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