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 #ifdef ENABLE_BLE 1420 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1421 // skip write le host if not supported (e.g. on LE only EM9301) 1422 if (hci_stack->local_supported_commands[0] & 0x02) break; 1423 #ifdef ENABLE_LE_CENTRAL 1424 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1425 #else 1426 hci_init_done(); 1427 #endif 1428 return; 1429 #endif 1430 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1431 // skip write eir data if no eir data set 1432 if (hci_stack->eir_data) break; 1433 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1434 return; 1435 1436 #ifdef ENABLE_SCO_OVER_HCI 1437 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1438 // skip write synchronous flow control if not supported 1439 if (hci_stack->local_supported_commands[0] & 0x04) break; 1440 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1441 // explicit fall through to reduce repetitions 1442 1443 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1444 // skip write default erroneous data reporting if not supported 1445 if (hci_stack->local_supported_commands[0] & 0x08) break; 1446 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1447 // explicit fall through to reduce repetitions 1448 1449 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1450 if (!hci_le_supported()){ 1451 // SKIP LE init for Classic only configuration 1452 hci_init_done(); 1453 return; 1454 } 1455 break; 1456 #else 1457 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1458 if (!hci_le_supported()){ 1459 // SKIP LE init for Classic only configuration 1460 hci_init_done(); 1461 return; 1462 } 1463 #endif 1464 break; 1465 // Response to command before init done state -> init done 1466 case (HCI_INIT_DONE-1): 1467 hci_init_done(); 1468 return; 1469 1470 default: 1471 break; 1472 } 1473 hci_initializing_next_state(); 1474 } 1475 1476 static void event_handler(uint8_t *packet, int size){ 1477 1478 uint16_t event_length = packet[1]; 1479 1480 // assert packet is complete 1481 if (size != event_length + 2){ 1482 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1483 return; 1484 } 1485 1486 bd_addr_t addr; 1487 bd_addr_type_t addr_type; 1488 uint8_t link_type; 1489 hci_con_handle_t handle; 1490 hci_connection_t * conn; 1491 int i; 1492 1493 // warnings 1494 (void) link_type; 1495 1496 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1497 1498 switch (hci_event_packet_get_type(packet)) { 1499 1500 case HCI_EVENT_COMMAND_COMPLETE: 1501 // get num cmd packets - limit to 1 to reduce complexity 1502 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1503 1504 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1505 if (packet[5]) break; 1506 // terminate, name 248 chars 1507 packet[6+248] = 0; 1508 log_info("local name: %s", &packet[6]); 1509 } 1510 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1511 // from offset 5 1512 // status 1513 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1514 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1515 hci_stack->sco_data_packet_length = packet[8]; 1516 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1517 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1518 1519 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1520 // determine usable ACL payload size 1521 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1522 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1523 } 1524 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1525 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1526 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1527 } 1528 } 1529 #ifdef ENABLE_BLE 1530 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1531 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1532 hci_stack->le_acl_packets_total_num = packet[8]; 1533 // determine usable ACL payload size 1534 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1535 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1536 } 1537 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1538 } 1539 #ifdef ENABLE_LE_CENTRAL 1540 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1541 hci_stack->le_whitelist_capacity = packet[6]; 1542 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1543 } 1544 #endif 1545 #endif 1546 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1547 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1548 hci_stack->local_bd_addr); 1549 log_info("Local Address, Status: 0x%02x: Addr: %s", 1550 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1551 #ifdef ENABLE_CLASSIC 1552 if (hci_stack->link_key_db){ 1553 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1554 } 1555 #endif 1556 } 1557 #ifdef ENABLE_CLASSIC 1558 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1559 hci_emit_discoverable_enabled(hci_stack->discoverable); 1560 } 1561 #endif 1562 1563 // Note: HCI init checks 1564 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1565 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1566 1567 #ifdef ENABLE_CLASSIC 1568 // determine usable ACL packet types based on host buffer size and supported features 1569 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1570 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1571 #endif 1572 // Classic/LE 1573 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1574 } 1575 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1576 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1577 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1578 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1579 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1580 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1581 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1582 } 1583 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1584 hci_stack->local_supported_commands[0] = 1585 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1586 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1587 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1588 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1589 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1590 } 1591 #ifdef ENABLE_CLASSIC 1592 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1593 if (packet[5] == 0){ 1594 hci_stack->synchronous_flow_control_enabled = 1; 1595 } 1596 } 1597 #endif 1598 break; 1599 1600 case HCI_EVENT_COMMAND_STATUS: 1601 // get num cmd packets - limit to 1 to reduce complexity 1602 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1603 break; 1604 1605 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1606 int offset = 3; 1607 for (i=0; i<packet[2];i++){ 1608 handle = little_endian_read_16(packet, offset); 1609 offset += 2; 1610 uint16_t num_packets = little_endian_read_16(packet, offset); 1611 offset += 2; 1612 1613 conn = hci_connection_for_handle(handle); 1614 if (!conn){ 1615 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1616 continue; 1617 } 1618 1619 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1620 #ifdef ENABLE_CLASSIC 1621 if (conn->num_sco_packets_sent >= num_packets){ 1622 conn->num_sco_packets_sent -= num_packets; 1623 } else { 1624 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1625 conn->num_sco_packets_sent = 0; 1626 } 1627 hci_notify_if_sco_can_send_now(); 1628 #endif 1629 } else { 1630 if (conn->num_acl_packets_sent >= num_packets){ 1631 conn->num_acl_packets_sent -= num_packets; 1632 } else { 1633 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1634 conn->num_acl_packets_sent = 0; 1635 } 1636 } 1637 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1638 } 1639 break; 1640 } 1641 1642 #ifdef ENABLE_CLASSIC 1643 case HCI_EVENT_CONNECTION_REQUEST: 1644 reverse_bd_addr(&packet[2], addr); 1645 // TODO: eval COD 8-10 1646 link_type = packet[11]; 1647 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1648 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1649 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1650 if (!conn) { 1651 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1652 } 1653 if (!conn) { 1654 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1655 hci_stack->decline_reason = 0x0d; 1656 bd_addr_copy(hci_stack->decline_addr, addr); 1657 break; 1658 } 1659 conn->role = HCI_ROLE_SLAVE; 1660 conn->state = RECEIVED_CONNECTION_REQUEST; 1661 // store info about eSCO 1662 if (link_type == 0x02){ 1663 conn->remote_supported_feature_eSCO = 1; 1664 } 1665 hci_run(); 1666 break; 1667 1668 case HCI_EVENT_CONNECTION_COMPLETE: 1669 // Connection management 1670 reverse_bd_addr(&packet[5], addr); 1671 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1672 addr_type = BD_ADDR_TYPE_CLASSIC; 1673 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1674 if (conn) { 1675 if (!packet[2]){ 1676 conn->state = OPEN; 1677 conn->con_handle = little_endian_read_16(packet, 3); 1678 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1679 1680 // restart timer 1681 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1682 btstack_run_loop_add_timer(&conn->timeout); 1683 1684 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1685 1686 hci_emit_nr_connections_changed(); 1687 } else { 1688 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1689 uint8_t status = packet[2]; 1690 bd_addr_t bd_address; 1691 memcpy(&bd_address, conn->address, 6); 1692 1693 // connection failed, remove entry 1694 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1695 btstack_memory_hci_connection_free( conn ); 1696 1697 // notify client if dedicated bonding 1698 if (notify_dedicated_bonding_failed){ 1699 log_info("hci notify_dedicated_bonding_failed"); 1700 hci_emit_dedicated_bonding_result(bd_address, status); 1701 } 1702 1703 // if authentication error, also delete link key 1704 if (packet[2] == 0x05) { 1705 gap_drop_link_key_for_bd_addr(addr); 1706 } 1707 } 1708 } 1709 break; 1710 1711 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1712 reverse_bd_addr(&packet[5], addr); 1713 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1714 if (packet[2]){ 1715 // connection failed 1716 break; 1717 } 1718 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1719 if (!conn) { 1720 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1721 } 1722 if (!conn) { 1723 break; 1724 } 1725 conn->state = OPEN; 1726 conn->con_handle = little_endian_read_16(packet, 3); 1727 break; 1728 1729 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1730 handle = little_endian_read_16(packet, 3); 1731 conn = hci_connection_for_handle(handle); 1732 if (!conn) break; 1733 if (!packet[2]){ 1734 uint8_t * features = &packet[5]; 1735 if (features[6] & (1 << 3)){ 1736 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1737 } 1738 if (features[3] & (1<<7)){ 1739 conn->remote_supported_feature_eSCO = 1; 1740 } 1741 } 1742 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1743 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1744 if (conn->bonding_flags & BONDING_DEDICATED){ 1745 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1746 } 1747 break; 1748 1749 case HCI_EVENT_LINK_KEY_REQUEST: 1750 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1751 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1752 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1753 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1754 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1755 hci_run(); 1756 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1757 return; 1758 1759 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1760 reverse_bd_addr(&packet[2], addr); 1761 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1762 if (!conn) break; 1763 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1764 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1765 // Change Connection Encryption keeps link key type 1766 if (link_key_type != CHANGED_COMBINATION_KEY){ 1767 conn->link_key_type = link_key_type; 1768 } 1769 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1770 // still forward event to allow dismiss of pairing dialog 1771 break; 1772 } 1773 1774 case HCI_EVENT_PIN_CODE_REQUEST: 1775 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1776 // non-bondable mode: pin code negative reply will be sent 1777 if (!hci_stack->bondable){ 1778 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1779 hci_run(); 1780 return; 1781 } 1782 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1783 if (!hci_stack->link_key_db) break; 1784 hci_event_pin_code_request_get_bd_addr(packet, addr); 1785 hci_stack->link_key_db->delete_link_key(addr); 1786 break; 1787 1788 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1789 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1790 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1791 break; 1792 1793 case HCI_EVENT_USER_CONFIRMATION_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_CONFIRM_REPLY); 1797 break; 1798 1799 case HCI_EVENT_USER_PASSKEY_REQUEST: 1800 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1801 if (!hci_stack->ssp_auto_accept) break; 1802 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1803 break; 1804 #endif 1805 1806 case HCI_EVENT_ENCRYPTION_CHANGE: 1807 handle = little_endian_read_16(packet, 3); 1808 conn = hci_connection_for_handle(handle); 1809 if (!conn) break; 1810 if (packet[2] == 0) { 1811 if (packet[5]){ 1812 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1813 } else { 1814 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1815 } 1816 } 1817 #ifdef ENABLE_CLASSIC 1818 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1819 #endif 1820 break; 1821 1822 #ifdef ENABLE_CLASSIC 1823 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1824 handle = little_endian_read_16(packet, 3); 1825 conn = hci_connection_for_handle(handle); 1826 if (!conn) break; 1827 1828 // dedicated bonding: send result and disconnect 1829 if (conn->bonding_flags & BONDING_DEDICATED){ 1830 conn->bonding_flags &= ~BONDING_DEDICATED; 1831 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1832 conn->bonding_status = packet[2]; 1833 break; 1834 } 1835 1836 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1837 // link key sufficient for requested security 1838 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1839 break; 1840 } 1841 // not enough 1842 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1843 break; 1844 #endif 1845 1846 // HCI_EVENT_DISCONNECTION_COMPLETE 1847 // has been split, to first notify stack before shutting connection down 1848 // see end of function, too. 1849 case HCI_EVENT_DISCONNECTION_COMPLETE: 1850 if (packet[2]) break; // status != 0 1851 handle = little_endian_read_16(packet, 3); 1852 // drop outgoing ACL fragments if it is for closed connection 1853 if (hci_stack->acl_fragmentation_total_size > 0) { 1854 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1855 log_info("hci: drop fragmented ACL data for closed connection"); 1856 hci_stack->acl_fragmentation_total_size = 0; 1857 hci_stack->acl_fragmentation_pos = 0; 1858 } 1859 } 1860 1861 // re-enable advertisements for le connections if active 1862 conn = hci_connection_for_handle(handle); 1863 if (!conn) break; 1864 #ifdef ENABLE_BLE 1865 #ifdef ENABLE_LE_PERIPHERAL 1866 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1867 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1868 } 1869 #endif 1870 #endif 1871 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1872 break; 1873 1874 case HCI_EVENT_HARDWARE_ERROR: 1875 log_error("Hardware Error: 0x%02x", packet[2]); 1876 if (hci_stack->hardware_error_callback){ 1877 (*hci_stack->hardware_error_callback)(packet[2]); 1878 } else { 1879 // if no special requests, just reboot stack 1880 hci_power_control_off(); 1881 hci_power_control_on(); 1882 } 1883 break; 1884 1885 #ifdef ENABLE_CLASSIC 1886 case HCI_EVENT_ROLE_CHANGE: 1887 if (packet[2]) break; // status != 0 1888 handle = little_endian_read_16(packet, 3); 1889 conn = hci_connection_for_handle(handle); 1890 if (!conn) break; // no conn 1891 conn->role = packet[9]; 1892 break; 1893 #endif 1894 1895 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1896 // release packet buffer only for asynchronous transport and if there are not further fragements 1897 if (hci_transport_synchronous()) { 1898 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1899 return; // instead of break: to avoid re-entering hci_run() 1900 } 1901 if (hci_stack->acl_fragmentation_total_size) break; 1902 hci_release_packet_buffer(); 1903 1904 // L2CAP receives this event via the hci_emit_event below 1905 1906 #ifdef ENABLE_CLASSIC 1907 // For SCO, we do the can_send_now_check here 1908 hci_notify_if_sco_can_send_now(); 1909 #endif 1910 break; 1911 1912 #ifdef ENABLE_CLASSIC 1913 case HCI_EVENT_SCO_CAN_SEND_NOW: 1914 // For SCO, we do the can_send_now_check here 1915 hci_notify_if_sco_can_send_now(); 1916 return; 1917 #endif 1918 1919 #ifdef ENABLE_BLE 1920 case HCI_EVENT_LE_META: 1921 switch (packet[2]){ 1922 #ifdef ENABLE_LE_CENTRAL 1923 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1924 // log_info("advertising report received"); 1925 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1926 le_handle_advertisement_report(packet, size); 1927 break; 1928 #endif 1929 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1930 // Connection management 1931 reverse_bd_addr(&packet[8], addr); 1932 addr_type = (bd_addr_type_t)packet[7]; 1933 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1934 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1935 #ifdef ENABLE_LE_CENTRAL 1936 // if auto-connect, remove from whitelist in both roles 1937 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1938 hci_remove_from_whitelist(addr_type, addr); 1939 } 1940 // handle error: error is reported only to the initiator -> outgoing connection 1941 if (packet[3]){ 1942 // outgoing connection establishment is done 1943 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1944 // remove entry 1945 if (conn){ 1946 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1947 btstack_memory_hci_connection_free( conn ); 1948 } 1949 break; 1950 } 1951 #endif 1952 // on success, both hosts receive connection complete event 1953 if (packet[6] == HCI_ROLE_MASTER){ 1954 #ifdef ENABLE_LE_CENTRAL 1955 // if we're master, it was an outgoing connection and we're done with it 1956 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1957 #endif 1958 } else { 1959 #ifdef ENABLE_LE_PERIPHERAL 1960 // if we're slave, it was an incoming connection, advertisements have stopped 1961 hci_stack->le_advertisements_active = 0; 1962 // try to re-enable them 1963 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1964 #endif 1965 } 1966 // LE connections are auto-accepted, so just create a connection if there isn't one already 1967 if (!conn){ 1968 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1969 } 1970 // no memory, sorry. 1971 if (!conn){ 1972 break; 1973 } 1974 1975 conn->state = OPEN; 1976 conn->role = packet[6]; 1977 conn->con_handle = little_endian_read_16(packet, 4); 1978 1979 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1980 1981 // restart timer 1982 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1983 // btstack_run_loop_add_timer(&conn->timeout); 1984 1985 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1986 1987 hci_emit_nr_connections_changed(); 1988 break; 1989 1990 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1991 1992 default: 1993 break; 1994 } 1995 break; 1996 #endif 1997 default: 1998 break; 1999 } 2000 2001 // handle BT initialization 2002 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2003 hci_initializing_event_handler(packet, size); 2004 } 2005 2006 // help with BT sleep 2007 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2008 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2009 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2010 hci_initializing_next_state(); 2011 } 2012 2013 // notify upper stack 2014 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2015 2016 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2017 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2018 if (!packet[2]){ 2019 handle = little_endian_read_16(packet, 3); 2020 hci_connection_t * aConn = hci_connection_for_handle(handle); 2021 if (aConn) { 2022 uint8_t status = aConn->bonding_status; 2023 uint16_t flags = aConn->bonding_flags; 2024 bd_addr_t bd_address; 2025 memcpy(&bd_address, aConn->address, 6); 2026 hci_shutdown_connection(aConn); 2027 // connection struct is gone, don't access anymore 2028 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2029 hci_emit_dedicated_bonding_result(bd_address, status); 2030 } 2031 } 2032 } 2033 } 2034 2035 // execute main loop 2036 hci_run(); 2037 } 2038 2039 #ifdef ENABLE_CLASSIC 2040 static void sco_handler(uint8_t * packet, uint16_t size){ 2041 if (!hci_stack->sco_packet_handler) return; 2042 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2043 } 2044 #endif 2045 2046 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2047 hci_dump_packet(packet_type, 1, packet, size); 2048 switch (packet_type) { 2049 case HCI_EVENT_PACKET: 2050 event_handler(packet, size); 2051 break; 2052 case HCI_ACL_DATA_PACKET: 2053 acl_handler(packet, size); 2054 break; 2055 #ifdef ENABLE_CLASSIC 2056 case HCI_SCO_DATA_PACKET: 2057 sco_handler(packet, size); 2058 break; 2059 #endif 2060 default: 2061 break; 2062 } 2063 } 2064 2065 /** 2066 * @brief Add event packet handler. 2067 */ 2068 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2069 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2070 } 2071 2072 2073 /** Register HCI packet handlers */ 2074 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2075 hci_stack->acl_packet_handler = handler; 2076 } 2077 2078 #ifdef ENABLE_CLASSIC 2079 /** 2080 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2081 */ 2082 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2083 hci_stack->sco_packet_handler = handler; 2084 } 2085 #endif 2086 2087 static void hci_state_reset(void){ 2088 // no connections yet 2089 hci_stack->connections = NULL; 2090 2091 // keep discoverable/connectable as this has been requested by the client(s) 2092 // hci_stack->discoverable = 0; 2093 // hci_stack->connectable = 0; 2094 // hci_stack->bondable = 1; 2095 // hci_stack->own_addr_type = 0; 2096 2097 // buffer is free 2098 hci_stack->hci_packet_buffer_reserved = 0; 2099 2100 // no pending cmds 2101 hci_stack->decline_reason = 0; 2102 hci_stack->new_scan_enable_value = 0xff; 2103 2104 // LE 2105 #ifdef ENABLE_BLE 2106 memset(hci_stack->le_random_address, 0, 6); 2107 hci_stack->le_random_address_set = 0; 2108 #endif 2109 #ifdef ENABLE_LE_CENTRAL 2110 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2111 hci_stack->le_scan_type = 0xff; 2112 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2113 hci_stack->le_whitelist = 0; 2114 hci_stack->le_whitelist_capacity = 0; 2115 #endif 2116 2117 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2118 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2119 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2120 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2121 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2122 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2123 } 2124 2125 #ifdef ENABLE_CLASSIC 2126 /** 2127 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2128 */ 2129 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2130 // store and open remote device db 2131 hci_stack->link_key_db = link_key_db; 2132 if (hci_stack->link_key_db) { 2133 hci_stack->link_key_db->open(); 2134 } 2135 } 2136 #endif 2137 2138 void hci_init(const hci_transport_t *transport, const void *config){ 2139 2140 #ifdef HAVE_MALLOC 2141 if (!hci_stack) { 2142 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2143 } 2144 #else 2145 hci_stack = &hci_stack_static; 2146 #endif 2147 memset(hci_stack, 0, sizeof(hci_stack_t)); 2148 2149 // reference to use transport layer implementation 2150 hci_stack->hci_transport = transport; 2151 2152 // reference to used config 2153 hci_stack->config = config; 2154 2155 // setup pointer for outgoing packet buffer 2156 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2157 2158 // max acl payload size defined in config.h 2159 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2160 2161 // register packet handlers with transport 2162 transport->register_packet_handler(&packet_handler); 2163 2164 hci_stack->state = HCI_STATE_OFF; 2165 2166 // class of device 2167 hci_stack->class_of_device = 0x007a020c; // Smartphone 2168 2169 // bondable by default 2170 hci_stack->bondable = 1; 2171 2172 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2173 hci_stack->ssp_enable = 1; 2174 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2175 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2176 hci_stack->ssp_auto_accept = 1; 2177 2178 // voice setting - signed 8 bit pcm data with CVSD over the air 2179 hci_stack->sco_voice_setting = 0x40; 2180 2181 hci_state_reset(); 2182 } 2183 2184 /** 2185 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2186 */ 2187 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2188 hci_stack->chipset = chipset_driver; 2189 2190 // reset chipset driver - init is also called on power_up 2191 if (hci_stack->chipset && hci_stack->chipset->init){ 2192 hci_stack->chipset->init(hci_stack->config); 2193 } 2194 } 2195 2196 /** 2197 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2198 */ 2199 void hci_set_control(const btstack_control_t *hardware_control){ 2200 // references to used control implementation 2201 hci_stack->control = hardware_control; 2202 // init with transport config 2203 hardware_control->init(hci_stack->config); 2204 } 2205 2206 void hci_close(void){ 2207 // close remote device db 2208 if (hci_stack->link_key_db) { 2209 hci_stack->link_key_db->close(); 2210 } 2211 2212 btstack_linked_list_iterator_t lit; 2213 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2214 while (btstack_linked_list_iterator_has_next(&lit)){ 2215 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2216 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2217 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2218 hci_shutdown_connection(connection); 2219 } 2220 2221 hci_power_control(HCI_POWER_OFF); 2222 2223 #ifdef HAVE_MALLOC 2224 free(hci_stack); 2225 #endif 2226 hci_stack = NULL; 2227 } 2228 2229 #ifdef ENABLE_CLASSIC 2230 void gap_set_class_of_device(uint32_t class_of_device){ 2231 hci_stack->class_of_device = class_of_device; 2232 } 2233 2234 void hci_disable_l2cap_timeout_check(void){ 2235 disable_l2cap_timeouts = 1; 2236 } 2237 #endif 2238 2239 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2240 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2241 void hci_set_bd_addr(bd_addr_t addr){ 2242 memcpy(hci_stack->custom_bd_addr, addr, 6); 2243 hci_stack->custom_bd_addr_set = 1; 2244 } 2245 #endif 2246 2247 // State-Module-Driver overview 2248 // state module low-level 2249 // HCI_STATE_OFF off close 2250 // HCI_STATE_INITIALIZING, on open 2251 // HCI_STATE_WORKING, on open 2252 // HCI_STATE_HALTING, on open 2253 // HCI_STATE_SLEEPING, off/sleep close 2254 // HCI_STATE_FALLING_ASLEEP on open 2255 2256 static int hci_power_control_on(void){ 2257 2258 // power on 2259 int err = 0; 2260 if (hci_stack->control && hci_stack->control->on){ 2261 err = (*hci_stack->control->on)(); 2262 } 2263 if (err){ 2264 log_error( "POWER_ON failed"); 2265 hci_emit_hci_open_failed(); 2266 return err; 2267 } 2268 2269 // int chipset driver 2270 if (hci_stack->chipset && hci_stack->chipset->init){ 2271 hci_stack->chipset->init(hci_stack->config); 2272 } 2273 2274 // init transport 2275 if (hci_stack->hci_transport->init){ 2276 hci_stack->hci_transport->init(hci_stack->config); 2277 } 2278 2279 // open transport 2280 err = hci_stack->hci_transport->open(); 2281 if (err){ 2282 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2283 if (hci_stack->control && hci_stack->control->off){ 2284 (*hci_stack->control->off)(); 2285 } 2286 hci_emit_hci_open_failed(); 2287 return err; 2288 } 2289 return 0; 2290 } 2291 2292 static void hci_power_control_off(void){ 2293 2294 log_info("hci_power_control_off"); 2295 2296 // close low-level device 2297 hci_stack->hci_transport->close(); 2298 2299 log_info("hci_power_control_off - hci_transport closed"); 2300 2301 // power off 2302 if (hci_stack->control && hci_stack->control->off){ 2303 (*hci_stack->control->off)(); 2304 } 2305 2306 log_info("hci_power_control_off - control closed"); 2307 2308 hci_stack->state = HCI_STATE_OFF; 2309 } 2310 2311 static void hci_power_control_sleep(void){ 2312 2313 log_info("hci_power_control_sleep"); 2314 2315 #if 0 2316 // don't close serial port during sleep 2317 2318 // close low-level device 2319 hci_stack->hci_transport->close(hci_stack->config); 2320 #endif 2321 2322 // sleep mode 2323 if (hci_stack->control && hci_stack->control->sleep){ 2324 (*hci_stack->control->sleep)(); 2325 } 2326 2327 hci_stack->state = HCI_STATE_SLEEPING; 2328 } 2329 2330 static int hci_power_control_wake(void){ 2331 2332 log_info("hci_power_control_wake"); 2333 2334 // wake on 2335 if (hci_stack->control && hci_stack->control->wake){ 2336 (*hci_stack->control->wake)(); 2337 } 2338 2339 #if 0 2340 // open low-level device 2341 int err = hci_stack->hci_transport->open(hci_stack->config); 2342 if (err){ 2343 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2344 if (hci_stack->control && hci_stack->control->off){ 2345 (*hci_stack->control->off)(); 2346 } 2347 hci_emit_hci_open_failed(); 2348 return err; 2349 } 2350 #endif 2351 2352 return 0; 2353 } 2354 2355 static void hci_power_transition_to_initializing(void){ 2356 // set up state machine 2357 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2358 hci_stack->hci_packet_buffer_reserved = 0; 2359 hci_stack->state = HCI_STATE_INITIALIZING; 2360 hci_stack->substate = HCI_INIT_SEND_RESET; 2361 } 2362 2363 int hci_power_control(HCI_POWER_MODE power_mode){ 2364 2365 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2366 2367 int err = 0; 2368 switch (hci_stack->state){ 2369 2370 case HCI_STATE_OFF: 2371 switch (power_mode){ 2372 case HCI_POWER_ON: 2373 err = hci_power_control_on(); 2374 if (err) { 2375 log_error("hci_power_control_on() error %d", err); 2376 return err; 2377 } 2378 hci_power_transition_to_initializing(); 2379 break; 2380 case HCI_POWER_OFF: 2381 // do nothing 2382 break; 2383 case HCI_POWER_SLEEP: 2384 // do nothing (with SLEEP == OFF) 2385 break; 2386 } 2387 break; 2388 2389 case HCI_STATE_INITIALIZING: 2390 switch (power_mode){ 2391 case HCI_POWER_ON: 2392 // do nothing 2393 break; 2394 case HCI_POWER_OFF: 2395 // no connections yet, just turn it off 2396 hci_power_control_off(); 2397 break; 2398 case HCI_POWER_SLEEP: 2399 // no connections yet, just turn it off 2400 hci_power_control_sleep(); 2401 break; 2402 } 2403 break; 2404 2405 case HCI_STATE_WORKING: 2406 switch (power_mode){ 2407 case HCI_POWER_ON: 2408 // do nothing 2409 break; 2410 case HCI_POWER_OFF: 2411 // see hci_run 2412 hci_stack->state = HCI_STATE_HALTING; 2413 break; 2414 case HCI_POWER_SLEEP: 2415 // see hci_run 2416 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2417 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2418 break; 2419 } 2420 break; 2421 2422 case HCI_STATE_HALTING: 2423 switch (power_mode){ 2424 case HCI_POWER_ON: 2425 hci_power_transition_to_initializing(); 2426 break; 2427 case HCI_POWER_OFF: 2428 // do nothing 2429 break; 2430 case HCI_POWER_SLEEP: 2431 // see hci_run 2432 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2433 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2434 break; 2435 } 2436 break; 2437 2438 case HCI_STATE_FALLING_ASLEEP: 2439 switch (power_mode){ 2440 case HCI_POWER_ON: 2441 2442 #ifdef HAVE_PLATFORM_IPHONE_OS 2443 // nothing to do, if H4 supports power management 2444 if (btstack_control_iphone_power_management_enabled()){ 2445 hci_stack->state = HCI_STATE_INITIALIZING; 2446 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2447 break; 2448 } 2449 #endif 2450 hci_power_transition_to_initializing(); 2451 break; 2452 case HCI_POWER_OFF: 2453 // see hci_run 2454 hci_stack->state = HCI_STATE_HALTING; 2455 break; 2456 case HCI_POWER_SLEEP: 2457 // do nothing 2458 break; 2459 } 2460 break; 2461 2462 case HCI_STATE_SLEEPING: 2463 switch (power_mode){ 2464 case HCI_POWER_ON: 2465 2466 #ifdef HAVE_PLATFORM_IPHONE_OS 2467 // nothing to do, if H4 supports power management 2468 if (btstack_control_iphone_power_management_enabled()){ 2469 hci_stack->state = HCI_STATE_INITIALIZING; 2470 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2471 hci_update_scan_enable(); 2472 break; 2473 } 2474 #endif 2475 err = hci_power_control_wake(); 2476 if (err) return err; 2477 hci_power_transition_to_initializing(); 2478 break; 2479 case HCI_POWER_OFF: 2480 hci_stack->state = HCI_STATE_HALTING; 2481 break; 2482 case HCI_POWER_SLEEP: 2483 // do nothing 2484 break; 2485 } 2486 break; 2487 } 2488 2489 // create internal event 2490 hci_emit_state(); 2491 2492 // trigger next/first action 2493 hci_run(); 2494 2495 return 0; 2496 } 2497 2498 2499 #ifdef ENABLE_CLASSIC 2500 2501 static void hci_update_scan_enable(void){ 2502 // 2 = page scan, 1 = inq scan 2503 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2504 hci_run(); 2505 } 2506 2507 void gap_discoverable_control(uint8_t enable){ 2508 if (enable) enable = 1; // normalize argument 2509 2510 if (hci_stack->discoverable == enable){ 2511 hci_emit_discoverable_enabled(hci_stack->discoverable); 2512 return; 2513 } 2514 2515 hci_stack->discoverable = enable; 2516 hci_update_scan_enable(); 2517 } 2518 2519 void gap_connectable_control(uint8_t enable){ 2520 if (enable) enable = 1; // normalize argument 2521 2522 // don't emit event 2523 if (hci_stack->connectable == enable) return; 2524 2525 hci_stack->connectable = enable; 2526 hci_update_scan_enable(); 2527 } 2528 #endif 2529 2530 void gap_local_bd_addr(bd_addr_t address_buffer){ 2531 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2532 } 2533 2534 static void hci_run(void){ 2535 2536 // log_info("hci_run: entered"); 2537 btstack_linked_item_t * it; 2538 2539 // send continuation fragments first, as they block the prepared packet buffer 2540 if (hci_stack->acl_fragmentation_total_size > 0) { 2541 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2542 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2543 if (connection) { 2544 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2545 hci_send_acl_packet_fragments(connection); 2546 return; 2547 } 2548 } else { 2549 // connection gone -> discard further fragments 2550 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2551 hci_stack->acl_fragmentation_total_size = 0; 2552 hci_stack->acl_fragmentation_pos = 0; 2553 } 2554 } 2555 2556 if (!hci_can_send_command_packet_now()) return; 2557 2558 // global/non-connection oriented commands 2559 2560 #ifdef ENABLE_CLASSIC 2561 // decline incoming connections 2562 if (hci_stack->decline_reason){ 2563 uint8_t reason = hci_stack->decline_reason; 2564 hci_stack->decline_reason = 0; 2565 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2566 return; 2567 } 2568 2569 // send scan enable 2570 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2571 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2572 hci_stack->new_scan_enable_value = 0xff; 2573 return; 2574 } 2575 #endif 2576 2577 #ifdef ENABLE_BLE 2578 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2579 if ((hci_stack->state == HCI_STATE_WORKING) 2580 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2581 2582 #ifdef ENABLE_LE_CENTRAL 2583 // handle le scan 2584 switch(hci_stack->le_scanning_state){ 2585 case LE_START_SCAN: 2586 hci_stack->le_scanning_state = LE_SCANNING; 2587 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2588 return; 2589 2590 case LE_STOP_SCAN: 2591 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2592 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2593 return; 2594 default: 2595 break; 2596 } 2597 if (hci_stack->le_scan_type != 0xff){ 2598 // defaults: active scanning, accept all advertisement packets 2599 int scan_type = hci_stack->le_scan_type; 2600 hci_stack->le_scan_type = 0xff; 2601 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); 2602 return; 2603 } 2604 #endif 2605 #ifdef ENABLE_LE_PERIPHERAL 2606 // le advertisement control 2607 if (hci_stack->le_advertisements_todo){ 2608 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2609 } 2610 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2611 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2612 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2613 return; 2614 } 2615 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2616 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2617 hci_send_cmd(&hci_le_set_advertising_parameters, 2618 hci_stack->le_advertisements_interval_min, 2619 hci_stack->le_advertisements_interval_max, 2620 hci_stack->le_advertisements_type, 2621 hci_stack->le_own_addr_type, 2622 hci_stack->le_advertisements_direct_address_type, 2623 hci_stack->le_advertisements_direct_address, 2624 hci_stack->le_advertisements_channel_map, 2625 hci_stack->le_advertisements_filter_policy); 2626 return; 2627 } 2628 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2629 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2630 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2631 return; 2632 } 2633 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2634 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2635 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2636 hci_stack->le_scan_response_data); 2637 return; 2638 } 2639 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2640 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2641 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2642 return; 2643 } 2644 #endif 2645 2646 #ifdef ENABLE_LE_CENTRAL 2647 // 2648 // LE Whitelist Management 2649 // 2650 2651 // check if whitelist needs modification 2652 btstack_linked_list_iterator_t lit; 2653 int modification_pending = 0; 2654 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2655 while (btstack_linked_list_iterator_has_next(&lit)){ 2656 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2657 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2658 modification_pending = 1; 2659 break; 2660 } 2661 } 2662 2663 if (modification_pending){ 2664 // stop connnecting if modification pending 2665 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2666 hci_send_cmd(&hci_le_create_connection_cancel); 2667 return; 2668 } 2669 2670 // add/remove entries 2671 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2672 while (btstack_linked_list_iterator_has_next(&lit)){ 2673 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2674 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2675 entry->state = LE_WHITELIST_ON_CONTROLLER; 2676 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2677 return; 2678 2679 } 2680 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2681 bd_addr_t address; 2682 bd_addr_type_t address_type = entry->address_type; 2683 memcpy(address, entry->address, 6); 2684 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2685 btstack_memory_whitelist_entry_free(entry); 2686 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2687 return; 2688 } 2689 } 2690 } 2691 2692 // start connecting 2693 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2694 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2695 bd_addr_t null_addr; 2696 memset(null_addr, 0, 6); 2697 hci_send_cmd(&hci_le_create_connection, 2698 0x0060, // scan interval: 60 ms 2699 0x0030, // scan interval: 30 ms 2700 1, // use whitelist 2701 0, // peer address type 2702 null_addr, // peer bd addr 2703 hci_stack->le_own_addr_type, // our addr type: 2704 0x0008, // conn interval min 2705 0x0018, // conn interval max 2706 0, // conn latency 2707 0x0048, // supervision timeout 2708 0x0001, // min ce length 2709 0x0001 // max ce length 2710 ); 2711 return; 2712 } 2713 #endif 2714 } 2715 #endif 2716 2717 // send pending HCI commands 2718 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2719 hci_connection_t * connection = (hci_connection_t *) it; 2720 2721 switch(connection->state){ 2722 case SEND_CREATE_CONNECTION: 2723 switch(connection->address_type){ 2724 #ifdef ENABLE_CLASSIC 2725 case BD_ADDR_TYPE_CLASSIC: 2726 log_info("sending hci_create_connection"); 2727 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2728 break; 2729 #endif 2730 default: 2731 #ifdef ENABLE_BLE 2732 #ifdef ENABLE_LE_CENTRAL 2733 log_info("sending hci_le_create_connection"); 2734 hci_send_cmd(&hci_le_create_connection, 2735 0x0060, // scan interval: 60 ms 2736 0x0030, // scan interval: 30 ms 2737 0, // don't use whitelist 2738 connection->address_type, // peer address type 2739 connection->address, // peer bd addr 2740 hci_stack->le_own_addr_type, // our addr type: 2741 0x0008, // conn interval min 2742 0x0018, // conn interval max 2743 0, // conn latency 2744 0x0048, // supervision timeout 2745 0x0001, // min ce length 2746 0x0001 // max ce length 2747 ); 2748 2749 connection->state = SENT_CREATE_CONNECTION; 2750 #endif 2751 #endif 2752 break; 2753 } 2754 return; 2755 2756 #ifdef ENABLE_CLASSIC 2757 case RECEIVED_CONNECTION_REQUEST: 2758 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2759 connection->state = ACCEPTED_CONNECTION_REQUEST; 2760 connection->role = HCI_ROLE_SLAVE; 2761 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2762 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2763 } 2764 return; 2765 #endif 2766 2767 #ifdef ENABLE_BLE 2768 #ifdef ENABLE_LE_CENTRAL 2769 case SEND_CANCEL_CONNECTION: 2770 connection->state = SENT_CANCEL_CONNECTION; 2771 hci_send_cmd(&hci_le_create_connection_cancel); 2772 return; 2773 #endif 2774 #endif 2775 case SEND_DISCONNECT: 2776 connection->state = SENT_DISCONNECT; 2777 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2778 return; 2779 2780 default: 2781 break; 2782 } 2783 2784 #ifdef ENABLE_CLASSIC 2785 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2786 log_info("responding to link key request"); 2787 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2788 link_key_t link_key; 2789 link_key_type_t link_key_type; 2790 if ( hci_stack->link_key_db 2791 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2792 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2793 connection->link_key_type = link_key_type; 2794 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2795 } else { 2796 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2797 } 2798 return; 2799 } 2800 2801 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2802 log_info("denying to pin request"); 2803 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2804 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2805 return; 2806 } 2807 2808 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2809 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2810 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2811 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2812 // tweak authentication requirements 2813 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2814 if (connection->bonding_flags & BONDING_DEDICATED){ 2815 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2816 } 2817 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2818 authreq |= 1; 2819 } 2820 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2821 } else { 2822 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2823 } 2824 return; 2825 } 2826 2827 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2828 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2829 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2830 return; 2831 } 2832 2833 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2834 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2835 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2836 return; 2837 } 2838 2839 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2840 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2841 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2842 return; 2843 } 2844 2845 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2846 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2847 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2848 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2849 return; 2850 } 2851 2852 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2853 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2854 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2855 return; 2856 } 2857 2858 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2859 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2860 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2861 return; 2862 } 2863 #endif 2864 2865 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2866 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2867 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2868 return; 2869 } 2870 2871 #ifdef ENABLE_BLE 2872 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2873 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2874 2875 uint16_t connection_interval_min = connection->le_conn_interval_min; 2876 connection->le_conn_interval_min = 0; 2877 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2878 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2879 0x0000, 0xffff); 2880 } 2881 #endif 2882 } 2883 2884 hci_connection_t * connection; 2885 switch (hci_stack->state){ 2886 case HCI_STATE_INITIALIZING: 2887 hci_initializing_run(); 2888 break; 2889 2890 case HCI_STATE_HALTING: 2891 2892 log_info("HCI_STATE_HALTING"); 2893 2894 // free whitelist entries 2895 #ifdef ENABLE_BLE 2896 #ifdef ENABLE_LE_CENTRAL 2897 { 2898 btstack_linked_list_iterator_t lit; 2899 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2900 while (btstack_linked_list_iterator_has_next(&lit)){ 2901 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2902 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2903 btstack_memory_whitelist_entry_free(entry); 2904 } 2905 } 2906 #endif 2907 #endif 2908 // close all open connections 2909 connection = (hci_connection_t *) hci_stack->connections; 2910 if (connection){ 2911 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2912 if (!hci_can_send_command_packet_now()) return; 2913 2914 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2915 2916 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2917 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2918 2919 // ... which would be ignored anyway as we shutdown (free) the connection now 2920 hci_shutdown_connection(connection); 2921 2922 // finally, send the disconnect command 2923 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2924 return; 2925 } 2926 log_info("HCI_STATE_HALTING, calling off"); 2927 2928 // switch mode 2929 hci_power_control_off(); 2930 2931 log_info("HCI_STATE_HALTING, emitting state"); 2932 hci_emit_state(); 2933 log_info("HCI_STATE_HALTING, done"); 2934 break; 2935 2936 case HCI_STATE_FALLING_ASLEEP: 2937 switch(hci_stack->substate) { 2938 case HCI_FALLING_ASLEEP_DISCONNECT: 2939 log_info("HCI_STATE_FALLING_ASLEEP"); 2940 // close all open connections 2941 connection = (hci_connection_t *) hci_stack->connections; 2942 2943 #ifdef HAVE_PLATFORM_IPHONE_OS 2944 // don't close connections, if H4 supports power management 2945 if (btstack_control_iphone_power_management_enabled()){ 2946 connection = NULL; 2947 } 2948 #endif 2949 if (connection){ 2950 2951 // send disconnect 2952 if (!hci_can_send_command_packet_now()) return; 2953 2954 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2955 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2956 2957 // send disconnected event right away - causes higher layer connections to get closed, too. 2958 hci_shutdown_connection(connection); 2959 return; 2960 } 2961 2962 if (hci_classic_supported()){ 2963 // disable page and inquiry scan 2964 if (!hci_can_send_command_packet_now()) return; 2965 2966 log_info("HCI_STATE_HALTING, disabling inq scans"); 2967 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2968 2969 // continue in next sub state 2970 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2971 break; 2972 } 2973 // no break - fall through for ble-only chips 2974 2975 case HCI_FALLING_ASLEEP_COMPLETE: 2976 log_info("HCI_STATE_HALTING, calling sleep"); 2977 #ifdef HAVE_PLATFORM_IPHONE_OS 2978 // don't actually go to sleep, if H4 supports power management 2979 if (btstack_control_iphone_power_management_enabled()){ 2980 // SLEEP MODE reached 2981 hci_stack->state = HCI_STATE_SLEEPING; 2982 hci_emit_state(); 2983 break; 2984 } 2985 #endif 2986 // switch mode 2987 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2988 hci_emit_state(); 2989 break; 2990 2991 default: 2992 break; 2993 } 2994 break; 2995 2996 default: 2997 break; 2998 } 2999 } 3000 3001 int hci_send_cmd_packet(uint8_t *packet, int size){ 3002 // house-keeping 3003 3004 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3005 hci_stack->loopback_mode = packet[3]; 3006 } 3007 3008 #ifdef ENABLE_CLASSIC 3009 bd_addr_t addr; 3010 hci_connection_t * conn; 3011 3012 // create_connection? 3013 if (IS_COMMAND(packet, hci_create_connection)){ 3014 reverse_bd_addr(&packet[3], addr); 3015 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3016 3017 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3018 if (!conn){ 3019 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3020 if (!conn){ 3021 // notify client that alloc failed 3022 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3023 return 0; // don't sent packet to controller 3024 } 3025 conn->state = SEND_CREATE_CONNECTION; 3026 } 3027 log_info("conn state %u", conn->state); 3028 switch (conn->state){ 3029 // if connection active exists 3030 case OPEN: 3031 // and OPEN, emit connection complete command, don't send to controller 3032 hci_emit_connection_complete(addr, conn->con_handle, 0); 3033 return 0; 3034 case SEND_CREATE_CONNECTION: 3035 // connection created by hci, e.g. dedicated bonding 3036 break; 3037 default: 3038 // otherwise, just ignore as it is already in the open process 3039 return 0; 3040 } 3041 conn->state = SENT_CREATE_CONNECTION; 3042 } 3043 3044 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3045 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3046 } 3047 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3048 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3049 } 3050 3051 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3052 if (hci_stack->link_key_db){ 3053 reverse_bd_addr(&packet[3], addr); 3054 hci_stack->link_key_db->delete_link_key(addr); 3055 } 3056 } 3057 3058 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3059 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3060 reverse_bd_addr(&packet[3], addr); 3061 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3062 if (conn){ 3063 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3064 } 3065 } 3066 3067 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3068 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3069 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3070 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3071 reverse_bd_addr(&packet[3], addr); 3072 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3073 if (conn){ 3074 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3075 } 3076 } 3077 #endif 3078 3079 #ifdef ENABLE_BLE 3080 #ifdef ENABLE_LE_PERIPHERAL 3081 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3082 hci_stack->le_random_address_set = 1; 3083 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3084 } 3085 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3086 hci_stack->le_advertisements_active = packet[3]; 3087 } 3088 #endif 3089 #ifdef ENABLE_LE_CENTRAL 3090 if (IS_COMMAND(packet, hci_le_create_connection)){ 3091 // white list used? 3092 uint8_t initiator_filter_policy = packet[7]; 3093 switch (initiator_filter_policy){ 3094 case 0: 3095 // whitelist not used 3096 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3097 break; 3098 case 1: 3099 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3100 break; 3101 default: 3102 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3103 break; 3104 } 3105 } 3106 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3107 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3108 } 3109 #endif 3110 #endif 3111 3112 hci_stack->num_cmd_packets--; 3113 3114 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3115 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3116 3117 // release packet buffer for synchronous transport implementations 3118 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3119 hci_stack->hci_packet_buffer_reserved = 0; 3120 } 3121 3122 return err; 3123 } 3124 3125 // disconnect because of security block 3126 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3127 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3128 if (!connection) return; 3129 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3130 } 3131 3132 3133 // Configure Secure Simple Pairing 3134 3135 #ifdef ENABLE_CLASSIC 3136 3137 // enable will enable SSP during init 3138 void gap_ssp_set_enable(int enable){ 3139 hci_stack->ssp_enable = enable; 3140 } 3141 3142 static int hci_local_ssp_activated(void){ 3143 return gap_ssp_supported() && hci_stack->ssp_enable; 3144 } 3145 3146 // if set, BTstack will respond to io capability request using authentication requirement 3147 void gap_ssp_set_io_capability(int io_capability){ 3148 hci_stack->ssp_io_capability = io_capability; 3149 } 3150 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3151 hci_stack->ssp_authentication_requirement = authentication_requirement; 3152 } 3153 3154 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3155 void gap_ssp_set_auto_accept(int auto_accept){ 3156 hci_stack->ssp_auto_accept = auto_accept; 3157 } 3158 #endif 3159 3160 // va_list part of hci_send_cmd 3161 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3162 if (!hci_can_send_command_packet_now()){ 3163 log_error("hci_send_cmd called but cannot send packet now"); 3164 return 0; 3165 } 3166 3167 // for HCI INITIALIZATION 3168 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3169 hci_stack->last_cmd_opcode = cmd->opcode; 3170 3171 hci_reserve_packet_buffer(); 3172 uint8_t * packet = hci_stack->hci_packet_buffer; 3173 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3174 return hci_send_cmd_packet(packet, size); 3175 } 3176 3177 /** 3178 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3179 */ 3180 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3181 va_list argptr; 3182 va_start(argptr, cmd); 3183 int res = hci_send_cmd_va_arg(cmd, argptr); 3184 va_end(argptr); 3185 return res; 3186 } 3187 3188 // Create various non-HCI events. 3189 // TODO: generalize, use table similar to hci_create_command 3190 3191 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3192 // dump packet 3193 if (dump) { 3194 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3195 } 3196 3197 // dispatch to all event handlers 3198 btstack_linked_list_iterator_t it; 3199 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3200 while (btstack_linked_list_iterator_has_next(&it)){ 3201 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3202 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3203 } 3204 } 3205 3206 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3207 if (!hci_stack->acl_packet_handler) return; 3208 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3209 } 3210 3211 #ifdef ENABLE_CLASSIC 3212 static void hci_notify_if_sco_can_send_now(void){ 3213 // notify SCO sender if waiting 3214 if (!hci_stack->sco_waiting_for_can_send_now) return; 3215 if (hci_can_send_sco_packet_now()){ 3216 hci_stack->sco_waiting_for_can_send_now = 0; 3217 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3218 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3219 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3220 } 3221 } 3222 #endif 3223 3224 void hci_emit_state(void){ 3225 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3226 uint8_t event[3]; 3227 event[0] = BTSTACK_EVENT_STATE; 3228 event[1] = sizeof(event) - 2; 3229 event[2] = hci_stack->state; 3230 hci_emit_event(event, sizeof(event), 1); 3231 } 3232 3233 #ifdef ENABLE_CLASSIC 3234 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3235 uint8_t event[13]; 3236 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3237 event[1] = sizeof(event) - 2; 3238 event[2] = status; 3239 little_endian_store_16(event, 3, con_handle); 3240 reverse_bd_addr(address, &event[5]); 3241 event[11] = 1; // ACL connection 3242 event[12] = 0; // encryption disabled 3243 hci_emit_event(event, sizeof(event), 1); 3244 } 3245 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3246 if (disable_l2cap_timeouts) return; 3247 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3248 uint8_t event[4]; 3249 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3250 event[1] = sizeof(event) - 2; 3251 little_endian_store_16(event, 2, conn->con_handle); 3252 hci_emit_event(event, sizeof(event), 1); 3253 } 3254 #endif 3255 3256 #ifdef ENABLE_BLE 3257 #ifdef ENABLE_LE_CENTRAL 3258 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3259 uint8_t event[21]; 3260 event[0] = HCI_EVENT_LE_META; 3261 event[1] = sizeof(event) - 2; 3262 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3263 event[3] = status; 3264 little_endian_store_16(event, 4, con_handle); 3265 event[6] = 0; // TODO: role 3266 event[7] = address_type; 3267 reverse_bd_addr(address, &event[8]); 3268 little_endian_store_16(event, 14, 0); // interval 3269 little_endian_store_16(event, 16, 0); // latency 3270 little_endian_store_16(event, 18, 0); // supervision timeout 3271 event[20] = 0; // master clock accuracy 3272 hci_emit_event(event, sizeof(event), 1); 3273 } 3274 #endif 3275 #endif 3276 3277 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3278 uint8_t event[6]; 3279 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3280 event[1] = sizeof(event) - 2; 3281 event[2] = 0; // status = OK 3282 little_endian_store_16(event, 3, con_handle); 3283 event[5] = reason; 3284 hci_emit_event(event, sizeof(event), 1); 3285 } 3286 3287 static void hci_emit_nr_connections_changed(void){ 3288 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3289 uint8_t event[3]; 3290 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3291 event[1] = sizeof(event) - 2; 3292 event[2] = nr_hci_connections(); 3293 hci_emit_event(event, sizeof(event), 1); 3294 } 3295 3296 static void hci_emit_hci_open_failed(void){ 3297 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3298 uint8_t event[2]; 3299 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3300 event[1] = sizeof(event) - 2; 3301 hci_emit_event(event, sizeof(event), 1); 3302 } 3303 3304 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3305 log_info("hci_emit_dedicated_bonding_result %u ", status); 3306 uint8_t event[9]; 3307 int pos = 0; 3308 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3309 event[pos++] = sizeof(event) - 2; 3310 event[pos++] = status; 3311 reverse_bd_addr(address, &event[pos]); 3312 hci_emit_event(event, sizeof(event), 1); 3313 } 3314 3315 3316 #ifdef ENABLE_CLASSIC 3317 3318 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3319 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3320 uint8_t event[5]; 3321 int pos = 0; 3322 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3323 event[pos++] = sizeof(event) - 2; 3324 little_endian_store_16(event, 2, con_handle); 3325 pos += 2; 3326 event[pos++] = level; 3327 hci_emit_event(event, sizeof(event), 1); 3328 } 3329 3330 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3331 if (!connection) return LEVEL_0; 3332 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3333 return gap_security_level_for_link_key_type(connection->link_key_type); 3334 } 3335 3336 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3337 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3338 uint8_t event[3]; 3339 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3340 event[1] = sizeof(event) - 2; 3341 event[2] = enabled; 3342 hci_emit_event(event, sizeof(event), 1); 3343 } 3344 3345 #ifdef ENABLE_CLASSIC 3346 // query if remote side supports eSCO 3347 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3348 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3349 if (!connection) return 0; 3350 return connection->remote_supported_feature_eSCO; 3351 } 3352 3353 // query if remote side supports SSP 3354 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3355 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3356 if (!connection) return 0; 3357 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3358 } 3359 3360 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3361 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3362 } 3363 #endif 3364 3365 // GAP API 3366 /** 3367 * @bbrief enable/disable bonding. default is enabled 3368 * @praram enabled 3369 */ 3370 void gap_set_bondable_mode(int enable){ 3371 hci_stack->bondable = enable ? 1 : 0; 3372 } 3373 /** 3374 * @brief Get bondable mode. 3375 * @return 1 if bondable 3376 */ 3377 int gap_get_bondable_mode(void){ 3378 return hci_stack->bondable; 3379 } 3380 3381 /** 3382 * @brief map link keys to security levels 3383 */ 3384 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3385 switch (link_key_type){ 3386 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3387 return LEVEL_4; 3388 case COMBINATION_KEY: 3389 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3390 return LEVEL_3; 3391 default: 3392 return LEVEL_2; 3393 } 3394 } 3395 3396 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3397 log_info("gap_mitm_protection_required_for_security_level %u", level); 3398 return level > LEVEL_2; 3399 } 3400 3401 /** 3402 * @brief get current security level 3403 */ 3404 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3405 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3406 if (!connection) return LEVEL_0; 3407 return gap_security_level_for_connection(connection); 3408 } 3409 3410 /** 3411 * @brief request connection to device to 3412 * @result GAP_AUTHENTICATION_RESULT 3413 */ 3414 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3415 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3416 if (!connection){ 3417 hci_emit_security_level(con_handle, LEVEL_0); 3418 return; 3419 } 3420 gap_security_level_t current_level = gap_security_level(con_handle); 3421 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3422 if (current_level >= requested_level){ 3423 hci_emit_security_level(con_handle, current_level); 3424 return; 3425 } 3426 3427 connection->requested_security_level = requested_level; 3428 3429 #if 0 3430 // sending encryption request without a link key results in an error. 3431 // TODO: figure out how to use it properly 3432 3433 // would enabling ecnryption suffice (>= LEVEL_2)? 3434 if (hci_stack->link_key_db){ 3435 link_key_type_t link_key_type; 3436 link_key_t link_key; 3437 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3438 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3439 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3440 return; 3441 } 3442 } 3443 } 3444 #endif 3445 3446 // try to authenticate connection 3447 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3448 hci_run(); 3449 } 3450 3451 /** 3452 * @brief start dedicated bonding with device. disconnect after bonding 3453 * @param device 3454 * @param request MITM protection 3455 * @result GAP_DEDICATED_BONDING_COMPLETE 3456 */ 3457 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3458 3459 // create connection state machine 3460 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3461 3462 if (!connection){ 3463 return BTSTACK_MEMORY_ALLOC_FAILED; 3464 } 3465 3466 // delete linkn key 3467 gap_drop_link_key_for_bd_addr(device); 3468 3469 // configure LEVEL_2/3, dedicated bonding 3470 connection->state = SEND_CREATE_CONNECTION; 3471 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3472 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3473 connection->bonding_flags = BONDING_DEDICATED; 3474 3475 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3476 3477 // handle: connnection failure (connection complete != ok) 3478 // handle: authentication failure 3479 // handle: disconnect on done 3480 3481 hci_run(); 3482 3483 return 0; 3484 } 3485 #endif 3486 3487 void gap_set_local_name(const char * local_name){ 3488 hci_stack->local_name = local_name; 3489 } 3490 3491 3492 #ifdef ENABLE_BLE 3493 3494 #ifdef ENABLE_LE_CENTRAL 3495 void gap_start_scan(void){ 3496 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3497 hci_stack->le_scanning_state = LE_START_SCAN; 3498 hci_run(); 3499 } 3500 3501 void gap_stop_scan(void){ 3502 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3503 hci_stack->le_scanning_state = LE_STOP_SCAN; 3504 hci_run(); 3505 } 3506 3507 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3508 hci_stack->le_scan_type = scan_type; 3509 hci_stack->le_scan_interval = scan_interval; 3510 hci_stack->le_scan_window = scan_window; 3511 hci_run(); 3512 } 3513 3514 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3515 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3516 if (!conn){ 3517 log_info("gap_connect: no connection exists yet, creating context"); 3518 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3519 if (!conn){ 3520 // notify client that alloc failed 3521 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3522 log_info("gap_connect: failed to alloc hci_connection_t"); 3523 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3524 } 3525 conn->state = SEND_CREATE_CONNECTION; 3526 log_info("gap_connect: send create connection next"); 3527 hci_run(); 3528 return 0; 3529 } 3530 3531 if (!hci_is_le_connection(conn) || 3532 conn->state == SEND_CREATE_CONNECTION || 3533 conn->state == SENT_CREATE_CONNECTION) { 3534 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3535 log_error("gap_connect: classic connection or connect is already being created"); 3536 return GATT_CLIENT_IN_WRONG_STATE; 3537 } 3538 3539 log_info("gap_connect: context exists with state %u", conn->state); 3540 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3541 hci_run(); 3542 return 0; 3543 } 3544 3545 // @assumption: only a single outgoing LE Connection exists 3546 static hci_connection_t * gap_get_outgoing_connection(void){ 3547 btstack_linked_item_t *it; 3548 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3549 hci_connection_t * conn = (hci_connection_t *) it; 3550 if (!hci_is_le_connection(conn)) continue; 3551 switch (conn->state){ 3552 case SEND_CREATE_CONNECTION: 3553 case SENT_CREATE_CONNECTION: 3554 return conn; 3555 default: 3556 break; 3557 }; 3558 } 3559 return NULL; 3560 } 3561 3562 uint8_t gap_connect_cancel(void){ 3563 hci_connection_t * conn = gap_get_outgoing_connection(); 3564 if (!conn) return 0; 3565 switch (conn->state){ 3566 case SEND_CREATE_CONNECTION: 3567 // skip sending create connection and emit event instead 3568 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3569 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3570 btstack_memory_hci_connection_free( conn ); 3571 break; 3572 case SENT_CREATE_CONNECTION: 3573 // request to send cancel connection 3574 conn->state = SEND_CANCEL_CONNECTION; 3575 hci_run(); 3576 break; 3577 default: 3578 break; 3579 } 3580 return 0; 3581 } 3582 #endif 3583 3584 /** 3585 * @brief Updates the connection parameters for a given LE connection 3586 * @param handle 3587 * @param conn_interval_min (unit: 1.25ms) 3588 * @param conn_interval_max (unit: 1.25ms) 3589 * @param conn_latency 3590 * @param supervision_timeout (unit: 10ms) 3591 * @returns 0 if ok 3592 */ 3593 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3594 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3595 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3596 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3597 connection->le_conn_interval_min = conn_interval_min; 3598 connection->le_conn_interval_max = conn_interval_max; 3599 connection->le_conn_latency = conn_latency; 3600 connection->le_supervision_timeout = supervision_timeout; 3601 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3602 hci_run(); 3603 return 0; 3604 } 3605 3606 /** 3607 * @brief Request an update of the connection parameter for a given LE connection 3608 * @param handle 3609 * @param conn_interval_min (unit: 1.25ms) 3610 * @param conn_interval_max (unit: 1.25ms) 3611 * @param conn_latency 3612 * @param supervision_timeout (unit: 10ms) 3613 * @returns 0 if ok 3614 */ 3615 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3616 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3617 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3618 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3619 connection->le_conn_interval_min = conn_interval_min; 3620 connection->le_conn_interval_max = conn_interval_max; 3621 connection->le_conn_latency = conn_latency; 3622 connection->le_supervision_timeout = supervision_timeout; 3623 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3624 hci_run(); 3625 return 0; 3626 } 3627 3628 #ifdef ENABLE_LE_PERIPHERAL 3629 3630 static void gap_advertisments_changed(void){ 3631 // disable advertisements before updating adv, scan data, or adv params 3632 if (hci_stack->le_advertisements_active){ 3633 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3634 } 3635 hci_run(); 3636 } 3637 3638 /** 3639 * @brief Set Advertisement Data 3640 * @param advertising_data_length 3641 * @param advertising_data (max 31 octets) 3642 * @note data is not copied, pointer has to stay valid 3643 */ 3644 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3645 hci_stack->le_advertisements_data_len = advertising_data_length; 3646 hci_stack->le_advertisements_data = advertising_data; 3647 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3648 gap_advertisments_changed(); 3649 } 3650 3651 /** 3652 * @brief Set Scan Response Data 3653 * @param advertising_data_length 3654 * @param advertising_data (max 31 octets) 3655 * @note data is not copied, pointer has to stay valid 3656 */ 3657 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3658 hci_stack->le_scan_response_data_len = scan_response_data_length; 3659 hci_stack->le_scan_response_data = scan_response_data; 3660 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3661 gap_advertisments_changed(); 3662 } 3663 3664 /** 3665 * @brief Set Advertisement Parameters 3666 * @param adv_int_min 3667 * @param adv_int_max 3668 * @param adv_type 3669 * @param direct_address_type 3670 * @param direct_address 3671 * @param channel_map 3672 * @param filter_policy 3673 * 3674 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3675 */ 3676 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3677 uint8_t direct_address_typ, bd_addr_t direct_address, 3678 uint8_t channel_map, uint8_t filter_policy) { 3679 3680 hci_stack->le_advertisements_interval_min = adv_int_min; 3681 hci_stack->le_advertisements_interval_max = adv_int_max; 3682 hci_stack->le_advertisements_type = adv_type; 3683 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3684 hci_stack->le_advertisements_channel_map = channel_map; 3685 hci_stack->le_advertisements_filter_policy = filter_policy; 3686 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3687 3688 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3689 gap_advertisments_changed(); 3690 } 3691 3692 /** 3693 * @brief Enable/Disable Advertisements 3694 * @param enabled 3695 */ 3696 void gap_advertisements_enable(int enabled){ 3697 hci_stack->le_advertisements_enabled = enabled; 3698 if (enabled && !hci_stack->le_advertisements_active){ 3699 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3700 } 3701 if (!enabled && hci_stack->le_advertisements_active){ 3702 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3703 } 3704 hci_run(); 3705 } 3706 3707 #endif 3708 3709 void hci_le_set_own_address_type(uint8_t own_address_type){ 3710 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3711 if (own_address_type == hci_stack->le_own_addr_type) return; 3712 hci_stack->le_own_addr_type = own_address_type; 3713 3714 // update advertisement parameters, too 3715 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3716 gap_advertisments_changed(); 3717 // note: we don't update scan parameters or modify ongoing connection attempts 3718 } 3719 3720 #endif 3721 3722 uint8_t gap_disconnect(hci_con_handle_t handle){ 3723 hci_connection_t * conn = hci_connection_for_handle(handle); 3724 if (!conn){ 3725 hci_emit_disconnection_complete(handle, 0); 3726 return 0; 3727 } 3728 conn->state = SEND_DISCONNECT; 3729 hci_run(); 3730 return 0; 3731 } 3732 3733 /** 3734 * @brief Get connection type 3735 * @param con_handle 3736 * @result connection_type 3737 */ 3738 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3739 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3740 if (!conn) return GAP_CONNECTION_INVALID; 3741 switch (conn->address_type){ 3742 case BD_ADDR_TYPE_LE_PUBLIC: 3743 case BD_ADDR_TYPE_LE_RANDOM: 3744 return GAP_CONNECTION_LE; 3745 case BD_ADDR_TYPE_SCO: 3746 return GAP_CONNECTION_SCO; 3747 case BD_ADDR_TYPE_CLASSIC: 3748 return GAP_CONNECTION_ACL; 3749 default: 3750 return GAP_CONNECTION_INVALID; 3751 } 3752 } 3753 3754 #ifdef ENABLE_BLE 3755 3756 #ifdef ENABLE_LE_CENTRAL 3757 /** 3758 * @brief Auto Connection Establishment - Start Connecting to device 3759 * @param address_typ 3760 * @param address 3761 * @returns 0 if ok 3762 */ 3763 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3764 // check capacity 3765 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3766 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3767 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3768 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3769 entry->address_type = address_type; 3770 memcpy(entry->address, address, 6); 3771 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3772 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3773 hci_run(); 3774 return 0; 3775 } 3776 3777 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3778 btstack_linked_list_iterator_t it; 3779 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3780 while (btstack_linked_list_iterator_has_next(&it)){ 3781 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3782 if (entry->address_type != address_type) continue; 3783 if (memcmp(entry->address, address, 6) != 0) continue; 3784 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3785 // remove from controller if already present 3786 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3787 continue; 3788 } 3789 // direclty remove entry from whitelist 3790 btstack_linked_list_iterator_remove(&it); 3791 btstack_memory_whitelist_entry_free(entry); 3792 } 3793 } 3794 3795 /** 3796 * @brief Auto Connection Establishment - Stop Connecting to device 3797 * @param address_typ 3798 * @param address 3799 * @returns 0 if ok 3800 */ 3801 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3802 hci_remove_from_whitelist(address_type, address); 3803 hci_run(); 3804 return 0; 3805 } 3806 3807 /** 3808 * @brief Auto Connection Establishment - Stop everything 3809 * @note Convenience function to stop all active auto connection attempts 3810 */ 3811 void gap_auto_connection_stop_all(void){ 3812 btstack_linked_list_iterator_t it; 3813 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3814 while (btstack_linked_list_iterator_has_next(&it)){ 3815 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3816 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3817 // remove from controller if already present 3818 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3819 continue; 3820 } 3821 // directly remove entry from whitelist 3822 btstack_linked_list_iterator_remove(&it); 3823 btstack_memory_whitelist_entry_free(entry); 3824 } 3825 hci_run(); 3826 } 3827 #endif 3828 #endif 3829 3830 #ifdef ENABLE_CLASSIC 3831 /** 3832 * @brief Set Extended Inquiry Response data 3833 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3834 * @note has to be done before stack starts up 3835 */ 3836 void gap_set_extended_inquiry_response(const uint8_t * data){ 3837 hci_stack->eir_data = data; 3838 } 3839 3840 /** 3841 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3842 * @param inquriy_mode see bluetooth_defines.h 3843 */ 3844 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3845 hci_stack->inquiry_mode = mode; 3846 } 3847 3848 /** 3849 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3850 */ 3851 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3852 hci_stack->sco_voice_setting = voice_setting; 3853 } 3854 3855 /** 3856 * @brief Get SCO Voice Setting 3857 * @return current voice setting 3858 */ 3859 uint16_t hci_get_sco_voice_setting(void){ 3860 return hci_stack->sco_voice_setting; 3861 } 3862 3863 /** @brief Get SCO packet length for current SCO Voice setting 3864 * @note Using SCO packets of the exact length is required for USB transfer 3865 * @return Length of SCO packets in bytes (not audio frames) 3866 */ 3867 int hci_get_sco_packet_length(void){ 3868 // see Core Spec for H2 USB Transfer. 3869 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3870 return 27; 3871 } 3872 #endif 3873 3874 /** 3875 * @brief Set callback for Bluetooth Hardware Error 3876 */ 3877 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3878 hci_stack->hardware_error_callback = fn; 3879 } 3880 3881 void hci_disconnect_all(void){ 3882 btstack_linked_list_iterator_t it; 3883 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3884 while (btstack_linked_list_iterator_has_next(&it)){ 3885 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3886 if (con->state == SENT_DISCONNECT) continue; 3887 con->state = SEND_DISCONNECT; 3888 } 3889 hci_run(); 3890 } 3891 3892 uint16_t hci_get_manufacturer(void){ 3893 return hci_stack->manufacturer; 3894 } 3895