
4585         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4586                 goto unlock;
4587
4588         data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
4589         if (!data) {
4590                 struct hci_cp_remote_oob_data_neg_reply cp;
4591
4592                 bacpy(&cp.bdaddr, &ev->bdaddr);
4593                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
4594                              sizeof(cp), &cp);
4595                 goto unlock;
4596         }
4597
4598         if (bredr_sc_enabled(hdev)) {
4599                 struct hci_cp_remote_oob_ext_data_reply cp;
4600
4601                 bacpy(&cp.bdaddr, &ev->bdaddr);
4602                 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
4603                         memset(cp.hash192, 0, sizeof(cp.hash192));
4604                         memset(cp.rand192, 0, sizeof(cp.rand192));
4605                 } else {
4606                         memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
4607                         memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
4608                 }
4609                 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
4610                 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
4611
4612                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
4613                              sizeof(cp), &cp);
4614         } else {
4615                 struct hci_cp_remote_oob_data_reply cp;
4616
4617                 bacpy(&cp.bdaddr, &ev->bdaddr);
4618                 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
4619                 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
4620
4621                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
4622                              sizeof(cp), &cp);
4623         }
4624
4625 unlock:
4626         hci_dev_unlock(hdev);
4627 }
4628
4629 #if IS_ENABLED(CONFIG_BT_HS)
4630 static void hci_chan_selected_evt(struct hci_dev *hdev, struct sk_buff *skb)
4631 {
4632         struct hci_ev_channel_selected *ev = (void *)skb->data;
4633         struct hci_conn *hcon;
4634
4635         BT_DBG("%s handle 0x%2.2x", hdev->name, ev->phy_handle);
4636
4637         skb_pull(skb, sizeof(*ev));
4638
4639         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
4640         if (!hcon)
4641                 return;
4642
4643         amp_read_loc_assoc_final_data(hdev, hcon);
4644 }
4645
4646 static void hci_phy_link_complete_evt(struct hci_dev *hdev,
4647                                       struct sk_buff *skb)
4648 {
4649         struct hci_ev_phy_link_complete *ev = (void *) skb->data;
4650         struct hci_conn *hcon, *bredr_hcon;
4651
4652         BT_DBG("%s handle 0x%2.2x status 0x%2.2x", hdev->name, ev->phy_handle,
4653                ev->status);
4654
4655         hci_dev_lock(hdev);
4656
4657         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
4658         if (!hcon) {
4659                 hci_dev_unlock(hdev);
4660                 return;
4661         }
4662
4663         if (ev->status) {
4664                 hci_conn_del(hcon);
4665                 hci_dev_unlock(hdev);
4666                 return;
4667         }
4668
4669         bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
4670
4671         hcon->state = BT_CONNECTED;
4672         bacpy(&hcon->dst, &bredr_hcon->dst);
4673
4674         hci_conn_hold(hcon);
4675         hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
4676         hci_conn_drop(hcon);
4677
4678         hci_debugfs_create_conn(hcon);
4679         hci_conn_add_sysfs(hcon);
4680
4681         amp_physical_cfm(bredr_hcon, hcon);
4682
4683         hci_dev_unlock(hdev);
4684 }
4685
4686 static void hci_loglink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
4687 {
4688         struct hci_ev_logical_link_complete *ev = (void *) skb->data;
4689         struct hci_conn *hcon;
4690         struct hci_chan *hchan;
4691         struct amp_mgr *mgr;
4692
4693         BT_DBG("%s log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
4694                hdev->name, le16_to_cpu(ev->handle), ev->phy_handle,
4695                ev->status);
4696
4697         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
4698         if (!hcon)
4699                 return;
4700
4701         /* Create AMP hchan */
4702         hchan = hci_chan_create(hcon);
4703         if (!hchan)
4704                 return;
4705
4706         hchan->handle = le16_to_cpu(ev->handle);
4707
4708         BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
4709
4710         mgr = hcon->amp_mgr;
4711         if (mgr && mgr->bredr_chan) {
4712                 struct l2cap_chan *bredr_chan = mgr->bredr_chan;
4713
4714                 l2cap_chan_lock(bredr_chan);
4715
4716                 bredr_chan->conn->mtu = hdev->block_mtu;
4717                 l2cap_logical_cfm(bredr_chan, hchan, 0);
4718                 hci_conn_hold(hcon);
4719
4720                 l2cap_chan_unlock(bredr_chan);
4721         }
4722 }
4723
4724 static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev,
4725                                              struct sk_buff *skb)
4726 {
4727         struct hci_ev_disconn_logical_link_complete *ev = (void *) skb->data;
4728         struct hci_chan *hchan;
4729
4730         BT_DBG("%s log handle 0x%4.4x status 0x%2.2x", hdev->name,
4731                le16_to_cpu(ev->handle), ev->status);
4732
4733         if (ev->status)
4734                 return;
4735
4736         hci_dev_lock(hdev);
4737
4738         hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
4739         if (!hchan)
4740                 goto unlock;
4741
4742         amp_destroy_logical_link(hchan, ev->reason);
4743
4744 unlock:
4745         hci_dev_unlock(hdev);
4746 }
4747
4748 static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev,
4749                                              struct sk_buff *skb)
4750 {
4751         struct hci_ev_disconn_phy_link_complete *ev = (void *) skb->data;
4752         struct hci_conn *hcon;
4753
4754         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
4755
4756         if (ev->status)
4757                 return;
4758
4759         hci_dev_lock(hdev);
4760
4761         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
4762         if (hcon) {
4763                 hcon->state = BT_CLOSED;
4764                 hci_conn_del(hcon);
4765         }
4766
4767         hci_dev_unlock(hdev);
4768 }
4769 #endif
4770
4771 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
4772                         bdaddr_t *bdaddr, u8 bdaddr_type, u8 role, u16 handle,
4773                         u16 interval, u16 latency, u16 supervision_timeout)
4774 {
4775         struct hci_conn_params *params;
4776         struct hci_conn *conn;
4777         struct smp_irk *irk;
4778         u8 addr_type;
4779
4780         hci_dev_lock(hdev);
4781
4782         /* All controllers implicitly stop advertising in the event of a
4783          * connection, so ensure that the state bit is cleared.
4784          */
4785         hci_dev_clear_flag(hdev, HCI_LE_ADV);
4786
4787         conn = hci_lookup_le_connect(hdev);
4788         if (!conn) {
4789                 conn = hci_conn_add(hdev, LE_LINK, bdaddr, role);
4790                 if (!conn) {
4791                         bt_dev_err(hdev, "no memory for new connection");
4792                         goto unlock;
4793                 }
4794
4795                 conn->dst_type = bdaddr_type;
4796
4797                 /* If we didn't have a hci_conn object previously
4798                  * but we're in master role this must be something
4799                  * initiated using a white list. Since white list based
4800                  * connections are not "first class citizens" we don't
4801                  * have full tracking of them. Therefore, we go ahead
4802                  * with a "best effort" approach of determining the
4803                  * initiator address based on the HCI_PRIVACY flag.
4804                  */
4805                 if (conn->out) {
4806                         conn->resp_addr_type = bdaddr_type;
4807                         bacpy(&conn->resp_addr, bdaddr);
4808                         if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
4809                                 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
4810                                 bacpy(&conn->init_addr, &hdev->rpa);
4811                         } else {
4812                                 hci_copy_identity_address(hdev,
4813                                                           &conn->init_addr,
4814                                                           &conn->init_addr_type);
4815                         }
4816                 }
4817         } else {
4818                 cancel_delayed_work(&conn->le_conn_timeout);
4819         }
4820
4821         if (!conn->out) {
4822                 /* Set the responder (our side) address type based on
4823                  * the advertising address type.
4824                  */
4825                 conn->resp_addr_type = hdev->adv_addr_type;
4826                 if (hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
4827                         /* In case of ext adv, resp_addr will be updated in
4828                          * Adv Terminated event.
4829                          */
4830                         if (!ext_adv_capable(hdev))
4831                                 bacpy(&conn->resp_addr, &hdev->random_addr);
4832                 } else {
4833                         bacpy(&conn->resp_addr, &hdev->bdaddr);
4834                 }
4835
4836                 conn->init_addr_type = bdaddr_type;
4837                 bacpy(&conn->init_addr, bdaddr);
4838
4839                 /* For incoming connections, set the default minimum
4840                  * and maximum connection interval. They will be used
4841                  * to check if the parameters are in range and if not
4842                  * trigger the connection update procedure.
4843                  */
4844                 conn->le_conn_min_interval = hdev->le_conn_min_interval;
4845                 conn->le_conn_max_interval = hdev->le_conn_max_interval;
4846         }
4847
4848         /* Lookup the identity address from the stored connection
4849          * address and address type.
4850          *
4851          * When establishing connections to an identity address, the
4852          * connection procedure will store the resolvable random
4853          * address first. Now if it can be converted back into the
4854          * identity address, start using the identity address from
4855          * now on.
4856          */
4857         irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
4858         if (irk) {
4859                 bacpy(&conn->dst, &irk->bdaddr);
4860                 conn->dst_type = irk->addr_type;
4861         }
4862
4863         if (status) {
4864                 hci_le_conn_failed(conn, status);
4865                 goto unlock;
4866         }
4867
4868         if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
4869                 addr_type = BDADDR_LE_PUBLIC;
4870         else
4871                 addr_type = BDADDR_LE_RANDOM;
4872
4873         /* Drop the connection if the device is blocked */
4874         if (hci_bdaddr_list_lookup(&hdev->blacklist, &conn->dst, addr_type)) {
4875                 hci_conn_drop(conn);
4876                 goto unlock;
4877         }
4878
4879         if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
4880                 mgmt_device_connected(hdev, conn, 0, NULL, 0);
4881
4882         conn->sec_level = BT_SECURITY_LOW;
4883         conn->handle = handle;
4884         conn->state = BT_CONFIG;
4885
4886         conn->le_conn_interval = interval;
4887         conn->le_conn_latency = latency;
4888         conn->le_supv_timeout = supervision_timeout;
4889
4890         hci_debugfs_create_conn(conn);
4891         hci_conn_add_sysfs(conn);
4892
4893         if (!status) {
4894                 /* The remote features procedure is defined for master
4895                  * role only. So only in case of an initiated connection
4896                  * request the remote features.
4897                  *
4898                  * If the local controller supports slave-initiated features
4899                  * exchange, then requesting the remote features in slave
4900                  * role is possible. Otherwise just transition into the
4901                  * connected state without requesting the remote features.
4902                  */
4903                 if (conn->out ||
4904                     (hdev->le_features[0] & HCI_LE_SLAVE_FEATURES)) {
4905                         struct hci_cp_le_read_remote_features cp;
4906
4907                         cp.handle = __cpu_to_le16(conn->handle);
4908
4909                         hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
4910                                      sizeof(cp), &cp);
4911
4912                         hci_conn_hold(conn);
4913                 } else {
4914                         conn->state = BT_CONNECTED;
4915                         hci_connect_cfm(conn, status);
4916                 }
4917         } else {
4918                 hci_connect_cfm(conn, status);
4919         }
4920
4921         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
4922                                            conn->dst_type);
4923         if (params) {
4924                 list_del_init(&params->action);
4925                 if (params->conn) {
4926                         hci_conn_drop(params->conn);
4927                         hci_conn_put(params->conn);
4928                         params->conn = NULL;
4929                 }
4930         }
4931
4932 unlock:
4933         hci_update_background_scan(hdev);
4934         hci_dev_unlock(hdev);
4935 }
4936
4937 static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
4938 {
4939         struct hci_ev_le_conn_complete *ev = (void *) skb->data;
4940
4941         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
4942
4943         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
4944                              ev->role, le16_to_cpu(ev->handle),
4945                              le16_to_cpu(ev->interval),
4946                              le16_to_cpu(ev->latency),
4947                              le16_to_cpu(ev->supervision_timeout));
4948 }
4949
4950 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev,
4951                                          struct sk_buff *skb)
4952 {
4953         struct hci_ev_le_enh_conn_complete *ev = (void *) skb->data;
4954
4955         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
4956
4957         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
4958                              ev->role, le16_to_cpu(ev->handle),
4959                              le16_to_cpu(ev->interval),
4960                              le16_to_cpu(ev->latency),
4961                              le16_to_cpu(ev->supervision_timeout));
4962 }
4963
4964 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, struct sk_buff *skb)
4965 {
4966         struct hci_evt_le_ext_adv_set_term *ev = (void *) skb->data;
4967         struct hci_conn *conn;
4968
4969         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
4970
4971         if (ev->status)
4972                 return;
4973
4974         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
4975         if (conn) {
4976                 struct adv_info *adv_instance;
4977
4978                 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM)
4979                         return;
4980
4981                 if (!hdev->cur_adv_instance) {
4982                         bacpy(&conn->resp_addr, &hdev->random_addr);
4983                         return;
4984                 }
4985
4986                 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
4987                 if (adv_instance)
4988                         bacpy(&conn->resp_addr, &adv_instance->random_addr);
4989         }
4990 }
4991
4992 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev,
4993                                             struct sk_buff *skb)
4994 {
4995         struct hci_ev_le_conn_update_complete *ev = (void *) skb->data;
4996         struct hci_conn *conn;
4997
4998         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
4999
5000         if (ev->status)
5001                 return;
5002
5003         hci_dev_lock(hdev);
5004
5005         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5006         if (conn) {
5007                 conn->le_conn_interval = le16_to_cpu(ev->interval);
5008                 conn->le_conn_latency = le16_to_cpu(ev->latency);
5009                 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5010         }
5011
5012         hci_dev_unlock(hdev);
5013 }
5014
5015 /* This function requires the caller holds hdev->lock */
5016 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5017                                               bdaddr_t *addr,
5018                                               u8 addr_type, u8 adv_type,
5019                                               bdaddr_t *direct_rpa)
5020 {
5021         struct hci_conn *conn;
5022         struct hci_conn_params *params;
5023
5024         /* If the event is not connectable don't proceed further */
5025         if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5026                 return NULL;
5027
5028         /* Ignore if the device is blocked */
5029         if (hci_bdaddr_list_lookup(&hdev->blacklist, addr, addr_type))
5030                 return NULL;
5031
5032         /* Most controller will fail if we try to create new connections
5033          * while we have an existing one in slave role.
5034          */
5035         if (hdev->conn_hash.le_num_slave > 0)
5036                 return NULL;
5037
5038         /* If we're not connectable only connect devices that we have in
5039          * our pend_le_conns list.
5040          */
5041         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5042                                            addr_type);
5043         if (!params)
5044                 return NULL;
5045
5046         if (!params->explicit_connect) {
5047                 switch (params->auto_connect) {
5048                 case HCI_AUTO_CONN_DIRECT:
5049                         /* Only devices advertising with ADV_DIRECT_IND are
5050                          * triggering a connection attempt. This is allowing
5051                          * incoming connections from slave devices.
5052                          */
5053                         if (adv_type != LE_ADV_DIRECT_IND)
5054                                 return NULL;
5055                         break;
5056                 case HCI_AUTO_CONN_ALWAYS:
5057                         /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5058                          * are triggering a connection attempt. This means
5059                          * that incoming connectioms from slave device are
5060                          * accepted and also outgoing connections to slave
5061                          * devices are established when found.
5062                          */
5063                         break;
5064                 default:
5065                         return NULL;
5066                 }
5067         }
5068
5069         conn = hci_connect_le(hdev, addr, addr_type, BT_SECURITY_LOW,
5070                               HCI_LE_AUTOCONN_TIMEOUT, HCI_ROLE_MASTER,
5071                               direct_rpa);
5072         if (!IS_ERR(conn)) {
5073                 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5074                  * by higher layer that tried to connect, if no then
5075                  * store the pointer since we don't really have any
5076                  * other owner of the object besides the params that
5077                  * triggered it. This way we can abort the connection if
5078                  * the parameters get removed and keep the reference
5079                  * count consistent once the connection is established.
5080                  */
5081
5082                 if (!params->explicit_connect)
5083                         params->conn = hci_conn_get(conn);
5084
5085                 return conn;
5086         }
5087
5088         switch (PTR_ERR(conn)) {
5089         case -EBUSY:
5090                 /* If hci_connect() returns -EBUSY it means there is already
5091                  * an LE connection attempt going on. Since controllers don't
5092                  * support more than one connection attempt at the time, we
5093                  * don't consider this an error case.
5094                  */
5095                 break;
5096         default:
5097                 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5098                 return NULL;
5099         }
5100
5101         return NULL;
5102 }
5103
5104 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
5105                                u8 bdaddr_type, bdaddr_t *direct_addr,
5106                                u8 direct_addr_type, s8 rssi, u8 *data, u8 len)
5107 {
5108         struct discovery_state *d = &hdev->discovery;
5109         struct smp_irk *irk;
5110         struct hci_conn *conn;
5111         bool match;
5112         u32 flags;
5113         u8 *ptr, real_len;
5114
5115         switch (type) {
5116         case LE_ADV_IND:
5117         case LE_ADV_DIRECT_IND:
5118         case LE_ADV_SCAN_IND:
5119         case LE_ADV_NONCONN_IND:
5120         case LE_ADV_SCAN_RSP:
5121                 break;
5122         default:
5123                 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
5124                                        "type: 0x%02x", type);
5125                 return;
5126         }
5127
5128         /* Find the end of the data in case the report contains padded zero
5129          * bytes at the end causing an invalid length value.
5130          *
5131          * When data is NULL, len is 0 so there is no need for extra ptr
5132          * check as 'ptr < data + 0' is already false in such case.
5133          */
5134         for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
5135                 if (ptr + 1 + *ptr > data + len)
5136                         break;
5137         }
5138
5139         real_len = ptr - data;
5140
5141         /* Adjust for actual length */
5142         if (len != real_len) {
5143                 bt_dev_err_ratelimited(hdev, "advertising data len corrected");
5144                 len = real_len;
5145         }
5146
5147         /* If the direct address is present, then this report is from
5148          * a LE Direct Advertising Report event. In that case it is
5149          * important to see if the address is matching the local
5150          * controller address.
5151          */
5152         if (direct_addr) {
5153                 /* Only resolvable random addresses are valid for these
5154                  * kind of reports and others can be ignored.
5155                  */
5156                 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
5157                         return;
5158
5159                 /* If the controller is not using resolvable random
5160                  * addresses, then this report can be ignored.
5161                  */
5162                 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
5163                         return;
5164
5165                 /* If the local IRK of the controller does not match
5166                  * with the resolvable random address provided, then
5167                  * this report can be ignored.
5168                  */
5169                 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
5170                         return;
5171         }
5172
5173         /* Check if we need to convert to identity address */
5174         irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
5175         if (irk) {
5176                 bdaddr = &irk->bdaddr;
5177                 bdaddr_type = irk->addr_type;
5178         }
5179
5180         /* Check if we have been requested to connect to this device.
5181          *
5182          * direct_addr is set only for directed advertising reports (it is NULL
5183          * for advertising reports) and is already verified to be RPA above.
5184          */
5185         conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, type,
5186                                                                 direct_addr);
5187         if (conn && type == LE_ADV_IND) {
5188                 /* Store report for later inclusion by
5189                  * mgmt_device_connected
5190                  */
5191                 memcpy(conn->le_adv_data, data, len);
5192                 conn->le_adv_data_len = len;
5193         }
5194
5195         /* Passive scanning shouldn't trigger any device found events,
5196          * except for devices marked as CONN_REPORT for which we do send
5197          * device found events.
5198          */
5199         if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
5200                 if (type == LE_ADV_DIRECT_IND)
5201                         return;
5202
5203                 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
5204                                                bdaddr, bdaddr_type))
5205                         return;
5206
5207                 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
5208                         flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
5209                 else
5210                         flags = 0;
5211                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
5212                                   rssi, flags, data, len, NULL, 0);
5213                 return;
5214         }
5215
5216         /* When receiving non-connectable or scannable undirected
5217          * advertising reports, this means that the remote device is
5218          * not connectable and then clearly indicate this in the
5219          * device found event.
5220          *
5221          * When receiving a scan response, then there is no way to
5222          * know if the remote device is connectable or not. However
5223          * since scan responses are merged with a previously seen
5224          * advertising report, the flags field from that report
5225          * will be used.
5226          *
5227          * In the really unlikely case that a controller get confused
5228          * and just sends a scan response event, then it is marked as
5229          * not connectable as well.
5230          */
5231         if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND ||
5232             type == LE_ADV_SCAN_RSP)
5233                 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
5234         else
5235                 flags = 0;
5236
5237         /* If there's nothing pending either store the data from this
5238          * event or send an immediate device found event if the data
5239          * should not be stored for later.
5240          */
5241         if (!has_pending_adv_report(hdev)) {
5242                 /* If the report will trigger a SCAN_REQ store it for
5243                  * later merging.
5244                  */
5245                 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
5246                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
5247                                                  rssi, flags, data, len);
5248                         return;
5249                 }
5250
5251                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
5252                                   rssi, flags, data, len, NULL, 0);
5253                 return;
5254         }
5255
5256         /* Check if the pending report is for the same device as the new one */
5257         match = (!bacmp(bdaddr, &d->last_adv_addr) &&
5258                  bdaddr_type == d->last_adv_addr_type);
5259
5260         /* If the pending data doesn't match this report or this isn't a
5261          * scan response (e.g. we got a duplicate ADV_IND) then force
5262          * sending of the pending data.
5263          */
5264         if (type != LE_ADV_SCAN_RSP || !match) {
5265                 /* Send out whatever is in the cache, but skip duplicates */
5266                 if (!match)
5267                         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
5268                                           d->last_adv_addr_type, NULL,
5269                                           d->last_adv_rssi, d->last_adv_flags,
5270                                           d->last_adv_data,
5271                                           d->last_adv_data_len, NULL, 0);
5272
5273                 /* If the new report will trigger a SCAN_REQ store it for
5274                  * later merging.
5275                  */
5276                 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
5277                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
5278                                                  rssi, flags, data, len);
5279                         return;
5280                 }
5281
5282                 /* The advertising reports cannot be merged, so clear
5283                  * the pending report and send out a device found event.
5284                  */
5285                 clear_pending_adv_report(hdev);
5286                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
5287                                   rssi, flags, data, len, NULL, 0);
5288                 return;
5289         }
5290
5291         /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
5292          * the new event is a SCAN_RSP. We can therefore proceed with
5293          * sending a merged device found event.
5294          */
5295         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
5296                           d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
5297                           d->last_adv_data, d->last_adv_data_len, data, len);
5298         clear_pending_adv_report(hdev);
5299 }
5300
5301 static void hci_le_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
5302 {
5303         u8 num_reports = skb->data[0];
5304         void *ptr = &skb->data[1];
5305
5306         hci_dev_lock(hdev);
5307
5308         while (num_reports--) {
5309                 struct hci_ev_le_advertising_info *ev = ptr;
5310                 s8 rssi;
5311
5312                 if (ev->length <= HCI_MAX_AD_LENGTH) {
5313                         rssi = ev->data[ev->length];
5314                         process_adv_report(hdev, ev->evt_type, &ev->bdaddr,
5315                                            ev->bdaddr_type, NULL, 0, rssi,
5316                                            ev->data, ev->length);
5317                 } else {
5318                         bt_dev_err(hdev, "Dropping invalid advertising data");
5319                 }
5320
5321                 ptr += sizeof(*ev) + ev->length + 1;
5322         }
5323
5324         hci_dev_unlock(hdev);
5325 }
5326
5327 static u8 ext_evt_type_to_legacy(u16 evt_type)
5328 {
5329         if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
5330                 switch (evt_type) {
5331                 case LE_LEGACY_ADV_IND:
5332                         return LE_ADV_IND;
5333                 case LE_LEGACY_ADV_DIRECT_IND:
5334                         return LE_ADV_DIRECT_IND;
5335                 case LE_LEGACY_ADV_SCAN_IND:
5336                         return LE_ADV_SCAN_IND;
5337                 case LE_LEGACY_NONCONN_IND:
5338                         return LE_ADV_NONCONN_IND;
5339                 case LE_LEGACY_SCAN_RSP_ADV:
5340                 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
5341                         return LE_ADV_SCAN_RSP;
5342                 }
5343
5344                 BT_ERR_RATELIMITED("Unknown advertising packet type: 0x%02x",
5345                                    evt_type);
5346
5347                 return LE_ADV_INVALID;
5348         }
5349
5350         if (evt_type & LE_EXT_ADV_CONN_IND) {
5351                 if (evt_type & LE_EXT_ADV_DIRECT_IND)
5352                         return LE_ADV_DIRECT_IND;
5353
5354                 return LE_ADV_IND;
5355         }
5356
5357         if (evt_type & LE_EXT_ADV_SCAN_RSP)
5358                 return LE_ADV_SCAN_RSP;
5359
5360         if (evt_type & LE_EXT_ADV_SCAN_IND)
5361                 return LE_ADV_SCAN_IND;
5362
5363         if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
5364             evt_type & LE_EXT_ADV_DIRECT_IND)
5365                 return LE_ADV_NONCONN_IND;
5366
5367         BT_ERR_RATELIMITED("Unknown advertising packet type: 0x%02x",
5368                                    evt_type);
5369
5370         return LE_ADV_INVALID;
5371 }
5372
5373 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
5374 {
5375         u8 num_reports = skb->data[0];
5376         void *ptr = &skb->data[1];
5377
5378         hci_dev_lock(hdev);
5379
5380         while (num_reports--) {
5381                 struct hci_ev_le_ext_adv_report *ev = ptr;
5382                 u8 legacy_evt_type;
5383                 u16 evt_type;
5384
5385                 evt_type = __le16_to_cpu(ev->evt_type);
5386                 legacy_evt_type = ext_evt_type_to_legacy(evt_type);
5387                 if (legacy_evt_type != LE_ADV_INVALID) {
5388                         process_adv_report(hdev, legacy_evt_type, &ev->bdaddr,
5389                                            ev->bdaddr_type, NULL, 0, ev->rssi,
5390                                            ev->data, ev->length);
5391                 }
5392
5393                 ptr += sizeof(*ev) + ev->length + 1;
5394         }
5395
5396         hci_dev_unlock(hdev);
5397 }
5398
5399 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev,
5400                                             struct sk_buff *skb)
5401 {
5402         struct hci_ev_le_remote_feat_complete *ev = (void *)skb->data;
5403         struct hci_conn *conn;
5404
5405         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
5406
5407         hci_dev_lock(hdev);
5408
5409         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5410         if (conn) {
5411                 if (!ev->status)
5412                         memcpy(conn->features[0], ev->features, 8);
5413
5414                 if (conn->state == BT_CONFIG) {
5415                         __u8 status;
5416
5417                         /* If the local controller supports slave-initiated
5418                          * features exchange, but the remote controller does
5419                          * not, then it is possible that the error code 0x1a
5420                          * for unsupported remote feature gets returned.
5421                          *
5422                          * In this specific case, allow the connection to
5423                          * transition into connected state and mark it as
5424                          * successful.
5425                          */
5426                         if ((hdev->le_features[0] & HCI_LE_SLAVE_FEATURES) &&
5427                             !conn->out && ev->status == 0x1a)
5428                                 status = 0x00;
5429                         else
5430                                 status = ev->status;
5431
5432                         conn->state = BT_CONNECTED;
5433                         hci_connect_cfm(conn, status);
5434                         hci_conn_drop(conn);
5435                 }
5436         }
5437
5438         hci_dev_unlock(hdev);
5439 }
5440
5441 static void hci_le_ltk_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
5442 {
5443         struct hci_ev_le_ltk_req *ev = (void *) skb->data;
5444         struct hci_cp_le_ltk_reply cp;
5445         struct hci_cp_le_ltk_neg_reply neg;
5446         struct hci_conn *conn;
5447         struct smp_ltk *ltk;
5448
5449         BT_DBG("%s handle 0x%4.4x", hdev->name, __le16_to_cpu(ev->handle));
5450
5451         hci_dev_lock(hdev);
5452
5453         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5454         if (conn == NULL)
5455                 goto not_found;
5456
5457         ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
5458         if (!ltk)
5459                 goto not_found;
5460
5461         if (smp_ltk_is_sc(ltk)) {
5462                 /* With SC both EDiv and Rand are set to zero */
5463                 if (ev->ediv || ev->rand)
5464                         goto not_found;
5465         } else {
5466                 /* For non-SC keys check that EDiv and Rand match */
5467                 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
5468                         goto not_found;
5469         }
5470
5471         memcpy(cp.ltk, ltk->val, ltk->enc_size);
5472         memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
5473         cp.handle = cpu_to_le16(conn->handle);
5474
5475         conn->pending_sec_level = smp_ltk_sec_level(ltk);
5476
5477         conn->enc_key_size = ltk->enc_size;
5478
5479         hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
5480
5481         /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
5482          * temporary key used to encrypt a connection following
5483          * pairing. It is used during the Encrypted Session Setup to
5484          * distribute the keys. Later, security can be re-established
5485          * using a distributed LTK.
5486          */
5487         if (ltk->type == SMP_STK) {
5488                 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
5489                 list_del_rcu(&ltk->list);
5490                 kfree_rcu(ltk, rcu);
5491         } else {
5492                 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
5493         }
5494
5495         hci_dev_unlock(hdev);
5496
5497         return;
5498
5499 not_found:
5500         neg.handle = ev->handle;
5501         hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
5502         hci_dev_unlock(hdev);
5503 }
5504
5505 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
5506                                       u8 reason)
5507 {
5508         struct hci_cp_le_conn_param_req_neg_reply cp;
5509
5510         cp.handle = cpu_to_le16(handle);
5511         cp.reason = reason;
5512
5513         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
5514                      &cp);
5515 }
5516
5517 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev,
5518                                              struct sk_buff *skb)
5519 {
5520         struct hci_ev_le_remote_conn_param_req *ev = (void *) skb->data;
5521         struct hci_cp_le_conn_param_req_reply cp;
5522         struct hci_conn *hcon;
5523         u16 handle, min, max, latency, timeout;
5524
5525         handle = le16_to_cpu(ev->handle);
5526         min = le16_to_cpu(ev->interval_min);
5527         max = le16_to_cpu(ev->interval_max);
5528         latency = le16_to_cpu(ev->latency);
5529         timeout = le16_to_cpu(ev->timeout);
5530
5531         hcon = hci_conn_hash_lookup_handle(hdev, handle);
5532         if (!hcon || hcon->state != BT_CONNECTED)
5533                 return send_conn_param_neg_reply(hdev, handle,
5534                                                  HCI_ERROR_UNKNOWN_CONN_ID);
5535
5536         if (hci_check_conn_params(min, max, latency, timeout))
5537                 return send_conn_param_neg_reply(hdev, handle,
5538                                                  HCI_ERROR_INVALID_LL_PARAMS);
5539
5540         if (hcon->role == HCI_ROLE_MASTER) {
5541                 struct hci_conn_params *params;
5542                 u8 store_hint;
5543
5544                 hci_dev_lock(hdev);
5545
5546                 params = hci_conn_params_lookup(hdev, &hcon->dst,
5547                                                 hcon->dst_type);
5548                 if (params) {
5549                         params->conn_min_interval = min;
5550                         params->conn_max_interval = max;
5551                         params->conn_latency = latency;
5552                         params->supervision_timeout = timeout;
5553                         store_hint = 0x01;
5554                 } else{
5555                         store_hint = 0x00;
5556                 }
5557
5558                 hci_dev_unlock(hdev);
5559
5560                 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
5561                                     store_hint, min, max, latency, timeout);
5562         }
5563
5564         cp.handle = ev->handle;
5565         cp.interval_min = ev->interval_min;
5566         cp.interval_max = ev->interval_max;
5567         cp.latency = ev->latency;
5568         cp.timeout = ev->timeout;
5569         cp.min_ce_len = 0;
5570         cp.max_ce_len = 0;
5571
5572         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
5573 }
5574
5575 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev,
5576                                          struct sk_buff *skb)
5577 {
5578         u8 num_reports = skb->data[0];
5579         void *ptr = &skb->data[1];
5580
5581         hci_dev_lock(hdev);
5582
5583         while (num_reports--) {
5584                 struct hci_ev_le_direct_adv_info *ev = ptr;
5585
5586                 process_adv_report(hdev, ev->evt_type, &ev->bdaddr,
5587                                    ev->bdaddr_type, &ev->direct_addr,
5588                                    ev->direct_addr_type, ev->rssi, NULL, 0);
5589
5590                 ptr += sizeof(*ev);
5591         }
5592
5593         hci_dev_unlock(hdev);
5594 }
5595
5596 static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
5597 {
5598         struct hci_ev_le_meta *le_ev = (void *) skb->data;
5599
5600         skb_pull(skb, sizeof(*le_ev));
5601
5602         switch (le_ev->subevent) {
5603         case HCI_EV_LE_CONN_COMPLETE:
5604                 hci_le_conn_complete_evt(hdev, skb);
5605                 break;
5606
5607         case HCI_EV_LE_CONN_UPDATE_COMPLETE:
5608                 hci_le_conn_update_complete_evt(hdev, skb);
5609                 break;
5610
5611         case HCI_EV_LE_ADVERTISING_REPORT:
5612                 hci_le_adv_report_evt(hdev, skb);
5613                 break;
5614
5615         case HCI_EV_LE_REMOTE_FEAT_COMPLETE:
5616                 hci_le_remote_feat_complete_evt(hdev, skb);
5617                 break;
5618
5619         case HCI_EV_LE_LTK_REQ:
5620                 hci_le_ltk_request_evt(hdev, skb);
5621                 break;
5622
5623         case HCI_EV_LE_REMOTE_CONN_PARAM_REQ:
5624                 hci_le_remote_conn_param_req_evt(hdev, skb);
5625                 break;
5626
5627         case HCI_EV_LE_DIRECT_ADV_REPORT:
5628                 hci_le_direct_adv_report_evt(hdev, skb);
5629                 break;
5630
5631         case HCI_EV_LE_EXT_ADV_REPORT:
5632                 hci_le_ext_adv_report_evt(hdev, skb);
5633                 break;
5634
5635         case HCI_EV_LE_ENHANCED_CONN_COMPLETE:
5636                 hci_le_enh_conn_complete_evt(hdev, skb);
5637                 break;
5638
5639         case HCI_EV_LE_EXT_ADV_SET_TERM:
5640                 hci_le_ext_adv_term_evt(hdev, skb);
5641                 break;
5642
5643         default:
5644                 break;
5645         }
5646 }
5647
5648 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
5649                                  u8 event, struct sk_buff *skb)
5650 {
5651         struct hci_ev_cmd_complete *ev;
5652         struct hci_event_hdr *hdr;
5653
5654         if (!skb)
5655                 return false;
5656
5657         if (skb->len < sizeof(*hdr)) {
5658                 bt_dev_err(hdev, "too short HCI event");
5659                 return false;
5660         }
5661
5662         hdr = (void *) skb->data;
5663         skb_pull(skb, HCI_EVENT_HDR_SIZE);
5664
5665         if (event) {
5666                 if (hdr->evt != event)
5667                         return false;
5668                 return true;
5669         }
5670
5671         if (hdr->evt != HCI_EV_CMD_COMPLETE) {
5672                 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
5673                            hdr->evt);
5674                 return false;
5675         }
5676
5677         if (skb->len < sizeof(*ev)) {
5678                 bt_dev_err(hdev, "too short cmd_complete event");
5679                 return false;
5680         }
5681
5682         ev = (void *) skb->data;
5683         skb_pull(skb, sizeof(*ev));
5684
5685         if (opcode != __le16_to_cpu(ev->opcode)) {
5686                 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
5687                        __le16_to_cpu(ev->opcode));
5688                 return false;
5689         }
5690
5691         return true;
5692 }
5693
5694 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
5695 {
5696         struct hci_event_hdr *hdr = (void *) skb->data;
5697         hci_req_complete_t req_complete = NULL;
5698         hci_req_complete_skb_t req_complete_skb = NULL;
5699         struct sk_buff *orig_skb = NULL;
5700         u8 status = 0, event = hdr->evt, req_evt = 0;
5701         u16 opcode = HCI_OP_NOP;
5702
5703         if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->hci.req_event == event) {
5704                 struct hci_command_hdr *cmd_hdr = (void *) hdev->sent_cmd->data;
5705                 opcode = __le16_to_cpu(cmd_hdr->opcode);
5706                 hci_req_cmd_complete(hdev, opcode, status, &req_complete,
5707                                      &req_complete_skb);
5708                 req_evt = event;
5709         }
5710
5711         /* If it looks like we might end up having to call
5712          * req_complete_skb, store a pristine copy of the skb since the
5713          * various handlers may modify the original one through
5714          * skb_pull() calls, etc.
5715          */
5716         if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
5717             event == HCI_EV_CMD_COMPLETE)
5718                 orig_skb = skb_clone(skb, GFP_KERNEL);
5719
5720         skb_pull(skb, HCI_EVENT_HDR_SIZE);
5721
5722         switch (event) {
5723         case HCI_EV_INQUIRY_COMPLETE:
5724                 hci_inquiry_complete_evt(hdev, skb);
5725                 break;
5726
5727         case HCI_EV_INQUIRY_RESULT:
5728                 hci_inquiry_result_evt(hdev, skb);
5729                 break;
5730
5731         case HCI_EV_CONN_COMPLETE:
5732                 hci_conn_complete_evt(hdev, skb);
5733                 break;
5734
5735         case HCI_EV_CONN_REQUEST:
5736                 hci_conn_request_evt(hdev, skb);
5737                 break;
5738
5739         case HCI_EV_DISCONN_COMPLETE:
5740                 hci_disconn_complete_evt(hdev, skb);
5741                 break;
5742
5743         case HCI_EV_AUTH_COMPLETE:
5744                 hci_auth_complete_evt(hdev, skb);
5745                 break;
5746
5747         case HCI_EV_REMOTE_NAME:
5748                 hci_remote_name_evt(hdev, skb);
5749                 break;
5750
5751         case HCI_EV_ENCRYPT_CHANGE:
5752                 hci_encrypt_change_evt(hdev, skb);
5753                 break;
5754
5755         case HCI_EV_CHANGE_LINK_KEY_COMPLETE:
5756                 hci_change_link_key_complete_evt(hdev, skb);
5757                 break;
5758
5759         case HCI_EV_REMOTE_FEATURES:
5760                 hci_remote_features_evt(hdev, skb);
5761                 break;
5762
5763         case HCI_EV_CMD_COMPLETE:
5764                 hci_cmd_complete_evt(hdev, skb, &opcode, &status,
5765                                      &req_complete, &req_complete_skb);
5766                 break;
5767
5768         case HCI_EV_CMD_STATUS:
5769                 hci_cmd_status_evt(hdev, skb, &opcode, &status, &req_complete,
5770                                    &req_complete_skb);
5771                 break;
5772
5773         case HCI_EV_HARDWARE_ERROR:
5774                 hci_hardware_error_evt(hdev, skb);
5775                 break;
5776
5777         case HCI_EV_ROLE_CHANGE:
5778                 hci_role_change_evt(hdev, skb);
5779                 break;
5780
5781         case HCI_EV_NUM_COMP_PKTS:
5782                 hci_num_comp_pkts_evt(hdev, skb);
5783                 break;
5784
5785         case HCI_EV_MODE_CHANGE:
5786                 hci_mode_change_evt(hdev, skb);
5787                 break;
5788
5789         case HCI_EV_PIN_CODE_REQ:
5790                 hci_pin_code_request_evt(hdev, skb);
5791                 break;
5792
5793         case HCI_EV_LINK_KEY_REQ:
5794                 hci_link_key_request_evt(hdev, skb);
5795                 break;
5796
5797         case HCI_EV_LINK_KEY_NOTIFY:
5798                 hci_link_key_notify_evt(hdev, skb);
5799                 break;
5800
5801         case HCI_EV_CLOCK_OFFSET:
5802                 hci_clock_offset_evt(hdev, skb);
5803                 break;
5804
5805         case HCI_EV_PKT_TYPE_CHANGE:
5806                 hci_pkt_type_change_evt(hdev, skb);
5807                 break;
5808
5809         case HCI_EV_PSCAN_REP_MODE:
5810                 hci_pscan_rep_mode_evt(hdev, skb);
5811                 break;
5812
5813         case HCI_EV_INQUIRY_RESULT_WITH_RSSI:
5814                 hci_inquiry_result_with_rssi_evt(hdev, skb);
5815                 break;
5816
5817         case HCI_EV_REMOTE_EXT_FEATURES:
5818                 hci_remote_ext_features_evt(hdev, skb);
5819                 break;
5820
5821         case HCI_EV_SYNC_CONN_COMPLETE:
5822                 hci_sync_conn_complete_evt(hdev, skb);
5823                 break;
5824
5825         case HCI_EV_EXTENDED_INQUIRY_RESULT:
5826                 hci_extended_inquiry_result_evt(hdev, skb);
5827                 break;
5828
5829         case HCI_EV_KEY_REFRESH_COMPLETE:
5830                 hci_key_refresh_complete_evt(hdev, skb);
5831                 break;
5832
5833         case HCI_EV_IO_CAPA_REQUEST:
5834                 hci_io_capa_request_evt(hdev, skb);
5835                 break;
5836
5837         case HCI_EV_IO_CAPA_REPLY:
5838                 hci_io_capa_reply_evt(hdev, skb);
5839                 break;
5840
5841         case HCI_EV_USER_CONFIRM_REQUEST:
5842                 hci_user_confirm_request_evt(hdev, skb);
5843                 break;
5844
5845         case HCI_EV_USER_PASSKEY_REQUEST:
5846                 hci_user_passkey_request_evt(hdev, skb);
5847                 break;
5848
5849         case HCI_EV_USER_PASSKEY_NOTIFY:
5850                 hci_user_passkey_notify_evt(hdev, skb);
5851                 break;
5852
5853         case HCI_EV_KEYPRESS_NOTIFY:
5854                 hci_keypress_notify_evt(hdev, skb);
5855                 break;
5856
5857         case HCI_EV_SIMPLE_PAIR_COMPLETE:
5858                 hci_simple_pair_complete_evt(hdev, skb);
5859                 break;
5860
5861         case HCI_EV_REMOTE_HOST_FEATURES:
5862                 hci_remote_host_features_evt(hdev, skb);
5863                 break;
5864
5865         case HCI_EV_LE_META:
5866                 hci_le_meta_evt(hdev, skb);
5867                 break;
5868
5869         case HCI_EV_REMOTE_OOB_DATA_REQUEST:
5870                 hci_remote_oob_data_request_evt(hdev, skb);
5871                 break;
5872
5873 #if IS_ENABLED(CONFIG_BT_HS)
5874         case HCI_EV_CHANNEL_SELECTED:
5875                 hci_chan_selected_evt(hdev, skb);
5876                 break;
5877
5878         case HCI_EV_PHY_LINK_COMPLETE:
5879                 hci_phy_link_complete_evt(hdev, skb);
5880                 break;
5881
5882         case HCI_EV_LOGICAL_LINK_COMPLETE:
5883                 hci_loglink_complete_evt(hdev, skb);
5884                 break;
5885
5886         case HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE:
5887                 hci_disconn_loglink_complete_evt(hdev, skb);
5888                 break;
5889
5890         case HCI_EV_DISCONN_PHY_LINK_COMPLETE:
5891                 hci_disconn_phylink_complete_evt(hdev, skb);
5892                 break;
5893 #endif
5894
5895         case HCI_EV_NUM_COMP_BLOCKS:
5896                 hci_num_comp_blocks_evt(hdev, skb);
5897                 break;
5898
5899         default:
5900                 BT_DBG("%s event 0x%2.2x", hdev->name, event);
5901                 break;
5902         }
5903
5904         if (req_complete) {
5905                 req_complete(hdev, status, opcode);
5906         } else if (req_complete_skb) {
5907                 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
5908                         kfree_skb(orig_skb);
5909                         orig_skb = NULL;
5910                 }
5911                 req_complete_skb(hdev, status, opcode, orig_skb);
5912         }
5913
5914         kfree_skb(orig_skb);
5915         kfree_skb(skb);
5916         hdev->stat.evt_rx++;
5917 }