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 48 #ifdef ENABLE_CLASSIC 49 #ifdef HAVE_EMBEDDED_TICK 50 #include "btstack_run_loop_embedded.h" 51 #endif 52 #endif 53 54 #ifdef HAVE_PLATFORM_IPHONE_OS 55 #include "../port/ios/src/btstack_control_iphone.h" 56 #endif 57 58 #ifdef ENABLE_BLE 59 #include "gap.h" 60 #endif 61 62 #include <stdarg.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <inttypes.h> 66 67 #include "btstack_debug.h" 68 #include "btstack_event.h" 69 #include "btstack_linked_list.h" 70 #include "btstack_memory.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 76 77 #define HCI_CONNECTION_TIMEOUT_MS 10000 78 #define HCI_RESET_RESEND_TIMEOUT_MS 200 79 80 // prototypes 81 #ifdef ENABLE_CLASSIC 82 static void hci_update_scan_enable(void); 83 static void hci_emit_discoverable_enabled(uint8_t enabled); 84 static int hci_local_ssp_activated(void); 85 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 86 static void hci_notify_if_sco_can_send_now(void); 87 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 88 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 89 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 90 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 91 static void hci_connection_timestamp(hci_connection_t *connection); 92 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 93 #endif 94 static int hci_power_control_on(void); 95 static void hci_power_control_off(void); 96 static void hci_state_reset(void); 97 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 98 static void hci_emit_nr_connections_changed(void); 99 static void hci_emit_hci_open_failed(void); 100 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 101 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 102 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 103 static void hci_run(void); 104 static int hci_is_le_connection(hci_connection_t * connection); 105 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 106 107 #ifdef ENABLE_BLE 108 #ifdef ENABLE_LE_CENTRAL 109 // called from test/ble_client/advertising_data_parser.c 110 void le_handle_advertisement_report(uint8_t *packet, int size); 111 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 112 #endif 113 #endif 114 115 // the STACK is here 116 #ifndef HAVE_MALLOC 117 static hci_stack_t hci_stack_static; 118 #endif 119 static hci_stack_t * hci_stack = NULL; 120 121 #ifdef ENABLE_CLASSIC 122 // test helper 123 static uint8_t disable_l2cap_timeouts = 0; 124 #endif 125 126 /** 127 * create connection for given address 128 * 129 * @return connection OR NULL, if no memory left 130 */ 131 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 132 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 133 hci_connection_t * conn = btstack_memory_hci_connection_get(); 134 if (!conn) return NULL; 135 memset(conn, 0, sizeof(hci_connection_t)); 136 bd_addr_copy(conn->address, addr); 137 conn->address_type = addr_type; 138 conn->con_handle = 0xffff; 139 conn->authentication_flags = AUTH_FLAGS_NONE; 140 conn->bonding_flags = 0; 141 conn->requested_security_level = LEVEL_0; 142 #ifdef ENABLE_CLASSIC 143 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 144 btstack_run_loop_set_timer_context(&conn->timeout, conn); 145 hci_connection_timestamp(conn); 146 #endif 147 conn->acl_recombination_length = 0; 148 conn->acl_recombination_pos = 0; 149 conn->num_acl_packets_sent = 0; 150 conn->num_sco_packets_sent = 0; 151 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 152 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 153 return conn; 154 } 155 156 157 /** 158 * get le connection parameter range 159 * 160 * @return le connection parameter range struct 161 */ 162 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 163 *range = hci_stack->le_connection_parameter_range; 164 } 165 166 /** 167 * set le connection parameter range 168 * 169 */ 170 171 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 172 hci_stack->le_connection_parameter_range = *range; 173 } 174 175 /** 176 * get hci connections iterator 177 * 178 * @return hci connections iterator 179 */ 180 181 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 182 btstack_linked_list_iterator_init(it, &hci_stack->connections); 183 } 184 185 /** 186 * get connection for a given handle 187 * 188 * @return connection OR NULL, if not found 189 */ 190 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 191 btstack_linked_list_iterator_t it; 192 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 193 while (btstack_linked_list_iterator_has_next(&it)){ 194 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 195 if ( item->con_handle == con_handle ) { 196 return item; 197 } 198 } 199 return NULL; 200 } 201 202 /** 203 * get connection for given address 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if (connection->address_type != addr_type) continue; 213 if (memcmp(addr, connection->address, 6) != 0) continue; 214 return connection; 215 } 216 return NULL; 217 } 218 219 220 #ifdef ENABLE_CLASSIC 221 222 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 223 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 224 #ifdef HAVE_EMBEDDED_TICK 225 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 226 // connections might be timed out 227 hci_emit_l2cap_check_timeout(connection); 228 } 229 #else 230 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 231 // connections might be timed out 232 hci_emit_l2cap_check_timeout(connection); 233 } 234 #endif 235 } 236 237 static void hci_connection_timestamp(hci_connection_t *connection){ 238 #ifdef HAVE_EMBEDDED_TICK 239 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 240 #else 241 connection->timestamp = btstack_run_loop_get_time_ms(); 242 #endif 243 } 244 245 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 246 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 247 } 248 249 250 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 251 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 252 } 253 254 /** 255 * add authentication flags and reset timer 256 * @note: assumes classic connection 257 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 258 */ 259 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 260 bd_addr_t addr; 261 reverse_bd_addr(bd_addr, addr); 262 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 263 if (conn) { 264 connectionSetAuthenticationFlags(conn, flags); 265 hci_connection_timestamp(conn); 266 } 267 } 268 269 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 270 hci_connection_t * conn = hci_connection_for_handle(handle); 271 if (!conn) return 0; 272 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 273 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 274 return 0; 275 } 276 277 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 278 if (!hci_stack->link_key_db) return; 279 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 280 hci_stack->link_key_db->delete_link_key(addr); 281 } 282 283 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 284 if (!hci_stack->link_key_db) return; 285 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 286 hci_stack->link_key_db->put_link_key(addr, link_key, type); 287 } 288 #endif 289 290 static int hci_is_le_connection(hci_connection_t * connection){ 291 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 292 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 293 } 294 295 /** 296 * count connections 297 */ 298 static int nr_hci_connections(void){ 299 int count = 0; 300 btstack_linked_item_t *it; 301 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 302 return count; 303 } 304 305 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 306 307 unsigned int num_packets_sent_classic = 0; 308 unsigned int num_packets_sent_le = 0; 309 310 btstack_linked_item_t *it; 311 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 312 hci_connection_t * connection = (hci_connection_t *) it; 313 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 314 num_packets_sent_classic += connection->num_acl_packets_sent; 315 } else { 316 num_packets_sent_le += connection->num_acl_packets_sent; 317 } 318 } 319 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 320 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 321 int free_slots_le = 0; 322 323 if (free_slots_classic < 0){ 324 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); 325 return 0; 326 } 327 328 if (hci_stack->le_acl_packets_total_num){ 329 // if we have LE slots, they are used 330 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 331 if (free_slots_le < 0){ 332 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); 333 return 0; 334 } 335 } else { 336 // otherwise, classic slots are used for LE, too 337 free_slots_classic -= num_packets_sent_le; 338 if (free_slots_classic < 0){ 339 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); 340 return 0; 341 } 342 } 343 344 switch (address_type){ 345 case BD_ADDR_TYPE_UNKNOWN: 346 log_error("hci_number_free_acl_slots: unknown address type"); 347 return 0; 348 349 case BD_ADDR_TYPE_CLASSIC: 350 return free_slots_classic; 351 352 default: 353 if (hci_stack->le_acl_packets_total_num){ 354 return free_slots_le; 355 } 356 return free_slots_classic; 357 } 358 } 359 360 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 361 // get connection type 362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 363 if (!connection){ 364 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 365 return 0; 366 } 367 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 368 } 369 370 #ifdef ENABLE_CLASSIC 371 static int hci_number_free_sco_slots(void){ 372 unsigned int num_sco_packets_sent = 0; 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 num_sco_packets_sent += connection->num_sco_packets_sent; 377 } 378 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 379 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 380 return 0; 381 } 382 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 383 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 384 } 385 #endif 386 387 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 388 int hci_can_send_command_packet_now(void){ 389 if (hci_stack->hci_packet_buffer_reserved) return 0; 390 391 // check for async hci transport implementations 392 if (hci_stack->hci_transport->can_send_packet_now){ 393 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 394 return 0; 395 } 396 } 397 398 return hci_stack->num_cmd_packets > 0; 399 } 400 401 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 402 // check for async hci transport implementations 403 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 404 return hci_stack->hci_transport->can_send_packet_now(packet_type); 405 } 406 407 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 410 } 411 412 int hci_can_send_acl_le_packet_now(void){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 415 } 416 417 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 418 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 419 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 420 } 421 422 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 423 if (hci_stack->hci_packet_buffer_reserved) return 0; 424 return hci_can_send_prepared_acl_packet_now(con_handle); 425 } 426 427 #ifdef ENABLE_CLASSIC 428 int hci_can_send_acl_classic_packet_now(void){ 429 if (hci_stack->hci_packet_buffer_reserved) return 0; 430 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 431 } 432 433 int hci_can_send_prepared_sco_packet_now(void){ 434 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 435 if (!hci_stack->synchronous_flow_control_enabled) return 1; 436 return hci_number_free_sco_slots() > 0; 437 } 438 439 int hci_can_send_sco_packet_now(void){ 440 if (hci_stack->hci_packet_buffer_reserved) return 0; 441 return hci_can_send_prepared_sco_packet_now(); 442 } 443 444 void hci_request_sco_can_send_now_event(void){ 445 hci_stack->sco_waiting_for_can_send_now = 1; 446 hci_notify_if_sco_can_send_now(); 447 } 448 #endif 449 450 // used for internal checks in l2cap.c 451 int hci_is_packet_buffer_reserved(void){ 452 return hci_stack->hci_packet_buffer_reserved; 453 } 454 455 // reserves outgoing packet buffer. @returns 1 if successful 456 int hci_reserve_packet_buffer(void){ 457 if (hci_stack->hci_packet_buffer_reserved) { 458 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 459 return 0; 460 } 461 hci_stack->hci_packet_buffer_reserved = 1; 462 return 1; 463 } 464 465 void hci_release_packet_buffer(void){ 466 hci_stack->hci_packet_buffer_reserved = 0; 467 } 468 469 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 470 static int hci_transport_synchronous(void){ 471 return hci_stack->hci_transport->can_send_packet_now == NULL; 472 } 473 474 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 475 476 // 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); 477 478 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 479 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 480 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 481 max_acl_data_packet_length = hci_stack->le_data_packets_length; 482 } 483 484 // testing: reduce buffer to minimum 485 // max_acl_data_packet_length = 52; 486 487 log_debug("hci_send_acl_packet_fragments entered"); 488 489 int err; 490 // multiple packets could be send on a synchronous HCI transport 491 while (1){ 492 493 log_debug("hci_send_acl_packet_fragments loop entered"); 494 495 // get current data 496 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 497 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 498 int more_fragments = 0; 499 500 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 501 if (current_acl_data_packet_length > max_acl_data_packet_length){ 502 more_fragments = 1; 503 current_acl_data_packet_length = max_acl_data_packet_length; 504 } 505 506 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 507 if (acl_header_pos > 0){ 508 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 509 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 510 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 511 } 512 513 // update header len 514 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 515 516 // count packet 517 connection->num_acl_packets_sent++; 518 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 519 520 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 521 if (more_fragments){ 522 // update start of next fragment to send 523 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 524 } else { 525 // done 526 hci_stack->acl_fragmentation_pos = 0; 527 hci_stack->acl_fragmentation_total_size = 0; 528 } 529 530 // send packet 531 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 532 const int size = current_acl_data_packet_length + 4; 533 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 534 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 535 536 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 537 538 // done yet? 539 if (!more_fragments) break; 540 541 // can send more? 542 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 543 } 544 545 log_debug("hci_send_acl_packet_fragments loop over"); 546 547 // release buffer now for synchronous transport 548 if (hci_transport_synchronous()){ 549 hci_release_packet_buffer(); 550 // notify upper stack that it might be possible to send again 551 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 552 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 553 } 554 555 return err; 556 } 557 558 // pre: caller has reserved the packet buffer 559 int hci_send_acl_packet_buffer(int size){ 560 561 // log_info("hci_send_acl_packet_buffer size %u", size); 562 563 if (!hci_stack->hci_packet_buffer_reserved) { 564 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 565 return 0; 566 } 567 568 uint8_t * packet = hci_stack->hci_packet_buffer; 569 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 570 571 // check for free places on Bluetooth module 572 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 573 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 574 hci_release_packet_buffer(); 575 return BTSTACK_ACL_BUFFERS_FULL; 576 } 577 578 hci_connection_t *connection = hci_connection_for_handle( con_handle); 579 if (!connection) { 580 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 581 hci_release_packet_buffer(); 582 return 0; 583 } 584 585 #ifdef ENABLE_CLASSIC 586 hci_connection_timestamp(connection); 587 #endif 588 589 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 590 591 // setup data 592 hci_stack->acl_fragmentation_total_size = size; 593 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 594 595 return hci_send_acl_packet_fragments(connection); 596 } 597 598 #ifdef ENABLE_CLASSIC 599 // pre: caller has reserved the packet buffer 600 int hci_send_sco_packet_buffer(int size){ 601 602 // log_info("hci_send_acl_packet_buffer size %u", size); 603 604 if (!hci_stack->hci_packet_buffer_reserved) { 605 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 606 return 0; 607 } 608 609 uint8_t * packet = hci_stack->hci_packet_buffer; 610 611 // skip checks in loopback mode 612 if (!hci_stack->loopback_mode){ 613 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 614 615 // check for free places on Bluetooth module 616 if (!hci_can_send_prepared_sco_packet_now()) { 617 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 618 hci_release_packet_buffer(); 619 return BTSTACK_ACL_BUFFERS_FULL; 620 } 621 622 // track send packet in connection struct 623 hci_connection_t *connection = hci_connection_for_handle( con_handle); 624 if (!connection) { 625 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 626 hci_release_packet_buffer(); 627 return 0; 628 } 629 connection->num_sco_packets_sent++; 630 } 631 632 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 633 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 634 635 if (hci_transport_synchronous()){ 636 hci_release_packet_buffer(); 637 // notify upper stack that it might be possible to send again 638 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 639 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 640 } 641 642 return err; 643 } 644 #endif 645 646 static void acl_handler(uint8_t *packet, int size){ 647 648 // log_info("acl_handler: size %u", size); 649 650 // get info 651 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 652 hci_connection_t *conn = hci_connection_for_handle(con_handle); 653 uint8_t acl_flags = READ_ACL_FLAGS(packet); 654 uint16_t acl_length = READ_ACL_LENGTH(packet); 655 656 // ignore non-registered handle 657 if (!conn){ 658 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 659 return; 660 } 661 662 // assert packet is complete 663 if (acl_length + 4 != size){ 664 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 665 return; 666 } 667 668 #ifdef ENABLE_CLASSIC 669 // update idle timestamp 670 hci_connection_timestamp(conn); 671 #endif 672 673 // handle different packet types 674 switch (acl_flags & 0x03) { 675 676 case 0x01: // continuation fragment 677 678 // sanity checks 679 if (conn->acl_recombination_pos == 0) { 680 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 681 return; 682 } 683 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 684 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 685 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 686 conn->acl_recombination_pos = 0; 687 return; 688 } 689 690 // append fragment payload (header already stored) 691 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 692 conn->acl_recombination_pos += acl_length; 693 694 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 695 // conn->acl_recombination_pos, conn->acl_recombination_length); 696 697 // forward complete L2CAP packet if complete. 698 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 699 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 700 // reset recombination buffer 701 conn->acl_recombination_length = 0; 702 conn->acl_recombination_pos = 0; 703 } 704 break; 705 706 case 0x02: { // first fragment 707 708 // sanity check 709 if (conn->acl_recombination_pos) { 710 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 711 conn->acl_recombination_pos = 0; 712 } 713 714 // peek into L2CAP packet! 715 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 716 717 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 718 719 // compare fragment size to L2CAP packet size 720 if (acl_length >= l2cap_length + 4){ 721 // forward fragment as L2CAP packet 722 hci_emit_acl_packet(packet, acl_length + 4); 723 } else { 724 725 if (acl_length > HCI_ACL_BUFFER_SIZE){ 726 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 727 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 728 return; 729 } 730 731 // store first fragment and tweak acl length for complete package 732 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 733 conn->acl_recombination_pos = acl_length + 4; 734 conn->acl_recombination_length = l2cap_length; 735 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 736 } 737 break; 738 739 } 740 default: 741 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 742 return; 743 } 744 745 // execute main loop 746 hci_run(); 747 } 748 749 static void hci_shutdown_connection(hci_connection_t *conn){ 750 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 751 752 btstack_run_loop_remove_timer(&conn->timeout); 753 754 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 755 btstack_memory_hci_connection_free( conn ); 756 757 // now it's gone 758 hci_emit_nr_connections_changed(); 759 } 760 761 #ifdef ENABLE_CLASSIC 762 763 static const uint16_t packet_type_sizes[] = { 764 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 765 HCI_ACL_DH1_SIZE, 0, 0, 0, 766 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 767 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 768 }; 769 static const uint8_t packet_type_feature_requirement_bit[] = { 770 0, // 3 slot packets 771 1, // 5 slot packets 772 25, // EDR 2 mpbs 773 26, // EDR 3 mbps 774 39, // 3 slot EDR packts 775 40, // 5 slot EDR packet 776 }; 777 static const uint16_t packet_type_feature_packet_mask[] = { 778 0x0f00, // 3 slot packets 779 0xf000, // 5 slot packets 780 0x1102, // EDR 2 mpbs 781 0x2204, // EDR 3 mbps 782 0x0300, // 3 slot EDR packts 783 0x3000, // 5 slot EDR packet 784 }; 785 786 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 787 // enable packet types based on size 788 uint16_t packet_types = 0; 789 unsigned int i; 790 for (i=0;i<16;i++){ 791 if (packet_type_sizes[i] == 0) continue; 792 if (packet_type_sizes[i] <= buffer_size){ 793 packet_types |= 1 << i; 794 } 795 } 796 // disable packet types due to missing local supported features 797 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 798 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 799 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 800 if (feature_set) continue; 801 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 802 packet_types &= ~packet_type_feature_packet_mask[i]; 803 } 804 // flip bits for "may not be used" 805 packet_types ^= 0x3306; 806 return packet_types; 807 } 808 809 uint16_t hci_usable_acl_packet_types(void){ 810 return hci_stack->packet_types; 811 } 812 #endif 813 814 uint8_t* hci_get_outgoing_packet_buffer(void){ 815 // hci packet buffer is >= acl data packet length 816 return hci_stack->hci_packet_buffer; 817 } 818 819 uint16_t hci_max_acl_data_packet_length(void){ 820 return hci_stack->acl_data_packet_length; 821 } 822 823 #ifdef ENABLE_CLASSIC 824 int hci_extended_sco_link_supported(void){ 825 // No. 31, byte 3, bit 7 826 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 827 } 828 #endif 829 830 int hci_non_flushable_packet_boundary_flag_supported(void){ 831 // No. 54, byte 6, bit 6 832 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 833 } 834 835 static int gap_ssp_supported(void){ 836 // No. 51, byte 6, bit 3 837 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 838 } 839 840 static int hci_classic_supported(void){ 841 #ifdef ENABLE_CLASSIC 842 // No. 37, byte 4, bit 5, = No BR/EDR Support 843 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 844 #else 845 return 0; 846 #endif 847 } 848 849 static int hci_le_supported(void){ 850 #ifdef ENABLE_BLE 851 // No. 37, byte 4, bit 6 = LE Supported (Controller) 852 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 853 #else 854 return 0; 855 #endif 856 } 857 858 // get addr type and address used in advertisement packets 859 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 860 *addr_type = hci_stack->adv_addr_type; 861 if (hci_stack->adv_addr_type){ 862 memcpy(addr, hci_stack->adv_address, 6); 863 } else { 864 memcpy(addr, hci_stack->local_bd_addr, 6); 865 } 866 } 867 868 #ifdef ENABLE_BLE 869 #ifdef ENABLE_LE_CENTRAL 870 void le_handle_advertisement_report(uint8_t *packet, int size){ 871 872 UNUSED(size); 873 874 int offset = 3; 875 int num_reports = packet[offset]; 876 offset += 1; 877 878 int i; 879 // log_info("HCI: handle adv report with num reports: %d", num_reports); 880 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 881 for (i=0; i<num_reports;i++){ 882 uint8_t data_length = packet[offset + 8]; 883 uint8_t event_size = 10 + data_length; 884 int pos = 0; 885 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 886 event[pos++] = event_size; 887 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 888 offset += 8; 889 pos += 8; 890 event[pos++] = packet[offset + 1 + data_length]; // rssi 891 event[pos++] = packet[offset++]; //data_length; 892 memcpy(&event[pos], &packet[offset], data_length); 893 pos += data_length; 894 offset += data_length + 1; // rssi 895 hci_emit_event(event, pos, 1); 896 } 897 } 898 #endif 899 #endif 900 901 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 902 903 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 904 if (!hci_stack->config) return 0; 905 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 906 // Limit baud rate for Broadcom chipsets to 3 mbps 907 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 908 baud_rate = 3000000; 909 } 910 return baud_rate; 911 } 912 913 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 914 UNUSED(ds); 915 916 switch (hci_stack->substate){ 917 case HCI_INIT_W4_SEND_RESET: 918 log_info("Resend HCI Reset"); 919 hci_stack->substate = HCI_INIT_SEND_RESET; 920 hci_stack->num_cmd_packets = 1; 921 hci_run(); 922 break; 923 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 924 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 925 if (hci_stack->hci_transport->reset_link){ 926 hci_stack->hci_transport->reset_link(); 927 } 928 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 929 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 930 log_info("Resend HCI Reset - CSR Warm Boot"); 931 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 932 hci_stack->num_cmd_packets = 1; 933 hci_run(); 934 break; 935 case HCI_INIT_W4_SEND_BAUD_CHANGE: 936 if (hci_stack->hci_transport->set_baudrate){ 937 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 938 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 939 hci_stack->hci_transport->set_baudrate(baud_rate); 940 } 941 // For CSR, HCI Reset is sent on new baud rate 942 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 943 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 944 hci_run(); 945 } 946 break; 947 default: 948 break; 949 } 950 } 951 #endif 952 953 static void hci_initializing_next_state(void){ 954 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 955 } 956 957 // assumption: hci_can_send_command_packet_now() == true 958 static void hci_initializing_run(void){ 959 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 960 switch (hci_stack->substate){ 961 case HCI_INIT_SEND_RESET: 962 hci_state_reset(); 963 964 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 965 // prepare reset if command complete not received in 100ms 966 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 967 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 968 btstack_run_loop_add_timer(&hci_stack->timeout); 969 #endif 970 // send command 971 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 972 hci_send_cmd(&hci_reset); 973 break; 974 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 975 hci_send_cmd(&hci_read_local_version_information); 976 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 977 break; 978 case HCI_INIT_SEND_READ_LOCAL_NAME: 979 hci_send_cmd(&hci_read_local_name); 980 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 981 break; 982 983 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 984 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 985 hci_state_reset(); 986 // prepare reset if command complete not received in 100ms 987 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 988 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 989 btstack_run_loop_add_timer(&hci_stack->timeout); 990 // send command 991 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 992 hci_send_cmd(&hci_reset); 993 break; 994 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 995 hci_state_reset(); 996 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 997 hci_send_cmd(&hci_reset); 998 break; 999 case HCI_INIT_SEND_BAUD_CHANGE: { 1000 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1001 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1002 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1003 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1004 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1005 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1006 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1007 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1008 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1009 btstack_run_loop_add_timer(&hci_stack->timeout); 1010 } 1011 break; 1012 } 1013 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1014 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1015 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1016 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1017 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1018 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1019 break; 1020 } 1021 case HCI_INIT_CUSTOM_INIT: 1022 // Custom initialization 1023 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1024 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1025 if (valid_cmd){ 1026 int size = 3 + hci_stack->hci_packet_buffer[2]; 1027 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1028 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1029 switch (valid_cmd) { 1030 case 1: 1031 default: 1032 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1033 break; 1034 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1035 log_info("CSR Warm Boot"); 1036 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1037 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1038 btstack_run_loop_add_timer(&hci_stack->timeout); 1039 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1040 && hci_stack->config 1041 && hci_stack->chipset 1042 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1043 && hci_stack->hci_transport->set_baudrate 1044 && hci_transport_uart_get_main_baud_rate()){ 1045 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1046 } else { 1047 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1048 } 1049 break; 1050 } 1051 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1052 break; 1053 } 1054 log_info("Init script done"); 1055 1056 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1057 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1058 int need_baud_change = hci_stack->config 1059 && hci_stack->chipset 1060 && hci_stack->chipset->set_baudrate_command 1061 && hci_stack->hci_transport->set_baudrate 1062 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1063 if (need_baud_change) { 1064 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1065 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1066 hci_stack->hci_transport->set_baudrate(baud_rate); 1067 } 1068 } 1069 } 1070 // otherwise continue 1071 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1072 hci_send_cmd(&hci_read_local_supported_commands); 1073 break; 1074 case HCI_INIT_SET_BD_ADDR: 1075 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1076 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1077 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1078 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1079 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1080 break; 1081 #endif 1082 1083 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1084 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1085 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1086 hci_send_cmd(&hci_read_local_supported_commands); 1087 break; 1088 case HCI_INIT_READ_BD_ADDR: 1089 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1090 hci_send_cmd(&hci_read_bd_addr); 1091 break; 1092 case HCI_INIT_READ_BUFFER_SIZE: 1093 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1094 hci_send_cmd(&hci_read_buffer_size); 1095 break; 1096 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1097 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1098 hci_send_cmd(&hci_read_local_supported_features); 1099 break; 1100 case HCI_INIT_SET_EVENT_MASK: 1101 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1102 if (hci_le_supported()){ 1103 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1104 } else { 1105 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1106 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1107 } 1108 break; 1109 #ifdef ENABLE_CLASSIC 1110 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1111 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1112 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1113 break; 1114 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1115 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1116 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1117 break; 1118 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1119 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1120 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1121 break; 1122 case HCI_INIT_WRITE_LOCAL_NAME: 1123 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1124 if (hci_stack->local_name){ 1125 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1126 } else { 1127 char local_name[8+17+1]; 1128 // BTstack 11:22:33:44:55:66 1129 memcpy(local_name, "BTstack ", 8); 1130 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1131 local_name[8+17] = '\0'; 1132 log_info("---> Name %s", local_name); 1133 hci_send_cmd(&hci_write_local_name, local_name); 1134 } 1135 break; 1136 case HCI_INIT_WRITE_EIR_DATA: 1137 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1138 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1139 break; 1140 case HCI_INIT_WRITE_INQUIRY_MODE: 1141 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1142 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1143 break; 1144 case HCI_INIT_WRITE_SCAN_ENABLE: 1145 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1146 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1147 break; 1148 // only sent if ENABLE_SCO_OVER_HCI is defined 1149 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1150 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1151 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1152 break; 1153 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1154 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1155 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1156 break; 1157 #endif 1158 #ifdef ENABLE_BLE 1159 // LE INIT 1160 case HCI_INIT_LE_READ_BUFFER_SIZE: 1161 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1162 hci_send_cmd(&hci_le_read_buffer_size); 1163 break; 1164 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1165 // LE Supported Host = 1, Simultaneous Host = 0 1166 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1167 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1168 break; 1169 case HCI_INIT_READ_WHITE_LIST_SIZE: 1170 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1171 hci_send_cmd(&hci_le_read_white_list_size); 1172 break; 1173 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1174 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1175 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1176 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1177 break; 1178 #endif 1179 default: 1180 return; 1181 } 1182 } 1183 1184 static void hci_init_done(void){ 1185 // done. tell the app 1186 log_info("hci_init_done -> HCI_STATE_WORKING"); 1187 hci_stack->state = HCI_STATE_WORKING; 1188 hci_emit_state(); 1189 hci_run(); 1190 } 1191 1192 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1193 UNUSED(size); 1194 1195 uint8_t command_completed = 0; 1196 1197 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1198 uint16_t opcode = little_endian_read_16(packet,3); 1199 if (opcode == hci_stack->last_cmd_opcode){ 1200 command_completed = 1; 1201 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1202 } else { 1203 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1204 } 1205 } 1206 1207 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1208 uint8_t status = packet[2]; 1209 uint16_t opcode = little_endian_read_16(packet,4); 1210 if (opcode == hci_stack->last_cmd_opcode){ 1211 if (status){ 1212 command_completed = 1; 1213 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1214 } else { 1215 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1216 } 1217 } else { 1218 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1219 } 1220 } 1221 1222 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1223 1224 // Vendor == CSR 1225 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1226 // TODO: track actual command 1227 command_completed = 1; 1228 } 1229 1230 // Vendor == Toshiba 1231 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1232 // TODO: track actual command 1233 command_completed = 1; 1234 } 1235 1236 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1237 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1238 // 1239 // HCI Reset 1240 // Timeout 100 ms 1241 // HCI Reset 1242 // Command Complete Reset 1243 // HCI Read Local Version Information 1244 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1245 // hang... 1246 // 1247 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1248 if (!command_completed 1249 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1250 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1251 1252 uint16_t opcode = little_endian_read_16(packet,3); 1253 if (opcode == hci_reset.opcode){ 1254 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1255 return; 1256 } 1257 } 1258 1259 // CSR & H5 1260 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1261 if (!command_completed 1262 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1263 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1264 1265 uint16_t opcode = little_endian_read_16(packet,3); 1266 if (opcode == hci_reset.opcode){ 1267 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1268 return; 1269 } 1270 } 1271 1272 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1273 // fix: Correct substate and behave as command below 1274 if (command_completed){ 1275 switch (hci_stack->substate){ 1276 case HCI_INIT_SEND_RESET: 1277 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1278 break; 1279 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1281 break; 1282 default: 1283 break; 1284 } 1285 } 1286 1287 #endif 1288 1289 if (!command_completed) return; 1290 1291 int need_baud_change = 0; 1292 int need_addr_change = 0; 1293 1294 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1295 need_baud_change = hci_stack->config 1296 && hci_stack->chipset 1297 && hci_stack->chipset->set_baudrate_command 1298 && hci_stack->hci_transport->set_baudrate 1299 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1300 1301 need_addr_change = hci_stack->custom_bd_addr_set 1302 && hci_stack->chipset 1303 && hci_stack->chipset->set_bd_addr_command; 1304 #endif 1305 1306 switch(hci_stack->substate){ 1307 1308 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1309 case HCI_INIT_SEND_RESET: 1310 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1311 // fix: just correct substate and behave as command below 1312 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1313 btstack_run_loop_remove_timer(&hci_stack->timeout); 1314 break; 1315 case HCI_INIT_W4_SEND_RESET: 1316 btstack_run_loop_remove_timer(&hci_stack->timeout); 1317 break; 1318 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1319 log_info("Received local name, need baud change %d", need_baud_change); 1320 if (need_baud_change){ 1321 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1322 return; 1323 } 1324 // skip baud change 1325 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1326 return; 1327 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1328 // for STLC2500D, baud rate change already happened. 1329 // for others, baud rate gets changed now 1330 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1331 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1332 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1336 return; 1337 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1338 btstack_run_loop_remove_timer(&hci_stack->timeout); 1339 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1340 return; 1341 case HCI_INIT_W4_CUSTOM_INIT: 1342 // repeat custom init 1343 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1344 return; 1345 #else 1346 case HCI_INIT_W4_SEND_RESET: 1347 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1348 return ; 1349 #endif 1350 1351 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1352 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1353 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1354 return; 1355 } 1356 if (need_addr_change){ 1357 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1358 return; 1359 } 1360 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1361 return; 1362 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1363 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1364 if (need_baud_change){ 1365 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1366 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1367 hci_stack->hci_transport->set_baudrate(baud_rate); 1368 } 1369 if (need_addr_change){ 1370 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1371 return; 1372 } 1373 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1374 return; 1375 case HCI_INIT_W4_SET_BD_ADDR: 1376 // for STLC2500D, bd addr change only gets active after sending reset command 1377 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1378 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1379 return; 1380 } 1381 // skipping st warm boot 1382 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1383 return; 1384 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1385 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1386 return; 1387 #endif 1388 case HCI_INIT_W4_READ_BD_ADDR: 1389 // only read buffer size if supported 1390 if (hci_stack->local_supported_commands[0] & 0x01) { 1391 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1392 return; 1393 } 1394 // skipping read buffer size 1395 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1396 return; 1397 case HCI_INIT_W4_SET_EVENT_MASK: 1398 // skip Classic init commands for LE only chipsets 1399 if (!hci_classic_supported()){ 1400 if (hci_le_supported()){ 1401 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1402 return; 1403 } else { 1404 log_error("Neither BR/EDR nor LE supported"); 1405 hci_init_done(); 1406 return; 1407 } 1408 } 1409 if (!gap_ssp_supported()){ 1410 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1411 return; 1412 } 1413 break; 1414 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1415 // skip write le host if not supported (e.g. on LE only EM9301) 1416 if (hci_stack->local_supported_commands[0] & 0x02) break; 1417 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1418 return; 1419 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1420 // skip write eir data if no eir data set 1421 if (hci_stack->eir_data) break; 1422 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1423 return; 1424 1425 #ifdef ENABLE_SCO_OVER_HCI 1426 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1427 // skip write synchronous flow control if not supported 1428 if (hci_stack->local_supported_commands[0] & 0x04) break; 1429 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1430 // explicit fall through to reduce repetitions 1431 1432 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1433 // skip write default erroneous data reporting if not supported 1434 if (hci_stack->local_supported_commands[0] & 0x08) break; 1435 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1436 // explicit fall through to reduce repetitions 1437 1438 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1439 if (!hci_le_supported()){ 1440 // SKIP LE init for Classic only configuration 1441 hci_init_done(); 1442 return; 1443 } 1444 break; 1445 #else 1446 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1447 if (!hci_le_supported()){ 1448 // SKIP LE init for Classic only configuration 1449 hci_init_done(); 1450 return; 1451 } 1452 #endif 1453 break; 1454 // Response to command before init done state -> init done 1455 case (HCI_INIT_DONE-1): 1456 hci_init_done(); 1457 return; 1458 1459 default: 1460 break; 1461 } 1462 hci_initializing_next_state(); 1463 } 1464 1465 static void event_handler(uint8_t *packet, int size){ 1466 1467 uint16_t event_length = packet[1]; 1468 1469 // assert packet is complete 1470 if (size != event_length + 2){ 1471 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1472 return; 1473 } 1474 1475 bd_addr_t addr; 1476 bd_addr_type_t addr_type; 1477 uint8_t link_type; 1478 hci_con_handle_t handle; 1479 hci_connection_t * conn; 1480 int i; 1481 1482 // warnings 1483 (void) link_type; 1484 1485 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1486 1487 switch (hci_event_packet_get_type(packet)) { 1488 1489 case HCI_EVENT_COMMAND_COMPLETE: 1490 // get num cmd packets - limit to 1 to reduce complexity 1491 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1492 1493 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1494 if (packet[5]) break; 1495 // terminate, name 248 chars 1496 packet[6+248] = 0; 1497 log_info("local name: %s", &packet[6]); 1498 } 1499 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1500 // from offset 5 1501 // status 1502 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1503 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1504 hci_stack->sco_data_packet_length = packet[8]; 1505 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1506 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1507 1508 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1509 // determine usable ACL payload size 1510 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1511 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1512 } 1513 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1514 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1515 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1516 } 1517 } 1518 #ifdef ENABLE_BLE 1519 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1520 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1521 hci_stack->le_acl_packets_total_num = packet[8]; 1522 // determine usable ACL payload size 1523 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1524 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1525 } 1526 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1527 } 1528 #ifdef ENABLE_LE_CENTRAL 1529 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1530 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1531 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1532 } 1533 #endif 1534 #endif 1535 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1536 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1537 hci_stack->local_bd_addr); 1538 log_info("Local Address, Status: 0x%02x: Addr: %s", 1539 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1540 #ifdef ENABLE_CLASSIC 1541 if (hci_stack->link_key_db){ 1542 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1543 } 1544 #endif 1545 } 1546 #ifdef ENABLE_CLASSIC 1547 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1548 hci_emit_discoverable_enabled(hci_stack->discoverable); 1549 } 1550 #endif 1551 1552 // Note: HCI init checks 1553 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1554 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1555 1556 #ifdef ENABLE_CLASSIC 1557 // determine usable ACL packet types based on host buffer size and supported features 1558 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1559 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1560 #endif 1561 // Classic/LE 1562 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1563 } 1564 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1565 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1566 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1567 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1568 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1569 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1570 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1571 } 1572 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1573 hci_stack->local_supported_commands[0] = 1574 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1575 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1576 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1577 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1578 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1579 } 1580 #ifdef ENABLE_CLASSIC 1581 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1582 if (packet[5] == 0){ 1583 hci_stack->synchronous_flow_control_enabled = 1; 1584 } 1585 } 1586 #endif 1587 break; 1588 1589 case HCI_EVENT_COMMAND_STATUS: 1590 // get num cmd packets - limit to 1 to reduce complexity 1591 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1592 break; 1593 1594 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1595 int offset = 3; 1596 for (i=0; i<packet[2];i++){ 1597 handle = little_endian_read_16(packet, offset); 1598 offset += 2; 1599 uint16_t num_packets = little_endian_read_16(packet, offset); 1600 offset += 2; 1601 1602 conn = hci_connection_for_handle(handle); 1603 if (!conn){ 1604 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1605 continue; 1606 } 1607 1608 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1609 #ifdef ENABLE_CLASSIC 1610 if (conn->num_sco_packets_sent >= num_packets){ 1611 conn->num_sco_packets_sent -= num_packets; 1612 } else { 1613 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1614 conn->num_sco_packets_sent = 0; 1615 } 1616 hci_notify_if_sco_can_send_now(); 1617 #endif 1618 } else { 1619 if (conn->num_acl_packets_sent >= num_packets){ 1620 conn->num_acl_packets_sent -= num_packets; 1621 } else { 1622 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1623 conn->num_acl_packets_sent = 0; 1624 } 1625 } 1626 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1627 } 1628 break; 1629 } 1630 1631 #ifdef ENABLE_CLASSIC 1632 case HCI_EVENT_CONNECTION_REQUEST: 1633 reverse_bd_addr(&packet[2], addr); 1634 // TODO: eval COD 8-10 1635 link_type = packet[11]; 1636 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1637 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1638 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1639 if (!conn) { 1640 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1641 } 1642 if (!conn) { 1643 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1644 hci_stack->decline_reason = 0x0d; 1645 bd_addr_copy(hci_stack->decline_addr, addr); 1646 break; 1647 } 1648 conn->role = HCI_ROLE_SLAVE; 1649 conn->state = RECEIVED_CONNECTION_REQUEST; 1650 // store info about eSCO 1651 if (link_type == 0x02){ 1652 conn->remote_supported_feature_eSCO = 1; 1653 } 1654 hci_run(); 1655 break; 1656 1657 case HCI_EVENT_CONNECTION_COMPLETE: 1658 // Connection management 1659 reverse_bd_addr(&packet[5], addr); 1660 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1661 addr_type = BD_ADDR_TYPE_CLASSIC; 1662 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1663 if (conn) { 1664 if (!packet[2]){ 1665 conn->state = OPEN; 1666 conn->con_handle = little_endian_read_16(packet, 3); 1667 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1668 1669 // restart timer 1670 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1671 btstack_run_loop_add_timer(&conn->timeout); 1672 1673 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1674 1675 hci_emit_nr_connections_changed(); 1676 } else { 1677 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1678 uint8_t status = packet[2]; 1679 bd_addr_t bd_address; 1680 memcpy(&bd_address, conn->address, 6); 1681 1682 // connection failed, remove entry 1683 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1684 btstack_memory_hci_connection_free( conn ); 1685 1686 // notify client if dedicated bonding 1687 if (notify_dedicated_bonding_failed){ 1688 log_info("hci notify_dedicated_bonding_failed"); 1689 hci_emit_dedicated_bonding_result(bd_address, status); 1690 } 1691 1692 // if authentication error, also delete link key 1693 if (packet[2] == 0x05) { 1694 gap_drop_link_key_for_bd_addr(addr); 1695 } 1696 } 1697 } 1698 break; 1699 1700 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1701 reverse_bd_addr(&packet[5], addr); 1702 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1703 if (packet[2]){ 1704 // connection failed 1705 break; 1706 } 1707 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1708 if (!conn) { 1709 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1710 } 1711 if (!conn) { 1712 break; 1713 } 1714 conn->state = OPEN; 1715 conn->con_handle = little_endian_read_16(packet, 3); 1716 break; 1717 1718 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1719 handle = little_endian_read_16(packet, 3); 1720 conn = hci_connection_for_handle(handle); 1721 if (!conn) break; 1722 if (!packet[2]){ 1723 uint8_t * features = &packet[5]; 1724 if (features[6] & (1 << 3)){ 1725 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1726 } 1727 if (features[3] & (1<<7)){ 1728 conn->remote_supported_feature_eSCO = 1; 1729 } 1730 } 1731 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1732 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1733 if (conn->bonding_flags & BONDING_DEDICATED){ 1734 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1735 } 1736 break; 1737 1738 case HCI_EVENT_LINK_KEY_REQUEST: 1739 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1740 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1741 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1742 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1743 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1744 hci_run(); 1745 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1746 return; 1747 1748 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1749 reverse_bd_addr(&packet[2], addr); 1750 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1751 if (!conn) break; 1752 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1753 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1754 // Change Connection Encryption keeps link key type 1755 if (link_key_type != CHANGED_COMBINATION_KEY){ 1756 conn->link_key_type = link_key_type; 1757 } 1758 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1759 // still forward event to allow dismiss of pairing dialog 1760 break; 1761 } 1762 1763 case HCI_EVENT_PIN_CODE_REQUEST: 1764 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1765 // non-bondable mode: pin code negative reply will be sent 1766 if (!hci_stack->bondable){ 1767 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1768 hci_run(); 1769 return; 1770 } 1771 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1772 if (!hci_stack->link_key_db) break; 1773 hci_event_pin_code_request_get_bd_addr(packet, addr); 1774 hci_stack->link_key_db->delete_link_key(addr); 1775 break; 1776 1777 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1778 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1779 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1780 break; 1781 1782 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1783 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1784 if (!hci_stack->ssp_auto_accept) break; 1785 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1786 break; 1787 1788 case HCI_EVENT_USER_PASSKEY_REQUEST: 1789 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1790 if (!hci_stack->ssp_auto_accept) break; 1791 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1792 break; 1793 #endif 1794 1795 case HCI_EVENT_ENCRYPTION_CHANGE: 1796 handle = little_endian_read_16(packet, 3); 1797 conn = hci_connection_for_handle(handle); 1798 if (!conn) break; 1799 if (packet[2] == 0) { 1800 if (packet[5]){ 1801 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1802 } else { 1803 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1804 } 1805 } 1806 #ifdef ENABLE_CLASSIC 1807 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1808 #endif 1809 break; 1810 1811 #ifdef ENABLE_CLASSIC 1812 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1813 handle = little_endian_read_16(packet, 3); 1814 conn = hci_connection_for_handle(handle); 1815 if (!conn) break; 1816 1817 // dedicated bonding: send result and disconnect 1818 if (conn->bonding_flags & BONDING_DEDICATED){ 1819 conn->bonding_flags &= ~BONDING_DEDICATED; 1820 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1821 conn->bonding_status = packet[2]; 1822 break; 1823 } 1824 1825 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1826 // link key sufficient for requested security 1827 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1828 break; 1829 } 1830 // not enough 1831 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1832 break; 1833 #endif 1834 1835 // HCI_EVENT_DISCONNECTION_COMPLETE 1836 // has been split, to first notify stack before shutting connection down 1837 // see end of function, too. 1838 case HCI_EVENT_DISCONNECTION_COMPLETE: 1839 if (packet[2]) break; // status != 0 1840 handle = little_endian_read_16(packet, 3); 1841 // drop outgoing ACL fragments if it is for closed connection 1842 if (hci_stack->acl_fragmentation_total_size > 0) { 1843 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1844 log_info("hci: drop fragmented ACL data for closed connection"); 1845 hci_stack->acl_fragmentation_total_size = 0; 1846 hci_stack->acl_fragmentation_pos = 0; 1847 } 1848 } 1849 1850 // re-enable advertisements for le connections if active 1851 conn = hci_connection_for_handle(handle); 1852 if (!conn) break; 1853 #ifdef ENABLE_BLE 1854 #ifdef ENABLE_LE_PERIPHERAL 1855 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1856 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1857 } 1858 #endif 1859 #endif 1860 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1861 break; 1862 1863 case HCI_EVENT_HARDWARE_ERROR: 1864 log_error("Hardware Error: 0x%02x", packet[2]); 1865 if (hci_stack->hardware_error_callback){ 1866 (*hci_stack->hardware_error_callback)(packet[2]); 1867 } else { 1868 // if no special requests, just reboot stack 1869 hci_power_control_off(); 1870 hci_power_control_on(); 1871 } 1872 break; 1873 1874 #ifdef ENABLE_CLASSIC 1875 case HCI_EVENT_ROLE_CHANGE: 1876 if (packet[2]) break; // status != 0 1877 handle = little_endian_read_16(packet, 3); 1878 conn = hci_connection_for_handle(handle); 1879 if (!conn) break; // no conn 1880 conn->role = packet[9]; 1881 break; 1882 #endif 1883 1884 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1885 // release packet buffer only for asynchronous transport and if there are not further fragements 1886 if (hci_transport_synchronous()) { 1887 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1888 return; // instead of break: to avoid re-entering hci_run() 1889 } 1890 if (hci_stack->acl_fragmentation_total_size) break; 1891 hci_release_packet_buffer(); 1892 1893 // L2CAP receives this event via the hci_emit_event below 1894 1895 #ifdef ENABLE_CLASSIC 1896 // For SCO, we do the can_send_now_check here 1897 hci_notify_if_sco_can_send_now(); 1898 #endif 1899 break; 1900 1901 #ifdef ENABLE_CLASSIC 1902 case HCI_EVENT_SCO_CAN_SEND_NOW: 1903 // For SCO, we do the can_send_now_check here 1904 hci_notify_if_sco_can_send_now(); 1905 return; 1906 #endif 1907 1908 #ifdef ENABLE_BLE 1909 case HCI_EVENT_LE_META: 1910 switch (packet[2]){ 1911 #ifdef ENABLE_LE_CENTRAL 1912 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1913 // log_info("advertising report received"); 1914 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1915 le_handle_advertisement_report(packet, size); 1916 break; 1917 #endif 1918 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1919 // Connection management 1920 reverse_bd_addr(&packet[8], addr); 1921 addr_type = (bd_addr_type_t)packet[7]; 1922 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1923 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1924 #ifdef ENABLE_LE_CENTRAL 1925 // if auto-connect, remove from whitelist in both roles 1926 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1927 hci_remove_from_whitelist(addr_type, addr); 1928 } 1929 // handle error: error is reported only to the initiator -> outgoing connection 1930 if (packet[3]){ 1931 // outgoing connection establishment is done 1932 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1933 // remove entry 1934 if (conn){ 1935 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1936 btstack_memory_hci_connection_free( conn ); 1937 } 1938 break; 1939 } 1940 #endif 1941 // on success, both hosts receive connection complete event 1942 if (packet[6] == HCI_ROLE_MASTER){ 1943 #ifdef ENABLE_LE_CENTRAL 1944 // if we're master, it was an outgoing connection and we're done with it 1945 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1946 #endif 1947 } else { 1948 #ifdef ENABLE_LE_PERIPHERAL 1949 // if we're slave, it was an incoming connection, advertisements have stopped 1950 hci_stack->le_advertisements_active = 0; 1951 // try to re-enable them 1952 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1953 #endif 1954 } 1955 // LE connections are auto-accepted, so just create a connection if there isn't one already 1956 if (!conn){ 1957 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1958 } 1959 // no memory, sorry. 1960 if (!conn){ 1961 break; 1962 } 1963 1964 conn->state = OPEN; 1965 conn->role = packet[6]; 1966 conn->con_handle = little_endian_read_16(packet, 4); 1967 1968 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1969 1970 // restart timer 1971 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1972 // btstack_run_loop_add_timer(&conn->timeout); 1973 1974 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1975 1976 hci_emit_nr_connections_changed(); 1977 break; 1978 1979 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1980 1981 default: 1982 break; 1983 } 1984 break; 1985 #endif 1986 default: 1987 break; 1988 } 1989 1990 // handle BT initialization 1991 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1992 hci_initializing_event_handler(packet, size); 1993 } 1994 1995 // help with BT sleep 1996 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1997 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1998 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1999 hci_initializing_next_state(); 2000 } 2001 2002 // notify upper stack 2003 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2004 2005 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2006 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2007 if (!packet[2]){ 2008 handle = little_endian_read_16(packet, 3); 2009 hci_connection_t * aConn = hci_connection_for_handle(handle); 2010 if (aConn) { 2011 uint8_t status = aConn->bonding_status; 2012 uint16_t flags = aConn->bonding_flags; 2013 bd_addr_t bd_address; 2014 memcpy(&bd_address, aConn->address, 6); 2015 hci_shutdown_connection(aConn); 2016 // connection struct is gone, don't access anymore 2017 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2018 hci_emit_dedicated_bonding_result(bd_address, status); 2019 } 2020 } 2021 } 2022 } 2023 2024 // execute main loop 2025 hci_run(); 2026 } 2027 2028 #ifdef ENABLE_CLASSIC 2029 static void sco_handler(uint8_t * packet, uint16_t size){ 2030 if (!hci_stack->sco_packet_handler) return; 2031 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2032 } 2033 #endif 2034 2035 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2036 hci_dump_packet(packet_type, 1, packet, size); 2037 switch (packet_type) { 2038 case HCI_EVENT_PACKET: 2039 event_handler(packet, size); 2040 break; 2041 case HCI_ACL_DATA_PACKET: 2042 acl_handler(packet, size); 2043 break; 2044 #ifdef ENABLE_CLASSIC 2045 case HCI_SCO_DATA_PACKET: 2046 sco_handler(packet, size); 2047 break; 2048 #endif 2049 default: 2050 break; 2051 } 2052 } 2053 2054 /** 2055 * @brief Add event packet handler. 2056 */ 2057 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2058 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2059 } 2060 2061 2062 /** Register HCI packet handlers */ 2063 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2064 hci_stack->acl_packet_handler = handler; 2065 } 2066 2067 #ifdef ENABLE_CLASSIC 2068 /** 2069 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2070 */ 2071 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2072 hci_stack->sco_packet_handler = handler; 2073 } 2074 #endif 2075 2076 static void hci_state_reset(void){ 2077 // no connections yet 2078 hci_stack->connections = NULL; 2079 2080 // keep discoverable/connectable as this has been requested by the client(s) 2081 // hci_stack->discoverable = 0; 2082 // hci_stack->connectable = 0; 2083 // hci_stack->bondable = 1; 2084 2085 // buffer is free 2086 hci_stack->hci_packet_buffer_reserved = 0; 2087 2088 // no pending cmds 2089 hci_stack->decline_reason = 0; 2090 hci_stack->new_scan_enable_value = 0xff; 2091 2092 // LE 2093 #ifdef ENABLE_LE_PERIPHERAL 2094 hci_stack->adv_addr_type = 0; 2095 hci_stack->le_advertisements_random_address_set = 0; 2096 memset(hci_stack->adv_address, 0, 6); 2097 #endif 2098 #ifdef ENABLE_LE_CENTRAL 2099 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2100 hci_stack->le_scan_type = 0xff; 2101 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2102 hci_stack->le_whitelist = 0; 2103 hci_stack->le_whitelist_capacity = 0; 2104 #endif 2105 2106 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2107 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2108 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2109 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2110 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2111 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2112 } 2113 2114 #ifdef ENABLE_CLASSIC 2115 /** 2116 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2117 */ 2118 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2119 // store and open remote device db 2120 hci_stack->link_key_db = link_key_db; 2121 if (hci_stack->link_key_db) { 2122 hci_stack->link_key_db->open(); 2123 } 2124 } 2125 #endif 2126 2127 void hci_init(const hci_transport_t *transport, const void *config){ 2128 2129 #ifdef HAVE_MALLOC 2130 if (!hci_stack) { 2131 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2132 } 2133 #else 2134 hci_stack = &hci_stack_static; 2135 #endif 2136 memset(hci_stack, 0, sizeof(hci_stack_t)); 2137 2138 // reference to use transport layer implementation 2139 hci_stack->hci_transport = transport; 2140 2141 // reference to used config 2142 hci_stack->config = config; 2143 2144 // setup pointer for outgoing packet buffer 2145 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2146 2147 // max acl payload size defined in config.h 2148 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2149 2150 // register packet handlers with transport 2151 transport->register_packet_handler(&packet_handler); 2152 2153 hci_stack->state = HCI_STATE_OFF; 2154 2155 // class of device 2156 hci_stack->class_of_device = 0x007a020c; // Smartphone 2157 2158 // bondable by default 2159 hci_stack->bondable = 1; 2160 2161 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2162 hci_stack->ssp_enable = 1; 2163 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2164 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2165 hci_stack->ssp_auto_accept = 1; 2166 2167 // voice setting - signed 8 bit pcm data with CVSD over the air 2168 hci_stack->sco_voice_setting = 0x40; 2169 2170 hci_state_reset(); 2171 } 2172 2173 /** 2174 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2175 */ 2176 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2177 hci_stack->chipset = chipset_driver; 2178 2179 // reset chipset driver - init is also called on power_up 2180 if (hci_stack->chipset && hci_stack->chipset->init){ 2181 hci_stack->chipset->init(hci_stack->config); 2182 } 2183 } 2184 2185 /** 2186 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2187 */ 2188 void hci_set_control(const btstack_control_t *hardware_control){ 2189 // references to used control implementation 2190 hci_stack->control = hardware_control; 2191 // init with transport config 2192 hardware_control->init(hci_stack->config); 2193 } 2194 2195 void hci_close(void){ 2196 // close remote device db 2197 if (hci_stack->link_key_db) { 2198 hci_stack->link_key_db->close(); 2199 } 2200 2201 btstack_linked_list_iterator_t lit; 2202 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2203 while (btstack_linked_list_iterator_has_next(&lit)){ 2204 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2205 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2206 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2207 hci_shutdown_connection(connection); 2208 } 2209 2210 hci_power_control(HCI_POWER_OFF); 2211 2212 #ifdef HAVE_MALLOC 2213 free(hci_stack); 2214 #endif 2215 hci_stack = NULL; 2216 } 2217 2218 #ifdef ENABLE_CLASSIC 2219 void gap_set_class_of_device(uint32_t class_of_device){ 2220 hci_stack->class_of_device = class_of_device; 2221 } 2222 2223 void hci_disable_l2cap_timeout_check(void){ 2224 disable_l2cap_timeouts = 1; 2225 } 2226 #endif 2227 2228 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2229 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2230 void hci_set_bd_addr(bd_addr_t addr){ 2231 memcpy(hci_stack->custom_bd_addr, addr, 6); 2232 hci_stack->custom_bd_addr_set = 1; 2233 } 2234 #endif 2235 2236 // State-Module-Driver overview 2237 // state module low-level 2238 // HCI_STATE_OFF off close 2239 // HCI_STATE_INITIALIZING, on open 2240 // HCI_STATE_WORKING, on open 2241 // HCI_STATE_HALTING, on open 2242 // HCI_STATE_SLEEPING, off/sleep close 2243 // HCI_STATE_FALLING_ASLEEP on open 2244 2245 static int hci_power_control_on(void){ 2246 2247 // power on 2248 int err = 0; 2249 if (hci_stack->control && hci_stack->control->on){ 2250 err = (*hci_stack->control->on)(); 2251 } 2252 if (err){ 2253 log_error( "POWER_ON failed"); 2254 hci_emit_hci_open_failed(); 2255 return err; 2256 } 2257 2258 // int chipset driver 2259 if (hci_stack->chipset && hci_stack->chipset->init){ 2260 hci_stack->chipset->init(hci_stack->config); 2261 } 2262 2263 // init transport 2264 if (hci_stack->hci_transport->init){ 2265 hci_stack->hci_transport->init(hci_stack->config); 2266 } 2267 2268 // open transport 2269 err = hci_stack->hci_transport->open(); 2270 if (err){ 2271 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2272 if (hci_stack->control && hci_stack->control->off){ 2273 (*hci_stack->control->off)(); 2274 } 2275 hci_emit_hci_open_failed(); 2276 return err; 2277 } 2278 return 0; 2279 } 2280 2281 static void hci_power_control_off(void){ 2282 2283 log_info("hci_power_control_off"); 2284 2285 // close low-level device 2286 hci_stack->hci_transport->close(); 2287 2288 log_info("hci_power_control_off - hci_transport closed"); 2289 2290 // power off 2291 if (hci_stack->control && hci_stack->control->off){ 2292 (*hci_stack->control->off)(); 2293 } 2294 2295 log_info("hci_power_control_off - control closed"); 2296 2297 hci_stack->state = HCI_STATE_OFF; 2298 } 2299 2300 static void hci_power_control_sleep(void){ 2301 2302 log_info("hci_power_control_sleep"); 2303 2304 #if 0 2305 // don't close serial port during sleep 2306 2307 // close low-level device 2308 hci_stack->hci_transport->close(hci_stack->config); 2309 #endif 2310 2311 // sleep mode 2312 if (hci_stack->control && hci_stack->control->sleep){ 2313 (*hci_stack->control->sleep)(); 2314 } 2315 2316 hci_stack->state = HCI_STATE_SLEEPING; 2317 } 2318 2319 static int hci_power_control_wake(void){ 2320 2321 log_info("hci_power_control_wake"); 2322 2323 // wake on 2324 if (hci_stack->control && hci_stack->control->wake){ 2325 (*hci_stack->control->wake)(); 2326 } 2327 2328 #if 0 2329 // open low-level device 2330 int err = hci_stack->hci_transport->open(hci_stack->config); 2331 if (err){ 2332 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2333 if (hci_stack->control && hci_stack->control->off){ 2334 (*hci_stack->control->off)(); 2335 } 2336 hci_emit_hci_open_failed(); 2337 return err; 2338 } 2339 #endif 2340 2341 return 0; 2342 } 2343 2344 static void hci_power_transition_to_initializing(void){ 2345 // set up state machine 2346 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2347 hci_stack->hci_packet_buffer_reserved = 0; 2348 hci_stack->state = HCI_STATE_INITIALIZING; 2349 hci_stack->substate = HCI_INIT_SEND_RESET; 2350 } 2351 2352 int hci_power_control(HCI_POWER_MODE power_mode){ 2353 2354 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2355 2356 int err = 0; 2357 switch (hci_stack->state){ 2358 2359 case HCI_STATE_OFF: 2360 switch (power_mode){ 2361 case HCI_POWER_ON: 2362 err = hci_power_control_on(); 2363 if (err) { 2364 log_error("hci_power_control_on() error %d", err); 2365 return err; 2366 } 2367 hci_power_transition_to_initializing(); 2368 break; 2369 case HCI_POWER_OFF: 2370 // do nothing 2371 break; 2372 case HCI_POWER_SLEEP: 2373 // do nothing (with SLEEP == OFF) 2374 break; 2375 } 2376 break; 2377 2378 case HCI_STATE_INITIALIZING: 2379 switch (power_mode){ 2380 case HCI_POWER_ON: 2381 // do nothing 2382 break; 2383 case HCI_POWER_OFF: 2384 // no connections yet, just turn it off 2385 hci_power_control_off(); 2386 break; 2387 case HCI_POWER_SLEEP: 2388 // no connections yet, just turn it off 2389 hci_power_control_sleep(); 2390 break; 2391 } 2392 break; 2393 2394 case HCI_STATE_WORKING: 2395 switch (power_mode){ 2396 case HCI_POWER_ON: 2397 // do nothing 2398 break; 2399 case HCI_POWER_OFF: 2400 // see hci_run 2401 hci_stack->state = HCI_STATE_HALTING; 2402 break; 2403 case HCI_POWER_SLEEP: 2404 // see hci_run 2405 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2406 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2407 break; 2408 } 2409 break; 2410 2411 case HCI_STATE_HALTING: 2412 switch (power_mode){ 2413 case HCI_POWER_ON: 2414 hci_power_transition_to_initializing(); 2415 break; 2416 case HCI_POWER_OFF: 2417 // do nothing 2418 break; 2419 case HCI_POWER_SLEEP: 2420 // see hci_run 2421 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2422 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2423 break; 2424 } 2425 break; 2426 2427 case HCI_STATE_FALLING_ASLEEP: 2428 switch (power_mode){ 2429 case HCI_POWER_ON: 2430 2431 #ifdef HAVE_PLATFORM_IPHONE_OS 2432 // nothing to do, if H4 supports power management 2433 if (btstack_control_iphone_power_management_enabled()){ 2434 hci_stack->state = HCI_STATE_INITIALIZING; 2435 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2436 break; 2437 } 2438 #endif 2439 hci_power_transition_to_initializing(); 2440 break; 2441 case HCI_POWER_OFF: 2442 // see hci_run 2443 hci_stack->state = HCI_STATE_HALTING; 2444 break; 2445 case HCI_POWER_SLEEP: 2446 // do nothing 2447 break; 2448 } 2449 break; 2450 2451 case HCI_STATE_SLEEPING: 2452 switch (power_mode){ 2453 case HCI_POWER_ON: 2454 2455 #ifdef HAVE_PLATFORM_IPHONE_OS 2456 // nothing to do, if H4 supports power management 2457 if (btstack_control_iphone_power_management_enabled()){ 2458 hci_stack->state = HCI_STATE_INITIALIZING; 2459 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2460 hci_update_scan_enable(); 2461 break; 2462 } 2463 #endif 2464 err = hci_power_control_wake(); 2465 if (err) return err; 2466 hci_power_transition_to_initializing(); 2467 break; 2468 case HCI_POWER_OFF: 2469 hci_stack->state = HCI_STATE_HALTING; 2470 break; 2471 case HCI_POWER_SLEEP: 2472 // do nothing 2473 break; 2474 } 2475 break; 2476 } 2477 2478 // create internal event 2479 hci_emit_state(); 2480 2481 // trigger next/first action 2482 hci_run(); 2483 2484 return 0; 2485 } 2486 2487 2488 #ifdef ENABLE_CLASSIC 2489 2490 static void hci_update_scan_enable(void){ 2491 // 2 = page scan, 1 = inq scan 2492 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2493 hci_run(); 2494 } 2495 2496 void gap_discoverable_control(uint8_t enable){ 2497 if (enable) enable = 1; // normalize argument 2498 2499 if (hci_stack->discoverable == enable){ 2500 hci_emit_discoverable_enabled(hci_stack->discoverable); 2501 return; 2502 } 2503 2504 hci_stack->discoverable = enable; 2505 hci_update_scan_enable(); 2506 } 2507 2508 void gap_connectable_control(uint8_t enable){ 2509 if (enable) enable = 1; // normalize argument 2510 2511 // don't emit event 2512 if (hci_stack->connectable == enable) return; 2513 2514 hci_stack->connectable = enable; 2515 hci_update_scan_enable(); 2516 } 2517 #endif 2518 2519 void gap_local_bd_addr(bd_addr_t address_buffer){ 2520 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2521 } 2522 2523 static void hci_run(void){ 2524 2525 // log_info("hci_run: entered"); 2526 btstack_linked_item_t * it; 2527 2528 // send continuation fragments first, as they block the prepared packet buffer 2529 if (hci_stack->acl_fragmentation_total_size > 0) { 2530 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2531 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2532 if (connection) { 2533 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2534 hci_send_acl_packet_fragments(connection); 2535 return; 2536 } 2537 } else { 2538 // connection gone -> discard further fragments 2539 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2540 hci_stack->acl_fragmentation_total_size = 0; 2541 hci_stack->acl_fragmentation_pos = 0; 2542 } 2543 } 2544 2545 if (!hci_can_send_command_packet_now()) return; 2546 2547 // global/non-connection oriented commands 2548 2549 #ifdef ENABLE_CLASSIC 2550 // decline incoming connections 2551 if (hci_stack->decline_reason){ 2552 uint8_t reason = hci_stack->decline_reason; 2553 hci_stack->decline_reason = 0; 2554 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2555 return; 2556 } 2557 2558 // send scan enable 2559 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2560 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2561 hci_stack->new_scan_enable_value = 0xff; 2562 return; 2563 } 2564 #endif 2565 2566 #ifdef ENABLE_BLE 2567 if (hci_stack->state == HCI_STATE_WORKING){ 2568 2569 #ifdef ENABLE_LE_CENTRAL 2570 // handle le scan 2571 switch(hci_stack->le_scanning_state){ 2572 case LE_START_SCAN: 2573 hci_stack->le_scanning_state = LE_SCANNING; 2574 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2575 return; 2576 2577 case LE_STOP_SCAN: 2578 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2579 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2580 return; 2581 default: 2582 break; 2583 } 2584 if (hci_stack->le_scan_type != 0xff){ 2585 // defaults: active scanning, accept all advertisement packets 2586 int scan_type = hci_stack->le_scan_type; 2587 hci_stack->le_scan_type = 0xff; 2588 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); 2589 return; 2590 } 2591 #endif 2592 #ifdef ENABLE_LE_PERIPHERAL 2593 // le advertisement control 2594 if (hci_stack->le_advertisements_todo){ 2595 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2596 } 2597 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2598 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2599 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2600 return; 2601 } 2602 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2603 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2604 hci_send_cmd(&hci_le_set_advertising_parameters, 2605 hci_stack->le_advertisements_interval_min, 2606 hci_stack->le_advertisements_interval_max, 2607 hci_stack->le_advertisements_type, 2608 hci_stack->le_advertisements_own_address_type, 2609 hci_stack->le_advertisements_direct_address_type, 2610 hci_stack->le_advertisements_direct_address, 2611 hci_stack->le_advertisements_channel_map, 2612 hci_stack->le_advertisements_filter_policy); 2613 return; 2614 } 2615 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2616 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2617 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2618 hci_stack->le_advertisements_data); 2619 return; 2620 } 2621 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2622 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2623 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2624 hci_stack->le_scan_response_data); 2625 return; 2626 } 2627 // Random address needs to be set before enabling advertisements 2628 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE) 2629 && (hci_stack->le_advertisements_own_address_type == 0 || hci_stack->le_advertisements_random_address_set)){ 2630 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2631 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2632 return; 2633 } 2634 #endif 2635 2636 #ifdef ENABLE_LE_CENTRAL 2637 // 2638 // LE Whitelist Management 2639 // 2640 2641 // check if whitelist needs modification 2642 btstack_linked_list_iterator_t lit; 2643 int modification_pending = 0; 2644 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2645 while (btstack_linked_list_iterator_has_next(&lit)){ 2646 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2647 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2648 modification_pending = 1; 2649 break; 2650 } 2651 } 2652 2653 if (modification_pending){ 2654 // stop connnecting if modification pending 2655 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2656 hci_send_cmd(&hci_le_create_connection_cancel); 2657 return; 2658 } 2659 2660 // add/remove entries 2661 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2662 while (btstack_linked_list_iterator_has_next(&lit)){ 2663 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2664 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2665 entry->state = LE_WHITELIST_ON_CONTROLLER; 2666 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2667 return; 2668 2669 } 2670 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2671 bd_addr_t address; 2672 bd_addr_type_t address_type = entry->address_type; 2673 memcpy(address, entry->address, 6); 2674 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2675 btstack_memory_whitelist_entry_free(entry); 2676 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2677 return; 2678 } 2679 } 2680 } 2681 2682 // start connecting 2683 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2684 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2685 bd_addr_t null_addr; 2686 memset(null_addr, 0, 6); 2687 hci_send_cmd(&hci_le_create_connection, 2688 0x0060, // scan interval: 60 ms 2689 0x0030, // scan interval: 30 ms 2690 1, // use whitelist 2691 0, // peer address type 2692 null_addr, // peer bd addr 2693 hci_stack->adv_addr_type, // our addr type: 2694 0x0008, // conn interval min 2695 0x0018, // conn interval max 2696 0, // conn latency 2697 0x0048, // supervision timeout 2698 0x0001, // min ce length 2699 0x0001 // max ce length 2700 ); 2701 return; 2702 } 2703 #endif 2704 } 2705 #endif 2706 2707 // send pending HCI commands 2708 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2709 hci_connection_t * connection = (hci_connection_t *) it; 2710 2711 switch(connection->state){ 2712 case SEND_CREATE_CONNECTION: 2713 switch(connection->address_type){ 2714 #ifdef ENABLE_CLASSIC 2715 case BD_ADDR_TYPE_CLASSIC: 2716 log_info("sending hci_create_connection"); 2717 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2718 break; 2719 #endif 2720 default: 2721 #ifdef ENABLE_BLE 2722 #ifdef ENABLE_LE_CENTRAL 2723 log_info("sending hci_le_create_connection"); 2724 hci_send_cmd(&hci_le_create_connection, 2725 0x0060, // scan interval: 60 ms 2726 0x0030, // scan interval: 30 ms 2727 0, // don't use whitelist 2728 connection->address_type, // peer address type 2729 connection->address, // peer bd addr 2730 hci_stack->adv_addr_type, // our addr type: 2731 0x0008, // conn interval min 2732 0x0018, // conn interval max 2733 0, // conn latency 2734 0x0048, // supervision timeout 2735 0x0001, // min ce length 2736 0x0001 // max ce length 2737 ); 2738 2739 connection->state = SENT_CREATE_CONNECTION; 2740 #endif 2741 #endif 2742 break; 2743 } 2744 return; 2745 2746 #ifdef ENABLE_CLASSIC 2747 case RECEIVED_CONNECTION_REQUEST: 2748 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2749 connection->state = ACCEPTED_CONNECTION_REQUEST; 2750 connection->role = HCI_ROLE_SLAVE; 2751 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2752 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2753 } 2754 return; 2755 #endif 2756 2757 #ifdef ENABLE_BLE 2758 #ifdef ENABLE_LE_CENTRAL 2759 case SEND_CANCEL_CONNECTION: 2760 connection->state = SENT_CANCEL_CONNECTION; 2761 hci_send_cmd(&hci_le_create_connection_cancel); 2762 return; 2763 #endif 2764 #endif 2765 case SEND_DISCONNECT: 2766 connection->state = SENT_DISCONNECT; 2767 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2768 return; 2769 2770 default: 2771 break; 2772 } 2773 2774 #ifdef ENABLE_CLASSIC 2775 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2776 log_info("responding to link key request"); 2777 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2778 link_key_t link_key; 2779 link_key_type_t link_key_type; 2780 if ( hci_stack->link_key_db 2781 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2782 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2783 connection->link_key_type = link_key_type; 2784 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2785 } else { 2786 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2787 } 2788 return; 2789 } 2790 2791 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2792 log_info("denying to pin request"); 2793 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2794 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2795 return; 2796 } 2797 2798 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2799 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2800 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2801 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2802 // tweak authentication requirements 2803 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2804 if (connection->bonding_flags & BONDING_DEDICATED){ 2805 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2806 } 2807 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2808 authreq |= 1; 2809 } 2810 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2811 } else { 2812 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2813 } 2814 return; 2815 } 2816 2817 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2818 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2819 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2820 return; 2821 } 2822 2823 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2824 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2825 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2826 return; 2827 } 2828 2829 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2830 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2831 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2832 return; 2833 } 2834 2835 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2836 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2837 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2838 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2839 return; 2840 } 2841 2842 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2843 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2844 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2845 return; 2846 } 2847 2848 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2849 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2850 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2851 return; 2852 } 2853 #endif 2854 2855 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2856 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2857 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2858 return; 2859 } 2860 2861 #ifdef ENABLE_BLE 2862 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2863 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2864 2865 uint16_t connection_interval_min = connection->le_conn_interval_min; 2866 connection->le_conn_interval_min = 0; 2867 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2868 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2869 0x0000, 0xffff); 2870 } 2871 #endif 2872 } 2873 2874 hci_connection_t * connection; 2875 switch (hci_stack->state){ 2876 case HCI_STATE_INITIALIZING: 2877 hci_initializing_run(); 2878 break; 2879 2880 case HCI_STATE_HALTING: 2881 2882 log_info("HCI_STATE_HALTING"); 2883 2884 // free whitelist entries 2885 #ifdef ENABLE_BLE 2886 #ifdef ENABLE_LE_CENTRAL 2887 { 2888 btstack_linked_list_iterator_t lit; 2889 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2890 while (btstack_linked_list_iterator_has_next(&lit)){ 2891 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2892 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2893 btstack_memory_whitelist_entry_free(entry); 2894 } 2895 } 2896 #endif 2897 #endif 2898 // close all open connections 2899 connection = (hci_connection_t *) hci_stack->connections; 2900 if (connection){ 2901 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2902 if (!hci_can_send_command_packet_now()) return; 2903 2904 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2905 2906 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2907 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2908 2909 // ... which would be ignored anyway as we shutdown (free) the connection now 2910 hci_shutdown_connection(connection); 2911 2912 // finally, send the disconnect command 2913 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2914 return; 2915 } 2916 log_info("HCI_STATE_HALTING, calling off"); 2917 2918 // switch mode 2919 hci_power_control_off(); 2920 2921 log_info("HCI_STATE_HALTING, emitting state"); 2922 hci_emit_state(); 2923 log_info("HCI_STATE_HALTING, done"); 2924 break; 2925 2926 case HCI_STATE_FALLING_ASLEEP: 2927 switch(hci_stack->substate) { 2928 case HCI_FALLING_ASLEEP_DISCONNECT: 2929 log_info("HCI_STATE_FALLING_ASLEEP"); 2930 // close all open connections 2931 connection = (hci_connection_t *) hci_stack->connections; 2932 2933 #ifdef HAVE_PLATFORM_IPHONE_OS 2934 // don't close connections, if H4 supports power management 2935 if (btstack_control_iphone_power_management_enabled()){ 2936 connection = NULL; 2937 } 2938 #endif 2939 if (connection){ 2940 2941 // send disconnect 2942 if (!hci_can_send_command_packet_now()) return; 2943 2944 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2945 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2946 2947 // send disconnected event right away - causes higher layer connections to get closed, too. 2948 hci_shutdown_connection(connection); 2949 return; 2950 } 2951 2952 if (hci_classic_supported()){ 2953 // disable page and inquiry scan 2954 if (!hci_can_send_command_packet_now()) return; 2955 2956 log_info("HCI_STATE_HALTING, disabling inq scans"); 2957 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2958 2959 // continue in next sub state 2960 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2961 break; 2962 } 2963 // no break - fall through for ble-only chips 2964 2965 case HCI_FALLING_ASLEEP_COMPLETE: 2966 log_info("HCI_STATE_HALTING, calling sleep"); 2967 #ifdef HAVE_PLATFORM_IPHONE_OS 2968 // don't actually go to sleep, if H4 supports power management 2969 if (btstack_control_iphone_power_management_enabled()){ 2970 // SLEEP MODE reached 2971 hci_stack->state = HCI_STATE_SLEEPING; 2972 hci_emit_state(); 2973 break; 2974 } 2975 #endif 2976 // switch mode 2977 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2978 hci_emit_state(); 2979 break; 2980 2981 default: 2982 break; 2983 } 2984 break; 2985 2986 default: 2987 break; 2988 } 2989 } 2990 2991 int hci_send_cmd_packet(uint8_t *packet, int size){ 2992 // house-keeping 2993 2994 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2995 hci_stack->loopback_mode = packet[3]; 2996 } 2997 2998 #ifdef ENABLE_CLASSIC 2999 bd_addr_t addr; 3000 hci_connection_t * conn; 3001 3002 // create_connection? 3003 if (IS_COMMAND(packet, hci_create_connection)){ 3004 reverse_bd_addr(&packet[3], addr); 3005 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3006 3007 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3008 if (!conn){ 3009 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3010 if (!conn){ 3011 // notify client that alloc failed 3012 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3013 return 0; // don't sent packet to controller 3014 } 3015 conn->state = SEND_CREATE_CONNECTION; 3016 } 3017 log_info("conn state %u", conn->state); 3018 switch (conn->state){ 3019 // if connection active exists 3020 case OPEN: 3021 // and OPEN, emit connection complete command, don't send to controller 3022 hci_emit_connection_complete(addr, conn->con_handle, 0); 3023 return 0; 3024 case SEND_CREATE_CONNECTION: 3025 // connection created by hci, e.g. dedicated bonding 3026 break; 3027 default: 3028 // otherwise, just ignore as it is already in the open process 3029 return 0; 3030 } 3031 conn->state = SENT_CREATE_CONNECTION; 3032 } 3033 3034 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3035 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3036 } 3037 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3038 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3039 } 3040 3041 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3042 if (hci_stack->link_key_db){ 3043 reverse_bd_addr(&packet[3], addr); 3044 hci_stack->link_key_db->delete_link_key(addr); 3045 } 3046 } 3047 3048 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3049 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3050 reverse_bd_addr(&packet[3], addr); 3051 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3052 if (conn){ 3053 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3054 } 3055 } 3056 3057 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3058 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3059 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3060 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3061 reverse_bd_addr(&packet[3], addr); 3062 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3063 if (conn){ 3064 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3065 } 3066 } 3067 #endif 3068 3069 #ifdef ENABLE_BLE 3070 #ifdef ENABLE_LE_PERIPHERAL 3071 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3072 hci_stack->le_advertisements_random_address_set = 1; 3073 reverse_bd_addr(&packet[3], hci_stack->adv_address); 3074 } 3075 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 3076 hci_stack->adv_addr_type = packet[8]; 3077 } 3078 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3079 hci_stack->le_advertisements_active = packet[3]; 3080 } 3081 #endif 3082 #ifdef ENABLE_LE_CENTRAL 3083 if (IS_COMMAND(packet, hci_le_create_connection)){ 3084 // white list used? 3085 uint8_t initiator_filter_policy = packet[7]; 3086 switch (initiator_filter_policy){ 3087 case 0: 3088 // whitelist not used 3089 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3090 break; 3091 case 1: 3092 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3093 break; 3094 default: 3095 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3096 break; 3097 } 3098 } 3099 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3100 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3101 } 3102 #endif 3103 #endif 3104 3105 hci_stack->num_cmd_packets--; 3106 3107 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3108 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3109 3110 // release packet buffer for synchronous transport implementations 3111 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3112 hci_stack->hci_packet_buffer_reserved = 0; 3113 } 3114 3115 return err; 3116 } 3117 3118 // disconnect because of security block 3119 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3120 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3121 if (!connection) return; 3122 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3123 } 3124 3125 3126 // Configure Secure Simple Pairing 3127 3128 #ifdef ENABLE_CLASSIC 3129 3130 // enable will enable SSP during init 3131 void gap_ssp_set_enable(int enable){ 3132 hci_stack->ssp_enable = enable; 3133 } 3134 3135 static int hci_local_ssp_activated(void){ 3136 return gap_ssp_supported() && hci_stack->ssp_enable; 3137 } 3138 3139 // if set, BTstack will respond to io capability request using authentication requirement 3140 void gap_ssp_set_io_capability(int io_capability){ 3141 hci_stack->ssp_io_capability = io_capability; 3142 } 3143 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3144 hci_stack->ssp_authentication_requirement = authentication_requirement; 3145 } 3146 3147 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3148 void gap_ssp_set_auto_accept(int auto_accept){ 3149 hci_stack->ssp_auto_accept = auto_accept; 3150 } 3151 #endif 3152 3153 // va_list part of hci_send_cmd 3154 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3155 if (!hci_can_send_command_packet_now()){ 3156 log_error("hci_send_cmd called but cannot send packet now"); 3157 return 0; 3158 } 3159 3160 // for HCI INITIALIZATION 3161 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3162 hci_stack->last_cmd_opcode = cmd->opcode; 3163 3164 hci_reserve_packet_buffer(); 3165 uint8_t * packet = hci_stack->hci_packet_buffer; 3166 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3167 return hci_send_cmd_packet(packet, size); 3168 } 3169 3170 /** 3171 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3172 */ 3173 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3174 va_list argptr; 3175 va_start(argptr, cmd); 3176 int res = hci_send_cmd_va_arg(cmd, argptr); 3177 va_end(argptr); 3178 return res; 3179 } 3180 3181 // Create various non-HCI events. 3182 // TODO: generalize, use table similar to hci_create_command 3183 3184 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3185 // dump packet 3186 if (dump) { 3187 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3188 } 3189 3190 // dispatch to all event handlers 3191 btstack_linked_list_iterator_t it; 3192 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3193 while (btstack_linked_list_iterator_has_next(&it)){ 3194 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3195 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3196 } 3197 } 3198 3199 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3200 if (!hci_stack->acl_packet_handler) return; 3201 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3202 } 3203 3204 #ifdef ENABLE_CLASSIC 3205 static void hci_notify_if_sco_can_send_now(void){ 3206 // notify SCO sender if waiting 3207 if (!hci_stack->sco_waiting_for_can_send_now) return; 3208 if (hci_can_send_sco_packet_now()){ 3209 hci_stack->sco_waiting_for_can_send_now = 0; 3210 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3211 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3212 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3213 } 3214 } 3215 #endif 3216 3217 void hci_emit_state(void){ 3218 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3219 uint8_t event[3]; 3220 event[0] = BTSTACK_EVENT_STATE; 3221 event[1] = sizeof(event) - 2; 3222 event[2] = hci_stack->state; 3223 hci_emit_event(event, sizeof(event), 1); 3224 } 3225 3226 #ifdef ENABLE_CLASSIC 3227 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3228 uint8_t event[13]; 3229 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3230 event[1] = sizeof(event) - 2; 3231 event[2] = status; 3232 little_endian_store_16(event, 3, con_handle); 3233 reverse_bd_addr(address, &event[5]); 3234 event[11] = 1; // ACL connection 3235 event[12] = 0; // encryption disabled 3236 hci_emit_event(event, sizeof(event), 1); 3237 } 3238 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3239 if (disable_l2cap_timeouts) return; 3240 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3241 uint8_t event[4]; 3242 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3243 event[1] = sizeof(event) - 2; 3244 little_endian_store_16(event, 2, conn->con_handle); 3245 hci_emit_event(event, sizeof(event), 1); 3246 } 3247 #endif 3248 3249 #ifdef ENABLE_BLE 3250 #ifdef ENABLE_LE_CENTRAL 3251 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3252 uint8_t event[21]; 3253 event[0] = HCI_EVENT_LE_META; 3254 event[1] = sizeof(event) - 2; 3255 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3256 event[3] = status; 3257 little_endian_store_16(event, 4, con_handle); 3258 event[6] = 0; // TODO: role 3259 event[7] = address_type; 3260 reverse_bd_addr(address, &event[8]); 3261 little_endian_store_16(event, 14, 0); // interval 3262 little_endian_store_16(event, 16, 0); // latency 3263 little_endian_store_16(event, 18, 0); // supervision timeout 3264 event[20] = 0; // master clock accuracy 3265 hci_emit_event(event, sizeof(event), 1); 3266 } 3267 #endif 3268 #endif 3269 3270 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3271 uint8_t event[6]; 3272 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3273 event[1] = sizeof(event) - 2; 3274 event[2] = 0; // status = OK 3275 little_endian_store_16(event, 3, con_handle); 3276 event[5] = reason; 3277 hci_emit_event(event, sizeof(event), 1); 3278 } 3279 3280 static void hci_emit_nr_connections_changed(void){ 3281 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3282 uint8_t event[3]; 3283 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3284 event[1] = sizeof(event) - 2; 3285 event[2] = nr_hci_connections(); 3286 hci_emit_event(event, sizeof(event), 1); 3287 } 3288 3289 static void hci_emit_hci_open_failed(void){ 3290 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3291 uint8_t event[2]; 3292 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3293 event[1] = sizeof(event) - 2; 3294 hci_emit_event(event, sizeof(event), 1); 3295 } 3296 3297 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3298 log_info("hci_emit_dedicated_bonding_result %u ", status); 3299 uint8_t event[9]; 3300 int pos = 0; 3301 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3302 event[pos++] = sizeof(event) - 2; 3303 event[pos++] = status; 3304 reverse_bd_addr(address, &event[pos]); 3305 hci_emit_event(event, sizeof(event), 1); 3306 } 3307 3308 3309 #ifdef ENABLE_CLASSIC 3310 3311 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3312 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3313 uint8_t event[5]; 3314 int pos = 0; 3315 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3316 event[pos++] = sizeof(event) - 2; 3317 little_endian_store_16(event, 2, con_handle); 3318 pos += 2; 3319 event[pos++] = level; 3320 hci_emit_event(event, sizeof(event), 1); 3321 } 3322 3323 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3324 if (!connection) return LEVEL_0; 3325 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3326 return gap_security_level_for_link_key_type(connection->link_key_type); 3327 } 3328 3329 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3330 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3331 uint8_t event[3]; 3332 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3333 event[1] = sizeof(event) - 2; 3334 event[2] = enabled; 3335 hci_emit_event(event, sizeof(event), 1); 3336 } 3337 3338 #ifdef ENABLE_CLASSIC 3339 // query if remote side supports eSCO 3340 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3341 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3342 if (!connection) return 0; 3343 return connection->remote_supported_feature_eSCO; 3344 } 3345 3346 // query if remote side supports SSP 3347 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3348 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3349 if (!connection) return 0; 3350 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3351 } 3352 3353 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3354 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3355 } 3356 #endif 3357 3358 // GAP API 3359 /** 3360 * @bbrief enable/disable bonding. default is enabled 3361 * @praram enabled 3362 */ 3363 void gap_set_bondable_mode(int enable){ 3364 hci_stack->bondable = enable ? 1 : 0; 3365 } 3366 /** 3367 * @brief Get bondable mode. 3368 * @return 1 if bondable 3369 */ 3370 int gap_get_bondable_mode(void){ 3371 return hci_stack->bondable; 3372 } 3373 3374 /** 3375 * @brief map link keys to security levels 3376 */ 3377 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3378 switch (link_key_type){ 3379 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3380 return LEVEL_4; 3381 case COMBINATION_KEY: 3382 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3383 return LEVEL_3; 3384 default: 3385 return LEVEL_2; 3386 } 3387 } 3388 3389 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3390 log_info("gap_mitm_protection_required_for_security_level %u", level); 3391 return level > LEVEL_2; 3392 } 3393 3394 /** 3395 * @brief get current security level 3396 */ 3397 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3398 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3399 if (!connection) return LEVEL_0; 3400 return gap_security_level_for_connection(connection); 3401 } 3402 3403 /** 3404 * @brief request connection to device to 3405 * @result GAP_AUTHENTICATION_RESULT 3406 */ 3407 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3408 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3409 if (!connection){ 3410 hci_emit_security_level(con_handle, LEVEL_0); 3411 return; 3412 } 3413 gap_security_level_t current_level = gap_security_level(con_handle); 3414 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3415 if (current_level >= requested_level){ 3416 hci_emit_security_level(con_handle, current_level); 3417 return; 3418 } 3419 3420 connection->requested_security_level = requested_level; 3421 3422 #if 0 3423 // sending encryption request without a link key results in an error. 3424 // TODO: figure out how to use it properly 3425 3426 // would enabling ecnryption suffice (>= LEVEL_2)? 3427 if (hci_stack->link_key_db){ 3428 link_key_type_t link_key_type; 3429 link_key_t link_key; 3430 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3431 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3432 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3433 return; 3434 } 3435 } 3436 } 3437 #endif 3438 3439 // try to authenticate connection 3440 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3441 hci_run(); 3442 } 3443 3444 /** 3445 * @brief start dedicated bonding with device. disconnect after bonding 3446 * @param device 3447 * @param request MITM protection 3448 * @result GAP_DEDICATED_BONDING_COMPLETE 3449 */ 3450 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3451 3452 // create connection state machine 3453 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3454 3455 if (!connection){ 3456 return BTSTACK_MEMORY_ALLOC_FAILED; 3457 } 3458 3459 // delete linkn key 3460 gap_drop_link_key_for_bd_addr(device); 3461 3462 // configure LEVEL_2/3, dedicated bonding 3463 connection->state = SEND_CREATE_CONNECTION; 3464 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3465 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3466 connection->bonding_flags = BONDING_DEDICATED; 3467 3468 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3469 3470 // handle: connnection failure (connection complete != ok) 3471 // handle: authentication failure 3472 // handle: disconnect on done 3473 3474 hci_run(); 3475 3476 return 0; 3477 } 3478 #endif 3479 3480 void gap_set_local_name(const char * local_name){ 3481 hci_stack->local_name = local_name; 3482 } 3483 3484 3485 #ifdef ENABLE_BLE 3486 3487 #ifdef ENABLE_LE_CENTRAL 3488 void gap_start_scan(void){ 3489 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3490 hci_stack->le_scanning_state = LE_START_SCAN; 3491 hci_run(); 3492 } 3493 3494 void gap_stop_scan(void){ 3495 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3496 hci_stack->le_scanning_state = LE_STOP_SCAN; 3497 hci_run(); 3498 } 3499 3500 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3501 hci_stack->le_scan_type = scan_type; 3502 hci_stack->le_scan_interval = scan_interval; 3503 hci_stack->le_scan_window = scan_window; 3504 hci_run(); 3505 } 3506 3507 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3508 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3509 if (!conn){ 3510 log_info("gap_connect: no connection exists yet, creating context"); 3511 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3512 if (!conn){ 3513 // notify client that alloc failed 3514 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3515 log_info("gap_connect: failed to alloc hci_connection_t"); 3516 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3517 } 3518 conn->state = SEND_CREATE_CONNECTION; 3519 log_info("gap_connect: send create connection next"); 3520 hci_run(); 3521 return 0; 3522 } 3523 3524 if (!hci_is_le_connection(conn) || 3525 conn->state == SEND_CREATE_CONNECTION || 3526 conn->state == SENT_CREATE_CONNECTION) { 3527 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3528 log_error("gap_connect: classic connection or connect is already being created"); 3529 return GATT_CLIENT_IN_WRONG_STATE; 3530 } 3531 3532 log_info("gap_connect: context exists with state %u", conn->state); 3533 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3534 hci_run(); 3535 return 0; 3536 } 3537 3538 // @assumption: only a single outgoing LE Connection exists 3539 static hci_connection_t * gap_get_outgoing_connection(void){ 3540 btstack_linked_item_t *it; 3541 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3542 hci_connection_t * conn = (hci_connection_t *) it; 3543 if (!hci_is_le_connection(conn)) continue; 3544 switch (conn->state){ 3545 case SEND_CREATE_CONNECTION: 3546 case SENT_CREATE_CONNECTION: 3547 return conn; 3548 default: 3549 break; 3550 }; 3551 } 3552 return NULL; 3553 } 3554 3555 uint8_t gap_connect_cancel(void){ 3556 hci_connection_t * conn = gap_get_outgoing_connection(); 3557 if (!conn) return 0; 3558 switch (conn->state){ 3559 case SEND_CREATE_CONNECTION: 3560 // skip sending create connection and emit event instead 3561 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3562 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3563 btstack_memory_hci_connection_free( conn ); 3564 break; 3565 case SENT_CREATE_CONNECTION: 3566 // request to send cancel connection 3567 conn->state = SEND_CANCEL_CONNECTION; 3568 hci_run(); 3569 break; 3570 default: 3571 break; 3572 } 3573 return 0; 3574 } 3575 #endif 3576 3577 /** 3578 * @brief Updates the connection parameters for a given LE connection 3579 * @param handle 3580 * @param conn_interval_min (unit: 1.25ms) 3581 * @param conn_interval_max (unit: 1.25ms) 3582 * @param conn_latency 3583 * @param supervision_timeout (unit: 10ms) 3584 * @returns 0 if ok 3585 */ 3586 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3587 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3588 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3589 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3590 connection->le_conn_interval_min = conn_interval_min; 3591 connection->le_conn_interval_max = conn_interval_max; 3592 connection->le_conn_latency = conn_latency; 3593 connection->le_supervision_timeout = supervision_timeout; 3594 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3595 hci_run(); 3596 return 0; 3597 } 3598 3599 /** 3600 * @brief Request an update of the connection parameter for a given LE connection 3601 * @param handle 3602 * @param conn_interval_min (unit: 1.25ms) 3603 * @param conn_interval_max (unit: 1.25ms) 3604 * @param conn_latency 3605 * @param supervision_timeout (unit: 10ms) 3606 * @returns 0 if ok 3607 */ 3608 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3609 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3610 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3611 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3612 connection->le_conn_interval_min = conn_interval_min; 3613 connection->le_conn_interval_max = conn_interval_max; 3614 connection->le_conn_latency = conn_latency; 3615 connection->le_supervision_timeout = supervision_timeout; 3616 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3617 hci_run(); 3618 return 0; 3619 } 3620 3621 #ifdef ENABLE_LE_PERIPHERAL 3622 3623 static void gap_advertisments_changed(void){ 3624 // disable advertisements before updating adv, scan data, or adv params 3625 if (hci_stack->le_advertisements_active){ 3626 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3627 } 3628 hci_run(); 3629 } 3630 3631 /** 3632 * @brief Set Advertisement Data 3633 * @param advertising_data_length 3634 * @param advertising_data (max 31 octets) 3635 * @note data is not copied, pointer has to stay valid 3636 */ 3637 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3638 hci_stack->le_advertisements_data_len = advertising_data_length; 3639 hci_stack->le_advertisements_data = advertising_data; 3640 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3641 gap_advertisments_changed(); 3642 } 3643 3644 /** 3645 * @brief Set Scan Response Data 3646 * @param advertising_data_length 3647 * @param advertising_data (max 31 octets) 3648 * @note data is not copied, pointer has to stay valid 3649 */ 3650 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3651 hci_stack->le_scan_response_data_len = scan_response_data_length; 3652 hci_stack->le_scan_response_data = scan_response_data; 3653 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3654 gap_advertisments_changed(); 3655 } 3656 3657 /** 3658 * @brief Set Advertisement Parameters 3659 * @param adv_int_min 3660 * @param adv_int_max 3661 * @param adv_type 3662 * @param own_address_type 3663 * @param direct_address_type 3664 * @param direct_address 3665 * @param channel_map 3666 * @param filter_policy 3667 * 3668 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3669 */ 3670 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3671 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3672 uint8_t channel_map, uint8_t filter_policy) { 3673 3674 hci_stack->le_advertisements_interval_min = adv_int_min; 3675 hci_stack->le_advertisements_interval_max = adv_int_max; 3676 hci_stack->le_advertisements_type = adv_type; 3677 hci_stack->le_advertisements_own_address_type = own_address_type; 3678 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3679 hci_stack->le_advertisements_channel_map = channel_map; 3680 hci_stack->le_advertisements_filter_policy = filter_policy; 3681 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3682 3683 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3684 gap_advertisments_changed(); 3685 } 3686 3687 void hci_le_advertisements_set_own_address_type(uint8_t own_address_type){ 3688 hci_stack->le_advertisements_own_address_type = own_address_type; 3689 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3690 gap_advertisments_changed(); 3691 } 3692 3693 /** 3694 * @brief Enable/Disable Advertisements 3695 * @param enabled 3696 */ 3697 void gap_advertisements_enable(int enabled){ 3698 hci_stack->le_advertisements_enabled = enabled; 3699 if (enabled && !hci_stack->le_advertisements_active){ 3700 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3701 } 3702 if (!enabled && hci_stack->le_advertisements_active){ 3703 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3704 } 3705 hci_run(); 3706 } 3707 3708 #endif 3709 #endif 3710 3711 uint8_t gap_disconnect(hci_con_handle_t handle){ 3712 hci_connection_t * conn = hci_connection_for_handle(handle); 3713 if (!conn){ 3714 hci_emit_disconnection_complete(handle, 0); 3715 return 0; 3716 } 3717 conn->state = SEND_DISCONNECT; 3718 hci_run(); 3719 return 0; 3720 } 3721 3722 /** 3723 * @brief Get connection type 3724 * @param con_handle 3725 * @result connection_type 3726 */ 3727 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3728 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3729 if (!conn) return GAP_CONNECTION_INVALID; 3730 switch (conn->address_type){ 3731 case BD_ADDR_TYPE_LE_PUBLIC: 3732 case BD_ADDR_TYPE_LE_RANDOM: 3733 return GAP_CONNECTION_LE; 3734 case BD_ADDR_TYPE_SCO: 3735 return GAP_CONNECTION_SCO; 3736 case BD_ADDR_TYPE_CLASSIC: 3737 return GAP_CONNECTION_ACL; 3738 default: 3739 return GAP_CONNECTION_INVALID; 3740 } 3741 } 3742 3743 #ifdef ENABLE_BLE 3744 3745 #ifdef ENABLE_LE_CENTRAL 3746 /** 3747 * @brief Auto Connection Establishment - Start Connecting to device 3748 * @param address_typ 3749 * @param address 3750 * @returns 0 if ok 3751 */ 3752 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3753 // check capacity 3754 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3755 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3756 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3757 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3758 entry->address_type = address_type; 3759 memcpy(entry->address, address, 6); 3760 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3761 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3762 hci_run(); 3763 return 0; 3764 } 3765 3766 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3767 btstack_linked_list_iterator_t it; 3768 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3769 while (btstack_linked_list_iterator_has_next(&it)){ 3770 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3771 if (entry->address_type != address_type) continue; 3772 if (memcmp(entry->address, address, 6) != 0) continue; 3773 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3774 // remove from controller if already present 3775 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3776 continue; 3777 } 3778 // direclty remove entry from whitelist 3779 btstack_linked_list_iterator_remove(&it); 3780 btstack_memory_whitelist_entry_free(entry); 3781 } 3782 } 3783 3784 /** 3785 * @brief Auto Connection Establishment - Stop Connecting to device 3786 * @param address_typ 3787 * @param address 3788 * @returns 0 if ok 3789 */ 3790 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3791 hci_remove_from_whitelist(address_type, address); 3792 hci_run(); 3793 return 0; 3794 } 3795 3796 /** 3797 * @brief Auto Connection Establishment - Stop everything 3798 * @note Convenience function to stop all active auto connection attempts 3799 */ 3800 void gap_auto_connection_stop_all(void){ 3801 btstack_linked_list_iterator_t it; 3802 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3803 while (btstack_linked_list_iterator_has_next(&it)){ 3804 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3805 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3806 // remove from controller if already present 3807 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3808 continue; 3809 } 3810 // directly remove entry from whitelist 3811 btstack_linked_list_iterator_remove(&it); 3812 btstack_memory_whitelist_entry_free(entry); 3813 } 3814 hci_run(); 3815 } 3816 #endif 3817 #endif 3818 3819 #ifdef ENABLE_CLASSIC 3820 /** 3821 * @brief Set Extended Inquiry Response data 3822 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3823 * @note has to be done before stack starts up 3824 */ 3825 void gap_set_extended_inquiry_response(const uint8_t * data){ 3826 hci_stack->eir_data = data; 3827 } 3828 3829 /** 3830 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3831 * @param inquriy_mode see bluetooth_defines.h 3832 */ 3833 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3834 hci_stack->inquiry_mode = mode; 3835 } 3836 3837 /** 3838 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3839 */ 3840 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3841 hci_stack->sco_voice_setting = voice_setting; 3842 } 3843 3844 /** 3845 * @brief Get SCO Voice Setting 3846 * @return current voice setting 3847 */ 3848 uint16_t hci_get_sco_voice_setting(void){ 3849 return hci_stack->sco_voice_setting; 3850 } 3851 3852 /** @brief Get SCO packet length for current SCO Voice setting 3853 * @note Using SCO packets of the exact length is required for USB transfer 3854 * @return Length of SCO packets in bytes (not audio frames) 3855 */ 3856 int hci_get_sco_packet_length(void){ 3857 // see Core Spec for H2 USB Transfer. 3858 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3859 return 27; 3860 } 3861 #endif 3862 3863 /** 3864 * @brief Set callback for Bluetooth Hardware Error 3865 */ 3866 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3867 hci_stack->hardware_error_callback = fn; 3868 } 3869 3870 void hci_disconnect_all(void){ 3871 btstack_linked_list_iterator_t it; 3872 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3873 while (btstack_linked_list_iterator_has_next(&it)){ 3874 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3875 if (con->state == SENT_DISCONNECT) continue; 3876 con->state = SEND_DISCONNECT; 3877 } 3878 hci_run(); 3879 } 3880 3881 uint16_t hci_get_manufacturer(void){ 3882 return hci_stack->manufacturer; 3883 } 3884