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_conn_ssp_enabled(conn))
5333                 goto unlock;
5334
5335         hci_conn_hold(conn);
5336
5337         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5338                 goto unlock;
5339
5340         /* Allow pairing if we're pairable, the initiators of the
5341          * pairing or if the remote is not requesting bonding.
5342          */
5343         if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5344             test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5345             (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5346                 struct hci_cp_io_capability_reply cp;
5347
5348                 bacpy(&cp.bdaddr, &ev->bdaddr);
5349                 /* Change the IO capability from KeyboardDisplay
5350                  * to DisplayYesNo as it is not supported by BT spec. */
5351                 cp.capability = (conn->io_capability == 0x04) ?
5352                                 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5353
5354                 /* If we are initiators, there is no remote information yet */
5355                 if (conn->remote_auth == 0xff) {
5356                         /* Request MITM protection if our IO caps allow it
5357                          * except for the no-bonding case.
5358                          */
5359                         if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5360                             conn->auth_type != HCI_AT_NO_BONDING)
5361                                 conn->auth_type |= 0x01;
5362                 } else {
5363                         conn->auth_type = hci_get_auth_req(conn);
5364                 }
5365
5366                 /* If we're not bondable, force one of the non-bondable
5367                  * authentication requirement values.
5368                  */
5369                 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5370                         conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5371
5372                 cp.authentication = conn->auth_type;
5373                 cp.oob_data = bredr_oob_data_present(conn);
5374
5375                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5376                              sizeof(cp), &cp);
5377         } else {
5378                 struct hci_cp_io_capability_neg_reply cp;
5379
5380                 bacpy(&cp.bdaddr, &ev->bdaddr);
5381                 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5382
5383                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5384                              sizeof(cp), &cp);
5385         }
5386
5387 unlock:
5388         hci_dev_unlock(hdev);
5389 }
5390
5391 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5392                                   struct sk_buff *skb)
5393 {
5394         struct hci_ev_io_capa_reply *ev = data;
5395         struct hci_conn *conn;
5396
5397         bt_dev_dbg(hdev, "");
5398
5399         hci_dev_lock(hdev);
5400
5401         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5402         if (!conn)
5403                 goto unlock;
5404
5405         conn->remote_cap = ev->capability;
5406         conn->remote_auth = ev->authentication;
5407
5408 unlock:
5409         hci_dev_unlock(hdev);
5410 }
5411
5412 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5413                                          struct sk_buff *skb)
5414 {
5415         struct hci_ev_user_confirm_req *ev = data;
5416         int loc_mitm, rem_mitm, confirm_hint = 0;
5417         struct hci_conn *conn;
5418
5419         bt_dev_dbg(hdev, "");
5420
5421         hci_dev_lock(hdev);
5422
5423         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5424                 goto unlock;
5425
5426         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5427         if (!conn)
5428                 goto unlock;
5429
5430         loc_mitm = (conn->auth_type & 0x01);
5431         rem_mitm = (conn->remote_auth & 0x01);
5432
5433         /* If we require MITM but the remote device can't provide that
5434          * (it has NoInputNoOutput) then reject the confirmation
5435          * request. We check the security level here since it doesn't
5436          * necessarily match conn->auth_type.
5437          */
5438         if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5439             conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5440                 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5441                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5442                              sizeof(ev->bdaddr), &ev->bdaddr);
5443                 goto unlock;
5444         }
5445
5446         /* If no side requires MITM protection; auto-accept */
5447         if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5448             (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5449
5450                 /* If we're not the initiators request authorization to
5451                  * proceed from user space (mgmt_user_confirm with
5452                  * confirm_hint set to 1). The exception is if neither
5453                  * side had MITM or if the local IO capability is
5454                  * NoInputNoOutput, in which case we do auto-accept
5455                  */
5456                 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5457                     conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5458                     (loc_mitm || rem_mitm)) {
5459                         bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5460                         confirm_hint = 1;
5461                         goto confirm;
5462                 }
5463
5464                 /* If there already exists link key in local host, leave the
5465                  * decision to user space since the remote device could be
5466                  * legitimate or malicious.
5467                  */
5468                 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5469                         bt_dev_dbg(hdev, "Local host already has link key");
5470                         confirm_hint = 1;
5471                         goto confirm;
5472                 }
5473
5474                 BT_DBG("Auto-accept of user confirmation with %ums delay",
5475                        hdev->auto_accept_delay);
5476
5477                 if (hdev->auto_accept_delay > 0) {
5478                         int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5479                         queue_delayed_work(conn->hdev->workqueue,
5480                                            &conn->auto_accept_work, delay);
5481                         goto unlock;
5482                 }
5483
5484                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5485                              sizeof(ev->bdaddr), &ev->bdaddr);
5486                 goto unlock;
5487         }
5488
5489 confirm:
5490         mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5491                                   le32_to_cpu(ev->passkey), confirm_hint);
5492
5493 unlock:
5494         hci_dev_unlock(hdev);
5495 }
5496
5497 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5498                                          struct sk_buff *skb)
5499 {
5500         struct hci_ev_user_passkey_req *ev = data;
5501
5502         bt_dev_dbg(hdev, "");
5503
5504         if (hci_dev_test_flag(hdev, HCI_MGMT))
5505                 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5506 }
5507
5508 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5509                                         struct sk_buff *skb)
5510 {
5511         struct hci_ev_user_passkey_notify *ev = data;
5512         struct hci_conn *conn;
5513
5514         bt_dev_dbg(hdev, "");
5515
5516         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5517         if (!conn)
5518                 return;
5519
5520         conn->passkey_notify = __le32_to_cpu(ev->passkey);
5521         conn->passkey_entered = 0;
5522
5523         if (hci_dev_test_flag(hdev, HCI_MGMT))
5524                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5525                                          conn->dst_type, conn->passkey_notify,
5526                                          conn->passkey_entered);
5527 }
5528
5529 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5530                                     struct sk_buff *skb)
5531 {
5532         struct hci_ev_keypress_notify *ev = data;
5533         struct hci_conn *conn;
5534
5535         bt_dev_dbg(hdev, "");
5536
5537         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5538         if (!conn)
5539                 return;
5540
5541         switch (ev->type) {
5542         case HCI_KEYPRESS_STARTED:
5543                 conn->passkey_entered = 0;
5544                 return;
5545
5546         case HCI_KEYPRESS_ENTERED:
5547                 conn->passkey_entered++;
5548                 break;
5549
5550         case HCI_KEYPRESS_ERASED:
5551                 conn->passkey_entered--;
5552                 break;
5553
5554         case HCI_KEYPRESS_CLEARED:
5555                 conn->passkey_entered = 0;
5556                 break;
5557
5558         case HCI_KEYPRESS_COMPLETED:
5559                 return;
5560         }
5561
5562         if (hci_dev_test_flag(hdev, HCI_MGMT))
5563                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5564                                          conn->dst_type, conn->passkey_notify,
5565                                          conn->passkey_entered);
5566 }
5567
5568 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5569                                          struct sk_buff *skb)
5570 {
5571         struct hci_ev_simple_pair_complete *ev = data;
5572         struct hci_conn *conn;
5573
5574         bt_dev_dbg(hdev, "");
5575
5576         hci_dev_lock(hdev);
5577
5578         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5579         if (!conn || !hci_conn_ssp_enabled(conn))
5580                 goto unlock;
5581
5582         /* Reset the authentication requirement to unknown */
5583         conn->remote_auth = 0xff;
5584
5585         /* To avoid duplicate auth_failed events to user space we check
5586          * the HCI_CONN_AUTH_PEND flag which will be set if we
5587          * initiated the authentication. A traditional auth_complete
5588          * event gets always produced as initiator and is also mapped to
5589          * the mgmt_auth_failed event */
5590         if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5591                 mgmt_auth_failed(conn, ev->status);
5592
5593         hci_conn_drop(conn);
5594
5595 unlock:
5596         hci_dev_unlock(hdev);
5597 }
5598
5599 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5600                                          struct sk_buff *skb)
5601 {
5602         struct hci_ev_remote_host_features *ev = data;
5603         struct inquiry_entry *ie;
5604         struct hci_conn *conn;
5605
5606         bt_dev_dbg(hdev, "");
5607
5608         hci_dev_lock(hdev);
5609
5610         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5611         if (conn)
5612                 memcpy(conn->features[1], ev->features, 8);
5613
5614         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5615         if (ie)
5616                 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5617
5618         hci_dev_unlock(hdev);
5619 }
5620
5621 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5622                                             struct sk_buff *skb)
5623 {
5624         struct hci_ev_remote_oob_data_request *ev = edata;
5625         struct oob_data *data;
5626
5627         bt_dev_dbg(hdev, "");
5628
5629         hci_dev_lock(hdev);
5630
5631         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5632                 goto unlock;
5633
5634         data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5635         if (!data) {
5636                 struct hci_cp_remote_oob_data_neg_reply cp;
5637
5638                 bacpy(&cp.bdaddr, &ev->bdaddr);
5639                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5640                              sizeof(cp), &cp);
5641                 goto unlock;
5642         }
5643
5644         if (bredr_sc_enabled(hdev)) {
5645                 struct hci_cp_remote_oob_ext_data_reply cp;
5646
5647                 bacpy(&cp.bdaddr, &ev->bdaddr);
5648                 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5649                         memset(cp.hash192, 0, sizeof(cp.hash192));
5650                         memset(cp.rand192, 0, sizeof(cp.rand192));
5651                 } else {
5652                         memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5653                         memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5654                 }
5655                 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5656                 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5657
5658                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5659                              sizeof(cp), &cp);
5660         } else {
5661                 struct hci_cp_remote_oob_data_reply cp;
5662
5663                 bacpy(&cp.bdaddr, &ev->bdaddr);
5664                 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5665                 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5666
5667                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5668                              sizeof(cp), &cp);
5669         }
5670
5671 unlock:
5672         hci_dev_unlock(hdev);
5673 }
5674
5675 #if IS_ENABLED(CONFIG_BT_HS)
5676 static void hci_chan_selected_evt(struct hci_dev *hdev, void *data,
5677                                   struct sk_buff *skb)
5678 {
5679         struct hci_ev_channel_selected *ev = data;
5680         struct hci_conn *hcon;
5681
5682         bt_dev_dbg(hdev, "handle 0x%2.2x", ev->phy_handle);
5683
5684         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5685         if (!hcon)
5686                 return;
5687
5688         amp_read_loc_assoc_final_data(hdev, hcon);
5689 }
5690
5691 static void hci_phy_link_complete_evt(struct hci_dev *hdev, void *data,
5692                                       struct sk_buff *skb)
5693 {
5694         struct hci_ev_phy_link_complete *ev = data;
5695         struct hci_conn *hcon, *bredr_hcon;
5696
5697         bt_dev_dbg(hdev, "handle 0x%2.2x status 0x%2.2x", ev->phy_handle,
5698                    ev->status);
5699
5700         hci_dev_lock(hdev);
5701
5702         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5703         if (!hcon)
5704                 goto unlock;
5705
5706         if (!hcon->amp_mgr)
5707                 goto unlock;
5708
5709         if (ev->status) {
5710                 hci_conn_del(hcon);
5711                 goto unlock;
5712         }
5713
5714         bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
5715
5716         hcon->state = BT_CONNECTED;
5717         bacpy(&hcon->dst, &bredr_hcon->dst);
5718
5719         hci_conn_hold(hcon);
5720         hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
5721         hci_conn_drop(hcon);
5722
5723         hci_debugfs_create_conn(hcon);
5724         hci_conn_add_sysfs(hcon);
5725
5726         amp_physical_cfm(bredr_hcon, hcon);
5727
5728 unlock:
5729         hci_dev_unlock(hdev);
5730 }
5731
5732 static void hci_loglink_complete_evt(struct hci_dev *hdev, void *data,
5733                                      struct sk_buff *skb)
5734 {
5735         struct hci_ev_logical_link_complete *ev = data;
5736         struct hci_conn *hcon;
5737         struct hci_chan *hchan;
5738         struct amp_mgr *mgr;
5739
5740         bt_dev_dbg(hdev, "log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
5741                    le16_to_cpu(ev->handle), ev->phy_handle, ev->status);
5742
5743         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5744         if (!hcon)
5745                 return;
5746
5747         /* Create AMP hchan */
5748         hchan = hci_chan_create(hcon);
5749         if (!hchan)
5750                 return;
5751
5752         hchan->handle = le16_to_cpu(ev->handle);
5753         hchan->amp = true;
5754
5755         BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
5756
5757         mgr = hcon->amp_mgr;
5758         if (mgr && mgr->bredr_chan) {
5759                 struct l2cap_chan *bredr_chan = mgr->bredr_chan;
5760
5761                 l2cap_chan_lock(bredr_chan);
5762
5763                 bredr_chan->conn->mtu = hdev->block_mtu;
5764                 l2cap_logical_cfm(bredr_chan, hchan, 0);
5765                 hci_conn_hold(hcon);
5766
5767                 l2cap_chan_unlock(bredr_chan);
5768         }
5769 }
5770
5771 static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev, void *data,
5772                                              struct sk_buff *skb)
5773 {
5774         struct hci_ev_disconn_logical_link_complete *ev = data;
5775         struct hci_chan *hchan;
5776
5777         bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x",
5778                    le16_to_cpu(ev->handle), ev->status);
5779
5780         if (ev->status)
5781                 return;
5782
5783         hci_dev_lock(hdev);
5784
5785         hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
5786         if (!hchan || !hchan->amp)
5787                 goto unlock;
5788
5789         amp_destroy_logical_link(hchan, ev->reason);
5790
5791 unlock:
5792         hci_dev_unlock(hdev);
5793 }
5794
5795 static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev, void *data,
5796                                              struct sk_buff *skb)
5797 {
5798         struct hci_ev_disconn_phy_link_complete *ev = data;
5799         struct hci_conn *hcon;
5800
5801         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5802
5803         if (ev->status)
5804                 return;
5805
5806         hci_dev_lock(hdev);
5807
5808         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5809         if (hcon && hcon->type == AMP_LINK) {
5810                 hcon->state = BT_CLOSED;
5811                 hci_disconn_cfm(hcon, ev->reason);
5812                 hci_conn_del(hcon);
5813         }
5814
5815         hci_dev_unlock(hdev);
5816 }
5817 #endif
5818
5819 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5820                                 u8 bdaddr_type, bdaddr_t *local_rpa)
5821 {
5822         if (conn->out) {
5823                 conn->dst_type = bdaddr_type;
5824                 conn->resp_addr_type = bdaddr_type;
5825                 bacpy(&conn->resp_addr, bdaddr);
5826
5827                 /* Check if the controller has set a Local RPA then it must be
5828                  * used instead or hdev->rpa.
5829                  */
5830                 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5831                         conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5832                         bacpy(&conn->init_addr, local_rpa);
5833                 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5834                         conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5835                         bacpy(&conn->init_addr, &conn->hdev->rpa);
5836                 } else {
5837                         hci_copy_identity_address(conn->hdev, &conn->init_addr,
5838                                                   &conn->init_addr_type);
5839                 }
5840         } else {
5841                 conn->resp_addr_type = conn->hdev->adv_addr_type;
5842                 /* Check if the controller has set a Local RPA then it must be
5843                  * used instead or hdev->rpa.
5844                  */
5845                 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5846                         conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5847                         bacpy(&conn->resp_addr, local_rpa);
5848                 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5849                         /* In case of ext adv, resp_addr will be updated in
5850                          * Adv Terminated event.
5851                          */
5852                         if (!ext_adv_capable(conn->hdev))
5853                                 bacpy(&conn->resp_addr,
5854                                       &conn->hdev->random_addr);
5855                 } else {
5856                         bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5857                 }
5858
5859                 conn->init_addr_type = bdaddr_type;
5860                 bacpy(&conn->init_addr, bdaddr);
5861
5862                 /* For incoming connections, set the default minimum
5863                  * and maximum connection interval. They will be used
5864                  * to check if the parameters are in range and if not
5865                  * trigger the connection update procedure.
5866                  */
5867                 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5868                 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5869         }
5870 }
5871
5872 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5873                                  bdaddr_t *bdaddr, u8 bdaddr_type,
5874                                  bdaddr_t *local_rpa, u8 role, u16 handle,
5875                                  u16 interval, u16 latency,
5876                                  u16 supervision_timeout)
5877 {
5878         struct hci_conn_params *params;
5879         struct hci_conn *conn;
5880         struct smp_irk *irk;
5881         u8 addr_type;
5882
5883         hci_dev_lock(hdev);
5884
5885         /* All controllers implicitly stop advertising in the event of a
5886          * connection, so ensure that the state bit is cleared.
5887          */
5888         hci_dev_clear_flag(hdev, HCI_LE_ADV);
5889
5890         conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5891         if (!conn) {
5892                 /* In case of error status and there is no connection pending
5893                  * just unlock as there is nothing to cleanup.
5894                  */
5895                 if (status)
5896                         goto unlock;
5897
5898                 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5899                 if (!conn) {
5900                         bt_dev_err(hdev, "no memory for new connection");
5901                         goto unlock;
5902                 }
5903
5904                 conn->dst_type = bdaddr_type;
5905
5906                 /* If we didn't have a hci_conn object previously
5907                  * but we're in central role this must be something
5908                  * initiated using an accept list. Since accept list based
5909                  * connections are not "first class citizens" we don't
5910                  * have full tracking of them. Therefore, we go ahead
5911                  * with a "best effort" approach of determining the
5912                  * initiator address based on the HCI_PRIVACY flag.
5913                  */
5914                 if (conn->out) {
5915                         conn->resp_addr_type = bdaddr_type;
5916                         bacpy(&conn->resp_addr, bdaddr);
5917                         if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5918                                 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5919                                 bacpy(&conn->init_addr, &hdev->rpa);
5920                         } else {
5921                                 hci_copy_identity_address(hdev,
5922                                                           &conn->init_addr,
5923                                                           &conn->init_addr_type);
5924                         }
5925                 }
5926         } else {
5927                 cancel_delayed_work(&conn->le_conn_timeout);
5928         }
5929
5930         /* The HCI_LE_Connection_Complete event is only sent once per connection.
5931          * Processing it more than once per connection can corrupt kernel memory.
5932          *
5933          * As the connection handle is set here for the first time, it indicates
5934          * whether the connection is already set up.
5935          */
5936         if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5937                 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5938                 goto unlock;
5939         }
5940
5941         le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5942
5943         /* Lookup the identity address from the stored connection
5944          * address and address type.
5945          *
5946          * When establishing connections to an identity address, the
5947          * connection procedure will store the resolvable random
5948          * address first. Now if it can be converted back into the
5949          * identity address, start using the identity address from
5950          * now on.
5951          */
5952         irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5953         if (irk) {
5954                 bacpy(&conn->dst, &irk->bdaddr);
5955                 conn->dst_type = irk->addr_type;
5956         }
5957
5958         conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5959
5960         /* All connection failure handling is taken care of by the
5961          * hci_conn_failed function which is triggered by the HCI
5962          * request completion callbacks used for connecting.
5963          */
5964         if (status || hci_conn_set_handle(conn, handle))
5965                 goto unlock;
5966
5967         /* Drop the connection if it has been aborted */
5968         if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5969                 hci_conn_drop(conn);
5970                 goto unlock;
5971         }
5972
5973         if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5974                 addr_type = BDADDR_LE_PUBLIC;
5975         else
5976                 addr_type = BDADDR_LE_RANDOM;
5977
5978         /* Drop the connection if the device is blocked */
5979         if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5980                 hci_conn_drop(conn);
5981                 goto unlock;
5982         }
5983
5984         if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
5985                 mgmt_device_connected(hdev, conn, NULL, 0);
5986
5987         conn->sec_level = BT_SECURITY_LOW;
5988         conn->state = BT_CONFIG;
5989
5990         /* Store current advertising instance as connection advertising instance
5991          * when sotfware rotation is in use so it can be re-enabled when
5992          * disconnected.
5993          */
5994         if (!ext_adv_capable(hdev))
5995                 conn->adv_instance = hdev->cur_adv_instance;
5996
5997         conn->le_conn_interval = interval;
5998         conn->le_conn_latency = latency;
5999         conn->le_supv_timeout = supervision_timeout;
6000
6001         hci_debugfs_create_conn(conn);
6002         hci_conn_add_sysfs(conn);
6003
6004         /* The remote features procedure is defined for central
6005          * role only. So only in case of an initiated connection
6006          * request the remote features.
6007          *
6008          * If the local controller supports peripheral-initiated features
6009          * exchange, then requesting the remote features in peripheral
6010          * role is possible. Otherwise just transition into the
6011          * connected state without requesting the remote features.
6012          */
6013         if (conn->out ||
6014             (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
6015                 struct hci_cp_le_read_remote_features cp;
6016
6017                 cp.handle = __cpu_to_le16(conn->handle);
6018
6019                 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
6020                              sizeof(cp), &cp);
6021
6022                 hci_conn_hold(conn);
6023         } else {
6024                 conn->state = BT_CONNECTED;
6025                 hci_connect_cfm(conn, status);
6026         }
6027
6028         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
6029                                            conn->dst_type);
6030         if (params) {
6031                 hci_pend_le_list_del_init(params);
6032                 if (params->conn) {
6033                         hci_conn_drop(params->conn);
6034                         hci_conn_put(params->conn);
6035                         params->conn = NULL;
6036                 }
6037         }
6038
6039 unlock:
6040         hci_update_passive_scan(hdev);
6041         hci_dev_unlock(hdev);
6042 }
6043
6044 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
6045                                      struct sk_buff *skb)
6046 {
6047         struct hci_ev_le_conn_complete *ev = data;
6048
6049         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6050
6051         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
6052                              NULL, ev->role, le16_to_cpu(ev->handle),
6053                              le16_to_cpu(ev->interval),
6054                              le16_to_cpu(ev->latency),
6055                              le16_to_cpu(ev->supervision_timeout));
6056 }
6057
6058 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
6059                                          struct sk_buff *skb)
6060 {
6061         struct hci_ev_le_enh_conn_complete *ev = data;
6062
6063         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6064
6065         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
6066                              &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
6067                              le16_to_cpu(ev->interval),
6068                              le16_to_cpu(ev->latency),
6069                              le16_to_cpu(ev->supervision_timeout));
6070 }
6071
6072 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
6073                                     struct sk_buff *skb)
6074 {
6075         struct hci_evt_le_ext_adv_set_term *ev = data;
6076         struct hci_conn *conn;
6077         struct adv_info *adv, *n;
6078
6079         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6080
6081         /* The Bluetooth Core 5.3 specification clearly states that this event
6082          * shall not be sent when the Host disables the advertising set. So in
6083          * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
6084          *
6085          * When the Host disables an advertising set, all cleanup is done via
6086          * its command callback and not needed to be duplicated here.
6087          */
6088         if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
6089                 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
6090                 return;
6091         }
6092
6093         hci_dev_lock(hdev);
6094
6095         adv = hci_find_adv_instance(hdev, ev->handle);
6096
6097         if (ev->status) {
6098                 if (!adv)
6099                         goto unlock;
6100
6101                 /* Remove advertising as it has been terminated */
6102                 hci_remove_adv_instance(hdev, ev->handle);
6103                 mgmt_advertising_removed(NULL, hdev, ev->handle);
6104
6105                 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
6106                         if (adv->enabled)
6107                                 goto unlock;
6108                 }
6109
6110                 /* We are no longer advertising, clear HCI_LE_ADV */
6111                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6112                 goto unlock;
6113         }
6114
6115         if (adv)
6116                 adv->enabled = false;
6117
6118         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
6119         if (conn) {
6120                 /* Store handle in the connection so the correct advertising
6121                  * instance can be re-enabled when disconnected.
6122                  */
6123                 conn->adv_instance = ev->handle;
6124
6125                 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
6126                     bacmp(&conn->resp_addr, BDADDR_ANY))
6127                         goto unlock;
6128
6129                 if (!ev->handle) {
6130                         bacpy(&conn->resp_addr, &hdev->random_addr);
6131                         goto unlock;
6132                 }
6133
6134                 if (adv)
6135                         bacpy(&conn->resp_addr, &adv->random_addr);
6136         }
6137
6138 unlock:
6139         hci_dev_unlock(hdev);
6140 }
6141
6142 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
6143                                             struct sk_buff *skb)
6144 {
6145         struct hci_ev_le_conn_update_complete *ev = data;
6146         struct hci_conn *conn;
6147
6148         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6149
6150         if (ev->status)
6151                 return;
6152
6153         hci_dev_lock(hdev);
6154
6155         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6156         if (conn) {
6157                 conn->le_conn_interval = le16_to_cpu(ev->interval);
6158                 conn->le_conn_latency = le16_to_cpu(ev->latency);
6159                 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
6160         }
6161
6162         hci_dev_unlock(hdev);
6163 }
6164
6165 /* This function requires the caller holds hdev->lock */
6166 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
6167                                               bdaddr_t *addr,
6168                                               u8 addr_type, bool addr_resolved,
6169                                               u8 adv_type)
6170 {
6171         struct hci_conn *conn;
6172         struct hci_conn_params *params;
6173
6174         /* If the event is not connectable don't proceed further */
6175         if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
6176                 return NULL;
6177
6178         /* Ignore if the device is blocked or hdev is suspended */
6179         if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
6180             hdev->suspended)
6181                 return NULL;
6182
6183         /* Most controller will fail if we try to create new connections
6184          * while we have an existing one in peripheral role.
6185          */
6186         if (hdev->conn_hash.le_num_peripheral > 0 &&
6187             (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
6188              !(hdev->le_states[3] & 0x10)))
6189                 return NULL;
6190
6191         /* If we're not connectable only connect devices that we have in
6192          * our pend_le_conns list.
6193          */
6194         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
6195                                            addr_type);
6196         if (!params)
6197                 return NULL;
6198
6199         if (!params->explicit_connect) {
6200                 switch (params->auto_connect) {
6201                 case HCI_AUTO_CONN_DIRECT:
6202                         /* Only devices advertising with ADV_DIRECT_IND are
6203                          * triggering a connection attempt. This is allowing
6204                          * incoming connections from peripheral devices.
6205                          */
6206                         if (adv_type != LE_ADV_DIRECT_IND)
6207                                 return NULL;
6208                         break;
6209                 case HCI_AUTO_CONN_ALWAYS:
6210                         /* Devices advertising with ADV_IND or ADV_DIRECT_IND
6211                          * are triggering a connection attempt. This means
6212                          * that incoming connections from peripheral device are
6213                          * accepted and also outgoing connections to peripheral
6214                          * devices are established when found.
6215                          */
6216                         break;
6217                 default:
6218                         return NULL;
6219                 }
6220         }
6221
6222         conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
6223                               BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
6224                               HCI_ROLE_MASTER);
6225         if (!IS_ERR(conn)) {
6226                 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
6227                  * by higher layer that tried to connect, if no then
6228                  * store the pointer since we don't really have any
6229                  * other owner of the object besides the params that
6230                  * triggered it. This way we can abort the connection if
6231                  * the parameters get removed and keep the reference
6232                  * count consistent once the connection is established.
6233                  */
6234
6235                 if (!params->explicit_connect)
6236                         params->conn = hci_conn_get(conn);
6237
6238                 return conn;
6239         }
6240
6241         switch (PTR_ERR(conn)) {
6242         case -EBUSY:
6243                 /* If hci_connect() returns -EBUSY it means there is already
6244                  * an LE connection attempt going on. Since controllers don't
6245                  * support more than one connection attempt at the time, we
6246                  * don't consider this an error case.
6247                  */
6248                 break;
6249         default:
6250                 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
6251                 return NULL;
6252         }
6253
6254         return NULL;
6255 }
6256
6257 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6258                                u8 bdaddr_type, bdaddr_t *direct_addr,
6259                                u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
6260                                bool ext_adv, bool ctl_time, u64 instant)
6261 {
6262         struct discovery_state *d = &hdev->discovery;
6263         struct smp_irk *irk;
6264         struct hci_conn *conn;
6265         bool match, bdaddr_resolved;
6266         u32 flags;
6267         u8 *ptr;
6268
6269         switch (type) {
6270         case LE_ADV_IND:
6271         case LE_ADV_DIRECT_IND:
6272         case LE_ADV_SCAN_IND:
6273         case LE_ADV_NONCONN_IND:
6274         case LE_ADV_SCAN_RSP:
6275                 break;
6276         default:
6277                 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6278                                        "type: 0x%02x", type);
6279                 return;
6280         }
6281
6282         if (len > max_adv_len(hdev)) {
6283                 bt_dev_err_ratelimited(hdev,
6284                                        "adv larger than maximum supported");
6285                 return;
6286         }
6287
6288         /* Find the end of the data in case the report contains padded zero
6289          * bytes at the end causing an invalid length value.
6290          *
6291          * When data is NULL, len is 0 so there is no need for extra ptr
6292          * check as 'ptr < data + 0' is already false in such case.
6293          */
6294         for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6295                 if (ptr + 1 + *ptr > data + len)
6296                         break;
6297         }
6298
6299         /* Adjust for actual length. This handles the case when remote
6300          * device is advertising with incorrect data length.
6301          */
6302         len = ptr - data;
6303
6304         /* If the direct address is present, then this report is from
6305          * a LE Direct Advertising Report event. In that case it is
6306          * important to see if the address is matching the local
6307          * controller address.
6308          */
6309         if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6310                 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6311                                                   &bdaddr_resolved);
6312
6313                 /* Only resolvable random addresses are valid for these
6314                  * kind of reports and others can be ignored.
6315                  */
6316                 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6317                         return;
6318
6319                 /* If the controller is not using resolvable random
6320                  * addresses, then this report can be ignored.
6321                  */
6322                 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6323                         return;
6324
6325                 /* If the local IRK of the controller does not match
6326                  * with the resolvable random address provided, then
6327                  * this report can be ignored.
6328                  */
6329                 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6330                         return;
6331         }
6332
6333         /* Check if we need to convert to identity address */
6334         irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6335         if (irk) {
6336                 bdaddr = &irk->bdaddr;
6337                 bdaddr_type = irk->addr_type;
6338         }
6339
6340         bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6341
6342         /* Check if we have been requested to connect to this device.
6343          *
6344          * direct_addr is set only for directed advertising reports (it is NULL
6345          * for advertising reports) and is already verified to be RPA above.
6346          */
6347         conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6348                                      type);
6349         if (!ext_adv && conn && type == LE_ADV_IND &&
6350             len <= max_adv_len(hdev)) {
6351                 /* Store report for later inclusion by
6352                  * mgmt_device_connected
6353                  */
6354                 memcpy(conn->le_adv_data, data, len);
6355                 conn->le_adv_data_len = len;
6356         }
6357
6358         if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6359                 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6360         else
6361                 flags = 0;
6362
6363         /* All scan results should be sent up for Mesh systems */
6364         if (hci_dev_test_flag(hdev, HCI_MESH)) {
6365                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6366                                   rssi, flags, data, len, NULL, 0, instant);
6367                 return;
6368         }
6369
6370         /* Passive scanning shouldn't trigger any device found events,
6371          * except for devices marked as CONN_REPORT for which we do send
6372          * device found events, or advertisement monitoring requested.
6373          */
6374         if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6375                 if (type == LE_ADV_DIRECT_IND)
6376                         return;
6377
6378                 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6379                                                bdaddr, bdaddr_type) &&
6380                     idr_is_empty(&hdev->adv_monitors_idr))
6381                         return;
6382
6383                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6384                                   rssi, flags, data, len, NULL, 0, 0);
6385                 return;
6386         }
6387
6388         /* When receiving a scan response, then there is no way to
6389          * know if the remote device is connectable or not. However
6390          * since scan responses are merged with a previously seen
6391          * advertising report, the flags field from that report
6392          * will be used.
6393          *
6394          * In the unlikely case that a controller just sends a scan
6395          * response event that doesn't match the pending report, then
6396          * it is marked as a standalone SCAN_RSP.
6397          */
6398         if (type == LE_ADV_SCAN_RSP)
6399                 flags = MGMT_DEV_FOUND_SCAN_RSP;
6400
6401         /* If there's nothing pending either store the data from this
6402          * event or send an immediate device found event if the data
6403          * should not be stored for later.
6404          */
6405         if (!ext_adv && !has_pending_adv_report(hdev)) {
6406                 /* If the report will trigger a SCAN_REQ store it for
6407                  * later merging.
6408                  */
6409                 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6410                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6411                                                  rssi, flags, data, len);
6412                         return;
6413                 }
6414
6415                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6416                                   rssi, flags, data, len, NULL, 0, 0);
6417                 return;
6418         }
6419
6420         /* Check if the pending report is for the same device as the new one */
6421         match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6422                  bdaddr_type == d->last_adv_addr_type);
6423
6424         /* If the pending data doesn't match this report or this isn't a
6425          * scan response (e.g. we got a duplicate ADV_IND) then force
6426          * sending of the pending data.
6427          */
6428         if (type != LE_ADV_SCAN_RSP || !match) {
6429                 /* Send out whatever is in the cache, but skip duplicates */
6430                 if (!match)
6431                         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6432                                           d->last_adv_addr_type, NULL,
6433                                           d->last_adv_rssi, d->last_adv_flags,
6434                                           d->last_adv_data,
6435                                           d->last_adv_data_len, NULL, 0, 0);
6436
6437                 /* If the new report will trigger a SCAN_REQ store it for
6438                  * later merging.
6439                  */
6440                 if (!ext_adv && (type == LE_ADV_IND ||
6441                                  type == LE_ADV_SCAN_IND)) {
6442                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6443                                                  rssi, flags, data, len);
6444                         return;
6445                 }
6446
6447                 /* The advertising reports cannot be merged, so clear
6448                  * the pending report and send out a device found event.
6449                  */
6450                 clear_pending_adv_report(hdev);
6451                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6452                                   rssi, flags, data, len, NULL, 0, 0);
6453                 return;
6454         }
6455
6456         /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6457          * the new event is a SCAN_RSP. We can therefore proceed with
6458          * sending a merged device found event.
6459          */
6460         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6461                           d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6462                           d->last_adv_data, d->last_adv_data_len, data, len, 0);
6463         clear_pending_adv_report(hdev);
6464 }
6465
6466 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6467                                   struct sk_buff *skb)
6468 {
6469         struct hci_ev_le_advertising_report *ev = data;
6470         u64 instant = jiffies;
6471
6472         if (!ev->num)
6473                 return;
6474
6475         hci_dev_lock(hdev);
6476
6477         while (ev->num--) {
6478                 struct hci_ev_le_advertising_info *info;
6479                 s8 rssi;
6480
6481                 info = hci_le_ev_skb_pull(hdev, skb,
6482                                           HCI_EV_LE_ADVERTISING_REPORT,
6483                                           sizeof(*info));
6484                 if (!info)
6485                         break;
6486
6487                 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6488                                         info->length + 1))
6489                         break;
6490
6491                 if (info->length <= max_adv_len(hdev)) {
6492                         rssi = info->data[info->length];
6493                         process_adv_report(hdev, info->type, &info->bdaddr,
6494                                            info->bdaddr_type, NULL, 0, rssi,
6495                                            info->data, info->length, false,
6496                                            false, instant);
6497                 } else {
6498                         bt_dev_err(hdev, "Dropping invalid advertising data");
6499                 }
6500         }
6501
6502         hci_dev_unlock(hdev);
6503 }
6504
6505 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6506 {
6507         if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6508                 switch (evt_type) {
6509                 case LE_LEGACY_ADV_IND:
6510                         return LE_ADV_IND;
6511                 case LE_LEGACY_ADV_DIRECT_IND:
6512                         return LE_ADV_DIRECT_IND;
6513                 case LE_LEGACY_ADV_SCAN_IND:
6514                         return LE_ADV_SCAN_IND;
6515                 case LE_LEGACY_NONCONN_IND:
6516                         return LE_ADV_NONCONN_IND;
6517                 case LE_LEGACY_SCAN_RSP_ADV:
6518                 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6519                         return LE_ADV_SCAN_RSP;
6520                 }
6521
6522                 goto invalid;
6523         }
6524
6525         if (evt_type & LE_EXT_ADV_CONN_IND) {
6526                 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6527                         return LE_ADV_DIRECT_IND;
6528
6529                 return LE_ADV_IND;
6530         }
6531
6532         if (evt_type & LE_EXT_ADV_SCAN_RSP)
6533                 return LE_ADV_SCAN_RSP;
6534
6535         if (evt_type & LE_EXT_ADV_SCAN_IND)
6536                 return LE_ADV_SCAN_IND;
6537
6538         if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6539             evt_type & LE_EXT_ADV_DIRECT_IND)
6540                 return LE_ADV_NONCONN_IND;
6541
6542 invalid:
6543         bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6544                                evt_type);
6545
6546         return LE_ADV_INVALID;
6547 }
6548
6549 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6550                                       struct sk_buff *skb)
6551 {
6552         struct hci_ev_le_ext_adv_report *ev = data;
6553         u64 instant = jiffies;
6554
6555         if (!ev->num)
6556                 return;
6557
6558         hci_dev_lock(hdev);
6559
6560         while (ev->num--) {
6561                 struct hci_ev_le_ext_adv_info *info;
6562                 u8 legacy_evt_type;
6563                 u16 evt_type;
6564
6565                 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6566                                           sizeof(*info));
6567                 if (!info)
6568                         break;
6569
6570                 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6571                                         info->length))
6572                         break;
6573
6574                 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6575                 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6576                 if (legacy_evt_type != LE_ADV_INVALID) {
6577                         process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6578                                            info->bdaddr_type, NULL, 0,
6579                                            info->rssi, info->data, info->length,
6580                                            !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6581                                            false, instant);
6582                 }
6583         }
6584
6585         hci_dev_unlock(hdev);
6586 }
6587
6588 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6589 {
6590         struct hci_cp_le_pa_term_sync cp;
6591
6592         memset(&cp, 0, sizeof(cp));
6593         cp.handle = handle;
6594
6595         return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6596 }
6597
6598 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6599                                             struct sk_buff *skb)
6600 {
6601         struct hci_ev_le_pa_sync_established *ev = data;
6602         int mask = hdev->link_mode;
6603         __u8 flags = 0;
6604         struct hci_conn *pa_sync;
6605
6606         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6607
6608         hci_dev_lock(hdev);
6609
6610         hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6611
6612         mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6613         if (!(mask & HCI_LM_ACCEPT)) {
6614                 hci_le_pa_term_sync(hdev, ev->handle);
6615                 goto unlock;
6616         }
6617
6618         if (!(flags & HCI_PROTO_DEFER))
6619                 goto unlock;
6620
6621         if (ev->status) {
6622                 /* Add connection to indicate the failed PA sync event */
6623                 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6624                                              HCI_ROLE_SLAVE);
6625
6626                 if (!pa_sync)
6627                         goto unlock;
6628
6629                 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6630
6631                 /* Notify iso layer */
6632                 hci_connect_cfm(pa_sync, ev->status);
6633         }
6634
6635 unlock:
6636         hci_dev_unlock(hdev);
6637 }
6638
6639 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6640                                       struct sk_buff *skb)
6641 {
6642         struct hci_ev_le_per_adv_report *ev = data;
6643         int mask = hdev->link_mode;
6644         __u8 flags = 0;
6645
6646         bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6647
6648         hci_dev_lock(hdev);
6649
6650         mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6651         if (!(mask & HCI_LM_ACCEPT))
6652                 hci_le_pa_term_sync(hdev, ev->sync_handle);
6653
6654         hci_dev_unlock(hdev);
6655 }
6656
6657 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6658                                             struct sk_buff *skb)
6659 {
6660         struct hci_ev_le_remote_feat_complete *ev = data;
6661         struct hci_conn *conn;
6662
6663         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6664
6665         hci_dev_lock(hdev);
6666
6667         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6668         if (conn) {
6669                 if (!ev->status)
6670                         memcpy(conn->features[0], ev->features, 8);
6671
6672                 if (conn->state == BT_CONFIG) {
6673                         __u8 status;
6674
6675                         /* If the local controller supports peripheral-initiated
6676                          * features exchange, but the remote controller does
6677                          * not, then it is possible that the error code 0x1a
6678                          * for unsupported remote feature gets returned.
6679                          *
6680                          * In this specific case, allow the connection to
6681                          * transition into connected state and mark it as
6682                          * successful.
6683                          */
6684                         if (!conn->out && ev->status == 0x1a &&
6685                             (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6686                                 status = 0x00;
6687                         else
6688                                 status = ev->status;
6689
6690                         conn->state = BT_CONNECTED;
6691                         hci_connect_cfm(conn, status);
6692                         hci_conn_drop(conn);
6693                 }
6694         }
6695
6696         hci_dev_unlock(hdev);
6697 }
6698
6699 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6700                                    struct sk_buff *skb)
6701 {
6702         struct hci_ev_le_ltk_req *ev = data;
6703         struct hci_cp_le_ltk_reply cp;
6704         struct hci_cp_le_ltk_neg_reply neg;
6705         struct hci_conn *conn;
6706         struct smp_ltk *ltk;
6707
6708         bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6709
6710         hci_dev_lock(hdev);
6711
6712         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6713         if (conn == NULL)
6714                 goto not_found;
6715
6716         ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6717         if (!ltk)
6718                 goto not_found;
6719
6720         if (smp_ltk_is_sc(ltk)) {
6721                 /* With SC both EDiv and Rand are set to zero */
6722                 if (ev->ediv || ev->rand)
6723                         goto not_found;
6724         } else {
6725                 /* For non-SC keys check that EDiv and Rand match */
6726                 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6727                         goto not_found;
6728         }
6729
6730         memcpy(cp.ltk, ltk->val, ltk->enc_size);
6731         memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6732         cp.handle = cpu_to_le16(conn->handle);
6733
6734         conn->pending_sec_level = smp_ltk_sec_level(ltk);
6735
6736         conn->enc_key_size = ltk->enc_size;
6737
6738         hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6739
6740         /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6741          * temporary key used to encrypt a connection following
6742          * pairing. It is used during the Encrypted Session Setup to
6743          * distribute the keys. Later, security can be re-established
6744          * using a distributed LTK.
6745          */
6746         if (ltk->type == SMP_STK) {
6747                 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6748                 list_del_rcu(&ltk->list);
6749                 kfree_rcu(ltk, rcu);
6750         } else {
6751                 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6752         }
6753
6754         hci_dev_unlock(hdev);
6755
6756         return;
6757
6758 not_found:
6759         neg.handle = ev->handle;
6760         hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6761         hci_dev_unlock(hdev);
6762 }
6763
6764 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6765                                       u8 reason)
6766 {
6767         struct hci_cp_le_conn_param_req_neg_reply cp;
6768
6769         cp.handle = cpu_to_le16(handle);
6770         cp.reason = reason;
6771
6772         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6773                      &cp);
6774 }
6775
6776 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6777                                              struct sk_buff *skb)
6778 {
6779         struct hci_ev_le_remote_conn_param_req *ev = data;
6780         struct hci_cp_le_conn_param_req_reply cp;
6781         struct hci_conn *hcon;
6782         u16 handle, min, max, latency, timeout;
6783
6784         bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6785
6786         handle = le16_to_cpu(ev->handle);
6787         min = le16_to_cpu(ev->interval_min);
6788         max = le16_to_cpu(ev->interval_max);
6789         latency = le16_to_cpu(ev->latency);
6790         timeout = le16_to_cpu(ev->timeout);
6791
6792         hcon = hci_conn_hash_lookup_handle(hdev, handle);
6793         if (!hcon || hcon->state != BT_CONNECTED)
6794                 return send_conn_param_neg_reply(hdev, handle,
6795                                                  HCI_ERROR_UNKNOWN_CONN_ID);
6796
6797         if (hci_check_conn_params(min, max, latency, timeout))
6798                 return send_conn_param_neg_reply(hdev, handle,
6799                                                  HCI_ERROR_INVALID_LL_PARAMS);
6800
6801         if (hcon->role == HCI_ROLE_MASTER) {
6802                 struct hci_conn_params *params;
6803                 u8 store_hint;
6804
6805                 hci_dev_lock(hdev);
6806
6807                 params = hci_conn_params_lookup(hdev, &hcon->dst,
6808                                                 hcon->dst_type);
6809                 if (params) {
6810                         params->conn_min_interval = min;
6811                         params->conn_max_interval = max;
6812                         params->conn_latency = latency;
6813                         params->supervision_timeout = timeout;
6814                         store_hint = 0x01;
6815                 } else {
6816                         store_hint = 0x00;
6817                 }
6818
6819                 hci_dev_unlock(hdev);
6820
6821                 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6822                                     store_hint, min, max, latency, timeout);
6823         }
6824
6825         cp.handle = ev->handle;
6826         cp.interval_min = ev->interval_min;
6827         cp.interval_max = ev->interval_max;
6828         cp.latency = ev->latency;
6829         cp.timeout = ev->timeout;
6830         cp.min_ce_len = 0;
6831         cp.max_ce_len = 0;
6832
6833         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6834 }
6835
6836 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6837                                          struct sk_buff *skb)
6838 {
6839         struct hci_ev_le_direct_adv_report *ev = data;
6840         u64 instant = jiffies;
6841         int i;
6842
6843         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6844                                 flex_array_size(ev, info, ev->num)))
6845                 return;
6846
6847         if (!ev->num)
6848                 return;
6849
6850         hci_dev_lock(hdev);
6851
6852         for (i = 0; i < ev->num; i++) {
6853                 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6854
6855                 process_adv_report(hdev, info->type, &info->bdaddr,
6856                                    info->bdaddr_type, &info->direct_addr,
6857                                    info->direct_addr_type, info->rssi, NULL, 0,
6858                                    false, false, instant);
6859         }
6860
6861         hci_dev_unlock(hdev);
6862 }
6863
6864 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6865                                   struct sk_buff *skb)
6866 {
6867         struct hci_ev_le_phy_update_complete *ev = data;
6868         struct hci_conn *conn;
6869
6870         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6871
6872         if (ev->status)
6873                 return;
6874
6875         hci_dev_lock(hdev);
6876
6877         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6878         if (!conn)
6879                 goto unlock;
6880
6881         conn->le_tx_phy = ev->tx_phy;
6882         conn->le_rx_phy = ev->rx_phy;
6883
6884 unlock:
6885         hci_dev_unlock(hdev);
6886 }
6887
6888 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6889                                         struct sk_buff *skb)
6890 {
6891         struct hci_evt_le_cis_established *ev = data;
6892         struct hci_conn *conn;
6893         struct bt_iso_qos *qos;
6894         bool pending = false;
6895         u16 handle = __le16_to_cpu(ev->handle);
6896
6897         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6898
6899         hci_dev_lock(hdev);
6900
6901         conn = hci_conn_hash_lookup_handle(hdev, handle);
6902         if (!conn) {
6903                 bt_dev_err(hdev,
6904                            "Unable to find connection with handle 0x%4.4x",
6905                            handle);
6906                 goto unlock;
6907         }
6908
6909         if (conn->type != ISO_LINK) {
6910                 bt_dev_err(hdev,
6911                            "Invalid connection link type handle 0x%4.4x",
6912                            handle);
6913                 goto unlock;
6914         }
6915
6916         qos = &conn->iso_qos;
6917
6918         pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6919
6920         /* Convert ISO Interval (1.25 ms slots) to SDU Interval (us) */
6921         qos->ucast.in.interval = le16_to_cpu(ev->interval) * 1250;
6922         qos->ucast.out.interval = qos->ucast.in.interval;
6923
6924         switch (conn->role) {
6925         case HCI_ROLE_SLAVE:
6926                 /* Convert Transport Latency (us) to Latency (msec) */
6927                 qos->ucast.in.latency =
6928                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6929                                           1000);
6930                 qos->ucast.out.latency =
6931                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6932                                           1000);
6933                 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6934                 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6935                 qos->ucast.in.phy = ev->c_phy;
6936                 qos->ucast.out.phy = ev->p_phy;
6937                 break;
6938         case HCI_ROLE_MASTER:
6939                 /* Convert Transport Latency (us) to Latency (msec) */
6940                 qos->ucast.out.latency =
6941                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6942                                           1000);
6943                 qos->ucast.in.latency =
6944                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6945                                           1000);
6946                 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6947                 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6948                 qos->ucast.out.phy = ev->c_phy;
6949                 qos->ucast.in.phy = ev->p_phy;
6950                 break;
6951         }
6952
6953         if (!ev->status) {
6954                 conn->state = BT_CONNECTED;
6955                 hci_debugfs_create_conn(conn);
6956                 hci_conn_add_sysfs(conn);
6957                 hci_iso_setup_path(conn);
6958                 goto unlock;
6959         }
6960
6961         conn->state = BT_CLOSED;
6962         hci_connect_cfm(conn, ev->status);
6963         hci_conn_del(conn);
6964
6965 unlock:
6966         if (pending)
6967                 hci_le_create_cis_pending(hdev);
6968
6969         hci_dev_unlock(hdev);
6970 }
6971
6972 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6973 {
6974         struct hci_cp_le_reject_cis cp;
6975
6976         memset(&cp, 0, sizeof(cp));
6977         cp.handle = handle;
6978         cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6979         hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6980 }
6981
6982 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6983 {
6984         struct hci_cp_le_accept_cis cp;
6985
6986         memset(&cp, 0, sizeof(cp));
6987         cp.handle = handle;
6988         hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6989 }
6990
6991 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6992                                struct sk_buff *skb)
6993 {
6994         struct hci_evt_le_cis_req *ev = data;
6995         u16 acl_handle, cis_handle;
6996         struct hci_conn *acl, *cis;
6997         int mask;
6998         __u8 flags = 0;
6999
7000         acl_handle = __le16_to_cpu(ev->acl_handle);
7001         cis_handle = __le16_to_cpu(ev->cis_handle);
7002
7003         bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
7004                    acl_handle, cis_handle, ev->cig_id, ev->cis_id);
7005
7006         hci_dev_lock(hdev);
7007
7008         acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
7009         if (!acl)
7010                 goto unlock;
7011
7012         mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
7013         if (!(mask & HCI_LM_ACCEPT)) {
7014                 hci_le_reject_cis(hdev, ev->cis_handle);
7015                 goto unlock;
7016         }
7017
7018         cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
7019         if (!cis) {
7020                 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
7021                                    cis_handle);
7022                 if (!cis) {
7023                         hci_le_reject_cis(hdev, ev->cis_handle);
7024                         goto unlock;
7025                 }
7026         }
7027
7028         cis->iso_qos.ucast.cig = ev->cig_id;
7029         cis->iso_qos.ucast.cis = ev->cis_id;
7030
7031         if (!(flags & HCI_PROTO_DEFER)) {
7032                 hci_le_accept_cis(hdev, ev->cis_handle);
7033         } else {
7034                 cis->state = BT_CONNECT2;
7035                 hci_connect_cfm(cis, 0);
7036         }
7037
7038 unlock:
7039         hci_dev_unlock(hdev);
7040 }
7041
7042 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
7043 {
7044         u8 handle = PTR_UINT(data);
7045
7046         return hci_le_terminate_big_sync(hdev, handle,
7047                                          HCI_ERROR_LOCAL_HOST_TERM);
7048 }
7049
7050 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
7051                                            struct sk_buff *skb)
7052 {
7053         struct hci_evt_le_create_big_complete *ev = data;
7054         struct hci_conn *conn;
7055         __u8 i = 0;
7056
7057         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
7058
7059         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
7060                                 flex_array_size(ev, bis_handle, ev->num_bis)))
7061                 return;
7062
7063         hci_dev_lock(hdev);
7064         rcu_read_lock();
7065
7066         /* Connect all BISes that are bound to the BIG */
7067         list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7068                 if (bacmp(&conn->dst, BDADDR_ANY) ||
7069                     conn->type != ISO_LINK ||
7070                     conn->iso_qos.bcast.big != ev->handle)
7071                         continue;
7072
7073                 if (hci_conn_set_handle(conn,
7074                                         __le16_to_cpu(ev->bis_handle[i++])))
7075                         continue;
7076
7077                 if (!ev->status) {
7078                         conn->state = BT_CONNECTED;
7079                         set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
7080                         rcu_read_unlock();
7081                         hci_debugfs_create_conn(conn);
7082                         hci_conn_add_sysfs(conn);
7083                         hci_iso_setup_path(conn);
7084                         rcu_read_lock();
7085                         continue;
7086                 }
7087
7088                 hci_connect_cfm(conn, ev->status);
7089                 rcu_read_unlock();
7090                 hci_conn_del(conn);
7091                 rcu_read_lock();
7092         }
7093
7094         rcu_read_unlock();
7095
7096         if (!ev->status && !i)
7097                 /* If no BISes have been connected for the BIG,
7098                  * terminate. This is in case all bound connections
7099                  * have been closed before the BIG creation
7100                  * has completed.
7101                  */
7102                 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
7103                                    UINT_PTR(ev->handle), NULL);
7104
7105         hci_dev_unlock(hdev);
7106 }
7107
7108 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
7109                                             struct sk_buff *skb)
7110 {
7111         struct hci_evt_le_big_sync_estabilished *ev = data;
7112         struct hci_conn *bis;
7113         struct hci_conn *pa_sync;
7114         int i;
7115
7116         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
7117
7118         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7119                                 flex_array_size(ev, bis, ev->num_bis)))
7120                 return;
7121
7122         hci_dev_lock(hdev);
7123
7124         if (!ev->status) {
7125                 pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
7126                 if (pa_sync)
7127                         /* Also mark the BIG sync established event on the
7128                          * associated PA sync hcon
7129                          */
7130                         set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags);
7131         }
7132
7133         for (i = 0; i < ev->num_bis; i++) {
7134                 u16 handle = le16_to_cpu(ev->bis[i]);
7135                 __le32 interval;
7136
7137                 bis = hci_conn_hash_lookup_handle(hdev, handle);
7138                 if (!bis) {
7139                         bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
7140                                            HCI_ROLE_SLAVE, handle);
7141                         if (!bis)
7142                                 continue;
7143                 }
7144
7145                 if (ev->status != 0x42)
7146                         /* Mark PA sync as established */
7147                         set_bit(HCI_CONN_PA_SYNC, &bis->flags);
7148
7149                 bis->iso_qos.bcast.big = ev->handle;
7150                 memset(&interval, 0, sizeof(interval));
7151                 memcpy(&interval, ev->latency, sizeof(ev->latency));
7152                 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
7153                 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
7154                 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
7155                 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
7156
7157                 if (!ev->status) {
7158                         set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
7159                         hci_iso_setup_path(bis);
7160                 }
7161         }
7162
7163         /* In case BIG sync failed, notify each failed connection to
7164          * the user after all hci connections have been added
7165          */
7166         if (ev->status)
7167                 for (i = 0; i < ev->num_bis; i++) {
7168                         u16 handle = le16_to_cpu(ev->bis[i]);
7169
7170                         bis = hci_conn_hash_lookup_handle(hdev, handle);
7171
7172                         set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
7173                         hci_connect_cfm(bis, ev->status);
7174                 }
7175
7176         hci_dev_unlock(hdev);
7177 }
7178
7179 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7180                                            struct sk_buff *skb)
7181 {
7182         struct hci_evt_le_big_info_adv_report *ev = data;
7183         int mask = hdev->link_mode;
7184         __u8 flags = 0;
7185         struct hci_conn *pa_sync;
7186
7187         bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7188
7189         hci_dev_lock(hdev);
7190
7191         mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
7192         if (!(mask & HCI_LM_ACCEPT)) {
7193                 hci_le_pa_term_sync(hdev, ev->sync_handle);
7194                 goto unlock;
7195         }
7196
7197         if (!(flags & HCI_PROTO_DEFER))
7198                 goto unlock;
7199
7200         pa_sync = hci_conn_hash_lookup_pa_sync_handle
7201                         (hdev,
7202                         le16_to_cpu(ev->sync_handle));
7203
7204         if (pa_sync)
7205                 goto unlock;
7206
7207         /* Add connection to indicate the PA sync event */
7208         pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
7209                                      HCI_ROLE_SLAVE);
7210
7211         if (!pa_sync)
7212                 goto unlock;
7213
7214         pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
7215         set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
7216
7217         /* Notify iso layer */
7218         hci_connect_cfm(pa_sync, 0x00);
7219
7220 unlock:
7221         hci_dev_unlock(hdev);
7222 }
7223
7224 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7225 [_op] = { \
7226         .func = _func, \
7227         .min_len = _min_len, \
7228         .max_len = _max_len, \
7229 }
7230
7231 #define HCI_LE_EV(_op, _func, _len) \
7232         HCI_LE_EV_VL(_op, _func, _len, _len)
7233
7234 #define HCI_LE_EV_STATUS(_op, _func) \
7235         HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7236
7237 /* Entries in this table shall have their position according to the subevent
7238  * opcode they handle so the use of the macros above is recommend since it does
7239  * attempt to initialize at its proper index using Designated Initializers that
7240  * way events without a callback function can be ommited.
7241  */
7242 static const struct hci_le_ev {
7243         void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7244         u16  min_len;
7245         u16  max_len;
7246 } hci_le_ev_table[U8_MAX + 1] = {
7247         /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7248         HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7249                   sizeof(struct hci_ev_le_conn_complete)),
7250         /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7251         HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7252                      sizeof(struct hci_ev_le_advertising_report),
7253                      HCI_MAX_EVENT_SIZE),
7254         /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7255         HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7256                   hci_le_conn_update_complete_evt,
7257                   sizeof(struct hci_ev_le_conn_update_complete)),
7258         /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7259         HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7260                   hci_le_remote_feat_complete_evt,
7261                   sizeof(struct hci_ev_le_remote_feat_complete)),
7262         /* [0x05 = HCI_EV_LE_LTK_REQ] */
7263         HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7264                   sizeof(struct hci_ev_le_ltk_req)),
7265         /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7266         HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7267                   hci_le_remote_conn_param_req_evt,
7268                   sizeof(struct hci_ev_le_remote_conn_param_req)),
7269         /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7270         HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7271                   hci_le_enh_conn_complete_evt,
7272                   sizeof(struct hci_ev_le_enh_conn_complete)),
7273         /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7274         HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7275                      sizeof(struct hci_ev_le_direct_adv_report),
7276                      HCI_MAX_EVENT_SIZE),
7277         /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7278         HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7279                   sizeof(struct hci_ev_le_phy_update_complete)),
7280         /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7281         HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7282                      sizeof(struct hci_ev_le_ext_adv_report),
7283                      HCI_MAX_EVENT_SIZE),
7284         /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7285         HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7286                   hci_le_pa_sync_estabilished_evt,
7287                   sizeof(struct hci_ev_le_pa_sync_established)),
7288         /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7289         HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7290                                  hci_le_per_adv_report_evt,
7291                                  sizeof(struct hci_ev_le_per_adv_report),
7292                                  HCI_MAX_EVENT_SIZE),
7293         /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7294         HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7295                   sizeof(struct hci_evt_le_ext_adv_set_term)),
7296         /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7297         HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7298                   sizeof(struct hci_evt_le_cis_established)),
7299         /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7300         HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7301                   sizeof(struct hci_evt_le_cis_req)),
7302         /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7303         HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7304                      hci_le_create_big_complete_evt,
7305                      sizeof(struct hci_evt_le_create_big_complete),
7306                      HCI_MAX_EVENT_SIZE),
7307         /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7308         HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7309                      hci_le_big_sync_established_evt,
7310                      sizeof(struct hci_evt_le_big_sync_estabilished),
7311                      HCI_MAX_EVENT_SIZE),
7312         /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7313         HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7314                      hci_le_big_info_adv_report_evt,
7315                      sizeof(struct hci_evt_le_big_info_adv_report),
7316                      HCI_MAX_EVENT_SIZE),
7317 };
7318
7319 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7320                             struct sk_buff *skb, u16 *opcode, u8 *status,
7321                             hci_req_complete_t *req_complete,
7322                             hci_req_complete_skb_t *req_complete_skb)
7323 {
7324         struct hci_ev_le_meta *ev = data;
7325         const struct hci_le_ev *subev;
7326
7327         bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7328
7329         /* Only match event if command OGF is for LE */
7330         if (hdev->sent_cmd &&
7331             hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) == 0x08 &&
7332             hci_skb_event(hdev->sent_cmd) == ev->subevent) {
7333                 *opcode = hci_skb_opcode(hdev->sent_cmd);
7334                 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7335                                      req_complete_skb);
7336         }
7337
7338         subev = &hci_le_ev_table[ev->subevent];
7339         if (!subev->func)
7340                 return;
7341
7342         if (skb->len < subev->min_len) {
7343                 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7344                            ev->subevent, skb->len, subev->min_len);
7345                 return;
7346         }
7347
7348         /* Just warn if the length is over max_len size it still be
7349          * possible to partially parse the event so leave to callback to
7350          * decide if that is acceptable.
7351          */
7352         if (skb->len > subev->max_len)
7353                 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7354                             ev->subevent, skb->len, subev->max_len);
7355         data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7356         if (!data)
7357                 return;
7358
7359         subev->func(hdev, data, skb);
7360 }
7361
7362 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7363                                  u8 event, struct sk_buff *skb)
7364 {
7365         struct hci_ev_cmd_complete *ev;
7366         struct hci_event_hdr *hdr;
7367
7368         if (!skb)
7369                 return false;
7370
7371         hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7372         if (!hdr)
7373                 return false;
7374
7375         if (event) {
7376                 if (hdr->evt != event)
7377                         return false;
7378                 return true;
7379         }
7380
7381         /* Check if request ended in Command Status - no way to retrieve
7382          * any extra parameters in this case.
7383          */
7384         if (hdr->evt == HCI_EV_CMD_STATUS)
7385                 return false;
7386
7387         if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7388                 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7389                            hdr->evt);
7390                 return false;
7391         }
7392
7393         ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7394         if (!ev)
7395                 return false;
7396
7397         if (opcode != __le16_to_cpu(ev->opcode)) {
7398                 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7399                        __le16_to_cpu(ev->opcode));
7400                 return false;
7401         }
7402
7403         return true;
7404 }
7405
7406 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7407                                   struct sk_buff *skb)
7408 {
7409         struct hci_ev_le_advertising_info *adv;
7410         struct hci_ev_le_direct_adv_info *direct_adv;
7411         struct hci_ev_le_ext_adv_info *ext_adv;
7412         const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7413         const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7414
7415         hci_dev_lock(hdev);
7416
7417         /* If we are currently suspended and this is the first BT event seen,
7418          * save the wake reason associated with the event.
7419          */
7420         if (!hdev->suspended || hdev->wake_reason)
7421                 goto unlock;
7422
7423         /* Default to remote wake. Values for wake_reason are documented in the
7424          * Bluez mgmt api docs.
7425          */
7426         hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7427
7428         /* Once configured for remote wakeup, we should only wake up for
7429          * reconnections. It's useful to see which device is waking us up so
7430          * keep track of the bdaddr of the connection event that woke us up.
7431          */
7432         if (event == HCI_EV_CONN_REQUEST) {
7433                 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7434                 hdev->wake_addr_type = BDADDR_BREDR;
7435         } else if (event == HCI_EV_CONN_COMPLETE) {
7436                 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7437                 hdev->wake_addr_type = BDADDR_BREDR;
7438         } else if (event == HCI_EV_LE_META) {
7439                 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7440                 u8 subevent = le_ev->subevent;
7441                 u8 *ptr = &skb->data[sizeof(*le_ev)];
7442                 u8 num_reports = *ptr;
7443
7444                 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7445                      subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7446                      subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7447                     num_reports) {
7448                         adv = (void *)(ptr + 1);
7449                         direct_adv = (void *)(ptr + 1);
7450                         ext_adv = (void *)(ptr + 1);
7451
7452                         switch (subevent) {
7453                         case HCI_EV_LE_ADVERTISING_REPORT:
7454                                 bacpy(&hdev->wake_addr, &adv->bdaddr);
7455                                 hdev->wake_addr_type = adv->bdaddr_type;
7456                                 break;
7457                         case HCI_EV_LE_DIRECT_ADV_REPORT:
7458                                 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7459                                 hdev->wake_addr_type = direct_adv->bdaddr_type;
7460                                 break;
7461                         case HCI_EV_LE_EXT_ADV_REPORT:
7462                                 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7463                                 hdev->wake_addr_type = ext_adv->bdaddr_type;
7464                                 break;
7465                         }
7466                 }
7467         } else {
7468                 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7469         }
7470
7471 unlock:
7472         hci_dev_unlock(hdev);
7473 }
7474
7475 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7476 [_op] = { \
7477         .req = false, \
7478         .func = _func, \
7479         .min_len = _min_len, \
7480         .max_len = _max_len, \
7481 }
7482
7483 #define HCI_EV(_op, _func, _len) \
7484         HCI_EV_VL(_op, _func, _len, _len)
7485
7486 #define HCI_EV_STATUS(_op, _func) \
7487         HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7488
7489 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7490 [_op] = { \
7491         .req = true, \
7492         .func_req = _func, \
7493         .min_len = _min_len, \
7494         .max_len = _max_len, \
7495 }
7496
7497 #define HCI_EV_REQ(_op, _func, _len) \
7498         HCI_EV_REQ_VL(_op, _func, _len, _len)
7499
7500 /* Entries in this table shall have their position according to the event opcode
7501  * they handle so the use of the macros above is recommend since it does attempt
7502  * to initialize at its proper index using Designated Initializers that way
7503  * events without a callback function don't have entered.
7504  */
7505 static const struct hci_ev {
7506         bool req;
7507         union {
7508                 void (*func)(struct hci_dev *hdev, void *data,
7509                              struct sk_buff *skb);
7510                 void (*func_req)(struct hci_dev *hdev, void *data,
7511                                  struct sk_buff *skb, u16 *opcode, u8 *status,
7512                                  hci_req_complete_t *req_complete,
7513                                  hci_req_complete_skb_t *req_complete_skb);
7514         };
7515         u16  min_len;
7516         u16  max_len;
7517 } hci_ev_table[U8_MAX + 1] = {
7518         /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7519         HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7520         /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7521         HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7522                   sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7523         /* [0x03 = HCI_EV_CONN_COMPLETE] */
7524         HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7525                sizeof(struct hci_ev_conn_complete)),
7526         /* [0x04 = HCI_EV_CONN_REQUEST] */
7527         HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7528                sizeof(struct hci_ev_conn_request)),
7529         /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7530         HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7531                sizeof(struct hci_ev_disconn_complete)),
7532         /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7533         HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7534                sizeof(struct hci_ev_auth_complete)),
7535         /* [0x07 = HCI_EV_REMOTE_NAME] */
7536         HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7537                sizeof(struct hci_ev_remote_name)),
7538         /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7539         HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7540                sizeof(struct hci_ev_encrypt_change)),
7541         /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7542         HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7543                hci_change_link_key_complete_evt,
7544                sizeof(struct hci_ev_change_link_key_complete)),
7545         /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7546         HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7547                sizeof(struct hci_ev_remote_features)),
7548         /* [0x0e = HCI_EV_CMD_COMPLETE] */
7549         HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7550                       sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7551         /* [0x0f = HCI_EV_CMD_STATUS] */
7552         HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7553                    sizeof(struct hci_ev_cmd_status)),
7554         /* [0x10 = HCI_EV_CMD_STATUS] */
7555         HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7556                sizeof(struct hci_ev_hardware_error)),
7557         /* [0x12 = HCI_EV_ROLE_CHANGE] */
7558         HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7559                sizeof(struct hci_ev_role_change)),
7560         /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7561         HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7562                   sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7563         /* [0x14 = HCI_EV_MODE_CHANGE] */
7564         HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7565                sizeof(struct hci_ev_mode_change)),
7566         /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7567         HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7568                sizeof(struct hci_ev_pin_code_req)),
7569         /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7570         HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7571                sizeof(struct hci_ev_link_key_req)),
7572         /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7573         HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7574                sizeof(struct hci_ev_link_key_notify)),
7575         /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7576         HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7577                sizeof(struct hci_ev_clock_offset)),
7578         /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7579         HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7580                sizeof(struct hci_ev_pkt_type_change)),
7581         /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7582         HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7583                sizeof(struct hci_ev_pscan_rep_mode)),
7584         /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7585         HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7586                   hci_inquiry_result_with_rssi_evt,
7587                   sizeof(struct hci_ev_inquiry_result_rssi),
7588                   HCI_MAX_EVENT_SIZE),
7589         /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7590         HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7591                sizeof(struct hci_ev_remote_ext_features)),
7592         /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7593         HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7594                sizeof(struct hci_ev_sync_conn_complete)),
7595         /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7596         HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7597                   hci_extended_inquiry_result_evt,
7598                   sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7599         /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7600         HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7601                sizeof(struct hci_ev_key_refresh_complete)),
7602         /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7603         HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7604                sizeof(struct hci_ev_io_capa_request)),
7605         /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7606         HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7607                sizeof(struct hci_ev_io_capa_reply)),
7608         /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7609         HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7610                sizeof(struct hci_ev_user_confirm_req)),
7611         /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7612         HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7613                sizeof(struct hci_ev_user_passkey_req)),
7614         /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7615         HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7616                sizeof(struct hci_ev_remote_oob_data_request)),
7617         /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7618         HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7619                sizeof(struct hci_ev_simple_pair_complete)),
7620         /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7621         HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7622                sizeof(struct hci_ev_user_passkey_notify)),
7623         /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7624         HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7625                sizeof(struct hci_ev_keypress_notify)),
7626         /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7627         HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7628                sizeof(struct hci_ev_remote_host_features)),
7629         /* [0x3e = HCI_EV_LE_META] */
7630         HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7631                       sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7632 #if IS_ENABLED(CONFIG_BT_HS)
7633         /* [0x40 = HCI_EV_PHY_LINK_COMPLETE] */
7634         HCI_EV(HCI_EV_PHY_LINK_COMPLETE, hci_phy_link_complete_evt,
7635                sizeof(struct hci_ev_phy_link_complete)),
7636         /* [0x41 = HCI_EV_CHANNEL_SELECTED] */
7637         HCI_EV(HCI_EV_CHANNEL_SELECTED, hci_chan_selected_evt,
7638                sizeof(struct hci_ev_channel_selected)),
7639         /* [0x42 = HCI_EV_DISCONN_PHY_LINK_COMPLETE] */
7640         HCI_EV(HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE,
7641                hci_disconn_loglink_complete_evt,
7642                sizeof(struct hci_ev_disconn_logical_link_complete)),
7643         /* [0x45 = HCI_EV_LOGICAL_LINK_COMPLETE] */
7644         HCI_EV(HCI_EV_LOGICAL_LINK_COMPLETE, hci_loglink_complete_evt,
7645                sizeof(struct hci_ev_logical_link_complete)),
7646         /* [0x46 = HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE] */
7647         HCI_EV(HCI_EV_DISCONN_PHY_LINK_COMPLETE,
7648                hci_disconn_phylink_complete_evt,
7649                sizeof(struct hci_ev_disconn_phy_link_complete)),
7650 #endif
7651         /* [0x48 = HCI_EV_NUM_COMP_BLOCKS] */
7652         HCI_EV(HCI_EV_NUM_COMP_BLOCKS, hci_num_comp_blocks_evt,
7653                sizeof(struct hci_ev_num_comp_blocks)),
7654         /* [0xff = HCI_EV_VENDOR] */
7655         HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7656 };
7657
7658 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7659                            u16 *opcode, u8 *status,
7660                            hci_req_complete_t *req_complete,
7661                            hci_req_complete_skb_t *req_complete_skb)
7662 {
7663         const struct hci_ev *ev = &hci_ev_table[event];
7664         void *data;
7665
7666         if (!ev->func)
7667                 return;
7668
7669         if (skb->len < ev->min_len) {
7670                 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7671                            event, skb->len, ev->min_len);
7672                 return;
7673         }
7674
7675         /* Just warn if the length is over max_len size it still be
7676          * possible to partially parse the event so leave to callback to
7677          * decide if that is acceptable.
7678          */
7679         if (skb->len > ev->max_len)
7680                 bt_dev_warn_ratelimited(hdev,
7681                                         "unexpected event 0x%2.2x length: %u > %u",
7682                                         event, skb->len, ev->max_len);
7683
7684         data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7685         if (!data)
7686                 return;
7687
7688         if (ev->req)
7689                 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7690                              req_complete_skb);
7691         else
7692                 ev->func(hdev, data, skb);
7693 }
7694
7695 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7696 {
7697         struct hci_event_hdr *hdr = (void *) skb->data;
7698         hci_req_complete_t req_complete = NULL;
7699         hci_req_complete_skb_t req_complete_skb = NULL;
7700         struct sk_buff *orig_skb = NULL;
7701         u8 status = 0, event, req_evt = 0;
7702         u16 opcode = HCI_OP_NOP;
7703
7704         if (skb->len < sizeof(*hdr)) {
7705                 bt_dev_err(hdev, "Malformed HCI Event");
7706                 goto done;
7707         }
7708
7709         kfree_skb(hdev->recv_event);
7710         hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7711
7712         event = hdr->evt;
7713         if (!event) {
7714                 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7715                             event);
7716                 goto done;
7717         }
7718
7719         /* Only match event if command OGF is not for LE */
7720         if (hdev->sent_cmd &&
7721             hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) != 0x08 &&
7722             hci_skb_event(hdev->sent_cmd) == event) {
7723                 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->sent_cmd),
7724                                      status, &req_complete, &req_complete_skb);
7725                 req_evt = event;
7726         }
7727
7728         /* If it looks like we might end up having to call
7729          * req_complete_skb, store a pristine copy of the skb since the
7730          * various handlers may modify the original one through
7731          * skb_pull() calls, etc.
7732          */
7733         if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7734             event == HCI_EV_CMD_COMPLETE)
7735                 orig_skb = skb_clone(skb, GFP_KERNEL);
7736
7737         skb_pull(skb, HCI_EVENT_HDR_SIZE);
7738
7739         /* Store wake reason if we're suspended */
7740         hci_store_wake_reason(hdev, event, skb);
7741
7742         bt_dev_dbg(hdev, "event 0x%2.2x", event);
7743
7744         hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7745                        &req_complete_skb);
7746
7747         if (req_complete) {
7748                 req_complete(hdev, status, opcode);
7749         } else if (req_complete_skb) {
7750                 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7751                         kfree_skb(orig_skb);
7752                         orig_skb = NULL;
7753                 }
7754                 req_complete_skb(hdev, status, opcode, orig_skb);
7755         }
7756
7757 done:
7758         kfree_skb(orig_skb);
7759         kfree_skb(skb);
7760         hdev->stat.evt_rx++;
7761 }