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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 | /* * Copyright (c) 2018-2019 Nordic Semiconductor ASA * * SPDX-License-Identifier: Apache-2.0 */ #include <zephyr.h> #include <bluetooth/hci.h> #include <misc/byteorder.h> #include "util/util.h" #include "util/memq.h" #include "hal/ticker.h" #include "hal/ccm.h" #include "util/mayfly.h" #include "ticker/ticker.h" #include "pdu.h" #include "ll.h" #include "ll_feat.h" #include "lll.h" #include "lll_vendor.h" #include "lll_clock.h" #include "lll_scan.h" #include "lll_conn.h" #include "lll_master.h" #include "lll_tim_internal.h" #include "ull_scan_types.h" #include "ull_conn_types.h" #include "ull_internal.h" #include "ull_scan_internal.h" #include "ull_conn_internal.h" #include "ull_master_internal.h" #define LOG_MODULE_NAME bt_ctlr_llsw_ull_master #include "common/log.h" #include <soc.h> #include "hal/debug.h" static void ticker_op_stop_scan_cb(u32_t status, void *params); static void ticker_op_cb(u32_t status, void *params); static void access_addr_get(u8_t access_addr[]); u8_t ll_create_connection(u16_t scan_interval, u16_t scan_window, u8_t filter_policy, u8_t peer_addr_type, u8_t *p_peer_addr, u8_t own_addr_type, u16_t interval, u16_t latency, u16_t timeout) { struct lll_conn *conn_lll; struct ll_scan_set *scan; u32_t conn_interval_us; struct lll_scan *lll; struct ll_conn *conn; memq_link_t *link; u8_t access_addr[4]; u32_t err; u8_t hop; scan = ull_scan_is_disabled_get(0); if (!scan) { return BT_HCI_ERR_CMD_DISALLOWED; } lll = &scan->lll; if (lll->conn) { return BT_HCI_ERR_CMD_DISALLOWED; } link = ll_rx_link_alloc(); if (!link) { return BT_HCI_ERR_MEM_CAPACITY_EXCEEDED; } conn = ll_conn_acquire(); if (!conn) { ll_rx_link_release(link); return BT_HCI_ERR_MEM_CAPACITY_EXCEEDED; } err = ull_scan_params_set(scan, 0, scan_interval, scan_window, own_addr_type, filter_policy); if (err) { ll_conn_release(conn); ll_rx_link_release(link); return err; } lll->adv_addr_type = peer_addr_type; memcpy(lll->adv_addr, p_peer_addr, BDADDR_SIZE); lll->conn_timeout = timeout; lll->conn_ticks_slot = 0; /* TODO: */ conn_lll = &conn->lll; access_addr_get(access_addr); memcpy(conn_lll->access_addr, &access_addr, sizeof(conn_lll->access_addr)); bt_rand(&conn_lll->crc_init[0], 3); conn_lll->handle = 0xFFFF; conn_lll->interval = interval; conn_lll->latency = latency; if (!conn_lll->link_tx_free) { conn_lll->link_tx_free = &conn_lll->link_tx; } memq_init(conn_lll->link_tx_free, &conn_lll->memq_tx.head, &conn_lll->memq_tx.tail); conn_lll->link_tx_free = NULL; conn_lll->packet_tx_head_len = 0; conn_lll->packet_tx_head_offset = 0; conn_lll->sn = 0; conn_lll->nesn = 0; conn_lll->empty = 0; #if defined(CONFIG_BT_CTLR_LE_ENC) conn_lll->enc_rx = 0; conn_lll->enc_tx = 0; #endif /* CONFIG_BT_CTLR_LE_ENC */ #if defined(CONFIG_BT_CTLR_PHY) conn_lll->phy_tx = BIT(0); conn_lll->phy_flags = 0; conn_lll->phy_tx_time = BIT(0); conn_lll->phy_rx = BIT(0); #endif /* CONFIG_BT_CTLR_PHY */ #if defined(CONFIG_BT_CTLR_CONN_RSSI) conn_lll->rssi_latest = 0x7F; conn_lll->rssi_reported = 0x7F; conn_lll->rssi_sample_count = 0; #endif /* CONFIG_BT_CTLR_CONN_RSSI */ /* FIXME: BEGIN: Move to ULL? */ conn_lll->latency_prepare = 0; conn_lll->latency_event = 0; conn_lll->event_counter = 0; conn_lll->data_chan_count = ull_conn_chan_map_cpy(conn_lll->data_chan_map); bt_rand(&hop, sizeof(u8_t)); conn_lll->data_chan_hop = 5 + (hop % 12); conn_lll->data_chan_sel = 0; conn_lll->data_chan_use = 0; conn_lll->role = 0; /* FIXME: END: Move to ULL? */ conn->connect_expire = 6U; conn->supervision_expire = 0U; conn_interval_us = (u32_t)interval * 1250U; conn->supervision_reload = RADIO_CONN_EVENTS(timeout * 10000U, conn_interval_us); conn->procedure_expire = 0U; conn->procedure_reload = RADIO_CONN_EVENTS(40000000, conn_interval_us); #if defined(CONFIG_BT_CTLR_LE_PING) conn->apto_expire = 0U; /* APTO in no. of connection events */ conn->apto_reload = RADIO_CONN_EVENTS((30000000), conn_interval_us); conn->appto_expire = 0U; /* Dispatch LE Ping PDU 6 connection events (that peer would listen to) * before 30s timeout * TODO: "peer listens to" is greater than 30s due to latency */ conn->appto_reload = (conn->apto_reload > (conn_lll->latency + 6)) ? (conn->apto_reload - (conn_lll->latency + 6)) : conn->apto_reload; #endif /* CONFIG_BT_CTLR_LE_PING */ conn->common.fex_valid = 0U; conn->llcp_req = conn->llcp_ack = conn->llcp_type = 0U; conn->llcp_rx = NULL; conn->llcp_features = LL_FEAT; conn->llcp_version.tx = conn->llcp_version.rx = 0U; conn->llcp_terminate.reason_peer = 0U; /* NOTE: use allocated link for generating dedicated * terminate ind rx node */ conn->llcp_terminate.node_rx.hdr.link = link; #if defined(CONFIG_BT_CTLR_LE_ENC) conn->pause_tx = conn->pause_rx = conn->refresh = 0U; #endif /* CONFIG_BT_CTLR_LE_ENC */ #if defined(CONFIG_BT_CTLR_CONN_PARAM_REQ) conn->llcp_conn_param.req = 0U; conn->llcp_conn_param.ack = 0U; conn->llcp_conn_param.disabled = 0U; #endif /* CONFIG_BT_CTLR_CONN_PARAM_REQ */ #if defined(CONFIG_BT_CTLR_PHY) conn->llcp_phy.req = conn->llcp_phy.ack = 0U; conn->phy_pref_tx = ull_conn_default_phy_tx_get(); conn->phy_pref_rx = ull_conn_default_phy_rx_get(); conn->phy_pref_flags = 0U; #endif /* CONFIG_BT_CTLR_PHY */ conn->tx_head = conn->tx_ctrl = conn->tx_ctrl_last = conn->tx_data = conn->tx_data_last = 0; lll->conn = conn_lll; ull_hdr_init(&conn->ull); lll_hdr_init(&conn->lll, conn); #if defined(CONFIG_BT_CTLR_PRIVACY) ll_filters_scan_update(filter_policy); if (!filter_policy && ctrl_rl_enabled()) { /* Look up the resolving list */ rl_idx = ll_rl_find(peer_addr_type, peer_addr, NULL); } if (own_addr_type == BT_ADDR_LE_PUBLIC_ID || own_addr_type == BT_ADDR_LE_RANDOM_ID) { /* Generate RPAs if required */ ll_rl_rpa_update(false); own_addr_type &= 0x1; rpa_gen = 1; } #endif /* wait for stable clocks */ lll_clock_wait(); return ull_scan_enable(scan); } u8_t ll_connect_disable(void **rx) { struct lll_conn *conn_lll; struct ll_scan_set *scan; u8_t status; scan = ull_scan_is_enabled_get(0); if (!scan) { return BT_HCI_ERR_CMD_DISALLOWED; } conn_lll = scan->lll.conn; if (!conn_lll) { return BT_HCI_ERR_CMD_DISALLOWED; } status = ull_scan_disable(0, scan); if (!status) { struct ll_conn *conn = (void *)HDR_LLL2EVT(conn_lll); struct node_rx_pdu *cc; memq_link_t *link; cc = (void *)&conn->llcp_terminate.node_rx; link = cc->hdr.link; LL_ASSERT(link); /* free the memq link early, as caller could overwrite it */ ll_rx_link_release(link); cc->hdr.type = NODE_RX_TYPE_CONNECTION; cc->hdr.handle = 0xffff; *((u8_t *)cc->pdu) = BT_HCI_ERR_UNKNOWN_CONN_ID; *rx = cc; } return status; } u8_t ll_chm_update(u8_t *chm) { u16_t handle; u8_t ret; ull_conn_chan_map_set(chm); handle = CONFIG_BT_MAX_CONN; while (handle--) { struct ll_conn *conn; conn = ll_connected_get(handle); if (!conn || conn->lll.role) { continue; } ret = ull_conn_allowed_check(conn); if (ret) { return ret; } memcpy(conn->llcp.chan_map.chm, chm, sizeof(conn->llcp.chan_map.chm)); /* conn->llcp.chan_map.instant = 0; */ conn->llcp.chan_map.initiate = 1U; conn->llcp_type = LLCP_CHAN_MAP; conn->llcp_req++; } return 0; } #if defined(CONFIG_BT_CTLR_LE_ENC) u8_t ll_enc_req_send(u16_t handle, u8_t *rand, u8_t *ediv, u8_t *ltk) { struct ll_conn *conn; struct node_tx *tx; u8_t ret; conn = ll_connected_get(handle); if (!conn) { return BT_HCI_ERR_UNKNOWN_CONN_ID; } ret = ull_conn_allowed_check(conn); if (ret) { return ret; } tx = ll_tx_mem_acquire(); if (tx) { struct pdu_data *pdu_data_tx; pdu_data_tx = (void *)tx->pdu; memcpy(&conn->llcp.encryption.ltk[0], ltk, sizeof(conn->llcp.encryption.ltk)); if ((conn->lll.enc_rx == 0) && (conn->lll.enc_tx == 0)) { struct pdu_data_llctrl_enc_req *enc_req; pdu_data_tx->ll_id = PDU_DATA_LLID_CTRL; pdu_data_tx->len = offsetof(struct pdu_data_llctrl, enc_rsp) + sizeof(struct pdu_data_llctrl_enc_req); pdu_data_tx->llctrl.opcode = PDU_DATA_LLCTRL_TYPE_ENC_REQ; enc_req = (void *) &pdu_data_tx->llctrl.enc_req; memcpy(enc_req->rand, rand, sizeof(enc_req->rand)); enc_req->ediv[0] = ediv[0]; enc_req->ediv[1] = ediv[1]; bt_rand(enc_req->skdm, sizeof(enc_req->skdm)); bt_rand(enc_req->ivm, sizeof(enc_req->ivm)); } else if ((conn->lll.enc_rx != 0) && (conn->lll.enc_tx != 0)) { memcpy(&conn->llcp.encryption.rand[0], rand, sizeof(conn->llcp.encryption.rand)); conn->llcp.encryption.ediv[0] = ediv[0]; conn->llcp.encryption.ediv[1] = ediv[1]; pdu_data_tx->ll_id = PDU_DATA_LLID_CTRL; pdu_data_tx->len = offsetof(struct pdu_data_llctrl, enc_req); pdu_data_tx->llctrl.opcode = PDU_DATA_LLCTRL_TYPE_PAUSE_ENC_REQ; } else { ll_tx_mem_release(tx); return BT_HCI_ERR_CMD_DISALLOWED; } if (ll_tx_mem_enqueue(handle, tx)) { ll_tx_mem_release(tx); return BT_HCI_ERR_CMD_DISALLOWED; } conn->llcp.encryption.initiate = 1U; conn->llcp_type = LLCP_ENCRYPTION; conn->llcp_req++; return 0; } return BT_HCI_ERR_CMD_DISALLOWED; } #endif /* CONFIG_BT_CTLR_LE_ENC */ void ull_master_setup(memq_link_t *link, struct node_rx_hdr *rx, struct node_rx_ftr *ftr, struct lll_conn *lll) { u32_t conn_offset_us, conn_interval_us; u8_t ticker_id_scan, ticker_id_conn; u32_t ticks_slot_overhead; u32_t mayfly_was_enabled; u32_t ticks_slot_offset; struct ll_scan_set *scan; struct node_rx_cc *cc; struct ll_conn *conn; struct pdu_adv *pdu; u32_t ticker_status; u8_t chan_sel; ((struct lll_scan *)ftr->param)->conn = NULL; scan = ((struct lll_scan *)ftr->param)->hdr.parent; conn = lll->hdr.parent; pdu = (void *)((struct node_rx_pdu *)rx)->pdu; chan_sel = pdu->chan_sel; cc = (void *)pdu; cc->status = 0U; cc->role = 0U; cc->peer_addr_type = scan->lll.adv_addr_type; memcpy(cc->peer_addr, scan->lll.adv_addr, BDADDR_SIZE); cc->interval = lll->interval; cc->latency = lll->latency; cc->timeout = scan->lll.conn_timeout; cc->sca = lll_conn_sca_local_get(); lll->handle = ll_conn_handle_get(conn); rx->handle = lll->handle; /* Use Channel Selection Algorithm #2 if peer too supports it */ if (IS_ENABLED(CONFIG_BT_CTLR_CHAN_SEL_2)) { struct node_rx_pdu *rx_csa; struct node_rx_cs *cs; /* pick the rx node instance stored within the connection * rx node. */ rx_csa = (void *)ftr->extra; /* Enqueue the connection event */ ll_rx_put(link, rx); /* use the rx node for CSA event */ rx = (void *)rx_csa; link = rx->link; rx->handle = lll->handle; rx->type = NODE_RX_TYPE_CHAN_SEL_ALGO; cs = (void *)rx_csa->pdu; if (chan_sel) { u16_t aa_ls = ((u16_t)lll->access_addr[1] << 8) | lll->access_addr[0]; u16_t aa_ms = ((u16_t)lll->access_addr[3] << 8) | lll->access_addr[2]; lll->data_chan_sel = 1; lll->data_chan_id = aa_ms ^ aa_ls; cs->csa = 0x01; } else { cs->csa = 0x00; } } ll_rx_put(link, rx); ll_rx_sched(); /* TODO: active_to_start feature port */ conn->evt.ticks_active_to_start = 0U; conn->evt.ticks_xtal_to_start = HAL_TICKER_US_TO_TICKS(EVENT_OVERHEAD_XTAL_US); conn->evt.ticks_preempt_to_start = HAL_TICKER_US_TO_TICKS(EVENT_OVERHEAD_PREEMPT_MIN_US); conn->evt.ticks_slot = HAL_TICKER_US_TO_TICKS(EVENT_OVERHEAD_START_US + ftr->us_radio_rdy + 328 + TIFS_US + 328); ticks_slot_offset = MAX(conn->evt.ticks_active_to_start, conn->evt.ticks_xtal_to_start); if (IS_ENABLED(CONFIG_BT_CTLR_LOW_LAT)) { ticks_slot_overhead = ticks_slot_offset; } else { ticks_slot_overhead = 0U; } conn_interval_us = lll->interval * 1250; conn_offset_us = ftr->us_radio_end; conn_offset_us += HAL_TICKER_TICKS_TO_US(1); conn_offset_us -= EVENT_OVERHEAD_START_US; conn_offset_us -= ftr->us_radio_rdy; /* disable ticker job, in order to chain stop and start to avoid RTC * being stopped if no tickers active. */ #if (CONFIG_BT_CTLR_ULL_HIGH_PRIO == CONFIG_BT_CTLR_ULL_LOW_PRIO) mayfly_was_enabled = mayfly_is_enabled(TICKER_USER_ID_ULL_HIGH, TICKER_USER_ID_ULL_LOW); mayfly_enable(TICKER_USER_ID_ULL_HIGH, TICKER_USER_ID_ULL_LOW, 0); #endif /* Stop Scanner */ ticker_id_scan = TICKER_ID_SCAN_BASE + ull_scan_handle_get(scan); ticker_status = ticker_stop(TICKER_INSTANCE_ID_CTLR, TICKER_USER_ID_ULL_HIGH, ticker_id_scan, ticker_op_stop_scan_cb, (void *)(u32_t)ticker_id_scan); ticker_op_stop_scan_cb(ticker_status, (void *)(u32_t)ticker_id_scan); /* Scanner stop can expire while here in this ISR. * Deferred attempt to stop can fail as it would have * expired, hence ignore failure. */ ticker_stop(TICKER_INSTANCE_ID_CTLR, TICKER_USER_ID_ULL_HIGH, TICKER_ID_SCAN_STOP, NULL, NULL); /* Start master */ ticker_id_conn = TICKER_ID_CONN_BASE + ll_conn_handle_get(conn); ticker_status = ticker_start(TICKER_INSTANCE_ID_CTLR, TICKER_USER_ID_ULL_HIGH, ticker_id_conn, ftr->ticks_anchor - ticks_slot_offset, HAL_TICKER_US_TO_TICKS(conn_offset_us), HAL_TICKER_US_TO_TICKS(conn_interval_us), HAL_TICKER_REMAINDER(conn_interval_us), TICKER_NULL_LAZY, (conn->evt.ticks_slot + ticks_slot_overhead), ull_master_ticker_cb, conn, ticker_op_cb, (void *)__LINE__); LL_ASSERT((ticker_status == TICKER_STATUS_SUCCESS) || (ticker_status == TICKER_STATUS_BUSY)); #if (CONFIG_BT_CTLR_ULL_HIGH_PRIO == CONFIG_BT_CTLR_ULL_LOW_PRIO) /* enable ticker job, if disabled in this function */ if (mayfly_was_enabled) { mayfly_enable(TICKER_USER_ID_ULL_HIGH, TICKER_USER_ID_ULL_LOW, 1); } #else ARG_UNUSED(mayfly_was_enabled); #endif #if 0 /* Populate the master context */ conn->handle = mem_index_get(conn, _radio.conn_pool, CONNECTION_T_SIZE); /* Prepare the rx packet structure */ node_rx->hdr.handle = conn->handle; node_rx->hdr.type = NODE_RX_TYPE_CONNECTION; /* prepare connection complete structure */ pdu_data = (void *)node_rx->pdu; cc = (void *)pdu_data->lldata; cc->status = 0x00; cc->role = 0x00; #if defined(CONFIG_BT_CTLR_PRIVACY) cc->own_addr_type = pdu_adv_tx->tx_addr; memcpy(&cc->own_addr[0], &pdu_adv_tx->connect_ind.init_addr[0], BDADDR_SIZE); if (irkmatch_ok && rl_idx != FILTER_IDX_NONE) { /* TODO: store rl_idx instead if safe */ /* Store identity address */ ll_rl_id_addr_get(rl_idx, &cc->peer_addr_type, &cc->peer_addr[0]); /* Mark it as identity address from RPA (0x02, 0x03) */ cc->peer_addr_type += 2; /* Store peer RPA */ memcpy(&cc->peer_rpa[0], &pdu_adv_tx->connect_ind.adv_addr[0], BDADDR_SIZE); } else { memset(&cc->peer_rpa[0], 0x0, BDADDR_SIZE); #else if (1) { #endif /* CONFIG_BT_CTLR_PRIVACY */ cc->peer_addr_type = pdu_adv_tx->rx_addr; memcpy(&cc->peer_addr[0], &pdu_adv_tx->connect_ind.adv_addr[0], BDADDR_SIZE); } cc->interval = _radio.scanner.conn_interval; cc->latency = _radio.scanner.conn_latency; cc->timeout = _radio.scanner.conn_timeout; cc->mca = pdu_adv_tx->connect_ind.sca; /* enqueue connection complete structure into queue */ rx_fc_lock(conn->handle); packet_rx_enqueue(); /* Use Channel Selection Algorithm #2 if peer too supports it */ if (IS_ENABLED(CONFIG_BT_CTLR_CHAN_SEL_2)) { struct node_rx_cs *cs; /* Generate LE Channel Selection Algorithm event */ node_rx = packet_rx_reserve_get(3); LL_ASSERT(node_rx); node_rx->hdr.handle = conn->handle; node_rx->hdr.type = NODE_RX_TYPE_CHAN_SEL_ALGO; pdu_data = (void *)node_rx->pdu; cs = (void *)pdu_data->lldata; if (pdu_adv_rx->chan_sel) { u16_t aa_ls = ((u16_t)conn->access_addr[1] << 8) | conn->access_addr[0]; u16_t aa_ms = ((u16_t)conn->access_addr[3] << 8) | conn->access_addr[2]; conn->data_chan_sel = 1; conn->data_chan_id = aa_ms ^ aa_ls; cs->csa = 0x01; } else { cs->csa = 0x00; } packet_rx_enqueue(); } /* Calculate master slot */ conn->hdr.ticks_active_to_start = _radio.ticks_active_to_start; conn->hdr.ticks_xtal_to_start = HAL_TICKER_US_TO_TICKS( EVENT_OVERHEAD_XTAL_US); conn->hdr.ticks_preempt_to_start = HAL_TICKER_US_TO_TICKS( EVENT_OVERHEAD_PREEMPT_MIN_US); conn->hdr.ticks_slot = _radio.scanner.ticks_conn_slot; ticks_slot_offset = MAX(conn->hdr.ticks_active_to_start, conn->hdr.ticks_xtal_to_start); /* Stop Scanner */ ticker_status = ticker_stop(TICKER_INSTANCE_ID_CTLR, TICKER_USER_ID_LLL, TICKER_ID_SCAN_BASE, ticker_stop_scan_assert, (void *)__LINE__); ticker_stop_scan_assert(ticker_status, (void *)__LINE__); /* Scanner stop can expire while here in this ISR. * Deferred attempt to stop can fail as it would have * expired, hence ignore failure. */ ticker_stop(TICKER_INSTANCE_ID_CTLR, TICKER_USER_ID_LLL, TICKER_ID_SCAN_STOP, NULL, NULL); /* Start master */ ticker_status = ticker_start(TICKER_INSTANCE_ID_CTLR, TICKER_USER_ID_LLL, TICKER_ID_CONN_BASE + conn->handle, (_radio.ticks_anchor - ticks_slot_offset), HAL_TICKER_US_TO_TICKS(conn_space_us), HAL_TICKER_US_TO_TICKS(conn_interval_us), HAL_TICKER_REMAINDER(conn_interval_us), TICKER_NULL_LAZY, (ticks_slot_offset + conn->hdr.ticks_slot), event_master_prepare, conn, ticker_success_assert, (void *)__LINE__); LL_ASSERT((ticker_status == TICKER_STATUS_SUCCESS) || (ticker_status == TICKER_STATUS_BUSY)); #endif } void ull_master_ticker_cb(u32_t ticks_at_expire, u32_t remainder, u16_t lazy, void *param) { static memq_link_t link; static struct mayfly mfy = {0, 0, &link, NULL, lll_master_prepare}; static struct lll_prepare_param p; struct ll_conn *conn = param; u32_t err; u8_t ref; int ret; DEBUG_RADIO_PREPARE_M(1); /* Handle any LL Control Procedures */ ret = ull_conn_llcp(conn, ticks_at_expire, lazy); if (ret) { return; } /* Increment prepare reference count */ ref = ull_ref_inc(&conn->ull); LL_ASSERT(ref); /* De-mux 1 tx node from FIFO */ ull_conn_tx_demux(1); /* Enqueue towards LLL */ ull_conn_tx_lll_enqueue(conn, 1); /* Append timing parameters */ p.ticks_at_expire = ticks_at_expire; p.remainder = remainder; p.lazy = lazy; p.param = &conn->lll; mfy.param = &p; /* Kick LLL prepare */ err = mayfly_enqueue(TICKER_USER_ID_ULL_HIGH, TICKER_USER_ID_LLL, 0, &mfy); LL_ASSERT(!err); /* De-mux remaining tx nodes from FIFO */ ull_conn_tx_demux(UINT8_MAX); /* Enqueue towards LLL */ ull_conn_tx_lll_enqueue(conn, UINT8_MAX); DEBUG_RADIO_PREPARE_M(1); } static void ticker_op_stop_scan_cb(u32_t status, void *params) { /* TODO: */ } static void ticker_op_cb(u32_t status, void *params) { ARG_UNUSED(params); LL_ASSERT(status == TICKER_STATUS_SUCCESS); } /** @brief Prepare access address as per BT Spec. * * - It shall have no more than six consecutive zeros or ones. * - It shall not be the advertising channel packets' Access Address. * - It shall not be a sequence that differs from the advertising channel * packets Access Address by only one bit. * - It shall not have all four octets equal. * - It shall have no more than 24 transitions. * - It shall have a minimum of two transitions in the most significant six * bits. * * LE Coded PHY requirements: * - It shall have at least three ones in the least significant 8 bits. * - It shall have no more than eleven transitions in the least significant 16 * bits. */ static void access_addr_get(u8_t access_addr[]) { #if defined(CONFIG_BT_CTLR_PHY_CODED) u8_t transitions_lsb16; u8_t ones_count_lsb8; #endif /* CONFIG_BT_CTLR_PHY_CODED */ u8_t consecutive_cnt; u8_t consecutive_bit; u32_t adv_aa_check; u32_t aa; u8_t transitions; u8_t bit_idx; u8_t retry; retry = 3U; again: LL_ASSERT(retry); retry--; bt_rand(access_addr, 4); aa = sys_get_le32(access_addr); bit_idx = 31U; transitions = 0U; consecutive_cnt = 1U; #if defined(CONFIG_BT_CTLR_PHY_CODED) ones_count_lsb8 = 0U; transitions_lsb16 = 0U; #endif /* CONFIG_BT_CTLR_PHY_CODED */ consecutive_bit = (aa >> bit_idx) & 0x01; while (bit_idx--) { #if defined(CONFIG_BT_CTLR_PHY_CODED) u8_t transitions_lsb16_prev = transitions_lsb16; #endif /* CONFIG_BT_CTLR_PHY_CODED */ u8_t consecutive_cnt_prev = consecutive_cnt; u8_t transitions_prev = transitions; u8_t bit; bit = (aa >> bit_idx) & 0x01; if (bit == consecutive_bit) { consecutive_cnt++; } else { consecutive_cnt = 1U; consecutive_bit = bit; transitions++; #if defined(CONFIG_BT_CTLR_PHY_CODED) if (bit_idx < 15) { transitions_lsb16++; } #endif /* CONFIG_BT_CTLR_PHY_CODED */ } #if defined(CONFIG_BT_CTLR_PHY_CODED) if ((bit_idx < 8) && consecutive_bit) { ones_count_lsb8++; } #endif /* CONFIG_BT_CTLR_PHY_CODED */ /* It shall have no more than six consecutive zeros or ones. */ /* It shall have a minimum of two transitions in the most * significant six bits. */ if ((consecutive_cnt > 6) || #if defined(CONFIG_BT_CTLR_PHY_CODED) (!consecutive_bit && (((bit_idx < 6) && (ones_count_lsb8 < 1)) || ((bit_idx < 5) && (ones_count_lsb8 < 2)) || ((bit_idx < 4) && (ones_count_lsb8 < 3)))) || #endif /* CONFIG_BT_CTLR_PHY_CODED */ ((consecutive_cnt < 6) && (((bit_idx < 29) && (transitions < 1)) || ((bit_idx < 28) && (transitions < 2))))) { if (consecutive_bit) { consecutive_bit = 0U; aa &= ~BIT(bit_idx); #if defined(CONFIG_BT_CTLR_PHY_CODED) if (bit_idx < 8) { ones_count_lsb8--; } #endif /* CONFIG_BT_CTLR_PHY_CODED */ } else { consecutive_bit = 1U; aa |= BIT(bit_idx); #if defined(CONFIG_BT_CTLR_PHY_CODED) if (bit_idx < 8) { ones_count_lsb8++; } #endif /* CONFIG_BT_CTLR_PHY_CODED */ } if (transitions != transitions_prev) { consecutive_cnt = consecutive_cnt_prev; transitions = transitions_prev; } else { consecutive_cnt = 1U; transitions++; } #if defined(CONFIG_BT_CTLR_PHY_CODED) if (bit_idx < 15) { if (transitions_lsb16 != transitions_lsb16_prev) { transitions_lsb16 = transitions_lsb16_prev; } else { transitions_lsb16++; } } #endif /* CONFIG_BT_CTLR_PHY_CODED */ } /* It shall have no more than 24 transitions * It shall have no more than eleven transitions in the least * significant 16 bits. */ if ((transitions > 24) || #if defined(CONFIG_BT_CTLR_PHY_CODED) (transitions_lsb16 > 11) || #endif /* CONFIG_BT_CTLR_PHY_CODED */ 0) { if (consecutive_bit) { aa &= ~(BIT(bit_idx + 1) - 1); } else { aa |= (BIT(bit_idx + 1) - 1); } break; } } /* It shall not be the advertising channel packets Access Address. * It shall not be a sequence that differs from the advertising channel * packets Access Address by only one bit. */ adv_aa_check = aa ^ 0x8e89bed6; if (util_ones_count_get((u8_t *)&adv_aa_check, sizeof(adv_aa_check)) <= 1) { goto again; } /* It shall not have all four octets equal. */ if (!((aa & 0xFFFF) ^ (aa >> 16)) && !((aa & 0xFF) ^ (aa >> 24))) { goto again; } sys_put_le32(aa, access_addr); } |