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