1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 BlueZ - Bluetooth protocol stack for Linux 4 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. 5 Copyright 2023-2024 NXP 6 7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 8 9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 20 SOFTWARE IS DISCLAIMED. 21 */ 22 23 /* Bluetooth HCI event handling. */ 24 25 #include <linux/unaligned.h> 26 #include <linux/crypto.h> 27 #include <crypto/algapi.h> 28 29 #include <net/bluetooth/bluetooth.h> 30 #include <net/bluetooth/hci_core.h> 31 #include <net/bluetooth/mgmt.h> 32 33 #include "hci_debugfs.h" 34 #include "hci_codec.h" 35 #include "smp.h" 36 #include "msft.h" 37 #include "eir.h" 38 39 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \ 40 "\x00\x00\x00\x00\x00\x00\x00\x00" 41 42 /* Handle HCI Event packets */ 43 44 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, 45 u8 ev, size_t len) 46 { 47 void *data; 48 49 data = skb_pull_data(skb, len); 50 if (!data) 51 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev); 52 53 return data; 54 } 55 56 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, 57 u16 op, size_t len) 58 { 59 void *data; 60 61 data = skb_pull_data(skb, len); 62 if (!data) 63 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op); 64 65 return data; 66 } 67 68 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, 69 u8 ev, size_t len) 70 { 71 void *data; 72 73 data = skb_pull_data(skb, len); 74 if (!data) 75 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev); 76 77 return data; 78 } 79 80 static void hci_store_wake_reason(struct hci_dev *hdev, 81 const bdaddr_t *bdaddr, u8 addr_type) 82 __must_hold(&hdev->lock); 83 84 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data, 85 struct sk_buff *skb) 86 { 87 struct hci_ev_status *rp = data; 88 89 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 90 91 /* It is possible that we receive Inquiry Complete event right 92 * before we receive Inquiry Cancel Command Complete event, in 93 * which case the latter event should have status of Command 94 * Disallowed. This should not be treated as error, since 95 * we actually achieve what Inquiry Cancel wants to achieve, 96 * which is to end the last Inquiry session. 97 */ 98 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) { 99 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command"); 100 rp->status = 0x00; 101 } 102 103 if (rp->status) 104 return rp->status; 105 106 clear_bit(HCI_INQUIRY, &hdev->flags); 107 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */ 108 wake_up_bit(&hdev->flags, HCI_INQUIRY); 109 110 hci_dev_lock(hdev); 111 /* Set discovery state to stopped if we're not doing LE active 112 * scanning. 113 */ 114 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || 115 hdev->le_scan_type != LE_SCAN_ACTIVE) 116 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 117 hci_dev_unlock(hdev); 118 119 return rp->status; 120 } 121 122 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data, 123 struct sk_buff *skb) 124 { 125 struct hci_ev_status *rp = data; 126 127 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 128 129 if (rp->status) 130 return rp->status; 131 132 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ); 133 134 return rp->status; 135 } 136 137 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data, 138 struct sk_buff *skb) 139 { 140 struct hci_ev_status *rp = data; 141 142 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 143 144 if (rp->status) 145 return rp->status; 146 147 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); 148 149 return rp->status; 150 } 151 152 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data, 153 struct sk_buff *skb) 154 { 155 struct hci_rp_remote_name_req_cancel *rp = data; 156 157 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 158 159 return rp->status; 160 } 161 162 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data, 163 struct sk_buff *skb) 164 { 165 struct hci_rp_role_discovery *rp = data; 166 struct hci_conn *conn; 167 168 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 169 170 if (rp->status) 171 return rp->status; 172 173 hci_dev_lock(hdev); 174 175 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 176 if (conn) 177 conn->role = rp->role; 178 179 hci_dev_unlock(hdev); 180 181 return rp->status; 182 } 183 184 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data, 185 struct sk_buff *skb) 186 { 187 struct hci_rp_read_link_policy *rp = data; 188 struct hci_conn *conn; 189 190 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 191 192 if (rp->status) 193 return rp->status; 194 195 hci_dev_lock(hdev); 196 197 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 198 if (conn) 199 conn->link_policy = __le16_to_cpu(rp->policy); 200 201 hci_dev_unlock(hdev); 202 203 return rp->status; 204 } 205 206 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data, 207 struct sk_buff *skb) 208 { 209 struct hci_rp_write_link_policy *rp = data; 210 struct hci_conn *conn; 211 void *sent; 212 213 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 214 215 if (rp->status) 216 return rp->status; 217 218 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY); 219 if (!sent) 220 return rp->status; 221 222 hci_dev_lock(hdev); 223 224 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 225 if (conn) 226 conn->link_policy = get_unaligned_le16(sent + 2); 227 228 hci_dev_unlock(hdev); 229 230 return rp->status; 231 } 232 233 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data, 234 struct sk_buff *skb) 235 { 236 struct hci_rp_read_def_link_policy *rp = data; 237 238 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 239 240 if (rp->status) 241 return rp->status; 242 243 hdev->link_policy = __le16_to_cpu(rp->policy); 244 245 return rp->status; 246 } 247 248 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data, 249 struct sk_buff *skb) 250 { 251 struct hci_ev_status *rp = data; 252 void *sent; 253 254 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 255 256 if (rp->status) 257 return rp->status; 258 259 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY); 260 if (!sent) 261 return rp->status; 262 263 hdev->link_policy = get_unaligned_le16(sent); 264 265 return rp->status; 266 } 267 268 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb) 269 { 270 struct hci_ev_status *rp = data; 271 272 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 273 274 clear_bit(HCI_RESET, &hdev->flags); 275 276 if (rp->status) 277 return rp->status; 278 279 /* Reset all non-persistent flags */ 280 hci_dev_clear_volatile_flags(hdev); 281 282 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 283 284 hdev->inq_tx_power = HCI_TX_POWER_INVALID; 285 hdev->adv_tx_power = HCI_TX_POWER_INVALID; 286 287 memset(hdev->adv_data, 0, sizeof(hdev->adv_data)); 288 hdev->adv_data_len = 0; 289 290 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data)); 291 hdev->scan_rsp_data_len = 0; 292 293 hdev->le_scan_type = LE_SCAN_PASSIVE; 294 295 hdev->ssp_debug_mode = 0; 296 297 hci_bdaddr_list_clear(&hdev->le_accept_list); 298 hci_bdaddr_list_clear(&hdev->le_resolv_list); 299 300 return rp->status; 301 } 302 303 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data, 304 struct sk_buff *skb) 305 { 306 struct hci_rp_read_stored_link_key *rp = data; 307 struct hci_cp_read_stored_link_key *sent; 308 309 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 310 311 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY); 312 if (!sent) 313 return rp->status; 314 315 if (!rp->status && sent->read_all == 0x01) { 316 hdev->stored_max_keys = le16_to_cpu(rp->max_keys); 317 hdev->stored_num_keys = le16_to_cpu(rp->num_keys); 318 } 319 320 return rp->status; 321 } 322 323 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data, 324 struct sk_buff *skb) 325 { 326 struct hci_rp_delete_stored_link_key *rp = data; 327 u16 num_keys; 328 329 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 330 331 if (rp->status) 332 return rp->status; 333 334 num_keys = le16_to_cpu(rp->num_keys); 335 336 if (num_keys <= hdev->stored_num_keys) 337 hdev->stored_num_keys -= num_keys; 338 else 339 hdev->stored_num_keys = 0; 340 341 return rp->status; 342 } 343 344 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data, 345 struct sk_buff *skb) 346 { 347 struct hci_ev_status *rp = data; 348 void *sent; 349 350 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 351 352 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME); 353 if (!sent) 354 return rp->status; 355 356 hci_dev_lock(hdev); 357 358 if (hci_dev_test_flag(hdev, HCI_MGMT)) 359 mgmt_set_local_name_complete(hdev, sent, rp->status); 360 else if (!rp->status) 361 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH); 362 363 hci_dev_unlock(hdev); 364 365 return rp->status; 366 } 367 368 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data, 369 struct sk_buff *skb) 370 { 371 struct hci_rp_read_local_name *rp = data; 372 373 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 374 375 if (rp->status) 376 return rp->status; 377 378 if (hci_dev_test_flag(hdev, HCI_SETUP) || 379 hci_dev_test_flag(hdev, HCI_CONFIG)) 380 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH); 381 382 return rp->status; 383 } 384 385 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data, 386 struct sk_buff *skb) 387 { 388 struct hci_ev_status *rp = data; 389 void *sent; 390 391 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 392 393 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE); 394 if (!sent) 395 return rp->status; 396 397 hci_dev_lock(hdev); 398 399 if (!rp->status) { 400 __u8 param = *((__u8 *) sent); 401 402 if (param == AUTH_ENABLED) 403 set_bit(HCI_AUTH, &hdev->flags); 404 else 405 clear_bit(HCI_AUTH, &hdev->flags); 406 } 407 408 if (hci_dev_test_flag(hdev, HCI_MGMT)) 409 mgmt_auth_enable_complete(hdev, rp->status); 410 411 hci_dev_unlock(hdev); 412 413 return rp->status; 414 } 415 416 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data, 417 struct sk_buff *skb) 418 { 419 struct hci_ev_status *rp = data; 420 __u8 param; 421 void *sent; 422 423 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 424 425 if (rp->status) 426 return rp->status; 427 428 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE); 429 if (!sent) 430 return rp->status; 431 432 param = *((__u8 *) sent); 433 434 if (param) 435 set_bit(HCI_ENCRYPT, &hdev->flags); 436 else 437 clear_bit(HCI_ENCRYPT, &hdev->flags); 438 439 return rp->status; 440 } 441 442 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data, 443 struct sk_buff *skb) 444 { 445 struct hci_ev_status *rp = data; 446 __u8 param; 447 void *sent; 448 449 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 450 451 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE); 452 if (!sent) 453 return rp->status; 454 455 param = *((__u8 *) sent); 456 457 hci_dev_lock(hdev); 458 459 if (rp->status) { 460 hdev->discov_timeout = 0; 461 goto done; 462 } 463 464 if (param & SCAN_INQUIRY) 465 set_bit(HCI_ISCAN, &hdev->flags); 466 else 467 clear_bit(HCI_ISCAN, &hdev->flags); 468 469 if (param & SCAN_PAGE) 470 set_bit(HCI_PSCAN, &hdev->flags); 471 else 472 clear_bit(HCI_PSCAN, &hdev->flags); 473 474 done: 475 hci_dev_unlock(hdev); 476 477 return rp->status; 478 } 479 480 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data, 481 struct sk_buff *skb) 482 { 483 struct hci_ev_status *rp = data; 484 struct hci_cp_set_event_filter *cp; 485 void *sent; 486 487 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 488 489 if (rp->status) 490 return rp->status; 491 492 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT); 493 if (!sent) 494 return rp->status; 495 496 cp = (struct hci_cp_set_event_filter *)sent; 497 498 if (cp->flt_type == HCI_FLT_CLEAR_ALL) 499 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED); 500 else 501 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED); 502 503 return rp->status; 504 } 505 506 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data, 507 struct sk_buff *skb) 508 { 509 struct hci_rp_read_class_of_dev *rp = data; 510 511 if (WARN_ON(!hdev)) 512 return HCI_ERROR_UNSPECIFIED; 513 514 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 515 516 if (rp->status) 517 return rp->status; 518 519 memcpy(hdev->dev_class, rp->dev_class, 3); 520 521 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2], 522 hdev->dev_class[1], hdev->dev_class[0]); 523 524 return rp->status; 525 } 526 527 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data, 528 struct sk_buff *skb) 529 { 530 struct hci_ev_status *rp = data; 531 void *sent; 532 533 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 534 535 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV); 536 if (!sent) 537 return rp->status; 538 539 hci_dev_lock(hdev); 540 541 if (!rp->status) 542 memcpy(hdev->dev_class, sent, 3); 543 544 if (hci_dev_test_flag(hdev, HCI_MGMT)) 545 mgmt_set_class_of_dev_complete(hdev, sent, rp->status); 546 547 hci_dev_unlock(hdev); 548 549 return rp->status; 550 } 551 552 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data, 553 struct sk_buff *skb) 554 { 555 struct hci_rp_read_voice_setting *rp = data; 556 __u16 setting; 557 558 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 559 560 if (rp->status) 561 return rp->status; 562 563 setting = __le16_to_cpu(rp->voice_setting); 564 565 if (hdev->voice_setting == setting) 566 return rp->status; 567 568 hdev->voice_setting = setting; 569 570 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting); 571 572 if (hdev->notify) 573 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING); 574 575 return rp->status; 576 } 577 578 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data, 579 struct sk_buff *skb) 580 { 581 struct hci_ev_status *rp = data; 582 __u16 setting; 583 void *sent; 584 585 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 586 587 if (rp->status) 588 return rp->status; 589 590 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING); 591 if (!sent) 592 return rp->status; 593 594 setting = get_unaligned_le16(sent); 595 596 if (hdev->voice_setting == setting) 597 return rp->status; 598 599 hdev->voice_setting = setting; 600 601 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting); 602 603 if (hdev->notify) 604 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING); 605 606 return rp->status; 607 } 608 609 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data, 610 struct sk_buff *skb) 611 { 612 struct hci_rp_read_num_supported_iac *rp = data; 613 614 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 615 616 if (rp->status) 617 return rp->status; 618 619 hdev->num_iac = rp->num_iac; 620 621 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac); 622 623 return rp->status; 624 } 625 626 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data, 627 struct sk_buff *skb) 628 { 629 struct hci_ev_status *rp = data; 630 struct hci_cp_write_ssp_mode *sent; 631 632 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 633 634 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE); 635 if (!sent) 636 return rp->status; 637 638 hci_dev_lock(hdev); 639 640 if (!rp->status) { 641 if (sent->mode) 642 hdev->features[1][0] |= LMP_HOST_SSP; 643 else 644 hdev->features[1][0] &= ~LMP_HOST_SSP; 645 } 646 647 if (!rp->status) { 648 if (sent->mode) 649 hci_dev_set_flag(hdev, HCI_SSP_ENABLED); 650 else 651 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED); 652 } 653 654 hci_dev_unlock(hdev); 655 656 return rp->status; 657 } 658 659 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data, 660 struct sk_buff *skb) 661 { 662 struct hci_ev_status *rp = data; 663 struct hci_cp_write_sc_support *sent; 664 665 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 666 667 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT); 668 if (!sent) 669 return rp->status; 670 671 hci_dev_lock(hdev); 672 673 if (!rp->status) { 674 if (sent->support) 675 hdev->features[1][0] |= LMP_HOST_SC; 676 else 677 hdev->features[1][0] &= ~LMP_HOST_SC; 678 } 679 680 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) { 681 if (sent->support) 682 hci_dev_set_flag(hdev, HCI_SC_ENABLED); 683 else 684 hci_dev_clear_flag(hdev, HCI_SC_ENABLED); 685 } 686 687 hci_dev_unlock(hdev); 688 689 return rp->status; 690 } 691 692 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data, 693 struct sk_buff *skb) 694 { 695 struct hci_rp_read_local_version *rp = data; 696 697 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 698 699 if (rp->status) 700 return rp->status; 701 702 if (hci_dev_test_flag(hdev, HCI_SETUP) || 703 hci_dev_test_flag(hdev, HCI_CONFIG)) { 704 hdev->hci_ver = rp->hci_ver; 705 hdev->hci_rev = __le16_to_cpu(rp->hci_rev); 706 hdev->lmp_ver = rp->lmp_ver; 707 hdev->manufacturer = __le16_to_cpu(rp->manufacturer); 708 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver); 709 } 710 711 return rp->status; 712 } 713 714 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data, 715 struct sk_buff *skb) 716 { 717 struct hci_rp_read_enc_key_size *rp = data; 718 struct hci_conn *conn; 719 u16 handle; 720 u8 status = rp->status; 721 722 bt_dev_dbg(hdev, "status 0x%2.2x", status); 723 724 handle = le16_to_cpu(rp->handle); 725 726 hci_dev_lock(hdev); 727 728 conn = hci_conn_hash_lookup_handle(hdev, handle); 729 if (!conn) { 730 status = 0xFF; 731 goto done; 732 } 733 734 /* While unexpected, the read_enc_key_size command may fail. The most 735 * secure approach is to then assume the key size is 0 to force a 736 * disconnection. 737 */ 738 if (status) { 739 bt_dev_err(hdev, "failed to read key size for handle %u", 740 handle); 741 conn->enc_key_size = 0; 742 } else { 743 u8 *key_enc_size = hci_conn_key_enc_size(conn); 744 745 conn->enc_key_size = rp->key_size; 746 status = 0; 747 748 /* Attempt to check if the key size is too small or if it has 749 * been downgraded from the last time it was stored as part of 750 * the link_key. 751 */ 752 if (conn->enc_key_size < hdev->min_enc_key_size || 753 (key_enc_size && conn->enc_key_size < *key_enc_size)) { 754 /* As slave role, the conn->state has been set to 755 * BT_CONNECTED and l2cap conn req might not be received 756 * yet, at this moment the l2cap layer almost does 757 * nothing with the non-zero status. 758 * So we also clear encrypt related bits, and then the 759 * handler of l2cap conn req will get the right secure 760 * state at a later time. 761 */ 762 status = HCI_ERROR_AUTH_FAILURE; 763 clear_bit(HCI_CONN_ENCRYPT, &conn->flags); 764 clear_bit(HCI_CONN_AES_CCM, &conn->flags); 765 } 766 767 /* Update the key encryption size with the connection one */ 768 if (key_enc_size && *key_enc_size != conn->enc_key_size) 769 *key_enc_size = conn->enc_key_size; 770 } 771 772 hci_encrypt_cfm(conn, status); 773 774 done: 775 hci_dev_unlock(hdev); 776 777 return status; 778 } 779 780 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data, 781 struct sk_buff *skb) 782 { 783 struct hci_rp_read_local_commands *rp = data; 784 785 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 786 787 if (rp->status) 788 return rp->status; 789 790 if (hci_dev_test_flag(hdev, HCI_SETUP) || 791 hci_dev_test_flag(hdev, HCI_CONFIG)) 792 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands)); 793 794 return rp->status; 795 } 796 797 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data, 798 struct sk_buff *skb) 799 { 800 struct hci_rp_read_auth_payload_to *rp = data; 801 struct hci_conn *conn; 802 803 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 804 805 if (rp->status) 806 return rp->status; 807 808 hci_dev_lock(hdev); 809 810 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 811 if (conn) 812 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout); 813 814 hci_dev_unlock(hdev); 815 816 return rp->status; 817 } 818 819 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data, 820 struct sk_buff *skb) 821 { 822 struct hci_rp_write_auth_payload_to *rp = data; 823 struct hci_conn *conn; 824 void *sent; 825 826 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 827 828 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO); 829 if (!sent) 830 return rp->status; 831 832 hci_dev_lock(hdev); 833 834 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 835 if (!conn) { 836 rp->status = 0xff; 837 goto unlock; 838 } 839 840 if (!rp->status) 841 conn->auth_payload_timeout = get_unaligned_le16(sent + 2); 842 843 unlock: 844 hci_dev_unlock(hdev); 845 846 return rp->status; 847 } 848 849 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data, 850 struct sk_buff *skb) 851 { 852 struct hci_rp_read_local_features *rp = data; 853 854 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 855 856 if (rp->status) 857 return rp->status; 858 859 memcpy(hdev->features, rp->features, 8); 860 861 /* Adjust default settings according to features 862 * supported by device. */ 863 864 if (hdev->features[0][0] & LMP_3SLOT) 865 hdev->pkt_type |= (HCI_DM3 | HCI_DH3); 866 867 if (hdev->features[0][0] & LMP_5SLOT) 868 hdev->pkt_type |= (HCI_DM5 | HCI_DH5); 869 870 if (hdev->features[0][1] & LMP_HV2) { 871 hdev->pkt_type |= (HCI_HV2); 872 hdev->esco_type |= (ESCO_HV2); 873 } 874 875 if (hdev->features[0][1] & LMP_HV3) { 876 hdev->pkt_type |= (HCI_HV3); 877 hdev->esco_type |= (ESCO_HV3); 878 } 879 880 if (lmp_esco_capable(hdev)) 881 hdev->esco_type |= (ESCO_EV3); 882 883 if (hdev->features[0][4] & LMP_EV4) 884 hdev->esco_type |= (ESCO_EV4); 885 886 if (hdev->features[0][4] & LMP_EV5) 887 hdev->esco_type |= (ESCO_EV5); 888 889 if (hdev->features[0][5] & LMP_EDR_ESCO_2M) 890 hdev->esco_type |= (ESCO_2EV3); 891 892 if (hdev->features[0][5] & LMP_EDR_ESCO_3M) 893 hdev->esco_type |= (ESCO_3EV3); 894 895 if (hdev->features[0][5] & LMP_EDR_3S_ESCO) 896 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5); 897 898 return rp->status; 899 } 900 901 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data, 902 struct sk_buff *skb) 903 { 904 struct hci_rp_read_local_ext_features *rp = data; 905 906 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 907 908 if (rp->status) 909 return rp->status; 910 911 if (hdev->max_page < rp->max_page) { 912 if (hci_test_quirk(hdev, 913 HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2)) 914 bt_dev_warn(hdev, "broken local ext features page 2"); 915 else 916 hdev->max_page = rp->max_page; 917 } 918 919 if (rp->page < HCI_MAX_PAGES) 920 memcpy(hdev->features[rp->page], rp->features, 8); 921 922 return rp->status; 923 } 924 925 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data, 926 struct sk_buff *skb) 927 { 928 struct hci_rp_read_buffer_size *rp = data; 929 930 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 931 932 if (rp->status) 933 return rp->status; 934 935 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu); 936 hdev->sco_mtu = rp->sco_mtu; 937 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt); 938 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt); 939 940 if (hci_test_quirk(hdev, HCI_QUIRK_FIXUP_BUFFER_SIZE)) { 941 hdev->sco_mtu = 64; 942 hdev->sco_pkts = 8; 943 } 944 945 if (!read_voice_setting_capable(hdev)) 946 hdev->sco_pkts = 0; 947 948 hdev->acl_cnt = hdev->acl_pkts; 949 hdev->sco_cnt = hdev->sco_pkts; 950 951 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu, 952 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts); 953 954 if (!hdev->acl_mtu || !hdev->acl_pkts) 955 return HCI_ERROR_INVALID_PARAMETERS; 956 957 return rp->status; 958 } 959 960 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data, 961 struct sk_buff *skb) 962 { 963 struct hci_rp_read_bd_addr *rp = data; 964 965 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 966 967 if (rp->status) 968 return rp->status; 969 970 if (test_bit(HCI_INIT, &hdev->flags)) 971 bacpy(&hdev->bdaddr, &rp->bdaddr); 972 973 if (hci_dev_test_flag(hdev, HCI_SETUP)) 974 bacpy(&hdev->setup_addr, &rp->bdaddr); 975 976 return rp->status; 977 } 978 979 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data, 980 struct sk_buff *skb) 981 { 982 struct hci_rp_read_local_pairing_opts *rp = data; 983 984 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 985 986 if (rp->status) 987 return rp->status; 988 989 if (hci_dev_test_flag(hdev, HCI_SETUP) || 990 hci_dev_test_flag(hdev, HCI_CONFIG)) { 991 hdev->pairing_opts = rp->pairing_opts; 992 hdev->max_enc_key_size = rp->max_key_size; 993 } 994 995 return rp->status; 996 } 997 998 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data, 999 struct sk_buff *skb) 1000 { 1001 struct hci_rp_read_page_scan_activity *rp = data; 1002 1003 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1004 1005 if (rp->status) 1006 return rp->status; 1007 1008 if (test_bit(HCI_INIT, &hdev->flags)) { 1009 hdev->page_scan_interval = __le16_to_cpu(rp->interval); 1010 hdev->page_scan_window = __le16_to_cpu(rp->window); 1011 } 1012 1013 return rp->status; 1014 } 1015 1016 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data, 1017 struct sk_buff *skb) 1018 { 1019 struct hci_ev_status *rp = data; 1020 struct hci_cp_write_page_scan_activity *sent; 1021 1022 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1023 1024 if (rp->status) 1025 return rp->status; 1026 1027 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY); 1028 if (!sent) 1029 return rp->status; 1030 1031 hdev->page_scan_interval = __le16_to_cpu(sent->interval); 1032 hdev->page_scan_window = __le16_to_cpu(sent->window); 1033 1034 return rp->status; 1035 } 1036 1037 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data, 1038 struct sk_buff *skb) 1039 { 1040 struct hci_rp_read_page_scan_type *rp = data; 1041 1042 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1043 1044 if (rp->status) 1045 return rp->status; 1046 1047 if (test_bit(HCI_INIT, &hdev->flags)) 1048 hdev->page_scan_type = rp->type; 1049 1050 return rp->status; 1051 } 1052 1053 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data, 1054 struct sk_buff *skb) 1055 { 1056 struct hci_ev_status *rp = data; 1057 u8 *type; 1058 1059 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1060 1061 if (rp->status) 1062 return rp->status; 1063 1064 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE); 1065 if (type) 1066 hdev->page_scan_type = *type; 1067 1068 return rp->status; 1069 } 1070 1071 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data, 1072 struct sk_buff *skb) 1073 { 1074 struct hci_rp_read_clock *rp = data; 1075 struct hci_cp_read_clock *cp; 1076 struct hci_conn *conn; 1077 1078 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1079 1080 if (rp->status) 1081 return rp->status; 1082 1083 hci_dev_lock(hdev); 1084 1085 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK); 1086 if (!cp) 1087 goto unlock; 1088 1089 if (cp->which == 0x00) { 1090 hdev->clock = le32_to_cpu(rp->clock); 1091 goto unlock; 1092 } 1093 1094 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 1095 if (conn) { 1096 conn->clock = le32_to_cpu(rp->clock); 1097 conn->clock_accuracy = le16_to_cpu(rp->accuracy); 1098 } 1099 1100 unlock: 1101 hci_dev_unlock(hdev); 1102 return rp->status; 1103 } 1104 1105 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data, 1106 struct sk_buff *skb) 1107 { 1108 struct hci_rp_read_inq_rsp_tx_power *rp = data; 1109 1110 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1111 1112 if (rp->status) 1113 return rp->status; 1114 1115 hdev->inq_tx_power = rp->tx_power; 1116 1117 return rp->status; 1118 } 1119 1120 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data, 1121 struct sk_buff *skb) 1122 { 1123 struct hci_rp_read_def_err_data_reporting *rp = data; 1124 1125 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1126 1127 if (rp->status) 1128 return rp->status; 1129 1130 hdev->err_data_reporting = rp->err_data_reporting; 1131 1132 return rp->status; 1133 } 1134 1135 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data, 1136 struct sk_buff *skb) 1137 { 1138 struct hci_ev_status *rp = data; 1139 struct hci_cp_write_def_err_data_reporting *cp; 1140 1141 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1142 1143 if (rp->status) 1144 return rp->status; 1145 1146 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING); 1147 if (!cp) 1148 return rp->status; 1149 1150 hdev->err_data_reporting = cp->err_data_reporting; 1151 1152 return rp->status; 1153 } 1154 1155 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data, 1156 struct sk_buff *skb) 1157 { 1158 struct hci_rp_pin_code_reply *rp = data; 1159 struct hci_cp_pin_code_reply *cp; 1160 struct hci_conn *conn; 1161 1162 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1163 1164 hci_dev_lock(hdev); 1165 1166 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1167 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status); 1168 1169 if (rp->status) 1170 goto unlock; 1171 1172 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY); 1173 if (!cp) 1174 goto unlock; 1175 1176 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 1177 if (conn) 1178 conn->pin_length = cp->pin_len; 1179 1180 unlock: 1181 hci_dev_unlock(hdev); 1182 return rp->status; 1183 } 1184 1185 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data, 1186 struct sk_buff *skb) 1187 { 1188 struct hci_rp_pin_code_neg_reply *rp = data; 1189 1190 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1191 1192 hci_dev_lock(hdev); 1193 1194 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1195 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr, 1196 rp->status); 1197 1198 hci_dev_unlock(hdev); 1199 1200 return rp->status; 1201 } 1202 1203 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data, 1204 struct sk_buff *skb) 1205 { 1206 struct hci_rp_le_read_buffer_size *rp = data; 1207 1208 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1209 1210 if (rp->status) 1211 return rp->status; 1212 1213 hdev->le_mtu = __le16_to_cpu(rp->le_mtu); 1214 hdev->le_pkts = rp->le_max_pkt; 1215 1216 hdev->le_cnt = hdev->le_pkts; 1217 1218 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts); 1219 1220 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU) 1221 return HCI_ERROR_INVALID_PARAMETERS; 1222 1223 return rp->status; 1224 } 1225 1226 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data, 1227 struct sk_buff *skb) 1228 { 1229 struct hci_rp_le_read_local_features *rp = data; 1230 1231 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status); 1232 1233 if (rp->status) 1234 return rp->status; 1235 1236 memcpy(hdev->le_features, rp->features, 8); 1237 1238 return rp->status; 1239 } 1240 1241 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data, 1242 struct sk_buff *skb) 1243 { 1244 struct hci_rp_le_read_adv_tx_power *rp = data; 1245 1246 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1247 1248 if (rp->status) 1249 return rp->status; 1250 1251 hdev->adv_tx_power = rp->tx_power; 1252 1253 return rp->status; 1254 } 1255 1256 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data, 1257 struct sk_buff *skb) 1258 { 1259 struct hci_rp_user_confirm_reply *rp = data; 1260 1261 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1262 1263 hci_dev_lock(hdev); 1264 1265 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1266 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0, 1267 rp->status); 1268 1269 hci_dev_unlock(hdev); 1270 1271 return rp->status; 1272 } 1273 1274 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data, 1275 struct sk_buff *skb) 1276 { 1277 struct hci_rp_user_confirm_reply *rp = data; 1278 1279 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1280 1281 hci_dev_lock(hdev); 1282 1283 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1284 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr, 1285 ACL_LINK, 0, rp->status); 1286 1287 hci_dev_unlock(hdev); 1288 1289 return rp->status; 1290 } 1291 1292 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data, 1293 struct sk_buff *skb) 1294 { 1295 struct hci_rp_user_confirm_reply *rp = data; 1296 1297 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1298 1299 hci_dev_lock(hdev); 1300 1301 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1302 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 1303 0, rp->status); 1304 1305 hci_dev_unlock(hdev); 1306 1307 return rp->status; 1308 } 1309 1310 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data, 1311 struct sk_buff *skb) 1312 { 1313 struct hci_rp_user_confirm_reply *rp = data; 1314 1315 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1316 1317 hci_dev_lock(hdev); 1318 1319 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1320 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr, 1321 ACL_LINK, 0, rp->status); 1322 1323 hci_dev_unlock(hdev); 1324 1325 return rp->status; 1326 } 1327 1328 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data, 1329 struct sk_buff *skb) 1330 { 1331 struct hci_rp_read_local_oob_data *rp = data; 1332 1333 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1334 1335 return rp->status; 1336 } 1337 1338 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data, 1339 struct sk_buff *skb) 1340 { 1341 struct hci_rp_read_local_oob_ext_data *rp = data; 1342 1343 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1344 1345 return rp->status; 1346 } 1347 1348 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data, 1349 struct sk_buff *skb) 1350 { 1351 struct hci_ev_status *rp = data; 1352 bdaddr_t *sent; 1353 1354 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1355 1356 if (rp->status) 1357 return rp->status; 1358 1359 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR); 1360 if (!sent) 1361 return rp->status; 1362 1363 hci_dev_lock(hdev); 1364 1365 bacpy(&hdev->random_addr, sent); 1366 1367 if (!bacmp(&hdev->rpa, sent)) { 1368 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED); 1369 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, 1370 secs_to_jiffies(hdev->rpa_timeout)); 1371 } 1372 1373 hci_dev_unlock(hdev); 1374 1375 return rp->status; 1376 } 1377 1378 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data, 1379 struct sk_buff *skb) 1380 { 1381 struct hci_ev_status *rp = data; 1382 struct hci_cp_le_set_default_phy *cp; 1383 1384 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1385 1386 if (rp->status) 1387 return rp->status; 1388 1389 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY); 1390 if (!cp) 1391 return rp->status; 1392 1393 hci_dev_lock(hdev); 1394 1395 hdev->le_tx_def_phys = cp->tx_phys; 1396 hdev->le_rx_def_phys = cp->rx_phys; 1397 1398 hci_dev_unlock(hdev); 1399 1400 return rp->status; 1401 } 1402 1403 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data, 1404 struct sk_buff *skb) 1405 { 1406 struct hci_ev_status *rp = data; 1407 struct hci_cp_le_set_adv_set_rand_addr *cp; 1408 struct adv_info *adv; 1409 1410 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1411 1412 if (rp->status) 1413 return rp->status; 1414 1415 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR); 1416 /* Update only in case the adv instance since handle 0x00 shall be using 1417 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and 1418 * non-extended adverting. 1419 */ 1420 if (!cp || !cp->handle) 1421 return rp->status; 1422 1423 hci_dev_lock(hdev); 1424 1425 adv = hci_find_adv_instance(hdev, cp->handle); 1426 if (adv) { 1427 bacpy(&adv->random_addr, &cp->bdaddr); 1428 if (!bacmp(&hdev->rpa, &cp->bdaddr)) { 1429 adv->rpa_expired = false; 1430 queue_delayed_work(hdev->workqueue, 1431 &adv->rpa_expired_cb, 1432 secs_to_jiffies(hdev->rpa_timeout)); 1433 } 1434 } 1435 1436 hci_dev_unlock(hdev); 1437 1438 return rp->status; 1439 } 1440 1441 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data, 1442 struct sk_buff *skb) 1443 { 1444 struct hci_ev_status *rp = data; 1445 u8 *instance; 1446 int err; 1447 1448 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1449 1450 if (rp->status) 1451 return rp->status; 1452 1453 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET); 1454 if (!instance) 1455 return rp->status; 1456 1457 hci_dev_lock(hdev); 1458 1459 err = hci_remove_adv_instance(hdev, *instance); 1460 if (!err) 1461 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev, 1462 *instance); 1463 1464 hci_dev_unlock(hdev); 1465 1466 return rp->status; 1467 } 1468 1469 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data, 1470 struct sk_buff *skb) 1471 { 1472 struct hci_ev_status *rp = data; 1473 struct adv_info *adv, *n; 1474 int err; 1475 1476 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1477 1478 if (rp->status) 1479 return rp->status; 1480 1481 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS)) 1482 return rp->status; 1483 1484 hci_dev_lock(hdev); 1485 1486 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { 1487 u8 instance = adv->instance; 1488 1489 err = hci_remove_adv_instance(hdev, instance); 1490 if (!err) 1491 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), 1492 hdev, instance); 1493 } 1494 1495 hci_dev_unlock(hdev); 1496 1497 return rp->status; 1498 } 1499 1500 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data, 1501 struct sk_buff *skb) 1502 { 1503 struct hci_rp_le_read_transmit_power *rp = data; 1504 1505 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1506 1507 if (rp->status) 1508 return rp->status; 1509 1510 hdev->min_le_tx_power = rp->min_le_tx_power; 1511 hdev->max_le_tx_power = rp->max_le_tx_power; 1512 1513 return rp->status; 1514 } 1515 1516 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data, 1517 struct sk_buff *skb) 1518 { 1519 struct hci_ev_status *rp = data; 1520 struct hci_cp_le_set_privacy_mode *cp; 1521 struct hci_conn_params *params; 1522 1523 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1524 1525 if (rp->status) 1526 return rp->status; 1527 1528 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE); 1529 if (!cp) 1530 return rp->status; 1531 1532 hci_dev_lock(hdev); 1533 1534 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type); 1535 if (params) 1536 WRITE_ONCE(params->privacy_mode, cp->mode); 1537 1538 hci_dev_unlock(hdev); 1539 1540 return rp->status; 1541 } 1542 1543 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data, 1544 struct sk_buff *skb) 1545 { 1546 struct hci_ev_status *rp = data; 1547 __u8 *sent; 1548 1549 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1550 1551 if (rp->status) 1552 return rp->status; 1553 1554 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE); 1555 if (!sent) 1556 return rp->status; 1557 1558 hci_dev_lock(hdev); 1559 1560 /* If we're doing connection initiation as peripheral. Set a 1561 * timeout in case something goes wrong. 1562 */ 1563 if (*sent) { 1564 struct hci_conn *conn; 1565 1566 hci_dev_set_flag(hdev, HCI_LE_ADV); 1567 1568 conn = hci_lookup_le_connect(hdev); 1569 if (conn) 1570 queue_delayed_work(hdev->workqueue, 1571 &conn->le_conn_timeout, 1572 conn->conn_timeout); 1573 } else { 1574 hci_dev_clear_flag(hdev, HCI_LE_ADV); 1575 } 1576 1577 hci_dev_unlock(hdev); 1578 1579 return rp->status; 1580 } 1581 1582 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data, 1583 struct sk_buff *skb) 1584 { 1585 struct hci_cp_le_set_ext_adv_enable *cp; 1586 struct hci_cp_ext_adv_set *set; 1587 struct adv_info *adv = NULL, *n; 1588 struct hci_ev_status *rp = data; 1589 1590 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1591 1592 if (rp->status) 1593 return rp->status; 1594 1595 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE); 1596 if (!cp) 1597 return rp->status; 1598 1599 set = (void *)cp->data; 1600 1601 hci_dev_lock(hdev); 1602 1603 if (cp->num_of_sets) 1604 adv = hci_find_adv_instance(hdev, set->handle); 1605 1606 if (cp->enable) { 1607 struct hci_conn *conn; 1608 1609 hci_dev_set_flag(hdev, HCI_LE_ADV); 1610 1611 if (adv) 1612 adv->enabled = true; 1613 else if (!set->handle) 1614 hci_dev_set_flag(hdev, HCI_LE_ADV_0); 1615 1616 conn = hci_lookup_le_connect(hdev); 1617 if (conn) 1618 queue_delayed_work(hdev->workqueue, 1619 &conn->le_conn_timeout, 1620 conn->conn_timeout); 1621 } else { 1622 if (cp->num_of_sets) { 1623 if (adv) 1624 adv->enabled = false; 1625 else if (!set->handle) 1626 hci_dev_clear_flag(hdev, HCI_LE_ADV_0); 1627 1628 /* If just one instance was disabled check if there are 1629 * any other instance enabled before clearing HCI_LE_ADV 1630 */ 1631 list_for_each_entry_safe(adv, n, &hdev->adv_instances, 1632 list) { 1633 if (adv->enabled) 1634 goto unlock; 1635 } 1636 } else { 1637 /* All instances shall be considered disabled */ 1638 list_for_each_entry_safe(adv, n, &hdev->adv_instances, 1639 list) 1640 adv->enabled = false; 1641 } 1642 1643 hci_dev_clear_flag(hdev, HCI_LE_ADV); 1644 } 1645 1646 unlock: 1647 hci_dev_unlock(hdev); 1648 return rp->status; 1649 } 1650 1651 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data, 1652 struct sk_buff *skb) 1653 { 1654 struct hci_cp_le_set_scan_param *cp; 1655 struct hci_ev_status *rp = data; 1656 1657 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1658 1659 if (rp->status) 1660 return rp->status; 1661 1662 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM); 1663 if (!cp) 1664 return rp->status; 1665 1666 hci_dev_lock(hdev); 1667 1668 hdev->le_scan_type = cp->type; 1669 1670 hci_dev_unlock(hdev); 1671 1672 return rp->status; 1673 } 1674 1675 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data, 1676 struct sk_buff *skb) 1677 { 1678 struct hci_cp_le_set_ext_scan_params *cp; 1679 struct hci_ev_status *rp = data; 1680 struct hci_cp_le_scan_phy_params *phy_param; 1681 1682 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1683 1684 if (rp->status) 1685 return rp->status; 1686 1687 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS); 1688 if (!cp) 1689 return rp->status; 1690 1691 phy_param = (void *)cp->data; 1692 1693 hci_dev_lock(hdev); 1694 1695 hdev->le_scan_type = phy_param->type; 1696 1697 hci_dev_unlock(hdev); 1698 1699 return rp->status; 1700 } 1701 1702 static bool has_pending_adv_report(struct hci_dev *hdev) 1703 { 1704 struct discovery_state *d = &hdev->discovery; 1705 1706 return bacmp(&d->last_adv_addr, BDADDR_ANY); 1707 } 1708 1709 static void clear_pending_adv_report(struct hci_dev *hdev) 1710 { 1711 struct discovery_state *d = &hdev->discovery; 1712 1713 bacpy(&d->last_adv_addr, BDADDR_ANY); 1714 d->last_adv_data_len = 0; 1715 } 1716 1717 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr, 1718 u8 bdaddr_type, s8 rssi, u32 flags, 1719 u8 *data, u8 len) 1720 { 1721 struct discovery_state *d = &hdev->discovery; 1722 1723 if (len > max_adv_len(hdev)) 1724 return; 1725 1726 bacpy(&d->last_adv_addr, bdaddr); 1727 d->last_adv_addr_type = bdaddr_type; 1728 d->last_adv_rssi = rssi; 1729 d->last_adv_flags = flags; 1730 memcpy(d->last_adv_data, data, len); 1731 d->last_adv_data_len = len; 1732 } 1733 1734 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable) 1735 { 1736 hci_dev_lock(hdev); 1737 1738 switch (enable) { 1739 case LE_SCAN_ENABLE: 1740 hci_dev_set_flag(hdev, HCI_LE_SCAN); 1741 if (hdev->le_scan_type == LE_SCAN_ACTIVE) { 1742 clear_pending_adv_report(hdev); 1743 hci_discovery_set_state(hdev, DISCOVERY_FINDING); 1744 } 1745 break; 1746 1747 case LE_SCAN_DISABLE: 1748 /* We do this here instead of when setting DISCOVERY_STOPPED 1749 * since the latter would potentially require waiting for 1750 * inquiry to stop too. 1751 */ 1752 if (has_pending_adv_report(hdev)) { 1753 struct discovery_state *d = &hdev->discovery; 1754 1755 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, 1756 d->last_adv_addr_type, NULL, 1757 d->last_adv_rssi, d->last_adv_flags, 1758 d->last_adv_data, 1759 d->last_adv_data_len, NULL, 0, 0); 1760 } 1761 1762 /* Cancel this timer so that we don't try to disable scanning 1763 * when it's already disabled. 1764 */ 1765 cancel_delayed_work(&hdev->le_scan_disable); 1766 1767 hci_dev_clear_flag(hdev, HCI_LE_SCAN); 1768 1769 if (hdev->discovery.type == DISCOV_TYPE_INTERLEAVED && 1770 hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY) && 1771 !test_bit(HCI_INQUIRY, &hdev->flags) && 1772 hdev->discovery.state == DISCOVERY_FINDING) { 1773 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 1774 } 1775 1776 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we 1777 * interrupted scanning due to a connect request. Mark 1778 * therefore discovery as stopped. 1779 */ 1780 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED)) 1781 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 1782 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) && 1783 hdev->discovery.state == DISCOVERY_FINDING) 1784 queue_work(hdev->workqueue, &hdev->reenable_adv_work); 1785 1786 break; 1787 1788 default: 1789 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d", 1790 enable); 1791 break; 1792 } 1793 1794 hci_dev_unlock(hdev); 1795 } 1796 1797 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data, 1798 struct sk_buff *skb) 1799 { 1800 struct hci_cp_le_set_scan_enable *cp; 1801 struct hci_ev_status *rp = data; 1802 1803 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1804 1805 if (rp->status) 1806 return rp->status; 1807 1808 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE); 1809 if (!cp) 1810 return rp->status; 1811 1812 le_set_scan_enable_complete(hdev, cp->enable); 1813 1814 return rp->status; 1815 } 1816 1817 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data, 1818 struct sk_buff *skb) 1819 { 1820 struct hci_cp_le_set_ext_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_EXT_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_read_num_adv_sets(struct hci_dev *hdev, void *data, 1838 struct sk_buff *skb) 1839 { 1840 struct hci_rp_le_read_num_supported_adv_sets *rp = data; 1841 1842 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status, 1843 rp->num_of_sets); 1844 1845 if (rp->status) 1846 return rp->status; 1847 1848 hdev->le_num_of_adv_sets = rp->num_of_sets; 1849 1850 return rp->status; 1851 } 1852 1853 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data, 1854 struct sk_buff *skb) 1855 { 1856 struct hci_rp_le_read_accept_list_size *rp = data; 1857 1858 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size); 1859 1860 if (rp->status) 1861 return rp->status; 1862 1863 hdev->le_accept_list_size = rp->size; 1864 1865 return rp->status; 1866 } 1867 1868 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data, 1869 struct sk_buff *skb) 1870 { 1871 struct hci_ev_status *rp = data; 1872 1873 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1874 1875 if (rp->status) 1876 return rp->status; 1877 1878 hci_dev_lock(hdev); 1879 hci_bdaddr_list_clear(&hdev->le_accept_list); 1880 hci_dev_unlock(hdev); 1881 1882 return rp->status; 1883 } 1884 1885 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data, 1886 struct sk_buff *skb) 1887 { 1888 struct hci_cp_le_add_to_accept_list *sent; 1889 struct hci_ev_status *rp = data; 1890 1891 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1892 1893 if (rp->status) 1894 return rp->status; 1895 1896 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST); 1897 if (!sent) 1898 return rp->status; 1899 1900 hci_dev_lock(hdev); 1901 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr, 1902 sent->bdaddr_type); 1903 hci_dev_unlock(hdev); 1904 1905 return rp->status; 1906 } 1907 1908 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data, 1909 struct sk_buff *skb) 1910 { 1911 struct hci_cp_le_del_from_accept_list *sent; 1912 struct hci_ev_status *rp = data; 1913 1914 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1915 1916 if (rp->status) 1917 return rp->status; 1918 1919 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST); 1920 if (!sent) 1921 return rp->status; 1922 1923 hci_dev_lock(hdev); 1924 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr, 1925 sent->bdaddr_type); 1926 hci_dev_unlock(hdev); 1927 1928 return rp->status; 1929 } 1930 1931 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data, 1932 struct sk_buff *skb) 1933 { 1934 struct hci_rp_le_read_supported_states *rp = data; 1935 1936 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1937 1938 if (rp->status) 1939 return rp->status; 1940 1941 memcpy(hdev->le_states, rp->le_states, 8); 1942 1943 return rp->status; 1944 } 1945 1946 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data, 1947 struct sk_buff *skb) 1948 { 1949 struct hci_rp_le_read_def_data_len *rp = data; 1950 1951 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1952 1953 if (rp->status) 1954 return rp->status; 1955 1956 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len); 1957 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time); 1958 1959 return rp->status; 1960 } 1961 1962 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data, 1963 struct sk_buff *skb) 1964 { 1965 struct hci_cp_le_write_def_data_len *sent; 1966 struct hci_ev_status *rp = data; 1967 1968 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1969 1970 if (rp->status) 1971 return rp->status; 1972 1973 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN); 1974 if (!sent) 1975 return rp->status; 1976 1977 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len); 1978 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time); 1979 1980 return rp->status; 1981 } 1982 1983 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data, 1984 struct sk_buff *skb) 1985 { 1986 struct hci_cp_le_add_to_resolv_list *sent; 1987 struct hci_ev_status *rp = data; 1988 1989 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1990 1991 if (rp->status) 1992 return rp->status; 1993 1994 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST); 1995 if (!sent) 1996 return rp->status; 1997 1998 hci_dev_lock(hdev); 1999 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr, 2000 sent->bdaddr_type, sent->peer_irk, 2001 sent->local_irk); 2002 hci_dev_unlock(hdev); 2003 2004 return rp->status; 2005 } 2006 2007 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data, 2008 struct sk_buff *skb) 2009 { 2010 struct hci_cp_le_del_from_resolv_list *sent; 2011 struct hci_ev_status *rp = data; 2012 2013 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2014 2015 if (rp->status) 2016 return rp->status; 2017 2018 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST); 2019 if (!sent) 2020 return rp->status; 2021 2022 hci_dev_lock(hdev); 2023 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr, 2024 sent->bdaddr_type); 2025 hci_dev_unlock(hdev); 2026 2027 return rp->status; 2028 } 2029 2030 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data, 2031 struct sk_buff *skb) 2032 { 2033 struct hci_ev_status *rp = data; 2034 2035 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2036 2037 if (rp->status) 2038 return rp->status; 2039 2040 hci_dev_lock(hdev); 2041 hci_bdaddr_list_clear(&hdev->le_resolv_list); 2042 hci_dev_unlock(hdev); 2043 2044 return rp->status; 2045 } 2046 2047 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data, 2048 struct sk_buff *skb) 2049 { 2050 struct hci_rp_le_read_resolv_list_size *rp = data; 2051 2052 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size); 2053 2054 if (rp->status) 2055 return rp->status; 2056 2057 hdev->le_resolv_list_size = rp->size; 2058 2059 return rp->status; 2060 } 2061 2062 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data, 2063 struct sk_buff *skb) 2064 { 2065 struct hci_ev_status *rp = data; 2066 __u8 *sent; 2067 2068 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2069 2070 if (rp->status) 2071 return rp->status; 2072 2073 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE); 2074 if (!sent) 2075 return rp->status; 2076 2077 hci_dev_lock(hdev); 2078 2079 if (*sent) 2080 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION); 2081 else 2082 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION); 2083 2084 hci_dev_unlock(hdev); 2085 2086 return rp->status; 2087 } 2088 2089 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data, 2090 struct sk_buff *skb) 2091 { 2092 struct hci_rp_le_read_max_data_len *rp = data; 2093 2094 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2095 2096 if (rp->status) 2097 return rp->status; 2098 2099 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len); 2100 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time); 2101 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len); 2102 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time); 2103 2104 return rp->status; 2105 } 2106 2107 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data, 2108 struct sk_buff *skb) 2109 { 2110 struct hci_cp_write_le_host_supported *sent; 2111 struct hci_ev_status *rp = data; 2112 2113 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2114 2115 if (rp->status) 2116 return rp->status; 2117 2118 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED); 2119 if (!sent) 2120 return rp->status; 2121 2122 hci_dev_lock(hdev); 2123 2124 if (sent->le) { 2125 hdev->features[1][0] |= LMP_HOST_LE; 2126 hci_dev_set_flag(hdev, HCI_LE_ENABLED); 2127 } else { 2128 hdev->features[1][0] &= ~LMP_HOST_LE; 2129 hci_dev_clear_flag(hdev, HCI_LE_ENABLED); 2130 hci_dev_clear_flag(hdev, HCI_ADVERTISING); 2131 } 2132 2133 if (sent->simul) 2134 hdev->features[1][0] |= LMP_HOST_LE_BREDR; 2135 else 2136 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR; 2137 2138 hci_dev_unlock(hdev); 2139 2140 return rp->status; 2141 } 2142 2143 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data, 2144 struct sk_buff *skb) 2145 { 2146 struct hci_cp_le_set_adv_param *cp; 2147 struct hci_ev_status *rp = data; 2148 2149 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2150 2151 if (rp->status) 2152 return rp->status; 2153 2154 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM); 2155 if (!cp) 2156 return rp->status; 2157 2158 hci_dev_lock(hdev); 2159 hdev->adv_addr_type = cp->own_address_type; 2160 hci_dev_unlock(hdev); 2161 2162 return rp->status; 2163 } 2164 2165 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data, 2166 struct sk_buff *skb) 2167 { 2168 struct hci_rp_read_rssi *rp = data; 2169 struct hci_conn *conn; 2170 2171 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2172 2173 if (rp->status) 2174 return rp->status; 2175 2176 hci_dev_lock(hdev); 2177 2178 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 2179 if (conn) 2180 conn->rssi = rp->rssi; 2181 2182 hci_dev_unlock(hdev); 2183 2184 return rp->status; 2185 } 2186 2187 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data, 2188 struct sk_buff *skb) 2189 { 2190 struct hci_cp_read_tx_power *sent; 2191 struct hci_rp_read_tx_power *rp = data; 2192 struct hci_conn *conn; 2193 2194 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2195 2196 if (rp->status) 2197 return rp->status; 2198 2199 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER); 2200 if (!sent) 2201 return rp->status; 2202 2203 hci_dev_lock(hdev); 2204 2205 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 2206 if (!conn) 2207 goto unlock; 2208 2209 switch (sent->type) { 2210 case 0x00: 2211 conn->tx_power = rp->tx_power; 2212 break; 2213 case 0x01: 2214 conn->max_tx_power = rp->tx_power; 2215 break; 2216 } 2217 2218 unlock: 2219 hci_dev_unlock(hdev); 2220 return rp->status; 2221 } 2222 2223 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data, 2224 struct sk_buff *skb) 2225 { 2226 struct hci_ev_status *rp = data; 2227 u8 *mode; 2228 2229 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2230 2231 if (rp->status) 2232 return rp->status; 2233 2234 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE); 2235 if (mode) 2236 hdev->ssp_debug_mode = *mode; 2237 2238 return rp->status; 2239 } 2240 2241 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status) 2242 { 2243 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2244 2245 if (status) 2246 return; 2247 2248 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY)) 2249 set_bit(HCI_INQUIRY, &hdev->flags); 2250 } 2251 2252 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status) 2253 { 2254 struct hci_cp_create_conn *cp; 2255 struct hci_conn *conn; 2256 2257 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2258 2259 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN); 2260 if (!cp) 2261 return; 2262 2263 hci_dev_lock(hdev); 2264 2265 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 2266 2267 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn); 2268 2269 if (status) { 2270 if (conn && conn->state == BT_CONNECT) { 2271 conn->state = BT_CLOSED; 2272 hci_connect_cfm(conn, status); 2273 hci_conn_del(conn); 2274 } 2275 } else { 2276 if (!conn) { 2277 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr, 2278 0, HCI_ROLE_MASTER); 2279 if (IS_ERR(conn)) 2280 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 2281 } 2282 } 2283 2284 hci_dev_unlock(hdev); 2285 } 2286 2287 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status) 2288 { 2289 struct hci_cp_add_sco *cp; 2290 struct hci_conn *acl; 2291 struct hci_link *link; 2292 __u16 handle; 2293 2294 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2295 2296 if (!status) 2297 return; 2298 2299 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO); 2300 if (!cp) 2301 return; 2302 2303 handle = __le16_to_cpu(cp->handle); 2304 2305 bt_dev_dbg(hdev, "handle 0x%4.4x", handle); 2306 2307 hci_dev_lock(hdev); 2308 2309 acl = hci_conn_hash_lookup_handle(hdev, handle); 2310 if (acl) { 2311 link = list_first_entry_or_null(&acl->link_list, 2312 struct hci_link, list); 2313 if (link && link->conn) { 2314 link->conn->state = BT_CLOSED; 2315 2316 hci_connect_cfm(link->conn, status); 2317 hci_conn_del(link->conn); 2318 } 2319 } 2320 2321 hci_dev_unlock(hdev); 2322 } 2323 2324 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status) 2325 { 2326 struct hci_cp_auth_requested *cp; 2327 struct hci_conn *conn; 2328 2329 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2330 2331 if (!status) 2332 return; 2333 2334 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED); 2335 if (!cp) 2336 return; 2337 2338 hci_dev_lock(hdev); 2339 2340 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2341 if (conn) { 2342 if (conn->state == BT_CONFIG) { 2343 hci_connect_cfm(conn, status); 2344 hci_conn_drop(conn); 2345 } 2346 } 2347 2348 hci_dev_unlock(hdev); 2349 } 2350 2351 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status) 2352 { 2353 struct hci_cp_set_conn_encrypt *cp; 2354 struct hci_conn *conn; 2355 2356 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2357 2358 if (!status) 2359 return; 2360 2361 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT); 2362 if (!cp) 2363 return; 2364 2365 hci_dev_lock(hdev); 2366 2367 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2368 if (conn) { 2369 if (conn->state == BT_CONFIG) { 2370 hci_connect_cfm(conn, status); 2371 hci_conn_drop(conn); 2372 } 2373 } 2374 2375 hci_dev_unlock(hdev); 2376 } 2377 2378 static int hci_outgoing_auth_needed(struct hci_dev *hdev, 2379 struct hci_conn *conn) 2380 { 2381 if (conn->state != BT_CONFIG || !conn->out) 2382 return 0; 2383 2384 if (conn->pending_sec_level == BT_SECURITY_SDP) 2385 return 0; 2386 2387 /* Only request authentication for SSP connections or non-SSP 2388 * devices with sec_level MEDIUM or HIGH or if MITM protection 2389 * is requested. 2390 */ 2391 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) && 2392 conn->pending_sec_level != BT_SECURITY_FIPS && 2393 conn->pending_sec_level != BT_SECURITY_HIGH && 2394 conn->pending_sec_level != BT_SECURITY_MEDIUM) 2395 return 0; 2396 2397 return 1; 2398 } 2399 2400 static int hci_resolve_name(struct hci_dev *hdev, 2401 struct inquiry_entry *e) 2402 { 2403 struct hci_cp_remote_name_req cp; 2404 2405 memset(&cp, 0, sizeof(cp)); 2406 2407 bacpy(&cp.bdaddr, &e->data.bdaddr); 2408 cp.pscan_rep_mode = e->data.pscan_rep_mode; 2409 cp.pscan_mode = e->data.pscan_mode; 2410 cp.clock_offset = e->data.clock_offset; 2411 2412 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); 2413 } 2414 2415 static bool hci_resolve_next_name(struct hci_dev *hdev) 2416 { 2417 struct discovery_state *discov = &hdev->discovery; 2418 struct inquiry_entry *e; 2419 2420 if (list_empty(&discov->resolve)) 2421 return false; 2422 2423 /* We should stop if we already spent too much time resolving names. */ 2424 if (time_after(jiffies, discov->name_resolve_timeout)) { 2425 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long."); 2426 return false; 2427 } 2428 2429 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED); 2430 if (!e) 2431 return false; 2432 2433 if (hci_resolve_name(hdev, e) == 0) { 2434 e->name_state = NAME_PENDING; 2435 return true; 2436 } 2437 2438 return false; 2439 } 2440 2441 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn, 2442 bdaddr_t *bdaddr, u8 *name, u8 name_len) 2443 { 2444 struct discovery_state *discov = &hdev->discovery; 2445 struct inquiry_entry *e; 2446 2447 /* Update the mgmt connected state if necessary. Be careful with 2448 * conn objects that exist but are not (yet) connected however. 2449 * Only those in BT_CONFIG or BT_CONNECTED states can be 2450 * considered connected. 2451 */ 2452 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED)) 2453 mgmt_device_connected(hdev, conn, name, name_len); 2454 2455 if (discov->state == DISCOVERY_STOPPED) 2456 return; 2457 2458 if (discov->state == DISCOVERY_STOPPING) 2459 goto discov_complete; 2460 2461 if (discov->state != DISCOVERY_RESOLVING) 2462 return; 2463 2464 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING); 2465 /* If the device was not found in a list of found devices names of which 2466 * are pending. there is no need to continue resolving a next name as it 2467 * will be done upon receiving another Remote Name Request Complete 2468 * Event */ 2469 if (!e) 2470 return; 2471 2472 list_del(&e->list); 2473 2474 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN; 2475 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi, 2476 name, name_len); 2477 2478 if (hci_resolve_next_name(hdev)) 2479 return; 2480 2481 discov_complete: 2482 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 2483 } 2484 2485 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status) 2486 { 2487 struct hci_cp_remote_name_req *cp; 2488 struct hci_conn *conn; 2489 2490 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2491 2492 /* If successful wait for the name req complete event before 2493 * checking for the need to do authentication */ 2494 if (!status) 2495 return; 2496 2497 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ); 2498 if (!cp) 2499 return; 2500 2501 hci_dev_lock(hdev); 2502 2503 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 2504 2505 if (hci_dev_test_flag(hdev, HCI_MGMT)) 2506 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0); 2507 2508 if (!conn) 2509 goto unlock; 2510 2511 if (!hci_outgoing_auth_needed(hdev, conn)) 2512 goto unlock; 2513 2514 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { 2515 struct hci_cp_auth_requested auth_cp; 2516 2517 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); 2518 2519 auth_cp.handle = __cpu_to_le16(conn->handle); 2520 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, 2521 sizeof(auth_cp), &auth_cp); 2522 } 2523 2524 unlock: 2525 hci_dev_unlock(hdev); 2526 } 2527 2528 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status) 2529 { 2530 struct hci_cp_read_remote_features *cp; 2531 struct hci_conn *conn; 2532 2533 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2534 2535 if (!status) 2536 return; 2537 2538 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES); 2539 if (!cp) 2540 return; 2541 2542 hci_dev_lock(hdev); 2543 2544 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2545 if (conn) { 2546 if (conn->state == BT_CONFIG) { 2547 hci_connect_cfm(conn, status); 2548 hci_conn_drop(conn); 2549 } 2550 } 2551 2552 hci_dev_unlock(hdev); 2553 } 2554 2555 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status) 2556 { 2557 struct hci_cp_read_remote_ext_features *cp; 2558 struct hci_conn *conn; 2559 2560 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2561 2562 if (!status) 2563 return; 2564 2565 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES); 2566 if (!cp) 2567 return; 2568 2569 hci_dev_lock(hdev); 2570 2571 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2572 if (conn) { 2573 if (conn->state == BT_CONFIG) { 2574 hci_connect_cfm(conn, status); 2575 hci_conn_drop(conn); 2576 } 2577 } 2578 2579 hci_dev_unlock(hdev); 2580 } 2581 2582 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle, 2583 __u8 status) 2584 { 2585 struct hci_conn *acl; 2586 struct hci_link *link; 2587 2588 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status); 2589 2590 hci_dev_lock(hdev); 2591 2592 acl = hci_conn_hash_lookup_handle(hdev, handle); 2593 if (acl) { 2594 link = list_first_entry_or_null(&acl->link_list, 2595 struct hci_link, list); 2596 if (link && link->conn) { 2597 link->conn->state = BT_CLOSED; 2598 2599 hci_connect_cfm(link->conn, status); 2600 hci_conn_del(link->conn); 2601 } 2602 } 2603 2604 hci_dev_unlock(hdev); 2605 } 2606 2607 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status) 2608 { 2609 struct hci_cp_setup_sync_conn *cp; 2610 2611 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2612 2613 if (!status) 2614 return; 2615 2616 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN); 2617 if (!cp) 2618 return; 2619 2620 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status); 2621 } 2622 2623 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status) 2624 { 2625 struct hci_cp_enhanced_setup_sync_conn *cp; 2626 2627 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2628 2629 if (!status) 2630 return; 2631 2632 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN); 2633 if (!cp) 2634 return; 2635 2636 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status); 2637 } 2638 2639 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status) 2640 { 2641 struct hci_cp_sniff_mode *cp; 2642 struct hci_conn *conn; 2643 2644 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2645 2646 if (!status) 2647 return; 2648 2649 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE); 2650 if (!cp) 2651 return; 2652 2653 hci_dev_lock(hdev); 2654 2655 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2656 if (conn) { 2657 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags); 2658 2659 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) 2660 hci_sco_setup(conn, status); 2661 } 2662 2663 hci_dev_unlock(hdev); 2664 } 2665 2666 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status) 2667 { 2668 struct hci_cp_exit_sniff_mode *cp; 2669 struct hci_conn *conn; 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_EXIT_SNIFF_MODE); 2677 if (!cp) 2678 return; 2679 2680 hci_dev_lock(hdev); 2681 2682 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2683 if (conn) { 2684 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags); 2685 2686 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) 2687 hci_sco_setup(conn, status); 2688 } 2689 2690 hci_dev_unlock(hdev); 2691 } 2692 2693 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status) 2694 { 2695 struct hci_cp_disconnect *cp; 2696 struct hci_conn_params *params; 2697 struct hci_conn *conn; 2698 bool mgmt_conn; 2699 2700 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2701 2702 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended 2703 * otherwise cleanup the connection immediately. 2704 */ 2705 if (!status && !hdev->suspended) 2706 return; 2707 2708 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT); 2709 if (!cp) 2710 return; 2711 2712 hci_dev_lock(hdev); 2713 2714 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2715 if (!conn) 2716 goto unlock; 2717 2718 if (status && status != HCI_ERROR_UNKNOWN_CONN_ID) { 2719 mgmt_disconnect_failed(hdev, &conn->dst, conn->type, 2720 conn->dst_type, status); 2721 2722 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) { 2723 hdev->cur_adv_instance = conn->adv_instance; 2724 hci_enable_advertising(hdev); 2725 } 2726 2727 /* Inform sockets conn is gone before we delete it */ 2728 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED); 2729 2730 goto done; 2731 } 2732 2733 /* During suspend, mark connection as closed immediately 2734 * since we might not receive HCI_EV_DISCONN_COMPLETE 2735 */ 2736 if (hdev->suspended) 2737 conn->state = BT_CLOSED; 2738 2739 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags); 2740 2741 if (conn->type == ACL_LINK) { 2742 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) 2743 hci_remove_link_key(hdev, &conn->dst); 2744 } 2745 2746 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); 2747 if (params) { 2748 switch (params->auto_connect) { 2749 case HCI_AUTO_CONN_LINK_LOSS: 2750 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT) 2751 break; 2752 fallthrough; 2753 2754 case HCI_AUTO_CONN_DIRECT: 2755 case HCI_AUTO_CONN_ALWAYS: 2756 hci_pend_le_list_del_init(params); 2757 hci_pend_le_list_add(params, &hdev->pend_le_conns); 2758 break; 2759 2760 default: 2761 break; 2762 } 2763 } 2764 2765 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type, 2766 hci_to_mgmt_reason(cp->reason), mgmt_conn); 2767 2768 hci_disconn_cfm(conn, cp->reason); 2769 2770 done: 2771 /* If the disconnection failed for any reason, the upper layer 2772 * does not retry to disconnect in current implementation. 2773 * Hence, we need to do some basic cleanup here and re-enable 2774 * advertising if necessary. 2775 */ 2776 hci_conn_del(conn); 2777 unlock: 2778 hci_dev_unlock(hdev); 2779 } 2780 2781 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved) 2782 { 2783 /* When using controller based address resolution, then the new 2784 * address types 0x02 and 0x03 are used. These types need to be 2785 * converted back into either public address or random address type 2786 */ 2787 switch (type) { 2788 case ADDR_LE_DEV_PUBLIC_RESOLVED: 2789 if (resolved) 2790 *resolved = true; 2791 return ADDR_LE_DEV_PUBLIC; 2792 case ADDR_LE_DEV_RANDOM_RESOLVED: 2793 if (resolved) 2794 *resolved = true; 2795 return ADDR_LE_DEV_RANDOM; 2796 } 2797 2798 if (resolved) 2799 *resolved = false; 2800 return type; 2801 } 2802 2803 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr, 2804 u8 peer_addr_type, u8 own_address_type, 2805 u8 filter_policy) 2806 { 2807 struct hci_conn *conn; 2808 2809 conn = hci_conn_hash_lookup_le(hdev, peer_addr, 2810 peer_addr_type); 2811 if (!conn) 2812 return; 2813 2814 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL); 2815 2816 /* Store the initiator and responder address information which 2817 * is needed for SMP. These values will not change during the 2818 * lifetime of the connection. 2819 */ 2820 conn->init_addr_type = own_address_type; 2821 if (own_address_type == ADDR_LE_DEV_RANDOM) 2822 bacpy(&conn->init_addr, &hdev->random_addr); 2823 else 2824 bacpy(&conn->init_addr, &hdev->bdaddr); 2825 2826 conn->resp_addr_type = peer_addr_type; 2827 bacpy(&conn->resp_addr, peer_addr); 2828 } 2829 2830 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status) 2831 { 2832 struct hci_cp_le_create_conn *cp; 2833 2834 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2835 2836 /* All connection failure handling is taken care of by the 2837 * hci_conn_failed function which is triggered by the HCI 2838 * request completion callbacks used for connecting. 2839 */ 2840 if (status) 2841 return; 2842 2843 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN); 2844 if (!cp) 2845 return; 2846 2847 hci_dev_lock(hdev); 2848 2849 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type, 2850 cp->own_address_type, cp->filter_policy); 2851 2852 hci_dev_unlock(hdev); 2853 } 2854 2855 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status) 2856 { 2857 struct hci_cp_le_ext_create_conn *cp; 2858 2859 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2860 2861 /* All connection failure handling is taken care of by the 2862 * hci_conn_failed function which is triggered by the HCI 2863 * request completion callbacks used for connecting. 2864 */ 2865 if (status) 2866 return; 2867 2868 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN); 2869 if (!cp) 2870 return; 2871 2872 hci_dev_lock(hdev); 2873 2874 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type, 2875 cp->own_addr_type, cp->filter_policy); 2876 2877 hci_dev_unlock(hdev); 2878 } 2879 2880 static void hci_cs_le_set_phy(struct hci_dev *hdev, u8 status) 2881 { 2882 struct hci_cp_le_set_phy *cp; 2883 struct hci_conn *conn; 2884 2885 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2886 2887 if (status) 2888 return; 2889 2890 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PHY); 2891 if (!cp) 2892 return; 2893 2894 hci_dev_lock(hdev); 2895 2896 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2897 if (conn) { 2898 conn->le_tx_def_phys = cp->tx_phys; 2899 conn->le_rx_def_phys = cp->rx_phys; 2900 } 2901 2902 hci_dev_unlock(hdev); 2903 } 2904 2905 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status) 2906 { 2907 struct hci_cp_le_read_remote_features *cp; 2908 struct hci_conn *conn; 2909 2910 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2911 2912 if (!status) 2913 return; 2914 2915 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES); 2916 if (!cp) 2917 return; 2918 2919 hci_dev_lock(hdev); 2920 2921 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2922 if (conn && conn->state == BT_CONFIG) 2923 hci_connect_cfm(conn, status); 2924 2925 hci_dev_unlock(hdev); 2926 } 2927 2928 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status) 2929 { 2930 struct hci_cp_le_start_enc *cp; 2931 struct hci_conn *conn; 2932 2933 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2934 2935 if (!status) 2936 return; 2937 2938 hci_dev_lock(hdev); 2939 2940 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC); 2941 if (!cp) 2942 goto unlock; 2943 2944 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2945 if (!conn) 2946 goto unlock; 2947 2948 if (conn->state != BT_CONNECTED) 2949 goto unlock; 2950 2951 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 2952 hci_conn_drop(conn); 2953 2954 unlock: 2955 hci_dev_unlock(hdev); 2956 } 2957 2958 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status) 2959 { 2960 struct hci_cp_switch_role *cp; 2961 struct hci_conn *conn; 2962 2963 BT_DBG("%s status 0x%2.2x", hdev->name, status); 2964 2965 if (!status) 2966 return; 2967 2968 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE); 2969 if (!cp) 2970 return; 2971 2972 hci_dev_lock(hdev); 2973 2974 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 2975 if (conn) 2976 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags); 2977 2978 hci_dev_unlock(hdev); 2979 } 2980 2981 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data, 2982 struct sk_buff *skb) 2983 { 2984 struct hci_ev_status *ev = data; 2985 struct discovery_state *discov = &hdev->discovery; 2986 struct inquiry_entry *e; 2987 2988 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 2989 2990 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags)) 2991 return; 2992 2993 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */ 2994 wake_up_bit(&hdev->flags, HCI_INQUIRY); 2995 2996 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 2997 return; 2998 2999 hci_dev_lock(hdev); 3000 3001 if (discov->state != DISCOVERY_FINDING) 3002 goto unlock; 3003 3004 if (list_empty(&discov->resolve)) { 3005 /* When BR/EDR inquiry is active and no LE scanning is in 3006 * progress, then change discovery state to indicate completion. 3007 * 3008 * When running LE scanning and BR/EDR inquiry simultaneously 3009 * and the LE scan already finished, then change the discovery 3010 * state to indicate completion. 3011 */ 3012 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || 3013 !hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY)) 3014 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 3015 goto unlock; 3016 } 3017 3018 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED); 3019 if (e && hci_resolve_name(hdev, e) == 0) { 3020 e->name_state = NAME_PENDING; 3021 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING); 3022 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION; 3023 } else { 3024 /* When BR/EDR inquiry is active and no LE scanning is in 3025 * progress, then change discovery state to indicate completion. 3026 * 3027 * When running LE scanning and BR/EDR inquiry simultaneously 3028 * and the LE scan already finished, then change the discovery 3029 * state to indicate completion. 3030 */ 3031 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || 3032 !hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY)) 3033 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 3034 } 3035 3036 unlock: 3037 hci_dev_unlock(hdev); 3038 } 3039 3040 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata, 3041 struct sk_buff *skb) 3042 { 3043 struct hci_ev_inquiry_result *ev = edata; 3044 struct inquiry_data data; 3045 int i; 3046 3047 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT, 3048 flex_array_size(ev, info, ev->num))) 3049 return; 3050 3051 bt_dev_dbg(hdev, "num %d", ev->num); 3052 3053 if (!ev->num) 3054 return; 3055 3056 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) 3057 return; 3058 3059 hci_dev_lock(hdev); 3060 3061 for (i = 0; i < ev->num; i++) { 3062 struct inquiry_info *info = &ev->info[i]; 3063 u32 flags; 3064 3065 bacpy(&data.bdaddr, &info->bdaddr); 3066 data.pscan_rep_mode = info->pscan_rep_mode; 3067 data.pscan_period_mode = info->pscan_period_mode; 3068 data.pscan_mode = info->pscan_mode; 3069 memcpy(data.dev_class, info->dev_class, 3); 3070 data.clock_offset = info->clock_offset; 3071 data.rssi = HCI_RSSI_INVALID; 3072 data.ssp_mode = 0x00; 3073 3074 flags = hci_inquiry_cache_update(hdev, &data, false); 3075 3076 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 3077 info->dev_class, HCI_RSSI_INVALID, 3078 flags, NULL, 0, NULL, 0, 0); 3079 } 3080 3081 hci_dev_unlock(hdev); 3082 } 3083 3084 static int hci_read_enc_key_size(struct hci_dev *hdev, struct hci_conn *conn) 3085 { 3086 struct hci_cp_read_enc_key_size cp; 3087 u8 *key_enc_size = hci_conn_key_enc_size(conn); 3088 3089 if (!read_key_size_capable(hdev)) { 3090 conn->enc_key_size = HCI_LINK_KEY_SIZE; 3091 return -EOPNOTSUPP; 3092 } 3093 3094 bt_dev_dbg(hdev, "hcon %p", conn); 3095 3096 memset(&cp, 0, sizeof(cp)); 3097 cp.handle = cpu_to_le16(conn->handle); 3098 3099 /* If the key enc_size is already known, use it as conn->enc_key_size, 3100 * otherwise use hdev->min_enc_key_size so the likes of 3101 * l2cap_check_enc_key_size don't fail while waiting for 3102 * HCI_OP_READ_ENC_KEY_SIZE response. 3103 */ 3104 if (key_enc_size && *key_enc_size) 3105 conn->enc_key_size = *key_enc_size; 3106 else 3107 conn->enc_key_size = hdev->min_enc_key_size; 3108 3109 return hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp); 3110 } 3111 3112 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data, 3113 struct sk_buff *skb) 3114 { 3115 struct hci_ev_conn_complete *ev = data; 3116 struct hci_conn *conn; 3117 u8 status = ev->status; 3118 3119 bt_dev_dbg(hdev, "status 0x%2.2x", status); 3120 3121 hci_dev_lock(hdev); 3122 hci_store_wake_reason(hdev, &ev->bdaddr, BDADDR_BREDR); 3123 3124 /* Check for existing connection: 3125 * 3126 * 1. If it doesn't exist then it must be receiver/slave role. 3127 * 2. If it does exist confirm that it is connecting/BT_CONNECT in case 3128 * of initiator/master role since there could be a collision where 3129 * either side is attempting to connect or something like a fuzzing 3130 * testing is trying to play tricks to destroy the hcon object before 3131 * it even attempts to connect (e.g. hcon->state == BT_OPEN). 3132 */ 3133 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr); 3134 if (!conn || 3135 (conn->role == HCI_ROLE_MASTER && conn->state != BT_CONNECT)) { 3136 /* In case of error status and there is no connection pending 3137 * just unlock as there is nothing to cleanup. 3138 */ 3139 if (ev->status) 3140 goto unlock; 3141 3142 /* Connection may not exist if auto-connected. Check the bredr 3143 * allowlist to see if this device is allowed to auto connect. 3144 * If link is an ACL type, create a connection class 3145 * automatically. 3146 * 3147 * Auto-connect will only occur if the event filter is 3148 * programmed with a given address. Right now, event filter is 3149 * only used during suspend. 3150 */ 3151 if (ev->link_type == ACL_LINK && 3152 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, 3153 &ev->bdaddr, 3154 BDADDR_BREDR)) { 3155 conn = hci_conn_add_unset(hdev, ev->link_type, 3156 &ev->bdaddr, 0, 3157 HCI_ROLE_SLAVE); 3158 if (IS_ERR(conn)) { 3159 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 3160 goto unlock; 3161 } 3162 } else { 3163 if (ev->link_type != SCO_LINK) 3164 goto unlock; 3165 3166 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, 3167 &ev->bdaddr); 3168 if (!conn) 3169 goto unlock; 3170 3171 conn->type = SCO_LINK; 3172 } 3173 } 3174 3175 /* The HCI_Connection_Complete event is only sent once per connection. 3176 * Processing it more than once per connection can corrupt kernel memory. 3177 * 3178 * As the connection handle is set here for the first time, it indicates 3179 * whether the connection is already set up. 3180 */ 3181 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { 3182 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection"); 3183 goto unlock; 3184 } 3185 3186 if (!status) { 3187 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle)); 3188 if (status) 3189 goto done; 3190 3191 if (conn->type == ACL_LINK) { 3192 conn->state = BT_CONFIG; 3193 hci_conn_hold(conn); 3194 3195 if (!conn->out && !hci_conn_ssp_enabled(conn) && 3196 !hci_find_link_key(hdev, &ev->bdaddr)) 3197 conn->disc_timeout = HCI_PAIRING_TIMEOUT; 3198 else 3199 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 3200 } else 3201 conn->state = BT_CONNECTED; 3202 3203 hci_debugfs_create_conn(conn); 3204 hci_conn_add_sysfs(conn); 3205 3206 if (test_bit(HCI_AUTH, &hdev->flags)) 3207 set_bit(HCI_CONN_AUTH, &conn->flags); 3208 3209 if (test_bit(HCI_ENCRYPT, &hdev->flags)) 3210 set_bit(HCI_CONN_ENCRYPT, &conn->flags); 3211 3212 /* "Link key request" completed ahead of "connect request" completes */ 3213 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) && 3214 ev->link_type == ACL_LINK) { 3215 struct link_key *key; 3216 3217 key = hci_find_link_key(hdev, &ev->bdaddr); 3218 if (key) { 3219 set_bit(HCI_CONN_ENCRYPT, &conn->flags); 3220 hci_read_enc_key_size(hdev, conn); 3221 hci_encrypt_cfm(conn, ev->status); 3222 } 3223 } 3224 3225 /* Get remote features */ 3226 if (conn->type == ACL_LINK) { 3227 struct hci_cp_read_remote_features cp; 3228 cp.handle = ev->handle; 3229 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES, 3230 sizeof(cp), &cp); 3231 3232 hci_update_scan(hdev); 3233 } 3234 3235 /* Set packet type for incoming connection */ 3236 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) { 3237 struct hci_cp_change_conn_ptype cp; 3238 cp.handle = ev->handle; 3239 cp.pkt_type = cpu_to_le16(conn->pkt_type); 3240 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp), 3241 &cp); 3242 } 3243 } 3244 3245 if (conn->type == ACL_LINK) 3246 hci_sco_setup(conn, ev->status); 3247 3248 done: 3249 if (status) { 3250 hci_conn_failed(conn, status); 3251 } else if (ev->link_type == SCO_LINK) { 3252 switch (conn->setting & SCO_AIRMODE_MASK) { 3253 case SCO_AIRMODE_CVSD: 3254 if (hdev->notify) 3255 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD); 3256 break; 3257 } 3258 3259 hci_connect_cfm(conn, status); 3260 } 3261 3262 unlock: 3263 hci_dev_unlock(hdev); 3264 } 3265 3266 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr) 3267 { 3268 struct hci_cp_reject_conn_req cp; 3269 3270 bacpy(&cp.bdaddr, bdaddr); 3271 cp.reason = HCI_ERROR_REJ_BAD_ADDR; 3272 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp); 3273 } 3274 3275 static void hci_conn_request_evt(struct hci_dev *hdev, void *data, 3276 struct sk_buff *skb) 3277 { 3278 struct hci_ev_conn_request *ev = data; 3279 int mask = hdev->link_mode; 3280 struct inquiry_entry *ie; 3281 struct hci_conn *conn; 3282 __u8 flags = 0; 3283 3284 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type); 3285 3286 hci_dev_lock(hdev); 3287 hci_store_wake_reason(hdev, &ev->bdaddr, BDADDR_BREDR); 3288 hci_dev_unlock(hdev); 3289 3290 /* Reject incoming connection from device with same BD ADDR against 3291 * CVE-2020-26555 3292 */ 3293 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) { 3294 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n", 3295 &ev->bdaddr); 3296 hci_reject_conn(hdev, &ev->bdaddr); 3297 return; 3298 } 3299 3300 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type, 3301 &flags); 3302 3303 if (!(mask & HCI_LM_ACCEPT)) { 3304 hci_reject_conn(hdev, &ev->bdaddr); 3305 return; 3306 } 3307 3308 hci_dev_lock(hdev); 3309 3310 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr, 3311 BDADDR_BREDR)) { 3312 hci_reject_conn(hdev, &ev->bdaddr); 3313 goto unlock; 3314 } 3315 3316 /* Require HCI_CONNECTABLE or an accept list entry to accept the 3317 * connection. These features are only touched through mgmt so 3318 * only do the checks if HCI_MGMT is set. 3319 */ 3320 if (hci_dev_test_flag(hdev, HCI_MGMT) && 3321 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) && 3322 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr, 3323 BDADDR_BREDR)) { 3324 hci_reject_conn(hdev, &ev->bdaddr); 3325 goto unlock; 3326 } 3327 3328 /* Connection accepted */ 3329 3330 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); 3331 if (ie) 3332 memcpy(ie->data.dev_class, ev->dev_class, 3); 3333 3334 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, 3335 &ev->bdaddr); 3336 if (!conn) { 3337 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr, 0, 3338 HCI_ROLE_SLAVE); 3339 if (IS_ERR(conn)) { 3340 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 3341 goto unlock; 3342 } 3343 } 3344 3345 memcpy(conn->dev_class, ev->dev_class, 3); 3346 3347 if (ev->link_type == ACL_LINK || 3348 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) { 3349 struct hci_cp_accept_conn_req cp; 3350 conn->state = BT_CONNECT; 3351 3352 bacpy(&cp.bdaddr, &ev->bdaddr); 3353 3354 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER)) 3355 cp.role = 0x00; /* Become central */ 3356 else 3357 cp.role = 0x01; /* Remain peripheral */ 3358 3359 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); 3360 } else if (!(flags & HCI_PROTO_DEFER)) { 3361 struct hci_cp_accept_sync_conn_req cp; 3362 conn->state = BT_CONNECT; 3363 3364 bacpy(&cp.bdaddr, &ev->bdaddr); 3365 cp.pkt_type = cpu_to_le16(conn->pkt_type); 3366 3367 cp.tx_bandwidth = cpu_to_le32(0x00001f40); 3368 cp.rx_bandwidth = cpu_to_le32(0x00001f40); 3369 cp.max_latency = cpu_to_le16(0xffff); 3370 cp.content_format = cpu_to_le16(hdev->voice_setting); 3371 cp.retrans_effort = 0xff; 3372 3373 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp), 3374 &cp); 3375 } else { 3376 conn->state = BT_CONNECT2; 3377 hci_connect_cfm(conn, 0); 3378 } 3379 3380 unlock: 3381 hci_dev_unlock(hdev); 3382 } 3383 3384 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data, 3385 struct sk_buff *skb) 3386 { 3387 struct hci_ev_disconn_complete *ev = data; 3388 u8 reason; 3389 struct hci_conn_params *params; 3390 struct hci_conn *conn; 3391 bool mgmt_connected; 3392 3393 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3394 3395 hci_dev_lock(hdev); 3396 3397 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3398 if (!conn) 3399 goto unlock; 3400 3401 if (ev->status) { 3402 mgmt_disconnect_failed(hdev, &conn->dst, conn->type, 3403 conn->dst_type, ev->status); 3404 goto unlock; 3405 } 3406 3407 conn->state = BT_CLOSED; 3408 3409 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags); 3410 3411 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags)) 3412 reason = MGMT_DEV_DISCONN_AUTH_FAILURE; 3413 else 3414 reason = hci_to_mgmt_reason(ev->reason); 3415 3416 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type, 3417 reason, mgmt_connected); 3418 3419 if (conn->type == ACL_LINK) { 3420 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) 3421 hci_remove_link_key(hdev, &conn->dst); 3422 3423 hci_update_scan(hdev); 3424 } 3425 3426 /* Re-enable passive scanning if disconnected device is marked 3427 * as auto-connectable. 3428 */ 3429 if (conn->type == LE_LINK) { 3430 params = hci_conn_params_lookup(hdev, &conn->dst, 3431 conn->dst_type); 3432 if (params) { 3433 switch (params->auto_connect) { 3434 case HCI_AUTO_CONN_LINK_LOSS: 3435 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT) 3436 break; 3437 fallthrough; 3438 3439 case HCI_AUTO_CONN_DIRECT: 3440 case HCI_AUTO_CONN_ALWAYS: 3441 hci_pend_le_list_del_init(params); 3442 hci_pend_le_list_add(params, 3443 &hdev->pend_le_conns); 3444 hci_update_passive_scan(hdev); 3445 break; 3446 3447 default: 3448 break; 3449 } 3450 } 3451 } 3452 3453 hci_disconn_cfm(conn, ev->reason); 3454 3455 /* Re-enable advertising if necessary, since it might 3456 * have been disabled by the connection. From the 3457 * HCI_LE_Set_Advertise_Enable command description in 3458 * the core specification (v4.0): 3459 * "The Controller shall continue advertising until the Host 3460 * issues an LE_Set_Advertise_Enable command with 3461 * Advertising_Enable set to 0x00 (Advertising is disabled) 3462 * or until a connection is created or until the Advertising 3463 * is timed out due to Directed Advertising." 3464 */ 3465 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) { 3466 hdev->cur_adv_instance = conn->adv_instance; 3467 hci_enable_advertising(hdev); 3468 } 3469 3470 hci_conn_del(conn); 3471 3472 unlock: 3473 hci_dev_unlock(hdev); 3474 } 3475 3476 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data, 3477 struct sk_buff *skb) 3478 { 3479 struct hci_ev_auth_complete *ev = data; 3480 struct hci_conn *conn; 3481 3482 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3483 3484 hci_dev_lock(hdev); 3485 3486 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3487 if (!conn) 3488 goto unlock; 3489 3490 if (!ev->status) { 3491 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); 3492 set_bit(HCI_CONN_AUTH, &conn->flags); 3493 conn->sec_level = conn->pending_sec_level; 3494 } else { 3495 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING) 3496 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); 3497 3498 mgmt_auth_failed(conn, ev->status); 3499 } 3500 3501 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags); 3502 3503 if (conn->state == BT_CONFIG) { 3504 if (!ev->status && hci_conn_ssp_enabled(conn)) { 3505 struct hci_cp_set_conn_encrypt cp; 3506 cp.handle = ev->handle; 3507 cp.encrypt = 0x01; 3508 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), 3509 &cp); 3510 } else { 3511 conn->state = BT_CONNECTED; 3512 hci_connect_cfm(conn, ev->status); 3513 hci_conn_drop(conn); 3514 } 3515 } else { 3516 hci_auth_cfm(conn, ev->status); 3517 3518 hci_conn_hold(conn); 3519 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 3520 hci_conn_drop(conn); 3521 } 3522 3523 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { 3524 if (!ev->status) { 3525 struct hci_cp_set_conn_encrypt cp; 3526 cp.handle = ev->handle; 3527 cp.encrypt = 0x01; 3528 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), 3529 &cp); 3530 } else { 3531 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 3532 hci_encrypt_cfm(conn, ev->status); 3533 } 3534 } 3535 3536 unlock: 3537 hci_dev_unlock(hdev); 3538 } 3539 3540 static void hci_remote_name_evt(struct hci_dev *hdev, void *data, 3541 struct sk_buff *skb) 3542 { 3543 struct hci_ev_remote_name *ev = data; 3544 struct hci_conn *conn; 3545 3546 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3547 3548 hci_dev_lock(hdev); 3549 3550 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 3551 3552 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 3553 goto check_auth; 3554 3555 if (ev->status == 0) 3556 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name, 3557 strnlen(ev->name, HCI_MAX_NAME_LENGTH)); 3558 else 3559 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0); 3560 3561 check_auth: 3562 if (!conn) 3563 goto unlock; 3564 3565 if (!hci_outgoing_auth_needed(hdev, conn)) 3566 goto unlock; 3567 3568 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { 3569 struct hci_cp_auth_requested cp; 3570 3571 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); 3572 3573 cp.handle = __cpu_to_le16(conn->handle); 3574 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp); 3575 } 3576 3577 unlock: 3578 hci_dev_unlock(hdev); 3579 } 3580 3581 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data, 3582 struct sk_buff *skb) 3583 { 3584 struct hci_ev_encrypt_change *ev = data; 3585 struct hci_conn *conn; 3586 3587 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3588 3589 hci_dev_lock(hdev); 3590 3591 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3592 if (!conn) 3593 goto unlock; 3594 3595 if (!ev->status) { 3596 if (ev->encrypt) { 3597 /* Encryption implies authentication */ 3598 set_bit(HCI_CONN_AUTH, &conn->flags); 3599 set_bit(HCI_CONN_ENCRYPT, &conn->flags); 3600 conn->sec_level = conn->pending_sec_level; 3601 3602 /* P-256 authentication key implies FIPS */ 3603 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256) 3604 set_bit(HCI_CONN_FIPS, &conn->flags); 3605 3606 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) || 3607 conn->type == LE_LINK) 3608 set_bit(HCI_CONN_AES_CCM, &conn->flags); 3609 } else { 3610 clear_bit(HCI_CONN_ENCRYPT, &conn->flags); 3611 clear_bit(HCI_CONN_AES_CCM, &conn->flags); 3612 } 3613 } 3614 3615 /* We should disregard the current RPA and generate a new one 3616 * whenever the encryption procedure fails. 3617 */ 3618 if (ev->status && conn->type == LE_LINK) { 3619 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED); 3620 hci_adv_instances_set_rpa_expired(hdev, true); 3621 } 3622 3623 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 3624 3625 /* Check link security requirements are met */ 3626 if (!hci_conn_check_link_mode(conn)) 3627 ev->status = HCI_ERROR_AUTH_FAILURE; 3628 3629 if (ev->status && conn->state == BT_CONNECTED) { 3630 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING) 3631 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); 3632 3633 /* Notify upper layers so they can cleanup before 3634 * disconnecting. 3635 */ 3636 hci_encrypt_cfm(conn, ev->status); 3637 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 3638 hci_conn_drop(conn); 3639 goto unlock; 3640 } 3641 3642 /* Try reading the encryption key size for encrypted ACL links */ 3643 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) { 3644 if (hci_read_enc_key_size(hdev, conn)) 3645 goto notify; 3646 3647 goto unlock; 3648 } 3649 3650 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers 3651 * to avoid unexpected SMP command errors when pairing. 3652 */ 3653 if (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT)) 3654 goto notify; 3655 3656 /* Set the default Authenticated Payload Timeout after 3657 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B 3658 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be 3659 * sent when the link is active and Encryption is enabled, the conn 3660 * type can be either LE or ACL and controller must support LMP Ping. 3661 * Ensure for AES-CCM encryption as well. 3662 */ 3663 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) && 3664 test_bit(HCI_CONN_AES_CCM, &conn->flags) && 3665 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) || 3666 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) { 3667 struct hci_cp_write_auth_payload_to cp; 3668 3669 cp.handle = cpu_to_le16(conn->handle); 3670 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout); 3671 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO, 3672 sizeof(cp), &cp)) 3673 bt_dev_err(hdev, "write auth payload timeout failed"); 3674 } 3675 3676 notify: 3677 hci_encrypt_cfm(conn, ev->status); 3678 3679 unlock: 3680 hci_dev_unlock(hdev); 3681 } 3682 3683 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data, 3684 struct sk_buff *skb) 3685 { 3686 struct hci_ev_change_link_key_complete *ev = data; 3687 struct hci_conn *conn; 3688 3689 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3690 3691 hci_dev_lock(hdev); 3692 3693 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3694 if (conn) { 3695 if (!ev->status) 3696 set_bit(HCI_CONN_SECURE, &conn->flags); 3697 3698 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags); 3699 3700 hci_key_change_cfm(conn, ev->status); 3701 } 3702 3703 hci_dev_unlock(hdev); 3704 } 3705 3706 static void hci_remote_features_evt(struct hci_dev *hdev, void *data, 3707 struct sk_buff *skb) 3708 { 3709 struct hci_ev_remote_features *ev = data; 3710 struct hci_conn *conn; 3711 3712 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3713 3714 hci_dev_lock(hdev); 3715 3716 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3717 if (!conn) 3718 goto unlock; 3719 3720 if (!ev->status) 3721 memcpy(conn->features[0], ev->features, 8); 3722 3723 if (conn->state != BT_CONFIG) 3724 goto unlock; 3725 3726 if (!ev->status && lmp_ext_feat_capable(hdev) && 3727 lmp_ext_feat_capable(conn)) { 3728 struct hci_cp_read_remote_ext_features cp; 3729 cp.handle = ev->handle; 3730 cp.page = 0x01; 3731 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES, 3732 sizeof(cp), &cp); 3733 goto unlock; 3734 } 3735 3736 if (!ev->status) { 3737 struct hci_cp_remote_name_req cp; 3738 memset(&cp, 0, sizeof(cp)); 3739 bacpy(&cp.bdaddr, &conn->dst); 3740 cp.pscan_rep_mode = 0x02; 3741 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); 3742 } else { 3743 mgmt_device_connected(hdev, conn, NULL, 0); 3744 } 3745 3746 if (!hci_outgoing_auth_needed(hdev, conn)) { 3747 conn->state = BT_CONNECTED; 3748 hci_connect_cfm(conn, ev->status); 3749 hci_conn_drop(conn); 3750 } 3751 3752 unlock: 3753 hci_dev_unlock(hdev); 3754 } 3755 3756 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd) 3757 { 3758 cancel_delayed_work(&hdev->cmd_timer); 3759 3760 rcu_read_lock(); 3761 if (!test_bit(HCI_RESET, &hdev->flags)) { 3762 if (ncmd) { 3763 cancel_delayed_work(&hdev->ncmd_timer); 3764 atomic_set(&hdev->cmd_cnt, 1); 3765 } else { 3766 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) 3767 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer, 3768 HCI_NCMD_TIMEOUT); 3769 } 3770 } 3771 rcu_read_unlock(); 3772 } 3773 3774 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data, 3775 struct sk_buff *skb) 3776 { 3777 struct hci_rp_le_read_buffer_size_v2 *rp = data; 3778 3779 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3780 3781 if (rp->status) 3782 return rp->status; 3783 3784 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu); 3785 hdev->le_pkts = rp->acl_max_pkt; 3786 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu); 3787 hdev->iso_pkts = rp->iso_max_pkt; 3788 3789 hdev->le_cnt = hdev->le_pkts; 3790 hdev->iso_cnt = hdev->iso_pkts; 3791 3792 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu, 3793 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts); 3794 3795 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU) 3796 return HCI_ERROR_INVALID_PARAMETERS; 3797 3798 return rp->status; 3799 } 3800 3801 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status) 3802 { 3803 struct hci_conn *conn, *tmp; 3804 3805 lockdep_assert_held(&hdev->lock); 3806 3807 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) { 3808 if (conn->type != CIS_LINK || 3809 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig) 3810 continue; 3811 3812 if (HCI_CONN_HANDLE_UNSET(conn->handle)) 3813 hci_conn_failed(conn, status); 3814 } 3815 } 3816 3817 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data, 3818 struct sk_buff *skb) 3819 { 3820 struct hci_rp_le_set_cig_params *rp = data; 3821 struct hci_cp_le_set_cig_params *cp; 3822 struct hci_conn *conn; 3823 u8 status = rp->status; 3824 bool pending = false; 3825 int i; 3826 3827 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3828 3829 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS); 3830 if (!rp->status && (!cp || rp->num_handles != cp->num_cis || 3831 rp->cig_id != cp->cig_id)) { 3832 bt_dev_err(hdev, "unexpected Set CIG Parameters response data"); 3833 status = HCI_ERROR_UNSPECIFIED; 3834 } 3835 3836 hci_dev_lock(hdev); 3837 3838 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554 3839 * 3840 * If the Status return parameter is non-zero, then the state of the CIG 3841 * and its CIS configurations shall not be changed by the command. If 3842 * the CIG did not already exist, it shall not be created. 3843 */ 3844 if (status) { 3845 /* Keep current configuration, fail only the unbound CIS */ 3846 hci_unbound_cis_failed(hdev, rp->cig_id, status); 3847 goto unlock; 3848 } 3849 3850 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553 3851 * 3852 * If the Status return parameter is zero, then the Controller shall 3853 * set the Connection_Handle arrayed return parameter to the connection 3854 * handle(s) corresponding to the CIS configurations specified in 3855 * the CIS_IDs command parameter, in the same order. 3856 */ 3857 for (i = 0; i < rp->num_handles; ++i) { 3858 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id, 3859 cp->cis[i].cis_id); 3860 if (!conn || !bacmp(&conn->dst, BDADDR_ANY)) 3861 continue; 3862 3863 if (conn->state != BT_BOUND && conn->state != BT_CONNECT) 3864 continue; 3865 3866 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i]))) 3867 continue; 3868 3869 if (conn->state == BT_CONNECT) 3870 pending = true; 3871 } 3872 3873 unlock: 3874 if (pending) 3875 hci_le_create_cis_pending(hdev); 3876 3877 hci_dev_unlock(hdev); 3878 3879 return rp->status; 3880 } 3881 3882 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data, 3883 struct sk_buff *skb) 3884 { 3885 struct hci_rp_le_setup_iso_path *rp = data; 3886 struct hci_cp_le_setup_iso_path *cp; 3887 struct hci_conn *conn; 3888 3889 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3890 3891 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH); 3892 if (!cp) 3893 return rp->status; 3894 3895 hci_dev_lock(hdev); 3896 3897 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 3898 if (!conn) 3899 goto unlock; 3900 3901 if (rp->status) { 3902 hci_connect_cfm(conn, rp->status); 3903 hci_conn_del(conn); 3904 goto unlock; 3905 } 3906 3907 switch (cp->direction) { 3908 /* Input (Host to Controller) */ 3909 case 0x00: 3910 /* Only confirm connection if output only */ 3911 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu) 3912 hci_connect_cfm(conn, rp->status); 3913 break; 3914 /* Output (Controller to Host) */ 3915 case 0x01: 3916 /* Confirm connection since conn->iso_qos is always configured 3917 * last. 3918 */ 3919 hci_connect_cfm(conn, rp->status); 3920 3921 /* Notify device connected in case it is a BIG Sync */ 3922 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags)) 3923 mgmt_device_connected(hdev, conn, NULL, 0); 3924 3925 break; 3926 } 3927 3928 unlock: 3929 hci_dev_unlock(hdev); 3930 return rp->status; 3931 } 3932 3933 static u8 hci_cc_le_read_all_local_features(struct hci_dev *hdev, void *data, 3934 struct sk_buff *skb) 3935 { 3936 struct hci_rp_le_read_all_local_features *rp = data; 3937 3938 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3939 3940 if (rp->status) 3941 return rp->status; 3942 3943 memcpy(hdev->le_features, rp->features, 248); 3944 3945 return rp->status; 3946 } 3947 3948 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status) 3949 { 3950 bt_dev_dbg(hdev, "status 0x%2.2x", status); 3951 } 3952 3953 static void hci_cs_le_read_all_remote_features(struct hci_dev *hdev, u8 status) 3954 { 3955 struct hci_cp_le_read_remote_features *cp; 3956 struct hci_conn *conn; 3957 3958 bt_dev_dbg(hdev, "status 0x%2.2x", status); 3959 3960 if (!status) 3961 return; 3962 3963 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_ALL_REMOTE_FEATURES); 3964 if (!cp) 3965 return; 3966 3967 hci_dev_lock(hdev); 3968 3969 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 3970 if (conn && conn->state == BT_CONFIG) 3971 hci_connect_cfm(conn, status); 3972 3973 hci_dev_unlock(hdev); 3974 } 3975 3976 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data, 3977 struct sk_buff *skb) 3978 { 3979 struct hci_ev_status *rp = data; 3980 struct hci_cp_le_set_per_adv_params *cp; 3981 3982 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3983 3984 if (rp->status) 3985 return rp->status; 3986 3987 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS); 3988 if (!cp) 3989 return rp->status; 3990 3991 /* TODO: set the conn state */ 3992 return rp->status; 3993 } 3994 3995 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data, 3996 struct sk_buff *skb) 3997 { 3998 struct hci_ev_status *rp = data; 3999 struct hci_cp_le_set_per_adv_enable *cp; 4000 struct adv_info *adv = NULL, *n; 4001 u8 per_adv_cnt = 0; 4002 4003 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 4004 4005 if (rp->status) 4006 return rp->status; 4007 4008 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE); 4009 if (!cp) 4010 return rp->status; 4011 4012 hci_dev_lock(hdev); 4013 4014 adv = hci_find_adv_instance(hdev, cp->handle); 4015 4016 if (cp->enable) { 4017 hci_dev_set_flag(hdev, HCI_LE_PER_ADV); 4018 4019 if (adv) 4020 adv->periodic_enabled = true; 4021 } else { 4022 if (adv) 4023 adv->periodic_enabled = false; 4024 4025 /* If just one instance was disabled check if there are 4026 * any other instance enabled before clearing HCI_LE_PER_ADV. 4027 * The current periodic adv instance will be marked as 4028 * disabled once extended advertising is also disabled. 4029 */ 4030 list_for_each_entry_safe(adv, n, &hdev->adv_instances, 4031 list) { 4032 if (adv->periodic && adv->enabled) 4033 per_adv_cnt++; 4034 } 4035 4036 if (per_adv_cnt > 1) 4037 goto unlock; 4038 4039 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV); 4040 } 4041 4042 unlock: 4043 hci_dev_unlock(hdev); 4044 4045 return rp->status; 4046 } 4047 4048 #define HCI_CC_VL(_op, _func, _min, _max) \ 4049 { \ 4050 .op = _op, \ 4051 .func = _func, \ 4052 .min_len = _min, \ 4053 .max_len = _max, \ 4054 } 4055 4056 #define HCI_CC(_op, _func, _len) \ 4057 HCI_CC_VL(_op, _func, _len, _len) 4058 4059 #define HCI_CC_STATUS(_op, _func) \ 4060 HCI_CC(_op, _func, sizeof(struct hci_ev_status)) 4061 4062 static const struct hci_cc { 4063 u16 op; 4064 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb); 4065 u16 min_len; 4066 u16 max_len; 4067 } hci_cc_table[] = { 4068 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel), 4069 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq), 4070 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq), 4071 HCI_CC(HCI_OP_REMOTE_NAME_REQ_CANCEL, hci_cc_remote_name_req_cancel, 4072 sizeof(struct hci_rp_remote_name_req_cancel)), 4073 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery, 4074 sizeof(struct hci_rp_role_discovery)), 4075 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy, 4076 sizeof(struct hci_rp_read_link_policy)), 4077 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy, 4078 sizeof(struct hci_rp_write_link_policy)), 4079 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy, 4080 sizeof(struct hci_rp_read_def_link_policy)), 4081 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY, 4082 hci_cc_write_def_link_policy), 4083 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset), 4084 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key, 4085 sizeof(struct hci_rp_read_stored_link_key)), 4086 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key, 4087 sizeof(struct hci_rp_delete_stored_link_key)), 4088 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name), 4089 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name, 4090 sizeof(struct hci_rp_read_local_name)), 4091 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable), 4092 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode), 4093 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable), 4094 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter), 4095 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev, 4096 sizeof(struct hci_rp_read_class_of_dev)), 4097 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev), 4098 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting, 4099 sizeof(struct hci_rp_read_voice_setting)), 4100 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting), 4101 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac, 4102 sizeof(struct hci_rp_read_num_supported_iac)), 4103 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode), 4104 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support), 4105 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout, 4106 sizeof(struct hci_rp_read_auth_payload_to)), 4107 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout, 4108 sizeof(struct hci_rp_write_auth_payload_to)), 4109 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version, 4110 sizeof(struct hci_rp_read_local_version)), 4111 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands, 4112 sizeof(struct hci_rp_read_local_commands)), 4113 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features, 4114 sizeof(struct hci_rp_read_local_features)), 4115 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features, 4116 sizeof(struct hci_rp_read_local_ext_features)), 4117 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size, 4118 sizeof(struct hci_rp_read_buffer_size)), 4119 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr, 4120 sizeof(struct hci_rp_read_bd_addr)), 4121 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts, 4122 sizeof(struct hci_rp_read_local_pairing_opts)), 4123 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity, 4124 sizeof(struct hci_rp_read_page_scan_activity)), 4125 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY, 4126 hci_cc_write_page_scan_activity), 4127 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type, 4128 sizeof(struct hci_rp_read_page_scan_type)), 4129 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type), 4130 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock, 4131 sizeof(struct hci_rp_read_clock)), 4132 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size, 4133 sizeof(struct hci_rp_read_enc_key_size)), 4134 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power, 4135 sizeof(struct hci_rp_read_inq_rsp_tx_power)), 4136 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING, 4137 hci_cc_read_def_err_data_reporting, 4138 sizeof(struct hci_rp_read_def_err_data_reporting)), 4139 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING, 4140 hci_cc_write_def_err_data_reporting), 4141 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply, 4142 sizeof(struct hci_rp_pin_code_reply)), 4143 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply, 4144 sizeof(struct hci_rp_pin_code_neg_reply)), 4145 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data, 4146 sizeof(struct hci_rp_read_local_oob_data)), 4147 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data, 4148 sizeof(struct hci_rp_read_local_oob_ext_data)), 4149 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size, 4150 sizeof(struct hci_rp_le_read_buffer_size)), 4151 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features, 4152 sizeof(struct hci_rp_le_read_local_features)), 4153 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power, 4154 sizeof(struct hci_rp_le_read_adv_tx_power)), 4155 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply, 4156 sizeof(struct hci_rp_user_confirm_reply)), 4157 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply, 4158 sizeof(struct hci_rp_user_confirm_reply)), 4159 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply, 4160 sizeof(struct hci_rp_user_confirm_reply)), 4161 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply, 4162 sizeof(struct hci_rp_user_confirm_reply)), 4163 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr), 4164 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable), 4165 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param), 4166 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable), 4167 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE, 4168 hci_cc_le_read_accept_list_size, 4169 sizeof(struct hci_rp_le_read_accept_list_size)), 4170 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list), 4171 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST, 4172 hci_cc_le_add_to_accept_list), 4173 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST, 4174 hci_cc_le_del_from_accept_list), 4175 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states, 4176 sizeof(struct hci_rp_le_read_supported_states)), 4177 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len, 4178 sizeof(struct hci_rp_le_read_def_data_len)), 4179 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN, 4180 hci_cc_le_write_def_data_len), 4181 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST, 4182 hci_cc_le_add_to_resolv_list), 4183 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST, 4184 hci_cc_le_del_from_resolv_list), 4185 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST, 4186 hci_cc_le_clear_resolv_list), 4187 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size, 4188 sizeof(struct hci_rp_le_read_resolv_list_size)), 4189 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 4190 hci_cc_le_set_addr_resolution_enable), 4191 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len, 4192 sizeof(struct hci_rp_le_read_max_data_len)), 4193 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED, 4194 hci_cc_write_le_host_supported), 4195 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param), 4196 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi, 4197 sizeof(struct hci_rp_read_rssi)), 4198 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power, 4199 sizeof(struct hci_rp_read_tx_power)), 4200 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode), 4201 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS, 4202 hci_cc_le_set_ext_scan_param), 4203 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE, 4204 hci_cc_le_set_ext_scan_enable), 4205 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy), 4206 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS, 4207 hci_cc_le_read_num_adv_sets, 4208 sizeof(struct hci_rp_le_read_num_supported_adv_sets)), 4209 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE, 4210 hci_cc_le_set_ext_adv_enable), 4211 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR, 4212 hci_cc_le_set_adv_set_random_addr), 4213 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set), 4214 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets), 4215 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param), 4216 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE, 4217 hci_cc_le_set_per_adv_enable), 4218 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power, 4219 sizeof(struct hci_rp_le_read_transmit_power)), 4220 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode), 4221 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2, 4222 sizeof(struct hci_rp_le_read_buffer_size_v2)), 4223 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params, 4224 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE), 4225 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path, 4226 sizeof(struct hci_rp_le_setup_iso_path)), 4227 HCI_CC(HCI_OP_LE_READ_ALL_LOCAL_FEATURES, 4228 hci_cc_le_read_all_local_features, 4229 sizeof(struct hci_rp_le_read_all_local_features)), 4230 }; 4231 4232 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc, 4233 struct sk_buff *skb) 4234 { 4235 void *data; 4236 4237 if (skb->len < cc->min_len) { 4238 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u", 4239 cc->op, skb->len, cc->min_len); 4240 return HCI_ERROR_UNSPECIFIED; 4241 } 4242 4243 /* Just warn if the length is over max_len size it still be possible to 4244 * partially parse the cc so leave to callback to decide if that is 4245 * acceptable. 4246 */ 4247 if (skb->len > cc->max_len) 4248 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u", 4249 cc->op, skb->len, cc->max_len); 4250 4251 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len); 4252 if (!data) 4253 return HCI_ERROR_UNSPECIFIED; 4254 4255 return cc->func(hdev, data, skb); 4256 } 4257 4258 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data, 4259 struct sk_buff *skb, u16 *opcode, u8 *status, 4260 hci_req_complete_t *req_complete, 4261 hci_req_complete_skb_t *req_complete_skb) 4262 { 4263 struct hci_ev_cmd_complete *ev = data; 4264 int i; 4265 4266 *opcode = __le16_to_cpu(ev->opcode); 4267 4268 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode); 4269 4270 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) { 4271 if (hci_cc_table[i].op == *opcode) { 4272 *status = hci_cc_func(hdev, &hci_cc_table[i], skb); 4273 break; 4274 } 4275 } 4276 4277 if (i == ARRAY_SIZE(hci_cc_table)) { 4278 if (!skb->len) { 4279 bt_dev_err(hdev, "Unexpected cc 0x%4.4x with no status", 4280 *opcode); 4281 *status = HCI_ERROR_UNSPECIFIED; 4282 return; 4283 } 4284 4285 /* Unknown opcode, assume byte 0 contains the status, so 4286 * that e.g. __hci_cmd_sync() properly returns errors 4287 * for vendor specific commands send by HCI drivers. 4288 * If a vendor doesn't actually follow this convention we may 4289 * need to introduce a vendor CC table in order to properly set 4290 * the status. 4291 */ 4292 *status = skb->data[0]; 4293 } 4294 4295 handle_cmd_cnt_and_timer(hdev, ev->ncmd); 4296 4297 hci_req_cmd_complete(hdev, *opcode, *status, req_complete, 4298 req_complete_skb); 4299 4300 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) { 4301 bt_dev_err(hdev, 4302 "unexpected event for opcode 0x%4.4x", *opcode); 4303 return; 4304 } 4305 4306 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q)) 4307 queue_work(hdev->workqueue, &hdev->cmd_work); 4308 } 4309 4310 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status) 4311 { 4312 struct hci_cp_le_create_cis *cp; 4313 bool pending = false; 4314 int i; 4315 4316 bt_dev_dbg(hdev, "status 0x%2.2x", status); 4317 4318 if (!status) 4319 return; 4320 4321 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS); 4322 if (!cp) 4323 return; 4324 4325 hci_dev_lock(hdev); 4326 4327 /* Remove connection if command failed */ 4328 for (i = 0; i < cp->num_cis; i++) { 4329 struct hci_conn *conn; 4330 u16 handle; 4331 4332 handle = __le16_to_cpu(cp->cis[i].cis_handle); 4333 4334 conn = hci_conn_hash_lookup_handle(hdev, handle); 4335 if (conn) { 4336 if (test_and_clear_bit(HCI_CONN_CREATE_CIS, 4337 &conn->flags)) 4338 pending = true; 4339 conn->state = BT_CLOSED; 4340 hci_connect_cfm(conn, status); 4341 hci_conn_del(conn); 4342 } 4343 } 4344 cp->num_cis = 0; 4345 4346 if (pending) 4347 hci_le_create_cis_pending(hdev); 4348 4349 hci_dev_unlock(hdev); 4350 } 4351 4352 #define HCI_CS(_op, _func) \ 4353 { \ 4354 .op = _op, \ 4355 .func = _func, \ 4356 } 4357 4358 static const struct hci_cs { 4359 u16 op; 4360 void (*func)(struct hci_dev *hdev, __u8 status); 4361 } hci_cs_table[] = { 4362 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry), 4363 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn), 4364 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect), 4365 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco), 4366 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested), 4367 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt), 4368 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req), 4369 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features), 4370 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES, 4371 hci_cs_read_remote_ext_features), 4372 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn), 4373 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN, 4374 hci_cs_enhanced_setup_sync_conn), 4375 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode), 4376 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode), 4377 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role), 4378 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn), 4379 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features), 4380 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc), 4381 HCI_CS(HCI_OP_LE_SET_PHY, hci_cs_le_set_phy), 4382 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn), 4383 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis), 4384 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big), 4385 HCI_CS(HCI_OP_LE_READ_ALL_REMOTE_FEATURES, 4386 hci_cs_le_read_all_remote_features), 4387 }; 4388 4389 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data, 4390 struct sk_buff *skb, u16 *opcode, u8 *status, 4391 hci_req_complete_t *req_complete, 4392 hci_req_complete_skb_t *req_complete_skb) 4393 { 4394 struct hci_ev_cmd_status *ev = data; 4395 int i; 4396 4397 *opcode = __le16_to_cpu(ev->opcode); 4398 *status = ev->status; 4399 4400 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode); 4401 4402 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) { 4403 if (hci_cs_table[i].op == *opcode) { 4404 hci_cs_table[i].func(hdev, ev->status); 4405 break; 4406 } 4407 } 4408 4409 handle_cmd_cnt_and_timer(hdev, ev->ncmd); 4410 4411 /* Indicate request completion if the command failed. Also, if 4412 * we're not waiting for a special event and we get a success 4413 * command status we should try to flag the request as completed 4414 * (since for this kind of commands there will not be a command 4415 * complete event). 4416 */ 4417 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) { 4418 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete, 4419 req_complete_skb); 4420 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) { 4421 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x", 4422 *opcode); 4423 return; 4424 } 4425 } 4426 4427 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q)) 4428 queue_work(hdev->workqueue, &hdev->cmd_work); 4429 } 4430 4431 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data, 4432 struct sk_buff *skb) 4433 { 4434 struct hci_ev_hardware_error *ev = data; 4435 4436 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code); 4437 4438 hdev->hw_error_code = ev->code; 4439 4440 queue_work(hdev->req_workqueue, &hdev->error_reset); 4441 } 4442 4443 static void hci_role_change_evt(struct hci_dev *hdev, void *data, 4444 struct sk_buff *skb) 4445 { 4446 struct hci_ev_role_change *ev = data; 4447 struct hci_conn *conn; 4448 4449 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4450 4451 hci_dev_lock(hdev); 4452 4453 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4454 if (conn) { 4455 if (!ev->status) 4456 conn->role = ev->role; 4457 4458 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags); 4459 4460 hci_role_switch_cfm(conn, ev->status, ev->role); 4461 } 4462 4463 hci_dev_unlock(hdev); 4464 } 4465 4466 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data, 4467 struct sk_buff *skb) 4468 { 4469 struct hci_ev_num_comp_pkts *ev = data; 4470 int i; 4471 4472 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS, 4473 flex_array_size(ev, handles, ev->num))) 4474 return; 4475 4476 bt_dev_dbg(hdev, "num %d", ev->num); 4477 4478 hci_dev_lock(hdev); 4479 4480 for (i = 0; i < ev->num; i++) { 4481 struct hci_comp_pkts_info *info = &ev->handles[i]; 4482 struct hci_conn *conn; 4483 __u16 handle, count; 4484 unsigned int i; 4485 4486 handle = __le16_to_cpu(info->handle); 4487 count = __le16_to_cpu(info->count); 4488 4489 conn = hci_conn_hash_lookup_handle(hdev, handle); 4490 if (!conn) 4491 continue; 4492 4493 /* Check if there is really enough packets outstanding before 4494 * attempting to decrease the sent counter otherwise it could 4495 * underflow.. 4496 */ 4497 if (conn->sent >= count) { 4498 conn->sent -= count; 4499 } else { 4500 bt_dev_warn(hdev, "hcon %p sent %u < count %u", 4501 conn, conn->sent, count); 4502 conn->sent = 0; 4503 } 4504 4505 for (i = 0; i < count; ++i) 4506 hci_conn_tx_dequeue(conn); 4507 4508 switch (conn->type) { 4509 case ACL_LINK: 4510 hdev->acl_cnt += count; 4511 if (hdev->acl_cnt > hdev->acl_pkts) 4512 hdev->acl_cnt = hdev->acl_pkts; 4513 break; 4514 4515 case LE_LINK: 4516 if (hdev->le_pkts) { 4517 hdev->le_cnt += count; 4518 if (hdev->le_cnt > hdev->le_pkts) 4519 hdev->le_cnt = hdev->le_pkts; 4520 } else { 4521 hdev->acl_cnt += count; 4522 if (hdev->acl_cnt > hdev->acl_pkts) 4523 hdev->acl_cnt = hdev->acl_pkts; 4524 } 4525 break; 4526 4527 case SCO_LINK: 4528 case ESCO_LINK: 4529 hdev->sco_cnt += count; 4530 if (hdev->sco_cnt > hdev->sco_pkts) 4531 hdev->sco_cnt = hdev->sco_pkts; 4532 4533 break; 4534 4535 case CIS_LINK: 4536 case BIS_LINK: 4537 case PA_LINK: 4538 hdev->iso_cnt += count; 4539 if (hdev->iso_cnt > hdev->iso_pkts) 4540 hdev->iso_cnt = hdev->iso_pkts; 4541 break; 4542 4543 default: 4544 bt_dev_err(hdev, "unknown type %d conn %p", 4545 conn->type, conn); 4546 break; 4547 } 4548 } 4549 4550 queue_work(hdev->workqueue, &hdev->tx_work); 4551 4552 hci_dev_unlock(hdev); 4553 } 4554 4555 static void hci_mode_change_evt(struct hci_dev *hdev, void *data, 4556 struct sk_buff *skb) 4557 { 4558 struct hci_ev_mode_change *ev = data; 4559 struct hci_conn *conn; 4560 4561 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4562 4563 hci_dev_lock(hdev); 4564 4565 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4566 if (conn) { 4567 conn->mode = ev->mode; 4568 4569 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND, 4570 &conn->flags)) { 4571 if (conn->mode == HCI_CM_ACTIVE) 4572 set_bit(HCI_CONN_POWER_SAVE, &conn->flags); 4573 else 4574 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags); 4575 } 4576 4577 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) 4578 hci_sco_setup(conn, ev->status); 4579 } 4580 4581 hci_dev_unlock(hdev); 4582 } 4583 4584 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data, 4585 struct sk_buff *skb) 4586 { 4587 struct hci_ev_pin_code_req *ev = data; 4588 struct hci_conn *conn; 4589 4590 bt_dev_dbg(hdev, ""); 4591 4592 hci_dev_lock(hdev); 4593 4594 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4595 if (!conn) 4596 goto unlock; 4597 4598 if (conn->state == BT_CONNECTED) { 4599 hci_conn_hold(conn); 4600 conn->disc_timeout = HCI_PAIRING_TIMEOUT; 4601 hci_conn_drop(conn); 4602 } 4603 4604 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) && 4605 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) { 4606 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY, 4607 sizeof(ev->bdaddr), &ev->bdaddr); 4608 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) { 4609 u8 secure; 4610 4611 if (conn->pending_sec_level == BT_SECURITY_HIGH) 4612 secure = 1; 4613 else 4614 secure = 0; 4615 4616 mgmt_pin_code_request(hdev, &ev->bdaddr, secure); 4617 } 4618 4619 unlock: 4620 hci_dev_unlock(hdev); 4621 } 4622 4623 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len) 4624 { 4625 if (key_type == HCI_LK_CHANGED_COMBINATION) 4626 return; 4627 4628 conn->pin_length = pin_len; 4629 conn->key_type = key_type; 4630 4631 switch (key_type) { 4632 case HCI_LK_LOCAL_UNIT: 4633 case HCI_LK_REMOTE_UNIT: 4634 case HCI_LK_DEBUG_COMBINATION: 4635 return; 4636 case HCI_LK_COMBINATION: 4637 if (pin_len == 16) 4638 conn->pending_sec_level = BT_SECURITY_HIGH; 4639 else 4640 conn->pending_sec_level = BT_SECURITY_MEDIUM; 4641 break; 4642 case HCI_LK_UNAUTH_COMBINATION_P192: 4643 case HCI_LK_UNAUTH_COMBINATION_P256: 4644 conn->pending_sec_level = BT_SECURITY_MEDIUM; 4645 break; 4646 case HCI_LK_AUTH_COMBINATION_P192: 4647 conn->pending_sec_level = BT_SECURITY_HIGH; 4648 break; 4649 case HCI_LK_AUTH_COMBINATION_P256: 4650 conn->pending_sec_level = BT_SECURITY_FIPS; 4651 break; 4652 } 4653 } 4654 4655 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data, 4656 struct sk_buff *skb) 4657 { 4658 struct hci_ev_link_key_req *ev = data; 4659 struct hci_cp_link_key_reply cp; 4660 struct hci_conn *conn; 4661 struct link_key *key; 4662 4663 bt_dev_dbg(hdev, ""); 4664 4665 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 4666 return; 4667 4668 hci_dev_lock(hdev); 4669 4670 key = hci_find_link_key(hdev, &ev->bdaddr); 4671 if (!key) { 4672 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr); 4673 goto not_found; 4674 } 4675 4676 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr); 4677 4678 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4679 if (conn) { 4680 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags); 4681 4682 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 || 4683 key->type == HCI_LK_UNAUTH_COMBINATION_P256) && 4684 conn->auth_type != 0xff && (conn->auth_type & 0x01)) { 4685 bt_dev_dbg(hdev, "ignoring unauthenticated key"); 4686 goto not_found; 4687 } 4688 4689 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 && 4690 (conn->pending_sec_level == BT_SECURITY_HIGH || 4691 conn->pending_sec_level == BT_SECURITY_FIPS)) { 4692 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security"); 4693 goto not_found; 4694 } 4695 4696 conn_set_key(conn, key->type, key->pin_len); 4697 } 4698 4699 bacpy(&cp.bdaddr, &ev->bdaddr); 4700 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE); 4701 4702 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp); 4703 4704 hci_dev_unlock(hdev); 4705 4706 return; 4707 4708 not_found: 4709 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr); 4710 hci_dev_unlock(hdev); 4711 } 4712 4713 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data, 4714 struct sk_buff *skb) 4715 { 4716 struct hci_ev_link_key_notify *ev = data; 4717 struct hci_conn *conn; 4718 struct link_key *key; 4719 bool persistent; 4720 u8 pin_len = 0; 4721 4722 bt_dev_dbg(hdev, ""); 4723 4724 hci_dev_lock(hdev); 4725 4726 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4727 if (!conn) 4728 goto unlock; 4729 4730 /* Ignore NULL link key against CVE-2020-26555 */ 4731 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) { 4732 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR", 4733 &ev->bdaddr); 4734 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 4735 hci_conn_drop(conn); 4736 goto unlock; 4737 } 4738 4739 hci_conn_hold(conn); 4740 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 4741 hci_conn_drop(conn); 4742 4743 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags); 4744 conn_set_key(conn, ev->key_type, conn->pin_length); 4745 4746 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 4747 goto unlock; 4748 4749 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key, 4750 ev->key_type, pin_len, &persistent); 4751 if (!key) 4752 goto unlock; 4753 4754 /* Update connection information since adding the key will have 4755 * fixed up the type in the case of changed combination keys. 4756 */ 4757 if (ev->key_type == HCI_LK_CHANGED_COMBINATION) 4758 conn_set_key(conn, key->type, key->pin_len); 4759 4760 mgmt_new_link_key(hdev, key, persistent); 4761 4762 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag 4763 * is set. If it's not set simply remove the key from the kernel 4764 * list (we've still notified user space about it but with 4765 * store_hint being 0). 4766 */ 4767 if (key->type == HCI_LK_DEBUG_COMBINATION && 4768 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) { 4769 list_del_rcu(&key->list); 4770 kfree_rcu(key, rcu); 4771 goto unlock; 4772 } 4773 4774 if (persistent) 4775 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags); 4776 else 4777 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags); 4778 4779 unlock: 4780 hci_dev_unlock(hdev); 4781 } 4782 4783 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data, 4784 struct sk_buff *skb) 4785 { 4786 struct hci_ev_clock_offset *ev = data; 4787 struct hci_conn *conn; 4788 4789 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4790 4791 hci_dev_lock(hdev); 4792 4793 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4794 if (conn && !ev->status) { 4795 struct inquiry_entry *ie; 4796 4797 ie = hci_inquiry_cache_lookup(hdev, &conn->dst); 4798 if (ie) { 4799 ie->data.clock_offset = ev->clock_offset; 4800 ie->timestamp = jiffies; 4801 } 4802 } 4803 4804 hci_dev_unlock(hdev); 4805 } 4806 4807 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data, 4808 struct sk_buff *skb) 4809 { 4810 struct hci_ev_pkt_type_change *ev = data; 4811 struct hci_conn *conn; 4812 4813 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4814 4815 hci_dev_lock(hdev); 4816 4817 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4818 if (conn && !ev->status) 4819 conn->pkt_type = __le16_to_cpu(ev->pkt_type); 4820 4821 hci_dev_unlock(hdev); 4822 } 4823 4824 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data, 4825 struct sk_buff *skb) 4826 { 4827 struct hci_ev_pscan_rep_mode *ev = data; 4828 struct inquiry_entry *ie; 4829 4830 bt_dev_dbg(hdev, ""); 4831 4832 hci_dev_lock(hdev); 4833 4834 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); 4835 if (ie) { 4836 ie->data.pscan_rep_mode = ev->pscan_rep_mode; 4837 ie->timestamp = jiffies; 4838 } 4839 4840 hci_dev_unlock(hdev); 4841 } 4842 4843 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata, 4844 struct sk_buff *skb) 4845 { 4846 struct hci_ev_inquiry_result_rssi *ev = edata; 4847 struct inquiry_data data; 4848 int i; 4849 4850 bt_dev_dbg(hdev, "num_rsp %d", ev->num); 4851 4852 if (!ev->num) 4853 return; 4854 4855 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) 4856 return; 4857 4858 hci_dev_lock(hdev); 4859 4860 if (skb->len == array_size(ev->num, 4861 sizeof(struct inquiry_info_rssi_pscan))) { 4862 struct inquiry_info_rssi_pscan *info; 4863 4864 for (i = 0; i < ev->num; i++) { 4865 u32 flags; 4866 4867 info = hci_ev_skb_pull(hdev, skb, 4868 HCI_EV_INQUIRY_RESULT_WITH_RSSI, 4869 sizeof(*info)); 4870 if (!info) { 4871 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", 4872 HCI_EV_INQUIRY_RESULT_WITH_RSSI); 4873 goto unlock; 4874 } 4875 4876 bacpy(&data.bdaddr, &info->bdaddr); 4877 data.pscan_rep_mode = info->pscan_rep_mode; 4878 data.pscan_period_mode = info->pscan_period_mode; 4879 data.pscan_mode = info->pscan_mode; 4880 memcpy(data.dev_class, info->dev_class, 3); 4881 data.clock_offset = info->clock_offset; 4882 data.rssi = info->rssi; 4883 data.ssp_mode = 0x00; 4884 4885 flags = hci_inquiry_cache_update(hdev, &data, false); 4886 4887 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 4888 info->dev_class, info->rssi, 4889 flags, NULL, 0, NULL, 0, 0); 4890 } 4891 } else if (skb->len == array_size(ev->num, 4892 sizeof(struct inquiry_info_rssi))) { 4893 struct inquiry_info_rssi *info; 4894 4895 for (i = 0; i < ev->num; i++) { 4896 u32 flags; 4897 4898 info = hci_ev_skb_pull(hdev, skb, 4899 HCI_EV_INQUIRY_RESULT_WITH_RSSI, 4900 sizeof(*info)); 4901 if (!info) { 4902 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", 4903 HCI_EV_INQUIRY_RESULT_WITH_RSSI); 4904 goto unlock; 4905 } 4906 4907 bacpy(&data.bdaddr, &info->bdaddr); 4908 data.pscan_rep_mode = info->pscan_rep_mode; 4909 data.pscan_period_mode = info->pscan_period_mode; 4910 data.pscan_mode = 0x00; 4911 memcpy(data.dev_class, info->dev_class, 3); 4912 data.clock_offset = info->clock_offset; 4913 data.rssi = info->rssi; 4914 data.ssp_mode = 0x00; 4915 4916 flags = hci_inquiry_cache_update(hdev, &data, false); 4917 4918 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 4919 info->dev_class, info->rssi, 4920 flags, NULL, 0, NULL, 0, 0); 4921 } 4922 } else { 4923 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", 4924 HCI_EV_INQUIRY_RESULT_WITH_RSSI); 4925 } 4926 unlock: 4927 hci_dev_unlock(hdev); 4928 } 4929 4930 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data, 4931 struct sk_buff *skb) 4932 { 4933 struct hci_ev_remote_ext_features *ev = data; 4934 struct hci_conn *conn; 4935 4936 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4937 4938 hci_dev_lock(hdev); 4939 4940 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4941 if (!conn) 4942 goto unlock; 4943 4944 if (ev->page < HCI_MAX_PAGES) 4945 memcpy(conn->features[ev->page], ev->features, 8); 4946 4947 if (!ev->status && ev->page == 0x01) { 4948 struct inquiry_entry *ie; 4949 4950 ie = hci_inquiry_cache_lookup(hdev, &conn->dst); 4951 if (ie) 4952 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP); 4953 4954 if (ev->features[0] & LMP_HOST_SSP) { 4955 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 4956 } else { 4957 /* It is mandatory by the Bluetooth specification that 4958 * Extended Inquiry Results are only used when Secure 4959 * Simple Pairing is enabled, but some devices violate 4960 * this. 4961 * 4962 * To make these devices work, the internal SSP 4963 * enabled flag needs to be cleared if the remote host 4964 * features do not indicate SSP support */ 4965 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 4966 } 4967 4968 if (ev->features[0] & LMP_HOST_SC) 4969 set_bit(HCI_CONN_SC_ENABLED, &conn->flags); 4970 } 4971 4972 if (conn->state != BT_CONFIG) 4973 goto unlock; 4974 4975 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) { 4976 struct hci_cp_remote_name_req cp; 4977 memset(&cp, 0, sizeof(cp)); 4978 bacpy(&cp.bdaddr, &conn->dst); 4979 cp.pscan_rep_mode = 0x02; 4980 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); 4981 } else { 4982 mgmt_device_connected(hdev, conn, NULL, 0); 4983 } 4984 4985 if (!hci_outgoing_auth_needed(hdev, conn)) { 4986 conn->state = BT_CONNECTED; 4987 hci_connect_cfm(conn, ev->status); 4988 hci_conn_drop(conn); 4989 } 4990 4991 unlock: 4992 hci_dev_unlock(hdev); 4993 } 4994 4995 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data, 4996 struct sk_buff *skb) 4997 { 4998 struct hci_ev_sync_conn_complete *ev = data; 4999 struct hci_conn *conn; 5000 u8 status = ev->status; 5001 5002 switch (ev->link_type) { 5003 case SCO_LINK: 5004 case ESCO_LINK: 5005 break; 5006 default: 5007 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type 5008 * for HCI_Synchronous_Connection_Complete is limited to 5009 * either SCO or eSCO 5010 */ 5011 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type"); 5012 return; 5013 } 5014 5015 bt_dev_dbg(hdev, "status 0x%2.2x", status); 5016 5017 hci_dev_lock(hdev); 5018 hci_store_wake_reason(hdev, &ev->bdaddr, BDADDR_BREDR); 5019 5020 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr); 5021 if (!conn) { 5022 if (ev->link_type == ESCO_LINK) 5023 goto unlock; 5024 5025 /* When the link type in the event indicates SCO connection 5026 * and lookup of the connection object fails, then check 5027 * if an eSCO connection object exists. 5028 * 5029 * The core limits the synchronous connections to either 5030 * SCO or eSCO. The eSCO connection is preferred and tried 5031 * to be setup first and until successfully established, 5032 * the link type will be hinted as eSCO. 5033 */ 5034 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr); 5035 if (!conn) 5036 goto unlock; 5037 } 5038 5039 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection. 5040 * Processing it more than once per connection can corrupt kernel memory. 5041 * 5042 * As the connection handle is set here for the first time, it indicates 5043 * whether the connection is already set up. 5044 */ 5045 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { 5046 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection"); 5047 goto unlock; 5048 } 5049 5050 switch (status) { 5051 case 0x00: 5052 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle)); 5053 if (status) { 5054 conn->state = BT_CLOSED; 5055 break; 5056 } 5057 5058 conn->state = BT_CONNECTED; 5059 conn->type = ev->link_type; 5060 5061 hci_debugfs_create_conn(conn); 5062 hci_conn_add_sysfs(conn); 5063 break; 5064 5065 case 0x10: /* Connection Accept Timeout */ 5066 case 0x0d: /* Connection Rejected due to Limited Resources */ 5067 case 0x11: /* Unsupported Feature or Parameter Value */ 5068 case 0x1c: /* SCO interval rejected */ 5069 case 0x1a: /* Unsupported Remote Feature */ 5070 case 0x1e: /* Invalid LMP Parameters */ 5071 case 0x1f: /* Unspecified error */ 5072 case 0x20: /* Unsupported LMP Parameter value */ 5073 if (conn->out) { 5074 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | 5075 (hdev->esco_type & EDR_ESCO_MASK); 5076 if (hci_setup_sync(conn, conn->parent->handle)) 5077 goto unlock; 5078 } 5079 fallthrough; 5080 5081 default: 5082 conn->state = BT_CLOSED; 5083 break; 5084 } 5085 5086 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode); 5087 /* Notify only in case of SCO over HCI transport data path which 5088 * is zero and non-zero value shall be non-HCI transport data path 5089 */ 5090 if (conn->codec.data_path == 0 && hdev->notify) { 5091 switch (ev->air_mode) { 5092 case 0x02: 5093 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD); 5094 break; 5095 case 0x03: 5096 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP); 5097 break; 5098 } 5099 } 5100 5101 hci_connect_cfm(conn, status); 5102 if (status) 5103 hci_conn_del(conn); 5104 5105 unlock: 5106 hci_dev_unlock(hdev); 5107 } 5108 5109 static inline size_t eir_get_length(u8 *eir, size_t eir_len) 5110 { 5111 size_t parsed = 0; 5112 5113 while (parsed < eir_len) { 5114 u8 field_len = eir[0]; 5115 5116 if (field_len == 0) 5117 return parsed; 5118 5119 parsed += field_len + 1; 5120 eir += field_len + 1; 5121 } 5122 5123 return eir_len; 5124 } 5125 5126 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata, 5127 struct sk_buff *skb) 5128 { 5129 struct hci_ev_ext_inquiry_result *ev = edata; 5130 struct inquiry_data data; 5131 size_t eir_len; 5132 int i; 5133 5134 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT, 5135 flex_array_size(ev, info, ev->num))) 5136 return; 5137 5138 bt_dev_dbg(hdev, "num %d", ev->num); 5139 5140 if (!ev->num) 5141 return; 5142 5143 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) 5144 return; 5145 5146 hci_dev_lock(hdev); 5147 5148 for (i = 0; i < ev->num; i++) { 5149 struct extended_inquiry_info *info = &ev->info[i]; 5150 u32 flags; 5151 bool name_known; 5152 5153 bacpy(&data.bdaddr, &info->bdaddr); 5154 data.pscan_rep_mode = info->pscan_rep_mode; 5155 data.pscan_period_mode = info->pscan_period_mode; 5156 data.pscan_mode = 0x00; 5157 memcpy(data.dev_class, info->dev_class, 3); 5158 data.clock_offset = info->clock_offset; 5159 data.rssi = info->rssi; 5160 data.ssp_mode = 0x01; 5161 5162 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5163 name_known = eir_get_data(info->data, 5164 sizeof(info->data), 5165 EIR_NAME_COMPLETE, NULL); 5166 else 5167 name_known = true; 5168 5169 flags = hci_inquiry_cache_update(hdev, &data, name_known); 5170 5171 eir_len = eir_get_length(info->data, sizeof(info->data)); 5172 5173 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 5174 info->dev_class, info->rssi, 5175 flags, info->data, eir_len, NULL, 0, 0); 5176 } 5177 5178 hci_dev_unlock(hdev); 5179 } 5180 5181 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data, 5182 struct sk_buff *skb) 5183 { 5184 struct hci_ev_key_refresh_complete *ev = data; 5185 struct hci_conn *conn; 5186 5187 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status, 5188 __le16_to_cpu(ev->handle)); 5189 5190 hci_dev_lock(hdev); 5191 5192 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 5193 if (!conn) 5194 goto unlock; 5195 5196 /* For BR/EDR the necessary steps are taken through the 5197 * auth_complete event. 5198 */ 5199 if (conn->type != LE_LINK) 5200 goto unlock; 5201 5202 if (!ev->status) 5203 conn->sec_level = conn->pending_sec_level; 5204 5205 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 5206 5207 if (ev->status && conn->state == BT_CONNECTED) { 5208 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 5209 hci_conn_drop(conn); 5210 goto unlock; 5211 } 5212 5213 if (conn->state == BT_CONFIG) { 5214 if (!ev->status) 5215 conn->state = BT_CONNECTED; 5216 5217 hci_connect_cfm(conn, ev->status); 5218 hci_conn_drop(conn); 5219 } else { 5220 hci_auth_cfm(conn, ev->status); 5221 5222 hci_conn_hold(conn); 5223 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 5224 hci_conn_drop(conn); 5225 } 5226 5227 unlock: 5228 hci_dev_unlock(hdev); 5229 } 5230 5231 static u8 hci_get_auth_req(struct hci_conn *conn) 5232 { 5233 /* If remote requests no-bonding follow that lead */ 5234 if (conn->remote_auth == HCI_AT_NO_BONDING || 5235 conn->remote_auth == HCI_AT_NO_BONDING_MITM) 5236 return conn->remote_auth | (conn->auth_type & 0x01); 5237 5238 /* If both remote and local have enough IO capabilities, require 5239 * MITM protection 5240 */ 5241 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT && 5242 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) 5243 return conn->remote_auth | 0x01; 5244 5245 /* No MITM protection possible so ignore remote requirement */ 5246 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01); 5247 } 5248 5249 static u8 bredr_oob_data_present(struct hci_conn *conn) 5250 { 5251 struct hci_dev *hdev = conn->hdev; 5252 struct oob_data *data; 5253 5254 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR); 5255 if (!data) 5256 return 0x00; 5257 5258 if (bredr_sc_enabled(hdev)) { 5259 /* When Secure Connections is enabled, then just 5260 * return the present value stored with the OOB 5261 * data. The stored value contains the right present 5262 * information. However it can only be trusted when 5263 * not in Secure Connection Only mode. 5264 */ 5265 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY)) 5266 return data->present; 5267 5268 /* When Secure Connections Only mode is enabled, then 5269 * the P-256 values are required. If they are not 5270 * available, then do not declare that OOB data is 5271 * present. 5272 */ 5273 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) || 5274 !crypto_memneq(data->hash256, ZERO_KEY, 16)) 5275 return 0x00; 5276 5277 return 0x02; 5278 } 5279 5280 /* When Secure Connections is not enabled or actually 5281 * not supported by the hardware, then check that if 5282 * P-192 data values are present. 5283 */ 5284 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) || 5285 !crypto_memneq(data->hash192, ZERO_KEY, 16)) 5286 return 0x00; 5287 5288 return 0x01; 5289 } 5290 5291 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data, 5292 struct sk_buff *skb) 5293 { 5294 struct hci_ev_io_capa_request *ev = data; 5295 struct hci_conn *conn; 5296 5297 bt_dev_dbg(hdev, ""); 5298 5299 hci_dev_lock(hdev); 5300 5301 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5302 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) 5303 goto unlock; 5304 5305 /* Assume remote supports SSP since it has triggered this event */ 5306 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 5307 5308 hci_conn_hold(conn); 5309 5310 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 5311 goto unlock; 5312 5313 /* Allow pairing if we're pairable, the initiators of the 5314 * pairing or if the remote is not requesting bonding. 5315 */ 5316 if (hci_dev_test_flag(hdev, HCI_BONDABLE) || 5317 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) || 5318 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) { 5319 struct hci_cp_io_capability_reply cp; 5320 5321 bacpy(&cp.bdaddr, &ev->bdaddr); 5322 /* Change the IO capability from KeyboardDisplay 5323 * to DisplayYesNo as it is not supported by BT spec. */ 5324 cp.capability = (conn->io_capability == 0x04) ? 5325 HCI_IO_DISPLAY_YESNO : conn->io_capability; 5326 5327 /* If we are initiators, there is no remote information yet */ 5328 if (conn->remote_auth == 0xff) { 5329 /* Request MITM protection if our IO caps allow it 5330 * except for the no-bonding case. 5331 */ 5332 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT && 5333 conn->auth_type != HCI_AT_NO_BONDING) 5334 conn->auth_type |= 0x01; 5335 } else { 5336 conn->auth_type = hci_get_auth_req(conn); 5337 } 5338 5339 /* If we're not bondable, force one of the non-bondable 5340 * authentication requirement values. 5341 */ 5342 if (!hci_dev_test_flag(hdev, HCI_BONDABLE)) 5343 conn->auth_type &= HCI_AT_NO_BONDING_MITM; 5344 5345 cp.authentication = conn->auth_type; 5346 cp.oob_data = bredr_oob_data_present(conn); 5347 5348 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY, 5349 sizeof(cp), &cp); 5350 } else { 5351 struct hci_cp_io_capability_neg_reply cp; 5352 5353 bacpy(&cp.bdaddr, &ev->bdaddr); 5354 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED; 5355 5356 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY, 5357 sizeof(cp), &cp); 5358 } 5359 5360 unlock: 5361 hci_dev_unlock(hdev); 5362 } 5363 5364 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data, 5365 struct sk_buff *skb) 5366 { 5367 struct hci_ev_io_capa_reply *ev = data; 5368 struct hci_conn *conn; 5369 5370 bt_dev_dbg(hdev, ""); 5371 5372 hci_dev_lock(hdev); 5373 5374 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5375 if (!conn) 5376 goto unlock; 5377 5378 conn->remote_cap = ev->capability; 5379 conn->remote_auth = ev->authentication; 5380 5381 unlock: 5382 hci_dev_unlock(hdev); 5383 } 5384 5385 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data, 5386 struct sk_buff *skb) 5387 { 5388 struct hci_ev_user_confirm_req *ev = data; 5389 int loc_mitm, rem_mitm, confirm_hint = 0; 5390 struct hci_conn *conn; 5391 5392 bt_dev_dbg(hdev, ""); 5393 5394 hci_dev_lock(hdev); 5395 5396 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 5397 goto unlock; 5398 5399 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5400 if (!conn) 5401 goto unlock; 5402 5403 loc_mitm = (conn->auth_type & 0x01); 5404 rem_mitm = (conn->remote_auth & 0x01); 5405 5406 /* If we require MITM but the remote device can't provide that 5407 * (it has NoInputNoOutput) then reject the confirmation 5408 * request. We check the security level here since it doesn't 5409 * necessarily match conn->auth_type. 5410 */ 5411 if (conn->pending_sec_level > BT_SECURITY_MEDIUM && 5412 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) { 5413 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM"); 5414 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY, 5415 sizeof(ev->bdaddr), &ev->bdaddr); 5416 goto unlock; 5417 } 5418 5419 /* If no side requires MITM protection; use JUST_CFM method */ 5420 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) && 5421 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) { 5422 5423 /* If we're not the initiator of request authorization and the 5424 * local IO capability is not NoInputNoOutput, use JUST_WORKS 5425 * method (mgmt_user_confirm with confirm_hint set to 1). 5426 */ 5427 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && 5428 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) { 5429 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor"); 5430 confirm_hint = 1; 5431 goto confirm; 5432 } 5433 5434 /* If there already exists link key in local host, leave the 5435 * decision to user space since the remote device could be 5436 * legitimate or malicious. 5437 */ 5438 if (hci_find_link_key(hdev, &ev->bdaddr)) { 5439 bt_dev_dbg(hdev, "Local host already has link key"); 5440 confirm_hint = 1; 5441 goto confirm; 5442 } 5443 5444 BT_DBG("Auto-accept of user confirmation with %ums delay", 5445 hdev->auto_accept_delay); 5446 5447 if (hdev->auto_accept_delay > 0) { 5448 int delay = msecs_to_jiffies(hdev->auto_accept_delay); 5449 queue_delayed_work(conn->hdev->workqueue, 5450 &conn->auto_accept_work, delay); 5451 goto unlock; 5452 } 5453 5454 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, 5455 sizeof(ev->bdaddr), &ev->bdaddr); 5456 goto unlock; 5457 } 5458 5459 confirm: 5460 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0, 5461 le32_to_cpu(ev->passkey), confirm_hint); 5462 5463 unlock: 5464 hci_dev_unlock(hdev); 5465 } 5466 5467 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data, 5468 struct sk_buff *skb) 5469 { 5470 struct hci_ev_user_passkey_req *ev = data; 5471 5472 bt_dev_dbg(hdev, ""); 5473 5474 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5475 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0); 5476 } 5477 5478 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data, 5479 struct sk_buff *skb) 5480 { 5481 struct hci_ev_user_passkey_notify *ev = data; 5482 struct hci_conn *conn; 5483 5484 bt_dev_dbg(hdev, ""); 5485 5486 hci_dev_lock(hdev); 5487 5488 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5489 if (!conn) 5490 goto unlock; 5491 5492 conn->passkey_notify = __le32_to_cpu(ev->passkey); 5493 conn->passkey_entered = 0; 5494 5495 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5496 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, 5497 conn->dst_type, conn->passkey_notify, 5498 conn->passkey_entered); 5499 5500 unlock: 5501 hci_dev_unlock(hdev); 5502 } 5503 5504 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data, 5505 struct sk_buff *skb) 5506 { 5507 struct hci_ev_keypress_notify *ev = data; 5508 struct hci_conn *conn; 5509 5510 bt_dev_dbg(hdev, ""); 5511 5512 hci_dev_lock(hdev); 5513 5514 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5515 if (!conn) 5516 goto unlock; 5517 5518 switch (ev->type) { 5519 case HCI_KEYPRESS_STARTED: 5520 conn->passkey_entered = 0; 5521 goto unlock; 5522 5523 case HCI_KEYPRESS_ENTERED: 5524 conn->passkey_entered++; 5525 break; 5526 5527 case HCI_KEYPRESS_ERASED: 5528 conn->passkey_entered--; 5529 break; 5530 5531 case HCI_KEYPRESS_CLEARED: 5532 conn->passkey_entered = 0; 5533 break; 5534 5535 case HCI_KEYPRESS_COMPLETED: 5536 goto unlock; 5537 } 5538 5539 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5540 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, 5541 conn->dst_type, conn->passkey_notify, 5542 conn->passkey_entered); 5543 5544 unlock: 5545 hci_dev_unlock(hdev); 5546 } 5547 5548 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data, 5549 struct sk_buff *skb) 5550 { 5551 struct hci_ev_simple_pair_complete *ev = data; 5552 struct hci_conn *conn; 5553 5554 bt_dev_dbg(hdev, ""); 5555 5556 hci_dev_lock(hdev); 5557 5558 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5559 if (!conn || !hci_conn_ssp_enabled(conn)) 5560 goto unlock; 5561 5562 /* Reset the authentication requirement to unknown */ 5563 conn->remote_auth = 0xff; 5564 5565 /* To avoid duplicate auth_failed events to user space we check 5566 * the HCI_CONN_AUTH_PEND flag which will be set if we 5567 * initiated the authentication. A traditional auth_complete 5568 * event gets always produced as initiator and is also mapped to 5569 * the mgmt_auth_failed event */ 5570 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status) 5571 mgmt_auth_failed(conn, ev->status); 5572 5573 hci_conn_drop(conn); 5574 5575 unlock: 5576 hci_dev_unlock(hdev); 5577 } 5578 5579 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data, 5580 struct sk_buff *skb) 5581 { 5582 struct hci_ev_remote_host_features *ev = data; 5583 struct inquiry_entry *ie; 5584 struct hci_conn *conn; 5585 5586 bt_dev_dbg(hdev, ""); 5587 5588 hci_dev_lock(hdev); 5589 5590 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5591 if (conn) 5592 memcpy(conn->features[1], ev->features, 8); 5593 5594 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); 5595 if (ie) 5596 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP); 5597 5598 hci_dev_unlock(hdev); 5599 } 5600 5601 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata, 5602 struct sk_buff *skb) 5603 { 5604 struct hci_ev_remote_oob_data_request *ev = edata; 5605 struct oob_data *data; 5606 5607 bt_dev_dbg(hdev, ""); 5608 5609 hci_dev_lock(hdev); 5610 5611 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 5612 goto unlock; 5613 5614 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR); 5615 if (!data) { 5616 struct hci_cp_remote_oob_data_neg_reply cp; 5617 5618 bacpy(&cp.bdaddr, &ev->bdaddr); 5619 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY, 5620 sizeof(cp), &cp); 5621 goto unlock; 5622 } 5623 5624 if (bredr_sc_enabled(hdev)) { 5625 struct hci_cp_remote_oob_ext_data_reply cp; 5626 5627 bacpy(&cp.bdaddr, &ev->bdaddr); 5628 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) { 5629 memset(cp.hash192, 0, sizeof(cp.hash192)); 5630 memset(cp.rand192, 0, sizeof(cp.rand192)); 5631 } else { 5632 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192)); 5633 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192)); 5634 } 5635 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256)); 5636 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256)); 5637 5638 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY, 5639 sizeof(cp), &cp); 5640 } else { 5641 struct hci_cp_remote_oob_data_reply cp; 5642 5643 bacpy(&cp.bdaddr, &ev->bdaddr); 5644 memcpy(cp.hash, data->hash192, sizeof(cp.hash)); 5645 memcpy(cp.rand, data->rand192, sizeof(cp.rand)); 5646 5647 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY, 5648 sizeof(cp), &cp); 5649 } 5650 5651 unlock: 5652 hci_dev_unlock(hdev); 5653 } 5654 5655 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr, 5656 u8 bdaddr_type, bdaddr_t *local_rpa) 5657 { 5658 if (conn->out) { 5659 conn->dst_type = bdaddr_type; 5660 conn->resp_addr_type = bdaddr_type; 5661 bacpy(&conn->resp_addr, bdaddr); 5662 5663 /* Check if the controller has set a Local RPA then it must be 5664 * used instead or hdev->rpa. 5665 */ 5666 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) { 5667 conn->init_addr_type = ADDR_LE_DEV_RANDOM; 5668 bacpy(&conn->init_addr, local_rpa); 5669 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) { 5670 conn->init_addr_type = ADDR_LE_DEV_RANDOM; 5671 bacpy(&conn->init_addr, &conn->hdev->rpa); 5672 } else { 5673 hci_copy_identity_address(conn->hdev, &conn->init_addr, 5674 &conn->init_addr_type); 5675 } 5676 } else { 5677 conn->resp_addr_type = conn->hdev->adv_addr_type; 5678 /* Check if the controller has set a Local RPA then it must be 5679 * used instead or hdev->rpa. 5680 */ 5681 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) { 5682 conn->resp_addr_type = ADDR_LE_DEV_RANDOM; 5683 bacpy(&conn->resp_addr, local_rpa); 5684 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) { 5685 /* In case of ext adv, resp_addr will be updated in 5686 * Adv Terminated event. 5687 */ 5688 if (!ext_adv_capable(conn->hdev)) 5689 bacpy(&conn->resp_addr, 5690 &conn->hdev->random_addr); 5691 } else { 5692 bacpy(&conn->resp_addr, &conn->hdev->bdaddr); 5693 } 5694 5695 conn->init_addr_type = bdaddr_type; 5696 bacpy(&conn->init_addr, bdaddr); 5697 5698 /* For incoming connections, set the default minimum 5699 * and maximum connection interval. They will be used 5700 * to check if the parameters are in range and if not 5701 * trigger the connection update procedure. 5702 */ 5703 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval; 5704 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval; 5705 } 5706 } 5707 5708 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status, 5709 bdaddr_t *bdaddr, u8 bdaddr_type, 5710 bdaddr_t *local_rpa, u8 role, u16 handle, 5711 u16 interval, u16 latency, 5712 u16 supervision_timeout) 5713 { 5714 struct hci_conn_params *params; 5715 struct hci_conn *conn; 5716 struct smp_irk *irk; 5717 u8 addr_type; 5718 int err; 5719 5720 hci_dev_lock(hdev); 5721 hci_store_wake_reason(hdev, bdaddr, bdaddr_type); 5722 5723 /* All controllers implicitly stop advertising in the event of a 5724 * connection, so ensure that the state bit is cleared. 5725 */ 5726 hci_dev_clear_flag(hdev, HCI_LE_ADV); 5727 5728 /* Check for existing connection: 5729 * 5730 * 1. If it doesn't exist then use the role to create a new object. 5731 * 2. If it does exist confirm that it is connecting/BT_CONNECT in case 5732 * of initiator/master role since there could be a collision where 5733 * either side is attempting to connect or something like a fuzzing 5734 * testing is trying to play tricks to destroy the hcon object before 5735 * it even attempts to connect (e.g. hcon->state == BT_OPEN). 5736 */ 5737 conn = hci_conn_hash_lookup_role(hdev, LE_LINK, role, bdaddr); 5738 if (!conn || 5739 (conn->role == HCI_ROLE_MASTER && conn->state != BT_CONNECT)) { 5740 /* In case of error status and there is no connection pending 5741 * just unlock as there is nothing to cleanup. 5742 */ 5743 if (status) 5744 goto unlock; 5745 5746 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, bdaddr_type, 5747 role); 5748 if (IS_ERR(conn)) { 5749 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 5750 goto unlock; 5751 } 5752 5753 /* If we didn't have a hci_conn object previously 5754 * but we're in central role this must be something 5755 * initiated using an accept list. Since accept list based 5756 * connections are not "first class citizens" we don't 5757 * have full tracking of them. Therefore, we go ahead 5758 * with a "best effort" approach of determining the 5759 * initiator address based on the HCI_PRIVACY flag. 5760 */ 5761 if (conn->out) { 5762 conn->resp_addr_type = bdaddr_type; 5763 bacpy(&conn->resp_addr, bdaddr); 5764 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) { 5765 conn->init_addr_type = ADDR_LE_DEV_RANDOM; 5766 bacpy(&conn->init_addr, &hdev->rpa); 5767 } else { 5768 hci_copy_identity_address(hdev, 5769 &conn->init_addr, 5770 &conn->init_addr_type); 5771 } 5772 } 5773 } else { 5774 cancel_delayed_work(&conn->le_conn_timeout); 5775 } 5776 5777 /* The HCI_LE_Connection_Complete event is only sent once per connection. 5778 * Processing it more than once per connection can corrupt kernel memory. 5779 * 5780 * As the connection handle is set here for the first time, it indicates 5781 * whether the connection is already set up. 5782 */ 5783 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { 5784 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection"); 5785 goto unlock; 5786 } 5787 5788 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa); 5789 5790 /* Lookup the identity address from the stored connection 5791 * address and address type. 5792 * 5793 * When establishing connections to an identity address, the 5794 * connection procedure will store the resolvable random 5795 * address first. Now if it can be converted back into the 5796 * identity address, start using the identity address from 5797 * now on. 5798 */ 5799 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type); 5800 if (irk) { 5801 bacpy(&conn->dst, &irk->bdaddr); 5802 conn->dst_type = irk->addr_type; 5803 } 5804 5805 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL); 5806 5807 /* All connection failure handling is taken care of by the 5808 * hci_conn_failed function which is triggered by the HCI 5809 * request completion callbacks used for connecting. 5810 */ 5811 if (status || hci_conn_set_handle(conn, handle)) 5812 goto unlock; 5813 5814 /* Drop the connection if it has been aborted */ 5815 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) { 5816 hci_conn_drop(conn); 5817 goto unlock; 5818 } 5819 5820 if (conn->dst_type == ADDR_LE_DEV_PUBLIC) 5821 addr_type = BDADDR_LE_PUBLIC; 5822 else 5823 addr_type = BDADDR_LE_RANDOM; 5824 5825 /* Drop the connection if the device is blocked */ 5826 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) { 5827 hci_conn_drop(conn); 5828 goto unlock; 5829 } 5830 5831 mgmt_device_connected(hdev, conn, NULL, 0); 5832 5833 conn->sec_level = BT_SECURITY_LOW; 5834 conn->state = BT_CONFIG; 5835 5836 /* Store current advertising instance as connection advertising instance 5837 * when software rotation is in use so it can be re-enabled when 5838 * disconnected. 5839 */ 5840 if (!ext_adv_capable(hdev)) 5841 conn->adv_instance = hdev->cur_adv_instance; 5842 5843 conn->le_conn_interval = interval; 5844 conn->le_conn_latency = latency; 5845 conn->le_supv_timeout = supervision_timeout; 5846 5847 hci_debugfs_create_conn(conn); 5848 hci_conn_add_sysfs(conn); 5849 5850 err = hci_le_read_remote_features(conn); 5851 if (err) { 5852 conn->state = BT_CONNECTED; 5853 hci_connect_cfm(conn, status); 5854 } 5855 5856 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, 5857 conn->dst_type); 5858 if (params) { 5859 hci_pend_le_list_del_init(params); 5860 if (params->conn) { 5861 hci_conn_drop(params->conn); 5862 hci_conn_put(params->conn); 5863 params->conn = NULL; 5864 } 5865 } 5866 5867 unlock: 5868 hci_update_passive_scan(hdev); 5869 hci_dev_unlock(hdev); 5870 } 5871 5872 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data, 5873 struct sk_buff *skb) 5874 { 5875 struct hci_ev_le_conn_complete *ev = data; 5876 5877 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 5878 5879 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type, 5880 NULL, ev->role, le16_to_cpu(ev->handle), 5881 le16_to_cpu(ev->interval), 5882 le16_to_cpu(ev->latency), 5883 le16_to_cpu(ev->supervision_timeout)); 5884 } 5885 5886 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data, 5887 struct sk_buff *skb) 5888 { 5889 struct hci_ev_le_enh_conn_complete *ev = data; 5890 5891 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 5892 5893 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type, 5894 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle), 5895 le16_to_cpu(ev->interval), 5896 le16_to_cpu(ev->latency), 5897 le16_to_cpu(ev->supervision_timeout)); 5898 } 5899 5900 static void hci_le_pa_sync_lost_evt(struct hci_dev *hdev, void *data, 5901 struct sk_buff *skb) 5902 { 5903 struct hci_ev_le_pa_sync_lost *ev = data; 5904 u16 handle = le16_to_cpu(ev->handle); 5905 struct hci_conn *conn; 5906 5907 bt_dev_dbg(hdev, "sync handle 0x%4.4x", handle); 5908 5909 hci_dev_lock(hdev); 5910 5911 /* Delete the pa sync connection */ 5912 conn = hci_conn_hash_lookup_pa_sync_handle(hdev, handle); 5913 if (conn) { 5914 clear_bit(HCI_CONN_BIG_SYNC, &conn->flags); 5915 clear_bit(HCI_CONN_PA_SYNC, &conn->flags); 5916 hci_disconn_cfm(conn, HCI_ERROR_REMOTE_USER_TERM); 5917 hci_conn_del(conn); 5918 } 5919 5920 hci_dev_unlock(hdev); 5921 } 5922 5923 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data, 5924 struct sk_buff *skb) 5925 { 5926 struct hci_evt_le_ext_adv_set_term *ev = data; 5927 struct hci_conn *conn; 5928 struct adv_info *adv, *n; 5929 5930 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 5931 5932 /* The Bluetooth Core 5.3 specification clearly states that this event 5933 * shall not be sent when the Host disables the advertising set. So in 5934 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event. 5935 * 5936 * When the Host disables an advertising set, all cleanup is done via 5937 * its command callback and not needed to be duplicated here. 5938 */ 5939 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) { 5940 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event"); 5941 return; 5942 } 5943 5944 hci_dev_lock(hdev); 5945 5946 adv = hci_find_adv_instance(hdev, ev->handle); 5947 5948 if (ev->status) { 5949 if (!adv) 5950 goto unlock; 5951 5952 /* Remove advertising as it has been terminated */ 5953 hci_remove_adv_instance(hdev, ev->handle); 5954 mgmt_advertising_removed(NULL, hdev, ev->handle); 5955 5956 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { 5957 if (adv->enabled) 5958 goto unlock; 5959 } 5960 5961 /* We are no longer advertising, clear HCI_LE_ADV */ 5962 hci_dev_clear_flag(hdev, HCI_LE_ADV); 5963 goto unlock; 5964 } 5965 5966 if (adv) 5967 adv->enabled = false; 5968 5969 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle)); 5970 if (conn) { 5971 /* Store handle in the connection so the correct advertising 5972 * instance can be re-enabled when disconnected. 5973 */ 5974 conn->adv_instance = ev->handle; 5975 5976 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM || 5977 bacmp(&conn->resp_addr, BDADDR_ANY)) 5978 goto unlock; 5979 5980 if (!ev->handle) { 5981 bacpy(&conn->resp_addr, &hdev->random_addr); 5982 goto unlock; 5983 } 5984 5985 if (adv) 5986 bacpy(&conn->resp_addr, &adv->random_addr); 5987 } 5988 5989 unlock: 5990 hci_dev_unlock(hdev); 5991 } 5992 5993 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle) 5994 { 5995 struct hci_cp_le_pa_term_sync cp; 5996 5997 memset(&cp, 0, sizeof(cp)); 5998 cp.handle = handle; 5999 6000 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp); 6001 } 6002 6003 static void hci_le_past_received_evt(struct hci_dev *hdev, void *data, 6004 struct sk_buff *skb) 6005 { 6006 struct hci_ev_le_past_received *ev = data; 6007 int mask = hdev->link_mode; 6008 __u8 flags = 0; 6009 struct hci_conn *pa_sync, *conn; 6010 6011 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6012 6013 hci_dev_lock(hdev); 6014 hci_store_wake_reason(hdev, &ev->bdaddr, ev->bdaddr_type); 6015 6016 hci_dev_clear_flag(hdev, HCI_PA_SYNC); 6017 6018 conn = hci_conn_hash_lookup_create_pa_sync(hdev); 6019 if (!conn) { 6020 bt_dev_err(hdev, 6021 "Unable to find connection for dst %pMR sid 0x%2.2x", 6022 &ev->bdaddr, ev->sid); 6023 goto unlock; 6024 } 6025 6026 conn->sync_handle = le16_to_cpu(ev->sync_handle); 6027 conn->sid = HCI_SID_INVALID; 6028 6029 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, PA_LINK, 6030 &flags); 6031 if (!(mask & HCI_LM_ACCEPT)) { 6032 hci_le_pa_term_sync(hdev, ev->sync_handle); 6033 goto unlock; 6034 } 6035 6036 if (!(flags & HCI_PROTO_DEFER)) 6037 goto unlock; 6038 6039 /* Add connection to indicate PA sync event */ 6040 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0, 6041 HCI_ROLE_SLAVE); 6042 6043 if (IS_ERR(pa_sync)) 6044 goto unlock; 6045 6046 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle); 6047 6048 if (ev->status) { 6049 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags); 6050 6051 /* Notify iso layer */ 6052 hci_connect_cfm(pa_sync, ev->status); 6053 } 6054 6055 unlock: 6056 hci_dev_unlock(hdev); 6057 } 6058 6059 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data, 6060 struct sk_buff *skb) 6061 { 6062 struct hci_ev_le_conn_update_complete *ev = data; 6063 struct hci_conn *conn; 6064 6065 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6066 6067 if (ev->status) 6068 return; 6069 6070 hci_dev_lock(hdev); 6071 6072 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6073 if (conn) { 6074 conn->le_conn_interval = le16_to_cpu(ev->interval); 6075 conn->le_conn_latency = le16_to_cpu(ev->latency); 6076 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout); 6077 } 6078 6079 hci_dev_unlock(hdev); 6080 } 6081 6082 /* This function requires the caller holds hdev->lock */ 6083 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev, 6084 bdaddr_t *addr, 6085 u8 addr_type, bool addr_resolved, 6086 u8 adv_type, u8 phy, u8 sec_phy) 6087 { 6088 struct hci_conn *conn; 6089 struct hci_conn_params *params; 6090 6091 /* If the event is not connectable don't proceed further */ 6092 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND) 6093 return NULL; 6094 6095 /* Ignore if the device is blocked or hdev is suspended */ 6096 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) || 6097 hdev->suspended) 6098 return NULL; 6099 6100 /* Most controller will fail if we try to create new connections 6101 * while we have an existing one in peripheral role. 6102 */ 6103 if (hdev->conn_hash.le_num_peripheral > 0 && 6104 (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_LE_STATES) || 6105 !(hdev->le_states[3] & 0x10))) 6106 return NULL; 6107 6108 /* If we're not connectable only connect devices that we have in 6109 * our pend_le_conns list. 6110 */ 6111 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr, 6112 addr_type); 6113 if (!params) 6114 return NULL; 6115 6116 if (!params->explicit_connect) { 6117 switch (params->auto_connect) { 6118 case HCI_AUTO_CONN_DIRECT: 6119 /* Only devices advertising with ADV_DIRECT_IND are 6120 * triggering a connection attempt. This is allowing 6121 * incoming connections from peripheral devices. 6122 */ 6123 if (adv_type != LE_ADV_DIRECT_IND) 6124 return NULL; 6125 break; 6126 case HCI_AUTO_CONN_ALWAYS: 6127 /* Devices advertising with ADV_IND or ADV_DIRECT_IND 6128 * are triggering a connection attempt. This means 6129 * that incoming connections from peripheral device are 6130 * accepted and also outgoing connections to peripheral 6131 * devices are established when found. 6132 */ 6133 break; 6134 default: 6135 return NULL; 6136 } 6137 } 6138 6139 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved, 6140 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout, 6141 HCI_ROLE_MASTER, phy, sec_phy); 6142 if (!IS_ERR(conn)) { 6143 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned 6144 * by higher layer that tried to connect, if no then 6145 * store the pointer since we don't really have any 6146 * other owner of the object besides the params that 6147 * triggered it. This way we can abort the connection if 6148 * the parameters get removed and keep the reference 6149 * count consistent once the connection is established. 6150 */ 6151 6152 if (!params->explicit_connect) 6153 params->conn = hci_conn_get(conn); 6154 6155 return conn; 6156 } 6157 6158 switch (PTR_ERR(conn)) { 6159 case -EBUSY: 6160 /* If hci_connect() returns -EBUSY it means there is already 6161 * an LE connection attempt going on. Since controllers don't 6162 * support more than one connection attempt at the time, we 6163 * don't consider this an error case. 6164 */ 6165 break; 6166 default: 6167 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn)); 6168 return NULL; 6169 } 6170 6171 return NULL; 6172 } 6173 6174 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr, 6175 u8 bdaddr_type, bdaddr_t *direct_addr, 6176 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi, 6177 u8 *data, u8 len, bool ext_adv, bool ctl_time, 6178 u64 instant) 6179 { 6180 struct discovery_state *d = &hdev->discovery; 6181 struct smp_irk *irk; 6182 struct hci_conn *conn; 6183 bool match, bdaddr_resolved; 6184 u32 flags; 6185 u8 *ptr; 6186 6187 switch (type) { 6188 case LE_ADV_IND: 6189 case LE_ADV_DIRECT_IND: 6190 case LE_ADV_SCAN_IND: 6191 case LE_ADV_NONCONN_IND: 6192 case LE_ADV_SCAN_RSP: 6193 break; 6194 default: 6195 bt_dev_err_ratelimited(hdev, "unknown advertising packet " 6196 "type: 0x%02x", type); 6197 return; 6198 } 6199 6200 if (len > max_adv_len(hdev)) { 6201 bt_dev_err_ratelimited(hdev, 6202 "adv larger than maximum supported"); 6203 return; 6204 } 6205 6206 /* Find the end of the data in case the report contains padded zero 6207 * bytes at the end causing an invalid length value. 6208 * 6209 * When data is NULL, len is 0 so there is no need for extra ptr 6210 * check as 'ptr < data + 0' is already false in such case. 6211 */ 6212 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) { 6213 if (ptr + 1 + *ptr > data + len) 6214 break; 6215 } 6216 6217 /* Adjust for actual length. This handles the case when remote 6218 * device is advertising with incorrect data length. 6219 */ 6220 len = ptr - data; 6221 6222 /* If the direct address is present, then this report is from 6223 * a LE Direct Advertising Report event. In that case it is 6224 * important to see if the address is matching the local 6225 * controller address. 6226 * 6227 * If local privacy is not enable the controller shall not be 6228 * generating such event since according to its documentation it is only 6229 * valid for filter_policy 0x02 and 0x03, but the fact that it did 6230 * generate LE Direct Advertising Report means it is probably broken and 6231 * won't generate any other event which can potentially break 6232 * auto-connect logic so in case local privacy is not enable this 6233 * ignores the direct_addr so it works as a regular report. 6234 */ 6235 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr && 6236 hci_dev_test_flag(hdev, HCI_PRIVACY)) { 6237 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type, 6238 &bdaddr_resolved); 6239 6240 /* Only resolvable random addresses are valid for these 6241 * kind of reports and others can be ignored. 6242 */ 6243 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type)) 6244 return; 6245 6246 /* If the local IRK of the controller does not match 6247 * with the resolvable random address provided, then 6248 * this report can be ignored. 6249 */ 6250 if (!smp_irk_matches(hdev, hdev->irk, direct_addr)) 6251 return; 6252 } 6253 6254 /* Check if we need to convert to identity address */ 6255 irk = hci_get_irk(hdev, bdaddr, bdaddr_type); 6256 if (irk) { 6257 bdaddr = &irk->bdaddr; 6258 bdaddr_type = irk->addr_type; 6259 } 6260 6261 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved); 6262 6263 /* Check if we have been requested to connect to this device. 6264 * 6265 * direct_addr is set only for directed advertising reports (it is NULL 6266 * for advertising reports) and is already verified to be RPA above. 6267 */ 6268 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved, 6269 type, phy, sec_phy); 6270 if (!ext_adv && conn && type == LE_ADV_IND && 6271 len <= max_adv_len(hdev)) { 6272 /* Store report for later inclusion by 6273 * mgmt_device_connected 6274 */ 6275 memcpy(conn->le_adv_data, data, len); 6276 conn->le_adv_data_len = len; 6277 } 6278 6279 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND) 6280 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE; 6281 else 6282 flags = 0; 6283 6284 /* All scan results should be sent up for Mesh systems */ 6285 if (hci_dev_test_flag(hdev, HCI_MESH)) { 6286 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6287 rssi, flags, data, len, NULL, 0, instant); 6288 return; 6289 } 6290 6291 /* Passive scanning shouldn't trigger any device found events, 6292 * except for devices marked as CONN_REPORT for which we do send 6293 * device found events, or advertisement monitoring requested. 6294 */ 6295 if (hdev->le_scan_type == LE_SCAN_PASSIVE) { 6296 if (type == LE_ADV_DIRECT_IND) 6297 return; 6298 6299 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports, 6300 bdaddr, bdaddr_type) && 6301 idr_is_empty(&hdev->adv_monitors_idr)) 6302 return; 6303 6304 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6305 rssi, flags, data, len, NULL, 0, 0); 6306 return; 6307 } 6308 6309 /* When receiving a scan response, then there is no way to 6310 * know if the remote device is connectable or not. However 6311 * since scan responses are merged with a previously seen 6312 * advertising report, the flags field from that report 6313 * will be used. 6314 * 6315 * In the unlikely case that a controller just sends a scan 6316 * response event that doesn't match the pending report, then 6317 * it is marked as a standalone SCAN_RSP. 6318 */ 6319 if (type == LE_ADV_SCAN_RSP) 6320 flags = MGMT_DEV_FOUND_SCAN_RSP; 6321 6322 /* If there's nothing pending either store the data from this 6323 * event or send an immediate device found event if the data 6324 * should not be stored for later. 6325 */ 6326 if (!has_pending_adv_report(hdev)) { 6327 /* If the report will trigger a SCAN_REQ store it for 6328 * later merging. 6329 */ 6330 if (!ext_adv && (type == LE_ADV_IND || 6331 type == LE_ADV_SCAN_IND)) { 6332 store_pending_adv_report(hdev, bdaddr, bdaddr_type, 6333 rssi, flags, data, len); 6334 return; 6335 } 6336 6337 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6338 rssi, flags, data, len, NULL, 0, 0); 6339 return; 6340 } 6341 6342 /* Check if the pending report is for the same device as the new one */ 6343 match = (!bacmp(bdaddr, &d->last_adv_addr) && 6344 bdaddr_type == d->last_adv_addr_type); 6345 6346 /* If the pending data doesn't match this report or this isn't a 6347 * scan response (e.g. we got a duplicate ADV_IND) then force 6348 * sending of the pending data. 6349 */ 6350 if (type != LE_ADV_SCAN_RSP || !match) { 6351 /* Send out whatever is in the cache, but skip duplicates */ 6352 if (!match) 6353 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, 6354 d->last_adv_addr_type, NULL, 6355 d->last_adv_rssi, d->last_adv_flags, 6356 d->last_adv_data, 6357 d->last_adv_data_len, NULL, 0, 0); 6358 6359 /* If the new report will trigger a SCAN_REQ store it for 6360 * later merging. 6361 */ 6362 if (!ext_adv && (type == LE_ADV_IND || 6363 type == LE_ADV_SCAN_IND)) { 6364 store_pending_adv_report(hdev, bdaddr, bdaddr_type, 6365 rssi, flags, data, len); 6366 return; 6367 } 6368 6369 /* The advertising reports cannot be merged, so clear 6370 * the pending report and send out a device found event. 6371 */ 6372 clear_pending_adv_report(hdev); 6373 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6374 rssi, flags, data, len, NULL, 0, 0); 6375 return; 6376 } 6377 6378 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and 6379 * the new event is a SCAN_RSP. We can therefore proceed with 6380 * sending a merged device found event. 6381 */ 6382 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, 6383 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags, 6384 d->last_adv_data, d->last_adv_data_len, data, len, 0); 6385 clear_pending_adv_report(hdev); 6386 } 6387 6388 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data, 6389 struct sk_buff *skb) 6390 { 6391 struct hci_ev_le_advertising_report *ev = data; 6392 u64 instant = jiffies; 6393 6394 if (!ev->num) 6395 return; 6396 6397 hci_dev_lock(hdev); 6398 6399 while (ev->num--) { 6400 struct hci_ev_le_advertising_info *info; 6401 s8 rssi; 6402 6403 info = hci_le_ev_skb_pull(hdev, skb, 6404 HCI_EV_LE_ADVERTISING_REPORT, 6405 sizeof(*info)); 6406 if (!info) 6407 break; 6408 6409 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT, 6410 info->length + 1)) 6411 break; 6412 6413 hci_store_wake_reason(hdev, &info->bdaddr, info->bdaddr_type); 6414 6415 if (info->length <= max_adv_len(hdev)) { 6416 rssi = info->data[info->length]; 6417 process_adv_report(hdev, info->type, &info->bdaddr, 6418 info->bdaddr_type, NULL, 0, 6419 HCI_ADV_PHY_1M, 0, rssi, 6420 info->data, info->length, false, 6421 false, instant); 6422 } else { 6423 bt_dev_err(hdev, "Dropping invalid advertising data"); 6424 } 6425 } 6426 6427 hci_dev_unlock(hdev); 6428 } 6429 6430 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type) 6431 { 6432 u16 pdu_type = evt_type & ~LE_EXT_ADV_DATA_STATUS_MASK; 6433 6434 if (!pdu_type) 6435 return LE_ADV_NONCONN_IND; 6436 6437 if (evt_type & LE_EXT_ADV_LEGACY_PDU) { 6438 switch (evt_type) { 6439 case LE_LEGACY_ADV_IND: 6440 return LE_ADV_IND; 6441 case LE_LEGACY_ADV_DIRECT_IND: 6442 return LE_ADV_DIRECT_IND; 6443 case LE_LEGACY_ADV_SCAN_IND: 6444 return LE_ADV_SCAN_IND; 6445 case LE_LEGACY_NONCONN_IND: 6446 return LE_ADV_NONCONN_IND; 6447 case LE_LEGACY_SCAN_RSP_ADV: 6448 case LE_LEGACY_SCAN_RSP_ADV_SCAN: 6449 return LE_ADV_SCAN_RSP; 6450 } 6451 6452 goto invalid; 6453 } 6454 6455 if (evt_type & LE_EXT_ADV_CONN_IND) { 6456 if (evt_type & LE_EXT_ADV_DIRECT_IND) 6457 return LE_ADV_DIRECT_IND; 6458 6459 return LE_ADV_IND; 6460 } 6461 6462 if (evt_type & LE_EXT_ADV_SCAN_RSP) 6463 return LE_ADV_SCAN_RSP; 6464 6465 if (evt_type & LE_EXT_ADV_SCAN_IND) 6466 return LE_ADV_SCAN_IND; 6467 6468 if (evt_type & LE_EXT_ADV_DIRECT_IND) 6469 return LE_ADV_NONCONN_IND; 6470 6471 invalid: 6472 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x", 6473 evt_type); 6474 6475 return LE_ADV_INVALID; 6476 } 6477 6478 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data, 6479 struct sk_buff *skb) 6480 { 6481 struct hci_ev_le_ext_adv_report *ev = data; 6482 u64 instant = jiffies; 6483 6484 if (!ev->num) 6485 return; 6486 6487 hci_dev_lock(hdev); 6488 6489 while (ev->num--) { 6490 struct hci_ev_le_ext_adv_info *info; 6491 u8 legacy_evt_type; 6492 u16 evt_type; 6493 6494 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT, 6495 sizeof(*info)); 6496 if (!info) 6497 break; 6498 6499 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT, 6500 info->length)) 6501 break; 6502 6503 hci_store_wake_reason(hdev, &info->bdaddr, info->bdaddr_type); 6504 6505 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK; 6506 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type); 6507 6508 if (hci_test_quirk(hdev, 6509 HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY)) { 6510 info->primary_phy &= 0x1f; 6511 info->secondary_phy &= 0x1f; 6512 } 6513 6514 /* Check if PA Sync is pending and if the hci_conn SID has not 6515 * been set update it. 6516 */ 6517 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) { 6518 struct hci_conn *conn; 6519 6520 conn = hci_conn_hash_lookup_create_pa_sync(hdev); 6521 if (conn && conn->sid == HCI_SID_INVALID) 6522 conn->sid = info->sid; 6523 } 6524 6525 if (legacy_evt_type != LE_ADV_INVALID) { 6526 process_adv_report(hdev, legacy_evt_type, &info->bdaddr, 6527 info->bdaddr_type, NULL, 0, 6528 info->primary_phy, 6529 info->secondary_phy, 6530 info->rssi, info->data, info->length, 6531 !(evt_type & LE_EXT_ADV_LEGACY_PDU), 6532 false, instant); 6533 } 6534 } 6535 6536 hci_dev_unlock(hdev); 6537 } 6538 6539 static void hci_le_pa_sync_established_evt(struct hci_dev *hdev, void *data, 6540 struct sk_buff *skb) 6541 { 6542 struct hci_ev_le_pa_sync_established *ev = data; 6543 int mask = hdev->link_mode; 6544 __u8 flags = 0; 6545 struct hci_conn *pa_sync, *conn; 6546 6547 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6548 6549 hci_dev_lock(hdev); 6550 hci_store_wake_reason(hdev, &ev->bdaddr, ev->bdaddr_type); 6551 6552 hci_dev_clear_flag(hdev, HCI_PA_SYNC); 6553 6554 conn = hci_conn_hash_lookup_create_pa_sync(hdev); 6555 if (!conn) { 6556 bt_dev_err(hdev, 6557 "Unable to find connection for dst %pMR sid 0x%2.2x", 6558 &ev->bdaddr, ev->sid); 6559 goto unlock; 6560 } 6561 6562 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags); 6563 6564 conn->sync_handle = le16_to_cpu(ev->handle); 6565 conn->sid = HCI_SID_INVALID; 6566 6567 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, PA_LINK, 6568 &flags); 6569 if (!(mask & HCI_LM_ACCEPT)) { 6570 hci_le_pa_term_sync(hdev, ev->handle); 6571 goto unlock; 6572 } 6573 6574 if (!(flags & HCI_PROTO_DEFER)) 6575 goto unlock; 6576 6577 /* Add connection to indicate PA sync event */ 6578 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0, 6579 HCI_ROLE_SLAVE); 6580 6581 if (IS_ERR(pa_sync)) 6582 goto unlock; 6583 6584 pa_sync->sync_handle = le16_to_cpu(ev->handle); 6585 6586 if (ev->status) { 6587 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags); 6588 6589 /* Notify iso layer */ 6590 hci_connect_cfm(pa_sync, ev->status); 6591 } 6592 6593 unlock: 6594 hci_dev_unlock(hdev); 6595 } 6596 6597 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data, 6598 struct sk_buff *skb) 6599 { 6600 struct hci_ev_le_per_adv_report *ev = data; 6601 int mask = hdev->link_mode; 6602 __u8 flags = 0; 6603 struct hci_conn *pa_sync; 6604 6605 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle)); 6606 6607 hci_dev_lock(hdev); 6608 6609 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, PA_LINK, &flags); 6610 if (!(mask & HCI_LM_ACCEPT)) 6611 goto unlock; 6612 6613 if (!(flags & HCI_PROTO_DEFER)) 6614 goto unlock; 6615 6616 pa_sync = hci_conn_hash_lookup_pa_sync_handle 6617 (hdev, 6618 le16_to_cpu(ev->sync_handle)); 6619 6620 if (!pa_sync) 6621 goto unlock; 6622 6623 if (ev->data_status == LE_PA_DATA_COMPLETE && 6624 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) { 6625 /* Notify iso layer */ 6626 hci_connect_cfm(pa_sync, 0); 6627 6628 /* Notify MGMT layer */ 6629 mgmt_device_connected(hdev, pa_sync, NULL, 0); 6630 } 6631 6632 unlock: 6633 hci_dev_unlock(hdev); 6634 } 6635 6636 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data, 6637 struct sk_buff *skb) 6638 { 6639 struct hci_ev_le_remote_feat_complete *ev = data; 6640 struct hci_conn *conn; 6641 6642 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6643 6644 hci_dev_lock(hdev); 6645 6646 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6647 if (conn) { 6648 if (!ev->status) { 6649 memcpy(conn->le_features, ev->features, 8); 6650 6651 /* Update supported PHYs */ 6652 if (!(conn->le_features[1] & HCI_LE_PHY_2M)) { 6653 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_2M; 6654 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_2M; 6655 } 6656 6657 if (!(conn->le_features[1] & HCI_LE_PHY_CODED)) { 6658 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_CODED; 6659 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_CODED; 6660 } 6661 } 6662 6663 if (conn->state == BT_CONFIG) { 6664 __u8 status; 6665 6666 /* If the local controller supports peripheral-initiated 6667 * features exchange, but the remote controller does 6668 * not, then it is possible that the error code 0x1a 6669 * for unsupported remote feature gets returned. 6670 * 6671 * In this specific case, allow the connection to 6672 * transition into connected state and mark it as 6673 * successful. 6674 */ 6675 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE && 6676 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) 6677 status = 0x00; 6678 else 6679 status = ev->status; 6680 6681 conn->state = BT_CONNECTED; 6682 hci_connect_cfm(conn, status); 6683 } 6684 } 6685 6686 hci_dev_unlock(hdev); 6687 } 6688 6689 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data, 6690 struct sk_buff *skb) 6691 { 6692 struct hci_ev_le_ltk_req *ev = data; 6693 struct hci_cp_le_ltk_reply cp; 6694 struct hci_cp_le_ltk_neg_reply neg; 6695 struct hci_conn *conn; 6696 struct smp_ltk *ltk; 6697 6698 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle)); 6699 6700 hci_dev_lock(hdev); 6701 6702 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6703 if (conn == NULL) 6704 goto not_found; 6705 6706 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role); 6707 if (!ltk) 6708 goto not_found; 6709 6710 if (smp_ltk_is_sc(ltk)) { 6711 /* With SC both EDiv and Rand are set to zero */ 6712 if (ev->ediv || ev->rand) 6713 goto not_found; 6714 } else { 6715 /* For non-SC keys check that EDiv and Rand match */ 6716 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand) 6717 goto not_found; 6718 } 6719 6720 memcpy(cp.ltk, ltk->val, ltk->enc_size); 6721 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size); 6722 cp.handle = cpu_to_le16(conn->handle); 6723 6724 conn->pending_sec_level = smp_ltk_sec_level(ltk); 6725 6726 conn->enc_key_size = ltk->enc_size; 6727 6728 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); 6729 6730 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a 6731 * temporary key used to encrypt a connection following 6732 * pairing. It is used during the Encrypted Session Setup to 6733 * distribute the keys. Later, security can be re-established 6734 * using a distributed LTK. 6735 */ 6736 if (ltk->type == SMP_STK) { 6737 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags); 6738 list_del_rcu(<k->list); 6739 kfree_rcu(ltk, rcu); 6740 } else { 6741 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags); 6742 } 6743 6744 hci_dev_unlock(hdev); 6745 6746 return; 6747 6748 not_found: 6749 neg.handle = ev->handle; 6750 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg); 6751 hci_dev_unlock(hdev); 6752 } 6753 6754 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle, 6755 u8 reason) 6756 { 6757 struct hci_cp_le_conn_param_req_neg_reply cp; 6758 6759 cp.handle = cpu_to_le16(handle); 6760 cp.reason = reason; 6761 6762 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp), 6763 &cp); 6764 } 6765 6766 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data, 6767 struct sk_buff *skb) 6768 { 6769 struct hci_ev_le_remote_conn_param_req *ev = data; 6770 struct hci_cp_le_conn_param_req_reply cp; 6771 struct hci_conn *hcon; 6772 u16 handle, min, max, latency, timeout; 6773 6774 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle)); 6775 6776 handle = le16_to_cpu(ev->handle); 6777 min = le16_to_cpu(ev->interval_min); 6778 max = le16_to_cpu(ev->interval_max); 6779 latency = le16_to_cpu(ev->latency); 6780 timeout = le16_to_cpu(ev->timeout); 6781 6782 hci_dev_lock(hdev); 6783 6784 hcon = hci_conn_hash_lookup_handle(hdev, handle); 6785 if (!hcon || hcon->state != BT_CONNECTED) { 6786 send_conn_param_neg_reply(hdev, handle, 6787 HCI_ERROR_UNKNOWN_CONN_ID); 6788 goto unlock; 6789 } 6790 6791 if (max > hcon->le_conn_max_interval) { 6792 send_conn_param_neg_reply(hdev, handle, 6793 HCI_ERROR_INVALID_LL_PARAMS); 6794 goto unlock; 6795 } 6796 6797 if (hci_check_conn_params(min, max, latency, timeout)) { 6798 send_conn_param_neg_reply(hdev, handle, 6799 HCI_ERROR_INVALID_LL_PARAMS); 6800 goto unlock; 6801 } 6802 6803 if (hcon->role == HCI_ROLE_MASTER) { 6804 struct hci_conn_params *params; 6805 u8 store_hint; 6806 6807 params = hci_conn_params_lookup(hdev, &hcon->dst, 6808 hcon->dst_type); 6809 if (params) { 6810 params->conn_min_interval = min; 6811 params->conn_max_interval = max; 6812 params->conn_latency = latency; 6813 params->supervision_timeout = timeout; 6814 store_hint = 0x01; 6815 } else { 6816 store_hint = 0x00; 6817 } 6818 6819 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type, 6820 store_hint, min, max, latency, timeout); 6821 } 6822 6823 cp.handle = ev->handle; 6824 cp.interval_min = ev->interval_min; 6825 cp.interval_max = ev->interval_max; 6826 cp.latency = ev->latency; 6827 cp.timeout = ev->timeout; 6828 cp.min_ce_len = 0; 6829 cp.max_ce_len = 0; 6830 6831 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp); 6832 6833 unlock: 6834 hci_dev_unlock(hdev); 6835 } 6836 6837 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data, 6838 struct sk_buff *skb) 6839 { 6840 struct hci_ev_le_direct_adv_report *ev = data; 6841 u64 instant = jiffies; 6842 int i; 6843 6844 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT, 6845 flex_array_size(ev, info, ev->num))) 6846 return; 6847 6848 if (!ev->num) 6849 return; 6850 6851 hci_dev_lock(hdev); 6852 6853 for (i = 0; i < ev->num; i++) { 6854 struct hci_ev_le_direct_adv_info *info = &ev->info[i]; 6855 6856 hci_store_wake_reason(hdev, &info->bdaddr, info->bdaddr_type); 6857 6858 process_adv_report(hdev, info->type, &info->bdaddr, 6859 info->bdaddr_type, &info->direct_addr, 6860 info->direct_addr_type, HCI_ADV_PHY_1M, 0, 6861 info->rssi, NULL, 0, false, false, instant); 6862 } 6863 6864 hci_dev_unlock(hdev); 6865 } 6866 6867 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data, 6868 struct sk_buff *skb) 6869 { 6870 struct hci_ev_le_phy_update_complete *ev = data; 6871 struct hci_conn *conn; 6872 6873 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6874 6875 if (ev->status) 6876 return; 6877 6878 hci_dev_lock(hdev); 6879 6880 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6881 if (!conn) 6882 goto unlock; 6883 6884 conn->le_tx_phy = ev->tx_phy; 6885 conn->le_rx_phy = ev->rx_phy; 6886 6887 unlock: 6888 hci_dev_unlock(hdev); 6889 } 6890 6891 /* Convert LE PHY to QoS PHYs */ 6892 static u8 le_phy_qos(u8 phy) 6893 { 6894 switch (phy) { 6895 case 0x01: 6896 return HCI_LE_SET_PHY_1M; 6897 case 0x02: 6898 return HCI_LE_SET_PHY_2M; 6899 case 0x03: 6900 return HCI_LE_SET_PHY_CODED; 6901 } 6902 6903 return 0; 6904 } 6905 6906 static void hci_le_cis_established_evt(struct hci_dev *hdev, void *data, 6907 struct sk_buff *skb) 6908 { 6909 struct hci_evt_le_cis_established *ev = data; 6910 struct hci_conn *conn; 6911 struct bt_iso_qos *qos; 6912 bool pending = false; 6913 u16 handle = __le16_to_cpu(ev->handle); 6914 u32 c_sdu_interval, p_sdu_interval; 6915 6916 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6917 6918 hci_dev_lock(hdev); 6919 6920 conn = hci_conn_hash_lookup_handle(hdev, handle); 6921 if (!conn) { 6922 bt_dev_err(hdev, 6923 "Unable to find connection with handle 0x%4.4x", 6924 handle); 6925 goto unlock; 6926 } 6927 6928 if (conn->type != CIS_LINK) { 6929 bt_dev_err(hdev, 6930 "Invalid connection link type handle 0x%4.4x", 6931 handle); 6932 goto unlock; 6933 } 6934 6935 qos = &conn->iso_qos; 6936 6937 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags); 6938 6939 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G 6940 * page 3075: 6941 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) × 6942 * ISO_Interval + SDU_Interval_C_To_P 6943 * ... 6944 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) - 6945 * Transport_Latency 6946 */ 6947 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) + 6948 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) - 6949 get_unaligned_le24(ev->c_latency); 6950 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) + 6951 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) - 6952 get_unaligned_le24(ev->p_latency); 6953 6954 switch (conn->role) { 6955 case HCI_ROLE_SLAVE: 6956 qos->ucast.in.interval = c_sdu_interval; 6957 qos->ucast.out.interval = p_sdu_interval; 6958 /* Convert Transport Latency (us) to Latency (msec) */ 6959 qos->ucast.in.latency = 6960 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency), 6961 1000); 6962 qos->ucast.out.latency = 6963 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency), 6964 1000); 6965 qos->ucast.in.sdu = ev->c_bn ? le16_to_cpu(ev->c_mtu) : 0; 6966 qos->ucast.out.sdu = ev->p_bn ? le16_to_cpu(ev->p_mtu) : 0; 6967 qos->ucast.in.phys = le_phy_qos(ev->c_phy); 6968 qos->ucast.out.phys = le_phy_qos(ev->p_phy); 6969 break; 6970 case HCI_ROLE_MASTER: 6971 qos->ucast.in.interval = p_sdu_interval; 6972 qos->ucast.out.interval = c_sdu_interval; 6973 /* Convert Transport Latency (us) to Latency (msec) */ 6974 qos->ucast.out.latency = 6975 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency), 6976 1000); 6977 qos->ucast.in.latency = 6978 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency), 6979 1000); 6980 qos->ucast.out.sdu = ev->c_bn ? le16_to_cpu(ev->c_mtu) : 0; 6981 qos->ucast.in.sdu = ev->p_bn ? le16_to_cpu(ev->p_mtu) : 0; 6982 qos->ucast.out.phys = le_phy_qos(ev->c_phy); 6983 qos->ucast.in.phys = le_phy_qos(ev->p_phy); 6984 break; 6985 } 6986 6987 if (!ev->status) { 6988 conn->state = BT_CONNECTED; 6989 hci_debugfs_create_conn(conn); 6990 hci_conn_add_sysfs(conn); 6991 hci_iso_setup_path(conn); 6992 goto unlock; 6993 } 6994 6995 conn->state = BT_CLOSED; 6996 hci_connect_cfm(conn, ev->status); 6997 hci_conn_del(conn); 6998 6999 unlock: 7000 if (pending) 7001 hci_le_create_cis_pending(hdev); 7002 7003 hci_dev_unlock(hdev); 7004 } 7005 7006 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle) 7007 { 7008 struct hci_cp_le_reject_cis cp; 7009 7010 memset(&cp, 0, sizeof(cp)); 7011 cp.handle = handle; 7012 cp.reason = HCI_ERROR_REJ_BAD_ADDR; 7013 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp); 7014 } 7015 7016 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle) 7017 { 7018 struct hci_cp_le_accept_cis cp; 7019 7020 memset(&cp, 0, sizeof(cp)); 7021 cp.handle = handle; 7022 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp); 7023 } 7024 7025 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data, 7026 struct sk_buff *skb) 7027 { 7028 struct hci_evt_le_cis_req *ev = data; 7029 u16 acl_handle, cis_handle; 7030 struct hci_conn *acl, *cis; 7031 int mask; 7032 __u8 flags = 0; 7033 7034 acl_handle = __le16_to_cpu(ev->acl_handle); 7035 cis_handle = __le16_to_cpu(ev->cis_handle); 7036 7037 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x", 7038 acl_handle, cis_handle, ev->cig_id, ev->cis_id); 7039 7040 hci_dev_lock(hdev); 7041 7042 acl = hci_conn_hash_lookup_handle(hdev, acl_handle); 7043 if (!acl) 7044 goto unlock; 7045 7046 mask = hci_proto_connect_ind(hdev, &acl->dst, CIS_LINK, &flags); 7047 if (!(mask & HCI_LM_ACCEPT)) { 7048 hci_le_reject_cis(hdev, ev->cis_handle); 7049 goto unlock; 7050 } 7051 7052 cis = hci_conn_hash_lookup_handle(hdev, cis_handle); 7053 if (!cis) { 7054 cis = hci_conn_add(hdev, CIS_LINK, &acl->dst, acl->dst_type, 7055 HCI_ROLE_SLAVE, cis_handle); 7056 if (IS_ERR(cis)) { 7057 hci_le_reject_cis(hdev, ev->cis_handle); 7058 goto unlock; 7059 } 7060 } 7061 7062 cis->iso_qos.ucast.cig = ev->cig_id; 7063 cis->iso_qos.ucast.cis = ev->cis_id; 7064 7065 if (!(flags & HCI_PROTO_DEFER)) { 7066 hci_le_accept_cis(hdev, ev->cis_handle); 7067 } else { 7068 cis->state = BT_CONNECT2; 7069 hci_connect_cfm(cis, 0); 7070 } 7071 7072 unlock: 7073 hci_dev_unlock(hdev); 7074 } 7075 7076 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data) 7077 { 7078 u8 handle = PTR_UINT(data); 7079 7080 return hci_le_terminate_big_sync(hdev, handle, 7081 HCI_ERROR_LOCAL_HOST_TERM); 7082 } 7083 7084 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data, 7085 struct sk_buff *skb) 7086 { 7087 struct hci_evt_le_create_big_complete *ev = data; 7088 struct hci_conn *conn; 7089 __u8 i = 0; 7090 7091 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status); 7092 7093 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE, 7094 flex_array_size(ev, bis_handle, ev->num_bis))) 7095 return; 7096 7097 hci_dev_lock(hdev); 7098 7099 /* Connect all BISes that are bound to the BIG */ 7100 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle, 7101 BT_BOUND, 7102 HCI_ROLE_MASTER))) { 7103 if (ev->status) { 7104 hci_connect_cfm(conn, ev->status); 7105 hci_conn_del(conn); 7106 continue; 7107 } 7108 7109 if (ev->num_bis <= i) { 7110 bt_dev_err(hdev, 7111 "Not enough BIS handles for BIG 0x%2.2x", 7112 ev->handle); 7113 ev->status = HCI_ERROR_UNSPECIFIED; 7114 hci_connect_cfm(conn, ev->status); 7115 hci_conn_del(conn); 7116 continue; 7117 } 7118 7119 if (hci_conn_set_handle(conn, 7120 __le16_to_cpu(ev->bis_handle[i++]))) { 7121 bt_dev_err(hdev, 7122 "Failed to set BIS handle for BIG 0x%2.2x", 7123 ev->handle); 7124 /* Force error so BIG gets terminated as not all BIS 7125 * could be connected. 7126 */ 7127 ev->status = HCI_ERROR_UNSPECIFIED; 7128 hci_connect_cfm(conn, ev->status); 7129 hci_conn_del(conn); 7130 continue; 7131 } 7132 7133 conn->state = BT_CONNECTED; 7134 set_bit(HCI_CONN_BIG_CREATED, &conn->flags); 7135 hci_debugfs_create_conn(conn); 7136 hci_conn_add_sysfs(conn); 7137 hci_iso_setup_path(conn); 7138 } 7139 7140 /* If there is an unexpected error or if no BISes have been connected 7141 * for the BIG, terminate it. 7142 */ 7143 if (ev->status == HCI_ERROR_UNSPECIFIED || (!ev->status && !i)) 7144 /* If no BISes have been connected for the BIG, 7145 * terminate. This is in case all bound connections 7146 * have been closed before the BIG creation 7147 * has completed. 7148 */ 7149 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync, 7150 UINT_PTR(ev->handle), NULL); 7151 7152 hci_dev_unlock(hdev); 7153 } 7154 7155 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data, 7156 struct sk_buff *skb) 7157 { 7158 struct hci_evt_le_big_sync_established *ev = data; 7159 struct hci_conn *bis, *conn; 7160 int i; 7161 7162 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 7163 7164 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABLISHED, 7165 flex_array_size(ev, bis, ev->num_bis))) 7166 return; 7167 7168 hci_dev_lock(hdev); 7169 7170 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle, 7171 ev->num_bis); 7172 if (!conn) { 7173 bt_dev_err(hdev, 7174 "Unable to find connection for big 0x%2.2x", 7175 ev->handle); 7176 goto unlock; 7177 } 7178 7179 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags); 7180 7181 conn->num_bis = 0; 7182 memset(conn->bis, 0, sizeof(conn->bis)); 7183 7184 for (i = 0; i < ev->num_bis; i++) { 7185 u16 handle = le16_to_cpu(ev->bis[i]); 7186 __le32 interval; 7187 7188 bis = hci_conn_hash_lookup_handle(hdev, handle); 7189 if (!bis) { 7190 if (handle > HCI_CONN_HANDLE_MAX) { 7191 bt_dev_dbg(hdev, "ignore too large handle %u", handle); 7192 continue; 7193 } 7194 bis = hci_conn_add(hdev, BIS_LINK, BDADDR_ANY, 0, 7195 HCI_ROLE_SLAVE, handle); 7196 if (IS_ERR(bis)) 7197 continue; 7198 } 7199 7200 if (ev->status != 0x42) 7201 /* Mark PA sync as established */ 7202 set_bit(HCI_CONN_PA_SYNC, &bis->flags); 7203 7204 bis->sync_handle = conn->sync_handle; 7205 bis->iso_qos.bcast.big = ev->handle; 7206 memset(&interval, 0, sizeof(interval)); 7207 memcpy(&interval, ev->latency, sizeof(ev->latency)); 7208 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval); 7209 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */ 7210 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100; 7211 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu); 7212 7213 if (!ev->status) { 7214 bis->state = BT_CONNECTED; 7215 set_bit(HCI_CONN_BIG_SYNC, &bis->flags); 7216 hci_debugfs_create_conn(bis); 7217 hci_conn_add_sysfs(bis); 7218 hci_iso_setup_path(bis); 7219 } 7220 } 7221 7222 /* In case BIG sync failed, notify each failed connection to 7223 * the user after all hci connections have been added 7224 */ 7225 if (ev->status) 7226 for (i = 0; i < ev->num_bis; i++) { 7227 u16 handle = le16_to_cpu(ev->bis[i]); 7228 7229 bis = hci_conn_hash_lookup_handle(hdev, handle); 7230 if (!bis) 7231 continue; 7232 7233 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags); 7234 hci_connect_cfm(bis, ev->status); 7235 } 7236 7237 unlock: 7238 hci_dev_unlock(hdev); 7239 } 7240 7241 static void hci_le_big_sync_lost_evt(struct hci_dev *hdev, void *data, 7242 struct sk_buff *skb) 7243 { 7244 struct hci_evt_le_big_sync_lost *ev = data; 7245 struct hci_conn *bis; 7246 bool mgmt_conn = false; 7247 7248 bt_dev_dbg(hdev, "big handle 0x%2.2x", ev->handle); 7249 7250 hci_dev_lock(hdev); 7251 7252 /* Delete each bis connection */ 7253 while ((bis = hci_conn_hash_lookup_big_state(hdev, ev->handle, 7254 BT_CONNECTED, 7255 HCI_ROLE_SLAVE))) { 7256 if (!mgmt_conn) { 7257 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, 7258 &bis->flags); 7259 mgmt_device_disconnected(hdev, &bis->dst, bis->type, 7260 bis->dst_type, ev->reason, 7261 mgmt_conn); 7262 } 7263 7264 clear_bit(HCI_CONN_BIG_SYNC, &bis->flags); 7265 hci_disconn_cfm(bis, ev->reason); 7266 hci_conn_del(bis); 7267 } 7268 7269 hci_dev_unlock(hdev); 7270 } 7271 7272 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data, 7273 struct sk_buff *skb) 7274 { 7275 struct hci_evt_le_big_info_adv_report *ev = data; 7276 int mask = hdev->link_mode; 7277 __u8 flags = 0; 7278 struct hci_conn *pa_sync; 7279 7280 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle)); 7281 7282 hci_dev_lock(hdev); 7283 7284 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, BIS_LINK, &flags); 7285 if (!(mask & HCI_LM_ACCEPT)) 7286 goto unlock; 7287 7288 if (!(flags & HCI_PROTO_DEFER)) 7289 goto unlock; 7290 7291 pa_sync = hci_conn_hash_lookup_pa_sync_handle 7292 (hdev, 7293 le16_to_cpu(ev->sync_handle)); 7294 7295 if (!pa_sync) 7296 goto unlock; 7297 7298 pa_sync->iso_qos.bcast.encryption = ev->encryption; 7299 7300 /* Notify iso layer */ 7301 hci_connect_cfm(pa_sync, 0); 7302 7303 unlock: 7304 hci_dev_unlock(hdev); 7305 } 7306 7307 static void hci_le_read_all_remote_features_evt(struct hci_dev *hdev, 7308 void *data, struct sk_buff *skb) 7309 { 7310 struct hci_evt_le_read_all_remote_features_complete *ev = data; 7311 struct hci_conn *conn; 7312 7313 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 7314 7315 hci_dev_lock(hdev); 7316 7317 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 7318 if (!conn) 7319 goto unlock; 7320 7321 if (!ev->status) { 7322 memcpy(conn->le_features, ev->features, 248); 7323 7324 /* Update supported PHYs */ 7325 if (!(conn->le_features[1] & HCI_LE_PHY_2M)) { 7326 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_2M; 7327 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_2M; 7328 } 7329 7330 if (!(conn->le_features[1] & HCI_LE_PHY_CODED)) { 7331 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_CODED; 7332 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_CODED; 7333 } 7334 } 7335 7336 if (conn->state == BT_CONFIG) { 7337 __u8 status; 7338 7339 /* If the local controller supports peripheral-initiated 7340 * features exchange, but the remote controller does 7341 * not, then it is possible that the error code 0x1a 7342 * for unsupported remote feature gets returned. 7343 * 7344 * In this specific case, allow the connection to 7345 * transition into connected state and mark it as 7346 * successful. 7347 */ 7348 if (!conn->out && 7349 ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE && 7350 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) 7351 status = 0x00; 7352 else 7353 status = ev->status; 7354 7355 conn->state = BT_CONNECTED; 7356 hci_connect_cfm(conn, status); 7357 } 7358 7359 unlock: 7360 hci_dev_unlock(hdev); 7361 } 7362 7363 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \ 7364 [_op] = { \ 7365 .func = _func, \ 7366 .min_len = _min_len, \ 7367 .max_len = _max_len, \ 7368 } 7369 7370 #define HCI_LE_EV(_op, _func, _len) \ 7371 HCI_LE_EV_VL(_op, _func, _len, _len) 7372 7373 #define HCI_LE_EV_STATUS(_op, _func) \ 7374 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status)) 7375 7376 /* Entries in this table shall have their position according to the subevent 7377 * opcode they handle so the use of the macros above is recommend since it does 7378 * attempt to initialize at its proper index using Designated Initializers that 7379 * way events without a callback function can be omitted. 7380 */ 7381 static const struct hci_le_ev { 7382 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb); 7383 u16 min_len; 7384 u16 max_len; 7385 } hci_le_ev_table[U8_MAX + 1] = { 7386 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */ 7387 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt, 7388 sizeof(struct hci_ev_le_conn_complete)), 7389 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */ 7390 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt, 7391 sizeof(struct hci_ev_le_advertising_report), 7392 HCI_MAX_EVENT_SIZE), 7393 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */ 7394 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE, 7395 hci_le_conn_update_complete_evt, 7396 sizeof(struct hci_ev_le_conn_update_complete)), 7397 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */ 7398 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE, 7399 hci_le_remote_feat_complete_evt, 7400 sizeof(struct hci_ev_le_remote_feat_complete)), 7401 /* [0x05 = HCI_EV_LE_LTK_REQ] */ 7402 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt, 7403 sizeof(struct hci_ev_le_ltk_req)), 7404 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */ 7405 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ, 7406 hci_le_remote_conn_param_req_evt, 7407 sizeof(struct hci_ev_le_remote_conn_param_req)), 7408 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */ 7409 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE, 7410 hci_le_enh_conn_complete_evt, 7411 sizeof(struct hci_ev_le_enh_conn_complete)), 7412 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */ 7413 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt, 7414 sizeof(struct hci_ev_le_direct_adv_report), 7415 HCI_MAX_EVENT_SIZE), 7416 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */ 7417 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt, 7418 sizeof(struct hci_ev_le_phy_update_complete)), 7419 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */ 7420 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt, 7421 sizeof(struct hci_ev_le_ext_adv_report), 7422 HCI_MAX_EVENT_SIZE), 7423 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */ 7424 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED, 7425 hci_le_pa_sync_established_evt, 7426 sizeof(struct hci_ev_le_pa_sync_established)), 7427 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */ 7428 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT, 7429 hci_le_per_adv_report_evt, 7430 sizeof(struct hci_ev_le_per_adv_report), 7431 HCI_MAX_EVENT_SIZE), 7432 /* [0x10 = HCI_EV_LE_PA_SYNC_LOST] */ 7433 HCI_LE_EV(HCI_EV_LE_PA_SYNC_LOST, hci_le_pa_sync_lost_evt, 7434 sizeof(struct hci_ev_le_pa_sync_lost)), 7435 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */ 7436 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt, 7437 sizeof(struct hci_evt_le_ext_adv_set_term)), 7438 /* [0x18 = HCI_EVT_LE_PAST_RECEIVED] */ 7439 HCI_LE_EV(HCI_EV_LE_PAST_RECEIVED, 7440 hci_le_past_received_evt, 7441 sizeof(struct hci_ev_le_past_received)), 7442 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */ 7443 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_established_evt, 7444 sizeof(struct hci_evt_le_cis_established)), 7445 /* [0x1a = HCI_EVT_LE_CIS_REQ] */ 7446 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt, 7447 sizeof(struct hci_evt_le_cis_req)), 7448 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */ 7449 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE, 7450 hci_le_create_big_complete_evt, 7451 sizeof(struct hci_evt_le_create_big_complete), 7452 HCI_MAX_EVENT_SIZE), 7453 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABLISHED] */ 7454 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABLISHED, 7455 hci_le_big_sync_established_evt, 7456 sizeof(struct hci_evt_le_big_sync_established), 7457 HCI_MAX_EVENT_SIZE), 7458 /* [0x1e = HCI_EVT_LE_BIG_SYNC_LOST] */ 7459 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_LOST, 7460 hci_le_big_sync_lost_evt, 7461 sizeof(struct hci_evt_le_big_sync_lost), 7462 HCI_MAX_EVENT_SIZE), 7463 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */ 7464 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT, 7465 hci_le_big_info_adv_report_evt, 7466 sizeof(struct hci_evt_le_big_info_adv_report), 7467 HCI_MAX_EVENT_SIZE), 7468 /* [0x2b = HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE] */ 7469 HCI_LE_EV_VL(HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE, 7470 hci_le_read_all_remote_features_evt, 7471 sizeof(struct 7472 hci_evt_le_read_all_remote_features_complete), 7473 HCI_MAX_EVENT_SIZE), 7474 }; 7475 7476 static void hci_le_meta_evt(struct hci_dev *hdev, void *data, 7477 struct sk_buff *skb, u16 *opcode, u8 *status, 7478 hci_req_complete_t *req_complete, 7479 hci_req_complete_skb_t *req_complete_skb) 7480 { 7481 struct hci_ev_le_meta *ev = data; 7482 const struct hci_le_ev *subev; 7483 7484 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent); 7485 7486 /* Only match event if command OGF is for LE */ 7487 if (hdev->req_skb && 7488 (hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 || 7489 hci_skb_opcode(hdev->req_skb) == HCI_OP_NOP) && 7490 hci_skb_event(hdev->req_skb) == ev->subevent) { 7491 *opcode = hci_skb_opcode(hdev->req_skb); 7492 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete, 7493 req_complete_skb); 7494 } 7495 7496 subev = &hci_le_ev_table[ev->subevent]; 7497 if (!subev->func) 7498 return; 7499 7500 if (skb->len < subev->min_len) { 7501 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u", 7502 ev->subevent, skb->len, subev->min_len); 7503 return; 7504 } 7505 7506 /* Just warn if the length is over max_len size it still be 7507 * possible to partially parse the event so leave to callback to 7508 * decide if that is acceptable. 7509 */ 7510 if (skb->len > subev->max_len) 7511 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u", 7512 ev->subevent, skb->len, subev->max_len); 7513 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len); 7514 if (!data) 7515 return; 7516 7517 subev->func(hdev, data, skb); 7518 } 7519 7520 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode, 7521 u8 event, struct sk_buff *skb) 7522 { 7523 struct hci_ev_cmd_complete *ev; 7524 struct hci_event_hdr *hdr; 7525 7526 if (!skb) 7527 return false; 7528 7529 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr)); 7530 if (!hdr) 7531 return false; 7532 7533 if (event) { 7534 if (hdr->evt != event) 7535 return false; 7536 return true; 7537 } 7538 7539 /* Check if request ended in Command Status - no way to retrieve 7540 * any extra parameters in this case. 7541 */ 7542 if (hdr->evt == HCI_EV_CMD_STATUS) 7543 return false; 7544 7545 if (hdr->evt != HCI_EV_CMD_COMPLETE) { 7546 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)", 7547 hdr->evt); 7548 return false; 7549 } 7550 7551 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev)); 7552 if (!ev) 7553 return false; 7554 7555 if (opcode != __le16_to_cpu(ev->opcode)) { 7556 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode, 7557 __le16_to_cpu(ev->opcode)); 7558 return false; 7559 } 7560 7561 return true; 7562 } 7563 7564 static void hci_store_wake_reason(struct hci_dev *hdev, 7565 const bdaddr_t *bdaddr, u8 addr_type) 7566 __must_hold(&hdev->lock) 7567 { 7568 lockdep_assert_held(&hdev->lock); 7569 7570 /* If we are currently suspended and this is the first BT event seen, 7571 * save the wake reason associated with the event. 7572 */ 7573 if (!hdev->suspended || hdev->wake_reason) 7574 return; 7575 7576 if (!bdaddr) { 7577 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED; 7578 return; 7579 } 7580 7581 /* Default to remote wake. Values for wake_reason are documented in the 7582 * Bluez mgmt api docs. 7583 */ 7584 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE; 7585 bacpy(&hdev->wake_addr, bdaddr); 7586 hdev->wake_addr_type = addr_type; 7587 } 7588 7589 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \ 7590 [_op] = { \ 7591 .req = false, \ 7592 .func = _func, \ 7593 .min_len = _min_len, \ 7594 .max_len = _max_len, \ 7595 } 7596 7597 #define HCI_EV(_op, _func, _len) \ 7598 HCI_EV_VL(_op, _func, _len, _len) 7599 7600 #define HCI_EV_STATUS(_op, _func) \ 7601 HCI_EV(_op, _func, sizeof(struct hci_ev_status)) 7602 7603 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \ 7604 [_op] = { \ 7605 .req = true, \ 7606 .func_req = _func, \ 7607 .min_len = _min_len, \ 7608 .max_len = _max_len, \ 7609 } 7610 7611 #define HCI_EV_REQ(_op, _func, _len) \ 7612 HCI_EV_REQ_VL(_op, _func, _len, _len) 7613 7614 /* Entries in this table shall have their position according to the event opcode 7615 * they handle so the use of the macros above is recommend since it does attempt 7616 * to initialize at its proper index using Designated Initializers that way 7617 * events without a callback function don't have entered. 7618 */ 7619 static const struct hci_ev { 7620 bool req; 7621 union { 7622 void (*func)(struct hci_dev *hdev, void *data, 7623 struct sk_buff *skb); 7624 void (*func_req)(struct hci_dev *hdev, void *data, 7625 struct sk_buff *skb, u16 *opcode, u8 *status, 7626 hci_req_complete_t *req_complete, 7627 hci_req_complete_skb_t *req_complete_skb); 7628 }; 7629 u16 min_len; 7630 u16 max_len; 7631 } hci_ev_table[U8_MAX + 1] = { 7632 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */ 7633 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt), 7634 /* [0x02 = HCI_EV_INQUIRY_RESULT] */ 7635 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt, 7636 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE), 7637 /* [0x03 = HCI_EV_CONN_COMPLETE] */ 7638 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt, 7639 sizeof(struct hci_ev_conn_complete)), 7640 /* [0x04 = HCI_EV_CONN_REQUEST] */ 7641 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt, 7642 sizeof(struct hci_ev_conn_request)), 7643 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */ 7644 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt, 7645 sizeof(struct hci_ev_disconn_complete)), 7646 /* [0x06 = HCI_EV_AUTH_COMPLETE] */ 7647 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt, 7648 sizeof(struct hci_ev_auth_complete)), 7649 /* [0x07 = HCI_EV_REMOTE_NAME] */ 7650 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt, 7651 sizeof(struct hci_ev_remote_name)), 7652 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */ 7653 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt, 7654 sizeof(struct hci_ev_encrypt_change)), 7655 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */ 7656 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE, 7657 hci_change_link_key_complete_evt, 7658 sizeof(struct hci_ev_change_link_key_complete)), 7659 /* [0x0b = HCI_EV_REMOTE_FEATURES] */ 7660 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt, 7661 sizeof(struct hci_ev_remote_features)), 7662 /* [0x0e = HCI_EV_CMD_COMPLETE] */ 7663 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt, 7664 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE), 7665 /* [0x0f = HCI_EV_CMD_STATUS] */ 7666 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt, 7667 sizeof(struct hci_ev_cmd_status)), 7668 /* [0x10 = HCI_EV_CMD_STATUS] */ 7669 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt, 7670 sizeof(struct hci_ev_hardware_error)), 7671 /* [0x12 = HCI_EV_ROLE_CHANGE] */ 7672 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt, 7673 sizeof(struct hci_ev_role_change)), 7674 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */ 7675 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt, 7676 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE), 7677 /* [0x14 = HCI_EV_MODE_CHANGE] */ 7678 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt, 7679 sizeof(struct hci_ev_mode_change)), 7680 /* [0x16 = HCI_EV_PIN_CODE_REQ] */ 7681 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt, 7682 sizeof(struct hci_ev_pin_code_req)), 7683 /* [0x17 = HCI_EV_LINK_KEY_REQ] */ 7684 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt, 7685 sizeof(struct hci_ev_link_key_req)), 7686 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */ 7687 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt, 7688 sizeof(struct hci_ev_link_key_notify)), 7689 /* [0x1c = HCI_EV_CLOCK_OFFSET] */ 7690 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt, 7691 sizeof(struct hci_ev_clock_offset)), 7692 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */ 7693 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt, 7694 sizeof(struct hci_ev_pkt_type_change)), 7695 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */ 7696 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt, 7697 sizeof(struct hci_ev_pscan_rep_mode)), 7698 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */ 7699 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI, 7700 hci_inquiry_result_with_rssi_evt, 7701 sizeof(struct hci_ev_inquiry_result_rssi), 7702 HCI_MAX_EVENT_SIZE), 7703 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */ 7704 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt, 7705 sizeof(struct hci_ev_remote_ext_features)), 7706 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */ 7707 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt, 7708 sizeof(struct hci_ev_sync_conn_complete)), 7709 /* [0x2f = HCI_EV_EXTENDED_INQUIRY_RESULT] */ 7710 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT, 7711 hci_extended_inquiry_result_evt, 7712 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE), 7713 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */ 7714 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt, 7715 sizeof(struct hci_ev_key_refresh_complete)), 7716 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */ 7717 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt, 7718 sizeof(struct hci_ev_io_capa_request)), 7719 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */ 7720 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt, 7721 sizeof(struct hci_ev_io_capa_reply)), 7722 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */ 7723 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt, 7724 sizeof(struct hci_ev_user_confirm_req)), 7725 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */ 7726 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt, 7727 sizeof(struct hci_ev_user_passkey_req)), 7728 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */ 7729 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt, 7730 sizeof(struct hci_ev_remote_oob_data_request)), 7731 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */ 7732 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt, 7733 sizeof(struct hci_ev_simple_pair_complete)), 7734 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */ 7735 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt, 7736 sizeof(struct hci_ev_user_passkey_notify)), 7737 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */ 7738 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt, 7739 sizeof(struct hci_ev_keypress_notify)), 7740 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */ 7741 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt, 7742 sizeof(struct hci_ev_remote_host_features)), 7743 /* [0x3e = HCI_EV_LE_META] */ 7744 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt, 7745 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE), 7746 /* [0xff = HCI_EV_VENDOR] */ 7747 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE), 7748 }; 7749 7750 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb, 7751 u16 *opcode, u8 *status, 7752 hci_req_complete_t *req_complete, 7753 hci_req_complete_skb_t *req_complete_skb) 7754 { 7755 const struct hci_ev *ev = &hci_ev_table[event]; 7756 void *data; 7757 7758 if (!ev->func) 7759 return; 7760 7761 if (skb->len < ev->min_len) { 7762 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u", 7763 event, skb->len, ev->min_len); 7764 return; 7765 } 7766 7767 /* Just warn if the length is over max_len size it still be 7768 * possible to partially parse the event so leave to callback to 7769 * decide if that is acceptable. 7770 */ 7771 if (skb->len > ev->max_len) 7772 bt_dev_warn_ratelimited(hdev, 7773 "unexpected event 0x%2.2x length: %u > %u", 7774 event, skb->len, ev->max_len); 7775 7776 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len); 7777 if (!data) 7778 return; 7779 7780 if (ev->req) 7781 ev->func_req(hdev, data, skb, opcode, status, req_complete, 7782 req_complete_skb); 7783 else 7784 ev->func(hdev, data, skb); 7785 } 7786 7787 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb) 7788 { 7789 struct hci_event_hdr *hdr = (void *) skb->data; 7790 hci_req_complete_t req_complete = NULL; 7791 hci_req_complete_skb_t req_complete_skb = NULL; 7792 struct sk_buff *orig_skb = NULL; 7793 u8 status = 0, event, req_evt = 0; 7794 u16 opcode = HCI_OP_NOP; 7795 7796 if (skb->len < sizeof(*hdr)) { 7797 bt_dev_err(hdev, "Malformed HCI Event"); 7798 goto done; 7799 } 7800 7801 hci_dev_lock(hdev); 7802 kfree_skb(hdev->recv_event); 7803 hdev->recv_event = skb_clone(skb, GFP_KERNEL); 7804 hci_dev_unlock(hdev); 7805 7806 event = hdr->evt; 7807 if (!event) { 7808 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x", 7809 event); 7810 goto done; 7811 } 7812 7813 /* Only match event if command OGF is not for LE */ 7814 if (hdev->req_skb && 7815 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 && 7816 hci_skb_event(hdev->req_skb) == event) { 7817 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb), 7818 status, &req_complete, &req_complete_skb); 7819 req_evt = event; 7820 } 7821 7822 /* If it looks like we might end up having to call 7823 * req_complete_skb, store a pristine copy of the skb since the 7824 * various handlers may modify the original one through 7825 * skb_pull() calls, etc. 7826 */ 7827 if (req_complete_skb || event == HCI_EV_CMD_STATUS || 7828 event == HCI_EV_CMD_COMPLETE) 7829 orig_skb = skb_clone(skb, GFP_KERNEL); 7830 7831 skb_pull(skb, HCI_EVENT_HDR_SIZE); 7832 7833 bt_dev_dbg(hdev, "event 0x%2.2x", event); 7834 7835 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete, 7836 &req_complete_skb); 7837 7838 hci_dev_lock(hdev); 7839 hci_store_wake_reason(hdev, NULL, 0); 7840 hci_dev_unlock(hdev); 7841 7842 if (req_complete) { 7843 req_complete(hdev, status, opcode); 7844 } else if (req_complete_skb) { 7845 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) { 7846 kfree_skb(orig_skb); 7847 orig_skb = NULL; 7848 } 7849 req_complete_skb(hdev, status, opcode, orig_skb); 7850 } 7851 7852 done: 7853 kfree_skb(orig_skb); 7854 kfree_skb(skb); 7855 hdev->stat.evt_rx++; 7856 } 7857