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 (!bacmp(&hdev->bdaddr, &ev->bdaddr))
3277         {
3278                 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3279                            &ev->bdaddr);
3280                 hci_reject_conn(hdev, &ev->bdaddr);
3281                 return;
3282         }
3283
3284         mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3285                                       &flags);
3286
3287         if (!(mask & HCI_LM_ACCEPT)) {
3288                 hci_reject_conn(hdev, &ev->bdaddr);
3289                 return;
3290         }
3291
3292         hci_dev_lock(hdev);
3293
3294         if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3295                                    BDADDR_BREDR)) {
3296                 hci_reject_conn(hdev, &ev->bdaddr);
3297                 goto unlock;
3298         }
3299
3300         /* Require HCI_CONNECTABLE or an accept list entry to accept the
3301          * connection. These features are only touched through mgmt so
3302          * only do the checks if HCI_MGMT is set.
3303          */
3304         if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3305             !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3306             !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3307                                                BDADDR_BREDR)) {
3308                 hci_reject_conn(hdev, &ev->bdaddr);
3309                 goto unlock;
3310         }
3311
3312         /* Connection accepted */
3313
3314         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3315         if (ie)
3316                 memcpy(ie->data.dev_class, ev->dev_class, 3);
3317
3318         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3319                         &ev->bdaddr);
3320         if (!conn) {
3321                 conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr,
3322                                     HCI_ROLE_SLAVE);
3323                 if (!conn) {
3324                         bt_dev_err(hdev, "no memory for new connection");
3325                         goto unlock;
3326                 }
3327         }
3328
3329         memcpy(conn->dev_class, ev->dev_class, 3);
3330
3331         hci_dev_unlock(hdev);
3332
3333         if (ev->link_type == ACL_LINK ||
3334             (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3335                 struct hci_cp_accept_conn_req cp;
3336                 conn->state = BT_CONNECT;
3337
3338                 bacpy(&cp.bdaddr, &ev->bdaddr);
3339
3340                 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3341                         cp.role = 0x00; /* Become central */
3342                 else
3343                         cp.role = 0x01; /* Remain peripheral */
3344
3345                 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3346         } else if (!(flags & HCI_PROTO_DEFER)) {
3347                 struct hci_cp_accept_sync_conn_req cp;
3348                 conn->state = BT_CONNECT;
3349
3350                 bacpy(&cp.bdaddr, &ev->bdaddr);
3351                 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3352
3353                 cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
3354                 cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
3355                 cp.max_latency    = cpu_to_le16(0xffff);
3356                 cp.content_format = cpu_to_le16(hdev->voice_setting);
3357                 cp.retrans_effort = 0xff;
3358
3359                 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3360                              &cp);
3361         } else {
3362                 conn->state = BT_CONNECT2;
3363                 hci_connect_cfm(conn, 0);
3364         }
3365
3366         return;
3367 unlock:
3368         hci_dev_unlock(hdev);
3369 }
3370
3371 static u8 hci_to_mgmt_reason(u8 err)
3372 {
3373         switch (err) {
3374         case HCI_ERROR_CONNECTION_TIMEOUT:
3375                 return MGMT_DEV_DISCONN_TIMEOUT;
3376         case HCI_ERROR_REMOTE_USER_TERM:
3377         case HCI_ERROR_REMOTE_LOW_RESOURCES:
3378         case HCI_ERROR_REMOTE_POWER_OFF:
3379                 return MGMT_DEV_DISCONN_REMOTE;
3380         case HCI_ERROR_LOCAL_HOST_TERM:
3381                 return MGMT_DEV_DISCONN_LOCAL_HOST;
3382         default:
3383                 return MGMT_DEV_DISCONN_UNKNOWN;
3384         }
3385 }
3386
3387 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3388                                      struct sk_buff *skb)
3389 {
3390         struct hci_ev_disconn_complete *ev = data;
3391         u8 reason;
3392         struct hci_conn_params *params;
3393         struct hci_conn *conn;
3394         bool mgmt_connected;
3395
3396         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3397
3398         hci_dev_lock(hdev);
3399
3400         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3401         if (!conn)
3402                 goto unlock;
3403
3404         if (ev->status) {
3405                 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3406                                        conn->dst_type, ev->status);
3407                 goto unlock;
3408         }
3409
3410         conn->state = BT_CLOSED;
3411
3412         mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3413
3414         if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3415                 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3416         else
3417                 reason = hci_to_mgmt_reason(ev->reason);
3418
3419         mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3420                                 reason, mgmt_connected);
3421
3422         if (conn->type == ACL_LINK) {
3423                 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3424                         hci_remove_link_key(hdev, &conn->dst);
3425
3426                 hci_update_scan(hdev);
3427         }
3428
3429         params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
3430         if (params) {
3431                 switch (params->auto_connect) {
3432                 case HCI_AUTO_CONN_LINK_LOSS:
3433                         if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3434                                 break;
3435                         fallthrough;
3436
3437                 case HCI_AUTO_CONN_DIRECT:
3438                 case HCI_AUTO_CONN_ALWAYS:
3439                         hci_pend_le_list_del_init(params);
3440                         hci_pend_le_list_add(params, &hdev->pend_le_conns);
3441                         hci_update_passive_scan(hdev);
3442                         break;
3443
3444                 default:
3445                         break;
3446                 }
3447         }
3448
3449         hci_disconn_cfm(conn, ev->reason);
3450
3451         /* Re-enable advertising if necessary, since it might
3452          * have been disabled by the connection. From the
3453          * HCI_LE_Set_Advertise_Enable command description in
3454          * the core specification (v4.0):
3455          * "The Controller shall continue advertising until the Host
3456          * issues an LE_Set_Advertise_Enable command with
3457          * Advertising_Enable set to 0x00 (Advertising is disabled)
3458          * or until a connection is created or until the Advertising
3459          * is timed out due to Directed Advertising."
3460          */
3461         if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3462                 hdev->cur_adv_instance = conn->adv_instance;
3463                 hci_enable_advertising(hdev);
3464         }
3465
3466         hci_conn_del(conn);
3467
3468 unlock:
3469         hci_dev_unlock(hdev);
3470 }
3471
3472 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3473                                   struct sk_buff *skb)
3474 {
3475         struct hci_ev_auth_complete *ev = data;
3476         struct hci_conn *conn;
3477
3478         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3479
3480         hci_dev_lock(hdev);
3481
3482         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3483         if (!conn)
3484                 goto unlock;
3485
3486         if (!ev->status) {
3487                 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3488
3489                 if (!hci_conn_ssp_enabled(conn) &&
3490                     test_bit(HCI_CONN_REAUTH_PEND, &conn->flags)) {
3491                         bt_dev_info(hdev, "re-auth of legacy device is not possible.");
3492                 } else {
3493                         set_bit(HCI_CONN_AUTH, &conn->flags);
3494                         conn->sec_level = conn->pending_sec_level;
3495                 }
3496         } else {
3497                 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3498                         set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3499
3500                 mgmt_auth_failed(conn, ev->status);
3501         }
3502
3503         clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3504         clear_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
3505
3506         if (conn->state == BT_CONFIG) {
3507                 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3508                         struct hci_cp_set_conn_encrypt cp;
3509                         cp.handle  = ev->handle;
3510                         cp.encrypt = 0x01;
3511                         hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3512                                      &cp);
3513                 } else {
3514                         conn->state = BT_CONNECTED;
3515                         hci_connect_cfm(conn, ev->status);
3516                         hci_conn_drop(conn);
3517                 }
3518         } else {
3519                 hci_auth_cfm(conn, ev->status);
3520
3521                 hci_conn_hold(conn);
3522                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3523                 hci_conn_drop(conn);
3524         }
3525
3526         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3527                 if (!ev->status) {
3528                         struct hci_cp_set_conn_encrypt cp;
3529                         cp.handle  = ev->handle;
3530                         cp.encrypt = 0x01;
3531                         hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3532                                      &cp);
3533                 } else {
3534                         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3535                         hci_encrypt_cfm(conn, ev->status);
3536                 }
3537         }
3538
3539 unlock:
3540         hci_dev_unlock(hdev);
3541 }
3542
3543 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3544                                 struct sk_buff *skb)
3545 {
3546         struct hci_ev_remote_name *ev = data;
3547         struct hci_conn *conn;
3548
3549         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3550
3551         hci_conn_check_pending(hdev);
3552
3553         hci_dev_lock(hdev);
3554
3555         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3556
3557         if (!hci_dev_test_flag(hdev, HCI_MGMT))
3558                 goto check_auth;
3559
3560         if (ev->status == 0)
3561                 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3562                                        strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3563         else
3564                 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3565
3566 check_auth:
3567         if (!conn)
3568                 goto unlock;
3569
3570         if (!hci_outgoing_auth_needed(hdev, conn))
3571                 goto unlock;
3572
3573         if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3574                 struct hci_cp_auth_requested cp;
3575
3576                 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3577
3578                 cp.handle = __cpu_to_le16(conn->handle);
3579                 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3580         }
3581
3582 unlock:
3583         hci_dev_unlock(hdev);
3584 }
3585
3586 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3587                                    struct sk_buff *skb)
3588 {
3589         struct hci_ev_encrypt_change *ev = data;
3590         struct hci_conn *conn;
3591
3592         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3593
3594         hci_dev_lock(hdev);
3595
3596         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3597         if (!conn)
3598                 goto unlock;
3599
3600         if (!ev->status) {
3601                 if (ev->encrypt) {
3602                         /* Encryption implies authentication */
3603                         set_bit(HCI_CONN_AUTH, &conn->flags);
3604                         set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3605                         conn->sec_level = conn->pending_sec_level;
3606
3607                         /* P-256 authentication key implies FIPS */
3608                         if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3609                                 set_bit(HCI_CONN_FIPS, &conn->flags);
3610
3611                         if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3612                             conn->type == LE_LINK)
3613                                 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3614                 } else {
3615                         clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3616                         clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3617                 }
3618         }
3619
3620         /* We should disregard the current RPA and generate a new one
3621          * whenever the encryption procedure fails.
3622          */
3623         if (ev->status && conn->type == LE_LINK) {
3624                 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3625                 hci_adv_instances_set_rpa_expired(hdev, true);
3626         }
3627
3628         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3629
3630         /* Check link security requirements are met */
3631         if (!hci_conn_check_link_mode(conn))
3632                 ev->status = HCI_ERROR_AUTH_FAILURE;
3633
3634         if (ev->status && conn->state == BT_CONNECTED) {
3635                 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3636                         set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3637
3638                 /* Notify upper layers so they can cleanup before
3639                  * disconnecting.
3640                  */
3641                 hci_encrypt_cfm(conn, ev->status);
3642                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3643                 hci_conn_drop(conn);
3644                 goto unlock;
3645         }
3646
3647         /* Try reading the encryption key size for encrypted ACL links */
3648         if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3649                 struct hci_cp_read_enc_key_size cp;
3650
3651                 /* Only send HCI_Read_Encryption_Key_Size if the
3652                  * controller really supports it. If it doesn't, assume
3653                  * the default size (16).
3654                  */
3655                 if (!(hdev->commands[20] & 0x10)) {
3656                         conn->enc_key_size = HCI_LINK_KEY_SIZE;
3657                         goto notify;
3658                 }
3659
3660                 cp.handle = cpu_to_le16(conn->handle);
3661                 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3662                                  sizeof(cp), &cp)) {
3663                         bt_dev_err(hdev, "sending read key size failed");
3664                         conn->enc_key_size = HCI_LINK_KEY_SIZE;
3665                         goto notify;
3666                 }
3667
3668                 goto unlock;
3669         }
3670
3671         /* Set the default Authenticated Payload Timeout after
3672          * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3673          * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3674          * sent when the link is active and Encryption is enabled, the conn
3675          * type can be either LE or ACL and controller must support LMP Ping.
3676          * Ensure for AES-CCM encryption as well.
3677          */
3678         if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3679             test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3680             ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3681              (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3682                 struct hci_cp_write_auth_payload_to cp;
3683
3684                 cp.handle = cpu_to_le16(conn->handle);
3685                 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3686                 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3687                                  sizeof(cp), &cp)) {
3688                         bt_dev_err(hdev, "write auth payload timeout failed");
3689                         goto notify;
3690                 }
3691
3692                 goto unlock;
3693         }
3694
3695 notify:
3696         hci_encrypt_cfm(conn, ev->status);
3697
3698 unlock:
3699         hci_dev_unlock(hdev);
3700 }
3701
3702 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3703                                              struct sk_buff *skb)
3704 {
3705         struct hci_ev_change_link_key_complete *ev = data;
3706         struct hci_conn *conn;
3707
3708         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3709
3710         hci_dev_lock(hdev);
3711
3712         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3713         if (conn) {
3714                 if (!ev->status)
3715                         set_bit(HCI_CONN_SECURE, &conn->flags);
3716
3717                 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3718
3719                 hci_key_change_cfm(conn, ev->status);
3720         }
3721
3722         hci_dev_unlock(hdev);
3723 }
3724
3725 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3726                                     struct sk_buff *skb)
3727 {
3728         struct hci_ev_remote_features *ev = data;
3729         struct hci_conn *conn;
3730
3731         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3732
3733         hci_dev_lock(hdev);
3734
3735         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3736         if (!conn)
3737                 goto unlock;
3738
3739         if (!ev->status)
3740                 memcpy(conn->features[0], ev->features, 8);
3741
3742         if (conn->state != BT_CONFIG)
3743                 goto unlock;
3744
3745         if (!ev->status && lmp_ext_feat_capable(hdev) &&
3746             lmp_ext_feat_capable(conn)) {
3747                 struct hci_cp_read_remote_ext_features cp;
3748                 cp.handle = ev->handle;
3749                 cp.page = 0x01;
3750                 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3751                              sizeof(cp), &cp);
3752                 goto unlock;
3753         }
3754
3755         if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
3756                 struct hci_cp_remote_name_req cp;
3757                 memset(&cp, 0, sizeof(cp));
3758                 bacpy(&cp.bdaddr, &conn->dst);
3759                 cp.pscan_rep_mode = 0x02;
3760                 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3761         } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
3762                 mgmt_device_connected(hdev, conn, NULL, 0);
3763
3764         if (!hci_outgoing_auth_needed(hdev, conn)) {
3765                 conn->state = BT_CONNECTED;
3766                 hci_connect_cfm(conn, ev->status);
3767                 hci_conn_drop(conn);
3768         }
3769
3770 unlock:
3771         hci_dev_unlock(hdev);
3772 }
3773
3774 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3775 {
3776         cancel_delayed_work(&hdev->cmd_timer);
3777
3778         rcu_read_lock();
3779         if (!test_bit(HCI_RESET, &hdev->flags)) {
3780                 if (ncmd) {
3781                         cancel_delayed_work(&hdev->ncmd_timer);
3782                         atomic_set(&hdev->cmd_cnt, 1);
3783                 } else {
3784                         if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3785                                 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3786                                                    HCI_NCMD_TIMEOUT);
3787                 }
3788         }
3789         rcu_read_unlock();
3790 }
3791
3792 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3793                                         struct sk_buff *skb)
3794 {
3795         struct hci_rp_le_read_buffer_size_v2 *rp = data;
3796
3797         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3798
3799         if (rp->status)
3800                 return rp->status;
3801
3802         hdev->le_mtu   = __le16_to_cpu(rp->acl_mtu);
3803         hdev->le_pkts  = rp->acl_max_pkt;
3804         hdev->iso_mtu  = __le16_to_cpu(rp->iso_mtu);
3805         hdev->iso_pkts = rp->iso_max_pkt;
3806
3807         hdev->le_cnt  = hdev->le_pkts;
3808         hdev->iso_cnt = hdev->iso_pkts;
3809
3810         BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3811                hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3812
3813         return rp->status;
3814 }
3815
3816 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3817 {
3818         struct hci_conn *conn, *tmp;
3819
3820         lockdep_assert_held(&hdev->lock);
3821
3822         list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3823                 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3824                     conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3825                         continue;
3826
3827                 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3828                         hci_conn_failed(conn, status);
3829         }
3830 }
3831
3832 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3833                                    struct sk_buff *skb)
3834 {
3835         struct hci_rp_le_set_cig_params *rp = data;
3836         struct hci_cp_le_set_cig_params *cp;
3837         struct hci_conn *conn;
3838         u8 status = rp->status;
3839         bool pending = false;
3840         int i;
3841
3842         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3843
3844         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3845         if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3846                             rp->cig_id != cp->cig_id)) {
3847                 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3848                 status = HCI_ERROR_UNSPECIFIED;
3849         }
3850
3851         hci_dev_lock(hdev);
3852
3853         /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3854          *
3855          * If the Status return parameter is non-zero, then the state of the CIG
3856          * and its CIS configurations shall not be changed by the command. If
3857          * the CIG did not already exist, it shall not be created.
3858          */
3859         if (status) {
3860                 /* Keep current configuration, fail only the unbound CIS */
3861                 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3862                 goto unlock;
3863         }
3864
3865         /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3866          *
3867          * If the Status return parameter is zero, then the Controller shall
3868          * set the Connection_Handle arrayed return parameter to the connection
3869          * handle(s) corresponding to the CIS configurations specified in
3870          * the CIS_IDs command parameter, in the same order.
3871          */
3872         for (i = 0; i < rp->num_handles; ++i) {
3873                 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3874                                                 cp->cis[i].cis_id);
3875                 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3876                         continue;
3877
3878                 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3879                         continue;
3880
3881                 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3882                         continue;
3883
3884                 if (conn->state == BT_CONNECT)
3885                         pending = true;
3886         }
3887
3888 unlock:
3889         if (pending)
3890                 hci_le_create_cis_pending(hdev);
3891
3892         hci_dev_unlock(hdev);
3893
3894         return rp->status;
3895 }
3896
3897 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3898                                    struct sk_buff *skb)
3899 {
3900         struct hci_rp_le_setup_iso_path *rp = data;
3901         struct hci_cp_le_setup_iso_path *cp;
3902         struct hci_conn *conn;
3903
3904         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3905
3906         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3907         if (!cp)
3908                 return rp->status;
3909
3910         hci_dev_lock(hdev);
3911
3912         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3913         if (!conn)
3914                 goto unlock;
3915
3916         if (rp->status) {
3917                 hci_connect_cfm(conn, rp->status);
3918                 hci_conn_del(conn);
3919                 goto unlock;
3920         }
3921
3922         switch (cp->direction) {
3923         /* Input (Host to Controller) */
3924         case 0x00:
3925                 /* Only confirm connection if output only */
3926                 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3927                         hci_connect_cfm(conn, rp->status);
3928                 break;
3929         /* Output (Controller to Host) */
3930         case 0x01:
3931                 /* Confirm connection since conn->iso_qos is always configured
3932                  * last.
3933                  */
3934                 hci_connect_cfm(conn, rp->status);
3935                 break;
3936         }
3937
3938 unlock:
3939         hci_dev_unlock(hdev);
3940         return rp->status;
3941 }
3942
3943 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3944 {
3945         bt_dev_dbg(hdev, "status 0x%2.2x", status);
3946 }
3947
3948 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3949                                    struct sk_buff *skb)
3950 {
3951         struct hci_ev_status *rp = data;
3952         struct hci_cp_le_set_per_adv_params *cp;
3953
3954         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3955
3956         if (rp->status)
3957                 return rp->status;
3958
3959         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3960         if (!cp)
3961                 return rp->status;
3962
3963         /* TODO: set the conn state */
3964         return rp->status;
3965 }
3966
3967 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3968                                        struct sk_buff *skb)
3969 {
3970         struct hci_ev_status *rp = data;
3971         struct hci_cp_le_set_per_adv_enable *cp;
3972         struct adv_info *adv = NULL, *n;
3973         u8 per_adv_cnt = 0;
3974
3975         bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3976
3977         if (rp->status)
3978                 return rp->status;
3979
3980         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3981         if (!cp)
3982                 return rp->status;
3983
3984         hci_dev_lock(hdev);
3985
3986         adv = hci_find_adv_instance(hdev, cp->handle);
3987
3988         if (cp->enable) {
3989                 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3990
3991                 if (adv)
3992                         adv->enabled = true;
3993         } else {
3994                 /* If just one instance was disabled check if there are
3995                  * any other instance enabled before clearing HCI_LE_PER_ADV.
3996                  * The current periodic adv instance will be marked as
3997                  * disabled once extended advertising is also disabled.
3998                  */
3999                 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
4000                                          list) {
4001                         if (adv->periodic && adv->enabled)
4002                                 per_adv_cnt++;
4003                 }
4004
4005                 if (per_adv_cnt > 1)
4006                         goto unlock;
4007
4008                 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
4009         }
4010
4011 unlock:
4012         hci_dev_unlock(hdev);
4013
4014         return rp->status;
4015 }
4016
4017 #define HCI_CC_VL(_op, _func, _min, _max) \
4018 { \
4019         .op = _op, \
4020         .func = _func, \
4021         .min_len = _min, \
4022         .max_len = _max, \
4023 }
4024
4025 #define HCI_CC(_op, _func, _len) \
4026         HCI_CC_VL(_op, _func, _len, _len)
4027
4028 #define HCI_CC_STATUS(_op, _func) \
4029         HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4030
4031 static const struct hci_cc {
4032         u16  op;
4033         u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4034         u16  min_len;
4035         u16  max_len;
4036 } hci_cc_table[] = {
4037         HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4038         HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4039         HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4040         HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4041                       hci_cc_remote_name_req_cancel),
4042         HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4043                sizeof(struct hci_rp_role_discovery)),
4044         HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4045                sizeof(struct hci_rp_read_link_policy)),
4046         HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4047                sizeof(struct hci_rp_write_link_policy)),
4048         HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4049                sizeof(struct hci_rp_read_def_link_policy)),
4050         HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4051                       hci_cc_write_def_link_policy),
4052         HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4053         HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4054                sizeof(struct hci_rp_read_stored_link_key)),
4055         HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4056                sizeof(struct hci_rp_delete_stored_link_key)),
4057         HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4058         HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4059                sizeof(struct hci_rp_read_local_name)),
4060         HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4061         HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4062         HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4063         HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4064         HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4065                sizeof(struct hci_rp_read_class_of_dev)),
4066         HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4067         HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4068                sizeof(struct hci_rp_read_voice_setting)),
4069         HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4070         HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4071                sizeof(struct hci_rp_read_num_supported_iac)),
4072         HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4073         HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4074         HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4075                sizeof(struct hci_rp_read_auth_payload_to)),
4076         HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4077                sizeof(struct hci_rp_write_auth_payload_to)),
4078         HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4079                sizeof(struct hci_rp_read_local_version)),
4080         HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4081                sizeof(struct hci_rp_read_local_commands)),
4082         HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4083                sizeof(struct hci_rp_read_local_features)),
4084         HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4085                sizeof(struct hci_rp_read_local_ext_features)),
4086         HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4087                sizeof(struct hci_rp_read_buffer_size)),
4088         HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4089                sizeof(struct hci_rp_read_bd_addr)),
4090         HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4091                sizeof(struct hci_rp_read_local_pairing_opts)),
4092         HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4093                sizeof(struct hci_rp_read_page_scan_activity)),
4094         HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4095                       hci_cc_write_page_scan_activity),
4096         HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4097                sizeof(struct hci_rp_read_page_scan_type)),
4098         HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4099         HCI_CC(HCI_OP_READ_DATA_BLOCK_SIZE, hci_cc_read_data_block_size,
4100                sizeof(struct hci_rp_read_data_block_size)),
4101         HCI_CC(HCI_OP_READ_FLOW_CONTROL_MODE, hci_cc_read_flow_control_mode,
4102                sizeof(struct hci_rp_read_flow_control_mode)),
4103         HCI_CC(HCI_OP_READ_LOCAL_AMP_INFO, hci_cc_read_local_amp_info,
4104                sizeof(struct hci_rp_read_local_amp_info)),
4105         HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4106                sizeof(struct hci_rp_read_clock)),
4107         HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4108                sizeof(struct hci_rp_read_enc_key_size)),
4109         HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4110                sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4111         HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4112                hci_cc_read_def_err_data_reporting,
4113                sizeof(struct hci_rp_read_def_err_data_reporting)),
4114         HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4115                       hci_cc_write_def_err_data_reporting),
4116         HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4117                sizeof(struct hci_rp_pin_code_reply)),
4118         HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4119                sizeof(struct hci_rp_pin_code_neg_reply)),
4120         HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4121                sizeof(struct hci_rp_read_local_oob_data)),
4122         HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4123                sizeof(struct hci_rp_read_local_oob_ext_data)),
4124         HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4125                sizeof(struct hci_rp_le_read_buffer_size)),
4126         HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4127                sizeof(struct hci_rp_le_read_local_features)),
4128         HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4129                sizeof(struct hci_rp_le_read_adv_tx_power)),
4130         HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4131                sizeof(struct hci_rp_user_confirm_reply)),
4132         HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4133                sizeof(struct hci_rp_user_confirm_reply)),
4134         HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4135                sizeof(struct hci_rp_user_confirm_reply)),
4136         HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4137                sizeof(struct hci_rp_user_confirm_reply)),
4138         HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4139         HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4140         HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4141         HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4142         HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4143                hci_cc_le_read_accept_list_size,
4144                sizeof(struct hci_rp_le_read_accept_list_size)),
4145         HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4146         HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4147                       hci_cc_le_add_to_accept_list),
4148         HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4149                       hci_cc_le_del_from_accept_list),
4150         HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4151                sizeof(struct hci_rp_le_read_supported_states)),
4152         HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4153                sizeof(struct hci_rp_le_read_def_data_len)),
4154         HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4155                       hci_cc_le_write_def_data_len),
4156         HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4157                       hci_cc_le_add_to_resolv_list),
4158         HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4159                       hci_cc_le_del_from_resolv_list),
4160         HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4161                       hci_cc_le_clear_resolv_list),
4162         HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4163                sizeof(struct hci_rp_le_read_resolv_list_size)),
4164         HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4165                       hci_cc_le_set_addr_resolution_enable),
4166         HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4167                sizeof(struct hci_rp_le_read_max_data_len)),
4168         HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4169                       hci_cc_write_le_host_supported),
4170         HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4171         HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4172                sizeof(struct hci_rp_read_rssi)),
4173         HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4174                sizeof(struct hci_rp_read_tx_power)),
4175         HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4176         HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4177                       hci_cc_le_set_ext_scan_param),
4178         HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4179                       hci_cc_le_set_ext_scan_enable),
4180         HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4181         HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4182                hci_cc_le_read_num_adv_sets,
4183                sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4184         HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4185                sizeof(struct hci_rp_le_set_ext_adv_params)),
4186         HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4187                       hci_cc_le_set_ext_adv_enable),
4188         HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4189                       hci_cc_le_set_adv_set_random_addr),
4190         HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4191         HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4192         HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4193         HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4194                       hci_cc_le_set_per_adv_enable),
4195         HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4196                sizeof(struct hci_rp_le_read_transmit_power)),
4197         HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4198         HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4199                sizeof(struct hci_rp_le_read_buffer_size_v2)),
4200         HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4201                   sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4202         HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4203                sizeof(struct hci_rp_le_setup_iso_path)),
4204 };
4205
4206 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4207                       struct sk_buff *skb)
4208 {
4209         void *data;
4210
4211         if (skb->len < cc->min_len) {
4212                 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4213                            cc->op, skb->len, cc->min_len);
4214                 return HCI_ERROR_UNSPECIFIED;
4215         }
4216
4217         /* Just warn if the length is over max_len size it still be possible to
4218          * partially parse the cc so leave to callback to decide if that is
4219          * acceptable.
4220          */
4221         if (skb->len > cc->max_len)
4222                 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4223                             cc->op, skb->len, cc->max_len);
4224
4225         data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4226         if (!data)
4227                 return HCI_ERROR_UNSPECIFIED;
4228
4229         return cc->func(hdev, data, skb);
4230 }
4231
4232 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4233                                  struct sk_buff *skb, u16 *opcode, u8 *status,
4234                                  hci_req_complete_t *req_complete,
4235                                  hci_req_complete_skb_t *req_complete_skb)
4236 {
4237         struct hci_ev_cmd_complete *ev = data;
4238         int i;
4239
4240         *opcode = __le16_to_cpu(ev->opcode);
4241
4242         bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4243
4244         for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4245                 if (hci_cc_table[i].op == *opcode) {
4246                         *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4247                         break;
4248                 }
4249         }
4250
4251         if (i == ARRAY_SIZE(hci_cc_table)) {
4252                 /* Unknown opcode, assume byte 0 contains the status, so
4253                  * that e.g. __hci_cmd_sync() properly returns errors
4254                  * for vendor specific commands send by HCI drivers.
4255                  * If a vendor doesn't actually follow this convention we may
4256                  * need to introduce a vendor CC table in order to properly set
4257                  * the status.
4258                  */
4259                 *status = skb->data[0];
4260         }
4261
4262         handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4263
4264         hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4265                              req_complete_skb);
4266
4267         if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4268                 bt_dev_err(hdev,
4269                            "unexpected event for opcode 0x%4.4x", *opcode);
4270                 return;
4271         }
4272
4273         if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4274                 queue_work(hdev->workqueue, &hdev->cmd_work);
4275 }
4276
4277 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4278 {
4279         struct hci_cp_le_create_cis *cp;
4280         bool pending = false;
4281         int i;
4282
4283         bt_dev_dbg(hdev, "status 0x%2.2x", status);
4284
4285         if (!status)
4286                 return;
4287
4288         cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4289         if (!cp)
4290                 return;
4291
4292         hci_dev_lock(hdev);
4293
4294         /* Remove connection if command failed */
4295         for (i = 0; cp->num_cis; cp->num_cis--, i++) {
4296                 struct hci_conn *conn;
4297                 u16 handle;
4298
4299                 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4300
4301                 conn = hci_conn_hash_lookup_handle(hdev, handle);
4302                 if (conn) {
4303                         if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4304                                                &conn->flags))
4305                                 pending = true;
4306                         conn->state = BT_CLOSED;
4307                         hci_connect_cfm(conn, status);
4308                         hci_conn_del(conn);
4309                 }
4310         }
4311
4312         if (pending)
4313                 hci_le_create_cis_pending(hdev);
4314
4315         hci_dev_unlock(hdev);
4316 }
4317
4318 #define HCI_CS(_op, _func) \
4319 { \
4320         .op = _op, \
4321         .func = _func, \
4322 }
4323
4324 static const struct hci_cs {
4325         u16  op;
4326         void (*func)(struct hci_dev *hdev, __u8 status);
4327 } hci_cs_table[] = {
4328         HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4329         HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4330         HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4331         HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4332         HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4333         HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4334         HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4335         HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4336         HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4337                hci_cs_read_remote_ext_features),
4338         HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4339         HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4340                hci_cs_enhanced_setup_sync_conn),
4341         HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4342         HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4343         HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4344         HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4345         HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4346         HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4347         HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4348         HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4349         HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4350 };
4351
4352 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4353                                struct sk_buff *skb, u16 *opcode, u8 *status,
4354                                hci_req_complete_t *req_complete,
4355                                hci_req_complete_skb_t *req_complete_skb)
4356 {
4357         struct hci_ev_cmd_status *ev = data;
4358         int i;
4359
4360         *opcode = __le16_to_cpu(ev->opcode);
4361         *status = ev->status;
4362
4363         bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4364
4365         for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4366                 if (hci_cs_table[i].op == *opcode) {
4367                         hci_cs_table[i].func(hdev, ev->status);
4368                         break;
4369                 }
4370         }
4371
4372         handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4373
4374         /* Indicate request completion if the command failed. Also, if
4375          * we're not waiting for a special event and we get a success
4376          * command status we should try to flag the request as completed
4377          * (since for this kind of commands there will not be a command
4378          * complete event).
4379          */
4380         if (ev->status || (hdev->sent_cmd && !hci_skb_event(hdev->sent_cmd))) {
4381                 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4382                                      req_complete_skb);
4383                 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4384                         bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4385                                    *opcode);
4386                         return;
4387                 }
4388         }
4389
4390         if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4391                 queue_work(hdev->workqueue, &hdev->cmd_work);
4392 }
4393
4394 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4395                                    struct sk_buff *skb)
4396 {
4397         struct hci_ev_hardware_error *ev = data;
4398
4399         bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4400
4401         hdev->hw_error_code = ev->code;
4402
4403         queue_work(hdev->req_workqueue, &hdev->error_reset);
4404 }
4405
4406 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4407                                 struct sk_buff *skb)
4408 {
4409         struct hci_ev_role_change *ev = data;
4410         struct hci_conn *conn;
4411
4412         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4413
4414         hci_dev_lock(hdev);
4415
4416         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4417         if (conn) {
4418                 if (!ev->status)
4419                         conn->role = ev->role;
4420
4421                 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4422
4423                 hci_role_switch_cfm(conn, ev->status, ev->role);
4424         }
4425
4426         hci_dev_unlock(hdev);
4427 }
4428
4429 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4430                                   struct sk_buff *skb)
4431 {
4432         struct hci_ev_num_comp_pkts *ev = data;
4433         int i;
4434
4435         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4436                              flex_array_size(ev, handles, ev->num)))
4437                 return;
4438
4439         if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_PACKET_BASED) {
4440                 bt_dev_err(hdev, "wrong event for mode %d", hdev->flow_ctl_mode);
4441                 return;
4442         }
4443
4444         bt_dev_dbg(hdev, "num %d", ev->num);
4445
4446         for (i = 0; i < ev->num; i++) {
4447                 struct hci_comp_pkts_info *info = &ev->handles[i];
4448                 struct hci_conn *conn;
4449                 __u16  handle, count;
4450
4451                 handle = __le16_to_cpu(info->handle);
4452                 count  = __le16_to_cpu(info->count);
4453
4454                 conn = hci_conn_hash_lookup_handle(hdev, handle);
4455                 if (!conn)
4456                         continue;
4457
4458                 conn->sent -= count;
4459
4460                 switch (conn->type) {
4461                 case ACL_LINK:
4462                         hdev->acl_cnt += count;
4463                         if (hdev->acl_cnt > hdev->acl_pkts)
4464                                 hdev->acl_cnt = hdev->acl_pkts;
4465                         break;
4466
4467                 case LE_LINK:
4468                         if (hdev->le_pkts) {
4469                                 hdev->le_cnt += count;
4470                                 if (hdev->le_cnt > hdev->le_pkts)
4471                                         hdev->le_cnt = hdev->le_pkts;
4472                         } else {
4473                                 hdev->acl_cnt += count;
4474                                 if (hdev->acl_cnt > hdev->acl_pkts)
4475                                         hdev->acl_cnt = hdev->acl_pkts;
4476                         }
4477                         break;
4478
4479                 case SCO_LINK:
4480                         hdev->sco_cnt += count;
4481                         if (hdev->sco_cnt > hdev->sco_pkts)
4482                                 hdev->sco_cnt = hdev->sco_pkts;
4483                         break;
4484
4485                 case ISO_LINK:
4486                         if (hdev->iso_pkts) {
4487                                 hdev->iso_cnt += count;
4488                                 if (hdev->iso_cnt > hdev->iso_pkts)
4489                                         hdev->iso_cnt = hdev->iso_pkts;
4490                         } else if (hdev->le_pkts) {
4491                                 hdev->le_cnt += count;
4492                                 if (hdev->le_cnt > hdev->le_pkts)
4493                                         hdev->le_cnt = hdev->le_pkts;
4494                         } else {
4495                                 hdev->acl_cnt += count;
4496                                 if (hdev->acl_cnt > hdev->acl_pkts)
4497                                         hdev->acl_cnt = hdev->acl_pkts;
4498                         }
4499                         break;
4500
4501                 default:
4502                         bt_dev_err(hdev, "unknown type %d conn %p",
4503                                    conn->type, conn);
4504                         break;
4505                 }
4506         }
4507
4508         queue_work(hdev->workqueue, &hdev->tx_work);
4509 }
4510
4511 static struct hci_conn *__hci_conn_lookup_handle(struct hci_dev *hdev,
4512                                                  __u16 handle)
4513 {
4514         struct hci_chan *chan;
4515
4516         switch (hdev->dev_type) {
4517         case HCI_PRIMARY:
4518                 return hci_conn_hash_lookup_handle(hdev, handle);
4519         case HCI_AMP:
4520                 chan = hci_chan_lookup_handle(hdev, handle);
4521                 if (chan)
4522                         return chan->conn;
4523                 break;
4524         default:
4525                 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
4526                 break;
4527         }
4528
4529         return NULL;
4530 }
4531
4532 static void hci_num_comp_blocks_evt(struct hci_dev *hdev, void *data,
4533                                     struct sk_buff *skb)
4534 {
4535         struct hci_ev_num_comp_blocks *ev = data;
4536         int i;
4537
4538         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_BLOCKS,
4539                              flex_array_size(ev, handles, ev->num_hndl)))
4540                 return;
4541
4542         if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_BLOCK_BASED) {
4543                 bt_dev_err(hdev, "wrong event for mode %d",
4544                            hdev->flow_ctl_mode);
4545                 return;
4546         }
4547
4548         bt_dev_dbg(hdev, "num_blocks %d num_hndl %d", ev->num_blocks,
4549                    ev->num_hndl);
4550
4551         for (i = 0; i < ev->num_hndl; i++) {
4552                 struct hci_comp_blocks_info *info = &ev->handles[i];
4553                 struct hci_conn *conn = NULL;
4554                 __u16  handle, block_count;
4555
4556                 handle = __le16_to_cpu(info->handle);
4557                 block_count = __le16_to_cpu(info->blocks);
4558
4559                 conn = __hci_conn_lookup_handle(hdev, handle);
4560                 if (!conn)
4561                         continue;
4562
4563                 conn->sent -= block_count;
4564
4565                 switch (conn->type) {
4566                 case ACL_LINK:
4567                 case AMP_LINK:
4568                         hdev->block_cnt += block_count;
4569                         if (hdev->block_cnt > hdev->num_blocks)
4570                                 hdev->block_cnt = hdev->num_blocks;
4571                         break;
4572
4573                 default:
4574                         bt_dev_err(hdev, "unknown type %d conn %p",
4575                                    conn->type, conn);
4576                         break;
4577                 }
4578         }
4579
4580         queue_work(hdev->workqueue, &hdev->tx_work);
4581 }
4582
4583 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4584                                 struct sk_buff *skb)
4585 {
4586         struct hci_ev_mode_change *ev = data;
4587         struct hci_conn *conn;
4588
4589         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4590
4591         hci_dev_lock(hdev);
4592
4593         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4594         if (conn) {
4595                 conn->mode = ev->mode;
4596
4597                 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4598                                         &conn->flags)) {
4599                         if (conn->mode == HCI_CM_ACTIVE)
4600                                 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4601                         else
4602                                 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4603                 }
4604
4605                 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4606                         hci_sco_setup(conn, ev->status);
4607         }
4608
4609         hci_dev_unlock(hdev);
4610 }
4611
4612 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4613                                      struct sk_buff *skb)
4614 {
4615         struct hci_ev_pin_code_req *ev = data;
4616         struct hci_conn *conn;
4617
4618         bt_dev_dbg(hdev, "");
4619
4620         hci_dev_lock(hdev);
4621
4622         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4623         if (!conn)
4624                 goto unlock;
4625
4626         if (conn->state == BT_CONNECTED) {
4627                 hci_conn_hold(conn);
4628                 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4629                 hci_conn_drop(conn);
4630         }
4631
4632         if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4633             !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4634                 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4635                              sizeof(ev->bdaddr), &ev->bdaddr);
4636         } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4637                 u8 secure;
4638
4639                 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4640                         secure = 1;
4641                 else
4642                         secure = 0;
4643
4644                 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4645         }
4646
4647 unlock:
4648         hci_dev_unlock(hdev);
4649 }
4650
4651 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4652 {
4653         if (key_type == HCI_LK_CHANGED_COMBINATION)
4654                 return;
4655
4656         conn->pin_length = pin_len;
4657         conn->key_type = key_type;
4658
4659         switch (key_type) {
4660         case HCI_LK_LOCAL_UNIT:
4661         case HCI_LK_REMOTE_UNIT:
4662         case HCI_LK_DEBUG_COMBINATION:
4663                 return;
4664         case HCI_LK_COMBINATION:
4665                 if (pin_len == 16)
4666                         conn->pending_sec_level = BT_SECURITY_HIGH;
4667                 else
4668                         conn->pending_sec_level = BT_SECURITY_MEDIUM;
4669                 break;
4670         case HCI_LK_UNAUTH_COMBINATION_P192:
4671         case HCI_LK_UNAUTH_COMBINATION_P256:
4672                 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4673                 break;
4674         case HCI_LK_AUTH_COMBINATION_P192:
4675                 conn->pending_sec_level = BT_SECURITY_HIGH;
4676                 break;
4677         case HCI_LK_AUTH_COMBINATION_P256:
4678                 conn->pending_sec_level = BT_SECURITY_FIPS;
4679                 break;
4680         }
4681 }
4682
4683 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4684                                      struct sk_buff *skb)
4685 {
4686         struct hci_ev_link_key_req *ev = data;
4687         struct hci_cp_link_key_reply cp;
4688         struct hci_conn *conn;
4689         struct link_key *key;
4690
4691         bt_dev_dbg(hdev, "");
4692
4693         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4694                 return;
4695
4696         hci_dev_lock(hdev);
4697
4698         key = hci_find_link_key(hdev, &ev->bdaddr);
4699         if (!key) {
4700                 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4701                 goto not_found;
4702         }
4703
4704         bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4705
4706         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4707         if (conn) {
4708                 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4709
4710                 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4711                      key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4712                     conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4713                         bt_dev_dbg(hdev, "ignoring unauthenticated key");
4714                         goto not_found;
4715                 }
4716
4717                 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4718                     (conn->pending_sec_level == BT_SECURITY_HIGH ||
4719                      conn->pending_sec_level == BT_SECURITY_FIPS)) {
4720                         bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4721                         goto not_found;
4722                 }
4723
4724                 conn_set_key(conn, key->type, key->pin_len);
4725         }
4726
4727         bacpy(&cp.bdaddr, &ev->bdaddr);
4728         memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4729
4730         hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4731
4732         hci_dev_unlock(hdev);
4733
4734         return;
4735
4736 not_found:
4737         hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4738         hci_dev_unlock(hdev);
4739 }
4740
4741 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4742                                     struct sk_buff *skb)
4743 {
4744         struct hci_ev_link_key_notify *ev = data;
4745         struct hci_conn *conn;
4746         struct link_key *key;
4747         bool persistent;
4748         u8 pin_len = 0;
4749
4750         bt_dev_dbg(hdev, "");
4751
4752         hci_dev_lock(hdev);
4753
4754         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4755         if (!conn)
4756                 goto unlock;
4757
4758         /* Ignore NULL link key against CVE-2020-26555 */
4759         if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4760                 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4761                            &ev->bdaddr);
4762                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4763                 hci_conn_drop(conn);
4764                 goto unlock;
4765         }
4766
4767         hci_conn_hold(conn);
4768         conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4769         hci_conn_drop(conn);
4770
4771         set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4772         conn_set_key(conn, ev->key_type, conn->pin_length);
4773
4774         if (!hci_dev_test_flag(hdev, HCI_MGMT))
4775                 goto unlock;
4776
4777         key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4778                                 ev->key_type, pin_len, &persistent);
4779         if (!key)
4780                 goto unlock;
4781
4782         /* Update connection information since adding the key will have
4783          * fixed up the type in the case of changed combination keys.
4784          */
4785         if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4786                 conn_set_key(conn, key->type, key->pin_len);
4787
4788         mgmt_new_link_key(hdev, key, persistent);
4789
4790         /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4791          * is set. If it's not set simply remove the key from the kernel
4792          * list (we've still notified user space about it but with
4793          * store_hint being 0).
4794          */
4795         if (key->type == HCI_LK_DEBUG_COMBINATION &&
4796             !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4797                 list_del_rcu(&key->list);
4798                 kfree_rcu(key, rcu);
4799                 goto unlock;
4800         }
4801
4802         if (persistent)
4803                 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4804         else
4805                 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4806
4807 unlock:
4808         hci_dev_unlock(hdev);
4809 }
4810
4811 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4812                                  struct sk_buff *skb)
4813 {
4814         struct hci_ev_clock_offset *ev = data;
4815         struct hci_conn *conn;
4816
4817         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4818
4819         hci_dev_lock(hdev);
4820
4821         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4822         if (conn && !ev->status) {
4823                 struct inquiry_entry *ie;
4824
4825                 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4826                 if (ie) {
4827                         ie->data.clock_offset = ev->clock_offset;
4828                         ie->timestamp = jiffies;
4829                 }
4830         }
4831
4832         hci_dev_unlock(hdev);
4833 }
4834
4835 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4836                                     struct sk_buff *skb)
4837 {
4838         struct hci_ev_pkt_type_change *ev = data;
4839         struct hci_conn *conn;
4840
4841         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4842
4843         hci_dev_lock(hdev);
4844
4845         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4846         if (conn && !ev->status)
4847                 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4848
4849         hci_dev_unlock(hdev);
4850 }
4851
4852 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4853                                    struct sk_buff *skb)
4854 {
4855         struct hci_ev_pscan_rep_mode *ev = data;
4856         struct inquiry_entry *ie;
4857
4858         bt_dev_dbg(hdev, "");
4859
4860         hci_dev_lock(hdev);
4861
4862         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4863         if (ie) {
4864                 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4865                 ie->timestamp = jiffies;
4866         }
4867
4868         hci_dev_unlock(hdev);
4869 }
4870
4871 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4872                                              struct sk_buff *skb)
4873 {
4874         struct hci_ev_inquiry_result_rssi *ev = edata;
4875         struct inquiry_data data;
4876         int i;
4877
4878         bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4879
4880         if (!ev->num)
4881                 return;
4882
4883         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4884                 return;
4885
4886         hci_dev_lock(hdev);
4887
4888         if (skb->len == array_size(ev->num,
4889                                    sizeof(struct inquiry_info_rssi_pscan))) {
4890                 struct inquiry_info_rssi_pscan *info;
4891
4892                 for (i = 0; i < ev->num; i++) {
4893                         u32 flags;
4894
4895                         info = hci_ev_skb_pull(hdev, skb,
4896                                                HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4897                                                sizeof(*info));
4898                         if (!info) {
4899                                 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4900                                            HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4901                                 goto unlock;
4902                         }
4903
4904                         bacpy(&data.bdaddr, &info->bdaddr);
4905                         data.pscan_rep_mode     = info->pscan_rep_mode;
4906                         data.pscan_period_mode  = info->pscan_period_mode;
4907                         data.pscan_mode         = info->pscan_mode;
4908                         memcpy(data.dev_class, info->dev_class, 3);
4909                         data.clock_offset       = info->clock_offset;
4910                         data.rssi               = info->rssi;
4911                         data.ssp_mode           = 0x00;
4912
4913                         flags = hci_inquiry_cache_update(hdev, &data, false);
4914
4915                         mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4916                                           info->dev_class, info->rssi,
4917                                           flags, NULL, 0, NULL, 0, 0);
4918                 }
4919         } else if (skb->len == array_size(ev->num,
4920                                           sizeof(struct inquiry_info_rssi))) {
4921                 struct inquiry_info_rssi *info;
4922
4923                 for (i = 0; i < ev->num; i++) {
4924                         u32 flags;
4925
4926                         info = hci_ev_skb_pull(hdev, skb,
4927                                                HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4928                                                sizeof(*info));
4929                         if (!info) {
4930                                 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4931                                            HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4932                                 goto unlock;
4933                         }
4934
4935                         bacpy(&data.bdaddr, &info->bdaddr);
4936                         data.pscan_rep_mode     = info->pscan_rep_mode;
4937                         data.pscan_period_mode  = info->pscan_period_mode;
4938                         data.pscan_mode         = 0x00;
4939                         memcpy(data.dev_class, info->dev_class, 3);
4940                         data.clock_offset       = info->clock_offset;
4941                         data.rssi               = info->rssi;
4942                         data.ssp_mode           = 0x00;
4943
4944                         flags = hci_inquiry_cache_update(hdev, &data, false);
4945
4946                         mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4947                                           info->dev_class, info->rssi,
4948                                           flags, NULL, 0, NULL, 0, 0);
4949                 }
4950         } else {
4951                 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4952                            HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4953         }
4954 unlock:
4955         hci_dev_unlock(hdev);
4956 }
4957
4958 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4959                                         struct sk_buff *skb)
4960 {
4961         struct hci_ev_remote_ext_features *ev = data;
4962         struct hci_conn *conn;
4963
4964         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4965
4966         hci_dev_lock(hdev);
4967
4968         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4969         if (!conn)
4970                 goto unlock;
4971
4972         if (ev->page < HCI_MAX_PAGES)
4973                 memcpy(conn->features[ev->page], ev->features, 8);
4974
4975         if (!ev->status && ev->page == 0x01) {
4976                 struct inquiry_entry *ie;
4977
4978                 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4979                 if (ie)
4980                         ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4981
4982                 if (ev->features[0] & LMP_HOST_SSP) {
4983                         set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4984                 } else {
4985                         /* It is mandatory by the Bluetooth specification that
4986                          * Extended Inquiry Results are only used when Secure
4987                          * Simple Pairing is enabled, but some devices violate
4988                          * this.
4989                          *
4990                          * To make these devices work, the internal SSP
4991                          * enabled flag needs to be cleared if the remote host
4992                          * features do not indicate SSP support */
4993                         clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4994                 }
4995
4996                 if (ev->features[0] & LMP_HOST_SC)
4997                         set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4998         }
4999
5000         if (conn->state != BT_CONFIG)
5001                 goto unlock;
5002
5003         if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
5004                 struct hci_cp_remote_name_req cp;
5005                 memset(&cp, 0, sizeof(cp));
5006                 bacpy(&cp.bdaddr, &conn->dst);
5007                 cp.pscan_rep_mode = 0x02;
5008                 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
5009         } else if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
5010                 mgmt_device_connected(hdev, conn, NULL, 0);
5011
5012         if (!hci_outgoing_auth_needed(hdev, conn)) {
5013                 conn->state = BT_CONNECTED;
5014                 hci_connect_cfm(conn, ev->status);
5015                 hci_conn_drop(conn);
5016         }
5017
5018 unlock:
5019         hci_dev_unlock(hdev);
5020 }
5021
5022 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
5023                                        struct sk_buff *skb)
5024 {
5025         struct hci_ev_sync_conn_complete *ev = data;
5026         struct hci_conn *conn;
5027         u8 status = ev->status;
5028
5029         switch (ev->link_type) {
5030         case SCO_LINK:
5031         case ESCO_LINK:
5032                 break;
5033         default:
5034                 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
5035                  * for HCI_Synchronous_Connection_Complete is limited to
5036                  * either SCO or eSCO
5037                  */
5038                 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
5039                 return;
5040         }
5041
5042         bt_dev_dbg(hdev, "status 0x%2.2x", status);
5043
5044         hci_dev_lock(hdev);
5045
5046         conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
5047         if (!conn) {
5048                 if (ev->link_type == ESCO_LINK)
5049                         goto unlock;
5050
5051                 /* When the link type in the event indicates SCO connection
5052                  * and lookup of the connection object fails, then check
5053                  * if an eSCO connection object exists.
5054                  *
5055                  * The core limits the synchronous connections to either
5056                  * SCO or eSCO. The eSCO connection is preferred and tried
5057                  * to be setup first and until successfully established,
5058                  * the link type will be hinted as eSCO.
5059                  */
5060                 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
5061                 if (!conn)
5062                         goto unlock;
5063         }
5064
5065         /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
5066          * Processing it more than once per connection can corrupt kernel memory.
5067          *
5068          * As the connection handle is set here for the first time, it indicates
5069          * whether the connection is already set up.
5070          */
5071         if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5072                 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
5073                 goto unlock;
5074         }
5075
5076         switch (status) {
5077         case 0x00:
5078                 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
5079                 if (status) {
5080                         conn->state = BT_CLOSED;
5081                         break;
5082                 }
5083
5084                 conn->state  = BT_CONNECTED;
5085                 conn->type   = ev->link_type;
5086
5087                 hci_debugfs_create_conn(conn);
5088                 hci_conn_add_sysfs(conn);
5089                 break;
5090
5091         case 0x10:      /* Connection Accept Timeout */
5092         case 0x0d:      /* Connection Rejected due to Limited Resources */
5093         case 0x11:      /* Unsupported Feature or Parameter Value */
5094         case 0x1c:      /* SCO interval rejected */
5095         case 0x1a:      /* Unsupported Remote Feature */
5096         case 0x1e:      /* Invalid LMP Parameters */
5097         case 0x1f:      /* Unspecified error */
5098         case 0x20:      /* Unsupported LMP Parameter value */
5099                 if (conn->out) {
5100                         conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
5101                                         (hdev->esco_type & EDR_ESCO_MASK);
5102                         if (hci_setup_sync(conn, conn->parent->handle))
5103                                 goto unlock;
5104                 }
5105                 fallthrough;
5106
5107         default:
5108                 conn->state = BT_CLOSED;
5109                 break;
5110         }
5111
5112         bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5113         /* Notify only in case of SCO over HCI transport data path which
5114          * is zero and non-zero value shall be non-HCI transport data path
5115          */
5116         if (conn->codec.data_path == 0 && hdev->notify) {
5117                 switch (ev->air_mode) {
5118                 case 0x02:
5119                         hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5120                         break;
5121                 case 0x03:
5122                         hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5123                         break;
5124                 }
5125         }
5126
5127         hci_connect_cfm(conn, status);
5128         if (status)
5129                 hci_conn_del(conn);
5130
5131 unlock:
5132         hci_dev_unlock(hdev);
5133 }
5134
5135 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5136 {
5137         size_t parsed = 0;
5138
5139         while (parsed < eir_len) {
5140                 u8 field_len = eir[0];
5141
5142                 if (field_len == 0)
5143                         return parsed;
5144
5145                 parsed += field_len + 1;
5146                 eir += field_len + 1;
5147         }
5148
5149         return eir_len;
5150 }
5151
5152 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5153                                             struct sk_buff *skb)
5154 {
5155         struct hci_ev_ext_inquiry_result *ev = edata;
5156         struct inquiry_data data;
5157         size_t eir_len;
5158         int i;
5159
5160         if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5161                              flex_array_size(ev, info, ev->num)))
5162                 return;
5163
5164         bt_dev_dbg(hdev, "num %d", ev->num);
5165
5166         if (!ev->num)
5167                 return;
5168
5169         if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5170                 return;
5171
5172         hci_dev_lock(hdev);
5173
5174         for (i = 0; i < ev->num; i++) {
5175                 struct extended_inquiry_info *info = &ev->info[i];
5176                 u32 flags;
5177                 bool name_known;
5178
5179                 bacpy(&data.bdaddr, &info->bdaddr);
5180                 data.pscan_rep_mode     = info->pscan_rep_mode;
5181                 data.pscan_period_mode  = info->pscan_period_mode;
5182                 data.pscan_mode         = 0x00;
5183                 memcpy(data.dev_class, info->dev_class, 3);
5184                 data.clock_offset       = info->clock_offset;
5185                 data.rssi               = info->rssi;
5186                 data.ssp_mode           = 0x01;
5187
5188                 if (hci_dev_test_flag(hdev, HCI_MGMT))
5189                         name_known = eir_get_data(info->data,
5190                                                   sizeof(info->data),
5191                                                   EIR_NAME_COMPLETE, NULL);
5192                 else
5193                         name_known = true;
5194
5195                 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5196
5197                 eir_len = eir_get_length(info->data, sizeof(info->data));
5198
5199                 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5200                                   info->dev_class, info->rssi,
5201                                   flags, info->data, eir_len, NULL, 0, 0);
5202         }
5203
5204         hci_dev_unlock(hdev);
5205 }
5206
5207 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5208                                          struct sk_buff *skb)
5209 {
5210         struct hci_ev_key_refresh_complete *ev = data;
5211         struct hci_conn *conn;
5212
5213         bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5214                    __le16_to_cpu(ev->handle));
5215
5216         hci_dev_lock(hdev);
5217
5218         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5219         if (!conn)
5220                 goto unlock;
5221
5222         /* For BR/EDR the necessary steps are taken through the
5223          * auth_complete event.
5224          */
5225         if (conn->type != LE_LINK)
5226                 goto unlock;
5227
5228         if (!ev->status)
5229                 conn->sec_level = conn->pending_sec_level;
5230
5231         clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5232
5233         if (ev->status && conn->state == BT_CONNECTED) {
5234                 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5235                 hci_conn_drop(conn);
5236                 goto unlock;
5237         }
5238
5239         if (conn->state == BT_CONFIG) {
5240                 if (!ev->status)
5241                         conn->state = BT_CONNECTED;
5242
5243                 hci_connect_cfm(conn, ev->status);
5244                 hci_conn_drop(conn);
5245         } else {
5246                 hci_auth_cfm(conn, ev->status);
5247
5248                 hci_conn_hold(conn);
5249                 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5250                 hci_conn_drop(conn);
5251         }
5252
5253 unlock:
5254         hci_dev_unlock(hdev);
5255 }
5256
5257 static u8 hci_get_auth_req(struct hci_conn *conn)
5258 {
5259         /* If remote requests no-bonding follow that lead */
5260         if (conn->remote_auth == HCI_AT_NO_BONDING ||
5261             conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5262                 return conn->remote_auth | (conn->auth_type & 0x01);
5263
5264         /* If both remote and local have enough IO capabilities, require
5265          * MITM protection
5266          */
5267         if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5268             conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5269                 return conn->remote_auth | 0x01;
5270
5271         /* No MITM protection possible so ignore remote requirement */
5272         return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5273 }
5274
5275 static u8 bredr_oob_data_present(struct hci_conn *conn)
5276 {
5277         struct hci_dev *hdev = conn->hdev;
5278         struct oob_data *data;
5279
5280         data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5281         if (!data)
5282                 return 0x00;
5283
5284         if (bredr_sc_enabled(hdev)) {
5285                 /* When Secure Connections is enabled, then just
5286                  * return the present value stored with the OOB
5287                  * data. The stored value contains the right present
5288                  * information. However it can only be trusted when
5289                  * not in Secure Connection Only mode.
5290                  */
5291                 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5292                         return data->present;
5293
5294                 /* When Secure Connections Only mode is enabled, then
5295                  * the P-256 values are required. If they are not
5296                  * available, then do not declare that OOB data is
5297                  * present.
5298                  */
5299                 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5300                     !crypto_memneq(data->hash256, ZERO_KEY, 16))
5301                         return 0x00;
5302
5303                 return 0x02;
5304         }
5305
5306         /* When Secure Connections is not enabled or actually
5307          * not supported by the hardware, then check that if
5308          * P-192 data values are present.
5309          */
5310         if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5311             !crypto_memneq(data->hash192, ZERO_KEY, 16))
5312                 return 0x00;
5313
5314         return 0x01;
5315 }
5316
5317 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5318                                     struct sk_buff *skb)
5319 {
5320         struct hci_ev_io_capa_request *ev = data;
5321         struct hci_conn *conn;
5322
5323         bt_dev_dbg(hdev, "");
5324
5325         hci_dev_lock(hdev);
5326
5327         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5328         if (!conn || !hci_conn_ssp_enabled(conn))
5329                 goto unlock;
5330
5331         hci_conn_hold(conn);
5332
5333         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5334                 goto unlock;
5335
5336         /* Allow pairing if we're pairable, the initiators of the
5337          * pairing or if the remote is not requesting bonding.
5338          */
5339         if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5340             test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5341             (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5342                 struct hci_cp_io_capability_reply cp;
5343
5344                 bacpy(&cp.bdaddr, &ev->bdaddr);
5345                 /* Change the IO capability from KeyboardDisplay
5346                  * to DisplayYesNo as it is not supported by BT spec. */
5347                 cp.capability = (conn->io_capability == 0x04) ?
5348                                 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5349
5350                 /* If we are initiators, there is no remote information yet */
5351                 if (conn->remote_auth == 0xff) {
5352                         /* Request MITM protection if our IO caps allow it
5353                          * except for the no-bonding case.
5354                          */
5355                         if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5356                             conn->auth_type != HCI_AT_NO_BONDING)
5357                                 conn->auth_type |= 0x01;
5358                 } else {
5359                         conn->auth_type = hci_get_auth_req(conn);
5360                 }
5361
5362                 /* If we're not bondable, force one of the non-bondable
5363                  * authentication requirement values.
5364                  */
5365                 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5366                         conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5367
5368                 cp.authentication = conn->auth_type;
5369                 cp.oob_data = bredr_oob_data_present(conn);
5370
5371                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5372                              sizeof(cp), &cp);
5373         } else {
5374                 struct hci_cp_io_capability_neg_reply cp;
5375
5376                 bacpy(&cp.bdaddr, &ev->bdaddr);
5377                 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5378
5379                 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5380                              sizeof(cp), &cp);
5381         }
5382
5383 unlock:
5384         hci_dev_unlock(hdev);
5385 }
5386
5387 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5388                                   struct sk_buff *skb)
5389 {
5390         struct hci_ev_io_capa_reply *ev = data;
5391         struct hci_conn *conn;
5392
5393         bt_dev_dbg(hdev, "");
5394
5395         hci_dev_lock(hdev);
5396
5397         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5398         if (!conn)
5399                 goto unlock;
5400
5401         conn->remote_cap = ev->capability;
5402         conn->remote_auth = ev->authentication;
5403
5404 unlock:
5405         hci_dev_unlock(hdev);
5406 }
5407
5408 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5409                                          struct sk_buff *skb)
5410 {
5411         struct hci_ev_user_confirm_req *ev = data;
5412         int loc_mitm, rem_mitm, confirm_hint = 0;
5413         struct hci_conn *conn;
5414
5415         bt_dev_dbg(hdev, "");
5416
5417         hci_dev_lock(hdev);
5418
5419         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5420                 goto unlock;
5421
5422         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5423         if (!conn)
5424                 goto unlock;
5425
5426         loc_mitm = (conn->auth_type & 0x01);
5427         rem_mitm = (conn->remote_auth & 0x01);
5428
5429         /* If we require MITM but the remote device can't provide that
5430          * (it has NoInputNoOutput) then reject the confirmation
5431          * request. We check the security level here since it doesn't
5432          * necessarily match conn->auth_type.
5433          */
5434         if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5435             conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5436                 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5437                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5438                              sizeof(ev->bdaddr), &ev->bdaddr);
5439                 goto unlock;
5440         }
5441
5442         /* If no side requires MITM protection; auto-accept */
5443         if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5444             (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5445
5446                 /* If we're not the initiators request authorization to
5447                  * proceed from user space (mgmt_user_confirm with
5448                  * confirm_hint set to 1). The exception is if neither
5449                  * side had MITM or if the local IO capability is
5450                  * NoInputNoOutput, in which case we do auto-accept
5451                  */
5452                 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5453                     conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5454                     (loc_mitm || rem_mitm)) {
5455                         bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5456                         confirm_hint = 1;
5457                         goto confirm;
5458                 }
5459
5460                 /* If there already exists link key in local host, leave the
5461                  * decision to user space since the remote device could be
5462                  * legitimate or malicious.
5463                  */
5464                 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5465                         bt_dev_dbg(hdev, "Local host already has link key");
5466                         confirm_hint = 1;
5467                         goto confirm;
5468                 }
5469
5470                 BT_DBG("Auto-accept of user confirmation with %ums delay",
5471                        hdev->auto_accept_delay);
5472
5473                 if (hdev->auto_accept_delay > 0) {
5474                         int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5475                         queue_delayed_work(conn->hdev->workqueue,
5476                                            &conn->auto_accept_work, delay);
5477                         goto unlock;
5478                 }
5479
5480                 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5481                              sizeof(ev->bdaddr), &ev->bdaddr);
5482                 goto unlock;
5483         }
5484
5485 confirm:
5486         mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5487                                   le32_to_cpu(ev->passkey), confirm_hint);
5488
5489 unlock:
5490         hci_dev_unlock(hdev);
5491 }
5492
5493 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5494                                          struct sk_buff *skb)
5495 {
5496         struct hci_ev_user_passkey_req *ev = data;
5497
5498         bt_dev_dbg(hdev, "");
5499
5500         if (hci_dev_test_flag(hdev, HCI_MGMT))
5501                 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5502 }
5503
5504 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5505                                         struct sk_buff *skb)
5506 {
5507         struct hci_ev_user_passkey_notify *ev = data;
5508         struct hci_conn *conn;
5509
5510         bt_dev_dbg(hdev, "");
5511
5512         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5513         if (!conn)
5514                 return;
5515
5516         conn->passkey_notify = __le32_to_cpu(ev->passkey);
5517         conn->passkey_entered = 0;
5518
5519         if (hci_dev_test_flag(hdev, HCI_MGMT))
5520                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5521                                          conn->dst_type, conn->passkey_notify,
5522                                          conn->passkey_entered);
5523 }
5524
5525 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5526                                     struct sk_buff *skb)
5527 {
5528         struct hci_ev_keypress_notify *ev = data;
5529         struct hci_conn *conn;
5530
5531         bt_dev_dbg(hdev, "");
5532
5533         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5534         if (!conn)
5535                 return;
5536
5537         switch (ev->type) {
5538         case HCI_KEYPRESS_STARTED:
5539                 conn->passkey_entered = 0;
5540                 return;
5541
5542         case HCI_KEYPRESS_ENTERED:
5543                 conn->passkey_entered++;
5544                 break;
5545
5546         case HCI_KEYPRESS_ERASED:
5547                 conn->passkey_entered--;
5548                 break;
5549
5550         case HCI_KEYPRESS_CLEARED:
5551                 conn->passkey_entered = 0;
5552                 break;
5553
5554         case HCI_KEYPRESS_COMPLETED:
5555                 return;
5556         }
5557
5558         if (hci_dev_test_flag(hdev, HCI_MGMT))
5559                 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5560                                          conn->dst_type, conn->passkey_notify,
5561                                          conn->passkey_entered);
5562 }
5563
5564 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5565                                          struct sk_buff *skb)
5566 {
5567         struct hci_ev_simple_pair_complete *ev = data;
5568         struct hci_conn *conn;
5569
5570         bt_dev_dbg(hdev, "");
5571
5572         hci_dev_lock(hdev);
5573
5574         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5575         if (!conn || !hci_conn_ssp_enabled(conn))
5576                 goto unlock;
5577
5578         /* Reset the authentication requirement to unknown */
5579         conn->remote_auth = 0xff;
5580
5581         /* To avoid duplicate auth_failed events to user space we check
5582          * the HCI_CONN_AUTH_PEND flag which will be set if we
5583          * initiated the authentication. A traditional auth_complete
5584          * event gets always produced as initiator and is also mapped to
5585          * the mgmt_auth_failed event */
5586         if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5587                 mgmt_auth_failed(conn, ev->status);
5588
5589         hci_conn_drop(conn);
5590
5591 unlock:
5592         hci_dev_unlock(hdev);
5593 }
5594
5595 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5596                                          struct sk_buff *skb)
5597 {
5598         struct hci_ev_remote_host_features *ev = data;
5599         struct inquiry_entry *ie;
5600         struct hci_conn *conn;
5601
5602         bt_dev_dbg(hdev, "");
5603
5604         hci_dev_lock(hdev);
5605
5606         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5607         if (conn)
5608                 memcpy(conn->features[1], ev->features, 8);
5609
5610         ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5611         if (ie)
5612                 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5613
5614         hci_dev_unlock(hdev);
5615 }
5616
5617 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5618                                             struct sk_buff *skb)
5619 {
5620         struct hci_ev_remote_oob_data_request *ev = edata;
5621         struct oob_data *data;
5622
5623         bt_dev_dbg(hdev, "");
5624
5625         hci_dev_lock(hdev);
5626
5627         if (!hci_dev_test_flag(hdev, HCI_MGMT))
5628                 goto unlock;
5629
5630         data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5631         if (!data) {
5632                 struct hci_cp_remote_oob_data_neg_reply cp;
5633
5634                 bacpy(&cp.bdaddr, &ev->bdaddr);
5635                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5636                              sizeof(cp), &cp);
5637                 goto unlock;
5638         }
5639
5640         if (bredr_sc_enabled(hdev)) {
5641                 struct hci_cp_remote_oob_ext_data_reply cp;
5642
5643                 bacpy(&cp.bdaddr, &ev->bdaddr);
5644                 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5645                         memset(cp.hash192, 0, sizeof(cp.hash192));
5646                         memset(cp.rand192, 0, sizeof(cp.rand192));
5647                 } else {
5648                         memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5649                         memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5650                 }
5651                 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5652                 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5653
5654                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5655                              sizeof(cp), &cp);
5656         } else {
5657                 struct hci_cp_remote_oob_data_reply cp;
5658
5659                 bacpy(&cp.bdaddr, &ev->bdaddr);
5660                 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5661                 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5662
5663                 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5664                              sizeof(cp), &cp);
5665         }
5666
5667 unlock:
5668         hci_dev_unlock(hdev);
5669 }
5670
5671 #if IS_ENABLED(CONFIG_BT_HS)
5672 static void hci_chan_selected_evt(struct hci_dev *hdev, void *data,
5673                                   struct sk_buff *skb)
5674 {
5675         struct hci_ev_channel_selected *ev = data;
5676         struct hci_conn *hcon;
5677
5678         bt_dev_dbg(hdev, "handle 0x%2.2x", ev->phy_handle);
5679
5680         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5681         if (!hcon)
5682                 return;
5683
5684         amp_read_loc_assoc_final_data(hdev, hcon);
5685 }
5686
5687 static void hci_phy_link_complete_evt(struct hci_dev *hdev, void *data,
5688                                       struct sk_buff *skb)
5689 {
5690         struct hci_ev_phy_link_complete *ev = data;
5691         struct hci_conn *hcon, *bredr_hcon;
5692
5693         bt_dev_dbg(hdev, "handle 0x%2.2x status 0x%2.2x", ev->phy_handle,
5694                    ev->status);
5695
5696         hci_dev_lock(hdev);
5697
5698         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5699         if (!hcon)
5700                 goto unlock;
5701
5702         if (!hcon->amp_mgr)
5703                 goto unlock;
5704
5705         if (ev->status) {
5706                 hci_conn_del(hcon);
5707                 goto unlock;
5708         }
5709
5710         bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
5711
5712         hcon->state = BT_CONNECTED;
5713         bacpy(&hcon->dst, &bredr_hcon->dst);
5714
5715         hci_conn_hold(hcon);
5716         hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
5717         hci_conn_drop(hcon);
5718
5719         hci_debugfs_create_conn(hcon);
5720         hci_conn_add_sysfs(hcon);
5721
5722         amp_physical_cfm(bredr_hcon, hcon);
5723
5724 unlock:
5725         hci_dev_unlock(hdev);
5726 }
5727
5728 static void hci_loglink_complete_evt(struct hci_dev *hdev, void *data,
5729                                      struct sk_buff *skb)
5730 {
5731         struct hci_ev_logical_link_complete *ev = data;
5732         struct hci_conn *hcon;
5733         struct hci_chan *hchan;
5734         struct amp_mgr *mgr;
5735
5736         bt_dev_dbg(hdev, "log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
5737                    le16_to_cpu(ev->handle), ev->phy_handle, ev->status);
5738
5739         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5740         if (!hcon)
5741                 return;
5742
5743         /* Create AMP hchan */
5744         hchan = hci_chan_create(hcon);
5745         if (!hchan)
5746                 return;
5747
5748         hchan->handle = le16_to_cpu(ev->handle);
5749         hchan->amp = true;
5750
5751         BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
5752
5753         mgr = hcon->amp_mgr;
5754         if (mgr && mgr->bredr_chan) {
5755                 struct l2cap_chan *bredr_chan = mgr->bredr_chan;
5756
5757                 l2cap_chan_lock(bredr_chan);
5758
5759                 bredr_chan->conn->mtu = hdev->block_mtu;
5760                 l2cap_logical_cfm(bredr_chan, hchan, 0);
5761                 hci_conn_hold(hcon);
5762
5763                 l2cap_chan_unlock(bredr_chan);
5764         }
5765 }
5766
5767 static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev, void *data,
5768                                              struct sk_buff *skb)
5769 {
5770         struct hci_ev_disconn_logical_link_complete *ev = data;
5771         struct hci_chan *hchan;
5772
5773         bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x",
5774                    le16_to_cpu(ev->handle), ev->status);
5775
5776         if (ev->status)
5777                 return;
5778
5779         hci_dev_lock(hdev);
5780
5781         hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
5782         if (!hchan || !hchan->amp)
5783                 goto unlock;
5784
5785         amp_destroy_logical_link(hchan, ev->reason);
5786
5787 unlock:
5788         hci_dev_unlock(hdev);
5789 }
5790
5791 static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev, void *data,
5792                                              struct sk_buff *skb)
5793 {
5794         struct hci_ev_disconn_phy_link_complete *ev = data;
5795         struct hci_conn *hcon;
5796
5797         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5798
5799         if (ev->status)
5800                 return;
5801
5802         hci_dev_lock(hdev);
5803
5804         hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
5805         if (hcon && hcon->type == AMP_LINK) {
5806                 hcon->state = BT_CLOSED;
5807                 hci_disconn_cfm(hcon, ev->reason);
5808                 hci_conn_del(hcon);
5809         }
5810
5811         hci_dev_unlock(hdev);
5812 }
5813 #endif
5814
5815 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5816                                 u8 bdaddr_type, bdaddr_t *local_rpa)
5817 {
5818         if (conn->out) {
5819                 conn->dst_type = bdaddr_type;
5820                 conn->resp_addr_type = bdaddr_type;
5821                 bacpy(&conn->resp_addr, bdaddr);
5822
5823                 /* Check if the controller has set a Local RPA then it must be
5824                  * used instead or hdev->rpa.
5825                  */
5826                 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5827                         conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5828                         bacpy(&conn->init_addr, local_rpa);
5829                 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5830                         conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5831                         bacpy(&conn->init_addr, &conn->hdev->rpa);
5832                 } else {
5833                         hci_copy_identity_address(conn->hdev, &conn->init_addr,
5834                                                   &conn->init_addr_type);
5835                 }
5836         } else {
5837                 conn->resp_addr_type = conn->hdev->adv_addr_type;
5838                 /* Check if the controller has set a Local RPA then it must be
5839                  * used instead or hdev->rpa.
5840                  */
5841                 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5842                         conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5843                         bacpy(&conn->resp_addr, local_rpa);
5844                 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5845                         /* In case of ext adv, resp_addr will be updated in
5846                          * Adv Terminated event.
5847                          */
5848                         if (!ext_adv_capable(conn->hdev))
5849                                 bacpy(&conn->resp_addr,
5850                                       &conn->hdev->random_addr);
5851                 } else {
5852                         bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5853                 }
5854
5855                 conn->init_addr_type = bdaddr_type;
5856                 bacpy(&conn->init_addr, bdaddr);
5857
5858                 /* For incoming connections, set the default minimum
5859                  * and maximum connection interval. They will be used
5860                  * to check if the parameters are in range and if not
5861                  * trigger the connection update procedure.
5862                  */
5863                 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5864                 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5865         }
5866 }
5867
5868 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5869                                  bdaddr_t *bdaddr, u8 bdaddr_type,
5870                                  bdaddr_t *local_rpa, u8 role, u16 handle,
5871                                  u16 interval, u16 latency,
5872                                  u16 supervision_timeout)
5873 {
5874         struct hci_conn_params *params;
5875         struct hci_conn *conn;
5876         struct smp_irk *irk;
5877         u8 addr_type;
5878
5879         hci_dev_lock(hdev);
5880
5881         /* All controllers implicitly stop advertising in the event of a
5882          * connection, so ensure that the state bit is cleared.
5883          */
5884         hci_dev_clear_flag(hdev, HCI_LE_ADV);
5885
5886         conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5887         if (!conn) {
5888                 /* In case of error status and there is no connection pending
5889                  * just unlock as there is nothing to cleanup.
5890                  */
5891                 if (status)
5892                         goto unlock;
5893
5894                 conn = hci_conn_add(hdev, LE_LINK, bdaddr, role);
5895                 if (!conn) {
5896                         bt_dev_err(hdev, "no memory for new connection");
5897                         goto unlock;
5898                 }
5899
5900                 conn->dst_type = bdaddr_type;
5901
5902                 /* If we didn't have a hci_conn object previously
5903                  * but we're in central role this must be something
5904                  * initiated using an accept list. Since accept list based
5905                  * connections are not "first class citizens" we don't
5906                  * have full tracking of them. Therefore, we go ahead
5907                  * with a "best effort" approach of determining the
5908                  * initiator address based on the HCI_PRIVACY flag.
5909                  */
5910                 if (conn->out) {
5911                         conn->resp_addr_type = bdaddr_type;
5912                         bacpy(&conn->resp_addr, bdaddr);
5913                         if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5914                                 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5915                                 bacpy(&conn->init_addr, &hdev->rpa);
5916                         } else {
5917                                 hci_copy_identity_address(hdev,
5918                                                           &conn->init_addr,
5919                                                           &conn->init_addr_type);
5920                         }
5921                 }
5922         } else {
5923                 cancel_delayed_work(&conn->le_conn_timeout);
5924         }
5925
5926         /* The HCI_LE_Connection_Complete event is only sent once per connection.
5927          * Processing it more than once per connection can corrupt kernel memory.
5928          *
5929          * As the connection handle is set here for the first time, it indicates
5930          * whether the connection is already set up.
5931          */
5932         if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5933                 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5934                 goto unlock;
5935         }
5936
5937         le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5938
5939         /* Lookup the identity address from the stored connection
5940          * address and address type.
5941          *
5942          * When establishing connections to an identity address, the
5943          * connection procedure will store the resolvable random
5944          * address first. Now if it can be converted back into the
5945          * identity address, start using the identity address from
5946          * now on.
5947          */
5948         irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5949         if (irk) {
5950                 bacpy(&conn->dst, &irk->bdaddr);
5951                 conn->dst_type = irk->addr_type;
5952         }
5953
5954         conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5955
5956         if (handle > HCI_CONN_HANDLE_MAX) {
5957                 bt_dev_err(hdev, "Invalid handle: 0x%4.4x > 0x%4.4x", handle,
5958                            HCI_CONN_HANDLE_MAX);
5959                 status = HCI_ERROR_INVALID_PARAMETERS;
5960         }
5961
5962         /* All connection failure handling is taken care of by the
5963          * hci_conn_failed function which is triggered by the HCI
5964          * request completion callbacks used for connecting.
5965          */
5966         if (status)
5967                 goto unlock;
5968
5969         /* Drop the connection if it has been aborted */
5970         if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5971                 hci_conn_drop(conn);
5972                 goto unlock;
5973         }
5974
5975         if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5976                 addr_type = BDADDR_LE_PUBLIC;
5977         else
5978                 addr_type = BDADDR_LE_RANDOM;
5979
5980         /* Drop the connection if the device is blocked */
5981         if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5982                 hci_conn_drop(conn);
5983                 goto unlock;
5984         }
5985
5986         if (!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
5987                 mgmt_device_connected(hdev, conn, NULL, 0);
5988
5989         conn->sec_level = BT_SECURITY_LOW;
5990         conn->handle = handle;
5991         conn->state = BT_CONFIG;
5992
5993         /* Store current advertising instance as connection advertising instance
5994          * when sotfware rotation is in use so it can be re-enabled when
5995          * disconnected.
5996          */
5997         if (!ext_adv_capable(hdev))
5998                 conn->adv_instance = hdev->cur_adv_instance;
5999
6000         conn->le_conn_interval = interval;
6001         conn->le_conn_latency = latency;
6002         conn->le_supv_timeout = supervision_timeout;
6003
6004         hci_debugfs_create_conn(conn);
6005         hci_conn_add_sysfs(conn);
6006
6007         /* The remote features procedure is defined for central
6008          * role only. So only in case of an initiated connection
6009          * request the remote features.
6010          *
6011          * If the local controller supports peripheral-initiated features
6012          * exchange, then requesting the remote features in peripheral
6013          * role is possible. Otherwise just transition into the
6014          * connected state without requesting the remote features.
6015          */
6016         if (conn->out ||
6017             (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
6018                 struct hci_cp_le_read_remote_features cp;
6019
6020                 cp.handle = __cpu_to_le16(conn->handle);
6021
6022                 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
6023                              sizeof(cp), &cp);
6024
6025                 hci_conn_hold(conn);
6026         } else {
6027                 conn->state = BT_CONNECTED;
6028                 hci_connect_cfm(conn, status);
6029         }
6030
6031         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
6032                                            conn->dst_type);
6033         if (params) {
6034                 hci_pend_le_list_del_init(params);
6035                 if (params->conn) {
6036                         hci_conn_drop(params->conn);
6037                         hci_conn_put(params->conn);
6038                         params->conn = NULL;
6039                 }
6040         }
6041
6042 unlock:
6043         hci_update_passive_scan(hdev);
6044         hci_dev_unlock(hdev);
6045 }
6046
6047 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
6048                                      struct sk_buff *skb)
6049 {
6050         struct hci_ev_le_conn_complete *ev = data;
6051
6052         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6053
6054         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
6055                              NULL, ev->role, le16_to_cpu(ev->handle),
6056                              le16_to_cpu(ev->interval),
6057                              le16_to_cpu(ev->latency),
6058                              le16_to_cpu(ev->supervision_timeout));
6059 }
6060
6061 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
6062                                          struct sk_buff *skb)
6063 {
6064         struct hci_ev_le_enh_conn_complete *ev = data;
6065
6066         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6067
6068         le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
6069                              &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
6070                              le16_to_cpu(ev->interval),
6071                              le16_to_cpu(ev->latency),
6072                              le16_to_cpu(ev->supervision_timeout));
6073 }
6074
6075 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
6076                                     struct sk_buff *skb)
6077 {
6078         struct hci_evt_le_ext_adv_set_term *ev = data;
6079         struct hci_conn *conn;
6080         struct adv_info *adv, *n;
6081
6082         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6083
6084         /* The Bluetooth Core 5.3 specification clearly states that this event
6085          * shall not be sent when the Host disables the advertising set. So in
6086          * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
6087          *
6088          * When the Host disables an advertising set, all cleanup is done via
6089          * its command callback and not needed to be duplicated here.
6090          */
6091         if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
6092                 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
6093                 return;
6094         }
6095
6096         hci_dev_lock(hdev);
6097
6098         adv = hci_find_adv_instance(hdev, ev->handle);
6099
6100         if (ev->status) {
6101                 if (!adv)
6102                         goto unlock;
6103
6104                 /* Remove advertising as it has been terminated */
6105                 hci_remove_adv_instance(hdev, ev->handle);
6106                 mgmt_advertising_removed(NULL, hdev, ev->handle);
6107
6108                 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
6109                         if (adv->enabled)
6110                                 goto unlock;
6111                 }
6112
6113                 /* We are no longer advertising, clear HCI_LE_ADV */
6114                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6115                 goto unlock;
6116         }
6117
6118         if (adv)
6119                 adv->enabled = false;
6120
6121         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
6122         if (conn) {
6123                 /* Store handle in the connection so the correct advertising
6124                  * instance can be re-enabled when disconnected.
6125                  */
6126                 conn->adv_instance = ev->handle;
6127
6128                 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
6129                     bacmp(&conn->resp_addr, BDADDR_ANY))
6130                         goto unlock;
6131
6132                 if (!ev->handle) {
6133                         bacpy(&conn->resp_addr, &hdev->random_addr);
6134                         goto unlock;
6135                 }
6136
6137                 if (adv)
6138                         bacpy(&conn->resp_addr, &adv->random_addr);
6139         }
6140
6141 unlock:
6142         hci_dev_unlock(hdev);
6143 }
6144
6145 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
6146                                             struct sk_buff *skb)
6147 {
6148         struct hci_ev_le_conn_update_complete *ev = data;
6149         struct hci_conn *conn;
6150
6151         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6152
6153         if (ev->status)
6154                 return;
6155
6156         hci_dev_lock(hdev);
6157
6158         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6159         if (conn) {
6160                 conn->le_conn_interval = le16_to_cpu(ev->interval);
6161                 conn->le_conn_latency = le16_to_cpu(ev->latency);
6162                 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
6163         }
6164
6165         hci_dev_unlock(hdev);
6166 }
6167
6168 /* This function requires the caller holds hdev->lock */
6169 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
6170                                               bdaddr_t *addr,
6171                                               u8 addr_type, bool addr_resolved,
6172                                               u8 adv_type)
6173 {
6174         struct hci_conn *conn;
6175         struct hci_conn_params *params;
6176
6177         /* If the event is not connectable don't proceed further */
6178         if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
6179                 return NULL;
6180
6181         /* Ignore if the device is blocked or hdev is suspended */
6182         if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
6183             hdev->suspended)
6184                 return NULL;
6185
6186         /* Most controller will fail if we try to create new connections
6187          * while we have an existing one in peripheral role.
6188          */
6189         if (hdev->conn_hash.le_num_peripheral > 0 &&
6190             (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
6191              !(hdev->le_states[3] & 0x10)))
6192                 return NULL;
6193
6194         /* If we're not connectable only connect devices that we have in
6195          * our pend_le_conns list.
6196          */
6197         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
6198                                            addr_type);
6199         if (!params)
6200                 return NULL;
6201
6202         if (!params->explicit_connect) {
6203                 switch (params->auto_connect) {
6204                 case HCI_AUTO_CONN_DIRECT:
6205                         /* Only devices advertising with ADV_DIRECT_IND are
6206                          * triggering a connection attempt. This is allowing
6207                          * incoming connections from peripheral devices.
6208                          */
6209                         if (adv_type != LE_ADV_DIRECT_IND)
6210                                 return NULL;
6211                         break;
6212                 case HCI_AUTO_CONN_ALWAYS:
6213                         /* Devices advertising with ADV_IND or ADV_DIRECT_IND
6214                          * are triggering a connection attempt. This means
6215                          * that incoming connections from peripheral device are
6216                          * accepted and also outgoing connections to peripheral
6217                          * devices are established when found.
6218                          */
6219                         break;
6220                 default:
6221                         return NULL;
6222                 }
6223         }
6224
6225         conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
6226                               BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
6227                               HCI_ROLE_MASTER);
6228         if (!IS_ERR(conn)) {
6229                 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
6230                  * by higher layer that tried to connect, if no then
6231                  * store the pointer since we don't really have any
6232                  * other owner of the object besides the params that
6233                  * triggered it. This way we can abort the connection if
6234                  * the parameters get removed and keep the reference
6235                  * count consistent once the connection is established.
6236                  */
6237
6238                 if (!params->explicit_connect)
6239                         params->conn = hci_conn_get(conn);
6240
6241                 return conn;
6242         }
6243
6244         switch (PTR_ERR(conn)) {
6245         case -EBUSY:
6246                 /* If hci_connect() returns -EBUSY it means there is already
6247                  * an LE connection attempt going on. Since controllers don't
6248                  * support more than one connection attempt at the time, we
6249                  * don't consider this an error case.
6250                  */
6251                 break;
6252         default:
6253                 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
6254                 return NULL;
6255         }
6256
6257         return NULL;
6258 }
6259
6260 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6261                                u8 bdaddr_type, bdaddr_t *direct_addr,
6262                                u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
6263                                bool ext_adv, bool ctl_time, u64 instant)
6264 {
6265         struct discovery_state *d = &hdev->discovery;
6266         struct smp_irk *irk;
6267         struct hci_conn *conn;
6268         bool match, bdaddr_resolved;
6269         u32 flags;
6270         u8 *ptr;
6271
6272         switch (type) {
6273         case LE_ADV_IND:
6274         case LE_ADV_DIRECT_IND:
6275         case LE_ADV_SCAN_IND:
6276         case LE_ADV_NONCONN_IND:
6277         case LE_ADV_SCAN_RSP:
6278                 break;
6279         default:
6280                 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6281                                        "type: 0x%02x", type);
6282                 return;
6283         }
6284
6285         if (len > max_adv_len(hdev)) {
6286                 bt_dev_err_ratelimited(hdev,
6287                                        "adv larger than maximum supported");
6288                 return;
6289         }
6290
6291         /* Find the end of the data in case the report contains padded zero
6292          * bytes at the end causing an invalid length value.
6293          *
6294          * When data is NULL, len is 0 so there is no need for extra ptr
6295          * check as 'ptr < data + 0' is already false in such case.
6296          */
6297         for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6298                 if (ptr + 1 + *ptr > data + len)
6299                         break;
6300         }
6301
6302         /* Adjust for actual length. This handles the case when remote
6303          * device is advertising with incorrect data length.
6304          */
6305         len = ptr - data;
6306
6307         /* If the direct address is present, then this report is from
6308          * a LE Direct Advertising Report event. In that case it is
6309          * important to see if the address is matching the local
6310          * controller address.
6311          */
6312         if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6313                 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6314                                                   &bdaddr_resolved);
6315
6316                 /* Only resolvable random addresses are valid for these
6317                  * kind of reports and others can be ignored.
6318                  */
6319                 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6320                         return;
6321
6322                 /* If the controller is not using resolvable random
6323                  * addresses, then this report can be ignored.
6324                  */
6325                 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6326                         return;
6327
6328                 /* If the local IRK of the controller does not match
6329                  * with the resolvable random address provided, then
6330                  * this report can be ignored.
6331                  */
6332                 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6333                         return;
6334         }
6335
6336         /* Check if we need to convert to identity address */
6337         irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6338         if (irk) {
6339                 bdaddr = &irk->bdaddr;
6340                 bdaddr_type = irk->addr_type;
6341         }
6342
6343         bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6344
6345         /* Check if we have been requested to connect to this device.
6346          *
6347          * direct_addr is set only for directed advertising reports (it is NULL
6348          * for advertising reports) and is already verified to be RPA above.
6349          */
6350         conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6351                                      type);
6352         if (!ext_adv && conn && type == LE_ADV_IND &&
6353             len <= max_adv_len(hdev)) {
6354                 /* Store report for later inclusion by
6355                  * mgmt_device_connected
6356                  */
6357                 memcpy(conn->le_adv_data, data, len);
6358                 conn->le_adv_data_len = len;
6359         }
6360
6361         if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6362                 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6363         else
6364                 flags = 0;
6365
6366         /* All scan results should be sent up for Mesh systems */
6367         if (hci_dev_test_flag(hdev, HCI_MESH)) {
6368                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6369                                   rssi, flags, data, len, NULL, 0, instant);
6370                 return;
6371         }
6372
6373         /* Passive scanning shouldn't trigger any device found events,
6374          * except for devices marked as CONN_REPORT for which we do send
6375          * device found events, or advertisement monitoring requested.
6376          */
6377         if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6378                 if (type == LE_ADV_DIRECT_IND)
6379                         return;
6380
6381                 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6382                                                bdaddr, bdaddr_type) &&
6383                     idr_is_empty(&hdev->adv_monitors_idr))
6384                         return;
6385
6386                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6387                                   rssi, flags, data, len, NULL, 0, 0);
6388                 return;
6389         }
6390
6391         /* When receiving a scan response, then there is no way to
6392          * know if the remote device is connectable or not. However
6393          * since scan responses are merged with a previously seen
6394          * advertising report, the flags field from that report
6395          * will be used.
6396          *
6397          * In the unlikely case that a controller just sends a scan
6398          * response event that doesn't match the pending report, then
6399          * it is marked as a standalone SCAN_RSP.
6400          */
6401         if (type == LE_ADV_SCAN_RSP)
6402                 flags = MGMT_DEV_FOUND_SCAN_RSP;
6403
6404         /* If there's nothing pending either store the data from this
6405          * event or send an immediate device found event if the data
6406          * should not be stored for later.
6407          */
6408         if (!ext_adv && !has_pending_adv_report(hdev)) {
6409                 /* If the report will trigger a SCAN_REQ store it for
6410                  * later merging.
6411                  */
6412                 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6413                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6414                                                  rssi, flags, data, len);
6415                         return;
6416                 }
6417
6418                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6419                                   rssi, flags, data, len, NULL, 0, 0);
6420                 return;
6421         }
6422
6423         /* Check if the pending report is for the same device as the new one */
6424         match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6425                  bdaddr_type == d->last_adv_addr_type);
6426
6427         /* If the pending data doesn't match this report or this isn't a
6428          * scan response (e.g. we got a duplicate ADV_IND) then force
6429          * sending of the pending data.
6430          */
6431         if (type != LE_ADV_SCAN_RSP || !match) {
6432                 /* Send out whatever is in the cache, but skip duplicates */
6433                 if (!match)
6434                         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6435                                           d->last_adv_addr_type, NULL,
6436                                           d->last_adv_rssi, d->last_adv_flags,
6437                                           d->last_adv_data,
6438                                           d->last_adv_data_len, NULL, 0, 0);
6439
6440                 /* If the new report will trigger a SCAN_REQ store it for
6441                  * later merging.
6442                  */
6443                 if (!ext_adv && (type == LE_ADV_IND ||
6444                                  type == LE_ADV_SCAN_IND)) {
6445                         store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6446                                                  rssi, flags, data, len);
6447                         return;
6448                 }
6449
6450                 /* The advertising reports cannot be merged, so clear
6451                  * the pending report and send out a device found event.
6452                  */
6453                 clear_pending_adv_report(hdev);
6454                 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6455                                   rssi, flags, data, len, NULL, 0, 0);
6456                 return;
6457         }
6458
6459         /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6460          * the new event is a SCAN_RSP. We can therefore proceed with
6461          * sending a merged device found event.
6462          */
6463         mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6464                           d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6465                           d->last_adv_data, d->last_adv_data_len, data, len, 0);
6466         clear_pending_adv_report(hdev);
6467 }
6468
6469 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6470                                   struct sk_buff *skb)
6471 {
6472         struct hci_ev_le_advertising_report *ev = data;
6473         u64 instant = jiffies;
6474
6475         if (!ev->num)
6476                 return;
6477
6478         hci_dev_lock(hdev);
6479
6480         while (ev->num--) {
6481                 struct hci_ev_le_advertising_info *info;
6482                 s8 rssi;
6483
6484                 info = hci_le_ev_skb_pull(hdev, skb,
6485                                           HCI_EV_LE_ADVERTISING_REPORT,
6486                                           sizeof(*info));
6487                 if (!info)
6488                         break;
6489
6490                 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6491                                         info->length + 1))
6492                         break;
6493
6494                 if (info->length <= max_adv_len(hdev)) {
6495                         rssi = info->data[info->length];
6496                         process_adv_report(hdev, info->type, &info->bdaddr,
6497                                            info->bdaddr_type, NULL, 0, rssi,
6498                                            info->data, info->length, false,
6499                                            false, instant);
6500                 } else {
6501                         bt_dev_err(hdev, "Dropping invalid advertising data");
6502                 }
6503         }
6504
6505         hci_dev_unlock(hdev);
6506 }
6507
6508 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6509 {
6510         if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6511                 switch (evt_type) {
6512                 case LE_LEGACY_ADV_IND:
6513                         return LE_ADV_IND;
6514                 case LE_LEGACY_ADV_DIRECT_IND:
6515                         return LE_ADV_DIRECT_IND;
6516                 case LE_LEGACY_ADV_SCAN_IND:
6517                         return LE_ADV_SCAN_IND;
6518                 case LE_LEGACY_NONCONN_IND:
6519                         return LE_ADV_NONCONN_IND;
6520                 case LE_LEGACY_SCAN_RSP_ADV:
6521                 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6522                         return LE_ADV_SCAN_RSP;
6523                 }
6524
6525                 goto invalid;
6526         }
6527
6528         if (evt_type & LE_EXT_ADV_CONN_IND) {
6529                 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6530                         return LE_ADV_DIRECT_IND;
6531
6532                 return LE_ADV_IND;
6533         }
6534
6535         if (evt_type & LE_EXT_ADV_SCAN_RSP)
6536                 return LE_ADV_SCAN_RSP;
6537
6538         if (evt_type & LE_EXT_ADV_SCAN_IND)
6539                 return LE_ADV_SCAN_IND;
6540
6541         if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6542             evt_type & LE_EXT_ADV_DIRECT_IND)
6543                 return LE_ADV_NONCONN_IND;
6544
6545 invalid:
6546         bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6547                                evt_type);
6548
6549         return LE_ADV_INVALID;
6550 }
6551
6552 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6553                                       struct sk_buff *skb)
6554 {
6555         struct hci_ev_le_ext_adv_report *ev = data;
6556         u64 instant = jiffies;
6557
6558         if (!ev->num)
6559                 return;
6560
6561         hci_dev_lock(hdev);
6562
6563         while (ev->num--) {
6564                 struct hci_ev_le_ext_adv_info *info;
6565                 u8 legacy_evt_type;
6566                 u16 evt_type;
6567
6568                 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6569                                           sizeof(*info));
6570                 if (!info)
6571                         break;
6572
6573                 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6574                                         info->length))
6575                         break;
6576
6577                 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6578                 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6579                 if (legacy_evt_type != LE_ADV_INVALID) {
6580                         process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6581                                            info->bdaddr_type, NULL, 0,
6582                                            info->rssi, info->data, info->length,
6583                                            !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6584                                            false, instant);
6585                 }
6586         }
6587
6588         hci_dev_unlock(hdev);
6589 }
6590
6591 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6592 {
6593         struct hci_cp_le_pa_term_sync cp;
6594
6595         memset(&cp, 0, sizeof(cp));
6596         cp.handle = handle;
6597
6598         return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6599 }
6600
6601 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6602                                             struct sk_buff *skb)
6603 {
6604         struct hci_ev_le_pa_sync_established *ev = data;
6605         int mask = hdev->link_mode;
6606         __u8 flags = 0;
6607         struct hci_conn *bis;
6608
6609         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6610
6611         hci_dev_lock(hdev);
6612
6613         hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6614
6615         mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6616         if (!(mask & HCI_LM_ACCEPT)) {
6617                 hci_le_pa_term_sync(hdev, ev->handle);
6618                 goto unlock;
6619         }
6620
6621         if (!(flags & HCI_PROTO_DEFER))
6622                 goto unlock;
6623
6624         /* Add connection to indicate the PA sync event */
6625         bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6626                            HCI_ROLE_SLAVE);
6627
6628         if (!bis)
6629                 goto unlock;
6630
6631         if (ev->status)
6632                 set_bit(HCI_CONN_PA_SYNC_FAILED, &bis->flags);
6633         else
6634                 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6635
6636         /* Notify connection to iso layer */
6637         hci_connect_cfm(bis, ev->status);
6638
6639 unlock:
6640         hci_dev_unlock(hdev);
6641 }
6642
6643 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6644                                       struct sk_buff *skb)
6645 {
6646         struct hci_ev_le_per_adv_report *ev = data;
6647         int mask = hdev->link_mode;
6648         __u8 flags = 0;
6649
6650         bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6651
6652         hci_dev_lock(hdev);
6653
6654         mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6655         if (!(mask & HCI_LM_ACCEPT))
6656                 hci_le_pa_term_sync(hdev, ev->sync_handle);
6657
6658         hci_dev_unlock(hdev);
6659 }
6660
6661 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6662                                             struct sk_buff *skb)
6663 {
6664         struct hci_ev_le_remote_feat_complete *ev = data;
6665         struct hci_conn *conn;
6666
6667         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6668
6669         hci_dev_lock(hdev);
6670
6671         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6672         if (conn) {
6673                 if (!ev->status)
6674                         memcpy(conn->features[0], ev->features, 8);
6675
6676                 if (conn->state == BT_CONFIG) {
6677                         __u8 status;
6678
6679                         /* If the local controller supports peripheral-initiated
6680                          * features exchange, but the remote controller does
6681                          * not, then it is possible that the error code 0x1a
6682                          * for unsupported remote feature gets returned.
6683                          *
6684                          * In this specific case, allow the connection to
6685                          * transition into connected state and mark it as
6686                          * successful.
6687                          */
6688                         if (!conn->out && ev->status == 0x1a &&
6689                             (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6690                                 status = 0x00;
6691                         else
6692                                 status = ev->status;
6693
6694                         conn->state = BT_CONNECTED;
6695                         hci_connect_cfm(conn, status);
6696                         hci_conn_drop(conn);
6697                 }
6698         }
6699
6700         hci_dev_unlock(hdev);
6701 }
6702
6703 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6704                                    struct sk_buff *skb)
6705 {
6706         struct hci_ev_le_ltk_req *ev = data;
6707         struct hci_cp_le_ltk_reply cp;
6708         struct hci_cp_le_ltk_neg_reply neg;
6709         struct hci_conn *conn;
6710         struct smp_ltk *ltk;
6711
6712         bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6713
6714         hci_dev_lock(hdev);
6715
6716         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6717         if (conn == NULL)
6718                 goto not_found;
6719
6720         ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6721         if (!ltk)
6722                 goto not_found;
6723
6724         if (smp_ltk_is_sc(ltk)) {
6725                 /* With SC both EDiv and Rand are set to zero */
6726                 if (ev->ediv || ev->rand)
6727                         goto not_found;
6728         } else {
6729                 /* For non-SC keys check that EDiv and Rand match */
6730                 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6731                         goto not_found;
6732         }
6733
6734         memcpy(cp.ltk, ltk->val, ltk->enc_size);
6735         memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6736         cp.handle = cpu_to_le16(conn->handle);
6737
6738         conn->pending_sec_level = smp_ltk_sec_level(ltk);
6739
6740         conn->enc_key_size = ltk->enc_size;
6741
6742         hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6743
6744         /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6745          * temporary key used to encrypt a connection following
6746          * pairing. It is used during the Encrypted Session Setup to
6747          * distribute the keys. Later, security can be re-established
6748          * using a distributed LTK.
6749          */
6750         if (ltk->type == SMP_STK) {
6751                 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6752                 list_del_rcu(&ltk->list);
6753                 kfree_rcu(ltk, rcu);
6754         } else {
6755                 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6756         }
6757
6758         hci_dev_unlock(hdev);
6759
6760         return;
6761
6762 not_found:
6763         neg.handle = ev->handle;
6764         hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6765         hci_dev_unlock(hdev);
6766 }
6767
6768 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6769                                       u8 reason)
6770 {
6771         struct hci_cp_le_conn_param_req_neg_reply cp;
6772
6773         cp.handle = cpu_to_le16(handle);
6774         cp.reason = reason;
6775
6776         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6777                      &cp);
6778 }
6779
6780 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6781                                              struct sk_buff *skb)
6782 {
6783         struct hci_ev_le_remote_conn_param_req *ev = data;
6784         struct hci_cp_le_conn_param_req_reply cp;
6785         struct hci_conn *hcon;
6786         u16 handle, min, max, latency, timeout;
6787
6788         bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6789
6790         handle = le16_to_cpu(ev->handle);
6791         min = le16_to_cpu(ev->interval_min);
6792         max = le16_to_cpu(ev->interval_max);
6793         latency = le16_to_cpu(ev->latency);
6794         timeout = le16_to_cpu(ev->timeout);
6795
6796         hcon = hci_conn_hash_lookup_handle(hdev, handle);
6797         if (!hcon || hcon->state != BT_CONNECTED)
6798                 return send_conn_param_neg_reply(hdev, handle,
6799                                                  HCI_ERROR_UNKNOWN_CONN_ID);
6800
6801         if (hci_check_conn_params(min, max, latency, timeout))
6802                 return send_conn_param_neg_reply(hdev, handle,
6803                                                  HCI_ERROR_INVALID_LL_PARAMS);
6804
6805         if (hcon->role == HCI_ROLE_MASTER) {
6806                 struct hci_conn_params *params;
6807                 u8 store_hint;
6808
6809                 hci_dev_lock(hdev);
6810
6811                 params = hci_conn_params_lookup(hdev, &hcon->dst,
6812                                                 hcon->dst_type);
6813                 if (params) {
6814                         params->conn_min_interval = min;
6815                         params->conn_max_interval = max;
6816                         params->conn_latency = latency;
6817                         params->supervision_timeout = timeout;
6818                         store_hint = 0x01;
6819                 } else {
6820                         store_hint = 0x00;
6821                 }
6822
6823                 hci_dev_unlock(hdev);
6824
6825                 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6826                                     store_hint, min, max, latency, timeout);
6827         }
6828
6829         cp.handle = ev->handle;
6830         cp.interval_min = ev->interval_min;
6831         cp.interval_max = ev->interval_max;
6832         cp.latency = ev->latency;
6833         cp.timeout = ev->timeout;
6834         cp.min_ce_len = 0;
6835         cp.max_ce_len = 0;
6836
6837         hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6838 }
6839
6840 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6841                                          struct sk_buff *skb)
6842 {
6843         struct hci_ev_le_direct_adv_report *ev = data;
6844         u64 instant = jiffies;
6845         int i;
6846
6847         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6848                                 flex_array_size(ev, info, ev->num)))
6849                 return;
6850
6851         if (!ev->num)
6852                 return;
6853
6854         hci_dev_lock(hdev);
6855
6856         for (i = 0; i < ev->num; i++) {
6857                 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6858
6859                 process_adv_report(hdev, info->type, &info->bdaddr,
6860                                    info->bdaddr_type, &info->direct_addr,
6861                                    info->direct_addr_type, info->rssi, NULL, 0,
6862                                    false, false, instant);
6863         }
6864
6865         hci_dev_unlock(hdev);
6866 }
6867
6868 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6869                                   struct sk_buff *skb)
6870 {
6871         struct hci_ev_le_phy_update_complete *ev = data;
6872         struct hci_conn *conn;
6873
6874         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6875
6876         if (ev->status)
6877                 return;
6878
6879         hci_dev_lock(hdev);
6880
6881         conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6882         if (!conn)
6883                 goto unlock;
6884
6885         conn->le_tx_phy = ev->tx_phy;
6886         conn->le_rx_phy = ev->rx_phy;
6887
6888 unlock:
6889         hci_dev_unlock(hdev);
6890 }
6891
6892 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6893                                         struct sk_buff *skb)
6894 {
6895         struct hci_evt_le_cis_established *ev = data;
6896         struct hci_conn *conn;
6897         struct bt_iso_qos *qos;
6898         bool pending = false;
6899         u16 handle = __le16_to_cpu(ev->handle);
6900
6901         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6902
6903         hci_dev_lock(hdev);
6904
6905         conn = hci_conn_hash_lookup_handle(hdev, handle);
6906         if (!conn) {
6907                 bt_dev_err(hdev,
6908                            "Unable to find connection with handle 0x%4.4x",
6909                            handle);
6910                 goto unlock;
6911         }
6912
6913         if (conn->type != ISO_LINK) {
6914                 bt_dev_err(hdev,
6915                            "Invalid connection link type handle 0x%4.4x",
6916                            handle);
6917                 goto unlock;
6918         }
6919
6920         qos = &conn->iso_qos;
6921
6922         pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6923
6924         /* Convert ISO Interval (1.25 ms slots) to SDU Interval (us) */
6925         qos->ucast.in.interval = le16_to_cpu(ev->interval) * 1250;
6926         qos->ucast.out.interval = qos->ucast.in.interval;
6927
6928         switch (conn->role) {
6929         case HCI_ROLE_SLAVE:
6930                 /* Convert Transport Latency (us) to Latency (msec) */
6931                 qos->ucast.in.latency =
6932                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6933                                           1000);
6934                 qos->ucast.out.latency =
6935                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6936                                           1000);
6937                 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6938                 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6939                 qos->ucast.in.phy = ev->c_phy;
6940                 qos->ucast.out.phy = ev->p_phy;
6941                 break;
6942         case HCI_ROLE_MASTER:
6943                 /* Convert Transport Latency (us) to Latency (msec) */
6944                 qos->ucast.out.latency =
6945                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6946                                           1000);
6947                 qos->ucast.in.latency =
6948                         DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6949                                           1000);
6950                 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6951                 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6952                 qos->ucast.out.phy = ev->c_phy;
6953                 qos->ucast.in.phy = ev->p_phy;
6954                 break;
6955         }
6956
6957         if (!ev->status) {
6958                 conn->state = BT_CONNECTED;
6959                 hci_debugfs_create_conn(conn);
6960                 hci_conn_add_sysfs(conn);
6961                 hci_iso_setup_path(conn);
6962                 goto unlock;
6963         }
6964
6965         conn->state = BT_CLOSED;
6966         hci_connect_cfm(conn, ev->status);
6967         hci_conn_del(conn);
6968
6969 unlock:
6970         if (pending)
6971                 hci_le_create_cis_pending(hdev);
6972
6973         hci_dev_unlock(hdev);
6974 }
6975
6976 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6977 {
6978         struct hci_cp_le_reject_cis cp;
6979
6980         memset(&cp, 0, sizeof(cp));
6981         cp.handle = handle;
6982         cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6983         hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6984 }
6985
6986 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6987 {
6988         struct hci_cp_le_accept_cis cp;
6989
6990         memset(&cp, 0, sizeof(cp));
6991         cp.handle = handle;
6992         hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6993 }
6994
6995 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6996                                struct sk_buff *skb)
6997 {
6998         struct hci_evt_le_cis_req *ev = data;
6999         u16 acl_handle, cis_handle;
7000         struct hci_conn *acl, *cis;
7001         int mask;
7002         __u8 flags = 0;
7003
7004         acl_handle = __le16_to_cpu(ev->acl_handle);
7005         cis_handle = __le16_to_cpu(ev->cis_handle);
7006
7007         bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
7008                    acl_handle, cis_handle, ev->cig_id, ev->cis_id);
7009
7010         hci_dev_lock(hdev);
7011
7012         acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
7013         if (!acl)
7014                 goto unlock;
7015
7016         mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
7017         if (!(mask & HCI_LM_ACCEPT)) {
7018                 hci_le_reject_cis(hdev, ev->cis_handle);
7019                 goto unlock;
7020         }
7021
7022         cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
7023         if (!cis) {
7024                 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE);
7025                 if (!cis) {
7026                         hci_le_reject_cis(hdev, ev->cis_handle);
7027                         goto unlock;
7028                 }
7029                 cis->handle = cis_handle;
7030         }
7031
7032         cis->iso_qos.ucast.cig = ev->cig_id;
7033         cis->iso_qos.ucast.cis = ev->cis_id;
7034
7035         if (!(flags & HCI_PROTO_DEFER)) {
7036                 hci_le_accept_cis(hdev, ev->cis_handle);
7037         } else {
7038                 cis->state = BT_CONNECT2;
7039                 hci_connect_cfm(cis, 0);
7040         }
7041
7042 unlock:
7043         hci_dev_unlock(hdev);
7044 }
7045
7046 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
7047 {
7048         u8 handle = PTR_UINT(data);
7049
7050         return hci_le_terminate_big_sync(hdev, handle,
7051                                          HCI_ERROR_LOCAL_HOST_TERM);
7052 }
7053
7054 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
7055                                            struct sk_buff *skb)
7056 {
7057         struct hci_evt_le_create_big_complete *ev = data;
7058         struct hci_conn *conn;
7059         __u8 i = 0;
7060
7061         BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
7062
7063         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
7064                                 flex_array_size(ev, bis_handle, ev->num_bis)))
7065                 return;
7066
7067         hci_dev_lock(hdev);
7068         rcu_read_lock();
7069
7070         /* Connect all BISes that are bound to the BIG */
7071         list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7072                 if (bacmp(&conn->dst, BDADDR_ANY) ||
7073                     conn->type != ISO_LINK ||
7074                     conn->iso_qos.bcast.big != ev->handle)
7075                         continue;
7076
7077                 if (hci_conn_set_handle(conn,
7078                                         __le16_to_cpu(ev->bis_handle[i++])))
7079                         continue;
7080
7081                 if (!ev->status) {
7082                         conn->state = BT_CONNECTED;
7083                         set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
7084                         rcu_read_unlock();
7085                         hci_debugfs_create_conn(conn);
7086                         hci_conn_add_sysfs(conn);
7087                         hci_iso_setup_path(conn);
7088                         rcu_read_lock();
7089                         continue;
7090                 }
7091
7092                 hci_connect_cfm(conn, ev->status);
7093                 rcu_read_unlock();
7094                 hci_conn_del(conn);
7095                 rcu_read_lock();
7096         }
7097
7098         rcu_read_unlock();
7099
7100         if (!ev->status && !i)
7101                 /* If no BISes have been connected for the BIG,
7102                  * terminate. This is in case all bound connections
7103                  * have been closed before the BIG creation
7104                  * has completed.
7105                  */
7106                 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
7107                                    UINT_PTR(ev->handle), NULL);
7108
7109         hci_dev_unlock(hdev);
7110 }
7111
7112 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
7113                                             struct sk_buff *skb)
7114 {
7115         struct hci_evt_le_big_sync_estabilished *ev = data;
7116         struct hci_conn *bis;
7117         struct hci_conn *pa_sync;
7118         int i;
7119
7120         bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
7121
7122         if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7123                                 flex_array_size(ev, bis, ev->num_bis)))
7124                 return;
7125
7126         hci_dev_lock(hdev);
7127
7128         if (!ev->status) {
7129                 pa_sync = hci_conn_hash_lookup_pa_sync(hdev, ev->handle);
7130                 if (pa_sync)
7131                         /* Also mark the BIG sync established event on the
7132                          * associated PA sync hcon
7133                          */
7134                         set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags);
7135         }
7136
7137         for (i = 0; i < ev->num_bis; i++) {
7138                 u16 handle = le16_to_cpu(ev->bis[i]);
7139                 __le32 interval;
7140
7141                 bis = hci_conn_hash_lookup_handle(hdev, handle);
7142                 if (!bis) {
7143                         bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
7144                                            HCI_ROLE_SLAVE);
7145                         if (!bis)
7146                                 continue;
7147                         bis->handle = handle;
7148                 }
7149
7150                 if (ev->status != 0x42)
7151                         /* Mark PA sync as established */
7152                         set_bit(HCI_CONN_PA_SYNC, &bis->flags);
7153
7154                 bis->iso_qos.bcast.big = ev->handle;
7155                 memset(&interval, 0, sizeof(interval));
7156                 memcpy(&interval, ev->latency, sizeof(ev->latency));
7157                 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
7158                 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
7159                 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
7160                 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
7161
7162                 if (!ev->status) {
7163                         set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
7164                         hci_iso_setup_path(bis);
7165                 }
7166         }
7167
7168         /* In case BIG sync failed, notify each failed connection to
7169          * the user after all hci connections have been added
7170          */
7171         if (ev->status)
7172                 for (i = 0; i < ev->num_bis; i++) {
7173                         u16 handle = le16_to_cpu(ev->bis[i]);
7174
7175                         bis = hci_conn_hash_lookup_handle(hdev, handle);
7176
7177                         set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
7178                         hci_connect_cfm(bis, ev->status);
7179                 }
7180
7181         hci_dev_unlock(hdev);
7182 }
7183
7184 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7185                                            struct sk_buff *skb)
7186 {
7187         struct hci_evt_le_big_info_adv_report *ev = data;
7188         int mask = hdev->link_mode;
7189         __u8 flags = 0;
7190
7191         bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7192
7193         hci_dev_lock(hdev);
7194
7195         mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
7196         if (!(mask & HCI_LM_ACCEPT))
7197                 hci_le_pa_term_sync(hdev, ev->sync_handle);
7198
7199         hci_dev_unlock(hdev);
7200 }
7201
7202 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7203 [_op] = { \
7204         .func = _func, \
7205         .min_len = _min_len, \
7206         .max_len = _max_len, \
7207 }
7208
7209 #define HCI_LE_EV(_op, _func, _len) \
7210         HCI_LE_EV_VL(_op, _func, _len, _len)
7211
7212 #define HCI_LE_EV_STATUS(_op, _func) \
7213         HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7214
7215 /* Entries in this table shall have their position according to the subevent
7216  * opcode they handle so the use of the macros above is recommend since it does
7217  * attempt to initialize at its proper index using Designated Initializers that
7218  * way events without a callback function can be ommited.
7219  */
7220 static const struct hci_le_ev {
7221         void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7222         u16  min_len;
7223         u16  max_len;
7224 } hci_le_ev_table[U8_MAX + 1] = {
7225         /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7226         HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7227                   sizeof(struct hci_ev_le_conn_complete)),
7228         /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7229         HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7230                      sizeof(struct hci_ev_le_advertising_report),
7231                      HCI_MAX_EVENT_SIZE),
7232         /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7233         HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7234                   hci_le_conn_update_complete_evt,
7235                   sizeof(struct hci_ev_le_conn_update_complete)),
7236         /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7237         HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7238                   hci_le_remote_feat_complete_evt,
7239                   sizeof(struct hci_ev_le_remote_feat_complete)),
7240         /* [0x05 = HCI_EV_LE_LTK_REQ] */
7241         HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7242                   sizeof(struct hci_ev_le_ltk_req)),
7243         /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7244         HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7245                   hci_le_remote_conn_param_req_evt,
7246                   sizeof(struct hci_ev_le_remote_conn_param_req)),
7247         /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7248         HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7249                   hci_le_enh_conn_complete_evt,
7250                   sizeof(struct hci_ev_le_enh_conn_complete)),
7251         /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7252         HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7253                      sizeof(struct hci_ev_le_direct_adv_report),
7254                      HCI_MAX_EVENT_SIZE),
7255         /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7256         HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7257                   sizeof(struct hci_ev_le_phy_update_complete)),
7258         /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7259         HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7260                      sizeof(struct hci_ev_le_ext_adv_report),
7261                      HCI_MAX_EVENT_SIZE),
7262         /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7263         HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7264                   hci_le_pa_sync_estabilished_evt,
7265                   sizeof(struct hci_ev_le_pa_sync_established)),
7266         /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7267         HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7268                                  hci_le_per_adv_report_evt,
7269                                  sizeof(struct hci_ev_le_per_adv_report),
7270                                  HCI_MAX_EVENT_SIZE),
7271         /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7272         HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7273                   sizeof(struct hci_evt_le_ext_adv_set_term)),
7274         /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7275         HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7276                   sizeof(struct hci_evt_le_cis_established)),
7277         /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7278         HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7279                   sizeof(struct hci_evt_le_cis_req)),
7280         /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7281         HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7282                      hci_le_create_big_complete_evt,
7283                      sizeof(struct hci_evt_le_create_big_complete),
7284                      HCI_MAX_EVENT_SIZE),
7285         /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7286         HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7287                      hci_le_big_sync_established_evt,
7288                      sizeof(struct hci_evt_le_big_sync_estabilished),
7289                      HCI_MAX_EVENT_SIZE),
7290         /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7291         HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7292                      hci_le_big_info_adv_report_evt,
7293                      sizeof(struct hci_evt_le_big_info_adv_report),
7294                      HCI_MAX_EVENT_SIZE),
7295 };
7296
7297 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7298                             struct sk_buff *skb, u16 *opcode, u8 *status,
7299                             hci_req_complete_t *req_complete,
7300                             hci_req_complete_skb_t *req_complete_skb)
7301 {
7302         struct hci_ev_le_meta *ev = data;
7303         const struct hci_le_ev *subev;
7304
7305         bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7306
7307         /* Only match event if command OGF is for LE */
7308         if (hdev->sent_cmd &&
7309             hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) == 0x08 &&
7310             hci_skb_event(hdev->sent_cmd) == ev->subevent) {
7311                 *opcode = hci_skb_opcode(hdev->sent_cmd);
7312                 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7313                                      req_complete_skb);
7314         }
7315
7316         subev = &hci_le_ev_table[ev->subevent];
7317         if (!subev->func)
7318                 return;
7319
7320         if (skb->len < subev->min_len) {
7321                 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7322                            ev->subevent, skb->len, subev->min_len);
7323                 return;
7324         }
7325
7326         /* Just warn if the length is over max_len size it still be
7327          * possible to partially parse the event so leave to callback to
7328          * decide if that is acceptable.
7329          */
7330         if (skb->len > subev->max_len)
7331                 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7332                             ev->subevent, skb->len, subev->max_len);
7333         data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7334         if (!data)
7335                 return;
7336
7337         subev->func(hdev, data, skb);
7338 }
7339
7340 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7341                                  u8 event, struct sk_buff *skb)
7342 {
7343         struct hci_ev_cmd_complete *ev;
7344         struct hci_event_hdr *hdr;
7345
7346         if (!skb)
7347                 return false;
7348
7349         hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7350         if (!hdr)
7351                 return false;
7352
7353         if (event) {
7354                 if (hdr->evt != event)
7355                         return false;
7356                 return true;
7357         }
7358
7359         /* Check if request ended in Command Status - no way to retrieve
7360          * any extra parameters in this case.
7361          */
7362         if (hdr->evt == HCI_EV_CMD_STATUS)
7363                 return false;
7364
7365         if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7366                 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7367                            hdr->evt);
7368                 return false;
7369         }
7370
7371         ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7372         if (!ev)
7373                 return false;
7374
7375         if (opcode != __le16_to_cpu(ev->opcode)) {
7376                 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7377                        __le16_to_cpu(ev->opcode));
7378                 return false;
7379         }
7380
7381         return true;
7382 }
7383
7384 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7385                                   struct sk_buff *skb)
7386 {
7387         struct hci_ev_le_advertising_info *adv;
7388         struct hci_ev_le_direct_adv_info *direct_adv;
7389         struct hci_ev_le_ext_adv_info *ext_adv;
7390         const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7391         const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7392
7393         hci_dev_lock(hdev);
7394
7395         /* If we are currently suspended and this is the first BT event seen,
7396          * save the wake reason associated with the event.
7397          */
7398         if (!hdev->suspended || hdev->wake_reason)
7399                 goto unlock;
7400
7401         /* Default to remote wake. Values for wake_reason are documented in the
7402          * Bluez mgmt api docs.
7403          */
7404         hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7405
7406         /* Once configured for remote wakeup, we should only wake up for
7407          * reconnections. It's useful to see which device is waking us up so
7408          * keep track of the bdaddr of the connection event that woke us up.
7409          */
7410         if (event == HCI_EV_CONN_REQUEST) {
7411                 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7412                 hdev->wake_addr_type = BDADDR_BREDR;
7413         } else if (event == HCI_EV_CONN_COMPLETE) {
7414                 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7415                 hdev->wake_addr_type = BDADDR_BREDR;
7416         } else if (event == HCI_EV_LE_META) {
7417                 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7418                 u8 subevent = le_ev->subevent;
7419                 u8 *ptr = &skb->data[sizeof(*le_ev)];
7420                 u8 num_reports = *ptr;
7421
7422                 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7423                      subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7424                      subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7425                     num_reports) {
7426                         adv = (void *)(ptr + 1);
7427                         direct_adv = (void *)(ptr + 1);
7428                         ext_adv = (void *)(ptr + 1);
7429
7430                         switch (subevent) {
7431                         case HCI_EV_LE_ADVERTISING_REPORT:
7432                                 bacpy(&hdev->wake_addr, &adv->bdaddr);
7433                                 hdev->wake_addr_type = adv->bdaddr_type;
7434                                 break;
7435                         case HCI_EV_LE_DIRECT_ADV_REPORT:
7436                                 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7437                                 hdev->wake_addr_type = direct_adv->bdaddr_type;
7438                                 break;
7439                         case HCI_EV_LE_EXT_ADV_REPORT:
7440                                 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7441                                 hdev->wake_addr_type = ext_adv->bdaddr_type;
7442                                 break;
7443                         }
7444                 }
7445         } else {
7446                 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7447         }
7448
7449 unlock:
7450         hci_dev_unlock(hdev);
7451 }
7452
7453 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7454 [_op] = { \
7455         .req = false, \
7456         .func = _func, \
7457         .min_len = _min_len, \
7458         .max_len = _max_len, \
7459 }
7460
7461 #define HCI_EV(_op, _func, _len) \
7462         HCI_EV_VL(_op, _func, _len, _len)
7463
7464 #define HCI_EV_STATUS(_op, _func) \
7465         HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7466
7467 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7468 [_op] = { \
7469         .req = true, \
7470         .func_req = _func, \
7471         .min_len = _min_len, \
7472         .max_len = _max_len, \
7473 }
7474
7475 #define HCI_EV_REQ(_op, _func, _len) \
7476         HCI_EV_REQ_VL(_op, _func, _len, _len)
7477
7478 /* Entries in this table shall have their position according to the event opcode
7479  * they handle so the use of the macros above is recommend since it does attempt
7480  * to initialize at its proper index using Designated Initializers that way
7481  * events without a callback function don't have entered.
7482  */
7483 static const struct hci_ev {
7484         bool req;
7485         union {
7486                 void (*func)(struct hci_dev *hdev, void *data,
7487                              struct sk_buff *skb);
7488                 void (*func_req)(struct hci_dev *hdev, void *data,
7489                                  struct sk_buff *skb, u16 *opcode, u8 *status,
7490                                  hci_req_complete_t *req_complete,
7491                                  hci_req_complete_skb_t *req_complete_skb);
7492         };
7493         u16  min_len;
7494         u16  max_len;
7495 } hci_ev_table[U8_MAX + 1] = {
7496         /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7497         HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7498         /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7499         HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7500                   sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7501         /* [0x03 = HCI_EV_CONN_COMPLETE] */
7502         HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7503                sizeof(struct hci_ev_conn_complete)),
7504         /* [0x04 = HCI_EV_CONN_REQUEST] */
7505         HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7506                sizeof(struct hci_ev_conn_request)),
7507         /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7508         HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7509                sizeof(struct hci_ev_disconn_complete)),
7510         /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7511         HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7512                sizeof(struct hci_ev_auth_complete)),
7513         /* [0x07 = HCI_EV_REMOTE_NAME] */
7514         HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7515                sizeof(struct hci_ev_remote_name)),
7516         /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7517         HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7518                sizeof(struct hci_ev_encrypt_change)),
7519         /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7520         HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7521                hci_change_link_key_complete_evt,
7522                sizeof(struct hci_ev_change_link_key_complete)),
7523         /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7524         HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7525                sizeof(struct hci_ev_remote_features)),
7526         /* [0x0e = HCI_EV_CMD_COMPLETE] */
7527         HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7528                       sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7529         /* [0x0f = HCI_EV_CMD_STATUS] */
7530         HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7531                    sizeof(struct hci_ev_cmd_status)),
7532         /* [0x10 = HCI_EV_CMD_STATUS] */
7533         HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7534                sizeof(struct hci_ev_hardware_error)),
7535         /* [0x12 = HCI_EV_ROLE_CHANGE] */
7536         HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7537                sizeof(struct hci_ev_role_change)),
7538         /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7539         HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7540                   sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7541         /* [0x14 = HCI_EV_MODE_CHANGE] */
7542         HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7543                sizeof(struct hci_ev_mode_change)),
7544         /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7545         HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7546                sizeof(struct hci_ev_pin_code_req)),
7547         /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7548         HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7549                sizeof(struct hci_ev_link_key_req)),
7550         /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7551         HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7552                sizeof(struct hci_ev_link_key_notify)),
7553         /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7554         HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7555                sizeof(struct hci_ev_clock_offset)),
7556         /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7557         HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7558                sizeof(struct hci_ev_pkt_type_change)),
7559         /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7560         HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7561                sizeof(struct hci_ev_pscan_rep_mode)),
7562         /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7563         HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7564                   hci_inquiry_result_with_rssi_evt,
7565                   sizeof(struct hci_ev_inquiry_result_rssi),
7566                   HCI_MAX_EVENT_SIZE),
7567         /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7568         HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7569                sizeof(struct hci_ev_remote_ext_features)),
7570         /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7571         HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7572                sizeof(struct hci_ev_sync_conn_complete)),
7573         /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7574         HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7575                   hci_extended_inquiry_result_evt,
7576                   sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7577         /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7578         HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7579                sizeof(struct hci_ev_key_refresh_complete)),
7580         /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7581         HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7582                sizeof(struct hci_ev_io_capa_request)),
7583         /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7584         HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7585                sizeof(struct hci_ev_io_capa_reply)),
7586         /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7587         HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7588                sizeof(struct hci_ev_user_confirm_req)),
7589         /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7590         HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7591                sizeof(struct hci_ev_user_passkey_req)),
7592         /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7593         HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7594                sizeof(struct hci_ev_remote_oob_data_request)),
7595         /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7596         HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7597                sizeof(struct hci_ev_simple_pair_complete)),
7598         /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7599         HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7600                sizeof(struct hci_ev_user_passkey_notify)),
7601         /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7602         HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7603                sizeof(struct hci_ev_keypress_notify)),
7604         /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7605         HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7606                sizeof(struct hci_ev_remote_host_features)),
7607         /* [0x3e = HCI_EV_LE_META] */
7608         HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7609                       sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7610 #if IS_ENABLED(CONFIG_BT_HS)
7611         /* [0x40 = HCI_EV_PHY_LINK_COMPLETE] */
7612         HCI_EV(HCI_EV_PHY_LINK_COMPLETE, hci_phy_link_complete_evt,
7613                sizeof(struct hci_ev_phy_link_complete)),
7614         /* [0x41 = HCI_EV_CHANNEL_SELECTED] */
7615         HCI_EV(HCI_EV_CHANNEL_SELECTED, hci_chan_selected_evt,
7616                sizeof(struct hci_ev_channel_selected)),
7617         /* [0x42 = HCI_EV_DISCONN_PHY_LINK_COMPLETE] */
7618         HCI_EV(HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE,
7619                hci_disconn_loglink_complete_evt,
7620                sizeof(struct hci_ev_disconn_logical_link_complete)),
7621         /* [0x45 = HCI_EV_LOGICAL_LINK_COMPLETE] */
7622         HCI_EV(HCI_EV_LOGICAL_LINK_COMPLETE, hci_loglink_complete_evt,
7623                sizeof(struct hci_ev_logical_link_complete)),
7624         /* [0x46 = HCI_EV_DISCONN_LOGICAL_LINK_COMPLETE] */
7625         HCI_EV(HCI_EV_DISCONN_PHY_LINK_COMPLETE,
7626                hci_disconn_phylink_complete_evt,
7627                sizeof(struct hci_ev_disconn_phy_link_complete)),
7628 #endif
7629         /* [0x48 = HCI_EV_NUM_COMP_BLOCKS] */
7630         HCI_EV(HCI_EV_NUM_COMP_BLOCKS, hci_num_comp_blocks_evt,
7631                sizeof(struct hci_ev_num_comp_blocks)),
7632         /* [0xff = HCI_EV_VENDOR] */
7633         HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7634 };
7635
7636 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7637                            u16 *opcode, u8 *status,
7638                            hci_req_complete_t *req_complete,
7639                            hci_req_complete_skb_t *req_complete_skb)
7640 {
7641         const struct hci_ev *ev = &hci_ev_table[event];
7642         void *data;
7643
7644         if (!ev->func)
7645                 return;
7646
7647         if (skb->len < ev->min_len) {
7648                 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7649                            event, skb->len, ev->min_len);
7650                 return;
7651         }
7652
7653         /* Just warn if the length is over max_len size it still be
7654          * possible to partially parse the event so leave to callback to
7655          * decide if that is acceptable.
7656          */
7657         if (skb->len > ev->max_len)
7658                 bt_dev_warn_ratelimited(hdev,
7659                                         "unexpected event 0x%2.2x length: %u > %u",
7660                                         event, skb->len, ev->max_len);
7661
7662         data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7663         if (!data)
7664                 return;
7665
7666         if (ev->req)
7667                 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7668                              req_complete_skb);
7669         else
7670                 ev->func(hdev, data, skb);
7671 }
7672
7673 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7674 {
7675         struct hci_event_hdr *hdr = (void *) skb->data;
7676         hci_req_complete_t req_complete = NULL;
7677         hci_req_complete_skb_t req_complete_skb = NULL;
7678         struct sk_buff *orig_skb = NULL;
7679         u8 status = 0, event, req_evt = 0;
7680         u16 opcode = HCI_OP_NOP;
7681
7682         if (skb->len < sizeof(*hdr)) {
7683                 bt_dev_err(hdev, "Malformed HCI Event");
7684                 goto done;
7685         }
7686
7687         kfree_skb(hdev->recv_event);
7688         hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7689
7690         event = hdr->evt;
7691         if (!event) {
7692                 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7693                             event);
7694                 goto done;
7695         }
7696
7697         /* Only match event if command OGF is not for LE */
7698         if (hdev->sent_cmd &&
7699             hci_opcode_ogf(hci_skb_opcode(hdev->sent_cmd)) != 0x08 &&
7700             hci_skb_event(hdev->sent_cmd) == event) {
7701                 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->sent_cmd),
7702                                      status, &req_complete, &req_complete_skb);
7703                 req_evt = event;
7704         }
7705
7706         /* If it looks like we might end up having to call
7707          * req_complete_skb, store a pristine copy of the skb since the
7708          * various handlers may modify the original one through
7709          * skb_pull() calls, etc.
7710          */
7711         if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7712             event == HCI_EV_CMD_COMPLETE)
7713                 orig_skb = skb_clone(skb, GFP_KERNEL);
7714
7715         skb_pull(skb, HCI_EVENT_HDR_SIZE);
7716
7717         /* Store wake reason if we're suspended */
7718         hci_store_wake_reason(hdev, event, skb);
7719
7720         bt_dev_dbg(hdev, "event 0x%2.2x", event);
7721
7722         hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7723                        &req_complete_skb);
7724
7725         if (req_complete) {
7726                 req_complete(hdev, status, opcode);
7727         } else if (req_complete_skb) {
7728                 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7729                         kfree_skb(orig_skb);
7730                         orig_skb = NULL;
7731                 }
7732                 req_complete_skb(hdev, status, opcode, orig_skb);
7733         }
7734
7735 done:
7736         kfree_skb(orig_skb);
7737         kfree_skb(skb);
7738         hdev->stat.evt_rx++;
7739 }