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 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->role = HCI_ROLE_INVALID; 199 conn->address_type = addr_type; 200 conn->con_handle = 0xffff; 201 conn->authentication_flags = AUTH_FLAGS_NONE; 202 conn->bonding_flags = 0; 203 conn->requested_security_level = LEVEL_0; 204 #ifdef ENABLE_CLASSIC 205 conn->request_role = HCI_ROLE_INVALID; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 222 return conn; 223 } 224 225 226 /** 227 * get le connection parameter range 228 * 229 * @return le connection parameter range struct 230 */ 231 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 232 *range = hci_stack->le_connection_parameter_range; 233 } 234 235 /** 236 * set le connection parameter range 237 * 238 */ 239 240 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 241 hci_stack->le_connection_parameter_range = *range; 242 } 243 244 /** 245 * @brief Test if connection parameters are inside in existing rage 246 * @param conn_interval_min (unit: 1.25ms) 247 * @param conn_interval_max (unit: 1.25ms) 248 * @param conn_latency 249 * @param supervision_timeout (unit: 10ms) 250 * @returns 1 if included 251 */ 252 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 253 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 254 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 255 256 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 257 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 258 259 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 260 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 261 262 return 1; 263 } 264 265 /** 266 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 267 * @note: default: 1 268 * @param max_peripheral_connections 269 */ 270 #ifdef ENABLE_LE_PERIPHERAL 271 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 272 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 273 } 274 #endif 275 276 /** 277 * get hci connections iterator 278 * 279 * @return hci connections iterator 280 */ 281 282 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 283 btstack_linked_list_iterator_init(it, &hci_stack->connections); 284 } 285 286 /** 287 * get connection for a given handle 288 * 289 * @return connection OR NULL, if not found 290 */ 291 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 296 if ( item->con_handle == con_handle ) { 297 return item; 298 } 299 } 300 return NULL; 301 } 302 303 /** 304 * get connection for given address 305 * 306 * @return connection OR NULL, if not found 307 */ 308 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 309 btstack_linked_list_iterator_t it; 310 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 311 while (btstack_linked_list_iterator_has_next(&it)){ 312 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 313 if (connection->address_type != addr_type) continue; 314 if (memcmp(addr, connection->address, 6) != 0) continue; 315 return connection; 316 } 317 return NULL; 318 } 319 320 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 321 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 322 } 323 324 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 326 } 327 328 #ifdef ENABLE_CLASSIC 329 330 #ifdef ENABLE_SCO_OVER_HCI 331 static int hci_number_sco_connections(void){ 332 int connections = 0; 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 338 connections++; 339 } 340 return connections; 341 } 342 #endif 343 344 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 345 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 346 #ifdef HAVE_EMBEDDED_TICK 347 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 348 // connections might be timed out 349 hci_emit_l2cap_check_timeout(connection); 350 } 351 #else 352 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 353 // connections might be timed out 354 hci_emit_l2cap_check_timeout(connection); 355 } 356 #endif 357 } 358 359 static void hci_connection_timestamp(hci_connection_t *connection){ 360 #ifdef HAVE_EMBEDDED_TICK 361 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 362 #else 363 connection->timestamp = btstack_run_loop_get_time_ms(); 364 #endif 365 } 366 367 /** 368 * add authentication flags and reset timer 369 * @note: assumes classic connection 370 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 371 */ 372 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 373 bd_addr_t addr; 374 reverse_bd_addr(bd_addr, addr); 375 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 376 if (conn) { 377 connectionSetAuthenticationFlags(conn, flags); 378 hci_connection_timestamp(conn); 379 } 380 } 381 382 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 383 hci_connection_t * conn = hci_connection_for_handle(handle); 384 if (!conn) return 0; 385 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 386 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 387 return 0; 388 } 389 390 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 391 if (!hci_stack->link_key_db) return; 392 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 393 hci_stack->link_key_db->delete_link_key(addr); 394 } 395 396 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 397 if (!hci_stack->link_key_db) return; 398 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 399 hci_stack->link_key_db->put_link_key(addr, link_key, type); 400 } 401 402 void gap_delete_all_link_keys(void){ 403 bd_addr_t addr; 404 link_key_t link_key; 405 link_key_type_t type; 406 btstack_link_key_iterator_t it; 407 int ok = gap_link_key_iterator_init(&it); 408 if (!ok) { 409 log_error("could not initialize iterator"); 410 return; 411 } 412 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 413 gap_drop_link_key_for_bd_addr(addr); 414 } 415 gap_link_key_iterator_done(&it); 416 } 417 418 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 419 if (!hci_stack->link_key_db) return 0; 420 if (!hci_stack->link_key_db->iterator_init) return 0; 421 return hci_stack->link_key_db->iterator_init(it); 422 } 423 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 424 if (!hci_stack->link_key_db) return 0; 425 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 426 } 427 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 428 if (!hci_stack->link_key_db) return; 429 hci_stack->link_key_db->iterator_done(it); 430 } 431 #endif 432 433 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 434 switch (address_type){ 435 case BD_ADDR_TYPE_LE_PUBLIC: 436 case BD_ADDR_TYPE_LE_RANDOM: 437 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 438 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 439 return true; 440 default: 441 return false; 442 } 443 } 444 445 static int hci_is_le_connection(hci_connection_t * connection){ 446 return hci_is_le_connection_type(connection->address_type); 447 } 448 449 /** 450 * count connections 451 */ 452 static int nr_hci_connections(void){ 453 int count = 0; 454 btstack_linked_item_t *it; 455 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 456 count++; 457 } 458 return count; 459 } 460 461 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 462 463 unsigned int num_packets_sent_classic = 0; 464 unsigned int num_packets_sent_le = 0; 465 466 btstack_linked_item_t *it; 467 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 468 hci_connection_t * connection = (hci_connection_t *) it; 469 if (hci_is_le_connection(connection)){ 470 num_packets_sent_le += connection->num_packets_sent; 471 } 472 if (connection->address_type == BD_ADDR_TYPE_ACL){ 473 num_packets_sent_classic += connection->num_packets_sent; 474 } 475 } 476 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 477 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 478 int free_slots_le = 0; 479 480 if (free_slots_classic < 0){ 481 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); 482 return 0; 483 } 484 485 if (hci_stack->le_acl_packets_total_num){ 486 // if we have LE slots, they are used 487 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 488 if (free_slots_le < 0){ 489 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); 490 return 0; 491 } 492 } else { 493 // otherwise, classic slots are used for LE, too 494 free_slots_classic -= num_packets_sent_le; 495 if (free_slots_classic < 0){ 496 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); 497 return 0; 498 } 499 } 500 501 switch (address_type){ 502 case BD_ADDR_TYPE_UNKNOWN: 503 log_error("hci_number_free_acl_slots: unknown address type"); 504 return 0; 505 506 case BD_ADDR_TYPE_ACL: 507 return free_slots_classic; 508 509 default: 510 if (hci_stack->le_acl_packets_total_num){ 511 return free_slots_le; 512 } 513 return free_slots_classic; 514 } 515 } 516 517 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 518 // get connection type 519 hci_connection_t * connection = hci_connection_for_handle(con_handle); 520 if (!connection){ 521 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 522 return 0; 523 } 524 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 525 } 526 527 #ifdef ENABLE_CLASSIC 528 static int hci_number_free_sco_slots(void){ 529 unsigned int num_sco_packets_sent = 0; 530 btstack_linked_item_t *it; 531 if (hci_stack->synchronous_flow_control_enabled){ 532 // explicit flow control 533 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 534 hci_connection_t * connection = (hci_connection_t *) it; 535 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 536 num_sco_packets_sent += connection->num_packets_sent; 537 } 538 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 539 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 540 return 0; 541 } 542 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 543 } else { 544 // implicit flow control -- TODO 545 int num_ready = 0; 546 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 547 hci_connection_t * connection = (hci_connection_t *) it; 548 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 549 if (connection->sco_tx_ready == 0) continue; 550 num_ready++; 551 } 552 return num_ready; 553 } 554 } 555 #endif 556 557 // only used to send HCI Host Number Completed Packets 558 static int hci_can_send_comand_packet_transport(void){ 559 if (hci_stack->hci_packet_buffer_reserved) return 0; 560 561 // check for async hci transport implementations 562 if (hci_stack->hci_transport->can_send_packet_now){ 563 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 564 return 0; 565 } 566 } 567 return 1; 568 } 569 570 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 571 int hci_can_send_command_packet_now(void){ 572 if (hci_can_send_comand_packet_transport() == 0) return 0; 573 return hci_stack->num_cmd_packets > 0u; 574 } 575 576 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 577 // check for async hci transport implementations 578 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 579 return hci_stack->hci_transport->can_send_packet_now(packet_type); 580 } 581 582 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 583 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 584 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 585 } 586 587 int hci_can_send_acl_le_packet_now(void){ 588 if (hci_stack->hci_packet_buffer_reserved) return 0; 589 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 590 } 591 592 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 593 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 594 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 595 } 596 597 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 598 if (hci_stack->hci_packet_buffer_reserved) return 0; 599 return hci_can_send_prepared_acl_packet_now(con_handle); 600 } 601 602 #ifdef ENABLE_CLASSIC 603 int hci_can_send_acl_classic_packet_now(void){ 604 if (hci_stack->hci_packet_buffer_reserved) return 0; 605 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 606 } 607 608 int hci_can_send_prepared_sco_packet_now(void){ 609 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 610 if (hci_have_usb_transport()){ 611 return hci_stack->sco_can_send_now; 612 } else { 613 return hci_number_free_sco_slots() > 0; 614 } 615 } 616 617 int hci_can_send_sco_packet_now(void){ 618 if (hci_stack->hci_packet_buffer_reserved) return 0; 619 return hci_can_send_prepared_sco_packet_now(); 620 } 621 622 void hci_request_sco_can_send_now_event(void){ 623 hci_stack->sco_waiting_for_can_send_now = 1; 624 hci_notify_if_sco_can_send_now(); 625 } 626 #endif 627 628 // used for internal checks in l2cap.c 629 int hci_is_packet_buffer_reserved(void){ 630 return hci_stack->hci_packet_buffer_reserved; 631 } 632 633 // reserves outgoing packet buffer. @returns 1 if successful 634 int hci_reserve_packet_buffer(void){ 635 if (hci_stack->hci_packet_buffer_reserved) { 636 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 637 return 0; 638 } 639 hci_stack->hci_packet_buffer_reserved = 1; 640 return 1; 641 } 642 643 void hci_release_packet_buffer(void){ 644 hci_stack->hci_packet_buffer_reserved = 0; 645 } 646 647 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 648 static int hci_transport_synchronous(void){ 649 return hci_stack->hci_transport->can_send_packet_now == NULL; 650 } 651 652 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 653 654 // 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); 655 656 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 657 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 658 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 659 max_acl_data_packet_length = hci_stack->le_data_packets_length; 660 } 661 662 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 663 if (hci_is_le_connection(connection)){ 664 max_acl_data_packet_length = connection->le_max_tx_octets; 665 } 666 #endif 667 668 log_debug("hci_send_acl_packet_fragments entered"); 669 670 int err; 671 // multiple packets could be send on a synchronous HCI transport 672 while (true){ 673 674 log_debug("hci_send_acl_packet_fragments loop entered"); 675 676 // get current data 677 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 678 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 679 int more_fragments = 0; 680 681 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 682 if (current_acl_data_packet_length > max_acl_data_packet_length){ 683 more_fragments = 1; 684 current_acl_data_packet_length = max_acl_data_packet_length; 685 } 686 687 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 688 if (acl_header_pos > 0u){ 689 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 690 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 691 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 692 } 693 694 // update header len 695 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 696 697 // count packet 698 connection->num_packets_sent++; 699 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 700 701 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 702 if (more_fragments){ 703 // update start of next fragment to send 704 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 705 } else { 706 // done 707 hci_stack->acl_fragmentation_pos = 0; 708 hci_stack->acl_fragmentation_total_size = 0; 709 } 710 711 // send packet 712 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 713 const int size = current_acl_data_packet_length + 4; 714 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 715 hci_stack->acl_fragmentation_tx_active = 1; 716 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 717 718 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 719 720 // done yet? 721 if (!more_fragments) break; 722 723 // can send more? 724 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 725 } 726 727 log_debug("hci_send_acl_packet_fragments loop over"); 728 729 // release buffer now for synchronous transport 730 if (hci_transport_synchronous()){ 731 hci_stack->acl_fragmentation_tx_active = 0; 732 hci_release_packet_buffer(); 733 hci_emit_transport_packet_sent(); 734 } 735 736 return err; 737 } 738 739 // pre: caller has reserved the packet buffer 740 int hci_send_acl_packet_buffer(int size){ 741 742 // log_info("hci_send_acl_packet_buffer size %u", size); 743 744 if (!hci_stack->hci_packet_buffer_reserved) { 745 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 746 return 0; 747 } 748 749 uint8_t * packet = hci_stack->hci_packet_buffer; 750 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 751 752 // check for free places on Bluetooth module 753 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 754 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 755 hci_release_packet_buffer(); 756 hci_emit_transport_packet_sent(); 757 return BTSTACK_ACL_BUFFERS_FULL; 758 } 759 760 hci_connection_t *connection = hci_connection_for_handle( con_handle); 761 if (!connection) { 762 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 763 hci_release_packet_buffer(); 764 hci_emit_transport_packet_sent(); 765 return 0; 766 } 767 768 #ifdef ENABLE_CLASSIC 769 hci_connection_timestamp(connection); 770 #endif 771 772 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 773 774 // setup data 775 hci_stack->acl_fragmentation_total_size = size; 776 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 777 778 return hci_send_acl_packet_fragments(connection); 779 } 780 781 #ifdef ENABLE_CLASSIC 782 // pre: caller has reserved the packet buffer 783 int hci_send_sco_packet_buffer(int size){ 784 785 // log_info("hci_send_acl_packet_buffer size %u", size); 786 787 if (!hci_stack->hci_packet_buffer_reserved) { 788 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 789 return 0; 790 } 791 792 uint8_t * packet = hci_stack->hci_packet_buffer; 793 794 // skip checks in loopback mode 795 if (!hci_stack->loopback_mode){ 796 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 797 798 // check for free places on Bluetooth module 799 if (!hci_can_send_prepared_sco_packet_now()) { 800 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 801 hci_release_packet_buffer(); 802 hci_emit_transport_packet_sent(); 803 return BTSTACK_ACL_BUFFERS_FULL; 804 } 805 806 // track send packet in connection struct 807 hci_connection_t *connection = hci_connection_for_handle( con_handle); 808 if (!connection) { 809 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 810 hci_release_packet_buffer(); 811 hci_emit_transport_packet_sent(); 812 return 0; 813 } 814 815 if (hci_have_usb_transport()){ 816 // token used 817 hci_stack->sco_can_send_now = 0; 818 } else { 819 if (hci_stack->synchronous_flow_control_enabled){ 820 connection->num_packets_sent++; 821 } else { 822 connection->sco_tx_ready--; 823 } 824 } 825 } 826 827 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 828 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 829 830 if (hci_transport_synchronous()){ 831 hci_release_packet_buffer(); 832 hci_emit_transport_packet_sent(); 833 } 834 835 return err; 836 } 837 #endif 838 839 static void acl_handler(uint8_t *packet, uint16_t size){ 840 841 // get info 842 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 843 hci_connection_t *conn = hci_connection_for_handle(con_handle); 844 uint8_t acl_flags = READ_ACL_FLAGS(packet); 845 uint16_t acl_length = READ_ACL_LENGTH(packet); 846 847 // ignore non-registered handle 848 if (!conn){ 849 log_error("acl_handler called with non-registered handle %u!" , con_handle); 850 return; 851 } 852 853 // assert packet is complete 854 if ((acl_length + 4u) != size){ 855 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 856 return; 857 } 858 859 #ifdef ENABLE_CLASSIC 860 // update idle timestamp 861 hci_connection_timestamp(conn); 862 #endif 863 864 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 865 hci_stack->host_completed_packets = 1; 866 conn->num_packets_completed++; 867 #endif 868 869 // handle different packet types 870 switch (acl_flags & 0x03u) { 871 872 case 0x01: // continuation fragment 873 874 // sanity checks 875 if (conn->acl_recombination_pos == 0u) { 876 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 877 return; 878 } 879 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 880 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 881 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 882 conn->acl_recombination_pos = 0; 883 return; 884 } 885 886 // append fragment payload (header already stored) 887 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 888 &packet[4], acl_length); 889 conn->acl_recombination_pos += acl_length; 890 891 // forward complete L2CAP packet if complete. 892 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 893 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 894 // reset recombination buffer 895 conn->acl_recombination_length = 0; 896 conn->acl_recombination_pos = 0; 897 } 898 break; 899 900 case 0x02: { // first fragment 901 902 // sanity check 903 if (conn->acl_recombination_pos) { 904 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 905 conn->acl_recombination_pos = 0; 906 } 907 908 // peek into L2CAP packet! 909 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4u)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4u); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4u); 926 conn->acl_recombination_pos = acl_length + 4u; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 929 } 930 break; 931 932 } 933 default: 934 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9u + data_length + 1u) > size) return; 1095 // setup event 1096 uint8_t event_size = 10u + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1u; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_update_advertisements_enabled_for_current_roles(void){ 1118 if (hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1133 } else { 1134 hci_stack->le_advertisements_enabled_for_current_roles = false; 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1477 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1479 break; 1480 case HCI_INIT_WRITE_SCAN_ENABLE: 1481 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1483 break; 1484 // only sent if ENABLE_SCO_OVER_HCI is defined 1485 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1487 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1488 break; 1489 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1491 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1492 break; 1493 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1494 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1495 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1496 log_info("BCM: Route SCO data via HCI transport"); 1497 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1498 break; 1499 1500 #endif 1501 #ifdef ENABLE_BLE 1502 // LE INIT 1503 case HCI_INIT_LE_READ_BUFFER_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1505 hci_send_cmd(&hci_le_read_buffer_size); 1506 break; 1507 case HCI_INIT_LE_SET_EVENT_MASK: 1508 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1509 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1510 break; 1511 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1512 // LE Supported Host = 1, Simultaneous Host = 0 1513 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1514 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1515 break; 1516 #endif 1517 1518 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1519 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_read_maximum_data_length); 1522 break; 1523 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1524 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1525 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1526 break; 1527 #endif 1528 1529 #ifdef ENABLE_LE_CENTRAL 1530 case HCI_INIT_READ_WHITE_LIST_SIZE: 1531 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1532 hci_send_cmd(&hci_le_read_white_list_size); 1533 break; 1534 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1535 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1536 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1537 break; 1538 #endif 1539 default: 1540 return; 1541 } 1542 } 1543 1544 static void hci_init_done(void){ 1545 // done. tell the app 1546 log_info("hci_init_done -> HCI_STATE_WORKING"); 1547 hci_stack->state = HCI_STATE_WORKING; 1548 hci_emit_state(); 1549 hci_run(); 1550 } 1551 1552 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1553 bool command_completed = false; 1554 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1555 uint16_t opcode = little_endian_read_16(packet,3); 1556 if (opcode == hci_stack->last_cmd_opcode){ 1557 command_completed = true; 1558 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1559 } else { 1560 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1561 } 1562 } 1563 1564 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1565 uint8_t status = packet[2]; 1566 uint16_t opcode = little_endian_read_16(packet,4); 1567 if (opcode == hci_stack->last_cmd_opcode){ 1568 if (status){ 1569 command_completed = true; 1570 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1571 } else { 1572 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1573 } 1574 } else { 1575 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1576 } 1577 } 1578 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1579 // Vendor == CSR 1580 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1581 // TODO: track actual command 1582 command_completed = true; 1583 } 1584 1585 // Vendor == Toshiba 1586 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1587 // TODO: track actual command 1588 command_completed = true; 1589 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1590 hci_stack->num_cmd_packets = 1; 1591 } 1592 #endif 1593 1594 return command_completed; 1595 } 1596 1597 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1598 1599 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1600 1601 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1602 1603 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1604 1605 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1606 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1607 // 1608 // HCI Reset 1609 // Timeout 100 ms 1610 // HCI Reset 1611 // Command Complete Reset 1612 // HCI Read Local Version Information 1613 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1614 // hang... 1615 // 1616 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1617 if (!command_completed 1618 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1619 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1620 1621 uint16_t opcode = little_endian_read_16(packet,3); 1622 if (opcode == hci_reset.opcode){ 1623 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1624 return; 1625 } 1626 } 1627 1628 // CSR & H5 1629 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1630 if (!command_completed 1631 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1632 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1633 1634 uint16_t opcode = little_endian_read_16(packet,3); 1635 if (opcode == hci_reset.opcode){ 1636 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1637 return; 1638 } 1639 } 1640 1641 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1642 // fix: Correct substate and behave as command below 1643 if (command_completed){ 1644 switch (hci_stack->substate){ 1645 case HCI_INIT_SEND_RESET: 1646 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1647 break; 1648 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1649 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1650 break; 1651 default: 1652 break; 1653 } 1654 } 1655 1656 #endif 1657 1658 if (!command_completed) return; 1659 1660 bool need_baud_change = false; 1661 bool need_addr_change = false; 1662 1663 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1664 need_baud_change = hci_stack->config 1665 && hci_stack->chipset 1666 && hci_stack->chipset->set_baudrate_command 1667 && hci_stack->hci_transport->set_baudrate 1668 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1669 1670 need_addr_change = hci_stack->custom_bd_addr_set 1671 && hci_stack->chipset 1672 && hci_stack->chipset->set_bd_addr_command; 1673 #endif 1674 1675 switch(hci_stack->substate){ 1676 1677 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1678 case HCI_INIT_SEND_RESET: 1679 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1680 // fix: just correct substate and behave as command below 1681 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1682 btstack_run_loop_remove_timer(&hci_stack->timeout); 1683 break; 1684 case HCI_INIT_W4_SEND_RESET: 1685 btstack_run_loop_remove_timer(&hci_stack->timeout); 1686 break; 1687 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1688 log_info("Received local name, need baud change %d", (int) need_baud_change); 1689 if (need_baud_change){ 1690 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1691 return; 1692 } 1693 // skip baud change 1694 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1695 return; 1696 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1697 // for STLC2500D, baud rate change already happened. 1698 // for others, baud rate gets changed now 1699 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1700 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1701 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1702 hci_stack->hci_transport->set_baudrate(baud_rate); 1703 } 1704 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1705 return; 1706 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1707 btstack_run_loop_remove_timer(&hci_stack->timeout); 1708 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1709 return; 1710 case HCI_INIT_W4_CUSTOM_INIT: 1711 // repeat custom init 1712 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1713 return; 1714 #else 1715 case HCI_INIT_W4_SEND_RESET: 1716 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1717 return ; 1718 #endif 1719 1720 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1721 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1722 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1723 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1724 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1725 return; 1726 } 1727 if (need_addr_change){ 1728 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1729 return; 1730 } 1731 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1732 return; 1733 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1734 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1735 if (need_baud_change){ 1736 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1737 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1738 hci_stack->hci_transport->set_baudrate(baud_rate); 1739 } 1740 if (need_addr_change){ 1741 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1742 return; 1743 } 1744 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1745 return; 1746 case HCI_INIT_W4_SET_BD_ADDR: 1747 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1748 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1749 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1750 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1751 return; 1752 } 1753 // skipping st warm boot 1754 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1755 return; 1756 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1757 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1758 return; 1759 #endif 1760 case HCI_INIT_W4_READ_BD_ADDR: 1761 // only read buffer size if supported 1762 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1763 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1764 return; 1765 } 1766 // skipping read buffer size 1767 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1768 return; 1769 case HCI_INIT_W4_SET_EVENT_MASK: 1770 // skip Classic init commands for LE only chipsets 1771 if (!hci_classic_supported()){ 1772 #ifdef ENABLE_BLE 1773 if (hci_le_supported()){ 1774 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1775 return; 1776 } 1777 #endif 1778 log_error("Neither BR/EDR nor LE supported"); 1779 hci_init_done(); 1780 return; 1781 } 1782 if (!gap_ssp_supported()){ 1783 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1784 return; 1785 } 1786 break; 1787 #ifdef ENABLE_BLE 1788 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1789 // skip write le host if not supported (e.g. on LE only EM9301) 1790 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1791 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1792 return; 1793 1794 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1795 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1796 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1797 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1798 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1799 return; 1800 } 1801 // explicit fall through to reduce repetitions 1802 1803 #ifdef ENABLE_LE_CENTRAL 1804 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1805 #else 1806 hci_init_done(); 1807 #endif 1808 return; 1809 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1810 1811 #endif /* ENABLE_BLE */ 1812 1813 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1814 // skip write secure connections host support if not supported or disabled 1815 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1816 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1817 return; 1818 } 1819 break; 1820 1821 #ifdef ENABLE_SCO_OVER_HCI 1822 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1823 // skip write synchronous flow control if not supported 1824 if (hci_stack->local_supported_commands[0] & 0x04) break; 1825 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1826 1827 /* fall through */ 1828 1829 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1830 // skip write default erroneous data reporting if not supported 1831 if (hci_stack->local_supported_commands[0] & 0x08) break; 1832 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1833 1834 /* fall through */ 1835 1836 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1837 // skip bcm set sco pcm config on non-Broadcom chipsets 1838 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1839 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1840 1841 /* fall through */ 1842 1843 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1844 if (!hci_le_supported()){ 1845 // SKIP LE init for Classic only configuration 1846 hci_init_done(); 1847 return; 1848 } 1849 break; 1850 1851 #else /* !ENABLE_SCO_OVER_HCI */ 1852 1853 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1854 #ifdef ENABLE_BLE 1855 if (hci_le_supported()){ 1856 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1857 return; 1858 } 1859 #endif 1860 // SKIP LE init for Classic only configuration 1861 hci_init_done(); 1862 return; 1863 #endif /* ENABLE_SCO_OVER_HCI */ 1864 1865 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1866 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1867 // Response to command before init done state -> init done 1868 case (HCI_INIT_DONE-1): 1869 hci_init_done(); 1870 return; 1871 #endif 1872 1873 default: 1874 break; 1875 } 1876 hci_initializing_next_state(); 1877 } 1878 1879 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1880 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1881 bd_addr_t bd_address; 1882 (void)memcpy(&bd_address, conn->address, 6); 1883 1884 #ifdef ENABLE_CLASSIC 1885 // cache needed data 1886 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1887 #endif 1888 1889 // connection failed, remove entry 1890 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1891 btstack_memory_hci_connection_free( conn ); 1892 1893 #ifdef ENABLE_CLASSIC 1894 // notify client if dedicated bonding 1895 if (notify_dedicated_bonding_failed){ 1896 log_info("hci notify_dedicated_bonding_failed"); 1897 hci_emit_dedicated_bonding_result(bd_address, status); 1898 } 1899 1900 // if authentication error, also delete link key 1901 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1902 gap_drop_link_key_for_bd_addr(bd_address); 1903 } 1904 #else 1905 UNUSED(status); 1906 #endif 1907 } 1908 1909 #ifdef ENABLE_CLASSIC 1910 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1911 // SSP Controller 1912 if (features[6] & (1 << 3)){ 1913 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1914 } 1915 // eSCO 1916 if (features[3] & (1<<7)){ 1917 conn->remote_supported_features[0] |= 1; 1918 } 1919 // Extended features 1920 if (features[7] & (1<<7)){ 1921 conn->remote_supported_features[0] |= 2; 1922 } 1923 } 1924 1925 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1926 // SSP Host 1927 if (features[0] & (1 << 0)){ 1928 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1929 } 1930 // SC Host 1931 if (features[0] & (1 << 3)){ 1932 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1933 } 1934 } 1935 1936 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1937 // SC Controller 1938 if (features[1] & (1 << 0)){ 1939 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1940 } 1941 } 1942 1943 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1944 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1945 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1946 if (conn->bonding_flags & BONDING_DEDICATED){ 1947 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1948 } 1949 } 1950 #endif 1951 1952 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1953 // handle BT initialization 1954 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1955 hci_initializing_event_handler(packet, size); 1956 } 1957 1958 // help with BT sleep 1959 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1960 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1961 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1962 hci_initializing_next_state(); 1963 } 1964 } 1965 1966 #ifdef ENABLE_CLASSIC 1967 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1968 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1969 conn->encryption_key_size = encryption_key_size; 1970 1971 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1972 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1973 return; 1974 } 1975 1976 // Request Authentication if not already done 1977 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1978 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1979 } 1980 #endif 1981 1982 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1983 UNUSED(size); 1984 1985 uint16_t manufacturer; 1986 #ifdef ENABLE_CLASSIC 1987 hci_con_handle_t handle; 1988 hci_connection_t * conn; 1989 uint8_t status; 1990 #endif 1991 // get num cmd packets - limit to 1 to reduce complexity 1992 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1993 1994 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1995 switch (opcode){ 1996 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1997 if (packet[5]) break; 1998 // terminate, name 248 chars 1999 packet[6+248] = 0; 2000 log_info("local name: %s", &packet[6]); 2001 break; 2002 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2003 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2004 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2005 uint16_t acl_len = little_endian_read_16(packet, 6); 2006 uint16_t sco_len = packet[8]; 2007 2008 // determine usable ACL/SCO payload size 2009 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2010 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2011 2012 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2013 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2014 2015 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2016 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2017 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2018 } 2019 break; 2020 case HCI_OPCODE_HCI_READ_RSSI: 2021 if (packet[5] == ERROR_CODE_SUCCESS){ 2022 uint8_t event[5]; 2023 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2024 event[1] = 3; 2025 (void)memcpy(&event[2], &packet[6], 3); 2026 hci_emit_event(event, sizeof(event), 1); 2027 } 2028 break; 2029 #ifdef ENABLE_BLE 2030 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2031 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2032 hci_stack->le_acl_packets_total_num = packet[8]; 2033 // determine usable ACL payload size 2034 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2035 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2036 } 2037 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2038 break; 2039 #endif 2040 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2041 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2042 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2043 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2044 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2045 break; 2046 #endif 2047 #ifdef ENABLE_LE_CENTRAL 2048 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2049 hci_stack->le_whitelist_capacity = packet[6]; 2050 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2051 break; 2052 #endif 2053 case HCI_OPCODE_HCI_READ_BD_ADDR: 2054 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2055 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2056 #ifdef ENABLE_CLASSIC 2057 if (hci_stack->link_key_db){ 2058 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2059 } 2060 #endif 2061 break; 2062 #ifdef ENABLE_CLASSIC 2063 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2064 hci_emit_discoverable_enabled(hci_stack->discoverable); 2065 break; 2066 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2067 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2068 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2069 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2070 hci_emit_event(event, sizeof(event), 1); 2071 } 2072 break; 2073 #endif 2074 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2075 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2076 2077 #ifdef ENABLE_CLASSIC 2078 // determine usable ACL packet types based on host buffer size and supported features 2079 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2080 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2081 #endif 2082 // Classic/LE 2083 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2084 break; 2085 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2086 manufacturer = little_endian_read_16(packet, 10); 2087 // map Cypress to Broadcom 2088 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2089 log_info("Treat Cypress as Broadcom"); 2090 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2091 little_endian_store_16(packet, 10, manufacturer); 2092 } 2093 hci_stack->manufacturer = manufacturer; 2094 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2095 break; 2096 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2097 hci_stack->local_supported_commands[0] = 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2102 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2103 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2104 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2106 hci_stack->local_supported_commands[1] = 2107 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2108 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2109 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u); // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2110 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2111 break; 2112 #ifdef ENABLE_CLASSIC 2113 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2114 if (packet[5]) return; 2115 hci_stack->synchronous_flow_control_enabled = 1; 2116 break; 2117 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2118 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2119 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2120 conn = hci_connection_for_handle(handle); 2121 if (conn != NULL) { 2122 uint8_t key_size = 0; 2123 if (status == 0){ 2124 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2125 log_info("Handle %04x key Size: %u", handle, key_size); 2126 } else { 2127 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2128 } 2129 hci_handle_read_encryption_key_size_complete(conn, key_size); 2130 } 2131 break; 2132 #endif 2133 default: 2134 break; 2135 } 2136 } 2137 2138 #ifdef ENABLE_BLE 2139 static void event_handle_le_connection_complete(const uint8_t * packet){ 2140 bd_addr_t addr; 2141 bd_addr_type_t addr_type; 2142 hci_connection_t * conn; 2143 2144 // Connection management 2145 reverse_bd_addr(&packet[8], addr); 2146 addr_type = (bd_addr_type_t)packet[7]; 2147 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2148 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2149 2150 #ifdef ENABLE_LE_CENTRAL 2151 // handle error: error is reported only to the initiator -> outgoing connection 2152 if (packet[3]){ 2153 2154 // handle cancelled outgoing connection 2155 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2156 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2157 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2158 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2159 // whitelist connect 2160 if (hci_is_le_connection_type(addr_type)){ 2161 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2162 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2163 } 2164 // get outgoing connection conn struct for direct connect 2165 conn = gap_get_outgoing_connection(); 2166 } 2167 2168 // outgoing le connection establishment is done 2169 if (conn){ 2170 // remove entry 2171 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2172 btstack_memory_hci_connection_free( conn ); 2173 } 2174 return; 2175 } 2176 #endif 2177 2178 // on success, both hosts receive connection complete event 2179 if (packet[6] == HCI_ROLE_MASTER){ 2180 #ifdef ENABLE_LE_CENTRAL 2181 // if we're master on an le connection, it was an outgoing connection and we're done with it 2182 // note: no hci_connection_t object exists yet for connect with whitelist 2183 if (hci_is_le_connection_type(addr_type)){ 2184 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2185 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2186 } 2187 #endif 2188 } else { 2189 #ifdef ENABLE_LE_PERIPHERAL 2190 // if we're slave, it was an incoming connection, advertisements have stopped 2191 hci_stack->le_advertisements_active = false; 2192 #endif 2193 } 2194 2195 // LE connections are auto-accepted, so just create a connection if there isn't one already 2196 if (!conn){ 2197 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2198 } 2199 2200 // no memory, sorry. 2201 if (!conn){ 2202 return; 2203 } 2204 2205 conn->state = OPEN; 2206 conn->role = packet[6]; 2207 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2208 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2209 2210 #ifdef ENABLE_LE_PERIPHERAL 2211 if (packet[6] == HCI_ROLE_SLAVE){ 2212 hci_update_advertisements_enabled_for_current_roles(); 2213 } 2214 #endif 2215 2216 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2217 2218 // restart timer 2219 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2220 // btstack_run_loop_add_timer(&conn->timeout); 2221 2222 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2223 2224 hci_emit_nr_connections_changed(); 2225 } 2226 #endif 2227 2228 static void event_handler(uint8_t *packet, uint16_t size){ 2229 2230 uint16_t event_length = packet[1]; 2231 2232 // assert packet is complete 2233 if (size != (event_length + 2u)){ 2234 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2235 return; 2236 } 2237 2238 bd_addr_t addr; 2239 bd_addr_type_t addr_type; 2240 hci_con_handle_t handle; 2241 hci_connection_t * conn; 2242 int i; 2243 int create_connection_cmd; 2244 2245 #ifdef ENABLE_CLASSIC 2246 uint8_t link_type; 2247 #endif 2248 2249 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2250 2251 switch (hci_event_packet_get_type(packet)) { 2252 2253 case HCI_EVENT_COMMAND_COMPLETE: 2254 handle_command_complete_event(packet, size); 2255 break; 2256 2257 case HCI_EVENT_COMMAND_STATUS: 2258 // get num cmd packets - limit to 1 to reduce complexity 2259 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2260 2261 // check command status to detected failed outgoing connections 2262 create_connection_cmd = 0; 2263 #ifdef ENABLE_CLASSIC 2264 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2265 create_connection_cmd = 1; 2266 } 2267 #endif 2268 #ifdef ENABLE_LE_CENTRAL 2269 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2270 create_connection_cmd = 1; 2271 } 2272 #endif 2273 if (create_connection_cmd) { 2274 uint8_t status = hci_event_command_status_get_status(packet); 2275 addr_type = hci_stack->outgoing_addr_type; 2276 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2277 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2278 2279 // reset outgoing address info 2280 memset(hci_stack->outgoing_addr, 0, 6); 2281 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2282 2283 // on error 2284 if (status != ERROR_CODE_SUCCESS){ 2285 #ifdef ENABLE_LE_CENTRAL 2286 if (hci_is_le_connection_type(addr_type)){ 2287 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2288 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2289 } 2290 #endif 2291 // error => outgoing connection failed 2292 if (conn != NULL){ 2293 hci_handle_connection_failed(conn, status); 2294 } 2295 } 2296 } 2297 break; 2298 2299 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2300 if (size < 3) return; 2301 uint16_t num_handles = packet[2]; 2302 if (size != (3u + num_handles * 4u)) return; 2303 uint16_t offset = 3; 2304 for (i=0; i<num_handles;i++){ 2305 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2306 offset += 2u; 2307 uint16_t num_packets = little_endian_read_16(packet, offset); 2308 offset += 2u; 2309 2310 conn = hci_connection_for_handle(handle); 2311 if (!conn){ 2312 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2313 continue; 2314 } 2315 2316 if (conn->num_packets_sent >= num_packets){ 2317 conn->num_packets_sent -= num_packets; 2318 } else { 2319 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2320 conn->num_packets_sent = 0; 2321 } 2322 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2323 2324 #ifdef ENABLE_CLASSIC 2325 // For SCO, we do the can_send_now_check here 2326 hci_notify_if_sco_can_send_now(); 2327 #endif 2328 } 2329 break; 2330 } 2331 2332 #ifdef ENABLE_CLASSIC 2333 case HCI_EVENT_INQUIRY_COMPLETE: 2334 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2335 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2336 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2337 hci_emit_event(event, sizeof(event), 1); 2338 } 2339 break; 2340 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2341 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2342 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2343 } 2344 break; 2345 case HCI_EVENT_CONNECTION_REQUEST: 2346 reverse_bd_addr(&packet[2], addr); 2347 if (hci_stack->gap_classic_accept_callback != NULL){ 2348 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2349 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2350 bd_addr_copy(hci_stack->decline_addr, addr); 2351 break; 2352 } 2353 } 2354 2355 // TODO: eval COD 8-10 2356 link_type = packet[11]; 2357 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2358 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2359 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2360 if (!conn) { 2361 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2362 } 2363 if (!conn) { 2364 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2365 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2366 bd_addr_copy(hci_stack->decline_addr, addr); 2367 break; 2368 } 2369 conn->role = HCI_ROLE_SLAVE; 2370 conn->state = RECEIVED_CONNECTION_REQUEST; 2371 // store info about eSCO 2372 if (link_type == 0x02){ 2373 conn->remote_supported_features[0] |= 1; 2374 } 2375 hci_run(); 2376 break; 2377 2378 case HCI_EVENT_CONNECTION_COMPLETE: 2379 // Connection management 2380 reverse_bd_addr(&packet[5], addr); 2381 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2382 addr_type = BD_ADDR_TYPE_ACL; 2383 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2384 if (conn) { 2385 if (!packet[2]){ 2386 conn->state = OPEN; 2387 conn->con_handle = little_endian_read_16(packet, 3); 2388 2389 // queue get remote feature 2390 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2391 2392 // queue set supervision timeout if we're master 2393 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2394 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2395 } 2396 2397 // restart timer 2398 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2399 btstack_run_loop_add_timer(&conn->timeout); 2400 2401 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2402 2403 hci_emit_nr_connections_changed(); 2404 } else { 2405 // connection failed 2406 hci_handle_connection_failed(conn, packet[2]); 2407 } 2408 } 2409 break; 2410 2411 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2412 reverse_bd_addr(&packet[5], addr); 2413 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2414 if (packet[2]){ 2415 // connection failed 2416 break; 2417 } 2418 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2419 if (!conn) { 2420 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2421 } 2422 if (!conn) { 2423 break; 2424 } 2425 conn->state = OPEN; 2426 conn->con_handle = little_endian_read_16(packet, 3); 2427 2428 #ifdef ENABLE_SCO_OVER_HCI 2429 // update SCO 2430 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2431 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2432 } 2433 // trigger can send now 2434 if (hci_have_usb_transport()){ 2435 hci_stack->sco_can_send_now = 1; 2436 } 2437 #endif 2438 break; 2439 2440 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2441 handle = little_endian_read_16(packet, 3); 2442 conn = hci_connection_for_handle(handle); 2443 if (!conn) break; 2444 if (!packet[2]){ 2445 const uint8_t * features = &packet[5]; 2446 hci_handle_remote_features_page_0(conn, features); 2447 2448 // read extended features if possible 2449 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2450 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2451 break; 2452 } 2453 } 2454 hci_handle_remote_features_received(conn); 2455 break; 2456 2457 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2458 handle = little_endian_read_16(packet, 3); 2459 conn = hci_connection_for_handle(handle); 2460 if (!conn) break; 2461 // status = ok, page = 1 2462 if (!packet[2]) { 2463 uint8_t page_number = packet[5]; 2464 uint8_t maximum_page_number = packet[6]; 2465 const uint8_t * features = &packet[7]; 2466 bool done = false; 2467 switch (page_number){ 2468 case 1: 2469 hci_handle_remote_features_page_1(conn, features); 2470 if (maximum_page_number >= 2){ 2471 // get Secure Connections (Controller) from Page 2 if available 2472 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2473 } else { 2474 // otherwise, assume SC (Controller) == SC (Host) 2475 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2476 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2477 } 2478 done = true; 2479 } 2480 break; 2481 case 2: 2482 hci_handle_remote_features_page_2(conn, features); 2483 done = true; 2484 break; 2485 default: 2486 break; 2487 } 2488 if (!done) break; 2489 } 2490 hci_handle_remote_features_received(conn); 2491 break; 2492 2493 case HCI_EVENT_LINK_KEY_REQUEST: 2494 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2495 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2496 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2497 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2498 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2499 hci_run(); 2500 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2501 return; 2502 2503 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2504 reverse_bd_addr(&packet[2], addr); 2505 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2506 if (!conn) break; 2507 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2508 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2509 // Change Connection Encryption keeps link key type 2510 if (link_key_type != CHANGED_COMBINATION_KEY){ 2511 conn->link_key_type = link_key_type; 2512 } 2513 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2514 // still forward event to allow dismiss of pairing dialog 2515 break; 2516 } 2517 2518 case HCI_EVENT_PIN_CODE_REQUEST: 2519 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2520 // non-bondable mode: pin code negative reply will be sent 2521 if (!hci_stack->bondable){ 2522 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2523 hci_run(); 2524 return; 2525 } 2526 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2527 if (!hci_stack->link_key_db) break; 2528 hci_event_pin_code_request_get_bd_addr(packet, addr); 2529 hci_stack->link_key_db->delete_link_key(addr); 2530 break; 2531 2532 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2533 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2534 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2535 break; 2536 2537 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2538 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2539 if (!hci_stack->ssp_auto_accept) break; 2540 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2541 break; 2542 2543 case HCI_EVENT_USER_PASSKEY_REQUEST: 2544 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2545 if (!hci_stack->ssp_auto_accept) break; 2546 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2547 break; 2548 case HCI_EVENT_MODE_CHANGE: 2549 handle = hci_event_mode_change_get_handle(packet); 2550 conn = hci_connection_for_handle(handle); 2551 if (!conn) break; 2552 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2553 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2554 break; 2555 #endif 2556 2557 case HCI_EVENT_ENCRYPTION_CHANGE: 2558 handle = hci_event_encryption_change_get_connection_handle(packet); 2559 conn = hci_connection_for_handle(handle); 2560 if (!conn) break; 2561 if (hci_event_encryption_change_get_status(packet) == 0u) { 2562 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2563 if (encryption_enabled){ 2564 if (hci_is_le_connection(conn)){ 2565 // For LE, we accept connection as encrypted 2566 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2567 } 2568 #ifdef ENABLE_CLASSIC 2569 else { 2570 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2571 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2572 bool connected_uses_aes_ccm = encryption_enabled == 2; 2573 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2574 log_info("SC during pairing, but only E0 now -> abort"); 2575 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2576 break; 2577 } 2578 2579 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2580 if (connected_uses_aes_ccm){ 2581 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2582 } 2583 2584 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2585 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2586 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2587 } else { 2588 // if not, pretend everything is perfect 2589 hci_handle_read_encryption_key_size_complete(conn, 16); 2590 } 2591 } 2592 #endif 2593 } else { 2594 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2595 } 2596 } 2597 2598 break; 2599 2600 #ifdef ENABLE_CLASSIC 2601 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2602 handle = hci_event_authentication_complete_get_connection_handle(packet); 2603 conn = hci_connection_for_handle(handle); 2604 if (!conn) break; 2605 2606 // ignore authentication event if we didn't request it 2607 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2608 2609 // dedicated bonding: send result and disconnect 2610 if (conn->bonding_flags & BONDING_DEDICATED){ 2611 conn->bonding_flags &= ~BONDING_DEDICATED; 2612 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2613 conn->bonding_status = packet[2]; 2614 break; 2615 } 2616 2617 // authenticated only if auth status == 0 2618 if (hci_event_authentication_complete_get_status(packet) == 0){ 2619 // authenticated 2620 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2621 2622 // If link key sufficient for requested security and not already encrypted, start encryption 2623 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2624 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2625 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2626 break; 2627 } 2628 } 2629 2630 // emit updated security level 2631 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2632 break; 2633 #endif 2634 2635 // HCI_EVENT_DISCONNECTION_COMPLETE 2636 // has been split, to first notify stack before shutting connection down 2637 // see end of function, too. 2638 case HCI_EVENT_DISCONNECTION_COMPLETE: 2639 if (packet[2]) break; // status != 0 2640 handle = little_endian_read_16(packet, 3); 2641 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2642 if (hci_stack->acl_fragmentation_total_size > 0u) { 2643 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2644 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2645 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2646 hci_stack->acl_fragmentation_total_size = 0; 2647 hci_stack->acl_fragmentation_pos = 0; 2648 if (release_buffer){ 2649 hci_release_packet_buffer(); 2650 } 2651 } 2652 } 2653 2654 conn = hci_connection_for_handle(handle); 2655 if (!conn) break; 2656 // mark connection for shutdown 2657 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2658 2659 // emit dedicatd bonding event 2660 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2661 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2662 } 2663 2664 #ifdef ENABLE_BLE 2665 #ifdef ENABLE_LE_PERIPHERAL 2666 // re-enable advertisements for le connections if active 2667 if (hci_is_le_connection(conn)){ 2668 hci_update_advertisements_enabled_for_current_roles(); 2669 } 2670 #endif 2671 #endif 2672 break; 2673 2674 case HCI_EVENT_HARDWARE_ERROR: 2675 log_error("Hardware Error: 0x%02x", packet[2]); 2676 if (hci_stack->hardware_error_callback){ 2677 (*hci_stack->hardware_error_callback)(packet[2]); 2678 } else { 2679 // if no special requests, just reboot stack 2680 hci_power_control_off(); 2681 hci_power_control_on(); 2682 } 2683 break; 2684 2685 #ifdef ENABLE_CLASSIC 2686 case HCI_EVENT_ROLE_CHANGE: 2687 if (packet[2]) break; // status != 0 2688 reverse_bd_addr(&packet[3], addr); 2689 addr_type = BD_ADDR_TYPE_ACL; 2690 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2691 if (!conn) break; 2692 conn->role = packet[9]; 2693 break; 2694 #endif 2695 2696 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2697 // release packet buffer only for asynchronous transport and if there are not further fragements 2698 if (hci_transport_synchronous()) { 2699 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2700 return; // instead of break: to avoid re-entering hci_run() 2701 } 2702 hci_stack->acl_fragmentation_tx_active = 0; 2703 if (hci_stack->acl_fragmentation_total_size) break; 2704 hci_release_packet_buffer(); 2705 2706 // L2CAP receives this event via the hci_emit_event below 2707 2708 #ifdef ENABLE_CLASSIC 2709 // For SCO, we do the can_send_now_check here 2710 hci_notify_if_sco_can_send_now(); 2711 #endif 2712 break; 2713 2714 #ifdef ENABLE_CLASSIC 2715 case HCI_EVENT_SCO_CAN_SEND_NOW: 2716 // For SCO, we do the can_send_now_check here 2717 hci_stack->sco_can_send_now = 1; 2718 hci_notify_if_sco_can_send_now(); 2719 return; 2720 2721 // explode inquriy results for easier consumption 2722 case HCI_EVENT_INQUIRY_RESULT: 2723 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2724 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2725 gap_inquiry_explode(packet, size); 2726 break; 2727 #endif 2728 2729 #ifdef ENABLE_BLE 2730 case HCI_EVENT_LE_META: 2731 switch (packet[2]){ 2732 #ifdef ENABLE_LE_CENTRAL 2733 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2734 // log_info("advertising report received"); 2735 if (!hci_stack->le_scanning_enabled) break; 2736 le_handle_advertisement_report(packet, size); 2737 break; 2738 #endif 2739 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2740 event_handle_le_connection_complete(packet); 2741 break; 2742 2743 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2744 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2745 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2746 conn = hci_connection_for_handle(handle); 2747 if (!conn) break; 2748 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2749 break; 2750 2751 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2752 // connection 2753 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2754 conn = hci_connection_for_handle(handle); 2755 if (conn) { 2756 // read arguments 2757 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2758 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2759 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2760 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2761 2762 // validate against current connection parameter range 2763 le_connection_parameter_range_t existing_range; 2764 gap_get_connection_parameter_range(&existing_range); 2765 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2766 if (update_parameter){ 2767 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2768 conn->le_conn_interval_min = le_conn_interval_min; 2769 conn->le_conn_interval_max = le_conn_interval_max; 2770 conn->le_conn_latency = le_conn_latency; 2771 conn->le_supervision_timeout = le_supervision_timeout; 2772 } else { 2773 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2774 } 2775 } 2776 break; 2777 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2778 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2779 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2780 conn = hci_connection_for_handle(handle); 2781 if (conn) { 2782 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2783 } 2784 break; 2785 #endif 2786 default: 2787 break; 2788 } 2789 break; 2790 #endif 2791 case HCI_EVENT_VENDOR_SPECIFIC: 2792 // Vendor specific commands often create vendor specific event instead of num completed packets 2793 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2794 switch (hci_stack->manufacturer){ 2795 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2796 hci_stack->num_cmd_packets = 1; 2797 break; 2798 default: 2799 break; 2800 } 2801 break; 2802 default: 2803 break; 2804 } 2805 2806 handle_event_for_current_stack_state(packet, size); 2807 2808 // notify upper stack 2809 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2810 2811 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2812 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2813 handle = little_endian_read_16(packet, 3); 2814 hci_connection_t * aConn = hci_connection_for_handle(handle); 2815 // discard connection if app did not trigger a reconnect in the event handler 2816 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2817 hci_shutdown_connection(aConn); 2818 } 2819 } 2820 2821 // execute main loop 2822 hci_run(); 2823 } 2824 2825 #ifdef ENABLE_CLASSIC 2826 2827 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2828 static void sco_schedule_tx(hci_connection_t * conn); 2829 2830 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2831 log_debug("SCO TX Timeout"); 2832 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2833 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2834 if (!conn) return; 2835 2836 // trigger send 2837 conn->sco_tx_ready = 1; 2838 // extra packet if CVSD but SCO buffer is too short 2839 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2840 conn->sco_tx_ready++; 2841 } 2842 hci_notify_if_sco_can_send_now(); 2843 } 2844 2845 2846 #define SCO_TX_AFTER_RX_MS (6) 2847 2848 static void sco_schedule_tx(hci_connection_t * conn){ 2849 2850 uint32_t now = btstack_run_loop_get_time_ms(); 2851 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2852 int time_delta_ms = sco_tx_ms - now; 2853 2854 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2855 2856 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2857 btstack_run_loop_set_timer(timer, time_delta_ms); 2858 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2859 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2860 btstack_run_loop_add_timer(timer); 2861 } 2862 2863 static void sco_handler(uint8_t * packet, uint16_t size){ 2864 // lookup connection struct 2865 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2866 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2867 if (!conn) return; 2868 2869 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2870 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2871 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2872 packet[2] = 0x3c; 2873 memmove(&packet[3], &packet[23], 63); 2874 size = 63; 2875 } 2876 } 2877 2878 if (hci_have_usb_transport()){ 2879 // Nothing to do 2880 } else { 2881 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 2882 if (hci_stack->synchronous_flow_control_enabled == 0){ 2883 uint32_t now = btstack_run_loop_get_time_ms(); 2884 2885 if (!conn->sco_rx_valid){ 2886 // ignore first 10 packets 2887 conn->sco_rx_count++; 2888 // log_debug("sco rx count %u", conn->sco_rx_count); 2889 if (conn->sco_rx_count == 10) { 2890 // use first timestamp as is and pretent it just started 2891 conn->sco_rx_ms = now; 2892 conn->sco_rx_valid = 1; 2893 conn->sco_rx_count = 0; 2894 sco_schedule_tx(conn); 2895 } 2896 } else { 2897 // track expected arrival timme 2898 conn->sco_rx_count++; 2899 conn->sco_rx_ms += 7; 2900 int delta = (int32_t) (now - conn->sco_rx_ms); 2901 if (delta > 0){ 2902 conn->sco_rx_ms++; 2903 } 2904 // log_debug("sco rx %u", conn->sco_rx_ms); 2905 sco_schedule_tx(conn); 2906 } 2907 } 2908 } 2909 // deliver to app 2910 if (hci_stack->sco_packet_handler) { 2911 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2912 } 2913 2914 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2915 conn->num_packets_completed++; 2916 hci_stack->host_completed_packets = 1; 2917 hci_run(); 2918 #endif 2919 } 2920 #endif 2921 2922 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2923 hci_dump_packet(packet_type, 1, packet, size); 2924 switch (packet_type) { 2925 case HCI_EVENT_PACKET: 2926 event_handler(packet, size); 2927 break; 2928 case HCI_ACL_DATA_PACKET: 2929 acl_handler(packet, size); 2930 break; 2931 #ifdef ENABLE_CLASSIC 2932 case HCI_SCO_DATA_PACKET: 2933 sco_handler(packet, size); 2934 break; 2935 #endif 2936 default: 2937 break; 2938 } 2939 } 2940 2941 /** 2942 * @brief Add event packet handler. 2943 */ 2944 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2945 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2946 } 2947 2948 2949 /** Register HCI packet handlers */ 2950 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2951 hci_stack->acl_packet_handler = handler; 2952 } 2953 2954 #ifdef ENABLE_CLASSIC 2955 /** 2956 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2957 */ 2958 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2959 hci_stack->sco_packet_handler = handler; 2960 } 2961 #endif 2962 2963 static void hci_state_reset(void){ 2964 // no connections yet 2965 hci_stack->connections = NULL; 2966 2967 // keep discoverable/connectable as this has been requested by the client(s) 2968 // hci_stack->discoverable = 0; 2969 // hci_stack->connectable = 0; 2970 // hci_stack->bondable = 1; 2971 // hci_stack->own_addr_type = 0; 2972 2973 // buffer is free 2974 hci_stack->hci_packet_buffer_reserved = 0; 2975 2976 // no pending cmds 2977 hci_stack->decline_reason = 0; 2978 hci_stack->new_scan_enable_value = 0xff; 2979 2980 // LE 2981 #ifdef ENABLE_BLE 2982 memset(hci_stack->le_random_address, 0, 6); 2983 hci_stack->le_random_address_set = 0; 2984 #endif 2985 #ifdef ENABLE_LE_CENTRAL 2986 hci_stack->le_scanning_active = 0; 2987 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2988 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2989 hci_stack->le_whitelist_capacity = 0; 2990 #endif 2991 } 2992 2993 #ifdef ENABLE_CLASSIC 2994 /** 2995 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2996 */ 2997 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2998 // store and open remote device db 2999 hci_stack->link_key_db = link_key_db; 3000 if (hci_stack->link_key_db) { 3001 hci_stack->link_key_db->open(); 3002 } 3003 } 3004 #endif 3005 3006 void hci_init(const hci_transport_t *transport, const void *config){ 3007 3008 #ifdef HAVE_MALLOC 3009 if (!hci_stack) { 3010 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3011 } 3012 #else 3013 hci_stack = &hci_stack_static; 3014 #endif 3015 memset(hci_stack, 0, sizeof(hci_stack_t)); 3016 3017 // reference to use transport layer implementation 3018 hci_stack->hci_transport = transport; 3019 3020 // reference to used config 3021 hci_stack->config = config; 3022 3023 // setup pointer for outgoing packet buffer 3024 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3025 3026 // max acl payload size defined in config.h 3027 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3028 3029 // register packet handlers with transport 3030 transport->register_packet_handler(&packet_handler); 3031 3032 hci_stack->state = HCI_STATE_OFF; 3033 3034 // class of device 3035 hci_stack->class_of_device = 0x007a020c; // Smartphone 3036 3037 // bondable by default 3038 hci_stack->bondable = 1; 3039 3040 #ifdef ENABLE_CLASSIC 3041 // classic name 3042 hci_stack->local_name = default_classic_name; 3043 3044 // Master slave policy 3045 hci_stack->master_slave_policy = 1; 3046 3047 // Allow Role Switch 3048 hci_stack->allow_role_switch = 1; 3049 3050 // Default / minimum security level = 2 3051 hci_stack->gap_security_level = LEVEL_2; 3052 3053 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3054 hci_stack->gap_required_encyrption_key_size = 7; 3055 #endif 3056 3057 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3058 hci_stack->ssp_enable = 1; 3059 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3060 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3061 hci_stack->ssp_auto_accept = 1; 3062 3063 // Secure Connections: enable (requires support from Controller) 3064 hci_stack->secure_connections_enable = true; 3065 3066 // voice setting - signed 16 bit pcm data with CVSD over the air 3067 hci_stack->sco_voice_setting = 0x60; 3068 3069 #ifdef ENABLE_LE_CENTRAL 3070 // connection parameter to use for outgoing connections 3071 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3072 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3073 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3074 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3075 hci_stack->le_connection_latency = 4; // 4 3076 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3077 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3078 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3079 3080 // default LE Scanning 3081 hci_stack->le_scan_type = 0x1; // active 3082 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3083 hci_stack->le_scan_window = 0x30; // 30 ms 3084 #endif 3085 3086 #ifdef ENABLE_LE_PERIPHERAL 3087 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3088 #endif 3089 3090 // connection parameter range used to answer connection parameter update requests in l2cap 3091 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3092 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3093 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3094 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3095 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3096 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3097 3098 hci_state_reset(); 3099 } 3100 3101 /** 3102 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3103 */ 3104 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3105 hci_stack->chipset = chipset_driver; 3106 3107 // reset chipset driver - init is also called on power_up 3108 if (hci_stack->chipset && hci_stack->chipset->init){ 3109 hci_stack->chipset->init(hci_stack->config); 3110 } 3111 } 3112 3113 /** 3114 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3115 */ 3116 void hci_set_control(const btstack_control_t *hardware_control){ 3117 // references to used control implementation 3118 hci_stack->control = hardware_control; 3119 // init with transport config 3120 hardware_control->init(hci_stack->config); 3121 } 3122 3123 void hci_close(void){ 3124 // close remote device db 3125 if (hci_stack->link_key_db) { 3126 hci_stack->link_key_db->close(); 3127 } 3128 3129 btstack_linked_list_iterator_t lit; 3130 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3131 while (btstack_linked_list_iterator_has_next(&lit)){ 3132 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3133 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3134 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3135 hci_shutdown_connection(connection); 3136 } 3137 3138 hci_power_control(HCI_POWER_OFF); 3139 3140 #ifdef HAVE_MALLOC 3141 free(hci_stack); 3142 #endif 3143 hci_stack = NULL; 3144 } 3145 3146 #ifdef ENABLE_CLASSIC 3147 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3148 // validate ranage and set 3149 if (encryption_key_size < 7) return; 3150 if (encryption_key_size > 16) return; 3151 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3152 } 3153 3154 void gap_set_security_level(gap_security_level_t security_level){ 3155 hci_stack->gap_security_level = security_level; 3156 } 3157 3158 gap_security_level_t gap_get_security_level(void){ 3159 return hci_stack->gap_security_level; 3160 } 3161 #endif 3162 3163 #ifdef ENABLE_CLASSIC 3164 void gap_set_class_of_device(uint32_t class_of_device){ 3165 hci_stack->class_of_device = class_of_device; 3166 } 3167 3168 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3169 hci_stack->default_link_policy_settings = default_link_policy_settings; 3170 } 3171 3172 void gap_set_allow_role_switch(bool allow_role_switch){ 3173 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3174 } 3175 3176 uint8_t hci_get_allow_role_switch(void){ 3177 return hci_stack->allow_role_switch; 3178 } 3179 3180 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3181 hci_stack->link_supervision_timeout = link_supervision_timeout; 3182 } 3183 3184 void hci_disable_l2cap_timeout_check(void){ 3185 disable_l2cap_timeouts = 1; 3186 } 3187 #endif 3188 3189 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3190 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3191 void hci_set_bd_addr(bd_addr_t addr){ 3192 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3193 hci_stack->custom_bd_addr_set = 1; 3194 } 3195 #endif 3196 3197 // State-Module-Driver overview 3198 // state module low-level 3199 // HCI_STATE_OFF off close 3200 // HCI_STATE_INITIALIZING, on open 3201 // HCI_STATE_WORKING, on open 3202 // HCI_STATE_HALTING, on open 3203 // HCI_STATE_SLEEPING, off/sleep close 3204 // HCI_STATE_FALLING_ASLEEP on open 3205 3206 static int hci_power_control_on(void){ 3207 3208 // power on 3209 int err = 0; 3210 if (hci_stack->control && hci_stack->control->on){ 3211 err = (*hci_stack->control->on)(); 3212 } 3213 if (err){ 3214 log_error( "POWER_ON failed"); 3215 hci_emit_hci_open_failed(); 3216 return err; 3217 } 3218 3219 // int chipset driver 3220 if (hci_stack->chipset && hci_stack->chipset->init){ 3221 hci_stack->chipset->init(hci_stack->config); 3222 } 3223 3224 // init transport 3225 if (hci_stack->hci_transport->init){ 3226 hci_stack->hci_transport->init(hci_stack->config); 3227 } 3228 3229 // open transport 3230 err = hci_stack->hci_transport->open(); 3231 if (err){ 3232 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3233 if (hci_stack->control && hci_stack->control->off){ 3234 (*hci_stack->control->off)(); 3235 } 3236 hci_emit_hci_open_failed(); 3237 return err; 3238 } 3239 return 0; 3240 } 3241 3242 static void hci_power_control_off(void){ 3243 3244 log_info("hci_power_control_off"); 3245 3246 // close low-level device 3247 hci_stack->hci_transport->close(); 3248 3249 log_info("hci_power_control_off - hci_transport closed"); 3250 3251 // power off 3252 if (hci_stack->control && hci_stack->control->off){ 3253 (*hci_stack->control->off)(); 3254 } 3255 3256 log_info("hci_power_control_off - control closed"); 3257 3258 hci_stack->state = HCI_STATE_OFF; 3259 } 3260 3261 static void hci_power_control_sleep(void){ 3262 3263 log_info("hci_power_control_sleep"); 3264 3265 #if 0 3266 // don't close serial port during sleep 3267 3268 // close low-level device 3269 hci_stack->hci_transport->close(hci_stack->config); 3270 #endif 3271 3272 // sleep mode 3273 if (hci_stack->control && hci_stack->control->sleep){ 3274 (*hci_stack->control->sleep)(); 3275 } 3276 3277 hci_stack->state = HCI_STATE_SLEEPING; 3278 } 3279 3280 static int hci_power_control_wake(void){ 3281 3282 log_info("hci_power_control_wake"); 3283 3284 // wake on 3285 if (hci_stack->control && hci_stack->control->wake){ 3286 (*hci_stack->control->wake)(); 3287 } 3288 3289 #if 0 3290 // open low-level device 3291 int err = hci_stack->hci_transport->open(hci_stack->config); 3292 if (err){ 3293 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3294 if (hci_stack->control && hci_stack->control->off){ 3295 (*hci_stack->control->off)(); 3296 } 3297 hci_emit_hci_open_failed(); 3298 return err; 3299 } 3300 #endif 3301 3302 return 0; 3303 } 3304 3305 static void hci_power_transition_to_initializing(void){ 3306 // set up state machine 3307 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3308 hci_stack->hci_packet_buffer_reserved = 0; 3309 hci_stack->state = HCI_STATE_INITIALIZING; 3310 hci_stack->substate = HCI_INIT_SEND_RESET; 3311 } 3312 3313 int hci_power_control(HCI_POWER_MODE power_mode){ 3314 3315 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3316 3317 int err = 0; 3318 switch (hci_stack->state){ 3319 3320 case HCI_STATE_OFF: 3321 switch (power_mode){ 3322 case HCI_POWER_ON: 3323 err = hci_power_control_on(); 3324 if (err) { 3325 log_error("hci_power_control_on() error %d", err); 3326 return err; 3327 } 3328 hci_power_transition_to_initializing(); 3329 break; 3330 case HCI_POWER_OFF: 3331 // do nothing 3332 break; 3333 case HCI_POWER_SLEEP: 3334 // do nothing (with SLEEP == OFF) 3335 break; 3336 } 3337 break; 3338 3339 case HCI_STATE_INITIALIZING: 3340 switch (power_mode){ 3341 case HCI_POWER_ON: 3342 // do nothing 3343 break; 3344 case HCI_POWER_OFF: 3345 // no connections yet, just turn it off 3346 hci_power_control_off(); 3347 break; 3348 case HCI_POWER_SLEEP: 3349 // no connections yet, just turn it off 3350 hci_power_control_sleep(); 3351 break; 3352 } 3353 break; 3354 3355 case HCI_STATE_WORKING: 3356 switch (power_mode){ 3357 case HCI_POWER_ON: 3358 // do nothing 3359 break; 3360 case HCI_POWER_OFF: 3361 // see hci_run 3362 hci_stack->state = HCI_STATE_HALTING; 3363 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3364 break; 3365 case HCI_POWER_SLEEP: 3366 // see hci_run 3367 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3368 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3369 break; 3370 } 3371 break; 3372 3373 case HCI_STATE_HALTING: 3374 switch (power_mode){ 3375 case HCI_POWER_ON: 3376 hci_power_transition_to_initializing(); 3377 break; 3378 case HCI_POWER_OFF: 3379 // do nothing 3380 break; 3381 case HCI_POWER_SLEEP: 3382 // see hci_run 3383 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3384 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3385 break; 3386 } 3387 break; 3388 3389 case HCI_STATE_FALLING_ASLEEP: 3390 switch (power_mode){ 3391 case HCI_POWER_ON: 3392 3393 #ifdef HAVE_PLATFORM_IPHONE_OS 3394 // nothing to do, if H4 supports power management 3395 if (btstack_control_iphone_power_management_enabled()){ 3396 hci_stack->state = HCI_STATE_INITIALIZING; 3397 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3398 break; 3399 } 3400 #endif 3401 hci_power_transition_to_initializing(); 3402 break; 3403 case HCI_POWER_OFF: 3404 // see hci_run 3405 hci_stack->state = HCI_STATE_HALTING; 3406 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3407 break; 3408 case HCI_POWER_SLEEP: 3409 // do nothing 3410 break; 3411 } 3412 break; 3413 3414 case HCI_STATE_SLEEPING: 3415 switch (power_mode){ 3416 case HCI_POWER_ON: 3417 3418 #ifdef HAVE_PLATFORM_IPHONE_OS 3419 // nothing to do, if H4 supports power management 3420 if (btstack_control_iphone_power_management_enabled()){ 3421 hci_stack->state = HCI_STATE_INITIALIZING; 3422 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3423 hci_update_scan_enable(); 3424 break; 3425 } 3426 #endif 3427 err = hci_power_control_wake(); 3428 if (err) return err; 3429 hci_power_transition_to_initializing(); 3430 break; 3431 case HCI_POWER_OFF: 3432 hci_stack->state = HCI_STATE_HALTING; 3433 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3434 break; 3435 case HCI_POWER_SLEEP: 3436 // do nothing 3437 break; 3438 } 3439 break; 3440 } 3441 3442 // create internal event 3443 hci_emit_state(); 3444 3445 // trigger next/first action 3446 hci_run(); 3447 3448 return 0; 3449 } 3450 3451 3452 #ifdef ENABLE_CLASSIC 3453 3454 static void hci_update_scan_enable(void){ 3455 // 2 = page scan, 1 = inq scan 3456 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3457 hci_run(); 3458 } 3459 3460 void gap_discoverable_control(uint8_t enable){ 3461 if (enable) enable = 1; // normalize argument 3462 3463 if (hci_stack->discoverable == enable){ 3464 hci_emit_discoverable_enabled(hci_stack->discoverable); 3465 return; 3466 } 3467 3468 hci_stack->discoverable = enable; 3469 hci_update_scan_enable(); 3470 } 3471 3472 void gap_connectable_control(uint8_t enable){ 3473 if (enable) enable = 1; // normalize argument 3474 3475 // don't emit event 3476 if (hci_stack->connectable == enable) return; 3477 3478 hci_stack->connectable = enable; 3479 hci_update_scan_enable(); 3480 } 3481 #endif 3482 3483 void gap_local_bd_addr(bd_addr_t address_buffer){ 3484 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3485 } 3486 3487 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3488 static void hci_host_num_completed_packets(void){ 3489 3490 // create packet manually as arrays are not supported and num_commands should not get reduced 3491 hci_reserve_packet_buffer(); 3492 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3493 3494 uint16_t size = 0; 3495 uint16_t num_handles = 0; 3496 packet[size++] = 0x35; 3497 packet[size++] = 0x0c; 3498 size++; // skip param len 3499 size++; // skip num handles 3500 3501 // add { handle, packets } entries 3502 btstack_linked_item_t * it; 3503 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3504 hci_connection_t * connection = (hci_connection_t *) it; 3505 if (connection->num_packets_completed){ 3506 little_endian_store_16(packet, size, connection->con_handle); 3507 size += 2; 3508 little_endian_store_16(packet, size, connection->num_packets_completed); 3509 size += 2; 3510 // 3511 num_handles++; 3512 connection->num_packets_completed = 0; 3513 } 3514 } 3515 3516 packet[2] = size - 3; 3517 packet[3] = num_handles; 3518 3519 hci_stack->host_completed_packets = 0; 3520 3521 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3522 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3523 3524 // release packet buffer for synchronous transport implementations 3525 if (hci_transport_synchronous()){ 3526 hci_release_packet_buffer(); 3527 hci_emit_transport_packet_sent(); 3528 } 3529 } 3530 #endif 3531 3532 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3533 UNUSED(ds); 3534 hci_stack->substate = HCI_HALTING_CLOSE; 3535 // allow packet handlers to defer final shutdown 3536 hci_emit_state(); 3537 hci_run(); 3538 } 3539 3540 static bool hci_run_acl_fragments(void){ 3541 if (hci_stack->acl_fragmentation_total_size > 0u) { 3542 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3543 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3544 if (connection) { 3545 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3546 hci_send_acl_packet_fragments(connection); 3547 return true; 3548 } 3549 } else { 3550 // connection gone -> discard further fragments 3551 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3552 hci_stack->acl_fragmentation_total_size = 0; 3553 hci_stack->acl_fragmentation_pos = 0; 3554 } 3555 } 3556 return false; 3557 } 3558 3559 #ifdef ENABLE_CLASSIC 3560 static bool hci_run_general_gap_classic(void){ 3561 3562 // decline incoming connections 3563 if (hci_stack->decline_reason){ 3564 uint8_t reason = hci_stack->decline_reason; 3565 hci_stack->decline_reason = 0; 3566 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3567 return true; 3568 } 3569 // send scan enable 3570 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3571 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3572 hci_stack->new_scan_enable_value = 0xff; 3573 return true; 3574 } 3575 // start/stop inquiry 3576 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3577 uint8_t duration = hci_stack->inquiry_state; 3578 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3579 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3580 return true; 3581 } 3582 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3583 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3584 hci_send_cmd(&hci_inquiry_cancel); 3585 return true; 3586 } 3587 // remote name request 3588 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3589 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3590 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3591 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3592 return true; 3593 } 3594 // pairing 3595 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3596 uint8_t state = hci_stack->gap_pairing_state; 3597 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3598 switch (state){ 3599 case GAP_PAIRING_STATE_SEND_PIN: 3600 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, hci_stack->gap_pairing_input.gap_pairing_pin); 3601 break; 3602 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3603 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3604 break; 3605 case GAP_PAIRING_STATE_SEND_PASSKEY: 3606 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3607 break; 3608 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3609 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3610 break; 3611 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3612 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3613 break; 3614 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3615 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3616 break; 3617 default: 3618 break; 3619 } 3620 return true; 3621 } 3622 return false; 3623 } 3624 #endif 3625 3626 #ifdef ENABLE_BLE 3627 static bool hci_run_general_gap_le(void){ 3628 3629 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3630 3631 if (hci_stack->state != HCI_STATE_WORKING) return false; 3632 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3633 3634 3635 // Phase 1: collect what to stop 3636 3637 bool scanning_stop = false; 3638 bool connecting_stop = false; 3639 bool advertising_stop = false; 3640 3641 #ifndef ENABLE_LE_CENTRAL 3642 UNUSED(scanning_stop); 3643 UNUSED(connecting_stop); 3644 #endif 3645 #ifndef ENABLE_LE_PERIPHERAL 3646 UNUSED(advertising_stop); 3647 #endif 3648 3649 // check if whitelist needs modification 3650 bool whitelist_modification_pending = false; 3651 btstack_linked_list_iterator_t lit; 3652 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3653 while (btstack_linked_list_iterator_has_next(&lit)){ 3654 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3655 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3656 whitelist_modification_pending = true; 3657 break; 3658 } 3659 } 3660 // check if resolving list needs modification 3661 bool resolving_list_modification_pending = false; 3662 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3663 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3664 resolving_list_modification_pending = true; 3665 } 3666 #endif 3667 3668 #ifdef ENABLE_LE_CENTRAL 3669 // scanning control 3670 if (hci_stack->le_scanning_active) { 3671 // stop if: 3672 // - parameter change required 3673 // - it's disabled 3674 // - whitelist change required but used for scanning 3675 // - resolving list modified 3676 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3677 if ((hci_stack->le_scanning_param_update) || 3678 !hci_stack->le_scanning_enabled || 3679 scanning_uses_whitelist || 3680 resolving_list_modification_pending){ 3681 3682 scanning_stop = true; 3683 } 3684 } 3685 #endif 3686 3687 #ifdef ENABLE_LE_CENTRAL 3688 // connecting control 3689 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3690 // stop connecting if: 3691 // - connecting uses white and whitelist modification pending 3692 // - if it got disabled 3693 // - resolving list modified 3694 bool connecting_uses_whitelist = hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST; 3695 if ((connecting_uses_whitelist && whitelist_modification_pending) || 3696 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3697 resolving_list_modification_pending) { 3698 3699 connecting_stop = true; 3700 } 3701 } 3702 #endif 3703 3704 #ifdef ENABLE_LE_PERIPHERAL 3705 // le advertisement control 3706 if (hci_stack->le_advertisements_active){ 3707 // stop if: 3708 // - parameter change required 3709 // - it's disabled 3710 // - whitelist change required but used for advertisement filter policy 3711 // - resolving list modified 3712 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3713 if ((hci_stack->le_advertisements_todo != 0) || 3714 !hci_stack->le_advertisements_enabled_for_current_roles || 3715 (advertising_uses_whitelist & whitelist_modification_pending) || 3716 resolving_list_modification_pending) { 3717 3718 advertising_stop = true; 3719 } 3720 } 3721 #endif 3722 3723 3724 // Phase 2: stop everything that should be off during modifications 3725 3726 #ifdef ENABLE_LE_CENTRAL 3727 if (scanning_stop){ 3728 hci_stack->le_scanning_active = false; 3729 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3730 return true; 3731 } 3732 #endif 3733 3734 #ifdef ENABLE_LE_CENTRAL 3735 if (connecting_stop){ 3736 if (hci_stack->le_connecting_state != LE_CONNECTING_CANCEL){ 3737 hci_send_cmd(&hci_le_create_connection_cancel); 3738 return true; 3739 } 3740 } 3741 #endif 3742 3743 #ifdef ENABLE_LE_PERIPHERAL 3744 if (advertising_stop){ 3745 hci_stack->le_advertisements_active = false; 3746 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3747 return true; 3748 } 3749 #endif 3750 3751 // Phase 3: modify 3752 3753 #ifdef ENABLE_LE_CENTRAL 3754 if (hci_stack->le_scanning_param_update){ 3755 hci_stack->le_scanning_param_update = false; 3756 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3757 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3758 return true; 3759 } 3760 #endif 3761 3762 #ifdef ENABLE_LE_PERIPHERAL 3763 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3764 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3765 hci_send_cmd(&hci_le_set_advertising_parameters, 3766 hci_stack->le_advertisements_interval_min, 3767 hci_stack->le_advertisements_interval_max, 3768 hci_stack->le_advertisements_type, 3769 hci_stack->le_own_addr_type, 3770 hci_stack->le_advertisements_direct_address_type, 3771 hci_stack->le_advertisements_direct_address, 3772 hci_stack->le_advertisements_channel_map, 3773 hci_stack->le_advertisements_filter_policy); 3774 return true; 3775 } 3776 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3777 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3778 uint8_t adv_data_clean[31]; 3779 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3780 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3781 hci_stack->le_advertisements_data_len); 3782 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3783 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3784 return true; 3785 } 3786 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3787 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3788 uint8_t scan_data_clean[31]; 3789 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3790 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3791 hci_stack->le_scan_response_data_len); 3792 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3793 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3794 return true; 3795 } 3796 #endif 3797 3798 3799 #ifdef ENABLE_LE_CENTRAL 3800 // if connect with whitelist was active and is not cancelled yet, wait until next time 3801 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3802 #endif 3803 3804 // LE Whitelist Management 3805 if (whitelist_modification_pending){ 3806 // add/remove entries 3807 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3808 while (btstack_linked_list_iterator_has_next(&lit)){ 3809 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3810 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3811 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3812 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3813 return true; 3814 } 3815 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3816 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3817 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3818 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3819 return true; 3820 } 3821 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3822 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3823 btstack_memory_whitelist_entry_free(entry); 3824 } 3825 } 3826 } 3827 3828 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3829 // LE Resolving List Management 3830 uint16_t i; 3831 switch (hci_stack->le_resolving_list_state){ 3832 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3833 // check if supported 3834 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0){ 3835 log_info("LE Address Resolution not supported"); 3836 break; 3837 } else { 3838 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3839 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3840 return true; 3841 } 3842 break; 3843 case LE_RESOLVING_LIST_READ_SIZE: 3844 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3845 hci_send_cmd(&hci_le_read_resolving_list_size); 3846 return true; 3847 case LE_RESOLVING_LIST_SEND_CLEAR: 3848 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3849 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, sizeof(hci_stack->le_resolving_list_add_entries)); 3850 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, sizeof(hci_stack->le_resolving_list_remove_entries)); 3851 hci_send_cmd(&hci_le_clear_resolving_list); 3852 return true; 3853 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3854 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3855 uint8_t offset = i >> 3; 3856 uint8_t mask = 1 << (i & 7); 3857 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3858 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3859 bd_addr_t peer_identity_addreses; 3860 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3861 sm_key_t peer_irk; 3862 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3863 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3864 3865 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3866 // trigger whitelist entry 'update' (work around for controller bug) 3867 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3868 while (btstack_linked_list_iterator_has_next(&lit)) { 3869 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3870 if (entry->address_type != peer_identity_addr_type) continue; 3871 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3872 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3873 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3874 } 3875 #endif 3876 3877 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, peer_identity_addreses); 3878 return true; 3879 } 3880 3881 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3882 3883 /* fall through */ 3884 3885 case LE_RESOLVING_LIST_ADD_ENTRIES: 3886 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3887 uint8_t offset = i >> 3; 3888 uint8_t mask = 1 << (i & 7); 3889 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3890 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3891 bd_addr_t peer_identity_addreses; 3892 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3893 sm_key_t peer_irk; 3894 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3895 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3896 const uint8_t * local_irk = gap_get_persistent_irk(); 3897 // command uses format specifier 'P' that stores 16-byte value without flip 3898 uint8_t local_irk_flipped[16]; 3899 uint8_t peer_irk_flipped[16]; 3900 reverse_128(local_irk, local_irk_flipped); 3901 reverse_128(peer_irk, peer_irk_flipped); 3902 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, peer_irk_flipped, local_irk_flipped); 3903 return true; 3904 } 3905 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3906 break; 3907 3908 default: 3909 break; 3910 } 3911 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3912 #endif 3913 3914 // Phase 4: restore state 3915 3916 #ifdef ENABLE_LE_CENTRAL 3917 // re-start scanning 3918 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 3919 hci_stack->le_scanning_active = true; 3920 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 3921 return true; 3922 } 3923 #endif 3924 3925 #ifdef ENABLE_LE_CENTRAL 3926 // re-start connecting 3927 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 3928 bd_addr_t null_addr; 3929 memset(null_addr, 0, 6); 3930 hci_send_cmd(&hci_le_create_connection, 3931 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3932 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3933 1, // use whitelist 3934 0, // peer address type 3935 null_addr, // peer bd addr 3936 hci_stack->le_own_addr_type, // our addr type: 3937 hci_stack->le_connection_interval_min, // conn interval min 3938 hci_stack->le_connection_interval_max, // conn interval max 3939 hci_stack->le_connection_latency, // conn latency 3940 hci_stack->le_supervision_timeout, // conn latency 3941 hci_stack->le_minimum_ce_length, // min ce length 3942 hci_stack->le_maximum_ce_length // max ce length 3943 ); 3944 return true; 3945 } 3946 #endif 3947 3948 #ifdef ENABLE_LE_PERIPHERAL 3949 // re-start advertising 3950 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 3951 // check if advertisements should be enabled given 3952 hci_stack->le_advertisements_active = true; 3953 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3954 return true; 3955 } 3956 #endif 3957 3958 return false; 3959 } 3960 #endif 3961 3962 static bool hci_run_general_pending_commands(void){ 3963 btstack_linked_item_t * it; 3964 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3965 hci_connection_t * connection = (hci_connection_t *) it; 3966 3967 switch(connection->state){ 3968 case SEND_CREATE_CONNECTION: 3969 switch(connection->address_type){ 3970 #ifdef ENABLE_CLASSIC 3971 case BD_ADDR_TYPE_ACL: 3972 log_info("sending hci_create_connection"); 3973 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3974 break; 3975 #endif 3976 default: 3977 #ifdef ENABLE_BLE 3978 #ifdef ENABLE_LE_CENTRAL 3979 log_info("sending hci_le_create_connection"); 3980 hci_send_cmd(&hci_le_create_connection, 3981 hci_stack->le_connection_scan_interval, // conn scan interval 3982 hci_stack->le_connection_scan_window, // conn scan windows 3983 0, // don't use whitelist 3984 connection->address_type, // peer address type 3985 connection->address, // peer bd addr 3986 hci_stack->le_own_addr_type, // our addr type: 3987 hci_stack->le_connection_interval_min, // conn interval min 3988 hci_stack->le_connection_interval_max, // conn interval max 3989 hci_stack->le_connection_latency, // conn latency 3990 hci_stack->le_supervision_timeout, // conn latency 3991 hci_stack->le_minimum_ce_length, // min ce length 3992 hci_stack->le_maximum_ce_length // max ce length 3993 ); 3994 connection->state = SENT_CREATE_CONNECTION; 3995 #endif 3996 #endif 3997 break; 3998 } 3999 return true; 4000 4001 #ifdef ENABLE_CLASSIC 4002 case RECEIVED_CONNECTION_REQUEST: 4003 connection->role = HCI_ROLE_SLAVE; 4004 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4005 log_info("sending hci_accept_connection_request"); 4006 connection->state = ACCEPTED_CONNECTION_REQUEST; 4007 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4008 } 4009 return true; 4010 #endif 4011 4012 #ifdef ENABLE_BLE 4013 #ifdef ENABLE_LE_CENTRAL 4014 case SEND_CANCEL_CONNECTION: 4015 connection->state = SENT_CANCEL_CONNECTION; 4016 hci_send_cmd(&hci_le_create_connection_cancel); 4017 return true; 4018 #endif 4019 #endif 4020 case SEND_DISCONNECT: 4021 connection->state = SENT_DISCONNECT; 4022 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4023 return true; 4024 4025 default: 4026 break; 4027 } 4028 4029 // no further commands if connection is about to get shut down 4030 if (connection->state == SENT_DISCONNECT) continue; 4031 4032 if (connection->authentication_flags & READ_RSSI){ 4033 connectionClearAuthenticationFlags(connection, READ_RSSI); 4034 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4035 return true; 4036 } 4037 4038 #ifdef ENABLE_CLASSIC 4039 4040 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4041 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4042 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4043 return true; 4044 } 4045 4046 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4047 log_info("responding to link key request"); 4048 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4049 4050 link_key_t link_key; 4051 link_key_type_t link_key_type; 4052 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4053 4054 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4055 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4056 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4057 if (sc_downgrade){ 4058 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4059 connection->state = SENT_DISCONNECT; 4060 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4061 return true; 4062 } 4063 4064 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4065 if (have_link_key && security_level_sufficient){ 4066 connection->link_key_type = link_key_type; 4067 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4068 } else { 4069 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4070 } 4071 return true; 4072 } 4073 4074 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4075 log_info("denying to pin request"); 4076 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4077 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4078 return true; 4079 } 4080 4081 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4082 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4083 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4084 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4085 // tweak authentication requirements 4086 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4087 if (connection->bonding_flags & BONDING_DEDICATED){ 4088 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4089 } 4090 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4091 authreq |= 1; 4092 } 4093 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4094 } else { 4095 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4096 } 4097 return true; 4098 } 4099 4100 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4101 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4102 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4103 return true; 4104 } 4105 4106 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4107 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4108 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4109 return true; 4110 } 4111 4112 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4113 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4114 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4115 return true; 4116 } 4117 4118 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4119 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4120 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4121 return true; 4122 } 4123 4124 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4125 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4126 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4127 return true; 4128 } 4129 4130 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4131 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4132 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4133 connection->state = SENT_DISCONNECT; 4134 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4135 return true; 4136 } 4137 4138 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4139 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4140 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4141 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4142 return true; 4143 } 4144 4145 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4146 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4147 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4148 return true; 4149 } 4150 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4151 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4152 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4153 return true; 4154 } 4155 #endif 4156 4157 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4158 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4159 if (connection->state != SENT_DISCONNECT){ 4160 connection->state = SENT_DISCONNECT; 4161 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4162 return true; 4163 } 4164 } 4165 4166 #ifdef ENABLE_CLASSIC 4167 uint16_t sniff_min_interval; 4168 switch (connection->sniff_min_interval){ 4169 case 0: 4170 break; 4171 case 0xffff: 4172 connection->sniff_min_interval = 0; 4173 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4174 return true; 4175 default: 4176 sniff_min_interval = connection->sniff_min_interval; 4177 connection->sniff_min_interval = 0; 4178 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4179 return true; 4180 } 4181 4182 if (connection->request_role != HCI_ROLE_INVALID){ 4183 hci_role_t role = connection->request_role; 4184 connection->request_role = HCI_ROLE_INVALID; 4185 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4186 return true; 4187 } 4188 #endif 4189 4190 #ifdef ENABLE_BLE 4191 switch (connection->le_con_parameter_update_state){ 4192 // response to L2CAP CON PARAMETER UPDATE REQUEST 4193 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4194 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4195 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4196 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4197 0x0000, 0xffff); 4198 return true; 4199 case CON_PARAMETER_UPDATE_REPLY: 4200 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4201 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4202 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4203 0x0000, 0xffff); 4204 return true; 4205 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4206 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4207 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4208 return true; 4209 default: 4210 break; 4211 } 4212 if (connection->le_phy_update_all_phys != 0xffu){ 4213 uint8_t all_phys = connection->le_phy_update_all_phys; 4214 connection->le_phy_update_all_phys = 0xff; 4215 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 4216 return true; 4217 } 4218 #endif 4219 } 4220 return false; 4221 } 4222 4223 static void hci_run(void){ 4224 4225 bool done; 4226 4227 // send continuation fragments first, as they block the prepared packet buffer 4228 done = hci_run_acl_fragments(); 4229 if (done) return; 4230 4231 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4232 // send host num completed packets next as they don't require num_cmd_packets > 0 4233 if (!hci_can_send_comand_packet_transport()) return; 4234 if (hci_stack->host_completed_packets){ 4235 hci_host_num_completed_packets(); 4236 return; 4237 } 4238 #endif 4239 4240 if (!hci_can_send_command_packet_now()) return; 4241 4242 // global/non-connection oriented commands 4243 4244 4245 #ifdef ENABLE_CLASSIC 4246 // general gap classic 4247 done = hci_run_general_gap_classic(); 4248 if (done) return; 4249 #endif 4250 4251 #ifdef ENABLE_BLE 4252 // general gap le 4253 done = hci_run_general_gap_le(); 4254 if (done) return; 4255 #endif 4256 4257 // send pending HCI commands 4258 done = hci_run_general_pending_commands(); 4259 if (done) return; 4260 4261 // stack state sub statemachines 4262 hci_connection_t * connection; 4263 switch (hci_stack->state){ 4264 case HCI_STATE_INITIALIZING: 4265 hci_initializing_run(); 4266 break; 4267 4268 case HCI_STATE_HALTING: 4269 4270 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4271 switch (hci_stack->substate){ 4272 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4273 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4274 4275 #ifdef ENABLE_BLE 4276 #ifdef ENABLE_LE_CENTRAL 4277 // free whitelist entries 4278 { 4279 btstack_linked_list_iterator_t lit; 4280 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4281 while (btstack_linked_list_iterator_has_next(&lit)){ 4282 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4283 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4284 btstack_memory_whitelist_entry_free(entry); 4285 } 4286 } 4287 #endif 4288 #endif 4289 // close all open connections 4290 connection = (hci_connection_t *) hci_stack->connections; 4291 if (connection){ 4292 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4293 if (!hci_can_send_command_packet_now()) return; 4294 4295 // check state 4296 if (connection->state == SENT_DISCONNECT) return; 4297 connection->state = SENT_DISCONNECT; 4298 4299 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4300 4301 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4302 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4303 4304 // ... which would be ignored anyway as we shutdown (free) the connection now 4305 hci_shutdown_connection(connection); 4306 4307 // finally, send the disconnect command 4308 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4309 return; 4310 } 4311 4312 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4313 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4314 log_info("HCI_STATE_HALTING: wait 50 ms"); 4315 hci_stack->substate = HCI_HALTING_W4_TIMER; 4316 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4317 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4318 btstack_run_loop_add_timer(&hci_stack->timeout); 4319 break; 4320 } 4321 4322 /* fall through */ 4323 4324 case HCI_HALTING_CLOSE: 4325 log_info("HCI_STATE_HALTING, calling off"); 4326 4327 // switch mode 4328 hci_power_control_off(); 4329 4330 log_info("HCI_STATE_HALTING, emitting state"); 4331 hci_emit_state(); 4332 log_info("HCI_STATE_HALTING, done"); 4333 break; 4334 4335 case HCI_HALTING_W4_TIMER: 4336 // keep waiting 4337 4338 break; 4339 default: 4340 break; 4341 } 4342 4343 break; 4344 4345 case HCI_STATE_FALLING_ASLEEP: 4346 switch(hci_stack->substate) { 4347 case HCI_FALLING_ASLEEP_DISCONNECT: 4348 log_info("HCI_STATE_FALLING_ASLEEP"); 4349 // close all open connections 4350 connection = (hci_connection_t *) hci_stack->connections; 4351 4352 #ifdef HAVE_PLATFORM_IPHONE_OS 4353 // don't close connections, if H4 supports power management 4354 if (btstack_control_iphone_power_management_enabled()){ 4355 connection = NULL; 4356 } 4357 #endif 4358 if (connection){ 4359 4360 // send disconnect 4361 if (!hci_can_send_command_packet_now()) return; 4362 4363 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4364 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4365 4366 // send disconnected event right away - causes higher layer connections to get closed, too. 4367 hci_shutdown_connection(connection); 4368 return; 4369 } 4370 4371 if (hci_classic_supported()){ 4372 // disable page and inquiry scan 4373 if (!hci_can_send_command_packet_now()) return; 4374 4375 log_info("HCI_STATE_HALTING, disabling inq scans"); 4376 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4377 4378 // continue in next sub state 4379 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4380 break; 4381 } 4382 4383 /* fall through */ 4384 4385 case HCI_FALLING_ASLEEP_COMPLETE: 4386 log_info("HCI_STATE_HALTING, calling sleep"); 4387 #ifdef HAVE_PLATFORM_IPHONE_OS 4388 // don't actually go to sleep, if H4 supports power management 4389 if (btstack_control_iphone_power_management_enabled()){ 4390 // SLEEP MODE reached 4391 hci_stack->state = HCI_STATE_SLEEPING; 4392 hci_emit_state(); 4393 break; 4394 } 4395 #endif 4396 // switch mode 4397 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4398 hci_emit_state(); 4399 break; 4400 4401 default: 4402 break; 4403 } 4404 break; 4405 4406 default: 4407 break; 4408 } 4409 } 4410 4411 int hci_send_cmd_packet(uint8_t *packet, int size){ 4412 // house-keeping 4413 4414 #ifdef ENABLE_CLASSIC 4415 bd_addr_t addr; 4416 hci_connection_t * conn; 4417 #endif 4418 #ifdef ENABLE_LE_CENTRAL 4419 uint8_t initiator_filter_policy; 4420 #endif 4421 4422 uint16_t opcode = little_endian_read_16(packet, 0); 4423 switch (opcode) { 4424 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4425 hci_stack->loopback_mode = packet[3]; 4426 break; 4427 4428 #ifdef ENABLE_CLASSIC 4429 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4430 reverse_bd_addr(&packet[3], addr); 4431 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4432 4433 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4434 if (!conn) { 4435 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4436 if (!conn) { 4437 // notify client that alloc failed 4438 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4439 return -1; // packet not sent to controller 4440 } 4441 conn->state = SEND_CREATE_CONNECTION; 4442 conn->role = HCI_ROLE_MASTER; 4443 } 4444 log_info("conn state %u", conn->state); 4445 switch (conn->state) { 4446 // if connection active exists 4447 case OPEN: 4448 // and OPEN, emit connection complete command 4449 hci_emit_connection_complete(addr, conn->con_handle, 0); 4450 return -1; // packet not sent to controller 4451 case RECEIVED_DISCONNECTION_COMPLETE: 4452 // create connection triggered in disconnect complete event, let's do it now 4453 break; 4454 case SEND_CREATE_CONNECTION: 4455 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4456 break; 4457 default: 4458 // otherwise, just ignore as it is already in the open process 4459 return -1; // packet not sent to controller 4460 } 4461 conn->state = SENT_CREATE_CONNECTION; 4462 4463 // track outgoing connection 4464 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4465 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4466 break; 4467 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4468 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4469 break; 4470 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4471 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4472 break; 4473 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4474 if (hci_stack->link_key_db) { 4475 reverse_bd_addr(&packet[3], addr); 4476 hci_stack->link_key_db->delete_link_key(addr); 4477 } 4478 break; 4479 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4480 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4481 reverse_bd_addr(&packet[3], addr); 4482 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4483 if (conn) { 4484 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4485 } 4486 break; 4487 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4488 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4489 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4490 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4491 reverse_bd_addr(&packet[3], addr); 4492 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4493 if (conn) { 4494 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4495 } 4496 break; 4497 4498 #ifdef ENABLE_SCO_OVER_HCI 4499 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4500 // setup_synchronous_connection? Voice setting at offset 22 4501 // TODO: compare to current setting if sco connection already active 4502 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4503 break; 4504 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4505 // accept_synchronus_connection? Voice setting at offset 18 4506 // TODO: compare to current setting if sco connection already active 4507 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4508 break; 4509 #endif 4510 #endif 4511 4512 #ifdef ENABLE_BLE 4513 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4514 hci_stack->le_random_address_set = 1; 4515 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4516 break; 4517 #ifdef ENABLE_LE_PERIPHERAL 4518 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4519 hci_stack->le_advertisements_active = packet[3] != 0; 4520 break; 4521 #endif 4522 #ifdef ENABLE_LE_CENTRAL 4523 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4524 // white list used? 4525 initiator_filter_policy = packet[7]; 4526 switch (initiator_filter_policy) { 4527 case 0: 4528 // whitelist not used 4529 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4530 break; 4531 case 1: 4532 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4533 break; 4534 default: 4535 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4536 break; 4537 } 4538 // track outgoing connection 4539 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4540 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4541 break; 4542 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4543 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4544 break; 4545 #endif 4546 #endif 4547 default: 4548 break; 4549 } 4550 4551 hci_stack->num_cmd_packets--; 4552 4553 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4554 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4555 } 4556 4557 // disconnect because of security block 4558 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4559 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4560 if (!connection) return; 4561 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4562 } 4563 4564 4565 // Configure Secure Simple Pairing 4566 4567 #ifdef ENABLE_CLASSIC 4568 4569 // enable will enable SSP during init 4570 void gap_ssp_set_enable(int enable){ 4571 hci_stack->ssp_enable = enable; 4572 } 4573 4574 static int hci_local_ssp_activated(void){ 4575 return gap_ssp_supported() && hci_stack->ssp_enable; 4576 } 4577 4578 // if set, BTstack will respond to io capability request using authentication requirement 4579 void gap_ssp_set_io_capability(int io_capability){ 4580 hci_stack->ssp_io_capability = io_capability; 4581 } 4582 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4583 hci_stack->ssp_authentication_requirement = authentication_requirement; 4584 } 4585 4586 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4587 void gap_ssp_set_auto_accept(int auto_accept){ 4588 hci_stack->ssp_auto_accept = auto_accept; 4589 } 4590 4591 void gap_secure_connections_enable(bool enable){ 4592 hci_stack->secure_connections_enable = enable; 4593 } 4594 4595 #endif 4596 4597 // va_list part of hci_send_cmd 4598 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4599 if (!hci_can_send_command_packet_now()){ 4600 log_error("hci_send_cmd called but cannot send packet now"); 4601 return 0; 4602 } 4603 4604 // for HCI INITIALIZATION 4605 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4606 hci_stack->last_cmd_opcode = cmd->opcode; 4607 4608 hci_reserve_packet_buffer(); 4609 uint8_t * packet = hci_stack->hci_packet_buffer; 4610 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4611 int err = hci_send_cmd_packet(packet, size); 4612 4613 // release packet buffer on error or for synchronous transport implementations 4614 if ((err < 0) || hci_transport_synchronous()){ 4615 hci_release_packet_buffer(); 4616 hci_emit_transport_packet_sent(); 4617 } 4618 4619 return err; 4620 } 4621 4622 /** 4623 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4624 */ 4625 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4626 va_list argptr; 4627 va_start(argptr, cmd); 4628 int res = hci_send_cmd_va_arg(cmd, argptr); 4629 va_end(argptr); 4630 return res; 4631 } 4632 4633 // Create various non-HCI events. 4634 // TODO: generalize, use table similar to hci_create_command 4635 4636 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4637 // dump packet 4638 if (dump) { 4639 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4640 } 4641 4642 // dispatch to all event handlers 4643 btstack_linked_list_iterator_t it; 4644 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4645 while (btstack_linked_list_iterator_has_next(&it)){ 4646 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4647 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4648 } 4649 } 4650 4651 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4652 if (!hci_stack->acl_packet_handler) return; 4653 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4654 } 4655 4656 #ifdef ENABLE_CLASSIC 4657 static void hci_notify_if_sco_can_send_now(void){ 4658 // notify SCO sender if waiting 4659 if (!hci_stack->sco_waiting_for_can_send_now) return; 4660 if (hci_can_send_sco_packet_now()){ 4661 hci_stack->sco_waiting_for_can_send_now = 0; 4662 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4663 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4664 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4665 } 4666 } 4667 4668 // parsing end emitting has been merged to reduce code size 4669 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4670 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4671 4672 uint8_t * eir_data; 4673 ad_context_t context; 4674 const uint8_t * name; 4675 uint8_t name_len; 4676 4677 if (size < 3) return; 4678 4679 int event_type = hci_event_packet_get_type(packet); 4680 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4681 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4682 4683 switch (event_type){ 4684 case HCI_EVENT_INQUIRY_RESULT: 4685 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4686 if (size != (3 + (num_responses * 14))) return; 4687 break; 4688 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4689 if (size != 257) return; 4690 if (num_responses != 1) return; 4691 break; 4692 default: 4693 return; 4694 } 4695 4696 // event[1] is set at the end 4697 int i; 4698 for (i=0; i<num_responses;i++){ 4699 memset(event, 0, sizeof(event)); 4700 event[0] = GAP_EVENT_INQUIRY_RESULT; 4701 uint8_t event_size = 18; // if name is not set by EIR 4702 4703 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4704 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4705 (void)memcpy(&event[9], 4706 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4707 3); // class of device 4708 (void)memcpy(&event[12], 4709 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4710 2); // clock offset 4711 4712 switch (event_type){ 4713 case HCI_EVENT_INQUIRY_RESULT: 4714 // 14,15,16,17 = 0, size 18 4715 break; 4716 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4717 event[14] = 1; 4718 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4719 // 16,17 = 0, size 18 4720 break; 4721 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4722 event[14] = 1; 4723 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4724 // EIR packets only contain a single inquiry response 4725 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4726 name = NULL; 4727 // Iterate over EIR data 4728 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4729 uint8_t data_type = ad_iterator_get_data_type(&context); 4730 uint8_t data_size = ad_iterator_get_data_len(&context); 4731 const uint8_t * data = ad_iterator_get_data(&context); 4732 // Prefer Complete Local Name over Shortend Local Name 4733 switch (data_type){ 4734 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4735 if (name) continue; 4736 /* fall through */ 4737 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4738 name = data; 4739 name_len = data_size; 4740 break; 4741 default: 4742 break; 4743 } 4744 } 4745 if (name){ 4746 event[16] = 1; 4747 // truncate name if needed 4748 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4749 event[17] = len; 4750 (void)memcpy(&event[18], name, len); 4751 event_size += len; 4752 } 4753 break; 4754 } 4755 event[1] = event_size - 2; 4756 hci_emit_event(event, event_size, 1); 4757 } 4758 } 4759 #endif 4760 4761 void hci_emit_state(void){ 4762 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4763 uint8_t event[3]; 4764 event[0] = BTSTACK_EVENT_STATE; 4765 event[1] = sizeof(event) - 2u; 4766 event[2] = hci_stack->state; 4767 hci_emit_event(event, sizeof(event), 1); 4768 } 4769 4770 #ifdef ENABLE_CLASSIC 4771 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4772 uint8_t event[13]; 4773 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4774 event[1] = sizeof(event) - 2; 4775 event[2] = status; 4776 little_endian_store_16(event, 3, con_handle); 4777 reverse_bd_addr(address, &event[5]); 4778 event[11] = 1; // ACL connection 4779 event[12] = 0; // encryption disabled 4780 hci_emit_event(event, sizeof(event), 1); 4781 } 4782 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4783 if (disable_l2cap_timeouts) return; 4784 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4785 uint8_t event[4]; 4786 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4787 event[1] = sizeof(event) - 2; 4788 little_endian_store_16(event, 2, conn->con_handle); 4789 hci_emit_event(event, sizeof(event), 1); 4790 } 4791 #endif 4792 4793 #ifdef ENABLE_BLE 4794 #ifdef ENABLE_LE_CENTRAL 4795 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4796 uint8_t event[21]; 4797 event[0] = HCI_EVENT_LE_META; 4798 event[1] = sizeof(event) - 2u; 4799 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4800 event[3] = status; 4801 little_endian_store_16(event, 4, con_handle); 4802 event[6] = 0; // TODO: role 4803 event[7] = address_type; 4804 reverse_bd_addr(address, &event[8]); 4805 little_endian_store_16(event, 14, 0); // interval 4806 little_endian_store_16(event, 16, 0); // latency 4807 little_endian_store_16(event, 18, 0); // supervision timeout 4808 event[20] = 0; // master clock accuracy 4809 hci_emit_event(event, sizeof(event), 1); 4810 } 4811 #endif 4812 #endif 4813 4814 static void hci_emit_transport_packet_sent(void){ 4815 // notify upper stack that it might be possible to send again 4816 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4817 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4818 } 4819 4820 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4821 uint8_t event[6]; 4822 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4823 event[1] = sizeof(event) - 2u; 4824 event[2] = 0; // status = OK 4825 little_endian_store_16(event, 3, con_handle); 4826 event[5] = reason; 4827 hci_emit_event(event, sizeof(event), 1); 4828 } 4829 4830 static void hci_emit_nr_connections_changed(void){ 4831 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4832 uint8_t event[3]; 4833 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4834 event[1] = sizeof(event) - 2u; 4835 event[2] = nr_hci_connections(); 4836 hci_emit_event(event, sizeof(event), 1); 4837 } 4838 4839 static void hci_emit_hci_open_failed(void){ 4840 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4841 uint8_t event[2]; 4842 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4843 event[1] = sizeof(event) - 2u; 4844 hci_emit_event(event, sizeof(event), 1); 4845 } 4846 4847 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4848 log_info("hci_emit_dedicated_bonding_result %u ", status); 4849 uint8_t event[9]; 4850 int pos = 0; 4851 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4852 event[pos++] = sizeof(event) - 2u; 4853 event[pos++] = status; 4854 reverse_bd_addr(address, &event[pos]); 4855 hci_emit_event(event, sizeof(event), 1); 4856 } 4857 4858 4859 #ifdef ENABLE_CLASSIC 4860 4861 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4862 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4863 uint8_t event[5]; 4864 int pos = 0; 4865 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4866 event[pos++] = sizeof(event) - 2; 4867 little_endian_store_16(event, 2, con_handle); 4868 pos += 2; 4869 event[pos++] = level; 4870 hci_emit_event(event, sizeof(event), 1); 4871 } 4872 4873 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4874 if (!connection) return LEVEL_0; 4875 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4876 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4877 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4878 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4879 // LEVEL 4 always requires 128 bit encrytion key size 4880 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4881 security_level = LEVEL_3; 4882 } 4883 return security_level; 4884 } 4885 4886 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4887 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4888 uint8_t event[3]; 4889 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4890 event[1] = sizeof(event) - 2; 4891 event[2] = enabled; 4892 hci_emit_event(event, sizeof(event), 1); 4893 } 4894 4895 // query if remote side supports eSCO 4896 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4897 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4898 if (!connection) return 0; 4899 return (connection->remote_supported_features[0] & 1) != 0; 4900 } 4901 4902 static bool hci_ssp_supported(hci_connection_t * connection){ 4903 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4904 return (connection->bonding_flags & mask) == mask; 4905 } 4906 4907 // query if remote side supports SSP 4908 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4909 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4910 if (!connection) return 0; 4911 return hci_ssp_supported(connection) ? 1 : 0; 4912 } 4913 4914 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4915 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4916 } 4917 4918 // GAP API 4919 /** 4920 * @bbrief enable/disable bonding. default is enabled 4921 * @praram enabled 4922 */ 4923 void gap_set_bondable_mode(int enable){ 4924 hci_stack->bondable = enable ? 1 : 0; 4925 } 4926 /** 4927 * @brief Get bondable mode. 4928 * @return 1 if bondable 4929 */ 4930 int gap_get_bondable_mode(void){ 4931 return hci_stack->bondable; 4932 } 4933 4934 /** 4935 * @brief map link keys to security levels 4936 */ 4937 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4938 switch (link_key_type){ 4939 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4940 return LEVEL_4; 4941 case COMBINATION_KEY: 4942 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4943 return LEVEL_3; 4944 default: 4945 return LEVEL_2; 4946 } 4947 } 4948 4949 /** 4950 * @brief map link keys to secure connection yes/no 4951 */ 4952 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4953 switch (link_key_type){ 4954 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4955 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4956 return 1; 4957 default: 4958 return 0; 4959 } 4960 } 4961 4962 /** 4963 * @brief map link keys to authenticated 4964 */ 4965 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4966 switch (link_key_type){ 4967 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4968 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4969 return 1; 4970 default: 4971 return 0; 4972 } 4973 } 4974 4975 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4976 log_info("gap_mitm_protection_required_for_security_level %u", level); 4977 return level > LEVEL_2; 4978 } 4979 4980 /** 4981 * @brief get current security level 4982 */ 4983 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4984 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4985 if (!connection) return LEVEL_0; 4986 return gap_security_level_for_connection(connection); 4987 } 4988 4989 /** 4990 * @brief request connection to device to 4991 * @result GAP_AUTHENTICATION_RESULT 4992 */ 4993 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4994 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4995 if (!connection){ 4996 hci_emit_security_level(con_handle, LEVEL_0); 4997 return; 4998 } 4999 gap_security_level_t current_level = gap_security_level(con_handle); 5000 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5001 requested_level, connection->requested_security_level, current_level); 5002 5003 // assumption: earlier requested security higher than current level => security request is active 5004 if (current_level < connection->requested_security_level){ 5005 if (connection->requested_security_level < requested_level){ 5006 // increase requested level as new level is higher 5007 5008 // TODO: handle re-authentication when done 5009 5010 connection->requested_security_level = requested_level; 5011 } 5012 return; 5013 } 5014 5015 // no request active, notify if security sufficient 5016 if (requested_level <= current_level){ 5017 hci_emit_security_level(con_handle, current_level); 5018 return; 5019 } 5020 5021 // start pairing to increase security level 5022 connection->requested_security_level = requested_level; 5023 5024 #if 0 5025 // sending encryption request without a link key results in an error. 5026 // TODO: figure out how to use it properly 5027 5028 // would enabling ecnryption suffice (>= LEVEL_2)? 5029 if (hci_stack->link_key_db){ 5030 link_key_type_t link_key_type; 5031 link_key_t link_key; 5032 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 5033 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 5034 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 5035 return; 5036 } 5037 } 5038 } 5039 #endif 5040 5041 // start to authenticate connection if not already active 5042 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5043 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5044 hci_run(); 5045 } 5046 5047 /** 5048 * @brief start dedicated bonding with device. disconnect after bonding 5049 * @param device 5050 * @param request MITM protection 5051 * @result GAP_DEDICATED_BONDING_COMPLETE 5052 */ 5053 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5054 5055 // create connection state machine 5056 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5057 5058 if (!connection){ 5059 return BTSTACK_MEMORY_ALLOC_FAILED; 5060 } 5061 5062 // delete linkn key 5063 gap_drop_link_key_for_bd_addr(device); 5064 5065 // configure LEVEL_2/3, dedicated bonding 5066 connection->state = SEND_CREATE_CONNECTION; 5067 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5068 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5069 connection->bonding_flags = BONDING_DEDICATED; 5070 5071 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5072 5073 // handle: connnection failure (connection complete != ok) 5074 // handle: authentication failure 5075 // handle: disconnect on done 5076 5077 hci_run(); 5078 5079 return 0; 5080 } 5081 #endif 5082 5083 void gap_set_local_name(const char * local_name){ 5084 hci_stack->local_name = local_name; 5085 } 5086 5087 5088 #ifdef ENABLE_BLE 5089 5090 #ifdef ENABLE_LE_CENTRAL 5091 void gap_start_scan(void){ 5092 hci_stack->le_scanning_enabled = true; 5093 hci_run(); 5094 } 5095 5096 void gap_stop_scan(void){ 5097 hci_stack->le_scanning_enabled = false; 5098 hci_run(); 5099 } 5100 5101 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5102 hci_stack->le_scan_type = scan_type; 5103 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5104 hci_stack->le_scan_interval = scan_interval; 5105 hci_stack->le_scan_window = scan_window; 5106 hci_stack->le_scanning_param_update = true; 5107 hci_run(); 5108 } 5109 5110 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5111 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5112 } 5113 5114 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5115 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5116 if (!conn){ 5117 // disallow if le connection is already outgoing 5118 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5119 log_error("le connection already active"); 5120 return ERROR_CODE_COMMAND_DISALLOWED; 5121 } 5122 5123 log_info("gap_connect: no connection exists yet, creating context"); 5124 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5125 if (!conn){ 5126 // notify client that alloc failed 5127 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5128 log_info("gap_connect: failed to alloc hci_connection_t"); 5129 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5130 } 5131 5132 // set le connecting state 5133 if (hci_is_le_connection_type(addr_type)){ 5134 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5135 } 5136 5137 conn->state = SEND_CREATE_CONNECTION; 5138 log_info("gap_connect: send create connection next"); 5139 hci_run(); 5140 return ERROR_CODE_SUCCESS; 5141 } 5142 5143 if (!hci_is_le_connection(conn) || 5144 (conn->state == SEND_CREATE_CONNECTION) || 5145 (conn->state == SENT_CREATE_CONNECTION)) { 5146 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5147 log_error("gap_connect: classic connection or connect is already being created"); 5148 return GATT_CLIENT_IN_WRONG_STATE; 5149 } 5150 5151 // check if connection was just disconnected 5152 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5153 log_info("gap_connect: send create connection (again)"); 5154 conn->state = SEND_CREATE_CONNECTION; 5155 hci_run(); 5156 return ERROR_CODE_SUCCESS; 5157 } 5158 5159 log_info("gap_connect: context exists with state %u", conn->state); 5160 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5161 hci_run(); 5162 return ERROR_CODE_SUCCESS; 5163 } 5164 5165 // @assumption: only a single outgoing LE Connection exists 5166 static hci_connection_t * gap_get_outgoing_connection(void){ 5167 btstack_linked_item_t *it; 5168 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5169 hci_connection_t * conn = (hci_connection_t *) it; 5170 if (!hci_is_le_connection(conn)) continue; 5171 switch (conn->state){ 5172 case SEND_CREATE_CONNECTION: 5173 case SENT_CREATE_CONNECTION: 5174 case SENT_CANCEL_CONNECTION: 5175 return conn; 5176 default: 5177 break; 5178 }; 5179 } 5180 return NULL; 5181 } 5182 5183 uint8_t gap_connect_cancel(void){ 5184 hci_connection_t * conn = gap_get_outgoing_connection(); 5185 if (!conn) return 0; 5186 switch (conn->state){ 5187 case SEND_CREATE_CONNECTION: 5188 // skip sending create connection and emit event instead 5189 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5190 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5191 btstack_memory_hci_connection_free( conn ); 5192 break; 5193 case SENT_CREATE_CONNECTION: 5194 // request to send cancel connection 5195 conn->state = SEND_CANCEL_CONNECTION; 5196 hci_run(); 5197 break; 5198 default: 5199 break; 5200 } 5201 return 0; 5202 } 5203 #endif 5204 5205 #ifdef ENABLE_LE_CENTRAL 5206 /** 5207 * @brief Set connection parameters for outgoing connections 5208 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5209 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5210 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5211 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5212 * @param conn_latency, default: 4 5213 * @param supervision_timeout (unit: 10ms), default: 720 ms 5214 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5215 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5216 */ 5217 5218 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5219 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5220 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5221 hci_stack->le_connection_scan_interval = conn_scan_interval; 5222 hci_stack->le_connection_scan_window = conn_scan_window; 5223 hci_stack->le_connection_interval_min = conn_interval_min; 5224 hci_stack->le_connection_interval_max = conn_interval_max; 5225 hci_stack->le_connection_latency = conn_latency; 5226 hci_stack->le_supervision_timeout = supervision_timeout; 5227 hci_stack->le_minimum_ce_length = min_ce_length; 5228 hci_stack->le_maximum_ce_length = max_ce_length; 5229 } 5230 #endif 5231 5232 /** 5233 * @brief Updates the connection parameters for a given LE connection 5234 * @param handle 5235 * @param conn_interval_min (unit: 1.25ms) 5236 * @param conn_interval_max (unit: 1.25ms) 5237 * @param conn_latency 5238 * @param supervision_timeout (unit: 10ms) 5239 * @returns 0 if ok 5240 */ 5241 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5242 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5243 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5244 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5245 connection->le_conn_interval_min = conn_interval_min; 5246 connection->le_conn_interval_max = conn_interval_max; 5247 connection->le_conn_latency = conn_latency; 5248 connection->le_supervision_timeout = supervision_timeout; 5249 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5250 hci_run(); 5251 return 0; 5252 } 5253 5254 /** 5255 * @brief Request an update of the connection parameter for a given LE connection 5256 * @param handle 5257 * @param conn_interval_min (unit: 1.25ms) 5258 * @param conn_interval_max (unit: 1.25ms) 5259 * @param conn_latency 5260 * @param supervision_timeout (unit: 10ms) 5261 * @returns 0 if ok 5262 */ 5263 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5264 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5265 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5266 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5267 connection->le_conn_interval_min = conn_interval_min; 5268 connection->le_conn_interval_max = conn_interval_max; 5269 connection->le_conn_latency = conn_latency; 5270 connection->le_supervision_timeout = supervision_timeout; 5271 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5272 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5273 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5274 return 0; 5275 } 5276 5277 #ifdef ENABLE_LE_PERIPHERAL 5278 5279 /** 5280 * @brief Set Advertisement Data 5281 * @param advertising_data_length 5282 * @param advertising_data (max 31 octets) 5283 * @note data is not copied, pointer has to stay valid 5284 */ 5285 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5286 hci_stack->le_advertisements_data_len = advertising_data_length; 5287 hci_stack->le_advertisements_data = advertising_data; 5288 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5289 hci_run(); 5290 } 5291 5292 /** 5293 * @brief Set Scan Response Data 5294 * @param advertising_data_length 5295 * @param advertising_data (max 31 octets) 5296 * @note data is not copied, pointer has to stay valid 5297 */ 5298 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5299 hci_stack->le_scan_response_data_len = scan_response_data_length; 5300 hci_stack->le_scan_response_data = scan_response_data; 5301 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5302 hci_run(); 5303 } 5304 5305 /** 5306 * @brief Set Advertisement Parameters 5307 * @param adv_int_min 5308 * @param adv_int_max 5309 * @param adv_type 5310 * @param direct_address_type 5311 * @param direct_address 5312 * @param channel_map 5313 * @param filter_policy 5314 * 5315 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5316 */ 5317 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5318 uint8_t direct_address_typ, bd_addr_t direct_address, 5319 uint8_t channel_map, uint8_t filter_policy) { 5320 5321 hci_stack->le_advertisements_interval_min = adv_int_min; 5322 hci_stack->le_advertisements_interval_max = adv_int_max; 5323 hci_stack->le_advertisements_type = adv_type; 5324 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5325 hci_stack->le_advertisements_channel_map = channel_map; 5326 hci_stack->le_advertisements_filter_policy = filter_policy; 5327 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5328 6); 5329 5330 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5331 hci_run(); 5332 } 5333 5334 /** 5335 * @brief Enable/Disable Advertisements 5336 * @param enabled 5337 */ 5338 void gap_advertisements_enable(int enabled){ 5339 hci_stack->le_advertisements_enabled = enabled != 0; 5340 hci_update_advertisements_enabled_for_current_roles(); 5341 hci_run(); 5342 } 5343 5344 #endif 5345 5346 void hci_le_set_own_address_type(uint8_t own_address_type){ 5347 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5348 if (own_address_type == hci_stack->le_own_addr_type) return; 5349 hci_stack->le_own_addr_type = own_address_type; 5350 5351 #ifdef ENABLE_LE_PERIPHERAL 5352 // update advertisement parameters, too 5353 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5354 hci_run(); 5355 #endif 5356 #ifdef ENABLE_LE_CENTRAL 5357 // note: we don't update scan parameters or modify ongoing connection attempts 5358 #endif 5359 } 5360 5361 #endif 5362 5363 uint8_t gap_disconnect(hci_con_handle_t handle){ 5364 hci_connection_t * conn = hci_connection_for_handle(handle); 5365 if (!conn){ 5366 hci_emit_disconnection_complete(handle, 0); 5367 return 0; 5368 } 5369 // ignore if already disconnected 5370 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5371 return 0; 5372 } 5373 conn->state = SEND_DISCONNECT; 5374 hci_run(); 5375 return 0; 5376 } 5377 5378 int gap_read_rssi(hci_con_handle_t con_handle){ 5379 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5380 if (hci_connection == NULL) return 0; 5381 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5382 hci_run(); 5383 return 1; 5384 } 5385 5386 /** 5387 * @brief Get connection type 5388 * @param con_handle 5389 * @result connection_type 5390 */ 5391 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5392 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5393 if (!conn) return GAP_CONNECTION_INVALID; 5394 switch (conn->address_type){ 5395 case BD_ADDR_TYPE_LE_PUBLIC: 5396 case BD_ADDR_TYPE_LE_RANDOM: 5397 return GAP_CONNECTION_LE; 5398 case BD_ADDR_TYPE_SCO: 5399 return GAP_CONNECTION_SCO; 5400 case BD_ADDR_TYPE_ACL: 5401 return GAP_CONNECTION_ACL; 5402 default: 5403 return GAP_CONNECTION_INVALID; 5404 } 5405 } 5406 5407 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5408 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5409 if (!conn) return HCI_ROLE_INVALID; 5410 return (hci_role_t) conn->role; 5411 } 5412 5413 5414 #ifdef ENABLE_CLASSIC 5415 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5416 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5417 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5418 conn->request_role = role; 5419 hci_run(); 5420 return ERROR_CODE_SUCCESS; 5421 } 5422 #endif 5423 5424 #ifdef ENABLE_BLE 5425 5426 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5427 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5428 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5429 5430 conn->le_phy_update_all_phys = all_phys; 5431 conn->le_phy_update_tx_phys = tx_phys; 5432 conn->le_phy_update_rx_phys = rx_phys; 5433 conn->le_phy_update_phy_options = phy_options; 5434 5435 hci_run(); 5436 5437 return 0; 5438 } 5439 5440 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5441 // check if already in list 5442 btstack_linked_list_iterator_t it; 5443 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5444 while (btstack_linked_list_iterator_has_next(&it)) { 5445 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5446 if (entry->address_type != address_type) { 5447 continue; 5448 } 5449 if (memcmp(entry->address, address, 6) != 0) { 5450 continue; 5451 } 5452 // already in there 5453 return ERROR_CODE_COMMAND_DISALLOWED; 5454 } 5455 // alloc and add to list 5456 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5457 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5458 entry->address_type = address_type; 5459 (void)memcpy(entry->address, address, 6); 5460 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5461 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5462 return ERROR_CODE_SUCCESS; 5463 } 5464 5465 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5466 btstack_linked_list_iterator_t it; 5467 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5468 while (btstack_linked_list_iterator_has_next(&it)){ 5469 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5470 if (entry->address_type != address_type) { 5471 continue; 5472 } 5473 if (memcmp(entry->address, address, 6) != 0) { 5474 continue; 5475 } 5476 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5477 // remove from controller if already present 5478 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5479 } else { 5480 // directly remove entry from whitelist 5481 btstack_linked_list_iterator_remove(&it); 5482 btstack_memory_whitelist_entry_free(entry); 5483 } 5484 return ERROR_CODE_SUCCESS; 5485 } 5486 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5487 } 5488 5489 static void hci_whitelist_clear(void){ 5490 btstack_linked_list_iterator_t it; 5491 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5492 while (btstack_linked_list_iterator_has_next(&it)){ 5493 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5494 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5495 // remove from controller if already present 5496 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5497 continue; 5498 } 5499 // directly remove entry from whitelist 5500 btstack_linked_list_iterator_remove(&it); 5501 btstack_memory_whitelist_entry_free(entry); 5502 } 5503 } 5504 5505 /** 5506 * @brief Clear Whitelist 5507 * @returns 0 if ok 5508 */ 5509 uint8_t gap_whitelist_clear(void){ 5510 hci_whitelist_clear(); 5511 hci_run(); 5512 return ERROR_CODE_SUCCESS; 5513 } 5514 5515 /** 5516 * @brief Add Device to Whitelist 5517 * @param address_typ 5518 * @param address 5519 * @returns 0 if ok 5520 */ 5521 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5522 uint8_t status = hci_whitelist_add(address_type, address); 5523 if (status){ 5524 return status; 5525 } 5526 hci_run(); 5527 return ERROR_CODE_SUCCESS; 5528 } 5529 5530 /** 5531 * @brief Remove Device from Whitelist 5532 * @param address_typ 5533 * @param address 5534 * @returns 0 if ok 5535 */ 5536 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5537 uint8_t status = hci_whitelist_remove(address_type, address); 5538 if (status){ 5539 return status; 5540 } 5541 hci_run(); 5542 return ERROR_CODE_SUCCESS; 5543 } 5544 5545 #ifdef ENABLE_LE_CENTRAL 5546 /** 5547 * @brief Connect with Whitelist 5548 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5549 * @returns - if ok 5550 */ 5551 uint8_t gap_connect_with_whitelist(void){ 5552 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5553 return ERROR_CODE_COMMAND_DISALLOWED; 5554 } 5555 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5556 hci_run(); 5557 return ERROR_CODE_SUCCESS; 5558 } 5559 5560 /** 5561 * @brief Auto Connection Establishment - Start Connecting to device 5562 * @param address_typ 5563 * @param address 5564 * @returns 0 if ok 5565 */ 5566 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5567 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5568 return ERROR_CODE_COMMAND_DISALLOWED; 5569 } 5570 5571 uint8_t status = hci_whitelist_add(address_type, address); 5572 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5573 return status; 5574 } 5575 5576 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5577 5578 hci_run(); 5579 return ERROR_CODE_SUCCESS; 5580 } 5581 5582 /** 5583 * @brief Auto Connection Establishment - Stop Connecting to device 5584 * @param address_typ 5585 * @param address 5586 * @returns 0 if ok 5587 */ 5588 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5589 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5590 return ERROR_CODE_COMMAND_DISALLOWED; 5591 } 5592 5593 hci_whitelist_remove(address_type, address); 5594 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5595 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5596 } 5597 hci_run(); 5598 return 0; 5599 } 5600 5601 /** 5602 * @brief Auto Connection Establishment - Stop everything 5603 * @note Convenience function to stop all active auto connection attempts 5604 */ 5605 uint8_t gap_auto_connection_stop_all(void){ 5606 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5607 return ERROR_CODE_COMMAND_DISALLOWED; 5608 } 5609 hci_whitelist_clear(); 5610 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5611 hci_run(); 5612 return ERROR_CODE_SUCCESS; 5613 } 5614 5615 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5616 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5617 if (!conn) return 0; 5618 return conn->le_connection_interval; 5619 } 5620 #endif 5621 #endif 5622 5623 #ifdef ENABLE_CLASSIC 5624 /** 5625 * @brief Set Extended Inquiry Response data 5626 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5627 * @note has to be done before stack starts up 5628 */ 5629 void gap_set_extended_inquiry_response(const uint8_t * data){ 5630 hci_stack->eir_data = data; 5631 } 5632 5633 /** 5634 * @brief Start GAP Classic Inquiry 5635 * @param duration in 1.28s units 5636 * @return 0 if ok 5637 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5638 */ 5639 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5640 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5641 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5642 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5643 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5644 } 5645 hci_stack->inquiry_state = duration_in_1280ms_units; 5646 hci_run(); 5647 return 0; 5648 } 5649 5650 /** 5651 * @brief Stop GAP Classic Inquiry 5652 * @returns 0 if ok 5653 */ 5654 int gap_inquiry_stop(void){ 5655 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5656 // emit inquiry complete event, before it even started 5657 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5658 hci_emit_event(event, sizeof(event), 1); 5659 return 0; 5660 } 5661 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5662 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5663 hci_run(); 5664 return 0; 5665 } 5666 5667 5668 /** 5669 * @brief Remote Name Request 5670 * @param addr 5671 * @param page_scan_repetition_mode 5672 * @param clock_offset only used when bit 15 is set 5673 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5674 */ 5675 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5676 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5677 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5678 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5679 hci_stack->remote_name_clock_offset = clock_offset; 5680 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5681 hci_run(); 5682 return 0; 5683 } 5684 5685 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5686 hci_stack->gap_pairing_state = state; 5687 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5688 hci_run(); 5689 return 0; 5690 } 5691 5692 /** 5693 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5694 * @param addr 5695 * @param pin_data 5696 * @param pin_len 5697 * @return 0 if ok 5698 */ 5699 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5700 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5701 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5702 hci_stack->gap_pairing_pin_len = pin_len; 5703 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5704 } 5705 5706 /** 5707 * @brief Legacy Pairing Pin Code Response 5708 * @param addr 5709 * @param pin 5710 * @return 0 if ok 5711 */ 5712 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5713 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5714 } 5715 5716 /** 5717 * @brief Abort Legacy Pairing 5718 * @param addr 5719 * @param pin 5720 * @return 0 if ok 5721 */ 5722 int gap_pin_code_negative(bd_addr_t addr){ 5723 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5724 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5725 } 5726 5727 /** 5728 * @brief SSP Passkey Response 5729 * @param addr 5730 * @param passkey 5731 * @return 0 if ok 5732 */ 5733 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5734 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5735 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5736 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5737 } 5738 5739 /** 5740 * @brief Abort SSP Passkey Entry/Pairing 5741 * @param addr 5742 * @param pin 5743 * @return 0 if ok 5744 */ 5745 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5746 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5747 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5748 } 5749 5750 /** 5751 * @brief Accept SSP Numeric Comparison 5752 * @param addr 5753 * @param passkey 5754 * @return 0 if ok 5755 */ 5756 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5757 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5758 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5759 } 5760 5761 /** 5762 * @brief Abort SSP Numeric Comparison/Pairing 5763 * @param addr 5764 * @param pin 5765 * @return 0 if ok 5766 */ 5767 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5768 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5769 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5770 } 5771 5772 /** 5773 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5774 * @param inquiry_mode see bluetooth_defines.h 5775 */ 5776 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5777 hci_stack->inquiry_mode = mode; 5778 } 5779 5780 /** 5781 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5782 */ 5783 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5784 hci_stack->sco_voice_setting = voice_setting; 5785 } 5786 5787 /** 5788 * @brief Get SCO Voice Setting 5789 * @return current voice setting 5790 */ 5791 uint16_t hci_get_sco_voice_setting(void){ 5792 return hci_stack->sco_voice_setting; 5793 } 5794 5795 static int hci_have_usb_transport(void){ 5796 if (!hci_stack->hci_transport) return 0; 5797 const char * transport_name = hci_stack->hci_transport->name; 5798 if (!transport_name) return 0; 5799 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5800 } 5801 5802 /** @brief Get SCO packet length for current SCO Voice setting 5803 * @note Using SCO packets of the exact length is required for USB transfer 5804 * @return Length of SCO packets in bytes (not audio frames) 5805 */ 5806 int hci_get_sco_packet_length(void){ 5807 int sco_packet_length = 0; 5808 5809 #ifdef ENABLE_SCO_OVER_HCI 5810 5811 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5812 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5813 5814 if (hci_have_usb_transport()){ 5815 // see Core Spec for H2 USB Transfer. 5816 // 3 byte SCO header + 24 bytes per connection 5817 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5818 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5819 } else { 5820 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5821 sco_packet_length = 3 + 60 * multiplier; 5822 // assert that it still fits inside an SCO buffer 5823 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5824 sco_packet_length = 3 + 60; 5825 } 5826 } 5827 #endif 5828 return sco_packet_length; 5829 } 5830 5831 /** 5832 * @brief Sets the master/slave policy 5833 * @param policy (0: attempt to become master, 1: let connecting device decide) 5834 */ 5835 void hci_set_master_slave_policy(uint8_t policy){ 5836 hci_stack->master_slave_policy = policy; 5837 } 5838 5839 #endif 5840 5841 HCI_STATE hci_get_state(void){ 5842 return hci_stack->state; 5843 } 5844 5845 #ifdef ENABLE_CLASSIC 5846 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5847 hci_stack->gap_classic_accept_callback = accept_callback; 5848 } 5849 #endif 5850 5851 /** 5852 * @brief Set callback for Bluetooth Hardware Error 5853 */ 5854 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5855 hci_stack->hardware_error_callback = fn; 5856 } 5857 5858 void hci_disconnect_all(void){ 5859 btstack_linked_list_iterator_t it; 5860 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5861 while (btstack_linked_list_iterator_has_next(&it)){ 5862 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5863 if (con->state == SENT_DISCONNECT) continue; 5864 con->state = SEND_DISCONNECT; 5865 } 5866 hci_run(); 5867 } 5868 5869 uint16_t hci_get_manufacturer(void){ 5870 return hci_stack->manufacturer; 5871 } 5872 5873 #ifdef ENABLE_BLE 5874 5875 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5876 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5877 if (!hci_con) return NULL; 5878 return &hci_con->sm_connection; 5879 } 5880 5881 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5882 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5883 5884 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5885 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5886 if (hci_connection == NULL) return 0; 5887 if (hci_is_le_connection(hci_connection)){ 5888 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5889 if (sm_conn->sm_connection_encrypted) { 5890 return sm_conn->sm_actual_encryption_key_size; 5891 } 5892 } 5893 #ifdef ENABLE_CLASSIC 5894 else { 5895 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5896 return hci_connection->encryption_key_size; 5897 } 5898 } 5899 #endif 5900 return 0; 5901 } 5902 5903 int gap_authenticated(hci_con_handle_t con_handle){ 5904 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5905 if (hci_connection == NULL) return 0; 5906 5907 switch (hci_connection->address_type){ 5908 case BD_ADDR_TYPE_LE_PUBLIC: 5909 case BD_ADDR_TYPE_LE_RANDOM: 5910 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5911 return hci_connection->sm_connection.sm_connection_authenticated; 5912 #ifdef ENABLE_CLASSIC 5913 case BD_ADDR_TYPE_SCO: 5914 case BD_ADDR_TYPE_ACL: 5915 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5916 #endif 5917 default: 5918 return 0; 5919 } 5920 } 5921 5922 int gap_secure_connection(hci_con_handle_t con_handle){ 5923 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5924 if (hci_connection == NULL) return 0; 5925 5926 switch (hci_connection->address_type){ 5927 case BD_ADDR_TYPE_LE_PUBLIC: 5928 case BD_ADDR_TYPE_LE_RANDOM: 5929 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5930 return hci_connection->sm_connection.sm_connection_sc; 5931 #ifdef ENABLE_CLASSIC 5932 case BD_ADDR_TYPE_SCO: 5933 case BD_ADDR_TYPE_ACL: 5934 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5935 #endif 5936 default: 5937 return 0; 5938 } 5939 } 5940 5941 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5942 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5943 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5944 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5945 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5946 return sm_conn->sm_connection_authorization_state; 5947 } 5948 #endif 5949 5950 #ifdef ENABLE_CLASSIC 5951 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 5952 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5953 if (!conn) return GAP_CONNECTION_INVALID; 5954 conn->sniff_min_interval = sniff_min_interval; 5955 conn->sniff_max_interval = sniff_max_interval; 5956 conn->sniff_attempt = sniff_attempt; 5957 conn->sniff_timeout = sniff_timeout; 5958 hci_run(); 5959 return 0; 5960 } 5961 5962 /** 5963 * @brief Exit Sniff mode 5964 * @param con_handle 5965 @ @return 0 if ok 5966 */ 5967 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5968 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5969 if (!conn) return GAP_CONNECTION_INVALID; 5970 conn->sniff_min_interval = 0xffff; 5971 hci_run(); 5972 return 0; 5973 } 5974 #endif 5975 5976 void hci_halting_defer(void){ 5977 if (hci_stack->state != HCI_STATE_HALTING) return; 5978 switch (hci_stack->substate){ 5979 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5980 case HCI_HALTING_CLOSE: 5981 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5982 break; 5983 default: 5984 break; 5985 } 5986 } 5987 5988 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5989 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 5990 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 5991 if (le_device_db_index >= le_device_db_max_count()) return; 5992 uint8_t offset = le_device_db_index >> 3; 5993 uint8_t mask = 1 << (le_device_db_index & 7); 5994 hci_stack->le_resolving_list_add_entries[offset] |= mask; 5995 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 5996 // note: go back to remove entries, otherwise, a remove + add will skip the add 5997 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5998 } 5999 } 6000 6001 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6002 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6003 if (le_device_db_index >= le_device_db_max_count()) return; 6004 uint8_t offset = le_device_db_index >> 3; 6005 uint8_t mask = 1 << (le_device_db_index & 7); 6006 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6007 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6008 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6009 } 6010 } 6011 6012 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6013 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6014 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6015 } 6016 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6017 // restart le resolving list update 6018 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6019 } 6020 return ERROR_CODE_SUCCESS; 6021 } 6022 #endif 6023 6024 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6025 void hci_setup_test_connections_fuzz(void){ 6026 hci_connection_t * conn; 6027 6028 // default address: 66:55:44:33:00:01 6029 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6030 6031 // setup Controller info 6032 hci_stack->num_cmd_packets = 255; 6033 hci_stack->acl_packets_total_num = 255; 6034 6035 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6036 addr[5] = 0x01; 6037 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6038 conn->con_handle = addr[5]; 6039 conn->role = HCI_ROLE_SLAVE; 6040 conn->state = RECEIVED_CONNECTION_REQUEST; 6041 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6042 6043 // setup incoming Classic SCO connection with con handle 0x0002 6044 addr[5] = 0x02; 6045 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6046 conn->con_handle = addr[5]; 6047 conn->role = HCI_ROLE_SLAVE; 6048 conn->state = RECEIVED_CONNECTION_REQUEST; 6049 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6050 6051 // setup ready Classic ACL connection with con handle 0x0003 6052 addr[5] = 0x03; 6053 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6054 conn->con_handle = addr[5]; 6055 conn->role = HCI_ROLE_SLAVE; 6056 conn->state = OPEN; 6057 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6058 6059 // setup ready Classic SCO connection with con handle 0x0004 6060 addr[5] = 0x04; 6061 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6062 conn->con_handle = addr[5]; 6063 conn->role = HCI_ROLE_SLAVE; 6064 conn->state = OPEN; 6065 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6066 6067 // setup ready LE ACL connection with con handle 0x005 and public address 6068 addr[5] = 0x05; 6069 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6070 conn->con_handle = addr[5]; 6071 conn->role = HCI_ROLE_SLAVE; 6072 conn->state = OPEN; 6073 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6074 } 6075 6076 void hci_free_connections_fuzz(void){ 6077 btstack_linked_list_iterator_t it; 6078 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6079 while (btstack_linked_list_iterator_has_next(&it)){ 6080 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6081 btstack_linked_list_iterator_remove(&it); 6082 btstack_memory_hci_connection_free(con); 6083 } 6084 } 6085 void hci_simulate_working_fuzz(void){ 6086 hci_init_done(); 6087 hci_stack->num_cmd_packets = 255; 6088 } 6089 #endif 6090