1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef ENABLE_CLASSIC 49 #ifdef HAVE_EMBEDDED_TICK 50 #include "btstack_run_loop_embedded.h" 51 #endif 52 #endif 53 54 #ifdef HAVE_PLATFORM_IPHONE_OS 55 #include "../port/ios/src/btstack_control_iphone.h" 56 #endif 57 58 #ifdef ENABLE_BLE 59 #include "gap.h" 60 #endif 61 62 #include <stdarg.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <inttypes.h> 66 67 #include "btstack_debug.h" 68 #include "btstack_event.h" 69 #include "btstack_linked_list.h" 70 #include "btstack_memory.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 76 77 #define HCI_CONNECTION_TIMEOUT_MS 10000 78 #define HCI_RESET_RESEND_TIMEOUT_MS 200 79 80 // prototypes 81 #ifdef ENABLE_CLASSIC 82 static void hci_update_scan_enable(void); 83 static void hci_emit_discoverable_enabled(uint8_t enabled); 84 static int hci_local_ssp_activated(void); 85 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 86 static void hci_notify_if_sco_can_send_now(void); 87 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 88 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 89 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 90 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 91 static void hci_connection_timestamp(hci_connection_t *connection); 92 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 93 #endif 94 static int hci_power_control_on(void); 95 static void hci_power_control_off(void); 96 static void hci_state_reset(void); 97 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 98 static void hci_emit_nr_connections_changed(void); 99 static void hci_emit_hci_open_failed(void); 100 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 101 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 102 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 103 static void hci_run(void); 104 static int hci_is_le_connection(hci_connection_t * connection); 105 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 106 107 #ifdef ENABLE_BLE 108 #ifdef ENABLE_LE_CENTRAL 109 // called from test/ble_client/advertising_data_parser.c 110 void le_handle_advertisement_report(uint8_t *packet, int size); 111 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 112 #endif 113 #endif 114 115 // the STACK is here 116 #ifndef HAVE_MALLOC 117 static hci_stack_t hci_stack_static; 118 #endif 119 static hci_stack_t * hci_stack = NULL; 120 121 #ifdef ENABLE_CLASSIC 122 // test helper 123 static uint8_t disable_l2cap_timeouts = 0; 124 #endif 125 126 /** 127 * create connection for given address 128 * 129 * @return connection OR NULL, if no memory left 130 */ 131 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 132 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 133 hci_connection_t * conn = btstack_memory_hci_connection_get(); 134 if (!conn) return NULL; 135 memset(conn, 0, sizeof(hci_connection_t)); 136 bd_addr_copy(conn->address, addr); 137 conn->address_type = addr_type; 138 conn->con_handle = 0xffff; 139 conn->authentication_flags = AUTH_FLAGS_NONE; 140 conn->bonding_flags = 0; 141 conn->requested_security_level = LEVEL_0; 142 #ifdef ENABLE_CLASSIC 143 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 144 btstack_run_loop_set_timer_context(&conn->timeout, conn); 145 hci_connection_timestamp(conn); 146 #endif 147 conn->acl_recombination_length = 0; 148 conn->acl_recombination_pos = 0; 149 conn->num_acl_packets_sent = 0; 150 conn->num_sco_packets_sent = 0; 151 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 152 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 153 return conn; 154 } 155 156 157 /** 158 * get le connection parameter range 159 * 160 * @return le connection parameter range struct 161 */ 162 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 163 *range = hci_stack->le_connection_parameter_range; 164 } 165 166 /** 167 * set le connection parameter range 168 * 169 */ 170 171 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 172 hci_stack->le_connection_parameter_range = *range; 173 } 174 175 /** 176 * get hci connections iterator 177 * 178 * @return hci connections iterator 179 */ 180 181 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 182 btstack_linked_list_iterator_init(it, &hci_stack->connections); 183 } 184 185 /** 186 * get connection for a given handle 187 * 188 * @return connection OR NULL, if not found 189 */ 190 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 191 btstack_linked_list_iterator_t it; 192 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 193 while (btstack_linked_list_iterator_has_next(&it)){ 194 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 195 if ( item->con_handle == con_handle ) { 196 return item; 197 } 198 } 199 return NULL; 200 } 201 202 /** 203 * get connection for given address 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if (connection->address_type != addr_type) continue; 213 if (memcmp(addr, connection->address, 6) != 0) continue; 214 return connection; 215 } 216 return NULL; 217 } 218 219 220 #ifdef ENABLE_CLASSIC 221 222 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 223 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 224 #ifdef HAVE_EMBEDDED_TICK 225 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 226 // connections might be timed out 227 hci_emit_l2cap_check_timeout(connection); 228 } 229 #else 230 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 231 // connections might be timed out 232 hci_emit_l2cap_check_timeout(connection); 233 } 234 #endif 235 } 236 237 static void hci_connection_timestamp(hci_connection_t *connection){ 238 #ifdef HAVE_EMBEDDED_TICK 239 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 240 #else 241 connection->timestamp = btstack_run_loop_get_time_ms(); 242 #endif 243 } 244 245 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 246 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 247 } 248 249 250 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 251 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 252 } 253 254 /** 255 * add authentication flags and reset timer 256 * @note: assumes classic connection 257 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 258 */ 259 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 260 bd_addr_t addr; 261 reverse_bd_addr(bd_addr, addr); 262 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 263 if (conn) { 264 connectionSetAuthenticationFlags(conn, flags); 265 hci_connection_timestamp(conn); 266 } 267 } 268 269 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 270 hci_connection_t * conn = hci_connection_for_handle(handle); 271 if (!conn) return 0; 272 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 273 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 274 return 0; 275 } 276 277 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 278 if (!hci_stack->link_key_db) return; 279 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 280 hci_stack->link_key_db->delete_link_key(addr); 281 } 282 283 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 284 if (!hci_stack->link_key_db) return; 285 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 286 hci_stack->link_key_db->put_link_key(addr, link_key, type); 287 } 288 #endif 289 290 static int hci_is_le_connection(hci_connection_t * connection){ 291 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 292 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 293 } 294 295 /** 296 * count connections 297 */ 298 static int nr_hci_connections(void){ 299 int count = 0; 300 btstack_linked_item_t *it; 301 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 302 return count; 303 } 304 305 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 306 307 unsigned int num_packets_sent_classic = 0; 308 unsigned int num_packets_sent_le = 0; 309 310 btstack_linked_item_t *it; 311 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 312 hci_connection_t * connection = (hci_connection_t *) it; 313 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 314 num_packets_sent_classic += connection->num_acl_packets_sent; 315 } else { 316 num_packets_sent_le += connection->num_acl_packets_sent; 317 } 318 } 319 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 320 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 321 int free_slots_le = 0; 322 323 if (free_slots_classic < 0){ 324 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 325 return 0; 326 } 327 328 if (hci_stack->le_acl_packets_total_num){ 329 // if we have LE slots, they are used 330 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 331 if (free_slots_le < 0){ 332 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 333 return 0; 334 } 335 } else { 336 // otherwise, classic slots are used for LE, too 337 free_slots_classic -= num_packets_sent_le; 338 if (free_slots_classic < 0){ 339 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 340 return 0; 341 } 342 } 343 344 switch (address_type){ 345 case BD_ADDR_TYPE_UNKNOWN: 346 log_error("hci_number_free_acl_slots: unknown address type"); 347 return 0; 348 349 case BD_ADDR_TYPE_CLASSIC: 350 return free_slots_classic; 351 352 default: 353 if (hci_stack->le_acl_packets_total_num){ 354 return free_slots_le; 355 } 356 return free_slots_classic; 357 } 358 } 359 360 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 361 // get connection type 362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 363 if (!connection){ 364 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 365 return 0; 366 } 367 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 368 } 369 370 #ifdef ENABLE_CLASSIC 371 static int hci_number_free_sco_slots(void){ 372 unsigned int num_sco_packets_sent = 0; 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 num_sco_packets_sent += connection->num_sco_packets_sent; 377 } 378 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 379 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 380 return 0; 381 } 382 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 383 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 384 } 385 #endif 386 387 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 388 int hci_can_send_command_packet_now(void){ 389 if (hci_stack->hci_packet_buffer_reserved) return 0; 390 391 // check for async hci transport implementations 392 if (hci_stack->hci_transport->can_send_packet_now){ 393 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 394 return 0; 395 } 396 } 397 398 return hci_stack->num_cmd_packets > 0; 399 } 400 401 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 402 // check for async hci transport implementations 403 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 404 return hci_stack->hci_transport->can_send_packet_now(packet_type); 405 } 406 407 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 410 } 411 412 int hci_can_send_acl_le_packet_now(void){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 415 } 416 417 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 418 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 419 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 420 } 421 422 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 423 if (hci_stack->hci_packet_buffer_reserved) return 0; 424 return hci_can_send_prepared_acl_packet_now(con_handle); 425 } 426 427 #ifdef ENABLE_CLASSIC 428 int hci_can_send_acl_classic_packet_now(void){ 429 if (hci_stack->hci_packet_buffer_reserved) return 0; 430 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 431 } 432 433 int hci_can_send_prepared_sco_packet_now(void){ 434 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 435 if (!hci_stack->synchronous_flow_control_enabled) return 1; 436 return hci_number_free_sco_slots() > 0; 437 } 438 439 int hci_can_send_sco_packet_now(void){ 440 if (hci_stack->hci_packet_buffer_reserved) return 0; 441 return hci_can_send_prepared_sco_packet_now(); 442 } 443 444 void hci_request_sco_can_send_now_event(void){ 445 hci_stack->sco_waiting_for_can_send_now = 1; 446 hci_notify_if_sco_can_send_now(); 447 } 448 #endif 449 450 // used for internal checks in l2cap.c 451 int hci_is_packet_buffer_reserved(void){ 452 return hci_stack->hci_packet_buffer_reserved; 453 } 454 455 // reserves outgoing packet buffer. @returns 1 if successful 456 int hci_reserve_packet_buffer(void){ 457 if (hci_stack->hci_packet_buffer_reserved) { 458 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 459 return 0; 460 } 461 hci_stack->hci_packet_buffer_reserved = 1; 462 return 1; 463 } 464 465 void hci_release_packet_buffer(void){ 466 hci_stack->hci_packet_buffer_reserved = 0; 467 } 468 469 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 470 static int hci_transport_synchronous(void){ 471 return hci_stack->hci_transport->can_send_packet_now == NULL; 472 } 473 474 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 475 476 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 477 478 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 479 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 480 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 481 max_acl_data_packet_length = hci_stack->le_data_packets_length; 482 } 483 484 // testing: reduce buffer to minimum 485 // max_acl_data_packet_length = 52; 486 487 log_debug("hci_send_acl_packet_fragments entered"); 488 489 int err; 490 // multiple packets could be send on a synchronous HCI transport 491 while (1){ 492 493 log_debug("hci_send_acl_packet_fragments loop entered"); 494 495 // get current data 496 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 497 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 498 int more_fragments = 0; 499 500 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 501 if (current_acl_data_packet_length > max_acl_data_packet_length){ 502 more_fragments = 1; 503 current_acl_data_packet_length = max_acl_data_packet_length; 504 } 505 506 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 507 if (acl_header_pos > 0){ 508 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 509 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 510 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 511 } 512 513 // update header len 514 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 515 516 // count packet 517 connection->num_acl_packets_sent++; 518 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 519 520 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 521 if (more_fragments){ 522 // update start of next fragment to send 523 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 524 } else { 525 // done 526 hci_stack->acl_fragmentation_pos = 0; 527 hci_stack->acl_fragmentation_total_size = 0; 528 } 529 530 // send packet 531 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 532 const int size = current_acl_data_packet_length + 4; 533 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 534 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 535 536 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 537 538 // done yet? 539 if (!more_fragments) break; 540 541 // can send more? 542 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 543 } 544 545 log_debug("hci_send_acl_packet_fragments loop over"); 546 547 // release buffer now for synchronous transport 548 if (hci_transport_synchronous()){ 549 hci_release_packet_buffer(); 550 // notify upper stack that it might be possible to send again 551 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 552 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 553 } 554 555 return err; 556 } 557 558 // pre: caller has reserved the packet buffer 559 int hci_send_acl_packet_buffer(int size){ 560 561 // log_info("hci_send_acl_packet_buffer size %u", size); 562 563 if (!hci_stack->hci_packet_buffer_reserved) { 564 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 565 return 0; 566 } 567 568 uint8_t * packet = hci_stack->hci_packet_buffer; 569 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 570 571 // check for free places on Bluetooth module 572 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 573 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 574 hci_release_packet_buffer(); 575 return BTSTACK_ACL_BUFFERS_FULL; 576 } 577 578 hci_connection_t *connection = hci_connection_for_handle( con_handle); 579 if (!connection) { 580 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 581 hci_release_packet_buffer(); 582 return 0; 583 } 584 585 #ifdef ENABLE_CLASSIC 586 hci_connection_timestamp(connection); 587 #endif 588 589 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 590 591 // setup data 592 hci_stack->acl_fragmentation_total_size = size; 593 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 594 595 return hci_send_acl_packet_fragments(connection); 596 } 597 598 #ifdef ENABLE_CLASSIC 599 // pre: caller has reserved the packet buffer 600 int hci_send_sco_packet_buffer(int size){ 601 602 // log_info("hci_send_acl_packet_buffer size %u", size); 603 604 if (!hci_stack->hci_packet_buffer_reserved) { 605 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 606 return 0; 607 } 608 609 uint8_t * packet = hci_stack->hci_packet_buffer; 610 611 // skip checks in loopback mode 612 if (!hci_stack->loopback_mode){ 613 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 614 615 // check for free places on Bluetooth module 616 if (!hci_can_send_prepared_sco_packet_now()) { 617 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 618 hci_release_packet_buffer(); 619 return BTSTACK_ACL_BUFFERS_FULL; 620 } 621 622 // track send packet in connection struct 623 hci_connection_t *connection = hci_connection_for_handle( con_handle); 624 if (!connection) { 625 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 626 hci_release_packet_buffer(); 627 return 0; 628 } 629 connection->num_sco_packets_sent++; 630 } 631 632 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 633 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 634 635 if (hci_transport_synchronous()){ 636 hci_release_packet_buffer(); 637 // notify upper stack that it might be possible to send again 638 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 639 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 640 } 641 642 return err; 643 } 644 #endif 645 646 static void acl_handler(uint8_t *packet, int size){ 647 648 // log_info("acl_handler: size %u", size); 649 650 // get info 651 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 652 hci_connection_t *conn = hci_connection_for_handle(con_handle); 653 uint8_t acl_flags = READ_ACL_FLAGS(packet); 654 uint16_t acl_length = READ_ACL_LENGTH(packet); 655 656 // ignore non-registered handle 657 if (!conn){ 658 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 659 return; 660 } 661 662 // assert packet is complete 663 if (acl_length + 4 != size){ 664 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 665 return; 666 } 667 668 #ifdef ENABLE_CLASSIC 669 // update idle timestamp 670 hci_connection_timestamp(conn); 671 #endif 672 673 // handle different packet types 674 switch (acl_flags & 0x03) { 675 676 case 0x01: // continuation fragment 677 678 // sanity checks 679 if (conn->acl_recombination_pos == 0) { 680 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 681 return; 682 } 683 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 684 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 685 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 686 conn->acl_recombination_pos = 0; 687 return; 688 } 689 690 // append fragment payload (header already stored) 691 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 692 conn->acl_recombination_pos += acl_length; 693 694 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 695 // conn->acl_recombination_pos, conn->acl_recombination_length); 696 697 // forward complete L2CAP packet if complete. 698 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 699 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 700 // reset recombination buffer 701 conn->acl_recombination_length = 0; 702 conn->acl_recombination_pos = 0; 703 } 704 break; 705 706 case 0x02: { // first fragment 707 708 // sanity check 709 if (conn->acl_recombination_pos) { 710 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 711 conn->acl_recombination_pos = 0; 712 } 713 714 // peek into L2CAP packet! 715 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 716 717 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 718 719 // compare fragment size to L2CAP packet size 720 if (acl_length >= l2cap_length + 4){ 721 // forward fragment as L2CAP packet 722 hci_emit_acl_packet(packet, acl_length + 4); 723 } else { 724 725 if (acl_length > HCI_ACL_BUFFER_SIZE){ 726 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 727 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 728 return; 729 } 730 731 // store first fragment and tweak acl length for complete package 732 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 733 conn->acl_recombination_pos = acl_length + 4; 734 conn->acl_recombination_length = l2cap_length; 735 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 736 } 737 break; 738 739 } 740 default: 741 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 742 return; 743 } 744 745 // execute main loop 746 hci_run(); 747 } 748 749 static void hci_shutdown_connection(hci_connection_t *conn){ 750 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 751 752 btstack_run_loop_remove_timer(&conn->timeout); 753 754 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 755 btstack_memory_hci_connection_free( conn ); 756 757 // now it's gone 758 hci_emit_nr_connections_changed(); 759 } 760 761 #ifdef ENABLE_CLASSIC 762 763 static const uint16_t packet_type_sizes[] = { 764 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 765 HCI_ACL_DH1_SIZE, 0, 0, 0, 766 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 767 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 768 }; 769 static const uint8_t packet_type_feature_requirement_bit[] = { 770 0, // 3 slot packets 771 1, // 5 slot packets 772 25, // EDR 2 mpbs 773 26, // EDR 3 mbps 774 39, // 3 slot EDR packts 775 40, // 5 slot EDR packet 776 }; 777 static const uint16_t packet_type_feature_packet_mask[] = { 778 0x0f00, // 3 slot packets 779 0xf000, // 5 slot packets 780 0x1102, // EDR 2 mpbs 781 0x2204, // EDR 3 mbps 782 0x0300, // 3 slot EDR packts 783 0x3000, // 5 slot EDR packet 784 }; 785 786 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 787 // enable packet types based on size 788 uint16_t packet_types = 0; 789 unsigned int i; 790 for (i=0;i<16;i++){ 791 if (packet_type_sizes[i] == 0) continue; 792 if (packet_type_sizes[i] <= buffer_size){ 793 packet_types |= 1 << i; 794 } 795 } 796 // disable packet types due to missing local supported features 797 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 798 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 799 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 800 if (feature_set) continue; 801 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 802 packet_types &= ~packet_type_feature_packet_mask[i]; 803 } 804 // flip bits for "may not be used" 805 packet_types ^= 0x3306; 806 return packet_types; 807 } 808 809 uint16_t hci_usable_acl_packet_types(void){ 810 return hci_stack->packet_types; 811 } 812 #endif 813 814 uint8_t* hci_get_outgoing_packet_buffer(void){ 815 // hci packet buffer is >= acl data packet length 816 return hci_stack->hci_packet_buffer; 817 } 818 819 uint16_t hci_max_acl_data_packet_length(void){ 820 return hci_stack->acl_data_packet_length; 821 } 822 823 #ifdef ENABLE_CLASSIC 824 int hci_extended_sco_link_supported(void){ 825 // No. 31, byte 3, bit 7 826 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 827 } 828 #endif 829 830 int hci_non_flushable_packet_boundary_flag_supported(void){ 831 // No. 54, byte 6, bit 6 832 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 833 } 834 835 static int gap_ssp_supported(void){ 836 // No. 51, byte 6, bit 3 837 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 838 } 839 840 static int hci_classic_supported(void){ 841 #ifdef ENABLE_CLASSIC 842 // No. 37, byte 4, bit 5, = No BR/EDR Support 843 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 844 #else 845 return 0; 846 #endif 847 } 848 849 static int hci_le_supported(void){ 850 #ifdef ENABLE_BLE 851 // No. 37, byte 4, bit 6 = LE Supported (Controller) 852 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 853 #else 854 return 0; 855 #endif 856 } 857 858 #ifdef ENABLE_BLE 859 860 /** 861 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 862 */ 863 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 864 *addr_type = hci_stack->le_own_addr_type; 865 if (hci_stack->le_own_addr_type){ 866 memcpy(addr, hci_stack->le_random_address, 6); 867 } else { 868 memcpy(addr, hci_stack->local_bd_addr, 6); 869 } 870 } 871 872 #ifdef ENABLE_LE_CENTRAL 873 void le_handle_advertisement_report(uint8_t *packet, int size){ 874 875 UNUSED(size); 876 877 int offset = 3; 878 int num_reports = packet[offset]; 879 offset += 1; 880 881 int i; 882 // log_info("HCI: handle adv report with num reports: %d", num_reports); 883 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 884 for (i=0; i<num_reports;i++){ 885 uint8_t data_length = packet[offset + 8]; 886 uint8_t event_size = 10 + data_length; 887 int pos = 0; 888 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 889 event[pos++] = event_size; 890 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 891 offset += 8; 892 pos += 8; 893 event[pos++] = packet[offset + 1 + data_length]; // rssi 894 event[pos++] = packet[offset++]; //data_length; 895 memcpy(&event[pos], &packet[offset], data_length); 896 pos += data_length; 897 offset += data_length + 1; // rssi 898 hci_emit_event(event, pos, 1); 899 } 900 } 901 #endif 902 #endif 903 904 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 905 906 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 907 if (!hci_stack->config) return 0; 908 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 909 // Limit baud rate for Broadcom chipsets to 3 mbps 910 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 911 baud_rate = 3000000; 912 } 913 return baud_rate; 914 } 915 916 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 917 UNUSED(ds); 918 919 switch (hci_stack->substate){ 920 case HCI_INIT_W4_SEND_RESET: 921 log_info("Resend HCI Reset"); 922 hci_stack->substate = HCI_INIT_SEND_RESET; 923 hci_stack->num_cmd_packets = 1; 924 hci_run(); 925 break; 926 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 927 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 928 if (hci_stack->hci_transport->reset_link){ 929 hci_stack->hci_transport->reset_link(); 930 } 931 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 932 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 933 log_info("Resend HCI Reset - CSR Warm Boot"); 934 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 935 hci_stack->num_cmd_packets = 1; 936 hci_run(); 937 break; 938 case HCI_INIT_W4_SEND_BAUD_CHANGE: 939 if (hci_stack->hci_transport->set_baudrate){ 940 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 941 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 942 hci_stack->hci_transport->set_baudrate(baud_rate); 943 } 944 // For CSR, HCI Reset is sent on new baud rate 945 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 946 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 947 hci_run(); 948 } 949 break; 950 default: 951 break; 952 } 953 } 954 #endif 955 956 static void hci_initializing_next_state(void){ 957 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 958 } 959 960 // assumption: hci_can_send_command_packet_now() == true 961 static void hci_initializing_run(void){ 962 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 963 switch (hci_stack->substate){ 964 case HCI_INIT_SEND_RESET: 965 hci_state_reset(); 966 967 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 968 // prepare reset if command complete not received in 100ms 969 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 970 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 971 btstack_run_loop_add_timer(&hci_stack->timeout); 972 #endif 973 // send command 974 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 975 hci_send_cmd(&hci_reset); 976 break; 977 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 978 hci_send_cmd(&hci_read_local_version_information); 979 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 980 break; 981 case HCI_INIT_SEND_READ_LOCAL_NAME: 982 hci_send_cmd(&hci_read_local_name); 983 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 984 break; 985 986 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 987 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 988 hci_state_reset(); 989 // prepare reset if command complete not received in 100ms 990 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 991 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 992 btstack_run_loop_add_timer(&hci_stack->timeout); 993 // send command 994 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 995 hci_send_cmd(&hci_reset); 996 break; 997 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 998 hci_state_reset(); 999 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1000 hci_send_cmd(&hci_reset); 1001 break; 1002 case HCI_INIT_SEND_BAUD_CHANGE: { 1003 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1004 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1005 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1006 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1007 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1008 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1009 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1010 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1011 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1012 btstack_run_loop_add_timer(&hci_stack->timeout); 1013 } 1014 break; 1015 } 1016 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1017 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1018 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1019 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1020 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1021 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1022 break; 1023 } 1024 case HCI_INIT_CUSTOM_INIT: 1025 // Custom initialization 1026 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1027 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1028 if (valid_cmd){ 1029 int size = 3 + hci_stack->hci_packet_buffer[2]; 1030 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1031 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1032 switch (valid_cmd) { 1033 case 1: 1034 default: 1035 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1036 break; 1037 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1038 log_info("CSR Warm Boot"); 1039 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1040 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1041 btstack_run_loop_add_timer(&hci_stack->timeout); 1042 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1043 && hci_stack->config 1044 && hci_stack->chipset 1045 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1046 && hci_stack->hci_transport->set_baudrate 1047 && hci_transport_uart_get_main_baud_rate()){ 1048 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1049 } else { 1050 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1051 } 1052 break; 1053 } 1054 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1055 break; 1056 } 1057 log_info("Init script done"); 1058 1059 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1060 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1061 int need_baud_change = hci_stack->config 1062 && hci_stack->chipset 1063 && hci_stack->chipset->set_baudrate_command 1064 && hci_stack->hci_transport->set_baudrate 1065 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1066 if (need_baud_change) { 1067 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1068 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1069 hci_stack->hci_transport->set_baudrate(baud_rate); 1070 } 1071 } 1072 } 1073 // otherwise continue 1074 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1075 hci_send_cmd(&hci_read_local_supported_commands); 1076 break; 1077 case HCI_INIT_SET_BD_ADDR: 1078 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1079 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1080 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1081 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1082 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1083 break; 1084 #endif 1085 1086 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1087 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1088 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1089 hci_send_cmd(&hci_read_local_supported_commands); 1090 break; 1091 case HCI_INIT_READ_BD_ADDR: 1092 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1093 hci_send_cmd(&hci_read_bd_addr); 1094 break; 1095 case HCI_INIT_READ_BUFFER_SIZE: 1096 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1097 hci_send_cmd(&hci_read_buffer_size); 1098 break; 1099 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1100 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1101 hci_send_cmd(&hci_read_local_supported_features); 1102 break; 1103 case HCI_INIT_SET_EVENT_MASK: 1104 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1105 if (hci_le_supported()){ 1106 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1107 } else { 1108 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1109 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1110 } 1111 break; 1112 #ifdef ENABLE_CLASSIC 1113 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1114 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1115 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1116 break; 1117 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1118 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1119 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1120 break; 1121 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1122 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1123 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1124 break; 1125 case HCI_INIT_WRITE_LOCAL_NAME: 1126 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1127 if (hci_stack->local_name){ 1128 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1129 } else { 1130 char local_name[8+17+1]; 1131 // BTstack 11:22:33:44:55:66 1132 memcpy(local_name, "BTstack ", 8); 1133 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1134 local_name[8+17] = '\0'; 1135 log_info("---> Name %s", local_name); 1136 hci_send_cmd(&hci_write_local_name, local_name); 1137 } 1138 break; 1139 case HCI_INIT_WRITE_EIR_DATA: 1140 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1141 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1142 break; 1143 case HCI_INIT_WRITE_INQUIRY_MODE: 1144 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1145 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1146 break; 1147 case HCI_INIT_WRITE_SCAN_ENABLE: 1148 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1149 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1150 break; 1151 // only sent if ENABLE_SCO_OVER_HCI is defined 1152 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1153 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1154 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1155 break; 1156 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1157 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1158 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1159 break; 1160 #endif 1161 #ifdef ENABLE_BLE 1162 // LE INIT 1163 case HCI_INIT_LE_READ_BUFFER_SIZE: 1164 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1165 hci_send_cmd(&hci_le_read_buffer_size); 1166 break; 1167 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1168 // LE Supported Host = 1, Simultaneous Host = 0 1169 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1170 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1171 break; 1172 #ifdef ENABLE_LE_CENTRAL 1173 case HCI_INIT_READ_WHITE_LIST_SIZE: 1174 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1175 hci_send_cmd(&hci_le_read_white_list_size); 1176 break; 1177 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1178 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1179 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1180 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1181 break; 1182 #endif 1183 #endif 1184 default: 1185 return; 1186 } 1187 } 1188 1189 static void hci_init_done(void){ 1190 // done. tell the app 1191 log_info("hci_init_done -> HCI_STATE_WORKING"); 1192 hci_stack->state = HCI_STATE_WORKING; 1193 hci_emit_state(); 1194 hci_run(); 1195 } 1196 1197 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1198 UNUSED(size); 1199 1200 uint8_t command_completed = 0; 1201 1202 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1203 uint16_t opcode = little_endian_read_16(packet,3); 1204 if (opcode == hci_stack->last_cmd_opcode){ 1205 command_completed = 1; 1206 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1207 } else { 1208 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1209 } 1210 } 1211 1212 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1213 uint8_t status = packet[2]; 1214 uint16_t opcode = little_endian_read_16(packet,4); 1215 if (opcode == hci_stack->last_cmd_opcode){ 1216 if (status){ 1217 command_completed = 1; 1218 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1219 } else { 1220 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1221 } 1222 } else { 1223 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1224 } 1225 } 1226 1227 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1228 1229 // Vendor == CSR 1230 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1231 // TODO: track actual command 1232 command_completed = 1; 1233 } 1234 1235 // Vendor == Toshiba 1236 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1237 // TODO: track actual command 1238 command_completed = 1; 1239 } 1240 1241 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1242 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1243 // 1244 // HCI Reset 1245 // Timeout 100 ms 1246 // HCI Reset 1247 // Command Complete Reset 1248 // HCI Read Local Version Information 1249 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1250 // hang... 1251 // 1252 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1253 if (!command_completed 1254 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1255 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1256 1257 uint16_t opcode = little_endian_read_16(packet,3); 1258 if (opcode == hci_reset.opcode){ 1259 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1260 return; 1261 } 1262 } 1263 1264 // CSR & H5 1265 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1266 if (!command_completed 1267 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1268 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1269 1270 uint16_t opcode = little_endian_read_16(packet,3); 1271 if (opcode == hci_reset.opcode){ 1272 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1273 return; 1274 } 1275 } 1276 1277 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1278 // fix: Correct substate and behave as command below 1279 if (command_completed){ 1280 switch (hci_stack->substate){ 1281 case HCI_INIT_SEND_RESET: 1282 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1283 break; 1284 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1285 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1286 break; 1287 default: 1288 break; 1289 } 1290 } 1291 1292 #endif 1293 1294 if (!command_completed) return; 1295 1296 int need_baud_change = 0; 1297 int need_addr_change = 0; 1298 1299 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1300 need_baud_change = hci_stack->config 1301 && hci_stack->chipset 1302 && hci_stack->chipset->set_baudrate_command 1303 && hci_stack->hci_transport->set_baudrate 1304 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1305 1306 need_addr_change = hci_stack->custom_bd_addr_set 1307 && hci_stack->chipset 1308 && hci_stack->chipset->set_bd_addr_command; 1309 #endif 1310 1311 switch(hci_stack->substate){ 1312 1313 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1314 case HCI_INIT_SEND_RESET: 1315 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1316 // fix: just correct substate and behave as command below 1317 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1318 btstack_run_loop_remove_timer(&hci_stack->timeout); 1319 break; 1320 case HCI_INIT_W4_SEND_RESET: 1321 btstack_run_loop_remove_timer(&hci_stack->timeout); 1322 break; 1323 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1324 log_info("Received local name, need baud change %d", need_baud_change); 1325 if (need_baud_change){ 1326 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1327 return; 1328 } 1329 // skip baud change 1330 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1331 return; 1332 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1333 // for STLC2500D, baud rate change already happened. 1334 // for others, baud rate gets changed now 1335 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1336 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1337 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1338 hci_stack->hci_transport->set_baudrate(baud_rate); 1339 } 1340 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1341 return; 1342 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1343 btstack_run_loop_remove_timer(&hci_stack->timeout); 1344 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1345 return; 1346 case HCI_INIT_W4_CUSTOM_INIT: 1347 // repeat custom init 1348 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1349 return; 1350 #else 1351 case HCI_INIT_W4_SEND_RESET: 1352 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1353 return ; 1354 #endif 1355 1356 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1357 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1358 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1359 return; 1360 } 1361 if (need_addr_change){ 1362 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1363 return; 1364 } 1365 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1366 return; 1367 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1368 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1369 if (need_baud_change){ 1370 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1371 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1372 hci_stack->hci_transport->set_baudrate(baud_rate); 1373 } 1374 if (need_addr_change){ 1375 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1376 return; 1377 } 1378 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1379 return; 1380 case HCI_INIT_W4_SET_BD_ADDR: 1381 // for STLC2500D, bd addr change only gets active after sending reset command 1382 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1383 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1384 return; 1385 } 1386 // skipping st warm boot 1387 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1388 return; 1389 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1390 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1391 return; 1392 #endif 1393 case HCI_INIT_W4_READ_BD_ADDR: 1394 // only read buffer size if supported 1395 if (hci_stack->local_supported_commands[0] & 0x01) { 1396 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1397 return; 1398 } 1399 // skipping read buffer size 1400 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1401 return; 1402 case HCI_INIT_W4_SET_EVENT_MASK: 1403 // skip Classic init commands for LE only chipsets 1404 if (!hci_classic_supported()){ 1405 if (hci_le_supported()){ 1406 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1407 return; 1408 } else { 1409 log_error("Neither BR/EDR nor LE supported"); 1410 hci_init_done(); 1411 return; 1412 } 1413 } 1414 if (!gap_ssp_supported()){ 1415 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1416 return; 1417 } 1418 break; 1419 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1420 // skip write le host if not supported (e.g. on LE only EM9301) 1421 if (hci_stack->local_supported_commands[0] & 0x02) break; 1422 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1423 return; 1424 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1425 // skip write eir data if no eir data set 1426 if (hci_stack->eir_data) break; 1427 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1428 return; 1429 1430 #ifdef ENABLE_SCO_OVER_HCI 1431 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1432 // skip write synchronous flow control if not supported 1433 if (hci_stack->local_supported_commands[0] & 0x04) break; 1434 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1435 // explicit fall through to reduce repetitions 1436 1437 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1438 // skip write default erroneous data reporting if not supported 1439 if (hci_stack->local_supported_commands[0] & 0x08) break; 1440 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1441 // explicit fall through to reduce repetitions 1442 1443 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1444 if (!hci_le_supported()){ 1445 // SKIP LE init for Classic only configuration 1446 hci_init_done(); 1447 return; 1448 } 1449 break; 1450 #else 1451 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1452 if (!hci_le_supported()){ 1453 // SKIP LE init for Classic only configuration 1454 hci_init_done(); 1455 return; 1456 } 1457 #endif 1458 break; 1459 // Response to command before init done state -> init done 1460 case (HCI_INIT_DONE-1): 1461 hci_init_done(); 1462 return; 1463 1464 default: 1465 break; 1466 } 1467 hci_initializing_next_state(); 1468 } 1469 1470 static void event_handler(uint8_t *packet, int size){ 1471 1472 uint16_t event_length = packet[1]; 1473 1474 // assert packet is complete 1475 if (size != event_length + 2){ 1476 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1477 return; 1478 } 1479 1480 bd_addr_t addr; 1481 bd_addr_type_t addr_type; 1482 uint8_t link_type; 1483 hci_con_handle_t handle; 1484 hci_connection_t * conn; 1485 int i; 1486 1487 // warnings 1488 (void) link_type; 1489 1490 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1491 1492 switch (hci_event_packet_get_type(packet)) { 1493 1494 case HCI_EVENT_COMMAND_COMPLETE: 1495 // get num cmd packets - limit to 1 to reduce complexity 1496 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1497 1498 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1499 if (packet[5]) break; 1500 // terminate, name 248 chars 1501 packet[6+248] = 0; 1502 log_info("local name: %s", &packet[6]); 1503 } 1504 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1505 // from offset 5 1506 // status 1507 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1508 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1509 hci_stack->sco_data_packet_length = packet[8]; 1510 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1511 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1512 1513 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1514 // determine usable ACL payload size 1515 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1516 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1517 } 1518 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1519 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1520 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1521 } 1522 } 1523 #ifdef ENABLE_BLE 1524 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1525 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1526 hci_stack->le_acl_packets_total_num = packet[8]; 1527 // determine usable ACL payload size 1528 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1529 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1530 } 1531 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1532 } 1533 #ifdef ENABLE_LE_CENTRAL 1534 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1535 hci_stack->le_whitelist_capacity = packet[6]; 1536 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1537 } 1538 #endif 1539 #endif 1540 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1541 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1542 hci_stack->local_bd_addr); 1543 log_info("Local Address, Status: 0x%02x: Addr: %s", 1544 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1545 #ifdef ENABLE_CLASSIC 1546 if (hci_stack->link_key_db){ 1547 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1548 } 1549 #endif 1550 } 1551 #ifdef ENABLE_CLASSIC 1552 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1553 hci_emit_discoverable_enabled(hci_stack->discoverable); 1554 } 1555 #endif 1556 1557 // Note: HCI init checks 1558 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1559 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1560 1561 #ifdef ENABLE_CLASSIC 1562 // determine usable ACL packet types based on host buffer size and supported features 1563 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1564 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1565 #endif 1566 // Classic/LE 1567 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1568 } 1569 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1570 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1571 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1572 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1573 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1574 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1575 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1576 } 1577 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1578 hci_stack->local_supported_commands[0] = 1579 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1580 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1581 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1582 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1583 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1584 } 1585 #ifdef ENABLE_CLASSIC 1586 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1587 if (packet[5] == 0){ 1588 hci_stack->synchronous_flow_control_enabled = 1; 1589 } 1590 } 1591 #endif 1592 break; 1593 1594 case HCI_EVENT_COMMAND_STATUS: 1595 // get num cmd packets - limit to 1 to reduce complexity 1596 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1597 break; 1598 1599 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1600 int offset = 3; 1601 for (i=0; i<packet[2];i++){ 1602 handle = little_endian_read_16(packet, offset); 1603 offset += 2; 1604 uint16_t num_packets = little_endian_read_16(packet, offset); 1605 offset += 2; 1606 1607 conn = hci_connection_for_handle(handle); 1608 if (!conn){ 1609 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1610 continue; 1611 } 1612 1613 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1614 #ifdef ENABLE_CLASSIC 1615 if (conn->num_sco_packets_sent >= num_packets){ 1616 conn->num_sco_packets_sent -= num_packets; 1617 } else { 1618 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1619 conn->num_sco_packets_sent = 0; 1620 } 1621 hci_notify_if_sco_can_send_now(); 1622 #endif 1623 } else { 1624 if (conn->num_acl_packets_sent >= num_packets){ 1625 conn->num_acl_packets_sent -= num_packets; 1626 } else { 1627 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1628 conn->num_acl_packets_sent = 0; 1629 } 1630 } 1631 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1632 } 1633 break; 1634 } 1635 1636 #ifdef ENABLE_CLASSIC 1637 case HCI_EVENT_CONNECTION_REQUEST: 1638 reverse_bd_addr(&packet[2], addr); 1639 // TODO: eval COD 8-10 1640 link_type = packet[11]; 1641 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1642 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1643 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1644 if (!conn) { 1645 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1646 } 1647 if (!conn) { 1648 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1649 hci_stack->decline_reason = 0x0d; 1650 bd_addr_copy(hci_stack->decline_addr, addr); 1651 break; 1652 } 1653 conn->role = HCI_ROLE_SLAVE; 1654 conn->state = RECEIVED_CONNECTION_REQUEST; 1655 // store info about eSCO 1656 if (link_type == 0x02){ 1657 conn->remote_supported_feature_eSCO = 1; 1658 } 1659 hci_run(); 1660 break; 1661 1662 case HCI_EVENT_CONNECTION_COMPLETE: 1663 // Connection management 1664 reverse_bd_addr(&packet[5], addr); 1665 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1666 addr_type = BD_ADDR_TYPE_CLASSIC; 1667 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1668 if (conn) { 1669 if (!packet[2]){ 1670 conn->state = OPEN; 1671 conn->con_handle = little_endian_read_16(packet, 3); 1672 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1673 1674 // restart timer 1675 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1676 btstack_run_loop_add_timer(&conn->timeout); 1677 1678 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1679 1680 hci_emit_nr_connections_changed(); 1681 } else { 1682 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1683 uint8_t status = packet[2]; 1684 bd_addr_t bd_address; 1685 memcpy(&bd_address, conn->address, 6); 1686 1687 // connection failed, remove entry 1688 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1689 btstack_memory_hci_connection_free( conn ); 1690 1691 // notify client if dedicated bonding 1692 if (notify_dedicated_bonding_failed){ 1693 log_info("hci notify_dedicated_bonding_failed"); 1694 hci_emit_dedicated_bonding_result(bd_address, status); 1695 } 1696 1697 // if authentication error, also delete link key 1698 if (packet[2] == 0x05) { 1699 gap_drop_link_key_for_bd_addr(addr); 1700 } 1701 } 1702 } 1703 break; 1704 1705 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1706 reverse_bd_addr(&packet[5], addr); 1707 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1708 if (packet[2]){ 1709 // connection failed 1710 break; 1711 } 1712 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1713 if (!conn) { 1714 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1715 } 1716 if (!conn) { 1717 break; 1718 } 1719 conn->state = OPEN; 1720 conn->con_handle = little_endian_read_16(packet, 3); 1721 break; 1722 1723 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1724 handle = little_endian_read_16(packet, 3); 1725 conn = hci_connection_for_handle(handle); 1726 if (!conn) break; 1727 if (!packet[2]){ 1728 uint8_t * features = &packet[5]; 1729 if (features[6] & (1 << 3)){ 1730 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1731 } 1732 if (features[3] & (1<<7)){ 1733 conn->remote_supported_feature_eSCO = 1; 1734 } 1735 } 1736 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1737 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1738 if (conn->bonding_flags & BONDING_DEDICATED){ 1739 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1740 } 1741 break; 1742 1743 case HCI_EVENT_LINK_KEY_REQUEST: 1744 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1745 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1746 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1747 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1748 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1749 hci_run(); 1750 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1751 return; 1752 1753 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1754 reverse_bd_addr(&packet[2], addr); 1755 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1756 if (!conn) break; 1757 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1758 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1759 // Change Connection Encryption keeps link key type 1760 if (link_key_type != CHANGED_COMBINATION_KEY){ 1761 conn->link_key_type = link_key_type; 1762 } 1763 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1764 // still forward event to allow dismiss of pairing dialog 1765 break; 1766 } 1767 1768 case HCI_EVENT_PIN_CODE_REQUEST: 1769 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1770 // non-bondable mode: pin code negative reply will be sent 1771 if (!hci_stack->bondable){ 1772 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1773 hci_run(); 1774 return; 1775 } 1776 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1777 if (!hci_stack->link_key_db) break; 1778 hci_event_pin_code_request_get_bd_addr(packet, addr); 1779 hci_stack->link_key_db->delete_link_key(addr); 1780 break; 1781 1782 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1783 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1784 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1785 break; 1786 1787 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1788 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1789 if (!hci_stack->ssp_auto_accept) break; 1790 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1791 break; 1792 1793 case HCI_EVENT_USER_PASSKEY_REQUEST: 1794 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1795 if (!hci_stack->ssp_auto_accept) break; 1796 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1797 break; 1798 #endif 1799 1800 case HCI_EVENT_ENCRYPTION_CHANGE: 1801 handle = little_endian_read_16(packet, 3); 1802 conn = hci_connection_for_handle(handle); 1803 if (!conn) break; 1804 if (packet[2] == 0) { 1805 if (packet[5]){ 1806 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1807 } else { 1808 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1809 } 1810 } 1811 #ifdef ENABLE_CLASSIC 1812 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1813 #endif 1814 break; 1815 1816 #ifdef ENABLE_CLASSIC 1817 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1818 handle = little_endian_read_16(packet, 3); 1819 conn = hci_connection_for_handle(handle); 1820 if (!conn) break; 1821 1822 // dedicated bonding: send result and disconnect 1823 if (conn->bonding_flags & BONDING_DEDICATED){ 1824 conn->bonding_flags &= ~BONDING_DEDICATED; 1825 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1826 conn->bonding_status = packet[2]; 1827 break; 1828 } 1829 1830 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1831 // link key sufficient for requested security 1832 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1833 break; 1834 } 1835 // not enough 1836 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1837 break; 1838 #endif 1839 1840 // HCI_EVENT_DISCONNECTION_COMPLETE 1841 // has been split, to first notify stack before shutting connection down 1842 // see end of function, too. 1843 case HCI_EVENT_DISCONNECTION_COMPLETE: 1844 if (packet[2]) break; // status != 0 1845 handle = little_endian_read_16(packet, 3); 1846 // drop outgoing ACL fragments if it is for closed connection 1847 if (hci_stack->acl_fragmentation_total_size > 0) { 1848 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1849 log_info("hci: drop fragmented ACL data for closed connection"); 1850 hci_stack->acl_fragmentation_total_size = 0; 1851 hci_stack->acl_fragmentation_pos = 0; 1852 } 1853 } 1854 1855 // re-enable advertisements for le connections if active 1856 conn = hci_connection_for_handle(handle); 1857 if (!conn) break; 1858 #ifdef ENABLE_BLE 1859 #ifdef ENABLE_LE_PERIPHERAL 1860 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1861 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1862 } 1863 #endif 1864 #endif 1865 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1866 break; 1867 1868 case HCI_EVENT_HARDWARE_ERROR: 1869 log_error("Hardware Error: 0x%02x", packet[2]); 1870 if (hci_stack->hardware_error_callback){ 1871 (*hci_stack->hardware_error_callback)(packet[2]); 1872 } else { 1873 // if no special requests, just reboot stack 1874 hci_power_control_off(); 1875 hci_power_control_on(); 1876 } 1877 break; 1878 1879 #ifdef ENABLE_CLASSIC 1880 case HCI_EVENT_ROLE_CHANGE: 1881 if (packet[2]) break; // status != 0 1882 handle = little_endian_read_16(packet, 3); 1883 conn = hci_connection_for_handle(handle); 1884 if (!conn) break; // no conn 1885 conn->role = packet[9]; 1886 break; 1887 #endif 1888 1889 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1890 // release packet buffer only for asynchronous transport and if there are not further fragements 1891 if (hci_transport_synchronous()) { 1892 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1893 return; // instead of break: to avoid re-entering hci_run() 1894 } 1895 if (hci_stack->acl_fragmentation_total_size) break; 1896 hci_release_packet_buffer(); 1897 1898 // L2CAP receives this event via the hci_emit_event below 1899 1900 #ifdef ENABLE_CLASSIC 1901 // For SCO, we do the can_send_now_check here 1902 hci_notify_if_sco_can_send_now(); 1903 #endif 1904 break; 1905 1906 #ifdef ENABLE_CLASSIC 1907 case HCI_EVENT_SCO_CAN_SEND_NOW: 1908 // For SCO, we do the can_send_now_check here 1909 hci_notify_if_sco_can_send_now(); 1910 return; 1911 #endif 1912 1913 #ifdef ENABLE_BLE 1914 case HCI_EVENT_LE_META: 1915 switch (packet[2]){ 1916 #ifdef ENABLE_LE_CENTRAL 1917 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1918 // log_info("advertising report received"); 1919 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1920 le_handle_advertisement_report(packet, size); 1921 break; 1922 #endif 1923 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1924 // Connection management 1925 reverse_bd_addr(&packet[8], addr); 1926 addr_type = (bd_addr_type_t)packet[7]; 1927 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1928 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1929 #ifdef ENABLE_LE_CENTRAL 1930 // if auto-connect, remove from whitelist in both roles 1931 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1932 hci_remove_from_whitelist(addr_type, addr); 1933 } 1934 // handle error: error is reported only to the initiator -> outgoing connection 1935 if (packet[3]){ 1936 // outgoing connection establishment is done 1937 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1938 // remove entry 1939 if (conn){ 1940 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1941 btstack_memory_hci_connection_free( conn ); 1942 } 1943 break; 1944 } 1945 #endif 1946 // on success, both hosts receive connection complete event 1947 if (packet[6] == HCI_ROLE_MASTER){ 1948 #ifdef ENABLE_LE_CENTRAL 1949 // if we're master, it was an outgoing connection and we're done with it 1950 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1951 #endif 1952 } else { 1953 #ifdef ENABLE_LE_PERIPHERAL 1954 // if we're slave, it was an incoming connection, advertisements have stopped 1955 hci_stack->le_advertisements_active = 0; 1956 // try to re-enable them 1957 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1958 #endif 1959 } 1960 // LE connections are auto-accepted, so just create a connection if there isn't one already 1961 if (!conn){ 1962 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1963 } 1964 // no memory, sorry. 1965 if (!conn){ 1966 break; 1967 } 1968 1969 conn->state = OPEN; 1970 conn->role = packet[6]; 1971 conn->con_handle = little_endian_read_16(packet, 4); 1972 1973 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1974 1975 // restart timer 1976 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1977 // btstack_run_loop_add_timer(&conn->timeout); 1978 1979 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1980 1981 hci_emit_nr_connections_changed(); 1982 break; 1983 1984 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1985 1986 default: 1987 break; 1988 } 1989 break; 1990 #endif 1991 default: 1992 break; 1993 } 1994 1995 // handle BT initialization 1996 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1997 hci_initializing_event_handler(packet, size); 1998 } 1999 2000 // help with BT sleep 2001 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2002 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2003 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2004 hci_initializing_next_state(); 2005 } 2006 2007 // notify upper stack 2008 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2009 2010 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2011 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2012 if (!packet[2]){ 2013 handle = little_endian_read_16(packet, 3); 2014 hci_connection_t * aConn = hci_connection_for_handle(handle); 2015 if (aConn) { 2016 uint8_t status = aConn->bonding_status; 2017 uint16_t flags = aConn->bonding_flags; 2018 bd_addr_t bd_address; 2019 memcpy(&bd_address, aConn->address, 6); 2020 hci_shutdown_connection(aConn); 2021 // connection struct is gone, don't access anymore 2022 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2023 hci_emit_dedicated_bonding_result(bd_address, status); 2024 } 2025 } 2026 } 2027 } 2028 2029 // execute main loop 2030 hci_run(); 2031 } 2032 2033 #ifdef ENABLE_CLASSIC 2034 static void sco_handler(uint8_t * packet, uint16_t size){ 2035 if (!hci_stack->sco_packet_handler) return; 2036 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2037 } 2038 #endif 2039 2040 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2041 hci_dump_packet(packet_type, 1, packet, size); 2042 switch (packet_type) { 2043 case HCI_EVENT_PACKET: 2044 event_handler(packet, size); 2045 break; 2046 case HCI_ACL_DATA_PACKET: 2047 acl_handler(packet, size); 2048 break; 2049 #ifdef ENABLE_CLASSIC 2050 case HCI_SCO_DATA_PACKET: 2051 sco_handler(packet, size); 2052 break; 2053 #endif 2054 default: 2055 break; 2056 } 2057 } 2058 2059 /** 2060 * @brief Add event packet handler. 2061 */ 2062 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2063 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2064 } 2065 2066 2067 /** Register HCI packet handlers */ 2068 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2069 hci_stack->acl_packet_handler = handler; 2070 } 2071 2072 #ifdef ENABLE_CLASSIC 2073 /** 2074 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2075 */ 2076 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2077 hci_stack->sco_packet_handler = handler; 2078 } 2079 #endif 2080 2081 static void hci_state_reset(void){ 2082 // no connections yet 2083 hci_stack->connections = NULL; 2084 2085 // keep discoverable/connectable as this has been requested by the client(s) 2086 // hci_stack->discoverable = 0; 2087 // hci_stack->connectable = 0; 2088 // hci_stack->bondable = 1; 2089 // hci_stack->own_addr_type = 0; 2090 2091 // buffer is free 2092 hci_stack->hci_packet_buffer_reserved = 0; 2093 2094 // no pending cmds 2095 hci_stack->decline_reason = 0; 2096 hci_stack->new_scan_enable_value = 0xff; 2097 2098 // LE 2099 #ifdef ENABLE_BLE 2100 memset(hci_stack->le_random_address, 0, 6); 2101 hci_stack->le_random_address_set = 0; 2102 #endif 2103 #ifdef ENABLE_LE_CENTRAL 2104 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2105 hci_stack->le_scan_type = 0xff; 2106 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2107 hci_stack->le_whitelist = 0; 2108 hci_stack->le_whitelist_capacity = 0; 2109 #endif 2110 2111 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2112 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2113 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2114 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2115 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2116 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2117 } 2118 2119 #ifdef ENABLE_CLASSIC 2120 /** 2121 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2122 */ 2123 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2124 // store and open remote device db 2125 hci_stack->link_key_db = link_key_db; 2126 if (hci_stack->link_key_db) { 2127 hci_stack->link_key_db->open(); 2128 } 2129 } 2130 #endif 2131 2132 void hci_init(const hci_transport_t *transport, const void *config){ 2133 2134 #ifdef HAVE_MALLOC 2135 if (!hci_stack) { 2136 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2137 } 2138 #else 2139 hci_stack = &hci_stack_static; 2140 #endif 2141 memset(hci_stack, 0, sizeof(hci_stack_t)); 2142 2143 // reference to use transport layer implementation 2144 hci_stack->hci_transport = transport; 2145 2146 // reference to used config 2147 hci_stack->config = config; 2148 2149 // setup pointer for outgoing packet buffer 2150 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2151 2152 // max acl payload size defined in config.h 2153 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2154 2155 // register packet handlers with transport 2156 transport->register_packet_handler(&packet_handler); 2157 2158 hci_stack->state = HCI_STATE_OFF; 2159 2160 // class of device 2161 hci_stack->class_of_device = 0x007a020c; // Smartphone 2162 2163 // bondable by default 2164 hci_stack->bondable = 1; 2165 2166 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2167 hci_stack->ssp_enable = 1; 2168 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2169 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2170 hci_stack->ssp_auto_accept = 1; 2171 2172 // voice setting - signed 8 bit pcm data with CVSD over the air 2173 hci_stack->sco_voice_setting = 0x40; 2174 2175 hci_state_reset(); 2176 } 2177 2178 /** 2179 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2180 */ 2181 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2182 hci_stack->chipset = chipset_driver; 2183 2184 // reset chipset driver - init is also called on power_up 2185 if (hci_stack->chipset && hci_stack->chipset->init){ 2186 hci_stack->chipset->init(hci_stack->config); 2187 } 2188 } 2189 2190 /** 2191 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2192 */ 2193 void hci_set_control(const btstack_control_t *hardware_control){ 2194 // references to used control implementation 2195 hci_stack->control = hardware_control; 2196 // init with transport config 2197 hardware_control->init(hci_stack->config); 2198 } 2199 2200 void hci_close(void){ 2201 // close remote device db 2202 if (hci_stack->link_key_db) { 2203 hci_stack->link_key_db->close(); 2204 } 2205 2206 btstack_linked_list_iterator_t lit; 2207 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2208 while (btstack_linked_list_iterator_has_next(&lit)){ 2209 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2210 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2211 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2212 hci_shutdown_connection(connection); 2213 } 2214 2215 hci_power_control(HCI_POWER_OFF); 2216 2217 #ifdef HAVE_MALLOC 2218 free(hci_stack); 2219 #endif 2220 hci_stack = NULL; 2221 } 2222 2223 #ifdef ENABLE_CLASSIC 2224 void gap_set_class_of_device(uint32_t class_of_device){ 2225 hci_stack->class_of_device = class_of_device; 2226 } 2227 2228 void hci_disable_l2cap_timeout_check(void){ 2229 disable_l2cap_timeouts = 1; 2230 } 2231 #endif 2232 2233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2234 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2235 void hci_set_bd_addr(bd_addr_t addr){ 2236 memcpy(hci_stack->custom_bd_addr, addr, 6); 2237 hci_stack->custom_bd_addr_set = 1; 2238 } 2239 #endif 2240 2241 // State-Module-Driver overview 2242 // state module low-level 2243 // HCI_STATE_OFF off close 2244 // HCI_STATE_INITIALIZING, on open 2245 // HCI_STATE_WORKING, on open 2246 // HCI_STATE_HALTING, on open 2247 // HCI_STATE_SLEEPING, off/sleep close 2248 // HCI_STATE_FALLING_ASLEEP on open 2249 2250 static int hci_power_control_on(void){ 2251 2252 // power on 2253 int err = 0; 2254 if (hci_stack->control && hci_stack->control->on){ 2255 err = (*hci_stack->control->on)(); 2256 } 2257 if (err){ 2258 log_error( "POWER_ON failed"); 2259 hci_emit_hci_open_failed(); 2260 return err; 2261 } 2262 2263 // int chipset driver 2264 if (hci_stack->chipset && hci_stack->chipset->init){ 2265 hci_stack->chipset->init(hci_stack->config); 2266 } 2267 2268 // init transport 2269 if (hci_stack->hci_transport->init){ 2270 hci_stack->hci_transport->init(hci_stack->config); 2271 } 2272 2273 // open transport 2274 err = hci_stack->hci_transport->open(); 2275 if (err){ 2276 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2277 if (hci_stack->control && hci_stack->control->off){ 2278 (*hci_stack->control->off)(); 2279 } 2280 hci_emit_hci_open_failed(); 2281 return err; 2282 } 2283 return 0; 2284 } 2285 2286 static void hci_power_control_off(void){ 2287 2288 log_info("hci_power_control_off"); 2289 2290 // close low-level device 2291 hci_stack->hci_transport->close(); 2292 2293 log_info("hci_power_control_off - hci_transport closed"); 2294 2295 // power off 2296 if (hci_stack->control && hci_stack->control->off){ 2297 (*hci_stack->control->off)(); 2298 } 2299 2300 log_info("hci_power_control_off - control closed"); 2301 2302 hci_stack->state = HCI_STATE_OFF; 2303 } 2304 2305 static void hci_power_control_sleep(void){ 2306 2307 log_info("hci_power_control_sleep"); 2308 2309 #if 0 2310 // don't close serial port during sleep 2311 2312 // close low-level device 2313 hci_stack->hci_transport->close(hci_stack->config); 2314 #endif 2315 2316 // sleep mode 2317 if (hci_stack->control && hci_stack->control->sleep){ 2318 (*hci_stack->control->sleep)(); 2319 } 2320 2321 hci_stack->state = HCI_STATE_SLEEPING; 2322 } 2323 2324 static int hci_power_control_wake(void){ 2325 2326 log_info("hci_power_control_wake"); 2327 2328 // wake on 2329 if (hci_stack->control && hci_stack->control->wake){ 2330 (*hci_stack->control->wake)(); 2331 } 2332 2333 #if 0 2334 // open low-level device 2335 int err = hci_stack->hci_transport->open(hci_stack->config); 2336 if (err){ 2337 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2338 if (hci_stack->control && hci_stack->control->off){ 2339 (*hci_stack->control->off)(); 2340 } 2341 hci_emit_hci_open_failed(); 2342 return err; 2343 } 2344 #endif 2345 2346 return 0; 2347 } 2348 2349 static void hci_power_transition_to_initializing(void){ 2350 // set up state machine 2351 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2352 hci_stack->hci_packet_buffer_reserved = 0; 2353 hci_stack->state = HCI_STATE_INITIALIZING; 2354 hci_stack->substate = HCI_INIT_SEND_RESET; 2355 } 2356 2357 int hci_power_control(HCI_POWER_MODE power_mode){ 2358 2359 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2360 2361 int err = 0; 2362 switch (hci_stack->state){ 2363 2364 case HCI_STATE_OFF: 2365 switch (power_mode){ 2366 case HCI_POWER_ON: 2367 err = hci_power_control_on(); 2368 if (err) { 2369 log_error("hci_power_control_on() error %d", err); 2370 return err; 2371 } 2372 hci_power_transition_to_initializing(); 2373 break; 2374 case HCI_POWER_OFF: 2375 // do nothing 2376 break; 2377 case HCI_POWER_SLEEP: 2378 // do nothing (with SLEEP == OFF) 2379 break; 2380 } 2381 break; 2382 2383 case HCI_STATE_INITIALIZING: 2384 switch (power_mode){ 2385 case HCI_POWER_ON: 2386 // do nothing 2387 break; 2388 case HCI_POWER_OFF: 2389 // no connections yet, just turn it off 2390 hci_power_control_off(); 2391 break; 2392 case HCI_POWER_SLEEP: 2393 // no connections yet, just turn it off 2394 hci_power_control_sleep(); 2395 break; 2396 } 2397 break; 2398 2399 case HCI_STATE_WORKING: 2400 switch (power_mode){ 2401 case HCI_POWER_ON: 2402 // do nothing 2403 break; 2404 case HCI_POWER_OFF: 2405 // see hci_run 2406 hci_stack->state = HCI_STATE_HALTING; 2407 break; 2408 case HCI_POWER_SLEEP: 2409 // see hci_run 2410 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2411 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2412 break; 2413 } 2414 break; 2415 2416 case HCI_STATE_HALTING: 2417 switch (power_mode){ 2418 case HCI_POWER_ON: 2419 hci_power_transition_to_initializing(); 2420 break; 2421 case HCI_POWER_OFF: 2422 // do nothing 2423 break; 2424 case HCI_POWER_SLEEP: 2425 // see hci_run 2426 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2427 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2428 break; 2429 } 2430 break; 2431 2432 case HCI_STATE_FALLING_ASLEEP: 2433 switch (power_mode){ 2434 case HCI_POWER_ON: 2435 2436 #ifdef HAVE_PLATFORM_IPHONE_OS 2437 // nothing to do, if H4 supports power management 2438 if (btstack_control_iphone_power_management_enabled()){ 2439 hci_stack->state = HCI_STATE_INITIALIZING; 2440 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2441 break; 2442 } 2443 #endif 2444 hci_power_transition_to_initializing(); 2445 break; 2446 case HCI_POWER_OFF: 2447 // see hci_run 2448 hci_stack->state = HCI_STATE_HALTING; 2449 break; 2450 case HCI_POWER_SLEEP: 2451 // do nothing 2452 break; 2453 } 2454 break; 2455 2456 case HCI_STATE_SLEEPING: 2457 switch (power_mode){ 2458 case HCI_POWER_ON: 2459 2460 #ifdef HAVE_PLATFORM_IPHONE_OS 2461 // nothing to do, if H4 supports power management 2462 if (btstack_control_iphone_power_management_enabled()){ 2463 hci_stack->state = HCI_STATE_INITIALIZING; 2464 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2465 hci_update_scan_enable(); 2466 break; 2467 } 2468 #endif 2469 err = hci_power_control_wake(); 2470 if (err) return err; 2471 hci_power_transition_to_initializing(); 2472 break; 2473 case HCI_POWER_OFF: 2474 hci_stack->state = HCI_STATE_HALTING; 2475 break; 2476 case HCI_POWER_SLEEP: 2477 // do nothing 2478 break; 2479 } 2480 break; 2481 } 2482 2483 // create internal event 2484 hci_emit_state(); 2485 2486 // trigger next/first action 2487 hci_run(); 2488 2489 return 0; 2490 } 2491 2492 2493 #ifdef ENABLE_CLASSIC 2494 2495 static void hci_update_scan_enable(void){ 2496 // 2 = page scan, 1 = inq scan 2497 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2498 hci_run(); 2499 } 2500 2501 void gap_discoverable_control(uint8_t enable){ 2502 if (enable) enable = 1; // normalize argument 2503 2504 if (hci_stack->discoverable == enable){ 2505 hci_emit_discoverable_enabled(hci_stack->discoverable); 2506 return; 2507 } 2508 2509 hci_stack->discoverable = enable; 2510 hci_update_scan_enable(); 2511 } 2512 2513 void gap_connectable_control(uint8_t enable){ 2514 if (enable) enable = 1; // normalize argument 2515 2516 // don't emit event 2517 if (hci_stack->connectable == enable) return; 2518 2519 hci_stack->connectable = enable; 2520 hci_update_scan_enable(); 2521 } 2522 #endif 2523 2524 void gap_local_bd_addr(bd_addr_t address_buffer){ 2525 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2526 } 2527 2528 static void hci_run(void){ 2529 2530 // log_info("hci_run: entered"); 2531 btstack_linked_item_t * it; 2532 2533 // send continuation fragments first, as they block the prepared packet buffer 2534 if (hci_stack->acl_fragmentation_total_size > 0) { 2535 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2536 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2537 if (connection) { 2538 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2539 hci_send_acl_packet_fragments(connection); 2540 return; 2541 } 2542 } else { 2543 // connection gone -> discard further fragments 2544 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2545 hci_stack->acl_fragmentation_total_size = 0; 2546 hci_stack->acl_fragmentation_pos = 0; 2547 } 2548 } 2549 2550 if (!hci_can_send_command_packet_now()) return; 2551 2552 // global/non-connection oriented commands 2553 2554 #ifdef ENABLE_CLASSIC 2555 // decline incoming connections 2556 if (hci_stack->decline_reason){ 2557 uint8_t reason = hci_stack->decline_reason; 2558 hci_stack->decline_reason = 0; 2559 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2560 return; 2561 } 2562 2563 // send scan enable 2564 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2565 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2566 hci_stack->new_scan_enable_value = 0xff; 2567 return; 2568 } 2569 #endif 2570 2571 #ifdef ENABLE_BLE 2572 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2573 if ((hci_stack->state == HCI_STATE_WORKING) 2574 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2575 2576 #ifdef ENABLE_LE_CENTRAL 2577 // handle le scan 2578 switch(hci_stack->le_scanning_state){ 2579 case LE_START_SCAN: 2580 hci_stack->le_scanning_state = LE_SCANNING; 2581 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2582 return; 2583 2584 case LE_STOP_SCAN: 2585 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2586 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2587 return; 2588 default: 2589 break; 2590 } 2591 if (hci_stack->le_scan_type != 0xff){ 2592 // defaults: active scanning, accept all advertisement packets 2593 int scan_type = hci_stack->le_scan_type; 2594 hci_stack->le_scan_type = 0xff; 2595 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 2596 return; 2597 } 2598 #endif 2599 #ifdef ENABLE_LE_PERIPHERAL 2600 // le advertisement control 2601 if (hci_stack->le_advertisements_todo){ 2602 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2603 } 2604 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2605 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2606 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2607 return; 2608 } 2609 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2610 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2611 hci_send_cmd(&hci_le_set_advertising_parameters, 2612 hci_stack->le_advertisements_interval_min, 2613 hci_stack->le_advertisements_interval_max, 2614 hci_stack->le_advertisements_type, 2615 hci_stack->le_own_addr_type, 2616 hci_stack->le_advertisements_direct_address_type, 2617 hci_stack->le_advertisements_direct_address, 2618 hci_stack->le_advertisements_channel_map, 2619 hci_stack->le_advertisements_filter_policy); 2620 return; 2621 } 2622 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2623 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2624 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2625 return; 2626 } 2627 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2628 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2629 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2630 hci_stack->le_scan_response_data); 2631 return; 2632 } 2633 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2634 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2635 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2636 return; 2637 } 2638 #endif 2639 2640 #ifdef ENABLE_LE_CENTRAL 2641 // 2642 // LE Whitelist Management 2643 // 2644 2645 // check if whitelist needs modification 2646 btstack_linked_list_iterator_t lit; 2647 int modification_pending = 0; 2648 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2649 while (btstack_linked_list_iterator_has_next(&lit)){ 2650 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2651 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2652 modification_pending = 1; 2653 break; 2654 } 2655 } 2656 2657 if (modification_pending){ 2658 // stop connnecting if modification pending 2659 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2660 hci_send_cmd(&hci_le_create_connection_cancel); 2661 return; 2662 } 2663 2664 // add/remove entries 2665 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2666 while (btstack_linked_list_iterator_has_next(&lit)){ 2667 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2668 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2669 entry->state = LE_WHITELIST_ON_CONTROLLER; 2670 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2671 return; 2672 2673 } 2674 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2675 bd_addr_t address; 2676 bd_addr_type_t address_type = entry->address_type; 2677 memcpy(address, entry->address, 6); 2678 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2679 btstack_memory_whitelist_entry_free(entry); 2680 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2681 return; 2682 } 2683 } 2684 } 2685 2686 // start connecting 2687 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2688 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2689 bd_addr_t null_addr; 2690 memset(null_addr, 0, 6); 2691 hci_send_cmd(&hci_le_create_connection, 2692 0x0060, // scan interval: 60 ms 2693 0x0030, // scan interval: 30 ms 2694 1, // use whitelist 2695 0, // peer address type 2696 null_addr, // peer bd addr 2697 hci_stack->le_own_addr_type, // our addr type: 2698 0x0008, // conn interval min 2699 0x0018, // conn interval max 2700 0, // conn latency 2701 0x0048, // supervision timeout 2702 0x0001, // min ce length 2703 0x0001 // max ce length 2704 ); 2705 return; 2706 } 2707 #endif 2708 } 2709 #endif 2710 2711 // send pending HCI commands 2712 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2713 hci_connection_t * connection = (hci_connection_t *) it; 2714 2715 switch(connection->state){ 2716 case SEND_CREATE_CONNECTION: 2717 switch(connection->address_type){ 2718 #ifdef ENABLE_CLASSIC 2719 case BD_ADDR_TYPE_CLASSIC: 2720 log_info("sending hci_create_connection"); 2721 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2722 break; 2723 #endif 2724 default: 2725 #ifdef ENABLE_BLE 2726 #ifdef ENABLE_LE_CENTRAL 2727 log_info("sending hci_le_create_connection"); 2728 hci_send_cmd(&hci_le_create_connection, 2729 0x0060, // scan interval: 60 ms 2730 0x0030, // scan interval: 30 ms 2731 0, // don't use whitelist 2732 connection->address_type, // peer address type 2733 connection->address, // peer bd addr 2734 hci_stack->le_own_addr_type, // our addr type: 2735 0x0008, // conn interval min 2736 0x0018, // conn interval max 2737 0, // conn latency 2738 0x0048, // supervision timeout 2739 0x0001, // min ce length 2740 0x0001 // max ce length 2741 ); 2742 2743 connection->state = SENT_CREATE_CONNECTION; 2744 #endif 2745 #endif 2746 break; 2747 } 2748 return; 2749 2750 #ifdef ENABLE_CLASSIC 2751 case RECEIVED_CONNECTION_REQUEST: 2752 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2753 connection->state = ACCEPTED_CONNECTION_REQUEST; 2754 connection->role = HCI_ROLE_SLAVE; 2755 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2756 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2757 } 2758 return; 2759 #endif 2760 2761 #ifdef ENABLE_BLE 2762 #ifdef ENABLE_LE_CENTRAL 2763 case SEND_CANCEL_CONNECTION: 2764 connection->state = SENT_CANCEL_CONNECTION; 2765 hci_send_cmd(&hci_le_create_connection_cancel); 2766 return; 2767 #endif 2768 #endif 2769 case SEND_DISCONNECT: 2770 connection->state = SENT_DISCONNECT; 2771 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2772 return; 2773 2774 default: 2775 break; 2776 } 2777 2778 #ifdef ENABLE_CLASSIC 2779 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2780 log_info("responding to link key request"); 2781 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2782 link_key_t link_key; 2783 link_key_type_t link_key_type; 2784 if ( hci_stack->link_key_db 2785 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2786 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2787 connection->link_key_type = link_key_type; 2788 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2789 } else { 2790 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2791 } 2792 return; 2793 } 2794 2795 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2796 log_info("denying to pin request"); 2797 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2798 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2799 return; 2800 } 2801 2802 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2803 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2804 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2805 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2806 // tweak authentication requirements 2807 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2808 if (connection->bonding_flags & BONDING_DEDICATED){ 2809 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2810 } 2811 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2812 authreq |= 1; 2813 } 2814 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2815 } else { 2816 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2817 } 2818 return; 2819 } 2820 2821 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2822 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2823 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2824 return; 2825 } 2826 2827 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2828 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2829 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2830 return; 2831 } 2832 2833 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2834 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2835 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2836 return; 2837 } 2838 2839 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2840 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2841 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2842 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2843 return; 2844 } 2845 2846 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2847 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2848 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2849 return; 2850 } 2851 2852 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2853 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2854 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2855 return; 2856 } 2857 #endif 2858 2859 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2860 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2861 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2862 return; 2863 } 2864 2865 #ifdef ENABLE_BLE 2866 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2867 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2868 2869 uint16_t connection_interval_min = connection->le_conn_interval_min; 2870 connection->le_conn_interval_min = 0; 2871 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2872 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2873 0x0000, 0xffff); 2874 } 2875 #endif 2876 } 2877 2878 hci_connection_t * connection; 2879 switch (hci_stack->state){ 2880 case HCI_STATE_INITIALIZING: 2881 hci_initializing_run(); 2882 break; 2883 2884 case HCI_STATE_HALTING: 2885 2886 log_info("HCI_STATE_HALTING"); 2887 2888 // free whitelist entries 2889 #ifdef ENABLE_BLE 2890 #ifdef ENABLE_LE_CENTRAL 2891 { 2892 btstack_linked_list_iterator_t lit; 2893 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2894 while (btstack_linked_list_iterator_has_next(&lit)){ 2895 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2896 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2897 btstack_memory_whitelist_entry_free(entry); 2898 } 2899 } 2900 #endif 2901 #endif 2902 // close all open connections 2903 connection = (hci_connection_t *) hci_stack->connections; 2904 if (connection){ 2905 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2906 if (!hci_can_send_command_packet_now()) return; 2907 2908 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2909 2910 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2911 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2912 2913 // ... which would be ignored anyway as we shutdown (free) the connection now 2914 hci_shutdown_connection(connection); 2915 2916 // finally, send the disconnect command 2917 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2918 return; 2919 } 2920 log_info("HCI_STATE_HALTING, calling off"); 2921 2922 // switch mode 2923 hci_power_control_off(); 2924 2925 log_info("HCI_STATE_HALTING, emitting state"); 2926 hci_emit_state(); 2927 log_info("HCI_STATE_HALTING, done"); 2928 break; 2929 2930 case HCI_STATE_FALLING_ASLEEP: 2931 switch(hci_stack->substate) { 2932 case HCI_FALLING_ASLEEP_DISCONNECT: 2933 log_info("HCI_STATE_FALLING_ASLEEP"); 2934 // close all open connections 2935 connection = (hci_connection_t *) hci_stack->connections; 2936 2937 #ifdef HAVE_PLATFORM_IPHONE_OS 2938 // don't close connections, if H4 supports power management 2939 if (btstack_control_iphone_power_management_enabled()){ 2940 connection = NULL; 2941 } 2942 #endif 2943 if (connection){ 2944 2945 // send disconnect 2946 if (!hci_can_send_command_packet_now()) return; 2947 2948 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2949 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2950 2951 // send disconnected event right away - causes higher layer connections to get closed, too. 2952 hci_shutdown_connection(connection); 2953 return; 2954 } 2955 2956 if (hci_classic_supported()){ 2957 // disable page and inquiry scan 2958 if (!hci_can_send_command_packet_now()) return; 2959 2960 log_info("HCI_STATE_HALTING, disabling inq scans"); 2961 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2962 2963 // continue in next sub state 2964 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2965 break; 2966 } 2967 // no break - fall through for ble-only chips 2968 2969 case HCI_FALLING_ASLEEP_COMPLETE: 2970 log_info("HCI_STATE_HALTING, calling sleep"); 2971 #ifdef HAVE_PLATFORM_IPHONE_OS 2972 // don't actually go to sleep, if H4 supports power management 2973 if (btstack_control_iphone_power_management_enabled()){ 2974 // SLEEP MODE reached 2975 hci_stack->state = HCI_STATE_SLEEPING; 2976 hci_emit_state(); 2977 break; 2978 } 2979 #endif 2980 // switch mode 2981 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2982 hci_emit_state(); 2983 break; 2984 2985 default: 2986 break; 2987 } 2988 break; 2989 2990 default: 2991 break; 2992 } 2993 } 2994 2995 int hci_send_cmd_packet(uint8_t *packet, int size){ 2996 // house-keeping 2997 2998 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2999 hci_stack->loopback_mode = packet[3]; 3000 } 3001 3002 #ifdef ENABLE_CLASSIC 3003 bd_addr_t addr; 3004 hci_connection_t * conn; 3005 3006 // create_connection? 3007 if (IS_COMMAND(packet, hci_create_connection)){ 3008 reverse_bd_addr(&packet[3], addr); 3009 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3010 3011 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3012 if (!conn){ 3013 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3014 if (!conn){ 3015 // notify client that alloc failed 3016 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3017 return 0; // don't sent packet to controller 3018 } 3019 conn->state = SEND_CREATE_CONNECTION; 3020 } 3021 log_info("conn state %u", conn->state); 3022 switch (conn->state){ 3023 // if connection active exists 3024 case OPEN: 3025 // and OPEN, emit connection complete command, don't send to controller 3026 hci_emit_connection_complete(addr, conn->con_handle, 0); 3027 return 0; 3028 case SEND_CREATE_CONNECTION: 3029 // connection created by hci, e.g. dedicated bonding 3030 break; 3031 default: 3032 // otherwise, just ignore as it is already in the open process 3033 return 0; 3034 } 3035 conn->state = SENT_CREATE_CONNECTION; 3036 } 3037 3038 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3039 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3040 } 3041 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3042 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3043 } 3044 3045 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3046 if (hci_stack->link_key_db){ 3047 reverse_bd_addr(&packet[3], addr); 3048 hci_stack->link_key_db->delete_link_key(addr); 3049 } 3050 } 3051 3052 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3053 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3054 reverse_bd_addr(&packet[3], addr); 3055 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3056 if (conn){ 3057 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3058 } 3059 } 3060 3061 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3062 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3063 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3064 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3065 reverse_bd_addr(&packet[3], addr); 3066 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3067 if (conn){ 3068 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3069 } 3070 } 3071 #endif 3072 3073 #ifdef ENABLE_BLE 3074 #ifdef ENABLE_LE_PERIPHERAL 3075 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3076 hci_stack->le_random_address_set = 1; 3077 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3078 } 3079 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3080 hci_stack->le_advertisements_active = packet[3]; 3081 } 3082 #endif 3083 #ifdef ENABLE_LE_CENTRAL 3084 if (IS_COMMAND(packet, hci_le_create_connection)){ 3085 // white list used? 3086 uint8_t initiator_filter_policy = packet[7]; 3087 switch (initiator_filter_policy){ 3088 case 0: 3089 // whitelist not used 3090 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3091 break; 3092 case 1: 3093 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3094 break; 3095 default: 3096 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3097 break; 3098 } 3099 } 3100 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3101 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3102 } 3103 #endif 3104 #endif 3105 3106 hci_stack->num_cmd_packets--; 3107 3108 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3109 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3110 3111 // release packet buffer for synchronous transport implementations 3112 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3113 hci_stack->hci_packet_buffer_reserved = 0; 3114 } 3115 3116 return err; 3117 } 3118 3119 // disconnect because of security block 3120 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3121 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3122 if (!connection) return; 3123 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3124 } 3125 3126 3127 // Configure Secure Simple Pairing 3128 3129 #ifdef ENABLE_CLASSIC 3130 3131 // enable will enable SSP during init 3132 void gap_ssp_set_enable(int enable){ 3133 hci_stack->ssp_enable = enable; 3134 } 3135 3136 static int hci_local_ssp_activated(void){ 3137 return gap_ssp_supported() && hci_stack->ssp_enable; 3138 } 3139 3140 // if set, BTstack will respond to io capability request using authentication requirement 3141 void gap_ssp_set_io_capability(int io_capability){ 3142 hci_stack->ssp_io_capability = io_capability; 3143 } 3144 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3145 hci_stack->ssp_authentication_requirement = authentication_requirement; 3146 } 3147 3148 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3149 void gap_ssp_set_auto_accept(int auto_accept){ 3150 hci_stack->ssp_auto_accept = auto_accept; 3151 } 3152 #endif 3153 3154 // va_list part of hci_send_cmd 3155 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3156 if (!hci_can_send_command_packet_now()){ 3157 log_error("hci_send_cmd called but cannot send packet now"); 3158 return 0; 3159 } 3160 3161 // for HCI INITIALIZATION 3162 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3163 hci_stack->last_cmd_opcode = cmd->opcode; 3164 3165 hci_reserve_packet_buffer(); 3166 uint8_t * packet = hci_stack->hci_packet_buffer; 3167 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3168 return hci_send_cmd_packet(packet, size); 3169 } 3170 3171 /** 3172 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3173 */ 3174 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3175 va_list argptr; 3176 va_start(argptr, cmd); 3177 int res = hci_send_cmd_va_arg(cmd, argptr); 3178 va_end(argptr); 3179 return res; 3180 } 3181 3182 // Create various non-HCI events. 3183 // TODO: generalize, use table similar to hci_create_command 3184 3185 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3186 // dump packet 3187 if (dump) { 3188 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3189 } 3190 3191 // dispatch to all event handlers 3192 btstack_linked_list_iterator_t it; 3193 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3194 while (btstack_linked_list_iterator_has_next(&it)){ 3195 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3196 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3197 } 3198 } 3199 3200 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3201 if (!hci_stack->acl_packet_handler) return; 3202 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3203 } 3204 3205 #ifdef ENABLE_CLASSIC 3206 static void hci_notify_if_sco_can_send_now(void){ 3207 // notify SCO sender if waiting 3208 if (!hci_stack->sco_waiting_for_can_send_now) return; 3209 if (hci_can_send_sco_packet_now()){ 3210 hci_stack->sco_waiting_for_can_send_now = 0; 3211 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3212 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3213 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3214 } 3215 } 3216 #endif 3217 3218 void hci_emit_state(void){ 3219 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3220 uint8_t event[3]; 3221 event[0] = BTSTACK_EVENT_STATE; 3222 event[1] = sizeof(event) - 2; 3223 event[2] = hci_stack->state; 3224 hci_emit_event(event, sizeof(event), 1); 3225 } 3226 3227 #ifdef ENABLE_CLASSIC 3228 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3229 uint8_t event[13]; 3230 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3231 event[1] = sizeof(event) - 2; 3232 event[2] = status; 3233 little_endian_store_16(event, 3, con_handle); 3234 reverse_bd_addr(address, &event[5]); 3235 event[11] = 1; // ACL connection 3236 event[12] = 0; // encryption disabled 3237 hci_emit_event(event, sizeof(event), 1); 3238 } 3239 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3240 if (disable_l2cap_timeouts) return; 3241 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3242 uint8_t event[4]; 3243 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3244 event[1] = sizeof(event) - 2; 3245 little_endian_store_16(event, 2, conn->con_handle); 3246 hci_emit_event(event, sizeof(event), 1); 3247 } 3248 #endif 3249 3250 #ifdef ENABLE_BLE 3251 #ifdef ENABLE_LE_CENTRAL 3252 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3253 uint8_t event[21]; 3254 event[0] = HCI_EVENT_LE_META; 3255 event[1] = sizeof(event) - 2; 3256 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3257 event[3] = status; 3258 little_endian_store_16(event, 4, con_handle); 3259 event[6] = 0; // TODO: role 3260 event[7] = address_type; 3261 reverse_bd_addr(address, &event[8]); 3262 little_endian_store_16(event, 14, 0); // interval 3263 little_endian_store_16(event, 16, 0); // latency 3264 little_endian_store_16(event, 18, 0); // supervision timeout 3265 event[20] = 0; // master clock accuracy 3266 hci_emit_event(event, sizeof(event), 1); 3267 } 3268 #endif 3269 #endif 3270 3271 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3272 uint8_t event[6]; 3273 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3274 event[1] = sizeof(event) - 2; 3275 event[2] = 0; // status = OK 3276 little_endian_store_16(event, 3, con_handle); 3277 event[5] = reason; 3278 hci_emit_event(event, sizeof(event), 1); 3279 } 3280 3281 static void hci_emit_nr_connections_changed(void){ 3282 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3283 uint8_t event[3]; 3284 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3285 event[1] = sizeof(event) - 2; 3286 event[2] = nr_hci_connections(); 3287 hci_emit_event(event, sizeof(event), 1); 3288 } 3289 3290 static void hci_emit_hci_open_failed(void){ 3291 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3292 uint8_t event[2]; 3293 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3294 event[1] = sizeof(event) - 2; 3295 hci_emit_event(event, sizeof(event), 1); 3296 } 3297 3298 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3299 log_info("hci_emit_dedicated_bonding_result %u ", status); 3300 uint8_t event[9]; 3301 int pos = 0; 3302 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3303 event[pos++] = sizeof(event) - 2; 3304 event[pos++] = status; 3305 reverse_bd_addr(address, &event[pos]); 3306 hci_emit_event(event, sizeof(event), 1); 3307 } 3308 3309 3310 #ifdef ENABLE_CLASSIC 3311 3312 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3313 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3314 uint8_t event[5]; 3315 int pos = 0; 3316 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3317 event[pos++] = sizeof(event) - 2; 3318 little_endian_store_16(event, 2, con_handle); 3319 pos += 2; 3320 event[pos++] = level; 3321 hci_emit_event(event, sizeof(event), 1); 3322 } 3323 3324 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3325 if (!connection) return LEVEL_0; 3326 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3327 return gap_security_level_for_link_key_type(connection->link_key_type); 3328 } 3329 3330 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3331 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3332 uint8_t event[3]; 3333 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3334 event[1] = sizeof(event) - 2; 3335 event[2] = enabled; 3336 hci_emit_event(event, sizeof(event), 1); 3337 } 3338 3339 #ifdef ENABLE_CLASSIC 3340 // query if remote side supports eSCO 3341 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3342 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3343 if (!connection) return 0; 3344 return connection->remote_supported_feature_eSCO; 3345 } 3346 3347 // query if remote side supports SSP 3348 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3349 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3350 if (!connection) return 0; 3351 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3352 } 3353 3354 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3355 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3356 } 3357 #endif 3358 3359 // GAP API 3360 /** 3361 * @bbrief enable/disable bonding. default is enabled 3362 * @praram enabled 3363 */ 3364 void gap_set_bondable_mode(int enable){ 3365 hci_stack->bondable = enable ? 1 : 0; 3366 } 3367 /** 3368 * @brief Get bondable mode. 3369 * @return 1 if bondable 3370 */ 3371 int gap_get_bondable_mode(void){ 3372 return hci_stack->bondable; 3373 } 3374 3375 /** 3376 * @brief map link keys to security levels 3377 */ 3378 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3379 switch (link_key_type){ 3380 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3381 return LEVEL_4; 3382 case COMBINATION_KEY: 3383 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3384 return LEVEL_3; 3385 default: 3386 return LEVEL_2; 3387 } 3388 } 3389 3390 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3391 log_info("gap_mitm_protection_required_for_security_level %u", level); 3392 return level > LEVEL_2; 3393 } 3394 3395 /** 3396 * @brief get current security level 3397 */ 3398 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3399 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3400 if (!connection) return LEVEL_0; 3401 return gap_security_level_for_connection(connection); 3402 } 3403 3404 /** 3405 * @brief request connection to device to 3406 * @result GAP_AUTHENTICATION_RESULT 3407 */ 3408 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3409 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3410 if (!connection){ 3411 hci_emit_security_level(con_handle, LEVEL_0); 3412 return; 3413 } 3414 gap_security_level_t current_level = gap_security_level(con_handle); 3415 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3416 if (current_level >= requested_level){ 3417 hci_emit_security_level(con_handle, current_level); 3418 return; 3419 } 3420 3421 connection->requested_security_level = requested_level; 3422 3423 #if 0 3424 // sending encryption request without a link key results in an error. 3425 // TODO: figure out how to use it properly 3426 3427 // would enabling ecnryption suffice (>= LEVEL_2)? 3428 if (hci_stack->link_key_db){ 3429 link_key_type_t link_key_type; 3430 link_key_t link_key; 3431 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3432 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3433 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3434 return; 3435 } 3436 } 3437 } 3438 #endif 3439 3440 // try to authenticate connection 3441 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3442 hci_run(); 3443 } 3444 3445 /** 3446 * @brief start dedicated bonding with device. disconnect after bonding 3447 * @param device 3448 * @param request MITM protection 3449 * @result GAP_DEDICATED_BONDING_COMPLETE 3450 */ 3451 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3452 3453 // create connection state machine 3454 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3455 3456 if (!connection){ 3457 return BTSTACK_MEMORY_ALLOC_FAILED; 3458 } 3459 3460 // delete linkn key 3461 gap_drop_link_key_for_bd_addr(device); 3462 3463 // configure LEVEL_2/3, dedicated bonding 3464 connection->state = SEND_CREATE_CONNECTION; 3465 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3466 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3467 connection->bonding_flags = BONDING_DEDICATED; 3468 3469 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3470 3471 // handle: connnection failure (connection complete != ok) 3472 // handle: authentication failure 3473 // handle: disconnect on done 3474 3475 hci_run(); 3476 3477 return 0; 3478 } 3479 #endif 3480 3481 void gap_set_local_name(const char * local_name){ 3482 hci_stack->local_name = local_name; 3483 } 3484 3485 3486 #ifdef ENABLE_BLE 3487 3488 #ifdef ENABLE_LE_CENTRAL 3489 void gap_start_scan(void){ 3490 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3491 hci_stack->le_scanning_state = LE_START_SCAN; 3492 hci_run(); 3493 } 3494 3495 void gap_stop_scan(void){ 3496 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3497 hci_stack->le_scanning_state = LE_STOP_SCAN; 3498 hci_run(); 3499 } 3500 3501 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3502 hci_stack->le_scan_type = scan_type; 3503 hci_stack->le_scan_interval = scan_interval; 3504 hci_stack->le_scan_window = scan_window; 3505 hci_run(); 3506 } 3507 3508 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3509 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3510 if (!conn){ 3511 log_info("gap_connect: no connection exists yet, creating context"); 3512 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3513 if (!conn){ 3514 // notify client that alloc failed 3515 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3516 log_info("gap_connect: failed to alloc hci_connection_t"); 3517 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3518 } 3519 conn->state = SEND_CREATE_CONNECTION; 3520 log_info("gap_connect: send create connection next"); 3521 hci_run(); 3522 return 0; 3523 } 3524 3525 if (!hci_is_le_connection(conn) || 3526 conn->state == SEND_CREATE_CONNECTION || 3527 conn->state == SENT_CREATE_CONNECTION) { 3528 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3529 log_error("gap_connect: classic connection or connect is already being created"); 3530 return GATT_CLIENT_IN_WRONG_STATE; 3531 } 3532 3533 log_info("gap_connect: context exists with state %u", conn->state); 3534 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3535 hci_run(); 3536 return 0; 3537 } 3538 3539 // @assumption: only a single outgoing LE Connection exists 3540 static hci_connection_t * gap_get_outgoing_connection(void){ 3541 btstack_linked_item_t *it; 3542 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3543 hci_connection_t * conn = (hci_connection_t *) it; 3544 if (!hci_is_le_connection(conn)) continue; 3545 switch (conn->state){ 3546 case SEND_CREATE_CONNECTION: 3547 case SENT_CREATE_CONNECTION: 3548 return conn; 3549 default: 3550 break; 3551 }; 3552 } 3553 return NULL; 3554 } 3555 3556 uint8_t gap_connect_cancel(void){ 3557 hci_connection_t * conn = gap_get_outgoing_connection(); 3558 if (!conn) return 0; 3559 switch (conn->state){ 3560 case SEND_CREATE_CONNECTION: 3561 // skip sending create connection and emit event instead 3562 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3563 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3564 btstack_memory_hci_connection_free( conn ); 3565 break; 3566 case SENT_CREATE_CONNECTION: 3567 // request to send cancel connection 3568 conn->state = SEND_CANCEL_CONNECTION; 3569 hci_run(); 3570 break; 3571 default: 3572 break; 3573 } 3574 return 0; 3575 } 3576 #endif 3577 3578 /** 3579 * @brief Updates the connection parameters for a given LE connection 3580 * @param handle 3581 * @param conn_interval_min (unit: 1.25ms) 3582 * @param conn_interval_max (unit: 1.25ms) 3583 * @param conn_latency 3584 * @param supervision_timeout (unit: 10ms) 3585 * @returns 0 if ok 3586 */ 3587 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3588 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3589 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3590 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3591 connection->le_conn_interval_min = conn_interval_min; 3592 connection->le_conn_interval_max = conn_interval_max; 3593 connection->le_conn_latency = conn_latency; 3594 connection->le_supervision_timeout = supervision_timeout; 3595 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3596 hci_run(); 3597 return 0; 3598 } 3599 3600 /** 3601 * @brief Request an update of the connection parameter for a given LE connection 3602 * @param handle 3603 * @param conn_interval_min (unit: 1.25ms) 3604 * @param conn_interval_max (unit: 1.25ms) 3605 * @param conn_latency 3606 * @param supervision_timeout (unit: 10ms) 3607 * @returns 0 if ok 3608 */ 3609 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3610 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3611 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3612 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3613 connection->le_conn_interval_min = conn_interval_min; 3614 connection->le_conn_interval_max = conn_interval_max; 3615 connection->le_conn_latency = conn_latency; 3616 connection->le_supervision_timeout = supervision_timeout; 3617 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3618 hci_run(); 3619 return 0; 3620 } 3621 3622 #ifdef ENABLE_LE_PERIPHERAL 3623 3624 static void gap_advertisments_changed(void){ 3625 // disable advertisements before updating adv, scan data, or adv params 3626 if (hci_stack->le_advertisements_active){ 3627 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3628 } 3629 hci_run(); 3630 } 3631 3632 /** 3633 * @brief Set Advertisement Data 3634 * @param advertising_data_length 3635 * @param advertising_data (max 31 octets) 3636 * @note data is not copied, pointer has to stay valid 3637 */ 3638 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3639 hci_stack->le_advertisements_data_len = advertising_data_length; 3640 hci_stack->le_advertisements_data = advertising_data; 3641 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3642 gap_advertisments_changed(); 3643 } 3644 3645 /** 3646 * @brief Set Scan Response Data 3647 * @param advertising_data_length 3648 * @param advertising_data (max 31 octets) 3649 * @note data is not copied, pointer has to stay valid 3650 */ 3651 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3652 hci_stack->le_scan_response_data_len = scan_response_data_length; 3653 hci_stack->le_scan_response_data = scan_response_data; 3654 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3655 gap_advertisments_changed(); 3656 } 3657 3658 /** 3659 * @brief Set Advertisement Parameters 3660 * @param adv_int_min 3661 * @param adv_int_max 3662 * @param adv_type 3663 * @param direct_address_type 3664 * @param direct_address 3665 * @param channel_map 3666 * @param filter_policy 3667 * 3668 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3669 */ 3670 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3671 uint8_t direct_address_typ, bd_addr_t direct_address, 3672 uint8_t channel_map, uint8_t filter_policy) { 3673 3674 hci_stack->le_advertisements_interval_min = adv_int_min; 3675 hci_stack->le_advertisements_interval_max = adv_int_max; 3676 hci_stack->le_advertisements_type = adv_type; 3677 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3678 hci_stack->le_advertisements_channel_map = channel_map; 3679 hci_stack->le_advertisements_filter_policy = filter_policy; 3680 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3681 3682 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3683 gap_advertisments_changed(); 3684 } 3685 3686 void hci_le_set_own_address_type(uint8_t own_address_type){ 3687 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3688 if (own_address_type == hci_stack->le_own_addr_type) return; 3689 hci_stack->le_own_addr_type = own_address_type; 3690 3691 // update advertisement parameters, too 3692 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3693 gap_advertisments_changed(); 3694 // note: we don't update scan parameters or modify ongoing connection attempts 3695 } 3696 3697 /** 3698 * @brief Enable/Disable Advertisements 3699 * @param enabled 3700 */ 3701 void gap_advertisements_enable(int enabled){ 3702 hci_stack->le_advertisements_enabled = enabled; 3703 if (enabled && !hci_stack->le_advertisements_active){ 3704 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3705 } 3706 if (!enabled && hci_stack->le_advertisements_active){ 3707 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3708 } 3709 hci_run(); 3710 } 3711 3712 #endif 3713 #endif 3714 3715 uint8_t gap_disconnect(hci_con_handle_t handle){ 3716 hci_connection_t * conn = hci_connection_for_handle(handle); 3717 if (!conn){ 3718 hci_emit_disconnection_complete(handle, 0); 3719 return 0; 3720 } 3721 conn->state = SEND_DISCONNECT; 3722 hci_run(); 3723 return 0; 3724 } 3725 3726 /** 3727 * @brief Get connection type 3728 * @param con_handle 3729 * @result connection_type 3730 */ 3731 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3732 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3733 if (!conn) return GAP_CONNECTION_INVALID; 3734 switch (conn->address_type){ 3735 case BD_ADDR_TYPE_LE_PUBLIC: 3736 case BD_ADDR_TYPE_LE_RANDOM: 3737 return GAP_CONNECTION_LE; 3738 case BD_ADDR_TYPE_SCO: 3739 return GAP_CONNECTION_SCO; 3740 case BD_ADDR_TYPE_CLASSIC: 3741 return GAP_CONNECTION_ACL; 3742 default: 3743 return GAP_CONNECTION_INVALID; 3744 } 3745 } 3746 3747 #ifdef ENABLE_BLE 3748 3749 #ifdef ENABLE_LE_CENTRAL 3750 /** 3751 * @brief Auto Connection Establishment - Start Connecting to device 3752 * @param address_typ 3753 * @param address 3754 * @returns 0 if ok 3755 */ 3756 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3757 // check capacity 3758 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3759 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3760 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3761 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3762 entry->address_type = address_type; 3763 memcpy(entry->address, address, 6); 3764 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3765 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3766 hci_run(); 3767 return 0; 3768 } 3769 3770 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3771 btstack_linked_list_iterator_t it; 3772 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3773 while (btstack_linked_list_iterator_has_next(&it)){ 3774 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3775 if (entry->address_type != address_type) continue; 3776 if (memcmp(entry->address, address, 6) != 0) continue; 3777 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3778 // remove from controller if already present 3779 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3780 continue; 3781 } 3782 // direclty remove entry from whitelist 3783 btstack_linked_list_iterator_remove(&it); 3784 btstack_memory_whitelist_entry_free(entry); 3785 } 3786 } 3787 3788 /** 3789 * @brief Auto Connection Establishment - Stop Connecting to device 3790 * @param address_typ 3791 * @param address 3792 * @returns 0 if ok 3793 */ 3794 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3795 hci_remove_from_whitelist(address_type, address); 3796 hci_run(); 3797 return 0; 3798 } 3799 3800 /** 3801 * @brief Auto Connection Establishment - Stop everything 3802 * @note Convenience function to stop all active auto connection attempts 3803 */ 3804 void gap_auto_connection_stop_all(void){ 3805 btstack_linked_list_iterator_t it; 3806 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3807 while (btstack_linked_list_iterator_has_next(&it)){ 3808 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3809 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3810 // remove from controller if already present 3811 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3812 continue; 3813 } 3814 // directly remove entry from whitelist 3815 btstack_linked_list_iterator_remove(&it); 3816 btstack_memory_whitelist_entry_free(entry); 3817 } 3818 hci_run(); 3819 } 3820 #endif 3821 #endif 3822 3823 #ifdef ENABLE_CLASSIC 3824 /** 3825 * @brief Set Extended Inquiry Response data 3826 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3827 * @note has to be done before stack starts up 3828 */ 3829 void gap_set_extended_inquiry_response(const uint8_t * data){ 3830 hci_stack->eir_data = data; 3831 } 3832 3833 /** 3834 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3835 * @param inquriy_mode see bluetooth_defines.h 3836 */ 3837 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3838 hci_stack->inquiry_mode = mode; 3839 } 3840 3841 /** 3842 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3843 */ 3844 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3845 hci_stack->sco_voice_setting = voice_setting; 3846 } 3847 3848 /** 3849 * @brief Get SCO Voice Setting 3850 * @return current voice setting 3851 */ 3852 uint16_t hci_get_sco_voice_setting(void){ 3853 return hci_stack->sco_voice_setting; 3854 } 3855 3856 /** @brief Get SCO packet length for current SCO Voice setting 3857 * @note Using SCO packets of the exact length is required for USB transfer 3858 * @return Length of SCO packets in bytes (not audio frames) 3859 */ 3860 int hci_get_sco_packet_length(void){ 3861 // see Core Spec for H2 USB Transfer. 3862 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3863 return 27; 3864 } 3865 #endif 3866 3867 /** 3868 * @brief Set callback for Bluetooth Hardware Error 3869 */ 3870 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3871 hci_stack->hardware_error_callback = fn; 3872 } 3873 3874 void hci_disconnect_all(void){ 3875 btstack_linked_list_iterator_t it; 3876 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3877 while (btstack_linked_list_iterator_has_next(&it)){ 3878 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3879 if (con->state == SENT_DISCONNECT) continue; 3880 con->state = SEND_DISCONNECT; 3881 } 3882 hci_run(); 3883 } 3884 3885 uint16_t hci_get_manufacturer(void){ 3886 return hci_stack->manufacturer; 3887 } 3888