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