1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack-config.h" 46 47 #include "hci.h" 48 #include "gap.h" 49 50 #ifdef HAVE_BLE 51 #include "gap_le.h" 52 #endif 53 54 #include <stdarg.h> 55 #include <string.h> 56 #include <stdio.h> 57 #include <inttypes.h> 58 59 #ifndef EMBEDDED 60 #ifdef _WIN32 61 #include "Winsock2.h" 62 #else 63 #include <unistd.h> // gethostbyname 64 #endif 65 #include <btstack/version.h> 66 #endif 67 68 #include "btstack_memory.h" 69 #include "debug.h" 70 #include "hci_dump.h" 71 72 #include <btstack/linked_list.h> 73 #include <btstack/hci_cmds.h> 74 75 #define HCI_CONNECTION_TIMEOUT_MS 10000 76 77 #ifdef USE_BLUETOOL 78 #include "../platforms/ios/src/bt_control_iphone.h" 79 #endif 80 81 static void hci_update_scan_enable(void); 82 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 83 static void hci_connection_timeout_handler(timer_source_t *timer); 84 static void hci_connection_timestamp(hci_connection_t *connection); 85 static int hci_power_control_on(void); 86 static void hci_power_control_off(void); 87 static void hci_state_reset(void); 88 89 #ifdef HAVE_BLE 90 // called from test/ble_client/advertising_data_parser.c 91 void le_handle_advertisement_report(uint8_t *packet, int size); 92 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 93 #endif 94 95 // the STACK is here 96 #ifndef HAVE_MALLOC 97 static hci_stack_t hci_stack_static; 98 #endif 99 static hci_stack_t * hci_stack = NULL; 100 101 // test helper 102 static uint8_t disable_l2cap_timeouts = 0; 103 104 /** 105 * create connection for given address 106 * 107 * @return connection OR NULL, if no memory left 108 */ 109 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 110 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 111 hci_connection_t * conn = btstack_memory_hci_connection_get(); 112 if (!conn) return NULL; 113 memset(conn, 0, sizeof(hci_connection_t)); 114 BD_ADDR_COPY(conn->address, addr); 115 conn->address_type = addr_type; 116 conn->con_handle = 0xffff; 117 conn->authentication_flags = AUTH_FLAGS_NONE; 118 conn->bonding_flags = 0; 119 conn->requested_security_level = LEVEL_0; 120 linked_item_set_user(&conn->timeout.item, conn); 121 conn->timeout.process = hci_connection_timeout_handler; 122 hci_connection_timestamp(conn); 123 conn->acl_recombination_length = 0; 124 conn->acl_recombination_pos = 0; 125 conn->num_acl_packets_sent = 0; 126 conn->num_sco_packets_sent = 0; 127 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 128 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 129 return conn; 130 } 131 132 133 /** 134 * get le connection parameter range 135 * 136 * @return le connection parameter range struct 137 */ 138 void gap_le_get_connection_parameter_range(le_connection_parameter_range_t range){ 139 range = hci_stack->le_connection_parameter_range; 140 } 141 142 /** 143 * set le connection parameter range 144 * 145 */ 146 147 void gap_le_set_connection_parameter_range(le_connection_parameter_range_t range){ 148 hci_stack->le_connection_parameter_range = range; 149 } 150 151 /** 152 * get hci connections iterator 153 * 154 * @return hci connections iterator 155 */ 156 157 void hci_connections_get_iterator(linked_list_iterator_t *it){ 158 linked_list_iterator_init(it, &hci_stack->connections); 159 } 160 161 /** 162 * get connection for a given handle 163 * 164 * @return connection OR NULL, if not found 165 */ 166 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 167 linked_list_iterator_t it; 168 linked_list_iterator_init(&it, &hci_stack->connections); 169 while (linked_list_iterator_has_next(&it)){ 170 hci_connection_t * item = (hci_connection_t *) linked_list_iterator_next(&it); 171 if ( item->con_handle == con_handle ) { 172 return item; 173 } 174 } 175 return NULL; 176 } 177 178 /** 179 * get connection for given address 180 * 181 * @return connection OR NULL, if not found 182 */ 183 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 184 linked_list_iterator_t it; 185 linked_list_iterator_init(&it, &hci_stack->connections); 186 while (linked_list_iterator_has_next(&it)){ 187 hci_connection_t * connection = (hci_connection_t *) linked_list_iterator_next(&it); 188 if (connection->address_type != addr_type) continue; 189 if (memcmp(addr, connection->address, 6) != 0) continue; 190 return connection; 191 } 192 return NULL; 193 } 194 195 static void hci_connection_timeout_handler(timer_source_t *timer){ 196 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 197 #ifdef HAVE_TIME 198 struct timeval tv; 199 gettimeofday(&tv, NULL); 200 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 201 // connections might be timed out 202 hci_emit_l2cap_check_timeout(connection); 203 } 204 #endif 205 #ifdef HAVE_TICK 206 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 207 // connections might be timed out 208 hci_emit_l2cap_check_timeout(connection); 209 } 210 #endif 211 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 212 run_loop_add_timer(timer); 213 } 214 215 static void hci_connection_timestamp(hci_connection_t *connection){ 216 #ifdef HAVE_TIME 217 gettimeofday(&connection->timestamp, NULL); 218 #endif 219 #ifdef HAVE_TICK 220 connection->timestamp = embedded_get_ticks(); 221 #endif 222 } 223 224 225 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 226 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 227 } 228 229 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 230 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 231 } 232 233 234 /** 235 * add authentication flags and reset timer 236 * @note: assumes classic connection 237 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 238 */ 239 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 240 bd_addr_t addr; 241 bt_flip_addr(addr, bd_addr); 242 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 243 if (conn) { 244 connectionSetAuthenticationFlags(conn, flags); 245 hci_connection_timestamp(conn); 246 } 247 } 248 249 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 250 hci_connection_t * conn = hci_connection_for_handle(handle); 251 if (!conn) return 0; 252 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 253 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 254 return 0; 255 } 256 257 void hci_drop_link_key_for_bd_addr(bd_addr_t addr){ 258 if (hci_stack->remote_device_db) { 259 hci_stack->remote_device_db->delete_link_key(addr); 260 } 261 } 262 263 int hci_is_le_connection(hci_connection_t * connection){ 264 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 265 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 266 } 267 268 269 /** 270 * count connections 271 */ 272 static int nr_hci_connections(void){ 273 int count = 0; 274 linked_item_t *it; 275 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 276 return count; 277 } 278 279 /** 280 * Dummy handler called by HCI 281 */ 282 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 283 } 284 285 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 286 hci_connection_t * connection = hci_connection_for_handle(handle); 287 if (!connection) { 288 log_error("hci_number_outgoing_packets: connection for handle %u does not exist!", handle); 289 return 0; 290 } 291 return connection->num_acl_packets_sent; 292 } 293 294 uint8_t hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 295 296 int num_packets_sent_classic = 0; 297 int num_packets_sent_le = 0; 298 299 bd_addr_type_t address_type = BD_ADDR_TYPE_UNKNOWN; 300 301 linked_item_t *it; 302 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 303 hci_connection_t * connection = (hci_connection_t *) it; 304 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 305 num_packets_sent_classic += connection->num_acl_packets_sent; 306 } else { 307 num_packets_sent_le += connection->num_acl_packets_sent; 308 } 309 // ignore connections that are not open, e.g., in state RECEIVED_DISCONNECTION_COMPLETE 310 if (connection->con_handle == con_handle && connection->state == OPEN){ 311 address_type = connection->address_type; 312 } 313 } 314 315 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 316 int free_slots_le = 0; 317 318 if (free_slots_classic < 0){ 319 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 320 return 0; 321 } 322 323 if (hci_stack->le_acl_packets_total_num){ 324 // if we have LE slots, they are used 325 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 326 if (free_slots_le < 0){ 327 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 328 return 0; 329 } 330 } else { 331 // otherwise, classic slots are used for LE, too 332 free_slots_classic -= num_packets_sent_le; 333 if (free_slots_classic < 0){ 334 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 335 return 0; 336 } 337 } 338 339 switch (address_type){ 340 case BD_ADDR_TYPE_UNKNOWN: 341 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 342 return 0; 343 344 case BD_ADDR_TYPE_CLASSIC: 345 return free_slots_classic; 346 347 default: 348 if (hci_stack->le_acl_packets_total_num){ 349 return free_slots_le; 350 } 351 return free_slots_classic; 352 } 353 } 354 355 static int hci_number_free_sco_slots_for_handle(hci_con_handle_t handle){ 356 int num_sco_packets_sent = 0; 357 linked_item_t *it; 358 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 359 hci_connection_t * connection = (hci_connection_t *) it; 360 num_sco_packets_sent += connection->num_sco_packets_sent; 361 } 362 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 363 log_info("hci_number_free_sco_slots_for_handle: outgoing packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 364 return 0; 365 } 366 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 367 } 368 369 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 370 int hci_can_send_command_packet_now(void){ 371 if (hci_stack->hci_packet_buffer_reserved) return 0; 372 373 // check for async hci transport implementations 374 if (hci_stack->hci_transport->can_send_packet_now){ 375 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 376 return 0; 377 } 378 } 379 380 return hci_stack->num_cmd_packets > 0; 381 } 382 383 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 384 // check for async hci transport implementations 385 if (hci_stack->hci_transport->can_send_packet_now){ 386 if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){ 387 return 0; 388 } 389 } 390 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 391 } 392 393 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 394 if (hci_stack->hci_packet_buffer_reserved) return 0; 395 return hci_can_send_prepared_acl_packet_now(con_handle); 396 } 397 398 int hci_can_send_prepared_sco_packet_now(hci_con_handle_t con_handle){ 399 if (hci_stack->hci_transport->can_send_packet_now){ 400 if (!hci_stack->hci_transport->can_send_packet_now(HCI_SCO_DATA_PACKET)){ 401 return 0; 402 } 403 } 404 if (!hci_stack->synchronous_flow_control_enabled) return 1; 405 return hci_number_free_sco_slots_for_handle(con_handle) > 0; 406 } 407 408 int hci_can_send_sco_packet_now(hci_con_handle_t con_handle){ 409 if (hci_stack->hci_packet_buffer_reserved) return 0; 410 return hci_can_send_prepared_sco_packet_now(con_handle); 411 } 412 413 // used for internal checks in l2cap[-le].c 414 int hci_is_packet_buffer_reserved(void){ 415 return hci_stack->hci_packet_buffer_reserved; 416 } 417 418 // reserves outgoing packet buffer. @returns 1 if successful 419 int hci_reserve_packet_buffer(void){ 420 if (hci_stack->hci_packet_buffer_reserved) { 421 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 422 return 0; 423 } 424 hci_stack->hci_packet_buffer_reserved = 1; 425 return 1; 426 } 427 428 void hci_release_packet_buffer(void){ 429 hci_stack->hci_packet_buffer_reserved = 0; 430 } 431 432 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 433 static int hci_transport_synchronous(void){ 434 return hci_stack->hci_transport->can_send_packet_now == NULL; 435 } 436 437 uint16_t hci_max_acl_le_data_packet_length(void){ 438 return hci_stack->le_data_packets_length > 0 ? hci_stack->le_data_packets_length : hci_stack->acl_data_packet_length; 439 } 440 441 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 442 443 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 444 445 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 446 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 447 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 448 max_acl_data_packet_length = hci_stack->le_data_packets_length; 449 } 450 451 // testing: reduce buffer to minimum 452 // max_acl_data_packet_length = 52; 453 454 int err; 455 // multiple packets could be send on a synchronous HCI transport 456 while (1){ 457 458 // get current data 459 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 460 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 461 int more_fragments = 0; 462 463 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 464 if (current_acl_data_packet_length > max_acl_data_packet_length){ 465 more_fragments = 1; 466 current_acl_data_packet_length = max_acl_data_packet_length; 467 } 468 469 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 470 if (acl_header_pos > 0){ 471 uint16_t handle_and_flags = READ_BT_16(hci_stack->hci_packet_buffer, 0); 472 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 473 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 474 } 475 476 // update header len 477 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 478 479 // count packet 480 connection->num_acl_packets_sent++; 481 482 // send packet 483 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 484 const int size = current_acl_data_packet_length + 4; 485 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 486 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 487 488 // done yet? 489 if (!more_fragments) break; 490 491 // update start of next fragment to send 492 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 493 494 // can send more? 495 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 496 } 497 498 // done 499 hci_stack->acl_fragmentation_pos = 0; 500 hci_stack->acl_fragmentation_total_size = 0; 501 502 // release buffer now for synchronous transport 503 if (hci_transport_synchronous()){ 504 hci_release_packet_buffer(); 505 // notify upper stack that iit might be possible to send again 506 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 507 hci_stack->packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 508 } 509 510 return err; 511 } 512 513 // pre: caller has reserved the packet buffer 514 int hci_send_acl_packet_buffer(int size){ 515 516 // log_info("hci_send_acl_packet_buffer size %u", size); 517 518 if (!hci_stack->hci_packet_buffer_reserved) { 519 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 520 return 0; 521 } 522 523 uint8_t * packet = hci_stack->hci_packet_buffer; 524 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 525 526 // check for free places on Bluetooth module 527 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 528 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 529 hci_release_packet_buffer(); 530 return BTSTACK_ACL_BUFFERS_FULL; 531 } 532 533 hci_connection_t *connection = hci_connection_for_handle( con_handle); 534 if (!connection) { 535 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 536 hci_release_packet_buffer(); 537 return 0; 538 } 539 hci_connection_timestamp(connection); 540 541 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 542 543 // setup data 544 hci_stack->acl_fragmentation_total_size = size; 545 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 546 547 return hci_send_acl_packet_fragments(connection); 548 } 549 550 // pre: caller has reserved the packet buffer 551 int hci_send_sco_packet_buffer(int size){ 552 553 // log_info("hci_send_acl_packet_buffer size %u", size); 554 555 if (!hci_stack->hci_packet_buffer_reserved) { 556 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 557 return 0; 558 } 559 560 uint8_t * packet = hci_stack->hci_packet_buffer; 561 562 // skip checks in loopback mode 563 if (!hci_stack->loopback_mode){ 564 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 565 566 // check for free places on Bluetooth module 567 if (!hci_can_send_prepared_sco_packet_now(con_handle)) { 568 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 569 hci_release_packet_buffer(); 570 return BTSTACK_ACL_BUFFERS_FULL; 571 } 572 573 // track send packet in connection struct 574 hci_connection_t *connection = hci_connection_for_handle( con_handle); 575 if (!connection) { 576 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 577 hci_release_packet_buffer(); 578 return 0; 579 } 580 connection->num_sco_packets_sent++; 581 } 582 583 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 584 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 585 586 if (hci_transport_synchronous()){ 587 hci_release_packet_buffer(); 588 // notify upper stack that iit might be possible to send again 589 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 590 hci_stack->packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 591 } 592 593 return err; 594 } 595 596 static void acl_handler(uint8_t *packet, int size){ 597 598 // log_info("acl_handler: size %u", size); 599 600 // get info 601 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 602 hci_connection_t *conn = hci_connection_for_handle(con_handle); 603 uint8_t acl_flags = READ_ACL_FLAGS(packet); 604 uint16_t acl_length = READ_ACL_LENGTH(packet); 605 606 // ignore non-registered handle 607 if (!conn){ 608 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 609 return; 610 } 611 612 // assert packet is complete 613 if (acl_length + 4 != size){ 614 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 615 return; 616 } 617 618 // update idle timestamp 619 hci_connection_timestamp(conn); 620 621 // handle different packet types 622 switch (acl_flags & 0x03) { 623 624 case 0x01: // continuation fragment 625 626 // sanity checks 627 if (conn->acl_recombination_pos == 0) { 628 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 629 return; 630 } 631 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 632 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 633 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 634 conn->acl_recombination_pos = 0; 635 return; 636 } 637 638 // append fragment payload (header already stored) 639 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 640 conn->acl_recombination_pos += acl_length; 641 642 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 643 // conn->acl_recombination_pos, conn->acl_recombination_length); 644 645 // forward complete L2CAP packet if complete. 646 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 647 648 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, &conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 649 // reset recombination buffer 650 conn->acl_recombination_length = 0; 651 conn->acl_recombination_pos = 0; 652 } 653 break; 654 655 case 0x02: { // first fragment 656 657 // sanity check 658 if (conn->acl_recombination_pos) { 659 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 660 conn->acl_recombination_pos = 0; 661 } 662 663 // peek into L2CAP packet! 664 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 665 666 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 667 668 // compare fragment size to L2CAP packet size 669 if (acl_length >= l2cap_length + 4){ 670 671 // forward fragment as L2CAP packet 672 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 673 674 } else { 675 676 if (acl_length > HCI_ACL_BUFFER_SIZE){ 677 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 678 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 679 return; 680 } 681 682 // store first fragment and tweak acl length for complete package 683 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 684 conn->acl_recombination_pos = acl_length + 4; 685 conn->acl_recombination_length = l2cap_length; 686 bt_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 687 } 688 break; 689 690 } 691 default: 692 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 693 return; 694 } 695 696 // execute main loop 697 hci_run(); 698 } 699 700 static void hci_shutdown_connection(hci_connection_t *conn){ 701 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 702 703 run_loop_remove_timer(&conn->timeout); 704 705 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 706 btstack_memory_hci_connection_free( conn ); 707 708 // now it's gone 709 hci_emit_nr_connections_changed(); 710 } 711 712 static const uint16_t packet_type_sizes[] = { 713 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 714 HCI_ACL_DH1_SIZE, 0, 0, 0, 715 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 716 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 717 }; 718 static const uint8_t packet_type_feature_requirement_bit[] = { 719 0, // 3 slot packets 720 1, // 5 slot packets 721 25, // EDR 2 mpbs 722 26, // EDR 3 mbps 723 39, // 3 slot EDR packts 724 40, // 5 slot EDR packet 725 }; 726 static const uint16_t packet_type_feature_packet_mask[] = { 727 0x0f00, // 3 slot packets 728 0xf000, // 5 slot packets 729 0x1102, // EDR 2 mpbs 730 0x2204, // EDR 3 mbps 731 0x0300, // 3 slot EDR packts 732 0x3000, // 5 slot EDR packet 733 }; 734 735 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 736 // enable packet types based on size 737 uint16_t packet_types = 0; 738 unsigned int i; 739 for (i=0;i<16;i++){ 740 if (packet_type_sizes[i] == 0) continue; 741 if (packet_type_sizes[i] <= buffer_size){ 742 packet_types |= 1 << i; 743 } 744 } 745 // disable packet types due to missing local supported features 746 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 747 int bit_idx = packet_type_feature_requirement_bit[i]; 748 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 749 if (feature_set) continue; 750 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 751 packet_types &= ~packet_type_feature_packet_mask[i]; 752 } 753 // flip bits for "may not be used" 754 packet_types ^= 0x3306; 755 return packet_types; 756 } 757 758 uint16_t hci_usable_acl_packet_types(void){ 759 return hci_stack->packet_types; 760 } 761 762 uint8_t* hci_get_outgoing_packet_buffer(void){ 763 // hci packet buffer is >= acl data packet length 764 return hci_stack->hci_packet_buffer; 765 } 766 767 uint16_t hci_max_acl_data_packet_length(void){ 768 return hci_stack->acl_data_packet_length; 769 } 770 771 int hci_non_flushable_packet_boundary_flag_supported(void){ 772 // No. 54, byte 6, bit 6 773 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 774 } 775 776 static int hci_ssp_supported(void){ 777 // No. 51, byte 6, bit 3 778 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 779 } 780 781 static int hci_classic_supported(void){ 782 // No. 37, byte 4, bit 5, = No BR/EDR Support 783 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 784 } 785 786 static int hci_le_supported(void){ 787 #ifdef HAVE_BLE 788 // No. 37, byte 4, bit 6 = LE Supported (Controller) 789 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 790 #else 791 return 0; 792 #endif 793 } 794 795 // get addr type and address used in advertisement packets 796 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t addr){ 797 *addr_type = hci_stack->adv_addr_type; 798 if (hci_stack->adv_addr_type){ 799 memcpy(addr, hci_stack->adv_address, 6); 800 } else { 801 memcpy(addr, hci_stack->local_bd_addr, 6); 802 } 803 } 804 805 #ifdef HAVE_BLE 806 void le_handle_advertisement_report(uint8_t *packet, int size){ 807 int offset = 3; 808 int num_reports = packet[offset]; 809 offset += 1; 810 811 int i; 812 log_info("HCI: handle adv report with num reports: %d", num_reports); 813 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 814 for (i=0; i<num_reports;i++){ 815 uint8_t data_length = packet[offset + 8]; 816 uint8_t event_size = 10 + data_length; 817 int pos = 0; 818 event[pos++] = GAP_LE_ADVERTISING_REPORT; 819 event[pos++] = event_size; 820 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 821 offset += 8; 822 pos += 8; 823 event[pos++] = packet[offset + 1 + data_length]; // rssi 824 event[pos++] = packet[offset++]; //data_length; 825 memcpy(&event[pos], &packet[offset], data_length); 826 pos += data_length; 827 offset += data_length + 1; // rssi 828 hci_dump_packet( HCI_EVENT_PACKET, 0, event, pos); 829 hci_stack->packet_handler(HCI_EVENT_PACKET, event, pos); 830 } 831 } 832 #endif 833 834 static void hci_initialization_timeout_handler(timer_source_t * ds){ 835 switch (hci_stack->substate){ 836 case HCI_INIT_W4_SEND_RESET: 837 log_info("Resend HCI Reset"); 838 hci_stack->substate = HCI_INIT_SEND_RESET; 839 hci_stack->num_cmd_packets = 1; 840 hci_run(); 841 break; 842 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 843 log_info("Resend HCI Reset - CSR Warm Boot"); 844 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 845 hci_stack->num_cmd_packets = 1; 846 hci_run(); 847 break; 848 case HCI_INIT_W4_SEND_BAUD_CHANGE: 849 log_info("Local baud rate change to %"PRIu32, ((hci_uart_config_t *)hci_stack->config)->baudrate_main); 850 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 851 break; 852 default: 853 break; 854 } 855 } 856 857 static void hci_initializing_next_state(void){ 858 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 859 } 860 861 // assumption: hci_can_send_command_packet_now() == true 862 static void hci_initializing_run(void){ 863 log_info("hci_initializing_run: substate %u", hci_stack->substate); 864 switch (hci_stack->substate){ 865 case HCI_INIT_SEND_RESET: 866 hci_state_reset(); 867 868 #ifndef USE_BLUETOOL 869 // prepare reset if command complete not received in 100ms 870 run_loop_set_timer(&hci_stack->timeout, 100); 871 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 872 run_loop_add_timer(&hci_stack->timeout); 873 #endif 874 // send command 875 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 876 hci_send_cmd(&hci_reset); 877 break; 878 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 879 hci_send_cmd(&hci_read_local_version_information); 880 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 881 break; 882 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 883 hci_state_reset(); 884 // prepare reset if command complete not received in 100ms 885 run_loop_set_timer(&hci_stack->timeout, 100); 886 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 887 run_loop_add_timer(&hci_stack->timeout); 888 // send command 889 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 890 hci_send_cmd(&hci_reset); 891 break; 892 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 893 hci_state_reset(); 894 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 895 hci_send_cmd(&hci_reset); 896 break; 897 case HCI_INIT_SET_BD_ADDR: 898 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 899 hci_stack->control->set_bd_addr_cmd(hci_stack->config, hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 900 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 901 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 902 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 903 break; 904 case HCI_INIT_SEND_BAUD_CHANGE: 905 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 906 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 907 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 908 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 909 // STLC25000D: baudrate change happens within 0.5 s after command was send, 910 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 911 if (hci_stack->manufacturer == 0x0030){ 912 run_loop_set_timer(&hci_stack->timeout, 100); 913 run_loop_add_timer(&hci_stack->timeout); 914 } 915 break; 916 case HCI_INIT_CUSTOM_INIT: 917 log_info("Custom init"); 918 // Custom initialization 919 if (hci_stack->control && hci_stack->control->next_cmd){ 920 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 921 if (valid_cmd){ 922 int size = 3 + hci_stack->hci_packet_buffer[2]; 923 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 924 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 925 switch (valid_cmd) { 926 case 1: 927 default: 928 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 929 break; 930 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 931 log_info("CSR Warm Boot"); 932 run_loop_set_timer(&hci_stack->timeout, 100); 933 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 934 run_loop_add_timer(&hci_stack->timeout); 935 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 936 break; 937 } 938 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 939 break; 940 } 941 log_info("hci_run: init script done"); 942 } 943 // otherwise continue 944 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 945 hci_send_cmd(&hci_read_bd_addr); 946 break; 947 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 948 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 949 hci_send_cmd(&hci_read_local_supported_commands); 950 break; 951 case HCI_INIT_READ_BUFFER_SIZE: 952 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 953 hci_send_cmd(&hci_read_buffer_size); 954 break; 955 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES: 956 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATUES; 957 hci_send_cmd(&hci_read_local_supported_features); 958 break; 959 case HCI_INIT_SET_EVENT_MASK: 960 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 961 if (hci_le_supported()){ 962 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 963 } else { 964 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 965 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 966 } 967 break; 968 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 969 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 970 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 971 break; 972 case HCI_INIT_WRITE_PAGE_TIMEOUT: 973 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 974 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 975 break; 976 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 977 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 978 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 979 break; 980 case HCI_INIT_WRITE_LOCAL_NAME: 981 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 982 if (hci_stack->local_name){ 983 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 984 } else { 985 char hostname[30]; 986 #ifdef EMBEDDED 987 // BTstack-11:22:33:44:55:66 988 strcpy(hostname, "BTstack "); 989 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 990 log_info("---> Name %s", hostname); 991 #else 992 // hostname for POSIX systems 993 gethostname(hostname, 30); 994 hostname[29] = '\0'; 995 #endif 996 hci_send_cmd(&hci_write_local_name, hostname); 997 } 998 break; 999 case HCI_INIT_WRITE_SCAN_ENABLE: 1000 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1001 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1002 break; 1003 #ifdef HAVE_BLE 1004 // LE INIT 1005 case HCI_INIT_LE_READ_BUFFER_SIZE: 1006 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1007 hci_send_cmd(&hci_le_read_buffer_size); 1008 break; 1009 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1010 // LE Supported Host = 1, Simultaneous Host = 0 1011 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1012 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1013 break; 1014 case HCI_INIT_READ_WHITE_LIST_SIZE: 1015 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1016 hci_send_cmd(&hci_le_read_white_list_size); 1017 break; 1018 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1019 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1020 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1021 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1022 break; 1023 #endif 1024 // DONE 1025 case HCI_INIT_DONE: 1026 // done. 1027 hci_stack->state = HCI_STATE_WORKING; 1028 hci_emit_state(); 1029 return; 1030 default: 1031 return; 1032 } 1033 } 1034 1035 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1036 uint8_t command_completed = 0; 1037 1038 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 1039 uint16_t opcode = READ_BT_16(packet,3); 1040 if (opcode == hci_stack->last_cmd_opcode){ 1041 command_completed = 1; 1042 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1043 } else { 1044 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1045 } 1046 } 1047 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 1048 uint8_t status = packet[2]; 1049 uint16_t opcode = READ_BT_16(packet,4); 1050 if (opcode == hci_stack->last_cmd_opcode){ 1051 if (status){ 1052 command_completed = 1; 1053 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1054 } else { 1055 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1056 } 1057 } else { 1058 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1059 } 1060 } 1061 // Vendor == CSR 1062 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1063 // TODO: track actual command 1064 command_completed = 1; 1065 } 1066 1067 if (!command_completed) return; 1068 1069 int need_baud_change = hci_stack->config 1070 && hci_stack->control 1071 && hci_stack->control->baudrate_cmd 1072 && hci_stack->hci_transport->set_baudrate 1073 && ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1074 1075 int need_addr_change = hci_stack->custom_bd_addr_set 1076 && hci_stack->control 1077 && hci_stack->control->set_bd_addr_cmd; 1078 1079 switch(hci_stack->substate){ 1080 case HCI_INIT_W4_SEND_RESET: 1081 run_loop_remove_timer(&hci_stack->timeout); 1082 break; 1083 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1084 if (need_addr_change){ 1085 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1086 return; 1087 } 1088 // skipping addr change 1089 if (need_baud_change){ 1090 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1091 return; 1092 } 1093 // also skip baud change 1094 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1095 return; 1096 case HCI_INIT_W4_SET_BD_ADDR: 1097 // for STLC2500D, bd addr change only gets active after sending reset command 1098 if (hci_stack->manufacturer == 0x0030){ 1099 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1100 return; 1101 } 1102 // skipping warm boot on STLC2500D 1103 if (need_baud_change){ 1104 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1105 return; 1106 } 1107 // skipping baud change 1108 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1109 return; 1110 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1111 if (need_baud_change){ 1112 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1113 return; 1114 } 1115 // skipping baud change 1116 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1117 return; 1118 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1119 // for STLC2500D, baud rate change already happened. 1120 // for CC256x, baud rate gets changed now 1121 if (hci_stack->manufacturer != 0x0030){ 1122 uint32_t new_baud = ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1123 log_info("Local baud rate change to %"PRIu32, new_baud); 1124 hci_stack->hci_transport->set_baudrate(new_baud); 1125 } 1126 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1127 return; 1128 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1129 run_loop_remove_timer(&hci_stack->timeout); 1130 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1131 return; 1132 case HCI_INIT_W4_CUSTOM_INIT: 1133 // repeat custom init 1134 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1135 return; 1136 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1137 // skip read buffer size if not supported 1138 if (hci_stack->local_supported_commands[0] & 0x01) break; 1139 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES; 1140 return; 1141 case HCI_INIT_W4_SET_EVENT_MASK: 1142 // skip Classic init commands for LE only chipsets 1143 if (!hci_classic_supported()){ 1144 if (hci_le_supported()){ 1145 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1146 return; 1147 } else { 1148 log_error("Neither BR/EDR nor LE supported"); 1149 hci_stack->substate = HCI_INIT_DONE; // skip all 1150 return; 1151 } 1152 } 1153 if (!hci_ssp_supported()){ 1154 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1155 return; 1156 } 1157 break; 1158 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1159 // skip write le host if not supported (e.g. on LE only EM9301) 1160 if (hci_stack->local_supported_commands[0] & 0x02) break; 1161 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1162 return; 1163 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1164 if (!hci_le_supported()){ 1165 // SKIP LE init for Classic only configuration 1166 hci_stack->substate = HCI_INIT_DONE; 1167 return; 1168 } 1169 default: 1170 break; 1171 } 1172 hci_initializing_next_state(); 1173 } 1174 1175 1176 // avoid huge local variables 1177 #ifndef EMBEDDED 1178 static device_name_t device_name; 1179 #endif 1180 static void event_handler(uint8_t *packet, int size){ 1181 1182 uint16_t event_length = packet[1]; 1183 1184 // assert packet is complete 1185 if (size != event_length + 2){ 1186 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1187 return; 1188 } 1189 1190 bd_addr_t addr; 1191 bd_addr_type_t addr_type; 1192 uint8_t link_type; 1193 hci_con_handle_t handle; 1194 hci_connection_t * conn; 1195 int i; 1196 1197 // log_info("HCI:EVENT:%02x", packet[0]); 1198 1199 switch (packet[0]) { 1200 1201 case HCI_EVENT_COMMAND_COMPLETE: 1202 // get num cmd packets 1203 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1204 hci_stack->num_cmd_packets = packet[2]; 1205 1206 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 1207 // from offset 5 1208 // status 1209 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1210 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 1211 hci_stack->sco_data_packet_length = packet[8]; 1212 hci_stack->acl_packets_total_num = READ_BT_16(packet, 9); 1213 hci_stack->sco_packets_total_num = READ_BT_16(packet, 11); 1214 1215 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1216 // determine usable ACL payload size 1217 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1218 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1219 } 1220 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1221 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1222 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1223 } 1224 } 1225 #ifdef HAVE_BLE 1226 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 1227 hci_stack->le_data_packets_length = READ_BT_16(packet, 6); 1228 hci_stack->le_acl_packets_total_num = packet[8]; 1229 // determine usable ACL payload size 1230 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1231 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1232 } 1233 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1234 } 1235 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_white_list_size)){ 1236 hci_stack->le_whitelist_capacity = READ_BT_16(packet, 6); 1237 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1238 } 1239 #endif 1240 // Dump local address 1241 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 1242 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 1243 log_info("Local Address, Status: 0x%02x: Addr: %s", 1244 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1245 } 1246 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1247 hci_emit_discoverable_enabled(hci_stack->discoverable); 1248 } 1249 // Note: HCI init checks 1250 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 1251 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1252 1253 // determine usable ACL packet types based on host buffer size and supported features 1254 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1255 log_info("packet types %04x", hci_stack->packet_types); 1256 1257 // Classic/LE 1258 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1259 } 1260 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_version_information)){ 1261 // hci_stack->hci_version = READ_BT_16(packet, 4); 1262 // hci_stack->hci_revision = READ_BT_16(packet, 6); 1263 // hci_stack->lmp_version = READ_BT_16(packet, 8); 1264 hci_stack->manufacturer = READ_BT_16(packet, 10); 1265 // hci_stack->lmp_subversion = READ_BT_16(packet, 12); 1266 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1267 } 1268 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_commands)){ 1269 hci_stack->local_supported_commands[0] = 1270 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1271 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1272 } 1273 break; 1274 1275 case HCI_EVENT_COMMAND_STATUS: 1276 // get num cmd packets 1277 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1278 hci_stack->num_cmd_packets = packet[3]; 1279 break; 1280 1281 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1282 int offset = 3; 1283 for (i=0; i<packet[2];i++){ 1284 handle = READ_BT_16(packet, offset); 1285 offset += 2; 1286 uint16_t num_packets = READ_BT_16(packet, offset); 1287 offset += 2; 1288 1289 conn = hci_connection_for_handle(handle); 1290 if (!conn){ 1291 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1292 continue; 1293 } 1294 1295 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1296 if (conn->num_sco_packets_sent >= num_packets){ 1297 conn->num_sco_packets_sent -= num_packets; 1298 } else { 1299 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1300 conn->num_sco_packets_sent = 0; 1301 } 1302 1303 } else { 1304 if (conn->num_acl_packets_sent >= num_packets){ 1305 conn->num_acl_packets_sent -= num_packets; 1306 } else { 1307 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1308 conn->num_acl_packets_sent = 0; 1309 } 1310 } 1311 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1312 } 1313 break; 1314 } 1315 case HCI_EVENT_CONNECTION_REQUEST: 1316 bt_flip_addr(addr, &packet[2]); 1317 // TODO: eval COD 8-10 1318 link_type = packet[11]; 1319 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1320 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1321 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1322 if (!conn) { 1323 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1324 } 1325 if (!conn) { 1326 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1327 hci_stack->decline_reason = 0x0d; 1328 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1329 break; 1330 } 1331 conn->role = HCI_ROLE_SLAVE; 1332 conn->state = RECEIVED_CONNECTION_REQUEST; 1333 hci_run(); 1334 break; 1335 1336 case HCI_EVENT_CONNECTION_COMPLETE: 1337 // Connection management 1338 bt_flip_addr(addr, &packet[5]); 1339 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1340 addr_type = BD_ADDR_TYPE_CLASSIC; 1341 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1342 if (conn) { 1343 if (!packet[2]){ 1344 conn->state = OPEN; 1345 conn->con_handle = READ_BT_16(packet, 3); 1346 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1347 1348 // restart timer 1349 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1350 run_loop_add_timer(&conn->timeout); 1351 1352 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1353 1354 hci_emit_nr_connections_changed(); 1355 } else { 1356 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1357 uint8_t status = packet[2]; 1358 bd_addr_t bd_address; 1359 memcpy(&bd_address, conn->address, 6); 1360 1361 // connection failed, remove entry 1362 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1363 btstack_memory_hci_connection_free( conn ); 1364 1365 // notify client if dedicated bonding 1366 if (notify_dedicated_bonding_failed){ 1367 log_info("hci notify_dedicated_bonding_failed"); 1368 hci_emit_dedicated_bonding_result(bd_address, status); 1369 } 1370 1371 // if authentication error, also delete link key 1372 if (packet[2] == 0x05) { 1373 hci_drop_link_key_for_bd_addr(addr); 1374 } 1375 } 1376 } 1377 break; 1378 1379 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1380 bt_flip_addr(addr, &packet[5]); 1381 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1382 if (packet[2]){ 1383 // connection failed 1384 break; 1385 } 1386 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1387 if (!conn) { 1388 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1389 } 1390 if (!conn) { 1391 break; 1392 } 1393 conn->state = OPEN; 1394 conn->con_handle = READ_BT_16(packet, 3); 1395 break; 1396 1397 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1398 handle = READ_BT_16(packet, 3); 1399 conn = hci_connection_for_handle(handle); 1400 if (!conn) break; 1401 if (!packet[2]){ 1402 uint8_t * features = &packet[5]; 1403 if (features[6] & (1 << 3)){ 1404 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1405 } 1406 if (features[3] & (1<<7)){ 1407 conn->remote_supported_feature_eSCO = 1; 1408 } 1409 } 1410 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1411 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1412 if (conn->bonding_flags & BONDING_DEDICATED){ 1413 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1414 } 1415 break; 1416 1417 case HCI_EVENT_LINK_KEY_REQUEST: 1418 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1419 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1420 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1421 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1422 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1423 hci_run(); 1424 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1425 return; 1426 1427 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1428 bt_flip_addr(addr, &packet[2]); 1429 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1430 if (!conn) break; 1431 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1432 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1433 // Change Connection Encryption keeps link key type 1434 if (link_key_type != CHANGED_COMBINATION_KEY){ 1435 conn->link_key_type = link_key_type; 1436 } 1437 if (!hci_stack->remote_device_db) break; 1438 hci_stack->remote_device_db->put_link_key(addr, &packet[8], conn->link_key_type); 1439 // still forward event to allow dismiss of pairing dialog 1440 break; 1441 } 1442 1443 case HCI_EVENT_PIN_CODE_REQUEST: 1444 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1445 // non-bondable mode: pin code negative reply will be sent 1446 if (!hci_stack->bondable){ 1447 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1448 hci_run(); 1449 return; 1450 } 1451 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1452 if (!hci_stack->remote_device_db) break; 1453 bt_flip_addr(addr, &packet[2]); 1454 hci_stack->remote_device_db->delete_link_key(addr); 1455 break; 1456 1457 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1458 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1459 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1460 break; 1461 1462 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1463 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1464 if (!hci_stack->ssp_auto_accept) break; 1465 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1466 break; 1467 1468 case HCI_EVENT_USER_PASSKEY_REQUEST: 1469 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1470 if (!hci_stack->ssp_auto_accept) break; 1471 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1472 break; 1473 1474 case HCI_EVENT_ENCRYPTION_CHANGE: 1475 handle = READ_BT_16(packet, 3); 1476 conn = hci_connection_for_handle(handle); 1477 if (!conn) break; 1478 if (packet[2] == 0) { 1479 if (packet[5]){ 1480 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1481 } else { 1482 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1483 } 1484 } 1485 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1486 break; 1487 1488 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1489 handle = READ_BT_16(packet, 3); 1490 conn = hci_connection_for_handle(handle); 1491 if (!conn) break; 1492 1493 // dedicated bonding: send result and disconnect 1494 if (conn->bonding_flags & BONDING_DEDICATED){ 1495 conn->bonding_flags &= ~BONDING_DEDICATED; 1496 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1497 conn->bonding_status = packet[2]; 1498 break; 1499 } 1500 1501 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1502 // link key sufficient for requested security 1503 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1504 break; 1505 } 1506 // not enough 1507 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1508 break; 1509 1510 #ifndef EMBEDDED 1511 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1512 if (!hci_stack->remote_device_db) break; 1513 if (packet[2]) break; // status not ok 1514 bt_flip_addr(addr, &packet[3]); 1515 // fix for invalid remote names - terminate on 0xff 1516 for (i=0; i<248;i++){ 1517 if (packet[9+i] == 0xff){ 1518 packet[9+i] = 0; 1519 break; 1520 } 1521 } 1522 memset(&device_name, 0, sizeof(device_name_t)); 1523 strncpy((char*) device_name, (char*) &packet[9], 248); 1524 hci_stack->remote_device_db->put_name(addr, &device_name); 1525 break; 1526 1527 case HCI_EVENT_INQUIRY_RESULT: 1528 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1529 if (!hci_stack->remote_device_db) break; 1530 // first send inq result packet 1531 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1532 // then send cached remote names 1533 int offset = 3; 1534 for (i=0; i<packet[2];i++){ 1535 bt_flip_addr(addr, &packet[offset]); 1536 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1537 if (hci_stack->remote_device_db->get_name(addr, &device_name)){ 1538 hci_emit_remote_name_cached(addr, &device_name); 1539 } 1540 } 1541 return; 1542 } 1543 #endif 1544 1545 // HCI_EVENT_DISCONNECTION_COMPLETE 1546 // has been split, to first notify stack before shutting connection down 1547 // see end of function, too. 1548 case HCI_EVENT_DISCONNECTION_COMPLETE: 1549 if (packet[2]) break; // status != 0 1550 handle = READ_BT_16(packet, 3); 1551 conn = hci_connection_for_handle(handle); 1552 if (!conn) break; // no conn struct anymore 1553 // re-enable advertisements for le connections if active 1554 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1555 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1556 } 1557 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1558 break; 1559 1560 case HCI_EVENT_HARDWARE_ERROR: 1561 if (hci_stack->hardware_error_callback){ 1562 (*hci_stack->hardware_error_callback)(); 1563 } else if(hci_stack->control && hci_stack->control->hw_error){ 1564 (*hci_stack->control->hw_error)(); 1565 } else { 1566 // if no special requests, just reboot stack 1567 hci_power_control_off(); 1568 hci_power_control_on(); 1569 } 1570 break; 1571 1572 case HCI_EVENT_ROLE_CHANGE: 1573 if (packet[2]) break; // status != 0 1574 handle = READ_BT_16(packet, 3); 1575 conn = hci_connection_for_handle(handle); 1576 if (!conn) break; // no conn 1577 conn->role = packet[9]; 1578 break; 1579 1580 case DAEMON_EVENT_HCI_PACKET_SENT: 1581 // release packet buffer only for asynchronous transport and if there are not further fragements 1582 if (hci_transport_synchronous()) { 1583 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1584 return; // instead of break: to avoid re-entering hci_run() 1585 } 1586 if (hci_stack->acl_fragmentation_total_size) break; 1587 hci_release_packet_buffer(); 1588 break; 1589 1590 #ifdef HAVE_BLE 1591 case HCI_EVENT_LE_META: 1592 switch (packet[2]){ 1593 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1594 log_info("advertising report received"); 1595 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1596 le_handle_advertisement_report(packet, size); 1597 break; 1598 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1599 // Connection management 1600 bt_flip_addr(addr, &packet[8]); 1601 addr_type = (bd_addr_type_t)packet[7]; 1602 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1603 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1604 // if auto-connect, remove from whitelist in both roles 1605 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1606 hci_remove_from_whitelist(addr_type, addr); 1607 } 1608 // handle error: error is reported only to the initiator -> outgoing connection 1609 if (packet[3]){ 1610 // outgoing connection establishment is done 1611 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1612 // remove entry 1613 if (conn){ 1614 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1615 btstack_memory_hci_connection_free( conn ); 1616 } 1617 break; 1618 } 1619 // on success, both hosts receive connection complete event 1620 if (packet[6] == HCI_ROLE_MASTER){ 1621 // if we're master, it was an outgoing connection and we're done with it 1622 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1623 } else { 1624 // if we're slave, it was an incoming connection, advertisements have stopped 1625 hci_stack->le_advertisements_active = 0; 1626 } 1627 // LE connections are auto-accepted, so just create a connection if there isn't one already 1628 if (!conn){ 1629 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1630 } 1631 // no memory, sorry. 1632 if (!conn){ 1633 break; 1634 } 1635 1636 conn->state = OPEN; 1637 conn->role = packet[6]; 1638 conn->con_handle = READ_BT_16(packet, 4); 1639 1640 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1641 1642 // restart timer 1643 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1644 // run_loop_add_timer(&conn->timeout); 1645 1646 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1647 1648 hci_emit_nr_connections_changed(); 1649 break; 1650 1651 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1652 1653 default: 1654 break; 1655 } 1656 break; 1657 #endif 1658 default: 1659 break; 1660 } 1661 1662 // handle BT initialization 1663 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1664 hci_initializing_event_handler(packet, size); 1665 } 1666 1667 // help with BT sleep 1668 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1669 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1670 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1671 hci_initializing_next_state(); 1672 } 1673 1674 // notify upper stack 1675 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1676 1677 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1678 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1679 if (!packet[2]){ 1680 handle = READ_BT_16(packet, 3); 1681 hci_connection_t * aConn = hci_connection_for_handle(handle); 1682 if (aConn) { 1683 uint8_t status = aConn->bonding_status; 1684 uint16_t flags = aConn->bonding_flags; 1685 bd_addr_t bd_address; 1686 memcpy(&bd_address, aConn->address, 6); 1687 hci_shutdown_connection(aConn); 1688 // connection struct is gone, don't access anymore 1689 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1690 hci_emit_dedicated_bonding_result(bd_address, status); 1691 } 1692 } 1693 } 1694 } 1695 1696 // execute main loop 1697 hci_run(); 1698 } 1699 1700 static void sco_handler(uint8_t * packet, uint16_t size){ 1701 if (!hci_stack->sco_packet_handler) return; 1702 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, packet, size); 1703 } 1704 1705 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1706 hci_dump_packet(packet_type, 1, packet, size); 1707 switch (packet_type) { 1708 case HCI_EVENT_PACKET: 1709 event_handler(packet, size); 1710 break; 1711 case HCI_ACL_DATA_PACKET: 1712 acl_handler(packet, size); 1713 break; 1714 case HCI_SCO_DATA_PACKET: 1715 sco_handler(packet, size); 1716 default: 1717 break; 1718 } 1719 } 1720 1721 /** Register HCI packet handlers */ 1722 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1723 hci_stack->packet_handler = handler; 1724 } 1725 1726 /** 1727 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1728 */ 1729 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1730 hci_stack->sco_packet_handler = handler; 1731 } 1732 1733 static void hci_state_reset(void){ 1734 // no connections yet 1735 hci_stack->connections = NULL; 1736 1737 // keep discoverable/connectable as this has been requested by the client(s) 1738 // hci_stack->discoverable = 0; 1739 // hci_stack->connectable = 0; 1740 // hci_stack->bondable = 1; 1741 1742 // buffer is free 1743 hci_stack->hci_packet_buffer_reserved = 0; 1744 1745 // no pending cmds 1746 hci_stack->decline_reason = 0; 1747 hci_stack->new_scan_enable_value = 0xff; 1748 1749 // LE 1750 hci_stack->adv_addr_type = 0; 1751 memset(hci_stack->adv_address, 0, 6); 1752 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1753 hci_stack->le_scan_type = 0xff; 1754 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1755 hci_stack->le_whitelist = 0; 1756 hci_stack->le_whitelist_capacity = 0; 1757 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1758 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1759 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1760 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1761 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1762 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1763 } 1764 1765 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1766 1767 #ifdef HAVE_MALLOC 1768 if (!hci_stack) { 1769 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1770 } 1771 #else 1772 hci_stack = &hci_stack_static; 1773 #endif 1774 memset(hci_stack, 0, sizeof(hci_stack_t)); 1775 1776 // reference to use transport layer implementation 1777 hci_stack->hci_transport = transport; 1778 1779 // references to used control implementation 1780 hci_stack->control = control; 1781 1782 // reference to used config 1783 hci_stack->config = config; 1784 1785 // higher level handler 1786 hci_stack->packet_handler = dummy_handler; 1787 1788 // store and open remote device db 1789 hci_stack->remote_device_db = remote_device_db; 1790 if (hci_stack->remote_device_db) { 1791 hci_stack->remote_device_db->open(); 1792 } 1793 1794 // max acl payload size defined in config.h 1795 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1796 1797 // register packet handlers with transport 1798 transport->register_packet_handler(&packet_handler); 1799 1800 hci_stack->state = HCI_STATE_OFF; 1801 1802 // class of device 1803 hci_stack->class_of_device = 0x007a020c; // Smartphone 1804 1805 // bondable by default 1806 hci_stack->bondable = 1; 1807 1808 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1809 hci_stack->ssp_enable = 1; 1810 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1811 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1812 hci_stack->ssp_auto_accept = 1; 1813 1814 // voice setting - signed 8 bit pcm data with CVSD over the air 1815 hci_stack->sco_voice_setting = 0x40; 1816 1817 hci_state_reset(); 1818 } 1819 1820 void hci_close(void){ 1821 // close remote device db 1822 if (hci_stack->remote_device_db) { 1823 hci_stack->remote_device_db->close(); 1824 } 1825 while (hci_stack->connections) { 1826 // cancel all l2cap connections 1827 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1828 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1829 } 1830 hci_power_control(HCI_POWER_OFF); 1831 1832 #ifdef HAVE_MALLOC 1833 free(hci_stack); 1834 #endif 1835 hci_stack = NULL; 1836 } 1837 1838 void hci_set_class_of_device(uint32_t class_of_device){ 1839 hci_stack->class_of_device = class_of_device; 1840 } 1841 1842 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1843 void hci_set_bd_addr(bd_addr_t addr){ 1844 memcpy(hci_stack->custom_bd_addr, addr, 6); 1845 hci_stack->custom_bd_addr_set = 1; 1846 } 1847 1848 void hci_disable_l2cap_timeout_check(void){ 1849 disable_l2cap_timeouts = 1; 1850 } 1851 // State-Module-Driver overview 1852 // state module low-level 1853 // HCI_STATE_OFF off close 1854 // HCI_STATE_INITIALIZING, on open 1855 // HCI_STATE_WORKING, on open 1856 // HCI_STATE_HALTING, on open 1857 // HCI_STATE_SLEEPING, off/sleep close 1858 // HCI_STATE_FALLING_ASLEEP on open 1859 1860 static int hci_power_control_on(void){ 1861 1862 // power on 1863 int err = 0; 1864 if (hci_stack->control && hci_stack->control->on){ 1865 err = (*hci_stack->control->on)(hci_stack->config); 1866 } 1867 if (err){ 1868 log_error( "POWER_ON failed"); 1869 hci_emit_hci_open_failed(); 1870 return err; 1871 } 1872 1873 // open low-level device 1874 err = hci_stack->hci_transport->open(hci_stack->config); 1875 if (err){ 1876 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1877 if (hci_stack->control && hci_stack->control->off){ 1878 (*hci_stack->control->off)(hci_stack->config); 1879 } 1880 hci_emit_hci_open_failed(); 1881 return err; 1882 } 1883 return 0; 1884 } 1885 1886 static void hci_power_control_off(void){ 1887 1888 log_info("hci_power_control_off"); 1889 1890 // close low-level device 1891 hci_stack->hci_transport->close(hci_stack->config); 1892 1893 log_info("hci_power_control_off - hci_transport closed"); 1894 1895 // power off 1896 if (hci_stack->control && hci_stack->control->off){ 1897 (*hci_stack->control->off)(hci_stack->config); 1898 } 1899 1900 log_info("hci_power_control_off - control closed"); 1901 1902 hci_stack->state = HCI_STATE_OFF; 1903 } 1904 1905 static void hci_power_control_sleep(void){ 1906 1907 log_info("hci_power_control_sleep"); 1908 1909 #if 0 1910 // don't close serial port during sleep 1911 1912 // close low-level device 1913 hci_stack->hci_transport->close(hci_stack->config); 1914 #endif 1915 1916 // sleep mode 1917 if (hci_stack->control && hci_stack->control->sleep){ 1918 (*hci_stack->control->sleep)(hci_stack->config); 1919 } 1920 1921 hci_stack->state = HCI_STATE_SLEEPING; 1922 } 1923 1924 static int hci_power_control_wake(void){ 1925 1926 log_info("hci_power_control_wake"); 1927 1928 // wake on 1929 if (hci_stack->control && hci_stack->control->wake){ 1930 (*hci_stack->control->wake)(hci_stack->config); 1931 } 1932 1933 #if 0 1934 // open low-level device 1935 int err = hci_stack->hci_transport->open(hci_stack->config); 1936 if (err){ 1937 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1938 if (hci_stack->control && hci_stack->control->off){ 1939 (*hci_stack->control->off)(hci_stack->config); 1940 } 1941 hci_emit_hci_open_failed(); 1942 return err; 1943 } 1944 #endif 1945 1946 return 0; 1947 } 1948 1949 static void hci_power_transition_to_initializing(void){ 1950 // set up state machine 1951 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1952 hci_stack->hci_packet_buffer_reserved = 0; 1953 hci_stack->state = HCI_STATE_INITIALIZING; 1954 hci_stack->substate = HCI_INIT_SEND_RESET; 1955 } 1956 1957 int hci_power_control(HCI_POWER_MODE power_mode){ 1958 1959 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 1960 1961 int err = 0; 1962 switch (hci_stack->state){ 1963 1964 case HCI_STATE_OFF: 1965 switch (power_mode){ 1966 case HCI_POWER_ON: 1967 err = hci_power_control_on(); 1968 if (err) { 1969 log_error("hci_power_control_on() error %u", err); 1970 return err; 1971 } 1972 hci_power_transition_to_initializing(); 1973 break; 1974 case HCI_POWER_OFF: 1975 // do nothing 1976 break; 1977 case HCI_POWER_SLEEP: 1978 // do nothing (with SLEEP == OFF) 1979 break; 1980 } 1981 break; 1982 1983 case HCI_STATE_INITIALIZING: 1984 switch (power_mode){ 1985 case HCI_POWER_ON: 1986 // do nothing 1987 break; 1988 case HCI_POWER_OFF: 1989 // no connections yet, just turn it off 1990 hci_power_control_off(); 1991 break; 1992 case HCI_POWER_SLEEP: 1993 // no connections yet, just turn it off 1994 hci_power_control_sleep(); 1995 break; 1996 } 1997 break; 1998 1999 case HCI_STATE_WORKING: 2000 switch (power_mode){ 2001 case HCI_POWER_ON: 2002 // do nothing 2003 break; 2004 case HCI_POWER_OFF: 2005 // see hci_run 2006 hci_stack->state = HCI_STATE_HALTING; 2007 break; 2008 case HCI_POWER_SLEEP: 2009 // see hci_run 2010 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2011 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2012 break; 2013 } 2014 break; 2015 2016 case HCI_STATE_HALTING: 2017 switch (power_mode){ 2018 case HCI_POWER_ON: 2019 hci_power_transition_to_initializing(); 2020 break; 2021 case HCI_POWER_OFF: 2022 // do nothing 2023 break; 2024 case HCI_POWER_SLEEP: 2025 // see hci_run 2026 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2027 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2028 break; 2029 } 2030 break; 2031 2032 case HCI_STATE_FALLING_ASLEEP: 2033 switch (power_mode){ 2034 case HCI_POWER_ON: 2035 2036 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2037 // nothing to do, if H4 supports power management 2038 if (bt_control_iphone_power_management_enabled()){ 2039 hci_stack->state = HCI_STATE_INITIALIZING; 2040 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2041 break; 2042 } 2043 #endif 2044 hci_power_transition_to_initializing(); 2045 break; 2046 case HCI_POWER_OFF: 2047 // see hci_run 2048 hci_stack->state = HCI_STATE_HALTING; 2049 break; 2050 case HCI_POWER_SLEEP: 2051 // do nothing 2052 break; 2053 } 2054 break; 2055 2056 case HCI_STATE_SLEEPING: 2057 switch (power_mode){ 2058 case HCI_POWER_ON: 2059 2060 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2061 // nothing to do, if H4 supports power management 2062 if (bt_control_iphone_power_management_enabled()){ 2063 hci_stack->state = HCI_STATE_INITIALIZING; 2064 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2065 hci_update_scan_enable(); 2066 break; 2067 } 2068 #endif 2069 err = hci_power_control_wake(); 2070 if (err) return err; 2071 hci_power_transition_to_initializing(); 2072 break; 2073 case HCI_POWER_OFF: 2074 hci_stack->state = HCI_STATE_HALTING; 2075 break; 2076 case HCI_POWER_SLEEP: 2077 // do nothing 2078 break; 2079 } 2080 break; 2081 } 2082 2083 // create internal event 2084 hci_emit_state(); 2085 2086 // trigger next/first action 2087 hci_run(); 2088 2089 return 0; 2090 } 2091 2092 static void hci_update_scan_enable(void){ 2093 // 2 = page scan, 1 = inq scan 2094 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2095 hci_run(); 2096 } 2097 2098 void hci_discoverable_control(uint8_t enable){ 2099 if (enable) enable = 1; // normalize argument 2100 2101 if (hci_stack->discoverable == enable){ 2102 hci_emit_discoverable_enabled(hci_stack->discoverable); 2103 return; 2104 } 2105 2106 hci_stack->discoverable = enable; 2107 hci_update_scan_enable(); 2108 } 2109 2110 void hci_connectable_control(uint8_t enable){ 2111 if (enable) enable = 1; // normalize argument 2112 2113 // don't emit event 2114 if (hci_stack->connectable == enable) return; 2115 2116 hci_stack->connectable = enable; 2117 hci_update_scan_enable(); 2118 } 2119 2120 void hci_local_bd_addr(bd_addr_t address_buffer){ 2121 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2122 } 2123 2124 void hci_run(void){ 2125 2126 // log_info("hci_run: entered"); 2127 linked_item_t * it; 2128 2129 // send continuation fragments first, as they block the prepared packet buffer 2130 if (hci_stack->acl_fragmentation_total_size > 0) { 2131 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2132 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2133 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2134 if (connection) { 2135 hci_send_acl_packet_fragments(connection); 2136 return; 2137 } 2138 // connection gone -> discard further fragments 2139 hci_stack->acl_fragmentation_total_size = 0; 2140 hci_stack->acl_fragmentation_pos = 0; 2141 } 2142 } 2143 2144 if (!hci_can_send_command_packet_now()) return; 2145 2146 // global/non-connection oriented commands 2147 2148 // decline incoming connections 2149 if (hci_stack->decline_reason){ 2150 uint8_t reason = hci_stack->decline_reason; 2151 hci_stack->decline_reason = 0; 2152 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2153 return; 2154 } 2155 2156 // send scan enable 2157 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2158 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2159 hci_stack->new_scan_enable_value = 0xff; 2160 return; 2161 } 2162 2163 #ifdef HAVE_BLE 2164 if (hci_stack->state == HCI_STATE_WORKING){ 2165 // handle le scan 2166 switch(hci_stack->le_scanning_state){ 2167 case LE_START_SCAN: 2168 hci_stack->le_scanning_state = LE_SCANNING; 2169 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2170 return; 2171 2172 case LE_STOP_SCAN: 2173 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2174 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2175 return; 2176 default: 2177 break; 2178 } 2179 if (hci_stack->le_scan_type != 0xff){ 2180 // defaults: active scanning, accept all advertisement packets 2181 int scan_type = hci_stack->le_scan_type; 2182 hci_stack->le_scan_type = 0xff; 2183 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0); 2184 return; 2185 } 2186 // le advertisement control 2187 if (hci_stack->le_advertisements_todo){ 2188 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2189 } 2190 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2191 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2192 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2193 return; 2194 } 2195 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2196 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2197 hci_send_cmd(&hci_le_set_advertising_parameters, 2198 hci_stack->le_advertisements_interval_min, 2199 hci_stack->le_advertisements_interval_max, 2200 hci_stack->le_advertisements_type, 2201 hci_stack->le_advertisements_own_address_type, 2202 hci_stack->le_advertisements_direct_address_type, 2203 hci_stack->le_advertisements_direct_address, 2204 hci_stack->le_advertisements_channel_map, 2205 hci_stack->le_advertisements_filter_policy); 2206 return; 2207 } 2208 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_DATA){ 2209 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_DATA; 2210 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2211 hci_stack->le_advertisements_data); 2212 return; 2213 } 2214 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2215 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2216 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2217 return; 2218 } 2219 2220 // 2221 // LE Whitelist Management 2222 // 2223 2224 // check if whitelist needs modification 2225 linked_list_iterator_t lit; 2226 int modification_pending = 0; 2227 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2228 while (linked_list_iterator_has_next(&lit)){ 2229 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2230 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2231 modification_pending = 1; 2232 break; 2233 } 2234 } 2235 2236 if (modification_pending){ 2237 // stop connnecting if modification pending 2238 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2239 hci_send_cmd(&hci_le_create_connection_cancel); 2240 return; 2241 } 2242 2243 // add/remove entries 2244 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2245 while (linked_list_iterator_has_next(&lit)){ 2246 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2247 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2248 entry->state = LE_WHITELIST_ON_CONTROLLER; 2249 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2250 return; 2251 2252 } 2253 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2254 bd_addr_t address; 2255 bd_addr_type_t address_type = entry->address_type; 2256 memcpy(address, entry->address, 6); 2257 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2258 btstack_memory_whitelist_entry_free(entry); 2259 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2260 return; 2261 } 2262 } 2263 } 2264 2265 // start connecting 2266 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2267 !linked_list_empty(&hci_stack->le_whitelist)){ 2268 bd_addr_t null_addr; 2269 memset(null_addr, 0, 6); 2270 hci_send_cmd(&hci_le_create_connection, 2271 0x0060, // scan interval: 60 ms 2272 0x0030, // scan interval: 30 ms 2273 1, // use whitelist 2274 0, // peer address type 2275 null_addr, // peer bd addr 2276 hci_stack->adv_addr_type, // our addr type: 2277 0x0008, // conn interval min 2278 0x0018, // conn interval max 2279 0, // conn latency 2280 0x0048, // supervision timeout 2281 0x0001, // min ce length 2282 0x0001 // max ce length 2283 ); 2284 return; 2285 } 2286 } 2287 #endif 2288 2289 // send pending HCI commands 2290 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2291 hci_connection_t * connection = (hci_connection_t *) it; 2292 2293 switch(connection->state){ 2294 case SEND_CREATE_CONNECTION: 2295 switch(connection->address_type){ 2296 case BD_ADDR_TYPE_CLASSIC: 2297 log_info("sending hci_create_connection"); 2298 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2299 break; 2300 default: 2301 #ifdef HAVE_BLE 2302 log_info("sending hci_le_create_connection"); 2303 hci_send_cmd(&hci_le_create_connection, 2304 0x0060, // scan interval: 60 ms 2305 0x0030, // scan interval: 30 ms 2306 0, // don't use whitelist 2307 connection->address_type, // peer address type 2308 connection->address, // peer bd addr 2309 hci_stack->adv_addr_type, // our addr type: 2310 0x0008, // conn interval min 2311 0x0018, // conn interval max 2312 0, // conn latency 2313 0x0048, // supervision timeout 2314 0x0001, // min ce length 2315 0x0001 // max ce length 2316 ); 2317 2318 connection->state = SENT_CREATE_CONNECTION; 2319 #endif 2320 break; 2321 } 2322 return; 2323 2324 case RECEIVED_CONNECTION_REQUEST: 2325 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2326 connection->state = ACCEPTED_CONNECTION_REQUEST; 2327 connection->role = HCI_ROLE_SLAVE; 2328 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2329 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2330 } else { 2331 // remote supported features are not set for this hci_connection_t struct, but there must be an existing ACL connection already 2332 hci_connection_t * base_acl_connection = hci_connection_for_bd_addr_and_type(connection->address, BD_ADDR_TYPE_CLASSIC); 2333 if (!base_acl_connection || !base_acl_connection->remote_supported_feature_eSCO){ 2334 // max latency, retransmission interval: N/A. any packet type 2335 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, 0x000c, hci_stack->sco_voice_setting, 0x02, 0x003f); 2336 } else { 2337 // S4 - max latency == transmission interval = 0x000c == 12 ms, 2338 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, 0x000c, hci_stack->sco_voice_setting, 0x02, 0x388); 2339 } 2340 } 2341 return; 2342 2343 #ifdef HAVE_BLE 2344 case SEND_CANCEL_CONNECTION: 2345 connection->state = SENT_CANCEL_CONNECTION; 2346 hci_send_cmd(&hci_le_create_connection_cancel); 2347 return; 2348 #endif 2349 case SEND_DISCONNECT: 2350 connection->state = SENT_DISCONNECT; 2351 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2352 return; 2353 2354 default: 2355 break; 2356 } 2357 2358 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2359 log_info("responding to link key request"); 2360 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2361 link_key_t link_key; 2362 link_key_type_t link_key_type; 2363 if ( hci_stack->remote_device_db 2364 && hci_stack->remote_device_db->get_link_key(connection->address, link_key, &link_key_type) 2365 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2366 connection->link_key_type = link_key_type; 2367 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2368 } else { 2369 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2370 } 2371 return; 2372 } 2373 2374 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2375 log_info("denying to pin request"); 2376 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2377 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2378 return; 2379 } 2380 2381 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2382 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2383 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2384 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2385 // tweak authentication requirements 2386 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2387 if (connection->bonding_flags & BONDING_DEDICATED){ 2388 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2389 } 2390 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2391 authreq |= 1; 2392 } 2393 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2394 } else { 2395 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2396 } 2397 return; 2398 } 2399 2400 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2401 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2402 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2403 return; 2404 } 2405 2406 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2407 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2408 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2409 return; 2410 } 2411 2412 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2413 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2414 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2415 return; 2416 } 2417 2418 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2419 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2420 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2421 return; 2422 } 2423 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2424 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2425 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2426 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2427 return; 2428 } 2429 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2430 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2431 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2432 return; 2433 } 2434 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2435 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2436 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2437 return; 2438 } 2439 2440 #ifdef HAVE_BLE 2441 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2442 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2443 2444 uint16_t connection_interval_min = connection->le_conn_interval_min; 2445 connection->le_conn_interval_min = 0; 2446 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2447 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2448 0x0000, 0xffff); 2449 } 2450 #endif 2451 } 2452 2453 hci_connection_t * connection; 2454 switch (hci_stack->state){ 2455 case HCI_STATE_INITIALIZING: 2456 hci_initializing_run(); 2457 break; 2458 2459 case HCI_STATE_HALTING: 2460 2461 log_info("HCI_STATE_HALTING"); 2462 2463 // free whitelist entries 2464 #ifdef HAVE_BLE 2465 { 2466 linked_list_iterator_t lit; 2467 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2468 while (linked_list_iterator_has_next(&lit)){ 2469 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2470 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2471 btstack_memory_whitelist_entry_free(entry); 2472 } 2473 } 2474 #endif 2475 // close all open connections 2476 connection = (hci_connection_t *) hci_stack->connections; 2477 if (connection){ 2478 uint16_t con_handle = (uint16_t) connection->con_handle; 2479 if (!hci_can_send_command_packet_now()) return; 2480 2481 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2482 2483 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2484 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2485 2486 // ... which would be ignored anyway as we shutdown (free) the connection now 2487 hci_shutdown_connection(connection); 2488 2489 // finally, send the disconnect command 2490 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2491 return; 2492 } 2493 log_info("HCI_STATE_HALTING, calling off"); 2494 2495 // switch mode 2496 hci_power_control_off(); 2497 2498 log_info("HCI_STATE_HALTING, emitting state"); 2499 hci_emit_state(); 2500 log_info("HCI_STATE_HALTING, done"); 2501 break; 2502 2503 case HCI_STATE_FALLING_ASLEEP: 2504 switch(hci_stack->substate) { 2505 case HCI_FALLING_ASLEEP_DISCONNECT: 2506 log_info("HCI_STATE_FALLING_ASLEEP"); 2507 // close all open connections 2508 connection = (hci_connection_t *) hci_stack->connections; 2509 2510 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2511 // don't close connections, if H4 supports power management 2512 if (bt_control_iphone_power_management_enabled()){ 2513 connection = NULL; 2514 } 2515 #endif 2516 if (connection){ 2517 2518 // send disconnect 2519 if (!hci_can_send_command_packet_now()) return; 2520 2521 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2522 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2523 2524 // send disconnected event right away - causes higher layer connections to get closed, too. 2525 hci_shutdown_connection(connection); 2526 return; 2527 } 2528 2529 if (hci_classic_supported()){ 2530 // disable page and inquiry scan 2531 if (!hci_can_send_command_packet_now()) return; 2532 2533 log_info("HCI_STATE_HALTING, disabling inq scans"); 2534 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2535 2536 // continue in next sub state 2537 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2538 break; 2539 } 2540 // fall through for ble-only chips 2541 2542 case HCI_FALLING_ASLEEP_COMPLETE: 2543 log_info("HCI_STATE_HALTING, calling sleep"); 2544 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2545 // don't actually go to sleep, if H4 supports power management 2546 if (bt_control_iphone_power_management_enabled()){ 2547 // SLEEP MODE reached 2548 hci_stack->state = HCI_STATE_SLEEPING; 2549 hci_emit_state(); 2550 break; 2551 } 2552 #endif 2553 // switch mode 2554 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2555 hci_emit_state(); 2556 break; 2557 2558 default: 2559 break; 2560 } 2561 break; 2562 2563 default: 2564 break; 2565 } 2566 } 2567 2568 int hci_send_cmd_packet(uint8_t *packet, int size){ 2569 bd_addr_t addr; 2570 hci_connection_t * conn; 2571 // house-keeping 2572 2573 // create_connection? 2574 if (IS_COMMAND(packet, hci_create_connection)){ 2575 bt_flip_addr(addr, &packet[3]); 2576 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2577 2578 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2579 if (!conn){ 2580 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2581 if (!conn){ 2582 // notify client that alloc failed 2583 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2584 return 0; // don't sent packet to controller 2585 } 2586 conn->state = SEND_CREATE_CONNECTION; 2587 } 2588 log_info("conn state %u", conn->state); 2589 switch (conn->state){ 2590 // if connection active exists 2591 case OPEN: 2592 // and OPEN, emit connection complete command, don't send to controller 2593 hci_emit_connection_complete(conn, 0); 2594 return 0; 2595 case SEND_CREATE_CONNECTION: 2596 // connection created by hci, e.g. dedicated bonding 2597 break; 2598 default: 2599 // otherwise, just ignore as it is already in the open process 2600 return 0; 2601 } 2602 conn->state = SENT_CREATE_CONNECTION; 2603 } 2604 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2605 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2606 } 2607 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2608 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2609 } 2610 2611 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2612 if (hci_stack->remote_device_db){ 2613 bt_flip_addr(addr, &packet[3]); 2614 hci_stack->remote_device_db->delete_link_key(addr); 2615 } 2616 } 2617 2618 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2619 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2620 bt_flip_addr(addr, &packet[3]); 2621 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2622 if (conn){ 2623 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2624 } 2625 } 2626 2627 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2628 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2629 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2630 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2631 bt_flip_addr(addr, &packet[3]); 2632 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2633 if (conn){ 2634 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2635 } 2636 } 2637 2638 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2639 hci_stack->loopback_mode = packet[3]; 2640 } 2641 2642 #ifdef HAVE_BLE 2643 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2644 hci_stack->adv_addr_type = packet[8]; 2645 } 2646 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2647 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2648 } 2649 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2650 hci_stack->le_advertisements_active = packet[3]; 2651 } 2652 if (IS_COMMAND(packet, hci_le_create_connection)){ 2653 // white list used? 2654 uint8_t initiator_filter_policy = packet[7]; 2655 switch (initiator_filter_policy){ 2656 case 0: 2657 // whitelist not used 2658 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2659 break; 2660 case 1: 2661 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2662 break; 2663 default: 2664 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2665 break; 2666 } 2667 } 2668 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2669 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2670 } 2671 #endif 2672 2673 hci_stack->num_cmd_packets--; 2674 2675 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2676 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2677 2678 // release packet buffer for synchronous transport implementations 2679 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2680 hci_stack->hci_packet_buffer_reserved = 0; 2681 } 2682 2683 return err; 2684 } 2685 2686 // disconnect because of security block 2687 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2688 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2689 if (!connection) return; 2690 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2691 } 2692 2693 2694 // Configure Secure Simple Pairing 2695 2696 // enable will enable SSP during init 2697 void hci_ssp_set_enable(int enable){ 2698 hci_stack->ssp_enable = enable; 2699 } 2700 2701 int hci_local_ssp_activated(void){ 2702 return hci_ssp_supported() && hci_stack->ssp_enable; 2703 } 2704 2705 // if set, BTstack will respond to io capability request using authentication requirement 2706 void hci_ssp_set_io_capability(int io_capability){ 2707 hci_stack->ssp_io_capability = io_capability; 2708 } 2709 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2710 hci_stack->ssp_authentication_requirement = authentication_requirement; 2711 } 2712 2713 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2714 void hci_ssp_set_auto_accept(int auto_accept){ 2715 hci_stack->ssp_auto_accept = auto_accept; 2716 } 2717 2718 /** 2719 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2720 */ 2721 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2722 2723 if (!hci_can_send_command_packet_now()){ 2724 log_error("hci_send_cmd called but cannot send packet now"); 2725 return 0; 2726 } 2727 2728 // for HCI INITIALIZATION 2729 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2730 hci_stack->last_cmd_opcode = cmd->opcode; 2731 2732 hci_reserve_packet_buffer(); 2733 uint8_t * packet = hci_stack->hci_packet_buffer; 2734 2735 va_list argptr; 2736 va_start(argptr, cmd); 2737 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2738 va_end(argptr); 2739 2740 return hci_send_cmd_packet(packet, size); 2741 } 2742 2743 // Create various non-HCI events. 2744 // TODO: generalize, use table similar to hci_create_command 2745 2746 void hci_emit_state(void){ 2747 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2748 uint8_t event[3]; 2749 event[0] = BTSTACK_EVENT_STATE; 2750 event[1] = sizeof(event) - 2; 2751 event[2] = hci_stack->state; 2752 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2753 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2754 } 2755 2756 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2757 uint8_t event[13]; 2758 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2759 event[1] = sizeof(event) - 2; 2760 event[2] = status; 2761 bt_store_16(event, 3, conn->con_handle); 2762 bt_flip_addr(&event[5], conn->address); 2763 event[11] = 1; // ACL connection 2764 event[12] = 0; // encryption disabled 2765 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2766 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2767 } 2768 2769 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2770 uint8_t event[21]; 2771 event[0] = HCI_EVENT_LE_META; 2772 event[1] = sizeof(event) - 2; 2773 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2774 event[3] = status; 2775 bt_store_16(event, 4, conn_handle); 2776 event[6] = 0; // TODO: role 2777 event[7] = address_type; 2778 bt_flip_addr(&event[8], address); 2779 bt_store_16(event, 14, 0); // interval 2780 bt_store_16(event, 16, 0); // latency 2781 bt_store_16(event, 18, 0); // supervision timeout 2782 event[20] = 0; // master clock accuracy 2783 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2784 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2785 } 2786 2787 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2788 uint8_t event[6]; 2789 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2790 event[1] = sizeof(event) - 2; 2791 event[2] = 0; // status = OK 2792 bt_store_16(event, 3, handle); 2793 event[5] = reason; 2794 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2795 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2796 } 2797 2798 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2799 if (disable_l2cap_timeouts) return; 2800 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2801 uint8_t event[4]; 2802 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2803 event[1] = sizeof(event) - 2; 2804 bt_store_16(event, 2, conn->con_handle); 2805 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2806 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2807 } 2808 2809 void hci_emit_nr_connections_changed(void){ 2810 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2811 uint8_t event[3]; 2812 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2813 event[1] = sizeof(event) - 2; 2814 event[2] = nr_hci_connections(); 2815 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2816 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2817 } 2818 2819 void hci_emit_hci_open_failed(void){ 2820 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2821 uint8_t event[2]; 2822 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2823 event[1] = sizeof(event) - 2; 2824 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2825 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2826 } 2827 2828 #ifndef EMBEDDED 2829 void hci_emit_btstack_version(void){ 2830 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2831 uint8_t event[6]; 2832 event[0] = BTSTACK_EVENT_VERSION; 2833 event[1] = sizeof(event) - 2; 2834 event[2] = BTSTACK_MAJOR; 2835 event[3] = BTSTACK_MINOR; 2836 bt_store_16(event, 4, 3257); // last SVN commit on Google Code + 1 2837 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2838 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2839 } 2840 #endif 2841 2842 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2843 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2844 uint8_t event[3]; 2845 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2846 event[1] = sizeof(event) - 2; 2847 event[2] = enabled; 2848 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2849 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2850 } 2851 2852 void hci_emit_remote_name_cached(bd_addr_t addr, device_name_t *name){ 2853 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2854 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2855 event[1] = sizeof(event) - 2 - 1; 2856 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2857 bt_flip_addr(&event[3], addr); 2858 memcpy(&event[9], name, 248); 2859 2860 event[9+248] = 0; // assert \0 for log_info 2861 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(addr), &event[9]); 2862 2863 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2864 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2865 } 2866 2867 void hci_emit_discoverable_enabled(uint8_t enabled){ 2868 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2869 uint8_t event[3]; 2870 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2871 event[1] = sizeof(event) - 2; 2872 event[2] = enabled; 2873 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2874 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2875 } 2876 2877 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2878 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2879 uint8_t event[5]; 2880 int pos = 0; 2881 event[pos++] = GAP_SECURITY_LEVEL; 2882 event[pos++] = sizeof(event) - 2; 2883 bt_store_16(event, 2, con_handle); 2884 pos += 2; 2885 event[pos++] = level; 2886 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2887 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2888 } 2889 2890 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2891 log_info("hci_emit_dedicated_bonding_result %u ", status); 2892 uint8_t event[9]; 2893 int pos = 0; 2894 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2895 event[pos++] = sizeof(event) - 2; 2896 event[pos++] = status; 2897 bt_flip_addr( &event[pos], address); 2898 pos += 6; 2899 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2900 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2901 } 2902 2903 // query if remote side supports eSCO 2904 int hci_remote_eSCO_supported(hci_con_handle_t con_handle){ 2905 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2906 if (!connection) return 0; 2907 return connection->remote_supported_feature_eSCO; 2908 } 2909 2910 // query if remote side supports SSP 2911 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2912 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2913 if (!connection) return 0; 2914 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2915 } 2916 2917 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2918 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2919 } 2920 2921 // GAP API 2922 /** 2923 * @bbrief enable/disable bonding. default is enabled 2924 * @praram enabled 2925 */ 2926 void gap_set_bondable_mode(int enable){ 2927 hci_stack->bondable = enable ? 1 : 0; 2928 } 2929 /** 2930 * @brief Get bondable mode. 2931 * @return 1 if bondable 2932 */ 2933 int gap_get_bondable_mode(void){ 2934 return hci_stack->bondable; 2935 } 2936 2937 /** 2938 * @brief map link keys to security levels 2939 */ 2940 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2941 switch (link_key_type){ 2942 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2943 return LEVEL_4; 2944 case COMBINATION_KEY: 2945 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2946 return LEVEL_3; 2947 default: 2948 return LEVEL_2; 2949 } 2950 } 2951 2952 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2953 if (!connection) return LEVEL_0; 2954 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2955 return gap_security_level_for_link_key_type(connection->link_key_type); 2956 } 2957 2958 2959 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2960 log_info("gap_mitm_protection_required_for_security_level %u", level); 2961 return level > LEVEL_2; 2962 } 2963 2964 /** 2965 * @brief get current security level 2966 */ 2967 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2968 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2969 if (!connection) return LEVEL_0; 2970 return gap_security_level_for_connection(connection); 2971 } 2972 2973 /** 2974 * @brief request connection to device to 2975 * @result GAP_AUTHENTICATION_RESULT 2976 */ 2977 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2978 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2979 if (!connection){ 2980 hci_emit_security_level(con_handle, LEVEL_0); 2981 return; 2982 } 2983 gap_security_level_t current_level = gap_security_level(con_handle); 2984 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2985 if (current_level >= requested_level){ 2986 hci_emit_security_level(con_handle, current_level); 2987 return; 2988 } 2989 2990 connection->requested_security_level = requested_level; 2991 2992 #if 0 2993 // sending encryption request without a link key results in an error. 2994 // TODO: figure out how to use it properly 2995 2996 // would enabling ecnryption suffice (>= LEVEL_2)? 2997 if (hci_stack->remote_device_db){ 2998 link_key_type_t link_key_type; 2999 link_key_t link_key; 3000 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3001 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3002 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3003 return; 3004 } 3005 } 3006 } 3007 #endif 3008 3009 // try to authenticate connection 3010 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3011 hci_run(); 3012 } 3013 3014 /** 3015 * @brief start dedicated bonding with device. disconnect after bonding 3016 * @param device 3017 * @param request MITM protection 3018 * @result GAP_DEDICATED_BONDING_COMPLETE 3019 */ 3020 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3021 3022 // create connection state machine 3023 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3024 3025 if (!connection){ 3026 return BTSTACK_MEMORY_ALLOC_FAILED; 3027 } 3028 3029 // delete linkn key 3030 hci_drop_link_key_for_bd_addr(device); 3031 3032 // configure LEVEL_2/3, dedicated bonding 3033 connection->state = SEND_CREATE_CONNECTION; 3034 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3035 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3036 connection->bonding_flags = BONDING_DEDICATED; 3037 3038 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3039 3040 // handle: connnection failure (connection complete != ok) 3041 // handle: authentication failure 3042 // handle: disconnect on done 3043 3044 hci_run(); 3045 3046 return 0; 3047 } 3048 3049 void gap_set_local_name(const char * local_name){ 3050 hci_stack->local_name = local_name; 3051 } 3052 3053 le_command_status_t le_central_start_scan(void){ 3054 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 3055 hci_stack->le_scanning_state = LE_START_SCAN; 3056 hci_run(); 3057 return BLE_PERIPHERAL_OK; 3058 } 3059 3060 le_command_status_t le_central_stop_scan(void){ 3061 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 3062 hci_stack->le_scanning_state = LE_STOP_SCAN; 3063 hci_run(); 3064 return BLE_PERIPHERAL_OK; 3065 } 3066 3067 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3068 hci_stack->le_scan_type = scan_type; 3069 hci_stack->le_scan_interval = scan_interval; 3070 hci_stack->le_scan_window = scan_window; 3071 hci_run(); 3072 } 3073 3074 le_command_status_t le_central_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3075 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3076 if (!conn){ 3077 log_info("le_central_connect: no connection exists yet, creating context"); 3078 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3079 if (!conn){ 3080 // notify client that alloc failed 3081 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3082 log_info("le_central_connect: failed to alloc hci_connection_t"); 3083 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 3084 } 3085 conn->state = SEND_CREATE_CONNECTION; 3086 log_info("le_central_connect: send create connection next"); 3087 hci_run(); 3088 return BLE_PERIPHERAL_OK; 3089 } 3090 3091 if (!hci_is_le_connection(conn) || 3092 conn->state == SEND_CREATE_CONNECTION || 3093 conn->state == SENT_CREATE_CONNECTION) { 3094 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3095 log_error("le_central_connect: classic connection or connect is already being created"); 3096 return BLE_PERIPHERAL_IN_WRONG_STATE; 3097 } 3098 3099 log_info("le_central_connect: context exists with state %u", conn->state); 3100 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3101 hci_run(); 3102 return BLE_PERIPHERAL_OK; 3103 } 3104 3105 // @assumption: only a single outgoing LE Connection exists 3106 static hci_connection_t * le_central_get_outgoing_connection(void){ 3107 linked_item_t *it; 3108 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 3109 hci_connection_t * conn = (hci_connection_t *) it; 3110 if (!hci_is_le_connection(conn)) continue; 3111 switch (conn->state){ 3112 case SEND_CREATE_CONNECTION: 3113 case SENT_CREATE_CONNECTION: 3114 return conn; 3115 default: 3116 break; 3117 }; 3118 } 3119 return NULL; 3120 } 3121 3122 le_command_status_t le_central_connect_cancel(void){ 3123 hci_connection_t * conn = le_central_get_outgoing_connection(); 3124 if (!conn) return BLE_PERIPHERAL_OK; 3125 switch (conn->state){ 3126 case SEND_CREATE_CONNECTION: 3127 // skip sending create connection and emit event instead 3128 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3129 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 3130 btstack_memory_hci_connection_free( conn ); 3131 break; 3132 case SENT_CREATE_CONNECTION: 3133 // request to send cancel connection 3134 conn->state = SEND_CANCEL_CONNECTION; 3135 hci_run(); 3136 break; 3137 default: 3138 break; 3139 } 3140 return BLE_PERIPHERAL_OK; 3141 } 3142 3143 /** 3144 * @brief Updates the connection parameters for a given LE connection 3145 * @param handle 3146 * @param conn_interval_min (unit: 1.25ms) 3147 * @param conn_interval_max (unit: 1.25ms) 3148 * @param conn_latency 3149 * @param supervision_timeout (unit: 10ms) 3150 * @returns 0 if ok 3151 */ 3152 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3153 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3154 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3155 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3156 connection->le_conn_interval_min = conn_interval_min; 3157 connection->le_conn_interval_max = conn_interval_max; 3158 connection->le_conn_latency = conn_latency; 3159 connection->le_supervision_timeout = supervision_timeout; 3160 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3161 hci_run(); 3162 return 0; 3163 } 3164 3165 /** 3166 * @brief Request an update of the connection parameter for a given LE connection 3167 * @param handle 3168 * @param conn_interval_min (unit: 1.25ms) 3169 * @param conn_interval_max (unit: 1.25ms) 3170 * @param conn_latency 3171 * @param supervision_timeout (unit: 10ms) 3172 * @returns 0 if ok 3173 */ 3174 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3175 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3176 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3177 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3178 connection->le_conn_interval_min = conn_interval_min; 3179 connection->le_conn_interval_max = conn_interval_max; 3180 connection->le_conn_latency = conn_latency; 3181 connection->le_supervision_timeout = supervision_timeout; 3182 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3183 hci_run(); 3184 return 0; 3185 } 3186 3187 /** 3188 * @brief Set Advertisement Data 3189 * @param advertising_data_length 3190 * @param advertising_data (max 31 octets) 3191 * @note data is not copied, pointer has to stay valid 3192 */ 3193 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3194 hci_stack->le_advertisements_data_len = advertising_data_length; 3195 hci_stack->le_advertisements_data = advertising_data; 3196 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_DATA; 3197 // disable advertisements before setting data 3198 if (hci_stack->le_advertisements_active){ 3199 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3200 } 3201 hci_run(); 3202 } 3203 3204 /** 3205 * @brief Set Advertisement Parameters 3206 * @param adv_int_min 3207 * @param adv_int_max 3208 * @param adv_type 3209 * @param own_address_type 3210 * @param direct_address_type 3211 * @param direct_address 3212 * @param channel_map 3213 * @param filter_policy 3214 * 3215 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3216 */ 3217 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3218 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3219 uint8_t channel_map, uint8_t filter_policy) { 3220 3221 hci_stack->le_advertisements_interval_min = adv_int_min; 3222 hci_stack->le_advertisements_interval_max = adv_int_max; 3223 hci_stack->le_advertisements_type = adv_type; 3224 hci_stack->le_advertisements_own_address_type = own_address_type; 3225 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3226 hci_stack->le_advertisements_channel_map = channel_map; 3227 hci_stack->le_advertisements_filter_policy = filter_policy; 3228 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3229 3230 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3231 // disable advertisements before changing params 3232 if (hci_stack->le_advertisements_active){ 3233 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3234 } 3235 hci_run(); 3236 } 3237 3238 /** 3239 * @brief Enable/Disable Advertisements 3240 * @param enabled 3241 */ 3242 void gap_advertisements_enable(int enabled){ 3243 hci_stack->le_advertisements_enabled = enabled; 3244 if (enabled && !hci_stack->le_advertisements_active){ 3245 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3246 } 3247 if (!enabled && hci_stack->le_advertisements_active){ 3248 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3249 } 3250 hci_run(); 3251 } 3252 3253 3254 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 3255 hci_connection_t * conn = hci_connection_for_handle(handle); 3256 if (!conn){ 3257 hci_emit_disconnection_complete(handle, 0); 3258 return BLE_PERIPHERAL_OK; 3259 } 3260 conn->state = SEND_DISCONNECT; 3261 hci_run(); 3262 return BLE_PERIPHERAL_OK; 3263 } 3264 3265 /** 3266 * @brief Get connection type 3267 * @param con_handle 3268 * @result connection_type 3269 */ 3270 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3271 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3272 if (!conn) return GAP_CONNECTION_INVALID; 3273 switch (conn->address_type){ 3274 case BD_ADDR_TYPE_LE_PUBLIC: 3275 case BD_ADDR_TYPE_LE_RANDOM: 3276 return GAP_CONNECTION_LE; 3277 case BD_ADDR_TYPE_SCO: 3278 return GAP_CONNECTION_SCO; 3279 case BD_ADDR_TYPE_CLASSIC: 3280 return GAP_CONNECTION_ACL; 3281 default: 3282 return GAP_CONNECTION_INVALID; 3283 } 3284 } 3285 3286 #ifdef HAVE_BLE 3287 3288 /** 3289 * @brief Auto Connection Establishment - Start Connecting to device 3290 * @param address_typ 3291 * @param address 3292 * @returns 0 if ok 3293 */ 3294 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3295 // check capacity 3296 int num_entries = linked_list_count(&hci_stack->le_whitelist); 3297 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3298 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3299 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3300 entry->address_type = address_type; 3301 memcpy(entry->address, address, 6); 3302 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3303 linked_list_add(&hci_stack->le_whitelist, (linked_item_t*) entry); 3304 hci_run(); 3305 return 0; 3306 } 3307 3308 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3309 linked_list_iterator_t it; 3310 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3311 while (linked_list_iterator_has_next(&it)){ 3312 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3313 if (entry->address_type != address_type) continue; 3314 if (memcmp(entry->address, address, 6) != 0) continue; 3315 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3316 // remove from controller if already present 3317 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3318 continue; 3319 } 3320 // direclty remove entry from whitelist 3321 linked_list_iterator_remove(&it); 3322 btstack_memory_whitelist_entry_free(entry); 3323 } 3324 } 3325 3326 /** 3327 * @brief Auto Connection Establishment - Stop Connecting to device 3328 * @param address_typ 3329 * @param address 3330 * @returns 0 if ok 3331 */ 3332 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3333 hci_remove_from_whitelist(address_type, address); 3334 hci_run(); 3335 return 0; 3336 } 3337 3338 /** 3339 * @brief Auto Connection Establishment - Stop everything 3340 * @note Convenience function to stop all active auto connection attempts 3341 */ 3342 void gap_auto_connection_stop_all(void){ 3343 linked_list_iterator_t it; 3344 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3345 while (linked_list_iterator_has_next(&it)){ 3346 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3347 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3348 // remove from controller if already present 3349 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3350 continue; 3351 } 3352 // directly remove entry from whitelist 3353 linked_list_iterator_remove(&it); 3354 btstack_memory_whitelist_entry_free(entry); 3355 } 3356 hci_run(); 3357 } 3358 3359 #endif 3360 3361 /** 3362 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3363 */ 3364 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3365 hci_stack->sco_voice_setting = voice_setting; 3366 } 3367 3368 /** 3369 * @brief Get SCO Voice Setting 3370 * @return current voice setting 3371 */ 3372 uint16_t hci_get_sco_voice_setting(){ 3373 return hci_stack->sco_voice_setting; 3374 } 3375 3376 /** 3377 * @brief Set callback for Bluetooth Hardware Error 3378 */ 3379 void hci_set_hardware_error_callback(void (*fn)(void)){ 3380 hci_stack->hardware_error_callback = fn; 3381 } 3382 3383 3384 void hci_disconnect_all(void){ 3385 linked_list_iterator_t it; 3386 linked_list_iterator_init(&it, &hci_stack->connections); 3387 while (linked_list_iterator_has_next(&it)){ 3388 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 3389 if (con->state == SENT_DISCONNECT) continue; 3390 con->state = SEND_DISCONNECT; 3391 } 3392 hci_run(); 3393 } 3394