1 /****************************************************************************** 2 * 3 * Copyright (C) 2009-2012 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 /****************************************************************************** 20 * 21 * this file contains functions relating to BLE management. 22 * 23 ******************************************************************************/ 24 25 #include <string.h> 26 #include "bt_target.h" 27 #include "bt_utils.h" 28 #include "l2cdefs.h" 29 #include "l2c_int.h" 30 #include "btu.h" 31 #include "btm_int.h" 32 #include "hcimsgs.h" 33 34 #if (BLE_INCLUDED == TRUE) 35 static void l2cble_start_conn_update (tL2C_LCB *p_lcb); 36 37 #include "vendor_ble.h" 38 /******************************************************************************* 39 ** 40 ** Function L2CA_CancelBleConnectReq 41 ** 42 ** Description Cancel a pending connection attempt to a BLE device. 43 ** 44 ** Parameters: BD Address of remote 45 ** 46 ** Return value: TRUE if connection was cancelled 47 ** 48 *******************************************************************************/ 49 BOOLEAN L2CA_CancelBleConnectReq (BD_ADDR rem_bda) 50 { 51 tL2C_LCB *p_lcb; 52 53 /* There can be only one BLE connection request outstanding at a time */ 54 if (btm_ble_get_conn_st() == BLE_CONN_IDLE) 55 { 56 L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - no connection pending"); 57 return(FALSE); 58 } 59 60 if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN)) 61 { 62 L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - different BDA Connecting: %08x%04x Cancel: %08x%04x", 63 (l2cb.ble_connecting_bda[0]<<24)+(l2cb.ble_connecting_bda[1]<<16)+(l2cb.ble_connecting_bda[2]<<8)+l2cb.ble_connecting_bda[3], 64 (l2cb.ble_connecting_bda[4]<<8)+l2cb.ble_connecting_bda[5], 65 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]); 66 67 return(FALSE); 68 } 69 70 if (btsnd_hcic_ble_create_conn_cancel()) 71 { 72 73 if ((p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE)) != NULL) 74 { 75 p_lcb->disc_reason = L2CAP_CONN_CANCEL; 76 l2cu_release_lcb (p_lcb); 77 } 78 /* update state to be cancel, wait for connection cancel complete */ 79 btm_ble_set_conn_st (BLE_CONN_CANCEL); 80 81 return(TRUE); 82 } 83 else 84 return(FALSE); 85 } 86 87 /******************************************************************************* 88 ** 89 ** Function L2CA_UpdateBleConnParams 90 ** 91 ** Description Update BLE connection parameters. 92 ** 93 ** Parameters: BD Address of remote 94 ** 95 ** Return value: TRUE if update started 96 ** 97 *******************************************************************************/ 98 BOOLEAN L2CA_UpdateBleConnParams (BD_ADDR rem_bda, UINT16 min_int, UINT16 max_int, 99 UINT16 latency, UINT16 timeout) 100 { 101 tL2C_LCB *p_lcb; 102 tACL_CONN *p_acl_cb = btm_bda_to_acl(rem_bda, BT_TRANSPORT_LE); 103 104 /* See if we have a link control block for the remote device */ 105 p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE); 106 107 /* If we don't have one, create one and accept the connection. */ 108 if (!p_lcb || !p_acl_cb) 109 { 110 L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - unknown BD_ADDR %08x%04x", 111 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], 112 (rem_bda[4]<<8)+rem_bda[5]); 113 return(FALSE); 114 } 115 116 if (p_lcb->transport != BT_TRANSPORT_LE) 117 { 118 L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - BD_ADDR %08x%04x not LE", 119 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], 120 (rem_bda[4]<<8)+rem_bda[5]); 121 return(FALSE); 122 } 123 124 p_lcb->min_interval = min_int; 125 p_lcb->max_interval = max_int; 126 p_lcb->latency = latency; 127 p_lcb->timeout = timeout; 128 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; 129 130 l2cble_start_conn_update(p_lcb); 131 132 return(TRUE); 133 } 134 135 136 /******************************************************************************* 137 ** 138 ** Function L2CA_EnableUpdateBleConnParams 139 ** 140 ** Description Enable or disable update based on the request from the peer 141 ** 142 ** Parameters: BD Address of remote 143 ** 144 ** Return value: TRUE if update started 145 ** 146 *******************************************************************************/ 147 BOOLEAN L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, BOOLEAN enable) 148 { 149 tL2C_LCB *p_lcb; 150 151 /* See if we have a link control block for the remote device */ 152 p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE); 153 154 if (!p_lcb) 155 { 156 L2CAP_TRACE_WARNING ("L2CA_EnableUpdateBleConnParams - unknown BD_ADDR %08x%04x", 157 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], 158 (rem_bda[4]<<8)+rem_bda[5]); 159 return (FALSE); 160 } 161 162 L2CAP_TRACE_API ("%s - BD_ADDR %08x%04x enable %d current upd state 0x%02x",__FUNCTION__, 163 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], 164 (rem_bda[4]<<8)+rem_bda[5], enable, p_lcb->conn_update_mask); 165 166 if (p_lcb->transport != BT_TRANSPORT_LE) 167 { 168 L2CAP_TRACE_WARNING ("%s - BD_ADDR %08x%04x not LE (link role %d)", __FUNCTION__, 169 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], 170 (rem_bda[4]<<8)+rem_bda[5], p_lcb->link_role); 171 return (FALSE); 172 } 173 174 if (enable) 175 p_lcb->conn_update_mask &= ~L2C_BLE_CONN_UPDATE_DISABLE; 176 else 177 p_lcb->conn_update_mask |= L2C_BLE_CONN_UPDATE_DISABLE; 178 179 l2cble_start_conn_update(p_lcb); 180 181 return (TRUE); 182 } 183 184 185 /******************************************************************************* 186 ** 187 ** Function L2CA_GetBleConnRole 188 ** 189 ** Description This function returns the connection role. 190 ** 191 ** Returns link role. 192 ** 193 *******************************************************************************/ 194 UINT8 L2CA_GetBleConnRole (BD_ADDR bd_addr) 195 { 196 UINT8 role = HCI_ROLE_UNKNOWN; 197 198 tL2C_LCB *p_lcb; 199 200 if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_LE)) != NULL) 201 role = p_lcb->link_role; 202 203 return role; 204 } 205 /******************************************************************************* 206 ** 207 ** Function L2CA_GetDisconnectReason 208 ** 209 ** Description This function returns the disconnect reason code. 210 ** 211 ** Returns disconnect reason 212 ** 213 *******************************************************************************/ 214 UINT16 L2CA_GetDisconnectReason (BD_ADDR remote_bda, tBT_TRANSPORT transport) 215 { 216 tL2C_LCB *p_lcb; 217 UINT16 reason = 0; 218 219 if ((p_lcb = l2cu_find_lcb_by_bd_addr (remote_bda, transport)) != NULL) 220 reason = p_lcb->disc_reason; 221 222 L2CAP_TRACE_DEBUG ("L2CA_GetDisconnectReason=%d ",reason); 223 224 return reason; 225 } 226 227 /******************************************************************************* 228 ** 229 ** Function l2cble_notify_le_connection 230 ** 231 ** Description This function notifiy the l2cap connection to the app layer 232 ** 233 ** Returns none 234 ** 235 *******************************************************************************/ 236 void l2cble_notify_le_connection (BD_ADDR bda) 237 { 238 tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); 239 tACL_CONN *p_acl = btm_bda_to_acl(bda, BT_TRANSPORT_LE) ; 240 241 if (p_lcb != NULL && p_acl != NULL && p_lcb->link_state != LST_CONNECTED) 242 { 243 /* update link status */ 244 btm_establish_continue(p_acl); 245 /* update l2cap link status and send callback */ 246 p_lcb->link_state = LST_CONNECTED; 247 l2cu_process_fixed_chnl_resp (p_lcb); 248 } 249 } 250 251 /******************************************************************************* 252 ** 253 ** Function l2cble_scanner_conn_comp 254 ** 255 ** Description This function is called when an HCI Connection Complete 256 ** event is received while we are a scanner (so we are master). 257 ** 258 ** Returns void 259 ** 260 *******************************************************************************/ 261 void l2cble_scanner_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type, 262 UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout) 263 { 264 tL2C_LCB *p_lcb; 265 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda); 266 267 L2CAP_TRACE_DEBUG ("l2cble_scanner_conn_comp: HANDLE=%d addr_type=%d conn_interval=%d slave_latency=%d supervision_tout=%d", 268 handle, type, conn_interval, conn_latency, conn_timeout); 269 270 l2cb.is_ble_connecting = FALSE; 271 272 /* See if we have a link control block for the remote device */ 273 p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); 274 275 /* If we don't have one, create one. this is auto connection complete. */ 276 if (!p_lcb) 277 { 278 p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE); 279 if (!p_lcb) 280 { 281 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); 282 L2CAP_TRACE_ERROR ("l2cble_scanner_conn_comp - failed to allocate LCB"); 283 return; 284 } 285 else 286 { 287 if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) 288 { 289 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); 290 L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB"); 291 return ; 292 } 293 } 294 } 295 else if (p_lcb->link_state != LST_CONNECTING) 296 { 297 L2CAP_TRACE_ERROR ("L2CAP got BLE scanner conn_comp in bad state: %d", p_lcb->link_state); 298 return; 299 } 300 btu_stop_timer(&p_lcb->timer_entry); 301 302 /* Save the handle */ 303 p_lcb->handle = handle; 304 305 /* Connected OK. Change state to connected, we were scanning so we are master */ 306 p_lcb->link_role = HCI_ROLE_MASTER; 307 p_lcb->transport = BT_TRANSPORT_LE; 308 309 /* update link parameter, set slave link as non-spec default upon link up */ 310 p_lcb->min_interval = p_lcb->max_interval = conn_interval; 311 p_lcb->timeout = conn_timeout; 312 p_lcb->latency = conn_latency; 313 p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM; 314 315 /* If there are any preferred connection parameters, set them now */ 316 if ( (p_dev_rec->conn_params.min_conn_int >= BTM_BLE_CONN_INT_MIN ) && 317 (p_dev_rec->conn_params.min_conn_int <= BTM_BLE_CONN_INT_MAX ) && 318 (p_dev_rec->conn_params.max_conn_int >= BTM_BLE_CONN_INT_MIN ) && 319 (p_dev_rec->conn_params.max_conn_int <= BTM_BLE_CONN_INT_MAX ) && 320 (p_dev_rec->conn_params.slave_latency <= BTM_BLE_CONN_LATENCY_MAX ) && 321 (p_dev_rec->conn_params.supervision_tout >= BTM_BLE_CONN_SUP_TOUT_MIN) && 322 (p_dev_rec->conn_params.supervision_tout <= BTM_BLE_CONN_SUP_TOUT_MAX) && 323 ((conn_interval < p_dev_rec->conn_params.min_conn_int && 324 p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) || 325 (conn_interval > p_dev_rec->conn_params.max_conn_int) || 326 (conn_latency > p_dev_rec->conn_params.slave_latency) || 327 (conn_timeout > p_dev_rec->conn_params.supervision_tout))) 328 { 329 L2CAP_TRACE_ERROR ("upd_ll_conn_params: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d", 330 handle, p_dev_rec->conn_params.min_conn_int, p_dev_rec->conn_params.max_conn_int, 331 p_dev_rec->conn_params.slave_latency, p_dev_rec->conn_params.supervision_tout); 332 333 p_lcb->min_interval = p_dev_rec->conn_params.min_conn_int; 334 p_lcb->max_interval = p_dev_rec->conn_params.max_conn_int; 335 p_lcb->timeout = p_dev_rec->conn_params.supervision_tout; 336 p_lcb->latency = p_dev_rec->conn_params.slave_latency; 337 338 btsnd_hcic_ble_upd_ll_conn_params (handle, 339 p_dev_rec->conn_params.min_conn_int, 340 p_dev_rec->conn_params.max_conn_int, 341 p_dev_rec->conn_params.slave_latency, 342 p_dev_rec->conn_params.supervision_tout, 343 0, 0); 344 } 345 346 /* Tell BTM Acl management about the link */ 347 btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE); 348 349 p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT; 350 351 btm_ble_set_conn_st(BLE_CONN_IDLE); 352 } 353 354 355 /******************************************************************************* 356 ** 357 ** Function l2cble_advertiser_conn_comp 358 ** 359 ** Description This function is called when an HCI Connection Complete 360 ** event is received while we are an advertiser (so we are slave). 361 ** 362 ** Returns void 363 ** 364 *******************************************************************************/ 365 void l2cble_advertiser_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type, 366 UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout) 367 { 368 tL2C_LCB *p_lcb; 369 tBTM_SEC_DEV_REC *p_dev_rec; 370 UNUSED(type); 371 UNUSED(conn_interval); 372 UNUSED(conn_latency); 373 UNUSED(conn_timeout); 374 375 /* See if we have a link control block for the remote device */ 376 p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); 377 378 /* If we don't have one, create one and accept the connection. */ 379 if (!p_lcb) 380 { 381 p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE); 382 if (!p_lcb) 383 { 384 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); 385 L2CAP_TRACE_ERROR ("l2cble_advertiser_conn_comp - failed to allocate LCB"); 386 return; 387 } 388 else 389 { 390 if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) 391 { 392 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); 393 L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB"); 394 return ; 395 } 396 } 397 } 398 399 /* Save the handle */ 400 p_lcb->handle = handle; 401 402 /* Connected OK. Change state to connected, we were advertising, so we are slave */ 403 p_lcb->link_role = HCI_ROLE_SLAVE; 404 p_lcb->transport = BT_TRANSPORT_LE; 405 406 /* update link parameter, set slave link as non-spec default upon link up */ 407 p_lcb->min_interval = p_lcb->max_interval = conn_interval; 408 p_lcb->timeout = conn_timeout; 409 p_lcb->latency = conn_latency; 410 p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM; 411 412 /* Tell BTM Acl management about the link */ 413 p_dev_rec = btm_find_or_alloc_dev (bda); 414 415 btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE); 416 417 p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT; 418 419 if (!HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(btm_cb.devcb.local_le_features)) 420 { 421 p_lcb->link_state = LST_CONNECTED; 422 l2cu_process_fixed_chnl_resp (p_lcb); 423 } 424 425 /* when adv and initiating are both active, cancel the direct connection */ 426 if (l2cb.is_ble_connecting && memcmp(bda, l2cb.ble_connecting_bda, BD_ADDR_LEN) == 0) 427 { 428 L2CA_CancelBleConnectReq(bda); 429 } 430 } 431 432 /******************************************************************************* 433 ** 434 ** Function l2cble_conn_comp 435 ** 436 ** Description This function is called when an HCI Connection Complete 437 ** event is received. 438 ** 439 ** Returns void 440 ** 441 *******************************************************************************/ 442 void l2cble_conn_comp(UINT16 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type, 443 UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout) 444 { 445 if (role == HCI_ROLE_MASTER) 446 { 447 l2cble_scanner_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout); 448 } 449 else 450 { 451 l2cble_advertiser_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout); 452 } 453 } 454 455 /******************************************************************************* 456 ** 457 ** Function l2cble_start_conn_update 458 ** 459 ** Description start BLE connection parameter update process based on status 460 ** 461 ** Parameters: lcb : l2cap link control block 462 ** 463 ** Return value: none 464 ** 465 *******************************************************************************/ 466 static void l2cble_start_conn_update (tL2C_LCB *p_lcb) 467 { 468 UINT16 min_conn_int, max_conn_int, slave_latency, supervision_tout; 469 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev(p_lcb->remote_bd_addr); 470 tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE); 471 472 if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) return; 473 474 if (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) 475 { 476 /* application requests to disable parameters update. 477 If parameters are already updated, lets set them 478 up to what has been requested during connection establishement */ 479 if (p_lcb->conn_update_mask & L2C_BLE_NOT_DEFAULT_PARAM && 480 /* current connection interval is greater than default min */ 481 p_lcb->min_interval > BTM_BLE_CONN_INT_MIN) 482 { 483 /* use 7.5 ms as fast connection parameter, 0 slave latency */ 484 min_conn_int = max_conn_int = BTM_BLE_CONN_INT_MIN; 485 slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF; 486 supervision_tout = BTM_BLE_CONN_TIMEOUT_DEF; 487 488 /* if both side 4.1, or we are master device, send HCI command */ 489 if (p_lcb->link_role == HCI_ROLE_MASTER 490 #if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) 491 || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(btm_cb.devcb.local_le_features) && 492 HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features)) 493 #endif 494 ) 495 { 496 btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, min_conn_int, max_conn_int, 497 slave_latency, supervision_tout, 0, 0); 498 p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING; 499 } 500 else 501 { 502 l2cu_send_peer_ble_par_req (p_lcb, min_conn_int, max_conn_int, slave_latency, supervision_tout); 503 } 504 p_lcb->conn_update_mask &= ~L2C_BLE_NOT_DEFAULT_PARAM; 505 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; 506 } 507 } 508 else 509 { 510 /* application allows to do update, if we were delaying one do it now */ 511 if (p_lcb->conn_update_mask & L2C_BLE_NEW_CONN_PARAM) 512 { 513 /* if both side 4.1, or we are master device, send HCI command */ 514 if (p_lcb->link_role == HCI_ROLE_MASTER 515 #if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) 516 || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(btm_cb.devcb.local_le_features) && 517 HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features)) 518 #endif 519 ) 520 { 521 btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, p_lcb->min_interval, 522 p_lcb->max_interval, p_lcb->latency, p_lcb->timeout, 0, 0); 523 p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING; 524 } 525 else 526 { 527 l2cu_send_peer_ble_par_req (p_lcb, p_lcb->min_interval, p_lcb->max_interval, 528 p_lcb->latency, p_lcb->timeout); 529 } 530 p_lcb->conn_update_mask &= ~L2C_BLE_NEW_CONN_PARAM; 531 p_lcb->conn_update_mask |= L2C_BLE_NOT_DEFAULT_PARAM; 532 } 533 } 534 } 535 536 /******************************************************************************* 537 ** 538 ** Function l2cble_process_conn_update_evt 539 ** 540 ** Description This function enables the connection update request from remote 541 ** after a successful connection update response is received. 542 ** 543 ** Returns void 544 ** 545 *******************************************************************************/ 546 void l2cble_process_conn_update_evt (UINT16 handle, UINT8 status) 547 { 548 tL2C_LCB *p_lcb; 549 550 L2CAP_TRACE_DEBUG("l2cble_process_conn_update_evt"); 551 552 /* See if we have a link control block for the remote device */ 553 p_lcb = l2cu_find_lcb_by_handle(handle); 554 if (!p_lcb) 555 { 556 L2CAP_TRACE_WARNING("l2cble_process_conn_update_evt: Invalid handle: %d", handle); 557 return; 558 } 559 560 p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING; 561 562 if (status != HCI_SUCCESS) 563 { 564 L2CAP_TRACE_WARNING("l2cble_process_conn_update_evt: Error status: %d", status); 565 } 566 567 l2cble_start_conn_update(p_lcb); 568 569 L2CAP_TRACE_DEBUG("l2cble_process_conn_update_evt: conn_update_mask=%d", p_lcb->conn_update_mask); 570 } 571 /******************************************************************************* 572 ** 573 ** Function l2cble_process_sig_cmd 574 ** 575 ** Description This function is called when a signalling packet is received 576 ** on the BLE signalling CID 577 ** 578 ** Returns void 579 ** 580 *******************************************************************************/ 581 void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len) 582 { 583 UINT8 *p_pkt_end; 584 UINT8 cmd_code, id; 585 UINT16 cmd_len, rej_reason; 586 UINT16 result; 587 UINT16 min_interval, max_interval, latency, timeout; 588 589 p_pkt_end = p + pkt_len; 590 591 STREAM_TO_UINT8 (cmd_code, p); 592 STREAM_TO_UINT8 (id, p); 593 STREAM_TO_UINT16 (cmd_len, p); 594 595 /* Check command length does not exceed packet length */ 596 if ((p + cmd_len) > p_pkt_end) 597 { 598 L2CAP_TRACE_WARNING ("L2CAP - LE - format error, pkt_len: %d cmd_len: %d code: %d", pkt_len, cmd_len, cmd_code); 599 return; 600 } 601 602 switch (cmd_code) 603 { 604 case L2CAP_CMD_REJECT: 605 case L2CAP_CMD_ECHO_RSP: 606 case L2CAP_CMD_INFO_RSP: 607 STREAM_TO_UINT16 (rej_reason, p); 608 break; 609 case L2CAP_CMD_ECHO_REQ: 610 case L2CAP_CMD_INFO_REQ: 611 l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); 612 break; 613 614 case L2CAP_CMD_BLE_UPDATE_REQ: 615 STREAM_TO_UINT16 (min_interval, p); /* 0x0006 - 0x0C80 */ 616 STREAM_TO_UINT16 (max_interval, p); /* 0x0006 - 0x0C80 */ 617 STREAM_TO_UINT16 (latency, p); /* 0x0000 - 0x03E8 */ 618 STREAM_TO_UINT16 (timeout, p); /* 0x000A - 0x0C80 */ 619 /* If we are a master, the slave wants to update the parameters */ 620 if (p_lcb->link_role == HCI_ROLE_MASTER) 621 { 622 if (min_interval < BTM_BLE_CONN_INT_MIN || min_interval > BTM_BLE_CONN_INT_MAX || 623 max_interval < BTM_BLE_CONN_INT_MIN || max_interval > BTM_BLE_CONN_INT_MAX || 624 latency > BTM_BLE_CONN_LATENCY_MAX || 625 /*(timeout >= max_interval && latency > (timeout * 10/(max_interval * 1.25) - 1)) ||*/ 626 timeout < BTM_BLE_CONN_SUP_TOUT_MIN || timeout > BTM_BLE_CONN_SUP_TOUT_MAX || 627 max_interval < min_interval) 628 { 629 l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_UNACCEPTABLE_PARAMS, id); 630 } 631 else 632 { 633 634 l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id); 635 636 p_lcb->min_interval = min_interval; 637 p_lcb->max_interval = max_interval; 638 p_lcb->latency = latency; 639 p_lcb->timeout = timeout; 640 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; 641 642 l2cble_start_conn_update(p_lcb); 643 } 644 } 645 else 646 l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); 647 break; 648 649 case L2CAP_CMD_BLE_UPDATE_RSP: 650 STREAM_TO_UINT16 (result, p); 651 break; 652 653 default: 654 L2CAP_TRACE_WARNING ("L2CAP - LE - unknown cmd code: %d", cmd_code); 655 l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); 656 return; 657 } 658 } 659 660 /******************************************************************************* 661 ** 662 ** Function l2cble_init_direct_conn 663 ** 664 ** Description This function is to initate a direct connection 665 ** 666 ** Returns TRUE connection initiated, FALSE otherwise. 667 ** 668 *******************************************************************************/ 669 BOOLEAN l2cble_init_direct_conn (tL2C_LCB *p_lcb) 670 { 671 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_lcb->remote_bd_addr); 672 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb; 673 UINT16 scan_int, scan_win; 674 BD_ADDR init_addr; 675 UINT8 init_addr_type = BLE_ADDR_PUBLIC, 676 own_addr_type = BLE_ADDR_PUBLIC; 677 678 /* There can be only one BLE connection request outstanding at a time */ 679 if (p_dev_rec == NULL) 680 { 681 L2CAP_TRACE_WARNING ("unknown device, can not initate connection"); 682 return(FALSE); 683 } 684 685 scan_int = (p_cb->scan_int == BTM_BLE_CONN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int; 686 scan_win = (p_cb->scan_win == BTM_BLE_CONN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win; 687 688 init_addr_type = p_lcb->ble_addr_type; 689 memcpy(init_addr, p_lcb->remote_bd_addr, BD_ADDR_LEN); 690 691 #if BLE_PRIVACY_SPT == TRUE 692 /* if RPA offloading supported */ 693 if (btm_ble_vendor_irk_list_load_dev(p_dev_rec)) 694 btm_random_pseudo_to_public(init_addr, &init_addr_type); 695 /* otherwise, if remote is RPA enabled, use latest RPA */ 696 else if (p_dev_rec->ble.active_addr_type == BTM_BLE_ADDR_RRA) 697 { 698 init_addr_type = BLE_ADDR_RANDOM; 699 memcpy(init_addr, p_dev_rec->ble.cur_rand_addr, BD_ADDR_LEN); 700 } 701 /* if privacy is on and current do not consider using reconnection address */ 702 if (btm_cb.ble_ctr_cb.privacy ) /* && p_dev_rec->ble.use_reconn_addr */ 703 own_addr_type = BLE_ADDR_RANDOM; 704 #endif 705 706 if (!btm_ble_topology_check(BTM_BLE_STATE_INIT)) 707 { 708 l2cu_release_lcb (p_lcb); 709 L2CAP_TRACE_ERROR("initate direct connection fail, topology limitation"); 710 return FALSE; 711 } 712 713 if (!btsnd_hcic_ble_create_ll_conn (scan_int,/* UINT16 scan_int */ 714 scan_win, /* UINT16 scan_win */ 715 FALSE, /* UINT8 white_list */ 716 init_addr_type, /* UINT8 addr_type_peer */ 717 init_addr, /* BD_ADDR bda_peer */ 718 own_addr_type, /* UINT8 addr_type_own */ 719 (UINT16) ((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? 720 p_dev_rec->conn_params.min_conn_int : BTM_BLE_CONN_INT_MIN_DEF), /* UINT16 conn_int_min */ 721 (UINT16) ((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? 722 p_dev_rec->conn_params.max_conn_int : BTM_BLE_CONN_INT_MAX_DEF), /* UINT16 conn_int_max */ 723 (UINT16) ((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ? 724 p_dev_rec->conn_params.slave_latency : BTM_BLE_CONN_SLAVE_LATENCY_DEF), /* UINT16 conn_latency */ 725 (UINT16) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ? 726 p_dev_rec->conn_params.supervision_tout : BTM_BLE_CONN_TIMEOUT_DEF), /* conn_timeout */ 727 0, /* UINT16 min_len */ 728 0)) /* UINT16 max_len */ 729 { 730 l2cu_release_lcb (p_lcb); 731 L2CAP_TRACE_ERROR("initate direct connection fail, no resources"); 732 return (FALSE); 733 } 734 else 735 { 736 p_lcb->link_state = LST_CONNECTING; 737 l2cb.is_ble_connecting = TRUE; 738 memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN); 739 btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_BLE_LINK_CONNECT_TOUT); 740 btm_ble_set_conn_st (BLE_DIR_CONN); 741 742 return (TRUE); 743 } 744 } 745 746 /******************************************************************************* 747 ** 748 ** Function l2cble_create_conn 749 ** 750 ** Description This function initiates an acl connection via HCI 751 ** 752 ** Returns TRUE if successful, FALSE if connection not started. 753 ** 754 *******************************************************************************/ 755 BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb) 756 { 757 tBTM_BLE_CONN_ST conn_st = btm_ble_get_conn_st(); 758 BOOLEAN rt = FALSE; 759 760 /* There can be only one BLE connection request outstanding at a time */ 761 if (conn_st == BLE_CONN_IDLE) 762 { 763 rt = l2cble_init_direct_conn(p_lcb); 764 } 765 else 766 { 767 L2CAP_TRACE_WARNING ("L2CAP - LE - cannot start new connection at conn st: %d", conn_st); 768 769 btm_ble_enqueue_direct_conn_req(p_lcb); 770 771 if (conn_st == BLE_BG_CONN) 772 btm_ble_suspend_bg_conn(); 773 774 rt = TRUE; 775 } 776 return rt; 777 } 778 779 /******************************************************************************* 780 ** 781 ** Function l2c_link_processs_ble_num_bufs 782 ** 783 ** Description This function is called when a "controller buffer size" 784 ** event is first received from the controller. It updates 785 ** the L2CAP values. 786 ** 787 ** Returns void 788 ** 789 *******************************************************************************/ 790 void l2c_link_processs_ble_num_bufs (UINT16 num_lm_ble_bufs) 791 { 792 if (num_lm_ble_bufs == 0) 793 { 794 num_lm_ble_bufs = L2C_DEF_NUM_BLE_BUF_SHARED; 795 l2cb.num_lm_acl_bufs -= L2C_DEF_NUM_BLE_BUF_SHARED; 796 } 797 798 l2cb.num_lm_ble_bufs = l2cb.controller_le_xmit_window = num_lm_ble_bufs; 799 } 800 801 /******************************************************************************* 802 ** 803 ** Function l2c_ble_link_adjust_allocation 804 ** 805 ** Description This function is called when a link is created or removed 806 ** to calculate the amount of packets each link may send to 807 ** the HCI without an ack coming back. 808 ** 809 ** Currently, this is a simple allocation, dividing the 810 ** number of Controller Packets by the number of links. In 811 ** the future, QOS configuration should be examined. 812 ** 813 ** Returns void 814 ** 815 *******************************************************************************/ 816 void l2c_ble_link_adjust_allocation (void) 817 { 818 UINT16 qq, yy, qq_remainder; 819 tL2C_LCB *p_lcb; 820 UINT16 hi_quota, low_quota; 821 UINT16 num_lowpri_links = 0; 822 UINT16 num_hipri_links = 0; 823 UINT16 controller_xmit_quota = l2cb.num_lm_ble_bufs; 824 UINT16 high_pri_link_quota = L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A; 825 826 /* If no links active, reset buffer quotas and controller buffers */ 827 if (l2cb.num_ble_links_active == 0) 828 { 829 l2cb.controller_le_xmit_window = l2cb.num_lm_ble_bufs; 830 l2cb.ble_round_robin_quota = l2cb.ble_round_robin_unacked = 0; 831 return; 832 } 833 834 /* First, count the links */ 835 for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++) 836 { 837 if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE) 838 { 839 if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) 840 num_hipri_links++; 841 else 842 num_lowpri_links++; 843 } 844 } 845 846 /* now adjust high priority link quota */ 847 low_quota = num_lowpri_links ? 1 : 0; 848 while ( (num_hipri_links * high_pri_link_quota + low_quota) > controller_xmit_quota ) 849 high_pri_link_quota--; 850 851 852 /* Work out the xmit quota and buffer quota high and low priorities */ 853 hi_quota = num_hipri_links * high_pri_link_quota; 854 low_quota = (hi_quota < controller_xmit_quota) ? controller_xmit_quota - hi_quota : 1; 855 856 /* Work out and save the HCI xmit quota for each low priority link */ 857 858 /* If each low priority link cannot have at least one buffer */ 859 if (num_lowpri_links > low_quota) 860 { 861 l2cb.ble_round_robin_quota = low_quota; 862 qq = qq_remainder = 1; 863 } 864 /* If each low priority link can have at least one buffer */ 865 else if (num_lowpri_links > 0) 866 { 867 l2cb.ble_round_robin_quota = 0; 868 l2cb.ble_round_robin_unacked = 0; 869 qq = low_quota / num_lowpri_links; 870 qq_remainder = low_quota % num_lowpri_links; 871 } 872 /* If no low priority link */ 873 else 874 { 875 l2cb.ble_round_robin_quota = 0; 876 l2cb.ble_round_robin_unacked = 0; 877 qq = qq_remainder = 1; 878 } 879 L2CAP_TRACE_EVENT ("l2c_ble_link_adjust_allocation num_hipri: %u num_lowpri: %u low_quota: %u round_robin_quota: %u qq: %u", 880 num_hipri_links, num_lowpri_links, low_quota, 881 l2cb.ble_round_robin_quota, qq); 882 883 /* Now, assign the quotas to each link */ 884 for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++) 885 { 886 if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE) 887 { 888 if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) 889 { 890 p_lcb->link_xmit_quota = high_pri_link_quota; 891 } 892 else 893 { 894 /* Safety check in case we switched to round-robin with something outstanding */ 895 /* if sent_not_acked is added into round_robin_unacked then don't add it again */ 896 /* l2cap keeps updating sent_not_acked for exiting from round robin */ 897 if (( p_lcb->link_xmit_quota > 0 )&&( qq == 0 )) 898 l2cb.ble_round_robin_unacked += p_lcb->sent_not_acked; 899 900 p_lcb->link_xmit_quota = qq; 901 if (qq_remainder > 0) 902 { 903 p_lcb->link_xmit_quota++; 904 qq_remainder--; 905 } 906 } 907 908 L2CAP_TRACE_EVENT("l2c_ble_link_adjust_allocation LCB %d Priority: %d XmitQuota: %d", 909 yy, p_lcb->acl_priority, p_lcb->link_xmit_quota); 910 911 L2CAP_TRACE_EVENT(" SentNotAcked: %d RRUnacked: %d", 912 p_lcb->sent_not_acked, l2cb.round_robin_unacked); 913 914 /* There is a special case where we have readjusted the link quotas and */ 915 /* this link may have sent anything but some other link sent packets so */ 916 /* so we may need a timer to kick off this link's transmissions. */ 917 if ( (p_lcb->link_state == LST_CONNECTED) 918 && (p_lcb->link_xmit_data_q.count) 919 && (p_lcb->sent_not_acked < p_lcb->link_xmit_quota) ) 920 btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_LINK_FLOW_CONTROL_TOUT); 921 } 922 } 923 } 924 925 #if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) 926 /******************************************************************************* 927 ** 928 ** Function l2cble_process_rc_param_request_evt 929 ** 930 ** Description process LE Remote Connection Parameter Request Event. 931 ** 932 ** Returns void 933 ** 934 *******************************************************************************/ 935 void l2cble_process_rc_param_request_evt(UINT16 handle, UINT16 int_min, UINT16 int_max, 936 UINT16 latency, UINT16 timeout) 937 { 938 tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle (handle); 939 940 if (p_lcb != NULL) 941 { 942 p_lcb->min_interval = int_min; 943 p_lcb->max_interval = int_max; 944 p_lcb->latency = latency; 945 p_lcb->timeout = timeout; 946 947 /* if update is enabled, always accept connection parameter update */ 948 if ((p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0) 949 { 950 btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, 0, 0); 951 } 952 else 953 { 954 L2CAP_TRACE_EVENT ("L2CAP - LE - update currently disabled"); 955 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; 956 btsnd_hcic_ble_rc_param_req_neg_reply (handle,HCI_ERR_UNACCEPT_CONN_INTERVAL); 957 } 958 959 } 960 else 961 { 962 L2CAP_TRACE_WARNING("No link to update connection parameter") 963 } 964 } 965 #endif 966 967 968 #endif /* (BLE_INCLUDED == TRUE) */ 969
