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    Copyright 2023 NXP
   5
   6    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License version 2 as
  10    published by the Free Software Foundation;
  11
  12    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  13    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  15    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  16    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  17    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  19    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20
  21    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  22    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  23    SOFTWARE IS DISCLAIMED.
  24 */
  25
  26 /* Bluetooth HCI event handling. */
  27
  28 #include <asm/unaligned.h>
  29 #include <linux/crypto.h>
  30 #include <crypto/algapi.h>
  31
  32 #include <net/bluetooth/bluetooth.h>
  33 #include <net/bluetooth/hci_core.h>
  34 #include <net/bluetooth/mgmt.h>
  35
  36 #include "hci_request.h"
  37 #include "hci_debugfs.h"
  38 #include "hci_codec.h"
  39 #include "a2mp.h"
  40 #include "amp.h"
  41 #include "smp.h"
  42 #include "msft.h"
  43 #include "eir.h"
  44
  45 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
  46                  "\x00\x00\x00\x00\x00\x00\x00\x00"
  47
  48 #define secs_to_jiffies(_secs) msecs_to_jiffies((_secs) * 1000)
  49
  50 /* Handle HCI Event packets */
  51
  52 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
  53                              u8 ev, size_t len)
  54 {
  55         void *data;
  56
  57         data = skb_pull_data(skb, len);
  58         if (!data)
  59                 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev);
  60
  61         return data;
  62 }
  63
  64 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
  65                              u16 op, size_t len)
  66 {
  67         void *data;
  68
  69         data = skb_pull_data(skb, len);
  70         if (!data)
  71                 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op);
  72
  73         return data;
  74 }
  75
  76 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
  77                                 u8 ev, size_t len)
  78 {
  79         void *data;
  80
  81         data = skb_pull_data(skb, len);
  82         if (!data)
  83                 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev);
  84
  85         return data;
  86 }
  87
  88 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data,
  89                                 struct sk_buff *skb)
  90 {
  91         struct hci_ev_status *rp = data;
  92
  93         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
  94
  95         /* It is possible that we receive Inquiry Complete event right
  96          * before we receive Inquiry Cancel Command Complete event, in
  97          * which case the latter event should have status of Command
  98          * Disallowed (0x0c). This should not be treated as error, since
  99          * we actually achieve what Inquiry Cancel wants to achieve,
 100          * which is to end the last Inquiry session.
 101          */
 102         if (rp->status == 0x0c && !test_bit(HCI_INQUIRY, &hdev->flags)) {
 103                 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
 104                 rp->status = 0x00;
 105         }
 106
 107         if (rp->status)
 108                 return rp->status;
 109
 110         clear_bit(HCI_INQUIRY, &hdev->flags);
 111         smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
 112         wake_up_bit(&hdev->flags, HCI_INQUIRY);
 113
 114         hci_dev_lock(hdev);
 115         /* Set discovery state to stopped if we're not doing LE active
 116          * scanning.
 117          */
 118         if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
 119             hdev->le_scan_type != LE_SCAN_ACTIVE)
 120                 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
 121         hci_dev_unlock(hdev);
 122
 123         hci_conn_check_pending(hdev);
 124
 125         return rp->status;
 126 }
 127
 128 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data,
 129                               struct sk_buff *skb)
 130 {
 131         struct hci_ev_status *rp = data;
 132
 133         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 134
 135         if (rp->status)
 136                 return rp->status;
 137
 138         hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
 139
 140         return rp->status;
 141 }
 142
 143 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data,
 144                                    struct sk_buff *skb)
 145 {
 146         struct hci_ev_status *rp = data;
 147
 148         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 149
 150         if (rp->status)
 151                 return rp->status;
 152
 153         hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
 154
 155         hci_conn_check_pending(hdev);
 156
 157         return rp->status;
 158 }
 159
 160 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data,
 161                                         struct sk_buff *skb)
 162 {
 163         struct hci_ev_status *rp = data;
 164
 165         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 166
 167         return rp->status;
 168 }
 169
 170 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
 171                                 struct sk_buff *skb)
 172 {
 173         struct hci_rp_role_discovery *rp = data;
 174         struct hci_conn *conn;
 175
 176         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 177
 178         if (rp->status)
 179                 return rp->status;
 180
 181         hci_dev_lock(hdev);
 182
 183         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 184         if (conn)
 185                 conn->role = rp->role;
 186
 187         hci_dev_unlock(hdev);
 188
 189         return rp->status;
 190 }
 191
 192 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
 193                                   struct sk_buff *skb)
 194 {
 195         struct hci_rp_read_link_policy *rp = data;
 196         struct hci_conn *conn;
 197
 198         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 199
 200         if (rp->status)
 201                 return rp->status;
 202
 203         hci_dev_lock(hdev);
 204
 205         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 206         if (conn)
 207                 conn->link_policy = __le16_to_cpu(rp->policy);
 208
 209         hci_dev_unlock(hdev);
 210
 211         return rp->status;
 212 }
 213
 214 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
 215                                    struct sk_buff *skb)
 216 {
 217         struct hci_rp_write_link_policy *rp = data;
 218         struct hci_conn *conn;
 219         void *sent;
 220
 221         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 222
 223         if (rp->status)
 224                 return rp->status;
 225
 226         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
 227         if (!sent)
 228                 return rp->status;
 229
 230         hci_dev_lock(hdev);
 231
 232         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 233         if (conn)
 234                 conn->link_policy = get_unaligned_le16(sent + 2);
 235
 236         hci_dev_unlock(hdev);
 237
 238         return rp->status;
 239 }
 240
 241 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
 242                                       struct sk_buff *skb)
 243 {
 244         struct hci_rp_read_def_link_policy *rp = data;
 245
 246         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 247
 248         if (rp->status)
 249                 return rp->status;
 250
 251         hdev->link_policy = __le16_to_cpu(rp->policy);
 252
 253         return rp->status;
 254 }
 255
 256 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
 257                                        struct sk_buff *skb)
 258 {
 259         struct hci_ev_status *rp = data;
 260         void *sent;
 261
 262         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 263
 264         if (rp->status)
 265                 return rp->status;
 266
 267         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
 268         if (!sent)
 269                 return rp->status;
 270
 271         hdev->link_policy = get_unaligned_le16(sent);
 272
 273         return rp->status;
 274 }
 275
 276 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
 277 {
 278         struct hci_ev_status *rp = data;
 279
 280         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 281
 282         clear_bit(HCI_RESET, &hdev->flags);
 283
 284         if (rp->status)
 285                 return rp->status;
 286
 287         /* Reset all non-persistent flags */
 288         hci_dev_clear_volatile_flags(hdev);
 289
 290         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
 291
 292         hdev->inq_tx_power = HCI_TX_POWER_INVALID;
 293         hdev->adv_tx_power = HCI_TX_POWER_INVALID;
 294
 295         memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
 296         hdev->adv_data_len = 0;
 297
 298         memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
 299         hdev->scan_rsp_data_len = 0;
 300
 301         hdev->le_scan_type = LE_SCAN_PASSIVE;
 302
 303         hdev->ssp_debug_mode = 0;
 304
 305         hci_bdaddr_list_clear(&hdev->le_accept_list);
 306         hci_bdaddr_list_clear(&hdev->le_resolv_list);
 307
 308         return rp->status;
 309 }
 310
 311 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
 312                                       struct sk_buff *skb)
 313 {
 314         struct hci_rp_read_stored_link_key *rp = data;
 315         struct hci_cp_read_stored_link_key *sent;
 316
 317         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 318
 319         sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
 320         if (!sent)
 321                 return rp->status;
 322
 323         if (!rp->status && sent->read_all == 0x01) {
 324                 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
 325                 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
 326         }
 327
 328         return rp->status;
 329 }
 330
 331 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
 332                                         struct sk_buff *skb)
 333 {
 334         struct hci_rp_delete_stored_link_key *rp = data;
 335         u16 num_keys;
 336
 337         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 338
 339         if (rp->status)
 340                 return rp->status;
 341
 342         num_keys = le16_to_cpu(rp->num_keys);
 343
 344         if (num_keys <= hdev->stored_num_keys)
 345                 hdev->stored_num_keys -= num_keys;
 346         else
 347                 hdev->stored_num_keys = 0;
 348
 349         return rp->status;
 350 }
 351
 352 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
 353                                   struct sk_buff *skb)
 354 {
 355         struct hci_ev_status *rp = data;
 356         void *sent;
 357
 358         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 359
 360         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
 361         if (!sent)
 362                 return rp->status;
 363
 364         hci_dev_lock(hdev);
 365
 366         if (hci_dev_test_flag(hdev, HCI_MGMT))
 367                 mgmt_set_local_name_complete(hdev, sent, rp->status);
 368         else if (!rp->status)
 369                 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
 370
 371         hci_dev_unlock(hdev);
 372
 373         return rp->status;
 374 }
 375
 376 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
 377                                  struct sk_buff *skb)
 378 {
 379         struct hci_rp_read_local_name *rp = data;
 380
 381         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 382
 383         if (rp->status)
 384                 return rp->status;
 385
 386         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 387             hci_dev_test_flag(hdev, HCI_CONFIG))
 388                 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
 389
 390         return rp->status;
 391 }
 392
 393 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
 394                                    struct sk_buff *skb)
 395 {
 396         struct hci_ev_status *rp = data;
 397         void *sent;
 398
 399         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 400
 401         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
 402         if (!sent)
 403                 return rp->status;
 404
 405         hci_dev_lock(hdev);
 406
 407         if (!rp->status) {
 408                 __u8 param = *((__u8 *) sent);
 409
 410                 if (param == AUTH_ENABLED)
 411                         set_bit(HCI_AUTH, &hdev->flags);
 412                 else
 413                         clear_bit(HCI_AUTH, &hdev->flags);
 414         }
 415
 416         if (hci_dev_test_flag(hdev, HCI_MGMT))
 417                 mgmt_auth_enable_complete(hdev, rp->status);
 418
 419         hci_dev_unlock(hdev);
 420
 421         return rp->status;
 422 }
 423
 424 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
 425                                     struct sk_buff *skb)
 426 {
 427         struct hci_ev_status *rp = data;
 428         __u8 param;
 429         void *sent;
 430
 431         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 432
 433         if (rp->status)
 434                 return rp->status;
 435
 436         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
 437         if (!sent)
 438                 return rp->status;
 439
 440         param = *((__u8 *) sent);
 441
 442         if (param)
 443                 set_bit(HCI_ENCRYPT, &hdev->flags);
 444         else
 445                 clear_bit(HCI_ENCRYPT, &hdev->flags);
 446
 447         return rp->status;
 448 }
 449
 450 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
 451                                    struct sk_buff *skb)
 452 {
 453         struct hci_ev_status *rp = data;
 454         __u8 param;
 455         void *sent;
 456
 457         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 458
 459         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
 460         if (!sent)
 461                 return rp->status;
 462
 463         param = *((__u8 *) sent);
 464
 465         hci_dev_lock(hdev);
 466
 467         if (rp->status) {
 468                 hdev->discov_timeout = 0;
 469                 goto done;
 470         }
 471
 472         if (param & SCAN_INQUIRY)
 473                 set_bit(HCI_ISCAN, &hdev->flags);
 474         else
 475                 clear_bit(HCI_ISCAN, &hdev->flags);
 476
 477         if (param & SCAN_PAGE)
 478                 set_bit(HCI_PSCAN, &hdev->flags);
 479         else
 480                 clear_bit(HCI_PSCAN, &hdev->flags);
 481
 482 done:
 483         hci_dev_unlock(hdev);
 484
 485         return rp->status;
 486 }
 487
 488 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
 489                                   struct sk_buff *skb)
 490 {
 491         struct hci_ev_status *rp = data;
 492         struct hci_cp_set_event_filter *cp;
 493         void *sent;
 494
 495         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 496
 497         if (rp->status)
 498                 return rp->status;
 499
 500         sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
 501         if (!sent)
 502                 return rp->status;
 503
 504         cp = (struct hci_cp_set_event_filter *)sent;
 505
 506         if (cp->flt_type == HCI_FLT_CLEAR_ALL)
 507                 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
 508         else
 509                 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
 510
 511         return rp->status;
 512 }
 513
 514 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
 515                                    struct sk_buff *skb)
 516 {
 517         struct hci_rp_read_class_of_dev *rp = data;
 518
 519         if (WARN_ON(!hdev))
 520                 return HCI_ERROR_UNSPECIFIED;
 521
 522         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 523
 524         if (rp->status)
 525                 return rp->status;
 526
 527         memcpy(hdev->dev_class, rp->dev_class, 3);
 528
 529         bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
 530                    hdev->dev_class[1], hdev->dev_class[0]);
 531
 532         return rp->status;
 533 }
 534
 535 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
 536                                     struct sk_buff *skb)
 537 {
 538         struct hci_ev_status *rp = data;
 539         void *sent;
 540
 541         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 542
 543         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
 544         if (!sent)
 545                 return rp->status;
 546
 547         hci_dev_lock(hdev);
 548
 549         if (!rp->status)
 550                 memcpy(hdev->dev_class, sent, 3);
 551
 552         if (hci_dev_test_flag(hdev, HCI_MGMT))
 553                 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
 554
 555         hci_dev_unlock(hdev);
 556
 557         return rp->status;
 558 }
 559
 560 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
 561                                     struct sk_buff *skb)
 562 {
 563         struct hci_rp_read_voice_setting *rp = data;
 564         __u16 setting;
 565
 566         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 567
 568         if (rp->status)
 569                 return rp->status;
 570
 571         setting = __le16_to_cpu(rp->voice_setting);
 572
 573         if (hdev->voice_setting == setting)
 574                 return rp->status;
 575
 576         hdev->voice_setting = setting;
 577
 578         bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
 579
 580         if (hdev->notify)
 581                 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
 582
 583         return rp->status;
 584 }
 585
 586 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
 587                                      struct sk_buff *skb)
 588 {
 589         struct hci_ev_status *rp = data;
 590         __u16 setting;
 591         void *sent;
 592
 593         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 594
 595         if (rp->status)
 596                 return rp->status;
 597
 598         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
 599         if (!sent)
 600                 return rp->status;
 601
 602         setting = get_unaligned_le16(sent);
 603
 604         if (hdev->voice_setting == setting)
 605                 return rp->status;
 606
 607         hdev->voice_setting = setting;
 608
 609         bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
 610
 611         if (hdev->notify)
 612                 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
 613
 614         return rp->status;
 615 }
 616
 617 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
 618                                         struct sk_buff *skb)
 619 {
 620         struct hci_rp_read_num_supported_iac *rp = data;
 621
 622         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 623
 624         if (rp->status)
 625                 return rp->status;
 626
 627         hdev->num_iac = rp->num_iac;
 628
 629         bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
 630
 631         return rp->status;
 632 }
 633
 634 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
 635                                 struct sk_buff *skb)
 636 {
 637         struct hci_ev_status *rp = data;
 638         struct hci_cp_write_ssp_mode *sent;
 639
 640         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 641
 642         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
 643         if (!sent)
 644                 return rp->status;
 645
 646         hci_dev_lock(hdev);
 647
 648         if (!rp->status) {
 649                 if (sent->mode)
 650                         hdev->features[1][0] |= LMP_HOST_SSP;
 651                 else
 652                         hdev->features[1][0] &= ~LMP_HOST_SSP;
 653         }
 654
 655         if (!rp->status) {
 656                 if (sent->mode)
 657                         hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
 658                 else
 659                         hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
 660         }
 661
 662         hci_dev_unlock(hdev);
 663
 664         return rp->status;
 665 }
 666
 667 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
 668                                   struct sk_buff *skb)
 669 {
 670         struct hci_ev_status *rp = data;
 671         struct hci_cp_write_sc_support *sent;
 672
 673         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 674
 675         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
 676         if (!sent)
 677                 return rp->status;
 678
 679         hci_dev_lock(hdev);
 680
 681         if (!rp->status) {
 682                 if (sent->support)
 683                         hdev->features[1][0] |= LMP_HOST_SC;
 684                 else
 685                         hdev->features[1][0] &= ~LMP_HOST_SC;
 686         }
 687
 688         if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
 689                 if (sent->support)
 690                         hci_dev_set_flag(hdev, HCI_SC_ENABLED);
 691                 else
 692                         hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
 693         }
 694
 695         hci_dev_unlock(hdev);
 696
 697         return rp->status;
 698 }
 699
 700 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
 701                                     struct sk_buff *skb)
 702 {
 703         struct hci_rp_read_local_version *rp = data;
 704
 705         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 706
 707         if (rp->status)
 708                 return rp->status;
 709
 710         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 711             hci_dev_test_flag(hdev, HCI_CONFIG)) {
 712                 hdev->hci_ver = rp->hci_ver;
 713                 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
 714                 hdev->lmp_ver = rp->lmp_ver;
 715                 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
 716                 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
 717         }
 718
 719         return rp->status;
 720 }
 721
 722 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
 723                                    struct sk_buff *skb)
 724 {
 725         struct hci_rp_read_enc_key_size *rp = data;
 726         struct hci_conn *conn;
 727         u16 handle;
 728         u8 status = rp->status;
 729
 730         bt_dev_dbg(hdev, "status 0x%2.2x", status);
 731
 732         handle = le16_to_cpu(rp->handle);
 733
 734         hci_dev_lock(hdev);
 735
 736         conn = hci_conn_hash_lookup_handle(hdev, handle);
 737         if (!conn) {
 738                 status = 0xFF;
 739                 goto done;
 740         }
 741
 742         /* While unexpected, the read_enc_key_size command may fail. The most
 743          * secure approach is to then assume the key size is 0 to force a
 744          * disconnection.
 745          */
 746         if (status) {
 747                 bt_dev_err(hdev, "failed to read key size for handle %u",
 748                            handle);
 749                 conn->enc_key_size = 0;
 750         } else {
 751                 conn->enc_key_size = rp->key_size;
 752                 status = 0;
 753
 754                 if (conn->enc_key_size < hdev->min_enc_key_size) {
 755                         /* As slave role, the conn->state has been set to
 756                          * BT_CONNECTED and l2cap conn req might not be received
 757                          * yet, at this moment the l2cap layer almost does
 758                          * nothing with the non-zero status.
 759                          * So we also clear encrypt related bits, and then the
 760                          * handler of l2cap conn req will get the right secure
 761                          * state at a later time.
 762                          */
 763                         status = HCI_ERROR_AUTH_FAILURE;
 764                         clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
 765                         clear_bit(HCI_CONN_AES_CCM, &conn->flags);
 766                 }
 767         }
 768
 769         hci_encrypt_cfm(conn, status);
 770
 771 done:
 772         hci_dev_unlock(hdev);
 773
 774         return status;
 775 }
 776
 777 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
 778                                      struct sk_buff *skb)
 779 {
 780         struct hci_rp_read_local_commands *rp = data;
 781
 782         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 783
 784         if (rp->status)
 785                 return rp->status;
 786
 787         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 788             hci_dev_test_flag(hdev, HCI_CONFIG))
 789                 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
 790
 791         return rp->status;
 792 }
 793
 794 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
 795                                            struct sk_buff *skb)
 796 {
 797         struct hci_rp_read_auth_payload_to *rp = data;
 798         struct hci_conn *conn;
 799
 800         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 801
 802         if (rp->status)
 803                 return rp->status;
 804
 805         hci_dev_lock(hdev);
 806
 807         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 808         if (conn)
 809                 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
 810
 811         hci_dev_unlock(hdev);
 812
 813         return rp->status;
 814 }
 815
 816 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
 817                                             struct sk_buff *skb)
 818 {
 819         struct hci_rp_write_auth_payload_to *rp = data;
 820         struct hci_conn *conn;
 821         void *sent;
 822
 823         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 824
 825         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
 826         if (!sent)
 827                 return rp->status;
 828
 829         hci_dev_lock(hdev);
 830
 831         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
 832         if (!conn) {
 833                 rp->status = 0xff;
 834                 goto unlock;
 835         }
 836
 837         if (!rp->status)
 838                 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
 839
 840 unlock:
 841         hci_dev_unlock(hdev);
 842
 843         return rp->status;
 844 }
 845
 846 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
 847                                      struct sk_buff *skb)
 848 {
 849         struct hci_rp_read_local_features *rp = data;
 850
 851         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 852
 853         if (rp->status)
 854                 return rp->status;
 855
 856         memcpy(hdev->features, rp->features, 8);
 857
 858         /* Adjust default settings according to features
 859          * supported by device. */
 860
 861         if (hdev->features[0][0] & LMP_3SLOT)
 862                 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
 863
 864         if (hdev->features[0][0] & LMP_5SLOT)
 865                 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
 866
 867         if (hdev->features[0][1] & LMP_HV2) {
 868                 hdev->pkt_type  |= (HCI_HV2);
 869                 hdev->esco_type |= (ESCO_HV2);
 870         }
 871
 872         if (hdev->features[0][1] & LMP_HV3) {
 873                 hdev->pkt_type  |= (HCI_HV3);
 874                 hdev->esco_type |= (ESCO_HV3);
 875         }
 876
 877         if (lmp_esco_capable(hdev))
 878                 hdev->esco_type |= (ESCO_EV3);
 879
 880         if (hdev->features[0][4] & LMP_EV4)
 881                 hdev->esco_type |= (ESCO_EV4);
 882
 883         if (hdev->features[0][4] & LMP_EV5)
 884                 hdev->esco_type |= (ESCO_EV5);
 885
 886         if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
 887                 hdev->esco_type |= (ESCO_2EV3);
 888
 889         if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
 890                 hdev->esco_type |= (ESCO_3EV3);
 891
 892         if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
 893                 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
 894
 895         return rp->status;
 896 }
 897
 898 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
 899                                          struct sk_buff *skb)
 900 {
 901         struct hci_rp_read_local_ext_features *rp = data;
 902
 903         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 904
 905         if (rp->status)
 906                 return rp->status;
 907
 908         if (hdev->max_page < rp->max_page) {
 909                 if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
 910                              &hdev->quirks))
 911                         bt_dev_warn(hdev, "broken local ext features page 2");
 912                 else
 913                         hdev->max_page = rp->max_page;
 914         }
 915
 916         if (rp->page < HCI_MAX_PAGES)
 917                 memcpy(hdev->features[rp->page], rp->features, 8);
 918
 919         return rp->status;
 920 }
 921
 922 static u8 hci_cc_read_flow_control_mode(struct hci_dev *hdev, void *data,
 923                                         struct sk_buff *skb)
 924 {
 925         struct hci_rp_read_flow_control_mode *rp = data;
 926
 927         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 928
 929         if (rp->status)
 930                 return rp->status;
 931
 932         hdev->flow_ctl_mode = rp->mode;
 933
 934         return rp->status;
 935 }
 936
 937 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
 938                                   struct sk_buff *skb)
 939 {
 940         struct hci_rp_read_buffer_size *rp = data;
 941
 942         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 943
 944         if (rp->status)
 945                 return rp->status;
 946
 947         hdev->acl_mtu  = __le16_to_cpu(rp->acl_mtu);
 948         hdev->sco_mtu  = rp->sco_mtu;
 949         hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
 950         hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
 951
 952         if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
 953                 hdev->sco_mtu  = 64;
 954                 hdev->sco_pkts = 8;
 955         }
 956
 957         hdev->acl_cnt = hdev->acl_pkts;
 958         hdev->sco_cnt = hdev->sco_pkts;
 959
 960         BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
 961                hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
 962
 963         return rp->status;
 964 }
 965
 966 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
 967                               struct sk_buff *skb)
 968 {
 969         struct hci_rp_read_bd_addr *rp = data;
 970
 971         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 972
 973         if (rp->status)
 974                 return rp->status;
 975
 976         if (test_bit(HCI_INIT, &hdev->flags))
 977                 bacpy(&hdev->bdaddr, &rp->bdaddr);
 978
 979         if (hci_dev_test_flag(hdev, HCI_SETUP))
 980                 bacpy(&hdev->setup_addr, &rp->bdaddr);
 981
 982         return rp->status;
 983 }
 984
 985 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
 986                                          struct sk_buff *skb)
 987 {
 988         struct hci_rp_read_local_pairing_opts *rp = data;
 989
 990         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
 991
 992         if (rp->status)
 993                 return rp->status;
 994
 995         if (hci_dev_test_flag(hdev, HCI_SETUP) ||
 996             hci_dev_test_flag(hdev, HCI_CONFIG)) {
 997                 hdev->pairing_opts = rp->pairing_opts;
 998                 hdev->max_enc_key_size = rp->max_key_size;
 999         }
1000
1001         return rp->status;
1002 }
1003
1004 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
1005                                          struct sk_buff *skb)
1006 {
1007         struct hci_rp_read_page_scan_activity *rp = data;
1008
1009         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1010
1011         if (rp->status)
1012                 return rp->status;
1013
1014         if (test_bit(HCI_INIT, &hdev->flags)) {
1015                 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
1016                 hdev->page_scan_window = __le16_to_cpu(rp->window);
1017         }
1018
1019         return rp->status;
1020 }
1021
1022 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1023                                           struct sk_buff *skb)
1024 {
1025         struct hci_ev_status *rp = data;
1026         struct hci_cp_write_page_scan_activity *sent;
1027
1028         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1029
1030         if (rp->status)
1031                 return rp->status;
1032
1033         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1034         if (!sent)
1035                 return rp->status;
1036
1037         hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1038         hdev->page_scan_window = __le16_to_cpu(sent->window);
1039
1040         return rp->status;
1041 }
1042
1043 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1044                                      struct sk_buff *skb)
1045 {
1046         struct hci_rp_read_page_scan_type *rp = data;
1047
1048         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1049
1050         if (rp->status)
1051                 return rp->status;
1052
1053         if (test_bit(HCI_INIT, &hdev->flags))
1054                 hdev->page_scan_type = rp->type;
1055
1056         return rp->status;
1057 }
1058
1059 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1060                                       struct sk_buff *skb)
1061 {
1062         struct hci_ev_status *rp = data;
1063         u8 *type;
1064
1065         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1066
1067         if (rp->status)
1068                 return rp->status;
1069
1070         type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1071         if (type)
1072                 hdev->page_scan_type = *type;
1073
1074         return rp->status;
1075 }
1076
1077 static u8 hci_cc_read_data_block_size(struct hci_dev *hdev, void *data,
1078                                       struct sk_buff *skb)
1079 {
1080         struct hci_rp_read_data_block_size *rp = data;
1081
1082         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1083
1084         if (rp->status)
1085                 return rp->status;
1086
1087         hdev->block_mtu = __le16_to_cpu(rp->max_acl_len);
1088         hdev->block_len = __le16_to_cpu(rp->block_len);
1089         hdev->num_blocks = __le16_to_cpu(rp->num_blocks);
1090
1091         hdev->block_cnt = hdev->num_blocks;
1092
1093         BT_DBG("%s blk mtu %d cnt %d len %d", hdev->name, hdev->block_mtu,
1094                hdev->block_cnt, hdev->block_len);
1095
1096         return rp->status;
1097 }
1098
1099 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1100                             struct sk_buff *skb)
1101 {
1102         struct hci_rp_read_clock *rp = data;
1103         struct hci_cp_read_clock *cp;
1104         struct hci_conn *conn;
1105
1106         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1107
1108         if (rp->status)
1109                 return rp->status;
1110
1111         hci_dev_lock(hdev);
1112
1113         cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1114         if (!cp)
1115                 goto unlock;
1116
1117         if (cp->which == 0x00) {
1118                 hdev->clock = le32_to_cpu(rp->clock);
1119                 goto unlock;
1120         }
1121
1122         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1123         if (conn) {
1124                 conn->clock = le32_to_cpu(rp->clock);
1125                 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1126         }
1127
1128 unlock:
1129         hci_dev_unlock(hdev);
1130         return rp->status;
1131 }
1132
1133 static u8 hci_cc_read_local_amp_info(struct hci_dev *hdev, void *data,
1134                                      struct sk_buff *skb)
1135 {
1136         struct hci_rp_read_local_amp_info *rp = data;
1137
1138         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1139
1140         if (rp->status)
1141                 return rp->status;
1142
1143         hdev->amp_status = rp->amp_status;
1144         hdev->amp_total_bw = __le32_to_cpu(rp->total_bw);
1145         hdev->amp_max_bw = __le32_to_cpu(rp->max_bw);
1146         hdev->amp_min_latency = __le32_to_cpu(rp->min_latency);
1147         hdev->amp_max_pdu = __le32_to_cpu(rp->max_pdu);
1148         hdev->amp_type = rp->amp_type;
1149         hdev->amp_pal_cap = __le16_to_cpu(rp->pal_cap);
1150         hdev->amp_assoc_size = __le16_to_cpu(rp->max_assoc_size);
1151         hdev->amp_be_flush_to = __le32_to_cpu(rp->be_flush_to);
1152         hdev->amp_max_flush_to = __le32_to_cpu(rp->max_flush_to);
1153
1154         return rp->status;
1155 }
1156
1157 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1158                                        struct sk_buff *skb)
1159 {
1160         struct hci_rp_read_inq_rsp_tx_power *rp = data;
1161
1162         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1163
1164         if (rp->status)
1165                 return rp->status;
1166
1167         hdev->inq_tx_power = rp->tx_power;
1168
1169         return rp->status;
1170 }
1171
1172 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1173                                              struct sk_buff *skb)
1174 {
1175         struct hci_rp_read_def_err_data_reporting *rp = data;
1176
1177         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1178
1179         if (rp->status)
1180                 return rp->status;
1181
1182         hdev->err_data_reporting = rp->err_data_reporting;
1183
1184         return rp->status;
1185 }
1186
1187 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1188                                               struct sk_buff *skb)
1189 {
1190         struct hci_ev_status *rp = data;
1191         struct hci_cp_write_def_err_data_reporting *cp;
1192
1193         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1194
1195         if (rp->status)
1196                 return rp->status;
1197
1198         cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1199         if (!cp)
1200                 return rp->status;
1201
1202         hdev->err_data_reporting = cp->err_data_reporting;
1203
1204         return rp->status;
1205 }
1206
1207 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1208                                 struct sk_buff *skb)
1209 {
1210         struct hci_rp_pin_code_reply *rp = data;
1211         struct hci_cp_pin_code_reply *cp;
1212         struct hci_conn *conn;
1213
1214         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1215
1216         hci_dev_lock(hdev);
1217
1218         if (hci_dev_test_flag(hdev, HCI_MGMT))
1219                 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1220
1221         if (rp->status)
1222                 goto unlock;
1223
1224         cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1225         if (!cp)
1226                 goto unlock;
1227
1228         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1229         if (conn)
1230                 conn->pin_length = cp->pin_len;
1231
1232 unlock:
1233         hci_dev_unlock(hdev);
1234         return rp->status;
1235 }
1236
1237 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1238                                     struct sk_buff *skb)
1239 {
1240         struct hci_rp_pin_code_neg_reply *rp = data;
1241
1242         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1243
1244         hci_dev_lock(hdev);
1245
1246         if (hci_dev_test_flag(hdev, HCI_MGMT))
1247                 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1248                                                  rp->status);
1249
1250         hci_dev_unlock(hdev);
1251
1252         return rp->status;
1253 }
1254
1255 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1256                                      struct sk_buff *skb)
1257 {
1258         struct hci_rp_le_read_buffer_size *rp = data;
1259
1260         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1261
1262         if (rp->status)
1263                 return rp->status;
1264
1265         hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1266         hdev->le_pkts = rp->le_max_pkt;
1267
1268         hdev->le_cnt = hdev->le_pkts;
1269
1270         BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1271
1272         return rp->status;
1273 }
1274
1275 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1276                                         struct sk_buff *skb)
1277 {
1278         struct hci_rp_le_read_local_features *rp = data;
1279
1280         BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1281
1282         if (rp->status)
1283                 return rp->status;
1284
1285         memcpy(hdev->le_features, rp->features, 8);
1286
1287         return rp->status;
1288 }
1289
1290 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1291                                       struct sk_buff *skb)
1292 {
1293         struct hci_rp_le_read_adv_tx_power *rp = data;
1294
1295         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1296
1297         if (rp->status)
1298                 return rp->status;
1299
1300         hdev->adv_tx_power = rp->tx_power;
1301
1302         return rp->status;
1303 }
1304
1305 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1306                                     struct sk_buff *skb)
1307 {
1308         struct hci_rp_user_confirm_reply *rp = data;
1309
1310         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1311
1312         hci_dev_lock(hdev);
1313
1314         if (hci_dev_test_flag(hdev, HCI_MGMT))
1315                 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1316                                                  rp->status);
1317
1318         hci_dev_unlock(hdev);
1319
1320         return rp->status;
1321 }
1322
1323 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1324                                         struct sk_buff *skb)
1325 {
1326         struct hci_rp_user_confirm_reply *rp = data;
1327
1328         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1329
1330         hci_dev_lock(hdev);
1331
1332         if (hci_dev_test_flag(hdev, HCI_MGMT))
1333                 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1334                                                      ACL_LINK, 0, rp->status);
1335
1336         hci_dev_unlock(hdev);
1337
1338         return rp->status;
1339 }
1340
1341 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1342                                     struct sk_buff *skb)
1343 {
1344         struct hci_rp_user_confirm_reply *rp = data;
1345
1346         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1347
1348         hci_dev_lock(hdev);
1349
1350         if (hci_dev_test_flag(hdev, HCI_MGMT))
1351                 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1352                                                  0, rp->status);
1353
1354         hci_dev_unlock(hdev);
1355
1356         return rp->status;
1357 }
1358
1359 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1360                                         struct sk_buff *skb)
1361 {
1362         struct hci_rp_user_confirm_reply *rp = data;
1363
1364         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1365
1366         hci_dev_lock(hdev);
1367
1368         if (hci_dev_test_flag(hdev, HCI_MGMT))
1369                 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1370                                                      ACL_LINK, 0, rp->status);
1371
1372         hci_dev_unlock(hdev);
1373
1374         return rp->status;
1375 }
1376
1377 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1378                                      struct sk_buff *skb)
1379 {
1380         struct hci_rp_read_local_oob_data *rp = data;
1381
1382         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1383
1384         return rp->status;
1385 }
1386
1387 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1388                                          struct sk_buff *skb)
1389 {
1390         struct hci_rp_read_local_oob_ext_data *rp = data;
1391
1392         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1393
1394         return rp->status;
1395 }
1396
1397 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1398                                     struct sk_buff *skb)
1399 {
1400         struct hci_ev_status *rp = data;
1401         bdaddr_t *sent;
1402
1403         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1404
1405         if (rp->status)
1406                 return rp->status;
1407
1408         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1409         if (!sent)
1410                 return rp->status;
1411
1412         hci_dev_lock(hdev);
1413
1414         bacpy(&hdev->random_addr, sent);
1415
1416         if (!bacmp(&hdev->rpa, sent)) {
1417                 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1418                 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1419                                    secs_to_jiffies(hdev->rpa_timeout));
1420         }
1421
1422         hci_dev_unlock(hdev);
1423
1424         return rp->status;
1425 }
1426
1427 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1428                                     struct sk_buff *skb)
1429 {
1430         struct hci_ev_status *rp = data;
1431         struct hci_cp_le_set_default_phy *cp;
1432
1433         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1434
1435         if (rp->status)
1436                 return rp->status;
1437
1438         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1439         if (!cp)
1440                 return rp->status;
1441
1442         hci_dev_lock(hdev);
1443
1444         hdev->le_tx_def_phys = cp->tx_phys;
1445         hdev->le_rx_def_phys = cp->rx_phys;
1446
1447         hci_dev_unlock(hdev);
1448
1449         return rp->status;
1450 }
1451
1452 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1453                                             struct sk_buff *skb)
1454 {
1455         struct hci_ev_status *rp = data;
1456         struct hci_cp_le_set_adv_set_rand_addr *cp;
1457         struct adv_info *adv;
1458
1459         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1460
1461         if (rp->status)
1462                 return rp->status;
1463
1464         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1465         /* Update only in case the adv instance since handle 0x00 shall be using
1466          * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1467          * non-extended adverting.
1468          */
1469         if (!cp || !cp->handle)
1470                 return rp->status;
1471
1472         hci_dev_lock(hdev);
1473
1474         adv = hci_find_adv_instance(hdev, cp->handle);
1475         if (adv) {
1476                 bacpy(&adv->random_addr, &cp->bdaddr);
1477                 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1478                         adv->rpa_expired = false;
1479                         queue_delayed_work(hdev->workqueue,
1480                                            &adv->rpa_expired_cb,
1481                                            secs_to_jiffies(hdev->rpa_timeout));
1482                 }
1483         }
1484
1485         hci_dev_unlock(hdev);
1486
1487         return rp->status;
1488 }
1489
1490 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1491                                    struct sk_buff *skb)
1492 {
1493         struct hci_ev_status *rp = data;
1494         u8 *instance;
1495         int err;
1496
1497         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1498
1499         if (rp->status)
1500                 return rp->status;
1501
1502         instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1503         if (!instance)
1504                 return rp->status;
1505
1506         hci_dev_lock(hdev);
1507
1508         err = hci_remove_adv_instance(hdev, *instance);
1509         if (!err)
1510                 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1511                                          *instance);
1512
1513         hci_dev_unlock(hdev);
1514
1515         return rp->status;
1516 }
1517
1518 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1519                                    struct sk_buff *skb)
1520 {
1521         struct hci_ev_status *rp = data;
1522         struct adv_info *adv, *n;
1523         int err;
1524
1525         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1526
1527         if (rp->status)
1528                 return rp->status;
1529
1530         if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1531                 return rp->status;
1532
1533         hci_dev_lock(hdev);
1534
1535         list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1536                 u8 instance = adv->instance;
1537
1538                 err = hci_remove_adv_instance(hdev, instance);
1539                 if (!err)
1540                         mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1541                                                  hdev, instance);
1542         }
1543
1544         hci_dev_unlock(hdev);
1545
1546         return rp->status;
1547 }
1548
1549 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1550                                         struct sk_buff *skb)
1551 {
1552         struct hci_rp_le_read_transmit_power *rp = data;
1553
1554         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1555
1556         if (rp->status)
1557                 return rp->status;
1558
1559         hdev->min_le_tx_power = rp->min_le_tx_power;
1560         hdev->max_le_tx_power = rp->max_le_tx_power;
1561
1562         return rp->status;
1563 }
1564
1565 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1566                                      struct sk_buff *skb)
1567 {
1568         struct hci_ev_status *rp = data;
1569         struct hci_cp_le_set_privacy_mode *cp;
1570         struct hci_conn_params *params;
1571
1572         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1573
1574         if (rp->status)
1575                 return rp->status;
1576
1577         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1578         if (!cp)
1579                 return rp->status;
1580
1581         hci_dev_lock(hdev);
1582
1583         params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1584         if (params)
1585                 WRITE_ONCE(params->privacy_mode, cp->mode);
1586
1587         hci_dev_unlock(hdev);
1588
1589         return rp->status;
1590 }
1591
1592 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1593                                    struct sk_buff *skb)
1594 {
1595         struct hci_ev_status *rp = data;
1596         __u8 *sent;
1597
1598         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1599
1600         if (rp->status)
1601                 return rp->status;
1602
1603         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1604         if (!sent)
1605                 return rp->status;
1606
1607         hci_dev_lock(hdev);
1608
1609         /* If we're doing connection initiation as peripheral. Set a
1610          * timeout in case something goes wrong.
1611          */
1612         if (*sent) {
1613                 struct hci_conn *conn;
1614
1615                 hci_dev_set_flag(hdev, HCI_LE_ADV);
1616
1617                 conn = hci_lookup_le_connect(hdev);
1618                 if (conn)
1619                         queue_delayed_work(hdev->workqueue,
1620                                            &conn->le_conn_timeout,
1621                                            conn->conn_timeout);
1622         } else {
1623                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1624         }
1625
1626         hci_dev_unlock(hdev);
1627
1628         return rp->status;
1629 }
1630
1631 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1632                                        struct sk_buff *skb)
1633 {
1634         struct hci_cp_le_set_ext_adv_enable *cp;
1635         struct hci_cp_ext_adv_set *set;
1636         struct adv_info *adv = NULL, *n;
1637         struct hci_ev_status *rp = data;
1638
1639         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1640
1641         if (rp->status)
1642                 return rp->status;
1643
1644         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1645         if (!cp)
1646                 return rp->status;
1647
1648         set = (void *)cp->data;
1649
1650         hci_dev_lock(hdev);
1651
1652         if (cp->num_of_sets)
1653                 adv = hci_find_adv_instance(hdev, set->handle);
1654
1655         if (cp->enable) {
1656                 struct hci_conn *conn;
1657
1658                 hci_dev_set_flag(hdev, HCI_LE_ADV);
1659
1660                 if (adv && !adv->periodic)
1661                         adv->enabled = true;
1662
1663                 conn = hci_lookup_le_connect(hdev);
1664                 if (conn)
1665                         queue_delayed_work(hdev->workqueue,
1666                                            &conn->le_conn_timeout,
1667                                            conn->conn_timeout);
1668         } else {
1669                 if (cp->num_of_sets) {
1670                         if (adv)
1671                                 adv->enabled = false;
1672
1673                         /* If just one instance was disabled check if there are
1674                          * any other instance enabled before clearing HCI_LE_ADV
1675                          */
1676                         list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1677                                                  list) {
1678                                 if (adv->enabled)
1679                                         goto unlock;
1680                         }
1681                 } else {
1682                         /* All instances shall be considered disabled */
1683                         list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1684                                                  list)
1685                                 adv->enabled = false;
1686                 }
1687
1688                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1689         }
1690
1691 unlock:
1692         hci_dev_unlock(hdev);
1693         return rp->status;
1694 }
1695
1696 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1697                                    struct sk_buff *skb)
1698 {
1699         struct hci_cp_le_set_scan_param *cp;
1700         struct hci_ev_status *rp = data;
1701
1702         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1703
1704         if (rp->status)
1705                 return rp->status;
1706
1707         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1708         if (!cp)
1709                 return rp->status;
1710
1711         hci_dev_lock(hdev);
1712
1713         hdev->le_scan_type = cp->type;
1714
1715         hci_dev_unlock(hdev);
1716
1717         return rp->status;
1718 }
1719
1720 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1721                                        struct sk_buff *skb)
1722 {
1723         struct hci_cp_le_set_ext_scan_params *cp;
1724         struct hci_ev_status *rp = data;
1725         struct hci_cp_le_scan_phy_params *phy_param;
1726
1727         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1728
1729         if (rp->status)
1730                 return rp->status;
1731
1732         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1733         if (!cp)
1734                 return rp->status;
1735
1736         phy_param = (void *)cp->data;
1737
1738         hci_dev_lock(hdev);
1739
1740         hdev->le_scan_type = phy_param->type;
1741
1742         hci_dev_unlock(hdev);
1743
1744         return rp->status;
1745 }
1746
1747 static bool has_pending_adv_report(struct hci_dev *hdev)
1748 {
1749         struct discovery_state *d = &hdev->discovery;
1750
1751         return bacmp(&d->last_adv_addr, BDADDR_ANY);
1752 }
1753
1754 static void clear_pending_adv_report(struct hci_dev *hdev)
1755 {
1756         struct discovery_state *d = &hdev->discovery;
1757
1758         bacpy(&d->last_adv_addr, BDADDR_ANY);
1759         d->last_adv_data_len = 0;
1760 }
1761
1762 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1763                                      u8 bdaddr_type, s8 rssi, u32 flags,
1764                                      u8 *data, u8 len)
1765 {
1766         struct discovery_state *d = &hdev->discovery;
1767
1768         if (len > max_adv_len(hdev))
1769                 return;
1770
1771         bacpy(&d->last_adv_addr, bdaddr);
1772         d->last_adv_addr_type = bdaddr_type;
1773         d->last_adv_rssi = rssi;
1774         d->last_adv_flags = flags;
1775         memcpy(d->last_adv_data, data, len);
1776         d->last_adv_data_len = len;
1777 }
1778
1779 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1780 {
1781         hci_dev_lock(hdev);
1782
1783         switch (enable) {
1784         case LE_SCAN_ENABLE:
1785                 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1786                 if (hdev->le_scan_type == LE_SCAN_ACTIVE)
1787                         clear_pending_adv_report(hdev);
1788                 if (hci_dev_test_flag(hdev, HCI_MESH))
1789                         hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1790                 break;
1791
1792         case LE_SCAN_DISABLE:
1793                 /* We do this here instead of when setting DISCOVERY_STOPPED
1794                  * since the latter would potentially require waiting for
1795                  * inquiry to stop too.
1796                  */
1797                 if (has_pending_adv_report(hdev)) {
1798                         struct discovery_state *d = &hdev->discovery;
1799
1800                         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1801                                           d->last_adv_addr_type, NULL,
1802                                           d->last_adv_rssi, d->last_adv_flags,
1803                                           d->last_adv_data,
1804                                           d->last_adv_data_len, NULL, 0, 0);
1805                 }
1806
1807                 /* Cancel this timer so that we don't try to disable scanning
1808                  * when it's already disabled.
1809                  */
1810                 cancel_delayed_work(&hdev->le_scan_disable);
1811
1812                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1813
1814                 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1815                  * interrupted scanning due to a connect request. Mark
1816                  * therefore discovery as stopped.
1817                  */
1818                 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1819                         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1820                 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1821                          hdev->discovery.state == DISCOVERY_FINDING)
1822                         queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1823
1824                 break;
1825
1826         default:
1827                 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1828                            enable);
1829                 break;
1830         }
1831
1832         hci_dev_unlock(hdev);
1833 }
1834
1835 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1836                                     struct sk_buff *skb)
1837 {
1838         struct hci_cp_le_set_scan_enable *cp;
1839         struct hci_ev_status *rp = data;
1840
1841         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1842
1843         if (rp->status)
1844                 return rp->status;
1845
1846         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1847         if (!cp)
1848                 return rp->status;
1849
1850         le_set_scan_enable_complete(hdev, cp->enable);
1851
1852         return rp->status;
1853 }
1854
1855 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1856                                         struct sk_buff *skb)
1857 {
1858         struct hci_cp_le_set_ext_scan_enable *cp;
1859         struct hci_ev_status *rp = data;
1860
1861         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1862
1863         if (rp->status)
1864                 return rp->status;
1865
1866         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1867         if (!cp)
1868                 return rp->status;
1869
1870         le_set_scan_enable_complete(hdev, cp->enable);
1871
1872         return rp->status;
1873 }
1874
1875 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1876                                       struct sk_buff *skb)
1877 {
1878         struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1879
1880         bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1881                    rp->num_of_sets);
1882
1883         if (rp->status)
1884                 return rp->status;
1885
1886         hdev->le_num_of_adv_sets = rp->num_of_sets;
1887
1888         return rp->status;
1889 }
1890
1891 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1892                                           struct sk_buff *skb)
1893 {
1894         struct hci_rp_le_read_accept_list_size *rp = data;
1895
1896         bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1897
1898         if (rp->status)
1899                 return rp->status;
1900
1901         hdev->le_accept_list_size = rp->size;
1902
1903         return rp->status;
1904 }
1905
1906 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1907                                       struct sk_buff *skb)
1908 {
1909         struct hci_ev_status *rp = data;
1910
1911         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1912
1913         if (rp->status)
1914                 return rp->status;
1915
1916         hci_dev_lock(hdev);
1917         hci_bdaddr_list_clear(&hdev->le_accept_list);
1918         hci_dev_unlock(hdev);
1919
1920         return rp->status;
1921 }
1922
1923 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1924                                        struct sk_buff *skb)
1925 {
1926         struct hci_cp_le_add_to_accept_list *sent;
1927         struct hci_ev_status *rp = data;
1928
1929         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1930
1931         if (rp->status)
1932                 return rp->status;
1933
1934         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1935         if (!sent)
1936                 return rp->status;
1937
1938         hci_dev_lock(hdev);
1939         hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1940                             sent->bdaddr_type);
1941         hci_dev_unlock(hdev);
1942
1943         return rp->status;
1944 }
1945
1946 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1947                                          struct sk_buff *skb)
1948 {
1949         struct hci_cp_le_del_from_accept_list *sent;
1950         struct hci_ev_status *rp = data;
1951
1952         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1953
1954         if (rp->status)
1955                 return rp->status;
1956
1957         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1958         if (!sent)
1959                 return rp->status;
1960
1961         hci_dev_lock(hdev);
1962         hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1963                             sent->bdaddr_type);
1964         hci_dev_unlock(hdev);
1965
1966         return rp->status;
1967 }
1968
1969 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1970                                           struct sk_buff *skb)
1971 {
1972         struct hci_rp_le_read_supported_states *rp = data;
1973
1974         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1975
1976         if (rp->status)
1977                 return rp->status;
1978
1979         memcpy(hdev->le_states, rp->le_states, 8);
1980
1981         return rp->status;
1982 }
1983
1984 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1985                                       struct sk_buff *skb)
1986 {
1987         struct hci_rp_le_read_def_data_len *rp = data;
1988
1989         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1990
1991         if (rp->status)
1992                 return rp->status;
1993
1994         hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1995         hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1996
1997         return rp->status;
1998 }
1999
2000 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
2001                                        struct sk_buff *skb)
2002 {
2003         struct hci_cp_le_write_def_data_len *sent;
2004         struct hci_ev_status *rp = data;
2005
2006         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2007
2008         if (rp->status)
2009                 return rp->status;
2010
2011         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
2012         if (!sent)
2013                 return rp->status;
2014
2015         hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
2016         hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
2017
2018         return rp->status;
2019 }
2020
2021 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
2022                                        struct sk_buff *skb)
2023 {
2024         struct hci_cp_le_add_to_resolv_list *sent;
2025         struct hci_ev_status *rp = data;
2026
2027         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2028
2029         if (rp->status)
2030                 return rp->status;
2031
2032         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
2033         if (!sent)
2034                 return rp->status;
2035
2036         hci_dev_lock(hdev);
2037         hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2038                                 sent->bdaddr_type, sent->peer_irk,
2039                                 sent->local_irk);
2040         hci_dev_unlock(hdev);
2041
2042         return rp->status;
2043 }
2044
2045 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
2046                                          struct sk_buff *skb)
2047 {
2048         struct hci_cp_le_del_from_resolv_list *sent;
2049         struct hci_ev_status *rp = data;
2050
2051         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2052
2053         if (rp->status)
2054                 return rp->status;
2055
2056         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
2057         if (!sent)
2058                 return rp->status;
2059
2060         hci_dev_lock(hdev);
2061         hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2062                             sent->bdaddr_type);
2063         hci_dev_unlock(hdev);
2064
2065         return rp->status;
2066 }
2067
2068 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2069                                       struct sk_buff *skb)
2070 {
2071         struct hci_ev_status *rp = data;
2072
2073         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2074
2075         if (rp->status)
2076                 return rp->status;
2077
2078         hci_dev_lock(hdev);
2079         hci_bdaddr_list_clear(&hdev->le_resolv_list);
2080         hci_dev_unlock(hdev);
2081
2082         return rp->status;
2083 }
2084
2085 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2086                                           struct sk_buff *skb)
2087 {
2088         struct hci_rp_le_read_resolv_list_size *rp = data;
2089
2090         bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2091
2092         if (rp->status)
2093                 return rp->status;
2094
2095         hdev->le_resolv_list_size = rp->size;
2096
2097         return rp->status;
2098 }
2099
2100 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2101                                                struct sk_buff *skb)
2102 {
2103         struct hci_ev_status *rp = data;
2104         __u8 *sent;
2105
2106         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2107
2108         if (rp->status)
2109                 return rp->status;
2110
2111         sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2112         if (!sent)
2113                 return rp->status;
2114
2115         hci_dev_lock(hdev);
2116
2117         if (*sent)
2118                 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2119         else
2120                 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2121
2122         hci_dev_unlock(hdev);
2123
2124         return rp->status;
2125 }
2126
2127 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2128                                       struct sk_buff *skb)
2129 {
2130         struct hci_rp_le_read_max_data_len *rp = data;
2131
2132         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2133
2134         if (rp->status)
2135                 return rp->status;
2136
2137         hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2138         hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2139         hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2140         hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2141
2142         return rp->status;
2143 }
2144
2145 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2146                                          struct sk_buff *skb)
2147 {
2148         struct hci_cp_write_le_host_supported *sent;
2149         struct hci_ev_status *rp = data;
2150
2151         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2152
2153         if (rp->status)
2154                 return rp->status;
2155
2156         sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2157         if (!sent)
2158                 return rp->status;
2159
2160         hci_dev_lock(hdev);
2161
2162         if (sent->le) {
2163                 hdev->features[1][0] |= LMP_HOST_LE;
2164                 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2165         } else {
2166                 hdev->features[1][0] &= ~LMP_HOST_LE;
2167                 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2168                 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2169         }
2170
2171         if (sent->simul)
2172                 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2173         else
2174                 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2175
2176         hci_dev_unlock(hdev);
2177
2178         return rp->status;
2179 }
2180
2181 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2182                                struct sk_buff *skb)
2183 {
2184         struct hci_cp_le_set_adv_param *cp;
2185         struct hci_ev_status *rp = data;
2186
2187         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2188
2189         if (rp->status)
2190                 return rp->status;
2191
2192         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2193         if (!cp)
2194                 return rp->status;
2195
2196         hci_dev_lock(hdev);
2197         hdev->adv_addr_type = cp->own_address_type;
2198         hci_dev_unlock(hdev);
2199
2200         return rp->status;
2201 }
2202
2203 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2204                                    struct sk_buff *skb)
2205 {
2206         struct hci_rp_le_set_ext_adv_params *rp = data;
2207         struct hci_cp_le_set_ext_adv_params *cp;
2208         struct adv_info *adv_instance;
2209
2210         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2211
2212         if (rp->status)
2213                 return rp->status;
2214
2215         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2216         if (!cp)
2217                 return rp->status;
2218
2219         hci_dev_lock(hdev);
2220         hdev->adv_addr_type = cp->own_addr_type;
2221         if (!cp->handle) {
2222                 /* Store in hdev for instance 0 */
2223                 hdev->adv_tx_power = rp->tx_power;
2224         } else {
2225                 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2226                 if (adv_instance)
2227                         adv_instance->tx_power = rp->tx_power;
2228         }
2229         /* Update adv data as tx power is known now */
2230         hci_update_adv_data(hdev, cp->handle);
2231
2232         hci_dev_unlock(hdev);
2233
2234         return rp->status;
2235 }
2236
2237 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2238                            struct sk_buff *skb)
2239 {
2240         struct hci_rp_read_rssi *rp = data;
2241         struct hci_conn *conn;
2242
2243         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2244
2245         if (rp->status)
2246                 return rp->status;
2247
2248         hci_dev_lock(hdev);
2249
2250         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2251         if (conn)
2252                 conn->rssi = rp->rssi;
2253
2254         hci_dev_unlock(hdev);
2255
2256         return rp->status;
2257 }
2258
2259 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2260                                struct sk_buff *skb)
2261 {
2262         struct hci_cp_read_tx_power *sent;
2263         struct hci_rp_read_tx_power *rp = data;
2264         struct hci_conn *conn;
2265
2266         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2267
2268         if (rp->status)
2269                 return rp->status;
2270
2271         sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2272         if (!sent)
2273                 return rp->status;
2274
2275         hci_dev_lock(hdev);
2276
2277         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2278         if (!conn)
2279                 goto unlock;
2280
2281         switch (sent->type) {
2282         case 0x00:
2283                 conn->tx_power = rp->tx_power;
2284                 break;
2285         case 0x01:
2286                 conn->max_tx_power = rp->tx_power;
2287                 break;
2288         }
2289
2290 unlock:
2291         hci_dev_unlock(hdev);
2292         return rp->status;
2293 }
2294
2295 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2296                                       struct sk_buff *skb)
2297 {
2298         struct hci_ev_status *rp = data;
2299         u8 *mode;
2300
2301         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2302
2303         if (rp->status)
2304                 return rp->status;
2305
2306         mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2307         if (mode)
2308                 hdev->ssp_debug_mode = *mode;
2309
2310         return rp->status;
2311 }
2312
2313 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2314 {
2315         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2316
2317         if (status) {
2318                 hci_conn_check_pending(hdev);
2319                 return;
2320         }
2321
2322         if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2323                 set_bit(HCI_INQUIRY, &hdev->flags);
2324 }
2325
2326 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2327 {
2328         struct hci_cp_create_conn *cp;
2329         struct hci_conn *conn;
2330
2331         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2332
2333         cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2334         if (!cp)
2335                 return;
2336
2337         hci_dev_lock(hdev);
2338
2339         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2340
2341         bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2342
2343         if (status) {
2344                 if (conn && conn->state == BT_CONNECT) {
2345                         if (status != 0x0c || conn->attempt > 2) {
2346                                 conn->state = BT_CLOSED;
2347                                 hci_connect_cfm(conn, status);
2348                                 hci_conn_del(conn);
2349                         } else
2350                                 conn->state = BT_CONNECT2;
2351                 }
2352         } else {
2353                 if (!conn) {
2354                         conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2355                                                   HCI_ROLE_MASTER);
2356                         if (!conn)
2357                                 bt_dev_err(hdev, "no memory for new connection");
2358                 }
2359         }
2360
2361         hci_dev_unlock(hdev);
2362 }
2363
2364 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2365 {
2366         struct hci_cp_add_sco *cp;
2367         struct hci_conn *acl;
2368         struct hci_link *link;
2369         __u16 handle;
2370
2371         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2372
2373         if (!status)
2374                 return;
2375
2376         cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2377         if (!cp)
2378                 return;
2379
2380         handle = __le16_to_cpu(cp->handle);
2381
2382         bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2383
2384         hci_dev_lock(hdev);
2385
2386         acl = hci_conn_hash_lookup_handle(hdev, handle);
2387         if (acl) {
2388                 link = list_first_entry_or_null(&acl->link_list,
2389                                                 struct hci_link, list);
2390                 if (link && link->conn) {
2391                         link->conn->state = BT_CLOSED;
2392
2393                         hci_connect_cfm(link->conn, status);
2394                         hci_conn_del(link->conn);
2395                 }
2396         }
2397
2398         hci_dev_unlock(hdev);
2399 }
2400
2401 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2402 {
2403         struct hci_cp_auth_requested *cp;
2404         struct hci_conn *conn;
2405
2406         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2407
2408         if (!status)
2409                 return;
2410
2411         cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2412         if (!cp)
2413                 return;
2414
2415         hci_dev_lock(hdev);
2416
2417         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2418         if (conn) {
2419                 if (conn->state == BT_CONFIG) {
2420                         hci_connect_cfm(conn, status);
2421                         hci_conn_drop(conn);
2422                 }
2423         }
2424
2425         hci_dev_unlock(hdev);
2426 }
2427
2428 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2429 {
2430         struct hci_cp_set_conn_encrypt *cp;
2431         struct hci_conn *conn;
2432
2433         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2434
2435         if (!status)
2436                 return;
2437
2438         cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2439         if (!cp)
2440                 return;
2441
2442         hci_dev_lock(hdev);
2443
2444         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2445         if (conn) {
2446                 if (conn->state == BT_CONFIG) {
2447                         hci_connect_cfm(conn, status);
2448                         hci_conn_drop(conn);
2449                 }
2450         }
2451
2452         hci_dev_unlock(hdev);
2453 }
2454
2455 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2456                                     struct hci_conn *conn)
2457 {
2458         if (conn->state != BT_CONFIG || !conn->out)
2459                 return 0;
2460
2461         if (conn->pending_sec_level == BT_SECURITY_SDP)
2462                 return 0;
2463
2464         /* Only request authentication for SSP connections or non-SSP
2465          * devices with sec_level MEDIUM or HIGH or if MITM protection
2466          * is requested.
2467          */
2468         if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2469             conn->pending_sec_level != BT_SECURITY_FIPS &&
2470             conn->pending_sec_level != BT_SECURITY_HIGH &&
2471             conn->pending_sec_level != BT_SECURITY_MEDIUM)
2472                 return 0;
2473
2474         return 1;
2475 }
2476
2477 static int hci_resolve_name(struct hci_dev *hdev,
2478                                    struct inquiry_entry *e)
2479 {
2480         struct hci_cp_remote_name_req cp;
2481
2482         memset(&cp, 0, sizeof(cp));
2483
2484         bacpy(&cp.bdaddr, &e->data.bdaddr);
2485         cp.pscan_rep_mode = e->data.pscan_rep_mode;
2486         cp.pscan_mode = e->data.pscan_mode;
2487         cp.clock_offset = e->data.clock_offset;
2488
2489         return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2490 }
2491
2492 static bool hci_resolve_next_name(struct hci_dev *hdev)
2493 {
2494         struct discovery_state *discov = &hdev->discovery;
2495         struct inquiry_entry *e;
2496
2497         if (list_empty(&discov->resolve))
2498                 return false;
2499
2500         /* We should stop if we already spent too much time resolving names. */
2501         if (time_after(jiffies, discov->name_resolve_timeout)) {
2502                 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2503                 return false;
2504         }
2505
2506         e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2507         if (!e)
2508                 return false;
2509
2510         if (hci_resolve_name(hdev, e) == 0) {
2511                 e->name_state = NAME_PENDING;
2512                 return true;
2513         }
2514
2515         return false;
2516 }
2517
2518 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2519                                    bdaddr_t *bdaddr, u8 *name, u8 name_len)
2520 {
2521         struct discovery_state *discov = &hdev->discovery;
2522         struct inquiry_entry *e;
2523
2524         /* Update the mgmt connected state if necessary. Be careful with
2525          * conn objects that exist but are not (yet) connected however.
2526          * Only those in BT_CONFIG or BT_CONNECTED states can be
2527          * considered connected.
2528          */
2529         if (conn &&
2530             (conn->state == BT_CONFIG || conn->state == BT_CONNECTED) &&
2531             !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2532                 mgmt_device_connected(hdev, conn, name, name_len);
2533
2534         if (discov->state == DISCOVERY_STOPPED)
2535                 return;
2536
2537         if (discov->state == DISCOVERY_STOPPING)
2538                 goto discov_complete;
2539
2540         if (discov->state != DISCOVERY_RESOLVING)
2541                 return;
2542
2543         e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2544         /* If the device was not found in a list of found devices names of which
2545          * are pending. there is no need to continue resolving a next name as it
2546          * will be done upon receiving another Remote Name Request Complete
2547          * Event */
2548         if (!e)
2549                 return;
2550
2551         list_del(&e->list);
2552
2553         e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2554         mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2555                          name, name_len);
2556
2557         if (hci_resolve_next_name(hdev))
2558                 return;
2559
2560 discov_complete:
2561         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2562 }
2563
2564 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2565 {
2566         struct hci_cp_remote_name_req *cp;
2567         struct hci_conn *conn;
2568
2569         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2570
2571         /* If successful wait for the name req complete event before
2572          * checking for the need to do authentication */
2573         if (!status)
2574                 return;
2575
2576         cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2577         if (!cp)
2578                 return;
2579
2580         hci_dev_lock(hdev);
2581
2582         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2583
2584         if (hci_dev_test_flag(hdev, HCI_MGMT))
2585                 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2586
2587         if (!conn)
2588                 goto unlock;
2589
2590         if (!hci_outgoing_auth_needed(hdev, conn))
2591                 goto unlock;
2592
2593         if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2594                 struct hci_cp_auth_requested auth_cp;
2595
2596                 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2597
2598                 auth_cp.handle = __cpu_to_le16(conn->handle);
2599                 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2600                              sizeof(auth_cp), &auth_cp);
2601         }
2602
2603 unlock:
2604         hci_dev_unlock(hdev);
2605 }
2606
2607 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2608 {
2609         struct hci_cp_read_remote_features *cp;
2610         struct hci_conn *conn;
2611
2612         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2613
2614         if (!status)
2615                 return;
2616
2617         cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2618         if (!cp)
2619                 return;
2620
2621         hci_dev_lock(hdev);
2622
2623         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2624         if (conn) {
2625                 if (conn->state == BT_CONFIG) {
2626                         hci_connect_cfm(conn, status);
2627                         hci_conn_drop(conn);
2628                 }
2629         }
2630
2631         hci_dev_unlock(hdev);
2632 }
2633
2634 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2635 {
2636         struct hci_cp_read_remote_ext_features *cp;
2637         struct hci_conn *conn;
2638
2639         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2640
2641         if (!status)
2642                 return;
2643
2644         cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2645         if (!cp)
2646                 return;
2647
2648         hci_dev_lock(hdev);
2649
2650         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2651         if (conn) {
2652                 if (conn->state == BT_CONFIG) {
2653                         hci_connect_cfm(conn, status);
2654                         hci_conn_drop(conn);
2655                 }
2656         }
2657
2658         hci_dev_unlock(hdev);
2659 }
2660
2661 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2662                                        __u8 status)
2663 {
2664         struct hci_conn *acl;
2665         struct hci_link *link;
2666
2667         bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2668
2669         hci_dev_lock(hdev);
2670
2671         acl = hci_conn_hash_lookup_handle(hdev, handle);
2672         if (acl) {
2673                 link = list_first_entry_or_null(&acl->link_list,
2674                                                 struct hci_link, list);
2675                 if (link && link->conn) {
2676                         link->conn->state = BT_CLOSED;
2677
2678                         hci_connect_cfm(link->conn, status);
2679                         hci_conn_del(link->conn);
2680                 }
2681         }
2682
2683         hci_dev_unlock(hdev);
2684 }
2685
2686 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2687 {
2688         struct hci_cp_setup_sync_conn *cp;
2689
2690         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2691
2692         if (!status)
2693                 return;
2694
2695         cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2696         if (!cp)
2697                 return;
2698
2699         hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2700 }
2701
2702 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2703 {
2704         struct hci_cp_enhanced_setup_sync_conn *cp;
2705
2706         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2707
2708         if (!status)
2709                 return;
2710
2711         cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2712         if (!cp)
2713                 return;
2714
2715         hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2716 }
2717
2718 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2719 {
2720         struct hci_cp_sniff_mode *cp;
2721         struct hci_conn *conn;
2722
2723         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2724
2725         if (!status)
2726                 return;
2727
2728         cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2729         if (!cp)
2730                 return;
2731
2732         hci_dev_lock(hdev);
2733
2734         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2735         if (conn) {
2736                 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2737
2738                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2739                         hci_sco_setup(conn, status);
2740         }
2741
2742         hci_dev_unlock(hdev);
2743 }
2744
2745 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2746 {
2747         struct hci_cp_exit_sniff_mode *cp;
2748         struct hci_conn *conn;
2749
2750         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2751
2752         if (!status)
2753                 return;
2754
2755         cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2756         if (!cp)
2757                 return;
2758
2759         hci_dev_lock(hdev);
2760
2761         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2762         if (conn) {
2763                 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2764
2765                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2766                         hci_sco_setup(conn, status);
2767         }
2768
2769         hci_dev_unlock(hdev);
2770 }
2771
2772 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2773 {
2774         struct hci_cp_disconnect *cp;
2775         struct hci_conn_params *params;
2776         struct hci_conn *conn;
2777         bool mgmt_conn;
2778
2779         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2780
2781         /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2782          * otherwise cleanup the connection immediately.
2783          */
2784         if (!status && !hdev->suspended)
2785                 return;
2786
2787         cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2788         if (!cp)
2789                 return;
2790
2791         hci_dev_lock(hdev);
2792
2793         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2794         if (!conn)
2795                 goto unlock;
2796
2797         if (status) {
2798                 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2799                                        conn->dst_type, status);
2800
2801                 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2802                         hdev->cur_adv_instance = conn->adv_instance;
2803                         hci_enable_advertising(hdev);
2804                 }
2805
2806                 /* Inform sockets conn is gone before we delete it */
2807                 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2808
2809                 goto done;
2810         }
2811
2812         mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2813
2814         if (conn->type == ACL_LINK) {
2815                 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2816                         hci_remove_link_key(hdev, &conn->dst);
2817         }
2818
2819         params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2820         if (params) {
2821                 switch (params->auto_connect) {
2822                 case HCI_AUTO_CONN_LINK_LOSS:
2823                         if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2824                                 break;
2825                         fallthrough;
2826
2827                 case HCI_AUTO_CONN_DIRECT:
2828                 case HCI_AUTO_CONN_ALWAYS:
2829                         hci_pend_le_list_del_init(params);
2830                         hci_pend_le_list_add(params, &hdev->pend_le_conns);
2831                         break;
2832
2833                 default:
2834                         break;
2835                 }
2836         }
2837
2838         mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2839                                  cp->reason, mgmt_conn);
2840
2841         hci_disconn_cfm(conn, cp->reason);
2842
2843 done:
2844         /* If the disconnection failed for any reason, the upper layer
2845          * does not retry to disconnect in current implementation.
2846          * Hence, we need to do some basic cleanup here and re-enable
2847          * advertising if necessary.
2848          */
2849         hci_conn_del(conn);
2850 unlock:
2851         hci_dev_unlock(hdev);
2852 }
2853
2854 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2855 {
2856         /* When using controller based address resolution, then the new
2857          * address types 0x02 and 0x03 are used. These types need to be
2858          * converted back into either public address or random address type
2859          */
2860         switch (type) {
2861         case ADDR_LE_DEV_PUBLIC_RESOLVED:
2862                 if (resolved)
2863                         *resolved = true;
2864                 return ADDR_LE_DEV_PUBLIC;
2865         case ADDR_LE_DEV_RANDOM_RESOLVED:
2866                 if (resolved)
2867                         *resolved = true;
2868                 return ADDR_LE_DEV_RANDOM;
2869         }
2870
2871         if (resolved)
2872                 *resolved = false;
2873         return type;
2874 }
2875
2876 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2877                               u8 peer_addr_type, u8 own_address_type,
2878                               u8 filter_policy)
2879 {
2880         struct hci_conn *conn;
2881
2882         conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2883                                        peer_addr_type);
2884         if (!conn)
2885                 return;
2886
2887         own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2888
2889         /* Store the initiator and responder address information which
2890          * is needed for SMP. These values will not change during the
2891          * lifetime of the connection.
2892          */
2893         conn->init_addr_type = own_address_type;
2894         if (own_address_type == ADDR_LE_DEV_RANDOM)
2895                 bacpy(&conn->init_addr, &hdev->random_addr);
2896         else
2897                 bacpy(&conn->init_addr, &hdev->bdaddr);
2898
2899         conn->resp_addr_type = peer_addr_type;
2900         bacpy(&conn->resp_addr, peer_addr);
2901 }
2902
2903 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2904 {
2905         struct hci_cp_le_create_conn *cp;
2906
2907         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2908
2909         /* All connection failure handling is taken care of by the
2910          * hci_conn_failed function which is triggered by the HCI
2911          * request completion callbacks used for connecting.
2912          */
2913         if (status)
2914                 return;
2915
2916         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2917         if (!cp)
2918                 return;
2919
2920         hci_dev_lock(hdev);
2921
2922         cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2923                           cp->own_address_type, cp->filter_policy);
2924
2925         hci_dev_unlock(hdev);
2926 }
2927
2928 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2929 {
2930         struct hci_cp_le_ext_create_conn *cp;
2931
2932         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2933
2934         /* All connection failure handling is taken care of by the
2935          * hci_conn_failed function which is triggered by the HCI
2936          * request completion callbacks used for connecting.
2937          */
2938         if (status)
2939                 return;
2940
2941         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2942         if (!cp)
2943                 return;
2944
2945         hci_dev_lock(hdev);
2946
2947         cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2948                           cp->own_addr_type, cp->filter_policy);
2949
2950         hci_dev_unlock(hdev);
2951 }
2952
2953 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2954 {
2955         struct hci_cp_le_read_remote_features *cp;
2956         struct hci_conn *conn;
2957
2958         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2959
2960         if (!status)
2961                 return;
2962
2963         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2964         if (!cp)
2965                 return;
2966
2967         hci_dev_lock(hdev);
2968
2969         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2970         if (conn) {
2971                 if (conn->state == BT_CONFIG) {
2972                         hci_connect_cfm(conn, status);
2973                         hci_conn_drop(conn);
2974                 }
2975         }
2976
2977         hci_dev_unlock(hdev);
2978 }
2979
2980 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2981 {
2982         struct hci_cp_le_start_enc *cp;
2983         struct hci_conn *conn;
2984
2985         bt_dev_dbg(hdev, "status 0x%2.2x", status);
2986
2987         if (!status)
2988                 return;
2989
2990         hci_dev_lock(hdev);
2991
2992         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2993         if (!cp)
2994                 goto unlock;
2995
2996         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2997         if (!conn)
2998                 goto unlock;
2999
3000         if (conn->state != BT_CONNECTED)
3001                 goto unlock;
3002
3003         hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3004         hci_conn_drop(conn);
3005
3006 unlock:
3007         hci_dev_unlock(hdev);
3008 }
3009
3010 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
3011 {
3012         struct hci_cp_switch_role *cp;
3013         struct hci_conn *conn;
3014
3015         BT_DBG("%s status 0x%2.2x", hdev->name, status);
3016
3017         if (!status)
3018                 return;
3019
3020         cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
3021         if (!cp)
3022                 return;
3023
3024         hci_dev_lock(hdev);
3025
3026         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
3027         if (conn)
3028                 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
3029
3030         hci_dev_unlock(hdev);
3031 }
3032
3033 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
3034                                      struct sk_buff *skb)
3035 {
3036         struct hci_ev_status *ev = data;
3037         struct discovery_state *discov = &hdev->discovery;
3038         struct inquiry_entry *e;
3039
3040         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3041
3042         hci_conn_check_pending(hdev);
3043
3044         if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
3045                 return;
3046
3047         smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
3048         wake_up_bit(&hdev->flags, HCI_INQUIRY);
3049
3050         if (!hci_dev_test_flag(hdev, HCI_MGMT))
3051                 return;
3052
3053         hci_dev_lock(hdev);
3054
3055         if (discov->state != DISCOVERY_FINDING)
3056                 goto unlock;
3057
3058         if (list_empty(&discov->resolve)) {
3059                 /* When BR/EDR inquiry is active and no LE scanning is in
3060                  * progress, then change discovery state to indicate completion.
3061                  *
3062                  * When running LE scanning and BR/EDR inquiry simultaneously
3063                  * and the LE scan already finished, then change the discovery
3064                  * state to indicate completion.
3065                  */
3066                 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3067                     !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3068                         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3069                 goto unlock;
3070         }
3071
3072         e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3073         if (e && hci_resolve_name(hdev, e) == 0) {
3074                 e->name_state = NAME_PENDING;
3075                 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3076                 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3077         } else {
3078                 /* When BR/EDR inquiry is active and no LE scanning is in
3079                  * progress, then change discovery state to indicate completion.
3080                  *
3081                  * When running LE scanning and BR/EDR inquiry simultaneously
3082                  * and the LE scan already finished, then change the discovery
3083                  * state to indicate completion.
3084                  */
3085                 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3086                     !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3087                         hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3088         }
3089
3090 unlock:
3091         hci_dev_unlock(hdev);
3092 }
3093
3094 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3095                                    struct sk_buff *skb)
3096 {
3097         struct hci_ev_inquiry_result *ev = edata;
3098         struct inquiry_data data;
3099         int i;
3100
3101         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3102                              flex_array_size(ev, info, ev->num)))
3103                 return;
3104
3105         bt_dev_dbg(hdev, "num %d", ev->num);
3106
3107         if (!ev->num)
3108                 return;
3109
3110         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3111                 return;
3112
3113         hci_dev_lock(hdev);
3114
3115         for (i = 0; i < ev->num; i++) {
3116                 struct inquiry_info *info = &ev->info[i];
3117                 u32 flags;
3118
3119                 bacpy(&data.bdaddr, &info->bdaddr);
3120                 data.pscan_rep_mode     = info->pscan_rep_mode;
3121                 data.pscan_period_mode  = info->pscan_period_mode;
3122                 data.pscan_mode         = info->pscan_mode;
3123                 memcpy(data.dev_class, info->dev_class, 3);
3124                 data.clock_offset       = info->clock_offset;
3125                 data.rssi               = HCI_RSSI_INVALID;
3126                 data.ssp_mode           = 0x00;
3127
3128                 flags = hci_inquiry_cache_update(hdev, &data, false);
3129
3130                 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3131                                   info->dev_class, HCI_RSSI_INVALID,
3132                                   flags, NULL, 0, NULL, 0, 0);
3133         }
3134
3135         hci_dev_unlock(hdev);
3136 }
3137
3138 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3139                                   struct sk_buff *skb)
3140 {
3141         struct hci_ev_conn_complete *ev = data;
3142         struct hci_conn *conn;
3143         u8 status = ev->status;
3144
3145         bt_dev_dbg(hdev, "status 0x%2.2x", status);
3146
3147         hci_dev_lock(hdev);
3148
3149         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3150         if (!conn) {
3151                 /* In case of error status and there is no connection pending
3152                  * just unlock as there is nothing to cleanup.
3153                  */
3154                 if (ev->status)
3155                         goto unlock;
3156
3157                 /* Connection may not exist if auto-connected. Check the bredr
3158                  * allowlist to see if this device is allowed to auto connect.
3159                  * If link is an ACL type, create a connection class
3160                  * automatically.
3161                  *
3162                  * Auto-connect will only occur if the event filter is
3163                  * programmed with a given address. Right now, event filter is
3164                  * only used during suspend.
3165                  */
3166                 if (ev->link_type == ACL_LINK &&
3167                     hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3168                                                       &ev->bdaddr,
3169                                                       BDADDR_BREDR)) {
3170                         conn = hci_conn_add_unset(hdev, ev->link_type,
3171                                                   &ev->bdaddr, HCI_ROLE_SLAVE);
3172                         if (!conn) {
3173                                 bt_dev_err(hdev, "no memory for new conn");
3174                                 goto unlock;
3175                         }
3176                 } else {
3177                         if (ev->link_type != SCO_LINK)
3178                                 goto unlock;
3179
3180                         conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3181                                                        &ev->bdaddr);
3182                         if (!conn)
3183                                 goto unlock;
3184
3185                         conn->type = SCO_LINK;
3186                 }
3187         }
3188
3189         /* The HCI_Connection_Complete event is only sent once per connection.
3190          * Processing it more than once per connection can corrupt kernel memory.
3191          *
3192          * As the connection handle is set here for the first time, it indicates
3193          * whether the connection is already set up.
3194          */
3195         if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3196                 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3197                 goto unlock;
3198         }
3199
3200         if (!status) {
3201                 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3202                 if (status)
3203                         goto done;
3204
3205                 if (conn->type == ACL_LINK) {
3206                         conn->state = BT_CONFIG;
3207                         hci_conn_hold(conn);
3208
3209                         if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3210                             !hci_find_link_key(hdev, &ev->bdaddr))
3211                                 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3212                         else
3213                                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3214                 } else
3215                         conn->state = BT_CONNECTED;
3216
3217                 hci_debugfs_create_conn(conn);
3218                 hci_conn_add_sysfs(conn);
3219
3220                 if (test_bit(HCI_AUTH, &hdev->flags))
3221                         set_bit(HCI_CONN_AUTH, &conn->flags);
3222
3223                 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3224                         set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3225
3226                 /* Get remote features */
3227                 if (conn->type == ACL_LINK) {
3228                         struct hci_cp_read_remote_features cp;
3229                         cp.handle = ev->handle;
3230                         hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3231                                      sizeof(cp), &cp);
3232
3233                         hci_update_scan(hdev);
3234                 }
3235
3236                 /* Set packet type for incoming connection */
3237                 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3238                         struct hci_cp_change_conn_ptype cp;
3239                         cp.handle = ev->handle;
3240                         cp.pkt_type = cpu_to_le16(conn->pkt_type);
3241                         hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3242                                      &cp);
3243                 }
3244         }
3245
3246         if (conn->type == ACL_LINK)
3247                 hci_sco_setup(conn, ev->status);
3248
3249 done:
3250         if (status) {
3251                 hci_conn_failed(conn, status);
3252         } else if (ev->link_type == SCO_LINK) {
3253                 switch (conn->setting & SCO_AIRMODE_MASK) {
3254                 case SCO_AIRMODE_CVSD:
3255                         if (hdev->notify)
3256                                 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3257                         break;
3258                 }
3259
3260                 hci_connect_cfm(conn, status);
3261         }
3262
3263 unlock:
3264         hci_dev_unlock(hdev);
3265
3266         hci_conn_check_pending(hdev);
3267 }
3268
3269 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3270 {
3271         struct hci_cp_reject_conn_req cp;
3272
3273         bacpy(&cp.bdaddr, bdaddr);
3274         cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3275         hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3276 }
3277
3278 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3279                                  struct sk_buff *skb)
3280 {
3281         struct hci_ev_conn_request *ev = data;
3282         int mask = hdev->link_mode;
3283         struct inquiry_entry *ie;
3284         struct hci_conn *conn;
3285         __u8 flags = 0;
3286
3287         bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3288
3289         /* Reject incoming connection from device with same BD ADDR against
3290          * CVE-2020-26555
3291          */
3292         if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3293                 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3294                            &ev->bdaddr);
3295                 hci_reject_conn(hdev, &ev->bdaddr);
3296                 return;
3297         }
3298
3299         mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3300                                       &flags);
3301
3302         if (!(mask & HCI_LM_ACCEPT)) {
3303                 hci_reject_conn(hdev, &ev->bdaddr);
3304                 return;
3305         }
3306
3307         hci_dev_lock(hdev);
3308
3309         if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3310                                    BDADDR_BREDR)) {
3311                 hci_reject_conn(hdev, &ev->bdaddr);
3312                 goto unlock;
3313         }
3314
3315         /* Require HCI_CONNECTABLE or an accept list entry to accept the
3316          * connection. These features are only touched through mgmt so
3317          * only do the checks if HCI_MGMT is set.
3318          */
3319         if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3320             !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3321             !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3322                                                BDADDR_BREDR)) {
3323                 hci_reject_conn(hdev, &ev->bdaddr);
3324                 goto unlock;
3325         }
3326
3327         /* Connection accepted */
3328
3329         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3330         if (ie)
3331                 memcpy(ie->data.dev_class, ev->dev_class, 3);
3332
3333         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3334                         &ev->bdaddr);
3335         if (!conn) {
3336                 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3337                                           HCI_ROLE_SLAVE);
3338                 if (!conn) {
3339                         bt_dev_err(hdev, "no memory for new connection");
3340                         goto unlock;
3341                 }
3342         }
3343
3344         memcpy(conn->dev_class, ev->dev_class, 3);
3345
3346         hci_dev_unlock(hdev);
3347
3348         if (ev->link_type == ACL_LINK ||
3349             (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3350                 struct hci_cp_accept_conn_req cp;
3351                 conn->state = BT_CONNECT;
3352
3353                 bacpy(&cp.bdaddr, &ev->bdaddr);
3354
3355                 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3356                         cp.role = 0x00; /* Become central */
3357                 else
3358                         cp.role = 0x01; /* Remain peripheral */
3359
3360                 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3361         } else if (!(flags & HCI_PROTO_DEFER)) {
3362                 struct hci_cp_accept_sync_conn_req cp;
3363                 conn->state = BT_CONNECT;
3364
3365                 bacpy(&cp.bdaddr, &ev->bdaddr);
3366                 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3367
3368                 cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
3369                 cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
3370                 cp.max_latency    = cpu_to_le16(0xffff);
3371                 cp.content_format = cpu_to_le16(hdev->voice_setting);
3372                 cp.retrans_effort = 0xff;
3373
3374                 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3375                              &cp);
3376         } else {
3377                 conn->state = BT_CONNECT2;
3378                 hci_connect_cfm(conn, 0);
3379         }
3380
3381         return;
3382 unlock:
3383         hci_dev_unlock(hdev);
3384 }
3385
3386 static u8 hci_to_mgmt_reason(u8 err)
3387 {
3388         switch (err) {
3389         case HCI_ERROR_CONNECTION_TIMEOUT:
3390                 return MGMT_DEV_DISCONN_TIMEOUT;
3391         case HCI_ERROR_REMOTE_USER_TERM:
3392         case HCI_ERROR_REMOTE_LOW_RESOURCES:
3393         case HCI_ERROR_REMOTE_POWER_OFF:
3394                 return MGMT_DEV_DISCONN_REMOTE;
3395         case HCI_ERROR_LOCAL_HOST_TERM:
3396                 return MGMT_DEV_DISCONN_LOCAL_HOST;
3397         default:
3398                 return MGMT_DEV_DISCONN_UNKNOWN;
3399         }
3400 }
3401
3402 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3403                                      struct sk_buff *skb)
3404 {
3405         struct hci_ev_disconn_complete *ev = data;
3406         u8 reason;
3407         struct hci_conn_params *params;
3408         struct hci_conn *conn;
3409         bool mgmt_connected;
3410
3411         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3412
3413         hci_dev_lock(hdev);
3414
3415         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3416         if (!conn)
3417                 goto unlock;
3418
3419         if (ev->status) {
3420                 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3421                                        conn->dst_type, ev->status);
3422                 goto unlock;
3423         }
3424
3425         conn->state = BT_CLOSED;
3426
3427         mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3428
3429         if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3430                 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3431         else
3432                 reason = hci_to_mgmt_reason(ev->reason);
3433
3434         mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3435                                 reason, mgmt_connected);
3436
3437         if (conn->type == ACL_LINK) {
3438                 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3439                         hci_remove_link_key(hdev, &conn->dst);
3440
3441                 hci_update_scan(hdev);
3442         }
3443
3444         params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
3445         if (params) {
3446                 switch (params->auto_connect) {
3447                 case HCI_AUTO_CONN_LINK_LOSS:
3448                         if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3449                                 break;
3450                         fallthrough;
3451
3452                 case HCI_AUTO_CONN_DIRECT:
3453                 case HCI_AUTO_CONN_ALWAYS:
3454                         hci_pend_le_list_del_init(params);
3455                         hci_pend_le_list_add(params, &hdev->pend_le_conns);
3456                         hci_update_passive_scan(hdev);
3457                         break;
3458
3459                 default:
3460                         break;
3461                 }
3462         }
3463
3464         hci_disconn_cfm(conn, ev->reason);
3465
3466         /* Re-enable advertising if necessary, since it might
3467          * have been disabled by the connection. From the
3468          * HCI_LE_Set_Advertise_Enable command description in
3469          * the core specification (v4.0):
3470          * "The Controller shall continue advertising until the Host
3471          * issues an LE_Set_Advertise_Enable command with
3472          * Advertising_Enable set to 0x00 (Advertising is disabled)
3473          * or until a connection is created or until the Advertising
3474          * is timed out due to Directed Advertising."
3475          */
3476         if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3477                 hdev->cur_adv_instance = conn->adv_instance;
3478                 hci_enable_advertising(hdev);
3479         }
3480
3481         hci_conn_del(conn);
3482
3483 unlock:
3484         hci_dev_unlock(hdev);
3485 }
3486
3487 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3488                                   struct sk_buff *skb)
3489 {
3490         struct hci_ev_auth_complete *ev = data;
3491         struct hci_conn *conn;
3492
3493         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3494
3495         hci_dev_lock(hdev);
3496
3497         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3498         if (!conn)
3499                 goto unlock;
3500
3501         if (!ev->status) {
3502                 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3503                 set_bit(HCI_CONN_AUTH, &conn->flags);
3504                 conn->sec_level = conn->pending_sec_level;
3505         } else {
3506                 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3507                         set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3508
3509                 mgmt_auth_failed(conn, ev->status);
3510         }
3511
3512         clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3513
3514         if (conn->state == BT_CONFIG) {
3515                 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3516                         struct hci_cp_set_conn_encrypt cp;
3517                         cp.handle  = ev->handle;
3518                         cp.encrypt = 0x01;
3519                         hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3520                                      &cp);
3521                 } else {
3522                         conn->state = BT_CONNECTED;
3523                         hci_connect_cfm(conn, ev->status);
3524                         hci_conn_drop(conn);
3525                 }
3526         } else {
3527                 hci_auth_cfm(conn, ev->status);
3528
3529                 hci_conn_hold(conn);
3530                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3531                 hci_conn_drop(conn);
3532         }
3533
3534         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3535                 if (!ev->status) {
3536                         struct hci_cp_set_conn_encrypt cp;
3537                         cp.handle  = ev->handle;
3538                         cp.encrypt = 0x01;
3539                         hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3540                                      &cp);
3541                 } else {
3542                         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3543                         hci_encrypt_cfm(conn, ev->status);
3544                 }
3545         }
3546
3547 unlock:
3548         hci_dev_unlock(hdev);
3549 }
3550
3551 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3552                                 struct sk_buff *skb)
3553 {
3554         struct hci_ev_remote_name *ev = data;
3555         struct hci_conn *conn;
3556
3557         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3558
3559         hci_conn_check_pending(hdev);
3560
3561         hci_dev_lock(hdev);
3562
3563         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3564
3565         if (!hci_dev_test_flag(hdev, HCI_MGMT))
3566                 goto check_auth;
3567
3568         if (ev->status == 0)
3569                 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3570                                        strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3571         else
3572                 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3573
3574 check_auth:
3575         if (!conn)
3576                 goto unlock;
3577
3578         if (!hci_outgoing_auth_needed(hdev, conn))
3579                 goto unlock;
3580
3581         if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3582                 struct hci_cp_auth_requested cp;
3583
3584                 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3585
3586                 cp.handle = __cpu_to_le16(conn->handle);
3587                 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3588         }
3589
3590 unlock:
3591         hci_dev_unlock(hdev);
3592 }
3593
3594 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3595                                    struct sk_buff *skb)
3596 {
3597         struct hci_ev_encrypt_change *ev = data;
3598         struct hci_conn *conn;
3599
3600         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3601
3602         hci_dev_lock(hdev);
3603
3604         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3605         if (!conn)
3606                 goto unlock;
3607
3608         if (!ev->status) {
3609                 if (ev->encrypt) {
3610                         /* Encryption implies authentication */
3611                         set_bit(HCI_CONN_AUTH, &conn->flags);
3612                         set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3613                         conn->sec_level = conn->pending_sec_level;
3614
3615                         /* P-256 authentication key implies FIPS */
3616                         if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3617                                 set_bit(HCI_CONN_FIPS, &conn->flags);
3618
3619                         if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3620                             conn->type == LE_LINK)
3621                                 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3622                 } else {
3623                         clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3624                         clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3625                 }
3626         }
3627
3628         /* We should disregard the current RPA and generate a new one
3629          * whenever the encryption procedure fails.
3630          */
3631         if (ev->status && conn->type == LE_LINK) {
3632                 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3633                 hci_adv_instances_set_rpa_expired(hdev, true);
3634         }
3635
3636         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3637
3638         /* Check link security requirements are met */
3639         if (!hci_conn_check_link_mode(conn))
3640                 ev->status = HCI_ERROR_AUTH_FAILURE;
3641
3642         if (ev->status && conn->state == BT_CONNECTED) {
3643                 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3644                         set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3645
3646                 /* Notify upper layers so they can cleanup before
3647                  * disconnecting.
3648                  */
3649                 hci_encrypt_cfm(conn, ev->status);
3650                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3651                 hci_conn_drop(conn);
3652                 goto unlock;
3653         }
3654
3655         /* Try reading the encryption key size for encrypted ACL links */
3656         if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3657                 struct hci_cp_read_enc_key_size cp;
3658
3659                 /* Only send HCI_Read_Encryption_Key_Size if the
3660                  * controller really supports it. If it doesn't, assume
3661                  * the default size (16).
3662                  */
3663                 if (!(hdev->commands[20] & 0x10)) {
3664                         conn->enc_key_size = HCI_LINK_KEY_SIZE;
3665                         goto notify;
3666                 }
3667
3668                 cp.handle = cpu_to_le16(conn->handle);
3669                 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3670                                  sizeof(cp), &cp)) {
3671                         bt_dev_err(hdev, "sending read key size failed");
3672                         conn->enc_key_size = HCI_LINK_KEY_SIZE;
3673                         goto notify;
3674                 }
3675
3676                 goto unlock;
3677         }
3678
3679         /* Set the default Authenticated Payload Timeout after
3680          * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3681          * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3682          * sent when the link is active and Encryption is enabled, the conn
3683          * type can be either LE or ACL and controller must support LMP Ping.
3684          * Ensure for AES-CCM encryption as well.
3685          */
3686         if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3687             test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3688             ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3689              (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3690                 struct hci_cp_write_auth_payload_to cp;
3691
3692                 cp.handle = cpu_to_le16(conn->handle);
3693                 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3694                 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3695                                  sizeof(cp), &cp))
3696                         bt_dev_err(hdev, "write auth payload timeout failed");
3697         }
3698
3699 notify:
3700         hci_encrypt_cfm(conn, ev->status);
3701
3702 unlock:
3703         hci_dev_unlock(hdev);
3704 }
3705
3706 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3707                                              struct sk_buff *skb)
3708 {
3709         struct hci_ev_change_link_key_complete *ev = data;
3710         struct hci_conn *conn;
3711
3712         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3713
3714         hci_dev_lock(hdev);
3715
3716         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3717         if (conn) {
3718                 if (!ev->status)
3719                         set_bit(HCI_CONN_SECURE, &conn->flags);
3720
3721                 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3722
3723                 hci_key_change_cfm(conn, ev->status);
3724         }
3725
3726         hci_dev_unlock(hdev);
3727 }
3728
3729 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3730                                     struct sk_buff *skb)
3731 {
3732         struct hci_ev_remote_features *ev = data;
3733         struct hci_conn *conn;
3734
3735         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3736
3737         hci_dev_lock(hdev);
3738
3739         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3740         if (!conn)
3741                 goto unlock;
3742
3743         if (!ev->status)
3744                 memcpy(conn->features[0], ev->features, 8);
3745
3746         if (conn->state != BT_CONFIG)
3747                 goto unlock;
3748
3749         if (!ev->status && lmp_ext_feat_capable(hdev) &&
3750             lmp_ext_feat_capable(conn)) {
3751                 struct hci_cp_read_remote_ext_features cp;
3752                 cp.handle = ev->handle;
3753                 cp.page = 0x01;
3754                 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3755                              sizeof(cp), &cp);
3756                 goto unlock;
3757         }
3758
3759         if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
3760                 struct hci_cp_remote_name_req cp;
3761                 memset(&cp, 0, sizeof(cp));
3762                 bacpy(&cp.bdaddr, &conn->dst);
3763                 cp.pscan_rep_mode = 0x02;
3764                 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3765         } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
3766                 mgmt_device_connected(hdev, conn, NULL, 0);
3767
3768         if (!hci_outgoing_auth_needed(hdev, conn)) {
3769                 conn->state = BT_CONNECTED;
3770                 hci_connect_cfm(conn, ev->status);
3771                 hci_conn_drop(conn);
3772         }
3773
3774 unlock:
3775         hci_dev_unlock(hdev);
3776 }
3777
3778 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3779 {
3780         cancel_delayed_work(&hdev->cmd_timer);
3781
3782         rcu_read_lock();
3783         if (!test_bit(HCI_RESET, &hdev->flags)) {
3784                 if (ncmd) {
3785                         cancel_delayed_work(&hdev->ncmd_timer);
3786                         atomic_set(&hdev->cmd_cnt, 1);
3787                 } else {
3788                         if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3789                                 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3790                                                    HCI_NCMD_TIMEOUT);
3791                 }
3792         }
3793         rcu_read_unlock();
3794 }
3795
3796 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3797                                         struct sk_buff *skb)
3798 {
3799         struct hci_rp_le_read_buffer_size_v2 *rp = data;
3800
3801         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3802
3803         if (rp->status)
3804                 return rp->status;
3805
3806         hdev->le_mtu   = __le16_to_cpu(rp->acl_mtu);
3807         hdev->le_pkts  = rp->acl_max_pkt;
3808         hdev->iso_mtu  = __le16_to_cpu(rp->iso_mtu);
3809         hdev->iso_pkts = rp->iso_max_pkt;
3810
3811         hdev->le_cnt  = hdev->le_pkts;
3812         hdev->iso_cnt = hdev->iso_pkts;
3813
3814         BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3815                hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3816
3817         return rp->status;
3818 }
3819
3820 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3821 {
3822         struct hci_conn *conn, *tmp;
3823
3824         lockdep_assert_held(&hdev->lock);
3825
3826         list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3827                 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3828                     conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3829                         continue;
3830
3831                 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3832                         hci_conn_failed(conn, status);
3833         }
3834 }
3835
3836 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3837                                    struct sk_buff *skb)
3838 {
3839         struct hci_rp_le_set_cig_params *rp = data;
3840         struct hci_cp_le_set_cig_params *cp;
3841         struct hci_conn *conn;
3842         u8 status = rp->status;
3843         bool pending = false;
3844         int i;
3845
3846         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3847
3848         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3849         if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3850                             rp->cig_id != cp->cig_id)) {
3851                 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3852                 status = HCI_ERROR_UNSPECIFIED;
3853         }
3854
3855         hci_dev_lock(hdev);
3856
3857         /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3858          *
3859          * If the Status return parameter is non-zero, then the state of the CIG
3860          * and its CIS configurations shall not be changed by the command. If
3861          * the CIG did not already exist, it shall not be created.
3862          */
3863         if (status) {
3864                 /* Keep current configuration, fail only the unbound CIS */
3865                 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3866                 goto unlock;
3867         }
3868
3869         /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3870          *
3871          * If the Status return parameter is zero, then the Controller shall
3872          * set the Connection_Handle arrayed return parameter to the connection
3873          * handle(s) corresponding to the CIS configurations specified in
3874          * the CIS_IDs command parameter, in the same order.
3875          */
3876         for (i = 0; i < rp->num_handles; ++i) {
3877                 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3878                                                 cp->cis[i].cis_id);
3879                 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3880                         continue;
3881
3882                 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3883                         continue;
3884
3885                 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3886                         continue;
3887
3888                 if (conn->state == BT_CONNECT)
3889                         pending = true;
3890         }
3891
3892 unlock:
3893         if (pending)
3894                 hci_le_create_cis_pending(hdev);
3895
3896         hci_dev_unlock(hdev);
3897
3898         return rp->status;
3899 }
3900
3901 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3902                                    struct sk_buff *skb)
3903 {
3904         struct hci_rp_le_setup_iso_path *rp = data;
3905         struct hci_cp_le_setup_iso_path *cp;
3906         struct hci_conn *conn;
3907
3908         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3909
3910         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3911         if (!cp)
3912                 return rp->status;
3913
3914         hci_dev_lock(hdev);
3915
3916         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3917         if (!conn)
3918                 goto unlock;
3919
3920         if (rp->status) {
3921                 hci_connect_cfm(conn, rp->status);
3922                 hci_conn_del(conn);
3923                 goto unlock;
3924         }
3925
3926         switch (cp->direction) {
3927         /* Input (Host to Controller) */
3928         case 0x00:
3929                 /* Only confirm connection if output only */
3930                 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3931                         hci_connect_cfm(conn, rp->status);
3932                 break;
3933         /* Output (Controller to Host) */
3934         case 0x01:
3935                 /* Confirm connection since conn->iso_qos is always configured
3936                  * last.
3937                  */
3938                 hci_connect_cfm(conn, rp->status);
3939                 break;
3940         }
3941
3942 unlock:
3943         hci_dev_unlock(hdev);
3944         return rp->status;
3945 }
3946
3947 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3948 {
3949         bt_dev_dbg(hdev, "status 0x%2.2x", status);
3950 }
3951
3952 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3953                                    struct sk_buff *skb)
3954 {
3955         struct hci_ev_status *rp = data;
3956         struct hci_cp_le_set_per_adv_params *cp;
3957
3958         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3959
3960         if (rp->status)
3961                 return rp->status;
3962
3963         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3964         if (!cp)
3965                 return rp->status;
3966
3967         /* TODO: set the conn state */
3968         return rp->status;
3969 }
3970
3971 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3972                                        struct sk_buff *skb)
3973 {
3974         struct hci_ev_status *rp = data;
3975         struct hci_cp_le_set_per_adv_enable *cp;
3976         struct adv_info *adv = NULL, *n;
3977         u8 per_adv_cnt = 0;
3978
3979         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3980
3981         if (rp->status)
3982                 return rp->status;
3983
3984         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3985         if (!cp)
3986                 return rp->status;
3987
3988         hci_dev_lock(hdev);
3989
3990         adv = hci_find_adv_instance(hdev, cp->handle);
3991
3992         if (cp->enable) {
3993                 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3994
3995                 if (adv)
3996                         adv->enabled = true;
3997         } else {
3998                 /* If just one instance was disabled check if there are
3999                  * any other instance enabled before clearing HCI_LE_PER_ADV.
4000                  * The current periodic adv instance will be marked as
4001                  * disabled once extended advertising is also disabled.
4002                  */
4003                 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
4004                                          list) {
4005                         if (adv->periodic && adv->enabled)
4006                                 per_adv_cnt++;
4007                 }
4008
4009                 if (per_adv_cnt > 1)
4010                         goto unlock;
4011
4012                 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
4013         }
4014
4015 unlock:
4016         hci_dev_unlock(hdev);
4017
4018         return rp->status;
4019 }
4020
4021 #define HCI_CC_VL(_op, _func, _min, _max) \
4022 { \
4023         .op = _op, \
4024         .func = _func, \
4025         .min_len = _min, \
4026         .max_len = _max, \
4027 }
4028
4029 #define HCI_CC(_op, _func, _len) \
4030         HCI_CC_VL(_op, _func, _len, _len)
4031
4032 #define HCI_CC_STATUS(_op, _func) \
4033         HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4034
4035 static const struct hci_cc {
4036         u16  op;
4037         u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4038         u16  min_len;
4039         u16  max_len;
4040 } hci_cc_table[] = {
4041         HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4042         HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4043         HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4044         HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4045                       hci_cc_remote_name_req_cancel),
4046         HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4047                sizeof(struct hci_rp_role_discovery)),
4048         HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4049                sizeof(struct hci_rp_read_link_policy)),
4050         HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4051                sizeof(struct hci_rp_write_link_policy)),
4052         HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4053                sizeof(struct hci_rp_read_def_link_policy)),
4054         HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4055                       hci_cc_write_def_link_policy),
4056         HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4057         HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4058                sizeof(struct hci_rp_read_stored_link_key)),
4059         HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4060                sizeof(struct hci_rp_delete_stored_link_key)),
4061         HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4062         HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4063                sizeof(struct hci_rp_read_local_name)),
4064         HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4065         HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4066         HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4067         HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4068         HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4069                sizeof(struct hci_rp_read_class_of_dev)),
4070         HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4071         HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4072                sizeof(struct hci_rp_read_voice_setting)),
4073         HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4074         HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4075                sizeof(struct hci_rp_read_num_supported_iac)),
4076         HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4077         HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4078         HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4079                sizeof(struct hci_rp_read_auth_payload_to)),
4080         HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4081                sizeof(struct hci_rp_write_auth_payload_to)),
4082         HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4083                sizeof(struct hci_rp_read_local_version)),
4084         HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4085                sizeof(struct hci_rp_read_local_commands)),
4086         HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4087                sizeof(struct hci_rp_read_local_features)),
4088         HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4089                sizeof(struct hci_rp_read_local_ext_features)),
4090         HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4091                sizeof(struct hci_rp_read_buffer_size)),
4092         HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4093                sizeof(struct hci_rp_read_bd_addr)),
4094         HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4095                sizeof(struct hci_rp_read_local_pairing_opts)),
4096         HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4097                sizeof(struct hci_rp_read_page_scan_activity)),
4098         HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4099                       hci_cc_write_page_scan_activity),
4100         HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4101                sizeof(struct hci_rp_read_page_scan_type)),
4102         HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4103         HCI_CC(HCI_OP_READ_DATA_BLOCK_SIZE, hci_cc_read_data_block_size,
4104                sizeof(struct hci_rp_read_data_block_size)),
4105         HCI_CC(HCI_OP_READ_FLOW_CONTROL_MODE, hci_cc_read_flow_control_mode,
4106                sizeof(struct hci_rp_read_flow_control_mode)),
4107         HCI_CC(HCI_OP_READ_LOCAL_AMP_INFO, hci_cc_read_local_amp_info,
4108                sizeof(struct hci_rp_read_local_amp_info)),
4109         HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4110                sizeof(struct hci_rp_read_clock)),
4111         HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4112                sizeof(struct hci_rp_read_enc_key_size)),
4113         HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4114                sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4115         HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4116                hci_cc_read_def_err_data_reporting,
4117                sizeof(struct hci_rp_read_def_err_data_reporting)),
4118         HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4119                       hci_cc_write_def_err_data_reporting),
4120         HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4121                sizeof(struct hci_rp_pin_code_reply)),
4122         HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4123                sizeof(struct hci_rp_pin_code_neg_reply)),
4124         HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4125                sizeof(struct hci_rp_read_local_oob_data)),
4126         HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4127                sizeof(struct hci_rp_read_local_oob_ext_data)),
4128         HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4129                sizeof(struct hci_rp_le_read_buffer_size)),
4130         HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4131                sizeof(struct hci_rp_le_read_local_features)),
4132         HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4133                sizeof(struct hci_rp_le_read_adv_tx_power)),
4134         HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4135                sizeof(struct hci_rp_user_confirm_reply)),
4136         HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4137                sizeof(struct hci_rp_user_confirm_reply)),
4138         HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4139                sizeof(struct hci_rp_user_confirm_reply)),
4140         HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4141                sizeof(struct hci_rp_user_confirm_reply)),
4142         HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4143         HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4144         HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4145         HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4146         HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4147                hci_cc_le_read_accept_list_size,
4148                sizeof(struct hci_rp_le_read_accept_list_size)),
4149         HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4150         HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4151                       hci_cc_le_add_to_accept_list),
4152         HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4153                       hci_cc_le_del_from_accept_list),
4154         HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4155                sizeof(struct hci_rp_le_read_supported_states)),
4156         HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4157                sizeof(struct hci_rp_le_read_def_data_len)),
4158         HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4159                       hci_cc_le_write_def_data_len),
4160         HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4161                       hci_cc_le_add_to_resolv_list),
4162         HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4163                       hci_cc_le_del_from_resolv_list),
4164         HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4165                       hci_cc_le_clear_resolv_list),
4166         HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4167                sizeof(struct hci_rp_le_read_resolv_list_size)),
4168         HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4169                       hci_cc_le_set_addr_resolution_enable),
4170         HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4171                sizeof(struct hci_rp_le_read_max_data_len)),
4172         HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4173                       hci_cc_write_le_host_supported),
4174         HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4175         HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4176                sizeof(struct hci_rp_read_rssi)),
4177         HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4178                sizeof(struct hci_rp_read_tx_power)),
4179         HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4180         HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4181                       hci_cc_le_set_ext_scan_param),
4182         HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4183                       hci_cc_le_set_ext_scan_enable),
4184         HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4185         HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4186                hci_cc_le_read_num_adv_sets,
4187                sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4188         HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4189                sizeof(struct hci_rp_le_set_ext_adv_params)),
4190         HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4191                       hci_cc_le_set_ext_adv_enable),
4192         HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4193                       hci_cc_le_set_adv_set_random_addr),
4194         HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4195         HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4196         HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4197         HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4198                       hci_cc_le_set_per_adv_enable),
4199         HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4200                sizeof(struct hci_rp_le_read_transmit_power)),
4201         HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4202         HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4203                sizeof(struct hci_rp_le_read_buffer_size_v2)),
4204         HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4205                   sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4206         HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4207                sizeof(struct hci_rp_le_setup_iso_path)),
4208 };
4209
4210 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4211                       struct sk_buff *skb)
4212 {
4213         void *data;
4214
4215         if (skb->len < cc->min_len) {
4216                 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4217                            cc->op, skb->len, cc->min_len);
4218                 return HCI_ERROR_UNSPECIFIED;
4219         }
4220
4221         /* Just warn if the length is over max_len size it still be possible to
4222          * partially parse the cc so leave to callback to decide if that is
4223          * acceptable.
4224          */
4225         if (skb->len > cc->max_len)
4226                 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4227                             cc->op, skb->len, cc->max_len);
4228
4229         data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4230         if (!data)
4231                 return HCI_ERROR_UNSPECIFIED;
4232
4233         return cc->func(hdev, data, skb);
4234 }
4235
4236 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4237                                  struct sk_buff *skb, u16 *opcode, u8 *status,
4238                                  hci_req_complete_t *req_complete,
4239                                  hci_req_complete_skb_t *req_complete_skb)
4240 {
4241         struct hci_ev_cmd_complete *ev = data;
4242         int i;
4243
4244         *opcode = __le16_to_cpu(ev->opcode);
4245
4246         bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4247
4248         for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4249                 if (hci_cc_table[i].op == *opcode) {
4250                         *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4251                         break;
4252                 }
4253         }
4254
4255         if (i == ARRAY_SIZE(hci_cc_table)) {
4256                 /* Unknown opcode, assume byte 0 contains the status, so
4257                  * that e.g. __hci_cmd_sync() properly returns errors
4258                  * for vendor specific commands send by HCI drivers.
4259                  * If a vendor doesn't actually follow this convention we may
4260                  * need to introduce a vendor CC table in order to properly set
4261                  * the status.
4262                  */
4263                 *status = skb->data[0];
4264         }
4265
4266         handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4267
4268         hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4269                              req_complete_skb);
4270
4271         if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4272                 bt_dev_err(hdev,
4273                            "unexpected event for opcode 0x%4.4x", *opcode);
4274                 return;
4275         }
4276
4277         if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4278                 queue_work(hdev->workqueue, &hdev->cmd_work);
4279 }
4280
4281 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4282 {
4283         struct hci_cp_le_create_cis *cp;
4284         bool pending = false;
4285         int i;
4286
4287         bt_dev_dbg(hdev, "status 0x%2.2x", status);
4288
4289         if (!status)
4290                 return;
4291
4292         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4293         if (!cp)
4294                 return;
4295
4296         hci_dev_lock(hdev);
4297
4298         /* Remove connection if command failed */
4299         for (i = 0; cp->num_cis; cp->num_cis--, i++) {
4300                 struct hci_conn *conn;
4301                 u16 handle;
4302
4303                 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4304
4305                 conn = hci_conn_hash_lookup_handle(hdev, handle);
4306                 if (conn) {
4307                         if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4308                                                &conn->flags))
4309                                 pending = true;
4310                         conn->state = BT_CLOSED;
4311                         hci_connect_cfm(conn, status);
4312                         hci_conn_del(conn);
4313                 }
4314         }
4315
4316         if (pending)
4317                 hci_le_create_cis_pending(hdev);
4318
4319         hci_dev_unlock(hdev);
4320 }
4321
4322 #define HCI_CS(_op, _func) \
4323 { \
4324         .op = _op, \
4325         .func = _func, \
4326 }
4327
4328 static const struct hci_cs {
4329         u16  op;
4330         void (*func)(struct hci_dev *hdev, __u8 status);
4331 } hci_cs_table[] = {
4332         HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4333         HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4334         HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4335         HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4336         HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4337         HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4338         HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4339         HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4340         HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4341                hci_cs_read_remote_ext_features),
4342         HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4343         HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4344                hci_cs_enhanced_setup_sync_conn),
4345         HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4346         HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4347         HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4348         HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4349         HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4350         HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4351         HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4352         HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4353         HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4354 };
4355
4356 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4357                                struct sk_buff *skb, u16 *opcode, u8 *status,
4358                                hci_req_complete_t *req_complete,
4359                                hci_req_complete_skb_t *req_complete_skb)
4360 {
4361         struct hci_ev_cmd_status *ev = data;
4362         int i;
4363
4364         *opcode = __le16_to_cpu(ev->opcode);
4365         *status = ev->status;
4366
4367         bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4368
4369         for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4370                 if (hci_cs_table[i].op == *opcode) {
4371                         hci_cs_table[i].func(hdev, ev->status);
4372                         break;
4373                 }
4374         }
4375
4376         handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4377
4378         /* Indicate request completion if the command failed. Also, if
4379          * we're not waiting for a special event and we get a success
4380          * command status we should try to flag the request as completed
4381          * (since for this kind of commands there will not be a command
4382          * complete event).
4383          */
4384         if (ev->status || (hdev->sent_cmd && !hci_skb_event(hdev->sent_cmd))) {
4385                 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4386                                      req_complete_skb);
4387                 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4388                         bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4389                                    *opcode);
4390                         return;
4391                 }
4392         }
4393
4394         if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4395                 queue_work(hdev->workqueue, &hdev->cmd_work);
4396 }
4397
4398 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4399                                    struct sk_buff *skb)
4400 {
4401         struct hci_ev_hardware_error *ev = data;
4402
4403         bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4404
4405         hdev->hw_error_code = ev->code;
4406
4407         queue_work(hdev->req_workqueue, &hdev->error_reset);
4408 }
4409
4410 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4411                                 struct sk_buff *skb)
4412 {
4413         struct hci_ev_role_change *ev = data;
4414         struct hci_conn *conn;
4415
4416         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4417
4418         hci_dev_lock(hdev);
4419
4420         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4421         if (conn) {
4422                 if (!ev->status)
4423                         conn->role = ev->role;
4424
4425                 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4426
4427                 hci_role_switch_cfm(conn, ev->status, ev->role);
4428         }
4429
4430         hci_dev_unlock(hdev);
4431 }
4432
4433 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4434                                   struct sk_buff *skb)
4435 {
4436         struct hci_ev_num_comp_pkts *ev = data;
4437         int i;
4438
4439         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4440                              flex_array_size(ev, handles, ev->num)))
4441                 return;
4442
4443         if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_PACKET_BASED) {
4444                 bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode);
4445                 return;
4446         }
4447
4448         bt_dev_dbg(hdev, "num %d", ev->num);
4449
4450         for (i = 0; i < ev->num; i++) {
4451                 struct hci_comp_pkts_info *info = &ev->handles[i];
4452                 struct hci_conn *conn;
4453                 __u16  handle, count;
4454
4455                 handle = __le16_to_cpu(info->handle);
4456                 count  = __le16_to_cpu(info->count);
4457
4458                 conn = hci_conn_hash_lookup_handle(hdev, handle);
4459                 if (!conn)
4460                         continue;
4461
4462                 conn->sent -= count;
4463
4464                 switch (conn->type) {
4465                 case ACL_LINK:
4466                         hdev->acl_cnt += count;
4467                         if (hdev->acl_cnt > hdev->acl_pkts)
4468                                 hdev->acl_cnt = hdev->acl_pkts;
4469                         break;
4470
4471                 case LE_LINK:
4472                         if (hdev->le_pkts) {
4473                                 hdev->le_cnt += count;
4474                                 if (hdev->le_cnt > hdev->le_pkts)
4475                                         hdev->le_cnt = hdev->le_pkts;
4476                         } else {
4477                                 hdev->acl_cnt += count;
4478                                 if (hdev->acl_cnt > hdev->acl_pkts)
4479                                         hdev->acl_cnt = hdev->acl_pkts;
4480                         }
4481                         break;
4482
4483                 case SCO_LINK:
4484                         hdev->sco_cnt += count;
4485                         if (hdev->sco_cnt > hdev->sco_pkts)
4486                                 hdev->sco_cnt = hdev->sco_pkts;
4487                         break;
4488
4489                 case ISO_LINK:
4490                         if (hdev->iso_pkts) {
4491                                 hdev->iso_cnt += count;
4492                                 if (hdev->iso_cnt > hdev->iso_pkts)
4493                                         hdev->iso_cnt = hdev->iso_pkts;
4494                         } else if (hdev->le_pkts) {
4495                                 hdev->le_cnt += count;
4496                                 if (hdev->le_cnt > hdev->le_pkts)
4497                                         hdev->le_cnt = hdev->le_pkts;
4498                         } else {
4499                                 hdev->acl_cnt += count;
4500                                 if (hdev->acl_cnt > hdev->acl_pkts)
4501                                         hdev->acl_cnt = hdev->acl_pkts;
4502                         }
4503                         break;
4504
4505                 default:
4506                         bt_dev_err(hdev, "unknown type %d conn %p",
4507                                    conn->type, conn);
4508                         break;
4509                 }
4510         }
4511
4512         queue_work(hdev->workqueue, &hdev->tx_work);
4513 }
4514
4515 static struct hci_conn *__hci_conn_lookup_handle(struct hci_dev *hdev,
4516                                                  __u16 handle)
4517 {
4518         struct hci_chan *chan;
4519
4520         switch (hdev->dev_type) {
4521         case HCI_PRIMARY:
4522                 return hci_conn_hash_lookup_handle(hdev, handle);
4523         case HCI_AMP:
4524                 chan = hci_chan_lookup_handle(hdev, handle);
4525                 if (chan)
4526                         return chan->conn;
4527                 break;
4528         default:
4529                 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
4530                 break;
4531         }
4532
4533         return NULL;
4534 }
4535
4536 static void hci_num_comp_blocks_evt(struct hci_dev *hdev, void *data,
4537                                     struct sk_buff *skb)
4538 {
4539         struct hci_ev_num_comp_blocks *ev = data;
4540         int i;
4541
4542         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_BLOCKS,
4543                              flex_array_size(ev, handles, ev->num_hndl)))
4544                 return;
4545
4546         if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_BLOCK_BASED) {
4547                 bt_dev_err(hdev, "wrong event for mode %d",
4548                            hdev->flow_ctl_mode);
4549                 return;
4550         }
4551
4552         bt_dev_dbg(hdev, "num_blocks %d num_hndl %d", ev->num_blocks,
4553                    ev->num_hndl);
4554
4555         for (i = 0; i < ev->num_hndl; i++) {
4556                 struct hci_comp_blocks_info *info = &ev->handles[i];
4557                 struct hci_conn *conn = NULL;
4558                 __u16  handle, block_count;
4559
4560                 handle = __le16_to_cpu(info->handle);
4561                 block_count = __le16_to_cpu(info->blocks);
4562
4563                 conn = __hci_conn_lookup_handle(hdev, handle);
4564                 if (!conn)
4565                         continue;
4566
4567                 conn->sent -= block_count;
4568
4569                 switch (conn->type) {
4570                 case ACL_LINK:
4571                 case AMP_LINK:
4572                         hdev->block_cnt += block_count;
4573                         if (hdev->block_cnt > hdev->num_blocks)
4574                                 hdev->block_cnt = hdev->num_blocks;
4575                         break;
4576
4577                 default:
4578                         bt_dev_err(hdev, "unknown type %d conn %p",
4579                                    conn->type, conn);
4580                         break;
4581                 }
4582         }
4583
4584         queue_work(hdev->workqueue, &hdev->tx_work);
4585 }
4586
4587 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4588                                 struct sk_buff *skb)
4589 {
4590         struct hci_ev_mode_change *ev = data;
4591         struct hci_conn *conn;
4592
4593         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4594
4595         hci_dev_lock(hdev);
4596
4597         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4598         if (conn) {
4599                 conn->mode = ev->mode;
4600
4601                 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4602                                         &conn->flags)) {
4603                         if (conn->mode == HCI_CM_ACTIVE)
4604                                 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4605                         else
4606                                 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4607                 }
4608
4609                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4610                         hci_sco_setup(conn, ev->status);
4611         }
4612
4613         hci_dev_unlock(hdev);
4614 }
4615
4616 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4617                                      struct sk_buff *skb)
4618 {
4619         struct hci_ev_pin_code_req *ev = data;
4620         struct hci_conn *conn;
4621
4622         bt_dev_dbg(hdev, "");
4623
4624         hci_dev_lock(hdev);
4625
4626         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4627         if (!conn)
4628                 goto unlock;
4629
4630         if (conn->state == BT_CONNECTED) {
4631                 hci_conn_hold(conn);
4632                 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4633                 hci_conn_drop(conn);
4634         }
4635
4636         if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4637             !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4638                 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4639                              sizeof(ev->bdaddr), &ev->bdaddr);
4640         } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4641                 u8 secure;
4642
4643                 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4644                         secure = 1;
4645                 else
4646                         secure = 0;
4647
4648                 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4649         }
4650
4651 unlock:
4652         hci_dev_unlock(hdev);
4653 }
4654
4655 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4656 {
4657         if (key_type == HCI_LK_CHANGED_COMBINATION)
4658                 return;
4659
4660         conn->pin_length = pin_len;
4661         conn->key_type = key_type;
4662
4663         switch (key_type) {
4664         case HCI_LK_LOCAL_UNIT:
4665         case HCI_LK_REMOTE_UNIT:
4666         case HCI_LK_DEBUG_COMBINATION:
4667                 return;
4668         case HCI_LK_COMBINATION:
4669                 if (pin_len == 16)
4670                         conn->pending_sec_level = BT_SECURITY_HIGH;
4671                 else
4672                         conn->pending_sec_level = BT_SECURITY_MEDIUM;
4673                 break;
4674         case HCI_LK_UNAUTH_COMBINATION_P192:
4675         case HCI_LK_UNAUTH_COMBINATION_P256:
4676                 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4677                 break;
4678         case HCI_LK_AUTH_COMBINATION_P192:
4679                 conn->pending_sec_level = BT_SECURITY_HIGH;
4680                 break;
4681         case HCI_LK_AUTH_COMBINATION_P256:
4682                 conn->pending_sec_level = BT_SECURITY_FIPS;
4683                 break;
4684         }
4685 }
4686
4687 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4688                                      struct sk_buff *skb)
4689 {
4690         struct hci_ev_link_key_req *ev = data;
4691         struct hci_cp_link_key_reply cp;
4692         struct hci_conn *conn;
4693         struct link_key *key;
4694
4695         bt_dev_dbg(hdev, "");
4696
4697         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4698                 return;
4699
4700         hci_dev_lock(hdev);
4701
4702         key = hci_find_link_key(hdev, &ev->bdaddr);
4703         if (!key) {
4704                 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4705                 goto not_found;
4706         }
4707
4708         bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4709
4710         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4711         if (conn) {
4712                 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4713
4714                 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4715                      key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4716                     conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4717                         bt_dev_dbg(hdev, "ignoring unauthenticated key");
4718                         goto not_found;
4719                 }
4720
4721                 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4722                     (conn->pending_sec_level == BT_SECURITY_HIGH ||
4723                      conn->pending_sec_level == BT_SECURITY_FIPS)) {
4724                         bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4725                         goto not_found;
4726                 }
4727
4728                 conn_set_key(conn, key->type, key->pin_len);
4729         }
4730
4731         bacpy(&cp.bdaddr, &ev->bdaddr);
4732         memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4733
4734         hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4735
4736         hci_dev_unlock(hdev);
4737
4738         return;
4739
4740 not_found:
4741         hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4742         hci_dev_unlock(hdev);
4743 }
4744
4745 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4746                                     struct sk_buff *skb)
4747 {
4748         struct hci_ev_link_key_notify *ev = data;
4749         struct hci_conn *conn;
4750         struct link_key *key;
4751         bool persistent;
4752         u8 pin_len = 0;
4753
4754         bt_dev_dbg(hdev, "");
4755
4756         hci_dev_lock(hdev);
4757
4758         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4759         if (!conn)
4760                 goto unlock;
4761
4762         /* Ignore NULL link key against CVE-2020-26555 */
4763         if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4764                 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4765                            &ev->bdaddr);
4766                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4767                 hci_conn_drop(conn);
4768                 goto unlock;
4769         }
4770
4771         hci_conn_hold(conn);
4772         conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4773         hci_conn_drop(conn);
4774
4775         set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4776         conn_set_key(conn, ev->key_type, conn->pin_length);
4777
4778         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4779                 goto unlock;
4780
4781         key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4782                                 ev->key_type, pin_len, &persistent);
4783         if (!key)
4784                 goto unlock;
4785
4786         /* Update connection information since adding the key will have
4787          * fixed up the type in the case of changed combination keys.
4788          */
4789         if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4790                 conn_set_key(conn, key->type, key->pin_len);
4791
4792         mgmt_new_link_key(hdev, key, persistent);
4793
4794         /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4795          * is set. If it's not set simply remove the key from the kernel
4796          * list (we've still notified user space about it but with
4797          * store_hint being 0).
4798          */
4799         if (key->type == HCI_LK_DEBUG_COMBINATION &&
4800             !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4801                 list_del_rcu(&key->list);
4802                 kfree_rcu(key, rcu);
4803                 goto unlock;
4804         }
4805
4806         if (persistent)
4807                 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4808         else
4809                 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4810
4811 unlock:
4812         hci_dev_unlock(hdev);
4813 }
4814
4815 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4816                                  struct sk_buff *skb)
4817 {
4818         struct hci_ev_clock_offset *ev = data;
4819         struct hci_conn *conn;
4820
4821         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4822
4823         hci_dev_lock(hdev);
4824
4825         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4826         if (conn && !ev->status) {
4827                 struct inquiry_entry *ie;
4828
4829                 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4830                 if (ie) {
4831                         ie->data.clock_offset = ev->clock_offset;
4832                         ie->timestamp = jiffies;
4833                 }
4834         }
4835
4836         hci_dev_unlock(hdev);
4837 }
4838
4839 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4840                                     struct sk_buff *skb)
4841 {
4842         struct hci_ev_pkt_type_change *ev = data;
4843         struct hci_conn *conn;
4844
4845         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4846
4847         hci_dev_lock(hdev);
4848
4849         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4850         if (conn && !ev->status)
4851                 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4852
4853         hci_dev_unlock(hdev);
4854 }
4855
4856 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4857                                    struct sk_buff *skb)
4858 {
4859         struct hci_ev_pscan_rep_mode *ev = data;
4860         struct inquiry_entry *ie;
4861
4862         bt_dev_dbg(hdev, "");
4863
4864         hci_dev_lock(hdev);
4865
4866         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4867         if (ie) {
4868                 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4869                 ie->timestamp = jiffies;
4870         }
4871
4872         hci_dev_unlock(hdev);
4873 }
4874
4875 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4876                                              struct sk_buff *skb)
4877 {
4878         struct hci_ev_inquiry_result_rssi *ev = edata;
4879         struct inquiry_data data;
4880         int i;
4881
4882         bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4883
4884         if (!ev->num)
4885                 return;
4886
4887         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4888                 return;
4889
4890         hci_dev_lock(hdev);
4891
4892         if (skb->len == array_size(ev->num,
4893                                    sizeof(struct inquiry_info_rssi_pscan))) {
4894                 struct inquiry_info_rssi_pscan *info;
4895
4896                 for (i = 0; i < ev->num; i++) {
4897                         u32 flags;
4898
4899                         info = hci_ev_skb_pull(hdev, skb,
4900                                                HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4901                                                sizeof(*info));
4902                         if (!info) {
4903                                 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4904                                            HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4905                                 goto unlock;
4906                         }
4907
4908                         bacpy(&data.bdaddr, &info->bdaddr);
4909                         data.pscan_rep_mode     = info->pscan_rep_mode;
4910                         data.pscan_period_mode  = info->pscan_period_mode;
4911                         data.pscan_mode         = info->pscan_mode;
4912                         memcpy(data.dev_class, info->dev_class, 3);
4913                         data.clock_offset       = info->clock_offset;
4914                         data.rssi               = info->rssi;
4915                         data.ssp_mode           = 0x00;
4916
4917                         flags = hci_inquiry_cache_update(hdev, &data, false);
4918
4919                         mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4920                                           info->dev_class, info->rssi,
4921                                           flags, NULL, 0, NULL, 0, 0);
4922                 }
4923         } else if (skb->len == array_size(ev->num,
4924                                           sizeof(struct inquiry_info_rssi))) {
4925                 struct inquiry_info_rssi *info;
4926
4927                 for (i = 0; i < ev->num; i++) {
4928                         u32 flags;
4929
4930                         info = hci_ev_skb_pull(hdev, skb,
4931                                                HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4932                                                sizeof(*info));
4933                         if (!info) {
4934                                 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4935                                            HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4936                                 goto unlock;
4937                         }
4938
4939                         bacpy(&data.bdaddr, &info->bdaddr);
4940                         data.pscan_rep_mode     = info->pscan_rep_mode;
4941                         data.pscan_period_mode  = info->pscan_period_mode;
4942                         data.pscan_mode         = 0x00;
4943                         memcpy(data.dev_class, info->dev_class, 3);
4944                         data.clock_offset       = info->clock_offset;
4945                         data.rssi               = info->rssi;
4946                         data.ssp_mode           = 0x00;
4947
4948                         flags = hci_inquiry_cache_update(hdev, &data, false);
4949
4950                         mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4951                                           info->dev_class, info->rssi,
4952                                           flags, NULL, 0, NULL, 0, 0);
4953                 }
4954         } else {
4955                 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4956                            HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4957         }
4958 unlock:
4959         hci_dev_unlock(hdev);
4960 }
4961
4962 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4963                                         struct sk_buff *skb)
4964 {
4965         struct hci_ev_remote_ext_features *ev = data;
4966         struct hci_conn *conn;
4967
4968         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4969
4970         hci_dev_lock(hdev);
4971
4972         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4973         if (!conn)
4974                 goto unlock;
4975
4976         if (ev->page < HCI_MAX_PAGES)
4977                 memcpy(conn->features[ev->page], ev->features, 8);
4978
4979         if (!ev->status && ev->page == 0x01) {
4980                 struct inquiry_entry *ie;
4981
4982                 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4983                 if (ie)
4984                         ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4985
4986                 if (ev->features[0] & LMP_HOST_SSP) {
4987                         set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4988                 } else {
4989                         /* It is mandatory by the Bluetooth specification that
4990                          * Extended Inquiry Results are only used when Secure
4991                          * Simple Pairing is enabled, but some devices violate
4992                          * this.
4993                          *
4994                          * To make these devices work, the internal SSP
4995                          * enabled flag needs to be cleared if the remote host
4996                          * features do not indicate SSP support */
4997                         clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4998                 }
4999
5000                 if (ev->features[0] & LMP_HOST_SC)
5001                         set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
5002         }
5003
5004         if (conn->state != BT_CONFIG)
5005                 goto unlock;
5006
5007         if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
5008                 struct hci_cp_remote_name_req cp;
5009                 memset(&cp, 0, sizeof(cp));
5010                 bacpy(&cp.bdaddr, &conn->dst);
5011                 cp.pscan_rep_mode = 0x02;
5012                 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
5013         } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
5014                 mgmt_device_connected(hdev, conn, NULL, 0);
5015
5016         if (!hci_outgoing_auth_needed(hdev, conn)) {
5017                 conn->state = BT_CONNECTED;
5018                 hci_connect_cfm(conn, ev->status);
5019                 hci_conn_drop(conn);
5020         }
5021
5022 unlock:
5023         hci_dev_unlock(hdev);
5024 }
5025
5026 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
5027                                        struct sk_buff *skb)
5028 {
5029         struct hci_ev_sync_conn_complete *ev = data;
5030         struct hci_conn *conn;
5031         u8 status = ev->status;
5032
5033         switch (ev->link_type) {
5034         case SCO_LINK:
5035         case ESCO_LINK:
5036                 break;
5037         default:
5038                 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
5039                  * for HCI_Synchronous_Connection_Complete is limited to
5040                  * either SCO or eSCO
5041                  */
5042                 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
5043                 return;
5044         }
5045
5046         bt_dev_dbg(hdev, "status 0x%2.2x", status);
5047
5048         hci_dev_lock(hdev);
5049
5050         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
5051         if (!conn) {
5052                 if (ev->link_type == ESCO_LINK)
5053                         goto unlock;
5054
5055                 /* When the link type in the event indicates SCO connection
5056                  * and lookup of the connection object fails, then check
5057                  * if an eSCO connection object exists.
5058                  *
5059                  * The core limits the synchronous connections to either
5060                  * SCO or eSCO. The eSCO connection is preferred and tried
5061                  * to be setup first and until successfully established,
5062                  * the link type will be hinted as eSCO.
5063                  */
5064                 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
5065                 if (!conn)
5066                         goto unlock;
5067         }
5068
5069         /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
5070          * Processing it more than once per connection can corrupt kernel memory.
5071          *
5072          * As the connection handle is set here for the first time, it indicates
5073          * whether the connection is already set up.
5074          */
5075         if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5076                 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
5077                 goto unlock;
5078         }
5079
5080         switch (status) {
5081         case 0x00:
5082                 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
5083                 if (status) {
5084                         conn->state = BT_CLOSED;
5085                         break;
5086                 }
5087
5088                 conn->state  = BT_CONNECTED;
5089                 conn->type   = ev->link_type;
5090
5091                 hci_debugfs_create_conn(conn);
5092                 hci_conn_add_sysfs(conn);
5093                 break;
5094
5095         case 0x10:      /* Connection Accept Timeout */
5096         case 0x0d:      /* Connection Rejected due to Limited Resources */
5097         case 0x11:      /* Unsupported Feature or Parameter Value */
5098         case 0x1c:      /* SCO interval rejected */
5099         case 0x1a:      /* Unsupported Remote Feature */
5100         case 0x1e:      /* Invalid LMP Parameters */
5101         case 0x1f:      /* Unspecified error */
5102         case 0x20:      /* Unsupported LMP Parameter value */
5103                 if (conn->out) {
5104                         conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
5105                                         (hdev->esco_type & EDR_ESCO_MASK);
5106                         if (hci_setup_sync(conn, conn->parent->handle))
5107                                 goto unlock;
5108                 }
5109                 fallthrough;
5110
5111         default:
5112                 conn->state = BT_CLOSED;
5113                 break;
5114         }
5115
5116         bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5117         /* Notify only in case of SCO over HCI transport data path which
5118          * is zero and non-zero value shall be non-HCI transport data path
5119          */
5120         if (conn->codec.data_path == 0 && hdev->notify) {
5121                 switch (ev->air_mode) {
5122                 case 0x02:
5123                         hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5124                         break;
5125                 case 0x03:
5126                         hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5127                         break;
5128                 }
5129         }
5130
5131         hci_connect_cfm(conn, status);
5132         if (status)
5133                 hci_conn_del(conn);
5134
5135 unlock:
5136         hci_dev_unlock(hdev);
5137 }
5138
5139 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5140 {
5141         size_t parsed = 0;
5142
5143         while (parsed < eir_len) {
5144                 u8 field_len = eir[0];
5145
5146                 if (field_len == 0)
5147                         return parsed;
5148
5149                 parsed += field_len + 1;
5150                 eir += field_len + 1;
5151         }
5152
5153         return eir_len;
5154 }
5155
5156 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5157                                             struct sk_buff *skb)
5158 {
5159         struct hci_ev_ext_inquiry_result *ev = edata;
5160         struct inquiry_data data;
5161         size_t eir_len;
5162         int i;
5163
5164         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5165                              flex_array_size(ev, info, ev->num)))
5166                 return;
5167
5168         bt_dev_dbg(hdev, "num %d", ev->num);
5169
5170         if (!ev->num)
5171                 return;
5172
5173         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5174                 return;
5175
5176         hci_dev_lock(hdev);
5177
5178         for (i = 0; i < ev->num; i++) {
5179                 struct extended_inquiry_info *info = &ev->info[i];
5180                 u32 flags;
5181                 bool name_known;
5182
5183                 bacpy(&data.bdaddr, &info->bdaddr);
5184                 data.pscan_rep_mode     = info->pscan_rep_mode;
5185                 data.pscan_period_mode  = info->pscan_period_mode;
5186                 data.pscan_mode         = 0x00;
5187                 memcpy(data.dev_class, info->dev_class, 3);
5188                 data.clock_offset       = info->clock_offset;
5189                 data.rssi               = info->rssi;
5190                 data.ssp_mode           = 0x01;
5191
5192                 if (hci_dev_test_flag(hdev, HCI_MGMT))
5193                         name_known = eir_get_data(info->data,
5194                                                   sizeof(info->data),
5195                                                   EIR_NAME_COMPLETE, NULL);
5196                 else
5197                         name_known = true;
5198
5199                 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5200
5201                 eir_len = eir_get_length(info->data, sizeof(info->data));
5202
5203                 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5204                                   info->dev_class, info->rssi,
5205                                   flags, info->data, eir_len, NULL, 0, 0);
5206         }
5207
5208         hci_dev_unlock(hdev);
5209 }
5210
5211 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5212                                          struct sk_buff *skb)
5213 {
5214         struct hci_ev_key_refresh_complete *ev = data;
5215         struct hci_conn *conn;
5216
5217         bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5218                    __le16_to_cpu(ev->handle));
5219
5220         hci_dev_lock(hdev);
5221
5222         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5223         if (!conn)
5224                 goto unlock;
5225
5226         /* For BR/EDR the necessary steps are taken through the
5227          * auth_complete event.
5228          */
5229         if (conn->type != LE_LINK)
5230                 goto unlock;
5231
5232         if (!ev->status)
5233                 conn->sec_level = conn->pending_sec_level;
5234
5235         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5236
5237         if (ev->status && conn->state == BT_CONNECTED) {
5238                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5239                 hci_conn_drop(conn);
5240                 goto unlock;
5241         }
5242
5243         if (conn->state == BT_CONFIG) {
5244                 if (!ev->status)
5245                         conn->state = BT_CONNECTED;
5246
5247                 hci_connect_cfm(conn, ev->status);
5248                 hci_conn_drop(conn);
5249         } else {
5250                 hci_auth_cfm(conn, ev->status);
5251
5252                 hci_conn_hold(conn);
5253                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5254                 hci_conn_drop(conn);
5255         }
5256
5257 unlock:
5258         hci_dev_unlock(hdev);
5259 }
5260
5261 static u8 hci_get_auth_req(struct hci_conn *conn)
5262 {
5263         /* If remote requests no-bonding follow that lead */
5264         if (conn->remote_auth == HCI_AT_NO_BONDING ||
5265             conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5266                 return conn->remote_auth | (conn->auth_type & 0x01);
5267
5268         /* If both remote and local have enough IO capabilities, require
5269          * MITM protection
5270          */
5271         if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5272             conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5273                 return conn->remote_auth | 0x01;
5274
5275         /* No MITM protection possible so ignore remote requirement */
5276         return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5277 }
5278
5279 static u8 bredr_oob_data_present(struct hci_conn *conn)
5280 {
5281         struct hci_dev *hdev = conn->hdev;
5282         struct oob_data *data;
5283
5284         data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5285         if (!data)
5286                 return 0x00;
5287
5288         if (bredr_sc_enabled(hdev)) {
5289                 /* When Secure Connections is enabled, then just
5290                  * return the present value stored with the OOB
5291                  * data. The stored value contains the right present
5292                  * information. However it can only be trusted when
5293                  * not in Secure Connection Only mode.
5294                  */
5295                 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5296                         return data->present;
5297
5298                 /* When Secure Connections Only mode is enabled, then
5299                  * the P-256 values are required. If they are not
5300                  * available, then do not declare that OOB data is
5301                  * present.
5302                  */
5303                 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5304                     !crypto_memneq(data->hash256, ZERO_KEY, 16))
5305                         return 0x00;
5306
5307                 return 0x02;
5308         }
5309
5310         /* When Secure Connections is not enabled or actually
5311          * not supported by the hardware, then check that if
5312          * P-192 data values are present.
5313          */
5314         if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5315             !crypto_memneq(data->hash192, ZERO_KEY, 16))
5316                 return 0x00;
5317
5318         return 0x01;
5319 }
5320
5321 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5322                                     struct sk_buff *skb)
5323 {
5324         struct hci_ev_io_capa_request *ev = data;
5325         struct hci_conn *conn;
5326
5327         bt_dev_dbg(hdev, "");
5328
5329         hci_dev_lock(hdev);
5330
5331         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5332         if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5333                 goto unlock;
5334
5335         /* Assume remote supports SSP since it has triggered this event */
5336         set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5337
5338         hci_conn_hold(conn);
5339
5340         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5341                 goto unlock;
5342
5343         /* Allow pairing if we're pairable, the initiators of the
5344          * pairing or if the remote is not requesting bonding.
5345          */
5346         if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5347             test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5348             (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5349                 struct hci_cp_io_capability_reply cp;
5350
5351                 bacpy(&cp.bdaddr, &ev->bdaddr);
5352                 /* Change the IO capability from KeyboardDisplay
5353                  * to DisplayYesNo as it is not supported by BT spec. */
5354                 cp.capability = (conn->io_capability == 0x04) ?
5355                                 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5356
5357                 /* If we are initiators, there is no remote information yet */
5358                 if (conn->remote_auth == 0xff) {
5359                         /* Request MITM protection if our IO caps allow it
5360                          * except for the no-bonding case.
5361                          */
5362                         if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5363                             conn->auth_type != HCI_AT_NO_BONDING)
5364                                 conn->auth_type |= 0x01;
5365                 } else {
5366                         conn->auth_type = hci_get_auth_req(conn);
5367                 }
5368
5369                 /* If we're not bondable, force one of the non-bondable
5370                  * authentication requirement values.
5371                  */
5372                 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5373                         conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5374
5375                 cp.authentication = conn->auth_type;
5376                 cp.oob_data = bredr_oob_data_present(conn);
5377
5378                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5379                              sizeof(cp), &cp);
5380         } else {
5381                 struct hci_cp_io_capability_neg_reply cp;
5382
5383                 bacpy(&cp.bdaddr, &ev->bdaddr);
5384                 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5385
5386                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5387                              sizeof(cp), &cp);
5388         }
5389
5390 unlock:
5391         hci_dev_unlock(hdev);
5392 }
5393
5394 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5395                                   struct sk_buff *skb)
5396 {
5397         struct hci_ev_io_capa_reply *ev = data;
5398         struct hci_conn *conn;
5399
5400         bt_dev_dbg(hdev, "");
5401
5402         hci_dev_lock(hdev);
5403
5404         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5405         if (!conn)
5406                 goto unlock;
5407
5408         conn->remote_cap = ev->capability;
5409         conn->remote_auth = ev->authentication;
5410
5411 unlock:
5412         hci_dev_unlock(hdev);
5413 }
5414
5415 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5416                                          struct sk_buff *skb)
5417 {
5418         struct hci_ev_user_confirm_req *ev = data;
5419         int loc_mitm, rem_mitm, confirm_hint = 0;
5420         struct hci_conn *conn;
5421
5422         bt_dev_dbg(hdev, "");
5423
5424         hci_dev_lock(hdev);
5425
5426         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5427                 goto unlock;
5428
5429         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5430         if (!conn)
5431                 goto unlock;
5432
5433         loc_mitm = (conn->auth_type & 0x01);
5434         rem_mitm = (conn->remote_auth & 0x01);
5435
5436         /* If we require MITM but the remote device can't provide that
5437          * (it has NoInputNoOutput) then reject the confirmation
5438          * request. We check the security level here since it doesn't
5439          * necessarily match conn->auth_type.
5440          */
5441         if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5442             conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5443                 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5444                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5445                              sizeof(ev->bdaddr), &ev->bdaddr);
5446                 goto unlock;
5447         }
5448
5449         /* If no side requires MITM protection; auto-accept */
5450         if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5451             (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5452
5453                 /* If we're not the initiators request authorization to
5454                  * proceed from user space (mgmt_user_confirm with
5455                  * confirm_hint set to 1). The exception is if neither
5456                  * side had MITM or if the local IO capability is
5457                  * NoInputNoOutput, in which case we do auto-accept
5458                  */
5459                 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5460                     conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5461                     (loc_mitm || rem_mitm)) {
5462                         bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5463                         confirm_hint = 1;
5464                         goto confirm;
5465                 }
5466
5467                 /* If there already exists link key in local host, leave the
5468                  * decision to user space since the remote device could be
5469                  * legitimate or malicious.
5470                  */
5471                 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5472                         bt_dev_dbg(hdev, "Local host already has link key");
5473                         confirm_hint = 1;
5474                         goto confirm;
5475                 }
5476
5477                 BT_DBG("Auto-accept of user confirmation with %ums delay",
5478                        hdev->auto_accept_delay);
5479
5480                 if (hdev->auto_accept_delay > 0) {
5481                         int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5482                         queue_delayed_work(conn->hdev->workqueue,
5483                                            &conn->auto_accept_work, delay);
5484                         goto unlock;
5485                 }
5486
5487                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5488                              sizeof(ev->bdaddr), &ev->bdaddr);
5489                 goto unlock;
5490         }
5491
5492 confirm:
5493         mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5494                                   le32_to_cpu(ev->passkey), confirm_hint);
5495
5496 unlock:
5497         hci_dev_unlock(hdev);
5498 }
5499
5500 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5501                                          struct sk_buff *skb)
5502 {
5503         struct hci_ev_user_passkey_req *ev = data;
5504
5505         bt_dev_dbg(hdev, "");
5506
5507         if (hci_dev_test_flag(hdev, HCI_MGMT))
5508                 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5509 }
5510
5511 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5512                                         struct sk_buff *skb)
5513 {
5514         struct hci_ev_user_passkey_notify *ev = data;
5515         struct hci_conn *conn;
5516
5517         bt_dev_dbg(hdev, "");
5518
5519         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5520         if (!conn)
5521                 return;
5522
5523         conn->passkey_notify = __le32_to_cpu(ev->passkey);
5524         conn->passkey_entered = 0;
5525
5526         if (hci_dev_test_flag(hdev, HCI_MGMT))
5527                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5528                                          conn->dst_type, conn->passkey_notify,
5529                                          conn->passkey_entered);
5530 }
5531
5532 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5533                                     struct sk_buff *skb)
5534 {
5535         struct hci_ev_keypress_notify *ev = data;
5536         struct hci_conn *conn;
5537
5538         bt_dev_dbg(hdev, "");
5539
5540         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5541         if (!conn)
5542                 return;
5543
5544         switch (ev->type) {
5545         case HCI_KEYPRESS_STARTED:
5546                 conn->passkey_entered = 0;
5547                 return;
5548
5549         case HCI_KEYPRESS_ENTERED:
5550                 conn->passkey_entered++;
5551                 break;
5552
5553         case HCI_KEYPRESS_ERASED:
5554                 conn->passkey_entered--;
5555                 break;
5556
5557         case HCI_KEYPRESS_CLEARED:
5558                 conn->passkey_entered = 0;
5559                 break;
5560
5561         case HCI_KEYPRESS_COMPLETED:
5562                 return;
5563         }
5564
5565         if (hci_dev_test_flag(hdev, HCI_MGMT))
5566                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5567                                          conn->dst_type, conn->passkey_notify,
5568                                          conn->passkey_entered);
5569 }
5570
5571 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5572                                          struct sk_buff *skb)
5573 {
5574         struct hci_ev_simple_pair_complete *ev = data;
5575         struct hci_conn *conn;
5576
5577         bt_dev_dbg(hdev, "");
5578
5579         hci_dev_lock(hdev);
5580
5581         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5582         if (!conn || !hci_conn_ssp_enabled(conn))
5583                 goto unlock;
5584
5585         /* Reset the authentication requirement to unknown */
5586         conn->remote_auth = 0xff;
5587
5588         /* To avoid duplicate auth_failed events to user space we check
5589          * the HCI_CONN_AUTH_PEND flag which will be set if we
5590          * initiated the authentication. A traditional auth_complete
5591          * event gets always produced as initiator and is also mapped to
5592          * the mgmt_auth_failed event */
5593         if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5594                 mgmt_auth_failed(conn, ev->status);
5595
5596         hci_conn_drop(conn);
5597
5598 unlock:
5599         hci_dev_unlock(hdev);
5600 }
5601
5602 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5603                                          struct sk_buff *skb)
5604 {
5605         struct hci_ev_remote_host_features *ev = data;
5606         struct inquiry_entry *ie;
5607         struct hci_conn *conn;
5608
5609         bt_dev_dbg(hdev, "");
5610
5611         hci_dev_lock(hdev);
5612
5613         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5614         if (conn)
5615                 memcpy(conn->features[1], ev->features, 8);
5616
5617         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5618         if (ie)
5619                 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5620
5621         hci_dev_unlock(hdev);
5622 }
5623
5624 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5625                                             struct sk_buff *skb)
5626 {
5627         struct hci_ev_remote_oob_data_request *ev = edata;
5628         struct oob_data *data;
5629
5630         bt_dev_dbg(hdev, "");
5631
5632         hci_dev_lock(hdev);
5633
5634         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5635                 goto unlock;
5636
5637         data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5638         if (!data) {
5639                 struct hci_cp_remote_oob_data_neg_reply cp;
5640
5641                 bacpy(&cp.bdaddr, &ev->bdaddr);
5642                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5643                              sizeof(cp), &cp);
5644                 goto unlock;
5645         }
5646
5647         if (bredr_sc_enabled(hdev)) {
5648                 struct hci_cp_remote_oob_ext_data_reply cp;
5649
5650                 bacpy(&cp.bdaddr, &ev->bdaddr);
5651                 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5652                         memset(cp.hash192, 0, sizeof(cp.hash192));
5653                         memset(cp.rand192, 0, sizeof(cp.rand192));
5654                 } else {
5655                         memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5656                         memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5657                 }
5658                 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5659                 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5660
5661                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5662                              sizeof(cp), &cp);
5663         } else {
5664                 struct hci_cp_remote_oob_data_reply cp;
5665
5666                 bacpy(&cp.bdaddr, &ev->bdaddr);
5667                 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5668                 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5669
5670                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5671                              sizeof(cp), &cp);
5672         }
5673
5674 unlock:
5675         hci_dev_unlock(hdev);
5676 }
5677
5678 #if IS_ENABLED(CONFIG_BT_HS)
5679 static void hci_chan_selected_evt(struct hci_dev *hdev, void *data,
5680                                   struct sk_buff *skb)
5681 {
5682         struct hci_ev_channel_selected *ev = data;
5683         struct hci_conn *hcon;
5684
5685         bt_dev_dbg(hdev, "handle 0x%2.2x", ev->phy_handle);
5686
5687         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5688         if (!hcon)
5689                 return;
5690
5691         amp_read_loc_assoc_final_data(hdev, hcon);
5692 }
5693
5694 static void hci_phy_link_complete_evt(struct hci_dev *hdev, void *data,
5695                                       struct sk_buff *skb)
5696 {
5697         struct hci_ev_phy_link_complete *ev = data;
5698         struct hci_conn *hcon, *bredr_hcon;
5699
5700         bt_dev_dbg(hdev, "handle 0x%2.2x status 0x%2.2x", ev->phy_handle,
5701                    ev->status);
5702
5703         hci_dev_lock(hdev);
5704
5705         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5706         if (!hcon)
5707                 goto unlock;
5708
5709         if (!hcon->amp_mgr)
5710                 goto unlock;
5711
5712         if (ev->status) {
5713                 hci_conn_del(hcon);
5714                 goto unlock;
5715         }
5716
5717         bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
5718
5719         hcon->state = BT_CONNECTED;
5720         bacpy(&hcon->dst, &bredr_hcon->dst);
5721
5722         hci_conn_hold(hcon);
5723         hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
5724         hci_conn_drop(hcon);
5725
5726         hci_debugfs_create_conn(hcon);
5727         hci_conn_add_sysfs(hcon);
5728
5729         amp_physical_cfm(bredr_hcon, hcon);
5730
5731 unlock:
5732         hci_dev_unlock(hdev);
5733 }
5734
5735 static void hci_loglink_complete_evt(struct hci_dev *hdev, void *data,
5736                                      struct sk_buff *skb)
5737 {
5738         struct hci_ev_logical_link_complete *ev = data;
5739         struct hci_conn *hcon;
5740         struct hci_chan *hchan;
5741         struct amp_mgr *mgr;
5742
5743         bt_dev_dbg(hdev, "log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
5744                    le16_to_cpu(ev->handle), ev->phy_handle, ev->status);
5745
5746         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5747         if (!hcon)
5748                 return;
5749
5750         /* Create AMP hchan */
5751         hchan = hci_chan_create(hcon);
5752         if (!hchan)
5753                 return;
5754
5755         hchan->handle = le16_to_cpu(ev->handle);
5756         hchan->amp = true;
5757
5758         BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
5759
5760         mgr = hcon->amp_mgr;
5761         if (mgr && mgr->bredr_chan) {
5762                 struct l2cap_chan *bredr_chan = mgr->bredr_chan;
5763
5764                 l2cap_chan_lock(bredr_chan);
5765
5766                 bredr_chan->conn->mtu = hdev->block_mtu;
5767                 l2cap_logical_cfm(bredr_chan, hchan, 0);
5768                 hci_conn_hold(hcon);
5769
5770                 l2cap_chan_unlock(bredr_chan);
5771         }
5772 }
5773
5774 static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev, void *data,
5775                                              struct sk_buff *skb)
5776 {
5777         struct hci_ev_disconn_logical_link_complete *ev = data;
5778         struct hci_chan *hchan;
5779
5780         bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x",
5781                    le16_to_cpu(ev->handle), ev->status);
5782
5783         if (ev->status)
5784                 return;
5785
5786         hci_dev_lock(hdev);
5787
5788         hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
5789         if (!hchan || !hchan->amp)
5790                 goto unlock;
5791
5792         amp_destroy_logical_link(hchan, ev->reason);
5793
5794 unlock:
5795         hci_dev_unlock(hdev);
5796 }
5797
5798 static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev, void *data,
5799                                              struct sk_buff *skb)
5800 {
5801         struct hci_ev_disconn_phy_link_complete *ev = data;
5802         struct hci_conn *hcon;
5803
5804         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5805
5806         if (ev->status)
5807                 return;
5808
5809         hci_dev_lock(hdev);
5810
5811         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5812         if (hcon && hcon->type == AMP_LINK) {
5813                 hcon->state = BT_CLOSED;
5814                 hci_disconn_cfm(hcon, ev->reason);
5815                 hci_conn_del(hcon);
5816         }
5817
5818         hci_dev_unlock(hdev);
5819 }
5820 #endif
5821
5822 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5823                                 u8 bdaddr_type, bdaddr_t *local_rpa)
5824 {
5825         if (conn->out) {
5826                 conn->dst_type = bdaddr_type;
5827                 conn->resp_addr_type = bdaddr_type;
5828                 bacpy(&conn->resp_addr, bdaddr);
5829
5830                 /* Check if the controller has set a Local RPA then it must be
5831                  * used instead or hdev->rpa.
5832                  */
5833                 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5834                         conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5835                         bacpy(&conn->init_addr, local_rpa);
5836                 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5837                         conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5838                         bacpy(&conn->init_addr, &conn->hdev->rpa);
5839                 } else {
5840                         hci_copy_identity_address(conn->hdev, &conn->init_addr,
5841                                                   &conn->init_addr_type);
5842                 }
5843         } else {
5844                 conn->resp_addr_type = conn->hdev->adv_addr_type;
5845                 /* Check if the controller has set a Local RPA then it must be
5846                  * used instead or hdev->rpa.
5847                  */
5848                 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5849                         conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5850                         bacpy(&conn->resp_addr, local_rpa);
5851                 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5852                         /* In case of ext adv, resp_addr will be updated in
5853                          * Adv Terminated event.
5854                          */
5855                         if (!ext_adv_capable(conn->hdev))
5856                                 bacpy(&conn->resp_addr,
5857                                       &conn->hdev->random_addr);
5858                 } else {
5859                         bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5860                 }
5861
5862                 conn->init_addr_type = bdaddr_type;
5863                 bacpy(&conn->init_addr, bdaddr);
5864
5865                 /* For incoming connections, set the default minimum
5866                  * and maximum connection interval. They will be used
5867                  * to check if the parameters are in range and if not
5868                  * trigger the connection update procedure.
5869                  */
5870                 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5871                 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5872         }
5873 }
5874
5875 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5876                                  bdaddr_t *bdaddr, u8 bdaddr_type,
5877                                  bdaddr_t *local_rpa, u8 role, u16 handle,
5878                                  u16 interval, u16 latency,
5879                                  u16 supervision_timeout)
5880 {
5881         struct hci_conn_params *params;
5882         struct hci_conn *conn;
5883         struct smp_irk *irk;
5884         u8 addr_type;
5885
5886         hci_dev_lock(hdev);
5887
5888         /* All controllers implicitly stop advertising in the event of a
5889          * connection, so ensure that the state bit is cleared.
5890          */
5891         hci_dev_clear_flag(hdev, HCI_LE_ADV);
5892
5893         conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5894         if (!conn) {
5895                 /* In case of error status and there is no connection pending
5896                  * just unlock as there is nothing to cleanup.
5897                  */
5898                 if (status)
5899                         goto unlock;
5900
5901                 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5902                 if (!conn) {
5903                         bt_dev_err(hdev, "no memory for new connection");
5904                         goto unlock;
5905                 }
5906
5907                 conn->dst_type = bdaddr_type;
5908
5909                 /* If we didn't have a hci_conn object previously
5910                  * but we're in central role this must be something
5911                  * initiated using an accept list. Since accept list based
5912                  * connections are not "first class citizens" we don't
5913                  * have full tracking of them. Therefore, we go ahead
5914                  * with a "best effort" approach of determining the
5915                  * initiator address based on the HCI_PRIVACY flag.
5916                  */
5917                 if (conn->out) {
5918                         conn->resp_addr_type = bdaddr_type;
5919                         bacpy(&conn->resp_addr, bdaddr);
5920                         if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5921                                 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5922                                 bacpy(&conn->init_addr, &hdev->rpa);
5923                         } else {
5924                                 hci_copy_identity_address(hdev,
5925                                                           &conn->init_addr,
5926                                                           &conn->init_addr_type);
5927                         }
5928                 }
5929         } else {
5930                 cancel_delayed_work(&conn->le_conn_timeout);
5931         }
5932
5933         /* The HCI_LE_Connection_Complete event is only sent once per connection.
5934          * Processing it more than once per connection can corrupt kernel memory.
5935          *
5936          * As the connection handle is set here for the first time, it indicates
5937          * whether the connection is already set up.
5938          */
5939         if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5940                 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5941                 goto unlock;
5942         }
5943
5944         le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5945
5946         /* Lookup the identity address from the stored connection
5947          * address and address type.
5948          *
5949          * When establishing connections to an identity address, the
5950          * connection procedure will store the resolvable random
5951          * address first. Now if it can be converted back into the
5952          * identity address, start using the identity address from
5953          * now on.
5954          */
5955         irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5956         if (irk) {
5957                 bacpy(&conn->dst, &irk->bdaddr);
5958                 conn->dst_type = irk->addr_type;
5959         }
5960
5961         conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5962
5963         /* All connection failure handling is taken care of by the
5964          * hci_conn_failed function which is triggered by the HCI
5965          * request completion callbacks used for connecting.
5966          */
5967         if (status || hci_conn_set_handle(conn, handle))
5968                 goto unlock;
5969
5970         /* Drop the connection if it has been aborted */
5971         if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5972                 hci_conn_drop(conn);
5973                 goto unlock;
5974         }
5975
5976         if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5977                 addr_type = BDADDR_LE_PUBLIC;
5978         else
5979                 addr_type = BDADDR_LE_RANDOM;
5980
5981         /* Drop the connection if the device is blocked */
5982         if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5983                 hci_conn_drop(conn);
5984                 goto unlock;
5985         }
5986
5987         if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
5988                 mgmt_device_connected(hdev, conn, NULL, 0);
5989
5990         conn->sec_level = BT_SECURITY_LOW;
5991         conn->state = BT_CONFIG;
5992
5993         /* Store current advertising instance as connection advertising instance
5994          * when sotfware rotation is in use so it can be re-enabled when
5995          * disconnected.
5996          */
5997         if (!ext_adv_capable(hdev))
5998                 conn->adv_instance = hdev->cur_adv_instance;
5999
6000         conn->le_conn_interval = interval;
6001         conn->le_conn_latency = latency;
6002         conn->le_supv_timeout = supervision_timeout;
6003
6004         hci_debugfs_create_conn(conn);
6005         hci_conn_add_sysfs(conn);
6006
6007         /* The remote features procedure is defined for central
6008          * role only. So only in case of an initiated connection
6009          * request the remote features.
6010          *
6011          * If the local controller supports peripheral-initiated features
6012          * exchange, then requesting the remote features in peripheral
6013          * role is possible. Otherwise just transition into the
6014          * connected state without requesting the remote features.
6015          */
6016         if (conn->out ||
6017             (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
6018                 struct hci_cp_le_read_remote_features cp;
6019
6020                 cp.handle = __cpu_to_le16(conn->handle);
6021
6022                 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
6023                              sizeof(cp), &cp);
6024
6025                 hci_conn_hold(conn);
6026         } else {
6027                 conn->state = BT_CONNECTED;
6028                 hci_connect_cfm(conn, status);
6029         }
6030
6031         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
6032                                            conn->dst_type);
6033         if (params) {
6034                 hci_pend_le_list_del_init(params);
6035                 if (params->conn) {
6036                         hci_conn_drop(params->conn);
6037                         hci_conn_put(params->conn);
6038                         params->conn = NULL;
6039                 }
6040         }
6041
6042 unlock:
6043         hci_update_passive_scan(hdev);
6044         hci_dev_unlock(hdev);
6045 }
6046
6047 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
6048                                      struct sk_buff *skb)
6049 {
6050         struct hci_ev_le_conn_complete *ev = data;
6051
6052         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6053
6054         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
6055                              NULL, ev->role, le16_to_cpu(ev->handle),
6056                              le16_to_cpu(ev->interval),
6057                              le16_to_cpu(ev->latency),
6058                              le16_to_cpu(ev->supervision_timeout));
6059 }
6060
6061 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
6062                                          struct sk_buff *skb)
6063 {
6064         struct hci_ev_le_enh_conn_complete *ev = data;
6065
6066         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6067
6068         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
6069                              &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
6070                              le16_to_cpu(ev->interval),
6071                              le16_to_cpu(ev->latency),
6072                              le16_to_cpu(ev->supervision_timeout));
6073 }
6074
6075 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
6076                                     struct sk_buff *skb)
6077 {
6078         struct hci_evt_le_ext_adv_set_term *ev = data;
6079         struct hci_conn *conn;
6080         struct adv_info *adv, *n;
6081
6082         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6083
6084         /* The Bluetooth Core 5.3 specification clearly states that this event
6085          * shall not be sent when the Host disables the advertising set. So in
6086          * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
6087          *
6088          * When the Host disables an advertising set, all cleanup is done via
6089          * its command callback and not needed to be duplicated here.
6090          */
6091         if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
6092                 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
6093                 return;
6094         }
6095
6096         hci_dev_lock(hdev);
6097
6098         adv = hci_find_adv_instance(hdev, ev->handle);
6099
6100         if (ev->status) {
6101                 if (!adv)
6102                         goto unlock;
6103
6104                 /* Remove advertising as it has been terminated */
6105                 hci_remove_adv_instance(hdev, ev->handle);
6106                 mgmt_advertising_removed(NULL, hdev, ev->handle);
6107
6108                 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
6109                         if (adv->enabled)
6110                                 goto unlock;
6111                 }
6112
6113                 /* We are no longer advertising, clear HCI_LE_ADV */
6114                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6115                 goto unlock;
6116         }
6117
6118         if (adv)
6119                 adv->enabled = false;
6120
6121         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
6122         if (conn) {
6123                 /* Store handle in the connection so the correct advertising
6124                  * instance can be re-enabled when disconnected.
6125                  */
6126                 conn->adv_instance = ev->handle;
6127
6128                 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
6129                     bacmp(&conn->resp_addr, BDADDR_ANY))
6130                         goto unlock;
6131
6132                 if (!ev->handle) {
6133                         bacpy(&conn->resp_addr, &hdev->random_addr);
6134                         goto unlock;
6135                 }
6136
6137                 if (adv)
6138                         bacpy(&conn->resp_addr, &adv->random_addr);
6139         }
6140
6141 unlock:
6142         hci_dev_unlock(hdev);
6143 }
6144
6145 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
6146                                             struct sk_buff *skb)
6147 {
6148         struct hci_ev_le_conn_update_complete *ev = data;
6149         struct hci_conn *conn;
6150
6151         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6152
6153         if (ev->status)
6154                 return;
6155
6156         hci_dev_lock(hdev);
6157
6158         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6159         if (conn) {
6160                 conn->le_conn_interval = le16_to_cpu(ev->interval);
6161                 conn->le_conn_latency = le16_to_cpu(ev->latency);
6162                 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
6163         }
6164
6165         hci_dev_unlock(hdev);
6166 }
6167
6168 /* This function requires the caller holds hdev->lock */
6169 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
6170                                               bdaddr_t *addr,
6171                                               u8 addr_type, bool addr_resolved,
6172                                               u8 adv_type)
6173 {
6174         struct hci_conn *conn;
6175         struct hci_conn_params *params;
6176
6177         /* If the event is not connectable don't proceed further */
6178         if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
6179                 return NULL;
6180
6181         /* Ignore if the device is blocked or hdev is suspended */
6182         if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
6183             hdev->suspended)
6184                 return NULL;
6185
6186         /* Most controller will fail if we try to create new connections
6187          * while we have an existing one in peripheral role.
6188          */
6189         if (hdev->conn_hash.le_num_peripheral > 0 &&
6190             (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
6191              !(hdev->le_states[3] & 0x10)))
6192                 return NULL;
6193
6194         /* If we're not connectable only connect devices that we have in
6195          * our pend_le_conns list.
6196          */
6197         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
6198                                            addr_type);
6199         if (!params)
6200                 return NULL;
6201
6202         if (!params->explicit_connect) {
6203                 switch (params->auto_connect) {
6204                 case HCI_AUTO_CONN_DIRECT:
6205                         /* Only devices advertising with ADV_DIRECT_IND are
6206                          * triggering a connection attempt. This is allowing
6207                          * incoming connections from peripheral devices.
6208                          */
6209                         if (adv_type != LE_ADV_DIRECT_IND)
6210                                 return NULL;
6211                         break;
6212                 case HCI_AUTO_CONN_ALWAYS:
6213                         /* Devices advertising with ADV_IND or ADV_DIRECT_IND
6214                          * are triggering a connection attempt. This means
6215                          * that incoming connections from peripheral device are
6216                          * accepted and also outgoing connections to peripheral
6217                          * devices are established when found.
6218                          */
6219                         break;
6220                 default:
6221                         return NULL;
6222                 }
6223         }
6224
6225         conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
6226                               BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
6227                               HCI_ROLE_MASTER);
6228         if (!IS_ERR(conn)) {
6229                 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
6230                  * by higher layer that tried to connect, if no then
6231                  * store the pointer since we don't really have any
6232                  * other owner of the object besides the params that
6233                  * triggered it. This way we can abort the connection if
6234                  * the parameters get removed and keep the reference
6235                  * count consistent once the connection is established.
6236                  */
6237
6238                 if (!params->explicit_connect)
6239                         params->conn = hci_conn_get(conn);
6240
6241                 return conn;
6242         }
6243
6244         switch (PTR_ERR(conn)) {
6245         case -EBUSY:
6246                 /* If hci_connect() returns -EBUSY it means there is already
6247                  * an LE connection attempt going on. Since controllers don't
6248                  * support more than one connection attempt at the time, we
6249                  * don't consider this an error case.
6250                  */
6251                 break;
6252         default:
6253                 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
6254                 return NULL;
6255         }
6256
6257         return NULL;
6258 }
6259
6260 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6261                                u8 bdaddr_type, bdaddr_t *direct_addr,
6262                                u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
6263                                bool ext_adv, bool ctl_time, u64 instant)
6264 {
6265         struct discovery_state *d = &hdev->discovery;
6266         struct smp_irk *irk;
6267         struct hci_conn *conn;
6268         bool match, bdaddr_resolved;
6269         u32 flags;
6270         u8 *ptr;
6271
6272         switch (type) {
6273         case LE_ADV_IND:
6274         case LE_ADV_DIRECT_IND:
6275         case LE_ADV_SCAN_IND:
6276         case LE_ADV_NONCONN_IND:
6277         case LE_ADV_SCAN_RSP:
6278                 break;
6279         default:
6280                 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6281                                        "type: 0x%02x", type);
6282                 return;
6283         }
6284
6285         if (len > max_adv_len(hdev)) {
6286                 bt_dev_err_ratelimited(hdev,
6287                                        "adv larger than maximum supported");
6288                 return;
6289         }
6290
6291         /* Find the end of the data in case the report contains padded zero
6292          * bytes at the end causing an invalid length value.
6293          *
6294          * When data is NULL, len is 0 so there is no need for extra ptr
6295          * check as 'ptr < data + 0' is already false in such case.
6296          */
6297         for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6298                 if (ptr + 1 + *ptr > data + len)
6299                         break;
6300         }
6301
6302         /* Adjust for actual length. This handles the case when remote
6303          * device is advertising with incorrect data length.
6304          */
6305         len = ptr - data;
6306
6307         /* If the direct address is present, then this report is from
6308          * a LE Direct Advertising Report event. In that case it is
6309          * important to see if the address is matching the local
6310          * controller address.
6311          */
6312         if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6313                 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6314                                                   &bdaddr_resolved);
6315
6316                 /* Only resolvable random addresses are valid for these
6317                  * kind of reports and others can be ignored.
6318                  */
6319                 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6320                         return;
6321
6322                 /* If the controller is not using resolvable random
6323                  * addresses, then this report can be ignored.
6324                  */
6325                 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6326                         return;
6327
6328                 /* If the local IRK of the controller does not match
6329                  * with the resolvable random address provided, then
6330                  * this report can be ignored.
6331                  */
6332                 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6333                         return;
6334         }
6335
6336         /* Check if we need to convert to identity address */
6337         irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6338         if (irk) {
6339                 bdaddr = &irk->bdaddr;
6340                 bdaddr_type = irk->addr_type;
6341         }
6342
6343         bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6344
6345         /* Check if we have been requested to connect to this device.
6346          *
6347          * direct_addr is set only for directed advertising reports (it is NULL
6348          * for advertising reports) and is already verified to be RPA above.
6349          */
6350         conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6351                                      type);
6352         if (!ext_adv && conn && type == LE_ADV_IND &&
6353             len <= max_adv_len(hdev)) {
6354                 /* Store report for later inclusion by
6355                  * mgmt_device_connected
6356                  */
6357                 memcpy(conn->le_adv_data, data, len);
6358                 conn->le_adv_data_len = len;
6359         }
6360
6361         if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6362                 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6363         else
6364                 flags = 0;
6365
6366         /* All scan results should be sent up for Mesh systems */
6367         if (hci_dev_test_flag(hdev, HCI_MESH)) {
6368                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6369                                   rssi, flags, data, len, NULL, 0, instant);
6370                 return;
6371         }
6372
6373         /* Passive scanning shouldn't trigger any device found events,
6374          * except for devices marked as CONN_REPORT for which we do send
6375          * device found events, or advertisement monitoring requested.
6376          */
6377         if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6378                 if (type == LE_ADV_DIRECT_IND)
6379                         return;
6380
6381                 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6382                                                bdaddr, bdaddr_type) &&
6383                     idr_is_empty(&hdev->adv_monitors_idr))
6384                         return;
6385
6386                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6387                                   rssi, flags, data, len, NULL, 0, 0);
6388                 return;
6389         }
6390
6391         /* When receiving a scan response, then there is no way to
6392          * know if the remote device is connectable or not. However
6393          * since scan responses are merged with a previously seen
6394          * advertising report, the flags field from that report
6395          * will be used.
6396          *
6397          * In the unlikely case that a controller just sends a scan
6398          * response event that doesn't match the pending report, then
6399          * it is marked as a standalone SCAN_RSP.
6400          */
6401         if (type == LE_ADV_SCAN_RSP)
6402                 flags = MGMT_DEV_FOUND_SCAN_RSP;
6403
6404         /* If there's nothing pending either store the data from this
6405          * event or send an immediate device found event if the data
6406          * should not be stored for later.
6407          */
6408         if (!ext_adv && !has_pending_adv_report(hdev)) {
6409                 /* If the report will trigger a SCAN_REQ store it for
6410                  * later merging.
6411                  */
6412                 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6413                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6414                                                  rssi, flags, data, len);
6415                         return;
6416                 }
6417
6418                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6419                                   rssi, flags, data, len, NULL, 0, 0);
6420                 return;
6421         }
6422
6423         /* Check if the pending report is for the same device as the new one */
6424         match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6425                  bdaddr_type == d->last_adv_addr_type);
6426
6427         /* If the pending data doesn't match this report or this isn't a
6428          * scan response (e.g. we got a duplicate ADV_IND) then force
6429          * sending of the pending data.
6430          */
6431         if (type != LE_ADV_SCAN_RSP || !match) {
6432                 /* Send out whatever is in the cache, but skip duplicates */
6433                 if (!match)
6434                         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6435                                           d->last_adv_addr_type, NULL,
6436                                           d->last_adv_rssi, d->last_adv_flags,
6437                                           d->last_adv_data,
6438                                           d->last_adv_data_len, NULL, 0, 0);
6439
6440                 /* If the new report will trigger a SCAN_REQ store it for
6441                  * later merging.
6442                  */
6443                 if (!ext_adv && (type == LE_ADV_IND ||
6444                                  type == LE_ADV_SCAN_IND)) {
6445                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6446                                                  rssi, flags, data, len);
6447                         return;
6448                 }
6449
6450                 /* The advertising reports cannot be merged, so clear
6451                  * the pending report and send out a device found event.
6452                  */
6453                 clear_pending_adv_report(hdev);
6454                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6455                                   rssi, flags, data, len, NULL, 0, 0);
6456                 return;
6457         }
6458
6459         /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6460          * the new event is a SCAN_RSP. We can therefore proceed with
6461          * sending a merged device found event.
6462          */
6463         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6464                           d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6465                           d->last_adv_data, d->last_adv_data_len, data, len, 0);
6466         clear_pending_adv_report(hdev);
6467 }
6468
6469 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6470                                   struct sk_buff *skb)
6471 {
6472         struct hci_ev_le_advertising_report *ev = data;
6473         u64 instant = jiffies;
6474
6475         if (!ev->num)
6476                 return;
6477
6478         hci_dev_lock(hdev);
6479
6480         while (ev->num--) {
6481                 struct hci_ev_le_advertising_info *info;
6482                 s8 rssi;
6483
6484                 info = hci_le_ev_skb_pull(hdev, skb,
6485                                           HCI_EV_LE_ADVERTISING_REPORT,
6486                                           sizeof(*info));
6487                 if (!info)
6488                         break;
6489
6490                 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6491                                         info->length + 1))
6492                         break;
6493
6494                 if (info->length <= max_adv_len(hdev)) {
6495                         rssi = info->data[info->length];
6496                         process_adv_report(hdev, info->type, &info->bdaddr,
6497                                            info->bdaddr_type, NULL, 0, rssi,
6498                                            info->data, info->length, false,
6499                                            false, instant);
6500                 } else {
6501                         bt_dev_err(hdev, "Dropping invalid advertising data");
6502                 }
6503         }
6504
6505         hci_dev_unlock(hdev);
6506 }
6507
6508 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6509 {
6510         if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6511                 switch (evt_type) {
6512                 case LE_LEGACY_ADV_IND:
6513                         return LE_ADV_IND;
6514                 case LE_LEGACY_ADV_DIRECT_IND:
6515                         return LE_ADV_DIRECT_IND;
6516                 case LE_LEGACY_ADV_SCAN_IND:
6517                         return LE_ADV_SCAN_IND;
6518                 case LE_LEGACY_NONCONN_IND:
6519                         return LE_ADV_NONCONN_IND;
6520                 case LE_LEGACY_SCAN_RSP_ADV:
6521                 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6522                         return LE_ADV_SCAN_RSP;
6523                 }
6524
6525                 goto invalid;
6526         }
6527
6528         if (evt_type & LE_EXT_ADV_CONN_IND) {
6529                 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6530                         return LE_ADV_DIRECT_IND;
6531
6532                 return LE_ADV_IND;
6533         }
6534
6535         if (evt_type & LE_EXT_ADV_SCAN_RSP)
6536                 return LE_ADV_SCAN_RSP;
6537
6538         if (evt_type & LE_EXT_ADV_SCAN_IND)
6539                 return LE_ADV_SCAN_IND;
6540
6541         if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6542             evt_type & LE_EXT_ADV_DIRECT_IND)
6543                 return LE_ADV_NONCONN_IND;
6544
6545 invalid:
6546         bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6547                                evt_type);
6548
6549         return LE_ADV_INVALID;
6550 }
6551
6552 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6553                                       struct sk_buff *skb)
6554 {
6555         struct hci_ev_le_ext_adv_report *ev = data;
6556         u64 instant = jiffies;
6557
6558         if (!ev->num)
6559                 return;
6560
6561         hci_dev_lock(hdev);
6562
6563         while (ev->num--) {
6564                 struct hci_ev_le_ext_adv_info *info;
6565                 u8 legacy_evt_type;
6566                 u16 evt_type;
6567
6568                 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6569                                           sizeof(*info));
6570                 if (!info)
6571                         break;
6572
6573                 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6574                                         info->length))
6575                         break;
6576
6577                 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6578                 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6579                 if (legacy_evt_type != LE_ADV_INVALID) {
6580                         process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6581                                            info->bdaddr_type, NULL, 0,
6582                                            info->rssi, info->data, info->length,
6583                                            !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6584                                            false, instant);
6585                 }
6586         }
6587
6588         hci_dev_unlock(hdev);
6589 }
6590
6591 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6592 {
6593         struct hci_cp_le_pa_term_sync cp;
6594
6595         memset(&cp, 0, sizeof(cp));
6596         cp.handle = handle;
6597
6598         return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6599 }
6600
6601 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6602                                             struct sk_buff *skb)
6603 {
6604         struct hci_ev_le_pa_sync_established *ev = data;
6605         int mask = hdev->link_mode;
6606         __u8 flags = 0;
6607         struct hci_conn *pa_sync;
6608
6609         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6610
6611         hci_dev_lock(hdev);
6612
6613         hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6614
6615         mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6616         if (!(mask & HCI_LM_ACCEPT)) {
6617                 hci_le_pa_term_sync(hdev, ev->handle);
6618                 goto unlock;
6619         }
6620
6621         if (!(flags & HCI_PROTO_DEFER))
6622                 goto unlock;
6623
6624         if (ev->status) {
6625                 /* Add connection to indicate the failed PA sync event */
6626                 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6627                                              HCI_ROLE_SLAVE);
6628
6629                 if (!pa_sync)
6630                         goto unlock;
6631
6632                 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6633
6634                 /* Notify iso layer */
6635                 hci_connect_cfm(pa_sync, ev->status);
6636         }
6637
6638 unlock:
6639         hci_dev_unlock(hdev);
6640 }
6641
6642 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6643                                       struct sk_buff *skb)
6644 {
6645         struct hci_ev_le_per_adv_report *ev = data;
6646         int mask = hdev->link_mode;
6647         __u8 flags = 0;
6648
6649         bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6650
6651         hci_dev_lock(hdev);
6652
6653         mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6654         if (!(mask & HCI_LM_ACCEPT))
6655                 hci_le_pa_term_sync(hdev, ev->sync_handle);
6656
6657         hci_dev_unlock(hdev);
6658 }
6659
6660 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6661                                             struct sk_buff *skb)
6662 {
6663         struct hci_ev_le_remote_feat_complete *ev = data;
6664         struct hci_conn *conn;
6665
6666         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6667
6668         hci_dev_lock(hdev);
6669
6670         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6671         if (conn) {
6672                 if (!ev->status)
6673                         memcpy(conn->features[0], ev->features, 8);
6674
6675                 if (conn->state == BT_CONFIG) {
6676                         __u8 status;
6677
6678                         /* If the local controller supports peripheral-initiated
6679                          * features exchange, but the remote controller does
6680                          * not, then it is possible that the error code 0x1a
6681                          * for unsupported remote feature gets returned.
6682                          *
6683                          * In this specific case, allow the connection to
6684                          * transition into connected state and mark it as
6685                          * successful.
6686                          */
6687                         if (!conn->out && ev->status == 0x1a &&
6688                             (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6689                                 status = 0x00;
6690                         else
6691                                 status = ev->status;
6692
6693                         conn->state = BT_CONNECTED;
6694                         hci_connect_cfm(conn, status);
6695                         hci_conn_drop(conn);
6696                 }
6697         }
6698
6699         hci_dev_unlock(hdev);
6700 }
6701
6702 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6703                                    struct sk_buff *skb)
6704 {
6705         struct hci_ev_le_ltk_req *ev = data;
6706         struct hci_cp_le_ltk_reply cp;
6707         struct hci_cp_le_ltk_neg_reply neg;
6708         struct hci_conn *conn;
6709         struct smp_ltk *ltk;
6710
6711         bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6712
6713         hci_dev_lock(hdev);
6714
6715         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6716         if (conn == NULL)
6717                 goto not_found;
6718
6719         ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6720         if (!ltk)
6721                 goto not_found;
6722
6723         if (smp_ltk_is_sc(ltk)) {
6724                 /* With SC both EDiv and Rand are set to zero */
6725                 if (ev->ediv || ev->rand)
6726                         goto not_found;
6727         } else {
6728                 /* For non-SC keys check that EDiv and Rand match */
6729                 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6730                         goto not_found;
6731         }
6732
6733         memcpy(cp.ltk, ltk->val, ltk->enc_size);
6734         memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6735         cp.handle = cpu_to_le16(conn->handle);
6736
6737         conn->pending_sec_level = smp_ltk_sec_level(ltk);
6738
6739         conn->enc_key_size = ltk->enc_size;
6740
6741         hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6742
6743         /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6744          * temporary key used to encrypt a connection following
6745          * pairing. It is used during the Encrypted Session Setup to
6746          * distribute the keys. Later, security can be re-established
6747          * using a distributed LTK.
6748          */
6749         if (ltk->type == SMP_STK) {
6750                 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6751                 list_del_rcu(&ltk->list);
6752                 kfree_rcu(ltk, rcu);
6753         } else {
6754                 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6755         }
6756
6757         hci_dev_unlock(hdev);
6758
6759         return;
6760
6761 not_found:
6762         neg.handle = ev->handle;
6763         hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6764         hci_dev_unlock(hdev);
6765 }
6766
6767 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6768                                       u8 reason)
6769 {
6770         struct hci_cp_le_conn_param_req_neg_reply cp;
6771
6772         cp.handle = cpu_to_le16(handle);
6773         cp.reason = reason;
6774
6775         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6776                      &cp);
6777 }
6778
6779 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6780                                              struct sk_buff *skb)
6781 {
6782         struct hci_ev_le_remote_conn_param_req *ev = data;
6783         struct hci_cp_le_conn_param_req_reply cp;
6784         struct hci_conn *hcon;
6785         u16 handle, min, max, latency, timeout;
6786
6787         bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6788
6789         handle = le16_to_cpu(ev->handle);
6790         min = le16_to_cpu(ev->interval_min);
6791         max = le16_to_cpu(ev->interval_max);
6792         latency = le16_to_cpu(ev->latency);
6793         timeout = le16_to_cpu(ev->timeout);
6794
6795         hcon = hci_conn_hash_lookup_handle(hdev, handle);
6796         if (!hcon || hcon->state != BT_CONNECTED)
6797                 return send_conn_param_neg_reply(hdev, handle,
6798                                                  HCI_ERROR_UNKNOWN_CONN_ID);
6799
6800         if (hci_check_conn_params(min, max, latency, timeout))
6801                 return send_conn_param_neg_reply(hdev, handle,
6802                                                  HCI_ERROR_INVALID_LL_PARAMS);
6803
6804         if (hcon->role == HCI_ROLE_MASTER) {
6805                 struct hci_conn_params *params;
6806                 u8 store_hint;
6807
6808                 hci_dev_lock(hdev);
6809
6810                 params = hci_conn_params_lookup(hdev, &hcon->dst,
6811                                                 hcon->dst_type);
6812                 if (params) {
6813                         params->conn_min_interval = min;
6814                         params->conn_max_interval = max;
6815                         params->conn_latency = latency;
6816                         params->supervision_timeout = timeout;
6817                         store_hint = 0x01;
6818                 } else {
6819                         store_hint = 0x00;
6820                 }
6821
6822                 hci_dev_unlock(hdev);
6823
6824                 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6825                                     store_hint, min, max, latency, timeout);
6826         }
6827
6828         cp.handle = ev->handle;
6829         cp.interval_min = ev->interval_min;
6830         cp.interval_max = ev->interval_max;
6831         cp.latency = ev->latency;
6832         cp.timeout = ev->timeout;
6833         cp.min_ce_len = 0;
6834         cp.max_ce_len = 0;
6835
6836         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6837 }
6838
6839 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6840                                          struct sk_buff *skb)
6841 {
6842         struct hci_ev_le_direct_adv_report *ev = data;
6843         u64 instant = jiffies;
6844         int i;
6845
6846         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6847                                 flex_array_size(ev, info, ev->num)))
6848                 return;
6849
6850         if (!ev->num)
6851                 return;
6852
6853         hci_dev_lock(hdev);
6854
6855         for (i = 0; i < ev->num; i++) {
6856                 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6857
6858                 process_adv_report(hdev, info->type, &info->bdaddr,
6859                                    info->bdaddr_type, &info->direct_addr,
6860                                    info->direct_addr_type, info->rssi, NULL, 0,
6861                                    false, false, instant);
6862         }
6863
6864         hci_dev_unlock(hdev);
6865 }
6866
6867 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6868                                   struct sk_buff *skb)
6869 {
6870         struct hci_ev_le_phy_update_complete *ev = data;
6871         struct hci_conn *conn;
6872
6873         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6874
6875         if (ev->status)
6876                 return;
6877
6878         hci_dev_lock(hdev);
6879
6880         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6881         if (!conn)
6882                 goto unlock;
6883
6884         conn->le_tx_phy = ev->tx_phy;
6885         conn->le_rx_phy = ev->rx_phy;
6886
6887 unlock:
6888         hci_dev_unlock(hdev);
6889 }
6890
6891 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6892                                         struct sk_buff *skb)
6893 {
6894         struct hci_evt_le_cis_established *ev = data;
6895         struct hci_conn *conn;
6896         struct bt_iso_qos *qos;
6897         bool pending = false;
6898         u16 handle = __le16_to_cpu(ev->handle);
6899
6900         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6901
6902         hci_dev_lock(hdev);
6903
6904         conn = hci_conn_hash_lookup_handle(hdev, handle);
6905         if (!conn) {
6906                 bt_dev_err(hdev,
6907                            "Unable to find connection with handle 0x%4.4x",
6908                            handle);
6909                 goto unlock;
6910         }
6911
6912         if (conn->type != ISO_LINK) {
6913                 bt_dev_err(hdev,
6914                            "Invalid connection link type handle 0x%4.4x",
6915                            handle);
6916                 goto unlock;
6917         }
6918
6919         qos = &conn->iso_qos;
6920
6921         pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6922
6923         /* Convert ISO Interval (1.25 ms slots) to SDU Interval (us) */
6924         qos->ucast.in.interval = le16_to_cpu(ev->interval) * 1250;
6925         qos->ucast.out.interval = qos->ucast.in.interval;
6926
6927         switch (conn->role) {
6928         case HCI_ROLE_SLAVE:
6929                 /* Convert Transport Latency (us) to Latency (msec) */
6930                 qos->ucast.in.latency =
6931                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6932                                           1000);
6933                 qos->ucast.out.latency =
6934                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6935                                           1000);
6936                 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6937                 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6938                 qos->ucast.in.phy = ev->c_phy;
6939                 qos->ucast.out.phy = ev->p_phy;
6940                 break;
6941         case HCI_ROLE_MASTER:
6942                 /* Convert Transport Latency (us) to Latency (msec) */
6943                 qos->ucast.out.latency =
6944                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6945                                           1000);
6946                 qos->ucast.in.latency =
6947                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6948                                           1000);
6949                 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6950                 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6951                 qos->ucast.out.phy = ev->c_phy;
6952                 qos->ucast.in.phy = ev->p_phy;
6953                 break;
6954         }
6955
6956         if (!ev->status) {
6957                 conn->state = BT_CONNECTED;
6958                 hci_debugfs_create_conn(conn);
6959                 hci_conn_add_sysfs(conn);
6960                 hci_iso_setup_path(conn);
6961                 goto unlock;
6962         }
6963
6964         conn->state = BT_CLOSED;
6965         hci_connect_cfm(conn, ev->status);
6966         hci_conn_del(conn);
6967
6968 unlock:
6969         if (pending)
6970                 hci_le_create_cis_pending(hdev);
6971
6972         hci_dev_unlock(hdev);
6973 }
6974
6975 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6976 {
6977         struct hci_cp_le_reject_cis cp;
6978
6979         memset(&cp, 0, sizeof(cp));
6980         cp.handle = handle;
6981         cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6982         hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6983 }
6984
6985 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6986 {
6987         struct hci_cp_le_accept_cis cp;
6988
6989         memset(&cp, 0, sizeof(cp));
6990         cp.handle = handle;
6991         hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6992 }
6993
6994 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6995                                struct sk_buff *skb)
6996 {
6997         struct hci_evt_le_cis_req *ev = data;
6998         u16 acl_handle, cis_handle;
6999         struct hci_conn *acl, *cis;
7000         int mask;
7001         __u8 flags = 0;
7002
7003         acl_handle = __le16_to_cpu(ev->acl_handle);
7004         cis_handle = __le16_to_cpu(ev->cis_handle);
7005
7006         bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
7007                    acl_handle, cis_handle, ev->cig_id, ev->cis_id);
7008
7009         hci_dev_lock(hdev);
7010
7011         acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
7012         if (!acl)
7013                 goto unlock;
7014
7015         mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
7016         if (!(mask & HCI_LM_ACCEPT)) {
7017                 hci_le_reject_cis(hdev, ev->cis_handle);
7018                 goto unlock;
7019         }
7020
7021         cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
7022         if (!cis) {
7023                 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
7024                                    cis_handle);
7025                 if (!cis) {
7026                         hci_le_reject_cis(hdev, ev->cis_handle);
7027                         goto unlock;
7028                 }
7029         }
7030
7031         cis->iso_qos.ucast.cig = ev->cig_id;
7032         cis->iso_qos.ucast.cis = ev->cis_id;
7033
7034         if (!(flags & HCI_PROTO_DEFER)) {
7035                 hci_le_accept_cis(hdev, ev->cis_handle);
7036         } else {
7037                 cis->state = BT_CONNECT2;
7038                 hci_connect_cfm(cis, 0);
7039         }
7040
7041 unlock:
7042         hci_dev_unlock(hdev);
7043 }
7044
7045 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
7046 {
7047         u8 handle = PTR_UINT(data);
7048
7049         return hci_le_terminate_big_sync(hdev, handle,
7050                                          HCI_ERROR_LOCAL_HOST_TERM);
7051 }
7052
7053 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
7054                                            struct sk_buff *skb)
7055 {
7056         struct hci_evt_le_create_big_complete *ev = data;
7057         struct hci_conn *conn;
7058         __u8 i = 0;
7059
7060         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
7061
7062         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
7063                                 flex_array_size(ev, bis_handle, ev->num_bis)))
7064                 return;
7065
7066         hci_dev_lock(hdev);
7067         rcu_read_lock();
7068
7069         /* Connect all BISes that are bound to the BIG */
7070         list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7071                 if (bacmp(&conn->dst, BDADDR_ANY) ||
7072                     conn->type != ISO_LINK ||
7073                     conn->iso_qos.bcast.big != ev->handle)
7074                         continue;
7075
7076                 if (hci_conn_set_handle(conn,
7077                                         __le16_to_cpu(ev->bis_handle[i++])))
7078                         continue;
7079
7080                 if (!ev->status) {
7081                         conn->state = BT_CONNECTED;
7082                         set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
7083                         rcu_read_unlock();
7084                         hci_debugfs_create_conn(conn);
7085                         hci_conn_add_sysfs(conn);
7086                         hci_iso_setup_path(conn);
7087                         rcu_read_lock();
7088                         continue;
7089                 }
7090
7091                 hci_connect_cfm(conn, ev->status);
7092                 rcu_read_unlock();
7093                 hci_conn_del(conn);
7094                 rcu_read_lock();
7095         }
7096
7097         rcu_read_unlock();
7098
7099         if (!ev->status && !i)
7100                 /* If no BISes have been connected for the BIG,
7101                  * terminate. This is in case all bound connections
7102                  * have been closed before the BIG creation
7103                  * has completed.
7104                  */
7105                 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
7106                                    UINT_PTR(ev->handle), NULL);
7107
7108         hci_dev_unlock(hdev);
7109 }
7110
7111 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
7112                                             struct sk_buff *skb)
7113 {
7114         struct hci_evt_le_big_sync_estabilished *ev = data;
7115         struct hci_conn *bis;
7116         int i;
7117
7118         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
7119
7120         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7121                                 flex_array_size(ev, bis, ev->num_bis)))
7122                 return;
7123
7124         hci_dev_lock(hdev);
7125
7126         for (i = 0; i < ev->num_bis; i++) {
7127                 u16 handle = le16_to_cpu(ev->bis[i]);
7128                 __le32 interval;
7129
7130                 bis = hci_conn_hash_lookup_handle(hdev, handle);
7131                 if (!bis) {
7132                         bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
7133                                            HCI_ROLE_SLAVE, handle);
7134                         if (!bis)
7135                                 continue;
7136                 }
7137
7138                 if (ev->status != 0x42)
7139                         /* Mark PA sync as established */
7140                         set_bit(HCI_CONN_PA_SYNC, &bis->flags);
7141
7142                 bis->iso_qos.bcast.big = ev->handle;
7143                 memset(&interval, 0, sizeof(interval));
7144                 memcpy(&interval, ev->latency, sizeof(ev->latency));
7145                 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
7146                 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
7147                 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
7148                 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
7149
7150                 if (!ev->status) {
7151                         set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
7152                         hci_iso_setup_path(bis);
7153                 }
7154         }
7155
7156         /* In case BIG sync failed, notify each failed connection to
7157          * the user after all hci connections have been added
7158          */
7159         if (ev->status)
7160                 for (i = 0; i < ev->num_bis; i++) {
7161                         u16 handle = le16_to_cpu(ev->bis[i]);
7162
7163                         bis = hci_conn_hash_lookup_handle(hdev, handle);
7164
7165                         set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
7166                         hci_connect_cfm(bis, ev->status);
7167                 }
7168
7169         hci_dev_unlock(hdev);
7170 }
7171
7172 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7173                                            struct sk_buff *skb)
7174 {
7175         struct hci_evt_le_big_info_adv_report *ev = data;
7176         int mask = hdev->link_mode;
7177         __u8 flags = 0;
7178         struct hci_conn *pa_sync;
7179
7180         bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7181
7182         hci_dev_lock(hdev);
7183
7184         mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
7185         if (!(mask & HCI_LM_ACCEPT)) {
7186                 hci_le_pa_term_sync(hdev, ev->sync_handle);
7187                 goto unlock;
7188         }
7189
7190         if (!(flags & HCI_PROTO_DEFER))
7191                 goto unlock;
7192
7193         pa_sync = hci_conn_hash_lookup_pa_sync_handle
7194                         (hdev,
7195                         le16_to_cpu(ev->sync_handle));
7196
7197         if (pa_sync)
7198                 goto unlock;
7199
7200         /* Add connection to indicate the PA sync event */
7201         pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
7202                                      HCI_ROLE_SLAVE);
7203
7204         if (!pa_sync)
7205                 goto unlock;
7206
7207         pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
7208         set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
7209
7210         /* Notify iso layer */
7211         hci_connect_cfm(pa_sync, 0x00);
7212
7213 unlock:
7214         hci_dev_unlock(hdev);
7215 }
7216
7217 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7218 [_op] = { \
7219         .func = _func, \
7220         .min_len = _min_len, \
7221         .max_len = _max_len, \
7222 }
7223
7224 #define HCI_LE_EV(_op, _func, _len) \
7225         HCI_LE_EV_VL(_op, _func, _len, _len)
7226
7227 #define HCI_LE_EV_STATUS(_op, _func) \
7228         HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7229
7230 /* Entries in this table shall have their position according to the subevent
7231  * opcode they handle so the use of the macros above is recommend since it does
7232  * attempt to initialize at its proper index using Designated Initializers that
7233  * way events without a callback function can be ommited.
7234  */
7235 static const struct hci_le_ev {
7236         void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7237         u16  min_len;
7238         u16  max_len;
7239 } hci_le_ev_table[U8_MAX + 1] = {
7240         /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7241         HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7242                   sizeof(struct hci_ev_le_conn_complete)),
7243         /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7244         HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7245                      sizeof(struct hci_ev_le_advertising_report),
7246                      HCI_MAX_EVENT_SIZE),
7247         /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7248         HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7249                   hci_le_conn_update_complete_evt,
7250                   sizeof(struct hci_ev_le_conn_update_complete)),
7251         /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7252         HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7253                   hci_le_remote_feat_complete_evt,
7254                   sizeof(struct hci_ev_le_remote_feat_complete)),
7255         /* [0x05 = HCI_EV_LE_LTK_REQ] */
7256         HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7257                   sizeof(struct hci_ev_le_ltk_req)),
7258         /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7259         HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7260                   hci_le_remote_conn_param_req_evt,
7261                   sizeof(struct hci_ev_le_remote_conn_param_req)),
7262         /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7263         HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7264                   hci_le_enh_conn_complete_evt,
7265                   sizeof(struct hci_ev_le_enh_conn_complete)),
7266         /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7267         HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7268                      sizeof(struct hci_ev_le_direct_adv_report),
7269                      HCI_MAX_EVENT_SIZE),
7270         /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7271         HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7272                   sizeof(struct hci_ev_le_phy_update_complete)),
7273         /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7274         HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7275                      sizeof(struct hci_ev_le_ext_adv_report),
7276                      HCI_MAX_EVENT_SIZE),
7277         /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7278         HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7279                   hci_le_pa_sync_estabilished_evt,
7280                   sizeof(struct hci_ev_le_pa_sync_established)),
7281         /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7282         HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7283                                  hci_le_per_adv_report_evt,
7284                                  sizeof(struct hci_ev_le_per_adv_report),
7285                                  HCI_MAX_EVENT_SIZE),
7286         /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7287         HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7288                   sizeof(struct hci_evt_le_ext_adv_set_term)),
7289         /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7290         HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7291                   sizeof(struct hci_evt_le_cis_established)),
7292         /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7293         HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7294                   sizeof(struct hci_evt_le_cis_req)),
7295         /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7296         HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7297                      hci_le_create_big_complete_evt,
7298                      sizeof(struct hci_evt_le_create_big_complete),
7299                      HCI_MAX_EVENT_SIZE),
7300         /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7301         HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7302                      hci_le_big_sync_established_evt,
7303                      sizeof(struct hci_evt_le_big_sync_estabilished),
7304                      HCI_MAX_EVENT_SIZE),
7305         /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7306         HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7307                      hci_le_big_info_adv_report_evt,
7308                      sizeof(struct hci_evt_le_big_info_adv_report),
7309                      HCI_MAX_EVENT_SIZE),
7310 };
7311
7312 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7313                             struct sk_buff *skb, u16 *opcode, u8 *status,
7314                             hci_req_complete_t *req_complete,
7315                             hci_req_complete_skb_t *req_complete_skb)
7316 {
7317         struct hci_ev_le_meta *ev = data;
7318         const struct hci_le_ev *subev;
7319
7320         bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7321
7322         /* Only match event if command OGF is for LE */
7323         if (hdev->sent_cmd &&
7324             hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) == 0x08 &&
7325             hci_skb_event(hdev->sent_cmd) == ev->subevent) {
7326                 *opcode = hci_skb_opcode(hdev->sent_cmd);
7327                 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7328                                      req_complete_skb);
7329         }
7330
7331         subev = &hci_le_ev_table[ev->subevent];
7332         if (!subev->func)
7333                 return;
7334
7335         if (skb->len < subev->min_len) {
7336                 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7337                            ev->subevent, skb->len, subev->min_len);
7338                 return;
7339         }
7340
7341         /* Just warn if the length is over max_len size it still be
7342          * possible to partially parse the event so leave to callback to
7343          * decide if that is acceptable.
7344          */
7345         if (skb->len > subev->max_len)
7346                 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7347                             ev->subevent, skb->len, subev->max_len);
7348         data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7349         if (!data)
7350                 return;
7351
7352         subev->func(hdev, data, skb);
7353 }
7354
7355 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7356                                  u8 event, struct sk_buff *skb)
7357 {
7358         struct hci_ev_cmd_complete *ev;
7359         struct hci_event_hdr *hdr;
7360
7361         if (!skb)
7362                 return false;
7363
7364         hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7365         if (!hdr)
7366                 return false;
7367
7368         if (event) {
7369                 if (hdr->evt != event)
7370                         return false;
7371                 return true;
7372         }
7373
7374         /* Check if request ended in Command Status - no way to retrieve
7375          * any extra parameters in this case.
7376          */
7377         if (hdr->evt == HCI_EV_CMD_STATUS)
7378                 return false;
7379
7380         if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7381                 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7382                            hdr->evt);
7383                 return false;
7384         }
7385
7386         ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7387         if (!ev)
7388                 return false;
7389
7390         if (opcode != __le16_to_cpu(ev->opcode)) {
7391                 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7392                        __le16_to_cpu(ev->opcode));
7393                 return false;
7394         }
7395
7396         return true;
7397 }
7398
7399 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7400                                   struct sk_buff *skb)
7401 {
7402         struct hci_ev_le_advertising_info *adv;
7403         struct hci_ev_le_direct_adv_info *direct_adv;
7404         struct hci_ev_le_ext_adv_info *ext_adv;
7405         const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7406         const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7407
7408         hci_dev_lock(hdev);
7409
7410         /* If we are currently suspended and this is the first BT event seen,
7411          * save the wake reason associated with the event.
7412          */
7413         if (!hdev->suspended || hdev->wake_reason)
7414                 goto unlock;
7415
7416         /* Default to remote wake. Values for wake_reason are documented in the
7417          * Bluez mgmt api docs.
7418          */
7419         hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7420
7421         /* Once configured for remote wakeup, we should only wake up for
7422          * reconnections. It's useful to see which device is waking us up so
7423          * keep track of the bdaddr of the connection event that woke us up.
7424          */
7425         if (event == HCI_EV_CONN_REQUEST) {
7426                 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7427                 hdev->wake_addr_type = BDADDR_BREDR;
7428         } else if (event == HCI_EV_CONN_COMPLETE) {
7429                 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7430                 hdev->wake_addr_type = BDADDR_BREDR;
7431         } else if (event == HCI_EV_LE_META) {
7432                 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7433                 u8 subevent = le_ev->subevent;
7434                 u8 *ptr = &skb->data[sizeof(*le_ev)];
7435                 u8 num_reports = *ptr;
7436
7437                 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7438                      subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7439                      subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7440                     num_reports) {
7441                         adv = (void *)(ptr + 1);
7442                         direct_adv = (void *)(ptr + 1);
7443                         ext_adv = (void *)(ptr + 1);
7444
7445                         switch (subevent) {
7446                         case HCI_EV_LE_ADVERTISING_REPORT:
7447                                 bacpy(&hdev->wake_addr, &adv->bdaddr);
7448                                 hdev->wake_addr_type = adv->bdaddr_type;
7449                                 break;
7450                         case HCI_EV_LE_DIRECT_ADV_REPORT:
7451                                 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7452                                 hdev->wake_addr_type = direct_adv->bdaddr_type;
7453                                 break;
7454                         case HCI_EV_LE_EXT_ADV_REPORT:
7455                                 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7456                                 hdev->wake_addr_type = ext_adv->bdaddr_type;
7457                                 break;
7458                         }
7459                 }
7460         } else {
7461                 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7462         }
7463
7464 unlock:
7465         hci_dev_unlock(hdev);
7466 }
7467
7468 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7469 [_op] = { \
7470         .req = false, \
7471         .func = _func, \
7472         .min_len = _min_len, \
7473         .max_len = _max_len, \
7474 }
7475
7476 #define HCI_EV(_op, _func, _len) \
7477         HCI_EV_VL(_op, _func, _len, _len)
7478
7479 #define HCI_EV_STATUS(_op, _func) \
7480         HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7481
7482 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7483 [_op] = { \
7484         .req = true, \
7485         .func_req = _func, \
7486         .min_len = _min_len, \
7487         .max_len = _max_len, \
7488 }
7489
7490 #define HCI_EV_REQ(_op, _func, _len) \
7491         HCI_EV_REQ_VL(_op, _func, _len, _len)
7492
7493 /* Entries in this table shall have their position according to the event opcode
7494  * they handle so the use of the macros above is recommend since it does attempt
7495  * to initialize at its proper index using Designated Initializers that way
7496  * events without a callback function don't have entered.
7497  */
7498 static const struct hci_ev {
7499         bool req;
7500         union {
7501                 void (*func)(struct hci_dev *hdev, void *data,
7502                              struct sk_buff *skb);
7503                 void (*func_req)(struct hci_dev *hdev, void *data,
7504                                  struct sk_buff *skb, u16 *opcode, u8 *status,
7505                                  hci_req_complete_t *req_complete,
7506                                  hci_req_complete_skb_t *req_complete_skb);
7507         };
7508         u16  min_len;
7509         u16  max_len;
7510 } hci_ev_table[U8_MAX + 1] = {
7511         /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7512         HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7513         /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7514         HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7515                   sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7516         /* [0x03 = HCI_EV_CONN_COMPLETE] */
7517         HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7518                sizeof(struct hci_ev_conn_complete)),
7519         /* [0x04 = HCI_EV_CONN_REQUEST] */
7520         HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7521                sizeof(struct hci_ev_conn_request)),
7522         /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7523         HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7524                sizeof(struct hci_ev_disconn_complete)),
7525         /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7526         HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7527                sizeof(struct hci_ev_auth_complete)),
7528         /* [0x07 = HCI_EV_REMOTE_NAME] */
7529         HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7530                sizeof(struct hci_ev_remote_name)),
7531         /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7532         HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7533                sizeof(struct hci_ev_encrypt_change)),
7534         /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7535         HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7536                hci_change_link_key_complete_evt,
7537                sizeof(struct hci_ev_change_link_key_complete)),
7538         /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7539         HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7540                sizeof(struct hci_ev_remote_features)),
7541         /* [0x0e = HCI_EV_CMD_COMPLETE] */
7542         HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7543                       sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7544         /* [0x0f = HCI_EV_CMD_STATUS] */
7545         HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7546                    sizeof(struct hci_ev_cmd_status)),
7547         /* [0x10 = HCI_EV_CMD_STATUS] */
7548         HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7549                sizeof(struct hci_ev_hardware_error)),
7550         /* [0x12 = HCI_EV_ROLE_CHANGE] */
7551         HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7552                sizeof(struct hci_ev_role_change)),
7553         /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7554         HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7555                   sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7556         /* [0x14 = HCI_EV_MODE_CHANGE] */
7557         HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7558                sizeof(struct hci_ev_mode_change)),
7559         /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7560         HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7561                sizeof(struct hci_ev_pin_code_req)),
7562         /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7563         HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7564                sizeof(struct hci_ev_link_key_req)),
7565         /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7566         HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7567                sizeof(struct hci_ev_link_key_notify)),
7568         /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7569         HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7570                sizeof(struct hci_ev_clock_offset)),
7571         /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7572         HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7573                sizeof(struct hci_ev_pkt_type_change)),
7574         /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7575         HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7576                sizeof(struct hci_ev_pscan_rep_mode)),
7577         /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7578         HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7579                   hci_inquiry_result_with_rssi_evt,
7580                   sizeof(struct hci_ev_inquiry_result_rssi),
7581                   HCI_MAX_EVENT_SIZE),
7582         /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7583         HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7584                sizeof(struct hci_ev_remote_ext_features)),
7585         /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7586         HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7587                sizeof(struct hci_ev_sync_conn_complete)),
7588         /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7589         HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7590                   hci_extended_inquiry_result_evt,
7591                   sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7592         /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7593         HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7594                sizeof(struct hci_ev_key_refresh_complete)),
7595         /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7596         HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7597                sizeof(struct hci_ev_io_capa_request)),
7598         /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7599         HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7600                sizeof(struct hci_ev_io_capa_reply)),
7601         /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7602         HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7603                sizeof(struct hci_ev_user_confirm_req)),
7604         /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7605         HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7606                sizeof(struct hci_ev_user_passkey_req)),
7607         /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7608         HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7609                sizeof(struct hci_ev_remote_oob_data_request)),
7610         /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7611         HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7612                sizeof(struct hci_ev_simple_pair_complete)),
7613         /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7614         HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7615                sizeof(struct hci_ev_user_passkey_notify)),
7616         /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7617         HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7618                sizeof(struct hci_ev_keypress_notify)),
7619         /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7620         HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7621                sizeof(struct hci_ev_remote_host_features)),
7622         /* [0x3e = HCI_EV_LE_META] */
7623         HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7624                       sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7625 #if IS_ENABLED(CONFIG_BT_HS)
7626         /* [0x40 = HCI_EV_PHY_LINK_COMPLETE] */
7627         HCI_EV(HCI_EV_PHY_LINK_COMPLETE, hci_phy_link_complete_evt,
7628                sizeof(struct hci_ev_phy_link_complete)),
7629         /* [0x41 = HCI_EV_CHANNEL_SELECTED] */
7630         HCI_EV(HCI_EV_CHANNEL_SELECTED, hci_chan_selected_evt,
7631                sizeof(struct hci_ev_channel_selected)),
7632         /* [0x42 = HCI_EV_DISCONN_PHY_LINK_COMPLETE] */
7633         HCI_EV(HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE,
7634                hci_disconn_loglink_complete_evt,
7635                sizeof(struct hci_ev_disconn_logical_link_complete)),
7636         /* [0x45 = HCI_EV_LOGICAL_LINK_COMPLETE] */
7637         HCI_EV(HCI_EV_LOGICAL_LINK_COMPLETE, hci_loglink_complete_evt,
7638                sizeof(struct hci_ev_logical_link_complete)),
7639         /* [0x46 = HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE] */
7640         HCI_EV(HCI_EV_DISCONN_PHY_LINK_COMPLETE,
7641                hci_disconn_phylink_complete_evt,
7642                sizeof(struct hci_ev_disconn_phy_link_complete)),
7643 #endif
7644         /* [0x48 = HCI_EV_NUM_COMP_BLOCKS] */
7645         HCI_EV(HCI_EV_NUM_COMP_BLOCKS, hci_num_comp_blocks_evt,
7646                sizeof(struct hci_ev_num_comp_blocks)),
7647         /* [0xff = HCI_EV_VENDOR] */
7648         HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7649 };
7650
7651 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7652                            u16 *opcode, u8 *status,
7653                            hci_req_complete_t *req_complete,
7654                            hci_req_complete_skb_t *req_complete_skb)
7655 {
7656         const struct hci_ev *ev = &hci_ev_table[event];
7657         void *data;
7658
7659         if (!ev->func)
7660                 return;
7661
7662         if (skb->len < ev->min_len) {
7663                 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7664                            event, skb->len, ev->min_len);
7665                 return;
7666         }
7667
7668         /* Just warn if the length is over max_len size it still be
7669          * possible to partially parse the event so leave to callback to
7670          * decide if that is acceptable.
7671          */
7672         if (skb->len > ev->max_len)
7673                 bt_dev_warn_ratelimited(hdev,
7674                                         "unexpected event 0x%2.2x length: %u > %u",
7675                                         event, skb->len, ev->max_len);
7676
7677         data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7678         if (!data)
7679                 return;
7680
7681         if (ev->req)
7682                 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7683                              req_complete_skb);
7684         else
7685                 ev->func(hdev, data, skb);
7686 }
7687
7688 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7689 {
7690         struct hci_event_hdr *hdr = (void *) skb->data;
7691         hci_req_complete_t req_complete = NULL;
7692         hci_req_complete_skb_t req_complete_skb = NULL;
7693         struct sk_buff *orig_skb = NULL;
7694         u8 status = 0, event, req_evt = 0;
7695         u16 opcode = HCI_OP_NOP;
7696
7697         if (skb->len < sizeof(*hdr)) {
7698                 bt_dev_err(hdev, "Malformed HCI Event");
7699                 goto done;
7700         }
7701
7702         kfree_skb(hdev->recv_event);
7703         hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7704
7705         event = hdr->evt;
7706         if (!event) {
7707                 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7708                             event);
7709                 goto done;
7710         }
7711
7712         /* Only match event if command OGF is not for LE */
7713         if (hdev->sent_cmd &&
7714             hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) != 0x08 &&
7715             hci_skb_event(hdev->sent_cmd) == event) {
7716                 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->sent_cmd),
7717                                      status, &req_complete, &req_complete_skb);
7718                 req_evt = event;
7719         }
7720
7721         /* If it looks like we might end up having to call
7722          * req_complete_skb, store a pristine copy of the skb since the
7723          * various handlers may modify the original one through
7724          * skb_pull() calls, etc.
7725          */
7726         if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7727             event == HCI_EV_CMD_COMPLETE)
7728                 orig_skb = skb_clone(skb, GFP_KERNEL);
7729
7730         skb_pull(skb, HCI_EVENT_HDR_SIZE);
7731
7732         /* Store wake reason if we're suspended */
7733         hci_store_wake_reason(hdev, event, skb);
7734
7735         bt_dev_dbg(hdev, "event 0x%2.2x", event);
7736
7737         hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7738                        &req_complete_skb);
7739
7740         if (req_complete) {
7741                 req_complete(hdev, status, opcode);
7742         } else if (req_complete_skb) {
7743                 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7744                         kfree_skb(orig_skb);
7745                         orig_skb = NULL;
7746                 }
7747                 req_complete_skb(hdev, status, opcode, orig_skb);
7748         }
7749
7750 done:
7751         kfree_skb(orig_skb);
7752         kfree_skb(skb);
7753         hdev->stat.evt_rx++;
7754 }