1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. 4 5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License version 2 as 9 published by the Free Software Foundation; 10 11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 22 SOFTWARE IS DISCLAIMED. 23 */ 24 25 /* Bluetooth HCI connection handling. */ 26 27 #include <linux/export.h> 28 #include <linux/debugfs.h> 29 30 #include <net/bluetooth/bluetooth.h> 31 #include <net/bluetooth/hci_core.h> 32 #include <net/bluetooth/l2cap.h> 33 #include <net/bluetooth/iso.h> 34 #include <net/bluetooth/mgmt.h> 35 36 #include "hci_request.h" 37 #include "smp.h" 38 #include "a2mp.h" 39 #include "eir.h" 40 41 struct sco_param { 42 u16 pkt_type; 43 u16 max_latency; 44 u8 retrans_effort; 45 }; 46 47 struct conn_handle_t { 48 struct hci_conn *conn; 49 __u16 handle; 50 }; 51 52 static const struct sco_param esco_param_cvsd[] = { 53 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */ 54 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */ 55 { EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */ 56 { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */ 57 { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */ 58 }; 59 60 static const struct sco_param sco_param_cvsd[] = { 61 { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */ 62 { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */ 63 }; 64 65 static const struct sco_param esco_param_msbc[] = { 66 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */ 67 { EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */ 68 }; 69 70 /* This function requires the caller holds hdev->lock */ 71 static void hci_connect_le_scan_cleanup(struct hci_conn *conn) 72 { 73 struct hci_conn_params *params; 74 struct hci_dev *hdev = conn->hdev; 75 struct smp_irk *irk; 76 bdaddr_t *bdaddr; 77 u8 bdaddr_type; 78 79 bdaddr = &conn->dst; 80 bdaddr_type = conn->dst_type; 81 82 /* Check if we need to convert to identity address */ 83 irk = hci_get_irk(hdev, bdaddr, bdaddr_type); 84 if (irk) { 85 bdaddr = &irk->bdaddr; 86 bdaddr_type = irk->addr_type; 87 } 88 89 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr, 90 bdaddr_type); 91 if (!params || !params->explicit_connect) 92 return; 93 94 /* The connection attempt was doing scan for new RPA, and is 95 * in scan phase. If params are not associated with any other 96 * autoconnect action, remove them completely. If they are, just unmark 97 * them as waiting for connection, by clearing explicit_connect field. 98 */ 99 params->explicit_connect = false; 100 101 list_del_init(¶ms->action); 102 103 switch (params->auto_connect) { 104 case HCI_AUTO_CONN_EXPLICIT: 105 hci_conn_params_del(hdev, bdaddr, bdaddr_type); 106 /* return instead of break to avoid duplicate scan update */ 107 return; 108 case HCI_AUTO_CONN_DIRECT: 109 case HCI_AUTO_CONN_ALWAYS: 110 list_add(¶ms->action, &hdev->pend_le_conns); 111 break; 112 case HCI_AUTO_CONN_REPORT: 113 list_add(¶ms->action, &hdev->pend_le_reports); 114 break; 115 default: 116 break; 117 } 118 119 hci_update_passive_scan(hdev); 120 } 121 122 static void hci_conn_cleanup(struct hci_conn *conn) 123 { 124 struct hci_dev *hdev = conn->hdev; 125 126 if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags)) 127 hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type); 128 129 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags)) 130 hci_remove_link_key(hdev, &conn->dst); 131 132 hci_chan_list_flush(conn); 133 134 hci_conn_hash_del(hdev, conn); 135 136 if (conn->cleanup) 137 conn->cleanup(conn); 138 139 if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { 140 switch (conn->setting & SCO_AIRMODE_MASK) { 141 case SCO_AIRMODE_CVSD: 142 case SCO_AIRMODE_TRANSP: 143 if (hdev->notify) 144 hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO); 145 break; 146 } 147 } else { 148 if (hdev->notify) 149 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); 150 } 151 152 hci_conn_del_sysfs(conn); 153 154 debugfs_remove_recursive(conn->debugfs); 155 156 hci_dev_put(hdev); 157 158 hci_conn_put(conn); 159 } 160 161 static void le_scan_cleanup(struct work_struct *work) 162 { 163 struct hci_conn *conn = container_of(work, struct hci_conn, 164 le_scan_cleanup); 165 struct hci_dev *hdev = conn->hdev; 166 struct hci_conn *c = NULL; 167 168 BT_DBG("%s hcon %p", hdev->name, conn); 169 170 hci_dev_lock(hdev); 171 172 /* Check that the hci_conn is still around */ 173 rcu_read_lock(); 174 list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) { 175 if (c == conn) 176 break; 177 } 178 rcu_read_unlock(); 179 180 if (c == conn) { 181 hci_connect_le_scan_cleanup(conn); 182 hci_conn_cleanup(conn); 183 } 184 185 hci_dev_unlock(hdev); 186 hci_dev_put(hdev); 187 hci_conn_put(conn); 188 } 189 190 static void hci_connect_le_scan_remove(struct hci_conn *conn) 191 { 192 BT_DBG("%s hcon %p", conn->hdev->name, conn); 193 194 /* We can't call hci_conn_del/hci_conn_cleanup here since that 195 * could deadlock with another hci_conn_del() call that's holding 196 * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work). 197 * Instead, grab temporary extra references to the hci_dev and 198 * hci_conn and perform the necessary cleanup in a separate work 199 * callback. 200 */ 201 202 hci_dev_hold(conn->hdev); 203 hci_conn_get(conn); 204 205 /* Even though we hold a reference to the hdev, many other 206 * things might get cleaned up meanwhile, including the hdev's 207 * own workqueue, so we can't use that for scheduling. 208 */ 209 schedule_work(&conn->le_scan_cleanup); 210 } 211 212 static void hci_acl_create_connection(struct hci_conn *conn) 213 { 214 struct hci_dev *hdev = conn->hdev; 215 struct inquiry_entry *ie; 216 struct hci_cp_create_conn cp; 217 218 BT_DBG("hcon %p", conn); 219 220 /* Many controllers disallow HCI Create Connection while it is doing 221 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create 222 * Connection. This may cause the MGMT discovering state to become false 223 * without user space's request but it is okay since the MGMT Discovery 224 * APIs do not promise that discovery should be done forever. Instead, 225 * the user space monitors the status of MGMT discovering and it may 226 * request for discovery again when this flag becomes false. 227 */ 228 if (test_bit(HCI_INQUIRY, &hdev->flags)) { 229 /* Put this connection to "pending" state so that it will be 230 * executed after the inquiry cancel command complete event. 231 */ 232 conn->state = BT_CONNECT2; 233 hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL); 234 return; 235 } 236 237 conn->state = BT_CONNECT; 238 conn->out = true; 239 conn->role = HCI_ROLE_MASTER; 240 241 conn->attempt++; 242 243 conn->link_policy = hdev->link_policy; 244 245 memset(&cp, 0, sizeof(cp)); 246 bacpy(&cp.bdaddr, &conn->dst); 247 cp.pscan_rep_mode = 0x02; 248 249 ie = hci_inquiry_cache_lookup(hdev, &conn->dst); 250 if (ie) { 251 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { 252 cp.pscan_rep_mode = ie->data.pscan_rep_mode; 253 cp.pscan_mode = ie->data.pscan_mode; 254 cp.clock_offset = ie->data.clock_offset | 255 cpu_to_le16(0x8000); 256 } 257 258 memcpy(conn->dev_class, ie->data.dev_class, 3); 259 } 260 261 cp.pkt_type = cpu_to_le16(conn->pkt_type); 262 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) 263 cp.role_switch = 0x01; 264 else 265 cp.role_switch = 0x00; 266 267 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); 268 } 269 270 int hci_disconnect(struct hci_conn *conn, __u8 reason) 271 { 272 BT_DBG("hcon %p", conn); 273 274 /* When we are central of an established connection and it enters 275 * the disconnect timeout, then go ahead and try to read the 276 * current clock offset. Processing of the result is done 277 * within the event handling and hci_clock_offset_evt function. 278 */ 279 if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER && 280 (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) { 281 struct hci_dev *hdev = conn->hdev; 282 struct hci_cp_read_clock_offset clkoff_cp; 283 284 clkoff_cp.handle = cpu_to_le16(conn->handle); 285 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp), 286 &clkoff_cp); 287 } 288 289 return hci_abort_conn(conn, reason); 290 } 291 292 static void hci_add_sco(struct hci_conn *conn, __u16 handle) 293 { 294 struct hci_dev *hdev = conn->hdev; 295 struct hci_cp_add_sco cp; 296 297 BT_DBG("hcon %p", conn); 298 299 conn->state = BT_CONNECT; 300 conn->out = true; 301 302 conn->attempt++; 303 304 cp.handle = cpu_to_le16(handle); 305 cp.pkt_type = cpu_to_le16(conn->pkt_type); 306 307 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); 308 } 309 310 static bool find_next_esco_param(struct hci_conn *conn, 311 const struct sco_param *esco_param, int size) 312 { 313 for (; conn->attempt <= size; conn->attempt++) { 314 if (lmp_esco_2m_capable(conn->link) || 315 (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3)) 316 break; 317 BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported", 318 conn, conn->attempt); 319 } 320 321 return conn->attempt <= size; 322 } 323 324 static int configure_datapath_sync(struct hci_dev *hdev, struct bt_codec *codec) 325 { 326 int err; 327 __u8 vnd_len, *vnd_data = NULL; 328 struct hci_op_configure_data_path *cmd = NULL; 329 330 err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len, 331 &vnd_data); 332 if (err < 0) 333 goto error; 334 335 cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL); 336 if (!cmd) { 337 err = -ENOMEM; 338 goto error; 339 } 340 341 err = hdev->get_data_path_id(hdev, &cmd->data_path_id); 342 if (err < 0) 343 goto error; 344 345 cmd->vnd_len = vnd_len; 346 memcpy(cmd->vnd_data, vnd_data, vnd_len); 347 348 cmd->direction = 0x00; 349 __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH, 350 sizeof(*cmd) + vnd_len, cmd, HCI_CMD_TIMEOUT); 351 352 cmd->direction = 0x01; 353 err = __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH, 354 sizeof(*cmd) + vnd_len, cmd, 355 HCI_CMD_TIMEOUT); 356 error: 357 358 kfree(cmd); 359 kfree(vnd_data); 360 return err; 361 } 362 363 static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data) 364 { 365 struct conn_handle_t *conn_handle = data; 366 struct hci_conn *conn = conn_handle->conn; 367 __u16 handle = conn_handle->handle; 368 struct hci_cp_enhanced_setup_sync_conn cp; 369 const struct sco_param *param; 370 371 kfree(conn_handle); 372 373 bt_dev_dbg(hdev, "hcon %p", conn); 374 375 /* for offload use case, codec needs to configured before opening SCO */ 376 if (conn->codec.data_path) 377 configure_datapath_sync(hdev, &conn->codec); 378 379 conn->state = BT_CONNECT; 380 conn->out = true; 381 382 conn->attempt++; 383 384 memset(&cp, 0x00, sizeof(cp)); 385 386 cp.handle = cpu_to_le16(handle); 387 388 cp.tx_bandwidth = cpu_to_le32(0x00001f40); 389 cp.rx_bandwidth = cpu_to_le32(0x00001f40); 390 391 switch (conn->codec.id) { 392 case BT_CODEC_MSBC: 393 if (!find_next_esco_param(conn, esco_param_msbc, 394 ARRAY_SIZE(esco_param_msbc))) 395 return -EINVAL; 396 397 param = &esco_param_msbc[conn->attempt - 1]; 398 cp.tx_coding_format.id = 0x05; 399 cp.rx_coding_format.id = 0x05; 400 cp.tx_codec_frame_size = __cpu_to_le16(60); 401 cp.rx_codec_frame_size = __cpu_to_le16(60); 402 cp.in_bandwidth = __cpu_to_le32(32000); 403 cp.out_bandwidth = __cpu_to_le32(32000); 404 cp.in_coding_format.id = 0x04; 405 cp.out_coding_format.id = 0x04; 406 cp.in_coded_data_size = __cpu_to_le16(16); 407 cp.out_coded_data_size = __cpu_to_le16(16); 408 cp.in_pcm_data_format = 2; 409 cp.out_pcm_data_format = 2; 410 cp.in_pcm_sample_payload_msb_pos = 0; 411 cp.out_pcm_sample_payload_msb_pos = 0; 412 cp.in_data_path = conn->codec.data_path; 413 cp.out_data_path = conn->codec.data_path; 414 cp.in_transport_unit_size = 1; 415 cp.out_transport_unit_size = 1; 416 break; 417 418 case BT_CODEC_TRANSPARENT: 419 if (!find_next_esco_param(conn, esco_param_msbc, 420 ARRAY_SIZE(esco_param_msbc))) 421 return false; 422 param = &esco_param_msbc[conn->attempt - 1]; 423 cp.tx_coding_format.id = 0x03; 424 cp.rx_coding_format.id = 0x03; 425 cp.tx_codec_frame_size = __cpu_to_le16(60); 426 cp.rx_codec_frame_size = __cpu_to_le16(60); 427 cp.in_bandwidth = __cpu_to_le32(0x1f40); 428 cp.out_bandwidth = __cpu_to_le32(0x1f40); 429 cp.in_coding_format.id = 0x03; 430 cp.out_coding_format.id = 0x03; 431 cp.in_coded_data_size = __cpu_to_le16(16); 432 cp.out_coded_data_size = __cpu_to_le16(16); 433 cp.in_pcm_data_format = 2; 434 cp.out_pcm_data_format = 2; 435 cp.in_pcm_sample_payload_msb_pos = 0; 436 cp.out_pcm_sample_payload_msb_pos = 0; 437 cp.in_data_path = conn->codec.data_path; 438 cp.out_data_path = conn->codec.data_path; 439 cp.in_transport_unit_size = 1; 440 cp.out_transport_unit_size = 1; 441 break; 442 443 case BT_CODEC_CVSD: 444 if (lmp_esco_capable(conn->link)) { 445 if (!find_next_esco_param(conn, esco_param_cvsd, 446 ARRAY_SIZE(esco_param_cvsd))) 447 return -EINVAL; 448 param = &esco_param_cvsd[conn->attempt - 1]; 449 } else { 450 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) 451 return -EINVAL; 452 param = &sco_param_cvsd[conn->attempt - 1]; 453 } 454 cp.tx_coding_format.id = 2; 455 cp.rx_coding_format.id = 2; 456 cp.tx_codec_frame_size = __cpu_to_le16(60); 457 cp.rx_codec_frame_size = __cpu_to_le16(60); 458 cp.in_bandwidth = __cpu_to_le32(16000); 459 cp.out_bandwidth = __cpu_to_le32(16000); 460 cp.in_coding_format.id = 4; 461 cp.out_coding_format.id = 4; 462 cp.in_coded_data_size = __cpu_to_le16(16); 463 cp.out_coded_data_size = __cpu_to_le16(16); 464 cp.in_pcm_data_format = 2; 465 cp.out_pcm_data_format = 2; 466 cp.in_pcm_sample_payload_msb_pos = 0; 467 cp.out_pcm_sample_payload_msb_pos = 0; 468 cp.in_data_path = conn->codec.data_path; 469 cp.out_data_path = conn->codec.data_path; 470 cp.in_transport_unit_size = 16; 471 cp.out_transport_unit_size = 16; 472 break; 473 default: 474 return -EINVAL; 475 } 476 477 cp.retrans_effort = param->retrans_effort; 478 cp.pkt_type = __cpu_to_le16(param->pkt_type); 479 cp.max_latency = __cpu_to_le16(param->max_latency); 480 481 if (hci_send_cmd(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) 482 return -EIO; 483 484 return 0; 485 } 486 487 static bool hci_setup_sync_conn(struct hci_conn *conn, __u16 handle) 488 { 489 struct hci_dev *hdev = conn->hdev; 490 struct hci_cp_setup_sync_conn cp; 491 const struct sco_param *param; 492 493 bt_dev_dbg(hdev, "hcon %p", conn); 494 495 conn->state = BT_CONNECT; 496 conn->out = true; 497 498 conn->attempt++; 499 500 cp.handle = cpu_to_le16(handle); 501 502 cp.tx_bandwidth = cpu_to_le32(0x00001f40); 503 cp.rx_bandwidth = cpu_to_le32(0x00001f40); 504 cp.voice_setting = cpu_to_le16(conn->setting); 505 506 switch (conn->setting & SCO_AIRMODE_MASK) { 507 case SCO_AIRMODE_TRANSP: 508 if (!find_next_esco_param(conn, esco_param_msbc, 509 ARRAY_SIZE(esco_param_msbc))) 510 return false; 511 param = &esco_param_msbc[conn->attempt - 1]; 512 break; 513 case SCO_AIRMODE_CVSD: 514 if (lmp_esco_capable(conn->link)) { 515 if (!find_next_esco_param(conn, esco_param_cvsd, 516 ARRAY_SIZE(esco_param_cvsd))) 517 return false; 518 param = &esco_param_cvsd[conn->attempt - 1]; 519 } else { 520 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) 521 return false; 522 param = &sco_param_cvsd[conn->attempt - 1]; 523 } 524 break; 525 default: 526 return false; 527 } 528 529 cp.retrans_effort = param->retrans_effort; 530 cp.pkt_type = __cpu_to_le16(param->pkt_type); 531 cp.max_latency = __cpu_to_le16(param->max_latency); 532 533 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) 534 return false; 535 536 return true; 537 } 538 539 bool hci_setup_sync(struct hci_conn *conn, __u16 handle) 540 { 541 int result; 542 struct conn_handle_t *conn_handle; 543 544 if (enhanced_sync_conn_capable(conn->hdev)) { 545 conn_handle = kzalloc(sizeof(*conn_handle), GFP_KERNEL); 546 547 if (!conn_handle) 548 return false; 549 550 conn_handle->conn = conn; 551 conn_handle->handle = handle; 552 result = hci_cmd_sync_queue(conn->hdev, hci_enhanced_setup_sync, 553 conn_handle, NULL); 554 if (result < 0) 555 kfree(conn_handle); 556 557 return result == 0; 558 } 559 560 return hci_setup_sync_conn(conn, handle); 561 } 562 563 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, 564 u16 to_multiplier) 565 { 566 struct hci_dev *hdev = conn->hdev; 567 struct hci_conn_params *params; 568 struct hci_cp_le_conn_update cp; 569 570 hci_dev_lock(hdev); 571 572 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); 573 if (params) { 574 params->conn_min_interval = min; 575 params->conn_max_interval = max; 576 params->conn_latency = latency; 577 params->supervision_timeout = to_multiplier; 578 } 579 580 hci_dev_unlock(hdev); 581 582 memset(&cp, 0, sizeof(cp)); 583 cp.handle = cpu_to_le16(conn->handle); 584 cp.conn_interval_min = cpu_to_le16(min); 585 cp.conn_interval_max = cpu_to_le16(max); 586 cp.conn_latency = cpu_to_le16(latency); 587 cp.supervision_timeout = cpu_to_le16(to_multiplier); 588 cp.min_ce_len = cpu_to_le16(0x0000); 589 cp.max_ce_len = cpu_to_le16(0x0000); 590 591 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); 592 593 if (params) 594 return 0x01; 595 596 return 0x00; 597 } 598 599 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, 600 __u8 ltk[16], __u8 key_size) 601 { 602 struct hci_dev *hdev = conn->hdev; 603 struct hci_cp_le_start_enc cp; 604 605 BT_DBG("hcon %p", conn); 606 607 memset(&cp, 0, sizeof(cp)); 608 609 cp.handle = cpu_to_le16(conn->handle); 610 cp.rand = rand; 611 cp.ediv = ediv; 612 memcpy(cp.ltk, ltk, key_size); 613 614 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); 615 } 616 617 /* Device _must_ be locked */ 618 void hci_sco_setup(struct hci_conn *conn, __u8 status) 619 { 620 struct hci_conn *sco = conn->link; 621 622 if (!sco) 623 return; 624 625 BT_DBG("hcon %p", conn); 626 627 if (!status) { 628 if (lmp_esco_capable(conn->hdev)) 629 hci_setup_sync(sco, conn->handle); 630 else 631 hci_add_sco(sco, conn->handle); 632 } else { 633 hci_connect_cfm(sco, status); 634 hci_conn_del(sco); 635 } 636 } 637 638 static void hci_conn_timeout(struct work_struct *work) 639 { 640 struct hci_conn *conn = container_of(work, struct hci_conn, 641 disc_work.work); 642 int refcnt = atomic_read(&conn->refcnt); 643 644 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); 645 646 WARN_ON(refcnt < 0); 647 648 /* FIXME: It was observed that in pairing failed scenario, refcnt 649 * drops below 0. Probably this is because l2cap_conn_del calls 650 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is 651 * dropped. After that loop hci_chan_del is called which also drops 652 * conn. For now make sure that ACL is alive if refcnt is higher then 0, 653 * otherwise drop it. 654 */ 655 if (refcnt > 0) 656 return; 657 658 /* LE connections in scanning state need special handling */ 659 if (conn->state == BT_CONNECT && conn->type == LE_LINK && 660 test_bit(HCI_CONN_SCANNING, &conn->flags)) { 661 hci_connect_le_scan_remove(conn); 662 return; 663 } 664 665 hci_abort_conn(conn, hci_proto_disconn_ind(conn)); 666 } 667 668 /* Enter sniff mode */ 669 static void hci_conn_idle(struct work_struct *work) 670 { 671 struct hci_conn *conn = container_of(work, struct hci_conn, 672 idle_work.work); 673 struct hci_dev *hdev = conn->hdev; 674 675 BT_DBG("hcon %p mode %d", conn, conn->mode); 676 677 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) 678 return; 679 680 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) 681 return; 682 683 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { 684 struct hci_cp_sniff_subrate cp; 685 cp.handle = cpu_to_le16(conn->handle); 686 cp.max_latency = cpu_to_le16(0); 687 cp.min_remote_timeout = cpu_to_le16(0); 688 cp.min_local_timeout = cpu_to_le16(0); 689 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); 690 } 691 692 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { 693 struct hci_cp_sniff_mode cp; 694 cp.handle = cpu_to_le16(conn->handle); 695 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); 696 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); 697 cp.attempt = cpu_to_le16(4); 698 cp.timeout = cpu_to_le16(1); 699 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); 700 } 701 } 702 703 static void hci_conn_auto_accept(struct work_struct *work) 704 { 705 struct hci_conn *conn = container_of(work, struct hci_conn, 706 auto_accept_work.work); 707 708 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), 709 &conn->dst); 710 } 711 712 static void le_disable_advertising(struct hci_dev *hdev) 713 { 714 if (ext_adv_capable(hdev)) { 715 struct hci_cp_le_set_ext_adv_enable cp; 716 717 cp.enable = 0x00; 718 cp.num_of_sets = 0x00; 719 720 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp), 721 &cp); 722 } else { 723 u8 enable = 0x00; 724 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), 725 &enable); 726 } 727 } 728 729 static void le_conn_timeout(struct work_struct *work) 730 { 731 struct hci_conn *conn = container_of(work, struct hci_conn, 732 le_conn_timeout.work); 733 struct hci_dev *hdev = conn->hdev; 734 735 BT_DBG(""); 736 737 /* We could end up here due to having done directed advertising, 738 * so clean up the state if necessary. This should however only 739 * happen with broken hardware or if low duty cycle was used 740 * (which doesn't have a timeout of its own). 741 */ 742 if (conn->role == HCI_ROLE_SLAVE) { 743 /* Disable LE Advertising */ 744 le_disable_advertising(hdev); 745 hci_dev_lock(hdev); 746 hci_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT); 747 hci_dev_unlock(hdev); 748 return; 749 } 750 751 hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM); 752 } 753 754 struct iso_list_data { 755 union { 756 u8 cig; 757 u8 big; 758 }; 759 union { 760 u8 cis; 761 u8 bis; 762 u16 sync_handle; 763 }; 764 int count; 765 struct { 766 struct hci_cp_le_set_cig_params cp; 767 struct hci_cis_params cis[0x11]; 768 } pdu; 769 }; 770 771 static void bis_list(struct hci_conn *conn, void *data) 772 { 773 struct iso_list_data *d = data; 774 775 /* Skip if not broadcast/ANY address */ 776 if (bacmp(&conn->dst, BDADDR_ANY)) 777 return; 778 779 if (d->big != conn->iso_qos.big || d->bis == BT_ISO_QOS_BIS_UNSET || 780 d->bis != conn->iso_qos.bis) 781 return; 782 783 d->count++; 784 } 785 786 static void find_bis(struct hci_conn *conn, void *data) 787 { 788 struct iso_list_data *d = data; 789 790 /* Ignore unicast */ 791 if (bacmp(&conn->dst, BDADDR_ANY)) 792 return; 793 794 d->count++; 795 } 796 797 static int terminate_big_sync(struct hci_dev *hdev, void *data) 798 { 799 struct iso_list_data *d = data; 800 801 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", d->big, d->bis); 802 803 hci_remove_ext_adv_instance_sync(hdev, d->bis, NULL); 804 805 /* Check if ISO connection is a BIS and terminate BIG if there are 806 * no other connections using it. 807 */ 808 hci_conn_hash_list_state(hdev, find_bis, ISO_LINK, BT_CONNECTED, d); 809 if (d->count) 810 return 0; 811 812 return hci_le_terminate_big_sync(hdev, d->big, 813 HCI_ERROR_LOCAL_HOST_TERM); 814 } 815 816 static void terminate_big_destroy(struct hci_dev *hdev, void *data, int err) 817 { 818 kfree(data); 819 } 820 821 static int hci_le_terminate_big(struct hci_dev *hdev, u8 big, u8 bis) 822 { 823 struct iso_list_data *d; 824 825 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", big, bis); 826 827 d = kmalloc(sizeof(*d), GFP_KERNEL); 828 if (!d) 829 return -ENOMEM; 830 831 memset(d, 0, sizeof(*d)); 832 d->big = big; 833 d->bis = bis; 834 835 return hci_cmd_sync_queue(hdev, terminate_big_sync, d, 836 terminate_big_destroy); 837 } 838 839 static int big_terminate_sync(struct hci_dev *hdev, void *data) 840 { 841 struct iso_list_data *d = data; 842 843 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", d->big, 844 d->sync_handle); 845 846 /* Check if ISO connection is a BIS and terminate BIG if there are 847 * no other connections using it. 848 */ 849 hci_conn_hash_list_state(hdev, find_bis, ISO_LINK, BT_CONNECTED, d); 850 if (d->count) 851 return 0; 852 853 hci_le_big_terminate_sync(hdev, d->big); 854 855 return hci_le_pa_terminate_sync(hdev, d->sync_handle); 856 } 857 858 static int hci_le_big_terminate(struct hci_dev *hdev, u8 big, u16 sync_handle) 859 { 860 struct iso_list_data *d; 861 862 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", big, sync_handle); 863 864 d = kmalloc(sizeof(*d), GFP_KERNEL); 865 if (!d) 866 return -ENOMEM; 867 868 memset(d, 0, sizeof(*d)); 869 d->big = big; 870 d->sync_handle = sync_handle; 871 872 return hci_cmd_sync_queue(hdev, big_terminate_sync, d, 873 terminate_big_destroy); 874 } 875 876 /* Cleanup BIS connection 877 * 878 * Detects if there any BIS left connected in a BIG 879 * broadcaster: Remove advertising instance and terminate BIG. 880 * broadcaster receiver: Teminate BIG sync and terminate PA sync. 881 */ 882 static void bis_cleanup(struct hci_conn *conn) 883 { 884 struct hci_dev *hdev = conn->hdev; 885 886 bt_dev_dbg(hdev, "conn %p", conn); 887 888 if (conn->role == HCI_ROLE_MASTER) { 889 if (!test_and_clear_bit(HCI_CONN_PER_ADV, &conn->flags)) 890 return; 891 892 hci_le_terminate_big(hdev, conn->iso_qos.big, 893 conn->iso_qos.bis); 894 } else { 895 hci_le_big_terminate(hdev, conn->iso_qos.big, 896 conn->sync_handle); 897 } 898 } 899 900 static int remove_cig_sync(struct hci_dev *hdev, void *data) 901 { 902 u8 handle = PTR_ERR(data); 903 904 return hci_le_remove_cig_sync(hdev, handle); 905 } 906 907 static int hci_le_remove_cig(struct hci_dev *hdev, u8 handle) 908 { 909 bt_dev_dbg(hdev, "handle 0x%2.2x", handle); 910 911 return hci_cmd_sync_queue(hdev, remove_cig_sync, ERR_PTR(handle), NULL); 912 } 913 914 static void find_cis(struct hci_conn *conn, void *data) 915 { 916 struct iso_list_data *d = data; 917 918 /* Ignore broadcast */ 919 if (!bacmp(&conn->dst, BDADDR_ANY)) 920 return; 921 922 d->count++; 923 } 924 925 /* Cleanup CIS connection: 926 * 927 * Detects if there any CIS left connected in a CIG and remove it. 928 */ 929 static void cis_cleanup(struct hci_conn *conn) 930 { 931 struct hci_dev *hdev = conn->hdev; 932 struct iso_list_data d; 933 934 memset(&d, 0, sizeof(d)); 935 d.cig = conn->iso_qos.cig; 936 937 /* Check if ISO connection is a CIS and remove CIG if there are 938 * no other connections using it. 939 */ 940 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECTED, &d); 941 if (d.count) 942 return; 943 944 hci_le_remove_cig(hdev, conn->iso_qos.cig); 945 } 946 947 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, 948 u8 role) 949 { 950 struct hci_conn *conn; 951 952 BT_DBG("%s dst %pMR", hdev->name, dst); 953 954 conn = kzalloc(sizeof(*conn), GFP_KERNEL); 955 if (!conn) 956 return NULL; 957 958 bacpy(&conn->dst, dst); 959 bacpy(&conn->src, &hdev->bdaddr); 960 conn->handle = HCI_CONN_HANDLE_UNSET; 961 conn->hdev = hdev; 962 conn->type = type; 963 conn->role = role; 964 conn->mode = HCI_CM_ACTIVE; 965 conn->state = BT_OPEN; 966 conn->auth_type = HCI_AT_GENERAL_BONDING; 967 conn->io_capability = hdev->io_capability; 968 conn->remote_auth = 0xff; 969 conn->key_type = 0xff; 970 conn->rssi = HCI_RSSI_INVALID; 971 conn->tx_power = HCI_TX_POWER_INVALID; 972 conn->max_tx_power = HCI_TX_POWER_INVALID; 973 974 set_bit(HCI_CONN_POWER_SAVE, &conn->flags); 975 conn->disc_timeout = HCI_DISCONN_TIMEOUT; 976 977 /* Set Default Authenticated payload timeout to 30s */ 978 conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT; 979 980 if (conn->role == HCI_ROLE_MASTER) 981 conn->out = true; 982 983 switch (type) { 984 case ACL_LINK: 985 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; 986 break; 987 case LE_LINK: 988 /* conn->src should reflect the local identity address */ 989 hci_copy_identity_address(hdev, &conn->src, &conn->src_type); 990 break; 991 case ISO_LINK: 992 /* conn->src should reflect the local identity address */ 993 hci_copy_identity_address(hdev, &conn->src, &conn->src_type); 994 995 /* set proper cleanup function */ 996 if (!bacmp(dst, BDADDR_ANY)) 997 conn->cleanup = bis_cleanup; 998 else if (conn->role == HCI_ROLE_MASTER) 999 conn->cleanup = cis_cleanup; 1000 1001 break; 1002 case SCO_LINK: 1003 if (lmp_esco_capable(hdev)) 1004 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | 1005 (hdev->esco_type & EDR_ESCO_MASK); 1006 else 1007 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; 1008 break; 1009 case ESCO_LINK: 1010 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; 1011 break; 1012 } 1013 1014 skb_queue_head_init(&conn->data_q); 1015 1016 INIT_LIST_HEAD(&conn->chan_list); 1017 1018 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); 1019 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); 1020 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); 1021 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout); 1022 INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup); 1023 1024 atomic_set(&conn->refcnt, 0); 1025 1026 hci_dev_hold(hdev); 1027 1028 hci_conn_hash_add(hdev, conn); 1029 1030 /* The SCO and eSCO connections will only be notified when their 1031 * setup has been completed. This is different to ACL links which 1032 * can be notified right away. 1033 */ 1034 if (conn->type != SCO_LINK && conn->type != ESCO_LINK) { 1035 if (hdev->notify) 1036 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); 1037 } 1038 1039 hci_conn_init_sysfs(conn); 1040 1041 return conn; 1042 } 1043 1044 int hci_conn_del(struct hci_conn *conn) 1045 { 1046 struct hci_dev *hdev = conn->hdev; 1047 1048 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); 1049 1050 cancel_delayed_work_sync(&conn->disc_work); 1051 cancel_delayed_work_sync(&conn->auto_accept_work); 1052 cancel_delayed_work_sync(&conn->idle_work); 1053 1054 if (conn->type == ACL_LINK) { 1055 struct hci_conn *sco = conn->link; 1056 if (sco) 1057 sco->link = NULL; 1058 1059 /* Unacked frames */ 1060 hdev->acl_cnt += conn->sent; 1061 } else if (conn->type == LE_LINK) { 1062 cancel_delayed_work(&conn->le_conn_timeout); 1063 1064 if (hdev->le_pkts) 1065 hdev->le_cnt += conn->sent; 1066 else 1067 hdev->acl_cnt += conn->sent; 1068 } else { 1069 struct hci_conn *acl = conn->link; 1070 if (acl) { 1071 acl->link = NULL; 1072 hci_conn_drop(acl); 1073 } 1074 } 1075 1076 if (conn->amp_mgr) 1077 amp_mgr_put(conn->amp_mgr); 1078 1079 skb_queue_purge(&conn->data_q); 1080 1081 /* Remove the connection from the list and cleanup its remaining 1082 * state. This is a separate function since for some cases like 1083 * BT_CONNECT_SCAN we *only* want the cleanup part without the 1084 * rest of hci_conn_del. 1085 */ 1086 hci_conn_cleanup(conn); 1087 1088 return 0; 1089 } 1090 1091 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type) 1092 { 1093 int use_src = bacmp(src, BDADDR_ANY); 1094 struct hci_dev *hdev = NULL, *d; 1095 1096 BT_DBG("%pMR -> %pMR", src, dst); 1097 1098 read_lock(&hci_dev_list_lock); 1099 1100 list_for_each_entry(d, &hci_dev_list, list) { 1101 if (!test_bit(HCI_UP, &d->flags) || 1102 hci_dev_test_flag(d, HCI_USER_CHANNEL) || 1103 d->dev_type != HCI_PRIMARY) 1104 continue; 1105 1106 /* Simple routing: 1107 * No source address - find interface with bdaddr != dst 1108 * Source address - find interface with bdaddr == src 1109 */ 1110 1111 if (use_src) { 1112 bdaddr_t id_addr; 1113 u8 id_addr_type; 1114 1115 if (src_type == BDADDR_BREDR) { 1116 if (!lmp_bredr_capable(d)) 1117 continue; 1118 bacpy(&id_addr, &d->bdaddr); 1119 id_addr_type = BDADDR_BREDR; 1120 } else { 1121 if (!lmp_le_capable(d)) 1122 continue; 1123 1124 hci_copy_identity_address(d, &id_addr, 1125 &id_addr_type); 1126 1127 /* Convert from HCI to three-value type */ 1128 if (id_addr_type == ADDR_LE_DEV_PUBLIC) 1129 id_addr_type = BDADDR_LE_PUBLIC; 1130 else 1131 id_addr_type = BDADDR_LE_RANDOM; 1132 } 1133 1134 if (!bacmp(&id_addr, src) && id_addr_type == src_type) { 1135 hdev = d; break; 1136 } 1137 } else { 1138 if (bacmp(&d->bdaddr, dst)) { 1139 hdev = d; break; 1140 } 1141 } 1142 } 1143 1144 if (hdev) 1145 hdev = hci_dev_hold(hdev); 1146 1147 read_unlock(&hci_dev_list_lock); 1148 return hdev; 1149 } 1150 EXPORT_SYMBOL(hci_get_route); 1151 1152 /* This function requires the caller holds hdev->lock */ 1153 static void hci_le_conn_failed(struct hci_conn *conn, u8 status) 1154 { 1155 struct hci_dev *hdev = conn->hdev; 1156 struct hci_conn_params *params; 1157 1158 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst, 1159 conn->dst_type); 1160 if (params && params->conn) { 1161 hci_conn_drop(params->conn); 1162 hci_conn_put(params->conn); 1163 params->conn = NULL; 1164 } 1165 1166 /* If the status indicates successful cancellation of 1167 * the attempt (i.e. Unknown Connection Id) there's no point of 1168 * notifying failure since we'll go back to keep trying to 1169 * connect. The only exception is explicit connect requests 1170 * where a timeout + cancel does indicate an actual failure. 1171 */ 1172 if (status != HCI_ERROR_UNKNOWN_CONN_ID || 1173 (params && params->explicit_connect)) 1174 mgmt_connect_failed(hdev, &conn->dst, conn->type, 1175 conn->dst_type, status); 1176 1177 /* Since we may have temporarily stopped the background scanning in 1178 * favor of connection establishment, we should restart it. 1179 */ 1180 hci_update_passive_scan(hdev); 1181 1182 /* Enable advertising in case this was a failed connection 1183 * attempt as a peripheral. 1184 */ 1185 hci_enable_advertising(hdev); 1186 } 1187 1188 /* This function requires the caller holds hdev->lock */ 1189 void hci_conn_failed(struct hci_conn *conn, u8 status) 1190 { 1191 struct hci_dev *hdev = conn->hdev; 1192 1193 bt_dev_dbg(hdev, "status 0x%2.2x", status); 1194 1195 switch (conn->type) { 1196 case LE_LINK: 1197 hci_le_conn_failed(conn, status); 1198 break; 1199 case ACL_LINK: 1200 mgmt_connect_failed(hdev, &conn->dst, conn->type, 1201 conn->dst_type, status); 1202 break; 1203 } 1204 1205 conn->state = BT_CLOSED; 1206 hci_connect_cfm(conn, status); 1207 hci_conn_del(conn); 1208 } 1209 1210 static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err) 1211 { 1212 struct hci_conn *conn = data; 1213 1214 hci_dev_lock(hdev); 1215 1216 if (!err) { 1217 hci_connect_le_scan_cleanup(conn); 1218 goto done; 1219 } 1220 1221 bt_dev_err(hdev, "request failed to create LE connection: err %d", err); 1222 1223 /* Check if connection is still pending */ 1224 if (conn != hci_lookup_le_connect(hdev)) 1225 goto done; 1226 1227 hci_conn_failed(conn, bt_status(err)); 1228 1229 done: 1230 hci_dev_unlock(hdev); 1231 } 1232 1233 static int hci_connect_le_sync(struct hci_dev *hdev, void *data) 1234 { 1235 struct hci_conn *conn = data; 1236 1237 bt_dev_dbg(hdev, "conn %p", conn); 1238 1239 return hci_le_create_conn_sync(hdev, conn); 1240 } 1241 1242 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, 1243 u8 dst_type, bool dst_resolved, u8 sec_level, 1244 u16 conn_timeout, u8 role) 1245 { 1246 struct hci_conn *conn; 1247 struct smp_irk *irk; 1248 int err; 1249 1250 /* Let's make sure that le is enabled.*/ 1251 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { 1252 if (lmp_le_capable(hdev)) 1253 return ERR_PTR(-ECONNREFUSED); 1254 1255 return ERR_PTR(-EOPNOTSUPP); 1256 } 1257 1258 /* Since the controller supports only one LE connection attempt at a 1259 * time, we return -EBUSY if there is any connection attempt running. 1260 */ 1261 if (hci_lookup_le_connect(hdev)) 1262 return ERR_PTR(-EBUSY); 1263 1264 /* If there's already a connection object but it's not in 1265 * scanning state it means it must already be established, in 1266 * which case we can't do anything else except report a failure 1267 * to connect. 1268 */ 1269 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type); 1270 if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) { 1271 return ERR_PTR(-EBUSY); 1272 } 1273 1274 /* Check if the destination address has been resolved by the controller 1275 * since if it did then the identity address shall be used. 1276 */ 1277 if (!dst_resolved) { 1278 /* When given an identity address with existing identity 1279 * resolving key, the connection needs to be established 1280 * to a resolvable random address. 1281 * 1282 * Storing the resolvable random address is required here 1283 * to handle connection failures. The address will later 1284 * be resolved back into the original identity address 1285 * from the connect request. 1286 */ 1287 irk = hci_find_irk_by_addr(hdev, dst, dst_type); 1288 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { 1289 dst = &irk->rpa; 1290 dst_type = ADDR_LE_DEV_RANDOM; 1291 } 1292 } 1293 1294 if (conn) { 1295 bacpy(&conn->dst, dst); 1296 } else { 1297 conn = hci_conn_add(hdev, LE_LINK, dst, role); 1298 if (!conn) 1299 return ERR_PTR(-ENOMEM); 1300 hci_conn_hold(conn); 1301 conn->pending_sec_level = sec_level; 1302 } 1303 1304 conn->dst_type = dst_type; 1305 conn->sec_level = BT_SECURITY_LOW; 1306 conn->conn_timeout = conn_timeout; 1307 1308 conn->state = BT_CONNECT; 1309 clear_bit(HCI_CONN_SCANNING, &conn->flags); 1310 1311 err = hci_cmd_sync_queue(hdev, hci_connect_le_sync, conn, 1312 create_le_conn_complete); 1313 if (err) { 1314 hci_conn_del(conn); 1315 return ERR_PTR(err); 1316 } 1317 1318 return conn; 1319 } 1320 1321 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type) 1322 { 1323 struct hci_conn *conn; 1324 1325 conn = hci_conn_hash_lookup_le(hdev, addr, type); 1326 if (!conn) 1327 return false; 1328 1329 if (conn->state != BT_CONNECTED) 1330 return false; 1331 1332 return true; 1333 } 1334 1335 /* This function requires the caller holds hdev->lock */ 1336 static int hci_explicit_conn_params_set(struct hci_dev *hdev, 1337 bdaddr_t *addr, u8 addr_type) 1338 { 1339 struct hci_conn_params *params; 1340 1341 if (is_connected(hdev, addr, addr_type)) 1342 return -EISCONN; 1343 1344 params = hci_conn_params_lookup(hdev, addr, addr_type); 1345 if (!params) { 1346 params = hci_conn_params_add(hdev, addr, addr_type); 1347 if (!params) 1348 return -ENOMEM; 1349 1350 /* If we created new params, mark them to be deleted in 1351 * hci_connect_le_scan_cleanup. It's different case than 1352 * existing disabled params, those will stay after cleanup. 1353 */ 1354 params->auto_connect = HCI_AUTO_CONN_EXPLICIT; 1355 } 1356 1357 /* We're trying to connect, so make sure params are at pend_le_conns */ 1358 if (params->auto_connect == HCI_AUTO_CONN_DISABLED || 1359 params->auto_connect == HCI_AUTO_CONN_REPORT || 1360 params->auto_connect == HCI_AUTO_CONN_EXPLICIT) { 1361 list_del_init(¶ms->action); 1362 list_add(¶ms->action, &hdev->pend_le_conns); 1363 } 1364 1365 params->explicit_connect = true; 1366 1367 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type, 1368 params->auto_connect); 1369 1370 return 0; 1371 } 1372 1373 static int qos_set_big(struct hci_dev *hdev, struct bt_iso_qos *qos) 1374 { 1375 struct iso_list_data data; 1376 1377 /* Allocate a BIG if not set */ 1378 if (qos->big == BT_ISO_QOS_BIG_UNSET) { 1379 for (data.big = 0x00; data.big < 0xef; data.big++) { 1380 data.count = 0; 1381 data.bis = 0xff; 1382 1383 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK, 1384 BT_BOUND, &data); 1385 if (!data.count) 1386 break; 1387 } 1388 1389 if (data.big == 0xef) 1390 return -EADDRNOTAVAIL; 1391 1392 /* Update BIG */ 1393 qos->big = data.big; 1394 } 1395 1396 return 0; 1397 } 1398 1399 static int qos_set_bis(struct hci_dev *hdev, struct bt_iso_qos *qos) 1400 { 1401 struct iso_list_data data; 1402 1403 /* Allocate BIS if not set */ 1404 if (qos->bis == BT_ISO_QOS_BIS_UNSET) { 1405 /* Find an unused adv set to advertise BIS, skip instance 0x00 1406 * since it is reserved as general purpose set. 1407 */ 1408 for (data.bis = 0x01; data.bis < hdev->le_num_of_adv_sets; 1409 data.bis++) { 1410 data.count = 0; 1411 1412 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK, 1413 BT_BOUND, &data); 1414 if (!data.count) 1415 break; 1416 } 1417 1418 if (data.bis == hdev->le_num_of_adv_sets) 1419 return -EADDRNOTAVAIL; 1420 1421 /* Update BIS */ 1422 qos->bis = data.bis; 1423 } 1424 1425 return 0; 1426 } 1427 1428 /* This function requires the caller holds hdev->lock */ 1429 static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst, 1430 struct bt_iso_qos *qos) 1431 { 1432 struct hci_conn *conn; 1433 struct iso_list_data data; 1434 int err; 1435 1436 /* Let's make sure that le is enabled.*/ 1437 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { 1438 if (lmp_le_capable(hdev)) 1439 return ERR_PTR(-ECONNREFUSED); 1440 return ERR_PTR(-EOPNOTSUPP); 1441 } 1442 1443 err = qos_set_big(hdev, qos); 1444 if (err) 1445 return ERR_PTR(err); 1446 1447 err = qos_set_bis(hdev, qos); 1448 if (err) 1449 return ERR_PTR(err); 1450 1451 data.big = qos->big; 1452 data.bis = qos->bis; 1453 data.count = 0; 1454 1455 /* Check if there is already a matching BIG/BIS */ 1456 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK, BT_BOUND, &data); 1457 if (data.count) 1458 return ERR_PTR(-EADDRINUSE); 1459 1460 conn = hci_conn_hash_lookup_bis(hdev, dst, qos->big, qos->bis); 1461 if (conn) 1462 return ERR_PTR(-EADDRINUSE); 1463 1464 conn = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER); 1465 if (!conn) 1466 return ERR_PTR(-ENOMEM); 1467 1468 set_bit(HCI_CONN_PER_ADV, &conn->flags); 1469 conn->state = BT_CONNECT; 1470 1471 hci_conn_hold(conn); 1472 return conn; 1473 } 1474 1475 /* This function requires the caller holds hdev->lock */ 1476 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst, 1477 u8 dst_type, u8 sec_level, 1478 u16 conn_timeout, 1479 enum conn_reasons conn_reason) 1480 { 1481 struct hci_conn *conn; 1482 1483 /* Let's make sure that le is enabled.*/ 1484 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { 1485 if (lmp_le_capable(hdev)) 1486 return ERR_PTR(-ECONNREFUSED); 1487 1488 return ERR_PTR(-EOPNOTSUPP); 1489 } 1490 1491 /* Some devices send ATT messages as soon as the physical link is 1492 * established. To be able to handle these ATT messages, the user- 1493 * space first establishes the connection and then starts the pairing 1494 * process. 1495 * 1496 * So if a hci_conn object already exists for the following connection 1497 * attempt, we simply update pending_sec_level and auth_type fields 1498 * and return the object found. 1499 */ 1500 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type); 1501 if (conn) { 1502 if (conn->pending_sec_level < sec_level) 1503 conn->pending_sec_level = sec_level; 1504 goto done; 1505 } 1506 1507 BT_DBG("requesting refresh of dst_addr"); 1508 1509 conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER); 1510 if (!conn) 1511 return ERR_PTR(-ENOMEM); 1512 1513 if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) { 1514 hci_conn_del(conn); 1515 return ERR_PTR(-EBUSY); 1516 } 1517 1518 conn->state = BT_CONNECT; 1519 set_bit(HCI_CONN_SCANNING, &conn->flags); 1520 conn->dst_type = dst_type; 1521 conn->sec_level = BT_SECURITY_LOW; 1522 conn->pending_sec_level = sec_level; 1523 conn->conn_timeout = conn_timeout; 1524 conn->conn_reason = conn_reason; 1525 1526 hci_update_passive_scan(hdev); 1527 1528 done: 1529 hci_conn_hold(conn); 1530 return conn; 1531 } 1532 1533 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, 1534 u8 sec_level, u8 auth_type, 1535 enum conn_reasons conn_reason) 1536 { 1537 struct hci_conn *acl; 1538 1539 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { 1540 if (lmp_bredr_capable(hdev)) 1541 return ERR_PTR(-ECONNREFUSED); 1542 1543 return ERR_PTR(-EOPNOTSUPP); 1544 } 1545 1546 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); 1547 if (!acl) { 1548 acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER); 1549 if (!acl) 1550 return ERR_PTR(-ENOMEM); 1551 } 1552 1553 hci_conn_hold(acl); 1554 1555 acl->conn_reason = conn_reason; 1556 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { 1557 acl->sec_level = BT_SECURITY_LOW; 1558 acl->pending_sec_level = sec_level; 1559 acl->auth_type = auth_type; 1560 hci_acl_create_connection(acl); 1561 } 1562 1563 return acl; 1564 } 1565 1566 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, 1567 __u16 setting, struct bt_codec *codec) 1568 { 1569 struct hci_conn *acl; 1570 struct hci_conn *sco; 1571 1572 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING, 1573 CONN_REASON_SCO_CONNECT); 1574 if (IS_ERR(acl)) 1575 return acl; 1576 1577 sco = hci_conn_hash_lookup_ba(hdev, type, dst); 1578 if (!sco) { 1579 sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER); 1580 if (!sco) { 1581 hci_conn_drop(acl); 1582 return ERR_PTR(-ENOMEM); 1583 } 1584 } 1585 1586 acl->link = sco; 1587 sco->link = acl; 1588 1589 hci_conn_hold(sco); 1590 1591 sco->setting = setting; 1592 sco->codec = *codec; 1593 1594 if (acl->state == BT_CONNECTED && 1595 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { 1596 set_bit(HCI_CONN_POWER_SAVE, &acl->flags); 1597 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); 1598 1599 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { 1600 /* defer SCO setup until mode change completed */ 1601 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); 1602 return sco; 1603 } 1604 1605 hci_sco_setup(acl, 0x00); 1606 } 1607 1608 return sco; 1609 } 1610 1611 static void cis_add(struct iso_list_data *d, struct bt_iso_qos *qos) 1612 { 1613 struct hci_cis_params *cis = &d->pdu.cis[d->pdu.cp.num_cis]; 1614 1615 cis->cis_id = qos->cis; 1616 cis->c_sdu = cpu_to_le16(qos->out.sdu); 1617 cis->p_sdu = cpu_to_le16(qos->in.sdu); 1618 cis->c_phy = qos->out.phy ? qos->out.phy : qos->in.phy; 1619 cis->p_phy = qos->in.phy ? qos->in.phy : qos->out.phy; 1620 cis->c_rtn = qos->out.rtn; 1621 cis->p_rtn = qos->in.rtn; 1622 1623 d->pdu.cp.num_cis++; 1624 } 1625 1626 static void cis_list(struct hci_conn *conn, void *data) 1627 { 1628 struct iso_list_data *d = data; 1629 1630 /* Skip if broadcast/ANY address */ 1631 if (!bacmp(&conn->dst, BDADDR_ANY)) 1632 return; 1633 1634 if (d->cig != conn->iso_qos.cig || d->cis == BT_ISO_QOS_CIS_UNSET || 1635 d->cis != conn->iso_qos.cis) 1636 return; 1637 1638 d->count++; 1639 1640 if (d->pdu.cp.cig_id == BT_ISO_QOS_CIG_UNSET || 1641 d->count >= ARRAY_SIZE(d->pdu.cis)) 1642 return; 1643 1644 cis_add(d, &conn->iso_qos); 1645 } 1646 1647 static int hci_le_create_big(struct hci_conn *conn, struct bt_iso_qos *qos) 1648 { 1649 struct hci_dev *hdev = conn->hdev; 1650 struct hci_cp_le_create_big cp; 1651 1652 memset(&cp, 0, sizeof(cp)); 1653 1654 cp.handle = qos->big; 1655 cp.adv_handle = qos->bis; 1656 cp.num_bis = 0x01; 1657 hci_cpu_to_le24(qos->out.interval, cp.bis.sdu_interval); 1658 cp.bis.sdu = cpu_to_le16(qos->out.sdu); 1659 cp.bis.latency = cpu_to_le16(qos->out.latency); 1660 cp.bis.rtn = qos->out.rtn; 1661 cp.bis.phy = qos->out.phy; 1662 cp.bis.packing = qos->packing; 1663 cp.bis.framing = qos->framing; 1664 cp.bis.encryption = 0x00; 1665 memset(&cp.bis.bcode, 0, sizeof(cp.bis.bcode)); 1666 1667 return hci_send_cmd(hdev, HCI_OP_LE_CREATE_BIG, sizeof(cp), &cp); 1668 } 1669 1670 static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos) 1671 { 1672 struct hci_dev *hdev = conn->hdev; 1673 struct iso_list_data data; 1674 1675 memset(&data, 0, sizeof(data)); 1676 1677 /* Allocate a CIG if not set */ 1678 if (qos->cig == BT_ISO_QOS_CIG_UNSET) { 1679 for (data.cig = 0x00; data.cig < 0xff; data.cig++) { 1680 data.count = 0; 1681 data.cis = 0xff; 1682 1683 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, 1684 BT_BOUND, &data); 1685 if (data.count) 1686 continue; 1687 1688 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, 1689 BT_CONNECTED, &data); 1690 if (!data.count) 1691 break; 1692 } 1693 1694 if (data.cig == 0xff) 1695 return false; 1696 1697 /* Update CIG */ 1698 qos->cig = data.cig; 1699 } 1700 1701 data.pdu.cp.cig_id = qos->cig; 1702 hci_cpu_to_le24(qos->out.interval, data.pdu.cp.c_interval); 1703 hci_cpu_to_le24(qos->in.interval, data.pdu.cp.p_interval); 1704 data.pdu.cp.sca = qos->sca; 1705 data.pdu.cp.packing = qos->packing; 1706 data.pdu.cp.framing = qos->framing; 1707 data.pdu.cp.c_latency = cpu_to_le16(qos->out.latency); 1708 data.pdu.cp.p_latency = cpu_to_le16(qos->in.latency); 1709 1710 if (qos->cis != BT_ISO_QOS_CIS_UNSET) { 1711 data.count = 0; 1712 data.cig = qos->cig; 1713 data.cis = qos->cis; 1714 1715 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, BT_BOUND, 1716 &data); 1717 if (data.count) 1718 return false; 1719 1720 cis_add(&data, qos); 1721 } 1722 1723 /* Reprogram all CIS(s) with the same CIG */ 1724 for (data.cig = qos->cig, data.cis = 0x00; data.cis < 0x11; 1725 data.cis++) { 1726 data.count = 0; 1727 1728 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, BT_BOUND, 1729 &data); 1730 if (data.count) 1731 continue; 1732 1733 /* Allocate a CIS if not set */ 1734 if (qos->cis == BT_ISO_QOS_CIS_UNSET) { 1735 /* Update CIS */ 1736 qos->cis = data.cis; 1737 cis_add(&data, qos); 1738 } 1739 } 1740 1741 if (qos->cis == BT_ISO_QOS_CIS_UNSET || !data.pdu.cp.num_cis) 1742 return false; 1743 1744 if (hci_send_cmd(hdev, HCI_OP_LE_SET_CIG_PARAMS, 1745 sizeof(data.pdu.cp) + 1746 (data.pdu.cp.num_cis * sizeof(*data.pdu.cis)), 1747 &data.pdu) < 0) 1748 return false; 1749 1750 return true; 1751 } 1752 1753 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst, 1754 __u8 dst_type, struct bt_iso_qos *qos) 1755 { 1756 struct hci_conn *cis; 1757 1758 cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type); 1759 if (!cis) { 1760 cis = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER); 1761 if (!cis) 1762 return ERR_PTR(-ENOMEM); 1763 cis->cleanup = cis_cleanup; 1764 } 1765 1766 if (cis->state == BT_CONNECTED) 1767 return cis; 1768 1769 /* Check if CIS has been set and the settings matches */ 1770 if (cis->state == BT_BOUND && 1771 !memcmp(&cis->iso_qos, qos, sizeof(*qos))) 1772 return cis; 1773 1774 /* Update LINK PHYs according to QoS preference */ 1775 cis->le_tx_phy = qos->out.phy; 1776 cis->le_rx_phy = qos->in.phy; 1777 1778 /* If output interval is not set use the input interval as it cannot be 1779 * 0x000000. 1780 */ 1781 if (!qos->out.interval) 1782 qos->out.interval = qos->in.interval; 1783 1784 /* If input interval is not set use the output interval as it cannot be 1785 * 0x000000. 1786 */ 1787 if (!qos->in.interval) 1788 qos->in.interval = qos->out.interval; 1789 1790 /* If output latency is not set use the input latency as it cannot be 1791 * 0x0000. 1792 */ 1793 if (!qos->out.latency) 1794 qos->out.latency = qos->in.latency; 1795 1796 /* If input latency is not set use the output latency as it cannot be 1797 * 0x0000. 1798 */ 1799 if (!qos->in.latency) 1800 qos->in.latency = qos->out.latency; 1801 1802 if (!hci_le_set_cig_params(cis, qos)) { 1803 hci_conn_drop(cis); 1804 return ERR_PTR(-EINVAL); 1805 } 1806 1807 cis->iso_qos = *qos; 1808 cis->state = BT_BOUND; 1809 1810 return cis; 1811 } 1812 1813 bool hci_iso_setup_path(struct hci_conn *conn) 1814 { 1815 struct hci_dev *hdev = conn->hdev; 1816 struct hci_cp_le_setup_iso_path cmd; 1817 1818 memset(&cmd, 0, sizeof(cmd)); 1819 1820 if (conn->iso_qos.out.sdu) { 1821 cmd.handle = cpu_to_le16(conn->handle); 1822 cmd.direction = 0x00; /* Input (Host to Controller) */ 1823 cmd.path = 0x00; /* HCI path if enabled */ 1824 cmd.codec = 0x03; /* Transparent Data */ 1825 1826 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd), 1827 &cmd) < 0) 1828 return false; 1829 } 1830 1831 if (conn->iso_qos.in.sdu) { 1832 cmd.handle = cpu_to_le16(conn->handle); 1833 cmd.direction = 0x01; /* Output (Controller to Host) */ 1834 cmd.path = 0x00; /* HCI path if enabled */ 1835 cmd.codec = 0x03; /* Transparent Data */ 1836 1837 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd), 1838 &cmd) < 0) 1839 return false; 1840 } 1841 1842 return true; 1843 } 1844 1845 static int hci_create_cis_sync(struct hci_dev *hdev, void *data) 1846 { 1847 struct { 1848 struct hci_cp_le_create_cis cp; 1849 struct hci_cis cis[0x1f]; 1850 } cmd; 1851 struct hci_conn *conn = data; 1852 u8 cig; 1853 1854 memset(&cmd, 0, sizeof(cmd)); 1855 cmd.cis[0].acl_handle = cpu_to_le16(conn->link->handle); 1856 cmd.cis[0].cis_handle = cpu_to_le16(conn->handle); 1857 cmd.cp.num_cis++; 1858 cig = conn->iso_qos.cig; 1859 1860 hci_dev_lock(hdev); 1861 1862 rcu_read_lock(); 1863 1864 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) { 1865 struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis]; 1866 1867 if (conn == data || conn->type != ISO_LINK || 1868 conn->state == BT_CONNECTED || conn->iso_qos.cig != cig) 1869 continue; 1870 1871 /* Check if all CIS(s) belonging to a CIG are ready */ 1872 if (conn->link->state != BT_CONNECTED || 1873 conn->state != BT_CONNECT) { 1874 cmd.cp.num_cis = 0; 1875 break; 1876 } 1877 1878 /* Group all CIS with state BT_CONNECT since the spec don't 1879 * allow to send them individually: 1880 * 1881 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E 1882 * page 2566: 1883 * 1884 * If the Host issues this command before all the 1885 * HCI_LE_CIS_Established events from the previous use of the 1886 * command have been generated, the Controller shall return the 1887 * error code Command Disallowed (0x0C). 1888 */ 1889 cis->acl_handle = cpu_to_le16(conn->link->handle); 1890 cis->cis_handle = cpu_to_le16(conn->handle); 1891 cmd.cp.num_cis++; 1892 } 1893 1894 rcu_read_unlock(); 1895 1896 hci_dev_unlock(hdev); 1897 1898 if (!cmd.cp.num_cis) 1899 return 0; 1900 1901 return hci_send_cmd(hdev, HCI_OP_LE_CREATE_CIS, sizeof(cmd.cp) + 1902 sizeof(cmd.cis[0]) * cmd.cp.num_cis, &cmd); 1903 } 1904 1905 int hci_le_create_cis(struct hci_conn *conn) 1906 { 1907 struct hci_conn *cis; 1908 struct hci_dev *hdev = conn->hdev; 1909 int err; 1910 1911 switch (conn->type) { 1912 case LE_LINK: 1913 if (!conn->link || conn->state != BT_CONNECTED) 1914 return -EINVAL; 1915 cis = conn->link; 1916 break; 1917 case ISO_LINK: 1918 cis = conn; 1919 break; 1920 default: 1921 return -EINVAL; 1922 } 1923 1924 if (cis->state == BT_CONNECT) 1925 return 0; 1926 1927 /* Queue Create CIS */ 1928 err = hci_cmd_sync_queue(hdev, hci_create_cis_sync, cis, NULL); 1929 if (err) 1930 return err; 1931 1932 cis->state = BT_CONNECT; 1933 1934 return 0; 1935 } 1936 1937 static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn, 1938 struct bt_iso_io_qos *qos, __u8 phy) 1939 { 1940 /* Only set MTU if PHY is enabled */ 1941 if (!qos->sdu && qos->phy) { 1942 if (hdev->iso_mtu > 0) 1943 qos->sdu = hdev->iso_mtu; 1944 else if (hdev->le_mtu > 0) 1945 qos->sdu = hdev->le_mtu; 1946 else 1947 qos->sdu = hdev->acl_mtu; 1948 } 1949 1950 /* Use the same PHY as ACL if set to any */ 1951 if (qos->phy == BT_ISO_PHY_ANY) 1952 qos->phy = phy; 1953 1954 /* Use LE ACL connection interval if not set */ 1955 if (!qos->interval) 1956 /* ACL interval unit in 1.25 ms to us */ 1957 qos->interval = conn->le_conn_interval * 1250; 1958 1959 /* Use LE ACL connection latency if not set */ 1960 if (!qos->latency) 1961 qos->latency = conn->le_conn_latency; 1962 } 1963 1964 static struct hci_conn *hci_bind_bis(struct hci_conn *conn, 1965 struct bt_iso_qos *qos) 1966 { 1967 /* Update LINK PHYs according to QoS preference */ 1968 conn->le_tx_phy = qos->out.phy; 1969 conn->le_tx_phy = qos->out.phy; 1970 conn->iso_qos = *qos; 1971 conn->state = BT_BOUND; 1972 1973 return conn; 1974 } 1975 1976 static int create_big_sync(struct hci_dev *hdev, void *data) 1977 { 1978 struct hci_conn *conn = data; 1979 struct bt_iso_qos *qos = &conn->iso_qos; 1980 u16 interval, sync_interval = 0; 1981 u32 flags = 0; 1982 int err; 1983 1984 if (qos->out.phy == 0x02) 1985 flags |= MGMT_ADV_FLAG_SEC_2M; 1986 1987 /* Align intervals */ 1988 interval = qos->out.interval / 1250; 1989 1990 if (qos->bis) 1991 sync_interval = qos->sync_interval * 1600; 1992 1993 err = hci_start_per_adv_sync(hdev, qos->bis, conn->le_per_adv_data_len, 1994 conn->le_per_adv_data, flags, interval, 1995 interval, sync_interval); 1996 if (err) 1997 return err; 1998 1999 return hci_le_create_big(conn, &conn->iso_qos); 2000 } 2001 2002 static void create_pa_complete(struct hci_dev *hdev, void *data, int err) 2003 { 2004 struct hci_cp_le_pa_create_sync *cp = data; 2005 2006 bt_dev_dbg(hdev, ""); 2007 2008 if (err) 2009 bt_dev_err(hdev, "Unable to create PA: %d", err); 2010 2011 kfree(cp); 2012 } 2013 2014 static int create_pa_sync(struct hci_dev *hdev, void *data) 2015 { 2016 struct hci_cp_le_pa_create_sync *cp = data; 2017 int err; 2018 2019 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_CREATE_SYNC, 2020 sizeof(*cp), cp, HCI_CMD_TIMEOUT); 2021 if (err) { 2022 hci_dev_clear_flag(hdev, HCI_PA_SYNC); 2023 return err; 2024 } 2025 2026 return hci_update_passive_scan_sync(hdev); 2027 } 2028 2029 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type, 2030 __u8 sid) 2031 { 2032 struct hci_cp_le_pa_create_sync *cp; 2033 2034 if (hci_dev_test_and_set_flag(hdev, HCI_PA_SYNC)) 2035 return -EBUSY; 2036 2037 cp = kmalloc(sizeof(*cp), GFP_KERNEL); 2038 if (!cp) { 2039 hci_dev_clear_flag(hdev, HCI_PA_SYNC); 2040 return -ENOMEM; 2041 } 2042 2043 /* Convert from ISO socket address type to HCI address type */ 2044 if (dst_type == BDADDR_LE_PUBLIC) 2045 dst_type = ADDR_LE_DEV_PUBLIC; 2046 else 2047 dst_type = ADDR_LE_DEV_RANDOM; 2048 2049 memset(cp, 0, sizeof(*cp)); 2050 cp->sid = sid; 2051 cp->addr_type = dst_type; 2052 bacpy(&cp->addr, dst); 2053 2054 /* Queue start pa_create_sync and scan */ 2055 return hci_cmd_sync_queue(hdev, create_pa_sync, cp, create_pa_complete); 2056 } 2057 2058 int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos, 2059 __u16 sync_handle, __u8 num_bis, __u8 bis[]) 2060 { 2061 struct _packed { 2062 struct hci_cp_le_big_create_sync cp; 2063 __u8 bis[0x11]; 2064 } pdu; 2065 int err; 2066 2067 if (num_bis > sizeof(pdu.bis)) 2068 return -EINVAL; 2069 2070 err = qos_set_big(hdev, qos); 2071 if (err) 2072 return err; 2073 2074 memset(&pdu, 0, sizeof(pdu)); 2075 pdu.cp.handle = qos->big; 2076 pdu.cp.sync_handle = cpu_to_le16(sync_handle); 2077 pdu.cp.num_bis = num_bis; 2078 memcpy(pdu.bis, bis, num_bis); 2079 2080 return hci_send_cmd(hdev, HCI_OP_LE_BIG_CREATE_SYNC, 2081 sizeof(pdu.cp) + num_bis, &pdu); 2082 } 2083 2084 static void create_big_complete(struct hci_dev *hdev, void *data, int err) 2085 { 2086 struct hci_conn *conn = data; 2087 2088 bt_dev_dbg(hdev, "conn %p", conn); 2089 2090 if (err) { 2091 bt_dev_err(hdev, "Unable to create BIG: %d", err); 2092 hci_connect_cfm(conn, err); 2093 hci_conn_del(conn); 2094 } 2095 } 2096 2097 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst, 2098 __u8 dst_type, struct bt_iso_qos *qos, 2099 __u8 base_len, __u8 *base) 2100 { 2101 struct hci_conn *conn; 2102 int err; 2103 2104 /* We need hci_conn object using the BDADDR_ANY as dst */ 2105 conn = hci_add_bis(hdev, dst, qos); 2106 if (IS_ERR(conn)) 2107 return conn; 2108 2109 conn = hci_bind_bis(conn, qos); 2110 if (!conn) { 2111 hci_conn_drop(conn); 2112 return ERR_PTR(-ENOMEM); 2113 } 2114 2115 /* Add Basic Announcement into Peridic Adv Data if BASE is set */ 2116 if (base_len && base) { 2117 base_len = eir_append_service_data(conn->le_per_adv_data, 0, 2118 0x1851, base, base_len); 2119 conn->le_per_adv_data_len = base_len; 2120 } 2121 2122 /* Queue start periodic advertising and create BIG */ 2123 err = hci_cmd_sync_queue(hdev, create_big_sync, conn, 2124 create_big_complete); 2125 if (err < 0) { 2126 hci_conn_drop(conn); 2127 return ERR_PTR(err); 2128 } 2129 2130 hci_iso_qos_setup(hdev, conn, &qos->out, 2131 conn->le_tx_phy ? conn->le_tx_phy : 2132 hdev->le_tx_def_phys); 2133 2134 return conn; 2135 } 2136 2137 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst, 2138 __u8 dst_type, struct bt_iso_qos *qos) 2139 { 2140 struct hci_conn *le; 2141 struct hci_conn *cis; 2142 2143 /* Convert from ISO socket address type to HCI address type */ 2144 if (dst_type == BDADDR_LE_PUBLIC) 2145 dst_type = ADDR_LE_DEV_PUBLIC; 2146 else 2147 dst_type = ADDR_LE_DEV_RANDOM; 2148 2149 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) 2150 le = hci_connect_le(hdev, dst, dst_type, false, 2151 BT_SECURITY_LOW, 2152 HCI_LE_CONN_TIMEOUT, 2153 HCI_ROLE_SLAVE); 2154 else 2155 le = hci_connect_le_scan(hdev, dst, dst_type, 2156 BT_SECURITY_LOW, 2157 HCI_LE_CONN_TIMEOUT, 2158 CONN_REASON_ISO_CONNECT); 2159 if (IS_ERR(le)) 2160 return le; 2161 2162 hci_iso_qos_setup(hdev, le, &qos->out, 2163 le->le_tx_phy ? le->le_tx_phy : hdev->le_tx_def_phys); 2164 hci_iso_qos_setup(hdev, le, &qos->in, 2165 le->le_rx_phy ? le->le_rx_phy : hdev->le_rx_def_phys); 2166 2167 cis = hci_bind_cis(hdev, dst, dst_type, qos); 2168 if (IS_ERR(cis)) { 2169 hci_conn_drop(le); 2170 return cis; 2171 } 2172 2173 le->link = cis; 2174 cis->link = le; 2175 2176 hci_conn_hold(cis); 2177 2178 /* If LE is already connected and CIS handle is already set proceed to 2179 * Create CIS immediately. 2180 */ 2181 if (le->state == BT_CONNECTED && cis->handle != HCI_CONN_HANDLE_UNSET) 2182 hci_le_create_cis(le); 2183 2184 return cis; 2185 } 2186 2187 /* Check link security requirement */ 2188 int hci_conn_check_link_mode(struct hci_conn *conn) 2189 { 2190 BT_DBG("hcon %p", conn); 2191 2192 /* In Secure Connections Only mode, it is required that Secure 2193 * Connections is used and the link is encrypted with AES-CCM 2194 * using a P-256 authenticated combination key. 2195 */ 2196 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) { 2197 if (!hci_conn_sc_enabled(conn) || 2198 !test_bit(HCI_CONN_AES_CCM, &conn->flags) || 2199 conn->key_type != HCI_LK_AUTH_COMBINATION_P256) 2200 return 0; 2201 } 2202 2203 /* AES encryption is required for Level 4: 2204 * 2205 * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C 2206 * page 1319: 2207 * 2208 * 128-bit equivalent strength for link and encryption keys 2209 * required using FIPS approved algorithms (E0 not allowed, 2210 * SAFER+ not allowed, and P-192 not allowed; encryption key 2211 * not shortened) 2212 */ 2213 if (conn->sec_level == BT_SECURITY_FIPS && 2214 !test_bit(HCI_CONN_AES_CCM, &conn->flags)) { 2215 bt_dev_err(conn->hdev, 2216 "Invalid security: Missing AES-CCM usage"); 2217 return 0; 2218 } 2219 2220 if (hci_conn_ssp_enabled(conn) && 2221 !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) 2222 return 0; 2223 2224 return 1; 2225 } 2226 2227 /* Authenticate remote device */ 2228 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) 2229 { 2230 BT_DBG("hcon %p", conn); 2231 2232 if (conn->pending_sec_level > sec_level) 2233 sec_level = conn->pending_sec_level; 2234 2235 if (sec_level > conn->sec_level) 2236 conn->pending_sec_level = sec_level; 2237 else if (test_bit(HCI_CONN_AUTH, &conn->flags)) 2238 return 1; 2239 2240 /* Make sure we preserve an existing MITM requirement*/ 2241 auth_type |= (conn->auth_type & 0x01); 2242 2243 conn->auth_type = auth_type; 2244 2245 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { 2246 struct hci_cp_auth_requested cp; 2247 2248 cp.handle = cpu_to_le16(conn->handle); 2249 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, 2250 sizeof(cp), &cp); 2251 2252 /* If we're already encrypted set the REAUTH_PEND flag, 2253 * otherwise set the ENCRYPT_PEND. 2254 */ 2255 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) 2256 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); 2257 else 2258 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); 2259 } 2260 2261 return 0; 2262 } 2263 2264 /* Encrypt the link */ 2265 static void hci_conn_encrypt(struct hci_conn *conn) 2266 { 2267 BT_DBG("hcon %p", conn); 2268 2269 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { 2270 struct hci_cp_set_conn_encrypt cp; 2271 cp.handle = cpu_to_le16(conn->handle); 2272 cp.encrypt = 0x01; 2273 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), 2274 &cp); 2275 } 2276 } 2277 2278 /* Enable security */ 2279 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, 2280 bool initiator) 2281 { 2282 BT_DBG("hcon %p", conn); 2283 2284 if (conn->type == LE_LINK) 2285 return smp_conn_security(conn, sec_level); 2286 2287 /* For sdp we don't need the link key. */ 2288 if (sec_level == BT_SECURITY_SDP) 2289 return 1; 2290 2291 /* For non 2.1 devices and low security level we don't need the link 2292 key. */ 2293 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) 2294 return 1; 2295 2296 /* For other security levels we need the link key. */ 2297 if (!test_bit(HCI_CONN_AUTH, &conn->flags)) 2298 goto auth; 2299 2300 /* An authenticated FIPS approved combination key has sufficient 2301 * security for security level 4. */ 2302 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && 2303 sec_level == BT_SECURITY_FIPS) 2304 goto encrypt; 2305 2306 /* An authenticated combination key has sufficient security for 2307 security level 3. */ 2308 if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || 2309 conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && 2310 sec_level == BT_SECURITY_HIGH) 2311 goto encrypt; 2312 2313 /* An unauthenticated combination key has sufficient security for 2314 security level 1 and 2. */ 2315 if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || 2316 conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && 2317 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) 2318 goto encrypt; 2319 2320 /* A combination key has always sufficient security for the security 2321 levels 1 or 2. High security level requires the combination key 2322 is generated using maximum PIN code length (16). 2323 For pre 2.1 units. */ 2324 if (conn->key_type == HCI_LK_COMBINATION && 2325 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || 2326 conn->pin_length == 16)) 2327 goto encrypt; 2328 2329 auth: 2330 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) 2331 return 0; 2332 2333 if (initiator) 2334 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags); 2335 2336 if (!hci_conn_auth(conn, sec_level, auth_type)) 2337 return 0; 2338 2339 encrypt: 2340 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) { 2341 /* Ensure that the encryption key size has been read, 2342 * otherwise stall the upper layer responses. 2343 */ 2344 if (!conn->enc_key_size) 2345 return 0; 2346 2347 /* Nothing else needed, all requirements are met */ 2348 return 1; 2349 } 2350 2351 hci_conn_encrypt(conn); 2352 return 0; 2353 } 2354 EXPORT_SYMBOL(hci_conn_security); 2355 2356 /* Check secure link requirement */ 2357 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) 2358 { 2359 BT_DBG("hcon %p", conn); 2360 2361 /* Accept if non-secure or higher security level is required */ 2362 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) 2363 return 1; 2364 2365 /* Accept if secure or higher security level is already present */ 2366 if (conn->sec_level == BT_SECURITY_HIGH || 2367 conn->sec_level == BT_SECURITY_FIPS) 2368 return 1; 2369 2370 /* Reject not secure link */ 2371 return 0; 2372 } 2373 EXPORT_SYMBOL(hci_conn_check_secure); 2374 2375 /* Switch role */ 2376 int hci_conn_switch_role(struct hci_conn *conn, __u8 role) 2377 { 2378 BT_DBG("hcon %p", conn); 2379 2380 if (role == conn->role) 2381 return 1; 2382 2383 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { 2384 struct hci_cp_switch_role cp; 2385 bacpy(&cp.bdaddr, &conn->dst); 2386 cp.role = role; 2387 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); 2388 } 2389 2390 return 0; 2391 } 2392 EXPORT_SYMBOL(hci_conn_switch_role); 2393 2394 /* Enter active mode */ 2395 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) 2396 { 2397 struct hci_dev *hdev = conn->hdev; 2398 2399 BT_DBG("hcon %p mode %d", conn, conn->mode); 2400 2401 if (conn->mode != HCI_CM_SNIFF) 2402 goto timer; 2403 2404 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) 2405 goto timer; 2406 2407 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { 2408 struct hci_cp_exit_sniff_mode cp; 2409 cp.handle = cpu_to_le16(conn->handle); 2410 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); 2411 } 2412 2413 timer: 2414 if (hdev->idle_timeout > 0) 2415 queue_delayed_work(hdev->workqueue, &conn->idle_work, 2416 msecs_to_jiffies(hdev->idle_timeout)); 2417 } 2418 2419 /* Drop all connection on the device */ 2420 void hci_conn_hash_flush(struct hci_dev *hdev) 2421 { 2422 struct hci_conn_hash *h = &hdev->conn_hash; 2423 struct hci_conn *c, *n; 2424 2425 BT_DBG("hdev %s", hdev->name); 2426 2427 list_for_each_entry_safe(c, n, &h->list, list) { 2428 c->state = BT_CLOSED; 2429 2430 hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); 2431 hci_conn_del(c); 2432 } 2433 } 2434 2435 /* Check pending connect attempts */ 2436 void hci_conn_check_pending(struct hci_dev *hdev) 2437 { 2438 struct hci_conn *conn; 2439 2440 BT_DBG("hdev %s", hdev->name); 2441 2442 hci_dev_lock(hdev); 2443 2444 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); 2445 if (conn) 2446 hci_acl_create_connection(conn); 2447 2448 hci_dev_unlock(hdev); 2449 } 2450 2451 static u32 get_link_mode(struct hci_conn *conn) 2452 { 2453 u32 link_mode = 0; 2454 2455 if (conn->role == HCI_ROLE_MASTER) 2456 link_mode |= HCI_LM_MASTER; 2457 2458 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) 2459 link_mode |= HCI_LM_ENCRYPT; 2460 2461 if (test_bit(HCI_CONN_AUTH, &conn->flags)) 2462 link_mode |= HCI_LM_AUTH; 2463 2464 if (test_bit(HCI_CONN_SECURE, &conn->flags)) 2465 link_mode |= HCI_LM_SECURE; 2466 2467 if (test_bit(HCI_CONN_FIPS, &conn->flags)) 2468 link_mode |= HCI_LM_FIPS; 2469 2470 return link_mode; 2471 } 2472 2473 int hci_get_conn_list(void __user *arg) 2474 { 2475 struct hci_conn *c; 2476 struct hci_conn_list_req req, *cl; 2477 struct hci_conn_info *ci; 2478 struct hci_dev *hdev; 2479 int n = 0, size, err; 2480 2481 if (copy_from_user(&req, arg, sizeof(req))) 2482 return -EFAULT; 2483 2484 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) 2485 return -EINVAL; 2486 2487 size = sizeof(req) + req.conn_num * sizeof(*ci); 2488 2489 cl = kmalloc(size, GFP_KERNEL); 2490 if (!cl) 2491 return -ENOMEM; 2492 2493 hdev = hci_dev_get(req.dev_id); 2494 if (!hdev) { 2495 kfree(cl); 2496 return -ENODEV; 2497 } 2498 2499 ci = cl->conn_info; 2500 2501 hci_dev_lock(hdev); 2502 list_for_each_entry(c, &hdev->conn_hash.list, list) { 2503 bacpy(&(ci + n)->bdaddr, &c->dst); 2504 (ci + n)->handle = c->handle; 2505 (ci + n)->type = c->type; 2506 (ci + n)->out = c->out; 2507 (ci + n)->state = c->state; 2508 (ci + n)->link_mode = get_link_mode(c); 2509 if (++n >= req.conn_num) 2510 break; 2511 } 2512 hci_dev_unlock(hdev); 2513 2514 cl->dev_id = hdev->id; 2515 cl->conn_num = n; 2516 size = sizeof(req) + n * sizeof(*ci); 2517 2518 hci_dev_put(hdev); 2519 2520 err = copy_to_user(arg, cl, size); 2521 kfree(cl); 2522 2523 return err ? -EFAULT : 0; 2524 } 2525 2526 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) 2527 { 2528 struct hci_conn_info_req req; 2529 struct hci_conn_info ci; 2530 struct hci_conn *conn; 2531 char __user *ptr = arg + sizeof(req); 2532 2533 if (copy_from_user(&req, arg, sizeof(req))) 2534 return -EFAULT; 2535 2536 hci_dev_lock(hdev); 2537 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); 2538 if (conn) { 2539 bacpy(&ci.bdaddr, &conn->dst); 2540 ci.handle = conn->handle; 2541 ci.type = conn->type; 2542 ci.out = conn->out; 2543 ci.state = conn->state; 2544 ci.link_mode = get_link_mode(conn); 2545 } 2546 hci_dev_unlock(hdev); 2547 2548 if (!conn) 2549 return -ENOENT; 2550 2551 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; 2552 } 2553 2554 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) 2555 { 2556 struct hci_auth_info_req req; 2557 struct hci_conn *conn; 2558 2559 if (copy_from_user(&req, arg, sizeof(req))) 2560 return -EFAULT; 2561 2562 hci_dev_lock(hdev); 2563 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); 2564 if (conn) 2565 req.type = conn->auth_type; 2566 hci_dev_unlock(hdev); 2567 2568 if (!conn) 2569 return -ENOENT; 2570 2571 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; 2572 } 2573 2574 struct hci_chan *hci_chan_create(struct hci_conn *conn) 2575 { 2576 struct hci_dev *hdev = conn->hdev; 2577 struct hci_chan *chan; 2578 2579 BT_DBG("%s hcon %p", hdev->name, conn); 2580 2581 if (test_bit(HCI_CONN_DROP, &conn->flags)) { 2582 BT_DBG("Refusing to create new hci_chan"); 2583 return NULL; 2584 } 2585 2586 chan = kzalloc(sizeof(*chan), GFP_KERNEL); 2587 if (!chan) 2588 return NULL; 2589 2590 chan->conn = hci_conn_get(conn); 2591 skb_queue_head_init(&chan->data_q); 2592 chan->state = BT_CONNECTED; 2593 2594 list_add_rcu(&chan->list, &conn->chan_list); 2595 2596 return chan; 2597 } 2598 2599 void hci_chan_del(struct hci_chan *chan) 2600 { 2601 struct hci_conn *conn = chan->conn; 2602 struct hci_dev *hdev = conn->hdev; 2603 2604 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); 2605 2606 list_del_rcu(&chan->list); 2607 2608 synchronize_rcu(); 2609 2610 /* Prevent new hci_chan's to be created for this hci_conn */ 2611 set_bit(HCI_CONN_DROP, &conn->flags); 2612 2613 hci_conn_put(conn); 2614 2615 skb_queue_purge(&chan->data_q); 2616 kfree(chan); 2617 } 2618 2619 void hci_chan_list_flush(struct hci_conn *conn) 2620 { 2621 struct hci_chan *chan, *n; 2622 2623 BT_DBG("hcon %p", conn); 2624 2625 list_for_each_entry_safe(chan, n, &conn->chan_list, list) 2626 hci_chan_del(chan); 2627 } 2628 2629 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, 2630 __u16 handle) 2631 { 2632 struct hci_chan *hchan; 2633 2634 list_for_each_entry(hchan, &hcon->chan_list, list) { 2635 if (hchan->handle == handle) 2636 return hchan; 2637 } 2638 2639 return NULL; 2640 } 2641 2642 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) 2643 { 2644 struct hci_conn_hash *h = &hdev->conn_hash; 2645 struct hci_conn *hcon; 2646 struct hci_chan *hchan = NULL; 2647 2648 rcu_read_lock(); 2649 2650 list_for_each_entry_rcu(hcon, &h->list, list) { 2651 hchan = __hci_chan_lookup_handle(hcon, handle); 2652 if (hchan) 2653 break; 2654 } 2655 2656 rcu_read_unlock(); 2657 2658 return hchan; 2659 } 2660 2661 u32 hci_conn_get_phy(struct hci_conn *conn) 2662 { 2663 u32 phys = 0; 2664 2665 /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471: 2666 * Table 6.2: Packets defined for synchronous, asynchronous, and 2667 * CPB logical transport types. 2668 */ 2669 switch (conn->type) { 2670 case SCO_LINK: 2671 /* SCO logical transport (1 Mb/s): 2672 * HV1, HV2, HV3 and DV. 2673 */ 2674 phys |= BT_PHY_BR_1M_1SLOT; 2675 2676 break; 2677 2678 case ACL_LINK: 2679 /* ACL logical transport (1 Mb/s) ptt=0: 2680 * DH1, DM3, DH3, DM5 and DH5. 2681 */ 2682 phys |= BT_PHY_BR_1M_1SLOT; 2683 2684 if (conn->pkt_type & (HCI_DM3 | HCI_DH3)) 2685 phys |= BT_PHY_BR_1M_3SLOT; 2686 2687 if (conn->pkt_type & (HCI_DM5 | HCI_DH5)) 2688 phys |= BT_PHY_BR_1M_5SLOT; 2689 2690 /* ACL logical transport (2 Mb/s) ptt=1: 2691 * 2-DH1, 2-DH3 and 2-DH5. 2692 */ 2693 if (!(conn->pkt_type & HCI_2DH1)) 2694 phys |= BT_PHY_EDR_2M_1SLOT; 2695 2696 if (!(conn->pkt_type & HCI_2DH3)) 2697 phys |= BT_PHY_EDR_2M_3SLOT; 2698 2699 if (!(conn->pkt_type & HCI_2DH5)) 2700 phys |= BT_PHY_EDR_2M_5SLOT; 2701 2702 /* ACL logical transport (3 Mb/s) ptt=1: 2703 * 3-DH1, 3-DH3 and 3-DH5. 2704 */ 2705 if (!(conn->pkt_type & HCI_3DH1)) 2706 phys |= BT_PHY_EDR_3M_1SLOT; 2707 2708 if (!(conn->pkt_type & HCI_3DH3)) 2709 phys |= BT_PHY_EDR_3M_3SLOT; 2710 2711 if (!(conn->pkt_type & HCI_3DH5)) 2712 phys |= BT_PHY_EDR_3M_5SLOT; 2713 2714 break; 2715 2716 case ESCO_LINK: 2717 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */ 2718 phys |= BT_PHY_BR_1M_1SLOT; 2719 2720 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5))) 2721 phys |= BT_PHY_BR_1M_3SLOT; 2722 2723 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */ 2724 if (!(conn->pkt_type & ESCO_2EV3)) 2725 phys |= BT_PHY_EDR_2M_1SLOT; 2726 2727 if (!(conn->pkt_type & ESCO_2EV5)) 2728 phys |= BT_PHY_EDR_2M_3SLOT; 2729 2730 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */ 2731 if (!(conn->pkt_type & ESCO_3EV3)) 2732 phys |= BT_PHY_EDR_3M_1SLOT; 2733 2734 if (!(conn->pkt_type & ESCO_3EV5)) 2735 phys |= BT_PHY_EDR_3M_3SLOT; 2736 2737 break; 2738 2739 case LE_LINK: 2740 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M) 2741 phys |= BT_PHY_LE_1M_TX; 2742 2743 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M) 2744 phys |= BT_PHY_LE_1M_RX; 2745 2746 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M) 2747 phys |= BT_PHY_LE_2M_TX; 2748 2749 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M) 2750 phys |= BT_PHY_LE_2M_RX; 2751 2752 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED) 2753 phys |= BT_PHY_LE_CODED_TX; 2754 2755 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED) 2756 phys |= BT_PHY_LE_CODED_RX; 2757 2758 break; 2759 } 2760 2761 return phys; 2762 } 2763 2764 int hci_abort_conn(struct hci_conn *conn, u8 reason) 2765 { 2766 int r = 0; 2767 2768 switch (conn->state) { 2769 case BT_CONNECTED: 2770 case BT_CONFIG: 2771 if (conn->type == AMP_LINK) { 2772 struct hci_cp_disconn_phy_link cp; 2773 2774 cp.phy_handle = HCI_PHY_HANDLE(conn->handle); 2775 cp.reason = reason; 2776 r = hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, 2777 sizeof(cp), &cp); 2778 } else { 2779 struct hci_cp_disconnect dc; 2780 2781 dc.handle = cpu_to_le16(conn->handle); 2782 dc.reason = reason; 2783 r = hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, 2784 sizeof(dc), &dc); 2785 } 2786 2787 conn->state = BT_DISCONN; 2788 2789 break; 2790 case BT_CONNECT: 2791 if (conn->type == LE_LINK) { 2792 if (test_bit(HCI_CONN_SCANNING, &conn->flags)) 2793 break; 2794 r = hci_send_cmd(conn->hdev, 2795 HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); 2796 } else if (conn->type == ACL_LINK) { 2797 if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) 2798 break; 2799 r = hci_send_cmd(conn->hdev, 2800 HCI_OP_CREATE_CONN_CANCEL, 2801 6, &conn->dst); 2802 } 2803 break; 2804 case BT_CONNECT2: 2805 if (conn->type == ACL_LINK) { 2806 struct hci_cp_reject_conn_req rej; 2807 2808 bacpy(&rej.bdaddr, &conn->dst); 2809 rej.reason = reason; 2810 2811 r = hci_send_cmd(conn->hdev, 2812 HCI_OP_REJECT_CONN_REQ, 2813 sizeof(rej), &rej); 2814 } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { 2815 struct hci_cp_reject_sync_conn_req rej; 2816 2817 bacpy(&rej.bdaddr, &conn->dst); 2818 2819 /* SCO rejection has its own limited set of 2820 * allowed error values (0x0D-0x0F) which isn't 2821 * compatible with most values passed to this 2822 * function. To be safe hard-code one of the 2823 * values that's suitable for SCO. 2824 */ 2825 rej.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; 2826 2827 r = hci_send_cmd(conn->hdev, 2828 HCI_OP_REJECT_SYNC_CONN_REQ, 2829 sizeof(rej), &rej); 2830 } 2831 break; 2832 default: 2833 conn->state = BT_CLOSED; 2834 break; 2835 } 2836 2837 return r; 2838 } 2839