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 "version.h" 66 #endif 67 68 #include "btstack_memory.h" 69 #include "debug.h" 70 #include "hci_dump.h" 71 72 #include "linked_list.h" 73 #include "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 } 1407 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1408 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 1409 if (conn->bonding_flags & BONDING_DEDICATED){ 1410 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1411 } 1412 break; 1413 1414 case HCI_EVENT_LINK_KEY_REQUEST: 1415 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1416 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1417 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1418 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1419 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1420 hci_run(); 1421 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1422 return; 1423 1424 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1425 bt_flip_addr(addr, &packet[2]); 1426 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1427 if (!conn) break; 1428 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1429 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1430 // Change Connection Encryption keeps link key type 1431 if (link_key_type != CHANGED_COMBINATION_KEY){ 1432 conn->link_key_type = link_key_type; 1433 } 1434 if (!hci_stack->remote_device_db) break; 1435 hci_stack->remote_device_db->put_link_key(addr, &packet[8], conn->link_key_type); 1436 // still forward event to allow dismiss of pairing dialog 1437 break; 1438 } 1439 1440 case HCI_EVENT_PIN_CODE_REQUEST: 1441 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1442 // non-bondable mode: pin code negative reply will be sent 1443 if (!hci_stack->bondable){ 1444 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1445 hci_run(); 1446 return; 1447 } 1448 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1449 if (!hci_stack->remote_device_db) break; 1450 bt_flip_addr(addr, &packet[2]); 1451 hci_stack->remote_device_db->delete_link_key(addr); 1452 break; 1453 1454 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1455 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1456 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1457 break; 1458 1459 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1460 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1461 if (!hci_stack->ssp_auto_accept) break; 1462 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1463 break; 1464 1465 case HCI_EVENT_USER_PASSKEY_REQUEST: 1466 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1467 if (!hci_stack->ssp_auto_accept) break; 1468 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1469 break; 1470 1471 case HCI_EVENT_ENCRYPTION_CHANGE: 1472 handle = READ_BT_16(packet, 3); 1473 conn = hci_connection_for_handle(handle); 1474 if (!conn) break; 1475 if (packet[2] == 0) { 1476 if (packet[5]){ 1477 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1478 } else { 1479 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1480 } 1481 } 1482 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1483 break; 1484 1485 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1486 handle = READ_BT_16(packet, 3); 1487 conn = hci_connection_for_handle(handle); 1488 if (!conn) break; 1489 1490 // dedicated bonding: send result and disconnect 1491 if (conn->bonding_flags & BONDING_DEDICATED){ 1492 conn->bonding_flags &= ~BONDING_DEDICATED; 1493 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1494 conn->bonding_status = packet[2]; 1495 break; 1496 } 1497 1498 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1499 // link key sufficient for requested security 1500 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1501 break; 1502 } 1503 // not enough 1504 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1505 break; 1506 1507 #ifndef EMBEDDED 1508 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1509 if (!hci_stack->remote_device_db) break; 1510 if (packet[2]) break; // status not ok 1511 bt_flip_addr(addr, &packet[3]); 1512 // fix for invalid remote names - terminate on 0xff 1513 for (i=0; i<248;i++){ 1514 if (packet[9+i] == 0xff){ 1515 packet[9+i] = 0; 1516 break; 1517 } 1518 } 1519 memset(&device_name, 0, sizeof(device_name_t)); 1520 strncpy((char*) device_name, (char*) &packet[9], 248); 1521 hci_stack->remote_device_db->put_name(addr, &device_name); 1522 break; 1523 1524 case HCI_EVENT_INQUIRY_RESULT: 1525 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1526 if (!hci_stack->remote_device_db) break; 1527 // first send inq result packet 1528 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1529 // then send cached remote names 1530 int offset = 3; 1531 for (i=0; i<packet[2];i++){ 1532 bt_flip_addr(addr, &packet[offset]); 1533 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1534 if (hci_stack->remote_device_db->get_name(addr, &device_name)){ 1535 hci_emit_remote_name_cached(addr, &device_name); 1536 } 1537 } 1538 return; 1539 } 1540 #endif 1541 1542 // HCI_EVENT_DISCONNECTION_COMPLETE 1543 // has been split, to first notify stack before shutting connection down 1544 // see end of function, too. 1545 case HCI_EVENT_DISCONNECTION_COMPLETE: 1546 if (packet[2]) break; // status != 0 1547 handle = READ_BT_16(packet, 3); 1548 conn = hci_connection_for_handle(handle); 1549 if (!conn) break; // no conn struct anymore 1550 // re-enable advertisements for le connections if active 1551 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1552 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1553 } 1554 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1555 break; 1556 1557 case HCI_EVENT_HARDWARE_ERROR: 1558 if (hci_stack->hardware_error_callback){ 1559 (*hci_stack->hardware_error_callback)(); 1560 } else if(hci_stack->control && hci_stack->control->hw_error){ 1561 (*hci_stack->control->hw_error)(); 1562 } else { 1563 // if no special requests, just reboot stack 1564 hci_power_control_off(); 1565 hci_power_control_on(); 1566 } 1567 break; 1568 1569 case HCI_EVENT_ROLE_CHANGE: 1570 if (packet[2]) break; // status != 0 1571 handle = READ_BT_16(packet, 3); 1572 conn = hci_connection_for_handle(handle); 1573 if (!conn) break; // no conn 1574 conn->role = packet[9]; 1575 break; 1576 1577 case DAEMON_EVENT_HCI_PACKET_SENT: 1578 // release packet buffer only for asynchronous transport and if there are not further fragements 1579 if (hci_transport_synchronous()) { 1580 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1581 return; // instead of break: to avoid re-entering hci_run() 1582 } 1583 if (hci_stack->acl_fragmentation_total_size) break; 1584 hci_release_packet_buffer(); 1585 break; 1586 1587 #ifdef HAVE_BLE 1588 case HCI_EVENT_LE_META: 1589 switch (packet[2]){ 1590 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1591 log_info("advertising report received"); 1592 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1593 le_handle_advertisement_report(packet, size); 1594 break; 1595 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1596 // Connection management 1597 bt_flip_addr(addr, &packet[8]); 1598 addr_type = (bd_addr_type_t)packet[7]; 1599 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1600 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1601 // if auto-connect, remove from whitelist in both roles 1602 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1603 hci_remove_from_whitelist(addr_type, addr); 1604 } 1605 // handle error: error is reported only to the initiator -> outgoing connection 1606 if (packet[3]){ 1607 // outgoing connection establishment is done 1608 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1609 // remove entry 1610 if (conn){ 1611 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1612 btstack_memory_hci_connection_free( conn ); 1613 } 1614 break; 1615 } 1616 // on success, both hosts receive connection complete event 1617 if (packet[6] == HCI_ROLE_MASTER){ 1618 // if we're master, it was an outgoing connection and we're done with it 1619 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1620 } else { 1621 // if we're slave, it was an incoming connection, advertisements have stopped 1622 hci_stack->le_advertisements_active = 0; 1623 } 1624 // LE connections are auto-accepted, so just create a connection if there isn't one already 1625 if (!conn){ 1626 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1627 } 1628 // no memory, sorry. 1629 if (!conn){ 1630 break; 1631 } 1632 1633 conn->state = OPEN; 1634 conn->role = packet[6]; 1635 conn->con_handle = READ_BT_16(packet, 4); 1636 1637 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1638 1639 // restart timer 1640 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1641 // run_loop_add_timer(&conn->timeout); 1642 1643 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1644 1645 hci_emit_nr_connections_changed(); 1646 break; 1647 1648 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1649 1650 default: 1651 break; 1652 } 1653 break; 1654 #endif 1655 default: 1656 break; 1657 } 1658 1659 // handle BT initialization 1660 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1661 hci_initializing_event_handler(packet, size); 1662 } 1663 1664 // help with BT sleep 1665 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1666 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1667 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1668 hci_initializing_next_state(); 1669 } 1670 1671 // notify upper stack 1672 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1673 1674 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1675 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1676 if (!packet[2]){ 1677 handle = READ_BT_16(packet, 3); 1678 hci_connection_t * aConn = hci_connection_for_handle(handle); 1679 if (aConn) { 1680 uint8_t status = aConn->bonding_status; 1681 uint16_t flags = aConn->bonding_flags; 1682 bd_addr_t bd_address; 1683 memcpy(&bd_address, aConn->address, 6); 1684 hci_shutdown_connection(aConn); 1685 // connection struct is gone, don't access anymore 1686 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1687 hci_emit_dedicated_bonding_result(bd_address, status); 1688 } 1689 } 1690 } 1691 } 1692 1693 // execute main loop 1694 hci_run(); 1695 } 1696 1697 static void sco_handler(uint8_t * packet, uint16_t size){ 1698 if (!hci_stack->sco_packet_handler) return; 1699 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, packet, size); 1700 } 1701 1702 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1703 hci_dump_packet(packet_type, 1, packet, size); 1704 switch (packet_type) { 1705 case HCI_EVENT_PACKET: 1706 event_handler(packet, size); 1707 break; 1708 case HCI_ACL_DATA_PACKET: 1709 acl_handler(packet, size); 1710 break; 1711 case HCI_SCO_DATA_PACKET: 1712 sco_handler(packet, size); 1713 default: 1714 break; 1715 } 1716 } 1717 1718 /** Register HCI packet handlers */ 1719 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1720 hci_stack->packet_handler = handler; 1721 } 1722 1723 /** 1724 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 1725 */ 1726 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1727 hci_stack->sco_packet_handler = handler; 1728 } 1729 1730 static void hci_state_reset(void){ 1731 // no connections yet 1732 hci_stack->connections = NULL; 1733 1734 // keep discoverable/connectable as this has been requested by the client(s) 1735 // hci_stack->discoverable = 0; 1736 // hci_stack->connectable = 0; 1737 // hci_stack->bondable = 1; 1738 1739 // buffer is free 1740 hci_stack->hci_packet_buffer_reserved = 0; 1741 1742 // no pending cmds 1743 hci_stack->decline_reason = 0; 1744 hci_stack->new_scan_enable_value = 0xff; 1745 1746 // LE 1747 hci_stack->adv_addr_type = 0; 1748 memset(hci_stack->adv_address, 0, 6); 1749 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1750 hci_stack->le_scan_type = 0xff; 1751 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1752 hci_stack->le_whitelist = 0; 1753 hci_stack->le_whitelist_capacity = 0; 1754 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 1755 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 1756 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 1757 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 1758 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 1759 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 1760 } 1761 1762 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1763 1764 #ifdef HAVE_MALLOC 1765 if (!hci_stack) { 1766 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1767 } 1768 #else 1769 hci_stack = &hci_stack_static; 1770 #endif 1771 memset(hci_stack, 0, sizeof(hci_stack_t)); 1772 1773 // reference to use transport layer implementation 1774 hci_stack->hci_transport = transport; 1775 1776 // references to used control implementation 1777 hci_stack->control = control; 1778 1779 // reference to used config 1780 hci_stack->config = config; 1781 1782 // higher level handler 1783 hci_stack->packet_handler = dummy_handler; 1784 1785 // store and open remote device db 1786 hci_stack->remote_device_db = remote_device_db; 1787 if (hci_stack->remote_device_db) { 1788 hci_stack->remote_device_db->open(); 1789 } 1790 1791 // max acl payload size defined in config.h 1792 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1793 1794 // register packet handlers with transport 1795 transport->register_packet_handler(&packet_handler); 1796 1797 hci_stack->state = HCI_STATE_OFF; 1798 1799 // class of device 1800 hci_stack->class_of_device = 0x007a020c; // Smartphone 1801 1802 // bondable by default 1803 hci_stack->bondable = 1; 1804 1805 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1806 hci_stack->ssp_enable = 1; 1807 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1808 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1809 hci_stack->ssp_auto_accept = 1; 1810 1811 // voice setting - signed 8 bit pcm data with CVSD over the air 1812 hci_stack->sco_voice_setting = 0x40; 1813 1814 hci_state_reset(); 1815 } 1816 1817 void hci_close(void){ 1818 // close remote device db 1819 if (hci_stack->remote_device_db) { 1820 hci_stack->remote_device_db->close(); 1821 } 1822 while (hci_stack->connections) { 1823 // cancel all l2cap connections 1824 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1825 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1826 } 1827 hci_power_control(HCI_POWER_OFF); 1828 1829 #ifdef HAVE_MALLOC 1830 free(hci_stack); 1831 #endif 1832 hci_stack = NULL; 1833 } 1834 1835 void hci_set_class_of_device(uint32_t class_of_device){ 1836 hci_stack->class_of_device = class_of_device; 1837 } 1838 1839 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1840 void hci_set_bd_addr(bd_addr_t addr){ 1841 memcpy(hci_stack->custom_bd_addr, addr, 6); 1842 hci_stack->custom_bd_addr_set = 1; 1843 } 1844 1845 void hci_disable_l2cap_timeout_check(void){ 1846 disable_l2cap_timeouts = 1; 1847 } 1848 // State-Module-Driver overview 1849 // state module low-level 1850 // HCI_STATE_OFF off close 1851 // HCI_STATE_INITIALIZING, on open 1852 // HCI_STATE_WORKING, on open 1853 // HCI_STATE_HALTING, on open 1854 // HCI_STATE_SLEEPING, off/sleep close 1855 // HCI_STATE_FALLING_ASLEEP on open 1856 1857 static int hci_power_control_on(void){ 1858 1859 // power on 1860 int err = 0; 1861 if (hci_stack->control && hci_stack->control->on){ 1862 err = (*hci_stack->control->on)(hci_stack->config); 1863 } 1864 if (err){ 1865 log_error( "POWER_ON failed"); 1866 hci_emit_hci_open_failed(); 1867 return err; 1868 } 1869 1870 // open low-level device 1871 err = hci_stack->hci_transport->open(hci_stack->config); 1872 if (err){ 1873 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1874 if (hci_stack->control && hci_stack->control->off){ 1875 (*hci_stack->control->off)(hci_stack->config); 1876 } 1877 hci_emit_hci_open_failed(); 1878 return err; 1879 } 1880 return 0; 1881 } 1882 1883 static void hci_power_control_off(void){ 1884 1885 log_info("hci_power_control_off"); 1886 1887 // close low-level device 1888 hci_stack->hci_transport->close(hci_stack->config); 1889 1890 log_info("hci_power_control_off - hci_transport closed"); 1891 1892 // power off 1893 if (hci_stack->control && hci_stack->control->off){ 1894 (*hci_stack->control->off)(hci_stack->config); 1895 } 1896 1897 log_info("hci_power_control_off - control closed"); 1898 1899 hci_stack->state = HCI_STATE_OFF; 1900 } 1901 1902 static void hci_power_control_sleep(void){ 1903 1904 log_info("hci_power_control_sleep"); 1905 1906 #if 0 1907 // don't close serial port during sleep 1908 1909 // close low-level device 1910 hci_stack->hci_transport->close(hci_stack->config); 1911 #endif 1912 1913 // sleep mode 1914 if (hci_stack->control && hci_stack->control->sleep){ 1915 (*hci_stack->control->sleep)(hci_stack->config); 1916 } 1917 1918 hci_stack->state = HCI_STATE_SLEEPING; 1919 } 1920 1921 static int hci_power_control_wake(void){ 1922 1923 log_info("hci_power_control_wake"); 1924 1925 // wake on 1926 if (hci_stack->control && hci_stack->control->wake){ 1927 (*hci_stack->control->wake)(hci_stack->config); 1928 } 1929 1930 #if 0 1931 // open low-level device 1932 int err = hci_stack->hci_transport->open(hci_stack->config); 1933 if (err){ 1934 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1935 if (hci_stack->control && hci_stack->control->off){ 1936 (*hci_stack->control->off)(hci_stack->config); 1937 } 1938 hci_emit_hci_open_failed(); 1939 return err; 1940 } 1941 #endif 1942 1943 return 0; 1944 } 1945 1946 static void hci_power_transition_to_initializing(void){ 1947 // set up state machine 1948 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1949 hci_stack->hci_packet_buffer_reserved = 0; 1950 hci_stack->state = HCI_STATE_INITIALIZING; 1951 hci_stack->substate = HCI_INIT_SEND_RESET; 1952 } 1953 1954 int hci_power_control(HCI_POWER_MODE power_mode){ 1955 1956 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 1957 1958 int err = 0; 1959 switch (hci_stack->state){ 1960 1961 case HCI_STATE_OFF: 1962 switch (power_mode){ 1963 case HCI_POWER_ON: 1964 err = hci_power_control_on(); 1965 if (err) { 1966 log_error("hci_power_control_on() error %u", err); 1967 return err; 1968 } 1969 hci_power_transition_to_initializing(); 1970 break; 1971 case HCI_POWER_OFF: 1972 // do nothing 1973 break; 1974 case HCI_POWER_SLEEP: 1975 // do nothing (with SLEEP == OFF) 1976 break; 1977 } 1978 break; 1979 1980 case HCI_STATE_INITIALIZING: 1981 switch (power_mode){ 1982 case HCI_POWER_ON: 1983 // do nothing 1984 break; 1985 case HCI_POWER_OFF: 1986 // no connections yet, just turn it off 1987 hci_power_control_off(); 1988 break; 1989 case HCI_POWER_SLEEP: 1990 // no connections yet, just turn it off 1991 hci_power_control_sleep(); 1992 break; 1993 } 1994 break; 1995 1996 case HCI_STATE_WORKING: 1997 switch (power_mode){ 1998 case HCI_POWER_ON: 1999 // do nothing 2000 break; 2001 case HCI_POWER_OFF: 2002 // see hci_run 2003 hci_stack->state = HCI_STATE_HALTING; 2004 break; 2005 case HCI_POWER_SLEEP: 2006 // see hci_run 2007 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2008 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2009 break; 2010 } 2011 break; 2012 2013 case HCI_STATE_HALTING: 2014 switch (power_mode){ 2015 case HCI_POWER_ON: 2016 hci_power_transition_to_initializing(); 2017 break; 2018 case HCI_POWER_OFF: 2019 // do nothing 2020 break; 2021 case HCI_POWER_SLEEP: 2022 // see hci_run 2023 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2024 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2025 break; 2026 } 2027 break; 2028 2029 case HCI_STATE_FALLING_ASLEEP: 2030 switch (power_mode){ 2031 case HCI_POWER_ON: 2032 2033 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2034 // nothing to do, if H4 supports power management 2035 if (bt_control_iphone_power_management_enabled()){ 2036 hci_stack->state = HCI_STATE_INITIALIZING; 2037 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2038 break; 2039 } 2040 #endif 2041 hci_power_transition_to_initializing(); 2042 break; 2043 case HCI_POWER_OFF: 2044 // see hci_run 2045 hci_stack->state = HCI_STATE_HALTING; 2046 break; 2047 case HCI_POWER_SLEEP: 2048 // do nothing 2049 break; 2050 } 2051 break; 2052 2053 case HCI_STATE_SLEEPING: 2054 switch (power_mode){ 2055 case HCI_POWER_ON: 2056 2057 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2058 // nothing to do, if H4 supports power management 2059 if (bt_control_iphone_power_management_enabled()){ 2060 hci_stack->state = HCI_STATE_INITIALIZING; 2061 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2062 hci_update_scan_enable(); 2063 break; 2064 } 2065 #endif 2066 err = hci_power_control_wake(); 2067 if (err) return err; 2068 hci_power_transition_to_initializing(); 2069 break; 2070 case HCI_POWER_OFF: 2071 hci_stack->state = HCI_STATE_HALTING; 2072 break; 2073 case HCI_POWER_SLEEP: 2074 // do nothing 2075 break; 2076 } 2077 break; 2078 } 2079 2080 // create internal event 2081 hci_emit_state(); 2082 2083 // trigger next/first action 2084 hci_run(); 2085 2086 return 0; 2087 } 2088 2089 static void hci_update_scan_enable(void){ 2090 // 2 = page scan, 1 = inq scan 2091 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2092 hci_run(); 2093 } 2094 2095 void hci_discoverable_control(uint8_t enable){ 2096 if (enable) enable = 1; // normalize argument 2097 2098 if (hci_stack->discoverable == enable){ 2099 hci_emit_discoverable_enabled(hci_stack->discoverable); 2100 return; 2101 } 2102 2103 hci_stack->discoverable = enable; 2104 hci_update_scan_enable(); 2105 } 2106 2107 void hci_connectable_control(uint8_t enable){ 2108 if (enable) enable = 1; // normalize argument 2109 2110 // don't emit event 2111 if (hci_stack->connectable == enable) return; 2112 2113 hci_stack->connectable = enable; 2114 hci_update_scan_enable(); 2115 } 2116 2117 void hci_local_bd_addr(bd_addr_t address_buffer){ 2118 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2119 } 2120 2121 void hci_run(void){ 2122 2123 // log_info("hci_run: entered"); 2124 linked_item_t * it; 2125 2126 // send continuation fragments first, as they block the prepared packet buffer 2127 if (hci_stack->acl_fragmentation_total_size > 0) { 2128 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2129 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2130 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2131 if (connection) { 2132 hci_send_acl_packet_fragments(connection); 2133 return; 2134 } 2135 // connection gone -> discard further fragments 2136 hci_stack->acl_fragmentation_total_size = 0; 2137 hci_stack->acl_fragmentation_pos = 0; 2138 } 2139 } 2140 2141 if (!hci_can_send_command_packet_now()) return; 2142 2143 // global/non-connection oriented commands 2144 2145 // decline incoming connections 2146 if (hci_stack->decline_reason){ 2147 uint8_t reason = hci_stack->decline_reason; 2148 hci_stack->decline_reason = 0; 2149 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2150 return; 2151 } 2152 2153 // send scan enable 2154 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2155 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2156 hci_stack->new_scan_enable_value = 0xff; 2157 return; 2158 } 2159 2160 #ifdef HAVE_BLE 2161 if (hci_stack->state == HCI_STATE_WORKING){ 2162 // handle le scan 2163 switch(hci_stack->le_scanning_state){ 2164 case LE_START_SCAN: 2165 hci_stack->le_scanning_state = LE_SCANNING; 2166 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2167 return; 2168 2169 case LE_STOP_SCAN: 2170 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2171 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2172 return; 2173 default: 2174 break; 2175 } 2176 if (hci_stack->le_scan_type != 0xff){ 2177 // defaults: active scanning, accept all advertisement packets 2178 int scan_type = hci_stack->le_scan_type; 2179 hci_stack->le_scan_type = 0xff; 2180 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); 2181 return; 2182 } 2183 // le advertisement control 2184 if (hci_stack->le_advertisements_todo){ 2185 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2186 } 2187 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2188 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2189 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2190 return; 2191 } 2192 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2193 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2194 hci_send_cmd(&hci_le_set_advertising_parameters, 2195 hci_stack->le_advertisements_interval_min, 2196 hci_stack->le_advertisements_interval_max, 2197 hci_stack->le_advertisements_type, 2198 hci_stack->le_advertisements_own_address_type, 2199 hci_stack->le_advertisements_direct_address_type, 2200 hci_stack->le_advertisements_direct_address, 2201 hci_stack->le_advertisements_channel_map, 2202 hci_stack->le_advertisements_filter_policy); 2203 return; 2204 } 2205 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_DATA){ 2206 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_DATA; 2207 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2208 hci_stack->le_advertisements_data); 2209 return; 2210 } 2211 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2212 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2213 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2214 return; 2215 } 2216 2217 // 2218 // LE Whitelist Management 2219 // 2220 2221 // check if whitelist needs modification 2222 linked_list_iterator_t lit; 2223 int modification_pending = 0; 2224 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2225 while (linked_list_iterator_has_next(&lit)){ 2226 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2227 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2228 modification_pending = 1; 2229 break; 2230 } 2231 } 2232 2233 if (modification_pending){ 2234 // stop connnecting if modification pending 2235 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2236 hci_send_cmd(&hci_le_create_connection_cancel); 2237 return; 2238 } 2239 2240 // add/remove entries 2241 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2242 while (linked_list_iterator_has_next(&lit)){ 2243 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2244 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2245 entry->state = LE_WHITELIST_ON_CONTROLLER; 2246 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2247 return; 2248 2249 } 2250 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2251 bd_addr_t address; 2252 bd_addr_type_t address_type = entry->address_type; 2253 memcpy(address, entry->address, 6); 2254 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2255 btstack_memory_whitelist_entry_free(entry); 2256 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2257 return; 2258 } 2259 } 2260 } 2261 2262 // start connecting 2263 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2264 !linked_list_empty(&hci_stack->le_whitelist)){ 2265 bd_addr_t null_addr; 2266 memset(null_addr, 0, 6); 2267 hci_send_cmd(&hci_le_create_connection, 2268 0x0060, // scan interval: 60 ms 2269 0x0030, // scan interval: 30 ms 2270 1, // use whitelist 2271 0, // peer address type 2272 null_addr, // peer bd addr 2273 hci_stack->adv_addr_type, // our addr type: 2274 0x0008, // conn interval min 2275 0x0018, // conn interval max 2276 0, // conn latency 2277 0x0048, // supervision timeout 2278 0x0001, // min ce length 2279 0x0001 // max ce length 2280 ); 2281 return; 2282 } 2283 } 2284 #endif 2285 2286 // send pending HCI commands 2287 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2288 hci_connection_t * connection = (hci_connection_t *) it; 2289 2290 switch(connection->state){ 2291 case SEND_CREATE_CONNECTION: 2292 switch(connection->address_type){ 2293 case BD_ADDR_TYPE_CLASSIC: 2294 log_info("sending hci_create_connection"); 2295 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2296 break; 2297 default: 2298 #ifdef HAVE_BLE 2299 log_info("sending hci_le_create_connection"); 2300 hci_send_cmd(&hci_le_create_connection, 2301 0x0060, // scan interval: 60 ms 2302 0x0030, // scan interval: 30 ms 2303 0, // don't use whitelist 2304 connection->address_type, // peer address type 2305 connection->address, // peer bd addr 2306 hci_stack->adv_addr_type, // our addr type: 2307 0x0008, // conn interval min 2308 0x0018, // conn interval max 2309 0, // conn latency 2310 0x0048, // supervision timeout 2311 0x0001, // min ce length 2312 0x0001 // max ce length 2313 ); 2314 2315 connection->state = SENT_CREATE_CONNECTION; 2316 #endif 2317 break; 2318 } 2319 return; 2320 2321 case RECEIVED_CONNECTION_REQUEST: 2322 log_info("sending hci_accept_connection_request"); 2323 connection->state = ACCEPTED_CONNECTION_REQUEST; 2324 connection->role = HCI_ROLE_SLAVE; 2325 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2326 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2327 } else { 2328 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, 0xFFFF, hci_stack->sco_voice_setting, 0xFF, 0x003F); 2329 } 2330 return; 2331 2332 #ifdef HAVE_BLE 2333 case SEND_CANCEL_CONNECTION: 2334 connection->state = SENT_CANCEL_CONNECTION; 2335 hci_send_cmd(&hci_le_create_connection_cancel); 2336 return; 2337 #endif 2338 case SEND_DISCONNECT: 2339 connection->state = SENT_DISCONNECT; 2340 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2341 return; 2342 2343 default: 2344 break; 2345 } 2346 2347 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2348 log_info("responding to link key request"); 2349 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2350 link_key_t link_key; 2351 link_key_type_t link_key_type; 2352 if ( hci_stack->remote_device_db 2353 && hci_stack->remote_device_db->get_link_key(connection->address, link_key, &link_key_type) 2354 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2355 connection->link_key_type = link_key_type; 2356 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2357 } else { 2358 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2359 } 2360 return; 2361 } 2362 2363 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2364 log_info("denying to pin request"); 2365 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2366 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2367 return; 2368 } 2369 2370 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2371 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2372 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2373 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2374 // tweak authentication requirements 2375 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2376 if (connection->bonding_flags & BONDING_DEDICATED){ 2377 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2378 } 2379 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2380 authreq |= 1; 2381 } 2382 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2383 } else { 2384 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2385 } 2386 return; 2387 } 2388 2389 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2390 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2391 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2392 return; 2393 } 2394 2395 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2396 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2397 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2398 return; 2399 } 2400 2401 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2402 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2403 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2404 return; 2405 } 2406 2407 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2408 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2409 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2410 return; 2411 } 2412 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2413 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2414 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2415 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2416 return; 2417 } 2418 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2419 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2420 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2421 return; 2422 } 2423 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2424 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2425 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2426 return; 2427 } 2428 2429 #ifdef HAVE_BLE 2430 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2431 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2432 2433 uint16_t connection_interval_min = connection->le_conn_interval_min; 2434 connection->le_conn_interval_min = 0; 2435 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2436 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2437 0x0000, 0xffff); 2438 } 2439 #endif 2440 } 2441 2442 hci_connection_t * connection; 2443 switch (hci_stack->state){ 2444 case HCI_STATE_INITIALIZING: 2445 hci_initializing_run(); 2446 break; 2447 2448 case HCI_STATE_HALTING: 2449 2450 log_info("HCI_STATE_HALTING"); 2451 2452 // free whitelist entries 2453 #ifdef HAVE_BLE 2454 { 2455 linked_list_iterator_t lit; 2456 linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2457 while (linked_list_iterator_has_next(&lit)){ 2458 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&lit); 2459 linked_list_remove(&hci_stack->le_whitelist, (linked_item_t *) entry); 2460 btstack_memory_whitelist_entry_free(entry); 2461 } 2462 } 2463 #endif 2464 // close all open connections 2465 connection = (hci_connection_t *) hci_stack->connections; 2466 if (connection){ 2467 uint16_t con_handle = (uint16_t) connection->con_handle; 2468 if (!hci_can_send_command_packet_now()) return; 2469 2470 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2471 2472 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2473 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2474 2475 // ... which would be ignored anyway as we shutdown (free) the connection now 2476 hci_shutdown_connection(connection); 2477 2478 // finally, send the disconnect command 2479 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2480 return; 2481 } 2482 log_info("HCI_STATE_HALTING, calling off"); 2483 2484 // switch mode 2485 hci_power_control_off(); 2486 2487 log_info("HCI_STATE_HALTING, emitting state"); 2488 hci_emit_state(); 2489 log_info("HCI_STATE_HALTING, done"); 2490 break; 2491 2492 case HCI_STATE_FALLING_ASLEEP: 2493 switch(hci_stack->substate) { 2494 case HCI_FALLING_ASLEEP_DISCONNECT: 2495 log_info("HCI_STATE_FALLING_ASLEEP"); 2496 // close all open connections 2497 connection = (hci_connection_t *) hci_stack->connections; 2498 2499 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2500 // don't close connections, if H4 supports power management 2501 if (bt_control_iphone_power_management_enabled()){ 2502 connection = NULL; 2503 } 2504 #endif 2505 if (connection){ 2506 2507 // send disconnect 2508 if (!hci_can_send_command_packet_now()) return; 2509 2510 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2511 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2512 2513 // send disconnected event right away - causes higher layer connections to get closed, too. 2514 hci_shutdown_connection(connection); 2515 return; 2516 } 2517 2518 if (hci_classic_supported()){ 2519 // disable page and inquiry scan 2520 if (!hci_can_send_command_packet_now()) return; 2521 2522 log_info("HCI_STATE_HALTING, disabling inq scans"); 2523 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2524 2525 // continue in next sub state 2526 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2527 break; 2528 } 2529 // fall through for ble-only chips 2530 2531 case HCI_FALLING_ASLEEP_COMPLETE: 2532 log_info("HCI_STATE_HALTING, calling sleep"); 2533 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2534 // don't actually go to sleep, if H4 supports power management 2535 if (bt_control_iphone_power_management_enabled()){ 2536 // SLEEP MODE reached 2537 hci_stack->state = HCI_STATE_SLEEPING; 2538 hci_emit_state(); 2539 break; 2540 } 2541 #endif 2542 // switch mode 2543 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2544 hci_emit_state(); 2545 break; 2546 2547 default: 2548 break; 2549 } 2550 break; 2551 2552 default: 2553 break; 2554 } 2555 } 2556 2557 int hci_send_cmd_packet(uint8_t *packet, int size){ 2558 bd_addr_t addr; 2559 hci_connection_t * conn; 2560 // house-keeping 2561 2562 // create_connection? 2563 if (IS_COMMAND(packet, hci_create_connection)){ 2564 bt_flip_addr(addr, &packet[3]); 2565 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2566 2567 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2568 if (!conn){ 2569 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2570 if (!conn){ 2571 // notify client that alloc failed 2572 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2573 return 0; // don't sent packet to controller 2574 } 2575 conn->state = SEND_CREATE_CONNECTION; 2576 } 2577 log_info("conn state %u", conn->state); 2578 switch (conn->state){ 2579 // if connection active exists 2580 case OPEN: 2581 // and OPEN, emit connection complete command, don't send to controller 2582 hci_emit_connection_complete(conn, 0); 2583 return 0; 2584 case SEND_CREATE_CONNECTION: 2585 // connection created by hci, e.g. dedicated bonding 2586 break; 2587 default: 2588 // otherwise, just ignore as it is already in the open process 2589 return 0; 2590 } 2591 conn->state = SENT_CREATE_CONNECTION; 2592 } 2593 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2594 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2595 } 2596 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2597 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2598 } 2599 2600 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2601 if (hci_stack->remote_device_db){ 2602 bt_flip_addr(addr, &packet[3]); 2603 hci_stack->remote_device_db->delete_link_key(addr); 2604 } 2605 } 2606 2607 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2608 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2609 bt_flip_addr(addr, &packet[3]); 2610 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2611 if (conn){ 2612 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2613 } 2614 } 2615 2616 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2617 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2618 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2619 || IS_COMMAND(packet, hci_user_passkey_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, SSP_PAIRING_ACTIVE); 2624 } 2625 } 2626 2627 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2628 hci_stack->loopback_mode = packet[3]; 2629 } 2630 2631 #ifdef HAVE_BLE 2632 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2633 hci_stack->adv_addr_type = packet[8]; 2634 } 2635 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2636 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2637 } 2638 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2639 hci_stack->le_advertisements_active = packet[3]; 2640 } 2641 if (IS_COMMAND(packet, hci_le_create_connection)){ 2642 // white list used? 2643 uint8_t initiator_filter_policy = packet[7]; 2644 switch (initiator_filter_policy){ 2645 case 0: 2646 // whitelist not used 2647 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 2648 break; 2649 case 1: 2650 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 2651 break; 2652 default: 2653 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 2654 break; 2655 } 2656 } 2657 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 2658 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2659 } 2660 #endif 2661 2662 hci_stack->num_cmd_packets--; 2663 2664 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2665 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2666 2667 // release packet buffer for synchronous transport implementations 2668 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2669 hci_stack->hci_packet_buffer_reserved = 0; 2670 } 2671 2672 return err; 2673 } 2674 2675 // disconnect because of security block 2676 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2677 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2678 if (!connection) return; 2679 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2680 } 2681 2682 2683 // Configure Secure Simple Pairing 2684 2685 // enable will enable SSP during init 2686 void hci_ssp_set_enable(int enable){ 2687 hci_stack->ssp_enable = enable; 2688 } 2689 2690 int hci_local_ssp_activated(void){ 2691 return hci_ssp_supported() && hci_stack->ssp_enable; 2692 } 2693 2694 // if set, BTstack will respond to io capability request using authentication requirement 2695 void hci_ssp_set_io_capability(int io_capability){ 2696 hci_stack->ssp_io_capability = io_capability; 2697 } 2698 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2699 hci_stack->ssp_authentication_requirement = authentication_requirement; 2700 } 2701 2702 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2703 void hci_ssp_set_auto_accept(int auto_accept){ 2704 hci_stack->ssp_auto_accept = auto_accept; 2705 } 2706 2707 /** 2708 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2709 */ 2710 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2711 2712 if (!hci_can_send_command_packet_now()){ 2713 log_error("hci_send_cmd called but cannot send packet now"); 2714 return 0; 2715 } 2716 2717 // for HCI INITIALIZATION 2718 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2719 hci_stack->last_cmd_opcode = cmd->opcode; 2720 2721 hci_reserve_packet_buffer(); 2722 uint8_t * packet = hci_stack->hci_packet_buffer; 2723 2724 va_list argptr; 2725 va_start(argptr, cmd); 2726 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2727 va_end(argptr); 2728 2729 return hci_send_cmd_packet(packet, size); 2730 } 2731 2732 // Create various non-HCI events. 2733 // TODO: generalize, use table similar to hci_create_command 2734 2735 void hci_emit_state(void){ 2736 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2737 uint8_t event[3]; 2738 event[0] = BTSTACK_EVENT_STATE; 2739 event[1] = sizeof(event) - 2; 2740 event[2] = hci_stack->state; 2741 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2742 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2743 } 2744 2745 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2746 uint8_t event[13]; 2747 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2748 event[1] = sizeof(event) - 2; 2749 event[2] = status; 2750 bt_store_16(event, 3, conn->con_handle); 2751 bt_flip_addr(&event[5], conn->address); 2752 event[11] = 1; // ACL connection 2753 event[12] = 0; // encryption disabled 2754 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2755 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2756 } 2757 2758 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2759 uint8_t event[21]; 2760 event[0] = HCI_EVENT_LE_META; 2761 event[1] = sizeof(event) - 2; 2762 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2763 event[3] = status; 2764 bt_store_16(event, 4, conn_handle); 2765 event[6] = 0; // TODO: role 2766 event[7] = address_type; 2767 bt_flip_addr(&event[8], address); 2768 bt_store_16(event, 14, 0); // interval 2769 bt_store_16(event, 16, 0); // latency 2770 bt_store_16(event, 18, 0); // supervision timeout 2771 event[20] = 0; // master clock accuracy 2772 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2773 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2774 } 2775 2776 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2777 uint8_t event[6]; 2778 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2779 event[1] = sizeof(event) - 2; 2780 event[2] = 0; // status = OK 2781 bt_store_16(event, 3, handle); 2782 event[5] = reason; 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_l2cap_check_timeout(hci_connection_t *conn){ 2788 if (disable_l2cap_timeouts) return; 2789 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2790 uint8_t event[4]; 2791 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2792 event[1] = sizeof(event) - 2; 2793 bt_store_16(event, 2, conn->con_handle); 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_nr_connections_changed(void){ 2799 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2800 uint8_t event[3]; 2801 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2802 event[1] = sizeof(event) - 2; 2803 event[2] = nr_hci_connections(); 2804 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2805 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2806 } 2807 2808 void hci_emit_hci_open_failed(void){ 2809 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2810 uint8_t event[2]; 2811 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2812 event[1] = sizeof(event) - 2; 2813 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2814 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2815 } 2816 2817 #ifndef EMBEDDED 2818 void hci_emit_btstack_version(void){ 2819 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2820 uint8_t event[6]; 2821 event[0] = BTSTACK_EVENT_VERSION; 2822 event[1] = sizeof(event) - 2; 2823 event[2] = BTSTACK_MAJOR; 2824 event[3] = BTSTACK_MINOR; 2825 bt_store_16(event, 4, 3257); // last SVN commit on Google Code + 1 2826 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2827 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2828 } 2829 #endif 2830 2831 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2832 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2833 uint8_t event[3]; 2834 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2835 event[1] = sizeof(event) - 2; 2836 event[2] = enabled; 2837 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2838 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2839 } 2840 2841 void hci_emit_remote_name_cached(bd_addr_t addr, device_name_t *name){ 2842 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2843 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2844 event[1] = sizeof(event) - 2 - 1; 2845 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2846 bt_flip_addr(&event[3], addr); 2847 memcpy(&event[9], name, 248); 2848 2849 event[9+248] = 0; // assert \0 for log_info 2850 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(addr), &event[9]); 2851 2852 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2853 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2854 } 2855 2856 void hci_emit_discoverable_enabled(uint8_t enabled){ 2857 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2858 uint8_t event[3]; 2859 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2860 event[1] = sizeof(event) - 2; 2861 event[2] = enabled; 2862 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2863 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2864 } 2865 2866 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2867 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2868 uint8_t event[5]; 2869 int pos = 0; 2870 event[pos++] = GAP_SECURITY_LEVEL; 2871 event[pos++] = sizeof(event) - 2; 2872 bt_store_16(event, 2, con_handle); 2873 pos += 2; 2874 event[pos++] = level; 2875 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2876 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2877 } 2878 2879 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2880 log_info("hci_emit_dedicated_bonding_result %u ", status); 2881 uint8_t event[9]; 2882 int pos = 0; 2883 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2884 event[pos++] = sizeof(event) - 2; 2885 event[pos++] = status; 2886 bt_flip_addr( &event[pos], address); 2887 pos += 6; 2888 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2889 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2890 } 2891 2892 // query if remote side supports SSP 2893 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2894 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2895 if (!connection) return 0; 2896 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2897 } 2898 2899 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2900 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2901 } 2902 2903 // GAP API 2904 /** 2905 * @bbrief enable/disable bonding. default is enabled 2906 * @praram enabled 2907 */ 2908 void gap_set_bondable_mode(int enable){ 2909 hci_stack->bondable = enable ? 1 : 0; 2910 } 2911 /** 2912 * @brief Get bondable mode. 2913 * @return 1 if bondable 2914 */ 2915 int gap_get_bondable_mode(void){ 2916 return hci_stack->bondable; 2917 } 2918 2919 /** 2920 * @brief map link keys to security levels 2921 */ 2922 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2923 switch (link_key_type){ 2924 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2925 return LEVEL_4; 2926 case COMBINATION_KEY: 2927 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2928 return LEVEL_3; 2929 default: 2930 return LEVEL_2; 2931 } 2932 } 2933 2934 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2935 if (!connection) return LEVEL_0; 2936 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2937 return gap_security_level_for_link_key_type(connection->link_key_type); 2938 } 2939 2940 2941 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2942 log_info("gap_mitm_protection_required_for_security_level %u", level); 2943 return level > LEVEL_2; 2944 } 2945 2946 /** 2947 * @brief get current security level 2948 */ 2949 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2950 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2951 if (!connection) return LEVEL_0; 2952 return gap_security_level_for_connection(connection); 2953 } 2954 2955 /** 2956 * @brief request connection to device to 2957 * @result GAP_AUTHENTICATION_RESULT 2958 */ 2959 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2960 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2961 if (!connection){ 2962 hci_emit_security_level(con_handle, LEVEL_0); 2963 return; 2964 } 2965 gap_security_level_t current_level = gap_security_level(con_handle); 2966 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2967 if (current_level >= requested_level){ 2968 hci_emit_security_level(con_handle, current_level); 2969 return; 2970 } 2971 2972 connection->requested_security_level = requested_level; 2973 2974 #if 0 2975 // sending encryption request without a link key results in an error. 2976 // TODO: figure out how to use it properly 2977 2978 // would enabling ecnryption suffice (>= LEVEL_2)? 2979 if (hci_stack->remote_device_db){ 2980 link_key_type_t link_key_type; 2981 link_key_t link_key; 2982 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2983 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2984 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2985 return; 2986 } 2987 } 2988 } 2989 #endif 2990 2991 // try to authenticate connection 2992 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2993 hci_run(); 2994 } 2995 2996 /** 2997 * @brief start dedicated bonding with device. disconnect after bonding 2998 * @param device 2999 * @param request MITM protection 3000 * @result GAP_DEDICATED_BONDING_COMPLETE 3001 */ 3002 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3003 3004 // create connection state machine 3005 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3006 3007 if (!connection){ 3008 return BTSTACK_MEMORY_ALLOC_FAILED; 3009 } 3010 3011 // delete linkn key 3012 hci_drop_link_key_for_bd_addr(device); 3013 3014 // configure LEVEL_2/3, dedicated bonding 3015 connection->state = SEND_CREATE_CONNECTION; 3016 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3017 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 3018 connection->bonding_flags = BONDING_DEDICATED; 3019 3020 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3021 3022 // handle: connnection failure (connection complete != ok) 3023 // handle: authentication failure 3024 // handle: disconnect on done 3025 3026 hci_run(); 3027 3028 return 0; 3029 } 3030 3031 void gap_set_local_name(const char * local_name){ 3032 hci_stack->local_name = local_name; 3033 } 3034 3035 le_command_status_t le_central_start_scan(void){ 3036 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 3037 hci_stack->le_scanning_state = LE_START_SCAN; 3038 hci_run(); 3039 return BLE_PERIPHERAL_OK; 3040 } 3041 3042 le_command_status_t le_central_stop_scan(void){ 3043 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 3044 hci_stack->le_scanning_state = LE_STOP_SCAN; 3045 hci_run(); 3046 return BLE_PERIPHERAL_OK; 3047 } 3048 3049 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3050 hci_stack->le_scan_type = scan_type; 3051 hci_stack->le_scan_interval = scan_interval; 3052 hci_stack->le_scan_window = scan_window; 3053 hci_run(); 3054 } 3055 3056 le_command_status_t le_central_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3057 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3058 if (!conn){ 3059 log_info("le_central_connect: no connection exists yet, creating context"); 3060 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3061 if (!conn){ 3062 // notify client that alloc failed 3063 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3064 log_info("le_central_connect: failed to alloc hci_connection_t"); 3065 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 3066 } 3067 conn->state = SEND_CREATE_CONNECTION; 3068 log_info("le_central_connect: send create connection next"); 3069 hci_run(); 3070 return BLE_PERIPHERAL_OK; 3071 } 3072 3073 if (!hci_is_le_connection(conn) || 3074 conn->state == SEND_CREATE_CONNECTION || 3075 conn->state == SENT_CREATE_CONNECTION) { 3076 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3077 log_error("le_central_connect: classic connection or connect is already being created"); 3078 return BLE_PERIPHERAL_IN_WRONG_STATE; 3079 } 3080 3081 log_info("le_central_connect: context exists with state %u", conn->state); 3082 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3083 hci_run(); 3084 return BLE_PERIPHERAL_OK; 3085 } 3086 3087 // @assumption: only a single outgoing LE Connection exists 3088 static hci_connection_t * le_central_get_outgoing_connection(void){ 3089 linked_item_t *it; 3090 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 3091 hci_connection_t * conn = (hci_connection_t *) it; 3092 if (!hci_is_le_connection(conn)) continue; 3093 switch (conn->state){ 3094 case SEND_CREATE_CONNECTION: 3095 case SENT_CREATE_CONNECTION: 3096 return conn; 3097 default: 3098 break; 3099 }; 3100 } 3101 return NULL; 3102 } 3103 3104 le_command_status_t le_central_connect_cancel(void){ 3105 hci_connection_t * conn = le_central_get_outgoing_connection(); 3106 if (!conn) return BLE_PERIPHERAL_OK; 3107 switch (conn->state){ 3108 case SEND_CREATE_CONNECTION: 3109 // skip sending create connection and emit event instead 3110 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3111 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 3112 btstack_memory_hci_connection_free( conn ); 3113 break; 3114 case SENT_CREATE_CONNECTION: 3115 // request to send cancel connection 3116 conn->state = SEND_CANCEL_CONNECTION; 3117 hci_run(); 3118 break; 3119 default: 3120 break; 3121 } 3122 return BLE_PERIPHERAL_OK; 3123 } 3124 3125 /** 3126 * @brief Updates the connection parameters for a given LE connection 3127 * @param handle 3128 * @param conn_interval_min (unit: 1.25ms) 3129 * @param conn_interval_max (unit: 1.25ms) 3130 * @param conn_latency 3131 * @param supervision_timeout (unit: 10ms) 3132 * @returns 0 if ok 3133 */ 3134 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3135 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3136 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3137 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3138 connection->le_conn_interval_min = conn_interval_min; 3139 connection->le_conn_interval_max = conn_interval_max; 3140 connection->le_conn_latency = conn_latency; 3141 connection->le_supervision_timeout = supervision_timeout; 3142 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3143 hci_run(); 3144 return 0; 3145 } 3146 3147 /** 3148 * @brief Request an update of the connection parameter for a given LE connection 3149 * @param handle 3150 * @param conn_interval_min (unit: 1.25ms) 3151 * @param conn_interval_max (unit: 1.25ms) 3152 * @param conn_latency 3153 * @param supervision_timeout (unit: 10ms) 3154 * @returns 0 if ok 3155 */ 3156 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3157 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3158 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3159 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3160 connection->le_conn_interval_min = conn_interval_min; 3161 connection->le_conn_interval_max = conn_interval_max; 3162 connection->le_conn_latency = conn_latency; 3163 connection->le_supervision_timeout = supervision_timeout; 3164 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3165 hci_run(); 3166 return 0; 3167 } 3168 3169 /** 3170 * @brief Set Advertisement Data 3171 * @param advertising_data_length 3172 * @param advertising_data (max 31 octets) 3173 * @note data is not copied, pointer has to stay valid 3174 */ 3175 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3176 hci_stack->le_advertisements_data_len = advertising_data_length; 3177 hci_stack->le_advertisements_data = advertising_data; 3178 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_DATA; 3179 // disable advertisements before setting data 3180 if (hci_stack->le_advertisements_active){ 3181 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3182 } 3183 hci_run(); 3184 } 3185 3186 /** 3187 * @brief Set Advertisement Parameters 3188 * @param adv_int_min 3189 * @param adv_int_max 3190 * @param adv_type 3191 * @param own_address_type 3192 * @param direct_address_type 3193 * @param direct_address 3194 * @param channel_map 3195 * @param filter_policy 3196 * 3197 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3198 */ 3199 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3200 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3201 uint8_t channel_map, uint8_t filter_policy) { 3202 3203 hci_stack->le_advertisements_interval_min = adv_int_min; 3204 hci_stack->le_advertisements_interval_max = adv_int_max; 3205 hci_stack->le_advertisements_type = adv_type; 3206 hci_stack->le_advertisements_own_address_type = own_address_type; 3207 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3208 hci_stack->le_advertisements_channel_map = channel_map; 3209 hci_stack->le_advertisements_filter_policy = filter_policy; 3210 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3211 3212 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3213 // disable advertisements before changing params 3214 if (hci_stack->le_advertisements_active){ 3215 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3216 } 3217 hci_run(); 3218 } 3219 3220 /** 3221 * @brief Enable/Disable Advertisements 3222 * @param enabled 3223 */ 3224 void gap_advertisements_enable(int enabled){ 3225 hci_stack->le_advertisements_enabled = enabled; 3226 if (enabled && !hci_stack->le_advertisements_active){ 3227 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3228 } 3229 if (!enabled && hci_stack->le_advertisements_active){ 3230 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3231 } 3232 hci_run(); 3233 } 3234 3235 3236 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 3237 hci_connection_t * conn = hci_connection_for_handle(handle); 3238 if (!conn){ 3239 hci_emit_disconnection_complete(handle, 0); 3240 return BLE_PERIPHERAL_OK; 3241 } 3242 conn->state = SEND_DISCONNECT; 3243 hci_run(); 3244 return BLE_PERIPHERAL_OK; 3245 } 3246 3247 /** 3248 * @brief Get connection type 3249 * @param con_handle 3250 * @result connection_type 3251 */ 3252 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3253 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3254 if (!conn) return GAP_CONNECTION_INVALID; 3255 switch (conn->address_type){ 3256 case BD_ADDR_TYPE_LE_PUBLIC: 3257 case BD_ADDR_TYPE_LE_RANDOM: 3258 return GAP_CONNECTION_LE; 3259 case BD_ADDR_TYPE_SCO: 3260 return GAP_CONNECTION_SCO; 3261 case BD_ADDR_TYPE_CLASSIC: 3262 return GAP_CONNECTION_ACL; 3263 default: 3264 return GAP_CONNECTION_INVALID; 3265 } 3266 } 3267 3268 #ifdef HAVE_BLE 3269 3270 /** 3271 * @brief Auto Connection Establishment - Start Connecting to device 3272 * @param address_typ 3273 * @param address 3274 * @returns 0 if ok 3275 */ 3276 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3277 // check capacity 3278 int num_entries = linked_list_count(&hci_stack->le_whitelist); 3279 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3280 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3281 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3282 entry->address_type = address_type; 3283 memcpy(entry->address, address, 6); 3284 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3285 linked_list_add(&hci_stack->le_whitelist, (linked_item_t*) entry); 3286 hci_run(); 3287 return 0; 3288 } 3289 3290 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3291 linked_list_iterator_t it; 3292 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3293 while (linked_list_iterator_has_next(&it)){ 3294 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3295 if (entry->address_type != address_type) continue; 3296 if (memcmp(entry->address, address, 6) != 0) continue; 3297 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3298 // remove from controller if already present 3299 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3300 continue; 3301 } 3302 // direclty remove entry from whitelist 3303 linked_list_iterator_remove(&it); 3304 btstack_memory_whitelist_entry_free(entry); 3305 } 3306 } 3307 3308 /** 3309 * @brief Auto Connection Establishment - Stop Connecting to device 3310 * @param address_typ 3311 * @param address 3312 * @returns 0 if ok 3313 */ 3314 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3315 hci_remove_from_whitelist(address_type, address); 3316 hci_run(); 3317 return 0; 3318 } 3319 3320 /** 3321 * @brief Auto Connection Establishment - Stop everything 3322 * @note Convenience function to stop all active auto connection attempts 3323 */ 3324 void gap_auto_connection_stop_all(void){ 3325 linked_list_iterator_t it; 3326 linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3327 while (linked_list_iterator_has_next(&it)){ 3328 whitelist_entry_t * entry = (whitelist_entry_t*) linked_list_iterator_next(&it); 3329 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3330 // remove from controller if already present 3331 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3332 continue; 3333 } 3334 // directly remove entry from whitelist 3335 linked_list_iterator_remove(&it); 3336 btstack_memory_whitelist_entry_free(entry); 3337 } 3338 hci_run(); 3339 } 3340 3341 #endif 3342 3343 /** 3344 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3345 */ 3346 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3347 hci_stack->sco_voice_setting = voice_setting; 3348 } 3349 3350 /** 3351 * @brief Get SCO Voice Setting 3352 * @return current voice setting 3353 */ 3354 uint16_t hci_get_sco_voice_setting(){ 3355 return hci_stack->sco_voice_setting; 3356 } 3357 3358 /** 3359 * @brief Set callback for Bluetooth Hardware Error 3360 */ 3361 void hci_set_hardware_error_callback(void (*fn)(void)){ 3362 hci_stack->hardware_error_callback = fn; 3363 } 3364 3365 3366 void hci_disconnect_all(void){ 3367 linked_list_iterator_t it; 3368 linked_list_iterator_init(&it, &hci_stack->connections); 3369 while (linked_list_iterator_has_next(&it)){ 3370 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 3371 if (con->state == SENT_DISCONNECT) continue; 3372 con->state = SEND_DISCONNECT; 3373 } 3374 hci_run(); 3375 } 3376