net/bluetooth/hci_conn.c

   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
  34 #include "hci_request.h"
  35 #include "smp.h"
  36 #include "a2mp.h"
  37
  38 struct sco_param {
  39         u16 pkt_type;
  40         u16 max_latency;
  41         u8  retrans_effort;
  42 };
  43
  44 static const struct sco_param esco_param_cvsd[] = {
  45         { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a,   0x01 }, /* S3 */
  46         { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007,   0x01 }, /* S2 */
  47         { EDR_ESCO_MASK | ESCO_EV3,   0x0007,   0x01 }, /* S1 */
  48         { EDR_ESCO_MASK | ESCO_HV3,   0xffff,   0x01 }, /* D1 */
  49         { EDR_ESCO_MASK | ESCO_HV1,   0xffff,   0x01 }, /* D0 */
  50 };
  51
  52 static const struct sco_param sco_param_cvsd[] = {
  53         { EDR_ESCO_MASK | ESCO_HV3,   0xffff,   0xff }, /* D1 */
  54         { EDR_ESCO_MASK | ESCO_HV1,   0xffff,   0xff }, /* D0 */
  55 };
  56
  57 static const struct sco_param esco_param_msbc[] = {
  58         { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d,   0x02 }, /* T2 */
  59         { EDR_ESCO_MASK | ESCO_EV3,   0x0008,   0x02 }, /* T1 */
  60 };
  61
  62 /* This function requires the caller holds hdev->lock */
  63 static void hci_connect_le_scan_cleanup(struct hci_conn *conn)
  64 {
  65         struct hci_conn_params *params;
  66         struct hci_dev *hdev = conn->hdev;
  67         struct smp_irk *irk;
  68         bdaddr_t *bdaddr;
  69         u8 bdaddr_type;
  70
  71         bdaddr = &conn->dst;
  72         bdaddr_type = conn->dst_type;
  73
  74         /* Check if we need to convert to identity address */
  75         irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
  76         if (irk) {
  77                 bdaddr = &irk->bdaddr;
  78                 bdaddr_type = irk->addr_type;
  79         }
  80
  81         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
  82                                            bdaddr_type);
  83         if (!params || !params->explicit_connect)
  84                 return;
  85
  86         /* The connection attempt was doing scan for new RPA, and is
  87          * in scan phase. If params are not associated with any other
  88          * autoconnect action, remove them completely. If they are, just unmark
  89          * them as waiting for connection, by clearing explicit_connect field.
  90          */
  91         params->explicit_connect = false;
  92
  93         list_del_init(&params->action);
  94
  95         switch (params->auto_connect) {
  96         case HCI_AUTO_CONN_EXPLICIT:
  97                 hci_conn_params_del(hdev, bdaddr, bdaddr_type);
  98                 /* return instead of break to avoid duplicate scan update */
  99                 return;
 100         case HCI_AUTO_CONN_DIRECT:
 101         case HCI_AUTO_CONN_ALWAYS:
 102                 list_add(&params->action, &hdev->pend_le_conns);
 103                 break;
 104         case HCI_AUTO_CONN_REPORT:
 105                 list_add(&params->action, &hdev->pend_le_reports);
 106                 break;
 107         default:
 108                 break;
 109         }
 110
 111         hci_update_background_scan(hdev);
 112 }
 113
 114 static void hci_conn_cleanup(struct hci_conn *conn)
 115 {
 116         struct hci_dev *hdev = conn->hdev;
 117
 118         if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
 119                 hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
 120
 121         hci_chan_list_flush(conn);
 122
 123         hci_conn_hash_del(hdev, conn);
 124
 125         if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
 126                 switch (conn->setting & SCO_AIRMODE_MASK) {
 127                 case SCO_AIRMODE_CVSD:
 128                 case SCO_AIRMODE_TRANSP:
 129                         if (hdev->notify)
 130                                 hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
 131                         break;
 132                 }
 133         } else {
 134                 if (hdev->notify)
 135                         hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
 136         }
 137
 138         hci_conn_del_sysfs(conn);
 139
 140         debugfs_remove_recursive(conn->debugfs);
 141
 142         hci_dev_put(hdev);
 143
 144         hci_conn_put(conn);
 145 }
 146
 147 static void le_scan_cleanup(struct work_struct *work)
 148 {
 149         struct hci_conn *conn = container_of(work, struct hci_conn,
 150                                              le_scan_cleanup);
 151         struct hci_dev *hdev = conn->hdev;
 152         struct hci_conn *c = NULL;
 153
 154         BT_DBG("%s hcon %p", hdev->name, conn);
 155
 156         hci_dev_lock(hdev);
 157
 158         /* Check that the hci_conn is still around */
 159         rcu_read_lock();
 160         list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
 161                 if (c == conn)
 162                         break;
 163         }
 164         rcu_read_unlock();
 165
 166         if (c == conn) {
 167                 hci_connect_le_scan_cleanup(conn);
 168                 hci_conn_cleanup(conn);
 169         }
 170
 171         hci_dev_unlock(hdev);
 172         hci_dev_put(hdev);
 173         hci_conn_put(conn);
 174 }
 175
 176 static void hci_connect_le_scan_remove(struct hci_conn *conn)
 177 {
 178         BT_DBG("%s hcon %p", conn->hdev->name, conn);
 179
 180         /* We can't call hci_conn_del/hci_conn_cleanup here since that
 181          * could deadlock with another hci_conn_del() call that's holding
 182          * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
 183          * Instead, grab temporary extra references to the hci_dev and
 184          * hci_conn and perform the necessary cleanup in a separate work
 185          * callback.
 186          */
 187
 188         hci_dev_hold(conn->hdev);
 189         hci_conn_get(conn);
 190
 191         /* Even though we hold a reference to the hdev, many other
 192          * things might get cleaned up meanwhile, including the hdev's
 193          * own workqueue, so we can't use that for scheduling.
 194          */
 195         schedule_work(&conn->le_scan_cleanup);
 196 }
 197
 198 static void hci_acl_create_connection(struct hci_conn *conn)
 199 {
 200         struct hci_dev *hdev = conn->hdev;
 201         struct inquiry_entry *ie;
 202         struct hci_cp_create_conn cp;
 203
 204         BT_DBG("hcon %p", conn);
 205
 206         /* Many controllers disallow HCI Create Connection while it is doing
 207          * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
 208          * Connection. This may cause the MGMT discovering state to become false
 209          * without user space's request but it is okay since the MGMT Discovery
 210          * APIs do not promise that discovery should be done forever. Instead,
 211          * the user space monitors the status of MGMT discovering and it may
 212          * request for discovery again when this flag becomes false.
 213          */
 214         if (test_bit(HCI_INQUIRY, &hdev->flags)) {
 215                 /* Put this connection to "pending" state so that it will be
 216                  * executed after the inquiry cancel command complete event.
 217                  */
 218                 conn->state = BT_CONNECT2;
 219                 hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
 220                 return;
 221         }
 222
 223         conn->state = BT_CONNECT;
 224         conn->out = true;
 225         conn->role = HCI_ROLE_MASTER;
 226
 227         conn->attempt++;
 228
 229         conn->link_policy = hdev->link_policy;
 230
 231         memset(&cp, 0, sizeof(cp));
 232         bacpy(&cp.bdaddr, &conn->dst);
 233         cp.pscan_rep_mode = 0x02;
 234
 235         ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
 236         if (ie) {
 237                 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
 238                         cp.pscan_rep_mode = ie->data.pscan_rep_mode;
 239                         cp.pscan_mode     = ie->data.pscan_mode;
 240                         cp.clock_offset   = ie->data.clock_offset |
 241                                             cpu_to_le16(0x8000);
 242                 }
 243
 244                 memcpy(conn->dev_class, ie->data.dev_class, 3);
 245         }
 246
 247         cp.pkt_type = cpu_to_le16(conn->pkt_type);
 248         if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
 249                 cp.role_switch = 0x01;
 250         else
 251                 cp.role_switch = 0x00;
 252
 253         hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
 254 }
 255
 256 int hci_disconnect(struct hci_conn *conn, __u8 reason)
 257 {
 258         BT_DBG("hcon %p", conn);
 259
 260         /* When we are master of an established connection and it enters
 261          * the disconnect timeout, then go ahead and try to read the
 262          * current clock offset.  Processing of the result is done
 263          * within the event handling and hci_clock_offset_evt function.
 264          */
 265         if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
 266             (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
 267                 struct hci_dev *hdev = conn->hdev;
 268                 struct hci_cp_read_clock_offset clkoff_cp;
 269
 270                 clkoff_cp.handle = cpu_to_le16(conn->handle);
 271                 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
 272                              &clkoff_cp);
 273         }
 274
 275         return hci_abort_conn(conn, reason);
 276 }
 277
 278 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
 279 {
 280         struct hci_dev *hdev = conn->hdev;
 281         struct hci_cp_add_sco cp;
 282
 283         BT_DBG("hcon %p", conn);
 284
 285         conn->state = BT_CONNECT;
 286         conn->out = true;
 287
 288         conn->attempt++;
 289
 290         cp.handle   = cpu_to_le16(handle);
 291         cp.pkt_type = cpu_to_le16(conn->pkt_type);
 292
 293         hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
 294 }
 295
 296 static bool find_next_esco_param(struct hci_conn *conn,
 297                                  const struct sco_param *esco_param, int size)
 298 {
 299         for (; conn->attempt <= size; conn->attempt++) {
 300                 if (lmp_esco_2m_capable(conn->link) ||
 301                     (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
 302                         break;
 303                 BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
 304                        conn, conn->attempt);
 305         }
 306
 307         return conn->attempt <= size;
 308 }
 309
 310 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
 311 {
 312         struct hci_dev *hdev = conn->hdev;
 313         struct hci_cp_setup_sync_conn cp;
 314         const struct sco_param *param;
 315
 316         BT_DBG("hcon %p", conn);
 317
 318         conn->state = BT_CONNECT;
 319         conn->out = true;
 320
 321         conn->attempt++;
 322
 323         cp.handle   = cpu_to_le16(handle);
 324
 325         cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
 326         cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
 327         cp.voice_setting  = cpu_to_le16(conn->setting);
 328
 329         switch (conn->setting & SCO_AIRMODE_MASK) {
 330         case SCO_AIRMODE_TRANSP:
 331                 if (!find_next_esco_param(conn, esco_param_msbc,
 332                                           ARRAY_SIZE(esco_param_msbc)))
 333                         return false;
 334                 param = &esco_param_msbc[conn->attempt - 1];
 335                 break;
 336         case SCO_AIRMODE_CVSD:
 337                 if (lmp_esco_capable(conn->link)) {
 338                         if (!find_next_esco_param(conn, esco_param_cvsd,
 339                                                   ARRAY_SIZE(esco_param_cvsd)))
 340                                 return false;
 341                         param = &esco_param_cvsd[conn->attempt - 1];
 342                 } else {
 343                         if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
 344                                 return false;
 345                         param = &sco_param_cvsd[conn->attempt - 1];
 346                 }
 347                 break;
 348         default:
 349                 return false;
 350         }
 351
 352         cp.retrans_effort = param->retrans_effort;
 353         cp.pkt_type = __cpu_to_le16(param->pkt_type);
 354         cp.max_latency = __cpu_to_le16(param->max_latency);
 355
 356         if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
 357                 return false;
 358
 359         return true;
 360 }
 361
 362 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
 363                       u16 to_multiplier)
 364 {
 365         struct hci_dev *hdev = conn->hdev;
 366         struct hci_conn_params *params;
 367         struct hci_cp_le_conn_update cp;
 368
 369         hci_dev_lock(hdev);
 370
 371         params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
 372         if (params) {
 373                 params->conn_min_interval = min;
 374                 params->conn_max_interval = max;
 375                 params->conn_latency = latency;
 376                 params->supervision_timeout = to_multiplier;
 377         }
 378
 379         hci_dev_unlock(hdev);
 380
 381         memset(&cp, 0, sizeof(cp));
 382         cp.handle               = cpu_to_le16(conn->handle);
 383         cp.conn_interval_min    = cpu_to_le16(min);
 384         cp.conn_interval_max    = cpu_to_le16(max);
 385         cp.conn_latency         = cpu_to_le16(latency);
 386         cp.supervision_timeout  = cpu_to_le16(to_multiplier);
 387         cp.min_ce_len           = cpu_to_le16(0x0000);
 388         cp.max_ce_len           = cpu_to_le16(0x0000);
 389
 390         hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
 391
 392         if (params)
 393                 return 0x01;
 394
 395         return 0x00;
 396 }
 397
 398 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
 399                       __u8 ltk[16], __u8 key_size)
 400 {
 401         struct hci_dev *hdev = conn->hdev;
 402         struct hci_cp_le_start_enc cp;
 403
 404         BT_DBG("hcon %p", conn);
 405
 406         memset(&cp, 0, sizeof(cp));
 407
 408         cp.handle = cpu_to_le16(conn->handle);
 409         cp.rand = rand;
 410         cp.ediv = ediv;
 411         memcpy(cp.ltk, ltk, key_size);
 412
 413         hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
 414 }
 415
 416 /* Device _must_ be locked */
 417 void hci_sco_setup(struct hci_conn *conn, __u8 status)
 418 {
 419         struct hci_conn *sco = conn->link;
 420
 421         if (!sco)
 422                 return;
 423
 424         BT_DBG("hcon %p", conn);
 425
 426         if (!status) {
 427                 if (lmp_esco_capable(conn->hdev))
 428                         hci_setup_sync(sco, conn->handle);
 429                 else
 430                         hci_add_sco(sco, conn->handle);
 431         } else {
 432                 hci_connect_cfm(sco, status);
 433                 hci_conn_del(sco);
 434         }
 435 }
 436
 437 static void hci_conn_timeout(struct work_struct *work)
 438 {
 439         struct hci_conn *conn = container_of(work, struct hci_conn,
 440                                              disc_work.work);
 441         int refcnt = atomic_read(&conn->refcnt);
 442
 443         BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
 444
 445         WARN_ON(refcnt < 0);
 446
 447         /* FIXME: It was observed that in pairing failed scenario, refcnt
 448          * drops below 0. Probably this is because l2cap_conn_del calls
 449          * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
 450          * dropped. After that loop hci_chan_del is called which also drops
 451          * conn. For now make sure that ACL is alive if refcnt is higher then 0,
 452          * otherwise drop it.
 453          */
 454         if (refcnt > 0)
 455                 return;
 456
 457         /* LE connections in scanning state need special handling */
 458         if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
 459             test_bit(HCI_CONN_SCANNING, &conn->flags)) {
 460                 hci_connect_le_scan_remove(conn);
 461                 return;
 462         }
 463
 464         hci_abort_conn(conn, hci_proto_disconn_ind(conn));
 465 }
 466
 467 /* Enter sniff mode */
 468 static void hci_conn_idle(struct work_struct *work)
 469 {
 470         struct hci_conn *conn = container_of(work, struct hci_conn,
 471                                              idle_work.work);
 472         struct hci_dev *hdev = conn->hdev;
 473
 474         BT_DBG("hcon %p mode %d", conn, conn->mode);
 475
 476         if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
 477                 return;
 478
 479         if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
 480                 return;
 481
 482         if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
 483                 struct hci_cp_sniff_subrate cp;
 484                 cp.handle             = cpu_to_le16(conn->handle);
 485                 cp.max_latency        = cpu_to_le16(0);
 486                 cp.min_remote_timeout = cpu_to_le16(0);
 487                 cp.min_local_timeout  = cpu_to_le16(0);
 488                 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
 489         }
 490
 491         if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
 492                 struct hci_cp_sniff_mode cp;
 493                 cp.handle       = cpu_to_le16(conn->handle);
 494                 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
 495                 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
 496                 cp.attempt      = cpu_to_le16(4);
 497                 cp.timeout      = cpu_to_le16(1);
 498                 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
 499         }
 500 }
 501
 502 static void hci_conn_auto_accept(struct work_struct *work)
 503 {
 504         struct hci_conn *conn = container_of(work, struct hci_conn,
 505                                              auto_accept_work.work);
 506
 507         hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
 508                      &conn->dst);
 509 }
 510
 511 static void le_disable_advertising(struct hci_dev *hdev)
 512 {
 513         if (ext_adv_capable(hdev)) {
 514                 struct hci_cp_le_set_ext_adv_enable cp;
 515
 516                 cp.enable = 0x00;
 517                 cp.num_of_sets = 0x00;
 518
 519                 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
 520                              &cp);
 521         } else {
 522                 u8 enable = 0x00;
 523                 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
 524                              &enable);
 525         }
 526 }
 527
 528 static void le_conn_timeout(struct work_struct *work)
 529 {
 530         struct hci_conn *conn = container_of(work, struct hci_conn,
 531                                              le_conn_timeout.work);
 532         struct hci_dev *hdev = conn->hdev;
 533
 534         BT_DBG("");
 535
 536         /* We could end up here due to having done directed advertising,
 537          * so clean up the state if necessary. This should however only
 538          * happen with broken hardware or if low duty cycle was used
 539          * (which doesn't have a timeout of its own).
 540          */
 541         if (conn->role == HCI_ROLE_SLAVE) {
 542                 /* Disable LE Advertising */
 543                 le_disable_advertising(hdev);
 544                 hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
 545                 return;
 546         }
 547
 548         hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
 549 }
 550
 551 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 552                               u8 role)
 553 {
 554         struct hci_conn *conn;
 555
 556         BT_DBG("%s dst %pMR", hdev->name, dst);
 557
 558         conn = kzalloc(sizeof(*conn), GFP_KERNEL);
 559         if (!conn)
 560                 return NULL;
 561
 562         bacpy(&conn->dst, dst);
 563         bacpy(&conn->src, &hdev->bdaddr);
 564         conn->hdev  = hdev;
 565         conn->type  = type;
 566         conn->role  = role;
 567         conn->mode  = HCI_CM_ACTIVE;
 568         conn->state = BT_OPEN;
 569         conn->auth_type = HCI_AT_GENERAL_BONDING;
 570         conn->io_capability = hdev->io_capability;
 571         conn->remote_auth = 0xff;
 572         conn->key_type = 0xff;
 573         conn->rssi = HCI_RSSI_INVALID;
 574         conn->tx_power = HCI_TX_POWER_INVALID;
 575         conn->max_tx_power = HCI_TX_POWER_INVALID;
 576
 577         set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
 578         conn->disc_timeout = HCI_DISCONN_TIMEOUT;
 579
 580         /* Set Default Authenticated payload timeout to 30s */
 581         conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
 582
 583         if (conn->role == HCI_ROLE_MASTER)
 584                 conn->out = true;
 585
 586         switch (type) {
 587         case ACL_LINK:
 588                 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
 589                 break;
 590         case LE_LINK:
 591                 /* conn->src should reflect the local identity address */
 592                 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
 593                 break;
 594         case SCO_LINK:
 595                 if (lmp_esco_capable(hdev))
 596                         conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
 597                                         (hdev->esco_type & EDR_ESCO_MASK);
 598                 else
 599                         conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
 600                 break;
 601         case ESCO_LINK:
 602                 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
 603                 break;
 604         }
 605
 606         skb_queue_head_init(&conn->data_q);
 607
 608         INIT_LIST_HEAD(&conn->chan_list);
 609
 610         INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
 611         INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
 612         INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
 613         INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
 614         INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);
 615
 616         atomic_set(&conn->refcnt, 0);
 617
 618         hci_dev_hold(hdev);
 619
 620         hci_conn_hash_add(hdev, conn);
 621
 622         /* The SCO and eSCO connections will only be notified when their
 623          * setup has been completed. This is different to ACL links which
 624          * can be notified right away.
 625          */
 626         if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
 627                 if (hdev->notify)
 628                         hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
 629         }
 630
 631         hci_conn_init_sysfs(conn);
 632
 633         return conn;
 634 }
 635
 636 int hci_conn_del(struct hci_conn *conn)
 637 {
 638         struct hci_dev *hdev = conn->hdev;
 639
 640         BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
 641
 642         cancel_delayed_work_sync(&conn->disc_work);
 643         cancel_delayed_work_sync(&conn->auto_accept_work);
 644         cancel_delayed_work_sync(&conn->idle_work);
 645
 646         if (conn->type == ACL_LINK) {
 647                 struct hci_conn *sco = conn->link;
 648                 if (sco)
 649                         sco->link = NULL;
 650
 651                 /* Unacked frames */
 652                 hdev->acl_cnt += conn->sent;
 653         } else if (conn->type == LE_LINK) {
 654                 cancel_delayed_work(&conn->le_conn_timeout);
 655
 656                 if (hdev->le_pkts)
 657                         hdev->le_cnt += conn->sent;
 658                 else
 659                         hdev->acl_cnt += conn->sent;
 660         } else {
 661                 struct hci_conn *acl = conn->link;
 662                 if (acl) {
 663                         acl->link = NULL;
 664                         hci_conn_drop(acl);
 665                 }
 666         }
 667
 668         if (conn->amp_mgr)
 669                 amp_mgr_put(conn->amp_mgr);
 670
 671         skb_queue_purge(&conn->data_q);
 672
 673         /* Remove the connection from the list and cleanup its remaining
 674          * state. This is a separate function since for some cases like
 675          * BT_CONNECT_SCAN we *only* want the cleanup part without the
 676          * rest of hci_conn_del.
 677          */
 678         hci_conn_cleanup(conn);
 679
 680         return 0;
 681 }
 682
 683 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
 684 {
 685         int use_src = bacmp(src, BDADDR_ANY);
 686         struct hci_dev *hdev = NULL, *d;
 687
 688         BT_DBG("%pMR -> %pMR", src, dst);
 689
 690         read_lock(&hci_dev_list_lock);
 691
 692         list_for_each_entry(d, &hci_dev_list, list) {
 693                 if (!test_bit(HCI_UP, &d->flags) ||
 694                     hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
 695                     d->dev_type != HCI_PRIMARY)
 696                         continue;
 697
 698                 /* Simple routing:
 699                  *   No source address - find interface with bdaddr != dst
 700                  *   Source address    - find interface with bdaddr == src
 701                  */
 702
 703                 if (use_src) {
 704                         bdaddr_t id_addr;
 705                         u8 id_addr_type;
 706
 707                         if (src_type == BDADDR_BREDR) {
 708                                 if (!lmp_bredr_capable(d))
 709                                         continue;
 710                                 bacpy(&id_addr, &d->bdaddr);
 711                                 id_addr_type = BDADDR_BREDR;
 712                         } else {
 713                                 if (!lmp_le_capable(d))
 714                                         continue;
 715
 716                                 hci_copy_identity_address(d, &id_addr,
 717                                                           &id_addr_type);
 718
 719                                 /* Convert from HCI to three-value type */
 720                                 if (id_addr_type == ADDR_LE_DEV_PUBLIC)
 721                                         id_addr_type = BDADDR_LE_PUBLIC;
 722                                 else
 723                                         id_addr_type = BDADDR_LE_RANDOM;
 724                         }
 725
 726                         if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
 727                                 hdev = d; break;
 728                         }
 729                 } else {
 730                         if (bacmp(&d->bdaddr, dst)) {
 731                                 hdev = d; break;
 732                         }
 733                 }
 734         }
 735
 736         if (hdev)
 737                 hdev = hci_dev_hold(hdev);
 738
 739         read_unlock(&hci_dev_list_lock);
 740         return hdev;
 741 }
 742 EXPORT_SYMBOL(hci_get_route);
 743
 744 /* This function requires the caller holds hdev->lock */
 745 void hci_le_conn_failed(struct hci_conn *conn, u8 status)
 746 {
 747         struct hci_dev *hdev = conn->hdev;
 748         struct hci_conn_params *params;
 749
 750         params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
 751                                            conn->dst_type);
 752         if (params && params->conn) {
 753                 hci_conn_drop(params->conn);
 754                 hci_conn_put(params->conn);
 755                 params->conn = NULL;
 756         }
 757
 758         conn->state = BT_CLOSED;
 759
 760         /* If the status indicates successful cancellation of
 761          * the attempt (i.e. Unkown Connection Id) there's no point of
 762          * notifying failure since we'll go back to keep trying to
 763          * connect. The only exception is explicit connect requests
 764          * where a timeout + cancel does indicate an actual failure.
 765          */
 766         if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
 767             (params && params->explicit_connect))
 768                 mgmt_connect_failed(hdev, &conn->dst, conn->type,
 769                                     conn->dst_type, status);
 770
 771         hci_connect_cfm(conn, status);
 772
 773         hci_conn_del(conn);
 774
 775         /* Since we may have temporarily stopped the background scanning in
 776          * favor of connection establishment, we should restart it.
 777          */
 778         hci_update_background_scan(hdev);
 779
 780         /* Re-enable advertising in case this was a failed connection
 781          * attempt as a peripheral.
 782          */
 783         hci_req_reenable_advertising(hdev);
 784 }
 785
 786 static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
 787 {
 788         struct hci_conn *conn;
 789
 790         hci_dev_lock(hdev);
 791
 792         conn = hci_lookup_le_connect(hdev);
 793
 794         if (hdev->adv_instance_cnt)
 795                 hci_req_resume_adv_instances(hdev);
 796
 797         if (!status) {
 798                 hci_connect_le_scan_cleanup(conn);
 799                 goto done;
 800         }
 801
 802         bt_dev_err(hdev, "request failed to create LE connection: "
 803                    "status 0x%2.2x", status);
 804
 805         if (!conn)
 806                 goto done;
 807
 808         hci_le_conn_failed(conn, status);
 809
 810 done:
 811         hci_dev_unlock(hdev);
 812 }
 813
 814 static bool conn_use_rpa(struct hci_conn *conn)
 815 {
 816         struct hci_dev *hdev = conn->hdev;
 817
 818         return hci_dev_test_flag(hdev, HCI_PRIVACY);
 819 }
 820
 821 static void set_ext_conn_params(struct hci_conn *conn,
 822                                 struct hci_cp_le_ext_conn_param *p)
 823 {
 824         struct hci_dev *hdev = conn->hdev;
 825
 826         memset(p, 0, sizeof(*p));
 827
 828         p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
 829         p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
 830         p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
 831         p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
 832         p->conn_latency = cpu_to_le16(conn->le_conn_latency);
 833         p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
 834         p->min_ce_len = cpu_to_le16(0x0000);
 835         p->max_ce_len = cpu_to_le16(0x0000);
 836 }
 837
 838 static void hci_req_add_le_create_conn(struct hci_request *req,
 839                                        struct hci_conn *conn,
 840                                        bdaddr_t *direct_rpa)
 841 {
 842         struct hci_dev *hdev = conn->hdev;
 843         u8 own_addr_type;
 844
 845         /* If direct address was provided we use it instead of current
 846          * address.
 847          */
 848         if (direct_rpa) {
 849                 if (bacmp(&req->hdev->random_addr, direct_rpa))
 850                         hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
 851                                                                 direct_rpa);
 852
 853                 /* direct address is always RPA */
 854                 own_addr_type = ADDR_LE_DEV_RANDOM;
 855         } else {
 856                 /* Update random address, but set require_privacy to false so
 857                  * that we never connect with an non-resolvable address.
 858                  */
 859                 if (hci_update_random_address(req, false, conn_use_rpa(conn),
 860                                               &own_addr_type))
 861                         return;
 862         }
 863
 864         if (use_ext_conn(hdev)) {
 865                 struct hci_cp_le_ext_create_conn *cp;
 866                 struct hci_cp_le_ext_conn_param *p;
 867                 u8 data[sizeof(*cp) + sizeof(*p) * 3];
 868                 u32 plen;
 869
 870                 cp = (void *) data;
 871                 p = (void *) cp->data;
 872
 873                 memset(cp, 0, sizeof(*cp));
 874
 875                 bacpy(&cp->peer_addr, &conn->dst);
 876                 cp->peer_addr_type = conn->dst_type;
 877                 cp->own_addr_type = own_addr_type;
 878
 879                 plen = sizeof(*cp);
 880
 881                 if (scan_1m(hdev)) {
 882                         cp->phys |= LE_SCAN_PHY_1M;
 883                         set_ext_conn_params(conn, p);
 884
 885                         p++;
 886                         plen += sizeof(*p);
 887                 }
 888
 889                 if (scan_2m(hdev)) {
 890                         cp->phys |= LE_SCAN_PHY_2M;
 891                         set_ext_conn_params(conn, p);
 892
 893                         p++;
 894                         plen += sizeof(*p);
 895                 }
 896
 897                 if (scan_coded(hdev)) {
 898                         cp->phys |= LE_SCAN_PHY_CODED;
 899                         set_ext_conn_params(conn, p);
 900
 901                         plen += sizeof(*p);
 902                 }
 903
 904                 hci_req_add(req, HCI_OP_LE_EXT_CREATE_CONN, plen, data);
 905
 906         } else {
 907                 struct hci_cp_le_create_conn cp;
 908
 909                 memset(&cp, 0, sizeof(cp));
 910
 911                 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
 912                 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
 913
 914                 bacpy(&cp.peer_addr, &conn->dst);
 915                 cp.peer_addr_type = conn->dst_type;
 916                 cp.own_address_type = own_addr_type;
 917                 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
 918                 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
 919                 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
 920                 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
 921                 cp.min_ce_len = cpu_to_le16(0x0000);
 922                 cp.max_ce_len = cpu_to_le16(0x0000);
 923
 924                 hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
 925         }
 926
 927         conn->state = BT_CONNECT;
 928         clear_bit(HCI_CONN_SCANNING, &conn->flags);
 929 }
 930
 931 static void hci_req_directed_advertising(struct hci_request *req,
 932                                          struct hci_conn *conn)
 933 {
 934         struct hci_dev *hdev = req->hdev;
 935         u8 own_addr_type;
 936         u8 enable;
 937
 938         if (ext_adv_capable(hdev)) {
 939                 struct hci_cp_le_set_ext_adv_params cp;
 940                 bdaddr_t random_addr;
 941
 942                 /* Set require_privacy to false so that the remote device has a
 943                  * chance of identifying us.
 944                  */
 945                 if (hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
 946                                            &own_addr_type, &random_addr) < 0)
 947                         return;
 948
 949                 memset(&cp, 0, sizeof(cp));
 950
 951                 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
 952                 cp.own_addr_type = own_addr_type;
 953                 cp.channel_map = hdev->le_adv_channel_map;
 954                 cp.tx_power = HCI_TX_POWER_INVALID;
 955                 cp.primary_phy = HCI_ADV_PHY_1M;
 956                 cp.secondary_phy = HCI_ADV_PHY_1M;
 957                 cp.handle = 0; /* Use instance 0 for directed adv */
 958                 cp.own_addr_type = own_addr_type;
 959                 cp.peer_addr_type = conn->dst_type;
 960                 bacpy(&cp.peer_addr, &conn->dst);
 961
 962                 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
 963                  * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
 964                  * does not supports advertising data when the advertising set already
 965                  * contains some, the controller shall return erroc code 'Invalid
 966                  * HCI Command Parameters(0x12).
 967                  * So it is required to remove adv set for handle 0x00. since we use
 968                  * instance 0 for directed adv.
 969                  */
 970                 __hci_req_remove_ext_adv_instance(req, cp.handle);
 971
 972                 hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
 973
 974                 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
 975                     bacmp(&random_addr, BDADDR_ANY) &&
 976                     bacmp(&random_addr, &hdev->random_addr)) {
 977                         struct hci_cp_le_set_adv_set_rand_addr cp;
 978
 979                         memset(&cp, 0, sizeof(cp));
 980
 981                         cp.handle = 0;
 982                         bacpy(&cp.bdaddr, &random_addr);
 983
 984                         hci_req_add(req,
 985                                     HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
 986                                     sizeof(cp), &cp);
 987                 }
 988
 989                 __hci_req_enable_ext_advertising(req, 0x00);
 990         } else {
 991                 struct hci_cp_le_set_adv_param cp;
 992
 993                 /* Clear the HCI_LE_ADV bit temporarily so that the
 994                  * hci_update_random_address knows that it's safe to go ahead
 995                  * and write a new random address. The flag will be set back on
 996                  * as soon as the SET_ADV_ENABLE HCI command completes.
 997                  */
 998                 hci_dev_clear_flag(hdev, HCI_LE_ADV);
 999
1000                 /* Set require_privacy to false so that the remote device has a
1001                  * chance of identifying us.
1002                  */
1003                 if (hci_update_random_address(req, false, conn_use_rpa(conn),
1004                                               &own_addr_type) < 0)
1005                         return;
1006
1007                 memset(&cp, 0, sizeof(cp));
1008
1009                 /* Some controllers might reject command if intervals are not
1010                  * within range for undirected advertising.
1011                  * BCM20702A0 is known to be affected by this.
1012                  */
1013                 cp.min_interval = cpu_to_le16(0x0020);
1014                 cp.max_interval = cpu_to_le16(0x0020);
1015
1016                 cp.type = LE_ADV_DIRECT_IND;
1017                 cp.own_address_type = own_addr_type;
1018                 cp.direct_addr_type = conn->dst_type;
1019                 bacpy(&cp.direct_addr, &conn->dst);
1020                 cp.channel_map = hdev->le_adv_channel_map;
1021
1022                 hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
1023
1024                 enable = 0x01;
1025                 hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
1026                             &enable);
1027         }
1028
1029         conn->state = BT_CONNECT;
1030 }
1031
1032 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1033                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
1034                                 u8 role, bdaddr_t *direct_rpa)
1035 {
1036         struct hci_conn_params *params;
1037         struct hci_conn *conn;
1038         struct smp_irk *irk;
1039         struct hci_request req;
1040         int err;
1041
1042         /* This ensures that during disable le_scan address resolution
1043          * will not be disabled if it is followed by le_create_conn
1044          */
1045         bool rpa_le_conn = true;
1046
1047         /* Let's make sure that le is enabled.*/
1048         if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1049                 if (lmp_le_capable(hdev))
1050                         return ERR_PTR(-ECONNREFUSED);
1051
1052                 return ERR_PTR(-EOPNOTSUPP);
1053         }
1054
1055         /* Since the controller supports only one LE connection attempt at a
1056          * time, we return -EBUSY if there is any connection attempt running.
1057          */
1058         if (hci_lookup_le_connect(hdev))
1059                 return ERR_PTR(-EBUSY);
1060
1061         /* If there's already a connection object but it's not in
1062          * scanning state it means it must already be established, in
1063          * which case we can't do anything else except report a failure
1064          * to connect.
1065          */
1066         conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1067         if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
1068                 return ERR_PTR(-EBUSY);
1069         }
1070
1071         /* When given an identity address with existing identity
1072          * resolving key, the connection needs to be established
1073          * to a resolvable random address.
1074          *
1075          * Storing the resolvable random address is required here
1076          * to handle connection failures. The address will later
1077          * be resolved back into the original identity address
1078          * from the connect request.
1079          */
1080         irk = hci_find_irk_by_addr(hdev, dst, dst_type);
1081         if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
1082                 dst = &irk->rpa;
1083                 dst_type = ADDR_LE_DEV_RANDOM;
1084         }
1085
1086         if (conn) {
1087                 bacpy(&conn->dst, dst);
1088         } else {
1089                 conn = hci_conn_add(hdev, LE_LINK, dst, role);
1090                 if (!conn)
1091                         return ERR_PTR(-ENOMEM);
1092                 hci_conn_hold(conn);
1093                 conn->pending_sec_level = sec_level;
1094         }
1095
1096         conn->dst_type = dst_type;
1097         conn->sec_level = BT_SECURITY_LOW;
1098         conn->conn_timeout = conn_timeout;
1099
1100         hci_req_init(&req, hdev);
1101
1102         /* Disable advertising if we're active. For master role
1103          * connections most controllers will refuse to connect if
1104          * advertising is enabled, and for slave role connections we
1105          * anyway have to disable it in order to start directed
1106          * advertising. Any registered advertisements will be
1107          * re-enabled after the connection attempt is finished.
1108          */
1109         if (hci_dev_test_flag(hdev, HCI_LE_ADV))
1110                 __hci_req_pause_adv_instances(&req);
1111
1112         /* If requested to connect as slave use directed advertising */
1113         if (conn->role == HCI_ROLE_SLAVE) {
1114                 /* If we're active scanning most controllers are unable
1115                  * to initiate advertising. Simply reject the attempt.
1116                  */
1117                 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
1118                     hdev->le_scan_type == LE_SCAN_ACTIVE) {
1119                         hci_req_purge(&req);
1120                         hci_conn_del(conn);
1121                         return ERR_PTR(-EBUSY);
1122                 }
1123
1124                 hci_req_directed_advertising(&req, conn);
1125                 goto create_conn;
1126         }
1127
1128         params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
1129         if (params) {
1130                 conn->le_conn_min_interval = params->conn_min_interval;
1131                 conn->le_conn_max_interval = params->conn_max_interval;
1132                 conn->le_conn_latency = params->conn_latency;
1133                 conn->le_supv_timeout = params->supervision_timeout;
1134         } else {
1135                 conn->le_conn_min_interval = hdev->le_conn_min_interval;
1136                 conn->le_conn_max_interval = hdev->le_conn_max_interval;
1137                 conn->le_conn_latency = hdev->le_conn_latency;
1138                 conn->le_supv_timeout = hdev->le_supv_timeout;
1139         }
1140
1141         /* If controller is scanning, we stop it since some controllers are
1142          * not able to scan and connect at the same time. Also set the
1143          * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
1144          * handler for scan disabling knows to set the correct discovery
1145          * state.
1146          */
1147         if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
1148                 hci_req_add_le_scan_disable(&req, rpa_le_conn);
1149                 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
1150         }
1151
1152         hci_req_add_le_create_conn(&req, conn, direct_rpa);
1153
1154 create_conn:
1155         err = hci_req_run(&req, create_le_conn_complete);
1156         if (err) {
1157                 hci_conn_del(conn);
1158
1159                 if (hdev->adv_instance_cnt)
1160                         hci_req_resume_adv_instances(hdev);
1161
1162                 return ERR_PTR(err);
1163         }
1164
1165         return conn;
1166 }
1167
1168 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
1169 {
1170         struct hci_conn *conn;
1171
1172         conn = hci_conn_hash_lookup_le(hdev, addr, type);
1173         if (!conn)
1174                 return false;
1175
1176         if (conn->state != BT_CONNECTED)
1177                 return false;
1178
1179         return true;
1180 }
1181
1182 /* This function requires the caller holds hdev->lock */
1183 static int hci_explicit_conn_params_set(struct hci_dev *hdev,
1184                                         bdaddr_t *addr, u8 addr_type)
1185 {
1186         struct hci_conn_params *params;
1187
1188         if (is_connected(hdev, addr, addr_type))
1189                 return -EISCONN;
1190
1191         params = hci_conn_params_lookup(hdev, addr, addr_type);
1192         if (!params) {
1193                 params = hci_conn_params_add(hdev, addr, addr_type);
1194                 if (!params)
1195                         return -ENOMEM;
1196
1197                 /* If we created new params, mark them to be deleted in
1198                  * hci_connect_le_scan_cleanup. It's different case than
1199                  * existing disabled params, those will stay after cleanup.
1200                  */
1201                 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
1202         }
1203
1204         /* We're trying to connect, so make sure params are at pend_le_conns */
1205         if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
1206             params->auto_connect == HCI_AUTO_CONN_REPORT ||
1207             params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
1208                 list_del_init(&params->action);
1209                 list_add(&params->action, &hdev->pend_le_conns);
1210         }
1211
1212         params->explicit_connect = true;
1213
1214         BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
1215                params->auto_connect);
1216
1217         return 0;
1218 }
1219
1220 /* This function requires the caller holds hdev->lock */
1221 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1222                                      u8 dst_type, u8 sec_level,
1223                                      u16 conn_timeout,
1224                                      enum conn_reasons conn_reason)
1225 {
1226         struct hci_conn *conn;
1227
1228         /* Let's make sure that le is enabled.*/
1229         if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1230                 if (lmp_le_capable(hdev))
1231                         return ERR_PTR(-ECONNREFUSED);
1232
1233                 return ERR_PTR(-EOPNOTSUPP);
1234         }
1235
1236         /* Some devices send ATT messages as soon as the physical link is
1237          * established. To be able to handle these ATT messages, the user-
1238          * space first establishes the connection and then starts the pairing
1239          * process.
1240          *
1241          * So if a hci_conn object already exists for the following connection
1242          * attempt, we simply update pending_sec_level and auth_type fields
1243          * and return the object found.
1244          */
1245         conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1246         if (conn) {
1247                 if (conn->pending_sec_level < sec_level)
1248                         conn->pending_sec_level = sec_level;
1249                 goto done;
1250         }
1251
1252         BT_DBG("requesting refresh of dst_addr");
1253
1254         conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
1255         if (!conn)
1256                 return ERR_PTR(-ENOMEM);
1257
1258         if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
1259                 hci_conn_del(conn);
1260                 return ERR_PTR(-EBUSY);
1261         }
1262
1263         conn->state = BT_CONNECT;
1264         set_bit(HCI_CONN_SCANNING, &conn->flags);
1265         conn->dst_type = dst_type;
1266         conn->sec_level = BT_SECURITY_LOW;
1267         conn->pending_sec_level = sec_level;
1268         conn->conn_timeout = conn_timeout;
1269         conn->conn_reason = conn_reason;
1270
1271         hci_update_background_scan(hdev);
1272
1273 done:
1274         hci_conn_hold(conn);
1275         return conn;
1276 }
1277
1278 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1279                                  u8 sec_level, u8 auth_type,
1280                                  enum conn_reasons conn_reason)
1281 {
1282         struct hci_conn *acl;
1283
1284         if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1285                 if (lmp_bredr_capable(hdev))
1286                         return ERR_PTR(-ECONNREFUSED);
1287
1288                 return ERR_PTR(-EOPNOTSUPP);
1289         }
1290
1291         acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1292         if (!acl) {
1293                 acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1294                 if (!acl)
1295                         return ERR_PTR(-ENOMEM);
1296         }
1297
1298         hci_conn_hold(acl);
1299
1300         acl->conn_reason = conn_reason;
1301         if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1302                 acl->sec_level = BT_SECURITY_LOW;
1303                 acl->pending_sec_level = sec_level;
1304                 acl->auth_type = auth_type;
1305                 hci_acl_create_connection(acl);
1306         }
1307
1308         return acl;
1309 }
1310
1311 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1312                                  __u16 setting)
1313 {
1314         struct hci_conn *acl;
1315         struct hci_conn *sco;
1316
1317         acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
1318                               CONN_REASON_SCO_CONNECT);
1319         if (IS_ERR(acl))
1320                 return acl;
1321
1322         sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1323         if (!sco) {
1324                 sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
1325                 if (!sco) {
1326                         hci_conn_drop(acl);
1327                         return ERR_PTR(-ENOMEM);
1328                 }
1329         }
1330
1331         acl->link = sco;
1332         sco->link = acl;
1333
1334         hci_conn_hold(sco);
1335
1336         sco->setting = setting;
1337
1338         if (acl->state == BT_CONNECTED &&
1339             (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1340                 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1341                 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1342
1343                 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1344                         /* defer SCO setup until mode change completed */
1345                         set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1346                         return sco;
1347                 }
1348
1349                 hci_sco_setup(acl, 0x00);
1350         }
1351
1352         return sco;
1353 }
1354
1355 /* Check link security requirement */
1356 int hci_conn_check_link_mode(struct hci_conn *conn)
1357 {
1358         BT_DBG("hcon %p", conn);
1359
1360         /* In Secure Connections Only mode, it is required that Secure
1361          * Connections is used and the link is encrypted with AES-CCM
1362          * using a P-256 authenticated combination key.
1363          */
1364         if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
1365                 if (!hci_conn_sc_enabled(conn) ||
1366                     !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
1367                     conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
1368                         return 0;
1369         }
1370
1371          /* AES encryption is required for Level 4:
1372           *
1373           * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
1374           * page 1319:
1375           *
1376           * 128-bit equivalent strength for link and encryption keys
1377           * required using FIPS approved algorithms (E0 not allowed,
1378           * SAFER+ not allowed, and P-192 not allowed; encryption key
1379           * not shortened)
1380           */
1381         if (conn->sec_level == BT_SECURITY_FIPS &&
1382             !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
1383                 bt_dev_err(conn->hdev,
1384                            "Invalid security: Missing AES-CCM usage");
1385                 return 0;
1386         }
1387
1388         if (hci_conn_ssp_enabled(conn) &&
1389             !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1390                 return 0;
1391
1392         return 1;
1393 }
1394
1395 /* Authenticate remote device */
1396 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
1397 {
1398         BT_DBG("hcon %p", conn);
1399
1400         if (conn->pending_sec_level > sec_level)
1401                 sec_level = conn->pending_sec_level;
1402
1403         if (sec_level > conn->sec_level)
1404                 conn->pending_sec_level = sec_level;
1405         else if (test_bit(HCI_CONN_AUTH, &conn->flags))
1406                 return 1;
1407
1408         /* Make sure we preserve an existing MITM requirement*/
1409         auth_type |= (conn->auth_type & 0x01);
1410
1411         conn->auth_type = auth_type;
1412
1413         if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
1414                 struct hci_cp_auth_requested cp;
1415
1416                 cp.handle = cpu_to_le16(conn->handle);
1417                 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
1418                              sizeof(cp), &cp);
1419
1420                 /* If we're already encrypted set the REAUTH_PEND flag,
1421                  * otherwise set the ENCRYPT_PEND.
1422                  */
1423                 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1424                         set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
1425                 else
1426                         set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
1427         }
1428
1429         return 0;
1430 }
1431
1432 /* Encrypt the link */
1433 static void hci_conn_encrypt(struct hci_conn *conn)
1434 {
1435         BT_DBG("hcon %p", conn);
1436
1437         if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
1438                 struct hci_cp_set_conn_encrypt cp;
1439                 cp.handle  = cpu_to_le16(conn->handle);
1440                 cp.encrypt = 0x01;
1441                 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
1442                              &cp);
1443         }
1444 }
1445
1446 /* Enable security */
1447 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1448                       bool initiator)
1449 {
1450         BT_DBG("hcon %p", conn);
1451
1452         if (conn->type == LE_LINK)
1453                 return smp_conn_security(conn, sec_level);
1454
1455         /* For sdp we don't need the link key. */
1456         if (sec_level == BT_SECURITY_SDP)
1457                 return 1;
1458
1459         /* For non 2.1 devices and low security level we don't need the link
1460            key. */
1461         if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
1462                 return 1;
1463
1464         /* For other security levels we need the link key. */
1465         if (!test_bit(HCI_CONN_AUTH, &conn->flags))
1466                 goto auth;
1467
1468         /* An authenticated FIPS approved combination key has sufficient
1469          * security for security level 4. */
1470         if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
1471             sec_level == BT_SECURITY_FIPS)
1472                 goto encrypt;
1473
1474         /* An authenticated combination key has sufficient security for
1475            security level 3. */
1476         if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
1477              conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
1478             sec_level == BT_SECURITY_HIGH)
1479                 goto encrypt;
1480
1481         /* An unauthenticated combination key has sufficient security for
1482            security level 1 and 2. */
1483         if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
1484              conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
1485             (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
1486                 goto encrypt;
1487
1488         /* A combination key has always sufficient security for the security
1489            levels 1 or 2. High security level requires the combination key
1490            is generated using maximum PIN code length (16).
1491            For pre 2.1 units. */
1492         if (conn->key_type == HCI_LK_COMBINATION &&
1493             (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
1494              conn->pin_length == 16))
1495                 goto encrypt;
1496
1497 auth:
1498         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1499                 return 0;
1500
1501         if (initiator)
1502                 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
1503
1504         if (!hci_conn_auth(conn, sec_level, auth_type))
1505                 return 0;
1506
1507 encrypt:
1508         if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
1509                 /* Ensure that the encryption key size has been read,
1510                  * otherwise stall the upper layer responses.
1511                  */
1512                 if (!conn->enc_key_size)
1513                         return 0;
1514
1515                 /* Nothing else needed, all requirements are met */
1516                 return 1;
1517         }
1518
1519         hci_conn_encrypt(conn);
1520         return 0;
1521 }
1522 EXPORT_SYMBOL(hci_conn_security);
1523
1524 /* Check secure link requirement */
1525 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
1526 {
1527         BT_DBG("hcon %p", conn);
1528
1529         /* Accept if non-secure or higher security level is required */
1530         if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
1531                 return 1;
1532
1533         /* Accept if secure or higher security level is already present */
1534         if (conn->sec_level == BT_SECURITY_HIGH ||
1535             conn->sec_level == BT_SECURITY_FIPS)
1536                 return 1;
1537
1538         /* Reject not secure link */
1539         return 0;
1540 }
1541 EXPORT_SYMBOL(hci_conn_check_secure);
1542
1543 /* Switch role */
1544 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
1545 {
1546         BT_DBG("hcon %p", conn);
1547
1548         if (role == conn->role)
1549                 return 1;
1550
1551         if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
1552                 struct hci_cp_switch_role cp;
1553                 bacpy(&cp.bdaddr, &conn->dst);
1554                 cp.role = role;
1555                 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
1556         }
1557
1558         return 0;
1559 }
1560 EXPORT_SYMBOL(hci_conn_switch_role);
1561
1562 /* Enter active mode */
1563 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
1564 {
1565         struct hci_dev *hdev = conn->hdev;
1566
1567         BT_DBG("hcon %p mode %d", conn, conn->mode);
1568
1569         if (conn->mode != HCI_CM_SNIFF)
1570                 goto timer;
1571
1572         if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
1573                 goto timer;
1574
1575         if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
1576                 struct hci_cp_exit_sniff_mode cp;
1577                 cp.handle = cpu_to_le16(conn->handle);
1578                 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
1579         }
1580
1581 timer:
1582         if (hdev->idle_timeout > 0)
1583                 queue_delayed_work(hdev->workqueue, &conn->idle_work,
1584                                    msecs_to_jiffies(hdev->idle_timeout));
1585 }
1586
1587 /* Drop all connection on the device */
1588 void hci_conn_hash_flush(struct hci_dev *hdev)
1589 {
1590         struct hci_conn_hash *h = &hdev->conn_hash;
1591         struct hci_conn *c, *n;
1592
1593         BT_DBG("hdev %s", hdev->name);
1594
1595         list_for_each_entry_safe(c, n, &h->list, list) {
1596                 c->state = BT_CLOSED;
1597
1598                 hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
1599                 hci_conn_del(c);
1600         }
1601 }
1602
1603 /* Check pending connect attempts */
1604 void hci_conn_check_pending(struct hci_dev *hdev)
1605 {
1606         struct hci_conn *conn;
1607
1608         BT_DBG("hdev %s", hdev->name);
1609
1610         hci_dev_lock(hdev);
1611
1612         conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
1613         if (conn)
1614                 hci_acl_create_connection(conn);
1615
1616         hci_dev_unlock(hdev);
1617 }
1618
1619 static u32 get_link_mode(struct hci_conn *conn)
1620 {
1621         u32 link_mode = 0;
1622
1623         if (conn->role == HCI_ROLE_MASTER)
1624                 link_mode |= HCI_LM_MASTER;
1625
1626         if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1627                 link_mode |= HCI_LM_ENCRYPT;
1628
1629         if (test_bit(HCI_CONN_AUTH, &conn->flags))
1630                 link_mode |= HCI_LM_AUTH;
1631
1632         if (test_bit(HCI_CONN_SECURE, &conn->flags))
1633                 link_mode |= HCI_LM_SECURE;
1634
1635         if (test_bit(HCI_CONN_FIPS, &conn->flags))
1636                 link_mode |= HCI_LM_FIPS;
1637
1638         return link_mode;
1639 }
1640
1641 int hci_get_conn_list(void __user *arg)
1642 {
1643         struct hci_conn *c;
1644         struct hci_conn_list_req req, *cl;
1645         struct hci_conn_info *ci;
1646         struct hci_dev *hdev;
1647         int n = 0, size, err;
1648
1649         if (copy_from_user(&req, arg, sizeof(req)))
1650                 return -EFAULT;
1651
1652         if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
1653                 return -EINVAL;
1654
1655         size = sizeof(req) + req.conn_num * sizeof(*ci);
1656
1657         cl = kmalloc(size, GFP_KERNEL);
1658         if (!cl)
1659                 return -ENOMEM;
1660
1661         hdev = hci_dev_get(req.dev_id);
1662         if (!hdev) {
1663                 kfree(cl);
1664                 return -ENODEV;
1665         }
1666
1667         ci = cl->conn_info;
1668
1669         hci_dev_lock(hdev);
1670         list_for_each_entry(c, &hdev->conn_hash.list, list) {
1671                 bacpy(&(ci + n)->bdaddr, &c->dst);
1672                 (ci + n)->handle = c->handle;
1673                 (ci + n)->type  = c->type;
1674                 (ci + n)->out   = c->out;
1675                 (ci + n)->state = c->state;
1676                 (ci + n)->link_mode = get_link_mode(c);
1677                 if (++n >= req.conn_num)
1678                         break;
1679         }
1680         hci_dev_unlock(hdev);
1681
1682         cl->dev_id = hdev->id;
1683         cl->conn_num = n;
1684         size = sizeof(req) + n * sizeof(*ci);
1685
1686         hci_dev_put(hdev);
1687
1688         err = copy_to_user(arg, cl, size);
1689         kfree(cl);
1690
1691         return err ? -EFAULT : 0;
1692 }
1693
1694 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
1695 {
1696         struct hci_conn_info_req req;
1697         struct hci_conn_info ci;
1698         struct hci_conn *conn;
1699         char __user *ptr = arg + sizeof(req);
1700
1701         if (copy_from_user(&req, arg, sizeof(req)))
1702                 return -EFAULT;
1703
1704         hci_dev_lock(hdev);
1705         conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
1706         if (conn) {
1707                 bacpy(&ci.bdaddr, &conn->dst);
1708                 ci.handle = conn->handle;
1709                 ci.type  = conn->type;
1710                 ci.out   = conn->out;
1711                 ci.state = conn->state;
1712                 ci.link_mode = get_link_mode(conn);
1713         }
1714         hci_dev_unlock(hdev);
1715
1716         if (!conn)
1717                 return -ENOENT;
1718
1719         return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
1720 }
1721
1722 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
1723 {
1724         struct hci_auth_info_req req;
1725         struct hci_conn *conn;
1726
1727         if (copy_from_user(&req, arg, sizeof(req)))
1728                 return -EFAULT;
1729
1730         hci_dev_lock(hdev);
1731         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
1732         if (conn)
1733                 req.type = conn->auth_type;
1734         hci_dev_unlock(hdev);
1735
1736         if (!conn)
1737                 return -ENOENT;
1738
1739         return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
1740 }
1741
1742 struct hci_chan *hci_chan_create(struct hci_conn *conn)
1743 {
1744         struct hci_dev *hdev = conn->hdev;
1745         struct hci_chan *chan;
1746
1747         BT_DBG("%s hcon %p", hdev->name, conn);
1748
1749         if (test_bit(HCI_CONN_DROP, &conn->flags)) {
1750                 BT_DBG("Refusing to create new hci_chan");
1751                 return NULL;
1752         }
1753
1754         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
1755         if (!chan)
1756                 return NULL;
1757
1758         chan->conn = hci_conn_get(conn);
1759         skb_queue_head_init(&chan->data_q);
1760         chan->state = BT_CONNECTED;
1761
1762         list_add_rcu(&chan->list, &conn->chan_list);
1763
1764         return chan;
1765 }
1766
1767 void hci_chan_del(struct hci_chan *chan)
1768 {
1769         struct hci_conn *conn = chan->conn;
1770         struct hci_dev *hdev = conn->hdev;
1771
1772         BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
1773
1774         list_del_rcu(&chan->list);
1775
1776         synchronize_rcu();
1777
1778         /* Prevent new hci_chan's to be created for this hci_conn */
1779         set_bit(HCI_CONN_DROP, &conn->flags);
1780
1781         hci_conn_put(conn);
1782
1783         skb_queue_purge(&chan->data_q);
1784         kfree(chan);
1785 }
1786
1787 void hci_chan_list_flush(struct hci_conn *conn)
1788 {
1789         struct hci_chan *chan, *n;
1790
1791         BT_DBG("hcon %p", conn);
1792
1793         list_for_each_entry_safe(chan, n, &conn->chan_list, list)
1794                 hci_chan_del(chan);
1795 }
1796
1797 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
1798                                                  __u16 handle)
1799 {
1800         struct hci_chan *hchan;
1801
1802         list_for_each_entry(hchan, &hcon->chan_list, list) {
1803                 if (hchan->handle == handle)
1804                         return hchan;
1805         }
1806
1807         return NULL;
1808 }
1809
1810 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
1811 {
1812         struct hci_conn_hash *h = &hdev->conn_hash;
1813         struct hci_conn *hcon;
1814         struct hci_chan *hchan = NULL;
1815
1816         rcu_read_lock();
1817
1818         list_for_each_entry_rcu(hcon, &h->list, list) {
1819                 hchan = __hci_chan_lookup_handle(hcon, handle);
1820                 if (hchan)
1821                         break;
1822         }
1823
1824         rcu_read_unlock();
1825
1826         return hchan;
1827 }
1828
1829 u32 hci_conn_get_phy(struct hci_conn *conn)
1830 {
1831         u32 phys = 0;
1832
1833         hci_dev_lock(conn->hdev);
1834
1835         /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
1836          * Table 6.2: Packets defined for synchronous, asynchronous, and
1837          * CSB logical transport types.
1838          */
1839         switch (conn->type) {
1840         case SCO_LINK:
1841                 /* SCO logical transport (1 Mb/s):
1842                  * HV1, HV2, HV3 and DV.
1843                  */
1844                 phys |= BT_PHY_BR_1M_1SLOT;
1845
1846                 break;
1847
1848         case ACL_LINK:
1849                 /* ACL logical transport (1 Mb/s) ptt=0:
1850                  * DH1, DM3, DH3, DM5 and DH5.
1851                  */
1852                 phys |= BT_PHY_BR_1M_1SLOT;
1853
1854                 if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
1855                         phys |= BT_PHY_BR_1M_3SLOT;
1856
1857                 if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
1858                         phys |= BT_PHY_BR_1M_5SLOT;
1859
1860                 /* ACL logical transport (2 Mb/s) ptt=1:
1861                  * 2-DH1, 2-DH3 and 2-DH5.
1862                  */
1863                 if (!(conn->pkt_type & HCI_2DH1))
1864                         phys |= BT_PHY_EDR_2M_1SLOT;
1865
1866                 if (!(conn->pkt_type & HCI_2DH3))
1867                         phys |= BT_PHY_EDR_2M_3SLOT;
1868
1869                 if (!(conn->pkt_type & HCI_2DH5))
1870                         phys |= BT_PHY_EDR_2M_5SLOT;
1871
1872                 /* ACL logical transport (3 Mb/s) ptt=1:
1873                  * 3-DH1, 3-DH3 and 3-DH5.
1874                  */
1875                 if (!(conn->pkt_type & HCI_3DH1))
1876                         phys |= BT_PHY_EDR_3M_1SLOT;
1877
1878                 if (!(conn->pkt_type & HCI_3DH3))
1879                         phys |= BT_PHY_EDR_3M_3SLOT;
1880
1881                 if (!(conn->pkt_type & HCI_3DH5))
1882                         phys |= BT_PHY_EDR_3M_5SLOT;
1883
1884                 break;
1885
1886         case ESCO_LINK:
1887                 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
1888                 phys |= BT_PHY_BR_1M_1SLOT;
1889
1890                 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
1891                         phys |= BT_PHY_BR_1M_3SLOT;
1892
1893                 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
1894                 if (!(conn->pkt_type & ESCO_2EV3))
1895                         phys |= BT_PHY_EDR_2M_1SLOT;
1896
1897                 if (!(conn->pkt_type & ESCO_2EV5))
1898                         phys |= BT_PHY_EDR_2M_3SLOT;
1899
1900                 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
1901                 if (!(conn->pkt_type & ESCO_3EV3))
1902                         phys |= BT_PHY_EDR_3M_1SLOT;
1903
1904                 if (!(conn->pkt_type & ESCO_3EV5))
1905                         phys |= BT_PHY_EDR_3M_3SLOT;
1906
1907                 break;
1908
1909         case LE_LINK:
1910                 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
1911                         phys |= BT_PHY_LE_1M_TX;
1912
1913                 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
1914                         phys |= BT_PHY_LE_1M_RX;
1915
1916                 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
1917                         phys |= BT_PHY_LE_2M_TX;
1918
1919                 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
1920                         phys |= BT_PHY_LE_2M_RX;
1921
1922                 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
1923                         phys |= BT_PHY_LE_CODED_TX;
1924
1925                 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
1926                         phys |= BT_PHY_LE_CODED_RX;
1927
1928                 break;
1929         }
1930
1931         hci_dev_unlock(conn->hdev);
1932
1933         return phys;
1934 }