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