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 BLUEKITCHEN 24 * GMBH 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 ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 // currently stored in 32-bit variable 143 #define SUPPORTED_HCI_COMMANDS \ 144 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 145 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 146 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 147 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 148 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 149 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 151 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 152 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 153 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 154 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 156 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 157 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 158 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 159 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 160 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 161 162 // enumerate supported commands 163 #define X(name, offset, bit) name, 164 enum { 165 SUPPORTED_HCI_COMMANDS 166 SUPPORTED_HCI_COMMANDS_COUNT 167 }; 168 #undef X 169 170 // prototypes 171 #ifdef ENABLE_CLASSIC 172 static void hci_update_scan_enable(void); 173 static void hci_emit_discoverable_enabled(uint8_t enabled); 174 static int hci_local_ssp_activated(void); 175 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 176 static bool hci_ssp_supported(hci_connection_t * connection); 177 static void hci_notify_if_sco_can_send_now(void); 178 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 179 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 180 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 181 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 182 static void hci_connection_timestamp(hci_connection_t *connection); 183 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 184 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 185 #endif 186 187 static int hci_power_control_on(void); 188 static void hci_power_control_off(void); 189 static void hci_state_reset(void); 190 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 191 static void hci_emit_transport_packet_sent(void); 192 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 193 static void hci_emit_nr_connections_changed(void); 194 static void hci_emit_hci_open_failed(void); 195 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 196 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 197 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 198 static void hci_run(void); 199 static int hci_is_le_connection(hci_connection_t * connection); 200 201 #ifdef ENABLE_CLASSIC 202 static int hci_have_usb_transport(void); 203 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 204 #endif 205 206 #ifdef ENABLE_BLE 207 #ifdef ENABLE_LE_CENTRAL 208 // called from test/ble_client/advertising_data_parser.c 209 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 210 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 211 static void hci_whitelist_free(void); 212 static hci_connection_t * gap_get_outgoing_connection(void); 213 static void hci_le_scan_stop(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #ifdef ENABLE_LE_PERIPHERAL 217 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 218 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 219 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 220 #endif /* ENABLE_LE_PERIPHERAL */ 221 #endif /* ENABLE_BLE */ 222 223 // the STACK is here 224 #ifndef HAVE_MALLOC 225 static hci_stack_t hci_stack_static; 226 #endif 227 static hci_stack_t * hci_stack = NULL; 228 229 #ifdef ENABLE_CLASSIC 230 // default name 231 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 232 233 // test helper 234 static uint8_t disable_l2cap_timeouts = 0; 235 #endif 236 237 // reset connection state on create and on reconnect 238 // don't overwrite addr, con handle, role 239 static void hci_connection_init(hci_connection_t * conn){ 240 conn->authentication_flags = AUTH_FLAG_NONE; 241 conn->bonding_flags = 0; 242 conn->requested_security_level = LEVEL_0; 243 #ifdef ENABLE_CLASSIC 244 conn->request_role = HCI_ROLE_INVALID; 245 conn->sniff_subrating_max_latency = 0xffff; 246 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 247 conn->link_key_type = INVALID_LINK_KEY; 248 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 249 btstack_run_loop_set_timer_context(&conn->timeout, conn); 250 hci_connection_timestamp(conn); 251 #endif 252 conn->acl_recombination_length = 0; 253 conn->acl_recombination_pos = 0; 254 conn->num_packets_sent = 0; 255 256 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 257 #ifdef ENABLE_BLE 258 conn->le_phy_update_all_phys = 0xff; 259 #endif 260 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 261 conn->le_max_tx_octets = 27; 262 #endif 263 #ifdef ENABLE_CLASSIC_PAIRING_OOB 264 conn->classic_oob_c_192 = NULL; 265 conn->classic_oob_r_192 = NULL; 266 conn->classic_oob_c_256 = NULL; 267 conn->classic_oob_r_256 = NULL; 268 #endif 269 } 270 271 /** 272 * create connection for given address 273 * 274 * @return connection OR NULL, if no memory left 275 */ 276 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 277 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 278 279 hci_connection_t * conn = btstack_memory_hci_connection_get(); 280 if (!conn) return NULL; 281 hci_connection_init(conn); 282 283 bd_addr_copy(conn->address, addr); 284 conn->address_type = addr_type; 285 conn->con_handle = HCI_CON_HANDLE_INVALID; 286 conn->role = HCI_ROLE_INVALID; 287 288 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 289 290 return conn; 291 } 292 293 294 /** 295 * get le connection parameter range 296 * 297 * @return le connection parameter range struct 298 */ 299 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 300 *range = hci_stack->le_connection_parameter_range; 301 } 302 303 /** 304 * set le connection parameter range 305 * 306 */ 307 308 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 309 hci_stack->le_connection_parameter_range = *range; 310 } 311 312 /** 313 * @brief Test if connection parameters are inside in existing rage 314 * @param conn_interval_min (unit: 1.25ms) 315 * @param conn_interval_max (unit: 1.25ms) 316 * @param conn_latency 317 * @param supervision_timeout (unit: 10ms) 318 * @return 1 if included 319 */ 320 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){ 321 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 322 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 323 324 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 325 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 326 327 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 328 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 329 330 return 1; 331 } 332 333 /** 334 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 335 * @note: default: 1 336 * @param max_peripheral_connections 337 */ 338 #ifdef ENABLE_LE_PERIPHERAL 339 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 340 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 341 } 342 #endif 343 344 /** 345 * get hci connections iterator 346 * 347 * @return hci connections iterator 348 */ 349 350 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 351 btstack_linked_list_iterator_init(it, &hci_stack->connections); 352 } 353 354 /** 355 * get connection for a given handle 356 * 357 * @return connection OR NULL, if not found 358 */ 359 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 360 btstack_linked_list_iterator_t it; 361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 362 while (btstack_linked_list_iterator_has_next(&it)){ 363 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 364 if ( item->con_handle == con_handle ) { 365 return item; 366 } 367 } 368 return NULL; 369 } 370 371 /** 372 * get connection for given address 373 * 374 * @return connection OR NULL, if not found 375 */ 376 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 377 btstack_linked_list_iterator_t it; 378 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 379 while (btstack_linked_list_iterator_has_next(&it)){ 380 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 381 if (connection->address_type != addr_type) continue; 382 if (memcmp(addr, connection->address, 6) != 0) continue; 383 return connection; 384 } 385 return NULL; 386 } 387 388 #ifdef ENABLE_CLASSIC 389 390 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 391 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 392 } 393 394 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 395 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 396 } 397 398 #ifdef ENABLE_SCO_OVER_HCI 399 static int hci_number_sco_connections(void){ 400 int connections = 0; 401 btstack_linked_list_iterator_t it; 402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 403 while (btstack_linked_list_iterator_has_next(&it)){ 404 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 405 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 406 connections++; 407 } 408 return connections; 409 } 410 #endif 411 412 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 413 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 414 #ifdef HAVE_EMBEDDED_TICK 415 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #else 420 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 421 // connections might be timed out 422 hci_emit_l2cap_check_timeout(connection); 423 } 424 #endif 425 } 426 427 static void hci_connection_timestamp(hci_connection_t *connection){ 428 #ifdef HAVE_EMBEDDED_TICK 429 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 430 #else 431 connection->timestamp = btstack_run_loop_get_time_ms(); 432 #endif 433 } 434 435 /** 436 * add authentication flags and reset timer 437 * @note: assumes classic connection 438 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 439 */ 440 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 441 bd_addr_t addr; 442 reverse_bd_addr(bd_addr, addr); 443 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 444 if (conn) { 445 connectionSetAuthenticationFlags(conn, flags); 446 hci_connection_timestamp(conn); 447 } 448 } 449 450 static bool hci_pairing_active(hci_connection_t * hci_connection){ 451 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 452 } 453 454 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 455 if (hci_pairing_active(hci_connection)) return; 456 if (ssp){ 457 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 458 } else { 459 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 460 } 461 // if we are initiator, we have sent an HCI Authenticate Request 462 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 463 464 // if we are responder, use minimal service security level as required level 465 if (!initiator){ 466 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 467 } 468 469 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 470 471 uint8_t event[12]; 472 event[0] = GAP_EVENT_PAIRING_STARTED; 473 event[1] = 10; 474 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 475 reverse_bd_addr(hci_connection->address, &event[4]); 476 event[10] = (uint8_t) ssp; 477 event[11] = (uint8_t) initiator; 478 hci_emit_event(event, sizeof(event), 1); 479 } 480 481 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 482 hci_connection->requested_security_level = LEVEL_0; 483 if (!hci_pairing_active(hci_connection)) return; 484 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 485 #ifdef ENABLE_CLASSIC_PAIRING_OOB 486 hci_connection->classic_oob_c_192 = NULL; 487 hci_connection->classic_oob_r_192 = NULL; 488 hci_connection->classic_oob_c_256 = NULL; 489 hci_connection->classic_oob_r_256 = NULL; 490 #endif 491 log_info("pairing complete, status %02x", status); 492 493 uint8_t event[11]; 494 event[0] = GAP_EVENT_PAIRING_COMPLETE; 495 event[1] = 9; 496 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 497 reverse_bd_addr(hci_connection->address, &event[4]); 498 event[10] = status; 499 hci_emit_event(event, sizeof(event), 1); 500 501 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 502 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 503 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 504 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 505 hci_connection->bonding_status = status; 506 } 507 } 508 509 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 510 hci_connection_t * conn = hci_connection_for_handle(handle); 511 if (!conn) return false; 512 return hci_pairing_active(conn); 513 } 514 515 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 516 if (!hci_stack->link_key_db) return; 517 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 518 hci_stack->link_key_db->delete_link_key(addr); 519 } 520 521 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 522 if (!hci_stack->link_key_db) return; 523 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 524 hci_stack->link_key_db->put_link_key(addr, link_key, type); 525 } 526 527 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 528 if (!hci_stack->link_key_db) return false; 529 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 530 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 531 return result; 532 } 533 534 void gap_delete_all_link_keys(void){ 535 bd_addr_t addr; 536 link_key_t link_key; 537 link_key_type_t type; 538 btstack_link_key_iterator_t it; 539 int ok = gap_link_key_iterator_init(&it); 540 if (!ok) { 541 log_error("could not initialize iterator"); 542 return; 543 } 544 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 545 gap_drop_link_key_for_bd_addr(addr); 546 } 547 gap_link_key_iterator_done(&it); 548 } 549 550 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 551 if (!hci_stack->link_key_db) return 0; 552 if (!hci_stack->link_key_db->iterator_init) return 0; 553 return hci_stack->link_key_db->iterator_init(it); 554 } 555 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){ 556 if (!hci_stack->link_key_db) return 0; 557 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 558 } 559 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 560 if (!hci_stack->link_key_db) return; 561 hci_stack->link_key_db->iterator_done(it); 562 } 563 #endif 564 565 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 566 switch (address_type){ 567 case BD_ADDR_TYPE_LE_PUBLIC: 568 case BD_ADDR_TYPE_LE_RANDOM: 569 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 570 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 571 return true; 572 default: 573 return false; 574 } 575 } 576 577 static int hci_is_le_connection(hci_connection_t * connection){ 578 return hci_is_le_connection_type(connection->address_type); 579 } 580 581 /** 582 * count connections 583 */ 584 static int nr_hci_connections(void){ 585 int count = 0; 586 btstack_linked_item_t *it; 587 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 588 count++; 589 } 590 return count; 591 } 592 593 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 594 595 unsigned int num_packets_sent_classic = 0; 596 unsigned int num_packets_sent_le = 0; 597 598 btstack_linked_item_t *it; 599 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 600 hci_connection_t * connection = (hci_connection_t *) it; 601 if (hci_is_le_connection(connection)){ 602 num_packets_sent_le += connection->num_packets_sent; 603 } 604 if (connection->address_type == BD_ADDR_TYPE_ACL){ 605 num_packets_sent_classic += connection->num_packets_sent; 606 } 607 } 608 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 609 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 610 int free_slots_le = 0; 611 612 if (free_slots_classic < 0){ 613 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); 614 return 0; 615 } 616 617 if (hci_stack->le_acl_packets_total_num){ 618 // if we have LE slots, they are used 619 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 620 if (free_slots_le < 0){ 621 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); 622 return 0; 623 } 624 } else { 625 // otherwise, classic slots are used for LE, too 626 free_slots_classic -= num_packets_sent_le; 627 if (free_slots_classic < 0){ 628 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); 629 return 0; 630 } 631 } 632 633 switch (address_type){ 634 case BD_ADDR_TYPE_UNKNOWN: 635 log_error("hci_number_free_acl_slots: unknown address type"); 636 return 0; 637 638 case BD_ADDR_TYPE_ACL: 639 return (uint16_t) free_slots_classic; 640 641 default: 642 if (hci_stack->le_acl_packets_total_num > 0){ 643 return (uint16_t) free_slots_le; 644 } 645 return (uint16_t) free_slots_classic; 646 } 647 } 648 649 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 650 // get connection type 651 hci_connection_t * connection = hci_connection_for_handle(con_handle); 652 if (!connection){ 653 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 654 return 0; 655 } 656 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 657 } 658 659 #ifdef ENABLE_CLASSIC 660 static int hci_number_free_sco_slots(void){ 661 unsigned int num_sco_packets_sent = 0; 662 btstack_linked_item_t *it; 663 if (hci_stack->synchronous_flow_control_enabled){ 664 // explicit flow control 665 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 666 hci_connection_t * connection = (hci_connection_t *) it; 667 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 668 num_sco_packets_sent += connection->num_packets_sent; 669 } 670 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 671 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 672 return 0; 673 } 674 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 675 } else { 676 // implicit flow control -- TODO 677 int num_ready = 0; 678 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 679 hci_connection_t * connection = (hci_connection_t *) it; 680 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 681 if (connection->sco_tx_ready == 0) continue; 682 num_ready++; 683 } 684 return num_ready; 685 } 686 } 687 #endif 688 689 // only used to send HCI Host Number Completed Packets 690 static int hci_can_send_comand_packet_transport(void){ 691 if (hci_stack->hci_packet_buffer_reserved) return 0; 692 693 // check for async hci transport implementations 694 if (hci_stack->hci_transport->can_send_packet_now){ 695 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 696 return 0; 697 } 698 } 699 return 1; 700 } 701 702 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 703 bool hci_can_send_command_packet_now(void){ 704 if (hci_can_send_comand_packet_transport() == 0) return false; 705 return hci_stack->num_cmd_packets > 0u; 706 } 707 708 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 709 // check for async hci transport implementations 710 if (!hci_stack->hci_transport->can_send_packet_now) return true; 711 return hci_stack->hci_transport->can_send_packet_now(packet_type); 712 } 713 714 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 715 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 716 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 717 } 718 719 bool hci_can_send_acl_le_packet_now(void){ 720 if (hci_stack->hci_packet_buffer_reserved) return false; 721 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 722 } 723 724 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 725 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 726 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 727 } 728 729 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 730 if (hci_stack->hci_packet_buffer_reserved) return false; 731 return hci_can_send_prepared_acl_packet_now(con_handle); 732 } 733 734 #ifdef ENABLE_CLASSIC 735 bool hci_can_send_acl_classic_packet_now(void){ 736 if (hci_stack->hci_packet_buffer_reserved) return false; 737 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 738 } 739 740 bool hci_can_send_prepared_sco_packet_now(void){ 741 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 742 if (hci_have_usb_transport()){ 743 return hci_stack->sco_can_send_now; 744 } else { 745 return hci_number_free_sco_slots() > 0; 746 } 747 } 748 749 bool hci_can_send_sco_packet_now(void){ 750 if (hci_stack->hci_packet_buffer_reserved) return false; 751 return hci_can_send_prepared_sco_packet_now(); 752 } 753 754 void hci_request_sco_can_send_now_event(void){ 755 hci_stack->sco_waiting_for_can_send_now = 1; 756 hci_notify_if_sco_can_send_now(); 757 } 758 #endif 759 760 // used for internal checks in l2cap.c 761 bool hci_is_packet_buffer_reserved(void){ 762 return hci_stack->hci_packet_buffer_reserved; 763 } 764 765 // reserves outgoing packet buffer. 766 // @return 1 if successful 767 bool hci_reserve_packet_buffer(void){ 768 if (hci_stack->hci_packet_buffer_reserved) { 769 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 770 return false; 771 } 772 hci_stack->hci_packet_buffer_reserved = true; 773 return true; 774 } 775 776 void hci_release_packet_buffer(void){ 777 hci_stack->hci_packet_buffer_reserved = false; 778 } 779 780 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 781 static int hci_transport_synchronous(void){ 782 return hci_stack->hci_transport->can_send_packet_now == NULL; 783 } 784 785 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 786 787 // 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); 788 789 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 790 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 791 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 792 max_acl_data_packet_length = hci_stack->le_data_packets_length; 793 } 794 795 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 796 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 797 max_acl_data_packet_length = connection->le_max_tx_octets; 798 } 799 #endif 800 801 log_debug("hci_send_acl_packet_fragments entered"); 802 803 uint8_t status = ERROR_CODE_SUCCESS; 804 // multiple packets could be send on a synchronous HCI transport 805 while (true){ 806 807 log_debug("hci_send_acl_packet_fragments loop entered"); 808 809 // get current data 810 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 811 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 812 bool more_fragments = false; 813 814 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 815 if (current_acl_data_packet_length > max_acl_data_packet_length){ 816 more_fragments = true; 817 current_acl_data_packet_length = max_acl_data_packet_length; 818 } 819 820 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 821 if (acl_header_pos > 0u){ 822 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 823 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 824 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 825 } 826 827 // update header len 828 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 829 830 // count packet 831 connection->num_packets_sent++; 832 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 833 834 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 835 if (more_fragments){ 836 // update start of next fragment to send 837 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 838 } else { 839 // done 840 hci_stack->acl_fragmentation_pos = 0; 841 hci_stack->acl_fragmentation_total_size = 0; 842 } 843 844 // send packet 845 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 846 const int size = current_acl_data_packet_length + 4; 847 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 848 hci_stack->acl_fragmentation_tx_active = 1; 849 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 850 if (err != 0){ 851 // no error from HCI Transport expected 852 status = ERROR_CODE_HARDWARE_FAILURE; 853 } 854 855 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 856 857 // done yet? 858 if (!more_fragments) break; 859 860 // can send more? 861 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 862 } 863 864 log_debug("hci_send_acl_packet_fragments loop over"); 865 866 // release buffer now for synchronous transport 867 if (hci_transport_synchronous()){ 868 hci_stack->acl_fragmentation_tx_active = 0; 869 hci_release_packet_buffer(); 870 hci_emit_transport_packet_sent(); 871 } 872 873 return status; 874 } 875 876 // pre: caller has reserved the packet buffer 877 uint8_t hci_send_acl_packet_buffer(int size){ 878 btstack_assert(hci_stack->hci_packet_buffer_reserved); 879 880 uint8_t * packet = hci_stack->hci_packet_buffer; 881 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 882 883 // check for free places on Bluetooth module 884 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 885 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return BTSTACK_ACL_BUFFERS_FULL; 889 } 890 891 hci_connection_t *connection = hci_connection_for_handle( con_handle); 892 if (!connection) { 893 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 894 hci_release_packet_buffer(); 895 hci_emit_transport_packet_sent(); 896 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 897 } 898 899 #ifdef ENABLE_CLASSIC 900 hci_connection_timestamp(connection); 901 #endif 902 903 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 904 905 // setup data 906 hci_stack->acl_fragmentation_total_size = size; 907 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 908 909 return hci_send_acl_packet_fragments(connection); 910 } 911 912 #ifdef ENABLE_CLASSIC 913 // pre: caller has reserved the packet buffer 914 uint8_t hci_send_sco_packet_buffer(int size){ 915 btstack_assert(hci_stack->hci_packet_buffer_reserved); 916 917 uint8_t * packet = hci_stack->hci_packet_buffer; 918 919 // skip checks in loopback mode 920 if (!hci_stack->loopback_mode){ 921 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 922 923 // check for free places on Bluetooth module 924 if (!hci_can_send_prepared_sco_packet_now()) { 925 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 926 hci_release_packet_buffer(); 927 hci_emit_transport_packet_sent(); 928 return BTSTACK_ACL_BUFFERS_FULL; 929 } 930 931 // track send packet in connection struct 932 hci_connection_t *connection = hci_connection_for_handle( con_handle); 933 if (!connection) { 934 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 935 hci_release_packet_buffer(); 936 hci_emit_transport_packet_sent(); 937 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 938 } 939 940 if (hci_have_usb_transport()){ 941 // token used 942 hci_stack->sco_can_send_now = false; 943 } else { 944 if (hci_stack->synchronous_flow_control_enabled){ 945 connection->num_packets_sent++; 946 } else { 947 connection->sco_tx_ready--; 948 } 949 } 950 } 951 952 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 953 954 #ifdef HAVE_SCO_TRANSPORT 955 hci_stack->sco_transport->send_packet(packet, size); 956 hci_release_packet_buffer(); 957 hci_emit_transport_packet_sent(); 958 959 return 0; 960 #else 961 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 962 if (hci_transport_synchronous()){ 963 hci_release_packet_buffer(); 964 hci_emit_transport_packet_sent(); 965 } 966 967 if (err != 0){ 968 return ERROR_CODE_HARDWARE_FAILURE; 969 } 970 return ERROR_CODE_SUCCESS; 971 #endif 972 } 973 #endif 974 975 static void acl_handler(uint8_t *packet, uint16_t size){ 976 977 // get info 978 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 979 hci_connection_t *conn = hci_connection_for_handle(con_handle); 980 uint8_t acl_flags = READ_ACL_FLAGS(packet); 981 uint16_t acl_length = READ_ACL_LENGTH(packet); 982 983 // ignore non-registered handle 984 if (!conn){ 985 log_error("acl_handler called with non-registered handle %u!" , con_handle); 986 return; 987 } 988 989 // assert packet is complete 990 if ((acl_length + 4u) != size){ 991 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 992 return; 993 } 994 995 #ifdef ENABLE_CLASSIC 996 // update idle timestamp 997 hci_connection_timestamp(conn); 998 #endif 999 1000 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1001 hci_stack->host_completed_packets = 1; 1002 conn->num_packets_completed++; 1003 #endif 1004 1005 // handle different packet types 1006 switch (acl_flags & 0x03u) { 1007 1008 case 0x01: // continuation fragment 1009 1010 // sanity checks 1011 if (conn->acl_recombination_pos == 0u) { 1012 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1013 return; 1014 } 1015 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1016 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1017 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1018 conn->acl_recombination_pos = 0; 1019 return; 1020 } 1021 1022 // append fragment payload (header already stored) 1023 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1024 &packet[4], acl_length); 1025 conn->acl_recombination_pos += acl_length; 1026 1027 // forward complete L2CAP packet if complete. 1028 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1029 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1030 // reset recombination buffer 1031 conn->acl_recombination_length = 0; 1032 conn->acl_recombination_pos = 0; 1033 } 1034 break; 1035 1036 case 0x02: { // first fragment 1037 1038 // sanity check 1039 if (conn->acl_recombination_pos) { 1040 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1041 conn->acl_recombination_pos = 0; 1042 } 1043 1044 // peek into L2CAP packet! 1045 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1046 1047 // compare fragment size to L2CAP packet size 1048 if (acl_length >= (l2cap_length + 4u)){ 1049 // forward fragment as L2CAP packet 1050 hci_emit_acl_packet(packet, acl_length + 4u); 1051 } else { 1052 1053 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1054 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1055 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1056 return; 1057 } 1058 1059 // store first fragment and tweak acl length for complete package 1060 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1061 packet, acl_length + 4u); 1062 conn->acl_recombination_pos = acl_length + 4u; 1063 conn->acl_recombination_length = l2cap_length; 1064 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1065 } 1066 break; 1067 1068 } 1069 default: 1070 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1071 return; 1072 } 1073 1074 // execute main loop 1075 hci_run(); 1076 } 1077 1078 static void hci_connection_stop_timer(hci_connection_t * conn){ 1079 btstack_run_loop_remove_timer(&conn->timeout); 1080 #ifdef ENABLE_CLASSIC 1081 btstack_run_loop_remove_timer(&conn->timeout_sco); 1082 #endif 1083 } 1084 1085 static void hci_shutdown_connection(hci_connection_t *conn){ 1086 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1087 1088 #ifdef ENABLE_CLASSIC 1089 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1090 bd_addr_type_t addr_type = conn->address_type; 1091 #endif 1092 #ifdef HAVE_SCO_TRANSPORT 1093 hci_con_handle_t con_handle = conn->con_handle; 1094 #endif 1095 #endif 1096 1097 hci_connection_stop_timer(conn); 1098 1099 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1100 btstack_memory_hci_connection_free( conn ); 1101 1102 // now it's gone 1103 hci_emit_nr_connections_changed(); 1104 1105 #ifdef ENABLE_CLASSIC 1106 #ifdef ENABLE_SCO_OVER_HCI 1107 // update SCO 1108 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1109 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1110 } 1111 #endif 1112 #ifdef HAVE_SCO_TRANSPORT 1113 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1114 hci_stack->sco_transport->close(con_handle); 1115 } 1116 #endif 1117 #endif 1118 } 1119 1120 #ifdef ENABLE_CLASSIC 1121 1122 static const uint16_t packet_type_sizes[] = { 1123 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1124 HCI_ACL_DH1_SIZE, 0, 0, 0, 1125 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1126 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1127 }; 1128 static const uint8_t packet_type_feature_requirement_bit[] = { 1129 0, // 3 slot packets 1130 1, // 5 slot packets 1131 25, // EDR 2 mpbs 1132 26, // EDR 3 mbps 1133 39, // 3 slot EDR packts 1134 40, // 5 slot EDR packet 1135 }; 1136 static const uint16_t packet_type_feature_packet_mask[] = { 1137 0x0f00, // 3 slot packets 1138 0xf000, // 5 slot packets 1139 0x1102, // EDR 2 mpbs 1140 0x2204, // EDR 3 mbps 1141 0x0300, // 3 slot EDR packts 1142 0x3000, // 5 slot EDR packet 1143 }; 1144 1145 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1146 // enable packet types based on size 1147 uint16_t packet_types = 0; 1148 unsigned int i; 1149 for (i=0;i<16;i++){ 1150 if (packet_type_sizes[i] == 0) continue; 1151 if (packet_type_sizes[i] <= buffer_size){ 1152 packet_types |= 1 << i; 1153 } 1154 } 1155 // disable packet types due to missing local supported features 1156 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1157 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1158 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1159 if (feature_set) continue; 1160 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1161 packet_types &= ~packet_type_feature_packet_mask[i]; 1162 } 1163 // flip bits for "may not be used" 1164 packet_types ^= 0x3306; 1165 return packet_types; 1166 } 1167 1168 uint16_t hci_usable_acl_packet_types(void){ 1169 return hci_stack->packet_types; 1170 } 1171 #endif 1172 1173 uint8_t* hci_get_outgoing_packet_buffer(void){ 1174 // hci packet buffer is >= acl data packet length 1175 return hci_stack->hci_packet_buffer; 1176 } 1177 1178 uint16_t hci_max_acl_data_packet_length(void){ 1179 return hci_stack->acl_data_packet_length; 1180 } 1181 1182 #ifdef ENABLE_CLASSIC 1183 bool hci_extended_sco_link_supported(void){ 1184 // No. 31, byte 3, bit 7 1185 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1186 } 1187 #endif 1188 1189 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1190 // No. 54, byte 6, bit 6 1191 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1192 } 1193 1194 #ifdef ENABLE_CLASSIC 1195 static int gap_ssp_supported(void){ 1196 // No. 51, byte 6, bit 3 1197 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1198 } 1199 #endif 1200 1201 static int hci_classic_supported(void){ 1202 #ifdef ENABLE_CLASSIC 1203 // No. 37, byte 4, bit 5, = No BR/EDR Support 1204 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1205 #else 1206 return 0; 1207 #endif 1208 } 1209 1210 static int hci_le_supported(void){ 1211 #ifdef ENABLE_BLE 1212 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1213 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1214 #else 1215 return 0; 1216 #endif 1217 } 1218 1219 static bool hci_command_supported(uint8_t command_index){ 1220 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1221 } 1222 1223 #ifdef ENABLE_BLE 1224 1225 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1226 static bool hci_extended_advertising_supported(void){ 1227 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1228 } 1229 #endif 1230 1231 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1232 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1233 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1234 } else { 1235 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1236 } 1237 } 1238 1239 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1240 *addr_type = hci_stack->le_own_addr_type; 1241 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1242 } 1243 1244 #ifdef ENABLE_LE_PERIPHERAL 1245 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1246 *addr_type = hci_stack->le_advertisements_own_addr_type; 1247 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1248 }; 1249 #endif 1250 1251 #ifdef ENABLE_LE_CENTRAL 1252 1253 /** 1254 * @brief Get own addr type and address used for LE connections (Central) 1255 */ 1256 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1257 *addr_type = hci_stack->le_connection_own_addr_type; 1258 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1259 } 1260 1261 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1262 1263 uint16_t offset = 3; 1264 uint8_t num_reports = packet[offset]; 1265 offset += 1; 1266 1267 uint16_t i; 1268 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1269 for (i=0; (i<num_reports) && (offset < size);i++){ 1270 // sanity checks on data_length: 1271 uint8_t data_length = packet[offset + 8]; 1272 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1273 if ((offset + 9u + data_length + 1u) > size) return; 1274 // setup event 1275 uint8_t event_size = 10u + data_length; 1276 uint16_t pos = 0; 1277 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1278 event[pos++] = event_size; 1279 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1280 offset += 8; 1281 pos += 8; 1282 event[pos++] = packet[offset + 1 + data_length]; // rssi 1283 event[pos++] = data_length; 1284 offset++; 1285 (void)memcpy(&event[pos], &packet[offset], data_length); 1286 pos += data_length; 1287 offset += data_length + 1u; // rssi 1288 hci_emit_event(event, pos, 1); 1289 } 1290 } 1291 1292 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1293 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1294 uint16_t offset = 3; 1295 uint8_t num_reports = packet[offset++]; 1296 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1297 uint8_t i; 1298 for (i=0; (i<num_reports) && (offset < size);i++){ 1299 // sanity checks on data_length: 1300 uint16_t data_length = packet[offset + 23]; 1301 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1302 if ((offset + 24u + data_length) > size) return; 1303 uint16_t event_type = little_endian_read_16(packet, offset); 1304 offset += 2; 1305 if ((event_type & 0x10) != 0) { 1306 // setup legacy event 1307 uint8_t legacy_event_type; 1308 switch (event_type){ 1309 case 0b0010011: 1310 // ADV_IND 1311 legacy_event_type = 0; 1312 break; 1313 case 0b0010101: 1314 // ADV_DIRECT_IND 1315 legacy_event_type = 1; 1316 break; 1317 case 0b0010010: 1318 // ADV_SCAN_IND 1319 legacy_event_type = 2; 1320 break; 1321 case 0b0010000: 1322 // ADV_NONCONN_IND 1323 legacy_event_type = 3; 1324 break; 1325 case 0b0011011: 1326 case 0b0011010: 1327 // SCAN_RSP 1328 legacy_event_type = 4; 1329 break; 1330 default: 1331 legacy_event_type = 0; 1332 break; 1333 } 1334 uint16_t pos = 0; 1335 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1336 event[pos++] = 10u + data_length; 1337 event[pos++] = legacy_event_type; 1338 // copy address type + address 1339 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1340 offset += 7; 1341 pos += 7; 1342 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1343 offset += 4; 1344 // copy rssi 1345 event[pos++] = packet[offset++]; 1346 // skip periodic advertising interval and direct address 1347 offset += 9; 1348 // copy data len + data; 1349 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1350 pos += 1 +data_length; 1351 offset += 1+ data_length; 1352 hci_emit_event(event, pos, 1); 1353 } else { 1354 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1355 uint8_t report_len = 24 + data_length; 1356 event[1] = report_len; 1357 little_endian_store_16(event, 2, event_type); 1358 memcpy(&event[4], &packet[offset], report_len); 1359 offset += report_len; 1360 hci_emit_event(event, 2 + report_len, 1); 1361 } 1362 } 1363 } 1364 #endif 1365 1366 #endif 1367 #endif 1368 1369 #ifdef ENABLE_BLE 1370 #ifdef ENABLE_LE_PERIPHERAL 1371 static void hci_update_advertisements_enabled_for_current_roles(void){ 1372 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1373 // get number of active le slave connections 1374 int num_slave_connections = 0; 1375 btstack_linked_list_iterator_t it; 1376 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1377 while (btstack_linked_list_iterator_has_next(&it)){ 1378 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1379 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1380 if (con->state != OPEN) continue; 1381 if (con->role != HCI_ROLE_SLAVE) continue; 1382 if (!hci_is_le_connection(con)) continue; 1383 num_slave_connections++; 1384 } 1385 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1386 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1387 } else { 1388 hci_stack->le_advertisements_enabled_for_current_roles = false; 1389 } 1390 } 1391 #endif 1392 #endif 1393 1394 #ifdef ENABLE_CLASSIC 1395 static void gap_run_set_local_name(void){ 1396 hci_reserve_packet_buffer(); 1397 uint8_t * packet = hci_stack->hci_packet_buffer; 1398 // construct HCI Command and send 1399 uint16_t opcode = hci_write_local_name.opcode; 1400 hci_stack->last_cmd_opcode = opcode; 1401 packet[0] = opcode & 0xff; 1402 packet[1] = opcode >> 8; 1403 packet[2] = DEVICE_NAME_LEN; 1404 memset(&packet[3], 0, DEVICE_NAME_LEN); 1405 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1406 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1407 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1408 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1409 // expand '00:00:00:00:00:00' in name with bd_addr 1410 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1411 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1412 } 1413 1414 static void gap_run_set_eir_data(void){ 1415 hci_reserve_packet_buffer(); 1416 uint8_t * packet = hci_stack->hci_packet_buffer; 1417 // construct HCI Command in-place and send 1418 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1419 hci_stack->last_cmd_opcode = opcode; 1420 uint16_t offset = 0; 1421 packet[offset++] = opcode & 0xff; 1422 packet[offset++] = opcode >> 8; 1423 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1424 packet[offset++] = 0; // FEC not required 1425 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1426 if (hci_stack->eir_data){ 1427 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1428 ad_context_t context; 1429 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1430 uint8_t data_type = ad_iterator_get_data_type(&context); 1431 uint8_t size = ad_iterator_get_data_len(&context); 1432 const uint8_t *data = ad_iterator_get_data(&context); 1433 // copy item 1434 packet[offset++] = size + 1; 1435 packet[offset++] = data_type; 1436 memcpy(&packet[offset], data, size); 1437 // update name item 1438 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1439 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1440 } 1441 offset += size; 1442 } 1443 } else { 1444 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1445 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1446 packet[offset++] = bytes_to_copy + 1; 1447 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1448 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1449 // expand '00:00:00:00:00:00' in name with bd_addr 1450 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1451 } 1452 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1453 } 1454 1455 static void hci_run_gap_tasks_classic(void){ 1456 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1457 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1458 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1459 return; 1460 } 1461 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1462 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1463 gap_run_set_local_name(); 1464 return; 1465 } 1466 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1467 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1468 gap_run_set_eir_data(); 1469 return; 1470 } 1471 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1472 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1473 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1474 return; 1475 } 1476 // write page scan activity 1477 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1478 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1479 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1480 return; 1481 } 1482 // write page scan type 1483 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1484 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1485 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1486 return; 1487 } 1488 // write page timeout 1489 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1490 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1491 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1492 return; 1493 } 1494 // send scan enable 1495 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1496 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1497 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1498 return; 1499 } 1500 // send write scan activity 1501 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1502 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1503 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1504 return; 1505 } 1506 } 1507 #endif 1508 1509 #ifndef HAVE_HOST_CONTROLLER_API 1510 1511 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1512 if (!hci_stack->config) return 0; 1513 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1514 // Limit baud rate for Broadcom chipsets to 3 mbps 1515 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1516 baud_rate = 3000000; 1517 } 1518 return baud_rate; 1519 } 1520 1521 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1522 UNUSED(ds); 1523 1524 switch (hci_stack->substate){ 1525 case HCI_INIT_W4_SEND_RESET: 1526 log_info("Resend HCI Reset"); 1527 hci_stack->substate = HCI_INIT_SEND_RESET; 1528 hci_stack->num_cmd_packets = 1; 1529 hci_run(); 1530 break; 1531 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1532 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1533 if (hci_stack->hci_transport->reset_link){ 1534 hci_stack->hci_transport->reset_link(); 1535 } 1536 1537 /* fall through */ 1538 1539 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1540 log_info("Resend HCI Reset - CSR Warm Boot"); 1541 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1542 hci_stack->num_cmd_packets = 1; 1543 hci_run(); 1544 break; 1545 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1546 if (hci_stack->hci_transport->set_baudrate){ 1547 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1548 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1549 hci_stack->hci_transport->set_baudrate(baud_rate); 1550 } 1551 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1552 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1553 if (hci_stack->hci_transport->reset_link){ 1554 log_info("Link Reset"); 1555 hci_stack->hci_transport->reset_link(); 1556 } 1557 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1558 hci_run(); 1559 } 1560 break; 1561 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1562 // otherwise continue 1563 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1564 hci_send_cmd(&hci_read_local_supported_commands); 1565 break; 1566 default: 1567 break; 1568 } 1569 } 1570 #endif 1571 1572 static void hci_initializing_next_state(void){ 1573 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1574 } 1575 1576 static void hci_init_done(void){ 1577 // done. tell the app 1578 log_info("hci_init_done -> HCI_STATE_WORKING"); 1579 hci_stack->state = HCI_STATE_WORKING; 1580 hci_emit_state(); 1581 } 1582 1583 // assumption: hci_can_send_command_packet_now() == true 1584 static void hci_initializing_run(void){ 1585 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1586 1587 if (!hci_can_send_command_packet_now()) return; 1588 1589 #ifndef HAVE_HOST_CONTROLLER_API 1590 bool need_baud_change = hci_stack->config 1591 && hci_stack->chipset 1592 && hci_stack->chipset->set_baudrate_command 1593 && hci_stack->hci_transport->set_baudrate 1594 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1595 #endif 1596 1597 switch (hci_stack->substate){ 1598 case HCI_INIT_SEND_RESET: 1599 hci_state_reset(); 1600 1601 #ifndef HAVE_HOST_CONTROLLER_API 1602 // prepare reset if command complete not received in 100ms 1603 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1604 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1605 btstack_run_loop_add_timer(&hci_stack->timeout); 1606 #endif 1607 // send command 1608 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1609 hci_send_cmd(&hci_reset); 1610 break; 1611 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1612 hci_send_cmd(&hci_read_local_version_information); 1613 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1614 break; 1615 1616 #ifndef HAVE_HOST_CONTROLLER_API 1617 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1618 hci_state_reset(); 1619 // prepare reset if command complete not received in 100ms 1620 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1621 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1622 btstack_run_loop_add_timer(&hci_stack->timeout); 1623 // send command 1624 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1625 hci_send_cmd(&hci_reset); 1626 break; 1627 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1628 hci_state_reset(); 1629 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1630 hci_send_cmd(&hci_reset); 1631 break; 1632 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1633 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1634 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1635 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1636 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1637 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1638 break; 1639 } 1640 case HCI_INIT_SET_BD_ADDR: 1641 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1642 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1643 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1644 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1645 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1646 break; 1647 case HCI_INIT_SEND_READ_LOCAL_NAME: 1648 #ifdef ENABLE_CLASSIC 1649 hci_send_cmd(&hci_read_local_name); 1650 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1651 break; 1652 #endif 1653 /* fall through */ 1654 1655 case HCI_INIT_SEND_BAUD_CHANGE: 1656 if (need_baud_change) { 1657 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1658 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1659 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1660 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1661 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1662 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1663 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1664 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1665 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1666 btstack_run_loop_add_timer(&hci_stack->timeout); 1667 } 1668 break; 1669 } 1670 1671 /* fall through */ 1672 1673 case HCI_INIT_CUSTOM_INIT: 1674 // Custom initialization 1675 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1676 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1677 bool send_cmd = false; 1678 switch (hci_stack->chipset_result){ 1679 case BTSTACK_CHIPSET_VALID_COMMAND: 1680 send_cmd = true; 1681 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1682 break; 1683 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1684 send_cmd = true; 1685 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1686 log_info("CSR Warm Boot"); 1687 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1688 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1689 btstack_run_loop_add_timer(&hci_stack->timeout); 1690 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1691 && hci_stack->config 1692 && hci_stack->chipset 1693 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1694 && hci_stack->hci_transport->set_baudrate 1695 && hci_transport_uart_get_main_baud_rate()){ 1696 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1697 } else { 1698 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1699 } 1700 break; 1701 default: 1702 break; 1703 } 1704 1705 if (send_cmd){ 1706 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1707 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1708 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1709 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1710 break; 1711 } 1712 log_info("Init script done"); 1713 1714 // Init script download on Broadcom chipsets causes: 1715 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1716 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1717 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1718 1719 // - baud rate to reset, restore UART baud rate if needed 1720 if (need_baud_change) { 1721 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1722 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1723 hci_stack->hci_transport->set_baudrate(baud_rate); 1724 } 1725 1726 uint16_t bcm_delay_ms = 300; 1727 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1728 // -> Work around: wait here. 1729 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1730 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1731 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1732 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1733 btstack_run_loop_add_timer(&hci_stack->timeout); 1734 break; 1735 } 1736 } 1737 #endif 1738 /* fall through */ 1739 1740 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1741 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1742 hci_send_cmd(&hci_read_local_supported_commands); 1743 break; 1744 case HCI_INIT_READ_BD_ADDR: 1745 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1746 hci_send_cmd(&hci_read_bd_addr); 1747 break; 1748 case HCI_INIT_READ_BUFFER_SIZE: 1749 // only read buffer size if supported 1750 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1751 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1752 hci_send_cmd(&hci_read_buffer_size); 1753 break; 1754 } 1755 1756 /* fall through */ 1757 1758 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1759 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1760 hci_send_cmd(&hci_read_local_supported_features); 1761 break; 1762 1763 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1764 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1765 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1766 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1767 break; 1768 case HCI_INIT_HOST_BUFFER_SIZE: 1769 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1770 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1771 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1772 break; 1773 #endif 1774 1775 case HCI_INIT_SET_EVENT_MASK: 1776 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1777 if (hci_le_supported()){ 1778 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1779 } else { 1780 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1781 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1782 } 1783 break; 1784 1785 case HCI_INIT_SET_EVENT_MASK_2: 1786 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1787 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1788 // Encryption Change Event v2 - bit 25 1789 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1790 break; 1791 } 1792 1793 #ifdef ENABLE_CLASSIC 1794 /* fall through */ 1795 1796 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1797 if (hci_classic_supported() && gap_ssp_supported()){ 1798 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1799 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1800 break; 1801 } 1802 1803 /* fall through */ 1804 1805 case HCI_INIT_WRITE_INQUIRY_MODE: 1806 if (hci_classic_supported()){ 1807 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1808 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1809 break; 1810 } 1811 1812 /* fall through */ 1813 1814 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1815 // skip write secure connections host support if not supported or disabled 1816 if (hci_classic_supported() && hci_stack->secure_connections_enable 1817 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1818 hci_stack->secure_connections_active = true; 1819 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1820 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1821 break; 1822 } 1823 1824 /* fall through */ 1825 1826 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1827 // skip set min encryption key size 1828 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1829 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1830 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1831 break; 1832 } 1833 1834 #ifdef ENABLE_SCO_OVER_HCI 1835 /* fall through */ 1836 1837 // only sent if ENABLE_SCO_OVER_HCI is defined 1838 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1839 // skip write synchronous flow control if not supported 1840 if (hci_classic_supported() 1841 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1842 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1843 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1844 break; 1845 } 1846 /* fall through */ 1847 1848 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1849 // skip write default erroneous data reporting if not supported 1850 if (hci_classic_supported() 1851 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1852 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1853 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1854 break; 1855 } 1856 #endif 1857 1858 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1859 /* fall through */ 1860 1861 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1862 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1863 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1864 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1865 #ifdef ENABLE_SCO_OVER_HCI 1866 log_info("BCM: Route SCO data via HCI transport"); 1867 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1868 #endif 1869 #ifdef ENABLE_SCO_OVER_PCM 1870 log_info("BCM: Route SCO data via PCM interface"); 1871 #ifdef ENABLE_BCM_PCM_WBS 1872 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1873 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1874 #else 1875 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1876 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1877 #endif 1878 #endif 1879 break; 1880 } 1881 #endif 1882 1883 #ifdef ENABLE_SCO_OVER_PCM 1884 /* fall through */ 1885 1886 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1887 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1888 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1889 log_info("BCM: Config PCM interface for I2S"); 1890 #ifdef ENABLE_BCM_PCM_WBS 1891 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1892 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1893 #else 1894 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1895 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1896 #endif 1897 break; 1898 } 1899 #endif 1900 #endif 1901 1902 #ifdef ENABLE_BLE 1903 /* fall through */ 1904 1905 // LE INIT 1906 case HCI_INIT_LE_READ_BUFFER_SIZE: 1907 if (hci_le_supported()){ 1908 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1909 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 1910 hci_send_cmd(&hci_le_read_buffer_size_v2); 1911 } else { 1912 hci_send_cmd(&hci_le_read_buffer_size); 1913 } 1914 break; 1915 } 1916 1917 /* fall through */ 1918 1919 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1920 // skip write le host if not supported (e.g. on LE only EM9301) 1921 if (hci_le_supported() 1922 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1923 // LE Supported Host = 1, Simultaneous Host = 0 1924 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1925 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1926 break; 1927 } 1928 1929 /* fall through */ 1930 1931 case HCI_INIT_LE_SET_EVENT_MASK: 1932 if (hci_le_supported()){ 1933 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1934 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1935 break; 1936 } 1937 #endif 1938 1939 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1940 /* fall through */ 1941 1942 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1943 if (hci_le_supported() 1944 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1945 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1946 hci_send_cmd(&hci_le_read_maximum_data_length); 1947 break; 1948 } 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1953 if (hci_le_supported() 1954 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1955 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1956 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1957 break; 1958 } 1959 #endif 1960 1961 #ifdef ENABLE_LE_CENTRAL 1962 /* fall through */ 1963 1964 case HCI_INIT_READ_WHITE_LIST_SIZE: 1965 if (hci_le_supported()){ 1966 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1967 hci_send_cmd(&hci_le_read_white_list_size); 1968 break; 1969 } 1970 1971 #endif 1972 1973 #ifdef ENABLE_LE_PERIPHERAL 1974 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1975 /* fall through */ 1976 1977 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1978 if (hci_extended_advertising_supported()){ 1979 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1980 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1981 break; 1982 } 1983 #endif 1984 #endif 1985 /* fall through */ 1986 1987 case HCI_INIT_DONE: 1988 hci_stack->substate = HCI_INIT_DONE; 1989 // main init sequence complete 1990 #ifdef ENABLE_CLASSIC 1991 // check if initial Classic GAP Tasks are completed 1992 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1993 hci_run_gap_tasks_classic(); 1994 break; 1995 } 1996 #endif 1997 #ifdef ENABLE_BLE 1998 #ifdef ENABLE_LE_CENTRAL 1999 // check if initial LE GAP Tasks are completed 2000 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2001 hci_run_general_gap_le(); 2002 break; 2003 } 2004 #endif 2005 #endif 2006 hci_init_done(); 2007 break; 2008 2009 default: 2010 return; 2011 } 2012 } 2013 2014 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2015 bool command_completed = false; 2016 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2017 uint16_t opcode = little_endian_read_16(packet,3); 2018 if (opcode == hci_stack->last_cmd_opcode){ 2019 command_completed = true; 2020 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2021 } else { 2022 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2023 } 2024 } 2025 2026 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2027 uint8_t status = packet[2]; 2028 uint16_t opcode = little_endian_read_16(packet,4); 2029 if (opcode == hci_stack->last_cmd_opcode){ 2030 if (status){ 2031 command_completed = true; 2032 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2033 } else { 2034 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2035 } 2036 } else { 2037 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2038 } 2039 } 2040 #ifndef HAVE_HOST_CONTROLLER_API 2041 // Vendor == CSR 2042 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2043 // TODO: track actual command 2044 command_completed = true; 2045 } 2046 2047 // Vendor == Toshiba 2048 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2049 // TODO: track actual command 2050 command_completed = true; 2051 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2052 hci_stack->num_cmd_packets = 1; 2053 } 2054 #endif 2055 2056 return command_completed; 2057 } 2058 2059 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2060 2061 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2062 2063 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2064 2065 #ifndef HAVE_HOST_CONTROLLER_API 2066 2067 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2068 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2069 // 2070 // HCI Reset 2071 // Timeout 100 ms 2072 // HCI Reset 2073 // Command Complete Reset 2074 // HCI Read Local Version Information 2075 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2076 // hang... 2077 // 2078 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2079 if (!command_completed 2080 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2081 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2082 2083 uint16_t opcode = little_endian_read_16(packet,3); 2084 if (opcode == hci_reset.opcode){ 2085 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2086 return; 2087 } 2088 } 2089 2090 // CSR & H5 2091 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2092 if (!command_completed 2093 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2094 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2095 2096 uint16_t opcode = little_endian_read_16(packet,3); 2097 if (opcode == hci_reset.opcode){ 2098 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2099 return; 2100 } 2101 } 2102 2103 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2104 // fix: Correct substate and behave as command below 2105 if (command_completed){ 2106 switch (hci_stack->substate){ 2107 case HCI_INIT_SEND_RESET: 2108 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2109 break; 2110 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2111 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2112 break; 2113 default: 2114 break; 2115 } 2116 } 2117 2118 #endif 2119 2120 if (!command_completed) return; 2121 2122 bool need_baud_change = false; 2123 bool need_addr_change = false; 2124 2125 #ifndef HAVE_HOST_CONTROLLER_API 2126 need_baud_change = hci_stack->config 2127 && hci_stack->chipset 2128 && hci_stack->chipset->set_baudrate_command 2129 && hci_stack->hci_transport->set_baudrate 2130 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2131 2132 need_addr_change = hci_stack->custom_bd_addr_set 2133 && hci_stack->chipset 2134 && hci_stack->chipset->set_bd_addr_command; 2135 #endif 2136 2137 switch(hci_stack->substate){ 2138 2139 #ifndef HAVE_HOST_CONTROLLER_API 2140 case HCI_INIT_SEND_RESET: 2141 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2142 // fix: just correct substate and behave as command below 2143 2144 /* fall through */ 2145 #endif 2146 2147 case HCI_INIT_W4_SEND_RESET: 2148 btstack_run_loop_remove_timer(&hci_stack->timeout); 2149 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2150 return; 2151 2152 #ifndef HAVE_HOST_CONTROLLER_API 2153 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2154 // for STLC2500D, baud rate change already happened. 2155 // for others, baud rate gets changed now 2156 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2157 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2158 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2159 hci_stack->hci_transport->set_baudrate(baud_rate); 2160 } 2161 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2162 return; 2163 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2164 btstack_run_loop_remove_timer(&hci_stack->timeout); 2165 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2166 return; 2167 case HCI_INIT_W4_CUSTOM_INIT: 2168 // repeat custom init 2169 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2170 return; 2171 #endif 2172 2173 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2174 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2175 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2176 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2177 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2178 return; 2179 } 2180 if (need_addr_change){ 2181 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2182 return; 2183 } 2184 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2185 return; 2186 #ifndef HAVE_HOST_CONTROLLER_API 2187 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2188 if (need_baud_change){ 2189 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2190 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2191 hci_stack->hci_transport->set_baudrate(baud_rate); 2192 } 2193 if (need_addr_change){ 2194 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2195 return; 2196 } 2197 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2198 return; 2199 case HCI_INIT_W4_SET_BD_ADDR: 2200 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2201 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2202 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2203 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2204 return; 2205 } 2206 // skipping st warm boot 2207 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2208 return; 2209 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2210 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2211 return; 2212 #endif 2213 2214 case HCI_INIT_DONE: 2215 // set state if we came here by fall through 2216 hci_stack->substate = HCI_INIT_DONE; 2217 return; 2218 2219 default: 2220 break; 2221 } 2222 hci_initializing_next_state(); 2223 } 2224 2225 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2226 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2227 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2228 // check if we have been aware of the HCI connection 2229 switch (conn->state){ 2230 case SENT_CREATE_CONNECTION: 2231 case RECEIVED_CONNECTION_REQUEST: 2232 break; 2233 default: 2234 return; 2235 } 2236 2237 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2238 bd_addr_t bd_address; 2239 (void)memcpy(&bd_address, conn->address, 6); 2240 2241 #ifdef ENABLE_CLASSIC 2242 // cache needed data 2243 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2244 #endif 2245 2246 // connection failed, remove entry 2247 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2248 btstack_memory_hci_connection_free( conn ); 2249 2250 #ifdef ENABLE_CLASSIC 2251 // notify client if dedicated bonding 2252 if (notify_dedicated_bonding_failed){ 2253 log_info("hci notify_dedicated_bonding_failed"); 2254 hci_emit_dedicated_bonding_result(bd_address, status); 2255 } 2256 2257 // if authentication error, also delete link key 2258 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2259 gap_drop_link_key_for_bd_addr(bd_address); 2260 } 2261 #else 2262 UNUSED(status); 2263 #endif 2264 } 2265 2266 #ifdef ENABLE_CLASSIC 2267 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2268 // SSP Controller 2269 if (features[6] & (1 << 3)){ 2270 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2271 } 2272 // eSCO 2273 if (features[3] & (1<<7)){ 2274 conn->remote_supported_features[0] |= 1; 2275 } 2276 // Extended features 2277 if (features[7] & (1<<7)){ 2278 conn->remote_supported_features[0] |= 2; 2279 } 2280 } 2281 2282 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2283 // SSP Host 2284 if (features[0] & (1 << 0)){ 2285 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2286 } 2287 // SC Host 2288 if (features[0] & (1 << 3)){ 2289 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2290 } 2291 } 2292 2293 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2294 // SC Controller 2295 if (features[1] & (1 << 0)){ 2296 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2297 } 2298 } 2299 2300 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2301 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2302 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2303 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2304 if (conn->bonding_flags & BONDING_DEDICATED){ 2305 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2306 } 2307 } 2308 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2309 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2310 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2311 } 2312 2313 #endif 2314 2315 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2316 // handle BT initialization 2317 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2318 hci_initializing_event_handler(packet, size); 2319 } 2320 2321 // help with BT sleep 2322 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2323 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2324 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2325 hci_initializing_next_state(); 2326 } 2327 } 2328 2329 #ifdef ENABLE_CLASSIC 2330 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2331 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2332 conn->encryption_key_size = encryption_key_size; 2333 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2334 2335 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2336 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2337 conn->bonding_flags &= ~BONDING_DEDICATED; 2338 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2339 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2340 return; 2341 } 2342 2343 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2344 conn->requested_security_level = LEVEL_0; 2345 hci_emit_security_level(conn->con_handle, security_level); 2346 return; 2347 } 2348 2349 // Request remote features if not already done 2350 hci_trigger_remote_features_for_connection(conn); 2351 2352 // Request Authentication if not already done 2353 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2354 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2355 } 2356 #endif 2357 2358 static void hci_store_local_supported_commands(const uint8_t * packet){ 2359 // create mapping table 2360 #define X(name, offset, bit) { offset, bit }, 2361 static struct { 2362 uint8_t byte_offset; 2363 uint8_t bit_position; 2364 } supported_hci_commands_map [] = { 2365 SUPPORTED_HCI_COMMANDS 2366 }; 2367 #undef X 2368 2369 // create names for debug purposes 2370 #ifdef ENABLE_LOG_DEBUG 2371 #define X(name, offset, bit) #name, 2372 static const char * command_names[] = { 2373 SUPPORTED_HCI_COMMANDS 2374 }; 2375 #undef X 2376 #endif 2377 2378 hci_stack->local_supported_commands = 0; 2379 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2380 uint16_t i; 2381 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2382 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2383 #ifdef ENABLE_LOG_DEBUG 2384 log_info("Command %s (%u) supported %u/%u", command_names[i], i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2385 #else 2386 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2387 #endif 2388 hci_stack->local_supported_commands |= (1LU << i); 2389 } 2390 } 2391 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2392 } 2393 2394 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2395 UNUSED(size); 2396 2397 uint16_t manufacturer; 2398 #ifdef ENABLE_CLASSIC 2399 hci_con_handle_t handle; 2400 hci_connection_t * conn; 2401 uint8_t status; 2402 #endif 2403 // get num cmd packets - limit to 1 to reduce complexity 2404 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2405 2406 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2407 switch (opcode){ 2408 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2409 if (packet[5]) break; 2410 // terminate, name 248 chars 2411 packet[6+248] = 0; 2412 log_info("local name: %s", &packet[6]); 2413 break; 2414 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2415 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2416 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2417 uint16_t acl_len = little_endian_read_16(packet, 6); 2418 uint16_t sco_len = packet[8]; 2419 2420 // determine usable ACL/SCO payload size 2421 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2422 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2423 2424 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2425 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2426 2427 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2428 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2429 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2430 } 2431 break; 2432 case HCI_OPCODE_HCI_READ_RSSI: 2433 if (packet[5] == ERROR_CODE_SUCCESS){ 2434 uint8_t event[5]; 2435 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2436 event[1] = 3; 2437 (void)memcpy(&event[2], &packet[6], 3); 2438 hci_emit_event(event, sizeof(event), 1); 2439 } 2440 break; 2441 #ifdef ENABLE_BLE 2442 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2443 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2444 hci_stack->le_iso_packets_total_num = packet[11]; 2445 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2446 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2447 2448 /* fall through */ 2449 2450 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2451 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2452 hci_stack->le_acl_packets_total_num = packet[8]; 2453 // determine usable ACL payload size 2454 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2455 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2456 } 2457 log_info("hci_le_read_buffer_size: acl size %u, acl count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2458 break; 2459 #endif 2460 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2461 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2462 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2463 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2464 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); 2465 break; 2466 #endif 2467 #ifdef ENABLE_LE_CENTRAL 2468 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2469 hci_stack->le_whitelist_capacity = packet[6]; 2470 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2471 break; 2472 #endif 2473 #ifdef ENABLE_LE_PERIPHERAL 2474 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2475 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2476 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2477 break; 2478 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2479 if (hci_stack->le_advertising_set_in_current_command != 0) { 2480 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2481 hci_stack->le_advertising_set_in_current_command = 0; 2482 if (advertising_set == NULL) break; 2483 uint8_t adv_status = packet[6]; 2484 uint8_t tx_power = packet[7]; 2485 uint8_t event[] = { HCI_EVENT_META_GAP, 4, GAP_SUBEVENT_ADVERTISING_SET_INSTALLED, hci_stack->le_advertising_set_in_current_command, adv_status, tx_power }; 2486 if (adv_status == 0){ 2487 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2488 } 2489 hci_emit_event(event, sizeof(event), 1); 2490 } 2491 break; 2492 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2493 if (hci_stack->le_advertising_set_in_current_command != 0) { 2494 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2495 hci_stack->le_advertising_set_in_current_command = 0; 2496 if (advertising_set == NULL) break; 2497 uint8_t adv_status = packet[5]; 2498 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2499 if (adv_status == 0){ 2500 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2501 } 2502 hci_emit_event(event, sizeof(event), 1); 2503 } 2504 break; 2505 #endif 2506 #endif 2507 case HCI_OPCODE_HCI_READ_BD_ADDR: 2508 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2509 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)); 2510 #ifdef ENABLE_CLASSIC 2511 if (hci_stack->link_key_db){ 2512 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2513 } 2514 #endif 2515 break; 2516 #ifdef ENABLE_CLASSIC 2517 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2518 hci_emit_discoverable_enabled(hci_stack->discoverable); 2519 break; 2520 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2521 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2522 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2523 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2524 hci_emit_event(event, sizeof(event), 1); 2525 } 2526 break; 2527 #endif 2528 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2529 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2530 2531 #ifdef ENABLE_CLASSIC 2532 // determine usable ACL packet types based on host buffer size and supported features 2533 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2534 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2535 #endif 2536 // Classic/LE 2537 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2538 break; 2539 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2540 manufacturer = little_endian_read_16(packet, 10); 2541 // map Cypress to Broadcom 2542 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2543 log_info("Treat Cypress as Broadcom"); 2544 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2545 little_endian_store_16(packet, 10, manufacturer); 2546 } 2547 hci_stack->manufacturer = manufacturer; 2548 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2549 break; 2550 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2551 hci_store_local_supported_commands(packet); 2552 break; 2553 #ifdef ENABLE_CLASSIC 2554 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2555 if (packet[5]) return; 2556 hci_stack->synchronous_flow_control_enabled = 1; 2557 break; 2558 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2559 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2560 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2561 conn = hci_connection_for_handle(handle); 2562 if (conn != NULL) { 2563 uint8_t key_size = 0; 2564 if (status == 0){ 2565 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2566 log_info("Handle %04x key Size: %u", handle, key_size); 2567 } else { 2568 key_size = 1; 2569 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2570 } 2571 hci_handle_read_encryption_key_size_complete(conn, key_size); 2572 } 2573 break; 2574 // assert pairing complete event is emitted. 2575 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2576 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2577 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2578 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2579 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2580 // lookup connection by gap pairing addr 2581 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2582 if (conn == NULL) break; 2583 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2584 break; 2585 2586 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2587 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2588 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2589 uint8_t event[67]; 2590 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2591 event[1] = 65; 2592 (void)memset(&event[2], 0, 65); 2593 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2594 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2595 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2596 event[2] = 3; 2597 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2598 } else { 2599 event[2] = 1; 2600 } 2601 } 2602 hci_emit_event(event, sizeof(event), 0); 2603 break; 2604 } 2605 2606 // note: only needed if user does not provide OOB data 2607 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2608 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2609 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2610 if (conn == NULL) break; 2611 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2612 break; 2613 #endif 2614 #endif 2615 default: 2616 break; 2617 } 2618 } 2619 2620 #ifdef ENABLE_BLE 2621 static void event_handle_le_connection_complete(const uint8_t * packet){ 2622 bd_addr_t addr; 2623 bd_addr_type_t addr_type; 2624 hci_connection_t * conn; 2625 2626 // Connection management 2627 reverse_bd_addr(&packet[8], addr); 2628 addr_type = (bd_addr_type_t)packet[7]; 2629 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2630 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2631 2632 #ifdef ENABLE_LE_CENTRAL 2633 // handle error: error is reported only to the initiator -> outgoing connection 2634 if (packet[3]){ 2635 2636 // handle cancelled outgoing connection 2637 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2638 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2639 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2640 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2641 // reset state 2642 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2643 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2644 // get outgoing connection conn struct for direct connect 2645 conn = gap_get_outgoing_connection(); 2646 } 2647 2648 // outgoing le connection establishment is done 2649 if (conn){ 2650 // remove entry 2651 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2652 btstack_memory_hci_connection_free( conn ); 2653 } 2654 return; 2655 } 2656 #endif 2657 2658 // on success, both hosts receive connection complete event 2659 if (packet[6] == HCI_ROLE_MASTER){ 2660 #ifdef ENABLE_LE_CENTRAL 2661 // if we're master on an le connection, it was an outgoing connection and we're done with it 2662 // note: no hci_connection_t object exists yet for connect with whitelist 2663 if (hci_is_le_connection_type(addr_type)){ 2664 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2665 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2666 } 2667 #endif 2668 } else { 2669 #ifdef ENABLE_LE_PERIPHERAL 2670 // if we're slave, it was an incoming connection, advertisements have stopped 2671 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2672 #endif 2673 } 2674 2675 // LE connections are auto-accepted, so just create a connection if there isn't one already 2676 if (!conn){ 2677 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2678 } 2679 2680 // no memory, sorry. 2681 if (!conn){ 2682 return; 2683 } 2684 2685 conn->state = OPEN; 2686 conn->role = packet[6]; 2687 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2688 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2689 2690 #ifdef ENABLE_LE_PERIPHERAL 2691 if (packet[6] == HCI_ROLE_SLAVE){ 2692 hci_update_advertisements_enabled_for_current_roles(); 2693 } 2694 #endif 2695 2696 // init unenhanced att bearer mtu 2697 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2698 conn->att_connection.mtu_exchanged = false; 2699 2700 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2701 2702 // restart timer 2703 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2704 // btstack_run_loop_add_timer(&conn->timeout); 2705 2706 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2707 2708 hci_emit_nr_connections_changed(); 2709 } 2710 #endif 2711 2712 #ifdef ENABLE_CLASSIC 2713 static bool hci_ssp_security_level_possible_for_io_cap(gap_security_level_t level, uint8_t io_cap_local, uint8_t io_cap_remote){ 2714 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2715 // LEVEL_4 is tested by l2cap 2716 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2717 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2718 if (level >= LEVEL_3){ 2719 // MITM not possible without keyboard or display 2720 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2721 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2722 2723 // MITM possible if one side has keyboard and the other has keyboard or display 2724 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2725 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2726 2727 // MITM not possible if one side has only display and other side has no keyboard 2728 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2729 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2730 } 2731 // LEVEL 2 requires SSP, which is a given 2732 return true; 2733 } 2734 2735 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2736 uint16_t i; 2737 for (i=0; i < size ; i++){ 2738 if (data[i] != 0) { 2739 return false; 2740 } 2741 } 2742 return true; 2743 } 2744 2745 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2746 // get requested security level 2747 gap_security_level_t requested_security_level = conn->requested_security_level; 2748 if (hci_stack->gap_secure_connections_only_mode){ 2749 requested_security_level = LEVEL_4; 2750 } 2751 2752 // assess security: LEVEL 4 requires SC 2753 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2754 if ((requested_security_level == LEVEL_4) && 2755 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2756 !hci_remote_sc_enabled(conn)){ 2757 log_info("Level 4 required, but SC not supported -> abort"); 2758 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2759 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2760 return; 2761 } 2762 2763 // assess security based on io capabilities 2764 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2765 // responder: fully validate io caps of both sides as well as OOB data 2766 bool security_possible = false; 2767 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2768 2769 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2770 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2771 // so we merge the OOB data availability 2772 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2773 if (conn->classic_oob_c_192 != NULL){ 2774 have_oob_data |= 1; 2775 } 2776 if (conn->classic_oob_c_256 != NULL){ 2777 have_oob_data |= 2; 2778 } 2779 // for up to Level 3, either P-192 as well as P-256 will do 2780 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 2781 // if remote does not SC, we should not receive P-256 data either 2782 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2783 security_possible = true; 2784 } 2785 // for Level 4, P-256 is needed 2786 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2787 security_possible = true; 2788 } 2789 #endif 2790 2791 if (security_possible == false){ 2792 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2793 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2794 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2795 return; 2796 } 2797 } else { 2798 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2799 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2800 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2801 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2802 log_info("Level 3+ required, but no input/output -> abort"); 2803 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2804 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2805 return; 2806 } 2807 #endif 2808 #endif 2809 } 2810 2811 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2812 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2813 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2814 } else { 2815 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2816 } 2817 #endif 2818 } 2819 2820 #endif 2821 2822 static void event_handler(uint8_t *packet, uint16_t size){ 2823 2824 uint16_t event_length = packet[1]; 2825 2826 // assert packet is complete 2827 if (size != (event_length + 2u)){ 2828 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2829 return; 2830 } 2831 2832 bd_addr_type_t addr_type; 2833 hci_con_handle_t handle; 2834 hci_connection_t * conn; 2835 int i; 2836 int create_connection_cmd; 2837 2838 #ifdef ENABLE_CLASSIC 2839 hci_link_type_t link_type; 2840 bd_addr_t addr; 2841 #endif 2842 2843 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2844 2845 switch (hci_event_packet_get_type(packet)) { 2846 2847 case HCI_EVENT_COMMAND_COMPLETE: 2848 handle_command_complete_event(packet, size); 2849 break; 2850 2851 case HCI_EVENT_COMMAND_STATUS: 2852 // get num cmd packets - limit to 1 to reduce complexity 2853 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2854 2855 // check command status to detected failed outgoing connections 2856 create_connection_cmd = 0; 2857 #ifdef ENABLE_CLASSIC 2858 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2859 create_connection_cmd = 1; 2860 } 2861 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2862 create_connection_cmd = 1; 2863 } 2864 #endif 2865 #ifdef ENABLE_LE_CENTRAL 2866 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2867 create_connection_cmd = 1; 2868 } 2869 #endif 2870 if (create_connection_cmd) { 2871 uint8_t status = hci_event_command_status_get_status(packet); 2872 addr_type = hci_stack->outgoing_addr_type; 2873 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2874 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); 2875 2876 // reset outgoing address info 2877 memset(hci_stack->outgoing_addr, 0, 6); 2878 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2879 2880 // on error 2881 if (status != ERROR_CODE_SUCCESS){ 2882 #ifdef ENABLE_LE_CENTRAL 2883 if (hci_is_le_connection_type(addr_type)){ 2884 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2885 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2886 } 2887 #endif 2888 // error => outgoing connection failed 2889 if (conn != NULL){ 2890 hci_handle_connection_failed(conn, status); 2891 } 2892 } 2893 } 2894 2895 #ifdef ENABLE_CLASSIC 2896 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2897 uint8_t status = hci_event_command_status_get_status(packet); 2898 log_info("command status (inquiry), status %x", status); 2899 if (status == ERROR_CODE_SUCCESS) { 2900 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2901 } else { 2902 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2903 } 2904 } 2905 #endif 2906 break; 2907 2908 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2909 if (size < 3) return; 2910 uint16_t num_handles = packet[2]; 2911 if (size != (3u + num_handles * 4u)) return; 2912 uint16_t offset = 3; 2913 for (i=0; i<num_handles;i++){ 2914 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2915 offset += 2u; 2916 uint16_t num_packets = little_endian_read_16(packet, offset); 2917 offset += 2u; 2918 2919 conn = hci_connection_for_handle(handle); 2920 if (!conn){ 2921 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2922 continue; 2923 } 2924 2925 if (conn->num_packets_sent >= num_packets){ 2926 conn->num_packets_sent -= num_packets; 2927 } else { 2928 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2929 conn->num_packets_sent = 0; 2930 } 2931 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2932 2933 #ifdef ENABLE_CLASSIC 2934 // For SCO, we do the can_send_now_check here 2935 hci_notify_if_sco_can_send_now(); 2936 #endif 2937 } 2938 break; 2939 } 2940 2941 #ifdef ENABLE_CLASSIC 2942 case HCI_EVENT_FLUSH_OCCURRED: 2943 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2944 handle = hci_event_flush_occurred_get_handle(packet); 2945 conn = hci_connection_for_handle(handle); 2946 if (conn) { 2947 log_info("Flush occurred, disconnect 0x%04x", handle); 2948 conn->state = SEND_DISCONNECT; 2949 } 2950 break; 2951 2952 case HCI_EVENT_INQUIRY_COMPLETE: 2953 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2954 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2955 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2956 hci_emit_event(event, sizeof(event), 1); 2957 } 2958 break; 2959 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2960 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2961 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2962 } 2963 break; 2964 case HCI_EVENT_CONNECTION_REQUEST: 2965 reverse_bd_addr(&packet[2], addr); 2966 link_type = (hci_link_type_t) packet[11]; 2967 2968 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2969 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2970 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2971 bd_addr_copy(hci_stack->decline_addr, addr); 2972 break; 2973 } 2974 2975 if (hci_stack->gap_classic_accept_callback != NULL){ 2976 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2977 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2978 bd_addr_copy(hci_stack->decline_addr, addr); 2979 break; 2980 } 2981 } 2982 2983 // TODO: eval COD 8-10 2984 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2985 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2986 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2987 if (!conn) { 2988 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2989 } 2990 if (!conn) { 2991 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2992 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2993 bd_addr_copy(hci_stack->decline_addr, addr); 2994 hci_run(); 2995 // avoid event to higher layer 2996 return; 2997 } 2998 conn->role = HCI_ROLE_SLAVE; 2999 conn->state = RECEIVED_CONNECTION_REQUEST; 3000 // store info about eSCO 3001 if (link_type == HCI_LINK_TYPE_ESCO){ 3002 conn->remote_supported_features[0] |= 1; 3003 } 3004 hci_run(); 3005 break; 3006 3007 case HCI_EVENT_CONNECTION_COMPLETE: 3008 // Connection management 3009 reverse_bd_addr(&packet[5], addr); 3010 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3011 addr_type = BD_ADDR_TYPE_ACL; 3012 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3013 if (conn) { 3014 if (!packet[2]){ 3015 conn->state = OPEN; 3016 conn->con_handle = little_endian_read_16(packet, 3); 3017 3018 // trigger write supervision timeout if we're master 3019 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3020 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3021 } 3022 3023 // trigger write automatic flush timeout 3024 if (hci_stack->automatic_flush_timeout != 0){ 3025 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3026 } 3027 3028 // restart timer 3029 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3030 btstack_run_loop_add_timer(&conn->timeout); 3031 3032 // trigger remote features for dedicated bonding 3033 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3034 hci_trigger_remote_features_for_connection(conn); 3035 } 3036 3037 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3038 3039 hci_emit_nr_connections_changed(); 3040 } else { 3041 // connection failed 3042 hci_handle_connection_failed(conn, packet[2]); 3043 } 3044 } 3045 break; 3046 3047 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3048 reverse_bd_addr(&packet[5], addr); 3049 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3050 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3051 if (packet[2]){ 3052 // connection failed 3053 if (conn){ 3054 hci_handle_connection_failed(conn, packet[2]); 3055 } 3056 break; 3057 } 3058 if (!conn) { 3059 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3060 } 3061 if (!conn) { 3062 break; 3063 } 3064 conn->state = OPEN; 3065 conn->con_handle = little_endian_read_16(packet, 3); 3066 3067 #ifdef ENABLE_SCO_OVER_HCI 3068 // update SCO 3069 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3070 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3071 } 3072 // trigger can send now 3073 if (hci_have_usb_transport()){ 3074 hci_stack->sco_can_send_now = true; 3075 } 3076 #endif 3077 #ifdef HAVE_SCO_TRANSPORT 3078 // configure sco transport 3079 if (hci_stack->sco_transport != NULL){ 3080 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3081 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3082 } 3083 #endif 3084 break; 3085 3086 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3087 handle = little_endian_read_16(packet, 3); 3088 conn = hci_connection_for_handle(handle); 3089 if (!conn) break; 3090 if (!packet[2]){ 3091 const uint8_t * features = &packet[5]; 3092 hci_handle_remote_features_page_0(conn, features); 3093 3094 // read extended features if possible 3095 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3096 && ((conn->remote_supported_features[0] & 2) != 0)) { 3097 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3098 break; 3099 } 3100 } 3101 hci_handle_remote_features_received(conn); 3102 break; 3103 3104 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3105 handle = little_endian_read_16(packet, 3); 3106 conn = hci_connection_for_handle(handle); 3107 if (!conn) break; 3108 // status = ok, page = 1 3109 if (!packet[2]) { 3110 uint8_t page_number = packet[5]; 3111 uint8_t maximum_page_number = packet[6]; 3112 const uint8_t * features = &packet[7]; 3113 bool done = false; 3114 switch (page_number){ 3115 case 1: 3116 hci_handle_remote_features_page_1(conn, features); 3117 if (maximum_page_number >= 2){ 3118 // get Secure Connections (Controller) from Page 2 if available 3119 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3120 } else { 3121 // otherwise, assume SC (Controller) == SC (Host) 3122 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3123 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3124 } 3125 done = true; 3126 } 3127 break; 3128 case 2: 3129 hci_handle_remote_features_page_2(conn, features); 3130 done = true; 3131 break; 3132 default: 3133 break; 3134 } 3135 if (!done) break; 3136 } 3137 hci_handle_remote_features_received(conn); 3138 break; 3139 3140 case HCI_EVENT_LINK_KEY_REQUEST: 3141 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3142 hci_event_link_key_request_get_bd_addr(packet, addr); 3143 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3144 if (!conn) break; 3145 3146 // lookup link key in db if not cached 3147 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3148 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3149 } 3150 3151 // response sent by hci_run() 3152 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3153 #endif 3154 break; 3155 3156 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3157 hci_event_link_key_request_get_bd_addr(packet, addr); 3158 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3159 if (!conn) break; 3160 3161 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3162 3163 // CVE-2020-26555: ignore NULL link key 3164 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3165 if (btstack_is_null(&packet[8], 16)) break; 3166 3167 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3168 // Change Connection Encryption keeps link key type 3169 if (link_key_type != CHANGED_COMBINATION_KEY){ 3170 conn->link_key_type = link_key_type; 3171 } 3172 3173 // cache link key. link keys stored in little-endian format for legacy reasons 3174 memcpy(&conn->link_key, &packet[8], 16); 3175 3176 // only store link key: 3177 // - if bondable enabled 3178 if (hci_stack->bondable == false) break; 3179 // - if security level sufficient 3180 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3181 // - for SSP, also check if remote side requested bonding as well 3182 if (conn->link_key_type != COMBINATION_KEY){ 3183 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3184 if (!remote_bonding){ 3185 break; 3186 } 3187 } 3188 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3189 break; 3190 } 3191 3192 case HCI_EVENT_PIN_CODE_REQUEST: 3193 hci_event_pin_code_request_get_bd_addr(packet, addr); 3194 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3195 if (!conn) break; 3196 3197 hci_pairing_started(conn, false); 3198 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3199 if (!hci_stack->bondable ){ 3200 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3201 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3202 hci_run(); 3203 return; 3204 } 3205 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3206 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3207 log_info("Level 4 required, but SC not supported -> abort"); 3208 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3209 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3210 hci_run(); 3211 return; 3212 } 3213 break; 3214 3215 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3216 hci_event_io_capability_response_get_bd_addr(packet, addr); 3217 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3218 if (!conn) break; 3219 3220 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3221 hci_pairing_started(conn, true); 3222 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3223 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3224 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3225 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3226 #endif 3227 break; 3228 3229 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3230 hci_event_io_capability_response_get_bd_addr(packet, addr); 3231 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3232 if (!conn) break; 3233 3234 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3235 hci_connection_timestamp(conn); 3236 hci_pairing_started(conn, true); 3237 break; 3238 3239 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3240 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3241 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3242 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3243 if (!conn) break; 3244 3245 hci_connection_timestamp(conn); 3246 3247 hci_pairing_started(conn, true); 3248 3249 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3250 break; 3251 #endif 3252 3253 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3254 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3255 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3256 if (!conn) break; 3257 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3258 if (hci_stack->ssp_auto_accept){ 3259 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3260 }; 3261 } else { 3262 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3263 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3264 // don't forward event to app 3265 hci_run(); 3266 return; 3267 } 3268 break; 3269 3270 case HCI_EVENT_USER_PASSKEY_REQUEST: 3271 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3272 if (hci_stack->ssp_auto_accept){ 3273 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3274 }; 3275 break; 3276 3277 case HCI_EVENT_MODE_CHANGE: 3278 handle = hci_event_mode_change_get_handle(packet); 3279 conn = hci_connection_for_handle(handle); 3280 if (!conn) break; 3281 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3282 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3283 break; 3284 #endif 3285 3286 case HCI_EVENT_ENCRYPTION_CHANGE: 3287 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3288 handle = hci_event_encryption_change_get_connection_handle(packet); 3289 conn = hci_connection_for_handle(handle); 3290 if (!conn) break; 3291 if (hci_event_encryption_change_get_status(packet) == 0u) { 3292 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3293 if (encryption_enabled){ 3294 if (hci_is_le_connection(conn)){ 3295 // For LE, we accept connection as encrypted 3296 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3297 } 3298 #ifdef ENABLE_CLASSIC 3299 else { 3300 3301 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3302 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3303 bool connected_uses_aes_ccm = encryption_enabled == 2; 3304 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3305 log_info("SC during pairing, but only E0 now -> abort"); 3306 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3307 break; 3308 } 3309 3310 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3311 if (connected_uses_aes_ccm){ 3312 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3313 } 3314 3315 #ifdef ENABLE_TESTING_SUPPORT 3316 // work around for issue with PTS dongle 3317 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3318 #endif 3319 // validate encryption key size 3320 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3321 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3322 // already got encryption key size 3323 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3324 } else { 3325 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3326 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3327 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3328 } else { 3329 // if not, pretend everything is perfect 3330 hci_handle_read_encryption_key_size_complete(conn, 16); 3331 } 3332 } 3333 } 3334 #endif 3335 } else { 3336 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3337 } 3338 } else { 3339 uint8_t status = hci_event_encryption_change_get_status(packet); 3340 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3341 conn->bonding_flags &= ~BONDING_DEDICATED; 3342 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3343 conn->bonding_status = status; 3344 } 3345 } 3346 3347 break; 3348 3349 #ifdef ENABLE_CLASSIC 3350 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3351 handle = hci_event_authentication_complete_get_connection_handle(packet); 3352 conn = hci_connection_for_handle(handle); 3353 if (!conn) break; 3354 3355 // clear authentication active flag 3356 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3357 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3358 3359 // authenticated only if auth status == 0 3360 if (hci_event_authentication_complete_get_status(packet) == 0){ 3361 // authenticated 3362 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3363 3364 // If not already encrypted, start encryption 3365 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3366 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3367 break; 3368 } 3369 } 3370 3371 // emit updated security level 3372 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3373 break; 3374 3375 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3376 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3377 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3378 if (!conn) break; 3379 3380 // treat successfully paired connection as authenticated 3381 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3382 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3383 } 3384 3385 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3386 break; 3387 #endif 3388 3389 // HCI_EVENT_DISCONNECTION_COMPLETE 3390 // has been split, to first notify stack before shutting connection down 3391 // see end of function, too. 3392 case HCI_EVENT_DISCONNECTION_COMPLETE: 3393 if (packet[2]) break; // status != 0 3394 handle = little_endian_read_16(packet, 3); 3395 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3396 if (hci_stack->acl_fragmentation_total_size > 0u) { 3397 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3398 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3399 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3400 hci_stack->acl_fragmentation_total_size = 0; 3401 hci_stack->acl_fragmentation_pos = 0; 3402 if (release_buffer){ 3403 hci_release_packet_buffer(); 3404 } 3405 } 3406 } 3407 3408 conn = hci_connection_for_handle(handle); 3409 if (!conn) break; 3410 #ifdef ENABLE_CLASSIC 3411 // pairing failed if it was ongoing 3412 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3413 #endif 3414 3415 // emit dedicatd bonding event 3416 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3417 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3418 } 3419 3420 // mark connection for shutdown, stop timers, reset state 3421 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3422 hci_connection_stop_timer(conn); 3423 hci_connection_init(conn); 3424 3425 #ifdef ENABLE_BLE 3426 #ifdef ENABLE_LE_PERIPHERAL 3427 // re-enable advertisements for le connections if active 3428 if (hci_is_le_connection(conn)){ 3429 hci_update_advertisements_enabled_for_current_roles(); 3430 } 3431 #endif 3432 #endif 3433 break; 3434 3435 case HCI_EVENT_HARDWARE_ERROR: 3436 log_error("Hardware Error: 0x%02x", packet[2]); 3437 if (hci_stack->hardware_error_callback){ 3438 (*hci_stack->hardware_error_callback)(packet[2]); 3439 } else { 3440 // if no special requests, just reboot stack 3441 hci_power_control_off(); 3442 hci_power_control_on(); 3443 } 3444 break; 3445 3446 #ifdef ENABLE_CLASSIC 3447 case HCI_EVENT_ROLE_CHANGE: 3448 if (packet[2]) break; // status != 0 3449 reverse_bd_addr(&packet[3], addr); 3450 addr_type = BD_ADDR_TYPE_ACL; 3451 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3452 if (!conn) break; 3453 conn->role = packet[9]; 3454 break; 3455 #endif 3456 3457 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3458 // release packet buffer only for asynchronous transport and if there are not further fragements 3459 if (hci_transport_synchronous()) { 3460 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3461 return; // instead of break: to avoid re-entering hci_run() 3462 } 3463 hci_stack->acl_fragmentation_tx_active = 0; 3464 if (hci_stack->acl_fragmentation_total_size) break; 3465 hci_release_packet_buffer(); 3466 3467 // L2CAP receives this event via the hci_emit_event below 3468 3469 #ifdef ENABLE_CLASSIC 3470 // For SCO, we do the can_send_now_check here 3471 hci_notify_if_sco_can_send_now(); 3472 #endif 3473 break; 3474 3475 #ifdef ENABLE_CLASSIC 3476 case HCI_EVENT_SCO_CAN_SEND_NOW: 3477 // For SCO, we do the can_send_now_check here 3478 hci_stack->sco_can_send_now = true; 3479 hci_notify_if_sco_can_send_now(); 3480 return; 3481 3482 // explode inquriy results for easier consumption 3483 case HCI_EVENT_INQUIRY_RESULT: 3484 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3485 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3486 gap_inquiry_explode(packet, size); 3487 break; 3488 #endif 3489 3490 #ifdef ENABLE_BLE 3491 case HCI_EVENT_LE_META: 3492 switch (packet[2]){ 3493 #ifdef ENABLE_LE_CENTRAL 3494 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3495 if (!hci_stack->le_scanning_enabled) break; 3496 le_handle_advertisement_report(packet, size); 3497 break; 3498 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3499 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3500 if (!hci_stack->le_scanning_enabled) break; 3501 le_handle_extended_advertisement_report(packet, size); 3502 break; 3503 #endif 3504 #endif 3505 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3506 event_handle_le_connection_complete(packet); 3507 break; 3508 3509 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3510 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3511 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3512 conn = hci_connection_for_handle(handle); 3513 if (!conn) break; 3514 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3515 break; 3516 3517 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3518 // connection 3519 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3520 conn = hci_connection_for_handle(handle); 3521 if (conn) { 3522 // read arguments 3523 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3524 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3525 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3526 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3527 3528 // validate against current connection parameter range 3529 le_connection_parameter_range_t existing_range; 3530 gap_get_connection_parameter_range(&existing_range); 3531 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3532 if (update_parameter){ 3533 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3534 conn->le_conn_interval_min = le_conn_interval_min; 3535 conn->le_conn_interval_max = le_conn_interval_max; 3536 conn->le_conn_latency = le_conn_latency; 3537 conn->le_supervision_timeout = le_supervision_timeout; 3538 } else { 3539 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3540 } 3541 } 3542 break; 3543 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3544 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3545 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3546 conn = hci_connection_for_handle(handle); 3547 if (conn) { 3548 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3549 } 3550 break; 3551 #endif 3552 default: 3553 break; 3554 } 3555 break; 3556 #endif 3557 case HCI_EVENT_VENDOR_SPECIFIC: 3558 // Vendor specific commands often create vendor specific event instead of num completed packets 3559 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3560 switch (hci_stack->manufacturer){ 3561 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3562 hci_stack->num_cmd_packets = 1; 3563 break; 3564 default: 3565 break; 3566 } 3567 break; 3568 default: 3569 break; 3570 } 3571 3572 handle_event_for_current_stack_state(packet, size); 3573 3574 // notify upper stack 3575 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3576 3577 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3578 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3579 handle = little_endian_read_16(packet, 3); 3580 hci_connection_t * aConn = hci_connection_for_handle(handle); 3581 // discard connection if app did not trigger a reconnect in the event handler 3582 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3583 hci_shutdown_connection(aConn); 3584 } 3585 } 3586 3587 // execute main loop 3588 hci_run(); 3589 } 3590 3591 #ifdef ENABLE_CLASSIC 3592 3593 #ifdef ENABLE_SCO_OVER_HCI 3594 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3595 static void sco_schedule_tx(hci_connection_t * conn); 3596 3597 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3598 log_debug("SCO TX Timeout"); 3599 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3600 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3601 if (!conn) return; 3602 3603 // trigger send 3604 conn->sco_tx_ready = 1; 3605 // extra packet if CVSD but SCO buffer is too short 3606 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3607 conn->sco_tx_ready++; 3608 } 3609 hci_notify_if_sco_can_send_now(); 3610 } 3611 3612 3613 #define SCO_TX_AFTER_RX_MS (6) 3614 3615 static void sco_schedule_tx(hci_connection_t * conn){ 3616 3617 uint32_t now = btstack_run_loop_get_time_ms(); 3618 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3619 int time_delta_ms = sco_tx_ms - now; 3620 3621 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3622 3623 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3624 btstack_run_loop_remove_timer(timer); 3625 btstack_run_loop_set_timer(timer, time_delta_ms); 3626 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3627 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3628 btstack_run_loop_add_timer(timer); 3629 } 3630 #endif 3631 3632 static void sco_handler(uint8_t * packet, uint16_t size){ 3633 // lookup connection struct 3634 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3635 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3636 if (!conn) return; 3637 3638 #ifdef ENABLE_SCO_OVER_HCI 3639 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3640 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3641 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3642 packet[2] = 0x3c; 3643 memmove(&packet[3], &packet[23], 63); 3644 size = 63; 3645 } 3646 } 3647 3648 if (hci_have_usb_transport()){ 3649 // Nothing to do 3650 } else { 3651 // 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); 3652 if (hci_stack->synchronous_flow_control_enabled == 0){ 3653 uint32_t now = btstack_run_loop_get_time_ms(); 3654 3655 if (!conn->sco_rx_valid){ 3656 // ignore first 10 packets 3657 conn->sco_rx_count++; 3658 // log_debug("sco rx count %u", conn->sco_rx_count); 3659 if (conn->sco_rx_count == 10) { 3660 // use first timestamp as is and pretent it just started 3661 conn->sco_rx_ms = now; 3662 conn->sco_rx_valid = 1; 3663 conn->sco_rx_count = 0; 3664 sco_schedule_tx(conn); 3665 } 3666 } else { 3667 // track expected arrival timme 3668 conn->sco_rx_count++; 3669 conn->sco_rx_ms += 7; 3670 int delta = (int32_t) (now - conn->sco_rx_ms); 3671 if (delta > 0){ 3672 conn->sco_rx_ms++; 3673 } 3674 // log_debug("sco rx %u", conn->sco_rx_ms); 3675 sco_schedule_tx(conn); 3676 } 3677 } 3678 } 3679 #endif 3680 3681 // deliver to app 3682 if (hci_stack->sco_packet_handler) { 3683 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3684 } 3685 3686 #ifdef HAVE_SCO_TRANSPORT 3687 // We can send one packet for each received packet 3688 conn->sco_tx_ready++; 3689 hci_notify_if_sco_can_send_now(); 3690 #endif 3691 3692 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3693 conn->num_packets_completed++; 3694 hci_stack->host_completed_packets = 1; 3695 hci_run(); 3696 #endif 3697 } 3698 #endif 3699 3700 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3701 hci_dump_packet(packet_type, 1, packet, size); 3702 switch (packet_type) { 3703 case HCI_EVENT_PACKET: 3704 event_handler(packet, size); 3705 break; 3706 case HCI_ACL_DATA_PACKET: 3707 acl_handler(packet, size); 3708 break; 3709 #ifdef ENABLE_CLASSIC 3710 case HCI_SCO_DATA_PACKET: 3711 sco_handler(packet, size); 3712 break; 3713 #endif 3714 default: 3715 break; 3716 } 3717 } 3718 3719 /** 3720 * @brief Add event packet handler. 3721 */ 3722 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3723 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3724 } 3725 3726 /** 3727 * @brief Remove event packet handler. 3728 */ 3729 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3730 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3731 } 3732 3733 /** Register HCI packet handlers */ 3734 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3735 hci_stack->acl_packet_handler = handler; 3736 } 3737 3738 #ifdef ENABLE_CLASSIC 3739 /** 3740 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3741 */ 3742 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3743 hci_stack->sco_packet_handler = handler; 3744 } 3745 #endif 3746 3747 static void hci_state_reset(void){ 3748 // no connections yet 3749 hci_stack->connections = NULL; 3750 3751 // keep discoverable/connectable as this has been requested by the client(s) 3752 // hci_stack->discoverable = 0; 3753 // hci_stack->connectable = 0; 3754 // hci_stack->bondable = 1; 3755 // hci_stack->own_addr_type = 0; 3756 3757 // buffer is free 3758 hci_stack->hci_packet_buffer_reserved = false; 3759 3760 // no pending cmds 3761 hci_stack->decline_reason = 0; 3762 3763 hci_stack->secure_connections_active = false; 3764 3765 #ifdef ENABLE_CLASSIC 3766 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3767 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3768 3769 hci_stack->gap_tasks_classic = 3770 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3771 GAP_TASK_SET_CLASS_OF_DEVICE | 3772 GAP_TASK_SET_LOCAL_NAME | 3773 GAP_TASK_SET_EIR_DATA | 3774 GAP_TASK_WRITE_SCAN_ENABLE | 3775 GAP_TASK_WRITE_PAGE_TIMEOUT; 3776 #endif 3777 3778 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3779 hci_stack->classic_read_local_oob_data = false; 3780 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3781 #endif 3782 3783 // LE 3784 #ifdef ENABLE_BLE 3785 memset(hci_stack->le_random_address, 0, 6); 3786 hci_stack->le_random_address_set = 0; 3787 #endif 3788 #ifdef ENABLE_LE_CENTRAL 3789 hci_stack->le_scanning_active = false; 3790 hci_stack->le_scanning_param_update = true; 3791 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3792 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3793 hci_stack->le_whitelist_capacity = 0; 3794 #endif 3795 #ifdef ENABLE_LE_PERIPHERAL 3796 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3797 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3798 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3799 } 3800 if (hci_stack->le_advertisements_data != NULL){ 3801 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3802 } 3803 #endif 3804 } 3805 3806 #ifdef ENABLE_CLASSIC 3807 /** 3808 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3809 */ 3810 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3811 // store and open remote device db 3812 hci_stack->link_key_db = link_key_db; 3813 if (hci_stack->link_key_db) { 3814 hci_stack->link_key_db->open(); 3815 } 3816 } 3817 #endif 3818 3819 void hci_init(const hci_transport_t *transport, const void *config){ 3820 3821 #ifdef HAVE_MALLOC 3822 if (!hci_stack) { 3823 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3824 } 3825 #else 3826 hci_stack = &hci_stack_static; 3827 #endif 3828 memset(hci_stack, 0, sizeof(hci_stack_t)); 3829 3830 // reference to use transport layer implementation 3831 hci_stack->hci_transport = transport; 3832 3833 // reference to used config 3834 hci_stack->config = config; 3835 3836 // setup pointer for outgoing packet buffer 3837 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3838 3839 // max acl payload size defined in config.h 3840 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3841 3842 // register packet handlers with transport 3843 transport->register_packet_handler(&packet_handler); 3844 3845 hci_stack->state = HCI_STATE_OFF; 3846 3847 // class of device 3848 hci_stack->class_of_device = 0x007a020c; // Smartphone 3849 3850 // bondable by default 3851 hci_stack->bondable = 1; 3852 3853 #ifdef ENABLE_CLASSIC 3854 // classic name 3855 hci_stack->local_name = default_classic_name; 3856 3857 // Master slave policy 3858 hci_stack->master_slave_policy = 1; 3859 3860 // Allow Role Switch 3861 hci_stack->allow_role_switch = 1; 3862 3863 // Default / minimum security level = 2 3864 hci_stack->gap_security_level = LEVEL_2; 3865 3866 // Default Security Mode 4 3867 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3868 3869 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3870 hci_stack->gap_required_encyrption_key_size = 7; 3871 3872 // Link Supervision Timeout 3873 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3874 3875 #endif 3876 3877 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3878 hci_stack->ssp_enable = 1; 3879 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3880 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3881 hci_stack->ssp_auto_accept = 1; 3882 3883 // Secure Connections: enable (requires support from Controller) 3884 hci_stack->secure_connections_enable = true; 3885 3886 // voice setting - signed 16 bit pcm data with CVSD over the air 3887 hci_stack->sco_voice_setting = 0x60; 3888 3889 #ifdef ENABLE_LE_CENTRAL 3890 // connection parameter to use for outgoing connections 3891 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3892 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3893 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3894 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3895 hci_stack->le_connection_latency = 4; // 4 3896 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3897 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3898 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3899 3900 // default LE Scanning 3901 hci_stack->le_scan_type = 0x1; // active 3902 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3903 hci_stack->le_scan_window = 0x30; // 30 ms 3904 #endif 3905 3906 #ifdef ENABLE_LE_PERIPHERAL 3907 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3908 #endif 3909 3910 // connection parameter range used to answer connection parameter update requests in l2cap 3911 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3912 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3913 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3914 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3915 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3916 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3917 3918 hci_state_reset(); 3919 } 3920 3921 void hci_deinit(void){ 3922 btstack_run_loop_remove_timer(&hci_stack->timeout); 3923 #ifdef HAVE_MALLOC 3924 if (hci_stack) { 3925 free(hci_stack); 3926 } 3927 #endif 3928 hci_stack = NULL; 3929 3930 #ifdef ENABLE_CLASSIC 3931 disable_l2cap_timeouts = 0; 3932 #endif 3933 } 3934 3935 /** 3936 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3937 */ 3938 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3939 hci_stack->chipset = chipset_driver; 3940 3941 // reset chipset driver - init is also called on power_up 3942 if (hci_stack->chipset && hci_stack->chipset->init){ 3943 hci_stack->chipset->init(hci_stack->config); 3944 } 3945 } 3946 3947 /** 3948 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3949 */ 3950 void hci_set_control(const btstack_control_t *hardware_control){ 3951 // references to used control implementation 3952 hci_stack->control = hardware_control; 3953 // init with transport config 3954 hardware_control->init(hci_stack->config); 3955 } 3956 3957 static void hci_discard_connections(void){ 3958 btstack_linked_list_iterator_t lit; 3959 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3960 while (btstack_linked_list_iterator_has_next(&lit)){ 3961 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3962 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3963 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3964 hci_shutdown_connection(connection); 3965 } 3966 } 3967 3968 void hci_close(void){ 3969 3970 #ifdef ENABLE_CLASSIC 3971 // close remote device db 3972 if (hci_stack->link_key_db) { 3973 hci_stack->link_key_db->close(); 3974 } 3975 #endif 3976 3977 hci_discard_connections(); 3978 3979 hci_power_control(HCI_POWER_OFF); 3980 3981 #ifdef HAVE_MALLOC 3982 free(hci_stack); 3983 #endif 3984 hci_stack = NULL; 3985 } 3986 3987 #ifdef HAVE_SCO_TRANSPORT 3988 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3989 hci_stack->sco_transport = sco_transport; 3990 sco_transport->register_packet_handler(&packet_handler); 3991 } 3992 #endif 3993 3994 #ifdef ENABLE_CLASSIC 3995 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3996 // validate ranage and set 3997 if (encryption_key_size < 7) return; 3998 if (encryption_key_size > 16) return; 3999 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4000 } 4001 4002 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4003 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4004 hci_stack->gap_security_mode = security_mode; 4005 return ERROR_CODE_SUCCESS; 4006 } else { 4007 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4008 } 4009 } 4010 4011 gap_security_mode_t gap_get_security_mode(void){ 4012 return hci_stack->gap_security_mode; 4013 } 4014 4015 void gap_set_security_level(gap_security_level_t security_level){ 4016 hci_stack->gap_security_level = security_level; 4017 } 4018 4019 gap_security_level_t gap_get_security_level(void){ 4020 if (hci_stack->gap_secure_connections_only_mode){ 4021 return LEVEL_4; 4022 } 4023 return hci_stack->gap_security_level; 4024 } 4025 4026 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4027 hci_stack->gap_minimal_service_security_level = security_level; 4028 } 4029 4030 void gap_set_secure_connections_only_mode(bool enable){ 4031 hci_stack->gap_secure_connections_only_mode = enable; 4032 } 4033 4034 bool gap_get_secure_connections_only_mode(void){ 4035 return hci_stack->gap_secure_connections_only_mode; 4036 } 4037 #endif 4038 4039 #ifdef ENABLE_CLASSIC 4040 void gap_set_class_of_device(uint32_t class_of_device){ 4041 hci_stack->class_of_device = class_of_device; 4042 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4043 hci_run(); 4044 } 4045 4046 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4047 hci_stack->default_link_policy_settings = default_link_policy_settings; 4048 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4049 hci_run(); 4050 } 4051 4052 void gap_set_allow_role_switch(bool allow_role_switch){ 4053 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4054 } 4055 4056 uint8_t hci_get_allow_role_switch(void){ 4057 return hci_stack->allow_role_switch; 4058 } 4059 4060 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4061 hci_stack->link_supervision_timeout = link_supervision_timeout; 4062 } 4063 4064 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4065 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4066 } 4067 4068 uint16_t hci_automatic_flush_timeout(void){ 4069 return hci_stack->automatic_flush_timeout; 4070 } 4071 4072 void hci_disable_l2cap_timeout_check(void){ 4073 disable_l2cap_timeouts = 1; 4074 } 4075 #endif 4076 4077 #ifndef HAVE_HOST_CONTROLLER_API 4078 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4079 void hci_set_bd_addr(bd_addr_t addr){ 4080 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4081 hci_stack->custom_bd_addr_set = 1; 4082 } 4083 #endif 4084 4085 // State-Module-Driver overview 4086 // state module low-level 4087 // HCI_STATE_OFF off close 4088 // HCI_STATE_INITIALIZING, on open 4089 // HCI_STATE_WORKING, on open 4090 // HCI_STATE_HALTING, on open 4091 // HCI_STATE_SLEEPING, off/sleep close 4092 // HCI_STATE_FALLING_ASLEEP on open 4093 4094 static int hci_power_control_on(void){ 4095 4096 // power on 4097 int err = 0; 4098 if (hci_stack->control && hci_stack->control->on){ 4099 err = (*hci_stack->control->on)(); 4100 } 4101 if (err){ 4102 log_error( "POWER_ON failed"); 4103 hci_emit_hci_open_failed(); 4104 return err; 4105 } 4106 4107 // int chipset driver 4108 if (hci_stack->chipset && hci_stack->chipset->init){ 4109 hci_stack->chipset->init(hci_stack->config); 4110 } 4111 4112 // init transport 4113 if (hci_stack->hci_transport->init){ 4114 hci_stack->hci_transport->init(hci_stack->config); 4115 } 4116 4117 // open transport 4118 err = hci_stack->hci_transport->open(); 4119 if (err){ 4120 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4121 if (hci_stack->control && hci_stack->control->off){ 4122 (*hci_stack->control->off)(); 4123 } 4124 hci_emit_hci_open_failed(); 4125 return err; 4126 } 4127 return 0; 4128 } 4129 4130 static void hci_power_control_off(void){ 4131 4132 log_info("hci_power_control_off"); 4133 4134 // close low-level device 4135 hci_stack->hci_transport->close(); 4136 4137 log_info("hci_power_control_off - hci_transport closed"); 4138 4139 // power off 4140 if (hci_stack->control && hci_stack->control->off){ 4141 (*hci_stack->control->off)(); 4142 } 4143 4144 log_info("hci_power_control_off - control closed"); 4145 4146 hci_stack->state = HCI_STATE_OFF; 4147 } 4148 4149 static void hci_power_control_sleep(void){ 4150 4151 log_info("hci_power_control_sleep"); 4152 4153 #if 0 4154 // don't close serial port during sleep 4155 4156 // close low-level device 4157 hci_stack->hci_transport->close(hci_stack->config); 4158 #endif 4159 4160 // sleep mode 4161 if (hci_stack->control && hci_stack->control->sleep){ 4162 (*hci_stack->control->sleep)(); 4163 } 4164 4165 hci_stack->state = HCI_STATE_SLEEPING; 4166 } 4167 4168 static int hci_power_control_wake(void){ 4169 4170 log_info("hci_power_control_wake"); 4171 4172 // wake on 4173 if (hci_stack->control && hci_stack->control->wake){ 4174 (*hci_stack->control->wake)(); 4175 } 4176 4177 #if 0 4178 // open low-level device 4179 int err = hci_stack->hci_transport->open(hci_stack->config); 4180 if (err){ 4181 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4182 if (hci_stack->control && hci_stack->control->off){ 4183 (*hci_stack->control->off)(); 4184 } 4185 hci_emit_hci_open_failed(); 4186 return err; 4187 } 4188 #endif 4189 4190 return 0; 4191 } 4192 4193 static void hci_power_enter_initializing_state(void){ 4194 // set up state machine 4195 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4196 hci_stack->hci_packet_buffer_reserved = false; 4197 hci_stack->state = HCI_STATE_INITIALIZING; 4198 hci_stack->substate = HCI_INIT_SEND_RESET; 4199 } 4200 4201 static void hci_power_enter_halting_state(void){ 4202 #ifdef ENABLE_BLE 4203 hci_whitelist_free(); 4204 #endif 4205 // see hci_run 4206 hci_stack->state = HCI_STATE_HALTING; 4207 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4208 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4209 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4210 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4211 btstack_run_loop_add_timer(&hci_stack->timeout); 4212 } 4213 4214 // returns error 4215 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4216 int err; 4217 switch (power_mode){ 4218 case HCI_POWER_ON: 4219 err = hci_power_control_on(); 4220 if (err != 0) { 4221 log_error("hci_power_control_on() error %d", err); 4222 return err; 4223 } 4224 hci_power_enter_initializing_state(); 4225 break; 4226 case HCI_POWER_OFF: 4227 // do nothing 4228 break; 4229 case HCI_POWER_SLEEP: 4230 // do nothing (with SLEEP == OFF) 4231 break; 4232 default: 4233 btstack_assert(false); 4234 break; 4235 } 4236 return ERROR_CODE_SUCCESS; 4237 } 4238 4239 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4240 switch (power_mode){ 4241 case HCI_POWER_ON: 4242 // do nothing 4243 break; 4244 case HCI_POWER_OFF: 4245 // no connections yet, just turn it off 4246 hci_power_control_off(); 4247 break; 4248 case HCI_POWER_SLEEP: 4249 // no connections yet, just turn it off 4250 hci_power_control_sleep(); 4251 break; 4252 default: 4253 btstack_assert(false); 4254 break; 4255 } 4256 return ERROR_CODE_SUCCESS; 4257 } 4258 4259 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4260 switch (power_mode){ 4261 case HCI_POWER_ON: 4262 // do nothing 4263 break; 4264 case HCI_POWER_OFF: 4265 hci_power_enter_halting_state(); 4266 break; 4267 case HCI_POWER_SLEEP: 4268 // see hci_run 4269 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4270 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4271 break; 4272 default: 4273 btstack_assert(false); 4274 break; 4275 } 4276 return ERROR_CODE_SUCCESS; 4277 } 4278 4279 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4280 switch (power_mode){ 4281 case HCI_POWER_ON: 4282 hci_power_enter_initializing_state(); 4283 break; 4284 case HCI_POWER_OFF: 4285 // do nothing 4286 break; 4287 case HCI_POWER_SLEEP: 4288 // see hci_run 4289 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4290 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4291 break; 4292 default: 4293 btstack_assert(false); 4294 break; 4295 } 4296 return ERROR_CODE_SUCCESS; 4297 } 4298 4299 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4300 switch (power_mode){ 4301 case HCI_POWER_ON: 4302 hci_power_enter_initializing_state(); 4303 break; 4304 case HCI_POWER_OFF: 4305 hci_power_enter_halting_state(); 4306 break; 4307 case HCI_POWER_SLEEP: 4308 // do nothing 4309 break; 4310 default: 4311 btstack_assert(false); 4312 break; 4313 } 4314 return ERROR_CODE_SUCCESS; 4315 } 4316 4317 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4318 int err; 4319 switch (power_mode){ 4320 case HCI_POWER_ON: 4321 err = hci_power_control_wake(); 4322 if (err) return err; 4323 hci_power_enter_initializing_state(); 4324 break; 4325 case HCI_POWER_OFF: 4326 hci_power_enter_halting_state(); 4327 break; 4328 case HCI_POWER_SLEEP: 4329 // do nothing 4330 break; 4331 default: 4332 btstack_assert(false); 4333 break; 4334 } 4335 return ERROR_CODE_SUCCESS; 4336 } 4337 4338 int hci_power_control(HCI_POWER_MODE power_mode){ 4339 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4340 int err = 0; 4341 switch (hci_stack->state){ 4342 case HCI_STATE_OFF: 4343 err = hci_power_control_state_off(power_mode); 4344 break; 4345 case HCI_STATE_INITIALIZING: 4346 err = hci_power_control_state_initializing(power_mode); 4347 break; 4348 case HCI_STATE_WORKING: 4349 err = hci_power_control_state_working(power_mode); 4350 break; 4351 case HCI_STATE_HALTING: 4352 err = hci_power_control_state_halting(power_mode); 4353 break; 4354 case HCI_STATE_FALLING_ASLEEP: 4355 err = hci_power_control_state_falling_asleep(power_mode); 4356 break; 4357 case HCI_STATE_SLEEPING: 4358 err = hci_power_control_state_sleeping(power_mode); 4359 break; 4360 default: 4361 btstack_assert(false); 4362 break; 4363 } 4364 if (err != 0){ 4365 return err; 4366 } 4367 4368 // create internal event 4369 hci_emit_state(); 4370 4371 // trigger next/first action 4372 hci_run(); 4373 4374 return 0; 4375 } 4376 4377 4378 static void hci_halting_run(void) { 4379 4380 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4381 4382 hci_connection_t *connection; 4383 #ifdef ENABLE_BLE 4384 #ifdef ENABLE_LE_PERIPHERAL 4385 bool stop_advertismenets; 4386 #endif 4387 #endif 4388 4389 switch (hci_stack->substate) { 4390 case HCI_HALTING_CLASSIC_STOP: 4391 #ifdef ENABLE_CLASSIC 4392 if (!hci_can_send_command_packet_now()) return; 4393 4394 if (hci_stack->connectable || hci_stack->discoverable){ 4395 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4396 hci_send_cmd(&hci_write_scan_enable, 0); 4397 return; 4398 } 4399 #endif 4400 /* fall through */ 4401 4402 case HCI_HALTING_LE_ADV_STOP: 4403 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4404 4405 #ifdef ENABLE_BLE 4406 #ifdef ENABLE_LE_PERIPHERAL 4407 if (!hci_can_send_command_packet_now()) return; 4408 4409 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4410 4411 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4412 if (hci_extended_advertising_supported()){ 4413 btstack_linked_list_iterator_t it; 4414 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4415 // stop all periodic advertisements and check if an extended set is active 4416 while (btstack_linked_list_iterator_has_next(&it)){ 4417 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4418 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4419 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4420 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4421 return; 4422 } 4423 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4424 stop_advertismenets = true; 4425 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4426 } 4427 } 4428 if (stop_advertismenets){ 4429 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4430 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4431 return; 4432 } 4433 } 4434 else 4435 #else 4436 { 4437 if (stop_advertismenets) { 4438 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4439 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4440 return; 4441 } 4442 } 4443 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4444 #endif /* ENABLE_LE_PERIPHERAL */ 4445 #endif /* ENABLE_BLE */ 4446 4447 /* fall through */ 4448 4449 case HCI_HALTING_LE_SCAN_STOP: 4450 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4451 if (!hci_can_send_command_packet_now()) return; 4452 4453 #ifdef ENABLE_BLE 4454 #ifdef ENABLE_LE_CENTRAL 4455 if (hci_stack->le_scanning_active){ 4456 hci_le_scan_stop(); 4457 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4458 return; 4459 } 4460 #endif 4461 #endif 4462 4463 /* fall through */ 4464 4465 case HCI_HALTING_DISCONNECT_ALL: 4466 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4467 if (!hci_can_send_command_packet_now()) return; 4468 4469 // close all open connections 4470 connection = (hci_connection_t *) hci_stack->connections; 4471 if (connection) { 4472 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4473 4474 // check state 4475 if (connection->state == SENT_DISCONNECT) return; 4476 connection->state = SENT_DISCONNECT; 4477 4478 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4479 4480 // finally, send the disconnect command 4481 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4482 return; 4483 } 4484 4485 btstack_run_loop_remove_timer(&hci_stack->timeout); 4486 4487 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4488 4489 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4490 log_info("HCI_STATE_HALTING: wait 50 ms"); 4491 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4492 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4493 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4494 btstack_run_loop_add_timer(&hci_stack->timeout); 4495 break; 4496 4497 case HCI_HALTING_CLOSE: 4498 // close left over connections (that had not been properly closed before) 4499 hci_discard_connections(); 4500 4501 log_info("HCI_STATE_HALTING, calling off"); 4502 4503 // switch mode 4504 hci_power_control_off(); 4505 4506 log_info("HCI_STATE_HALTING, emitting state"); 4507 hci_emit_state(); 4508 log_info("HCI_STATE_HALTING, done"); 4509 break; 4510 4511 case HCI_HALTING_W4_CLOSE_TIMER: 4512 // keep waiting 4513 4514 break; 4515 default: 4516 break; 4517 } 4518 }; 4519 4520 static void hci_falling_asleep_run(void){ 4521 hci_connection_t * connection; 4522 switch(hci_stack->substate) { 4523 case HCI_FALLING_ASLEEP_DISCONNECT: 4524 log_info("HCI_STATE_FALLING_ASLEEP"); 4525 // close all open connections 4526 connection = (hci_connection_t *) hci_stack->connections; 4527 if (connection){ 4528 4529 // send disconnect 4530 if (!hci_can_send_command_packet_now()) return; 4531 4532 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4533 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4534 4535 // send disconnected event right away - causes higher layer connections to get closed, too. 4536 hci_shutdown_connection(connection); 4537 return; 4538 } 4539 4540 if (hci_classic_supported()){ 4541 // disable page and inquiry scan 4542 if (!hci_can_send_command_packet_now()) return; 4543 4544 log_info("HCI_STATE_HALTING, disabling inq scans"); 4545 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4546 4547 // continue in next sub state 4548 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4549 break; 4550 } 4551 4552 /* fall through */ 4553 4554 case HCI_FALLING_ASLEEP_COMPLETE: 4555 log_info("HCI_STATE_HALTING, calling sleep"); 4556 // switch mode 4557 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4558 hci_emit_state(); 4559 break; 4560 4561 default: 4562 break; 4563 } 4564 } 4565 4566 #ifdef ENABLE_CLASSIC 4567 4568 static void hci_update_scan_enable(void){ 4569 // 2 = page scan, 1 = inq scan 4570 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4571 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4572 hci_run(); 4573 } 4574 4575 void gap_discoverable_control(uint8_t enable){ 4576 if (enable) enable = 1; // normalize argument 4577 4578 if (hci_stack->discoverable == enable){ 4579 hci_emit_discoverable_enabled(hci_stack->discoverable); 4580 return; 4581 } 4582 4583 hci_stack->discoverable = enable; 4584 hci_update_scan_enable(); 4585 } 4586 4587 void gap_connectable_control(uint8_t enable){ 4588 if (enable) enable = 1; // normalize argument 4589 4590 // don't emit event 4591 if (hci_stack->connectable == enable) return; 4592 4593 hci_stack->connectable = enable; 4594 hci_update_scan_enable(); 4595 } 4596 #endif 4597 4598 void gap_local_bd_addr(bd_addr_t address_buffer){ 4599 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4600 } 4601 4602 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4603 static void hci_host_num_completed_packets(void){ 4604 4605 // create packet manually as arrays are not supported and num_commands should not get reduced 4606 hci_reserve_packet_buffer(); 4607 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4608 4609 uint16_t size = 0; 4610 uint16_t num_handles = 0; 4611 packet[size++] = 0x35; 4612 packet[size++] = 0x0c; 4613 size++; // skip param len 4614 size++; // skip num handles 4615 4616 // add { handle, packets } entries 4617 btstack_linked_item_t * it; 4618 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4619 hci_connection_t * connection = (hci_connection_t *) it; 4620 if (connection->num_packets_completed){ 4621 little_endian_store_16(packet, size, connection->con_handle); 4622 size += 2; 4623 little_endian_store_16(packet, size, connection->num_packets_completed); 4624 size += 2; 4625 // 4626 num_handles++; 4627 connection->num_packets_completed = 0; 4628 } 4629 } 4630 4631 packet[2] = size - 3; 4632 packet[3] = num_handles; 4633 4634 hci_stack->host_completed_packets = 0; 4635 4636 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4637 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4638 4639 // release packet buffer for synchronous transport implementations 4640 if (hci_transport_synchronous()){ 4641 hci_release_packet_buffer(); 4642 hci_emit_transport_packet_sent(); 4643 } 4644 } 4645 #endif 4646 4647 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4648 UNUSED(ds); 4649 hci_stack->substate = HCI_HALTING_CLOSE; 4650 // allow packet handlers to defer final shutdown 4651 hci_emit_state(); 4652 hci_run(); 4653 } 4654 4655 static bool hci_run_acl_fragments(void){ 4656 if (hci_stack->acl_fragmentation_total_size > 0u) { 4657 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4658 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4659 if (connection) { 4660 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4661 hci_send_acl_packet_fragments(connection); 4662 return true; 4663 } 4664 } else { 4665 // connection gone -> discard further fragments 4666 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4667 hci_stack->acl_fragmentation_total_size = 0; 4668 hci_stack->acl_fragmentation_pos = 0; 4669 } 4670 } 4671 return false; 4672 } 4673 4674 #ifdef ENABLE_CLASSIC 4675 4676 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4677 static bool hci_classic_operation_active(void) { 4678 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4679 return true; 4680 } 4681 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4682 return true; 4683 } 4684 btstack_linked_item_t * it; 4685 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4686 hci_connection_t *connection = (hci_connection_t *) it; 4687 switch (connection->state) { 4688 case SENT_CREATE_CONNECTION: 4689 case SENT_CANCEL_CONNECTION: 4690 case SENT_DISCONNECT: 4691 return true; 4692 default: 4693 break; 4694 } 4695 } 4696 return false; 4697 } 4698 #endif 4699 4700 static bool hci_run_general_gap_classic(void){ 4701 4702 // assert stack is working and classic is active 4703 if (hci_classic_supported() == false) return false; 4704 if (hci_stack->state != HCI_STATE_WORKING) return false; 4705 4706 // decline incoming connections 4707 if (hci_stack->decline_reason){ 4708 uint8_t reason = hci_stack->decline_reason; 4709 hci_stack->decline_reason = 0; 4710 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4711 return true; 4712 } 4713 4714 if (hci_stack->gap_tasks_classic != 0){ 4715 hci_run_gap_tasks_classic(); 4716 return true; 4717 } 4718 4719 // start/stop inquiry 4720 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4721 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4722 if (hci_classic_operation_active() == false) 4723 #endif 4724 { 4725 uint8_t duration = hci_stack->inquiry_state; 4726 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4727 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4728 return true; 4729 } 4730 } 4731 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4732 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4733 hci_send_cmd(&hci_inquiry_cancel); 4734 return true; 4735 } 4736 // remote name request 4737 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4738 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4739 if (hci_classic_operation_active() == false) 4740 #endif 4741 { 4742 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4743 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4744 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4745 return true; 4746 } 4747 } 4748 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4749 // Local OOB data 4750 if (hci_stack->classic_read_local_oob_data){ 4751 hci_stack->classic_read_local_oob_data = false; 4752 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4753 hci_send_cmd(&hci_read_local_extended_oob_data); 4754 } else { 4755 hci_send_cmd(&hci_read_local_oob_data); 4756 } 4757 } 4758 #endif 4759 // pairing 4760 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4761 uint8_t state = hci_stack->gap_pairing_state; 4762 uint8_t pin_code[16]; 4763 switch (state){ 4764 case GAP_PAIRING_STATE_SEND_PIN: 4765 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4766 memset(pin_code, 0, 16); 4767 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4768 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4769 break; 4770 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4771 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4772 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4773 break; 4774 case GAP_PAIRING_STATE_SEND_PASSKEY: 4775 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4776 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4777 break; 4778 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4779 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4780 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4781 break; 4782 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4783 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4784 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4785 break; 4786 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4787 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4788 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4789 break; 4790 default: 4791 break; 4792 } 4793 return true; 4794 } 4795 return false; 4796 } 4797 #endif 4798 4799 #ifdef ENABLE_BLE 4800 4801 #ifdef ENABLE_LE_CENTRAL 4802 static void hci_le_scan_stop(void){ 4803 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4804 if (hci_extended_advertising_supported()) { 4805 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4806 } else 4807 #endif 4808 { 4809 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4810 } 4811 } 4812 #endif 4813 4814 #ifdef ENABLE_LE_PERIPHERAL 4815 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4816 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4817 uint8_t operation = 0; 4818 if (pos == 0){ 4819 // first fragment or complete data 4820 operation |= 1; 4821 } 4822 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4823 // last fragment or complete data 4824 operation |= 2; 4825 } 4826 return operation; 4827 } 4828 #endif 4829 #endif 4830 4831 static bool hci_run_general_gap_le(void){ 4832 4833 // Phase 1: collect what to stop 4834 4835 bool scanning_stop = false; 4836 bool connecting_stop = false; 4837 bool advertising_stop = false; 4838 4839 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4840 le_advertising_set_t * advertising_stop_set = NULL; 4841 bool periodic_stop = false; 4842 #endif 4843 4844 #ifndef ENABLE_LE_CENTRAL 4845 UNUSED(scanning_stop); 4846 UNUSED(connecting_stop); 4847 #endif 4848 #ifndef ENABLE_LE_PERIPHERAL 4849 UNUSED(advertising_stop); 4850 #endif 4851 4852 // check if own address changes 4853 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4854 4855 // check if whitelist needs modification 4856 bool whitelist_modification_pending = false; 4857 btstack_linked_list_iterator_t lit; 4858 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4859 while (btstack_linked_list_iterator_has_next(&lit)){ 4860 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4861 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4862 whitelist_modification_pending = true; 4863 break; 4864 } 4865 } 4866 // check if resolving list needs modification 4867 bool resolving_list_modification_pending = false; 4868 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4869 4870 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4871 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4872 resolving_list_modification_pending = true; 4873 } 4874 #endif 4875 4876 #ifdef ENABLE_LE_CENTRAL 4877 // scanning control 4878 if (hci_stack->le_scanning_active) { 4879 // stop if: 4880 // - parameter change required 4881 // - it's disabled 4882 // - whitelist change required but used for scanning 4883 // - resolving list modified 4884 // - own address changes 4885 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4886 if ((hci_stack->le_scanning_param_update) || 4887 !hci_stack->le_scanning_enabled || 4888 (scanning_uses_whitelist && whitelist_modification_pending) || 4889 resolving_list_modification_pending || 4890 random_address_change){ 4891 4892 scanning_stop = true; 4893 } 4894 } 4895 #endif 4896 4897 #ifdef ENABLE_LE_CENTRAL 4898 // connecting control 4899 bool connecting_with_whitelist; 4900 switch (hci_stack->le_connecting_state){ 4901 case LE_CONNECTING_DIRECT: 4902 case LE_CONNECTING_WHITELIST: 4903 // stop connecting if: 4904 // - connecting uses white and whitelist modification pending 4905 // - if it got disabled 4906 // - resolving list modified 4907 // - own address changes 4908 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4909 if ((connecting_with_whitelist && whitelist_modification_pending) || 4910 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4911 resolving_list_modification_pending || 4912 random_address_change) { 4913 4914 connecting_stop = true; 4915 } 4916 break; 4917 default: 4918 break; 4919 } 4920 #endif 4921 4922 #ifdef ENABLE_LE_PERIPHERAL 4923 // le advertisement control 4924 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4925 // stop if: 4926 // - parameter change required 4927 // - random address used in advertising and changes 4928 // - it's disabled 4929 // - whitelist change required but used for advertisement filter policy 4930 // - resolving list modified 4931 // - own address changes 4932 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4933 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4934 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4935 if (advertising_change || 4936 (advertising_uses_random_address && random_address_change) || 4937 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4938 (advertising_uses_whitelist && whitelist_modification_pending) || 4939 resolving_list_modification_pending || 4940 random_address_change) { 4941 4942 advertising_stop = true; 4943 } 4944 } 4945 4946 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4947 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4948 btstack_linked_list_iterator_t it; 4949 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4950 while (btstack_linked_list_iterator_has_next(&it)){ 4951 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4952 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4953 // stop if: 4954 // - parameter change required 4955 // - random address used in connectable advertising and changes 4956 // - it's disabled 4957 // - whitelist change required but used for advertisement filter policy 4958 // - resolving list modified 4959 // - own address changes 4960 // - advertisement set will be removed 4961 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4962 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4963 bool advertising_uses_random_address = 4964 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4965 advertising_connectable; 4966 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4967 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4968 bool advertising_set_random_address_change = 4969 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4970 bool advertising_set_will_be_removed = 4971 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4972 if (advertising_parameter_change || 4973 (advertising_uses_random_address && advertising_set_random_address_change) || 4974 (advertising_enabled == false) || 4975 (advertising_uses_whitelist && whitelist_modification_pending) || 4976 resolving_list_modification_pending || 4977 advertising_set_will_be_removed) { 4978 4979 advertising_stop = true; 4980 advertising_stop_set = advertising_set; 4981 break; 4982 } 4983 } 4984 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4985 // stop if: 4986 // - it's disabled 4987 // - parameter change required 4988 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4989 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4990 if ((periodic_enabled == false) || periodic_parameter_change){ 4991 periodic_stop = true; 4992 advertising_stop_set = advertising_set; 4993 } 4994 } 4995 } 4996 } 4997 #endif 4998 4999 #endif 5000 5001 5002 // Phase 2: stop everything that should be off during modifications 5003 5004 #ifdef ENABLE_LE_CENTRAL 5005 if (scanning_stop){ 5006 hci_stack->le_scanning_active = false; 5007 hci_le_scan_stop(); 5008 return true; 5009 } 5010 #endif 5011 5012 #ifdef ENABLE_LE_CENTRAL 5013 if (connecting_stop){ 5014 hci_send_cmd(&hci_le_create_connection_cancel); 5015 return true; 5016 } 5017 #endif 5018 5019 #ifdef ENABLE_LE_PERIPHERAL 5020 if (advertising_stop){ 5021 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5022 if (hci_extended_advertising_supported()) { 5023 uint8_t advertising_stop_handle; 5024 if (advertising_stop_set != NULL){ 5025 advertising_stop_handle = advertising_stop_set->advertising_handle; 5026 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5027 } else { 5028 advertising_stop_handle = 0; 5029 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5030 } 5031 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5032 const uint16_t durations[] = { 0 }; 5033 const uint16_t max_events[] = { 0 }; 5034 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5035 } else 5036 #endif 5037 { 5038 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5039 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5040 } 5041 return true; 5042 } 5043 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5044 if (periodic_stop){ 5045 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5046 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5047 return true; 5048 } 5049 #endif 5050 #endif 5051 5052 // Phase 3: modify 5053 5054 if (random_address_change){ 5055 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5056 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5057 if (hci_extended_advertising_supported()) { 5058 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5059 } 5060 #endif 5061 { 5062 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5063 } 5064 return true; 5065 } 5066 5067 #ifdef ENABLE_LE_CENTRAL 5068 if (hci_stack->le_scanning_param_update){ 5069 hci_stack->le_scanning_param_update = false; 5070 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5071 if (hci_extended_advertising_supported()){ 5072 // prepare arrays for all PHYs 5073 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5074 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5075 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5076 uint8_t scanning_phys = 1; // LE 1M PHY 5077 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5078 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5079 } else 5080 #endif 5081 { 5082 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5083 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5084 } 5085 return true; 5086 } 5087 #endif 5088 5089 #ifdef ENABLE_LE_PERIPHERAL 5090 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5091 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5092 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5093 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5094 if (hci_extended_advertising_supported()){ 5095 // map advertisment type to advertising event properties 5096 uint16_t adv_event_properties = 0; 5097 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5098 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5099 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5100 } 5101 hci_stack->le_advertising_set_in_current_command = 0; 5102 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5103 0, 5104 adv_event_properties, 5105 hci_stack->le_advertisements_interval_min, 5106 hci_stack->le_advertisements_interval_max, 5107 hci_stack->le_advertisements_channel_map, 5108 hci_stack->le_advertisements_own_addr_type, 5109 hci_stack->le_advertisements_direct_address_type, 5110 hci_stack->le_advertisements_direct_address, 5111 hci_stack->le_advertisements_filter_policy, 5112 0x7f, // tx power: no preference 5113 0x01, // primary adv phy: LE 1M 5114 0, // secondary adv max skip 5115 0, // secondary adv phy 5116 0, // adv sid 5117 0 // scan request notification 5118 ); 5119 } 5120 #endif 5121 { 5122 hci_send_cmd(&hci_le_set_advertising_parameters, 5123 hci_stack->le_advertisements_interval_min, 5124 hci_stack->le_advertisements_interval_max, 5125 hci_stack->le_advertisements_type, 5126 hci_stack->le_advertisements_own_addr_type, 5127 hci_stack->le_advertisements_direct_address_type, 5128 hci_stack->le_advertisements_direct_address, 5129 hci_stack->le_advertisements_channel_map, 5130 hci_stack->le_advertisements_filter_policy); 5131 } 5132 return true; 5133 } 5134 5135 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5136 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5137 uint8_t adv_data_clean[31]; 5138 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5139 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5140 hci_stack->le_advertisements_data_len); 5141 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5142 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5143 if (hci_extended_advertising_supported()){ 5144 hci_stack->le_advertising_set_in_current_command = 0; 5145 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5146 } else 5147 #endif 5148 { 5149 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5150 } 5151 return true; 5152 } 5153 5154 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5155 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5156 uint8_t scan_data_clean[31]; 5157 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5158 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5159 hci_stack->le_scan_response_data_len); 5160 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5161 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5162 if (hci_extended_advertising_supported()){ 5163 hci_stack->le_advertising_set_in_current_command = 0; 5164 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5165 } else 5166 #endif 5167 { 5168 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5169 } 5170 return true; 5171 } 5172 5173 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5174 if (hci_extended_advertising_supported()) { 5175 btstack_linked_list_iterator_t it; 5176 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5177 while (btstack_linked_list_iterator_has_next(&it)){ 5178 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5179 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5180 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5181 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5182 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5183 return true; 5184 } 5185 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5186 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5187 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5188 return true; 5189 } 5190 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5191 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5192 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5193 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5194 advertising_set->advertising_handle, 5195 advertising_set->extended_params.advertising_event_properties, 5196 advertising_set->extended_params.primary_advertising_interval_min, 5197 advertising_set->extended_params.primary_advertising_interval_max, 5198 advertising_set->extended_params.primary_advertising_channel_map, 5199 advertising_set->extended_params.own_address_type, 5200 advertising_set->extended_params.peer_address_type, 5201 advertising_set->extended_params.peer_address, 5202 advertising_set->extended_params.advertising_filter_policy, 5203 advertising_set->extended_params.advertising_tx_power, 5204 advertising_set->extended_params.primary_advertising_phy, 5205 advertising_set->extended_params.secondary_advertising_max_skip, 5206 advertising_set->extended_params.secondary_advertising_phy, 5207 advertising_set->extended_params.advertising_sid, 5208 advertising_set->extended_params.scan_request_notification_enable 5209 ); 5210 return true; 5211 } 5212 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5213 uint16_t pos = advertising_set->adv_data_pos; 5214 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5215 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5216 if ((operation & 0x02) != 0){ 5217 // last fragment or complete data 5218 operation |= 2; 5219 advertising_set->adv_data_pos = 0; 5220 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5221 } else { 5222 advertising_set->adv_data_pos += data_to_upload; 5223 } 5224 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5225 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5226 return true; 5227 } 5228 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5229 uint16_t pos = advertising_set->scan_data_pos; 5230 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5231 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5232 if ((operation & 0x02) != 0){ 5233 advertising_set->scan_data_pos = 0; 5234 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5235 } else { 5236 advertising_set->scan_data_pos += data_to_upload; 5237 } 5238 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5239 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5240 return true; 5241 } 5242 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5243 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5244 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5245 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5246 advertising_set->advertising_handle, 5247 advertising_set->periodic_params.periodic_advertising_interval_min, 5248 advertising_set->periodic_params.periodic_advertising_interval_max, 5249 advertising_set->periodic_params.periodic_advertising_properties); 5250 return true; 5251 } 5252 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5253 uint16_t pos = advertising_set->periodic_data_pos; 5254 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5255 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5256 if ((operation & 0x02) != 0){ 5257 // last fragment or complete data 5258 operation |= 2; 5259 advertising_set->periodic_data_pos = 0; 5260 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5261 } else { 5262 advertising_set->periodic_data_pos += data_to_upload; 5263 } 5264 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5265 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5266 return true; 5267 } 5268 } 5269 } 5270 #endif 5271 5272 5273 #endif 5274 5275 5276 #ifdef ENABLE_LE_CENTRAL 5277 // if connect with whitelist was active and is not cancelled yet, wait until next time 5278 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5279 #endif 5280 5281 // LE Whitelist Management 5282 if (whitelist_modification_pending){ 5283 // add/remove entries 5284 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5285 while (btstack_linked_list_iterator_has_next(&lit)){ 5286 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5287 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5288 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5289 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5290 return true; 5291 } 5292 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5293 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5294 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5295 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5296 return true; 5297 } 5298 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5299 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5300 btstack_memory_whitelist_entry_free(entry); 5301 } 5302 } 5303 } 5304 5305 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5306 // LE Resolving List Management 5307 if (resolving_list_supported) { 5308 uint16_t i; 5309 switch (hci_stack->le_resolving_list_state) { 5310 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5311 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5312 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5313 return true; 5314 case LE_RESOLVING_LIST_READ_SIZE: 5315 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5316 hci_send_cmd(&hci_le_read_resolving_list_size); 5317 return true; 5318 case LE_RESOLVING_LIST_SEND_CLEAR: 5319 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5320 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5321 sizeof(hci_stack->le_resolving_list_add_entries)); 5322 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5323 sizeof(hci_stack->le_resolving_list_remove_entries)); 5324 hci_send_cmd(&hci_le_clear_resolving_list); 5325 return true; 5326 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5327 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5328 uint8_t offset = i >> 3; 5329 uint8_t mask = 1 << (i & 7); 5330 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5331 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5332 bd_addr_t peer_identity_addreses; 5333 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5334 sm_key_t peer_irk; 5335 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5336 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5337 5338 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5339 // trigger whitelist entry 'update' (work around for controller bug) 5340 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5341 while (btstack_linked_list_iterator_has_next(&lit)) { 5342 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5343 if (entry->address_type != peer_identity_addr_type) continue; 5344 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5345 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5346 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5347 } 5348 #endif 5349 5350 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5351 peer_identity_addreses); 5352 return true; 5353 } 5354 5355 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5356 5357 /* fall through */ 5358 5359 case LE_RESOLVING_LIST_ADD_ENTRIES: 5360 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5361 uint8_t offset = i >> 3; 5362 uint8_t mask = 1 << (i & 7); 5363 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5364 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5365 bd_addr_t peer_identity_addreses; 5366 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5367 sm_key_t peer_irk; 5368 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5369 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5370 const uint8_t *local_irk = gap_get_persistent_irk(); 5371 // command uses format specifier 'P' that stores 16-byte value without flip 5372 uint8_t local_irk_flipped[16]; 5373 uint8_t peer_irk_flipped[16]; 5374 reverse_128(local_irk, local_irk_flipped); 5375 reverse_128(peer_irk, peer_irk_flipped); 5376 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5377 peer_irk_flipped, local_irk_flipped); 5378 return true; 5379 } 5380 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5381 break; 5382 5383 default: 5384 break; 5385 } 5386 } 5387 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5388 #endif 5389 5390 // post-pone all actions until stack is fully working 5391 if (hci_stack->state != HCI_STATE_WORKING) return false; 5392 5393 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5394 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5395 5396 // Phase 4: restore state 5397 5398 #ifdef ENABLE_LE_CENTRAL 5399 // re-start scanning 5400 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5401 hci_stack->le_scanning_active = true; 5402 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5403 if (hci_extended_advertising_supported()){ 5404 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5405 } else 5406 #endif 5407 { 5408 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5409 } 5410 return true; 5411 } 5412 #endif 5413 5414 #ifdef ENABLE_LE_CENTRAL 5415 // re-start connecting 5416 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5417 bd_addr_t null_addr; 5418 memset(null_addr, 0, 6); 5419 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5420 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5421 hci_send_cmd(&hci_le_create_connection, 5422 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5423 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5424 1, // use whitelist 5425 0, // peer address type 5426 null_addr, // peer bd addr 5427 hci_stack->le_connection_own_addr_type, // our addr type: 5428 hci_stack->le_connection_interval_min, // conn interval min 5429 hci_stack->le_connection_interval_max, // conn interval max 5430 hci_stack->le_connection_latency, // conn latency 5431 hci_stack->le_supervision_timeout, // conn latency 5432 hci_stack->le_minimum_ce_length, // min ce length 5433 hci_stack->le_maximum_ce_length // max ce length 5434 ); 5435 return true; 5436 } 5437 #endif 5438 5439 #ifdef ENABLE_LE_PERIPHERAL 5440 // re-start advertising 5441 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5442 // check if advertisements should be enabled given 5443 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5444 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5445 5446 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5447 if (hci_extended_advertising_supported()){ 5448 const uint8_t advertising_handles[] = { 0 }; 5449 const uint16_t durations[] = { 0 }; 5450 const uint16_t max_events[] = { 0 }; 5451 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5452 } else 5453 #endif 5454 { 5455 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5456 } 5457 return true; 5458 } 5459 5460 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5461 if (hci_extended_advertising_supported()) { 5462 btstack_linked_list_iterator_t it; 5463 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5464 while (btstack_linked_list_iterator_has_next(&it)) { 5465 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5466 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5467 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5468 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5469 const uint16_t durations[] = { advertising_set->enable_timeout }; 5470 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5471 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5472 return true; 5473 } 5474 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5475 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5476 uint8_t enable = 1; 5477 if (advertising_set->periodic_include_adi){ 5478 enable |= 2; 5479 } 5480 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5481 return true; 5482 } 5483 } 5484 } 5485 #endif 5486 #endif 5487 5488 return false; 5489 } 5490 #endif 5491 5492 static bool hci_run_general_pending_commands(void){ 5493 btstack_linked_item_t * it; 5494 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5495 hci_connection_t * connection = (hci_connection_t *) it; 5496 5497 switch(connection->state){ 5498 case SEND_CREATE_CONNECTION: 5499 switch(connection->address_type){ 5500 #ifdef ENABLE_CLASSIC 5501 case BD_ADDR_TYPE_ACL: 5502 log_info("sending hci_create_connection"); 5503 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5504 break; 5505 #endif 5506 default: 5507 #ifdef ENABLE_BLE 5508 #ifdef ENABLE_LE_CENTRAL 5509 log_info("sending hci_le_create_connection"); 5510 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5511 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5512 hci_send_cmd(&hci_le_create_connection, 5513 hci_stack->le_connection_scan_interval, // conn scan interval 5514 hci_stack->le_connection_scan_window, // conn scan windows 5515 0, // don't use whitelist 5516 connection->address_type, // peer address type 5517 connection->address, // peer bd addr 5518 hci_stack->le_connection_own_addr_type, // our addr type: 5519 hci_stack->le_connection_interval_min, // conn interval min 5520 hci_stack->le_connection_interval_max, // conn interval max 5521 hci_stack->le_connection_latency, // conn latency 5522 hci_stack->le_supervision_timeout, // conn latency 5523 hci_stack->le_minimum_ce_length, // min ce length 5524 hci_stack->le_maximum_ce_length // max ce length 5525 ); 5526 connection->state = SENT_CREATE_CONNECTION; 5527 #endif 5528 #endif 5529 break; 5530 } 5531 return true; 5532 5533 #ifdef ENABLE_CLASSIC 5534 case RECEIVED_CONNECTION_REQUEST: 5535 connection->role = HCI_ROLE_SLAVE; 5536 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5537 log_info("sending hci_accept_connection_request"); 5538 connection->state = ACCEPTED_CONNECTION_REQUEST; 5539 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5540 return true; 5541 } 5542 break; 5543 #endif 5544 5545 #ifdef ENABLE_BLE 5546 #ifdef ENABLE_LE_CENTRAL 5547 case SEND_CANCEL_CONNECTION: 5548 connection->state = SENT_CANCEL_CONNECTION; 5549 hci_send_cmd(&hci_le_create_connection_cancel); 5550 return true; 5551 #endif 5552 #endif 5553 case SEND_DISCONNECT: 5554 connection->state = SENT_DISCONNECT; 5555 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5556 return true; 5557 5558 default: 5559 break; 5560 } 5561 5562 // no further commands if connection is about to get shut down 5563 if (connection->state == SENT_DISCONNECT) continue; 5564 5565 #ifdef ENABLE_CLASSIC 5566 5567 // Handling link key request requires remote supported features 5568 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5569 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5570 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5571 5572 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5573 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5574 if (have_link_key && security_level_sufficient){ 5575 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5576 } else { 5577 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5578 } 5579 return true; 5580 } 5581 5582 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5583 log_info("denying to pin request"); 5584 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5585 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5586 return true; 5587 } 5588 5589 // security assessment requires remote features 5590 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5591 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5592 hci_ssp_assess_security_on_io_cap_request(connection); 5593 // no return here as hci_ssp_assess_security_on_io_cap_request only sets AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY or AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY 5594 } 5595 5596 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5597 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5598 // set authentication requirements: 5599 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5600 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5601 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5602 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5603 authreq |= 1; 5604 } 5605 bool bonding = hci_stack->bondable; 5606 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5607 // if we have received IO Cap Response, we're in responder role 5608 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5609 if (bonding && !remote_bonding){ 5610 log_info("Remote not bonding, dropping local flag"); 5611 bonding = false; 5612 } 5613 } 5614 if (bonding){ 5615 if (connection->bonding_flags & BONDING_DEDICATED){ 5616 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5617 } else { 5618 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5619 } 5620 } 5621 uint8_t have_oob_data = 0; 5622 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5623 if (connection->classic_oob_c_192 != NULL){ 5624 have_oob_data |= 1; 5625 } 5626 if (connection->classic_oob_c_256 != NULL){ 5627 have_oob_data |= 2; 5628 } 5629 #endif 5630 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5631 return true; 5632 } 5633 5634 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5635 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5636 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5637 return true; 5638 } 5639 5640 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5641 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5642 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5643 const uint8_t zero[16] = { 0 }; 5644 const uint8_t * r_192 = zero; 5645 const uint8_t * c_192 = zero; 5646 const uint8_t * r_256 = zero; 5647 const uint8_t * c_256 = zero; 5648 // verify P-256 OOB 5649 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5650 c_256 = connection->classic_oob_c_256; 5651 if (connection->classic_oob_r_256 != NULL) { 5652 r_256 = connection->classic_oob_r_256; 5653 } 5654 } 5655 // verify P-192 OOB 5656 if ((connection->classic_oob_c_192 != NULL)) { 5657 c_192 = connection->classic_oob_c_192; 5658 if (connection->classic_oob_r_192 != NULL) { 5659 r_192 = connection->classic_oob_r_192; 5660 } 5661 } 5662 5663 // assess security 5664 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5665 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5666 if (need_level_4 && !can_reach_level_4){ 5667 log_info("Level 4 required, but not possible -> abort"); 5668 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5669 // send oob negative reply 5670 c_256 = NULL; 5671 c_192 = NULL; 5672 } 5673 5674 // Reply 5675 if (c_256 != zero) { 5676 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5677 } else if (c_192 != zero){ 5678 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5679 } else { 5680 hci_stack->classic_oob_con_handle = connection->con_handle; 5681 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5682 } 5683 return true; 5684 } 5685 #endif 5686 5687 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5688 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5689 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5690 return true; 5691 } 5692 5693 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5694 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5695 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5696 return true; 5697 } 5698 5699 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5700 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5701 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5702 return true; 5703 } 5704 5705 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5706 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5707 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5708 connection->state = SENT_DISCONNECT; 5709 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5710 return true; 5711 } 5712 5713 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5714 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5715 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5716 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5717 return true; 5718 } 5719 5720 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5721 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5722 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5723 return true; 5724 } 5725 5726 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5727 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5728 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5729 return true; 5730 } 5731 5732 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5733 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5734 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5735 return true; 5736 } 5737 5738 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5739 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5740 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5741 return true; 5742 } 5743 5744 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5745 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5746 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5747 return true; 5748 } 5749 #endif 5750 5751 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5752 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5753 #ifdef ENABLE_CLASSIC 5754 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5755 #endif 5756 if (connection->state != SENT_DISCONNECT){ 5757 connection->state = SENT_DISCONNECT; 5758 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5759 return true; 5760 } 5761 } 5762 5763 #ifdef ENABLE_CLASSIC 5764 uint16_t sniff_min_interval; 5765 switch (connection->sniff_min_interval){ 5766 case 0: 5767 break; 5768 case 0xffff: 5769 connection->sniff_min_interval = 0; 5770 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5771 return true; 5772 default: 5773 sniff_min_interval = connection->sniff_min_interval; 5774 connection->sniff_min_interval = 0; 5775 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5776 return true; 5777 } 5778 5779 if (connection->sniff_subrating_max_latency != 0xffff){ 5780 uint16_t max_latency = connection->sniff_subrating_max_latency; 5781 connection->sniff_subrating_max_latency = 0; 5782 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5783 return true; 5784 } 5785 5786 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5787 uint8_t service_type = (uint8_t) connection->qos_service_type; 5788 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5789 hci_send_cmd(&hci_qos_setup, connection->con_handle, 0, service_type, connection->qos_token_rate, connection->qos_peak_bandwidth, connection->qos_latency, connection->qos_delay_variation); 5790 return true; 5791 } 5792 5793 if (connection->request_role != HCI_ROLE_INVALID){ 5794 hci_role_t role = connection->request_role; 5795 connection->request_role = HCI_ROLE_INVALID; 5796 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5797 return true; 5798 } 5799 #endif 5800 5801 if (connection->gap_connection_tasks != 0){ 5802 #ifdef ENABLE_CLASSIC 5803 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5804 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5805 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5806 return true; 5807 } 5808 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5809 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5810 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5811 return true; 5812 } 5813 #endif 5814 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5815 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5816 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5817 return true; 5818 } 5819 } 5820 5821 #ifdef ENABLE_BLE 5822 switch (connection->le_con_parameter_update_state){ 5823 // response to L2CAP CON PARAMETER UPDATE REQUEST 5824 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5825 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5826 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5827 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5828 0x0000, 0xffff); 5829 return true; 5830 case CON_PARAMETER_UPDATE_REPLY: 5831 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5832 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5833 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5834 0x0000, 0xffff); 5835 return true; 5836 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5837 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5838 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5839 return true; 5840 default: 5841 break; 5842 } 5843 if (connection->le_phy_update_all_phys != 0xffu){ 5844 uint8_t all_phys = connection->le_phy_update_all_phys; 5845 connection->le_phy_update_all_phys = 0xff; 5846 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); 5847 return true; 5848 } 5849 #endif 5850 } 5851 return false; 5852 } 5853 5854 static void hci_run(void){ 5855 5856 // stack state sub statemachines 5857 // halting needs to be called even if we cannot send command packet now 5858 switch (hci_stack->state) { 5859 case HCI_STATE_INITIALIZING: 5860 hci_initializing_run(); 5861 break; 5862 case HCI_STATE_HALTING: 5863 hci_halting_run(); 5864 break; 5865 case HCI_STATE_FALLING_ASLEEP: 5866 hci_falling_asleep_run(); 5867 break; 5868 default: 5869 break; 5870 } 5871 5872 bool done; 5873 5874 // send continuation fragments first, as they block the prepared packet buffer 5875 done = hci_run_acl_fragments(); 5876 if (done) return; 5877 5878 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5879 // send host num completed packets next as they don't require num_cmd_packets > 0 5880 if (!hci_can_send_comand_packet_transport()) return; 5881 if (hci_stack->host_completed_packets){ 5882 hci_host_num_completed_packets(); 5883 return; 5884 } 5885 #endif 5886 5887 if (!hci_can_send_command_packet_now()) return; 5888 5889 // global/non-connection oriented commands 5890 5891 5892 #ifdef ENABLE_CLASSIC 5893 // general gap classic 5894 done = hci_run_general_gap_classic(); 5895 if (done) return; 5896 #endif 5897 5898 #ifdef ENABLE_BLE 5899 // general gap le 5900 done = hci_run_general_gap_le(); 5901 if (done) return; 5902 #endif 5903 5904 // send pending HCI commands 5905 hci_run_general_pending_commands(); 5906 } 5907 5908 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5909 // house-keeping 5910 5911 #ifdef ENABLE_CLASSIC 5912 bd_addr_t addr; 5913 hci_connection_t * conn; 5914 #endif 5915 #ifdef ENABLE_LE_CENTRAL 5916 uint8_t initiator_filter_policy; 5917 #endif 5918 5919 uint16_t opcode = little_endian_read_16(packet, 0); 5920 switch (opcode) { 5921 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5922 hci_stack->loopback_mode = packet[3]; 5923 break; 5924 5925 #ifdef ENABLE_CLASSIC 5926 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5927 reverse_bd_addr(&packet[3], addr); 5928 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5929 5930 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5931 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5932 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5933 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5934 } 5935 5936 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5937 if (!conn) { 5938 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5939 if (!conn) { 5940 // notify client that alloc failed 5941 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5942 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5943 } 5944 conn->state = SEND_CREATE_CONNECTION; 5945 conn->role = HCI_ROLE_MASTER; 5946 } 5947 5948 conn->con_handle = HCI_CON_HANDLE_INVALID; 5949 conn->role = HCI_ROLE_INVALID; 5950 5951 log_info("conn state %u", conn->state); 5952 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5953 switch (conn->state) { 5954 // if connection active exists 5955 case OPEN: 5956 // and OPEN, emit connection complete command 5957 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5958 // packet not sent to controller 5959 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5960 case RECEIVED_DISCONNECTION_COMPLETE: 5961 // create connection triggered in disconnect complete event, let's do it now 5962 break; 5963 case SEND_CREATE_CONNECTION: 5964 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5965 if (hci_classic_operation_active()){ 5966 return ERROR_CODE_SUCCESS; 5967 } 5968 #endif 5969 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5970 break; 5971 default: 5972 // otherwise, just ignore as it is already in the open process 5973 // packet not sent to controller 5974 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5975 } 5976 conn->state = SENT_CREATE_CONNECTION; 5977 5978 // track outgoing connection 5979 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5980 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5981 break; 5982 5983 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5984 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5985 // setup_synchronous_connection? Voice setting at offset 22 5986 // TODO: compare to current setting if sco connection already active 5987 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5988 break; 5989 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5990 // accept_synchronous_connection? Voice setting at offset 18 5991 // TODO: compare to current setting if sco connection already active 5992 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5993 // track outgoing connection 5994 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5995 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5996 break; 5997 #endif 5998 #endif 5999 6000 #ifdef ENABLE_BLE 6001 #ifdef ENABLE_LE_CENTRAL 6002 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6003 // white list used? 6004 initiator_filter_policy = packet[7]; 6005 switch (initiator_filter_policy) { 6006 case 0: 6007 // whitelist not used 6008 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6009 break; 6010 case 1: 6011 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6012 break; 6013 default: 6014 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6015 break; 6016 } 6017 // track outgoing connection 6018 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6019 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6020 break; 6021 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6022 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6023 break; 6024 #endif 6025 #endif 6026 default: 6027 break; 6028 } 6029 6030 hci_stack->num_cmd_packets--; 6031 6032 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6033 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6034 if (err != 0){ 6035 return ERROR_CODE_HARDWARE_FAILURE; 6036 } 6037 return ERROR_CODE_SUCCESS; 6038 } 6039 6040 // disconnect because of security block 6041 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6042 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6043 if (!connection) return; 6044 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6045 } 6046 6047 6048 // Configure Secure Simple Pairing 6049 6050 #ifdef ENABLE_CLASSIC 6051 6052 // enable will enable SSP during init 6053 void gap_ssp_set_enable(int enable){ 6054 hci_stack->ssp_enable = enable; 6055 } 6056 6057 static int hci_local_ssp_activated(void){ 6058 return gap_ssp_supported() && hci_stack->ssp_enable; 6059 } 6060 6061 // if set, BTstack will respond to io capability request using authentication requirement 6062 void gap_ssp_set_io_capability(int io_capability){ 6063 hci_stack->ssp_io_capability = io_capability; 6064 } 6065 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6066 hci_stack->ssp_authentication_requirement = authentication_requirement; 6067 } 6068 6069 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6070 void gap_ssp_set_auto_accept(int auto_accept){ 6071 hci_stack->ssp_auto_accept = auto_accept; 6072 } 6073 6074 void gap_secure_connections_enable(bool enable){ 6075 hci_stack->secure_connections_enable = enable; 6076 } 6077 bool gap_secure_connections_active(void){ 6078 return hci_stack->secure_connections_active; 6079 } 6080 6081 #endif 6082 6083 // va_list part of hci_send_cmd 6084 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6085 if (!hci_can_send_command_packet_now()){ 6086 log_error("hci_send_cmd called but cannot send packet now"); 6087 return ERROR_CODE_COMMAND_DISALLOWED; 6088 } 6089 6090 // for HCI INITIALIZATION 6091 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6092 hci_stack->last_cmd_opcode = cmd->opcode; 6093 6094 hci_reserve_packet_buffer(); 6095 uint8_t * packet = hci_stack->hci_packet_buffer; 6096 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6097 uint8_t status = hci_send_cmd_packet(packet, size); 6098 6099 // release packet buffer on error or for synchronous transport implementations 6100 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6101 hci_release_packet_buffer(); 6102 hci_emit_transport_packet_sent(); 6103 } 6104 6105 return status; 6106 } 6107 6108 /** 6109 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6110 */ 6111 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6112 va_list argptr; 6113 va_start(argptr, cmd); 6114 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6115 va_end(argptr); 6116 return status; 6117 } 6118 6119 // Create various non-HCI events. 6120 // TODO: generalize, use table similar to hci_create_command 6121 6122 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6123 // dump packet 6124 if (dump) { 6125 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6126 } 6127 6128 // dispatch to all event handlers 6129 btstack_linked_list_iterator_t it; 6130 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6131 while (btstack_linked_list_iterator_has_next(&it)){ 6132 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6133 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6134 } 6135 } 6136 6137 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6138 if (!hci_stack->acl_packet_handler) return; 6139 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6140 } 6141 6142 #ifdef ENABLE_CLASSIC 6143 static void hci_notify_if_sco_can_send_now(void){ 6144 // notify SCO sender if waiting 6145 if (!hci_stack->sco_waiting_for_can_send_now) return; 6146 if (hci_can_send_sco_packet_now()){ 6147 hci_stack->sco_waiting_for_can_send_now = 0; 6148 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6149 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6150 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6151 } 6152 } 6153 6154 // parsing end emitting has been merged to reduce code size 6155 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6156 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6157 6158 uint8_t * eir_data; 6159 ad_context_t context; 6160 const uint8_t * name; 6161 uint8_t name_len; 6162 6163 if (size < 3) return; 6164 6165 int event_type = hci_event_packet_get_type(packet); 6166 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6167 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6168 6169 switch (event_type){ 6170 case HCI_EVENT_INQUIRY_RESULT: 6171 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6172 if (size != (3 + (num_responses * 14))) return; 6173 break; 6174 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6175 if (size != 257) return; 6176 if (num_responses != 1) return; 6177 break; 6178 default: 6179 return; 6180 } 6181 6182 // event[1] is set at the end 6183 int i; 6184 for (i=0; i<num_responses;i++){ 6185 memset(event, 0, sizeof(event)); 6186 event[0] = GAP_EVENT_INQUIRY_RESULT; 6187 uint8_t event_size = 27; // if name is not set by EIR 6188 6189 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6190 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6191 (void)memcpy(&event[9], 6192 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6193 3); // class of device 6194 (void)memcpy(&event[12], 6195 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6196 2); // clock offset 6197 6198 switch (event_type){ 6199 case HCI_EVENT_INQUIRY_RESULT: 6200 // 14,15,16,17 = 0, size 18 6201 break; 6202 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6203 event[14] = 1; 6204 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6205 // 16,17 = 0, size 18 6206 break; 6207 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6208 event[14] = 1; 6209 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6210 // EIR packets only contain a single inquiry response 6211 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6212 name = NULL; 6213 // Iterate over EIR data 6214 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6215 uint8_t data_type = ad_iterator_get_data_type(&context); 6216 uint8_t data_size = ad_iterator_get_data_len(&context); 6217 const uint8_t * data = ad_iterator_get_data(&context); 6218 // Prefer Complete Local Name over Shortened Local Name 6219 switch (data_type){ 6220 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6221 if (name) continue; 6222 /* fall through */ 6223 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6224 name = data; 6225 name_len = data_size; 6226 break; 6227 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6228 if (data_size != 8) break; 6229 event[16] = 1; 6230 memcpy(&event[17], data, 8); 6231 break; 6232 default: 6233 break; 6234 } 6235 } 6236 if (name){ 6237 event[25] = 1; 6238 // truncate name if needed 6239 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6240 event[26] = len; 6241 (void)memcpy(&event[27], name, len); 6242 event_size += len; 6243 } 6244 break; 6245 default: 6246 return; 6247 } 6248 event[1] = event_size - 2; 6249 hci_emit_event(event, event_size, 1); 6250 } 6251 } 6252 #endif 6253 6254 void hci_emit_state(void){ 6255 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6256 uint8_t event[3]; 6257 event[0] = BTSTACK_EVENT_STATE; 6258 event[1] = sizeof(event) - 2u; 6259 event[2] = hci_stack->state; 6260 hci_emit_event(event, sizeof(event), 1); 6261 } 6262 6263 #ifdef ENABLE_CLASSIC 6264 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6265 uint8_t event[13]; 6266 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6267 event[1] = sizeof(event) - 2; 6268 event[2] = status; 6269 little_endian_store_16(event, 3, con_handle); 6270 reverse_bd_addr(address, &event[5]); 6271 event[11] = 1; // ACL connection 6272 event[12] = 0; // encryption disabled 6273 hci_emit_event(event, sizeof(event), 1); 6274 } 6275 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6276 if (disable_l2cap_timeouts) return; 6277 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6278 uint8_t event[4]; 6279 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6280 event[1] = sizeof(event) - 2; 6281 little_endian_store_16(event, 2, conn->con_handle); 6282 hci_emit_event(event, sizeof(event), 1); 6283 } 6284 #endif 6285 6286 #ifdef ENABLE_BLE 6287 #ifdef ENABLE_LE_CENTRAL 6288 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){ 6289 uint8_t event[21]; 6290 event[0] = HCI_EVENT_LE_META; 6291 event[1] = sizeof(event) - 2u; 6292 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6293 event[3] = status; 6294 little_endian_store_16(event, 4, con_handle); 6295 event[6] = 0; // TODO: role 6296 event[7] = address_type; 6297 reverse_bd_addr(address, &event[8]); 6298 little_endian_store_16(event, 14, 0); // interval 6299 little_endian_store_16(event, 16, 0); // latency 6300 little_endian_store_16(event, 18, 0); // supervision timeout 6301 event[20] = 0; // master clock accuracy 6302 hci_emit_event(event, sizeof(event), 1); 6303 } 6304 #endif 6305 #endif 6306 6307 static void hci_emit_transport_packet_sent(void){ 6308 // notify upper stack that it might be possible to send again 6309 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6310 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6311 } 6312 6313 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6314 uint8_t event[6]; 6315 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6316 event[1] = sizeof(event) - 2u; 6317 event[2] = 0; // status = OK 6318 little_endian_store_16(event, 3, con_handle); 6319 event[5] = reason; 6320 hci_emit_event(event, sizeof(event), 1); 6321 } 6322 6323 static void hci_emit_nr_connections_changed(void){ 6324 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6325 uint8_t event[3]; 6326 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6327 event[1] = sizeof(event) - 2u; 6328 event[2] = nr_hci_connections(); 6329 hci_emit_event(event, sizeof(event), 1); 6330 } 6331 6332 static void hci_emit_hci_open_failed(void){ 6333 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6334 uint8_t event[2]; 6335 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6336 event[1] = sizeof(event) - 2u; 6337 hci_emit_event(event, sizeof(event), 1); 6338 } 6339 6340 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6341 log_info("hci_emit_dedicated_bonding_result %u ", status); 6342 uint8_t event[9]; 6343 int pos = 0; 6344 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6345 event[pos++] = sizeof(event) - 2u; 6346 event[pos++] = status; 6347 reverse_bd_addr(address, &event[pos]); 6348 hci_emit_event(event, sizeof(event), 1); 6349 } 6350 6351 6352 #ifdef ENABLE_CLASSIC 6353 6354 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6355 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6356 uint8_t event[5]; 6357 int pos = 0; 6358 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6359 event[pos++] = sizeof(event) - 2; 6360 little_endian_store_16(event, 2, con_handle); 6361 pos += 2; 6362 event[pos++] = level; 6363 hci_emit_event(event, sizeof(event), 1); 6364 } 6365 6366 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6367 if (!connection) return LEVEL_0; 6368 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6369 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6370 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6371 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6372 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6373 // LEVEL 4 always requires 128 bit encrytion key size 6374 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6375 security_level = LEVEL_3; 6376 } 6377 return security_level; 6378 } 6379 6380 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6381 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6382 uint8_t event[3]; 6383 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6384 event[1] = sizeof(event) - 2; 6385 event[2] = enabled; 6386 hci_emit_event(event, sizeof(event), 1); 6387 } 6388 6389 // query if remote side supports eSCO 6390 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6391 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6392 if (!connection) return false; 6393 return (connection->remote_supported_features[0] & 1) != 0; 6394 } 6395 6396 static bool hci_ssp_supported(hci_connection_t * connection){ 6397 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6398 return (connection->bonding_flags & mask) == mask; 6399 } 6400 6401 // query if remote side supports SSP 6402 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6403 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6404 if (!connection) return false; 6405 return hci_ssp_supported(connection) ? 1 : 0; 6406 } 6407 6408 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6409 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6410 } 6411 6412 /** 6413 * Check if remote supported features query has completed 6414 */ 6415 bool hci_remote_features_available(hci_con_handle_t handle){ 6416 hci_connection_t * connection = hci_connection_for_handle(handle); 6417 if (!connection) return false; 6418 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6419 } 6420 6421 /** 6422 * Trigger remote supported features query 6423 */ 6424 6425 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6426 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6427 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6428 } 6429 } 6430 6431 void hci_remote_features_query(hci_con_handle_t con_handle){ 6432 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6433 if (!connection) return; 6434 hci_trigger_remote_features_for_connection(connection); 6435 hci_run(); 6436 } 6437 6438 // GAP API 6439 /** 6440 * @bbrief enable/disable bonding. default is enabled 6441 * @praram enabled 6442 */ 6443 void gap_set_bondable_mode(int enable){ 6444 hci_stack->bondable = enable ? 1 : 0; 6445 } 6446 /** 6447 * @brief Get bondable mode. 6448 * @return 1 if bondable 6449 */ 6450 int gap_get_bondable_mode(void){ 6451 return hci_stack->bondable; 6452 } 6453 6454 /** 6455 * @brief map link keys to security levels 6456 */ 6457 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6458 switch (link_key_type){ 6459 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6460 return LEVEL_4; 6461 case COMBINATION_KEY: 6462 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6463 return LEVEL_3; 6464 default: 6465 return LEVEL_2; 6466 } 6467 } 6468 6469 /** 6470 * @brief map link keys to secure connection yes/no 6471 */ 6472 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6473 switch (link_key_type){ 6474 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6475 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6476 return true; 6477 default: 6478 return false; 6479 } 6480 } 6481 6482 /** 6483 * @brief map link keys to authenticated 6484 */ 6485 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6486 switch (link_key_type){ 6487 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6488 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6489 return true; 6490 default: 6491 return false; 6492 } 6493 } 6494 6495 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6496 log_info("gap_mitm_protection_required_for_security_level %u", level); 6497 return level > LEVEL_2; 6498 } 6499 6500 /** 6501 * @brief get current security level 6502 */ 6503 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6504 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6505 if (!connection) return LEVEL_0; 6506 return gap_security_level_for_connection(connection); 6507 } 6508 6509 /** 6510 * @brief request connection to device to 6511 * @result GAP_AUTHENTICATION_RESULT 6512 */ 6513 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6514 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6515 if (!connection){ 6516 hci_emit_security_level(con_handle, LEVEL_0); 6517 return; 6518 } 6519 6520 btstack_assert(hci_is_le_connection(connection) == false); 6521 6522 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 6523 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6524 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6525 requested_level = LEVEL_4; 6526 } 6527 6528 gap_security_level_t current_level = gap_security_level(con_handle); 6529 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6530 requested_level, connection->requested_security_level, current_level); 6531 6532 // authentication active if authentication request was sent or planned level > 0 6533 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6534 if (authentication_active){ 6535 // authentication already active 6536 if (connection->requested_security_level < requested_level){ 6537 // increase requested level as new level is higher 6538 // TODO: handle re-authentication when done 6539 connection->requested_security_level = requested_level; 6540 } 6541 } else { 6542 // no request active, notify if security sufficient 6543 if (requested_level <= current_level){ 6544 hci_emit_security_level(con_handle, current_level); 6545 return; 6546 } 6547 6548 // store request 6549 connection->requested_security_level = requested_level; 6550 6551 // request remote features if not already active 6552 hci_remote_features_query(con_handle); 6553 6554 // start to authenticate connection 6555 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6556 hci_run(); 6557 } 6558 } 6559 6560 /** 6561 * @brief start dedicated bonding with device. disconnect after bonding 6562 * @param device 6563 * @param request MITM protection 6564 * @result GAP_DEDICATED_BONDING_COMPLETE 6565 */ 6566 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6567 6568 // create connection state machine 6569 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6570 6571 if (!connection){ 6572 return BTSTACK_MEMORY_ALLOC_FAILED; 6573 } 6574 6575 // delete linkn key 6576 gap_drop_link_key_for_bd_addr(device); 6577 6578 // configure LEVEL_2/3, dedicated bonding 6579 connection->state = SEND_CREATE_CONNECTION; 6580 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6581 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6582 connection->bonding_flags = BONDING_DEDICATED; 6583 6584 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6585 6586 // handle: connnection failure (connection complete != ok) 6587 // handle: authentication failure 6588 // handle: disconnect on done 6589 6590 hci_run(); 6591 6592 return 0; 6593 } 6594 6595 void gap_set_local_name(const char * local_name){ 6596 hci_stack->local_name = local_name; 6597 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6598 // also update EIR if not set by user 6599 if (hci_stack->eir_data == NULL){ 6600 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6601 } 6602 hci_run(); 6603 } 6604 #endif 6605 6606 6607 #ifdef ENABLE_BLE 6608 6609 #ifdef ENABLE_LE_CENTRAL 6610 void gap_start_scan(void){ 6611 hci_stack->le_scanning_enabled = true; 6612 hci_run(); 6613 } 6614 6615 void gap_stop_scan(void){ 6616 hci_stack->le_scanning_enabled = false; 6617 hci_run(); 6618 } 6619 6620 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6621 hci_stack->le_scan_type = scan_type; 6622 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6623 hci_stack->le_scan_interval = scan_interval; 6624 hci_stack->le_scan_window = scan_window; 6625 hci_stack->le_scanning_param_update = true; 6626 hci_run(); 6627 } 6628 6629 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6630 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6631 } 6632 6633 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6634 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6635 if (!conn){ 6636 // disallow if le connection is already outgoing 6637 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6638 log_error("le connection already active"); 6639 return ERROR_CODE_COMMAND_DISALLOWED; 6640 } 6641 6642 log_info("gap_connect: no connection exists yet, creating context"); 6643 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6644 if (!conn){ 6645 // notify client that alloc failed 6646 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6647 log_info("gap_connect: failed to alloc hci_connection_t"); 6648 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6649 } 6650 6651 // set le connecting state 6652 if (hci_is_le_connection_type(addr_type)){ 6653 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6654 } 6655 6656 conn->state = SEND_CREATE_CONNECTION; 6657 log_info("gap_connect: send create connection next"); 6658 hci_run(); 6659 return ERROR_CODE_SUCCESS; 6660 } 6661 6662 if (!hci_is_le_connection(conn) || 6663 (conn->state == SEND_CREATE_CONNECTION) || 6664 (conn->state == SENT_CREATE_CONNECTION)) { 6665 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6666 log_error("gap_connect: classic connection or connect is already being created"); 6667 return GATT_CLIENT_IN_WRONG_STATE; 6668 } 6669 6670 // check if connection was just disconnected 6671 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6672 log_info("gap_connect: send create connection (again)"); 6673 conn->state = SEND_CREATE_CONNECTION; 6674 hci_run(); 6675 return ERROR_CODE_SUCCESS; 6676 } 6677 6678 log_info("gap_connect: context exists with state %u", conn->state); 6679 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6680 hci_run(); 6681 return ERROR_CODE_SUCCESS; 6682 } 6683 6684 // @assumption: only a single outgoing LE Connection exists 6685 static hci_connection_t * gap_get_outgoing_connection(void){ 6686 btstack_linked_item_t *it; 6687 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6688 hci_connection_t * conn = (hci_connection_t *) it; 6689 if (!hci_is_le_connection(conn)) continue; 6690 switch (conn->state){ 6691 case SEND_CREATE_CONNECTION: 6692 case SENT_CREATE_CONNECTION: 6693 case SENT_CANCEL_CONNECTION: 6694 return conn; 6695 default: 6696 break; 6697 }; 6698 } 6699 return NULL; 6700 } 6701 6702 uint8_t gap_connect_cancel(void){ 6703 hci_connection_t * conn = gap_get_outgoing_connection(); 6704 if (!conn) return 0; 6705 switch (conn->state){ 6706 case SEND_CREATE_CONNECTION: 6707 // skip sending create connection and emit event instead 6708 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6709 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6710 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6711 btstack_memory_hci_connection_free( conn ); 6712 break; 6713 case SENT_CREATE_CONNECTION: 6714 // request to send cancel connection 6715 conn->state = SEND_CANCEL_CONNECTION; 6716 hci_run(); 6717 break; 6718 default: 6719 break; 6720 } 6721 return 0; 6722 } 6723 6724 /** 6725 * @brief Set connection parameters for outgoing connections 6726 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6727 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6728 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6729 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6730 * @param conn_latency, default: 4 6731 * @param supervision_timeout (unit: 10ms), default: 720 ms 6732 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6733 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6734 */ 6735 6736 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6737 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6738 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6739 hci_stack->le_connection_scan_interval = conn_scan_interval; 6740 hci_stack->le_connection_scan_window = conn_scan_window; 6741 hci_stack->le_connection_interval_min = conn_interval_min; 6742 hci_stack->le_connection_interval_max = conn_interval_max; 6743 hci_stack->le_connection_latency = conn_latency; 6744 hci_stack->le_supervision_timeout = supervision_timeout; 6745 hci_stack->le_minimum_ce_length = min_ce_length; 6746 hci_stack->le_maximum_ce_length = max_ce_length; 6747 } 6748 #endif 6749 6750 /** 6751 * @brief Updates the connection parameters for a given LE connection 6752 * @param handle 6753 * @param conn_interval_min (unit: 1.25ms) 6754 * @param conn_interval_max (unit: 1.25ms) 6755 * @param conn_latency 6756 * @param supervision_timeout (unit: 10ms) 6757 * @return 0 if ok 6758 */ 6759 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6760 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6761 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6762 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6763 connection->le_conn_interval_min = conn_interval_min; 6764 connection->le_conn_interval_max = conn_interval_max; 6765 connection->le_conn_latency = conn_latency; 6766 connection->le_supervision_timeout = supervision_timeout; 6767 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6768 hci_run(); 6769 return 0; 6770 } 6771 6772 /** 6773 * @brief Request an update of the connection parameter for a given LE connection 6774 * @param handle 6775 * @param conn_interval_min (unit: 1.25ms) 6776 * @param conn_interval_max (unit: 1.25ms) 6777 * @param conn_latency 6778 * @param supervision_timeout (unit: 10ms) 6779 * @return 0 if ok 6780 */ 6781 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6782 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6783 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6784 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6785 connection->le_conn_interval_min = conn_interval_min; 6786 connection->le_conn_interval_max = conn_interval_max; 6787 connection->le_conn_latency = conn_latency; 6788 connection->le_supervision_timeout = supervision_timeout; 6789 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6790 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6791 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6792 return 0; 6793 } 6794 6795 #ifdef ENABLE_LE_PERIPHERAL 6796 6797 /** 6798 * @brief Set Advertisement Data 6799 * @param advertising_data_length 6800 * @param advertising_data (max 31 octets) 6801 * @note data is not copied, pointer has to stay valid 6802 */ 6803 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6804 hci_stack->le_advertisements_data_len = advertising_data_length; 6805 hci_stack->le_advertisements_data = advertising_data; 6806 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6807 hci_run(); 6808 } 6809 6810 /** 6811 * @brief Set Scan Response Data 6812 * @param advertising_data_length 6813 * @param advertising_data (max 31 octets) 6814 * @note data is not copied, pointer has to stay valid 6815 */ 6816 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6817 hci_stack->le_scan_response_data_len = scan_response_data_length; 6818 hci_stack->le_scan_response_data = scan_response_data; 6819 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6820 hci_run(); 6821 } 6822 6823 /** 6824 * @brief Set Advertisement Parameters 6825 * @param adv_int_min 6826 * @param adv_int_max 6827 * @param adv_type 6828 * @param direct_address_type 6829 * @param direct_address 6830 * @param channel_map 6831 * @param filter_policy 6832 * 6833 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6834 */ 6835 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6836 uint8_t direct_address_typ, bd_addr_t direct_address, 6837 uint8_t channel_map, uint8_t filter_policy) { 6838 6839 hci_stack->le_advertisements_interval_min = adv_int_min; 6840 hci_stack->le_advertisements_interval_max = adv_int_max; 6841 hci_stack->le_advertisements_type = adv_type; 6842 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6843 hci_stack->le_advertisements_channel_map = channel_map; 6844 hci_stack->le_advertisements_filter_policy = filter_policy; 6845 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6846 6); 6847 6848 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6849 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6850 hci_run(); 6851 } 6852 6853 /** 6854 * @brief Enable/Disable Advertisements 6855 * @param enabled 6856 */ 6857 void gap_advertisements_enable(int enabled){ 6858 if (enabled == 0){ 6859 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6860 } else { 6861 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6862 } 6863 hci_update_advertisements_enabled_for_current_roles(); 6864 hci_run(); 6865 } 6866 6867 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6868 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6869 btstack_linked_list_iterator_t it; 6870 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6871 while (btstack_linked_list_iterator_has_next(&it)){ 6872 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6873 if ( item->advertising_handle == advertising_handle ) { 6874 return item; 6875 } 6876 } 6877 return NULL; 6878 } 6879 6880 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6881 // find free advertisement handle 6882 uint8_t advertisement_handle; 6883 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6884 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6885 } 6886 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6887 // clear 6888 memset(storage, 0, sizeof(le_advertising_set_t)); 6889 // copy params 6890 storage->advertising_handle = advertisement_handle; 6891 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6892 // add to list 6893 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6894 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6895 *out_advertising_handle = advertisement_handle; 6896 // set tasks and start 6897 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6898 hci_run(); 6899 return ERROR_CODE_SUCCESS; 6900 } 6901 6902 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6903 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6904 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6905 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6906 // set tasks and start 6907 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6908 hci_run(); 6909 return ERROR_CODE_SUCCESS; 6910 } 6911 6912 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6913 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6914 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6915 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6916 return ERROR_CODE_SUCCESS; 6917 } 6918 6919 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6920 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6921 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6922 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6923 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6924 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6925 // set tasks and start 6926 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6927 hci_run(); 6928 return ERROR_CODE_SUCCESS; 6929 } 6930 6931 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6932 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6933 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6934 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6935 return ERROR_CODE_SUCCESS; 6936 } 6937 6938 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6939 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6940 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6941 memcpy(advertising_set->random_address, random_address, 6); 6942 // set tasks and start 6943 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6944 hci_run(); 6945 return ERROR_CODE_SUCCESS; 6946 } 6947 6948 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6949 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6950 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6951 advertising_set->adv_data = advertising_data; 6952 advertising_set->adv_data_len = advertising_data_length; 6953 // set tasks and start 6954 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6955 hci_run(); 6956 return ERROR_CODE_SUCCESS; 6957 } 6958 6959 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, const uint8_t * scan_response_data){ 6960 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6961 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6962 advertising_set->scan_data = scan_response_data; 6963 advertising_set->scan_data_len = scan_response_data_length; 6964 // set tasks and start 6965 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6966 hci_run(); 6967 return ERROR_CODE_SUCCESS; 6968 } 6969 6970 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6971 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6972 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6973 advertising_set->periodic_data = periodic_data; 6974 advertising_set->periodic_data_len = periodic_data_length; 6975 // set tasks and start 6976 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6977 hci_run(); 6978 return ERROR_CODE_SUCCESS; 6979 } 6980 6981 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6982 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6983 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6984 advertising_set->enable_timeout = timeout; 6985 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6986 // set tasks and start 6987 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6988 hci_run(); 6989 return ERROR_CODE_SUCCESS; 6990 } 6991 6992 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6993 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6994 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6995 // set tasks and start 6996 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6997 hci_run(); 6998 return ERROR_CODE_SUCCESS; 6999 } 7000 7001 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7002 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7003 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7004 // set tasks and start 7005 advertising_set->periodic_include_adi = include_adi; 7006 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7007 hci_run(); 7008 return ERROR_CODE_SUCCESS; 7009 } 7010 7011 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7012 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7013 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7014 // set tasks and start 7015 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7016 hci_run(); 7017 return ERROR_CODE_SUCCESS; 7018 } 7019 7020 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7021 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7022 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7023 // set tasks and start 7024 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7025 hci_run(); 7026 return ERROR_CODE_SUCCESS; 7027 } 7028 #endif 7029 7030 #endif 7031 7032 void hci_le_set_own_address_type(uint8_t own_address_type){ 7033 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7034 if (own_address_type == hci_stack->le_own_addr_type) return; 7035 hci_stack->le_own_addr_type = own_address_type; 7036 7037 #ifdef ENABLE_LE_PERIPHERAL 7038 // update advertisement parameters, too 7039 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7040 hci_run(); 7041 #endif 7042 #ifdef ENABLE_LE_CENTRAL 7043 // note: we don't update scan parameters or modify ongoing connection attempts 7044 #endif 7045 } 7046 7047 void hci_le_random_address_set(const bd_addr_t random_address){ 7048 memcpy(hci_stack->le_random_address, random_address, 6); 7049 hci_stack->le_random_address_set = true; 7050 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7051 hci_run(); 7052 } 7053 7054 #endif 7055 7056 uint8_t gap_disconnect(hci_con_handle_t handle){ 7057 hci_connection_t * conn = hci_connection_for_handle(handle); 7058 if (!conn){ 7059 hci_emit_disconnection_complete(handle, 0); 7060 return 0; 7061 } 7062 // ignore if already disconnected 7063 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7064 return 0; 7065 } 7066 conn->state = SEND_DISCONNECT; 7067 hci_run(); 7068 return 0; 7069 } 7070 7071 int gap_read_rssi(hci_con_handle_t con_handle){ 7072 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7073 if (hci_connection == NULL) return 0; 7074 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7075 hci_run(); 7076 return 1; 7077 } 7078 7079 /** 7080 * @brief Get connection type 7081 * @param con_handle 7082 * @result connection_type 7083 */ 7084 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7085 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7086 if (!conn) return GAP_CONNECTION_INVALID; 7087 switch (conn->address_type){ 7088 case BD_ADDR_TYPE_LE_PUBLIC: 7089 case BD_ADDR_TYPE_LE_RANDOM: 7090 return GAP_CONNECTION_LE; 7091 case BD_ADDR_TYPE_SCO: 7092 return GAP_CONNECTION_SCO; 7093 case BD_ADDR_TYPE_ACL: 7094 return GAP_CONNECTION_ACL; 7095 default: 7096 return GAP_CONNECTION_INVALID; 7097 } 7098 } 7099 7100 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7101 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7102 if (!conn) return HCI_ROLE_INVALID; 7103 return (hci_role_t) conn->role; 7104 } 7105 7106 7107 #ifdef ENABLE_CLASSIC 7108 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7109 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7110 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7111 conn->request_role = role; 7112 hci_run(); 7113 return ERROR_CODE_SUCCESS; 7114 } 7115 #endif 7116 7117 #ifdef ENABLE_BLE 7118 7119 uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 7120 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7121 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7122 7123 conn->le_phy_update_all_phys = all_phys; 7124 conn->le_phy_update_tx_phys = tx_phys; 7125 conn->le_phy_update_rx_phys = rx_phys; 7126 conn->le_phy_update_phy_options = phy_options; 7127 7128 hci_run(); 7129 7130 return 0; 7131 } 7132 7133 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7134 // check if already in list 7135 btstack_linked_list_iterator_t it; 7136 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7137 while (btstack_linked_list_iterator_has_next(&it)) { 7138 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7139 if (entry->address_type != address_type) { 7140 continue; 7141 } 7142 if (memcmp(entry->address, address, 6) != 0) { 7143 continue; 7144 } 7145 // disallow if already scheduled to add 7146 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7147 return ERROR_CODE_COMMAND_DISALLOWED; 7148 } 7149 // still on controller, but scheduled to remove -> re-add 7150 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7151 return ERROR_CODE_SUCCESS; 7152 } 7153 // alloc and add to list 7154 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7155 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7156 entry->address_type = address_type; 7157 (void)memcpy(entry->address, address, 6); 7158 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7159 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7160 return ERROR_CODE_SUCCESS; 7161 } 7162 7163 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7164 btstack_linked_list_iterator_t it; 7165 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7166 while (btstack_linked_list_iterator_has_next(&it)){ 7167 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7168 if (entry->address_type != address_type) { 7169 continue; 7170 } 7171 if (memcmp(entry->address, address, 6) != 0) { 7172 continue; 7173 } 7174 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7175 // remove from controller if already present 7176 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7177 } else { 7178 // directly remove entry from whitelist 7179 btstack_linked_list_iterator_remove(&it); 7180 btstack_memory_whitelist_entry_free(entry); 7181 } 7182 return ERROR_CODE_SUCCESS; 7183 } 7184 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7185 } 7186 7187 static void hci_whitelist_clear(void){ 7188 btstack_linked_list_iterator_t it; 7189 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7190 while (btstack_linked_list_iterator_has_next(&it)){ 7191 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7192 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7193 // remove from controller if already present 7194 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7195 continue; 7196 } 7197 // directly remove entry from whitelist 7198 btstack_linked_list_iterator_remove(&it); 7199 btstack_memory_whitelist_entry_free(entry); 7200 } 7201 } 7202 7203 // free all entries unconditionally 7204 static void hci_whitelist_free(void){ 7205 btstack_linked_list_iterator_t lit; 7206 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7207 while (btstack_linked_list_iterator_has_next(&lit)){ 7208 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7209 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7210 btstack_memory_whitelist_entry_free(entry); 7211 } 7212 } 7213 7214 /** 7215 * @brief Clear Whitelist 7216 * @return 0 if ok 7217 */ 7218 uint8_t gap_whitelist_clear(void){ 7219 hci_whitelist_clear(); 7220 hci_run(); 7221 return ERROR_CODE_SUCCESS; 7222 } 7223 7224 /** 7225 * @brief Add Device to Whitelist 7226 * @param address_typ 7227 * @param address 7228 * @return 0 if ok 7229 */ 7230 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7231 uint8_t status = hci_whitelist_add(address_type, address); 7232 if (status){ 7233 return status; 7234 } 7235 hci_run(); 7236 return ERROR_CODE_SUCCESS; 7237 } 7238 7239 /** 7240 * @brief Remove Device from Whitelist 7241 * @param address_typ 7242 * @param address 7243 * @return 0 if ok 7244 */ 7245 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7246 uint8_t status = hci_whitelist_remove(address_type, address); 7247 if (status){ 7248 return status; 7249 } 7250 hci_run(); 7251 return ERROR_CODE_SUCCESS; 7252 } 7253 7254 #ifdef ENABLE_LE_CENTRAL 7255 /** 7256 * @brief Connect with Whitelist 7257 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7258 * @return - if ok 7259 */ 7260 uint8_t gap_connect_with_whitelist(void){ 7261 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7262 return ERROR_CODE_COMMAND_DISALLOWED; 7263 } 7264 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7265 hci_run(); 7266 return ERROR_CODE_SUCCESS; 7267 } 7268 7269 /** 7270 * @brief Auto Connection Establishment - Start Connecting to device 7271 * @param address_typ 7272 * @param address 7273 * @return 0 if ok 7274 */ 7275 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7276 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7277 return ERROR_CODE_COMMAND_DISALLOWED; 7278 } 7279 7280 uint8_t status = hci_whitelist_add(address_type, address); 7281 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7282 return status; 7283 } 7284 7285 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7286 7287 hci_run(); 7288 return ERROR_CODE_SUCCESS; 7289 } 7290 7291 /** 7292 * @brief Auto Connection Establishment - Stop Connecting to device 7293 * @param address_typ 7294 * @param address 7295 * @return 0 if ok 7296 */ 7297 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7298 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7299 return ERROR_CODE_COMMAND_DISALLOWED; 7300 } 7301 7302 hci_whitelist_remove(address_type, address); 7303 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7304 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7305 } 7306 hci_run(); 7307 return 0; 7308 } 7309 7310 /** 7311 * @brief Auto Connection Establishment - Stop everything 7312 * @note Convenience function to stop all active auto connection attempts 7313 */ 7314 uint8_t gap_auto_connection_stop_all(void){ 7315 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7316 return ERROR_CODE_COMMAND_DISALLOWED; 7317 } 7318 hci_whitelist_clear(); 7319 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7320 hci_run(); 7321 return ERROR_CODE_SUCCESS; 7322 } 7323 7324 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7325 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7326 if (!conn) return 0; 7327 return conn->le_connection_interval; 7328 } 7329 #endif 7330 #endif 7331 7332 #ifdef ENABLE_CLASSIC 7333 /** 7334 * @brief Set Extended Inquiry Response data 7335 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7336 * @note has to be done before stack starts up 7337 */ 7338 void gap_set_extended_inquiry_response(const uint8_t * data){ 7339 hci_stack->eir_data = data; 7340 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7341 hci_run(); 7342 } 7343 7344 /** 7345 * @brief Start GAP Classic Inquiry 7346 * @param duration in 1.28s units 7347 * @return 0 if ok 7348 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7349 */ 7350 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7351 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7352 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7353 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7354 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7355 } 7356 hci_stack->inquiry_state = duration_in_1280ms_units; 7357 hci_run(); 7358 return 0; 7359 } 7360 7361 /** 7362 * @brief Stop GAP Classic Inquiry 7363 * @return 0 if ok 7364 */ 7365 int gap_inquiry_stop(void){ 7366 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7367 // emit inquiry complete event, before it even started 7368 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7369 hci_emit_event(event, sizeof(event), 1); 7370 return 0; 7371 } 7372 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7373 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7374 hci_run(); 7375 return 0; 7376 } 7377 7378 void gap_inquiry_set_lap(uint32_t lap){ 7379 hci_stack->inquiry_lap = lap; 7380 } 7381 7382 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7383 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7384 hci_stack->inquiry_scan_window = inquiry_scan_window; 7385 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7386 hci_run(); 7387 } 7388 7389 7390 /** 7391 * @brief Remote Name Request 7392 * @param addr 7393 * @param page_scan_repetition_mode 7394 * @param clock_offset only used when bit 15 is set 7395 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7396 */ 7397 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7398 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7399 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7400 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7401 hci_stack->remote_name_clock_offset = clock_offset; 7402 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7403 hci_run(); 7404 return 0; 7405 } 7406 7407 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7408 hci_stack->gap_pairing_state = state; 7409 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7410 hci_run(); 7411 return 0; 7412 } 7413 7414 /** 7415 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7416 * @param addr 7417 * @param pin_data 7418 * @param pin_len 7419 * @return 0 if ok 7420 */ 7421 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7422 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7423 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7424 hci_stack->gap_pairing_pin_len = pin_len; 7425 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7426 } 7427 7428 /** 7429 * @brief Legacy Pairing Pin Code Response 7430 * @param addr 7431 * @param pin 7432 * @return 0 if ok 7433 */ 7434 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7435 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7436 } 7437 7438 /** 7439 * @brief Abort Legacy Pairing 7440 * @param addr 7441 * @param pin 7442 * @return 0 if ok 7443 */ 7444 int gap_pin_code_negative(bd_addr_t addr){ 7445 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7446 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7447 } 7448 7449 /** 7450 * @brief SSP Passkey Response 7451 * @param addr 7452 * @param passkey 7453 * @return 0 if ok 7454 */ 7455 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7456 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7457 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7458 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7459 } 7460 7461 /** 7462 * @brief Abort SSP Passkey Entry/Pairing 7463 * @param addr 7464 * @param pin 7465 * @return 0 if ok 7466 */ 7467 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7468 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7469 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7470 } 7471 7472 /** 7473 * @brief Accept SSP Numeric Comparison 7474 * @param addr 7475 * @param passkey 7476 * @return 0 if ok 7477 */ 7478 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7479 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7480 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7481 } 7482 7483 /** 7484 * @brief Abort SSP Numeric Comparison/Pairing 7485 * @param addr 7486 * @param pin 7487 * @return 0 if ok 7488 */ 7489 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7490 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7491 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7492 } 7493 7494 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7495 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7496 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7497 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7498 connectionSetAuthenticationFlags(conn, flag); 7499 hci_run(); 7500 return ERROR_CODE_SUCCESS; 7501 } 7502 #endif 7503 7504 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7505 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7506 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7507 } 7508 7509 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7510 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7511 } 7512 #endif 7513 7514 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7515 /** 7516 * @brief Report Remote OOB Data 7517 * @param bd_addr 7518 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7519 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7520 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7521 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7522 */ 7523 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 7524 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7525 if (connection == NULL) { 7526 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7527 } 7528 connection->classic_oob_c_192 = c_192; 7529 connection->classic_oob_r_192 = r_192; 7530 7531 // ignore P-256 if not supported by us 7532 if (hci_stack->secure_connections_active){ 7533 connection->classic_oob_c_256 = c_256; 7534 connection->classic_oob_r_256 = r_256; 7535 } 7536 7537 return ERROR_CODE_SUCCESS; 7538 } 7539 /** 7540 * @brief Generate new OOB data 7541 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7542 */ 7543 void gap_ssp_generate_oob_data(void){ 7544 hci_stack->classic_read_local_oob_data = true; 7545 hci_run(); 7546 } 7547 7548 #endif 7549 7550 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7551 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7552 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7553 if (connection == NULL) { 7554 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7555 } 7556 7557 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7558 connection->link_key_type = type; 7559 7560 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7561 } 7562 7563 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7564 /** 7565 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7566 * @param inquiry_mode see bluetooth_defines.h 7567 */ 7568 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7569 hci_stack->inquiry_mode = inquiry_mode; 7570 } 7571 7572 /** 7573 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7574 */ 7575 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7576 hci_stack->sco_voice_setting = voice_setting; 7577 } 7578 7579 /** 7580 * @brief Get SCO Voice Setting 7581 * @return current voice setting 7582 */ 7583 uint16_t hci_get_sco_voice_setting(void){ 7584 return hci_stack->sco_voice_setting; 7585 } 7586 7587 static int hci_have_usb_transport(void){ 7588 if (!hci_stack->hci_transport) return 0; 7589 const char * transport_name = hci_stack->hci_transport->name; 7590 if (!transport_name) return 0; 7591 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7592 } 7593 7594 /** @brief Get SCO packet length for current SCO Voice setting 7595 * @note Using SCO packets of the exact length is required for USB transfer 7596 * @return Length of SCO packets in bytes (not audio frames) 7597 */ 7598 uint16_t hci_get_sco_packet_length(void){ 7599 uint16_t sco_packet_length = 0; 7600 7601 #ifdef ENABLE_SCO_OVER_HCI 7602 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7603 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7604 7605 if (hci_have_usb_transport()){ 7606 // see Core Spec for H2 USB Transfer. 7607 // 3 byte SCO header + 24 bytes per connection 7608 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7609 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7610 } else { 7611 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7612 sco_packet_length = 3 + 60 * multiplier; 7613 // assert that it still fits inside an SCO buffer 7614 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7615 sco_packet_length = 3 + 60; 7616 } 7617 } 7618 #endif 7619 7620 #ifdef HAVE_SCO_TRANSPORT 7621 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7622 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7623 sco_packet_length = 3 + 60 * multiplier; 7624 #endif 7625 return sco_packet_length; 7626 } 7627 7628 /** 7629 * @brief Sets the master/slave policy 7630 * @param policy (0: attempt to become master, 1: let connecting device decide) 7631 */ 7632 void hci_set_master_slave_policy(uint8_t policy){ 7633 hci_stack->master_slave_policy = policy; 7634 } 7635 7636 #endif 7637 7638 HCI_STATE hci_get_state(void){ 7639 return hci_stack->state; 7640 } 7641 7642 #ifdef ENABLE_CLASSIC 7643 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7644 hci_stack->gap_classic_accept_callback = accept_callback; 7645 } 7646 #endif 7647 7648 /** 7649 * @brief Set callback for Bluetooth Hardware Error 7650 */ 7651 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7652 hci_stack->hardware_error_callback = fn; 7653 } 7654 7655 void hci_disconnect_all(void){ 7656 btstack_linked_list_iterator_t it; 7657 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7658 while (btstack_linked_list_iterator_has_next(&it)){ 7659 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7660 if (con->state == SENT_DISCONNECT) continue; 7661 con->state = SEND_DISCONNECT; 7662 } 7663 hci_run(); 7664 } 7665 7666 uint16_t hci_get_manufacturer(void){ 7667 return hci_stack->manufacturer; 7668 } 7669 7670 #ifdef ENABLE_BLE 7671 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7672 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7673 if (!hci_con) return NULL; 7674 return &hci_con->sm_connection; 7675 } 7676 7677 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7678 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7679 #endif 7680 7681 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7682 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7683 if (hci_connection == NULL) return 0; 7684 if (hci_is_le_connection(hci_connection)){ 7685 #ifdef ENABLE_BLE 7686 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7687 if (sm_conn->sm_connection_encrypted) { 7688 return sm_conn->sm_actual_encryption_key_size; 7689 } 7690 #endif 7691 } else { 7692 #ifdef ENABLE_CLASSIC 7693 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7694 return hci_connection->encryption_key_size; 7695 } 7696 #endif 7697 } 7698 return 0; 7699 } 7700 7701 bool gap_authenticated(hci_con_handle_t con_handle){ 7702 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7703 if (hci_connection == NULL) return false; 7704 7705 switch (hci_connection->address_type){ 7706 #ifdef ENABLE_BLE 7707 case BD_ADDR_TYPE_LE_PUBLIC: 7708 case BD_ADDR_TYPE_LE_RANDOM: 7709 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7710 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7711 #endif 7712 #ifdef ENABLE_CLASSIC 7713 case BD_ADDR_TYPE_SCO: 7714 case BD_ADDR_TYPE_ACL: 7715 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7716 #endif 7717 default: 7718 return false; 7719 } 7720 } 7721 7722 bool gap_secure_connection(hci_con_handle_t con_handle){ 7723 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7724 if (hci_connection == NULL) return 0; 7725 7726 switch (hci_connection->address_type){ 7727 #ifdef ENABLE_BLE 7728 case BD_ADDR_TYPE_LE_PUBLIC: 7729 case BD_ADDR_TYPE_LE_RANDOM: 7730 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7731 return hci_connection->sm_connection.sm_connection_sc != 0; 7732 #endif 7733 #ifdef ENABLE_CLASSIC 7734 case BD_ADDR_TYPE_SCO: 7735 case BD_ADDR_TYPE_ACL: 7736 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7737 #endif 7738 default: 7739 return false; 7740 } 7741 } 7742 7743 bool gap_bonded(hci_con_handle_t con_handle){ 7744 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7745 if (hci_connection == NULL) return 0; 7746 7747 #ifdef ENABLE_CLASSIC 7748 link_key_t link_key; 7749 link_key_type_t link_key_type; 7750 #endif 7751 switch (hci_connection->address_type){ 7752 #ifdef ENABLE_BLE 7753 case BD_ADDR_TYPE_LE_PUBLIC: 7754 case BD_ADDR_TYPE_LE_RANDOM: 7755 return hci_connection->sm_connection.sm_le_db_index >= 0; 7756 #endif 7757 #ifdef ENABLE_CLASSIC 7758 case BD_ADDR_TYPE_SCO: 7759 case BD_ADDR_TYPE_ACL: 7760 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7761 #endif 7762 default: 7763 return false; 7764 } 7765 } 7766 7767 #ifdef ENABLE_BLE 7768 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7769 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7770 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7771 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7772 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7773 return sm_conn->sm_connection_authorization_state; 7774 } 7775 #endif 7776 7777 #ifdef ENABLE_CLASSIC 7778 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){ 7779 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7780 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7781 conn->sniff_min_interval = sniff_min_interval; 7782 conn->sniff_max_interval = sniff_max_interval; 7783 conn->sniff_attempt = sniff_attempt; 7784 conn->sniff_timeout = sniff_timeout; 7785 hci_run(); 7786 return 0; 7787 } 7788 7789 /** 7790 * @brief Exit Sniff mode 7791 * @param con_handle 7792 @ @return 0 if ok 7793 */ 7794 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7795 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7796 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7797 conn->sniff_min_interval = 0xffff; 7798 hci_run(); 7799 return 0; 7800 } 7801 7802 uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout){ 7803 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7804 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7805 conn->sniff_subrating_max_latency = max_latency; 7806 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7807 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7808 hci_run(); 7809 return ERROR_CODE_SUCCESS; 7810 } 7811 7812 uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation){ 7813 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7814 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7815 conn->qos_service_type = service_type; 7816 conn->qos_token_rate = token_rate; 7817 conn->qos_peak_bandwidth = peak_bandwidth; 7818 conn->qos_latency = latency; 7819 conn->qos_delay_variation = delay_variation; 7820 hci_run(); 7821 return ERROR_CODE_SUCCESS; 7822 } 7823 7824 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7825 hci_stack->new_page_scan_interval = page_scan_interval; 7826 hci_stack->new_page_scan_window = page_scan_window; 7827 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7828 hci_run(); 7829 } 7830 7831 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7832 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7833 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7834 hci_run(); 7835 } 7836 7837 void gap_set_page_timeout(uint16_t page_timeout){ 7838 hci_stack->page_timeout = page_timeout; 7839 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7840 hci_run(); 7841 } 7842 7843 #endif 7844 7845 void hci_halting_defer(void){ 7846 if (hci_stack->state != HCI_STATE_HALTING) return; 7847 switch (hci_stack->substate){ 7848 case HCI_HALTING_READY_FOR_CLOSE: 7849 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7850 break; 7851 default: 7852 break; 7853 } 7854 } 7855 7856 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7857 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7858 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7859 if (le_device_db_index >= le_device_db_max_count()) return; 7860 uint8_t offset = le_device_db_index >> 3; 7861 uint8_t mask = 1 << (le_device_db_index & 7); 7862 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7863 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7864 // note: go back to remove entries, otherwise, a remove + add will skip the add 7865 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7866 } 7867 } 7868 7869 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7870 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7871 if (le_device_db_index >= le_device_db_max_count()) return; 7872 uint8_t offset = le_device_db_index >> 3; 7873 uint8_t mask = 1 << (le_device_db_index & 7); 7874 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7875 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7876 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7877 } 7878 } 7879 7880 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7881 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7882 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7883 } 7884 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7885 // restart le resolving list update 7886 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7887 } 7888 return ERROR_CODE_SUCCESS; 7889 } 7890 #endif 7891 7892 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7893 void hci_setup_test_connections_fuzz(void){ 7894 hci_connection_t * conn; 7895 7896 // default address: 66:55:44:33:00:01 7897 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7898 7899 // setup Controller info 7900 hci_stack->num_cmd_packets = 255; 7901 hci_stack->acl_packets_total_num = 255; 7902 7903 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7904 addr[5] = 0x01; 7905 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7906 conn->con_handle = addr[5]; 7907 conn->role = HCI_ROLE_SLAVE; 7908 conn->state = RECEIVED_CONNECTION_REQUEST; 7909 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7910 7911 // setup incoming Classic SCO connection with con handle 0x0002 7912 addr[5] = 0x02; 7913 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7914 conn->con_handle = addr[5]; 7915 conn->role = HCI_ROLE_SLAVE; 7916 conn->state = RECEIVED_CONNECTION_REQUEST; 7917 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7918 7919 // setup ready Classic ACL connection with con handle 0x0003 7920 addr[5] = 0x03; 7921 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7922 conn->con_handle = addr[5]; 7923 conn->role = HCI_ROLE_SLAVE; 7924 conn->state = OPEN; 7925 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7926 7927 // setup ready Classic SCO connection with con handle 0x0004 7928 addr[5] = 0x04; 7929 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7930 conn->con_handle = addr[5]; 7931 conn->role = HCI_ROLE_SLAVE; 7932 conn->state = OPEN; 7933 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7934 7935 // setup ready LE ACL connection with con handle 0x005 and public address 7936 addr[5] = 0x05; 7937 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7938 conn->con_handle = addr[5]; 7939 conn->role = HCI_ROLE_SLAVE; 7940 conn->state = OPEN; 7941 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7942 conn->sm_connection.sm_connection_encrypted = 1; 7943 } 7944 7945 void hci_free_connections_fuzz(void){ 7946 btstack_linked_list_iterator_t it; 7947 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7948 while (btstack_linked_list_iterator_has_next(&it)){ 7949 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7950 btstack_linked_list_iterator_remove(&it); 7951 btstack_memory_hci_connection_free(con); 7952 } 7953 } 7954 void hci_simulate_working_fuzz(void){ 7955 hci_stack->le_scanning_param_update = false; 7956 hci_init_done(); 7957 hci_stack->num_cmd_packets = 255; 7958 } 7959 #endif 7960