1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. 4 Copyright 2023-2024 NXP 5 6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License version 2 as 10 published by the Free Software Foundation; 11 12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 23 SOFTWARE IS DISCLAIMED. 24 */ 25 26 /* Bluetooth HCI event handling. */ 27 28 #include <linux/unaligned.h> 29 #include <linux/crypto.h> 30 #include <crypto/algapi.h> 31 32 #include <net/bluetooth/bluetooth.h> 33 #include <net/bluetooth/hci_core.h> 34 #include <net/bluetooth/mgmt.h> 35 36 #include "hci_debugfs.h" 37 #include "hci_codec.h" 38 #include "smp.h" 39 #include "msft.h" 40 #include "eir.h" 41 42 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \ 43 "\x00\x00\x00\x00\x00\x00\x00\x00" 44 45 /* Handle HCI Event packets */ 46 47 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, 48 u8 ev, size_t len) 49 { 50 void *data; 51 52 data = skb_pull_data(skb, len); 53 if (!data) 54 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev); 55 56 return data; 57 } 58 59 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, 60 u16 op, size_t len) 61 { 62 void *data; 63 64 data = skb_pull_data(skb, len); 65 if (!data) 66 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op); 67 68 return data; 69 } 70 71 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, 72 u8 ev, size_t len) 73 { 74 void *data; 75 76 data = skb_pull_data(skb, len); 77 if (!data) 78 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev); 79 80 return data; 81 } 82 83 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data, 84 struct sk_buff *skb) 85 { 86 struct hci_ev_status *rp = data; 87 88 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 89 90 /* It is possible that we receive Inquiry Complete event right 91 * before we receive Inquiry Cancel Command Complete event, in 92 * which case the latter event should have status of Command 93 * Disallowed. This should not be treated as error, since 94 * we actually achieve what Inquiry Cancel wants to achieve, 95 * which is to end the last Inquiry session. 96 */ 97 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) { 98 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command"); 99 rp->status = 0x00; 100 } 101 102 if (rp->status) 103 return rp->status; 104 105 clear_bit(HCI_INQUIRY, &hdev->flags); 106 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */ 107 wake_up_bit(&hdev->flags, HCI_INQUIRY); 108 109 hci_dev_lock(hdev); 110 /* Set discovery state to stopped if we're not doing LE active 111 * scanning. 112 */ 113 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || 114 hdev->le_scan_type != LE_SCAN_ACTIVE) 115 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 116 hci_dev_unlock(hdev); 117 118 return rp->status; 119 } 120 121 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data, 122 struct sk_buff *skb) 123 { 124 struct hci_ev_status *rp = data; 125 126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 127 128 if (rp->status) 129 return rp->status; 130 131 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ); 132 133 return rp->status; 134 } 135 136 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data, 137 struct sk_buff *skb) 138 { 139 struct hci_ev_status *rp = data; 140 141 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 142 143 if (rp->status) 144 return rp->status; 145 146 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); 147 148 return rp->status; 149 } 150 151 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data, 152 struct sk_buff *skb) 153 { 154 struct hci_rp_remote_name_req_cancel *rp = data; 155 156 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 157 158 return rp->status; 159 } 160 161 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data, 162 struct sk_buff *skb) 163 { 164 struct hci_rp_role_discovery *rp = data; 165 struct hci_conn *conn; 166 167 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 168 169 if (rp->status) 170 return rp->status; 171 172 hci_dev_lock(hdev); 173 174 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 175 if (conn) 176 conn->role = rp->role; 177 178 hci_dev_unlock(hdev); 179 180 return rp->status; 181 } 182 183 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data, 184 struct sk_buff *skb) 185 { 186 struct hci_rp_read_link_policy *rp = data; 187 struct hci_conn *conn; 188 189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 190 191 if (rp->status) 192 return rp->status; 193 194 hci_dev_lock(hdev); 195 196 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 197 if (conn) 198 conn->link_policy = __le16_to_cpu(rp->policy); 199 200 hci_dev_unlock(hdev); 201 202 return rp->status; 203 } 204 205 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data, 206 struct sk_buff *skb) 207 { 208 struct hci_rp_write_link_policy *rp = data; 209 struct hci_conn *conn; 210 void *sent; 211 212 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 213 214 if (rp->status) 215 return rp->status; 216 217 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY); 218 if (!sent) 219 return rp->status; 220 221 hci_dev_lock(hdev); 222 223 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 224 if (conn) 225 conn->link_policy = get_unaligned_le16(sent + 2); 226 227 hci_dev_unlock(hdev); 228 229 return rp->status; 230 } 231 232 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data, 233 struct sk_buff *skb) 234 { 235 struct hci_rp_read_def_link_policy *rp = data; 236 237 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 238 239 if (rp->status) 240 return rp->status; 241 242 hdev->link_policy = __le16_to_cpu(rp->policy); 243 244 return rp->status; 245 } 246 247 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data, 248 struct sk_buff *skb) 249 { 250 struct hci_ev_status *rp = data; 251 void *sent; 252 253 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 254 255 if (rp->status) 256 return rp->status; 257 258 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY); 259 if (!sent) 260 return rp->status; 261 262 hdev->link_policy = get_unaligned_le16(sent); 263 264 return rp->status; 265 } 266 267 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb) 268 { 269 struct hci_ev_status *rp = data; 270 271 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 272 273 clear_bit(HCI_RESET, &hdev->flags); 274 275 if (rp->status) 276 return rp->status; 277 278 /* Reset all non-persistent flags */ 279 hci_dev_clear_volatile_flags(hdev); 280 281 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 282 283 hdev->inq_tx_power = HCI_TX_POWER_INVALID; 284 hdev->adv_tx_power = HCI_TX_POWER_INVALID; 285 286 memset(hdev->adv_data, 0, sizeof(hdev->adv_data)); 287 hdev->adv_data_len = 0; 288 289 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data)); 290 hdev->scan_rsp_data_len = 0; 291 292 hdev->le_scan_type = LE_SCAN_PASSIVE; 293 294 hdev->ssp_debug_mode = 0; 295 296 hci_bdaddr_list_clear(&hdev->le_accept_list); 297 hci_bdaddr_list_clear(&hdev->le_resolv_list); 298 299 return rp->status; 300 } 301 302 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data, 303 struct sk_buff *skb) 304 { 305 struct hci_rp_read_stored_link_key *rp = data; 306 struct hci_cp_read_stored_link_key *sent; 307 308 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 309 310 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY); 311 if (!sent) 312 return rp->status; 313 314 if (!rp->status && sent->read_all == 0x01) { 315 hdev->stored_max_keys = le16_to_cpu(rp->max_keys); 316 hdev->stored_num_keys = le16_to_cpu(rp->num_keys); 317 } 318 319 return rp->status; 320 } 321 322 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data, 323 struct sk_buff *skb) 324 { 325 struct hci_rp_delete_stored_link_key *rp = data; 326 u16 num_keys; 327 328 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 329 330 if (rp->status) 331 return rp->status; 332 333 num_keys = le16_to_cpu(rp->num_keys); 334 335 if (num_keys <= hdev->stored_num_keys) 336 hdev->stored_num_keys -= num_keys; 337 else 338 hdev->stored_num_keys = 0; 339 340 return rp->status; 341 } 342 343 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data, 344 struct sk_buff *skb) 345 { 346 struct hci_ev_status *rp = data; 347 void *sent; 348 349 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 350 351 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME); 352 if (!sent) 353 return rp->status; 354 355 hci_dev_lock(hdev); 356 357 if (hci_dev_test_flag(hdev, HCI_MGMT)) 358 mgmt_set_local_name_complete(hdev, sent, rp->status); 359 else if (!rp->status) 360 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH); 361 362 hci_dev_unlock(hdev); 363 364 return rp->status; 365 } 366 367 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data, 368 struct sk_buff *skb) 369 { 370 struct hci_rp_read_local_name *rp = data; 371 372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 373 374 if (rp->status) 375 return rp->status; 376 377 if (hci_dev_test_flag(hdev, HCI_SETUP) || 378 hci_dev_test_flag(hdev, HCI_CONFIG)) 379 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH); 380 381 return rp->status; 382 } 383 384 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data, 385 struct sk_buff *skb) 386 { 387 struct hci_ev_status *rp = data; 388 void *sent; 389 390 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 391 392 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE); 393 if (!sent) 394 return rp->status; 395 396 hci_dev_lock(hdev); 397 398 if (!rp->status) { 399 __u8 param = *((__u8 *) sent); 400 401 if (param == AUTH_ENABLED) 402 set_bit(HCI_AUTH, &hdev->flags); 403 else 404 clear_bit(HCI_AUTH, &hdev->flags); 405 } 406 407 if (hci_dev_test_flag(hdev, HCI_MGMT)) 408 mgmt_auth_enable_complete(hdev, rp->status); 409 410 hci_dev_unlock(hdev); 411 412 return rp->status; 413 } 414 415 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data, 416 struct sk_buff *skb) 417 { 418 struct hci_ev_status *rp = data; 419 __u8 param; 420 void *sent; 421 422 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 423 424 if (rp->status) 425 return rp->status; 426 427 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE); 428 if (!sent) 429 return rp->status; 430 431 param = *((__u8 *) sent); 432 433 if (param) 434 set_bit(HCI_ENCRYPT, &hdev->flags); 435 else 436 clear_bit(HCI_ENCRYPT, &hdev->flags); 437 438 return rp->status; 439 } 440 441 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data, 442 struct sk_buff *skb) 443 { 444 struct hci_ev_status *rp = data; 445 __u8 param; 446 void *sent; 447 448 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 449 450 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE); 451 if (!sent) 452 return rp->status; 453 454 param = *((__u8 *) sent); 455 456 hci_dev_lock(hdev); 457 458 if (rp->status) { 459 hdev->discov_timeout = 0; 460 goto done; 461 } 462 463 if (param & SCAN_INQUIRY) 464 set_bit(HCI_ISCAN, &hdev->flags); 465 else 466 clear_bit(HCI_ISCAN, &hdev->flags); 467 468 if (param & SCAN_PAGE) 469 set_bit(HCI_PSCAN, &hdev->flags); 470 else 471 clear_bit(HCI_PSCAN, &hdev->flags); 472 473 done: 474 hci_dev_unlock(hdev); 475 476 return rp->status; 477 } 478 479 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data, 480 struct sk_buff *skb) 481 { 482 struct hci_ev_status *rp = data; 483 struct hci_cp_set_event_filter *cp; 484 void *sent; 485 486 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 487 488 if (rp->status) 489 return rp->status; 490 491 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT); 492 if (!sent) 493 return rp->status; 494 495 cp = (struct hci_cp_set_event_filter *)sent; 496 497 if (cp->flt_type == HCI_FLT_CLEAR_ALL) 498 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED); 499 else 500 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED); 501 502 return rp->status; 503 } 504 505 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data, 506 struct sk_buff *skb) 507 { 508 struct hci_rp_read_class_of_dev *rp = data; 509 510 if (WARN_ON(!hdev)) 511 return HCI_ERROR_UNSPECIFIED; 512 513 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 514 515 if (rp->status) 516 return rp->status; 517 518 memcpy(hdev->dev_class, rp->dev_class, 3); 519 520 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2], 521 hdev->dev_class[1], hdev->dev_class[0]); 522 523 return rp->status; 524 } 525 526 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data, 527 struct sk_buff *skb) 528 { 529 struct hci_ev_status *rp = data; 530 void *sent; 531 532 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 533 534 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV); 535 if (!sent) 536 return rp->status; 537 538 hci_dev_lock(hdev); 539 540 if (!rp->status) 541 memcpy(hdev->dev_class, sent, 3); 542 543 if (hci_dev_test_flag(hdev, HCI_MGMT)) 544 mgmt_set_class_of_dev_complete(hdev, sent, rp->status); 545 546 hci_dev_unlock(hdev); 547 548 return rp->status; 549 } 550 551 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data, 552 struct sk_buff *skb) 553 { 554 struct hci_rp_read_voice_setting *rp = data; 555 __u16 setting; 556 557 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 558 559 if (rp->status) 560 return rp->status; 561 562 setting = __le16_to_cpu(rp->voice_setting); 563 564 if (hdev->voice_setting == setting) 565 return rp->status; 566 567 hdev->voice_setting = setting; 568 569 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting); 570 571 if (hdev->notify) 572 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING); 573 574 return rp->status; 575 } 576 577 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data, 578 struct sk_buff *skb) 579 { 580 struct hci_ev_status *rp = data; 581 __u16 setting; 582 void *sent; 583 584 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 585 586 if (rp->status) 587 return rp->status; 588 589 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING); 590 if (!sent) 591 return rp->status; 592 593 setting = get_unaligned_le16(sent); 594 595 if (hdev->voice_setting == setting) 596 return rp->status; 597 598 hdev->voice_setting = setting; 599 600 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting); 601 602 if (hdev->notify) 603 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING); 604 605 return rp->status; 606 } 607 608 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data, 609 struct sk_buff *skb) 610 { 611 struct hci_rp_read_num_supported_iac *rp = data; 612 613 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 614 615 if (rp->status) 616 return rp->status; 617 618 hdev->num_iac = rp->num_iac; 619 620 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac); 621 622 return rp->status; 623 } 624 625 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data, 626 struct sk_buff *skb) 627 { 628 struct hci_ev_status *rp = data; 629 struct hci_cp_write_ssp_mode *sent; 630 631 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 632 633 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE); 634 if (!sent) 635 return rp->status; 636 637 hci_dev_lock(hdev); 638 639 if (!rp->status) { 640 if (sent->mode) 641 hdev->features[1][0] |= LMP_HOST_SSP; 642 else 643 hdev->features[1][0] &= ~LMP_HOST_SSP; 644 } 645 646 if (!rp->status) { 647 if (sent->mode) 648 hci_dev_set_flag(hdev, HCI_SSP_ENABLED); 649 else 650 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED); 651 } 652 653 hci_dev_unlock(hdev); 654 655 return rp->status; 656 } 657 658 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data, 659 struct sk_buff *skb) 660 { 661 struct hci_ev_status *rp = data; 662 struct hci_cp_write_sc_support *sent; 663 664 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 665 666 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT); 667 if (!sent) 668 return rp->status; 669 670 hci_dev_lock(hdev); 671 672 if (!rp->status) { 673 if (sent->support) 674 hdev->features[1][0] |= LMP_HOST_SC; 675 else 676 hdev->features[1][0] &= ~LMP_HOST_SC; 677 } 678 679 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) { 680 if (sent->support) 681 hci_dev_set_flag(hdev, HCI_SC_ENABLED); 682 else 683 hci_dev_clear_flag(hdev, HCI_SC_ENABLED); 684 } 685 686 hci_dev_unlock(hdev); 687 688 return rp->status; 689 } 690 691 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data, 692 struct sk_buff *skb) 693 { 694 struct hci_rp_read_local_version *rp = data; 695 696 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 697 698 if (rp->status) 699 return rp->status; 700 701 if (hci_dev_test_flag(hdev, HCI_SETUP) || 702 hci_dev_test_flag(hdev, HCI_CONFIG)) { 703 hdev->hci_ver = rp->hci_ver; 704 hdev->hci_rev = __le16_to_cpu(rp->hci_rev); 705 hdev->lmp_ver = rp->lmp_ver; 706 hdev->manufacturer = __le16_to_cpu(rp->manufacturer); 707 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver); 708 } 709 710 return rp->status; 711 } 712 713 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data, 714 struct sk_buff *skb) 715 { 716 struct hci_rp_read_enc_key_size *rp = data; 717 struct hci_conn *conn; 718 u16 handle; 719 u8 status = rp->status; 720 721 bt_dev_dbg(hdev, "status 0x%2.2x", status); 722 723 handle = le16_to_cpu(rp->handle); 724 725 hci_dev_lock(hdev); 726 727 conn = hci_conn_hash_lookup_handle(hdev, handle); 728 if (!conn) { 729 status = 0xFF; 730 goto done; 731 } 732 733 /* While unexpected, the read_enc_key_size command may fail. The most 734 * secure approach is to then assume the key size is 0 to force a 735 * disconnection. 736 */ 737 if (status) { 738 bt_dev_err(hdev, "failed to read key size for handle %u", 739 handle); 740 conn->enc_key_size = 0; 741 } else { 742 u8 *key_enc_size = hci_conn_key_enc_size(conn); 743 744 conn->enc_key_size = rp->key_size; 745 status = 0; 746 747 /* Attempt to check if the key size is too small or if it has 748 * been downgraded from the last time it was stored as part of 749 * the link_key. 750 */ 751 if (conn->enc_key_size < hdev->min_enc_key_size || 752 (key_enc_size && conn->enc_key_size < *key_enc_size)) { 753 /* As slave role, the conn->state has been set to 754 * BT_CONNECTED and l2cap conn req might not be received 755 * yet, at this moment the l2cap layer almost does 756 * nothing with the non-zero status. 757 * So we also clear encrypt related bits, and then the 758 * handler of l2cap conn req will get the right secure 759 * state at a later time. 760 */ 761 status = HCI_ERROR_AUTH_FAILURE; 762 clear_bit(HCI_CONN_ENCRYPT, &conn->flags); 763 clear_bit(HCI_CONN_AES_CCM, &conn->flags); 764 } 765 766 /* Update the key encryption size with the connection one */ 767 if (key_enc_size && *key_enc_size != conn->enc_key_size) 768 *key_enc_size = conn->enc_key_size; 769 } 770 771 hci_encrypt_cfm(conn, status); 772 773 done: 774 hci_dev_unlock(hdev); 775 776 return status; 777 } 778 779 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data, 780 struct sk_buff *skb) 781 { 782 struct hci_rp_read_local_commands *rp = data; 783 784 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 785 786 if (rp->status) 787 return rp->status; 788 789 if (hci_dev_test_flag(hdev, HCI_SETUP) || 790 hci_dev_test_flag(hdev, HCI_CONFIG)) 791 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands)); 792 793 return rp->status; 794 } 795 796 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data, 797 struct sk_buff *skb) 798 { 799 struct hci_rp_read_auth_payload_to *rp = data; 800 struct hci_conn *conn; 801 802 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 803 804 if (rp->status) 805 return rp->status; 806 807 hci_dev_lock(hdev); 808 809 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 810 if (conn) 811 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout); 812 813 hci_dev_unlock(hdev); 814 815 return rp->status; 816 } 817 818 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data, 819 struct sk_buff *skb) 820 { 821 struct hci_rp_write_auth_payload_to *rp = data; 822 struct hci_conn *conn; 823 void *sent; 824 825 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 826 827 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO); 828 if (!sent) 829 return rp->status; 830 831 hci_dev_lock(hdev); 832 833 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 834 if (!conn) { 835 rp->status = 0xff; 836 goto unlock; 837 } 838 839 if (!rp->status) 840 conn->auth_payload_timeout = get_unaligned_le16(sent + 2); 841 842 unlock: 843 hci_dev_unlock(hdev); 844 845 return rp->status; 846 } 847 848 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data, 849 struct sk_buff *skb) 850 { 851 struct hci_rp_read_local_features *rp = data; 852 853 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 854 855 if (rp->status) 856 return rp->status; 857 858 memcpy(hdev->features, rp->features, 8); 859 860 /* Adjust default settings according to features 861 * supported by device. */ 862 863 if (hdev->features[0][0] & LMP_3SLOT) 864 hdev->pkt_type |= (HCI_DM3 | HCI_DH3); 865 866 if (hdev->features[0][0] & LMP_5SLOT) 867 hdev->pkt_type |= (HCI_DM5 | HCI_DH5); 868 869 if (hdev->features[0][1] & LMP_HV2) { 870 hdev->pkt_type |= (HCI_HV2); 871 hdev->esco_type |= (ESCO_HV2); 872 } 873 874 if (hdev->features[0][1] & LMP_HV3) { 875 hdev->pkt_type |= (HCI_HV3); 876 hdev->esco_type |= (ESCO_HV3); 877 } 878 879 if (lmp_esco_capable(hdev)) 880 hdev->esco_type |= (ESCO_EV3); 881 882 if (hdev->features[0][4] & LMP_EV4) 883 hdev->esco_type |= (ESCO_EV4); 884 885 if (hdev->features[0][4] & LMP_EV5) 886 hdev->esco_type |= (ESCO_EV5); 887 888 if (hdev->features[0][5] & LMP_EDR_ESCO_2M) 889 hdev->esco_type |= (ESCO_2EV3); 890 891 if (hdev->features[0][5] & LMP_EDR_ESCO_3M) 892 hdev->esco_type |= (ESCO_3EV3); 893 894 if (hdev->features[0][5] & LMP_EDR_3S_ESCO) 895 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5); 896 897 return rp->status; 898 } 899 900 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data, 901 struct sk_buff *skb) 902 { 903 struct hci_rp_read_local_ext_features *rp = data; 904 905 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 906 907 if (rp->status) 908 return rp->status; 909 910 if (hdev->max_page < rp->max_page) { 911 if (hci_test_quirk(hdev, 912 HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2)) 913 bt_dev_warn(hdev, "broken local ext features page 2"); 914 else 915 hdev->max_page = rp->max_page; 916 } 917 918 if (rp->page < HCI_MAX_PAGES) 919 memcpy(hdev->features[rp->page], rp->features, 8); 920 921 return rp->status; 922 } 923 924 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data, 925 struct sk_buff *skb) 926 { 927 struct hci_rp_read_buffer_size *rp = data; 928 929 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 930 931 if (rp->status) 932 return rp->status; 933 934 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu); 935 hdev->sco_mtu = rp->sco_mtu; 936 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt); 937 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt); 938 939 if (hci_test_quirk(hdev, HCI_QUIRK_FIXUP_BUFFER_SIZE)) { 940 hdev->sco_mtu = 64; 941 hdev->sco_pkts = 8; 942 } 943 944 if (!read_voice_setting_capable(hdev)) 945 hdev->sco_pkts = 0; 946 947 hdev->acl_cnt = hdev->acl_pkts; 948 hdev->sco_cnt = hdev->sco_pkts; 949 950 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu, 951 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts); 952 953 if (!hdev->acl_mtu || !hdev->acl_pkts) 954 return HCI_ERROR_INVALID_PARAMETERS; 955 956 return rp->status; 957 } 958 959 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data, 960 struct sk_buff *skb) 961 { 962 struct hci_rp_read_bd_addr *rp = data; 963 964 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 965 966 if (rp->status) 967 return rp->status; 968 969 if (test_bit(HCI_INIT, &hdev->flags)) 970 bacpy(&hdev->bdaddr, &rp->bdaddr); 971 972 if (hci_dev_test_flag(hdev, HCI_SETUP)) 973 bacpy(&hdev->setup_addr, &rp->bdaddr); 974 975 return rp->status; 976 } 977 978 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data, 979 struct sk_buff *skb) 980 { 981 struct hci_rp_read_local_pairing_opts *rp = data; 982 983 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 984 985 if (rp->status) 986 return rp->status; 987 988 if (hci_dev_test_flag(hdev, HCI_SETUP) || 989 hci_dev_test_flag(hdev, HCI_CONFIG)) { 990 hdev->pairing_opts = rp->pairing_opts; 991 hdev->max_enc_key_size = rp->max_key_size; 992 } 993 994 return rp->status; 995 } 996 997 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data, 998 struct sk_buff *skb) 999 { 1000 struct hci_rp_read_page_scan_activity *rp = data; 1001 1002 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1003 1004 if (rp->status) 1005 return rp->status; 1006 1007 if (test_bit(HCI_INIT, &hdev->flags)) { 1008 hdev->page_scan_interval = __le16_to_cpu(rp->interval); 1009 hdev->page_scan_window = __le16_to_cpu(rp->window); 1010 } 1011 1012 return rp->status; 1013 } 1014 1015 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data, 1016 struct sk_buff *skb) 1017 { 1018 struct hci_ev_status *rp = data; 1019 struct hci_cp_write_page_scan_activity *sent; 1020 1021 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1022 1023 if (rp->status) 1024 return rp->status; 1025 1026 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY); 1027 if (!sent) 1028 return rp->status; 1029 1030 hdev->page_scan_interval = __le16_to_cpu(sent->interval); 1031 hdev->page_scan_window = __le16_to_cpu(sent->window); 1032 1033 return rp->status; 1034 } 1035 1036 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data, 1037 struct sk_buff *skb) 1038 { 1039 struct hci_rp_read_page_scan_type *rp = data; 1040 1041 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1042 1043 if (rp->status) 1044 return rp->status; 1045 1046 if (test_bit(HCI_INIT, &hdev->flags)) 1047 hdev->page_scan_type = rp->type; 1048 1049 return rp->status; 1050 } 1051 1052 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data, 1053 struct sk_buff *skb) 1054 { 1055 struct hci_ev_status *rp = data; 1056 u8 *type; 1057 1058 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1059 1060 if (rp->status) 1061 return rp->status; 1062 1063 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE); 1064 if (type) 1065 hdev->page_scan_type = *type; 1066 1067 return rp->status; 1068 } 1069 1070 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data, 1071 struct sk_buff *skb) 1072 { 1073 struct hci_rp_read_clock *rp = data; 1074 struct hci_cp_read_clock *cp; 1075 struct hci_conn *conn; 1076 1077 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1078 1079 if (rp->status) 1080 return rp->status; 1081 1082 hci_dev_lock(hdev); 1083 1084 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK); 1085 if (!cp) 1086 goto unlock; 1087 1088 if (cp->which == 0x00) { 1089 hdev->clock = le32_to_cpu(rp->clock); 1090 goto unlock; 1091 } 1092 1093 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 1094 if (conn) { 1095 conn->clock = le32_to_cpu(rp->clock); 1096 conn->clock_accuracy = le16_to_cpu(rp->accuracy); 1097 } 1098 1099 unlock: 1100 hci_dev_unlock(hdev); 1101 return rp->status; 1102 } 1103 1104 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data, 1105 struct sk_buff *skb) 1106 { 1107 struct hci_rp_read_inq_rsp_tx_power *rp = data; 1108 1109 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1110 1111 if (rp->status) 1112 return rp->status; 1113 1114 hdev->inq_tx_power = rp->tx_power; 1115 1116 return rp->status; 1117 } 1118 1119 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data, 1120 struct sk_buff *skb) 1121 { 1122 struct hci_rp_read_def_err_data_reporting *rp = data; 1123 1124 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1125 1126 if (rp->status) 1127 return rp->status; 1128 1129 hdev->err_data_reporting = rp->err_data_reporting; 1130 1131 return rp->status; 1132 } 1133 1134 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data, 1135 struct sk_buff *skb) 1136 { 1137 struct hci_ev_status *rp = data; 1138 struct hci_cp_write_def_err_data_reporting *cp; 1139 1140 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1141 1142 if (rp->status) 1143 return rp->status; 1144 1145 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING); 1146 if (!cp) 1147 return rp->status; 1148 1149 hdev->err_data_reporting = cp->err_data_reporting; 1150 1151 return rp->status; 1152 } 1153 1154 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data, 1155 struct sk_buff *skb) 1156 { 1157 struct hci_rp_pin_code_reply *rp = data; 1158 struct hci_cp_pin_code_reply *cp; 1159 struct hci_conn *conn; 1160 1161 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1162 1163 hci_dev_lock(hdev); 1164 1165 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1166 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status); 1167 1168 if (rp->status) 1169 goto unlock; 1170 1171 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY); 1172 if (!cp) 1173 goto unlock; 1174 1175 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 1176 if (conn) 1177 conn->pin_length = cp->pin_len; 1178 1179 unlock: 1180 hci_dev_unlock(hdev); 1181 return rp->status; 1182 } 1183 1184 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data, 1185 struct sk_buff *skb) 1186 { 1187 struct hci_rp_pin_code_neg_reply *rp = data; 1188 1189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1190 1191 hci_dev_lock(hdev); 1192 1193 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1194 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr, 1195 rp->status); 1196 1197 hci_dev_unlock(hdev); 1198 1199 return rp->status; 1200 } 1201 1202 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data, 1203 struct sk_buff *skb) 1204 { 1205 struct hci_rp_le_read_buffer_size *rp = data; 1206 1207 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1208 1209 if (rp->status) 1210 return rp->status; 1211 1212 hdev->le_mtu = __le16_to_cpu(rp->le_mtu); 1213 hdev->le_pkts = rp->le_max_pkt; 1214 1215 hdev->le_cnt = hdev->le_pkts; 1216 1217 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts); 1218 1219 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU) 1220 return HCI_ERROR_INVALID_PARAMETERS; 1221 1222 return rp->status; 1223 } 1224 1225 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data, 1226 struct sk_buff *skb) 1227 { 1228 struct hci_rp_le_read_local_features *rp = data; 1229 1230 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status); 1231 1232 if (rp->status) 1233 return rp->status; 1234 1235 memcpy(hdev->le_features, rp->features, 8); 1236 1237 return rp->status; 1238 } 1239 1240 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data, 1241 struct sk_buff *skb) 1242 { 1243 struct hci_rp_le_read_adv_tx_power *rp = data; 1244 1245 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1246 1247 if (rp->status) 1248 return rp->status; 1249 1250 hdev->adv_tx_power = rp->tx_power; 1251 1252 return rp->status; 1253 } 1254 1255 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data, 1256 struct sk_buff *skb) 1257 { 1258 struct hci_rp_user_confirm_reply *rp = data; 1259 1260 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1261 1262 hci_dev_lock(hdev); 1263 1264 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1265 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0, 1266 rp->status); 1267 1268 hci_dev_unlock(hdev); 1269 1270 return rp->status; 1271 } 1272 1273 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data, 1274 struct sk_buff *skb) 1275 { 1276 struct hci_rp_user_confirm_reply *rp = data; 1277 1278 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1279 1280 hci_dev_lock(hdev); 1281 1282 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1283 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr, 1284 ACL_LINK, 0, rp->status); 1285 1286 hci_dev_unlock(hdev); 1287 1288 return rp->status; 1289 } 1290 1291 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data, 1292 struct sk_buff *skb) 1293 { 1294 struct hci_rp_user_confirm_reply *rp = data; 1295 1296 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1297 1298 hci_dev_lock(hdev); 1299 1300 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1301 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 1302 0, rp->status); 1303 1304 hci_dev_unlock(hdev); 1305 1306 return rp->status; 1307 } 1308 1309 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data, 1310 struct sk_buff *skb) 1311 { 1312 struct hci_rp_user_confirm_reply *rp = data; 1313 1314 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1315 1316 hci_dev_lock(hdev); 1317 1318 if (hci_dev_test_flag(hdev, HCI_MGMT)) 1319 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr, 1320 ACL_LINK, 0, rp->status); 1321 1322 hci_dev_unlock(hdev); 1323 1324 return rp->status; 1325 } 1326 1327 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data, 1328 struct sk_buff *skb) 1329 { 1330 struct hci_rp_read_local_oob_data *rp = data; 1331 1332 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1333 1334 return rp->status; 1335 } 1336 1337 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data, 1338 struct sk_buff *skb) 1339 { 1340 struct hci_rp_read_local_oob_ext_data *rp = data; 1341 1342 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1343 1344 return rp->status; 1345 } 1346 1347 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data, 1348 struct sk_buff *skb) 1349 { 1350 struct hci_ev_status *rp = data; 1351 bdaddr_t *sent; 1352 1353 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1354 1355 if (rp->status) 1356 return rp->status; 1357 1358 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR); 1359 if (!sent) 1360 return rp->status; 1361 1362 hci_dev_lock(hdev); 1363 1364 bacpy(&hdev->random_addr, sent); 1365 1366 if (!bacmp(&hdev->rpa, sent)) { 1367 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED); 1368 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, 1369 secs_to_jiffies(hdev->rpa_timeout)); 1370 } 1371 1372 hci_dev_unlock(hdev); 1373 1374 return rp->status; 1375 } 1376 1377 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data, 1378 struct sk_buff *skb) 1379 { 1380 struct hci_ev_status *rp = data; 1381 struct hci_cp_le_set_default_phy *cp; 1382 1383 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1384 1385 if (rp->status) 1386 return rp->status; 1387 1388 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY); 1389 if (!cp) 1390 return rp->status; 1391 1392 hci_dev_lock(hdev); 1393 1394 hdev->le_tx_def_phys = cp->tx_phys; 1395 hdev->le_rx_def_phys = cp->rx_phys; 1396 1397 hci_dev_unlock(hdev); 1398 1399 return rp->status; 1400 } 1401 1402 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data, 1403 struct sk_buff *skb) 1404 { 1405 struct hci_ev_status *rp = data; 1406 struct hci_cp_le_set_adv_set_rand_addr *cp; 1407 struct adv_info *adv; 1408 1409 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1410 1411 if (rp->status) 1412 return rp->status; 1413 1414 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR); 1415 /* Update only in case the adv instance since handle 0x00 shall be using 1416 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and 1417 * non-extended adverting. 1418 */ 1419 if (!cp || !cp->handle) 1420 return rp->status; 1421 1422 hci_dev_lock(hdev); 1423 1424 adv = hci_find_adv_instance(hdev, cp->handle); 1425 if (adv) { 1426 bacpy(&adv->random_addr, &cp->bdaddr); 1427 if (!bacmp(&hdev->rpa, &cp->bdaddr)) { 1428 adv->rpa_expired = false; 1429 queue_delayed_work(hdev->workqueue, 1430 &adv->rpa_expired_cb, 1431 secs_to_jiffies(hdev->rpa_timeout)); 1432 } 1433 } 1434 1435 hci_dev_unlock(hdev); 1436 1437 return rp->status; 1438 } 1439 1440 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data, 1441 struct sk_buff *skb) 1442 { 1443 struct hci_ev_status *rp = data; 1444 u8 *instance; 1445 int err; 1446 1447 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1448 1449 if (rp->status) 1450 return rp->status; 1451 1452 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET); 1453 if (!instance) 1454 return rp->status; 1455 1456 hci_dev_lock(hdev); 1457 1458 err = hci_remove_adv_instance(hdev, *instance); 1459 if (!err) 1460 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev, 1461 *instance); 1462 1463 hci_dev_unlock(hdev); 1464 1465 return rp->status; 1466 } 1467 1468 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data, 1469 struct sk_buff *skb) 1470 { 1471 struct hci_ev_status *rp = data; 1472 struct adv_info *adv, *n; 1473 int err; 1474 1475 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1476 1477 if (rp->status) 1478 return rp->status; 1479 1480 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS)) 1481 return rp->status; 1482 1483 hci_dev_lock(hdev); 1484 1485 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { 1486 u8 instance = adv->instance; 1487 1488 err = hci_remove_adv_instance(hdev, instance); 1489 if (!err) 1490 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), 1491 hdev, instance); 1492 } 1493 1494 hci_dev_unlock(hdev); 1495 1496 return rp->status; 1497 } 1498 1499 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data, 1500 struct sk_buff *skb) 1501 { 1502 struct hci_rp_le_read_transmit_power *rp = data; 1503 1504 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1505 1506 if (rp->status) 1507 return rp->status; 1508 1509 hdev->min_le_tx_power = rp->min_le_tx_power; 1510 hdev->max_le_tx_power = rp->max_le_tx_power; 1511 1512 return rp->status; 1513 } 1514 1515 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data, 1516 struct sk_buff *skb) 1517 { 1518 struct hci_ev_status *rp = data; 1519 struct hci_cp_le_set_privacy_mode *cp; 1520 struct hci_conn_params *params; 1521 1522 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1523 1524 if (rp->status) 1525 return rp->status; 1526 1527 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE); 1528 if (!cp) 1529 return rp->status; 1530 1531 hci_dev_lock(hdev); 1532 1533 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type); 1534 if (params) 1535 WRITE_ONCE(params->privacy_mode, cp->mode); 1536 1537 hci_dev_unlock(hdev); 1538 1539 return rp->status; 1540 } 1541 1542 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data, 1543 struct sk_buff *skb) 1544 { 1545 struct hci_ev_status *rp = data; 1546 __u8 *sent; 1547 1548 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1549 1550 if (rp->status) 1551 return rp->status; 1552 1553 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE); 1554 if (!sent) 1555 return rp->status; 1556 1557 hci_dev_lock(hdev); 1558 1559 /* If we're doing connection initiation as peripheral. Set a 1560 * timeout in case something goes wrong. 1561 */ 1562 if (*sent) { 1563 struct hci_conn *conn; 1564 1565 hci_dev_set_flag(hdev, HCI_LE_ADV); 1566 1567 conn = hci_lookup_le_connect(hdev); 1568 if (conn) 1569 queue_delayed_work(hdev->workqueue, 1570 &conn->le_conn_timeout, 1571 conn->conn_timeout); 1572 } else { 1573 hci_dev_clear_flag(hdev, HCI_LE_ADV); 1574 } 1575 1576 hci_dev_unlock(hdev); 1577 1578 return rp->status; 1579 } 1580 1581 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data, 1582 struct sk_buff *skb) 1583 { 1584 struct hci_cp_le_set_ext_adv_enable *cp; 1585 struct hci_cp_ext_adv_set *set; 1586 struct adv_info *adv = NULL, *n; 1587 struct hci_ev_status *rp = data; 1588 1589 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1590 1591 if (rp->status) 1592 return rp->status; 1593 1594 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE); 1595 if (!cp) 1596 return rp->status; 1597 1598 set = (void *)cp->data; 1599 1600 hci_dev_lock(hdev); 1601 1602 if (cp->num_of_sets) 1603 adv = hci_find_adv_instance(hdev, set->handle); 1604 1605 if (cp->enable) { 1606 struct hci_conn *conn; 1607 1608 hci_dev_set_flag(hdev, HCI_LE_ADV); 1609 1610 if (adv) 1611 adv->enabled = true; 1612 else if (!set->handle) 1613 hci_dev_set_flag(hdev, HCI_LE_ADV_0); 1614 1615 conn = hci_lookup_le_connect(hdev); 1616 if (conn) 1617 queue_delayed_work(hdev->workqueue, 1618 &conn->le_conn_timeout, 1619 conn->conn_timeout); 1620 } else { 1621 if (cp->num_of_sets) { 1622 if (adv) 1623 adv->enabled = false; 1624 else if (!set->handle) 1625 hci_dev_clear_flag(hdev, HCI_LE_ADV_0); 1626 1627 /* If just one instance was disabled check if there are 1628 * any other instance enabled before clearing HCI_LE_ADV 1629 */ 1630 list_for_each_entry_safe(adv, n, &hdev->adv_instances, 1631 list) { 1632 if (adv->enabled) 1633 goto unlock; 1634 } 1635 } else { 1636 /* All instances shall be considered disabled */ 1637 list_for_each_entry_safe(adv, n, &hdev->adv_instances, 1638 list) 1639 adv->enabled = false; 1640 } 1641 1642 hci_dev_clear_flag(hdev, HCI_LE_ADV); 1643 } 1644 1645 unlock: 1646 hci_dev_unlock(hdev); 1647 return rp->status; 1648 } 1649 1650 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data, 1651 struct sk_buff *skb) 1652 { 1653 struct hci_cp_le_set_scan_param *cp; 1654 struct hci_ev_status *rp = data; 1655 1656 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1657 1658 if (rp->status) 1659 return rp->status; 1660 1661 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM); 1662 if (!cp) 1663 return rp->status; 1664 1665 hci_dev_lock(hdev); 1666 1667 hdev->le_scan_type = cp->type; 1668 1669 hci_dev_unlock(hdev); 1670 1671 return rp->status; 1672 } 1673 1674 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data, 1675 struct sk_buff *skb) 1676 { 1677 struct hci_cp_le_set_ext_scan_params *cp; 1678 struct hci_ev_status *rp = data; 1679 struct hci_cp_le_scan_phy_params *phy_param; 1680 1681 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1682 1683 if (rp->status) 1684 return rp->status; 1685 1686 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS); 1687 if (!cp) 1688 return rp->status; 1689 1690 phy_param = (void *)cp->data; 1691 1692 hci_dev_lock(hdev); 1693 1694 hdev->le_scan_type = phy_param->type; 1695 1696 hci_dev_unlock(hdev); 1697 1698 return rp->status; 1699 } 1700 1701 static bool has_pending_adv_report(struct hci_dev *hdev) 1702 { 1703 struct discovery_state *d = &hdev->discovery; 1704 1705 return bacmp(&d->last_adv_addr, BDADDR_ANY); 1706 } 1707 1708 static void clear_pending_adv_report(struct hci_dev *hdev) 1709 { 1710 struct discovery_state *d = &hdev->discovery; 1711 1712 bacpy(&d->last_adv_addr, BDADDR_ANY); 1713 d->last_adv_data_len = 0; 1714 } 1715 1716 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr, 1717 u8 bdaddr_type, s8 rssi, u32 flags, 1718 u8 *data, u8 len) 1719 { 1720 struct discovery_state *d = &hdev->discovery; 1721 1722 if (len > max_adv_len(hdev)) 1723 return; 1724 1725 bacpy(&d->last_adv_addr, bdaddr); 1726 d->last_adv_addr_type = bdaddr_type; 1727 d->last_adv_rssi = rssi; 1728 d->last_adv_flags = flags; 1729 memcpy(d->last_adv_data, data, len); 1730 d->last_adv_data_len = len; 1731 } 1732 1733 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable) 1734 { 1735 hci_dev_lock(hdev); 1736 1737 switch (enable) { 1738 case LE_SCAN_ENABLE: 1739 hci_dev_set_flag(hdev, HCI_LE_SCAN); 1740 if (hdev->le_scan_type == LE_SCAN_ACTIVE) { 1741 clear_pending_adv_report(hdev); 1742 hci_discovery_set_state(hdev, DISCOVERY_FINDING); 1743 } 1744 break; 1745 1746 case LE_SCAN_DISABLE: 1747 /* We do this here instead of when setting DISCOVERY_STOPPED 1748 * since the latter would potentially require waiting for 1749 * inquiry to stop too. 1750 */ 1751 if (has_pending_adv_report(hdev)) { 1752 struct discovery_state *d = &hdev->discovery; 1753 1754 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, 1755 d->last_adv_addr_type, NULL, 1756 d->last_adv_rssi, d->last_adv_flags, 1757 d->last_adv_data, 1758 d->last_adv_data_len, NULL, 0, 0); 1759 } 1760 1761 /* Cancel this timer so that we don't try to disable scanning 1762 * when it's already disabled. 1763 */ 1764 cancel_delayed_work(&hdev->le_scan_disable); 1765 1766 hci_dev_clear_flag(hdev, HCI_LE_SCAN); 1767 1768 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we 1769 * interrupted scanning due to a connect request. Mark 1770 * therefore discovery as stopped. 1771 */ 1772 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED)) 1773 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 1774 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) && 1775 hdev->discovery.state == DISCOVERY_FINDING) 1776 queue_work(hdev->workqueue, &hdev->reenable_adv_work); 1777 1778 break; 1779 1780 default: 1781 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d", 1782 enable); 1783 break; 1784 } 1785 1786 hci_dev_unlock(hdev); 1787 } 1788 1789 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data, 1790 struct sk_buff *skb) 1791 { 1792 struct hci_cp_le_set_scan_enable *cp; 1793 struct hci_ev_status *rp = data; 1794 1795 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1796 1797 if (rp->status) 1798 return rp->status; 1799 1800 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE); 1801 if (!cp) 1802 return rp->status; 1803 1804 le_set_scan_enable_complete(hdev, cp->enable); 1805 1806 return rp->status; 1807 } 1808 1809 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data, 1810 struct sk_buff *skb) 1811 { 1812 struct hci_cp_le_set_ext_scan_enable *cp; 1813 struct hci_ev_status *rp = data; 1814 1815 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1816 1817 if (rp->status) 1818 return rp->status; 1819 1820 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE); 1821 if (!cp) 1822 return rp->status; 1823 1824 le_set_scan_enable_complete(hdev, cp->enable); 1825 1826 return rp->status; 1827 } 1828 1829 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data, 1830 struct sk_buff *skb) 1831 { 1832 struct hci_rp_le_read_num_supported_adv_sets *rp = data; 1833 1834 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status, 1835 rp->num_of_sets); 1836 1837 if (rp->status) 1838 return rp->status; 1839 1840 hdev->le_num_of_adv_sets = rp->num_of_sets; 1841 1842 return rp->status; 1843 } 1844 1845 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data, 1846 struct sk_buff *skb) 1847 { 1848 struct hci_rp_le_read_accept_list_size *rp = data; 1849 1850 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size); 1851 1852 if (rp->status) 1853 return rp->status; 1854 1855 hdev->le_accept_list_size = rp->size; 1856 1857 return rp->status; 1858 } 1859 1860 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data, 1861 struct sk_buff *skb) 1862 { 1863 struct hci_ev_status *rp = data; 1864 1865 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1866 1867 if (rp->status) 1868 return rp->status; 1869 1870 hci_dev_lock(hdev); 1871 hci_bdaddr_list_clear(&hdev->le_accept_list); 1872 hci_dev_unlock(hdev); 1873 1874 return rp->status; 1875 } 1876 1877 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data, 1878 struct sk_buff *skb) 1879 { 1880 struct hci_cp_le_add_to_accept_list *sent; 1881 struct hci_ev_status *rp = data; 1882 1883 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1884 1885 if (rp->status) 1886 return rp->status; 1887 1888 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST); 1889 if (!sent) 1890 return rp->status; 1891 1892 hci_dev_lock(hdev); 1893 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr, 1894 sent->bdaddr_type); 1895 hci_dev_unlock(hdev); 1896 1897 return rp->status; 1898 } 1899 1900 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data, 1901 struct sk_buff *skb) 1902 { 1903 struct hci_cp_le_del_from_accept_list *sent; 1904 struct hci_ev_status *rp = data; 1905 1906 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1907 1908 if (rp->status) 1909 return rp->status; 1910 1911 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST); 1912 if (!sent) 1913 return rp->status; 1914 1915 hci_dev_lock(hdev); 1916 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr, 1917 sent->bdaddr_type); 1918 hci_dev_unlock(hdev); 1919 1920 return rp->status; 1921 } 1922 1923 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data, 1924 struct sk_buff *skb) 1925 { 1926 struct hci_rp_le_read_supported_states *rp = data; 1927 1928 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1929 1930 if (rp->status) 1931 return rp->status; 1932 1933 memcpy(hdev->le_states, rp->le_states, 8); 1934 1935 return rp->status; 1936 } 1937 1938 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data, 1939 struct sk_buff *skb) 1940 { 1941 struct hci_rp_le_read_def_data_len *rp = data; 1942 1943 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1944 1945 if (rp->status) 1946 return rp->status; 1947 1948 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len); 1949 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time); 1950 1951 return rp->status; 1952 } 1953 1954 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data, 1955 struct sk_buff *skb) 1956 { 1957 struct hci_cp_le_write_def_data_len *sent; 1958 struct hci_ev_status *rp = data; 1959 1960 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1961 1962 if (rp->status) 1963 return rp->status; 1964 1965 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN); 1966 if (!sent) 1967 return rp->status; 1968 1969 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len); 1970 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time); 1971 1972 return rp->status; 1973 } 1974 1975 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data, 1976 struct sk_buff *skb) 1977 { 1978 struct hci_cp_le_add_to_resolv_list *sent; 1979 struct hci_ev_status *rp = data; 1980 1981 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 1982 1983 if (rp->status) 1984 return rp->status; 1985 1986 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST); 1987 if (!sent) 1988 return rp->status; 1989 1990 hci_dev_lock(hdev); 1991 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr, 1992 sent->bdaddr_type, sent->peer_irk, 1993 sent->local_irk); 1994 hci_dev_unlock(hdev); 1995 1996 return rp->status; 1997 } 1998 1999 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data, 2000 struct sk_buff *skb) 2001 { 2002 struct hci_cp_le_del_from_resolv_list *sent; 2003 struct hci_ev_status *rp = data; 2004 2005 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2006 2007 if (rp->status) 2008 return rp->status; 2009 2010 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST); 2011 if (!sent) 2012 return rp->status; 2013 2014 hci_dev_lock(hdev); 2015 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr, 2016 sent->bdaddr_type); 2017 hci_dev_unlock(hdev); 2018 2019 return rp->status; 2020 } 2021 2022 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data, 2023 struct sk_buff *skb) 2024 { 2025 struct hci_ev_status *rp = data; 2026 2027 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2028 2029 if (rp->status) 2030 return rp->status; 2031 2032 hci_dev_lock(hdev); 2033 hci_bdaddr_list_clear(&hdev->le_resolv_list); 2034 hci_dev_unlock(hdev); 2035 2036 return rp->status; 2037 } 2038 2039 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data, 2040 struct sk_buff *skb) 2041 { 2042 struct hci_rp_le_read_resolv_list_size *rp = data; 2043 2044 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size); 2045 2046 if (rp->status) 2047 return rp->status; 2048 2049 hdev->le_resolv_list_size = rp->size; 2050 2051 return rp->status; 2052 } 2053 2054 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data, 2055 struct sk_buff *skb) 2056 { 2057 struct hci_ev_status *rp = data; 2058 __u8 *sent; 2059 2060 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2061 2062 if (rp->status) 2063 return rp->status; 2064 2065 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE); 2066 if (!sent) 2067 return rp->status; 2068 2069 hci_dev_lock(hdev); 2070 2071 if (*sent) 2072 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION); 2073 else 2074 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION); 2075 2076 hci_dev_unlock(hdev); 2077 2078 return rp->status; 2079 } 2080 2081 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data, 2082 struct sk_buff *skb) 2083 { 2084 struct hci_rp_le_read_max_data_len *rp = data; 2085 2086 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2087 2088 if (rp->status) 2089 return rp->status; 2090 2091 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len); 2092 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time); 2093 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len); 2094 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time); 2095 2096 return rp->status; 2097 } 2098 2099 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data, 2100 struct sk_buff *skb) 2101 { 2102 struct hci_cp_write_le_host_supported *sent; 2103 struct hci_ev_status *rp = data; 2104 2105 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2106 2107 if (rp->status) 2108 return rp->status; 2109 2110 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED); 2111 if (!sent) 2112 return rp->status; 2113 2114 hci_dev_lock(hdev); 2115 2116 if (sent->le) { 2117 hdev->features[1][0] |= LMP_HOST_LE; 2118 hci_dev_set_flag(hdev, HCI_LE_ENABLED); 2119 } else { 2120 hdev->features[1][0] &= ~LMP_HOST_LE; 2121 hci_dev_clear_flag(hdev, HCI_LE_ENABLED); 2122 hci_dev_clear_flag(hdev, HCI_ADVERTISING); 2123 } 2124 2125 if (sent->simul) 2126 hdev->features[1][0] |= LMP_HOST_LE_BREDR; 2127 else 2128 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR; 2129 2130 hci_dev_unlock(hdev); 2131 2132 return rp->status; 2133 } 2134 2135 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data, 2136 struct sk_buff *skb) 2137 { 2138 struct hci_cp_le_set_adv_param *cp; 2139 struct hci_ev_status *rp = data; 2140 2141 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2142 2143 if (rp->status) 2144 return rp->status; 2145 2146 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM); 2147 if (!cp) 2148 return rp->status; 2149 2150 hci_dev_lock(hdev); 2151 hdev->adv_addr_type = cp->own_address_type; 2152 hci_dev_unlock(hdev); 2153 2154 return rp->status; 2155 } 2156 2157 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data, 2158 struct sk_buff *skb) 2159 { 2160 struct hci_rp_read_rssi *rp = data; 2161 struct hci_conn *conn; 2162 2163 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2164 2165 if (rp->status) 2166 return rp->status; 2167 2168 hci_dev_lock(hdev); 2169 2170 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 2171 if (conn) 2172 conn->rssi = rp->rssi; 2173 2174 hci_dev_unlock(hdev); 2175 2176 return rp->status; 2177 } 2178 2179 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data, 2180 struct sk_buff *skb) 2181 { 2182 struct hci_cp_read_tx_power *sent; 2183 struct hci_rp_read_tx_power *rp = data; 2184 struct hci_conn *conn; 2185 2186 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2187 2188 if (rp->status) 2189 return rp->status; 2190 2191 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER); 2192 if (!sent) 2193 return rp->status; 2194 2195 hci_dev_lock(hdev); 2196 2197 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle)); 2198 if (!conn) 2199 goto unlock; 2200 2201 switch (sent->type) { 2202 case 0x00: 2203 conn->tx_power = rp->tx_power; 2204 break; 2205 case 0x01: 2206 conn->max_tx_power = rp->tx_power; 2207 break; 2208 } 2209 2210 unlock: 2211 hci_dev_unlock(hdev); 2212 return rp->status; 2213 } 2214 2215 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data, 2216 struct sk_buff *skb) 2217 { 2218 struct hci_ev_status *rp = data; 2219 u8 *mode; 2220 2221 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 2222 2223 if (rp->status) 2224 return rp->status; 2225 2226 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE); 2227 if (mode) 2228 hdev->ssp_debug_mode = *mode; 2229 2230 return rp->status; 2231 } 2232 2233 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status) 2234 { 2235 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2236 2237 if (status) 2238 return; 2239 2240 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY)) 2241 set_bit(HCI_INQUIRY, &hdev->flags); 2242 } 2243 2244 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status) 2245 { 2246 struct hci_cp_create_conn *cp; 2247 struct hci_conn *conn; 2248 2249 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2250 2251 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN); 2252 if (!cp) 2253 return; 2254 2255 hci_dev_lock(hdev); 2256 2257 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 2258 2259 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn); 2260 2261 if (status) { 2262 if (conn && conn->state == BT_CONNECT) { 2263 conn->state = BT_CLOSED; 2264 hci_connect_cfm(conn, status); 2265 hci_conn_del(conn); 2266 } 2267 } else { 2268 if (!conn) { 2269 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr, 2270 0, HCI_ROLE_MASTER); 2271 if (IS_ERR(conn)) 2272 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 2273 } 2274 } 2275 2276 hci_dev_unlock(hdev); 2277 } 2278 2279 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status) 2280 { 2281 struct hci_cp_add_sco *cp; 2282 struct hci_conn *acl; 2283 struct hci_link *link; 2284 __u16 handle; 2285 2286 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2287 2288 if (!status) 2289 return; 2290 2291 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO); 2292 if (!cp) 2293 return; 2294 2295 handle = __le16_to_cpu(cp->handle); 2296 2297 bt_dev_dbg(hdev, "handle 0x%4.4x", handle); 2298 2299 hci_dev_lock(hdev); 2300 2301 acl = hci_conn_hash_lookup_handle(hdev, handle); 2302 if (acl) { 2303 link = list_first_entry_or_null(&acl->link_list, 2304 struct hci_link, list); 2305 if (link && link->conn) { 2306 link->conn->state = BT_CLOSED; 2307 2308 hci_connect_cfm(link->conn, status); 2309 hci_conn_del(link->conn); 2310 } 2311 } 2312 2313 hci_dev_unlock(hdev); 2314 } 2315 2316 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status) 2317 { 2318 struct hci_cp_auth_requested *cp; 2319 struct hci_conn *conn; 2320 2321 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2322 2323 if (!status) 2324 return; 2325 2326 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED); 2327 if (!cp) 2328 return; 2329 2330 hci_dev_lock(hdev); 2331 2332 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2333 if (conn) { 2334 if (conn->state == BT_CONFIG) { 2335 hci_connect_cfm(conn, status); 2336 hci_conn_drop(conn); 2337 } 2338 } 2339 2340 hci_dev_unlock(hdev); 2341 } 2342 2343 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status) 2344 { 2345 struct hci_cp_set_conn_encrypt *cp; 2346 struct hci_conn *conn; 2347 2348 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2349 2350 if (!status) 2351 return; 2352 2353 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT); 2354 if (!cp) 2355 return; 2356 2357 hci_dev_lock(hdev); 2358 2359 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2360 if (conn) { 2361 if (conn->state == BT_CONFIG) { 2362 hci_connect_cfm(conn, status); 2363 hci_conn_drop(conn); 2364 } 2365 } 2366 2367 hci_dev_unlock(hdev); 2368 } 2369 2370 static int hci_outgoing_auth_needed(struct hci_dev *hdev, 2371 struct hci_conn *conn) 2372 { 2373 if (conn->state != BT_CONFIG || !conn->out) 2374 return 0; 2375 2376 if (conn->pending_sec_level == BT_SECURITY_SDP) 2377 return 0; 2378 2379 /* Only request authentication for SSP connections or non-SSP 2380 * devices with sec_level MEDIUM or HIGH or if MITM protection 2381 * is requested. 2382 */ 2383 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) && 2384 conn->pending_sec_level != BT_SECURITY_FIPS && 2385 conn->pending_sec_level != BT_SECURITY_HIGH && 2386 conn->pending_sec_level != BT_SECURITY_MEDIUM) 2387 return 0; 2388 2389 return 1; 2390 } 2391 2392 static int hci_resolve_name(struct hci_dev *hdev, 2393 struct inquiry_entry *e) 2394 { 2395 struct hci_cp_remote_name_req cp; 2396 2397 memset(&cp, 0, sizeof(cp)); 2398 2399 bacpy(&cp.bdaddr, &e->data.bdaddr); 2400 cp.pscan_rep_mode = e->data.pscan_rep_mode; 2401 cp.pscan_mode = e->data.pscan_mode; 2402 cp.clock_offset = e->data.clock_offset; 2403 2404 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); 2405 } 2406 2407 static bool hci_resolve_next_name(struct hci_dev *hdev) 2408 { 2409 struct discovery_state *discov = &hdev->discovery; 2410 struct inquiry_entry *e; 2411 2412 if (list_empty(&discov->resolve)) 2413 return false; 2414 2415 /* We should stop if we already spent too much time resolving names. */ 2416 if (time_after(jiffies, discov->name_resolve_timeout)) { 2417 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long."); 2418 return false; 2419 } 2420 2421 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED); 2422 if (!e) 2423 return false; 2424 2425 if (hci_resolve_name(hdev, e) == 0) { 2426 e->name_state = NAME_PENDING; 2427 return true; 2428 } 2429 2430 return false; 2431 } 2432 2433 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn, 2434 bdaddr_t *bdaddr, u8 *name, u8 name_len) 2435 { 2436 struct discovery_state *discov = &hdev->discovery; 2437 struct inquiry_entry *e; 2438 2439 /* Update the mgmt connected state if necessary. Be careful with 2440 * conn objects that exist but are not (yet) connected however. 2441 * Only those in BT_CONFIG or BT_CONNECTED states can be 2442 * considered connected. 2443 */ 2444 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED)) 2445 mgmt_device_connected(hdev, conn, name, name_len); 2446 2447 if (discov->state == DISCOVERY_STOPPED) 2448 return; 2449 2450 if (discov->state == DISCOVERY_STOPPING) 2451 goto discov_complete; 2452 2453 if (discov->state != DISCOVERY_RESOLVING) 2454 return; 2455 2456 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING); 2457 /* If the device was not found in a list of found devices names of which 2458 * are pending. there is no need to continue resolving a next name as it 2459 * will be done upon receiving another Remote Name Request Complete 2460 * Event */ 2461 if (!e) 2462 return; 2463 2464 list_del(&e->list); 2465 2466 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN; 2467 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi, 2468 name, name_len); 2469 2470 if (hci_resolve_next_name(hdev)) 2471 return; 2472 2473 discov_complete: 2474 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 2475 } 2476 2477 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status) 2478 { 2479 struct hci_cp_remote_name_req *cp; 2480 struct hci_conn *conn; 2481 2482 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2483 2484 /* If successful wait for the name req complete event before 2485 * checking for the need to do authentication */ 2486 if (!status) 2487 return; 2488 2489 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ); 2490 if (!cp) 2491 return; 2492 2493 hci_dev_lock(hdev); 2494 2495 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 2496 2497 if (hci_dev_test_flag(hdev, HCI_MGMT)) 2498 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0); 2499 2500 if (!conn) 2501 goto unlock; 2502 2503 if (!hci_outgoing_auth_needed(hdev, conn)) 2504 goto unlock; 2505 2506 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { 2507 struct hci_cp_auth_requested auth_cp; 2508 2509 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); 2510 2511 auth_cp.handle = __cpu_to_le16(conn->handle); 2512 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, 2513 sizeof(auth_cp), &auth_cp); 2514 } 2515 2516 unlock: 2517 hci_dev_unlock(hdev); 2518 } 2519 2520 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status) 2521 { 2522 struct hci_cp_read_remote_features *cp; 2523 struct hci_conn *conn; 2524 2525 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2526 2527 if (!status) 2528 return; 2529 2530 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES); 2531 if (!cp) 2532 return; 2533 2534 hci_dev_lock(hdev); 2535 2536 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2537 if (conn) { 2538 if (conn->state == BT_CONFIG) { 2539 hci_connect_cfm(conn, status); 2540 hci_conn_drop(conn); 2541 } 2542 } 2543 2544 hci_dev_unlock(hdev); 2545 } 2546 2547 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status) 2548 { 2549 struct hci_cp_read_remote_ext_features *cp; 2550 struct hci_conn *conn; 2551 2552 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2553 2554 if (!status) 2555 return; 2556 2557 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES); 2558 if (!cp) 2559 return; 2560 2561 hci_dev_lock(hdev); 2562 2563 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2564 if (conn) { 2565 if (conn->state == BT_CONFIG) { 2566 hci_connect_cfm(conn, status); 2567 hci_conn_drop(conn); 2568 } 2569 } 2570 2571 hci_dev_unlock(hdev); 2572 } 2573 2574 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle, 2575 __u8 status) 2576 { 2577 struct hci_conn *acl; 2578 struct hci_link *link; 2579 2580 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status); 2581 2582 hci_dev_lock(hdev); 2583 2584 acl = hci_conn_hash_lookup_handle(hdev, handle); 2585 if (acl) { 2586 link = list_first_entry_or_null(&acl->link_list, 2587 struct hci_link, list); 2588 if (link && link->conn) { 2589 link->conn->state = BT_CLOSED; 2590 2591 hci_connect_cfm(link->conn, status); 2592 hci_conn_del(link->conn); 2593 } 2594 } 2595 2596 hci_dev_unlock(hdev); 2597 } 2598 2599 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status) 2600 { 2601 struct hci_cp_setup_sync_conn *cp; 2602 2603 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2604 2605 if (!status) 2606 return; 2607 2608 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN); 2609 if (!cp) 2610 return; 2611 2612 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status); 2613 } 2614 2615 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status) 2616 { 2617 struct hci_cp_enhanced_setup_sync_conn *cp; 2618 2619 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2620 2621 if (!status) 2622 return; 2623 2624 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN); 2625 if (!cp) 2626 return; 2627 2628 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status); 2629 } 2630 2631 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status) 2632 { 2633 struct hci_cp_sniff_mode *cp; 2634 struct hci_conn *conn; 2635 2636 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2637 2638 if (!status) 2639 return; 2640 2641 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE); 2642 if (!cp) 2643 return; 2644 2645 hci_dev_lock(hdev); 2646 2647 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2648 if (conn) { 2649 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags); 2650 2651 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) 2652 hci_sco_setup(conn, status); 2653 } 2654 2655 hci_dev_unlock(hdev); 2656 } 2657 2658 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status) 2659 { 2660 struct hci_cp_exit_sniff_mode *cp; 2661 struct hci_conn *conn; 2662 2663 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2664 2665 if (!status) 2666 return; 2667 2668 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE); 2669 if (!cp) 2670 return; 2671 2672 hci_dev_lock(hdev); 2673 2674 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2675 if (conn) { 2676 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags); 2677 2678 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) 2679 hci_sco_setup(conn, status); 2680 } 2681 2682 hci_dev_unlock(hdev); 2683 } 2684 2685 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status) 2686 { 2687 struct hci_cp_disconnect *cp; 2688 struct hci_conn_params *params; 2689 struct hci_conn *conn; 2690 bool mgmt_conn; 2691 2692 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2693 2694 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended 2695 * otherwise cleanup the connection immediately. 2696 */ 2697 if (!status && !hdev->suspended) 2698 return; 2699 2700 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT); 2701 if (!cp) 2702 return; 2703 2704 hci_dev_lock(hdev); 2705 2706 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2707 if (!conn) 2708 goto unlock; 2709 2710 if (status && status != HCI_ERROR_UNKNOWN_CONN_ID) { 2711 mgmt_disconnect_failed(hdev, &conn->dst, conn->type, 2712 conn->dst_type, status); 2713 2714 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) { 2715 hdev->cur_adv_instance = conn->adv_instance; 2716 hci_enable_advertising(hdev); 2717 } 2718 2719 /* Inform sockets conn is gone before we delete it */ 2720 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED); 2721 2722 goto done; 2723 } 2724 2725 /* During suspend, mark connection as closed immediately 2726 * since we might not receive HCI_EV_DISCONN_COMPLETE 2727 */ 2728 if (hdev->suspended) 2729 conn->state = BT_CLOSED; 2730 2731 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags); 2732 2733 if (conn->type == ACL_LINK) { 2734 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) 2735 hci_remove_link_key(hdev, &conn->dst); 2736 } 2737 2738 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); 2739 if (params) { 2740 switch (params->auto_connect) { 2741 case HCI_AUTO_CONN_LINK_LOSS: 2742 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT) 2743 break; 2744 fallthrough; 2745 2746 case HCI_AUTO_CONN_DIRECT: 2747 case HCI_AUTO_CONN_ALWAYS: 2748 hci_pend_le_list_del_init(params); 2749 hci_pend_le_list_add(params, &hdev->pend_le_conns); 2750 break; 2751 2752 default: 2753 break; 2754 } 2755 } 2756 2757 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type, 2758 cp->reason, mgmt_conn); 2759 2760 hci_disconn_cfm(conn, cp->reason); 2761 2762 done: 2763 /* If the disconnection failed for any reason, the upper layer 2764 * does not retry to disconnect in current implementation. 2765 * Hence, we need to do some basic cleanup here and re-enable 2766 * advertising if necessary. 2767 */ 2768 hci_conn_del(conn); 2769 unlock: 2770 hci_dev_unlock(hdev); 2771 } 2772 2773 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved) 2774 { 2775 /* When using controller based address resolution, then the new 2776 * address types 0x02 and 0x03 are used. These types need to be 2777 * converted back into either public address or random address type 2778 */ 2779 switch (type) { 2780 case ADDR_LE_DEV_PUBLIC_RESOLVED: 2781 if (resolved) 2782 *resolved = true; 2783 return ADDR_LE_DEV_PUBLIC; 2784 case ADDR_LE_DEV_RANDOM_RESOLVED: 2785 if (resolved) 2786 *resolved = true; 2787 return ADDR_LE_DEV_RANDOM; 2788 } 2789 2790 if (resolved) 2791 *resolved = false; 2792 return type; 2793 } 2794 2795 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr, 2796 u8 peer_addr_type, u8 own_address_type, 2797 u8 filter_policy) 2798 { 2799 struct hci_conn *conn; 2800 2801 conn = hci_conn_hash_lookup_le(hdev, peer_addr, 2802 peer_addr_type); 2803 if (!conn) 2804 return; 2805 2806 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL); 2807 2808 /* Store the initiator and responder address information which 2809 * is needed for SMP. These values will not change during the 2810 * lifetime of the connection. 2811 */ 2812 conn->init_addr_type = own_address_type; 2813 if (own_address_type == ADDR_LE_DEV_RANDOM) 2814 bacpy(&conn->init_addr, &hdev->random_addr); 2815 else 2816 bacpy(&conn->init_addr, &hdev->bdaddr); 2817 2818 conn->resp_addr_type = peer_addr_type; 2819 bacpy(&conn->resp_addr, peer_addr); 2820 } 2821 2822 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status) 2823 { 2824 struct hci_cp_le_create_conn *cp; 2825 2826 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2827 2828 /* All connection failure handling is taken care of by the 2829 * hci_conn_failed function which is triggered by the HCI 2830 * request completion callbacks used for connecting. 2831 */ 2832 if (status) 2833 return; 2834 2835 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN); 2836 if (!cp) 2837 return; 2838 2839 hci_dev_lock(hdev); 2840 2841 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type, 2842 cp->own_address_type, cp->filter_policy); 2843 2844 hci_dev_unlock(hdev); 2845 } 2846 2847 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status) 2848 { 2849 struct hci_cp_le_ext_create_conn *cp; 2850 2851 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2852 2853 /* All connection failure handling is taken care of by the 2854 * hci_conn_failed function which is triggered by the HCI 2855 * request completion callbacks used for connecting. 2856 */ 2857 if (status) 2858 return; 2859 2860 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN); 2861 if (!cp) 2862 return; 2863 2864 hci_dev_lock(hdev); 2865 2866 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type, 2867 cp->own_addr_type, cp->filter_policy); 2868 2869 hci_dev_unlock(hdev); 2870 } 2871 2872 static void hci_cs_le_set_phy(struct hci_dev *hdev, u8 status) 2873 { 2874 struct hci_cp_le_set_phy *cp; 2875 struct hci_conn *conn; 2876 2877 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2878 2879 if (status) 2880 return; 2881 2882 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PHY); 2883 if (!cp) 2884 return; 2885 2886 hci_dev_lock(hdev); 2887 2888 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2889 if (conn) { 2890 conn->le_tx_def_phys = cp->tx_phys; 2891 conn->le_rx_def_phys = cp->rx_phys; 2892 } 2893 2894 hci_dev_unlock(hdev); 2895 } 2896 2897 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status) 2898 { 2899 struct hci_cp_le_read_remote_features *cp; 2900 struct hci_conn *conn; 2901 2902 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2903 2904 if (!status) 2905 return; 2906 2907 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES); 2908 if (!cp) 2909 return; 2910 2911 hci_dev_lock(hdev); 2912 2913 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2914 if (conn && conn->state == BT_CONFIG) 2915 hci_connect_cfm(conn, status); 2916 2917 hci_dev_unlock(hdev); 2918 } 2919 2920 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status) 2921 { 2922 struct hci_cp_le_start_enc *cp; 2923 struct hci_conn *conn; 2924 2925 bt_dev_dbg(hdev, "status 0x%2.2x", status); 2926 2927 if (!status) 2928 return; 2929 2930 hci_dev_lock(hdev); 2931 2932 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC); 2933 if (!cp) 2934 goto unlock; 2935 2936 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 2937 if (!conn) 2938 goto unlock; 2939 2940 if (conn->state != BT_CONNECTED) 2941 goto unlock; 2942 2943 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 2944 hci_conn_drop(conn); 2945 2946 unlock: 2947 hci_dev_unlock(hdev); 2948 } 2949 2950 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status) 2951 { 2952 struct hci_cp_switch_role *cp; 2953 struct hci_conn *conn; 2954 2955 BT_DBG("%s status 0x%2.2x", hdev->name, status); 2956 2957 if (!status) 2958 return; 2959 2960 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE); 2961 if (!cp) 2962 return; 2963 2964 hci_dev_lock(hdev); 2965 2966 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr); 2967 if (conn) 2968 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags); 2969 2970 hci_dev_unlock(hdev); 2971 } 2972 2973 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data, 2974 struct sk_buff *skb) 2975 { 2976 struct hci_ev_status *ev = data; 2977 struct discovery_state *discov = &hdev->discovery; 2978 struct inquiry_entry *e; 2979 2980 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 2981 2982 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags)) 2983 return; 2984 2985 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */ 2986 wake_up_bit(&hdev->flags, HCI_INQUIRY); 2987 2988 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 2989 return; 2990 2991 hci_dev_lock(hdev); 2992 2993 if (discov->state != DISCOVERY_FINDING) 2994 goto unlock; 2995 2996 if (list_empty(&discov->resolve)) { 2997 /* When BR/EDR inquiry is active and no LE scanning is in 2998 * progress, then change discovery state to indicate completion. 2999 * 3000 * When running LE scanning and BR/EDR inquiry simultaneously 3001 * and the LE scan already finished, then change the discovery 3002 * state to indicate completion. 3003 */ 3004 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || 3005 !hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY)) 3006 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 3007 goto unlock; 3008 } 3009 3010 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED); 3011 if (e && hci_resolve_name(hdev, e) == 0) { 3012 e->name_state = NAME_PENDING; 3013 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING); 3014 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION; 3015 } else { 3016 /* When BR/EDR inquiry is active and no LE scanning is in 3017 * progress, then change discovery state to indicate completion. 3018 * 3019 * When running LE scanning and BR/EDR inquiry simultaneously 3020 * and the LE scan already finished, then change the discovery 3021 * state to indicate completion. 3022 */ 3023 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) || 3024 !hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY)) 3025 hci_discovery_set_state(hdev, DISCOVERY_STOPPED); 3026 } 3027 3028 unlock: 3029 hci_dev_unlock(hdev); 3030 } 3031 3032 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata, 3033 struct sk_buff *skb) 3034 { 3035 struct hci_ev_inquiry_result *ev = edata; 3036 struct inquiry_data data; 3037 int i; 3038 3039 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT, 3040 flex_array_size(ev, info, ev->num))) 3041 return; 3042 3043 bt_dev_dbg(hdev, "num %d", ev->num); 3044 3045 if (!ev->num) 3046 return; 3047 3048 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) 3049 return; 3050 3051 hci_dev_lock(hdev); 3052 3053 for (i = 0; i < ev->num; i++) { 3054 struct inquiry_info *info = &ev->info[i]; 3055 u32 flags; 3056 3057 bacpy(&data.bdaddr, &info->bdaddr); 3058 data.pscan_rep_mode = info->pscan_rep_mode; 3059 data.pscan_period_mode = info->pscan_period_mode; 3060 data.pscan_mode = info->pscan_mode; 3061 memcpy(data.dev_class, info->dev_class, 3); 3062 data.clock_offset = info->clock_offset; 3063 data.rssi = HCI_RSSI_INVALID; 3064 data.ssp_mode = 0x00; 3065 3066 flags = hci_inquiry_cache_update(hdev, &data, false); 3067 3068 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 3069 info->dev_class, HCI_RSSI_INVALID, 3070 flags, NULL, 0, NULL, 0, 0); 3071 } 3072 3073 hci_dev_unlock(hdev); 3074 } 3075 3076 static int hci_read_enc_key_size(struct hci_dev *hdev, struct hci_conn *conn) 3077 { 3078 struct hci_cp_read_enc_key_size cp; 3079 u8 *key_enc_size = hci_conn_key_enc_size(conn); 3080 3081 if (!read_key_size_capable(hdev)) { 3082 conn->enc_key_size = HCI_LINK_KEY_SIZE; 3083 return -EOPNOTSUPP; 3084 } 3085 3086 bt_dev_dbg(hdev, "hcon %p", conn); 3087 3088 memset(&cp, 0, sizeof(cp)); 3089 cp.handle = cpu_to_le16(conn->handle); 3090 3091 /* If the key enc_size is already known, use it as conn->enc_key_size, 3092 * otherwise use hdev->min_enc_key_size so the likes of 3093 * l2cap_check_enc_key_size don't fail while waiting for 3094 * HCI_OP_READ_ENC_KEY_SIZE response. 3095 */ 3096 if (key_enc_size && *key_enc_size) 3097 conn->enc_key_size = *key_enc_size; 3098 else 3099 conn->enc_key_size = hdev->min_enc_key_size; 3100 3101 return hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp); 3102 } 3103 3104 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data, 3105 struct sk_buff *skb) 3106 { 3107 struct hci_ev_conn_complete *ev = data; 3108 struct hci_conn *conn; 3109 u8 status = ev->status; 3110 3111 bt_dev_dbg(hdev, "status 0x%2.2x", status); 3112 3113 hci_dev_lock(hdev); 3114 3115 /* Check for existing connection: 3116 * 3117 * 1. If it doesn't exist then it must be receiver/slave role. 3118 * 2. If it does exist confirm that it is connecting/BT_CONNECT in case 3119 * of initiator/master role since there could be a collision where 3120 * either side is attempting to connect or something like a fuzzing 3121 * testing is trying to play tricks to destroy the hcon object before 3122 * it even attempts to connect (e.g. hcon->state == BT_OPEN). 3123 */ 3124 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr); 3125 if (!conn || 3126 (conn->role == HCI_ROLE_MASTER && conn->state != BT_CONNECT)) { 3127 /* In case of error status and there is no connection pending 3128 * just unlock as there is nothing to cleanup. 3129 */ 3130 if (ev->status) 3131 goto unlock; 3132 3133 /* Connection may not exist if auto-connected. Check the bredr 3134 * allowlist to see if this device is allowed to auto connect. 3135 * If link is an ACL type, create a connection class 3136 * automatically. 3137 * 3138 * Auto-connect will only occur if the event filter is 3139 * programmed with a given address. Right now, event filter is 3140 * only used during suspend. 3141 */ 3142 if (ev->link_type == ACL_LINK && 3143 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, 3144 &ev->bdaddr, 3145 BDADDR_BREDR)) { 3146 conn = hci_conn_add_unset(hdev, ev->link_type, 3147 &ev->bdaddr, 0, 3148 HCI_ROLE_SLAVE); 3149 if (IS_ERR(conn)) { 3150 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 3151 goto unlock; 3152 } 3153 } else { 3154 if (ev->link_type != SCO_LINK) 3155 goto unlock; 3156 3157 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, 3158 &ev->bdaddr); 3159 if (!conn) 3160 goto unlock; 3161 3162 conn->type = SCO_LINK; 3163 } 3164 } 3165 3166 /* The HCI_Connection_Complete event is only sent once per connection. 3167 * Processing it more than once per connection can corrupt kernel memory. 3168 * 3169 * As the connection handle is set here for the first time, it indicates 3170 * whether the connection is already set up. 3171 */ 3172 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { 3173 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection"); 3174 goto unlock; 3175 } 3176 3177 if (!status) { 3178 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle)); 3179 if (status) 3180 goto done; 3181 3182 if (conn->type == ACL_LINK) { 3183 conn->state = BT_CONFIG; 3184 hci_conn_hold(conn); 3185 3186 if (!conn->out && !hci_conn_ssp_enabled(conn) && 3187 !hci_find_link_key(hdev, &ev->bdaddr)) 3188 conn->disc_timeout = HCI_PAIRING_TIMEOUT; 3189 else 3190 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 3191 } else 3192 conn->state = BT_CONNECTED; 3193 3194 hci_debugfs_create_conn(conn); 3195 hci_conn_add_sysfs(conn); 3196 3197 if (test_bit(HCI_AUTH, &hdev->flags)) 3198 set_bit(HCI_CONN_AUTH, &conn->flags); 3199 3200 if (test_bit(HCI_ENCRYPT, &hdev->flags)) 3201 set_bit(HCI_CONN_ENCRYPT, &conn->flags); 3202 3203 /* "Link key request" completed ahead of "connect request" completes */ 3204 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) && 3205 ev->link_type == ACL_LINK) { 3206 struct link_key *key; 3207 3208 key = hci_find_link_key(hdev, &ev->bdaddr); 3209 if (key) { 3210 set_bit(HCI_CONN_ENCRYPT, &conn->flags); 3211 hci_read_enc_key_size(hdev, conn); 3212 hci_encrypt_cfm(conn, ev->status); 3213 } 3214 } 3215 3216 /* Get remote features */ 3217 if (conn->type == ACL_LINK) { 3218 struct hci_cp_read_remote_features cp; 3219 cp.handle = ev->handle; 3220 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES, 3221 sizeof(cp), &cp); 3222 3223 hci_update_scan(hdev); 3224 } 3225 3226 /* Set packet type for incoming connection */ 3227 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) { 3228 struct hci_cp_change_conn_ptype cp; 3229 cp.handle = ev->handle; 3230 cp.pkt_type = cpu_to_le16(conn->pkt_type); 3231 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp), 3232 &cp); 3233 } 3234 } 3235 3236 if (conn->type == ACL_LINK) 3237 hci_sco_setup(conn, ev->status); 3238 3239 done: 3240 if (status) { 3241 hci_conn_failed(conn, status); 3242 } else if (ev->link_type == SCO_LINK) { 3243 switch (conn->setting & SCO_AIRMODE_MASK) { 3244 case SCO_AIRMODE_CVSD: 3245 if (hdev->notify) 3246 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD); 3247 break; 3248 } 3249 3250 hci_connect_cfm(conn, status); 3251 } 3252 3253 unlock: 3254 hci_dev_unlock(hdev); 3255 } 3256 3257 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr) 3258 { 3259 struct hci_cp_reject_conn_req cp; 3260 3261 bacpy(&cp.bdaddr, bdaddr); 3262 cp.reason = HCI_ERROR_REJ_BAD_ADDR; 3263 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp); 3264 } 3265 3266 static void hci_conn_request_evt(struct hci_dev *hdev, void *data, 3267 struct sk_buff *skb) 3268 { 3269 struct hci_ev_conn_request *ev = data; 3270 int mask = hdev->link_mode; 3271 struct inquiry_entry *ie; 3272 struct hci_conn *conn; 3273 __u8 flags = 0; 3274 3275 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type); 3276 3277 /* Reject incoming connection from device with same BD ADDR against 3278 * CVE-2020-26555 3279 */ 3280 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) { 3281 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n", 3282 &ev->bdaddr); 3283 hci_reject_conn(hdev, &ev->bdaddr); 3284 return; 3285 } 3286 3287 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type, 3288 &flags); 3289 3290 if (!(mask & HCI_LM_ACCEPT)) { 3291 hci_reject_conn(hdev, &ev->bdaddr); 3292 return; 3293 } 3294 3295 hci_dev_lock(hdev); 3296 3297 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr, 3298 BDADDR_BREDR)) { 3299 hci_reject_conn(hdev, &ev->bdaddr); 3300 goto unlock; 3301 } 3302 3303 /* Require HCI_CONNECTABLE or an accept list entry to accept the 3304 * connection. These features are only touched through mgmt so 3305 * only do the checks if HCI_MGMT is set. 3306 */ 3307 if (hci_dev_test_flag(hdev, HCI_MGMT) && 3308 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) && 3309 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr, 3310 BDADDR_BREDR)) { 3311 hci_reject_conn(hdev, &ev->bdaddr); 3312 goto unlock; 3313 } 3314 3315 /* Connection accepted */ 3316 3317 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); 3318 if (ie) 3319 memcpy(ie->data.dev_class, ev->dev_class, 3); 3320 3321 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, 3322 &ev->bdaddr); 3323 if (!conn) { 3324 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr, 0, 3325 HCI_ROLE_SLAVE); 3326 if (IS_ERR(conn)) { 3327 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 3328 goto unlock; 3329 } 3330 } 3331 3332 memcpy(conn->dev_class, ev->dev_class, 3); 3333 3334 hci_dev_unlock(hdev); 3335 3336 if (ev->link_type == ACL_LINK || 3337 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) { 3338 struct hci_cp_accept_conn_req cp; 3339 conn->state = BT_CONNECT; 3340 3341 bacpy(&cp.bdaddr, &ev->bdaddr); 3342 3343 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER)) 3344 cp.role = 0x00; /* Become central */ 3345 else 3346 cp.role = 0x01; /* Remain peripheral */ 3347 3348 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); 3349 } else if (!(flags & HCI_PROTO_DEFER)) { 3350 struct hci_cp_accept_sync_conn_req cp; 3351 conn->state = BT_CONNECT; 3352 3353 bacpy(&cp.bdaddr, &ev->bdaddr); 3354 cp.pkt_type = cpu_to_le16(conn->pkt_type); 3355 3356 cp.tx_bandwidth = cpu_to_le32(0x00001f40); 3357 cp.rx_bandwidth = cpu_to_le32(0x00001f40); 3358 cp.max_latency = cpu_to_le16(0xffff); 3359 cp.content_format = cpu_to_le16(hdev->voice_setting); 3360 cp.retrans_effort = 0xff; 3361 3362 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp), 3363 &cp); 3364 } else { 3365 conn->state = BT_CONNECT2; 3366 hci_connect_cfm(conn, 0); 3367 } 3368 3369 return; 3370 unlock: 3371 hci_dev_unlock(hdev); 3372 } 3373 3374 static u8 hci_to_mgmt_reason(u8 err) 3375 { 3376 switch (err) { 3377 case HCI_ERROR_CONNECTION_TIMEOUT: 3378 return MGMT_DEV_DISCONN_TIMEOUT; 3379 case HCI_ERROR_REMOTE_USER_TERM: 3380 case HCI_ERROR_REMOTE_LOW_RESOURCES: 3381 case HCI_ERROR_REMOTE_POWER_OFF: 3382 return MGMT_DEV_DISCONN_REMOTE; 3383 case HCI_ERROR_LOCAL_HOST_TERM: 3384 return MGMT_DEV_DISCONN_LOCAL_HOST; 3385 default: 3386 return MGMT_DEV_DISCONN_UNKNOWN; 3387 } 3388 } 3389 3390 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data, 3391 struct sk_buff *skb) 3392 { 3393 struct hci_ev_disconn_complete *ev = data; 3394 u8 reason; 3395 struct hci_conn_params *params; 3396 struct hci_conn *conn; 3397 bool mgmt_connected; 3398 3399 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3400 3401 hci_dev_lock(hdev); 3402 3403 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3404 if (!conn) 3405 goto unlock; 3406 3407 if (ev->status) { 3408 mgmt_disconnect_failed(hdev, &conn->dst, conn->type, 3409 conn->dst_type, ev->status); 3410 goto unlock; 3411 } 3412 3413 conn->state = BT_CLOSED; 3414 3415 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags); 3416 3417 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags)) 3418 reason = MGMT_DEV_DISCONN_AUTH_FAILURE; 3419 else 3420 reason = hci_to_mgmt_reason(ev->reason); 3421 3422 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type, 3423 reason, mgmt_connected); 3424 3425 if (conn->type == ACL_LINK) { 3426 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) 3427 hci_remove_link_key(hdev, &conn->dst); 3428 3429 hci_update_scan(hdev); 3430 } 3431 3432 /* Re-enable passive scanning if disconnected device is marked 3433 * as auto-connectable. 3434 */ 3435 if (conn->type == LE_LINK) { 3436 params = hci_conn_params_lookup(hdev, &conn->dst, 3437 conn->dst_type); 3438 if (params) { 3439 switch (params->auto_connect) { 3440 case HCI_AUTO_CONN_LINK_LOSS: 3441 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT) 3442 break; 3443 fallthrough; 3444 3445 case HCI_AUTO_CONN_DIRECT: 3446 case HCI_AUTO_CONN_ALWAYS: 3447 hci_pend_le_list_del_init(params); 3448 hci_pend_le_list_add(params, 3449 &hdev->pend_le_conns); 3450 hci_update_passive_scan(hdev); 3451 break; 3452 3453 default: 3454 break; 3455 } 3456 } 3457 } 3458 3459 hci_disconn_cfm(conn, ev->reason); 3460 3461 /* Re-enable advertising if necessary, since it might 3462 * have been disabled by the connection. From the 3463 * HCI_LE_Set_Advertise_Enable command description in 3464 * the core specification (v4.0): 3465 * "The Controller shall continue advertising until the Host 3466 * issues an LE_Set_Advertise_Enable command with 3467 * Advertising_Enable set to 0x00 (Advertising is disabled) 3468 * or until a connection is created or until the Advertising 3469 * is timed out due to Directed Advertising." 3470 */ 3471 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) { 3472 hdev->cur_adv_instance = conn->adv_instance; 3473 hci_enable_advertising(hdev); 3474 } 3475 3476 hci_conn_del(conn); 3477 3478 unlock: 3479 hci_dev_unlock(hdev); 3480 } 3481 3482 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data, 3483 struct sk_buff *skb) 3484 { 3485 struct hci_ev_auth_complete *ev = data; 3486 struct hci_conn *conn; 3487 3488 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3489 3490 hci_dev_lock(hdev); 3491 3492 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3493 if (!conn) 3494 goto unlock; 3495 3496 if (!ev->status) { 3497 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); 3498 set_bit(HCI_CONN_AUTH, &conn->flags); 3499 conn->sec_level = conn->pending_sec_level; 3500 } else { 3501 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING) 3502 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); 3503 3504 mgmt_auth_failed(conn, ev->status); 3505 } 3506 3507 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags); 3508 3509 if (conn->state == BT_CONFIG) { 3510 if (!ev->status && hci_conn_ssp_enabled(conn)) { 3511 struct hci_cp_set_conn_encrypt cp; 3512 cp.handle = ev->handle; 3513 cp.encrypt = 0x01; 3514 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), 3515 &cp); 3516 } else { 3517 conn->state = BT_CONNECTED; 3518 hci_connect_cfm(conn, ev->status); 3519 hci_conn_drop(conn); 3520 } 3521 } else { 3522 hci_auth_cfm(conn, ev->status); 3523 3524 hci_conn_hold(conn); 3525 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 3526 hci_conn_drop(conn); 3527 } 3528 3529 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { 3530 if (!ev->status) { 3531 struct hci_cp_set_conn_encrypt cp; 3532 cp.handle = ev->handle; 3533 cp.encrypt = 0x01; 3534 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), 3535 &cp); 3536 } else { 3537 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 3538 hci_encrypt_cfm(conn, ev->status); 3539 } 3540 } 3541 3542 unlock: 3543 hci_dev_unlock(hdev); 3544 } 3545 3546 static void hci_remote_name_evt(struct hci_dev *hdev, void *data, 3547 struct sk_buff *skb) 3548 { 3549 struct hci_ev_remote_name *ev = data; 3550 struct hci_conn *conn; 3551 3552 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3553 3554 hci_dev_lock(hdev); 3555 3556 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 3557 3558 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 3559 goto check_auth; 3560 3561 if (ev->status == 0) 3562 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name, 3563 strnlen(ev->name, HCI_MAX_NAME_LENGTH)); 3564 else 3565 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0); 3566 3567 check_auth: 3568 if (!conn) 3569 goto unlock; 3570 3571 if (!hci_outgoing_auth_needed(hdev, conn)) 3572 goto unlock; 3573 3574 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { 3575 struct hci_cp_auth_requested cp; 3576 3577 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); 3578 3579 cp.handle = __cpu_to_le16(conn->handle); 3580 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp); 3581 } 3582 3583 unlock: 3584 hci_dev_unlock(hdev); 3585 } 3586 3587 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data, 3588 struct sk_buff *skb) 3589 { 3590 struct hci_ev_encrypt_change *ev = data; 3591 struct hci_conn *conn; 3592 3593 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3594 3595 hci_dev_lock(hdev); 3596 3597 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3598 if (!conn) 3599 goto unlock; 3600 3601 if (!ev->status) { 3602 if (ev->encrypt) { 3603 /* Encryption implies authentication */ 3604 set_bit(HCI_CONN_AUTH, &conn->flags); 3605 set_bit(HCI_CONN_ENCRYPT, &conn->flags); 3606 conn->sec_level = conn->pending_sec_level; 3607 3608 /* P-256 authentication key implies FIPS */ 3609 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256) 3610 set_bit(HCI_CONN_FIPS, &conn->flags); 3611 3612 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) || 3613 conn->type == LE_LINK) 3614 set_bit(HCI_CONN_AES_CCM, &conn->flags); 3615 } else { 3616 clear_bit(HCI_CONN_ENCRYPT, &conn->flags); 3617 clear_bit(HCI_CONN_AES_CCM, &conn->flags); 3618 } 3619 } 3620 3621 /* We should disregard the current RPA and generate a new one 3622 * whenever the encryption procedure fails. 3623 */ 3624 if (ev->status && conn->type == LE_LINK) { 3625 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED); 3626 hci_adv_instances_set_rpa_expired(hdev, true); 3627 } 3628 3629 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 3630 3631 /* Check link security requirements are met */ 3632 if (!hci_conn_check_link_mode(conn)) 3633 ev->status = HCI_ERROR_AUTH_FAILURE; 3634 3635 if (ev->status && conn->state == BT_CONNECTED) { 3636 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING) 3637 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags); 3638 3639 /* Notify upper layers so they can cleanup before 3640 * disconnecting. 3641 */ 3642 hci_encrypt_cfm(conn, ev->status); 3643 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 3644 hci_conn_drop(conn); 3645 goto unlock; 3646 } 3647 3648 /* Try reading the encryption key size for encrypted ACL links */ 3649 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) { 3650 if (hci_read_enc_key_size(hdev, conn)) 3651 goto notify; 3652 3653 goto unlock; 3654 } 3655 3656 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers 3657 * to avoid unexpected SMP command errors when pairing. 3658 */ 3659 if (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT)) 3660 goto notify; 3661 3662 /* Set the default Authenticated Payload Timeout after 3663 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B 3664 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be 3665 * sent when the link is active and Encryption is enabled, the conn 3666 * type can be either LE or ACL and controller must support LMP Ping. 3667 * Ensure for AES-CCM encryption as well. 3668 */ 3669 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) && 3670 test_bit(HCI_CONN_AES_CCM, &conn->flags) && 3671 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) || 3672 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) { 3673 struct hci_cp_write_auth_payload_to cp; 3674 3675 cp.handle = cpu_to_le16(conn->handle); 3676 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout); 3677 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO, 3678 sizeof(cp), &cp)) 3679 bt_dev_err(hdev, "write auth payload timeout failed"); 3680 } 3681 3682 notify: 3683 hci_encrypt_cfm(conn, ev->status); 3684 3685 unlock: 3686 hci_dev_unlock(hdev); 3687 } 3688 3689 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data, 3690 struct sk_buff *skb) 3691 { 3692 struct hci_ev_change_link_key_complete *ev = data; 3693 struct hci_conn *conn; 3694 3695 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3696 3697 hci_dev_lock(hdev); 3698 3699 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3700 if (conn) { 3701 if (!ev->status) 3702 set_bit(HCI_CONN_SECURE, &conn->flags); 3703 3704 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags); 3705 3706 hci_key_change_cfm(conn, ev->status); 3707 } 3708 3709 hci_dev_unlock(hdev); 3710 } 3711 3712 static void hci_remote_features_evt(struct hci_dev *hdev, void *data, 3713 struct sk_buff *skb) 3714 { 3715 struct hci_ev_remote_features *ev = data; 3716 struct hci_conn *conn; 3717 3718 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 3719 3720 hci_dev_lock(hdev); 3721 3722 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 3723 if (!conn) 3724 goto unlock; 3725 3726 if (!ev->status) 3727 memcpy(conn->features[0], ev->features, 8); 3728 3729 if (conn->state != BT_CONFIG) 3730 goto unlock; 3731 3732 if (!ev->status && lmp_ext_feat_capable(hdev) && 3733 lmp_ext_feat_capable(conn)) { 3734 struct hci_cp_read_remote_ext_features cp; 3735 cp.handle = ev->handle; 3736 cp.page = 0x01; 3737 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES, 3738 sizeof(cp), &cp); 3739 goto unlock; 3740 } 3741 3742 if (!ev->status) { 3743 struct hci_cp_remote_name_req cp; 3744 memset(&cp, 0, sizeof(cp)); 3745 bacpy(&cp.bdaddr, &conn->dst); 3746 cp.pscan_rep_mode = 0x02; 3747 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); 3748 } else { 3749 mgmt_device_connected(hdev, conn, NULL, 0); 3750 } 3751 3752 if (!hci_outgoing_auth_needed(hdev, conn)) { 3753 conn->state = BT_CONNECTED; 3754 hci_connect_cfm(conn, ev->status); 3755 hci_conn_drop(conn); 3756 } 3757 3758 unlock: 3759 hci_dev_unlock(hdev); 3760 } 3761 3762 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd) 3763 { 3764 cancel_delayed_work(&hdev->cmd_timer); 3765 3766 rcu_read_lock(); 3767 if (!test_bit(HCI_RESET, &hdev->flags)) { 3768 if (ncmd) { 3769 cancel_delayed_work(&hdev->ncmd_timer); 3770 atomic_set(&hdev->cmd_cnt, 1); 3771 } else { 3772 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) 3773 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer, 3774 HCI_NCMD_TIMEOUT); 3775 } 3776 } 3777 rcu_read_unlock(); 3778 } 3779 3780 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data, 3781 struct sk_buff *skb) 3782 { 3783 struct hci_rp_le_read_buffer_size_v2 *rp = data; 3784 3785 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3786 3787 if (rp->status) 3788 return rp->status; 3789 3790 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu); 3791 hdev->le_pkts = rp->acl_max_pkt; 3792 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu); 3793 hdev->iso_pkts = rp->iso_max_pkt; 3794 3795 hdev->le_cnt = hdev->le_pkts; 3796 hdev->iso_cnt = hdev->iso_pkts; 3797 3798 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu, 3799 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts); 3800 3801 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU) 3802 return HCI_ERROR_INVALID_PARAMETERS; 3803 3804 return rp->status; 3805 } 3806 3807 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status) 3808 { 3809 struct hci_conn *conn, *tmp; 3810 3811 lockdep_assert_held(&hdev->lock); 3812 3813 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) { 3814 if (conn->type != CIS_LINK || 3815 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig) 3816 continue; 3817 3818 if (HCI_CONN_HANDLE_UNSET(conn->handle)) 3819 hci_conn_failed(conn, status); 3820 } 3821 } 3822 3823 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data, 3824 struct sk_buff *skb) 3825 { 3826 struct hci_rp_le_set_cig_params *rp = data; 3827 struct hci_cp_le_set_cig_params *cp; 3828 struct hci_conn *conn; 3829 u8 status = rp->status; 3830 bool pending = false; 3831 int i; 3832 3833 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3834 3835 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS); 3836 if (!rp->status && (!cp || rp->num_handles != cp->num_cis || 3837 rp->cig_id != cp->cig_id)) { 3838 bt_dev_err(hdev, "unexpected Set CIG Parameters response data"); 3839 status = HCI_ERROR_UNSPECIFIED; 3840 } 3841 3842 hci_dev_lock(hdev); 3843 3844 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554 3845 * 3846 * If the Status return parameter is non-zero, then the state of the CIG 3847 * and its CIS configurations shall not be changed by the command. If 3848 * the CIG did not already exist, it shall not be created. 3849 */ 3850 if (status) { 3851 /* Keep current configuration, fail only the unbound CIS */ 3852 hci_unbound_cis_failed(hdev, rp->cig_id, status); 3853 goto unlock; 3854 } 3855 3856 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553 3857 * 3858 * If the Status return parameter is zero, then the Controller shall 3859 * set the Connection_Handle arrayed return parameter to the connection 3860 * handle(s) corresponding to the CIS configurations specified in 3861 * the CIS_IDs command parameter, in the same order. 3862 */ 3863 for (i = 0; i < rp->num_handles; ++i) { 3864 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id, 3865 cp->cis[i].cis_id); 3866 if (!conn || !bacmp(&conn->dst, BDADDR_ANY)) 3867 continue; 3868 3869 if (conn->state != BT_BOUND && conn->state != BT_CONNECT) 3870 continue; 3871 3872 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i]))) 3873 continue; 3874 3875 if (conn->state == BT_CONNECT) 3876 pending = true; 3877 } 3878 3879 unlock: 3880 if (pending) 3881 hci_le_create_cis_pending(hdev); 3882 3883 hci_dev_unlock(hdev); 3884 3885 return rp->status; 3886 } 3887 3888 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data, 3889 struct sk_buff *skb) 3890 { 3891 struct hci_rp_le_setup_iso_path *rp = data; 3892 struct hci_cp_le_setup_iso_path *cp; 3893 struct hci_conn *conn; 3894 3895 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3896 3897 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH); 3898 if (!cp) 3899 return rp->status; 3900 3901 hci_dev_lock(hdev); 3902 3903 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 3904 if (!conn) 3905 goto unlock; 3906 3907 if (rp->status) { 3908 hci_connect_cfm(conn, rp->status); 3909 hci_conn_del(conn); 3910 goto unlock; 3911 } 3912 3913 switch (cp->direction) { 3914 /* Input (Host to Controller) */ 3915 case 0x00: 3916 /* Only confirm connection if output only */ 3917 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu) 3918 hci_connect_cfm(conn, rp->status); 3919 break; 3920 /* Output (Controller to Host) */ 3921 case 0x01: 3922 /* Confirm connection since conn->iso_qos is always configured 3923 * last. 3924 */ 3925 hci_connect_cfm(conn, rp->status); 3926 3927 /* Notify device connected in case it is a BIG Sync */ 3928 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags)) 3929 mgmt_device_connected(hdev, conn, NULL, 0); 3930 3931 break; 3932 } 3933 3934 unlock: 3935 hci_dev_unlock(hdev); 3936 return rp->status; 3937 } 3938 3939 static u8 hci_cc_le_read_all_local_features(struct hci_dev *hdev, void *data, 3940 struct sk_buff *skb) 3941 { 3942 struct hci_rp_le_read_all_local_features *rp = data; 3943 3944 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3945 3946 if (rp->status) 3947 return rp->status; 3948 3949 memcpy(hdev->le_features, rp->features, 248); 3950 3951 return rp->status; 3952 } 3953 3954 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status) 3955 { 3956 bt_dev_dbg(hdev, "status 0x%2.2x", status); 3957 } 3958 3959 static void hci_cs_le_read_all_remote_features(struct hci_dev *hdev, u8 status) 3960 { 3961 struct hci_cp_le_read_remote_features *cp; 3962 struct hci_conn *conn; 3963 3964 bt_dev_dbg(hdev, "status 0x%2.2x", status); 3965 3966 if (!status) 3967 return; 3968 3969 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_ALL_REMOTE_FEATURES); 3970 if (!cp) 3971 return; 3972 3973 hci_dev_lock(hdev); 3974 3975 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle)); 3976 if (conn && conn->state == BT_CONFIG) 3977 hci_connect_cfm(conn, status); 3978 3979 hci_dev_unlock(hdev); 3980 } 3981 3982 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data, 3983 struct sk_buff *skb) 3984 { 3985 struct hci_ev_status *rp = data; 3986 struct hci_cp_le_set_per_adv_params *cp; 3987 3988 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 3989 3990 if (rp->status) 3991 return rp->status; 3992 3993 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS); 3994 if (!cp) 3995 return rp->status; 3996 3997 /* TODO: set the conn state */ 3998 return rp->status; 3999 } 4000 4001 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data, 4002 struct sk_buff *skb) 4003 { 4004 struct hci_ev_status *rp = data; 4005 struct hci_cp_le_set_per_adv_enable *cp; 4006 struct adv_info *adv = NULL, *n; 4007 u8 per_adv_cnt = 0; 4008 4009 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status); 4010 4011 if (rp->status) 4012 return rp->status; 4013 4014 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE); 4015 if (!cp) 4016 return rp->status; 4017 4018 hci_dev_lock(hdev); 4019 4020 adv = hci_find_adv_instance(hdev, cp->handle); 4021 4022 if (cp->enable) { 4023 hci_dev_set_flag(hdev, HCI_LE_PER_ADV); 4024 4025 if (adv) 4026 adv->periodic_enabled = true; 4027 } else { 4028 if (adv) 4029 adv->periodic_enabled = false; 4030 4031 /* If just one instance was disabled check if there are 4032 * any other instance enabled before clearing HCI_LE_PER_ADV. 4033 * The current periodic adv instance will be marked as 4034 * disabled once extended advertising is also disabled. 4035 */ 4036 list_for_each_entry_safe(adv, n, &hdev->adv_instances, 4037 list) { 4038 if (adv->periodic && adv->enabled) 4039 per_adv_cnt++; 4040 } 4041 4042 if (per_adv_cnt > 1) 4043 goto unlock; 4044 4045 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV); 4046 } 4047 4048 unlock: 4049 hci_dev_unlock(hdev); 4050 4051 return rp->status; 4052 } 4053 4054 #define HCI_CC_VL(_op, _func, _min, _max) \ 4055 { \ 4056 .op = _op, \ 4057 .func = _func, \ 4058 .min_len = _min, \ 4059 .max_len = _max, \ 4060 } 4061 4062 #define HCI_CC(_op, _func, _len) \ 4063 HCI_CC_VL(_op, _func, _len, _len) 4064 4065 #define HCI_CC_STATUS(_op, _func) \ 4066 HCI_CC(_op, _func, sizeof(struct hci_ev_status)) 4067 4068 static const struct hci_cc { 4069 u16 op; 4070 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb); 4071 u16 min_len; 4072 u16 max_len; 4073 } hci_cc_table[] = { 4074 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel), 4075 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq), 4076 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq), 4077 HCI_CC(HCI_OP_REMOTE_NAME_REQ_CANCEL, hci_cc_remote_name_req_cancel, 4078 sizeof(struct hci_rp_remote_name_req_cancel)), 4079 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery, 4080 sizeof(struct hci_rp_role_discovery)), 4081 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy, 4082 sizeof(struct hci_rp_read_link_policy)), 4083 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy, 4084 sizeof(struct hci_rp_write_link_policy)), 4085 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy, 4086 sizeof(struct hci_rp_read_def_link_policy)), 4087 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY, 4088 hci_cc_write_def_link_policy), 4089 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset), 4090 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key, 4091 sizeof(struct hci_rp_read_stored_link_key)), 4092 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key, 4093 sizeof(struct hci_rp_delete_stored_link_key)), 4094 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name), 4095 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name, 4096 sizeof(struct hci_rp_read_local_name)), 4097 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable), 4098 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode), 4099 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable), 4100 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter), 4101 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev, 4102 sizeof(struct hci_rp_read_class_of_dev)), 4103 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev), 4104 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting, 4105 sizeof(struct hci_rp_read_voice_setting)), 4106 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting), 4107 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac, 4108 sizeof(struct hci_rp_read_num_supported_iac)), 4109 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode), 4110 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support), 4111 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout, 4112 sizeof(struct hci_rp_read_auth_payload_to)), 4113 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout, 4114 sizeof(struct hci_rp_write_auth_payload_to)), 4115 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version, 4116 sizeof(struct hci_rp_read_local_version)), 4117 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands, 4118 sizeof(struct hci_rp_read_local_commands)), 4119 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features, 4120 sizeof(struct hci_rp_read_local_features)), 4121 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features, 4122 sizeof(struct hci_rp_read_local_ext_features)), 4123 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size, 4124 sizeof(struct hci_rp_read_buffer_size)), 4125 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr, 4126 sizeof(struct hci_rp_read_bd_addr)), 4127 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts, 4128 sizeof(struct hci_rp_read_local_pairing_opts)), 4129 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity, 4130 sizeof(struct hci_rp_read_page_scan_activity)), 4131 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY, 4132 hci_cc_write_page_scan_activity), 4133 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type, 4134 sizeof(struct hci_rp_read_page_scan_type)), 4135 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type), 4136 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock, 4137 sizeof(struct hci_rp_read_clock)), 4138 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size, 4139 sizeof(struct hci_rp_read_enc_key_size)), 4140 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power, 4141 sizeof(struct hci_rp_read_inq_rsp_tx_power)), 4142 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING, 4143 hci_cc_read_def_err_data_reporting, 4144 sizeof(struct hci_rp_read_def_err_data_reporting)), 4145 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING, 4146 hci_cc_write_def_err_data_reporting), 4147 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply, 4148 sizeof(struct hci_rp_pin_code_reply)), 4149 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply, 4150 sizeof(struct hci_rp_pin_code_neg_reply)), 4151 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data, 4152 sizeof(struct hci_rp_read_local_oob_data)), 4153 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data, 4154 sizeof(struct hci_rp_read_local_oob_ext_data)), 4155 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size, 4156 sizeof(struct hci_rp_le_read_buffer_size)), 4157 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features, 4158 sizeof(struct hci_rp_le_read_local_features)), 4159 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power, 4160 sizeof(struct hci_rp_le_read_adv_tx_power)), 4161 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply, 4162 sizeof(struct hci_rp_user_confirm_reply)), 4163 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply, 4164 sizeof(struct hci_rp_user_confirm_reply)), 4165 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply, 4166 sizeof(struct hci_rp_user_confirm_reply)), 4167 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply, 4168 sizeof(struct hci_rp_user_confirm_reply)), 4169 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr), 4170 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable), 4171 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param), 4172 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable), 4173 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE, 4174 hci_cc_le_read_accept_list_size, 4175 sizeof(struct hci_rp_le_read_accept_list_size)), 4176 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list), 4177 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST, 4178 hci_cc_le_add_to_accept_list), 4179 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST, 4180 hci_cc_le_del_from_accept_list), 4181 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states, 4182 sizeof(struct hci_rp_le_read_supported_states)), 4183 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len, 4184 sizeof(struct hci_rp_le_read_def_data_len)), 4185 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN, 4186 hci_cc_le_write_def_data_len), 4187 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST, 4188 hci_cc_le_add_to_resolv_list), 4189 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST, 4190 hci_cc_le_del_from_resolv_list), 4191 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST, 4192 hci_cc_le_clear_resolv_list), 4193 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size, 4194 sizeof(struct hci_rp_le_read_resolv_list_size)), 4195 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 4196 hci_cc_le_set_addr_resolution_enable), 4197 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len, 4198 sizeof(struct hci_rp_le_read_max_data_len)), 4199 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED, 4200 hci_cc_write_le_host_supported), 4201 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param), 4202 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi, 4203 sizeof(struct hci_rp_read_rssi)), 4204 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power, 4205 sizeof(struct hci_rp_read_tx_power)), 4206 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode), 4207 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS, 4208 hci_cc_le_set_ext_scan_param), 4209 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE, 4210 hci_cc_le_set_ext_scan_enable), 4211 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy), 4212 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS, 4213 hci_cc_le_read_num_adv_sets, 4214 sizeof(struct hci_rp_le_read_num_supported_adv_sets)), 4215 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE, 4216 hci_cc_le_set_ext_adv_enable), 4217 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR, 4218 hci_cc_le_set_adv_set_random_addr), 4219 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set), 4220 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets), 4221 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param), 4222 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE, 4223 hci_cc_le_set_per_adv_enable), 4224 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power, 4225 sizeof(struct hci_rp_le_read_transmit_power)), 4226 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode), 4227 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2, 4228 sizeof(struct hci_rp_le_read_buffer_size_v2)), 4229 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params, 4230 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE), 4231 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path, 4232 sizeof(struct hci_rp_le_setup_iso_path)), 4233 HCI_CC(HCI_OP_LE_READ_ALL_LOCAL_FEATURES, 4234 hci_cc_le_read_all_local_features, 4235 sizeof(struct hci_rp_le_read_all_local_features)), 4236 }; 4237 4238 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc, 4239 struct sk_buff *skb) 4240 { 4241 void *data; 4242 4243 if (skb->len < cc->min_len) { 4244 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u", 4245 cc->op, skb->len, cc->min_len); 4246 return HCI_ERROR_UNSPECIFIED; 4247 } 4248 4249 /* Just warn if the length is over max_len size it still be possible to 4250 * partially parse the cc so leave to callback to decide if that is 4251 * acceptable. 4252 */ 4253 if (skb->len > cc->max_len) 4254 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u", 4255 cc->op, skb->len, cc->max_len); 4256 4257 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len); 4258 if (!data) 4259 return HCI_ERROR_UNSPECIFIED; 4260 4261 return cc->func(hdev, data, skb); 4262 } 4263 4264 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data, 4265 struct sk_buff *skb, u16 *opcode, u8 *status, 4266 hci_req_complete_t *req_complete, 4267 hci_req_complete_skb_t *req_complete_skb) 4268 { 4269 struct hci_ev_cmd_complete *ev = data; 4270 int i; 4271 4272 *opcode = __le16_to_cpu(ev->opcode); 4273 4274 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode); 4275 4276 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) { 4277 if (hci_cc_table[i].op == *opcode) { 4278 *status = hci_cc_func(hdev, &hci_cc_table[i], skb); 4279 break; 4280 } 4281 } 4282 4283 if (i == ARRAY_SIZE(hci_cc_table)) { 4284 if (!skb->len) { 4285 bt_dev_err(hdev, "Unexpected cc 0x%4.4x with no status", 4286 *opcode); 4287 *status = HCI_ERROR_UNSPECIFIED; 4288 return; 4289 } 4290 4291 /* Unknown opcode, assume byte 0 contains the status, so 4292 * that e.g. __hci_cmd_sync() properly returns errors 4293 * for vendor specific commands send by HCI drivers. 4294 * If a vendor doesn't actually follow this convention we may 4295 * need to introduce a vendor CC table in order to properly set 4296 * the status. 4297 */ 4298 *status = skb->data[0]; 4299 } 4300 4301 handle_cmd_cnt_and_timer(hdev, ev->ncmd); 4302 4303 hci_req_cmd_complete(hdev, *opcode, *status, req_complete, 4304 req_complete_skb); 4305 4306 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) { 4307 bt_dev_err(hdev, 4308 "unexpected event for opcode 0x%4.4x", *opcode); 4309 return; 4310 } 4311 4312 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q)) 4313 queue_work(hdev->workqueue, &hdev->cmd_work); 4314 } 4315 4316 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status) 4317 { 4318 struct hci_cp_le_create_cis *cp; 4319 bool pending = false; 4320 int i; 4321 4322 bt_dev_dbg(hdev, "status 0x%2.2x", status); 4323 4324 if (!status) 4325 return; 4326 4327 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS); 4328 if (!cp) 4329 return; 4330 4331 hci_dev_lock(hdev); 4332 4333 /* Remove connection if command failed */ 4334 for (i = 0; i < cp->num_cis; i++) { 4335 struct hci_conn *conn; 4336 u16 handle; 4337 4338 handle = __le16_to_cpu(cp->cis[i].cis_handle); 4339 4340 conn = hci_conn_hash_lookup_handle(hdev, handle); 4341 if (conn) { 4342 if (test_and_clear_bit(HCI_CONN_CREATE_CIS, 4343 &conn->flags)) 4344 pending = true; 4345 conn->state = BT_CLOSED; 4346 hci_connect_cfm(conn, status); 4347 hci_conn_del(conn); 4348 } 4349 } 4350 cp->num_cis = 0; 4351 4352 if (pending) 4353 hci_le_create_cis_pending(hdev); 4354 4355 hci_dev_unlock(hdev); 4356 } 4357 4358 #define HCI_CS(_op, _func) \ 4359 { \ 4360 .op = _op, \ 4361 .func = _func, \ 4362 } 4363 4364 static const struct hci_cs { 4365 u16 op; 4366 void (*func)(struct hci_dev *hdev, __u8 status); 4367 } hci_cs_table[] = { 4368 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry), 4369 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn), 4370 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect), 4371 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco), 4372 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested), 4373 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt), 4374 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req), 4375 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features), 4376 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES, 4377 hci_cs_read_remote_ext_features), 4378 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn), 4379 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN, 4380 hci_cs_enhanced_setup_sync_conn), 4381 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode), 4382 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode), 4383 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role), 4384 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn), 4385 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features), 4386 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc), 4387 HCI_CS(HCI_OP_LE_SET_PHY, hci_cs_le_set_phy), 4388 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn), 4389 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis), 4390 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big), 4391 HCI_CS(HCI_OP_LE_READ_ALL_REMOTE_FEATURES, 4392 hci_cs_le_read_all_remote_features), 4393 }; 4394 4395 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data, 4396 struct sk_buff *skb, u16 *opcode, u8 *status, 4397 hci_req_complete_t *req_complete, 4398 hci_req_complete_skb_t *req_complete_skb) 4399 { 4400 struct hci_ev_cmd_status *ev = data; 4401 int i; 4402 4403 *opcode = __le16_to_cpu(ev->opcode); 4404 *status = ev->status; 4405 4406 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode); 4407 4408 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) { 4409 if (hci_cs_table[i].op == *opcode) { 4410 hci_cs_table[i].func(hdev, ev->status); 4411 break; 4412 } 4413 } 4414 4415 handle_cmd_cnt_and_timer(hdev, ev->ncmd); 4416 4417 /* Indicate request completion if the command failed. Also, if 4418 * we're not waiting for a special event and we get a success 4419 * command status we should try to flag the request as completed 4420 * (since for this kind of commands there will not be a command 4421 * complete event). 4422 */ 4423 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) { 4424 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete, 4425 req_complete_skb); 4426 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) { 4427 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x", 4428 *opcode); 4429 return; 4430 } 4431 } 4432 4433 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q)) 4434 queue_work(hdev->workqueue, &hdev->cmd_work); 4435 } 4436 4437 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data, 4438 struct sk_buff *skb) 4439 { 4440 struct hci_ev_hardware_error *ev = data; 4441 4442 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code); 4443 4444 hdev->hw_error_code = ev->code; 4445 4446 queue_work(hdev->req_workqueue, &hdev->error_reset); 4447 } 4448 4449 static void hci_role_change_evt(struct hci_dev *hdev, void *data, 4450 struct sk_buff *skb) 4451 { 4452 struct hci_ev_role_change *ev = data; 4453 struct hci_conn *conn; 4454 4455 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4456 4457 hci_dev_lock(hdev); 4458 4459 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4460 if (conn) { 4461 if (!ev->status) 4462 conn->role = ev->role; 4463 4464 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags); 4465 4466 hci_role_switch_cfm(conn, ev->status, ev->role); 4467 } 4468 4469 hci_dev_unlock(hdev); 4470 } 4471 4472 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data, 4473 struct sk_buff *skb) 4474 { 4475 struct hci_ev_num_comp_pkts *ev = data; 4476 int i; 4477 4478 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS, 4479 flex_array_size(ev, handles, ev->num))) 4480 return; 4481 4482 bt_dev_dbg(hdev, "num %d", ev->num); 4483 4484 hci_dev_lock(hdev); 4485 4486 for (i = 0; i < ev->num; i++) { 4487 struct hci_comp_pkts_info *info = &ev->handles[i]; 4488 struct hci_conn *conn; 4489 __u16 handle, count; 4490 unsigned int i; 4491 4492 handle = __le16_to_cpu(info->handle); 4493 count = __le16_to_cpu(info->count); 4494 4495 conn = hci_conn_hash_lookup_handle(hdev, handle); 4496 if (!conn) 4497 continue; 4498 4499 /* Check if there is really enough packets outstanding before 4500 * attempting to decrease the sent counter otherwise it could 4501 * underflow.. 4502 */ 4503 if (conn->sent >= count) { 4504 conn->sent -= count; 4505 } else { 4506 bt_dev_warn(hdev, "hcon %p sent %u < count %u", 4507 conn, conn->sent, count); 4508 conn->sent = 0; 4509 } 4510 4511 for (i = 0; i < count; ++i) 4512 hci_conn_tx_dequeue(conn); 4513 4514 switch (conn->type) { 4515 case ACL_LINK: 4516 hdev->acl_cnt += count; 4517 if (hdev->acl_cnt > hdev->acl_pkts) 4518 hdev->acl_cnt = hdev->acl_pkts; 4519 break; 4520 4521 case LE_LINK: 4522 if (hdev->le_pkts) { 4523 hdev->le_cnt += count; 4524 if (hdev->le_cnt > hdev->le_pkts) 4525 hdev->le_cnt = hdev->le_pkts; 4526 } else { 4527 hdev->acl_cnt += count; 4528 if (hdev->acl_cnt > hdev->acl_pkts) 4529 hdev->acl_cnt = hdev->acl_pkts; 4530 } 4531 break; 4532 4533 case SCO_LINK: 4534 case ESCO_LINK: 4535 hdev->sco_cnt += count; 4536 if (hdev->sco_cnt > hdev->sco_pkts) 4537 hdev->sco_cnt = hdev->sco_pkts; 4538 4539 break; 4540 4541 case CIS_LINK: 4542 case BIS_LINK: 4543 case PA_LINK: 4544 hdev->iso_cnt += count; 4545 if (hdev->iso_cnt > hdev->iso_pkts) 4546 hdev->iso_cnt = hdev->iso_pkts; 4547 break; 4548 4549 default: 4550 bt_dev_err(hdev, "unknown type %d conn %p", 4551 conn->type, conn); 4552 break; 4553 } 4554 } 4555 4556 queue_work(hdev->workqueue, &hdev->tx_work); 4557 4558 hci_dev_unlock(hdev); 4559 } 4560 4561 static void hci_mode_change_evt(struct hci_dev *hdev, void *data, 4562 struct sk_buff *skb) 4563 { 4564 struct hci_ev_mode_change *ev = data; 4565 struct hci_conn *conn; 4566 4567 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4568 4569 hci_dev_lock(hdev); 4570 4571 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4572 if (conn) { 4573 conn->mode = ev->mode; 4574 4575 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND, 4576 &conn->flags)) { 4577 if (conn->mode == HCI_CM_ACTIVE) 4578 set_bit(HCI_CONN_POWER_SAVE, &conn->flags); 4579 else 4580 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags); 4581 } 4582 4583 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags)) 4584 hci_sco_setup(conn, ev->status); 4585 } 4586 4587 hci_dev_unlock(hdev); 4588 } 4589 4590 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data, 4591 struct sk_buff *skb) 4592 { 4593 struct hci_ev_pin_code_req *ev = data; 4594 struct hci_conn *conn; 4595 4596 bt_dev_dbg(hdev, ""); 4597 4598 hci_dev_lock(hdev); 4599 4600 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4601 if (!conn) 4602 goto unlock; 4603 4604 if (conn->state == BT_CONNECTED) { 4605 hci_conn_hold(conn); 4606 conn->disc_timeout = HCI_PAIRING_TIMEOUT; 4607 hci_conn_drop(conn); 4608 } 4609 4610 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) && 4611 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) { 4612 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY, 4613 sizeof(ev->bdaddr), &ev->bdaddr); 4614 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) { 4615 u8 secure; 4616 4617 if (conn->pending_sec_level == BT_SECURITY_HIGH) 4618 secure = 1; 4619 else 4620 secure = 0; 4621 4622 mgmt_pin_code_request(hdev, &ev->bdaddr, secure); 4623 } 4624 4625 unlock: 4626 hci_dev_unlock(hdev); 4627 } 4628 4629 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len) 4630 { 4631 if (key_type == HCI_LK_CHANGED_COMBINATION) 4632 return; 4633 4634 conn->pin_length = pin_len; 4635 conn->key_type = key_type; 4636 4637 switch (key_type) { 4638 case HCI_LK_LOCAL_UNIT: 4639 case HCI_LK_REMOTE_UNIT: 4640 case HCI_LK_DEBUG_COMBINATION: 4641 return; 4642 case HCI_LK_COMBINATION: 4643 if (pin_len == 16) 4644 conn->pending_sec_level = BT_SECURITY_HIGH; 4645 else 4646 conn->pending_sec_level = BT_SECURITY_MEDIUM; 4647 break; 4648 case HCI_LK_UNAUTH_COMBINATION_P192: 4649 case HCI_LK_UNAUTH_COMBINATION_P256: 4650 conn->pending_sec_level = BT_SECURITY_MEDIUM; 4651 break; 4652 case HCI_LK_AUTH_COMBINATION_P192: 4653 conn->pending_sec_level = BT_SECURITY_HIGH; 4654 break; 4655 case HCI_LK_AUTH_COMBINATION_P256: 4656 conn->pending_sec_level = BT_SECURITY_FIPS; 4657 break; 4658 } 4659 } 4660 4661 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data, 4662 struct sk_buff *skb) 4663 { 4664 struct hci_ev_link_key_req *ev = data; 4665 struct hci_cp_link_key_reply cp; 4666 struct hci_conn *conn; 4667 struct link_key *key; 4668 4669 bt_dev_dbg(hdev, ""); 4670 4671 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 4672 return; 4673 4674 hci_dev_lock(hdev); 4675 4676 key = hci_find_link_key(hdev, &ev->bdaddr); 4677 if (!key) { 4678 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr); 4679 goto not_found; 4680 } 4681 4682 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr); 4683 4684 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4685 if (conn) { 4686 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags); 4687 4688 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 || 4689 key->type == HCI_LK_UNAUTH_COMBINATION_P256) && 4690 conn->auth_type != 0xff && (conn->auth_type & 0x01)) { 4691 bt_dev_dbg(hdev, "ignoring unauthenticated key"); 4692 goto not_found; 4693 } 4694 4695 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 && 4696 (conn->pending_sec_level == BT_SECURITY_HIGH || 4697 conn->pending_sec_level == BT_SECURITY_FIPS)) { 4698 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security"); 4699 goto not_found; 4700 } 4701 4702 conn_set_key(conn, key->type, key->pin_len); 4703 } 4704 4705 bacpy(&cp.bdaddr, &ev->bdaddr); 4706 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE); 4707 4708 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp); 4709 4710 hci_dev_unlock(hdev); 4711 4712 return; 4713 4714 not_found: 4715 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr); 4716 hci_dev_unlock(hdev); 4717 } 4718 4719 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data, 4720 struct sk_buff *skb) 4721 { 4722 struct hci_ev_link_key_notify *ev = data; 4723 struct hci_conn *conn; 4724 struct link_key *key; 4725 bool persistent; 4726 u8 pin_len = 0; 4727 4728 bt_dev_dbg(hdev, ""); 4729 4730 hci_dev_lock(hdev); 4731 4732 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 4733 if (!conn) 4734 goto unlock; 4735 4736 /* Ignore NULL link key against CVE-2020-26555 */ 4737 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) { 4738 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR", 4739 &ev->bdaddr); 4740 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 4741 hci_conn_drop(conn); 4742 goto unlock; 4743 } 4744 4745 hci_conn_hold(conn); 4746 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 4747 hci_conn_drop(conn); 4748 4749 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags); 4750 conn_set_key(conn, ev->key_type, conn->pin_length); 4751 4752 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 4753 goto unlock; 4754 4755 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key, 4756 ev->key_type, pin_len, &persistent); 4757 if (!key) 4758 goto unlock; 4759 4760 /* Update connection information since adding the key will have 4761 * fixed up the type in the case of changed combination keys. 4762 */ 4763 if (ev->key_type == HCI_LK_CHANGED_COMBINATION) 4764 conn_set_key(conn, key->type, key->pin_len); 4765 4766 mgmt_new_link_key(hdev, key, persistent); 4767 4768 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag 4769 * is set. If it's not set simply remove the key from the kernel 4770 * list (we've still notified user space about it but with 4771 * store_hint being 0). 4772 */ 4773 if (key->type == HCI_LK_DEBUG_COMBINATION && 4774 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) { 4775 list_del_rcu(&key->list); 4776 kfree_rcu(key, rcu); 4777 goto unlock; 4778 } 4779 4780 if (persistent) 4781 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags); 4782 else 4783 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags); 4784 4785 unlock: 4786 hci_dev_unlock(hdev); 4787 } 4788 4789 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data, 4790 struct sk_buff *skb) 4791 { 4792 struct hci_ev_clock_offset *ev = data; 4793 struct hci_conn *conn; 4794 4795 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4796 4797 hci_dev_lock(hdev); 4798 4799 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4800 if (conn && !ev->status) { 4801 struct inquiry_entry *ie; 4802 4803 ie = hci_inquiry_cache_lookup(hdev, &conn->dst); 4804 if (ie) { 4805 ie->data.clock_offset = ev->clock_offset; 4806 ie->timestamp = jiffies; 4807 } 4808 } 4809 4810 hci_dev_unlock(hdev); 4811 } 4812 4813 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data, 4814 struct sk_buff *skb) 4815 { 4816 struct hci_ev_pkt_type_change *ev = data; 4817 struct hci_conn *conn; 4818 4819 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4820 4821 hci_dev_lock(hdev); 4822 4823 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4824 if (conn && !ev->status) 4825 conn->pkt_type = __le16_to_cpu(ev->pkt_type); 4826 4827 hci_dev_unlock(hdev); 4828 } 4829 4830 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data, 4831 struct sk_buff *skb) 4832 { 4833 struct hci_ev_pscan_rep_mode *ev = data; 4834 struct inquiry_entry *ie; 4835 4836 bt_dev_dbg(hdev, ""); 4837 4838 hci_dev_lock(hdev); 4839 4840 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); 4841 if (ie) { 4842 ie->data.pscan_rep_mode = ev->pscan_rep_mode; 4843 ie->timestamp = jiffies; 4844 } 4845 4846 hci_dev_unlock(hdev); 4847 } 4848 4849 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata, 4850 struct sk_buff *skb) 4851 { 4852 struct hci_ev_inquiry_result_rssi *ev = edata; 4853 struct inquiry_data data; 4854 int i; 4855 4856 bt_dev_dbg(hdev, "num_rsp %d", ev->num); 4857 4858 if (!ev->num) 4859 return; 4860 4861 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) 4862 return; 4863 4864 hci_dev_lock(hdev); 4865 4866 if (skb->len == array_size(ev->num, 4867 sizeof(struct inquiry_info_rssi_pscan))) { 4868 struct inquiry_info_rssi_pscan *info; 4869 4870 for (i = 0; i < ev->num; i++) { 4871 u32 flags; 4872 4873 info = hci_ev_skb_pull(hdev, skb, 4874 HCI_EV_INQUIRY_RESULT_WITH_RSSI, 4875 sizeof(*info)); 4876 if (!info) { 4877 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", 4878 HCI_EV_INQUIRY_RESULT_WITH_RSSI); 4879 goto unlock; 4880 } 4881 4882 bacpy(&data.bdaddr, &info->bdaddr); 4883 data.pscan_rep_mode = info->pscan_rep_mode; 4884 data.pscan_period_mode = info->pscan_period_mode; 4885 data.pscan_mode = info->pscan_mode; 4886 memcpy(data.dev_class, info->dev_class, 3); 4887 data.clock_offset = info->clock_offset; 4888 data.rssi = info->rssi; 4889 data.ssp_mode = 0x00; 4890 4891 flags = hci_inquiry_cache_update(hdev, &data, false); 4892 4893 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 4894 info->dev_class, info->rssi, 4895 flags, NULL, 0, NULL, 0, 0); 4896 } 4897 } else if (skb->len == array_size(ev->num, 4898 sizeof(struct inquiry_info_rssi))) { 4899 struct inquiry_info_rssi *info; 4900 4901 for (i = 0; i < ev->num; i++) { 4902 u32 flags; 4903 4904 info = hci_ev_skb_pull(hdev, skb, 4905 HCI_EV_INQUIRY_RESULT_WITH_RSSI, 4906 sizeof(*info)); 4907 if (!info) { 4908 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", 4909 HCI_EV_INQUIRY_RESULT_WITH_RSSI); 4910 goto unlock; 4911 } 4912 4913 bacpy(&data.bdaddr, &info->bdaddr); 4914 data.pscan_rep_mode = info->pscan_rep_mode; 4915 data.pscan_period_mode = info->pscan_period_mode; 4916 data.pscan_mode = 0x00; 4917 memcpy(data.dev_class, info->dev_class, 3); 4918 data.clock_offset = info->clock_offset; 4919 data.rssi = info->rssi; 4920 data.ssp_mode = 0x00; 4921 4922 flags = hci_inquiry_cache_update(hdev, &data, false); 4923 4924 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 4925 info->dev_class, info->rssi, 4926 flags, NULL, 0, NULL, 0, 0); 4927 } 4928 } else { 4929 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x", 4930 HCI_EV_INQUIRY_RESULT_WITH_RSSI); 4931 } 4932 unlock: 4933 hci_dev_unlock(hdev); 4934 } 4935 4936 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data, 4937 struct sk_buff *skb) 4938 { 4939 struct hci_ev_remote_ext_features *ev = data; 4940 struct hci_conn *conn; 4941 4942 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 4943 4944 hci_dev_lock(hdev); 4945 4946 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 4947 if (!conn) 4948 goto unlock; 4949 4950 if (ev->page < HCI_MAX_PAGES) 4951 memcpy(conn->features[ev->page], ev->features, 8); 4952 4953 if (!ev->status && ev->page == 0x01) { 4954 struct inquiry_entry *ie; 4955 4956 ie = hci_inquiry_cache_lookup(hdev, &conn->dst); 4957 if (ie) 4958 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP); 4959 4960 if (ev->features[0] & LMP_HOST_SSP) { 4961 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 4962 } else { 4963 /* It is mandatory by the Bluetooth specification that 4964 * Extended Inquiry Results are only used when Secure 4965 * Simple Pairing is enabled, but some devices violate 4966 * this. 4967 * 4968 * To make these devices work, the internal SSP 4969 * enabled flag needs to be cleared if the remote host 4970 * features do not indicate SSP support */ 4971 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 4972 } 4973 4974 if (ev->features[0] & LMP_HOST_SC) 4975 set_bit(HCI_CONN_SC_ENABLED, &conn->flags); 4976 } 4977 4978 if (conn->state != BT_CONFIG) 4979 goto unlock; 4980 4981 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) { 4982 struct hci_cp_remote_name_req cp; 4983 memset(&cp, 0, sizeof(cp)); 4984 bacpy(&cp.bdaddr, &conn->dst); 4985 cp.pscan_rep_mode = 0x02; 4986 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp); 4987 } else { 4988 mgmt_device_connected(hdev, conn, NULL, 0); 4989 } 4990 4991 if (!hci_outgoing_auth_needed(hdev, conn)) { 4992 conn->state = BT_CONNECTED; 4993 hci_connect_cfm(conn, ev->status); 4994 hci_conn_drop(conn); 4995 } 4996 4997 unlock: 4998 hci_dev_unlock(hdev); 4999 } 5000 5001 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data, 5002 struct sk_buff *skb) 5003 { 5004 struct hci_ev_sync_conn_complete *ev = data; 5005 struct hci_conn *conn; 5006 u8 status = ev->status; 5007 5008 switch (ev->link_type) { 5009 case SCO_LINK: 5010 case ESCO_LINK: 5011 break; 5012 default: 5013 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type 5014 * for HCI_Synchronous_Connection_Complete is limited to 5015 * either SCO or eSCO 5016 */ 5017 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type"); 5018 return; 5019 } 5020 5021 bt_dev_dbg(hdev, "status 0x%2.2x", status); 5022 5023 hci_dev_lock(hdev); 5024 5025 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr); 5026 if (!conn) { 5027 if (ev->link_type == ESCO_LINK) 5028 goto unlock; 5029 5030 /* When the link type in the event indicates SCO connection 5031 * and lookup of the connection object fails, then check 5032 * if an eSCO connection object exists. 5033 * 5034 * The core limits the synchronous connections to either 5035 * SCO or eSCO. The eSCO connection is preferred and tried 5036 * to be setup first and until successfully established, 5037 * the link type will be hinted as eSCO. 5038 */ 5039 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr); 5040 if (!conn) 5041 goto unlock; 5042 } 5043 5044 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection. 5045 * Processing it more than once per connection can corrupt kernel memory. 5046 * 5047 * As the connection handle is set here for the first time, it indicates 5048 * whether the connection is already set up. 5049 */ 5050 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { 5051 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection"); 5052 goto unlock; 5053 } 5054 5055 switch (status) { 5056 case 0x00: 5057 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle)); 5058 if (status) { 5059 conn->state = BT_CLOSED; 5060 break; 5061 } 5062 5063 conn->state = BT_CONNECTED; 5064 conn->type = ev->link_type; 5065 5066 hci_debugfs_create_conn(conn); 5067 hci_conn_add_sysfs(conn); 5068 break; 5069 5070 case 0x10: /* Connection Accept Timeout */ 5071 case 0x0d: /* Connection Rejected due to Limited Resources */ 5072 case 0x11: /* Unsupported Feature or Parameter Value */ 5073 case 0x1c: /* SCO interval rejected */ 5074 case 0x1a: /* Unsupported Remote Feature */ 5075 case 0x1e: /* Invalid LMP Parameters */ 5076 case 0x1f: /* Unspecified error */ 5077 case 0x20: /* Unsupported LMP Parameter value */ 5078 if (conn->out) { 5079 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | 5080 (hdev->esco_type & EDR_ESCO_MASK); 5081 if (hci_setup_sync(conn, conn->parent->handle)) 5082 goto unlock; 5083 } 5084 fallthrough; 5085 5086 default: 5087 conn->state = BT_CLOSED; 5088 break; 5089 } 5090 5091 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode); 5092 /* Notify only in case of SCO over HCI transport data path which 5093 * is zero and non-zero value shall be non-HCI transport data path 5094 */ 5095 if (conn->codec.data_path == 0 && hdev->notify) { 5096 switch (ev->air_mode) { 5097 case 0x02: 5098 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD); 5099 break; 5100 case 0x03: 5101 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP); 5102 break; 5103 } 5104 } 5105 5106 hci_connect_cfm(conn, status); 5107 if (status) 5108 hci_conn_del(conn); 5109 5110 unlock: 5111 hci_dev_unlock(hdev); 5112 } 5113 5114 static inline size_t eir_get_length(u8 *eir, size_t eir_len) 5115 { 5116 size_t parsed = 0; 5117 5118 while (parsed < eir_len) { 5119 u8 field_len = eir[0]; 5120 5121 if (field_len == 0) 5122 return parsed; 5123 5124 parsed += field_len + 1; 5125 eir += field_len + 1; 5126 } 5127 5128 return eir_len; 5129 } 5130 5131 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata, 5132 struct sk_buff *skb) 5133 { 5134 struct hci_ev_ext_inquiry_result *ev = edata; 5135 struct inquiry_data data; 5136 size_t eir_len; 5137 int i; 5138 5139 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT, 5140 flex_array_size(ev, info, ev->num))) 5141 return; 5142 5143 bt_dev_dbg(hdev, "num %d", ev->num); 5144 5145 if (!ev->num) 5146 return; 5147 5148 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) 5149 return; 5150 5151 hci_dev_lock(hdev); 5152 5153 for (i = 0; i < ev->num; i++) { 5154 struct extended_inquiry_info *info = &ev->info[i]; 5155 u32 flags; 5156 bool name_known; 5157 5158 bacpy(&data.bdaddr, &info->bdaddr); 5159 data.pscan_rep_mode = info->pscan_rep_mode; 5160 data.pscan_period_mode = info->pscan_period_mode; 5161 data.pscan_mode = 0x00; 5162 memcpy(data.dev_class, info->dev_class, 3); 5163 data.clock_offset = info->clock_offset; 5164 data.rssi = info->rssi; 5165 data.ssp_mode = 0x01; 5166 5167 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5168 name_known = eir_get_data(info->data, 5169 sizeof(info->data), 5170 EIR_NAME_COMPLETE, NULL); 5171 else 5172 name_known = true; 5173 5174 flags = hci_inquiry_cache_update(hdev, &data, name_known); 5175 5176 eir_len = eir_get_length(info->data, sizeof(info->data)); 5177 5178 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00, 5179 info->dev_class, info->rssi, 5180 flags, info->data, eir_len, NULL, 0, 0); 5181 } 5182 5183 hci_dev_unlock(hdev); 5184 } 5185 5186 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data, 5187 struct sk_buff *skb) 5188 { 5189 struct hci_ev_key_refresh_complete *ev = data; 5190 struct hci_conn *conn; 5191 5192 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status, 5193 __le16_to_cpu(ev->handle)); 5194 5195 hci_dev_lock(hdev); 5196 5197 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 5198 if (!conn) 5199 goto unlock; 5200 5201 /* For BR/EDR the necessary steps are taken through the 5202 * auth_complete event. 5203 */ 5204 if (conn->type != LE_LINK) 5205 goto unlock; 5206 5207 if (!ev->status) 5208 conn->sec_level = conn->pending_sec_level; 5209 5210 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 5211 5212 if (ev->status && conn->state == BT_CONNECTED) { 5213 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE); 5214 hci_conn_drop(conn); 5215 goto unlock; 5216 } 5217 5218 if (conn->state == BT_CONFIG) { 5219 if (!ev->status) 5220 conn->state = BT_CONNECTED; 5221 5222 hci_connect_cfm(conn, ev->status); 5223 hci_conn_drop(conn); 5224 } else { 5225 hci_auth_cfm(conn, ev->status); 5226 5227 hci_conn_hold(conn); 5228 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 5229 hci_conn_drop(conn); 5230 } 5231 5232 unlock: 5233 hci_dev_unlock(hdev); 5234 } 5235 5236 static u8 hci_get_auth_req(struct hci_conn *conn) 5237 { 5238 /* If remote requests no-bonding follow that lead */ 5239 if (conn->remote_auth == HCI_AT_NO_BONDING || 5240 conn->remote_auth == HCI_AT_NO_BONDING_MITM) 5241 return conn->remote_auth | (conn->auth_type & 0x01); 5242 5243 /* If both remote and local have enough IO capabilities, require 5244 * MITM protection 5245 */ 5246 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT && 5247 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) 5248 return conn->remote_auth | 0x01; 5249 5250 /* No MITM protection possible so ignore remote requirement */ 5251 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01); 5252 } 5253 5254 static u8 bredr_oob_data_present(struct hci_conn *conn) 5255 { 5256 struct hci_dev *hdev = conn->hdev; 5257 struct oob_data *data; 5258 5259 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR); 5260 if (!data) 5261 return 0x00; 5262 5263 if (bredr_sc_enabled(hdev)) { 5264 /* When Secure Connections is enabled, then just 5265 * return the present value stored with the OOB 5266 * data. The stored value contains the right present 5267 * information. However it can only be trusted when 5268 * not in Secure Connection Only mode. 5269 */ 5270 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY)) 5271 return data->present; 5272 5273 /* When Secure Connections Only mode is enabled, then 5274 * the P-256 values are required. If they are not 5275 * available, then do not declare that OOB data is 5276 * present. 5277 */ 5278 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) || 5279 !crypto_memneq(data->hash256, ZERO_KEY, 16)) 5280 return 0x00; 5281 5282 return 0x02; 5283 } 5284 5285 /* When Secure Connections is not enabled or actually 5286 * not supported by the hardware, then check that if 5287 * P-192 data values are present. 5288 */ 5289 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) || 5290 !crypto_memneq(data->hash192, ZERO_KEY, 16)) 5291 return 0x00; 5292 5293 return 0x01; 5294 } 5295 5296 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data, 5297 struct sk_buff *skb) 5298 { 5299 struct hci_ev_io_capa_request *ev = data; 5300 struct hci_conn *conn; 5301 5302 bt_dev_dbg(hdev, ""); 5303 5304 hci_dev_lock(hdev); 5305 5306 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5307 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) 5308 goto unlock; 5309 5310 /* Assume remote supports SSP since it has triggered this event */ 5311 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 5312 5313 hci_conn_hold(conn); 5314 5315 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 5316 goto unlock; 5317 5318 /* Allow pairing if we're pairable, the initiators of the 5319 * pairing or if the remote is not requesting bonding. 5320 */ 5321 if (hci_dev_test_flag(hdev, HCI_BONDABLE) || 5322 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) || 5323 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) { 5324 struct hci_cp_io_capability_reply cp; 5325 5326 bacpy(&cp.bdaddr, &ev->bdaddr); 5327 /* Change the IO capability from KeyboardDisplay 5328 * to DisplayYesNo as it is not supported by BT spec. */ 5329 cp.capability = (conn->io_capability == 0x04) ? 5330 HCI_IO_DISPLAY_YESNO : conn->io_capability; 5331 5332 /* If we are initiators, there is no remote information yet */ 5333 if (conn->remote_auth == 0xff) { 5334 /* Request MITM protection if our IO caps allow it 5335 * except for the no-bonding case. 5336 */ 5337 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT && 5338 conn->auth_type != HCI_AT_NO_BONDING) 5339 conn->auth_type |= 0x01; 5340 } else { 5341 conn->auth_type = hci_get_auth_req(conn); 5342 } 5343 5344 /* If we're not bondable, force one of the non-bondable 5345 * authentication requirement values. 5346 */ 5347 if (!hci_dev_test_flag(hdev, HCI_BONDABLE)) 5348 conn->auth_type &= HCI_AT_NO_BONDING_MITM; 5349 5350 cp.authentication = conn->auth_type; 5351 cp.oob_data = bredr_oob_data_present(conn); 5352 5353 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY, 5354 sizeof(cp), &cp); 5355 } else { 5356 struct hci_cp_io_capability_neg_reply cp; 5357 5358 bacpy(&cp.bdaddr, &ev->bdaddr); 5359 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED; 5360 5361 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY, 5362 sizeof(cp), &cp); 5363 } 5364 5365 unlock: 5366 hci_dev_unlock(hdev); 5367 } 5368 5369 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data, 5370 struct sk_buff *skb) 5371 { 5372 struct hci_ev_io_capa_reply *ev = data; 5373 struct hci_conn *conn; 5374 5375 bt_dev_dbg(hdev, ""); 5376 5377 hci_dev_lock(hdev); 5378 5379 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5380 if (!conn) 5381 goto unlock; 5382 5383 conn->remote_cap = ev->capability; 5384 conn->remote_auth = ev->authentication; 5385 5386 unlock: 5387 hci_dev_unlock(hdev); 5388 } 5389 5390 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data, 5391 struct sk_buff *skb) 5392 { 5393 struct hci_ev_user_confirm_req *ev = data; 5394 int loc_mitm, rem_mitm, confirm_hint = 0; 5395 struct hci_conn *conn; 5396 5397 bt_dev_dbg(hdev, ""); 5398 5399 hci_dev_lock(hdev); 5400 5401 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 5402 goto unlock; 5403 5404 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5405 if (!conn) 5406 goto unlock; 5407 5408 loc_mitm = (conn->auth_type & 0x01); 5409 rem_mitm = (conn->remote_auth & 0x01); 5410 5411 /* If we require MITM but the remote device can't provide that 5412 * (it has NoInputNoOutput) then reject the confirmation 5413 * request. We check the security level here since it doesn't 5414 * necessarily match conn->auth_type. 5415 */ 5416 if (conn->pending_sec_level > BT_SECURITY_MEDIUM && 5417 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) { 5418 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM"); 5419 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY, 5420 sizeof(ev->bdaddr), &ev->bdaddr); 5421 goto unlock; 5422 } 5423 5424 /* If no side requires MITM protection; use JUST_CFM method */ 5425 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) && 5426 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) { 5427 5428 /* If we're not the initiator of request authorization and the 5429 * local IO capability is not NoInputNoOutput, use JUST_WORKS 5430 * method (mgmt_user_confirm with confirm_hint set to 1). 5431 */ 5432 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && 5433 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) { 5434 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor"); 5435 confirm_hint = 1; 5436 goto confirm; 5437 } 5438 5439 /* If there already exists link key in local host, leave the 5440 * decision to user space since the remote device could be 5441 * legitimate or malicious. 5442 */ 5443 if (hci_find_link_key(hdev, &ev->bdaddr)) { 5444 bt_dev_dbg(hdev, "Local host already has link key"); 5445 confirm_hint = 1; 5446 goto confirm; 5447 } 5448 5449 BT_DBG("Auto-accept of user confirmation with %ums delay", 5450 hdev->auto_accept_delay); 5451 5452 if (hdev->auto_accept_delay > 0) { 5453 int delay = msecs_to_jiffies(hdev->auto_accept_delay); 5454 queue_delayed_work(conn->hdev->workqueue, 5455 &conn->auto_accept_work, delay); 5456 goto unlock; 5457 } 5458 5459 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, 5460 sizeof(ev->bdaddr), &ev->bdaddr); 5461 goto unlock; 5462 } 5463 5464 confirm: 5465 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0, 5466 le32_to_cpu(ev->passkey), confirm_hint); 5467 5468 unlock: 5469 hci_dev_unlock(hdev); 5470 } 5471 5472 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data, 5473 struct sk_buff *skb) 5474 { 5475 struct hci_ev_user_passkey_req *ev = data; 5476 5477 bt_dev_dbg(hdev, ""); 5478 5479 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5480 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0); 5481 } 5482 5483 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data, 5484 struct sk_buff *skb) 5485 { 5486 struct hci_ev_user_passkey_notify *ev = data; 5487 struct hci_conn *conn; 5488 5489 bt_dev_dbg(hdev, ""); 5490 5491 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5492 if (!conn) 5493 return; 5494 5495 conn->passkey_notify = __le32_to_cpu(ev->passkey); 5496 conn->passkey_entered = 0; 5497 5498 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5499 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, 5500 conn->dst_type, conn->passkey_notify, 5501 conn->passkey_entered); 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 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5513 if (!conn) 5514 return; 5515 5516 switch (ev->type) { 5517 case HCI_KEYPRESS_STARTED: 5518 conn->passkey_entered = 0; 5519 return; 5520 5521 case HCI_KEYPRESS_ENTERED: 5522 conn->passkey_entered++; 5523 break; 5524 5525 case HCI_KEYPRESS_ERASED: 5526 conn->passkey_entered--; 5527 break; 5528 5529 case HCI_KEYPRESS_CLEARED: 5530 conn->passkey_entered = 0; 5531 break; 5532 5533 case HCI_KEYPRESS_COMPLETED: 5534 return; 5535 } 5536 5537 if (hci_dev_test_flag(hdev, HCI_MGMT)) 5538 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, 5539 conn->dst_type, conn->passkey_notify, 5540 conn->passkey_entered); 5541 } 5542 5543 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data, 5544 struct sk_buff *skb) 5545 { 5546 struct hci_ev_simple_pair_complete *ev = data; 5547 struct hci_conn *conn; 5548 5549 bt_dev_dbg(hdev, ""); 5550 5551 hci_dev_lock(hdev); 5552 5553 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5554 if (!conn || !hci_conn_ssp_enabled(conn)) 5555 goto unlock; 5556 5557 /* Reset the authentication requirement to unknown */ 5558 conn->remote_auth = 0xff; 5559 5560 /* To avoid duplicate auth_failed events to user space we check 5561 * the HCI_CONN_AUTH_PEND flag which will be set if we 5562 * initiated the authentication. A traditional auth_complete 5563 * event gets always produced as initiator and is also mapped to 5564 * the mgmt_auth_failed event */ 5565 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status) 5566 mgmt_auth_failed(conn, ev->status); 5567 5568 hci_conn_drop(conn); 5569 5570 unlock: 5571 hci_dev_unlock(hdev); 5572 } 5573 5574 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data, 5575 struct sk_buff *skb) 5576 { 5577 struct hci_ev_remote_host_features *ev = data; 5578 struct inquiry_entry *ie; 5579 struct hci_conn *conn; 5580 5581 bt_dev_dbg(hdev, ""); 5582 5583 hci_dev_lock(hdev); 5584 5585 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); 5586 if (conn) 5587 memcpy(conn->features[1], ev->features, 8); 5588 5589 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr); 5590 if (ie) 5591 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP); 5592 5593 hci_dev_unlock(hdev); 5594 } 5595 5596 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata, 5597 struct sk_buff *skb) 5598 { 5599 struct hci_ev_remote_oob_data_request *ev = edata; 5600 struct oob_data *data; 5601 5602 bt_dev_dbg(hdev, ""); 5603 5604 hci_dev_lock(hdev); 5605 5606 if (!hci_dev_test_flag(hdev, HCI_MGMT)) 5607 goto unlock; 5608 5609 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR); 5610 if (!data) { 5611 struct hci_cp_remote_oob_data_neg_reply cp; 5612 5613 bacpy(&cp.bdaddr, &ev->bdaddr); 5614 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY, 5615 sizeof(cp), &cp); 5616 goto unlock; 5617 } 5618 5619 if (bredr_sc_enabled(hdev)) { 5620 struct hci_cp_remote_oob_ext_data_reply cp; 5621 5622 bacpy(&cp.bdaddr, &ev->bdaddr); 5623 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) { 5624 memset(cp.hash192, 0, sizeof(cp.hash192)); 5625 memset(cp.rand192, 0, sizeof(cp.rand192)); 5626 } else { 5627 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192)); 5628 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192)); 5629 } 5630 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256)); 5631 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256)); 5632 5633 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY, 5634 sizeof(cp), &cp); 5635 } else { 5636 struct hci_cp_remote_oob_data_reply cp; 5637 5638 bacpy(&cp.bdaddr, &ev->bdaddr); 5639 memcpy(cp.hash, data->hash192, sizeof(cp.hash)); 5640 memcpy(cp.rand, data->rand192, sizeof(cp.rand)); 5641 5642 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY, 5643 sizeof(cp), &cp); 5644 } 5645 5646 unlock: 5647 hci_dev_unlock(hdev); 5648 } 5649 5650 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr, 5651 u8 bdaddr_type, bdaddr_t *local_rpa) 5652 { 5653 if (conn->out) { 5654 conn->dst_type = bdaddr_type; 5655 conn->resp_addr_type = bdaddr_type; 5656 bacpy(&conn->resp_addr, bdaddr); 5657 5658 /* Check if the controller has set a Local RPA then it must be 5659 * used instead or hdev->rpa. 5660 */ 5661 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) { 5662 conn->init_addr_type = ADDR_LE_DEV_RANDOM; 5663 bacpy(&conn->init_addr, local_rpa); 5664 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) { 5665 conn->init_addr_type = ADDR_LE_DEV_RANDOM; 5666 bacpy(&conn->init_addr, &conn->hdev->rpa); 5667 } else { 5668 hci_copy_identity_address(conn->hdev, &conn->init_addr, 5669 &conn->init_addr_type); 5670 } 5671 } else { 5672 conn->resp_addr_type = conn->hdev->adv_addr_type; 5673 /* Check if the controller has set a Local RPA then it must be 5674 * used instead or hdev->rpa. 5675 */ 5676 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) { 5677 conn->resp_addr_type = ADDR_LE_DEV_RANDOM; 5678 bacpy(&conn->resp_addr, local_rpa); 5679 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) { 5680 /* In case of ext adv, resp_addr will be updated in 5681 * Adv Terminated event. 5682 */ 5683 if (!ext_adv_capable(conn->hdev)) 5684 bacpy(&conn->resp_addr, 5685 &conn->hdev->random_addr); 5686 } else { 5687 bacpy(&conn->resp_addr, &conn->hdev->bdaddr); 5688 } 5689 5690 conn->init_addr_type = bdaddr_type; 5691 bacpy(&conn->init_addr, bdaddr); 5692 5693 /* For incoming connections, set the default minimum 5694 * and maximum connection interval. They will be used 5695 * to check if the parameters are in range and if not 5696 * trigger the connection update procedure. 5697 */ 5698 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval; 5699 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval; 5700 } 5701 } 5702 5703 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status, 5704 bdaddr_t *bdaddr, u8 bdaddr_type, 5705 bdaddr_t *local_rpa, u8 role, u16 handle, 5706 u16 interval, u16 latency, 5707 u16 supervision_timeout) 5708 { 5709 struct hci_conn_params *params; 5710 struct hci_conn *conn; 5711 struct smp_irk *irk; 5712 u8 addr_type; 5713 int err; 5714 5715 hci_dev_lock(hdev); 5716 5717 /* All controllers implicitly stop advertising in the event of a 5718 * connection, so ensure that the state bit is cleared. 5719 */ 5720 hci_dev_clear_flag(hdev, HCI_LE_ADV); 5721 5722 /* Check for existing connection: 5723 * 5724 * 1. If it doesn't exist then use the role to create a new object. 5725 * 2. If it does exist confirm that it is connecting/BT_CONNECT in case 5726 * of initiator/master role since there could be a collision where 5727 * either side is attempting to connect or something like a fuzzing 5728 * testing is trying to play tricks to destroy the hcon object before 5729 * it even attempts to connect (e.g. hcon->state == BT_OPEN). 5730 */ 5731 conn = hci_conn_hash_lookup_role(hdev, LE_LINK, role, bdaddr); 5732 if (!conn || 5733 (conn->role == HCI_ROLE_MASTER && conn->state != BT_CONNECT)) { 5734 /* In case of error status and there is no connection pending 5735 * just unlock as there is nothing to cleanup. 5736 */ 5737 if (status) 5738 goto unlock; 5739 5740 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, bdaddr_type, 5741 role); 5742 if (IS_ERR(conn)) { 5743 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn)); 5744 goto unlock; 5745 } 5746 5747 /* If we didn't have a hci_conn object previously 5748 * but we're in central role this must be something 5749 * initiated using an accept list. Since accept list based 5750 * connections are not "first class citizens" we don't 5751 * have full tracking of them. Therefore, we go ahead 5752 * with a "best effort" approach of determining the 5753 * initiator address based on the HCI_PRIVACY flag. 5754 */ 5755 if (conn->out) { 5756 conn->resp_addr_type = bdaddr_type; 5757 bacpy(&conn->resp_addr, bdaddr); 5758 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) { 5759 conn->init_addr_type = ADDR_LE_DEV_RANDOM; 5760 bacpy(&conn->init_addr, &hdev->rpa); 5761 } else { 5762 hci_copy_identity_address(hdev, 5763 &conn->init_addr, 5764 &conn->init_addr_type); 5765 } 5766 } 5767 } else { 5768 cancel_delayed_work(&conn->le_conn_timeout); 5769 } 5770 5771 /* The HCI_LE_Connection_Complete event is only sent once per connection. 5772 * Processing it more than once per connection can corrupt kernel memory. 5773 * 5774 * As the connection handle is set here for the first time, it indicates 5775 * whether the connection is already set up. 5776 */ 5777 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) { 5778 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection"); 5779 goto unlock; 5780 } 5781 5782 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa); 5783 5784 /* Lookup the identity address from the stored connection 5785 * address and address type. 5786 * 5787 * When establishing connections to an identity address, the 5788 * connection procedure will store the resolvable random 5789 * address first. Now if it can be converted back into the 5790 * identity address, start using the identity address from 5791 * now on. 5792 */ 5793 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type); 5794 if (irk) { 5795 bacpy(&conn->dst, &irk->bdaddr); 5796 conn->dst_type = irk->addr_type; 5797 } 5798 5799 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL); 5800 5801 /* All connection failure handling is taken care of by the 5802 * hci_conn_failed function which is triggered by the HCI 5803 * request completion callbacks used for connecting. 5804 */ 5805 if (status || hci_conn_set_handle(conn, handle)) 5806 goto unlock; 5807 5808 /* Drop the connection if it has been aborted */ 5809 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) { 5810 hci_conn_drop(conn); 5811 goto unlock; 5812 } 5813 5814 if (conn->dst_type == ADDR_LE_DEV_PUBLIC) 5815 addr_type = BDADDR_LE_PUBLIC; 5816 else 5817 addr_type = BDADDR_LE_RANDOM; 5818 5819 /* Drop the connection if the device is blocked */ 5820 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) { 5821 hci_conn_drop(conn); 5822 goto unlock; 5823 } 5824 5825 mgmt_device_connected(hdev, conn, NULL, 0); 5826 5827 conn->sec_level = BT_SECURITY_LOW; 5828 conn->state = BT_CONFIG; 5829 5830 /* Store current advertising instance as connection advertising instance 5831 * when software rotation is in use so it can be re-enabled when 5832 * disconnected. 5833 */ 5834 if (!ext_adv_capable(hdev)) 5835 conn->adv_instance = hdev->cur_adv_instance; 5836 5837 conn->le_conn_interval = interval; 5838 conn->le_conn_latency = latency; 5839 conn->le_supv_timeout = supervision_timeout; 5840 5841 hci_debugfs_create_conn(conn); 5842 hci_conn_add_sysfs(conn); 5843 5844 err = hci_le_read_remote_features(conn); 5845 if (err) { 5846 conn->state = BT_CONNECTED; 5847 hci_connect_cfm(conn, status); 5848 } 5849 5850 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, 5851 conn->dst_type); 5852 if (params) { 5853 hci_pend_le_list_del_init(params); 5854 if (params->conn) { 5855 hci_conn_drop(params->conn); 5856 hci_conn_put(params->conn); 5857 params->conn = NULL; 5858 } 5859 } 5860 5861 unlock: 5862 hci_update_passive_scan(hdev); 5863 hci_dev_unlock(hdev); 5864 } 5865 5866 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data, 5867 struct sk_buff *skb) 5868 { 5869 struct hci_ev_le_conn_complete *ev = data; 5870 5871 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 5872 5873 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type, 5874 NULL, ev->role, le16_to_cpu(ev->handle), 5875 le16_to_cpu(ev->interval), 5876 le16_to_cpu(ev->latency), 5877 le16_to_cpu(ev->supervision_timeout)); 5878 } 5879 5880 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data, 5881 struct sk_buff *skb) 5882 { 5883 struct hci_ev_le_enh_conn_complete *ev = data; 5884 5885 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 5886 5887 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type, 5888 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle), 5889 le16_to_cpu(ev->interval), 5890 le16_to_cpu(ev->latency), 5891 le16_to_cpu(ev->supervision_timeout)); 5892 } 5893 5894 static void hci_le_pa_sync_lost_evt(struct hci_dev *hdev, void *data, 5895 struct sk_buff *skb) 5896 { 5897 struct hci_ev_le_pa_sync_lost *ev = data; 5898 u16 handle = le16_to_cpu(ev->handle); 5899 struct hci_conn *conn; 5900 5901 bt_dev_dbg(hdev, "sync handle 0x%4.4x", handle); 5902 5903 hci_dev_lock(hdev); 5904 5905 /* Delete the pa sync connection */ 5906 conn = hci_conn_hash_lookup_pa_sync_handle(hdev, handle); 5907 if (conn) { 5908 clear_bit(HCI_CONN_BIG_SYNC, &conn->flags); 5909 clear_bit(HCI_CONN_PA_SYNC, &conn->flags); 5910 hci_disconn_cfm(conn, HCI_ERROR_REMOTE_USER_TERM); 5911 hci_conn_del(conn); 5912 } 5913 5914 hci_dev_unlock(hdev); 5915 } 5916 5917 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data, 5918 struct sk_buff *skb) 5919 { 5920 struct hci_evt_le_ext_adv_set_term *ev = data; 5921 struct hci_conn *conn; 5922 struct adv_info *adv, *n; 5923 5924 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 5925 5926 /* The Bluetooth Core 5.3 specification clearly states that this event 5927 * shall not be sent when the Host disables the advertising set. So in 5928 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event. 5929 * 5930 * When the Host disables an advertising set, all cleanup is done via 5931 * its command callback and not needed to be duplicated here. 5932 */ 5933 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) { 5934 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event"); 5935 return; 5936 } 5937 5938 hci_dev_lock(hdev); 5939 5940 adv = hci_find_adv_instance(hdev, ev->handle); 5941 5942 if (ev->status) { 5943 if (!adv) 5944 goto unlock; 5945 5946 /* Remove advertising as it has been terminated */ 5947 hci_remove_adv_instance(hdev, ev->handle); 5948 mgmt_advertising_removed(NULL, hdev, ev->handle); 5949 5950 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { 5951 if (adv->enabled) 5952 goto unlock; 5953 } 5954 5955 /* We are no longer advertising, clear HCI_LE_ADV */ 5956 hci_dev_clear_flag(hdev, HCI_LE_ADV); 5957 goto unlock; 5958 } 5959 5960 if (adv) 5961 adv->enabled = false; 5962 5963 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle)); 5964 if (conn) { 5965 /* Store handle in the connection so the correct advertising 5966 * instance can be re-enabled when disconnected. 5967 */ 5968 conn->adv_instance = ev->handle; 5969 5970 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM || 5971 bacmp(&conn->resp_addr, BDADDR_ANY)) 5972 goto unlock; 5973 5974 if (!ev->handle) { 5975 bacpy(&conn->resp_addr, &hdev->random_addr); 5976 goto unlock; 5977 } 5978 5979 if (adv) 5980 bacpy(&conn->resp_addr, &adv->random_addr); 5981 } 5982 5983 unlock: 5984 hci_dev_unlock(hdev); 5985 } 5986 5987 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle) 5988 { 5989 struct hci_cp_le_pa_term_sync cp; 5990 5991 memset(&cp, 0, sizeof(cp)); 5992 cp.handle = handle; 5993 5994 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp); 5995 } 5996 5997 static void hci_le_past_received_evt(struct hci_dev *hdev, void *data, 5998 struct sk_buff *skb) 5999 { 6000 struct hci_ev_le_past_received *ev = data; 6001 int mask = hdev->link_mode; 6002 __u8 flags = 0; 6003 struct hci_conn *pa_sync, *conn; 6004 6005 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6006 6007 hci_dev_lock(hdev); 6008 6009 hci_dev_clear_flag(hdev, HCI_PA_SYNC); 6010 6011 conn = hci_conn_hash_lookup_create_pa_sync(hdev); 6012 if (!conn) { 6013 bt_dev_err(hdev, 6014 "Unable to find connection for dst %pMR sid 0x%2.2x", 6015 &ev->bdaddr, ev->sid); 6016 goto unlock; 6017 } 6018 6019 conn->sync_handle = le16_to_cpu(ev->sync_handle); 6020 conn->sid = HCI_SID_INVALID; 6021 6022 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, PA_LINK, 6023 &flags); 6024 if (!(mask & HCI_LM_ACCEPT)) { 6025 hci_le_pa_term_sync(hdev, ev->sync_handle); 6026 goto unlock; 6027 } 6028 6029 if (!(flags & HCI_PROTO_DEFER)) 6030 goto unlock; 6031 6032 /* Add connection to indicate PA sync event */ 6033 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0, 6034 HCI_ROLE_SLAVE); 6035 6036 if (IS_ERR(pa_sync)) 6037 goto unlock; 6038 6039 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle); 6040 6041 if (ev->status) { 6042 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags); 6043 6044 /* Notify iso layer */ 6045 hci_connect_cfm(pa_sync, ev->status); 6046 } 6047 6048 unlock: 6049 hci_dev_unlock(hdev); 6050 } 6051 6052 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data, 6053 struct sk_buff *skb) 6054 { 6055 struct hci_ev_le_conn_update_complete *ev = data; 6056 struct hci_conn *conn; 6057 6058 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6059 6060 if (ev->status) 6061 return; 6062 6063 hci_dev_lock(hdev); 6064 6065 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6066 if (conn) { 6067 conn->le_conn_interval = le16_to_cpu(ev->interval); 6068 conn->le_conn_latency = le16_to_cpu(ev->latency); 6069 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout); 6070 } 6071 6072 hci_dev_unlock(hdev); 6073 } 6074 6075 /* This function requires the caller holds hdev->lock */ 6076 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev, 6077 bdaddr_t *addr, 6078 u8 addr_type, bool addr_resolved, 6079 u8 adv_type, u8 phy, u8 sec_phy) 6080 { 6081 struct hci_conn *conn; 6082 struct hci_conn_params *params; 6083 6084 /* If the event is not connectable don't proceed further */ 6085 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND) 6086 return NULL; 6087 6088 /* Ignore if the device is blocked or hdev is suspended */ 6089 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) || 6090 hdev->suspended) 6091 return NULL; 6092 6093 /* Most controller will fail if we try to create new connections 6094 * while we have an existing one in peripheral role. 6095 */ 6096 if (hdev->conn_hash.le_num_peripheral > 0 && 6097 (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_LE_STATES) || 6098 !(hdev->le_states[3] & 0x10))) 6099 return NULL; 6100 6101 /* If we're not connectable only connect devices that we have in 6102 * our pend_le_conns list. 6103 */ 6104 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr, 6105 addr_type); 6106 if (!params) 6107 return NULL; 6108 6109 if (!params->explicit_connect) { 6110 switch (params->auto_connect) { 6111 case HCI_AUTO_CONN_DIRECT: 6112 /* Only devices advertising with ADV_DIRECT_IND are 6113 * triggering a connection attempt. This is allowing 6114 * incoming connections from peripheral devices. 6115 */ 6116 if (adv_type != LE_ADV_DIRECT_IND) 6117 return NULL; 6118 break; 6119 case HCI_AUTO_CONN_ALWAYS: 6120 /* Devices advertising with ADV_IND or ADV_DIRECT_IND 6121 * are triggering a connection attempt. This means 6122 * that incoming connections from peripheral device are 6123 * accepted and also outgoing connections to peripheral 6124 * devices are established when found. 6125 */ 6126 break; 6127 default: 6128 return NULL; 6129 } 6130 } 6131 6132 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved, 6133 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout, 6134 HCI_ROLE_MASTER, phy, sec_phy); 6135 if (!IS_ERR(conn)) { 6136 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned 6137 * by higher layer that tried to connect, if no then 6138 * store the pointer since we don't really have any 6139 * other owner of the object besides the params that 6140 * triggered it. This way we can abort the connection if 6141 * the parameters get removed and keep the reference 6142 * count consistent once the connection is established. 6143 */ 6144 6145 if (!params->explicit_connect) 6146 params->conn = hci_conn_get(conn); 6147 6148 return conn; 6149 } 6150 6151 switch (PTR_ERR(conn)) { 6152 case -EBUSY: 6153 /* If hci_connect() returns -EBUSY it means there is already 6154 * an LE connection attempt going on. Since controllers don't 6155 * support more than one connection attempt at the time, we 6156 * don't consider this an error case. 6157 */ 6158 break; 6159 default: 6160 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn)); 6161 return NULL; 6162 } 6163 6164 return NULL; 6165 } 6166 6167 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr, 6168 u8 bdaddr_type, bdaddr_t *direct_addr, 6169 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi, 6170 u8 *data, u8 len, bool ext_adv, bool ctl_time, 6171 u64 instant) 6172 { 6173 struct discovery_state *d = &hdev->discovery; 6174 struct smp_irk *irk; 6175 struct hci_conn *conn; 6176 bool match, bdaddr_resolved; 6177 u32 flags; 6178 u8 *ptr; 6179 6180 switch (type) { 6181 case LE_ADV_IND: 6182 case LE_ADV_DIRECT_IND: 6183 case LE_ADV_SCAN_IND: 6184 case LE_ADV_NONCONN_IND: 6185 case LE_ADV_SCAN_RSP: 6186 break; 6187 default: 6188 bt_dev_err_ratelimited(hdev, "unknown advertising packet " 6189 "type: 0x%02x", type); 6190 return; 6191 } 6192 6193 if (len > max_adv_len(hdev)) { 6194 bt_dev_err_ratelimited(hdev, 6195 "adv larger than maximum supported"); 6196 return; 6197 } 6198 6199 /* Find the end of the data in case the report contains padded zero 6200 * bytes at the end causing an invalid length value. 6201 * 6202 * When data is NULL, len is 0 so there is no need for extra ptr 6203 * check as 'ptr < data + 0' is already false in such case. 6204 */ 6205 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) { 6206 if (ptr + 1 + *ptr > data + len) 6207 break; 6208 } 6209 6210 /* Adjust for actual length. This handles the case when remote 6211 * device is advertising with incorrect data length. 6212 */ 6213 len = ptr - data; 6214 6215 /* If the direct address is present, then this report is from 6216 * a LE Direct Advertising Report event. In that case it is 6217 * important to see if the address is matching the local 6218 * controller address. 6219 * 6220 * If local privacy is not enable the controller shall not be 6221 * generating such event since according to its documentation it is only 6222 * valid for filter_policy 0x02 and 0x03, but the fact that it did 6223 * generate LE Direct Advertising Report means it is probably broken and 6224 * won't generate any other event which can potentially break 6225 * auto-connect logic so in case local privacy is not enable this 6226 * ignores the direct_addr so it works as a regular report. 6227 */ 6228 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr && 6229 hci_dev_test_flag(hdev, HCI_PRIVACY)) { 6230 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type, 6231 &bdaddr_resolved); 6232 6233 /* Only resolvable random addresses are valid for these 6234 * kind of reports and others can be ignored. 6235 */ 6236 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type)) 6237 return; 6238 6239 /* If the local IRK of the controller does not match 6240 * with the resolvable random address provided, then 6241 * this report can be ignored. 6242 */ 6243 if (!smp_irk_matches(hdev, hdev->irk, direct_addr)) 6244 return; 6245 } 6246 6247 /* Check if we need to convert to identity address */ 6248 irk = hci_get_irk(hdev, bdaddr, bdaddr_type); 6249 if (irk) { 6250 bdaddr = &irk->bdaddr; 6251 bdaddr_type = irk->addr_type; 6252 } 6253 6254 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved); 6255 6256 /* Check if we have been requested to connect to this device. 6257 * 6258 * direct_addr is set only for directed advertising reports (it is NULL 6259 * for advertising reports) and is already verified to be RPA above. 6260 */ 6261 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved, 6262 type, phy, sec_phy); 6263 if (!ext_adv && conn && type == LE_ADV_IND && 6264 len <= max_adv_len(hdev)) { 6265 /* Store report for later inclusion by 6266 * mgmt_device_connected 6267 */ 6268 memcpy(conn->le_adv_data, data, len); 6269 conn->le_adv_data_len = len; 6270 } 6271 6272 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND) 6273 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE; 6274 else 6275 flags = 0; 6276 6277 /* All scan results should be sent up for Mesh systems */ 6278 if (hci_dev_test_flag(hdev, HCI_MESH)) { 6279 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6280 rssi, flags, data, len, NULL, 0, instant); 6281 return; 6282 } 6283 6284 /* Passive scanning shouldn't trigger any device found events, 6285 * except for devices marked as CONN_REPORT for which we do send 6286 * device found events, or advertisement monitoring requested. 6287 */ 6288 if (hdev->le_scan_type == LE_SCAN_PASSIVE) { 6289 if (type == LE_ADV_DIRECT_IND) 6290 return; 6291 6292 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports, 6293 bdaddr, bdaddr_type) && 6294 idr_is_empty(&hdev->adv_monitors_idr)) 6295 return; 6296 6297 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6298 rssi, flags, data, len, NULL, 0, 0); 6299 return; 6300 } 6301 6302 /* When receiving a scan response, then there is no way to 6303 * know if the remote device is connectable or not. However 6304 * since scan responses are merged with a previously seen 6305 * advertising report, the flags field from that report 6306 * will be used. 6307 * 6308 * In the unlikely case that a controller just sends a scan 6309 * response event that doesn't match the pending report, then 6310 * it is marked as a standalone SCAN_RSP. 6311 */ 6312 if (type == LE_ADV_SCAN_RSP) 6313 flags = MGMT_DEV_FOUND_SCAN_RSP; 6314 6315 /* If there's nothing pending either store the data from this 6316 * event or send an immediate device found event if the data 6317 * should not be stored for later. 6318 */ 6319 if (!has_pending_adv_report(hdev)) { 6320 /* If the report will trigger a SCAN_REQ store it for 6321 * later merging. 6322 */ 6323 if (!ext_adv && (type == LE_ADV_IND || 6324 type == LE_ADV_SCAN_IND)) { 6325 store_pending_adv_report(hdev, bdaddr, bdaddr_type, 6326 rssi, flags, data, len); 6327 return; 6328 } 6329 6330 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6331 rssi, flags, data, len, NULL, 0, 0); 6332 return; 6333 } 6334 6335 /* Check if the pending report is for the same device as the new one */ 6336 match = (!bacmp(bdaddr, &d->last_adv_addr) && 6337 bdaddr_type == d->last_adv_addr_type); 6338 6339 /* If the pending data doesn't match this report or this isn't a 6340 * scan response (e.g. we got a duplicate ADV_IND) then force 6341 * sending of the pending data. 6342 */ 6343 if (type != LE_ADV_SCAN_RSP || !match) { 6344 /* Send out whatever is in the cache, but skip duplicates */ 6345 if (!match) 6346 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, 6347 d->last_adv_addr_type, NULL, 6348 d->last_adv_rssi, d->last_adv_flags, 6349 d->last_adv_data, 6350 d->last_adv_data_len, NULL, 0, 0); 6351 6352 /* If the new report will trigger a SCAN_REQ store it for 6353 * later merging. 6354 */ 6355 if (!ext_adv && (type == LE_ADV_IND || 6356 type == LE_ADV_SCAN_IND)) { 6357 store_pending_adv_report(hdev, bdaddr, bdaddr_type, 6358 rssi, flags, data, len); 6359 return; 6360 } 6361 6362 /* The advertising reports cannot be merged, so clear 6363 * the pending report and send out a device found event. 6364 */ 6365 clear_pending_adv_report(hdev); 6366 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL, 6367 rssi, flags, data, len, NULL, 0, 0); 6368 return; 6369 } 6370 6371 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and 6372 * the new event is a SCAN_RSP. We can therefore proceed with 6373 * sending a merged device found event. 6374 */ 6375 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK, 6376 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags, 6377 d->last_adv_data, d->last_adv_data_len, data, len, 0); 6378 clear_pending_adv_report(hdev); 6379 } 6380 6381 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data, 6382 struct sk_buff *skb) 6383 { 6384 struct hci_ev_le_advertising_report *ev = data; 6385 u64 instant = jiffies; 6386 6387 if (!ev->num) 6388 return; 6389 6390 hci_dev_lock(hdev); 6391 6392 while (ev->num--) { 6393 struct hci_ev_le_advertising_info *info; 6394 s8 rssi; 6395 6396 info = hci_le_ev_skb_pull(hdev, skb, 6397 HCI_EV_LE_ADVERTISING_REPORT, 6398 sizeof(*info)); 6399 if (!info) 6400 break; 6401 6402 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT, 6403 info->length + 1)) 6404 break; 6405 6406 if (info->length <= max_adv_len(hdev)) { 6407 rssi = info->data[info->length]; 6408 process_adv_report(hdev, info->type, &info->bdaddr, 6409 info->bdaddr_type, NULL, 0, 6410 HCI_ADV_PHY_1M, 0, rssi, 6411 info->data, info->length, false, 6412 false, instant); 6413 } else { 6414 bt_dev_err(hdev, "Dropping invalid advertising data"); 6415 } 6416 } 6417 6418 hci_dev_unlock(hdev); 6419 } 6420 6421 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type) 6422 { 6423 u16 pdu_type = evt_type & ~LE_EXT_ADV_DATA_STATUS_MASK; 6424 6425 if (!pdu_type) 6426 return LE_ADV_NONCONN_IND; 6427 6428 if (evt_type & LE_EXT_ADV_LEGACY_PDU) { 6429 switch (evt_type) { 6430 case LE_LEGACY_ADV_IND: 6431 return LE_ADV_IND; 6432 case LE_LEGACY_ADV_DIRECT_IND: 6433 return LE_ADV_DIRECT_IND; 6434 case LE_LEGACY_ADV_SCAN_IND: 6435 return LE_ADV_SCAN_IND; 6436 case LE_LEGACY_NONCONN_IND: 6437 return LE_ADV_NONCONN_IND; 6438 case LE_LEGACY_SCAN_RSP_ADV: 6439 case LE_LEGACY_SCAN_RSP_ADV_SCAN: 6440 return LE_ADV_SCAN_RSP; 6441 } 6442 6443 goto invalid; 6444 } 6445 6446 if (evt_type & LE_EXT_ADV_CONN_IND) { 6447 if (evt_type & LE_EXT_ADV_DIRECT_IND) 6448 return LE_ADV_DIRECT_IND; 6449 6450 return LE_ADV_IND; 6451 } 6452 6453 if (evt_type & LE_EXT_ADV_SCAN_RSP) 6454 return LE_ADV_SCAN_RSP; 6455 6456 if (evt_type & LE_EXT_ADV_SCAN_IND) 6457 return LE_ADV_SCAN_IND; 6458 6459 if (evt_type & LE_EXT_ADV_DIRECT_IND) 6460 return LE_ADV_NONCONN_IND; 6461 6462 invalid: 6463 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x", 6464 evt_type); 6465 6466 return LE_ADV_INVALID; 6467 } 6468 6469 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data, 6470 struct sk_buff *skb) 6471 { 6472 struct hci_ev_le_ext_adv_report *ev = data; 6473 u64 instant = jiffies; 6474 6475 if (!ev->num) 6476 return; 6477 6478 hci_dev_lock(hdev); 6479 6480 while (ev->num--) { 6481 struct hci_ev_le_ext_adv_info *info; 6482 u8 legacy_evt_type; 6483 u16 evt_type; 6484 6485 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT, 6486 sizeof(*info)); 6487 if (!info) 6488 break; 6489 6490 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT, 6491 info->length)) 6492 break; 6493 6494 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK; 6495 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type); 6496 6497 if (hci_test_quirk(hdev, 6498 HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY)) { 6499 info->primary_phy &= 0x1f; 6500 info->secondary_phy &= 0x1f; 6501 } 6502 6503 /* Check if PA Sync is pending and if the hci_conn SID has not 6504 * been set update it. 6505 */ 6506 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) { 6507 struct hci_conn *conn; 6508 6509 conn = hci_conn_hash_lookup_create_pa_sync(hdev); 6510 if (conn && conn->sid == HCI_SID_INVALID) 6511 conn->sid = info->sid; 6512 } 6513 6514 if (legacy_evt_type != LE_ADV_INVALID) { 6515 process_adv_report(hdev, legacy_evt_type, &info->bdaddr, 6516 info->bdaddr_type, NULL, 0, 6517 info->primary_phy, 6518 info->secondary_phy, 6519 info->rssi, info->data, info->length, 6520 !(evt_type & LE_EXT_ADV_LEGACY_PDU), 6521 false, instant); 6522 } 6523 } 6524 6525 hci_dev_unlock(hdev); 6526 } 6527 6528 static void hci_le_pa_sync_established_evt(struct hci_dev *hdev, void *data, 6529 struct sk_buff *skb) 6530 { 6531 struct hci_ev_le_pa_sync_established *ev = data; 6532 int mask = hdev->link_mode; 6533 __u8 flags = 0; 6534 struct hci_conn *pa_sync, *conn; 6535 6536 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6537 6538 hci_dev_lock(hdev); 6539 6540 hci_dev_clear_flag(hdev, HCI_PA_SYNC); 6541 6542 conn = hci_conn_hash_lookup_create_pa_sync(hdev); 6543 if (!conn) { 6544 bt_dev_err(hdev, 6545 "Unable to find connection for dst %pMR sid 0x%2.2x", 6546 &ev->bdaddr, ev->sid); 6547 goto unlock; 6548 } 6549 6550 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags); 6551 6552 conn->sync_handle = le16_to_cpu(ev->handle); 6553 conn->sid = HCI_SID_INVALID; 6554 6555 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, PA_LINK, 6556 &flags); 6557 if (!(mask & HCI_LM_ACCEPT)) { 6558 hci_le_pa_term_sync(hdev, ev->handle); 6559 goto unlock; 6560 } 6561 6562 if (!(flags & HCI_PROTO_DEFER)) 6563 goto unlock; 6564 6565 /* Add connection to indicate PA sync event */ 6566 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0, 6567 HCI_ROLE_SLAVE); 6568 6569 if (IS_ERR(pa_sync)) 6570 goto unlock; 6571 6572 pa_sync->sync_handle = le16_to_cpu(ev->handle); 6573 6574 if (ev->status) { 6575 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags); 6576 6577 /* Notify iso layer */ 6578 hci_connect_cfm(pa_sync, ev->status); 6579 } 6580 6581 unlock: 6582 hci_dev_unlock(hdev); 6583 } 6584 6585 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data, 6586 struct sk_buff *skb) 6587 { 6588 struct hci_ev_le_per_adv_report *ev = data; 6589 int mask = hdev->link_mode; 6590 __u8 flags = 0; 6591 struct hci_conn *pa_sync; 6592 6593 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle)); 6594 6595 hci_dev_lock(hdev); 6596 6597 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, PA_LINK, &flags); 6598 if (!(mask & HCI_LM_ACCEPT)) 6599 goto unlock; 6600 6601 if (!(flags & HCI_PROTO_DEFER)) 6602 goto unlock; 6603 6604 pa_sync = hci_conn_hash_lookup_pa_sync_handle 6605 (hdev, 6606 le16_to_cpu(ev->sync_handle)); 6607 6608 if (!pa_sync) 6609 goto unlock; 6610 6611 if (ev->data_status == LE_PA_DATA_COMPLETE && 6612 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) { 6613 /* Notify iso layer */ 6614 hci_connect_cfm(pa_sync, 0); 6615 6616 /* Notify MGMT layer */ 6617 mgmt_device_connected(hdev, pa_sync, NULL, 0); 6618 } 6619 6620 unlock: 6621 hci_dev_unlock(hdev); 6622 } 6623 6624 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data, 6625 struct sk_buff *skb) 6626 { 6627 struct hci_ev_le_remote_feat_complete *ev = data; 6628 struct hci_conn *conn; 6629 6630 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6631 6632 hci_dev_lock(hdev); 6633 6634 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6635 if (conn) { 6636 if (!ev->status) { 6637 memcpy(conn->le_features, ev->features, 8); 6638 6639 /* Update supported PHYs */ 6640 if (!(conn->le_features[1] & HCI_LE_PHY_2M)) { 6641 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_2M; 6642 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_2M; 6643 } 6644 6645 if (!(conn->le_features[1] & HCI_LE_PHY_CODED)) { 6646 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_CODED; 6647 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_CODED; 6648 } 6649 } 6650 6651 if (conn->state == BT_CONFIG) { 6652 __u8 status; 6653 6654 /* If the local controller supports peripheral-initiated 6655 * features exchange, but the remote controller does 6656 * not, then it is possible that the error code 0x1a 6657 * for unsupported remote feature gets returned. 6658 * 6659 * In this specific case, allow the connection to 6660 * transition into connected state and mark it as 6661 * successful. 6662 */ 6663 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE && 6664 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) 6665 status = 0x00; 6666 else 6667 status = ev->status; 6668 6669 conn->state = BT_CONNECTED; 6670 hci_connect_cfm(conn, status); 6671 } 6672 } 6673 6674 hci_dev_unlock(hdev); 6675 } 6676 6677 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data, 6678 struct sk_buff *skb) 6679 { 6680 struct hci_ev_le_ltk_req *ev = data; 6681 struct hci_cp_le_ltk_reply cp; 6682 struct hci_cp_le_ltk_neg_reply neg; 6683 struct hci_conn *conn; 6684 struct smp_ltk *ltk; 6685 6686 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle)); 6687 6688 hci_dev_lock(hdev); 6689 6690 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6691 if (conn == NULL) 6692 goto not_found; 6693 6694 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role); 6695 if (!ltk) 6696 goto not_found; 6697 6698 if (smp_ltk_is_sc(ltk)) { 6699 /* With SC both EDiv and Rand are set to zero */ 6700 if (ev->ediv || ev->rand) 6701 goto not_found; 6702 } else { 6703 /* For non-SC keys check that EDiv and Rand match */ 6704 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand) 6705 goto not_found; 6706 } 6707 6708 memcpy(cp.ltk, ltk->val, ltk->enc_size); 6709 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size); 6710 cp.handle = cpu_to_le16(conn->handle); 6711 6712 conn->pending_sec_level = smp_ltk_sec_level(ltk); 6713 6714 conn->enc_key_size = ltk->enc_size; 6715 6716 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); 6717 6718 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a 6719 * temporary key used to encrypt a connection following 6720 * pairing. It is used during the Encrypted Session Setup to 6721 * distribute the keys. Later, security can be re-established 6722 * using a distributed LTK. 6723 */ 6724 if (ltk->type == SMP_STK) { 6725 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags); 6726 list_del_rcu(<k->list); 6727 kfree_rcu(ltk, rcu); 6728 } else { 6729 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags); 6730 } 6731 6732 hci_dev_unlock(hdev); 6733 6734 return; 6735 6736 not_found: 6737 neg.handle = ev->handle; 6738 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg); 6739 hci_dev_unlock(hdev); 6740 } 6741 6742 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle, 6743 u8 reason) 6744 { 6745 struct hci_cp_le_conn_param_req_neg_reply cp; 6746 6747 cp.handle = cpu_to_le16(handle); 6748 cp.reason = reason; 6749 6750 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp), 6751 &cp); 6752 } 6753 6754 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data, 6755 struct sk_buff *skb) 6756 { 6757 struct hci_ev_le_remote_conn_param_req *ev = data; 6758 struct hci_cp_le_conn_param_req_reply cp; 6759 struct hci_conn *hcon; 6760 u16 handle, min, max, latency, timeout; 6761 6762 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle)); 6763 6764 handle = le16_to_cpu(ev->handle); 6765 min = le16_to_cpu(ev->interval_min); 6766 max = le16_to_cpu(ev->interval_max); 6767 latency = le16_to_cpu(ev->latency); 6768 timeout = le16_to_cpu(ev->timeout); 6769 6770 hcon = hci_conn_hash_lookup_handle(hdev, handle); 6771 if (!hcon || hcon->state != BT_CONNECTED) 6772 return send_conn_param_neg_reply(hdev, handle, 6773 HCI_ERROR_UNKNOWN_CONN_ID); 6774 6775 if (max > hcon->le_conn_max_interval) 6776 return send_conn_param_neg_reply(hdev, handle, 6777 HCI_ERROR_INVALID_LL_PARAMS); 6778 6779 if (hci_check_conn_params(min, max, latency, timeout)) 6780 return send_conn_param_neg_reply(hdev, handle, 6781 HCI_ERROR_INVALID_LL_PARAMS); 6782 6783 if (hcon->role == HCI_ROLE_MASTER) { 6784 struct hci_conn_params *params; 6785 u8 store_hint; 6786 6787 hci_dev_lock(hdev); 6788 6789 params = hci_conn_params_lookup(hdev, &hcon->dst, 6790 hcon->dst_type); 6791 if (params) { 6792 params->conn_min_interval = min; 6793 params->conn_max_interval = max; 6794 params->conn_latency = latency; 6795 params->supervision_timeout = timeout; 6796 store_hint = 0x01; 6797 } else { 6798 store_hint = 0x00; 6799 } 6800 6801 hci_dev_unlock(hdev); 6802 6803 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type, 6804 store_hint, min, max, latency, timeout); 6805 } 6806 6807 cp.handle = ev->handle; 6808 cp.interval_min = ev->interval_min; 6809 cp.interval_max = ev->interval_max; 6810 cp.latency = ev->latency; 6811 cp.timeout = ev->timeout; 6812 cp.min_ce_len = 0; 6813 cp.max_ce_len = 0; 6814 6815 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp); 6816 } 6817 6818 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data, 6819 struct sk_buff *skb) 6820 { 6821 struct hci_ev_le_direct_adv_report *ev = data; 6822 u64 instant = jiffies; 6823 int i; 6824 6825 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT, 6826 flex_array_size(ev, info, ev->num))) 6827 return; 6828 6829 if (!ev->num) 6830 return; 6831 6832 hci_dev_lock(hdev); 6833 6834 for (i = 0; i < ev->num; i++) { 6835 struct hci_ev_le_direct_adv_info *info = &ev->info[i]; 6836 6837 process_adv_report(hdev, info->type, &info->bdaddr, 6838 info->bdaddr_type, &info->direct_addr, 6839 info->direct_addr_type, HCI_ADV_PHY_1M, 0, 6840 info->rssi, NULL, 0, false, false, instant); 6841 } 6842 6843 hci_dev_unlock(hdev); 6844 } 6845 6846 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data, 6847 struct sk_buff *skb) 6848 { 6849 struct hci_ev_le_phy_update_complete *ev = data; 6850 struct hci_conn *conn; 6851 6852 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6853 6854 if (ev->status) 6855 return; 6856 6857 hci_dev_lock(hdev); 6858 6859 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 6860 if (!conn) 6861 goto unlock; 6862 6863 conn->le_tx_phy = ev->tx_phy; 6864 conn->le_rx_phy = ev->rx_phy; 6865 6866 unlock: 6867 hci_dev_unlock(hdev); 6868 } 6869 6870 /* Convert LE PHY to QoS PHYs */ 6871 static u8 le_phy_qos(u8 phy) 6872 { 6873 switch (phy) { 6874 case 0x01: 6875 return HCI_LE_SET_PHY_1M; 6876 case 0x02: 6877 return HCI_LE_SET_PHY_2M; 6878 case 0x03: 6879 return HCI_LE_SET_PHY_CODED; 6880 } 6881 6882 return 0; 6883 } 6884 6885 static void hci_le_cis_established_evt(struct hci_dev *hdev, void *data, 6886 struct sk_buff *skb) 6887 { 6888 struct hci_evt_le_cis_established *ev = data; 6889 struct hci_conn *conn; 6890 struct bt_iso_qos *qos; 6891 bool pending = false; 6892 u16 handle = __le16_to_cpu(ev->handle); 6893 u32 c_sdu_interval, p_sdu_interval; 6894 6895 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 6896 6897 hci_dev_lock(hdev); 6898 6899 conn = hci_conn_hash_lookup_handle(hdev, handle); 6900 if (!conn) { 6901 bt_dev_err(hdev, 6902 "Unable to find connection with handle 0x%4.4x", 6903 handle); 6904 goto unlock; 6905 } 6906 6907 if (conn->type != CIS_LINK) { 6908 bt_dev_err(hdev, 6909 "Invalid connection link type handle 0x%4.4x", 6910 handle); 6911 goto unlock; 6912 } 6913 6914 qos = &conn->iso_qos; 6915 6916 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags); 6917 6918 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G 6919 * page 3075: 6920 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) × 6921 * ISO_Interval + SDU_Interval_C_To_P 6922 * ... 6923 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) - 6924 * Transport_Latency 6925 */ 6926 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) + 6927 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) - 6928 get_unaligned_le24(ev->c_latency); 6929 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) + 6930 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) - 6931 get_unaligned_le24(ev->p_latency); 6932 6933 switch (conn->role) { 6934 case HCI_ROLE_SLAVE: 6935 qos->ucast.in.interval = c_sdu_interval; 6936 qos->ucast.out.interval = p_sdu_interval; 6937 /* Convert Transport Latency (us) to Latency (msec) */ 6938 qos->ucast.in.latency = 6939 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency), 6940 1000); 6941 qos->ucast.out.latency = 6942 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency), 6943 1000); 6944 qos->ucast.in.sdu = ev->c_bn ? le16_to_cpu(ev->c_mtu) : 0; 6945 qos->ucast.out.sdu = ev->p_bn ? le16_to_cpu(ev->p_mtu) : 0; 6946 qos->ucast.in.phys = le_phy_qos(ev->c_phy); 6947 qos->ucast.out.phys = le_phy_qos(ev->p_phy); 6948 break; 6949 case HCI_ROLE_MASTER: 6950 qos->ucast.in.interval = p_sdu_interval; 6951 qos->ucast.out.interval = c_sdu_interval; 6952 /* Convert Transport Latency (us) to Latency (msec) */ 6953 qos->ucast.out.latency = 6954 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency), 6955 1000); 6956 qos->ucast.in.latency = 6957 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency), 6958 1000); 6959 qos->ucast.out.sdu = ev->c_bn ? le16_to_cpu(ev->c_mtu) : 0; 6960 qos->ucast.in.sdu = ev->p_bn ? le16_to_cpu(ev->p_mtu) : 0; 6961 qos->ucast.out.phys = le_phy_qos(ev->c_phy); 6962 qos->ucast.in.phys = le_phy_qos(ev->p_phy); 6963 break; 6964 } 6965 6966 if (!ev->status) { 6967 conn->state = BT_CONNECTED; 6968 hci_debugfs_create_conn(conn); 6969 hci_conn_add_sysfs(conn); 6970 hci_iso_setup_path(conn); 6971 goto unlock; 6972 } 6973 6974 conn->state = BT_CLOSED; 6975 hci_connect_cfm(conn, ev->status); 6976 hci_conn_del(conn); 6977 6978 unlock: 6979 if (pending) 6980 hci_le_create_cis_pending(hdev); 6981 6982 hci_dev_unlock(hdev); 6983 } 6984 6985 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle) 6986 { 6987 struct hci_cp_le_reject_cis cp; 6988 6989 memset(&cp, 0, sizeof(cp)); 6990 cp.handle = handle; 6991 cp.reason = HCI_ERROR_REJ_BAD_ADDR; 6992 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp); 6993 } 6994 6995 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle) 6996 { 6997 struct hci_cp_le_accept_cis cp; 6998 6999 memset(&cp, 0, sizeof(cp)); 7000 cp.handle = handle; 7001 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp); 7002 } 7003 7004 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data, 7005 struct sk_buff *skb) 7006 { 7007 struct hci_evt_le_cis_req *ev = data; 7008 u16 acl_handle, cis_handle; 7009 struct hci_conn *acl, *cis; 7010 int mask; 7011 __u8 flags = 0; 7012 7013 acl_handle = __le16_to_cpu(ev->acl_handle); 7014 cis_handle = __le16_to_cpu(ev->cis_handle); 7015 7016 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x", 7017 acl_handle, cis_handle, ev->cig_id, ev->cis_id); 7018 7019 hci_dev_lock(hdev); 7020 7021 acl = hci_conn_hash_lookup_handle(hdev, acl_handle); 7022 if (!acl) 7023 goto unlock; 7024 7025 mask = hci_proto_connect_ind(hdev, &acl->dst, CIS_LINK, &flags); 7026 if (!(mask & HCI_LM_ACCEPT)) { 7027 hci_le_reject_cis(hdev, ev->cis_handle); 7028 goto unlock; 7029 } 7030 7031 cis = hci_conn_hash_lookup_handle(hdev, cis_handle); 7032 if (!cis) { 7033 cis = hci_conn_add(hdev, CIS_LINK, &acl->dst, acl->dst_type, 7034 HCI_ROLE_SLAVE, cis_handle); 7035 if (IS_ERR(cis)) { 7036 hci_le_reject_cis(hdev, ev->cis_handle); 7037 goto unlock; 7038 } 7039 } 7040 7041 cis->iso_qos.ucast.cig = ev->cig_id; 7042 cis->iso_qos.ucast.cis = ev->cis_id; 7043 7044 if (!(flags & HCI_PROTO_DEFER)) { 7045 hci_le_accept_cis(hdev, ev->cis_handle); 7046 } else { 7047 cis->state = BT_CONNECT2; 7048 hci_connect_cfm(cis, 0); 7049 } 7050 7051 unlock: 7052 hci_dev_unlock(hdev); 7053 } 7054 7055 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data) 7056 { 7057 u8 handle = PTR_UINT(data); 7058 7059 return hci_le_terminate_big_sync(hdev, handle, 7060 HCI_ERROR_LOCAL_HOST_TERM); 7061 } 7062 7063 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data, 7064 struct sk_buff *skb) 7065 { 7066 struct hci_evt_le_create_big_complete *ev = data; 7067 struct hci_conn *conn; 7068 __u8 i = 0; 7069 7070 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status); 7071 7072 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE, 7073 flex_array_size(ev, bis_handle, ev->num_bis))) 7074 return; 7075 7076 hci_dev_lock(hdev); 7077 7078 /* Connect all BISes that are bound to the BIG */ 7079 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle, 7080 BT_BOUND, 7081 HCI_ROLE_MASTER))) { 7082 if (ev->status) { 7083 hci_connect_cfm(conn, ev->status); 7084 hci_conn_del(conn); 7085 continue; 7086 } 7087 7088 if (hci_conn_set_handle(conn, 7089 __le16_to_cpu(ev->bis_handle[i++]))) 7090 continue; 7091 7092 conn->state = BT_CONNECTED; 7093 set_bit(HCI_CONN_BIG_CREATED, &conn->flags); 7094 hci_debugfs_create_conn(conn); 7095 hci_conn_add_sysfs(conn); 7096 hci_iso_setup_path(conn); 7097 } 7098 7099 if (!ev->status && !i) 7100 /* If no BISes have been connected for the BIG, 7101 * terminate. This is in case all bound connections 7102 * have been closed before the BIG creation 7103 * has completed. 7104 */ 7105 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync, 7106 UINT_PTR(ev->handle), NULL); 7107 7108 hci_dev_unlock(hdev); 7109 } 7110 7111 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data, 7112 struct sk_buff *skb) 7113 { 7114 struct hci_evt_le_big_sync_established *ev = data; 7115 struct hci_conn *bis, *conn; 7116 int i; 7117 7118 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 7119 7120 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABLISHED, 7121 flex_array_size(ev, bis, ev->num_bis))) 7122 return; 7123 7124 hci_dev_lock(hdev); 7125 7126 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle, 7127 ev->num_bis); 7128 if (!conn) { 7129 bt_dev_err(hdev, 7130 "Unable to find connection for big 0x%2.2x", 7131 ev->handle); 7132 goto unlock; 7133 } 7134 7135 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags); 7136 7137 conn->num_bis = 0; 7138 memset(conn->bis, 0, sizeof(conn->num_bis)); 7139 7140 for (i = 0; i < ev->num_bis; i++) { 7141 u16 handle = le16_to_cpu(ev->bis[i]); 7142 __le32 interval; 7143 7144 bis = hci_conn_hash_lookup_handle(hdev, handle); 7145 if (!bis) { 7146 if (handle > HCI_CONN_HANDLE_MAX) { 7147 bt_dev_dbg(hdev, "ignore too large handle %u", handle); 7148 continue; 7149 } 7150 bis = hci_conn_add(hdev, BIS_LINK, BDADDR_ANY, 0, 7151 HCI_ROLE_SLAVE, handle); 7152 if (IS_ERR(bis)) 7153 continue; 7154 } 7155 7156 if (ev->status != 0x42) 7157 /* Mark PA sync as established */ 7158 set_bit(HCI_CONN_PA_SYNC, &bis->flags); 7159 7160 bis->sync_handle = conn->sync_handle; 7161 bis->iso_qos.bcast.big = ev->handle; 7162 memset(&interval, 0, sizeof(interval)); 7163 memcpy(&interval, ev->latency, sizeof(ev->latency)); 7164 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval); 7165 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */ 7166 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100; 7167 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu); 7168 7169 if (!ev->status) { 7170 bis->state = BT_CONNECTED; 7171 set_bit(HCI_CONN_BIG_SYNC, &bis->flags); 7172 hci_debugfs_create_conn(bis); 7173 hci_conn_add_sysfs(bis); 7174 hci_iso_setup_path(bis); 7175 } 7176 } 7177 7178 /* In case BIG sync failed, notify each failed connection to 7179 * the user after all hci connections have been added 7180 */ 7181 if (ev->status) 7182 for (i = 0; i < ev->num_bis; i++) { 7183 u16 handle = le16_to_cpu(ev->bis[i]); 7184 7185 bis = hci_conn_hash_lookup_handle(hdev, handle); 7186 if (!bis) 7187 continue; 7188 7189 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags); 7190 hci_connect_cfm(bis, ev->status); 7191 } 7192 7193 unlock: 7194 hci_dev_unlock(hdev); 7195 } 7196 7197 static void hci_le_big_sync_lost_evt(struct hci_dev *hdev, void *data, 7198 struct sk_buff *skb) 7199 { 7200 struct hci_evt_le_big_sync_lost *ev = data; 7201 struct hci_conn *bis; 7202 bool mgmt_conn = false; 7203 7204 bt_dev_dbg(hdev, "big handle 0x%2.2x", ev->handle); 7205 7206 hci_dev_lock(hdev); 7207 7208 /* Delete each bis connection */ 7209 while ((bis = hci_conn_hash_lookup_big_state(hdev, ev->handle, 7210 BT_CONNECTED, 7211 HCI_ROLE_SLAVE))) { 7212 if (!mgmt_conn) { 7213 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, 7214 &bis->flags); 7215 mgmt_device_disconnected(hdev, &bis->dst, bis->type, 7216 bis->dst_type, ev->reason, 7217 mgmt_conn); 7218 } 7219 7220 clear_bit(HCI_CONN_BIG_SYNC, &bis->flags); 7221 hci_disconn_cfm(bis, ev->reason); 7222 hci_conn_del(bis); 7223 } 7224 7225 hci_dev_unlock(hdev); 7226 } 7227 7228 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data, 7229 struct sk_buff *skb) 7230 { 7231 struct hci_evt_le_big_info_adv_report *ev = data; 7232 int mask = hdev->link_mode; 7233 __u8 flags = 0; 7234 struct hci_conn *pa_sync; 7235 7236 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle)); 7237 7238 hci_dev_lock(hdev); 7239 7240 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, BIS_LINK, &flags); 7241 if (!(mask & HCI_LM_ACCEPT)) 7242 goto unlock; 7243 7244 if (!(flags & HCI_PROTO_DEFER)) 7245 goto unlock; 7246 7247 pa_sync = hci_conn_hash_lookup_pa_sync_handle 7248 (hdev, 7249 le16_to_cpu(ev->sync_handle)); 7250 7251 if (!pa_sync) 7252 goto unlock; 7253 7254 pa_sync->iso_qos.bcast.encryption = ev->encryption; 7255 7256 /* Notify iso layer */ 7257 hci_connect_cfm(pa_sync, 0); 7258 7259 unlock: 7260 hci_dev_unlock(hdev); 7261 } 7262 7263 static void hci_le_read_all_remote_features_evt(struct hci_dev *hdev, 7264 void *data, struct sk_buff *skb) 7265 { 7266 struct hci_evt_le_read_all_remote_features_complete *ev = data; 7267 struct hci_conn *conn; 7268 7269 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status); 7270 7271 hci_dev_lock(hdev); 7272 7273 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle)); 7274 if (!conn) 7275 goto unlock; 7276 7277 if (!ev->status) { 7278 memcpy(conn->le_features, ev->features, 248); 7279 7280 /* Update supported PHYs */ 7281 if (!(conn->le_features[1] & HCI_LE_PHY_2M)) { 7282 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_2M; 7283 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_2M; 7284 } 7285 7286 if (!(conn->le_features[1] & HCI_LE_PHY_CODED)) { 7287 conn->le_tx_def_phys &= ~HCI_LE_SET_PHY_CODED; 7288 conn->le_rx_def_phys &= ~HCI_LE_SET_PHY_CODED; 7289 } 7290 } 7291 7292 if (conn->state == BT_CONFIG) { 7293 __u8 status; 7294 7295 /* If the local controller supports peripheral-initiated 7296 * features exchange, but the remote controller does 7297 * not, then it is possible that the error code 0x1a 7298 * for unsupported remote feature gets returned. 7299 * 7300 * In this specific case, allow the connection to 7301 * transition into connected state and mark it as 7302 * successful. 7303 */ 7304 if (!conn->out && 7305 ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE && 7306 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) 7307 status = 0x00; 7308 else 7309 status = ev->status; 7310 7311 conn->state = BT_CONNECTED; 7312 hci_connect_cfm(conn, status); 7313 } 7314 7315 unlock: 7316 hci_dev_unlock(hdev); 7317 } 7318 7319 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \ 7320 [_op] = { \ 7321 .func = _func, \ 7322 .min_len = _min_len, \ 7323 .max_len = _max_len, \ 7324 } 7325 7326 #define HCI_LE_EV(_op, _func, _len) \ 7327 HCI_LE_EV_VL(_op, _func, _len, _len) 7328 7329 #define HCI_LE_EV_STATUS(_op, _func) \ 7330 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status)) 7331 7332 /* Entries in this table shall have their position according to the subevent 7333 * opcode they handle so the use of the macros above is recommend since it does 7334 * attempt to initialize at its proper index using Designated Initializers that 7335 * way events without a callback function can be omitted. 7336 */ 7337 static const struct hci_le_ev { 7338 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb); 7339 u16 min_len; 7340 u16 max_len; 7341 } hci_le_ev_table[U8_MAX + 1] = { 7342 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */ 7343 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt, 7344 sizeof(struct hci_ev_le_conn_complete)), 7345 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */ 7346 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt, 7347 sizeof(struct hci_ev_le_advertising_report), 7348 HCI_MAX_EVENT_SIZE), 7349 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */ 7350 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE, 7351 hci_le_conn_update_complete_evt, 7352 sizeof(struct hci_ev_le_conn_update_complete)), 7353 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */ 7354 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE, 7355 hci_le_remote_feat_complete_evt, 7356 sizeof(struct hci_ev_le_remote_feat_complete)), 7357 /* [0x05 = HCI_EV_LE_LTK_REQ] */ 7358 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt, 7359 sizeof(struct hci_ev_le_ltk_req)), 7360 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */ 7361 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ, 7362 hci_le_remote_conn_param_req_evt, 7363 sizeof(struct hci_ev_le_remote_conn_param_req)), 7364 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */ 7365 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE, 7366 hci_le_enh_conn_complete_evt, 7367 sizeof(struct hci_ev_le_enh_conn_complete)), 7368 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */ 7369 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt, 7370 sizeof(struct hci_ev_le_direct_adv_report), 7371 HCI_MAX_EVENT_SIZE), 7372 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */ 7373 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt, 7374 sizeof(struct hci_ev_le_phy_update_complete)), 7375 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */ 7376 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt, 7377 sizeof(struct hci_ev_le_ext_adv_report), 7378 HCI_MAX_EVENT_SIZE), 7379 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */ 7380 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED, 7381 hci_le_pa_sync_established_evt, 7382 sizeof(struct hci_ev_le_pa_sync_established)), 7383 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */ 7384 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT, 7385 hci_le_per_adv_report_evt, 7386 sizeof(struct hci_ev_le_per_adv_report), 7387 HCI_MAX_EVENT_SIZE), 7388 /* [0x10 = HCI_EV_LE_PA_SYNC_LOST] */ 7389 HCI_LE_EV(HCI_EV_LE_PA_SYNC_LOST, hci_le_pa_sync_lost_evt, 7390 sizeof(struct hci_ev_le_pa_sync_lost)), 7391 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */ 7392 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt, 7393 sizeof(struct hci_evt_le_ext_adv_set_term)), 7394 /* [0x18 = HCI_EVT_LE_PAST_RECEIVED] */ 7395 HCI_LE_EV(HCI_EV_LE_PAST_RECEIVED, 7396 hci_le_past_received_evt, 7397 sizeof(struct hci_ev_le_past_received)), 7398 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */ 7399 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_established_evt, 7400 sizeof(struct hci_evt_le_cis_established)), 7401 /* [0x1a = HCI_EVT_LE_CIS_REQ] */ 7402 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt, 7403 sizeof(struct hci_evt_le_cis_req)), 7404 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */ 7405 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE, 7406 hci_le_create_big_complete_evt, 7407 sizeof(struct hci_evt_le_create_big_complete), 7408 HCI_MAX_EVENT_SIZE), 7409 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABLISHED] */ 7410 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABLISHED, 7411 hci_le_big_sync_established_evt, 7412 sizeof(struct hci_evt_le_big_sync_established), 7413 HCI_MAX_EVENT_SIZE), 7414 /* [0x1e = HCI_EVT_LE_BIG_SYNC_LOST] */ 7415 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_LOST, 7416 hci_le_big_sync_lost_evt, 7417 sizeof(struct hci_evt_le_big_sync_lost), 7418 HCI_MAX_EVENT_SIZE), 7419 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */ 7420 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT, 7421 hci_le_big_info_adv_report_evt, 7422 sizeof(struct hci_evt_le_big_info_adv_report), 7423 HCI_MAX_EVENT_SIZE), 7424 /* [0x2b = HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE] */ 7425 HCI_LE_EV_VL(HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE, 7426 hci_le_read_all_remote_features_evt, 7427 sizeof(struct 7428 hci_evt_le_read_all_remote_features_complete), 7429 HCI_MAX_EVENT_SIZE), 7430 }; 7431 7432 static void hci_le_meta_evt(struct hci_dev *hdev, void *data, 7433 struct sk_buff *skb, u16 *opcode, u8 *status, 7434 hci_req_complete_t *req_complete, 7435 hci_req_complete_skb_t *req_complete_skb) 7436 { 7437 struct hci_ev_le_meta *ev = data; 7438 const struct hci_le_ev *subev; 7439 7440 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent); 7441 7442 /* Only match event if command OGF is for LE */ 7443 if (hdev->req_skb && 7444 (hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 || 7445 hci_skb_opcode(hdev->req_skb) == HCI_OP_NOP) && 7446 hci_skb_event(hdev->req_skb) == ev->subevent) { 7447 *opcode = hci_skb_opcode(hdev->req_skb); 7448 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete, 7449 req_complete_skb); 7450 } 7451 7452 subev = &hci_le_ev_table[ev->subevent]; 7453 if (!subev->func) 7454 return; 7455 7456 if (skb->len < subev->min_len) { 7457 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u", 7458 ev->subevent, skb->len, subev->min_len); 7459 return; 7460 } 7461 7462 /* Just warn if the length is over max_len size it still be 7463 * possible to partially parse the event so leave to callback to 7464 * decide if that is acceptable. 7465 */ 7466 if (skb->len > subev->max_len) 7467 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u", 7468 ev->subevent, skb->len, subev->max_len); 7469 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len); 7470 if (!data) 7471 return; 7472 7473 subev->func(hdev, data, skb); 7474 } 7475 7476 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode, 7477 u8 event, struct sk_buff *skb) 7478 { 7479 struct hci_ev_cmd_complete *ev; 7480 struct hci_event_hdr *hdr; 7481 7482 if (!skb) 7483 return false; 7484 7485 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr)); 7486 if (!hdr) 7487 return false; 7488 7489 if (event) { 7490 if (hdr->evt != event) 7491 return false; 7492 return true; 7493 } 7494 7495 /* Check if request ended in Command Status - no way to retrieve 7496 * any extra parameters in this case. 7497 */ 7498 if (hdr->evt == HCI_EV_CMD_STATUS) 7499 return false; 7500 7501 if (hdr->evt != HCI_EV_CMD_COMPLETE) { 7502 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)", 7503 hdr->evt); 7504 return false; 7505 } 7506 7507 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev)); 7508 if (!ev) 7509 return false; 7510 7511 if (opcode != __le16_to_cpu(ev->opcode)) { 7512 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode, 7513 __le16_to_cpu(ev->opcode)); 7514 return false; 7515 } 7516 7517 return true; 7518 } 7519 7520 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event, 7521 struct sk_buff *skb) 7522 { 7523 struct hci_ev_le_advertising_info *adv; 7524 struct hci_ev_le_direct_adv_info *direct_adv; 7525 struct hci_ev_le_ext_adv_info *ext_adv; 7526 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data; 7527 const struct hci_ev_conn_request *conn_request = (void *)skb->data; 7528 7529 hci_dev_lock(hdev); 7530 7531 /* If we are currently suspended and this is the first BT event seen, 7532 * save the wake reason associated with the event. 7533 */ 7534 if (!hdev->suspended || hdev->wake_reason) 7535 goto unlock; 7536 7537 /* Default to remote wake. Values for wake_reason are documented in the 7538 * Bluez mgmt api docs. 7539 */ 7540 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE; 7541 7542 /* Once configured for remote wakeup, we should only wake up for 7543 * reconnections. It's useful to see which device is waking us up so 7544 * keep track of the bdaddr of the connection event that woke us up. 7545 */ 7546 if (event == HCI_EV_CONN_REQUEST) { 7547 bacpy(&hdev->wake_addr, &conn_request->bdaddr); 7548 hdev->wake_addr_type = BDADDR_BREDR; 7549 } else if (event == HCI_EV_CONN_COMPLETE) { 7550 bacpy(&hdev->wake_addr, &conn_complete->bdaddr); 7551 hdev->wake_addr_type = BDADDR_BREDR; 7552 } else if (event == HCI_EV_LE_META) { 7553 struct hci_ev_le_meta *le_ev = (void *)skb->data; 7554 u8 subevent = le_ev->subevent; 7555 u8 *ptr = &skb->data[sizeof(*le_ev)]; 7556 u8 num_reports = *ptr; 7557 7558 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT || 7559 subevent == HCI_EV_LE_DIRECT_ADV_REPORT || 7560 subevent == HCI_EV_LE_EXT_ADV_REPORT) && 7561 num_reports) { 7562 adv = (void *)(ptr + 1); 7563 direct_adv = (void *)(ptr + 1); 7564 ext_adv = (void *)(ptr + 1); 7565 7566 switch (subevent) { 7567 case HCI_EV_LE_ADVERTISING_REPORT: 7568 bacpy(&hdev->wake_addr, &adv->bdaddr); 7569 hdev->wake_addr_type = adv->bdaddr_type; 7570 break; 7571 case HCI_EV_LE_DIRECT_ADV_REPORT: 7572 bacpy(&hdev->wake_addr, &direct_adv->bdaddr); 7573 hdev->wake_addr_type = direct_adv->bdaddr_type; 7574 break; 7575 case HCI_EV_LE_EXT_ADV_REPORT: 7576 bacpy(&hdev->wake_addr, &ext_adv->bdaddr); 7577 hdev->wake_addr_type = ext_adv->bdaddr_type; 7578 break; 7579 } 7580 } 7581 } else { 7582 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED; 7583 } 7584 7585 unlock: 7586 hci_dev_unlock(hdev); 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 /* Store wake reason if we're suspended */ 7834 hci_store_wake_reason(hdev, event, skb); 7835 7836 bt_dev_dbg(hdev, "event 0x%2.2x", event); 7837 7838 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete, 7839 &req_complete_skb); 7840 7841 if (req_complete) { 7842 req_complete(hdev, status, opcode); 7843 } else if (req_complete_skb) { 7844 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) { 7845 kfree_skb(orig_skb); 7846 orig_skb = NULL; 7847 } 7848 req_complete_skb(hdev, status, opcode, orig_skb); 7849 } 7850 7851 done: 7852 kfree_skb(orig_skb); 7853 kfree_skb(skb); 7854 hdev->stat.evt_rx++; 7855 } 7856