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